JP6018447B2 - Battery system - Google Patents

Description

  The present invention relates to a storage battery system that charges a secondary battery with power from a system, discharges the secondary battery, and supplies power to a load.

  As this type of home storage battery system, for example, in Patent Document 1, a charge / discharge control unit having a power conversion function is connected between a commercial power system and a load, and via this charge / discharge control unit, There is disclosed a device that controls charging / discharging of a secondary battery by charging a secondary battery, which is a storage battery, with power from a system, or discharging the secondary battery and supplying power to a load.

  Another patent document 2 discloses that a secondary battery is charged during a time period when the electricity charge of the system is relatively low, while a secondary battery is discharged during a time period when the electricity charge is relatively high. A storage battery system capable of reducing the cost is disclosed.

JP 2002-199588 A JP 2011-72166 A

  The conventional storage battery system has a rated output that is linked to the grid at normal times, and if the secondary battery is discharged in the event of a power failure when the power supply from the grid is cut off, the secondary battery is used up in a short time. There is a risk that it will end. On the other hand, if the secondary battery is to be discharged at the normal output with the rated output at the time of power failure, there is a concern that the necessary power cannot be supplied from the secondary battery in response to the peak shift.

  Therefore, the present invention has an object to provide a storage battery system that can use a load for a long time in the event of a power failure, while being able to use a large amount of electric power for the load at a normal time, and can cope with more peak shifts. And

The invention of claim 1 is a secondary battery, a storage battery control unit that recognizes and controls the state of the secondary battery, a charge / discharge control unit that controls charge / discharge of the secondary battery , a power failure open / close unit, The power cut-off switching unit is turned on in a normal state in cooperation with the grid, and the power from the secondary battery is supplied to the first load and the second load. parts in the off state, the power from the secondary battery and only supplied configuration to the second load, the charging and discharging control unit, the rated output from the secondary battery when it is determined that the power failure, In order to supply power to the second load at the same voltage during the normal time and during the power failure, the power is supplied to the second load so as to be less than the rated output from the secondary battery when linked with the system. A feature of controlling the discharge of the secondary battery

  The invention of claim 2 is characterized in that the secondary battery, the storage battery control unit, and the charge / discharge control unit are accommodated in a storage battery casing.

That the invention of claim 3, the rated output from the secondary battery when it is determined that the power failure, the is less than 2/3 of the rated output from the secondary battery if cooperation with the system Features.

According to the first aspect of the present invention , the power failure switching unit is turned on in the normal state, and the secondary battery is controlled to discharge, whereby the power stored in the secondary battery can be supplied to the first load and the second load. In the event of a power failure, the power failure switch is turned off, and discharge control of the secondary battery enables power supply from the secondary battery only to the second load. In addition, during a power failure, the rated output from the secondary battery is reduced to enable long-term use for the second load, while during normal operation linked to the grid, the rated output from the secondary battery is increased, A large amount of power can be used for the first load and the second load at a time, and a lot of peak shifts can be handled by using up the secondary battery in a short time.

  According to invention of Claim 2, a secondary battery, a storage battery control unit, and a charging / discharging control part can be collectively accommodated in the inside of a common storage battery housing | casing.

  According to the invention of claim 3, the rated output from the secondary battery when it is determined that there is a power outage can be 2/3 or less of the rated output from the secondary battery when linked with the system.

It is a systematic diagram which shows the electrical constitution of the storage battery system in one Embodiment of this invention. It is a conceptual diagram of the storage battery system at the normal time. It is a conceptual diagram of the storage battery system at the time of a power failure. It is the front view and side view of a controller of the state which opened the door same as the above. It is the front view and side view of a controller of the state which closed the door same as the above. It is the perspective view which looked at each wired type and wireless type IT adapter from the same direction as the above. FIG. 7 is a perspective view of the wired type and wireless type IT adapters as seen from the opposite direction to FIG. 6. It is a rear view of the controller which mounted the cable type IT adapter same as the above. FIG. 9 is a side view of the controller shown in FIG. 8 with the case removed. FIG. 3 is a rear view of the controller with the wireless type IT adapter attached, with the cover removed. It is a block diagram which shows the outline | summary of the structure relevant to the control system of a controller same as the above. FIG. 4 is a block diagram of the configuration related to the parameter setting means. It is a block diagram of the structure relevant to a charge / discharge control instruction | indication means same as the above. It is a front view which shows the display form of the display part in a menu selection state same as the above. It is a front view which shows the display form of the display part in a time setting state same as the above. It is a front view which shows the display form of the display part for a timer setting same as the above. It is a front view which shows the display form of the display part for timer switching setting same as the above. It is a front view which shows the display form of the display part for charging time setting same as the above. It is a front view which shows the display form of the display part for discharge time setting same as the above. It is a front view which shows the display form of the display part for battery remaining charge setting same as the above. It is a front view which shows the display form of the display part in recommendation mode same as the above. It is a front view which shows the display form of the display part in a timer mode same as the above. It is a front view which shows the display form of the display part in charge mode same as the above. It is a front view which shows the display form of the display part in discharge mode same as the above. It is a front view which shows the display form of the display part in assist mode same as the above. It is a front view which shows the display form of the display part in a power failure independent operation mode same as the above.

  DESCRIPTION OF EMBODIMENTS Hereinafter, a preferred embodiment of a stationary household storage battery system according to the present invention will be described with reference to the accompanying drawings.

  In FIG. 1 showing an electrical configuration, a storage battery system 1 in the present embodiment includes an AC power from a single-phase three-wire 200V commercial power system S and a DC from a solar cell 2 installed outdoors in a residential premises. It operates using electric power as a power source. The first residential distribution board (hereinafter referred to as the first distribution board) 4 and the second residential distribution board (hereinafter referred to as the second distribution board) installed in the house, that is, indoors, respectively. 5) and a controller 6 and a storage battery panel 7 installed outdoors in a residential premises.

  The three-wire first power supply line 8 whose one end is connected to the system S is composed of two voltage lines and one neutral line (not shown), and is drawn into the first distribution board 4 and wired. The first distribution board 4 includes a main breaker 12, a solar interconnection breaker 13, a branch breaker 14, and a first current for load current detection in addition to a contract breaker 11 with an electric power company that owns the grid S. A transformer 15 and the like are incorporated therein, and the contract breaker 11, the main breaker 12, and the first current transformer 15 are inserted and connected in order from one end of the first power supply line 8 to the other end.

  One end of a first branch line 16 having a branch breaker 14 inserted and connected to each other is connected to the other end of the first power line 8, and the other end of the first branch line 16 is connected to the other end of the first power line 8 at the time of power failure. The in-house load L1 is connected as the first load to be backed up. The first branch line 16 is a three-wire system using the above-described two voltage lines and one neutral wire, or a two-wire system using any one voltage line and neutral wire, so The in-house load L1 connected to the electrical panel 4 is configured to be supplied with either AC 200V or AC 100V via the first branch line 16.

  In addition, the first distribution board 4 is connected to a second power line 17 connected to the storage battery board 7 via the second distribution board 5 and a power conditioner 18 for photovoltaic power generation installed in the house. The third power supply lines 19 are drawn and wired. The second power supply line 17 and the third power supply line 19 are both three-wire systems, and can supply an alternating current of 200 V. One end of the second power supply line 17 is connected to the first branch line 16, and the first current transformer 15. The other end of the third power line 19 is connected to a connection point between the contract breaker 11 and the main breaker 12. In addition, the above-described solar interconnection breaker 13 is inserted and connected to the third power line 19.

  The solar cell 2 constitutes a photovoltaic power generation system 21 together with the power conditioner 18, converts sunlight into DC power, and sends it to the power conditioner 18. The power conditioner 18 has a function as a power converter that converts DC power from the solar battery 2 into AC power. The power conditioner 18 is connected to a third power supply line 19 for supplying AC 200V, and is provided with an insertion port (not shown) that enables AC 100V to be output independently. A power plug 23 connected to one end of a two-wire auxiliary power supply line 22 is attached to the insertion port, and the other end of the auxiliary power supply line 22 is connected to any one voltage line constituting the second power supply line 17. Connected to neutral point.

  The power conditioner 18 is provided with a power failure monitoring unit (not shown) that monitors whether power is normally supplied from the system S. As a result, during normal times when predetermined power is normally supplied from the system S, the power conditioner 18 supplies AC power to the first power supply line 8 via the third power supply line 19, and the power is supplied to the storage battery system 1 side. In addition, the surplus power is sent to the power system S to sell power to the power company. On the other hand, when the power supply from the power system S is interrupted, the power conditioner 18 outputs the power independently, and the auxiliary power line 22 In this configuration, AC power is supplied to the second power supply line 17.

  The second distribution board 5 includes main breakers 25 and 26, a circuit breaker 27, a branch breaker 28, a switching circuit 29 for maintenance, and the like as main components, and the second power line 17 and the auxiliary power line described above. 22 are wired to the second distribution board 5 respectively. Further, a main circuit breaker 25 is inserted and connected to the second power supply line 17, and a circuit breaker 27 is inserted and connected to the auxiliary power supply line 22.

  The second power line 17 is routed and wired from the second distribution board 5 installed indoors to the storage battery board 7 installed outdoors. In the second distribution board 5, in the middle of the second power supply line 17. A two-wire first power supply line 30 having one end connected thereto is wired, and a two-wire second power supply line 31 having one end connected to the middle of the second power supply line 17 in the storage battery panel 7 is also provided. The battery board 7 is routed to the second distribution board 5 and wired. The other end of the first power supply line 30 is connected to the second power supply line 31 in the second distribution board 5.

  The switching circuit 29 includes an operation body 32 that can be manually operated, and two contact points 33 and 34 that are linked to the operation body 32. The contact points 33 and 34 are connected to the first power supply line 30 and the second contact point. Each is connected to a power supply line 31. In addition, the main breaker 26 is inserted and connected between the connection point of the second feeder 31 and the other end of the first feeder 30. In the switching circuit 29 according to the present embodiment, the contact 33 is turned off and the contact 34 is turned on during normal use, while the contact 33 can be turned on and the contact 34 can be turned off by operating the operating body 32 in an emergency. .

  One end of a second branch line 35 with a branch breaker 28 inserted and connected to each other is connected to the other end of the second power supply line 31, and the other end of the second branch line 35 is backed up at the time of a power failure installed in a house. The in-house load L2 is connected as the target second load. Since each of the second branch lines 35 is a two-wire type, the load L2 in the house connected to the second distribution board 5 is configured to be supplied with only AC 100V via the second branch line 35. .

  The contract breaker 11, the main breaker 12, the solar interconnection breaker 13, and the branch breaker 14 incorporated in the first distribution board 4, the main breaker 25, the main breaker 26, and the circuit incorporated in the second distribution board 5. Both the breaker 27 and the branch breaker 28 have a function of interrupting the circuit when an overcurrent flows there. Accordingly, in the future, unless otherwise specified, each of these breakers 11 to 14 and 25 to 28 is assumed to be always on.

  A storage battery panel 7 constituting an outdoor unit of the storage battery system 1 is equipped with a secondary battery 38 that is a chargeable / dischargeable storage battery, and includes a secondary battery 38, a storage battery control unit (BMU) 39, and the like. In addition to the system 41, a power conditioner 42, a power failure switching unit 43, a maintenance switch 44, a fan 45, and the like are incorporated therein.

  The secondary battery 38 used in the present embodiment includes six storage battery modules MDL1 to MDL6 in which 12 lithium ion battery cells (not shown) connected in series are connected in parallel. The battery voltage of each battery cell is 2.3V DC, the terminal voltage of each storage battery module MDL1 to MDL6 is 27.6V DC (range 18V to 32.4V), and these storage battery modules MDL1 to MDL6 are connected in series. By connecting, the secondary battery 38 as a whole can take out a voltage of DC 166 V (range of 108 V to 194 V). However, the type of battery cell, connection form, and the like are not limited to those of this embodiment.

  Battery cell management modules CMU1 to CMU6 are provided in the storage battery modules MDL1 to MDL6, respectively. The battery cell management modules CMU1 to CMU6 send monitoring results such as battery voltage (charge amount and remaining amount) and temperature to the storage battery control unit 39 for each battery cell of the corresponding storage battery modules MDL1 to MDL6, and the storage battery control unit In response to the control signal from 39, the battery voltage of each battery cell is adjusted to an appropriate range (1.5 to 2.7 V DC in the above example). The storage battery modules MDL <b> 1 to MDL <b> 6 are inserted and connected to the DC lines 46 routed from the power conditioner 42 to the battery system 41, respectively.

  In addition, the battery system 41 is provided with a cutting machine 47, switches 48 and 49, and a current detector 50, respectively. The cutting machine 47 provided for maintenance is inserted and connected to a DC line 46 between a group of one of the storage battery modules MDL1 to MDL3 connected in series and a group of the other storage battery modules MDL4 to MDL6 connected in series. When the battery system 41 is maintained and inspected, the cutting line 47 is manually operated to cut the series line 46 so that an unexpected electric shock by the storage battery modules MDL1 to MDL6 can be prevented. Further, a detection signal indicating the state of the cutting machine 47 is sent to the storage battery control unit 39.

