JP2019079738A - Storage battery system - Google Patents

Abstract

To provide a storage battery system capable of achieving highly efficient cooling by concentrating components to be cooled.SOLUTION: A storage battery board 7 includes a secondary cell 38 repeating charge and discharge and a plurality of electrical components for controlling the secondary cell 38. Each of the electrical components is installed on an electrical component storage part 113 formed above a battery storage part 114 for storing the secondary cell 38 and the electrical components are arranged to be divided into first electrical components 128 to be cooled and second electrical components 129 not requiring cooling with an electrical component installation plate 87 sandwiched therebetween. Thus, only the first electrical components 128 requiring cooling can be cooled, being concentrated on the backward side of the electrical component installation plate 87.SELECTED DRAWING: Figure 4

Description

  The present invention relates to a storage battery system including a secondary battery and an electrical component for controlling the secondary battery.

  Generally, as shown in Patent Document 1, in this type of storage battery system, a charge / discharge control unit including an electronic component is provided above the secondary battery inside the storage battery panel as a main body, and for partitioning these two A radiator plate as a cooling component provided in the charge / discharge control unit is provided in an air path in the vertical direction of a cooling fan, which is a cooling unit, provided with a partition plate having an opening and a cooling component provided in the charge / discharge control unit. Things are disclosed.

Patent No. 5998714 gazette

  In the structure of the conventional storage battery system, since the temperature rises when the system is operating, parts to be cooled that require some cooling and other parts that do not require a significant increase in temperature are mixed, and parts to be cooled Not just in one place, but in several places inside the battery board. Therefore, the cooling range is expanded, and a cooling air passage has to be formed for each part to be cooled, and the cooling air passage becomes complicated, causing air leak and the like, and there is a problem that cooling can not be performed as expected. Also, in some cases, a cooling fan is required for each part to be cooled, resulting in an increase in cost.

  An object of the present invention is to provide a storage battery system capable of collecting parts to be cooled for efficient cooling.

  The storage battery system according to the present invention includes a secondary battery that repeats charging and discharging, and an electrical component for controlling the secondary battery, wherein the electrical component is provided above or to the side of the secondary battery. The electric component is disposed so as to separate a wall portion into a component to be cooled and a component other than the component.

  According to the invention of claim 1, by separating the parts to be cooled by the wall and the other parts on the upper side or the side of the secondary battery, only the parts that need to be cooled can be provided on one side of the wall Centralized cooling can be achieved, and the cooling air path can be simplified. Therefore, the parts to be cooled can be collected and efficiently cooled.

  According to the second aspect of the present invention, the parts to be cooled collected on the rear side of the wall can be efficiently cooled efficiently by the cooling means provided on the rear side of the same wall. In addition, since the cooling means can be removed from the front side of the wall, maintenance work such as installation and replacement of the cooling means is facilitated, and maintenance work can be performed without removing the rear face of the main body. You will be able to install the main body close.

  According to the third aspect of the invention, since the parts to be cooled can be removed together with the main circuit board assembly, the maintenance work such as the installation and replacement of the main circuit board assembly and the parts to be cooled becomes easy.

  According to the invention of claim 4, since the parts to be cooled together with the main circuit board assembly can be removed from the front side of the wall, maintenance work such as installation and replacement of the main circuit board assembly and parts to be cooled is further facilitated. become. Furthermore, since maintenance work can be performed without removing the rear surface of the main body, the rear surface can be brought close to an obstacle to install the main body.

  According to the invention of claim 5, since the parts to be cooled together with the main circuit board assembly can be removed through the opening provided in the second mounting plate, maintenance such as installation or replacement of the main circuit board assembly or parts to be cooled Work can be performed efficiently.

  According to the invention of claim 6, by making the periphery of the opening in the second mounting plate in surface contact with the first mounting plate, it is possible to prevent so-called air leak in which the cooling air leaks from the opening.

  According to the invention of claim 7, only by hooking and engaging the engaging portion of the first mounting plate to the second mounting plate, the parts to be cooled and the main circuit board assembly are installed without using unnecessary parts. It is possible to easily attach the first mounting plate to the second mounting plate that is the wall.

  According to the invention of claim 8, by gripping the handle portion of the first mounting plate, the first mounting plate can be more easily attached to the second mounting plate.

BRIEF DESCRIPTION OF THE DRAWINGS It is a systematic diagram which shows the electric constitution of the storage battery system which shows the 1st Embodiment of this invention. It is a perspective view which shows the back side of the storage battery board used as a main body same as the above. It is a front side perspective view which shows the state which removed the front panel of the storage battery board same as the above. It is a back surface side perspective view which shows the state which removed the back panel of the storage battery board same as the above. FIG. 6 is a cross-sectional view along the line AA in FIG. It is a perspective view of a lower duct part same as the above. FIG. 6 is an exploded view of the electrical component storage unit as viewed from the front side. It is an assembly exploded view of the electrical component storage part seen from the same as the above and the back side. It is the principal part enlarged view of the main circuit board seen from the same as the above and a back side. It is a perspective view of a power supply substrate attachment board same as the above. FIG. 11 is an enlarged view of an essential part in a portion B of FIG. It is a perspective view of the indoor unit of the battery system which shows the 2nd Embodiment of this invention. It is a perspective view of the indoor unit in the state which removed the panel front, the panel right part, and the panel upper part same as the above. It is a disassembled block diagram of an indoor unit same as the above. It is a perspective view of a baseplate assembly part same as the above. It is a perspective view of the baseplate assembly part at the time of battery unit attachment same as the above. FIG. 13 is an enlarged view of an essential part of the A-A cross section of FIG. It is a figure which shows the attachment method of a battery unit same as the above. FIG. 10 is an enlarged view of an essential part when the battery unit is attached, as viewed from the rear side of the indoor unit. FIG. 12 is an enlarged view of a main part of the B-B cross section of FIG. It is a three-dimensional perspective view of FIG. 20 same as the above. It is a perspective view of a panel attachment plate same as the above. It is a perspective view of the baseplate assembly part of the battery system which shows the modification of 2nd Embodiment. The battery system which shows the 3rd Embodiment of this invention WHEREIN: In the state which removed the front panel, it is a perspective view of the inside of a vehicle body when all the storage battery modules are accommodated in a battery accommodating part. It is a perspective view of a single secondary battery support lower part same as the above. It is a perspective view of the secondary battery support lower part of the state which arrange | positioned the storage battery module same as the above. It is a top view of the same rechargeable battery support lower part same as the above. It is a top view of the secondary battery support lower part of the state which arranged the storage battery module same as the above. FIG. 10 is a perspective view of the same secondary battery mounting portion as above. It is a perspective view of the secondary battery support lower part and the secondary battery attachment part of the state which arrange | positioned the storage battery module same as the above. Same as above, is an enlarged view of the main part of the launch part In the battery system which shows the modification of 3rd Embodiment, the state which removed all the storage battery modules in the state which removed the front panel is a perspective view of the inside of a machine body when it accommodates in a battery storage part. It is a perspective view of a single secondary battery support lower part same as the above. It is a top view of the same rechargeable battery support lower part same as the above. FIG. 6 is an exploded perspective view of the lower part of the secondary battery support and the bottom plate as viewed from below. It is a completed perspective view showing an assembled state of a cardboard pallet in a 4th example of the present invention. FIG. 30 is an enlarged view of a portion X in FIG. It is a figure which shows the planar shape before assembly of a cardboard pallet same as the above. FIG. 32 is an enlarged view of a portion Y in FIG. It is a principal part perspective view which shows the charge part waterproofing structure of the storage battery system in the 5th Example of this invention. It is a Z-Z line sectional view of Drawing 33 same as the above. It is a principal part perspective view which shows the charge part waterproofing structure of the conventional storage battery system. FIG. 36 is a cross-sectional view along line Z′-Z ′ of FIG.

  Hereinafter, embodiments of the stationary home storage battery system according to the present invention will be described with reference to the attached drawings. Note that, in all the drawings, common parts are given common reference numerals.

  FIG. 1 shows the electrical configuration of the storage battery system 1 in the present embodiment. In the figure, the storage battery system 1 operates using AC power from a single-phase three-wire 200 V commercial power grid S and DC power from a solar battery 2 installed outdoors in a residential site as a power source. A first residential distribution panel (hereinafter referred to as the first distribution panel) 4 installed inside the interior, ie indoors, a second residential distribution panel (hereinafter referred to as the second distribution panel) 5 and a controller 6, and a residence It is mainly comprised by the storage battery board 7 installed in the outdoors in the site.

  The three-wire first power supply line 8 whose one end is connected to the system S is constituted by two voltage lines and one neutral line not shown, and is drawn into the first distribution board 4 and wired. In addition to the contract breaker 11 with the electric power company that holds the system S, the first distribution board 4 includes a master breaker 12, a solar grid-connected breaker 13, a branch breaker 14, and a first current for detecting a load current. The transformer 15 and the like are incorporated inside, and the contract breaker 11, the master 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 to which a branch breaker 14 is inserted and connected is connected to the other end of the first power supply line 8, and the other end of the first branch line 16 is installed in a house during power failure. An in-house load L1 is connected as a first load to be backed up. The first branch line 16 is a three-wire system by the two voltage lines and one neutral line described above, or a two-wire system by any one voltage line and the neutral line. The in-house load L1 connected to the electronic board 4 is configured to be supplied with either AC 200 V or AC 100 V via the first branch line 16.