  The switches 48 and 49 are respectively positioned on the positive electrode side and the negative electrode side of the secondary battery 38 and are inserted and connected to the DC line 46. The current detector 50 detects the charging / discharging current of the secondary battery 38 in the battery system 41 and sends the detection signal to the storage battery control unit 39. The DC line 46 on the negative electrode side of the secondary battery 38 is used. Inserted and connected.

  The storage battery control unit 39 recognizes the state of the secondary battery 38 and performs control. Specifically, the storage battery control unit 39 receives each detection signal from the battery cell management modules CMU1 to CMU6, the cutting machine 47, and the current detector 50. In addition, a control signal is sent to each of the battery cell management modules CMU1 to CMU6 so that the secondary battery 38 is appropriately controlled, and the switches 48 and 49 are turned on during the normal operation of the secondary battery 38. A control signal is sent to each of the switches 48 and 49 so that the switches 48 and 49 are turned off when the secondary battery 38 is abnormal or inspected. The storage battery control unit 39 also recognizes the result of recognizing the state of the secondary battery 38 based on the detection signals from the battery cell management modules CMU1 to CMU6, the cutting machine 47 and the current detector 50, through the control line 51. It has a function of sending to the receiver 42.

  The above-described power conditioner 42 is routed and wired with the second power supply line 17 from the second distribution board 5, and in parallel with the second power supply line 17, a two-wire third power supply line 52. Is connected. Further, the power conditioner 42 includes a power conversion unit 53 that performs power conversion between the system S and the loads L1, L2 in the house and the secondary battery 38, a control board 54 that supplies a drive signal to the power conversion unit 53, An operation power supply unit 55 for supplying a predetermined operation voltage to the control board 54 and the like, and switching relays 56 and 57 inserted and connected to the second power supply line 17 and the third power supply line 52, respectively, are provided.

The power conversion unit 53 connects a DC / AC conversion circuit 61 connected to the second power supply line 17 side and a DC / DC conversion circuit 62 connected to the DC line 46 side in series, and a command signal from the control board 54 In response, a gate drive circuit 63 for supplying a predetermined pulse drive signal to a control terminal, ie, a gate, of a semiconductor switching element (not shown) constituting the DC / AC conversion circuit 61 and the DC / DC conversion circuit 62 is provided. Configured. DC / AC conversion circuit 61 as an inverter of the power converter unit 53, with the switching operation of the semiconductor switching elements built, the ac power from the second power supply line 17 is converted into direct current power DC / DC converter circuit Or a function of converting direct current power from the DC / DC conversion circuit 62 into alternating current power and sending it to the second power supply line 17. The DC / AC conversion circuit 61 as a converter of the power conversion unit 53 is suitable for charging the secondary battery 38 with the DC voltage from the DC / AC conversion circuit 61 in accordance with the switching operation of the built-in semiconductor switching element. It has a function of stepping down to a voltage level or boosting the DC voltage from the secondary battery 38 to a voltage level suitable for operating the residential loads L1 and L2.

  The operation power supply unit 55 includes a diode 64 and a control power supply circuit 65 as a DC / DC converter, and sends a DC voltage generated across the DC line 46 to the control power supply circuit 65 via the diode 64. The noise component 66 is removed through a noise filter 66 mounted on the storage battery board 7 and sent to automatic voltage regulators (AVR) 67 and 68, respectively. The control power supply circuit 65 supplies a DC voltage for operating the control board 54 normally to the control board 54 as an operation voltage. The automatic voltage regulators 67 and 68 are provided in the storage battery panel 7 with each part. DC12V and DC24V are generated for operating the power supply. In particular, the operating voltage of 12 V DC generated by the automatic voltage regulator 67 is supplied not only to the storage battery control unit 39 of the battery system 41 but also to the indoor controller 6 and the like via the operating voltage line 69. Yes.

  In addition, the operation power supply unit 55 includes an AC / DC conversion circuit 58, and has a function of converting the AC voltage generated on the second power supply line 17 into another operation voltage of, for example, DC 5V. Further, the second power line 17 is provided with another AC / DC conversion circuit 59 constituted by a transformer and a diode. Even when the operation of the storage battery system 1 is stopped, the second power line 17 A DC voltage is sent to the control power supply circuit 65 and the noise filter 66 via the AC / DC conversion circuit 59.

  The power conditioner 42 generates power by using a control signal transmitted from the controller 6 via the control line 71 and a signal recognizing the state of the secondary battery 38 transmitted from the storage battery control unit 39 via the control line 51. It is provided in the storage battery panel 7 as a charge / discharge control unit for controlling the drive of the conversion unit 53 and thus the charge / discharge of the secondary battery 38. Both the control signal from the controller 6 and the signal that recognizes the state of the secondary battery 38 from the storage battery control unit 39 are sent to the control board 54 mounted on the power conditioner 42, and an appropriate command signal based on these signals. Is supplied from the control board 54 to the gate drive circuit 63, and a pulse drive signal having a predetermined pulse conduction width is supplied from the gate drive circuit 63 to the DC / AC conversion circuit 61 and the DC / DC conversion circuit 62, respectively. The charging current to the secondary battery 38 or the discharging current from the secondary battery 38 is appropriately controlled. A smoothing capacitor 72 is connected between the DC / AC conversion circuit 61 and the DC / DC conversion circuit 62.

  In the storage battery panel 7, the control board 54 is inserted into the first current transformer 15 inserted and connected to the first power supply line 8, the second current transformer 73 inserted and connected to the second power supply line 17, and the second power supply line 31. Each detection signal from the connected third current transformer 74 is received, and the amount of current flowing through the first power supply line 8, the second power supply line 17, and the second power supply line 31 is monitored. The control board 54 is generated in the auxiliary power line 22 in addition to the first relay 75 that detects the presence or absence of the voltage generated in the second power line 17 as a component that outputs a detection signal for determining the occurrence of a power failure. The first switch 77 provided in the DC line 46, the second switch 79 provided in the auxiliary power line 22, and the second switch 79 have a function of receiving each detection signal from the second relay 76 that detects the presence or absence of voltage. The power supply line 17 and the second power supply line 31 are respectively connected to the maintenance switch 44 so that the switches 77 and 79 and the maintenance switch 44 can be individually controlled on and off. doing.

  In particular, when the control board 54 determines that a power failure has occurred based on the detection signal from the first relay 75, the control relay 54 switches the switching relay 56 from on to off, and at the same time switches the switching relay 57 from off to on. After the electric power stored in the electric power is passed through the third power supply line 52 instead of the second power supply line 17, it is supplied to the residential load L2 via the second power supply line 31, and one end of the second power supply line 31 is The contact of the power cut-off switching unit 43 inserted and connected to the second power supply line 17 on the system S side from the connection point is switched from on to off to connect the second power supply line 17 and the first power supply line 8 from the secondary battery 38 to each other. In order, it is configured to prevent reverse power flow in the grid S.

  The noise filter 66, the automatic voltage regulators 67 and 68, the second current transformer 73, the third current transformer 74, the first relay 75, the second relay 76, the first switch 77, the first switch, The two switches 79 are all mounted in the storage battery panel 7. In addition, a third relay 81 is mounted in the storage battery panel 7, and the fan 45 that forcibly air-cools the heat-generating components in the storage battery panel 7 is turned on / off by a control signal supplied from the control board 54 to the third relay 81. It is configured to control the operation.

  The controller 6 provided indoors is connected to the storage battery board 7 as a storage battery main body installed outdoors by wire by the operating voltage line 69 and the control line 71 described above. Although details of the controller 6 will be described later, the controller 6 is operated by the operating voltage from the operating voltage line 69 and is supplied to the control board 54 mounted on the power conditioner 42 of the storage battery panel 7 through the control line 71. It is configured to send a signal. In particular, in the present embodiment, while the charge signal is sent from the controller 6, a pulse drive signal is sent from the gate drive circuit 63 so as to charge the secondary battery 38 with a predetermined amount of current instructed by the charge signal. The power conversion unit 53 is operated, and a pulse drive signal is sent from the gate drive circuit 63 so that the secondary battery 38 discharges with a predetermined current amount instructed by the discharge signal while the controller 6 sends a discharge signal. Then, the power conversion unit 53 is operated. On the other hand, when neither the charge signal nor the discharge signal is sent from the controller 6, the pulse drive signal from the gate drive circuit 63 is not output, and the secondary battery 38 is not charged or discharged. .

  FIG. 2 shows a conceptual configuration of the storage battery system 1 in a normal state. In the figure, the photovoltaic power generation system 21 further includes a first switching contact 82 inserted and connected to the third power supply line 19 and a second switching contact 83 inserted and connected to the auxiliary power supply line 22. At the normal time, the first switching contact 82 of the solar power generation system 21 is turned on, while the second switching contact 83 is turned off, and the power failure switching unit 43 attached to the storage battery panel 7 is turned on. Therefore, the photovoltaic power generation system 21 outputs AC 200V to the first power supply line 8 through the third power supply line 19, and the load L1 in the house connected to the outlet of the first distribution board 4 together with the AC output from the commercial power system S. Then, it becomes possible to supply electric power to the load L2 in the house connected to the outlet of the second distribution board 5. At this time, AC 200V or AC 100V is supplied to the residential load L1 via the first power line 8 and the first branch line 16 in order, and the residential power L2 is supplied to the first power line 8. AC 100V is supplied through the second power supply line 17, the second power supply line 31, and the second branch line 35 in this order.

  Further, by controlling charging of the secondary battery 38 in the storage battery panel 7 at normal time, the power from the system S and the photovoltaic power generation system 21 is sequentially passed through the first power supply line 8 and the second power supply line 17. The secondary battery 38 can be charged. The surplus power from the solar power generation system 21 can be consumed and used for charging the secondary battery 38 and can also be supplied to the system S for sale.

  Further, by controlling the discharge of the secondary battery 38 in the storage battery panel 7 at normal time, the power stored in the secondary battery 38 is transferred to the residential loads L1 and L2 through the second power supply line 17 and the second feeder line 31. Can be supplied. In this case, a total of up to 3 kVA of power can be supplied from the secondary battery 38 including the AC 100V system and the AC 200V system.

  FIG. 3 shows a conceptual configuration of the storage battery system 1 during a power failure. When a power failure occurs, the first switching contact 82 of the photovoltaic power generation system 21 is turned off, while the second switching contact 83 is turned on, and the power failure switching unit 43 attached to the storage battery panel 7 is turned off. . Therefore, the load L1 in the house connected to the outlet of the first distribution board 4 becomes unusable, but the house connected to the outlet of the second distribution board 5 by controlling the discharge of the secondary battery 38 in the storage battery board 7. Only the load L2 can be supplied with a maximum of 2 kVA from the secondary battery 38 at 100 V AC. Moreover, the output of AC100V generated at the time of a power failure of the solar power generation system 21 is sent to the second power supply line 17 and the second power supply line 31 via the auxiliary power supply line 22, and the output is supplied to the residential load L2. And can be used to charge the secondary battery 38. The solar power generation system 21 in the present embodiment has an output capability of 1.5 kVA at the maximum, but reads the detection signals from the second current transformer 73 and the third current transformer 74 described above, and outputs them in the storage battery panel 7. By controlling the charging current of the secondary battery 38, for example, 500 VA of the secondary battery 38 can be used for charging the secondary battery 38 and the remaining 1 kVA can be consumed by the residential load L 2. Therefore, it is possible to charge the secondary battery 38 by using the photovoltaic power generation system 21 while using the residential load L2 during a power failure.

  Next, the external configuration of the controller 6 installed indoors will be described with reference to FIGS. 4 and 5. The controller 6 includes a casing 84 that forms a substantially rectangular box-shaped outer shell, and a door 85 that covers a lower front portion of the casing 84, and the upper end of the door 85 is a pair of left and right provided at the lower end of the casing 84. The door 85 is pivoted about the hinge 86 so as to be openable and closable with respect to the housing 84. The controller 6 includes, for example, a display unit 87 such as a liquid crystal display, a first operation unit 88 including a plurality of buttons 88A to 88D, and a second unit including a plurality of buttons 89A to 89F different from the first operation unit 88. The display unit 87 and the first operation unit 88 are disposed on the upper front portion of the case 85 that is always exposed regardless of whether the door 85 is opened or closed, while the second operation unit 89 closes the door 85. It is arranged at the lower front part of the case 85 covered with the door 85.

  In addition to the operation mode screen mainly showing the time shown in FIGS. 4 and 5, the remaining amount of the secondary battery 38, the operation state of the storage battery system 1, the display unit 87 includes a plurality of menus. From this, a menu selection screen for selecting a specific menu, a setting screen for setting various parameters, a transition graph screen showing charging / discharging transition of the secondary battery 38, and the like are selectively displayed. Incidentally, the display unit 87 in FIG. 4 and FIG. 5 shows one display form in the recommended mode among the operation modes in the normal time, and here, a mode display unit 87A for displaying an operation mode name, which will be described later, The current time display unit 87B that displays the current time, the remaining amount display unit 87C that displays the actual remaining amount corresponding to the voltage across the terminals of the secondary battery 38, and the remaining battery level storage unit 134 that will be described later. A remaining battery set value display portion 87D for displaying the remaining battery charge setting value, an operation display portion 87E for displaying the charge / discharge status of the secondary battery 38, and a charge / discharge time / time indicator. A discharge time display part 87F is provided.

  The first operation unit 88 is mainly composed of one or a plurality of buttons 88A to 88D for indicating a specific operation mode with a relatively high operation frequency. Specifically, a recommendation button 88A and an assist button are provided on the left side of the display unit 87. 88B is arranged in parallel, and a charging button 88C and a discharging button 88D are arranged in parallel on the right side of the display unit 87. On the other hand, the second operation unit 89 includes one or a plurality of buttons 89A to 89F that are relatively infrequently operated and have a large influence due to an erroneous operation. Specifically, the second operation unit 89 includes an upward button 89A, a determination button 89B, The button 89C includes a menu button 89D, a return / cancel button 89E, and a run on / off button 89F.

  In this embodiment, push-button type buttons 88A to 88D and buttons 89A to 89F are shown as input devices. However, a capacitance switch used in an electronic information device terminal such as a smartphone, a display unit 87, and the like An integrated touch panel or the like may be used instead.

  The buttons 88A to 88D of the first operation unit 88 are provided at positions that can be operated without opening the door 85, and the buttons 89A to 89F of the second operation unit 89 can be operated unless the door 85 is opened. It is provided at a position where it cannot. This is because the buttons 88A to 88D of the first operation unit 88 have a larger shape than the buttons 89A to 89F of the second operation unit 89. It becomes a factor which can improve the operativity and can avoid the stop of the electrical storage system 1 by misoperation together.

  Particularly in this embodiment, the charging button 88C that is pushed when the secondary battery 38 is charged and the discharge button 88D that is pushed when the secondary battery 38 is discharged do not open the door 85. Even if it can be operated. In this way, the user can immediately charge or discharge the secondary battery 38 by operating the charge button 88C or the discharge button 88D without the operation of opening the door 85 one by one. On the other hand, the operation on / off button 89F that is pushed when the operation of the storage battery system 1 is started or stopped is arranged so that it cannot be operated unless the door 85 is opened. By doing in this way, it becomes possible for a user not to stop the operation of the storage battery system 1 easily, and to reliably charge and discharge the secondary battery 38 when necessary.

  6 and 7 show IT adapters 91 and 92 that enable communication with a HEMS (Home Energy Management System) device such as the solar power generation system 21. One of these IT adapters 91 and 92 is attached to the controller 6 as a connection terminal with a wireless or wired wireless communication means (not shown). Each of the IT adapters 91 and 92 has a substantially rectangular box shape and is provided with a connector receiver 93 that allows electrical connection with the controller 6 on one side. The IT adapter 91 includes a LAN terminal 94 as a connection unit for a wired LAN (Local Area Network). The wireless IT adapter 92 connected to a wireless communication means by wireless can be used instead of the LAN terminal 94 described above. A transmitter / receiver 95 for wireless (for example, Bluetooth: registered trademark) is incorporated. Since the IT adapter 91 is provided with the LAN terminal 94, the IT adapter 91 is formed in a shape that is thicker than the IT adapter 92.

  8 and 9 show a wired type IT adapter 91 attached to the controller 6. In each of these drawings, the casing 84 of the controller 6 described above covers a bottomed case 96 that forms the front and side surfaces of the outer shell of the controller 6, the opening of the case 96, and the back of the outer shell of the controller 6. A control board 98 that is electrically connected to the display unit 87, the first operation unit 88, the second operation unit 89, and the like is incorporated in the housing 84. In addition, a connector receiver 99 is provided on the control board 98 inside the housing 84. The IT adapter 91 is attached to the outer surface of the cover 97 located on the back surface of the controller 6, and by connecting a cable 100 with a connector between the connector receiver 93 of the IT adapter 91 and the connector receiver 99 of the control board 98, the IT adapter 91 Bidirectional signal transmission is enabled between the adapter 91 and the controller 6. The cover 97 is provided with a long hole 101, and a connector receiver 93 provided outside the housing 84 and a connector provided inside the housing 84 by inserting the cable 100 with a connector through the long hole 101. An electrical connection with the receptacle 99 is realized.

  In order to connect the IT adapter 91 to another device such as a personal computer, a LAN cable 102 connected to a network (not shown) may be inserted into a LAN terminal 94 exposed to the outside of the housing 84. By doing so, various data related to the storage battery system 1 can be exchanged between the controller 6 of the storage battery system 1 and a device such as a personal computer connected to the network. Specifically, for example, the same display and operation functions as those of the controller 6 can be provided not only to devices in the local area but also to devices outside the local area connected through the Internet.

  Since the IT adapter 91 is provided with a thick LAN terminal 94, if the controller 6 is to be built in the controller 6, the thickness of the controller 6 must be increased. However, the thickness of the controller 6 can be reduced by installing the IT adapter 91 on the back surface of the controller 6.

  On the other hand, FIG. 10 shows a wireless type IT adapter 92 attached to the controller 6. 8, the configuration of the controller 6 is the same as that shown in FIGS. 8 and 9, but the IT adapter 92 is not on the back surface of the controller 6 and is not exposed to the outside of the controller 6. It is built in the storage space 104 of the IT adapter 92 formed in advance. In the housing 84, a cable 100 with a connector is connected between the connector receiver 93 of the IT adapter 92 and the connector receiver 99 of the control board 98, and bidirectional signals are transmitted between the IT adapter 92 and the controller 6. Transmission is possible.

  In order to connect the IT adapter 92 to another device such as a personal computer, for example, a Bluetooth communication adapter is connected to the device internally or externally, so that the controller 6 of the storage battery system 1 is connected to the other device. Thus, various data related to the storage battery system 1 can be exchanged. Also in this case, for example, other devices can have the same display and operation functions as the controller 6.

  The IT adapter 92 incorporating the wireless transceiver 95 does not need to be provided with another LAN terminal 94, and can be formed thinner. The storage space 104 provided as a storage unit for the IT adapter 92 is provided adjacent to the connector receiver 99 that is a connection unit with the IT adapter 92, and the IT adapter 92 is provided in the storage space 104. In addition to incorporating the IT adapter 92 in the storage space 104 of the controller 6, the connector receiver 99 is disposed in the vicinity of the IT adapter 92, so that the cable 6 with a connector as a connection line is not unnecessarily lengthened. Can be made thinner. More preferably, the connector receiver 93 on the IT adapter 92 side is disposed opposite to the connector receiver 99 on the controller 6 side, so that the length of the cable with connector 100 is minimized and the controller 6 is made compact. be able to.

  The connector receptacle 99 of the controller 6 has a structure that is detachable from the connector-equipped cable 100, and is configured to connect any one of the IT adapters 91 and 92 via the connector-equipped cable 100. That is, the connector receiver 99 is used in common for both the IT adapters 91 and 92, and the number of parts can be reduced, and the wired type IT adapter 91 is attached to the outside of the controller 6. Thinning can be achieved.

  Next, the internal configuration of the controller 6 serving as the main control unit of the storage battery system 1 will be described with reference to FIGS.

  FIG. 11 is a block diagram showing an outline of the configuration related to the control system of the controller 6, and 121 is a controller control means including a CPU and an input / output circuit mounted on the control board 98 inside the controller 6. The controller control unit 121 is connected to the control board 54 mounted on the power conditioner 42 via the control line 71 in addition to the display unit 87, the first operation unit 88, and the second operation unit 89 described above. . In addition, the controller control unit 121 follows a predetermined processing procedure with a time measuring unit 122 as a time counter for measuring the current time, various parameters (setting values) necessary for operating the storage battery system 1, and the controller control unit 121. And a storage unit 123 serving as a memory for storing a program to be arithmetically processed. The timer unit 122 and the storage unit 123 are mounted on the control board 98 together with the controller control unit 121.

  A door opening / closing detection unit 124 detects opening / closing of the door 85 of the controller 6. The door opening / closing detection unit 124 includes various sensors such as a mechanical type, an optical type, and a magnetic type, and sends an electrical detection signal corresponding to the opening / closing of the door 85 to the controller control unit 121. The controller control means 121 is configured to accept an input of an operation signal from the second operation unit 89 only when the door open / close detection unit 124 detects a state where the door 85 is opened. In the future, unless otherwise specified, it is assumed that the controller control means 121 accepts an operation signal input from the second operation unit 89 when the door 85 is opened.

  The controller control unit 121 reads out from the program storage area of the storage unit 123 and functions as a control sequence of a program to be processed and executed as a parameter setting unit 125, a charge / discharge control instruction unit 126, a display unit control unit 127, Each is equipped. In addition to variably adjusting the current time by the time measuring unit 122, the parameter setting unit 125 stores and sets various parameters in the parameter storage area of the storage unit 123. The charge / discharge control instruction unit 126 sends the above-described charge signal and discharge signal to the control line 71 based on parameters stored in the storage unit 123 and various information transmitted from the control board 54 via the control line 71. Then, the power conditioner 42 is controlled so that the power conditioner 42 that controls charging / discharging of the secondary battery 38 operates appropriately. The display unit control unit 127 controls the display form on the display unit 87 to display the above-described operation mode screen, menu selection screen, setting screen, and the like.

  FIG. 12 shows a more detailed configuration related to the parameter setting means 125. In the drawing, the storage unit 123 of the present embodiment includes a reservation for charging / discharging start and end of charging / discharging of the secondary battery 38, that is, timer time, turning on / off of each timer function, charging time of the secondary battery 38, The discharge time of the secondary battery 38, the remaining amount of the secondary battery 38, and various initial setting values at the time of installation of the storage battery system 1 are stored and held as the above-described parameters, respectively. More specifically, the parameter storage area of the storage unit 123 stores the charging start time and charging end time of the secondary battery 38, and the discharging start time and discharging end time of the secondary battery 38, and each timer. A timer time storage unit 131 for storing the on / off state of the function, a charging time storage unit 132 for storing the charging time of the secondary battery 38, a discharging time storage unit 133 for storing the discharging time of the secondary battery 38, A battery remaining amount storage unit 134 that stores an upper limit charge remaining amount (full charge amount) at the time of charging the secondary battery 38 and a lower limit discharge remaining amount (remaining amount set value) at the time of discharging, and at the time of installation of the storage battery system 1 And an initial setting value storage unit 135 for storing various initial setting values.

  On the other hand, the parameter setting unit 125 corresponds to the timer time setting unit 141 corresponding to the timer unit 122 and the timer time storage unit 131, the charging time setting unit 142 corresponding to the charging time storage unit 132, and the discharging time storage unit 133. A discharge time setting unit 143, a remaining battery level setting unit 144 corresponding to the remaining battery level storage unit 134, and an initial set value setting unit 145 corresponding to the initial set value storage unit 135.

  The timer time storage unit 131 preferably includes a recommended timer time storage unit 131A that stores a preset discharge start time and discharge end time in addition to a preset charge start time and charge end time, and an arbitrary charge start Aside from the first timer time storage unit 131B and the first timer time storage unit 131B, which store the time and the charge end time, and store the arbitrary discharge start time and discharge end time, the arbitrary charge start time and charge end Whether or not to enable the timer function for each of the first timer and the second timer, and the second timer time storage unit 131C that stores the time and the arbitrary discharge start time and discharge end time And a timer function storage unit 131D for storing the state. In particular, regarding the timer time, each time stored and set in the first timer time storage unit 131B and the second timer time storage unit 131C can be read from and written to the controller control unit 121. Each time set to be stored in the storage unit 131A can be read from the controller control unit 121 but cannot be written. Further, the on / off state stored in the other timer function storage unit 131D, the charging time stored in the charging time storage unit 132, the discharging time set in the discharging time storage unit 133, and the remaining battery level Both the remaining amount set value stored and set in the storage unit 134 and the initial set value stored and set in the initial set value storage unit 135 can be read and written.

  The parameter setting means 125 operates the second operation unit 89 with the door 85 opened, thereby providing a timer time setting unit 141, a charge time setting unit 142, a discharge time setting unit 143, a remaining battery level setting unit 144, and an initial value. Any one of the set value setting units 145 operates. In relation to these operations, the display control unit 127 controls the display mode of the display unit 87 so that the parameters stored in the storage unit 123 can be set and changed. Specific parameter setting procedures and the display form of the display unit 87 associated therewith will be described in detail later.