  In addition, the first distribution board 4 is connected to the second power supply line 17 connected to the storage battery board 7 via the second distribution board 5 and the power conditioner 18 for photovoltaic power generation installed in the house. The third power supply lines 19 are respectively drawn and wired. Each of the second power supply line 17 and the third power supply line 19 is a three-wire type, and can supply 200 V AC, and one end of the second power supply line 17 is connected to the first branch line 16 with a first current transformer 15 The other end of the third power supply line 19 is connected to the connection point between the contract breaker 11 and the master breaker 12. Further, the above-described solar light coupled breaker 13 is inserted and connected to the third power supply line 19.

  The solar cell 2 constitutes a solar power generation system 21 together with a power conditioner 18, converts sunlight into DC power, and sends it to the power conditioner 18. In addition, the power conditioner 18 has a function as a power converter that converts DC power from the solar cell 2 into AC power. The power conditioner 18 is connected to a third power supply line 19 for supplying an AC voltage of 200 V, and is provided with a socket (not shown) that enables the AC voltage of 100 V to stand on its own. A power plug 23 connected to one end of a two-wire auxiliary power supply line 22 is attached to this insertion port, and the other end of the auxiliary power supply line 22 is 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. Thus, in a normal state in which predetermined power is normally supplied from system S, power conditioner 18 supplies AC power to first power supply line 8 via third power supply line 19, and the power is stored in storage battery system 1 side. The surplus power is sent to the system S to sell electricity to the electric power company, and at the time of a so-called power outage when the power supply from the system S is cut off, the power conditioner 18 performs self-sustaining output, and the auxiliary power supply line 22 AC power is supplied to the second power supply line 17 via the

  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 supply line 17 and the auxiliary power supply line described above. 22 are wired to the second distribution board 5, respectively. Further, a main 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 supply line 17 is routed from the second distribution board 5 installed indoors to the storage battery board 7 installed outdoors, but in the middle of the second power supply line 17 in the second distribution board 5 A two-wire type first feeder 30 connected at its one end is wired, and a two-wire second feeder 31 connected at its end in the middle of the second power supply line 17 in the storage battery panel 7 as well. , From the battery board 7 to the second distribution board 5 and wired. The other end of the first feeder 30 is connected to the middle of the second feeder 31 in the second distribution board 5.

  The switching circuit 29 is composed of a manually operable operating body 32 and two series of contacts 33 and 34 linked to the operating body 32. These contacts 33 and 34 are the first power supply line 30 and the second Each is connected to the feed line 31. Further, in the second feeder 31, a main breaker 26 is inserted and connected between a connection point with the first feeder 30 and the other end. In the switching circuit 29, the contact 33 is turned off and the contact 34 is turned on at the time of normal use, and in the emergency, the contact 33 can be turned on and the contact 34 can be turned off by the operation of the operation body 32.

  One end of the second branch line 35 to which the branch breaker 28 is inserted and connected is connected to the other end of the second feeder line 31, and the other end of the second branch line 35 is installed in a house during power failure backup An in-house load L2 is connected as a second target load. Since all of the second branch lines 35 are of a two-wire type, the in-house load L2 connected to the second distribution board 5 is configured to be supplied with only AC 100 V via the second branch lines 35. .

  The contract breaker 11, the master breaker 12, the solar grid-connected breaker 13, and the branch breaker 14 incorporated in the first distribution board 4 described above, the master breaker 25 incorporated in the second distribution board 5, the master breaker 26, the circuit Each of the breaker 27 and the branch breaker 28 has a function of interrupting the circuit when an overcurrent flows therein. Therefore, it is assumed that each of these breakers 11 to 14 and 25 to 28 is always in the on state, unless otherwise noted.

  A storage battery panel 7 constituting an outdoor unit of the storage battery system 1 is mounted with a secondary battery 38 which is a chargeable / dischargeable storage battery, and a battery including the secondary battery 38, a storage battery control unit (BMU: Battery Management Unit) 39, etc. 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 includes six storage battery modules MDL1 to MDL6 in which two lithium ion battery cells (not shown) connected in series are connected in parallel. Battery cell management modules CMU1 to CMU6 are provided in storage battery modules MDL1 to MDL6, respectively. The battery cell management modules CMU1 to CMU6 transmit, to the storage battery control unit 39, monitoring results such as battery voltage (charge amount and remaining amount) and temperature for each battery cell of the corresponding storage battery modules MDL1 to MDL6. In response to the control signal from 39, the battery voltage of each battery cell is adjusted to an appropriate range. The storage battery modules MDL1 to MDL6 are respectively inserted in and connected to the DC line 46 routed from the power conditioner 42 to the battery system 41.

  The battery system 41 is additionally provided with a cutting machine 47, switches 48 and 49, and a current detector 50. A cutting machine 47 provided for maintenance is inserted and connected to a DC line 46 between a group of one storage battery modules MDL1 to MDL3 connected in series and a group of other storage battery modules MDL4 to MDL6 connected in series. At the time of maintenance and inspection of the battery system 41 or the like, the cutting machine 47 is manually operated to disconnect the series line 46, so that sudden electric shock due to 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 disposed 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 charge / discharge 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 Inserted into

  The storage battery control unit 39 recognizes and controls the state of the secondary battery 38. Specifically, the storage battery control unit 39 receives detection signals from the battery cell management modules CMU1 to CMU6, the cutting machine 47 and the current detector 50. , Send control signals to each of the battery cell management modules CMU1 to CMU6 so that appropriate control is performed on the secondary battery 38, and turn on the switches 48 and 49 when the secondary battery 38 operates normally. Control signals are sent to the switches 48 and 49 so that the switches 48 and 49 are turned off when the secondary battery 38 is abnormal or checked. In addition, the storage battery control unit 39 recognizes 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 described above. It has a function to send to the

  The second power supply line 17 from the second distribution board 5 is drawn around and wired to the power conditioner 42 described above, and a second power supply line 52 in parallel with the second power supply line 17. Is connected. The power conditioner 42 also includes a power conversion unit 53 that performs power conversion between the grid S and loads L1 and L2 in the house and the secondary battery 38, a control board 54 that supplies a drive signal to the power conversion unit 53, The operation power supply unit 55 supplies 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.

  Power conversion unit 53 serially connects DC / AC conversion circuit 61 connected to the side of second power supply line 17 and DC / DC conversion circuit 62 connected to the side of DC line 46, and outputs a command signal from control board 54. And a gate drive circuit 63 for supplying predetermined pulse drive signals to control terminals, that is, gates, of semiconductor switching elements constituting the DC / AC conversion circuit 61 and the DC / DC conversion circuit 62. The DC / AC conversion circuit 61 as an inverter of the power conversion unit 53 converts AC power from the second power supply line 17 into DC power and converts it into DC / DC conversion circuit 62 along with switching operation of the built-in semiconductor switching element. It has a function of transmitting or converting DC power from the DC / DC conversion circuit 62 into AC power and transmitting it to the second power supply line 17. Further, 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 along with the switching operation of the built-in semiconductor switching element. The DC voltage from the secondary battery 38 is boosted to a voltage level suitable for normal operation of the residential loads L1 and L2.

  In this embodiment, a switching element module 76 in which a plurality of switching elements are packaged is mainly used as a semiconductor switching element constituting the DC / AC conversion circuit 61 and the DC / DC conversion circuit 62, and an IGBT (Insulated Gate) is used as a spare. Bipolar Transistor: Insulated Gate Bipolar Transistor) 77 (see FIG. 5).

  The operating power supply unit 55 includes a diode 64 and a control power supply circuit 65 as a DC / DC converter, and sends out a DC voltage generated across the DC line 46 to the control power supply circuit 65 via the diode 64. A noise component is removed through a noise filter 66 mounted on the 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 operating voltage, and the automatic voltage regulators 67 and 68 are 12 V and 24 V for generating DC. In particular, the operating voltage of DC 12 V 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 via the operating voltage line 69. There is.

  The operation power supply unit 55 further includes an AC / DC conversion circuit 58, and has a function of converting an AC voltage generated in the second power supply line 17 into another operation voltage of 5 V DC, for example. In addition, another AC / DC conversion circuit 59 configured of a transformer and a diode is provided in the second power supply line 17, and even when the operation of the storage battery system 1 is stopped, the second power supply line 17 A DC voltage is sent out to the control power supply circuit 65 and the noise filter 66 through the AC / DC conversion circuit 59.

  The power conditioner 42 uses the control signal transmitted from the controller 6 via the control line 71 and the signal that recognizes 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 board 7 as a charge / discharge control part which controls the charge and discharge of the drive of the conversion part 53 and by extension the secondary battery 38. The control signal from the controller 6 and the signal recognizing the state of the secondary battery 38 from the storage battery control unit 39 are both sent to the control board 54 mounted on the power conditioner 42, and appropriate command signals based on these signals Is supplied from the control substrate 54 to the gate drive circuit 63, and the 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 charge current to the secondary battery 38 or the discharge 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 storage battery panel 7, control board 54 is inserted into first current transformer 15 inserted and connected to first power supply line 8, second current transformer 73 inserted and connected to second power supply line 17, and second power supply line 31. It has a function of receiving each detection signal from the connected third current transformer 74 and monitoring 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, respectively. The control board 54 also generates an auxiliary power supply line 22 in addition to the first relay 75 for detecting the presence or absence of a voltage generated in the second power supply line 17 as a component for outputting a detection signal for determining the occurrence of a power failure. The first switch 77 provided on the DC line 46, the second switch 79 provided on the auxiliary power supply line 22, and the second switch 79 have a function of receiving each detection signal from the second relay 76 for detecting the presence or absence of voltage. It is connected to the maintenance switch 44 provided on the 2 power supply line 17 and the second feeder 31 so that the on / off of the switches 77 and 79 and the maintenance switch 44 can be controlled individually. doing.