  FIG. 13 shows a more detailed configuration related to the charge / discharge control instruction means 126. In the figure, the charge / discharge control instruction means 126 of the present embodiment corresponds to each operation mode that can be executed by the storage battery system 1, a recommended mode control instruction unit 151, a power failure mode control instruction unit 152, and a charge mode control. An instruction unit 153, a discharge mode control instruction unit 154, an assist mode control instruction unit 155, and a timer mode control instruction unit 156 are provided.

  The recommendation mode control instruction unit 151 operates when the storage battery system 1 is started or when the recommendation button 88A is pressed, and the charge start, charge end, discharge start, and discharge end read from the recommendation timer time storage unit 131A. By comparing each time with the current time taken in from the time measuring unit 122, a charge signal or discharge is sent to the control board 54 of the power conditioner 42 via the control line 71 so that the secondary battery 38 is charged or discharged. It has a function to send a signal. In addition, the recommended mode control instruction unit 151 takes in information on the actual remaining amount (remaining charge amount and remaining discharge amount) of the secondary battery 38 from the control board 54 side during the transmission of the charge signal and the discharge signal, When the actual remaining amount of the battery 38 reaches a predetermined full charge amount or a predetermined remaining amount setting value read from the battery remaining amount storage unit 134, the battery 38 is also provided with a function of stopping transmission of a charge signal and a discharge signal.

  The power failure mode control instruction unit 152 operates when receiving information indicating that a power failure of the system S has occurred via the control line 71 from the control board 54 side. Similarly, the photovoltaic power generation taken in via the control line 71 The secondary battery 38 has a function of sending a charge signal or a discharge signal to the control board 54 so that the secondary battery 38 is charged or discharged according to the output power of the system 21.

  The charging mode control instruction unit 153 operates when the charging button 88C is pressed, and is controlled so that the secondary battery 38 performs charging based on the setting condition of the charging time read from the charging time storage unit 132. It has a function of sending a charge signal to the control board 54 of the power conditioner 42 via the line 71. In addition, the charging mode control instruction unit 153 according to the present embodiment sets the charging time set and stored in the charging time storage unit 132 from when the charging button 88C is pressed as a plurality of charging patterns with different charging rates for the secondary battery 38. Normal charging pattern for charging the secondary battery 38 only, and until the actual remaining charge amount of the secondary battery 38, that is, the charge amount, reaches the predetermined full charge amount set and stored in the battery remaining amount storage unit 134. A control instruction function based on a quick charge pattern for charging the battery 38 is provided.

  The discharge mode control instruction unit 154 operates when the discharge button 88D is pressed, and controls the secondary battery 38 to discharge based on the discharge time setting condition read from the discharge time storage unit 132. It has a function of sending a discharge signal to the control board 54 of the power conditioner 42 via the line 71.

  The assist mode control instruction unit 155 operates when the assist button 88B is pressed. The power conditioner is connected via the control line 71 so that the secondary battery 38 is discharged for a predetermined time after the assist button 88B is pressed. It has a function of sending a discharge signal to 42 control boards 54. When the assist button 88B is operated before a predetermined time (for example, 30 minutes) has elapsed, the assist mode control instruction unit 155 here accepts the operation of the assist button 88B and starts sending a discharge signal, and from there for a predetermined time. The secondary battery 38 may be discharged by continuing to send out a discharge signal (for example, for 1 hour), or the assist button 88B is activated using the current time taken from the time measuring unit 122 as shown in FIG. The operated time is stored in the operation time storage unit 136 of the storage unit 123 each time, and the secondary battery 38 may be discharged when the predetermined time is reached based on the operation time stored in the operation time storage unit 136. Good.

  In addition, the assist mode control instructing unit 155 measures the current value used in the home (in the residential premises) by the first current transformer 15 as a detecting unit, and from here to the assist mode control instructing unit 155 via the control board 54. The secondary battery 38 may be discharged after the used current value to be sent exceeds a predetermined value, or within a predetermined time after pressing the assist button 88B, or by a preset time, the first current transformer 15. The secondary battery 38 may be discharged when the use current value detected in (1) exceeds a predetermined value. In addition, the initial set value storage unit 135 previously stores and stores parameters such as contract power at home and contract current (contract ampere). The contract power amount is read from the parameters, and the contract power is read from the secondary battery 38. The assist mode control instruction unit 155 may send a discharge signal so that the power exceeding the amount can be discharged. Further, the assist mode control instruction unit 155 has a function of sending a discharge signal so that the secondary battery 38 can discharge 3 kVA, which is a normal rated output, when the above-described use current value is larger than a predetermined value. ing.

  The timer mode control instruction unit 156 operates when the timer function is enabled by the operation of the second operation unit 89, and in this embodiment, when either or both of the first timer and the second timer are enabled. By comparing each time of charge start, charge end, discharge start and discharge end read from the first timer time storage unit 131B and / or the second timer time storage unit 131C with the current time taken from the time measuring unit 122 The secondary battery 38 has a function of sending a charge signal or a discharge signal to the control board 54 of the power conditioner 42 via the control line 71 so that the secondary battery 38 is charged or discharged.

  The charge / discharge control instruction means 126 is operated by the first operation unit 88 or the second operation unit 89, and the recommended mode control instruction unit 151, the power failure mode control instruction unit 152, the charge mode control instruction unit 153, and the discharge mode control instruction unit 154. Any one of the assist mode control instruction unit 155 and the timer mode control instruction unit 156 is configured to operate. In relation to these operations, the display control unit 127 controls the display form of the display unit 87 corresponding to each operation mode.

Thus, recommended mode control instruction unit 151 and the timer mode control instruction unit 156 is a timer function of the same charge and discharge, as the operation of each other do not interfere, i.e., a recommended mode control instruction unit 151 operates the recommendation key 88 A When enabled, the timer mode control instruction unit 156 is disabled and does not operate. Conversely, when the second operation unit 89 is operated to set the timer mode control instruction unit 156 to be effective, the recommended mode control is performed. The instruction unit 151 is configured to be disabled and not operate. Also, at the initial startup when the operation of the storage battery system 1 is started by the operation on / off button 89F of the second operation unit 89, the recommendation mode control instruction unit 151 that is a function when the recommendation button 88A is pressed is automatically set. The charge / discharge control means 126 is configured to be set.

  Next, the setting procedure of each parameter mentioned above is demonstrated with reference to each display form of the display part 87 shown in FIGS.

  When the menu button 89D is pushed while the door 85 of the controller 6 is opened as shown in FIG. 4, the controller control means 121 accepts an operation signal from the menu button 89D and displays the menu selection screen shown in FIG. As described above, the display control unit 127 controls the display unit 87. In practice, the menu selection screen in FIG. 14 displays a menu selection display portion 87G indicating that the menu is being selected, a current time display portion 87B that displays the current time read from the timekeeping portion 122, and a menu list. A menu list display portion 87H is arranged at an appropriate position in the display portion 87.

  The menu list display portion 87H has an upward direction in addition to the “transition graph”, “timer setting”, “charge time setting”, “discharge time setting”, “battery remaining amount setting”, and “time setting” shown in FIG. By pressing the button 89A or the down button 89C, for example, an “initial value setting” menu (not shown) can be displayed side by side. In FIG. 14, only the “timer setting” menu is displayed in a black and white reversed state different from the other menus. However, when the above-described upward button 89A is pressed, the reversed state display moves upward. On the contrary, when the down button 89C is pushed, the display in the reverse state moves upward. Then, when the determination button 89B is pushed in a state where the display of the specific menu is reversed, the menu displayed in the reversed state is selected, and the screen shifts to another screen shown below.

  FIG. 15 shows a display form of the display unit 87 when the “time setting” menu is selected. When the “time setting” menu is selected, the display unit control means 127 displays a setting screen for setting the current time as shown in FIG. 15 on the display unit 87 in order to adjust the current time by the timer setting time unit 141. Display. Actually, the current time setting screen in FIG. 15 displays the current state read from the setting state display unit 87I indicating the setting state (in this case, “date and time setting”) and the time measuring unit 122. A current time display portion 87B and a current time setting display portion 87J for displaying the date and time to be set are arranged at appropriate positions in the display portion 87.

  The current time setting display section 87J displays numbers corresponding to the year, month, day, hour, and minute, and one of them is displayed in an inverted state. Each time the enter button 89B is pressed, the display in the reverse state moves in the order of the year, month, day, hour, and minute. The numbers displayed in the reverse state are pushed by pressing the up button 89A or the down button 89C. Increase or decrease each time you operate. Then, when the number corresponding to the minute is displayed in an inverted state and the enter button 89B is pressed from there, the date and time displayed on the current time setting display portion 87J is the timer time setting portion 141 as the current time at that time. Is stored in the timer unit 122.

  FIG. 16 shows a display form of the display unit 87 when the “timer setting” menu is selected. When the “timer setting” menu is selected, in order to set each time of the timer by the timer time setting unit 141, the display unit control means 127 displays a setting screen for timer setting as shown in FIG. To display. In particular, in the present embodiment, the storage unit 123 is provided with areas (first timer time storage unit 131B and second timer time storage unit 131C) for storing times related to a plurality of timer functions. 16 ", a timer setting screen is displayed that allows selection of which timer to set the time as shown in FIG. 16A. When a specific timer is selected here, FIG. As shown in B), a timer time setting screen for enabling setting of the time for the selected timer is displayed.

  Actually, in the timer setting screen in FIG. 16A, in addition to the setting state display portion 87I and the current time display portion 87B, a timer selection display portion 87K that displays a selectable timer is provided in the display portion 87. Placed in the right place. In addition, on the timer time setting screen in FIG. 16B, in addition to the setting state display portion 87I and the current time display portion 87B, the charge start time, the charge end time, the discharge start time, and the discharge end time to be set. A timer time setting display part 87L that indicates the hour and minute in numbers and an alert display part 87M that prompts attention and warning in setting are arranged at appropriate positions in the display part 87.

  A timer selection display portion 87K in FIG. 16A is a “timer 1” corresponding to a first timer and a “timer 2” corresponding to a second timer as two timers by which the user can arbitrarily set the timer time. Is displayed in letters, and one of them is displayed in reverse video. The display of the inversion state is moved each time the up button 89A or the down button 89C is pressed, and a character (for example, “timer 1”) corresponding to a specific timer is displayed in the inversion state and determined from there. When button 89B is pressed, a timer time setting screen related to “timer 1” shown in FIG. 16B appears.

  When the display shifts to the display in FIG. 16B, the timer time setting display unit 87L displays the charge start time, the charge end time, the discharge start time, and the discharge end time read from the first timer time storage unit 131B by the timer time setting unit 141. Are respectively displayed as numbers, and the corresponding numbers are displayed in an inverted state at the first charge start time. Here, when the up button 89A or the down button 89C is pushed, the number displayed in the reversed state is increased or decreased, and when the enter button 89B is pushed, the number is reversed to the number corresponding to the next charging start time. The status display moves. In the same manner, if the up button 89A or the down button 89C is pushed as necessary, the number corresponding to the charge start time can be changed, and if the enter button 89B is pushed, the next charging is completed. The highlighted display moves to the number corresponding to the time.

  Thus, every time the determination button 89B is pressed after appropriately operating the up button 89A or the down button 89C, the time of the charge start time → the minute of the charge start time → the hour of the charge end time → the minute of the charge end time → the discharge The display of the inversion state moves in the order of the start time → the charge start time → the discharge end time → the discharge end time. In the middle of this series of operations, the timer time setting unit 141 sets the timer time. It is determined whether or not each scheduled time displayed on the setting display unit 87L can be stored in the first timer time storage unit 131B.

  Specifically, when the time from the charging start time to the charging end time displayed on the timer time setting display unit 87L overlaps with the time from the discharging start time to the discharging end time, the timer time setting unit 141 It is determined that the time displayed on the timer time setting display portion 87L cannot be set and stored in the first timer time storage portion 131B, the alert control portion 87M is displayed on the display portion 87 by the display portion control means 127, and the enter button 89B is pressed. Does not advance to the next highlighted display when pressed. FIG. 16B shows such a state, and the user inevitably uses the up button 89A or the down button 89C to change the discharge start time from, for example, an incorrect “06” to “13”. It will be corrected correctly.

  On the other hand, if the time from the charging start time to the charging end time displayed on the timer time setting display portion 87L does not overlap with the time from the discharging start time to the discharging end time, the timer times in the order described above. The display of the reversed state in the setting display portion 87L can be advanced. When the determination button 89B is pressed after displaying the minute of the discharge end time in the inverted state, the timer time setting unit 141 uses each time displayed on the timer time setting display unit 87L as the timer setting time as the first timer time. The storage unit 131B is overwritten and updated, and the display on the display unit 87 is returned to the timer setting screen of FIG. Here, when the character “timer 2” is displayed in an inverted state and the determination button 89B is pressed, each time displayed on the timer time setting display portion 87L in the same manner is used as the timer setting time in the second timer time storage portion. 131C can be overwritten and updated, and the display on the display unit 87 similarly returns to the timer setting screen of FIG.