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

  The noise filter 66, the automatic voltage regulators 67, 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 The two switches 79 are all mounted in the storage battery panel 7. Besides, the third relay 81 is mounted in the storage battery panel 7 and the fan 45 for forcibly cooling the heat generating components in the storage battery panel 7 by the control signal supplied from the control board 54 to the third relay 81 is turned on or off. It is configured to control the operation, and although not shown here, DC reactor (DCL) 78 (see FIG. 4) and AC reactor (ACL) 79 (see FIG. 4) that reduce harmonics are also power. It is mounted in the storage battery board 7 as an electronic component which comprises the conditioner 42. As shown in FIG.

  The controller 6 provided indoors is connected by wire to the storage battery panel 7 installed outdoors by the above-mentioned operating voltage line 69 and control line 71. The controller 6 operates with the operating voltage from the operating voltage line 69, and sends out a charge signal or a discharge signal as a control signal to the control board 54 mounted on the power conditioner 42 of the storage battery board 7 through the control line 71. ing.

  Next, the structure of the storage battery panel 7 in a present Example is demonstrated, referring FIGS. In FIG. 2, storage battery panel 7, which is the main body of storage battery system 1, has six sides surrounded by an exterior panel consisting of upper panel 101, lower panel 102, front panel 103, rear panel 104, right panel 105, and left panel 106. It has a rectangular parallelepiped appearance. The rear panel 104 also has an air inlet 108 and an air outlet 109. Further, at the lower portion of the lower panel 102, a leg portion 110 which can be placed on the outdoor installation surface is provided.

  The internal structure of storage battery board 7 with front panel 103 removed will be described based on FIG. 3. Here, inside the storage space surrounded by four vertical frames 111 erected at the four corners of lower panel 102, It is configured to accommodate various devices. In addition, by the partition plate 112 connecting middle stages of the vertical frames 111, the inside of the storage battery panel 7 is an electrical component in which various electronic components such as the storage battery control unit 39 and the fan 45 including the fan motor 84 are accommodated. While the housing portion 113 is used, the lower side is partitioned so as to be the battery housing portion 114 in which the secondary battery 38 is housed. The electrical component storage unit 113 may be provided not on the upper side of the battery storage unit 114 but on the side of the battery storage unit 114. The battery accommodating portion 114 is provided with a first shelf plate 115 and a second shelf plate 116 at upper and lower two stages at substantially equal intervals between the partition plate 112 and the lower panel 102, and the partition plate 112 and the first shelf plate 116 A pair of storage battery modules MDL 3, MDL 4 between the shelf plate 115, a pair of storage battery modules MDL 2, MDL 5 between the first shelf plate 115 and the second shelf plate 116, a second shelf plate 116 and a lower panel A pair of storage battery modules MDL1 and MDL6 are respectively disposed between them.

  Reference numeral 125 denotes a terminal block cover fixed to the right panel 105 of the storage battery panel 7. The terminal block cover 125 corresponds to a cover that covers the terminal block 126 attached to the inside of the right side surface of the storage battery panel 7, and the lower side thereof is for drawing out the wiring (not shown) connected to the terminal block 126 to the outside , And an opening 127 is provided. In addition, the waterproof structure of the terminal block 126 used as the charge part of the storage battery system 1 is demonstrated in detail with another Example mentioned later.

  FIG. 4 shows the internal structure of the storage battery panel 7 with the back panel 104 removed. In the figure, cooling of the switching element module 76, the IGBT 77, the DCL 78, the ACL 79, etc., all of which constitute the power conditioner 42, is required on the upper part of the secondary battery 38 housed in the battery housing portion 114. An electric component mounting plate 87 is provided for separately arranging the first electric component 128 and the second electric component 129 (see FIG. 3) which does not require cooling of the storage battery control unit 39 and the like. A fan 45 having a fan motor 84 as a driving source as a cooling means is directly attached to a fan motor mounting plate 91 which forms a part of the electric component mounting plate 87. The first electric component 128 is mounted on the power supply substrate mounting plate 80 and the main circuit board 81 described later, while the second electric component 129 is mounted on the electric component assembly 82 (see FIG. 3), and the main circuit thereof The substrate 81 and the electrical component assembly 82 are attached to the power supply substrate mounting plate 80. Then, the power supply substrate attachment plate 80 is attached to the electric component attachment plate 87.

  In the present embodiment, the electric component mounting plate 87 as a wall portion is vertically disposed so as to divide the internal space of the electric component storage portion 113 back and forth, and on the front side via the electric component mounting plate 87 While the second electric component 129 where the temperature does not increase so much during operation of the storage battery system 1 is disposed, the temperature rises during operation of the storage battery system 1 on the rear side of the electric component mounting plate 87 The required first electrical component 128 is placed. Furthermore, on the rear side of the electric component mounting plate 87, the partition plate 116 partitions the place where the fan 45 is attached and the place where the power supply substrate attaching plate 80 is attached, and the fan 45 and the first electric component 128 are partitioned The first electrical component 128 is collected and installed on the rear side of the electrical component mounting plate 87 so as to be separated by 116.

  On the rear side of the electric component mounting plate 87, a duct for efficiently guiding cold air drawn from the air inlet 108 to the second electric component 129 and discharging the air from the exhaust port 109 when the fan 45 operates by energizing the fan motor 84. The lower duct portion 117 and the upper duct portion 118 are disposed so as to overlap with each other. In FIG. 4, in order to illustrate the lower duct portion 117 and the DCL 78 and the ACL 79 mounted on the main circuit board 81, the top plate portion in the vertical direction of the upper duct portion 118 is omitted.

  FIG. 5 is a cross-sectional view taken along line A-A in FIG. In the figure, the power supply substrate mounting plate 80 is mounted on the front side of the electric component mounting plate 87 in contact with the electric component mounting plate 87 in a plane perpendicular to the electric component mounting plate 87. The second electrical component 129 mounted on the electrical component assembly 82 is disposed on the front side thereof. On the other hand, the switching element module 76, the IGBT 77, the DCL 78, the ACL 79, etc. are arranged as the first electric component 128 requiring cooling on the rear side of the electric component mounting plate 87, as shown in FIG. A metal heat dissipating fin 83 with good thermal conductivity is attached to the protruding surface of the element module 76 and the IGBT 77. The heat dissipating fins 83 here are also disposed on the rear side of the electrical component mounting plate 87 as the first electrical components 128 that need to be cooled, and the switching element module 76, the IGBT 77 and the heat dissipating fins 83 are mounted on the common main circuit board 81. By doing this, they are configured as a unitized main circuit board assembly 130.

  The lower duct portion 117 penetrates the partition plate 116 from the exhaust port of the fan 45 so as to allow the fan 45 and the first electric component 128 to communicate with each other, and surrounds the switching element module 76, the IGBT 77 and the radiation fin 83, It is installed on the rear side of the electrical component mounting plate 87. With such a configuration, a cooling air path from the fan 45 to the switching element module 76, the IGBT 77, and the radiation fin 83 is formed, and these first electric components 128 can be cooled efficiently.

  As shown in FIG. 6, below the lower duct portion 117, openings 119 and 119 are formed, which serve as outlets for the wind passing through the lower duct portion 117. Referring back to FIG. 5, the lower duct portion 117 is arranged such that the DCL 78 and the ACL 79 surrounded by the upper duct portion 118 are directly below the openings 119 and 119 as the first electric component 128 requiring cooling. Is placed. The openings 119 and 119 are preferably formed in accordance with the number of the first electrical components 128 disposed below the lower duct portion 117, and another upper duct portion 118 is formed through the openings 119 and 119 of the lower duct portion 117. Thus, a cooling air passage to the DCL 78 and the ACL 79 is formed, and the DCL 78 and the ACL 79 can be cooled more effectively.

  The upper duct portion 118 is attached to the electrical component mounting plate 87 together with the lower duct portion 117 so as to surround the DCL 78 and the ACL 79 and the lower duct portion 117. Further, the upper duct portion 118 has an opening (not shown), and when the rear panel 104 is attached, the opening and the exhaust port 109 communicate with each other.

  As a result, inside the storage battery panel 7, the air taken in from the air inlet 108 of the rear panel 104 passes through the lower duct portion 117 by the fan 45 in operation, thereby removing heat from the heat dissipating fins 83 to cool the heat dissipating fins 83. And cool the switching element module 76 and the IGBT 77 attached to the heat dissipating fins 83 together therewith. Further, the cooling air having passed through the openings 119 and 119 of the lower duct portion 117 cools the DCL 78 and the ACL 79 by hitting the DCL 78 and the ACL 79, and thereafter the rear panel 104 is passed through the opening of the upper duct portion 118. A cooling air passage is formed which is discharged from the exhaust port 109 to the outside of the storage battery panel 7.

  Thus, in the present embodiment, the first electrical component 128 cooled by the electrical component mounting plate 87 and the second electrical component 129 not requiring cooling are separated above the battery housing portion 114 housing the secondary battery 38. Be done. Therefore, only the first electric component 128 can be concentrated and cooled on the rear side of the electric component mounting plate 87, and the cooling air path to the first electric component 128 by the lower duct 117 and the upper duct 118 is also after the electric component mounting plate 87. It can be simple, just on the side. Further, the first electric component 128 collected on the rear side of the electric component mounting plate 87 is forcibly and efficiently cooled by the fan 45 similarly provided on the rear side of the electric component mounting plate 87.