  In the middle of the series of operations, when the charging start time and the charging end time displayed on the timer time setting display unit 87L are the same time, these times are used as the first timer time storage unit 131B and the second timer. Although stored in the time storage unit 131C as the set time, the timer mode control instruction unit 156 determines that charging of the secondary battery 38 at the timer time is not performed (invalidated). Similarly, when the discharge start time and the discharge end time displayed on the timer time setting display unit 87L are the same time, these times are set in the first timer time storage unit 131B and the second timer time storage unit 131C. However, the timer mode control instructing unit 156 determines that the secondary battery 38 is not discharged at the timer time itself. As described above, the user can easily set the charging and discharging at the timer time to be invalid as necessary, so that the secondary battery can be operated at the time desired by the user by operating another charging button 88C or discharging button 88D. 38 can be freely charged and discharged.

  As a feature of the timer time setting screen in FIG. 16B, the timer time is set as one screen displayed on the display unit 87 including a charge start time, a charge end time, a discharge start time, and a discharge end time. If the time from the charge start time to the charge end time and the time from the discharge start time to the discharge end time overlap, the timer time for both the charge time and the discharge time Cannot be set. In this way, the user can immediately obtain information on the time related to charging / discharging in one timer function on one screen, and even if an incorrect time is set, the incorrect time is set as it is. Therefore, the time can be corrected at the same time for both charging and discharging, and an efficient correction regarding the start time and end time of charging / discharging becomes possible.

  FIG. 17 shows a display form of a timer switching setting screen displayed on the display unit 87 under the “timer setting” menu hierarchy. When a specific button of the second operation unit 89 is pushed on the setting screen for timer setting shown in FIG. 16, the display unit control means 127 displays a timer switching setting screen as shown in FIG. Display.

  Actually, on the timer switching setting screen in FIG. 17, in addition to the setting state display unit 87I and the current time display unit 87B, the charging start time of the first timer stored and stored in the first timer time storage unit 131B, Along with the charge end time, the discharge start time, the discharge end time, the charge start time, the charge end time, the discharge start time, and the discharge end time of the second timer stored and stored in the second timer time storage unit 131C. A timer on / off state display part 87N for displaying the on / off state and the on / off state of the second timer is arranged at a suitable position in the display part 87.

  The timer on / off state display part 87N in FIG. 17 is a “timer corresponding to the on state of the first timer so that the user can use the two timer functions individually or both independently. “1 ON”, “Timer 1 OFF” corresponding to the first timer OFF state, “TIMER 2 ON” corresponding to the second timer ON state, “TIMER 2 OFF” corresponding to the second timer OFF state "Is displayed as a character, and one of them is displayed in an inverted state. The display of the inversion state is moved each time the up button 89A or the down button 89C is pushed, and a specific character (for example, “Timer 1 ON”) is displayed in the inversion state. When pressed, each of the first timer and the second timer can be set to valid or invalid corresponding to the display of the inverted state, and can be overwritten and updated in the timer function storage unit 131D.

  Here, when both the first timer and the second timer are set to be usable, the charging time set by the first timer, that is, the time from the charging start time to the charging end time, or the discharging time, that is, the discharging start time. If the time from the discharge time to the discharge end time overlaps the charge time or discharge time set by the second timer, the timer mode control instruction unit 156 gives priority to the charge time and discharge time of the first timer, The power conditioner 42 performs charge / discharge control for the secondary battery 38.

  FIG. 18 shows a display form of the display unit 87 when the “charge time setting” menu is selected. When the “charging time setting” menu is selected by the second operation unit 89 on the menu selection screen shown in FIG. 14 described above, the display control unit 127 sets the charging time by the charging time setting unit 142. A setting screen for setting the charging time as shown in FIG. 18 is displayed on the display unit 87. Actually, on the setting screen of the charging time in FIG. 18, in addition to the setting state display portion 87I and the current time display portion 87B, the charging time setting display portion 87O for displaying the charging time to be set is displayed on the display portion. 87 in place.

  The charging time setting display unit 87O in FIG. 18 displays characters and numbers “1 hour”, “2 hours”, “3 hours”, “4 hours”, and “full charge” as a plurality of settable charging times. One of them is displayed in an inverted state. "Full charge" in this is for setting the charging time until the secondary battery 38 is almost fully charged. Therefore, the setting of the charging time here includes not only the determined time but also the setting of an indefinite time until the secondary battery 38 reaches a certain state. The display of the reverse state moves each time the up button 89A or the down button 89C is pressed, and a specific character or number (for example, “2 hours”) is displayed in the reverse state, and then the enter button 89B is displayed. When is pressed, the charging time is set to 2 hours corresponding to the reverse state, and this can be overwritten and updated in the charging time storage unit 132.

  FIG. 19 shows a display form of the display unit 87 when the “discharge time setting” menu is selected. In the menu selection screen shown in FIG. 14 described above, when the menu for “setting discharge time” is selected by the second operation unit 89, the display unit control means 127 is used to set the discharge time by the discharge time setting unit 143. A setting screen for setting the discharge time as shown in FIG. Actually, on the discharge time setting screen in FIG. 19, in addition to the setting state display portion 87I, the current time display portion 87B, and the alert display portion 87M, the discharge time setting display for displaying the discharge time to be set. The part 87P is disposed at an appropriate position in the display part 87.

  The discharge time setting display section 87P in FIG. 19 displays characters and numbers “1 hour”, “2 hours”, “3 hours”, “4 hours”, and “used up” as a plurality of settable discharge times. One of them is displayed in an inverted state. “Use up” in this is for setting the discharge time until the remaining amount of the secondary battery 38 becomes almost empty. Therefore, the setting of the discharge time here includes not only the determined time but also the setting of an indefinite time until the secondary battery 38 reaches a certain state. The display of the reverse state moves each time the up button 89A or the down button 89C is pressed, and a specific character or number (for example, “2 hours”) is displayed in the reverse state, and then the enter button 89B is displayed. When is pressed, the discharge time is set to 2 hours corresponding to the display of the reverse state, and this can be overwritten and updated in the discharge time storage unit 133.

  FIG. 20 shows a display form of the display unit 87 when the “battery remaining amount setting” menu is selected. When the “remaining battery level setting” menu is selected by the second operation unit 89 on the menu selection screen shown in FIG. 14, the display unit control is performed in order to set the remaining battery level setting value by the remaining battery level setting unit 144. The means 127 causes the display unit 87 to display a setting screen for setting the remaining amount of the secondary battery 38 as shown in FIG. Actually, on the battery remaining amount setting screen in FIG. 20, the setting state display portion 87I, the current time display portion 87B, the remaining amount display portion 87C indicating the remaining amount of the secondary battery 38 at the present time, In addition to the set remaining amount display portion 87D indicating the remaining amount setting value of the secondary battery 38 stored and saved in the remaining battery amount storage portion 134, the remaining amount displaying the remaining amount setting value of the secondary battery 38 to be set is displayed. The quantity setting display part 87Q is arranged at a proper position in the display part 87.

  The remaining amount setting display section 87Q in FIG. 20 displays “maximum”, “level 5”, “level 4”, “level 3”, “level 2”, “level 1” as a plurality of remaining amount setting values that can be set. In addition, letters and numbers “level 0” (not shown) are displayed here, and one of them is displayed in an inverted state. Among these, “maximum” means a remaining amount set value larger than “level 5”, and “level 0” is almost empty state less than “level 1” (however, it is not completely 0 and the secondary battery 38 is not completely zero). The remaining amount setting value (corresponding to the use lower limit value). The display of the reverse state is moved each time the upward button 89A or the downward button 89C is pressed, and a specific character or number (for example, “level 5”) is displayed in the reverse state. When is pressed, the remaining amount setting value of the secondary battery 38 is set to a numerical value corresponding to “level 5”, and this can be overwritten and updated in the remaining battery amount storage unit 134.

  Particularly, here, the remaining amount setting value can be set from a plurality of displays by the second operation unit 88 while viewing the display unit 87. The display unit 87 is configured to simultaneously display the actual remaining amount of the secondary battery 38 and the set remaining amount set value on the remaining amount display unit 87C and the set remaining amount display unit 87D. The set value of the remaining amount of the secondary battery 38 and the actual remaining amount of the secondary battery 38 at the present time can be understood at a glance from the display from the display unit 87 inside the controller 6. In addition, the structure which displays the remaining amount display part 87C and the setting remaining amount display part 87D simultaneously is provided also in the display form of FIGS. 21-26 mentioned later.

  Further, in the discharge time setting screen of FIG. 19, an alert display portion 87M of the characters “discharge to the set remaining amount” is provided on the display portion 87. When the secondary battery 38 is discharged, when the actual remaining amount of the secondary battery 38 reaches the remaining amount setting value set and stored in the battery remaining amount storage unit 134, the setting is stored in the discharge time storage unit 133. This is for informing in advance that the discharge is stopped regardless of the discharge time.

  Next, the operation of each operation mode in the above configuration will be described with reference to the display screen of the display unit 87 shown in FIGS.

  In the state where the operation of the storage battery system 1 is stopped, the power failure switching part 43 and the maintenance switch 44 in the power storage panel 7 which is the main body are both on, and the AC from the system S or the photovoltaic power generation system 21 The electric power is converted into DC power through a path of the first power supply line 8 → the second power supply line 17 → the AC / DC conversion circuit 59, and this DC power is applied to the control power supply circuit 65, and a predetermined operating voltage is applied to the control board 54. Is also applied to the automatic voltage regulators 67 and 68 from the noise filter 66, so that stable DC 12V and DC 24V are generated in the storage battery board 7. In particular, the direct current 12 V from the automatic voltage regulator 67 is supplied to the indoor controller 6 via the operating voltage line 69 as the operating voltage of the controller control means 121. Therefore, the controller control means 121 can recognize the detection signal from the door opening / closing detection unit 124 and the operation signal from the second operation unit 89 even when the operation of the storage battery system 1 is stopped.

  In addition, except for an emergency, the contact 33 in the second distribution board 5 is always off and the contact 34 is always on. Therefore, when the operation of the storage battery system 1 is stopped, the contact from the system S or the photovoltaic power generation system 21 is stopped. AC power is supplied from the first power line 8 to the in-house load L1 connected to the outlet of the first distribution board 4, and from the second power line 17 to the second power supply line 31 in the storage battery panel 7, It is supplied to the in-house load L2 connected to the outlet of the second distribution board 5.

  Here, in order to start the operation of the storage battery system 1 from the stopped state, the door 85 of the controller 6 installed indoors is opened and the operation on / off button 89F is pushed. Then, the controller control means 121 receives an operation signal from the operation on / off button 89F, immediately starts the operation mode (recommended mode) by the recommended mode control instruction section 151, and supports the recommended mode by the display section control means 127. The display form is displayed on the display unit 87. In the recommended mode, the secondary battery 38 is charged / discharged at a charge / discharge start time and end time set in advance, and the recommended mode control instruction unit 151 reads out from the recommended timer time storage unit 131A. Power is supplied through the control line 71 so that the secondary battery 38 is charged or discharged by comparing the charging start time, the charging end time, the discharge start time and the discharge end time with the current time taken from the time measuring unit 122. A charge signal or a discharge signal is sent to the control board 54 of the conditioner 42.

  FIG. 21 shows a display form of the display unit 87 during charging of the secondary battery 38 in the recommendation mode. In the figure, the charge / discharge time display portion 87F includes the charge start, charge end, discharge start, and discharge end times read from the recommended timer time storage portion 131A as “23:00” and “07: 0”, respectively. , “13:00” and “16:00” are displayed. For users who are not familiar with the storage battery system 1, the charging start time and the charging end time preset and stored in the recommended timer time storage unit 131 </ b> A are within a time zone where the electricity charge in the power company managing the system S is low. It is preferable that the discharge start time and the discharge end time are within a time zone when the electricity rate is high.

  When the charge start time read from the recommended timer time storage unit 131A matches the current time taken in from the time measuring unit 122, the recommended mode control instruction unit 151 charges the secondary battery 38 with a predetermined charging current. A charge signal is sent to the control board 54 in the storage battery board 7. If the control board 54 determines that the system S has not failed based on the detection signal from the first relay 75, the control board 54 turns on the switching relay 56 and turns off the switching relay 57. When the charging signal is sent from the AC power, the power converter 53 converts the AC power sent from the system S or the photovoltaic power generation system 21 via the second power line 17 in the storage battery panel 7 into DC power. An appropriate charge command signal is sent to the gate drive circuit 63 while recognizing the actual state of the secondary battery 38 based on a signal sent from the storage battery control unit 39 through the control line 51 so that the secondary battery 38 can be supplied. Supply.