  The structure of the electrical component storage unit 113 will be described in more detail with reference to FIGS. 7 and 8. FIG. 7 is an exploded view of the electric component storage portion 113 seen from the front panel 103 side on the front side of the storage battery board 7, and FIG. 8 is viewed from the rear panel 104 side on the back side of the storage battery board 7. FIG. 7 is an exploded view of the electrical component storage unit 113.

  In each of these drawings, the electric component mounting plate 87 is parallel to the front panel 103 and the rear panel 104, and separates the front and rear sides of the electric component housing portion 113, as seen from the front of the storage battery panel 7. A fan opening 121 is formed at the installation place of the fan 45, and an electric component mounting plate opening 122 is formed at the installation place of the power supply substrate mounting plate 80, respectively. The fan opening 121 of the present embodiment is formed in the same shape as the outer periphery of the main body of the fan 45, and after removing the front panel 103, the electric component is passed through the fan opening 121 from the front side of the electric component mounting plate 87. With the fan 45 disposed on the rear side of the mounting plate 87, the fan 45 can be attached to or removed from the electrical component mounting plate 87 using a fastening member such as a screw (not shown).

  That is, since the fan 45 can be attached and removed from the front side of the electric component mounting plate 87, maintenance work such as installation and replacement of the fan 45 is facilitated. Further, even if the rear panel 104 forming the rear surface portion of the storage battery panel 7 is not removed, maintenance work of the fan 45 can be performed, and the rear surface of the storage battery panel 7 can be installed close to an obstacle such as a wall.

  Further, the electric component mounting plate opening 122 which is different from the fan opening 121 is vertically installed so that the power supply substrate mounting plate 80 to which the main circuit board assembly 130 is previously attached is in surface contact with the electric component mounting plate 87 So that the switching element module 76, the IGBT 77, the DCL 78, the ACL 79, and the radiation fin 83, which are the first electric component 128, are disposed on the rear side of the electric component mounting plate 87. It is formed in a small rectangular shape. The electric component mounting plate opening 122 may be formed so as to open only at the installation place of the first electric component 128.

  With this configuration, after the front panel 103 is removed, the first electric component 128 is disposed on the rear side of the electric component mounting plate 87 through the electric component mounting plate opening 122 from the front side of the electric component mounting plate 87 In this state, the power board mounting plate 80 together with the first electrical component 128 can be attached to or detached from the electrical component mounting plate 87 by using a fastening member such as a screw (not shown). In addition, when the power supply substrate mounting plate 80 is attached to the electric component mounting plate 87, the power supply substrate mounting plate 80 is in surface contact with the front side surface around the electric component mounting plate opening 122 in the electric component mounting plate 87. The cooling air can be prevented from leaking from the plate opening 122.

  In addition to the main circuit board assembly 130, DCL 78 and ACL 79 forming a part of the first electric component 128 and an electric component assembly 82 including the second electric component are attached to the power supply substrate mounting plate 80. The power supply substrate mounting plate 80 of the present embodiment is configured by forming an opening 80b in the vertical surface 80a in contact with the electric component mounting plate 87 (refer to FIG. 10), and on the rear side of the vertical surface 80a. , DCL 78 and ACL 79 are attached. In the main circuit board assembly 130, the main circuit board 81 is mounted on the front side of the vertical surface 80a of the power supply board mounting plate 80 with the switching element module 76 and the IGBT 77 penetrating the opening 80b of the power supply board mounting plate 80. As a result, the main circuit board assembly 130 can be attached to or removed from the front side of the electric component attachment plate 87 together with the power supply substrate attachment plate 80.

  That is, in this embodiment, since the switching element module 76 and the IGBT 77 to be the first electric component 128 can be attached and detached together with the main circuit board assembly 130, the main circuit board assembly including the switching element module 76 and the IGBT 77 Maintenance work such as installation and replacement of 130 is facilitated. Furthermore, together with the main circuit board assembly 130, the switching element module 76 and the IGBT 77 are attached from the front side of the front side wall of the electric component mounting plate 87 through the electric component mounting plate opening 122 which becomes the opening of the electric component mounting plate 87. Since the maintenance work is further facilitated since maintenance work can be performed without having to remove the rear panel 104 forming the rear face portion of the storage battery board 7, the rear face of the storage battery board 7 can be removed. Can be placed close to obstacles such as walls.

  On the other hand, the electric component assembly 82 is attached to the power supply substrate mounting plate 80 with a gap from the main circuit substrate 81 to the front side, and the main circuit substrate assembly 130 and the electric component assembly 82 are configured not to interfere with each other. . Thus, by attaching the main circuit board assembly 130 and the electric component assembly 82 to the common power supply substrate mounting plate 80, the first electric component 128 and the second electric component 129 are on one side and the other side of the electric component mounting plate 87. Although they are separately arranged, wiring between the electrical components 128 and 129 is simplified and noise from the wiring is reduced. Also, the power circuit board mounting plate 80 is attached to the electrical component mounting plate 87 in a state where the main circuit board assembly 130, the DCL 78 and the ACL 79, and the electrical component assembly 82 are incorporated in the power circuit board mounting plate 80 in advance. The electric component 128 and the second electric component 129 can be attached to the battery panel 7 at one time and can be removed at the same time in the reverse procedure. Instead, the opening 80 b is formed larger than the outer shape of the heat dissipating fins 83 first. After mounting the power supply board mounting plate 80 incorporating DCL 78 and ACL 79 to the electric parts mounting plate 87, mount the main circuit board assembly 130 and the electric parts assembly 82 in order to the power supply board mounting plate 80 it can.

  The partition plate 116 is formed with a cutout portion 123 which allows the lower duct portion 117 to penetrate from the fan 45 toward the radiation fin 83. In this embodiment, the heights of the switching element module 76, the IGBT 77 and the radiation fin 83, the height of the fan 45, and the height of the notch 123 are substantially the same on the rear side of the electric component mounting plate 87. Ru. As a result, the cooling air path from the fan 45 to the switching element module 76, the IGBT 77, and the radiation fin 83 can be made linear and shortest in the lateral direction only in the electric component housing 113 and can be most simplified. Therefore, these first electrical components 128 can be cooled more effectively.

  The structure of the power supply board mounting plate 80 will be described in more detail with reference to FIGS. 10 and 11. FIG. 10 is a perspective view of the power supply substrate mounting plate 80 alone, and FIG. 11 is an enlarged view of an essential part in a portion B of FIG.

  When the main circuit board 81 and the electric component assembly 82 are assembled to the power supply substrate mounting plate 80, it is difficult to attach the assembly of the power supply substrate mounting plate 80 to the electric component mounting plate 87 because of the considerable weight as a whole. was there. Therefore, the power supply substrate mounting plate 80 of the present embodiment is configured to include handle portions 80c and 80c and downward L-shaped claw portions 80d and 80d on both sides of the vertical surface portion 80a. When attaching the assembly of the power supply substrate mounting plate 80 to the electric component mounting plate 87, the handle portions 80c, 80c have a function as a gripping portion that can be gripped by a person. In the present embodiment, the handle portions 87c and 87c are provided on the power supply substrate attachment plate 80, but instead of the power supply substrate attachment plate 80, for example, the handle portions 80c and 80c are provided on the main circuit board 81 or the electrical component assembly 82. When assembling the power supply substrate mounting plate 80, the handle portions 80c and 80c may be provided in this assembly. Further, the electric component mounting plate 87 is provided with openings (not shown) as engagement receiving portions corresponding to the claw portions 80d, 80d to be engaging portions, and these openings are provided with the claw portions 80d, The power supply board mounting plate 80 can be easily attached to the electric component mounting plate 87 by surface contact by hooking and engaging 80 d. As described above, in this embodiment, the handle portions 80c and 80c provided for the assembly of the power supply substrate mounting plate 80 are gripped, and the claw portions 80d and 80d are engaged with the corresponding openings. In the present embodiment, the assembly can be attached to the electric component attachment plate 87, and the power supply substrate attachment plate 80 can be attached from the front panel 103 side, which is the front face, as described above.

  As described above, the storage battery system 1 of the present embodiment includes the storage battery panel 7 having a rectangular parallelepiped shape, and the storage battery panel 7 includes a plurality of secondary batteries 38 that repeat charging and discharging, and a plurality of secondary batteries 38 for control. The electric components are provided in an electric component storage portion 113 formed above the battery storage portion 114 for storing the secondary battery 38 or on the side of the battery storage portion 114, The electric component mounting plate 87 serving as a wall portion is arranged to be separated into a first electric component 128 serving as a component to be cooled and a second electric component 129 serving as a component not requiring cooling other than that. .

  In this case, the cooling is performed by separating the first electric component 128 cooled by the electric component mounting plate 87 and the other second electric component 129 not requiring cooling on the upper side or the side of the secondary battery 38. Can be concentrated on one side of the electrical component mounting plate 87 and the cooling air path to the first electrical component 128 can also be cooled. It can be made simple on the side only. Therefore, storage battery unit 1 capable of collecting and efficiently cooling first electric component 128 to be cooled can be provided.

  In addition, in the storage battery system 1 of the present embodiment, as a cooling means for cooling the electric component, the first electric component 128 is further provided with the fan 45 for forcibly blowing air to the electronic component by energizing the fan motor 84. The fan 45 is disposed on the rear side of the electric component mounting plate 87, and the fan 45 is disposed on the rear side of the electric component mounting plate 87 which is the same side as the first electric component 128. It is configured to be removable.

  In this case, it is possible to forcibly and efficiently cool the cooling parts collected on the rear side of the electric component mounting plate 87 by the cooling means provided on the rear side of the same electric component mounting plate 87. In addition, since the fan 45 can be removed from the front side of the electric component mounting plate 87, maintenance work such as installation and replacement of the fan 45 is facilitated, and the fan 45 can be removed without removing the rear panel of the storage battery board 7 as a main body. Because maintenance work can be performed, the rear panel can be brought close to an obstacle to install the storage battery panel 7.

  Further, in the present embodiment, a unitized main circuit board assembly 130 on which the first electric component 128 to be cooled is further provided, and the main circuit board assembly 130 is removed from the electric component mounting plate 87 The first electrical component 128 installed in the assembly 130 is also configured to be removed from the electrical component mounting plate 87.

  In this case, since the first electric component 128 to be cooled together with the main circuit board assembly 130 can be removed, maintenance work such as installation and replacement of the main circuit board assembly 130 and the first electric component 128 is facilitated.

  Further, in the storage battery system 1 of the present embodiment, the main circuit board assembly 130 can be detached from the front side of the electric component mounting plate 87.

  In this case, since the first electric component 128 can be removed from the front side of the electric component mounting plate 87 together with the main circuit board assembly 130, maintenance work such as installation or replacement of the main circuit board assembly 130 or the first electric component 128 Will be easier. Furthermore, since maintenance work of the main circuit board assembly 130 and the first electric component 128 can be performed without removing the rear surface portion of the storage battery panel 7, the rear surface can be brought close to an obstacle to install the main body.

  Further, in the present embodiment, the main circuit board assembly 130 and the power supply board mounting plate are mounted on the second mounting plate which is the electric circuit board mounting plate 87 installed on the power supply board mounting plate 80 serving as the first mounting plate. An electrical component mounting plate opening 122 is provided as an opening through which the first electrical component 128 installed at 80 passes.

  In this case, the first electric component 128 installed on the main circuit board assembly 130 or the power supply board mounting plate 80 may be removed together with the main circuit board assembly 130 through the electric component mounting plate opening 122 provided in the electric component mounting plate 87. Since this can be performed, maintenance work such as installation and replacement of the main circuit board assembly 130 and the first electric component 128 can be efficiently performed.

  Further, in the present embodiment, in a state where the power supply substrate mounting plate 80 is attached to the electric component mounting plate 87, the power supply substrate mounting plate 80 makes surface contact with the surface of the electric component mounting plate 87 having the electric component mounting plate opening 122. It is a structure.

  In this case, by bringing the periphery of the electrical component mounting plate opening 122 in the electrical component mounting plate 87 into surface contact with the power supply substrate mounting plate 80, it is possible to prevent so-called air leakage where cooling air leaks from the electrical component mounting plate opening 122.

  Further, the power supply substrate mounting plate 80 of the present embodiment is provided with the claw portion 80 d as an engaging portion engaged with the electric component mounting plate 87.

  In this case, the first electric component 128 or the main circuit can be obtained simply by hooking the claw 80d serving as the engagement portion of the power supply substrate mounting plate 80 to the opening of the electric component mounting plate 87 and engaging it. It becomes possible to easily attach the power supply substrate mounting plate 80 on which the substrate assembly 130 is installed to the electric component mounting plate 87 which is a wall.

  Further, the power supply substrate mounting plate 80 of the present embodiment is provided with a handle portion 80c for gripping.

  In this case, when a person grips the handle portion 80c of the power supply substrate mounting plate 80, the power supply substrate mounting plate 80 can be more easily attached to the electric component mounting plate 87.

  About the 2nd Example of the storage battery system 1 of this invention, the structure is demonstrated with reference to FIGS. 12-23. In storage battery system 1 in this case, battery system 41 including secondary battery 38 and storage battery control unit 39 for controlling these in storage battery panel 7 is made indoors, ie, indoor equipment, and battery system 41 has a plate shape fixed in the room. The bottom plate assembly 137 is provided at the lower part thereof, and the bottom plate assembly 137 is mainly composed of two parts, the bottom plate lower portion 147 and the bottom plate upper portion 148. The other electrical wiring configuration is common to the system diagram shown in FIG.

  A storage battery panel 7 as a stationary home storage battery of the prior art has been installed outdoors. Therefore, the following problems occurred. First, since the storage battery panel 7 is an outdoor unit, an installation space is required outdoors. Second, since battery panel 7 is an outdoor unit, it is necessary to protect battery system 41, which is a charging unit, from rain water and dust which is constantly exposed to wind and rain and which enters from the air inlet and outlet. The appearance part of 7 also needs to be protected, so the structure of the battery panel 7 is complicated in order to protect the battery system 41 from rain water and dust while cooling. Third, the battery board 7 is charged even in the middle of the night, but it is necessary to operate a cooling fan or the like for cooling the charging unit during charging, and the operation noise of a cooling fan or the like which is not noticeable in the daytime is anxious, There was a risk of developing noise problems.

  Therefore, in the present embodiment, as shown in FIG. 12 to FIG. 23, the above problem is solved by incorporating the battery system 41 provided in the storage battery panel 7 into the indoor unit 131 installed indoors. As shown in FIG. 12, the indoor unit 131 has a rectangular parallelepiped appearance by an exterior body including a panel front part 132, a panel left part 133, a panel right part 134, a panel upper part 135, and a bottom plate assembly part 137. There is. The back surface of the indoor unit 131 is open, and as described later, since the bottom plate assembly portion 137 is directly attached to the floor F on the lower surface of the indoor unit 131, a hole or the like is made in the exterior body of the indoor unit 131. It is comprised so that the lead wire from the wall W or the floor F can be wired without. The panel front portion 132, the panel left portion 133, the panel right portion 134 and the panel upper portion 135 are fixed at predetermined positions by, for example, screws 138 serving as fastening members, and the panel left portion 133 and panel right as described later. When the panel mounting plates 139, 139... Abut against the lower part of the portion 134 from the inside, positioning and support of the panel left portion 133 and the panel right portion 134 are performed.

  The indoor unit 131 is fixed to the floor F in the room, and is preferably installed in a dead space, for example, in a closet or under a stair. If the indoor unit 131 is installed in such a space, only the installation space for the indoor unit 131 can be secured, and there is a risk that it may be difficult to mount the components from the side of the indoor unit 131. The space above the indoor unit 131 may be secured only to the extent that the head of the worker can enter, so it is assumed that the working space of the worker is only the space in front of and above the indoor unit 131. Therefore, as described later, the indoor unit 131 is unitized into a box shape so as to be easily installed.

  The internal structure of the indoor unit 131 will be described based on FIGS. 13 and 14. FIG. 13 is a perspective view of the indoor unit 131 with the panel front portion 132, the panel right portion 134 and the panel upper portion 135 removed, and FIG. 14 is an exploded configuration view of the indoor unit 131. In FIG. 13, the indoor unit 131 is installed such that the lower surface of the indoor unit 131 is in surface contact with the floor F in the room, and the back of the indoor unit 131 is in contact with the wall W of the room.

  A bottom plate assembly 137 that forms the bottom of the indoor unit 131 is installed on the floor F. Two battery units 141 and 141 each including two storage battery modules MDL1 and MDL2 (see FIG. 17) and two storage battery modules MDL3 and MDL4 (both not shown) are installed on the bottom plate assembly portion 137. The electric component unit 142 provided with the electric components of the battery system 41 such as the storage battery control unit 39 is disposed above it. Each of the battery units 141 includes a top plate portion 141a, a battery unit main body portion 141b, a lower plate portion 141c, and a collar 141d. The top plate portion 141a and the lower plate portion 141c have substantially the same size. It is formed one size larger than the horizontal cross section of the battery unit main part 141b.

  Here, while the four corners of the lower plate portion 141c are all formed at right angles, the rear two corners of the top plate portion 141a are formed at right angles, and the two front corners are rounded. Then, bolt holes (not shown) are formed at the four corners of the lower plate portion 141c and the two corners of the top plate portion 141a formed at right angles, and the hole portions at the rear two corners of the lower plate portion 141c (see FIG. Two collars 141 d are respectively disposed between the not shown) and the holes (not shown) at the rear 2 corners of the top plate portion 141 a. The collar 141d is formed in a hollow tubular shape, and the long bolt 143 of the handle passes through the holes of the top plate portion 141a and the lower plate portion 141c and the collar 141d between them, and is fixed to the bottom plate assembly portion 137 by cotightening. It can be done. Also, in the holes at the two front corners of the lower plate portion 141c, the short bolt 144 of the handle can penetrate and be fixed to the bottom plate assembly portion 137, and by fixing the four corners of the lower plate portion 141c with the bolts 143 and 144, The battery unit 141 is configured to be fixed to the bottom plate assembly 137.

  The top plate portion 141a has an opening 145 for lead wire insertion at the front, and a lead wire led to the battery unit 141 through the opening WO of the wall W and the opening FO of the floor F, and an electric component unit Lead wires from 142 are wired to the storage battery modules MDL1 to MDL4 in the battery unit 141 through the openings 145.

  The electric component unit 142 has a substantially rectangular parallelepiped shape, and has fixing portions 142a and 142a protruding from the left and right side surfaces. The electric component unit 142 is disposed above the battery units 141, 141 by fixing the fixing portions 142a, 142a to the panel left portion 133 and the panel right portion 134 and suspending the electric component unit 142. In addition, the electrical component unit 142 has a panel portion 142b on the front side, in which connectors, terminal blocks, switches, etc. are arranged, and from here to outside the wiring through the opening WO of the wall W and the opening FO of the floor F In addition to pulling out and wiring to the storage battery modules MDL1 to MDL4 through the opening 145, the operation of the electrical component unit 142 is performed through the panel portion 142b. In the present embodiment, the panel portion 142 b is configured to be disposed behind the opening portion 145 so that the panel portion 142 b and the opening portion 145 do not interfere with each other. In the space in front of the panel portion 142 b, it is assumed that many lead wires related to wiring to the electrical component unit 142 and the storage battery modules MDL 1 to MDL 4 exist, so a space for wiring between the panel portion 142 b and the opening 145 It is desirable that the battery unit 141 be fixed so that the battery unit 141 can be fixed with the long bolt 143 with the electric component unit 142 fixed to the panel left part 133 or the panel right part 134. It is desirable that the back surface of the electric component unit 142 be disposed forward of the holes at the two rear corners of the top plate portion 141a when the battery unit 141 is fixed to the bottom plate assembly portion 137.