  The gate drive circuit 63 receives this charge command signal and supplies a pulse drive signal having a predetermined pulse conduction width to the DC / AC conversion circuit 61 and the DC / DC conversion circuit 62, respectively. The applied AC power is converted into DC power and output from the DC / DC conversion circuit 62. The storage battery control unit 39 that monitors the state of the secondary battery 38 turns on the switches 48 and 49 unless the storage battery modules MDL1 to MDL6 are abnormal, and the control board 54 also turns on the first switch 77. Since the DC power from the DC / DC conversion circuit 62 is supplied to the secondary battery 38 through the DC line 46, the storage battery modules MDL1 to MDL6 are charged with a predetermined charging current. .

  Similarly, the recommended mode control instruction unit 151 discharges the secondary battery 38 with a predetermined discharge current when the discharge start time read from the recommended timer time storage unit 131 </ b> A matches the current time taken from the time measuring unit 122. Thus, a discharge signal is sent to the control board 54. When a discharge signal is sent from the controller 6, the control board 54 converts the DC power stored in the secondary battery 38 into AC power by the power converter 53 and sends it to the second power supply line 17, from which the first power is supplied. It is sent from the storage battery control unit 39 through the control line 51 so that AC power can be supplied to the residential load L1 via the power line 8 and AC power can be supplied to the residential load L2 via the second feeder 31. An appropriate discharge command signal is supplied to the gate drive circuit 63 while recognizing the actual state of the secondary battery 38 based on the incoming signal.

  Upon receiving this discharge command signal, the gate drive circuit 63 supplies a pulse drive signal having a predetermined pulse conduction width to the DC / AC conversion circuit 61 and the DC / DC conversion circuit 62, respectively, to the DC / DC conversion circuit 62. The applied DC power is converted into AC power and output from the DC / AC conversion circuit 61. Here, as long as there is no abnormality in the storage battery modules MDL1 to MDL6, the switches 48 and 49 are in the on state, and the first switch 77 is also in the on state, so that the DC power from the secondary battery 38 is The voltage is applied to the DC / DC conversion circuit 62 via the DC line 46.

  When the secondary battery 38 is being charged in the recommendation mode by the recommendation mode control instruction unit 151, the display unit control unit 127 controls the display unit 87 so that the display as shown in FIG. 21 is performed. Here, in addition to displaying that the secondary battery 38 is charged from the power supply by the operation display unit 87E, the actual operation of the secondary battery 38 sent from the control board 54 via the control line 71 is shown. The remaining amount information is displayed on the remaining amount display portion 87C, and the remaining amount setting value of the secondary battery 38 stored and stored in the remaining battery amount storage portion 134 is displayed on the set remaining amount display portion 87D. During the discharge of the secondary battery 38, only the operation display unit 87E in FIG. 21 switches to a display mode in which power is consumed from the secondary battery 38 to the residential loads L1, L2, for example, as shown in FIG. Change.

  The recommended mode control instructing unit 151 is configured so that the actual remaining charge (charge amount) of the secondary battery 38 sent from the control board 54 via the control line 71 during the transmission of the charge signal is a preset upper limit. A determination is made as to whether or not the battery has reached full charge. Temporarily, it is determined that the actual charge amount of the secondary battery 38 has almost reached full charge until the current time taken from the time measuring unit 122 reaches the charge end time read from the recommended timer time storage unit 131A. Then, in order to stop the charging of the secondary battery 38, the transmission of the charging signal is immediately terminated. Thereby, the overcharge with respect to the secondary battery 38 can be prevented.

  On the other hand, even if the actual amount of charge of the secondary battery 38 does not reach a full charge before the current time reaches the charging end time, when the current time reaches the charging end time, a charging signal is transmitted there. finish. As a result, it is possible to reliably prevent the secondary battery 38 from being charged with a high electric charge after the midnight power is cheap.

  In addition, the recommended mode control instruction unit 151 sets the actual remaining discharge amount of the secondary battery 38 sent from the control board 54 via the control line 71 during the sending of the discharge signal as a preset lower limit value. It is determined whether or not a predetermined remaining amount is reached. Assuming that the actual remaining amount of the secondary battery 38 has decreased to the set remaining amount until the current time taken from the time measuring unit 122 reaches the discharge end time read from the recommended timer time storage unit 131A. If it judges, in order to stop discharge from the secondary battery 38, transmission of a charge signal will be complete | finished immediately. As a result, adverse effects caused by discharging the secondary battery 38 more than necessary can be eliminated.

  On the other hand, even if the actual remaining amount of the secondary battery 38 does not decrease to the predetermined remaining amount until the current time reaches the discharge end time, when the current time reaches the discharge end time, the discharge signal The delivery is terminated, and an unnecessary discharge from the secondary battery 38 is avoided.

  Note that the recommended mode by the recommended mode control instruction unit 151 described above is effective when the storage battery system 1 is started up and starts a series of operations, and is also a recommended switch during operation in another mode. It is also effective by operating the button 88A. In this case, the timer mode by the timer mode control instruction unit 156 is invalidated so as not to function.

  Next, the timer mode operation by the timer mode control instruction unit 156 will be described. In the timer mode, the secondary battery 38 is charged / discharged at an arbitrarily set charge / discharge start time or end time. This is the timer on / off state display section 87N in FIG. Alternatively, when the determination button 89B is pushed and operated in the state where the second timer is displayed in the on state, the operation becomes valid and the operation starts. At this time, the recommended mode that functioned effectively until then is disabled and does not function.

  When the secondary battery 38 is being charged in the timer mode, the display control unit 127 controls the display unit 87 so that the display as shown in FIG. 22 is performed. Here, in particular, in addition to displaying that the secondary battery 38 is charged from the power supply by the operation display unit 87E, the secondary battery 38 sent from the control board 54 via the control line 71 is displayed. Information about the actual remaining amount is displayed by the remaining amount display unit 87C, and the remaining amount setting value of the secondary battery 38 stored and stored in the remaining battery amount storage unit 134 is displayed by the set remaining amount display unit 87D. Further, according to the on / off state read from the timer function storage unit 131D, the charging start, charging end, discharge start and discharge end times corresponding to the on state timer are displayed on the charge / discharge time display unit 87F. For example, in FIG. 22, when the first timer is in the on state, the charge start, charge end, discharge start and discharge end times read from the first timer time storage unit 131B are “12:34” and “15: 34 ”,“ 02:34 ”, and“ 05:34 ”are displayed on the charge / discharge time display portion 87F. Although not shown, only the operation display unit 87E in FIG. 22 consumes power from the secondary battery 38 to the residential loads L1 and L2 as shown in FIG. Switch to display mode.

  In the timer mode, the charging signal and the discharging signal are transmitted at a predetermined timing from the timer mode control instruction unit 156 with exactly the same contents as the above-described recommended mode control instruction unit 151, and two times to the storage battery panel 7. The secondary battery 38 is charged / discharged. This is the same in other modes, and in the future, description of the operation related to charging / discharging of the secondary battery 38 will be omitted as much as possible to avoid duplication.

  If the charge start time and the charge end time set and stored in the first timer time storage unit 131B are the same time, the timer mode control instruction unit 156 does not send a charge signal even if the current time becomes the charge start time. If the discharge start time and the discharge end time set and stored in the first timer time storage unit 131B are the same time so that the secondary battery 38 is not charged, a discharge signal can be sent even if the current time becomes the discharge start time. The secondary battery 38 is not discharged. Then, only the charge start time and the charge end time set at different times, or the discharge start time and the discharge end time are transmitted, and the secondary battery 38 is charged or discharged. The same applies to the charge start time and charge end time, and the discharge start time and discharge end time set and stored in the second timer time storage unit 131C.

  In addition, the timer mode control instruction unit 156 may charge or discharge the secondary battery 38 using the timer time of one or both of the first timer and the second timer set to the on state by the timer time setting unit 141. it can. In particular, when both the first timer and the second timer are enabled and used, the timer mode control instruction unit 156 changes from the ON / OFF state stored in the timer function storage unit 131D to the first timer time storage unit 131B. The charge / discharge start time and discharge time stored in the second timer time storage unit 131C are read out, and a charge signal and a discharge signal are sent to the control board 54 at a predetermined timing. The charge set by the first timer If the time or discharge time overlaps with the charge time or discharge time set by the second timer, the first timer is prioritized and the charge / discharge start time stored and set in the first timer time storage unit 131B A charge signal or a discharge signal is sent to the control board 54 at a predetermined timing only at the discharge time.

  Next, the operation of the charging mode by the charging mode control instruction unit 153 will be described. In order to charge the secondary battery 38 at the user's will, the charge mode is charged during the recommended mode or timer mode operation, regardless of the charge start time or charge end time set in the recommended mode or timer mode. This is performed by pushing the button 88C.

  More specifically, the charging mode control instruction unit 153 uses a normal charging pattern for charging the secondary battery 38 at 0.2 C, for example, as a plurality of charging patterns with different charging rates for the secondary battery 38, and a normal charging pattern. In addition, the charging speed is at least twice as fast, and a quick charging pattern for charging the secondary battery 38 at 0.5 C, for example, is provided. The controller 6 includes a charging time setting unit 142 that sets the charging time of the secondary battery 38 in the normal charging pattern and stores it in the charging time storage unit 132. In the normal charging pattern, the charging time storage unit 132 is provided. In the quick charge pattern, the secondary battery 38 is charged until it is almost fully charged. Then, according to the difference in the operation input of the charging button 88C, for example, when the charging button 88C is pressed once for a short time, reception of a normal charging pattern is instructed among a plurality of charging patterns, and the charging button 88C is pressed once. When a long press operation is performed, reception of a quick charge pattern is instructed among a plurality of charge patterns.

  When the charging mode control instruction unit 153 receives the normal charging pattern in response to the operation instruction of the charging button 88C, the charging signal is sent to the control board 54 in the storage battery panel 7 so as to charge the secondary battery 38 with a predetermined charging current. Starts sending. At the same time, the charging mode control instruction unit 153 reads the charging time set and stored in the charging time storage unit 132, and the scheduled end time of charging corresponding to this charging time becomes the current time counted by the time measuring unit 122. Until the charging signal is transmitted. When the scheduled end time of charging reaches the current time, the transmission of the charging signal is terminated, and the original recommended mode or timer mode is entered. However, when receiving the quick charge pattern by pressing and holding the charge button 88C while charging the secondary battery 38 using the normal charge pattern, the charge mode control instruction unit 153 receives the quick charge pattern, and this quick charge is performed. The secondary battery 38 is charged by the pattern.

  In addition, when the charging mode control instruction unit 153 receives the rapid charging pattern by the operation instruction of the charging button 88C, the charging mode control instruction unit 153 applies the predetermined charging current to the control board 54 in the storage battery panel 7 so as to charge the secondary battery 38. Start sending the charging signal. At the same time, the charging mode control instruction unit 153 continues to send the charging signal until the actual amount of charge of the secondary battery 38 sent from the control board 54 via the control line 71 reaches almost full charge. When the actual charge amount of the secondary battery 38 reaches almost full charge, the transmission of the charge signal is terminated, and the original recommended mode or timer mode is entered.

  In the above-described series of steps, the charging mode control instruction unit 153 uses the detection signal from the first current transformer 15 while the secondary battery 38 is being charged, so that the home load L1, L2 and the storage battery system 1 are included in the home. When the total amount of current consumed in the home is larger than the contract current amount of the home read from the initial setting storage unit 135, charging by the quick charge pattern is not performed. Instead, the secondary battery 38 is charged by the normal charging pattern. Also, even when the acceptance of the quick charge pattern is instructed by operating the charge button 88C, the total current amount in the home is measured, and the total current amount consumed in the home is stored as an initial setting. If it is larger than the contract current amount of the home read from unit 135, charge mode control instruction unit 153 switches to the normal charge pattern to charge secondary battery 38, and conversely, the total current amount is equal to or less than the contract current amount. If the value is equal to or less than a predetermined value, the secondary battery 38 may be charged in a quick charge pattern. As yet another example, even when a quick charge pattern acceptance is instructed by operating the charge button 88C, the total current amount in the home is also measured and the total current amount may be larger than the contract current amount. For example, the charging mode control instruction unit 153 interrupts the charging of the secondary battery 38 according to the quick charge pattern, and when the total current amount becomes equal to or less than a predetermined value that is equal to or less than the contract current amount, The charging of the battery 38 may be resumed. In any case, it becomes possible to control the circuit breaker 11 so that the circuit breaker is not cut off by charging the secondary battery 38 by the quick charge pattern.

  In the present embodiment, the above-described normal charge pattern and quick charge pattern are provided as the plurality of charge modes having different maximum charge currents for the secondary battery 38. However, in these normal charge pattern and quick charge pattern, the secondary battery 38, based on the charging signal from the controller 6, so that the current consumption in the residential premises detected by the first current transformer 15 does not exceed the contract current read from the initial setting storage unit 135 during the charging operation of 38. The charge current to the secondary battery 38 is controlled by the conditioner 42. As a result, it is possible to prevent problems such as the contract breaker 11 dropping while the secondary battery 38 is being charged, and it is possible to control the charging of the secondary battery 38 in consideration of the contract current. In particular, in the quick charge pattern having a maximum charge current larger than that of the normal charge pattern, the secondary battery 38 is charged with the maximum charge current within the set range not exceeding the contract current. The charging time can be prevented from being prolonged more than necessary.