  The structure of the bottom plate assembly 137 will be described in more detail with reference to FIGS. 15 to 17. The bottom plate assembly 137 is composed of two parts, a bottom plate lower portion 147 and a bottom plate upper portion 148. The bottom plate lower portion 147 includes a flat bottom plate lower body 147a, a flange portion 147b formed by bending the left and right side edges and a rear edge of the bottom plate lower body 147a upward, and a front edge portion of the bottom plate lower body 147a. A flange wall portion 147c formed by bending upward, and four panel mounting plates 139 attached to the left and right flange portions 147b to fix the panel left portion 133 and the panel right portion 134, and the bottom plate when installing the indoor unit 131 The lower main body 147a is configured to be in close contact with the floor F.

  The bottom plate upper portion 148 is formed in a flat plate shape and is in close contact with the lower surface of the lower plate portion 141c of the battery unit 141. When the battery unit 141 is disposed on the bottom plate assembly portion 137, the bottom plate upper body 148a and the battery unit A battery case support 148b for supporting the battery 141, four flange portions 148c and 148c for positioning the battery unit 141, a beam portion 148d (see FIG. 20) for preventing deformation of the bottom plate upper main body 148a, and the bottom plate upper main body 148a The flange portions 148e (see FIG. 21) formed by bending the front and rear left and right edges downward are respectively provided. In the bottom plate upper main body 148a of this embodiment, the four sides are bent downward, and the lower edge of the flange portion 148e which is the bent portion is in contact with the bottom plate lower main body 147a. The height of the support portion 151 is substantially the same as the height of the support portion 151. The bent portion, the support portion 151, and the beam portion 148d support the weight of all the battery units 141 and 141 placed on the bottom plate assembly portion 137. The upper surface of the bottom plate upper main body 148a preferably has less friction in consideration of the installability of the battery units 141, 141, and the bottom plate upper main body 148a may be formed of a material that can easily slide.

  The battery case receiver 148b of the present embodiment is formed by opening at the location of the battery unit 141 in the bottom plate upper body 148a, and the dimension in the front-rear direction is about the same as the dimension in the front-rear direction of the battery unit body 141b, The dimension in the width (left and right) direction is approximately half of the dimension in the width direction of the battery unit body 141 b. The battery case receiver 148b is formed by bending the four sides of the opening downward, and the lower edge thereof has a support portion 151 in contact with the bottom plate lower main body 147a. Are formed in an L shape, and are configured to be in contact with the bottom plate lower main body 147a at the lower surface. Further, the support portion 151 has a hole (not shown) in a portion in surface contact with the bottom plate lower main body 147a, and the corresponding hole of the bottom plate lower main body 147a by the nail (or screw) 152 as a fastening member. The bottom plate lower portion 147 and the bottom plate upper portion 148 are installed on the floor F by fastening them together with a floor F (not shown).

  With this configuration, when moving the heavy battery unit 141 (about 40 kgf) to the bottom plate upper main body 148 a, which is the mounting surface of the bottom plate assembly 137, and moving it to the predetermined position of the battery system 41. The contact area between the upper surface of the bottom plate upper main body 148a and the lower surface of the lower plate portion 141c can be reduced to reduce the friction, and the battery unit 141 can be easily slid. Further, as shown in FIG. 17, when the battery unit 141 is disposed, the heavy-weight parts in the battery unit 141, for example, support portions on the left side and the right side of the opening substantially below the center of the storage battery modules MDL1 and MDL2 Since each of 151 and 151 is positioned, the battery unit 141 can be supported more reliably, and deformation of the bottom plate upper portion 148 on which the battery unit 141 can be mounted can be prevented.

  Next, a method of attaching the battery unit 141 to the indoor unit 131 will be described based on FIGS. 18 and 19. As described above, when the installation location of the indoor unit 131 has restrictions or conditions such that the work space of the worker is only the space in front of and above the indoor unit 131, the worker lifts the battery unit 141 having a weight There is a possibility that it may be difficult to install in the bottom plate assembly portion 137. Therefore, in the indoor unit 131 of this embodiment, first, a part of the battery unit 141 is placed on the front of the bottom plate upper main body 148a, and then the battery unit 141 is slid to a predetermined position and disposed at the predetermined position. At this time, in addition to the flange portion 147b of the bottom plate lower portion 147 functioning as a positioning portion for aligning the bottom plate upper portion 148 with the bottom plate lower portion 147, a guide which determines the position in the width direction of the battery unit 141 and guides it to a predetermined position. It also has a function as a part. As shown in FIG. 18, after a part of the battery unit 141 is placed on the front of the bottom plate upper main body 148a, the side portion of the lower plate portion 141c is brought into contact with the flange portion 147b and slides from the front along the flange portion 147b. By doing this, the battery unit 141 can be moved smoothly to a predetermined position.

  After moving the battery unit 141 to a predetermined position, in order to fix the front side of the battery unit 141 to the bottom plate assembly portion 137, while visually confirming the holes at the two front corners of the lower plate portion 141c of the battery unit 141, The bolt 144 can be tightened. However, since the fixation on the rear side of the battery unit 141 with respect to the bottom plate assembly portion 137 can not be visually confirmed, the holes at the two rear corners of the lower plate portion 141c, if the battery unit 141 is not surely disposed at the predetermined position; The corresponding hole in the bottom plate upper main body 148 a does not communicate and can not be fixed by the bolt 143. Therefore, in the present embodiment, two flange portions 148c, 148c for positioning the battery unit 141 are provided upward between the holes formed at the rear of the bottom plate upper main body 148a, and the lower plate portion 141c of the battery unit 141 is provided. The convex portions 155 corresponding to the flange portions 148 c and 148 c are provided so that the battery unit 141 can be positioned in the front-rear direction.

  As shown in FIG. 19, when the battery unit 141 is slid backward from the front to the predetermined position of the bottom plate assembly 137, the battery unit 141 moves along the flange portion 147b, so that the battery unit 141 is moving. The position in the width direction is naturally fixed, and the convex portion 155 formed on the lower plate portion 141c is smoothly inserted between the flange portions 148c and 148c of the bottom plate upper main body 148a. When the battery unit 141 is further pushed backward from here, the rear surface of the lower plate portion 141c abuts against the flange portions 148c and 148c, and the battery unit 141 is positioned not only in the width direction but also in the front-rear direction. At this time, the flange portions 148 c and 148 c function as stoppers in the front-rear direction of the battery unit 141 in addition to functioning as positioning portions in the width direction of the battery unit 141. With such a configuration, the battery unit 141 is positioned in the front-rear direction and the width direction by the combination of the convex portion 155 of the lower plate portion 141c and the flange portions 148c and 148c of the bottom plate upper main body 148a. At the position where the battery unit 141 is inserted, the bolts 143 and 144 are inserted from above and screwed into the holes at the front two corners of the lower plate portion 141c and the holes at the rear two corners of the top plate portion 141a. Can be securely fixed to the bottom plate assembly 137.

  The structure of the bottom plate assembly 137 will be described in more detail with reference to FIGS. 20 and 21. As described above, since the panel front 132 of the outdoor unit 131 is fixed by attaching the screws 138 only to the panel left part 133 and the panel right part 134, the panel front 132 is bent when pressing the center lower part of the panel front 132. The lower side portion of the panel front portion 132 is bent inward in an L shape to be reinforced so as not to be rubbed. Therefore, although it is necessary to insert the flange part 132a used as this bending part under the bottom plate assembly part 137, the bottom plate lower main body 147a is closely_contact | adhered to the floor F. As shown in FIG.

  Therefore, as shown in FIG. 20, in the present embodiment, a stepped portion 156 having an L-shaped cross section is formed at the front of the bottom plate lower main body 147a, and the flange portion 132a can be inserted under the stepped portion 156. There is. The height of the step portion 156 is higher than that of the folded back end of the flange portion 132a in the upper direction, and the depth in the front-rear direction is larger than the width of the flange portion 132a in the depth direction. The flange portion 132a can be inserted into the step portion 156 with a margin. Here, the inner surface of the panel front portion 132 abuts on the flange wall portion 147 c formed on the front portion of the bottom plate lower portion 147 so that the bottom plate assembly portion 137 supports and reinforces the panel front portion 132. Further, the flange portion 148e positioned on the front side of the bottom plate upper main body 148a is bent downward and the lower edge thereof is in contact with the bottom plate lower main body 147a, but the step portion 156 is formed there. Therefore, the bending height of the flange portion 148e may be set lower by the height of the step portion 156 as compared with the bending height of the flange portions 148e formed on the other three sides of the bottom plate upper main body 148a.

  The structure of the panel mounting plate 139 will be described in more detail with reference to FIG. The panel mounting plate 139 is formed in a concave shape in a front view, and a flat panel mounting plate main body 139a installed across the width of the opening FO of the floor F and one side of the panel mounting plate main body 139a upward And a support portion 139c for bending the other side surface of the panel mounting plate body 139a upward and supporting the panel left portion 133 and the panel right portion 134. It consists of

  The mounting portion 139b of the panel mounting plate 139 has a hole 161 for screw insertion at its center, while the convex portions 162 and 162 are bent on both sides and formed on the left side and the right side of the bottom plate lower portion 147 In the flange portion 147 b, a female screw portion 163 capable of screwing in a screw (not shown) serving as a fastening member corresponding to the hole portion 161 and a convex portion 162 corresponding to the convex portions 162 and 162. , 162 can be inserted, respectively. Thereby, the convex parts 162, 162 of the panel mounting plate 139 are inserted into the openings 164, 164 of the bottom plate lower part 147, and the female screw part 163 and a screw (not shown) are tightened through the hole 161. Thus, the mounting portion 139b of the panel mounting plate 139 can be in surface contact with the flange portion 147b of the bottom plate lower portion 147 so that the panel mounting plate main body 139a is always horizontal, and can be fixed in a stable state.

  As described above, when there are restrictions or conditions in the mounting location of the indoor unit 131, the panel left portion 133 and the panel right portion 134 are slid from the front and inserted, and the screws 138 inserted from above the panel upper portion 135 The panel mounting plate main body 139a is inclined when the panel mounting plate 139 is inclined relative to the horizontal, although it is fixed and supported by the fixing portion 142a of the electric component unit 142 and the support portion 139c of the panel mounting plate 139. For this reason, the support portion 139c is also inclined, and when the panel left portion 133 or the panel right portion 134 is slid from the front, the support portion 139c is interfered with the support portion 139c and can not be inserted. However, with this configuration, the panel mounting plate main body 139a is always horizontal, so even if the panel left portion 133 or the panel right portion 134 is slid from the front, it is easy without interference with the support portion 139c. Can be inserted into In this case, the convex portions 162 and 162 at this time are added to the function of the supporting portion for vertically supporting the panel mounting plate 139 so that the panel mounting plate main body 139a becomes horizontal. It also has the function of positioning which determines the position fixed to the flange part 147b.

  FIG. 23 shows a modification of this embodiment. The panel mounting plate 139 here is integrally formed front and back without being divided into a pair of front and rear as described above, and is configured to include a bar-like flange portion 165 between the panel mounting plates 139. The flange portion 165 is provided between the rear supporting portion 139c of the panel mounting plate main body 139a of the front panel mounting plate 139 and the front supporting portion 139c of the panel mounting plate main body 139a of the rear panel mounting plate 139. The width of the flange portion 165 is preferably such that it does not interfere with the opening FO of the floor F when the panel mounting plate 139 is installed. The other configuration is the same as that described above.

  Also in this modification, the bottom plate assembly portion 137 is fixed to the floor F when the indoor unit 131 is attached. At this time, both sides of the bottom plate assembly portion 137 are held for movement and attachment. At this time, if the flange portion 165 has a plate shape, the flange portion 165 is naturally held by hand, and the flange portion 165 is deformed by the weight of the bottom plate assembly portion 137. In addition, if the flange portion 165 is formed into a plate shape and the width thereof is formed wide, it may interfere with the opening portion FO of the floor F, and the lead wire from the opening portion FO may not be able to pass through.

  However, the flange of the bottom plate lower portion 147 is formed by making the flange portion 165 rod-like as in this modification, or otherwise removing the flange portion 165 and dividing the panel mounting plate 139 into a pair of front and rear as described above. Since a hand can be put between the part 147b and the flange part 165 or a hand can be put between the front and rear panel mounting plates 139 to hold both sides of the bottom plate assembly part 137, deformation of the flange part 165 is prevented It is possible to prevent interference between the flange portion 165 and the opening FO of the floor F. Further, if the panel mounting plate 139 is integrally connected to the front and rear by the flange portion 165, the work of mounting and fixing the panel mounting plate 139 to the flange portion 147b of the bottom plate assembly portion 137 can be facilitated.

  As described above, in the storage battery system 1 of the present embodiment, the battery system 41 including the secondary battery 38 and the storage battery control unit 39 that controls these is used as the indoor unit 131 as indoor equipment, and the battery system 41 is fixed to a house. The bottom plate assembly 137 is provided at the lower part of the battery system 41, and the bottom plate assembly 137 is composed of two parts, a bottom plate lower portion 147 and a bottom plate upper portion 148.

  In this case, by configuring the battery system 41 with the indoor unit 131 serving as indoor equipment instead of using the outdoor equipment, an installation space for the battery system 41 outside becomes unnecessary, and the battery system 41 is protected from rain water and dust. The structure of the outdoor equipment excluding the battery system 41 can be simplified. Further, since the battery system 41 is installed indoors, it is possible to prevent the operation noise of the cooling fan and the like from leaking outside. Furthermore, by forming the bottom plate assembly portion 137 into two configurations of the bottom plate lower portion 147 and the bottom plate upper portion 148, the battery system 41 can be stably installed thereon.

  In the storage battery system 1 of the present embodiment, the bottom plate lower portion 147 is in close contact with the floor F on which the indoor unit 131 is installed, and the bottom plate upper portion 148 is in close contact with the battery units 141 and 141 including the storage battery modules MDL1 to MDL4. The plate 147 and the bottom plate upper portion 148 are fixed to the floor F by fastening together with a nail 152 serving as a fastening member.

This configuration also eliminates the need for the outdoor installation space of the battery system 41, and the above-described effects can be obtained. Further, since the bottom plate assembly portion 137 is attached and fixed to the floor F at the same time as the bottom plate upper portion 148 is attached and fixed to the bottom plate lower portion 147 by using the nail 152,
The installation work of the bottom plate assembly portion 137 with respect to the floor F can be easily performed.

  In the storage battery system 1 of the present embodiment, the fixed positions of the bottom plate lower portion 147 and the bottom plate upper portion 148 to the floor F, that is, the support portions 151 formed on the bottom plate upper portion 148 are provided below the battery units 141 and 141 .

  This configuration also eliminates the need for the outdoor installation space of the battery system 41, and the above-described effects can be obtained. Furthermore, since the support portion 151 is positioned directly below the battery unit 141, the battery unit 141 can be supported more reliably, and deformation of the bottom plate upper portion 148 on which the battery unit 141 is mounted can be prevented.

  Further, in the storage battery system 1 of the present embodiment, the left and right side edge portions of the bottom plate lower main body 147a are formed by being bent upward on both sides of the bottom plate lower portion 147, and guided by sliding the battery unit 141 from the front. It comprises and comprises flange part 147b.

  Therefore, even when there is a restriction or a condition in the mounting place of the indoor unit 131, the battery unit 141 can be moved smoothly to the predetermined position.

  Further, in the storage battery system 1 of the present embodiment, flange portions 148 c and 148 c for stoppers are provided as a final positioning portion of the battery unit 141 behind the bottom plate upper portion 148 of the bottom plate assembly portion 137.

  Thereby, the battery unit 141 is slid, and the battery unit 141 is slid until the battery unit 141 abuts on the flanges 148 c and 148 c of the bottom plate assembly 137, where the final of the battery unit 141 with respect to the bottom plate assembly 137 is performed. In this case, the battery unit 141 can be reliably aligned with the predetermined position of the bottom plate assembly 137 even when there is a restriction or a condition in the mounting position of the indoor unit 131.

  In the storage battery system 1 of the present embodiment, the front portion of the bottom plate lower main body 147a which is the front side of the bottom plate assembly portion 137 is provided with a step portion 156 for inserting a flange portion 132a bent and formed as a lower side portion of the panel front portion 132. Is configured.

  Therefore, the lower side portion of the panel front portion 132 can be reinforced by a flange portion 132a which is formed in an L-shape by bending inward so that the panel front portion 132 is not bent and bent when pushing the center of the panel front portion 132. Further, by inserting the flange portion 132a into the step portion 156, the panel front portion 132 serving as the exterior body of the indoor unit 131 can be attached to the bottom plate assembly portion 137 so that the flange portion 132a does not get in the way.

  Further, in the storage battery system 1 of the present embodiment, the panel mounting plate 139 for supporting the panel left portion 133 and the panel right portion 134 is attached to the flange portions 147b and 147b forming both side surfaces of the bottom plate assembly portion 137 Positioning openings 164 and 164 into which the projections 162 and 162 of the panel mounting plate 139 can be inserted are formed in the flanges 147 b and 147 b.

  Therefore, by inserting and fixing the convex portions 162 and 162 of the panel mounting plate 139 into the openings 164 and 164 of the bottom plate lower portion 147, the panel mounting plate 139 is always positioned so as to be horizontal. Even when the left panel portion 133 and the right panel portion 134 are slid, the panel can be easily inserted without being interfered by the support portion 139c.

  In addition, in the storage battery system 1 of the present embodiment, the panel mounting plate 139 is divided into two on the front side and the rear side, and the panel mounting plate 139 is configured to include four in total on the left and right.

  Therefore, when the bottom plate assembly portion 137 is fixed to the floor F, both sides of the bottom plate assembly portion 137 can be held, and deformation of the panel mounting plate 139 can be prevented. In addition, interference between the panel mounting plate 139 and the opening portion FO of the floor F can be prevented on both sides of the bottom plate assembly portion 137.