  In the charging operation of the secondary battery 38, in order to prevent the consumption current in the residential premises from exceeding the contract current, when the consumption current exceeds the contract current, for example, by switching the quick charge mode to the normal charge mode, The charge amount of the secondary battery 38 is decreased. Thereby, the charging current to the secondary battery 38 can be controlled so that the consumption current does not exceed the contract current without stopping the charging to the secondary battery 38. In this case, when the consumption current does not exceed the contract current, it is preferable to change again to the quick charge mode in which the charging current is maximized, and the secondary battery 38 is quickly charged, and the current consumption does not exceed the contract current. Thus, it is possible to prevent the charging time of the secondary battery 38 from being prolonged as much as possible.

  As another example, when the current consumption exceeds the contract current, the charging signal transmission may be interrupted, and the charging of the secondary battery 38 may be stopped until the current consumption does not exceed the contract current. Can control the charging current to the secondary battery 38 so that the consumption current does not quickly exceed the contract current.

  The storage unit 123 including the initial set value storage unit 135 is provided on the control board 98 in the controller 6 together with the controller control unit 121 including a CPU and the like. After the controller control unit 121 and the storage unit 123, which are substantial control units of the controller 6, are provided in the same controller 6, the controller control unit 121 quickly reads and calculates the information stored in the storage unit 123. The charge signal and the discharge signal can be sent to the power conditioner 42. As a result, high-speed processing is realized.

  When the normal charging pattern is reached, the display control unit 127 controls the display unit 87 so that the display as shown in FIG. 23 is performed. Here, in particular, in addition to displaying that the operation is in the normal charge pattern by the alert display unit 87M with the characters “in normal operation”, the charge time stored in the charge time storage unit 132 is charged / discharged. It is displayed on the time display part 87F. For example, in FIG. 23, the set charging time is “3 hours”, and charging / discharging time display section 87F displays that charging is performed between “12:34” and “15:34”.

  Next, the operation of the discharge mode by the discharge mode control instruction unit 154 will be described. In order to forcibly discharge the secondary battery 38 at the user's will, the discharge mode does not depend on the discharge start time or discharge end time set in the recommended mode or timer mode. This is performed by pushing the discharge button 88D.

  More specifically, the controller 6 sets the remaining amount setting value of the secondary battery 38 and discharges the discharge time by the battery remaining amount setting unit 144 as a remaining amount setting unit to be stored in the remaining battery amount storage unit 134 and the timer. A timer time setting unit 143 as a timer discharge time setting means set by a start time and a discharge end time, and a discharge button 88D as a button for instructing discharge start are provided. For example, the discharge start time and the discharge end time set and stored in the first timer time storage unit 131B are read out by the unit 151 and the timer mode control instruction unit 156, and the control line is controlled from the control board 54 during the discharge between the discharge times. 71, the actual remaining amount of the secondary battery 38 sent via 71 is set to the remaining amount set value read from the remaining battery amount storage unit 134. Until bottom, while continuing the delivery of the discharge signal, the actual remaining capacity of the rechargeable battery 38 becomes the remaining set value, to terminate the delivery of the discharge signal. This is as described in the recommendation mode and the timer mode.

  On the other hand, the discharge mode by the discharge mode control instructing unit 154 is started by pressing the discharge button 88D, and the discharge time set and stored in the discharge time storage unit 134 is read, and the discharge corresponding to this discharge time is read out. The discharge signal is continuously sent until the scheduled end time reaches the current time counted by the timer unit 122. When the scheduled end time of the discharge becomes the current time, the transmission of the discharge signal is terminated, and the original recommended mode or timer mode is entered.

  That is, in this discharge mode, the discharge button 88D is operated even when the remaining amount is reduced to the remaining amount set value of the secondary battery 38 regardless of the actual remaining amount of the secondary battery 38. Thus, the secondary battery 38 is forced for a predetermined time until the actual remaining amount reaches the lower limit use limit value after the remaining amount is lower than the remaining amount set value of the secondary battery 38 or the secondary battery 38 is used up. Can be discharged electrically.

  As an exception, when the discharge mode control instruction unit 154 determines that the actual remaining amount of the secondary battery 38 has reached the lower limit use limit value of the secondary battery 38, the discharge mode control instruction unit 154 stores it in the discharge time storage unit 133. Transmission of the discharge signal is stopped regardless of the discharge time set and stored. Further, if the actual remaining amount of the secondary battery 38 has already reached the lower limit use limit value of the secondary battery 38 at the time when the discharge button 88D is operated, the discharge signal itself is not sent. By doing in this way, the bad effect by discharging the secondary battery 38 more than necessary can be prevented.

  In the discharge mode, the display unit control means 127 controls the display unit 87 so that the display as shown in FIG. 24 is performed. Here, in particular, in addition to displaying on the operation display unit 87E that power consumption is being performed from the secondary battery 38 to the in-house loads L1, L2, the discharge time stored and stored in the discharge time storage unit 133 is: It is displayed on the charge / discharge time display part 87F. For example, in FIG. 24, the set discharge time is “3 hours”, and the fact that the discharge is performed between “12:34” and “15:34” is displayed on the charge / discharge time display portion 87F.

  Next, the assist mode operation by the assist mode control instruction unit 155 will be described. In the assist mode, for example, when the amount of power used by the residential loads L1 and L2 temporarily increases in the morning, the secondary battery 38 is discharged only for a predetermined time, and the residential load is discharged from the secondary battery 38. In this mode, the amount of power supplied to L1 and L2 is temporarily increased. This starts when the assist button 88B of the first operation unit 88 is pushed during operation in the recommendation mode or the timer mode.

  More specifically, when the assist mode control instructing unit 155 starts the assist mode, the assist mode control instructing unit 155 does not immediately send a discharge signal to the control board 54 of the storage battery panel 7 but rather a predetermined time (for example, 30 minutes) after the assist button 88B is operated. After that, the operation of the assist button 88B is accepted and transmission of the discharge signal is started, and the secondary battery 38 is discharged by continuing to transmit the discharge signal until a predetermined time (for example, 1 hour) elapses therefrom. . That is, the amount of power used by the loads L1 and L2 in the house actually increases after a certain time has elapsed since the user got up. Therefore, if the assist button 88B is operated immediately after getting up, the load in the house Necessary electric power can be supplemented from the secondary battery 38 in accordance with an increase in power consumption of L1 and L2. When the predetermined time has elapsed, the transmission of the discharge signal is terminated, and the original recommended mode or timer mode is entered.

  In the assist mode of the present embodiment, the time when the assist button 88B is operated is stored in the operation time storage unit 136 by the assist mode control instruction unit 155 in the operation time storage unit 136 of the storage unit 123 each time. Based on the time, the secondary battery 38 can be discharged for a predetermined time at a predetermined time. For example, it is assumed that the times of the last three days stored in the operation time storage unit 136 are (am) 7:45, 7:15, and 7:30. The predetermined time in this case may be 7:30, which is the average of the most recent three days, or may be 7:15, which is the time when the assist button 88B is operated earliest. In any case, since the secondary battery 38 is discharged in the assist mode for a predetermined time at the predetermined time based on the operation time of the assist button 88B until then, the amount of power consumed by the loads L1 and L2 in the house is increased. In addition, the necessary power can be supplemented from the secondary battery 38 without operating the assist button 88B each time.

  During the operation in the assist mode, the current value used in the home (in the residential premises) is measured by the current transformer 15, and the assist mode control instruction unit 155 pushes the assist button 88 </ b> B to use this current value. In order to discharge the secondary battery 38 from when the battery exceeds a predetermined value, a discharge signal is sent for a predetermined time. For example, if the contract current is 50 A and the actual use current value is 20 A, the discharge signal is not sent in the assist mode, and when the predetermined value is 50 A, the discharge signal is sent from there for a predetermined time. Power is supplied from the next battery 38.

  As another example, the assist mode control instructing unit 155 indicates that the use current value detected by the first current transformer 15 has a predetermined value within a predetermined time after the assist button 88B is pressed or by a preset time. If it exceeds, the secondary battery 38 may be discharged. For example, if the actual use current value exceeds 50 A within one hour, which is a predetermined time after the assist button 88B is pressed, a discharge signal is sent only during that time, and the power from the secondary battery 38 is Supply.

  This is in consideration of the fact that the peak of the electric energy used by the loads L1 and L2 in the house does not actually occur immediately after the user wakes up, and the assist mode control instruction unit 155 is provided with such a function. Thus, the necessary power can be supplemented from the secondary battery 38 after the peak of the amount of power used by the in-house loads L1 and L2 approaches.

  Further, the assist mode control instruction unit 155 having such a function can read the contract power amount set and stored in the initial set value storage unit 135 and discharge the power exceeding the contract power amount from the secondary battery 38. Such a discharge signal is transmitted. As a result, even when the in-house loads L1 and L2 become used power exceeding the contracted electric energy, the secondary battery 38 can be prevented from supplying power to the in-house loads L1 and L2 more than necessary.

  Further, the assist mode control instruction unit 155 in the present embodiment discharges the secondary battery 38 so that 3 kVA, which is a normal rated output, can be discharged when the current value in the home exceeds a predetermined value. It has a function to send a signal. In this way, the electric power necessary for the in-house loads L1, L2 can be supplemented by the rated output of the secondary battery 38 after the peak of the amount of power used by the in-house loads L1, L2 approaches.

  In addition, as a structural feature, the controller 6 of this embodiment is provided with a door 85 as an openable / closable cover that can be opened and closed with respect to the housing 84, and is located inside the door 85 and covered with the door 85. While the second operation unit 89 for various setting functions is provided, the assist button 88B constituting the first operation unit 88 is provided at a location that is not covered by the door 85 even when the door 85 is closed. Therefore, when the amount of power used for the in-house loads L1 and L2 increases, the assist button 88B can be operated immediately without having to bother to open the door 85. Such an effect can be applied to the other buttons of the first operation unit 88.

  In the assist mode, the display control unit 127 controls the display unit 87 so that the display as shown in FIG. Here, in particular, in addition to displaying the power consumption in the assist mode from the secondary battery 38 to the in-house loads L1, L2, the operation display unit 87E displays the discharge time in the assist mode as a charge / discharge time display. This is displayed on the part 87F. For example, in FIG. 25, the discharge time in the assist mode is “1 hour”, and the fact that the discharge is performed between “11:00” and “12:00” is displayed on the charge / discharge time display portion 87F.

  Next, the operation in the power failure independent operation mode by the power failure mode control instruction unit 152 will be described. The power failure self-sustained operation mode is a mode in which when the information indicating that the power failure of the system S has occurred via the control line 71 from the control board 54 side, the operation is automatically started to cause the storage battery system 1 to operate independently.

  As described above, when a transition to the power failure self-sustained operation mode occurs at the time of a power failure, the power failure switching unit 43 is switched to an off state by a control signal from the control board 54, and the storage battery panel 7 having the secondary battery 38 and the system S are linked. To prevent the power from flowing backward to the grid S. In addition, the control board 54 switches the second switch 79 from off to on when charging the secondary battery 38 with AC 100 V supplied from the solar power generation system 18 via the third power supply line 52. Furthermore, in order to apply AC100V from the auxiliary power line 22 to the DC / AC conversion circuit 61 or to supply AC100V from the DC / AC conversion circuit 61 to the residential load L2, the switching relay 56 is turned on. At the same time as switching to OFF, the switching relay 57 is switched from OFF to ON. When a power failure occurs, the power supply through the AC / DC conversion circuit 59 is cut off, but the power from the secondary battery 38 is applied from the operation power supply unit 55 to the noise filter 66 to continue the storage battery control unit 39 or An operating voltage can be supplied to the controller 6.

  The power failure mode control instruction unit 152 acquires information on the power supply amount from the photovoltaic power generation system 21 from the control board 54 via the control line 71 in the power failure independent operation mode. When it is determined that the secondary battery 38 can be charged from the solar power generation system 21, a charging signal is sent to the control board 54, while the house connected from the secondary battery 38 to the second distribution board 5. When it is determined that backup power supply is necessary for the load L2, a discharge signal is sent to the control board 54. When a charging signal is transmitted at the time of a power failure, AC100V from the photovoltaic power generation system 21 is transmitted in the order of the auxiliary power line 22 → the second power line 17 → the third power supply line 52, and is converted into DC power by the power conversion unit 53. Then, it is supplied to the secondary battery 38. Further, when a discharge signal is sent at the time of a power failure, the DC power stored in the secondary battery 38 is converted into AC power by the power converter 53, and from there, the third power supply line 52 → second power supply line 17 → second supply AC 100V is supplied to the residential load L2 via the electric wire 31. However, since the power failure switching unit 43 is in an off state at the time of a power failure, the in-house load L1 connected to the first distribution board 4 is cut off and cannot be used.

  In particular, in this embodiment, the rated output from the secondary battery 38 in the power failure self-sustained operation mode is less than the rated output from the secondary battery 38 in the case of cooperation with the system S, and preferably 2/3 or less. Thus, the discharge control of the secondary battery 38 by the power failure mode control instruction unit 152 is performed. The reason is that the rated output from the secondary battery 38 is reduced at the time of a power failure to enable long-term use with respect to the residential load L2, while the normal operation from the secondary battery 38 is linked to the system S. This is because the rated output can be increased, a large amount of power can be used at once for the residential loads L1, L2, and a large number of peak shifts can be accommodated by using up the secondary battery 38 in a short time.

  In addition, the power failure mode control instruction unit 152 forces the secondary battery 38 even when the remaining amount has decreased to the remaining amount set value of the secondary battery 38 regardless of the actual remaining amount of the secondary battery 38. Discharge. However, when it is determined that the actual remaining amount of the secondary battery 38 has reached the lower limit use limit value of the secondary battery 38, the sending of the discharge signal is stopped there.

  Thus, while the power failure continues, the power failure mode control instruction unit 152 continues to send the discharge signal until the secondary battery 38 is used up. However, when the power supply from the system S resumes and the power returns, the power failure independent operation The mode ends and the discharge signal transmission stops. Here, the control board 54 switches the power failure switching unit 43 from off to on, links the storage battery panel 7 and the system S, switches the second switch 79 from on to off, AC power is supplied from the third power supply line 19 to the first power supply line 8. Furthermore, in order to apply AC200V from the second power supply line 17 to the DC / AC conversion circuit 61 or to supply AC200V from the DC / AC conversion circuit 61 to the second power supply line 17, a switching relay 56 is provided. At the same time as switching from off to on, the switching relay 57 is switched from on to off, and the operation of the storage battery system 1 is resumed.

  In the power failure operation self-sustained mode, the display control unit 127 controls the display unit 87 so that the display as shown in FIG. 26 is performed. Here, for example, while charging the secondary battery 38 with the electric power from the solar power generation system 21 (“PV”), the power consumption is performed from the solar power generation system 21 to the loads L1 and L2 in the house. Displayed on the operation display section 87E. Moreover, it displays on the alert display part 87M that the storage battery system 1 is interlock | cooperating with HEMS apparatuses, such as the photovoltaic power generation system 21. FIG.

  Further, as a preferable example, in addition to the automatic self-sustained operation that automatically starts the self-sustained operation of the storage battery panel 7 at the time of a power failure as described above, the storage battery panel 7 does not automatically start the self-sustained operation at the time of a power failure. The power failure mode control instructing unit 152 is provided with both operation patterns of manual self-sustained operation for starting the self-sustained operation of the storage battery panel 7 by performing manual operation such as pushing the The storage battery system 1 may be configured so that any one of a self-sustained operation and a manual self-sustained operation can be selected and set. In this case, after switching to automatic self-sustained operation, it is possible to select and set again to manual self-sustained operation in a specific procedure different from normal. It is preferable to select and set automatic self-sustaining operation again in the procedure. The specific procedure that is different from the normal procedure described here includes an operation that is different from the operation of short-pressing or long-pressing only one button 88A to 88D or 89A to 89F, or inputting a password using the buttons 89A to 89F. means. Specifically, for example, when the storage battery system 1 is temporarily turned off and the operation on / off button 89F is pushed while simultaneously pressing the recommendation button 88A and the assist button 88B, or by the operation from the second operation unit 89. When the password is input and the entered password matches the set password stored in advance in the storage unit 132, for example, the power failure operation setting menu can be selected from the display form shown in FIG. do it.

  Next, an initial setting after the storage battery system 1 is installed will be described. After all the storage battery systems 1 are installed in the residential premises, the initial setting values are input and stored using the controller 6 installed indoors. In order to operate the initial setting value setting unit 145, the “initial value setting” menu is displayed in the black and white reversed state in the display form of the display unit 87 shown in FIG. 14, and the enter button 89B is pushed. Good. In order to set the initial setting value by the initial setting value setting unit 145, the first operation unit 88 and the second operation unit 89 are different from normal button operations so that the user cannot easily perform the initial setting value. Or by operating a switch (not shown) arranged in a place where the controller 6 cannot be operated normally.

  The parameters that are set and stored in the initial setting value storage unit 135 using the initial setting value setting unit 145 are the first control setting value that differs for each electric power company that owns the grid S, and for each home that contracts with the electric power company. It is roughly divided into different second control set values.

  Examples of the first control set value include an OVR (overvoltage protection relay) setting value that is the voltage upper limit value of the system S, and an overvoltage protection relay when the actual voltage of the system S rises above the voltage upper limit value of the system S. When the OVR settling time until the system is operated, the UVR (undervoltage protection relay) settling value that is the voltage lower limit value of the system S, or the actual voltage of the system S falls below the voltage lower limit value of the system S, the undervoltage When the UVR settling time until the protection relay is operated, the OFR (frequency increase relay) settling value that is the frequency upper limit value of the system S, or the actual frequency of the system S rises above the frequency upper limit value of the system S, the frequency When the OFR settling time until the ascending relay is operated, the UFR (frequency lowering relay) settling value that is the frequency lower limit value of the system S, or the actual frequency of the system S is lower than the frequency limit value of the system S , The UFR settling time until the frequency lowering relay is operated, the voltage rise restraint set value that is the voltage rise restraint voltage value of the system S, and the time from the end of the power failure to the operation of the storage battery system 1 after the power failure It is a recovery timer setting time after a certain power recovery or a frequency setting value that is a commercial frequency of the system S. Further, examples of the second control set value are values of the contract power amount and the contract current amount respectively determined in each home.

  The initial setting value storage unit 135 stores and saves initial values for each of the above values in advance. If necessary, the initial value can be changed to another value using the first operation unit 88 or the second operation unit 89. It can be changed to. As an example, the initial value of the first control set value is an OVR set value of 115 V, an OVR set time of 1.0 s, a UVR set value of 80 V, and a UVR set time of 1.0 s, The OFR set value is 51.0 Hz or 61.0 Hz depending on the frequency set value, the OFR set time is 1.0 s, and the UFR set value is 48.5 Hz or 58.5 Hz depending on the frequency set value. Yes, the UFR settling time is 1.0 s, the voltage rise suppression settling value is 108 V, the recovery timer settling time after power recovery is 150 s, and the frequency settling value is 50 Hz.

  The initial set value setting unit 145 constitutes the power conditioner 42 as well as the initial set value storage unit 135 of the storage unit 132 provided in the controller 6 for the first control set value and the second control set value. The setting is also stored in the initial setting storage unit 161 of the control board 54. The initial setting storage unit 161 is provided as a backup during maintenance inspection. For example, when one of the control boards 54 and 98 is replaced, the first control remaining in one of the initial setting value storage units 135 and 161 is provided. The set value and the second control set value can be reused.

  Next, the effect | action at the time of the maintenance inspection of the storage battery system 1 is demonstrated. During maintenance and inspection, the operation on / off button 89F is pushed to stop the operation of the storage battery system 1, and then the cutting machine 47 is manually operated to prevent an unexpected electric shock by the storage battery modules MDL1 to MDL6. The serial line 46 is cut. When the detection signal from the cutting machine 47 at this time is sent to the storage battery control unit 39, the storage battery control unit 39 turns off the switches 48 and 49 and disconnects the secondary battery 38 from the system S. Further, the maintenance switch 44 is switched from ON to OFF by the control signal given from the storage battery control unit 39 to the control board 54, and the storage battery panel 7 is disconnected from the system S. From this state, for example, any of the battery cell management modules CMU1 to CMU6 constituting the secondary battery 38 can be replaced as necessary.

  Note that the electrical connection between the second distribution board 5 and the storage battery board 7 is cut off due to the maintenance switch 44 being turned off during maintenance inspection. AC100V cannot be supplied from the panel 5 to the residential load L2 via the storage battery panel 7. Therefore, by using a switching circuit 29 as a switching device provided in the second distribution board 5, the first power supply 17 is not supplied from the second distribution board 5 via the storage battery board 7, but from the AC 200 V of the second power line 17. AC100V can be supplied to the residential load L2 via the electric wire 30. Specifically, this is achieved by operating the operating body 32 to turn the contact 33 from off to on and the contact 34 from on to off, and the house load L2 can be used even during maintenance inspection.

As described above, the storage battery system 1 of the present embodiment recognizes the state of the secondary battery 38 that receives power supply from the system S together with the in-house loads L1 and L2 in the residential premises, A storage battery control unit 39 that controls the secondary battery 38, a power conditioner 42 as a charge / discharge control unit that controls charge / discharge of the secondary battery 38, and charge / discharge start of the secondary battery 38, for example, The controller 6 as a setting unit for setting various parameters such as the end time and the power failure switching unit 43 are provided . During normal operation linked with the system, the power failure switching unit 43 is turned on so that the secondary battery 38 the power is supplied to the residential load L1, L2, at the time of system power failure, the power failure closing portion 43 in the oFF state, the power from the secondary battery 38 is configured to supply only the residential load L2, Lower conditioner 42, the rated output from the secondary battery 38 when it is determined that the power failure, to be less than the rated output from the secondary battery 38 when you are in conjunction with systems, and the normal power failure In some cases, the discharge of the secondary battery 38 is controlled so that electric power is supplied to the residential load L2 at the same voltage .

In this case, the power failure open / close unit 43 is turned on in a normal state, and by controlling the discharge of the secondary battery 38, the power stored in the secondary battery 38 can be supplied to the residential loads L1, L2, and the power failure occurs. Then, the power failure switching unit 43 is turned off, and the secondary battery 38 is controlled to be discharged, so that power can be supplied from the secondary battery 38 only to the residential load L2. In addition, the rated output from the secondary battery 38 is reduced at the time of a power failure so that it can be used for a long time with respect to the residential load L2, while the rated output from the secondary battery 38 is normally operated in cooperation with the system S. , And a large amount of electric power can be used at once for the residential loads L1 and L2, and a lot of peak shifts can be handled by using up the secondary battery 38 in a short time.

  Moreover, in this embodiment, the secondary battery 38, the storage battery control unit 39, and the power conditioner 42 are accommodated in the storage battery board 7 which is a storage battery housing | casing. Therefore, the secondary battery 38, the storage battery control unit 39, and the power conditioner 42 can be accommodated together in the common storage battery panel 7.

  Further, in the present embodiment, the rated output from the secondary battery 38 when it is determined that there is a power failure is configured to be 2/3 or less of the rated output from the secondary battery 38 when linked with the system S. ing. In this case, the rated output from the secondary battery 38 when it is determined that there is a power failure can be 2/3 or less of the rated output from the secondary battery 38 when linked to the system S.

  In addition, in this embodiment, the recommended mode control instruction unit 151 and the timer mode control instruction unit 166 have a timer function for charging and discharging the secondary battery 38 at a predetermined time, and as a setting unit for setting this timer function The controller 6 is further provided indoors, and is configured such that the power of the secondary battery 38 charged, for example, at night can be discharged, for example, in the daytime without a reverse power flow by the timer function.

  In this case, during summer daytime, the residential load L1. The amount of power used by L2 increases. At that time, by increasing the rated output from the secondary battery 38 and supplying a large amount of power, a large amount of power stored in the middle of the night can be used. Even if the supply is tight, the residential load L1 such as an air conditioner can be used.

  In addition, this invention is not limited to the said embodiment, It can change in the range which does not deviate from the meaning of this invention.

1 Storage battery system 6 Controller (setting part)
7 Storage battery panel (storage battery body)
38 Secondary Battery 39 Storage Battery Control Unit 42 Power Conditioner (Charge / Discharge Control Unit)
43 Power outage switch
L1 Residential load (first load)
L2 Residential load (second load)

Claims (3)

A secondary battery,
A storage battery control unit for recognizing and controlling the state of the secondary battery;
A charge / discharge control unit for controlling charge / discharge of the secondary battery;
A power failure opening and closing part ,
During normal operation linked to the grid, the power failure switching unit is turned on to supply power from the secondary battery to the first load and the second load, and when the power failure occurs in the grid, the power failure switching unit is turned off. In a state where power from the secondary battery is supplied only to the second load,
The charging and discharging control unit, as the rated output from the secondary battery when it is determined that the power failure is less than the rated output from the secondary battery if cooperation with the system, and the A storage battery system configured to control discharge of the secondary battery so that electric power is supplied to the second load at the same voltage during normal operation and during the power failure .   The storage battery system according to claim 1, wherein the secondary battery, the storage battery control unit, and the charge / discharge control unit are accommodated in a storage battery casing. Rated output from the secondary battery when it is determined that the power failure, according to claim 1, characterized in that it is less than 2/3 of the rated output from the secondary battery if cooperation with the line or 2. The storage battery system according to 2.