  The configuration of a third embodiment of the storage battery system according to the present invention will be described with reference to FIGS. 24 to 27. Here, the storage battery system 1 includes a secondary battery support lower portion 171 having a plurality of rising portions 172, a secondary battery mounting portion 181 including a secondary battery mounting plate upper front portion 181a and a secondary battery mounting plate upper rear portion 181b. The structure which fixes the storage battery modules MDL1-MDL6 which comprise the secondary battery 38 by the upper and lower sides is employ | adopted. The rising portions 172 are arranged in the front row and the rear row of the storage battery board 7 accommodating the secondary battery 38, and in the front rows and the rear rows, the rising portions 172 are positioned in the same straight line in the front-rear direction. A rising portion 172 having the same shape as the rising portion 172 of the secondary battery support lower portion 171 is provided also on the upper front portion 181a and the upper and lower rear portion 181b of the secondary battery mounting plate. In each of the storage battery modules MDL1 to MDL6, a convex portion 173 is provided on the rising portion 172 of the secondary battery support lower portion 171, the secondary battery mounting plate upper front portion 181a, and the secondary battery mounting plate upper rear portion 181b. The battery board 7 is incorporated in a state where the longitudinal direction is erected.

  Conventionally, the storage battery modules MDL1 to MDL6 in the storage battery panel 7 are incorporated with the longitudinal direction lying down. However, it is necessary to reduce the cost and reduce the size of storage battery board 7, so that storage battery modules MDL1 to MDL6 in storage battery panel 7 are built in storage battery panel 7 with their longitudinal direction standing, but storage battery modules MDL1 to MDL6 There was a problem in the installation and stability after installation.

  Therefore, in the present embodiment, the secondary battery support lower portion 171, the secondary battery mounting plate upper front portion 181a, and the secondary battery mounting plate upper rear portion 181b are provided as sheet metal parts for fixing the storage battery modules MDL1 to MDL6 vertically. By providing the rising portion 172 in which the convex portion 173 is provided on the sheet metal part, the mounting workability of the storage battery modules MDL1 to MDL6 and the stability of the storage battery modules MDL1 to MDL6 after mounting are improved.

  The internal structure of the storage battery panel 7 in the present embodiment will be described based on FIGS. 24 and 25 a to 25 d. Here, FIG. 24 is a perspective view of the inside of the storage battery panel 7 when all the storage battery modules MDL1 to MDL6 are accommodated in the battery accommodating portion 114 with the front panel 103 removed. FIG. 25a is a perspective view of a single secondary battery support lower portion 171, FIG. 25b is a perspective view of the secondary battery support lower portion 171 in a state where the storage battery modules MDL1 to MDL6 are arranged, and FIG. FIG. 25 d is a plan view of the secondary battery support lower portion 171 in a state where the storage battery modules MDL1 to MDL6 are arranged. Note that the term "airframe" in the specification and the drawings indicates the airframe of the storage battery panel 7.

  Similar to the first embodiment, the storage battery panel 7 is provided with the electric component storage portion 113 at the upper side and the battery storage portion 114 for storing the storage battery modules MDL1 to MDL6 of the secondary battery 38 at the lower side. The storage battery modules MDL1 to MDL6 are assembled in the storage battery panel 7 so as to be arranged in three rows in the lateral direction and two rows in the front and rear direction with the longitudinal direction standing. Specifically, the bottom plate 170 corresponding to the lower panel 102 of the storage battery panel 7 includes a secondary battery support lower portion 171 as a sheet metal part on which the storage battery modules MDL1 to MDL6 are disposed as main components. The lower support portion 171 has 12 pairs of rising portions 172, 172... In six pairs.

  The width of the pair of left and right rising portions 172, 172 is formed to be substantially the same as the width dimension of each of the storage battery modules MDL1 to MDL6, and six pairs of three in the front row of the upper surface of the secondary battery support lower 171 Sections 172, 172,... Are installed, and three pairs of six rising sections 172, 172,... Are installed in the rear row of the upper surface of the secondary battery support lower portion 171. These 6 to 12 rising parts 172, 172... Are located on the same straight line in the front and rear rows, and when the storage battery modules MDL1 to MDL6 are arranged in the secondary battery support lower part 171, the respective storage batteries The pair of rising portions 172 and 172 are installed so as to support the lower side surfaces of the modules MDL1 to MDL6.

  In addition, two front and rear convex portions 173 (see FIG. 26C) protruding toward the storage battery modules MDL1 to MDL6 are provided for each of the rising portions 172. With such a configuration, the rising parts 172, 172 function as a guide part when installing the storage battery modules MDL1 to MDL6 in the secondary battery support lower part 171, and the storage battery modules MDL4 to MDL6 arranged in the rear row are By sliding from the front side of the storage battery board 7 on the upper surface of the secondary battery support lower portion 171, the battery can be smoothly moved and attached to a predetermined position. Further, the contact area between the storage battery modules MDL1 to MDL6 and the rising portions 172, 172 can be reduced by the convex portion 173, and friction between the two can be reduced, thereby sliding the storage battery modules MDL1 to MDL6 with a smaller force. As a result, the battery attachment workability of the storage battery modules MDL1 to MDL6 can be improved.

  The secondary battery support lower portion 171 has three flange portions 174 facing the rear side portion on the rear side of the airframe and, after arranging the storage battery modules MDL4 to MDL6, supports the lower front of these storage battery modules MDL4 to MDL6 After arranging the central support portion 175 and the storage battery modules MDL1 to MDL3, the storage battery modules MDL1 to MDL3 are configured to have a front support portion 176 that supports the lower front surfaces of the storage battery modules MDL1 to MDL3. Three flanges 174 are provided to support the lower rear face of each storage battery module MDL4 to MDL6 when storage battery modules MDL4 to MDL6 arranged in the rear row are arranged on secondary battery support lower part 171 Ru.

  With such a configuration, the flange portion 174 functions as positioning and a stopper for the storage battery modules MDL4 to MDL6, and the rising portions 172 and 172 until the storage battery modules MDL4 to MDL6 abut against the flange portion 174 from the front side of the body of the storage battery panel 7 By sliding along, the storage battery modules MDL4 to MDL6 can be positioned in the front-rear direction. In addition, after the storage battery modules MDL4 to MDL6 are disposed at positions abutted against the flange portion 174, the three central support portions 175 are fixed to the secondary battery support lower portion 171, whereby the respective storage battery modules MDL4 to MDL6 It is supported by In the present embodiment, three central support portions 175 are provided in accordance with the number of storage battery modules MDL4 to MDL6 installed, but it may be a continuous central support portion 175 in which all of them are connected in the lateral direction.

  After the central support portion 175 is fixed to the secondary battery support lower portion 171, the storage battery modules MDL1 to MDL3 arranged in the front row are slid from the front of the storage battery board 7 on the upper surface of the secondary battery support lower portion 171 Move to the position of and attach. At this time, the rising portions 172, 172 function as guide portions, and the central support portion 175 functions as a support portion of the storage battery modules MDL4 to MDL6, and also functions as a positioning portion and a support portion of the storage battery modules MDL1 to MDL3. Do. Then, after the storage battery modules MDL1 to MDL3 abut on the support portion 175, the storage battery modules MDL1 to MDL3 are arranged at predetermined positions, and then the front support portion 176 supporting the lower front surface of the storage battery modules MDL1 to MDL3 is fixed to the secondary battery support lower portion 171 By doing this, the respective storage battery modules MDL1 to MDL3 are supported in the lower four sides.

  The secondary battery mounting plate 181 which is a sheet metal part of the present embodiment will be described based on FIGS. 26a to 26c. Here, FIG. 26a is a perspective view of a single secondary battery attachment portion 181, and FIG. 26b is a perspective view of the secondary battery support lower portion 171 and the secondary battery attachment portion 181 in the state where the storage battery modules MDL1 to MDL6 are arranged. FIG. 26 c is an enlarged view of an essential part of the rising portion 172.

  The secondary battery mounting plate 181 includes a secondary battery mounting plate upper front portion 181 a and a secondary battery mounting plate upper rear portion 181 b. The secondary battery attachment plate upper front portion 181 a is attached to the front panel 103, and the secondary battery attachment plate upper rear portion 181 b is attached to the rear panel 104. In addition, the secondary battery attachment plate upper front portion 181a and the secondary battery attachment plate upper rear portion 181b have three pairs of six rising portions 172, 172, respectively, similarly to the secondary battery support lower portion 171. There is. The secondary battery support lower portion 171, the secondary battery mounting plate upper front portion 181a, and the secondary battery mounting plate upper rear portion 181b have the rising portions 172 all in the same shape. A convex portion 173 is provided. By configuring in this manner, the same metal mold can be used in these three types of sheet metals, which can lead to cost reduction.

  The secondary battery mounting plate upper rear portion 181b is attached in advance to the upper portion of the battery housing portion 114 before the storage battery modules MDL4 to MDL6 are disposed in the secondary battery support lower portion 171 inside the battery housing portion 114. The rising portion 172 provided at the upper rear 181b of the secondary battery mounting plate functions as a guide for the storage battery modules MDL4 to MDL6 disposed in the rear row, as with the secondary battery support lower portion 171, and also the storage battery module It also functions as a support for the upper side surfaces of MDL4 to MDL6. The secondary battery attachment plate upper rear portion 181 b here is for attaching a flat upper rear body 182 for attaching the rising portion 172 by projecting downward, and attaching the secondary battery attachment plate upper rear portion 181 b to the battery accommodating portion 114. The flange portion 183 is formed by bending the front and rear edge portions of the upper rear main body 182 upward.

  The secondary battery mounting plate upper front portion 181a is attached to the upper portions of the storage battery modules MDL1 to MDL3 from the front of the storage battery panel 7 after supporting all the lower portions of the storage battery modules MDL1 to MDL6 inside the battery housing 114 The rising portions 172 provided on the upper front portion 181a of the secondary battery mounting plate function as support portions on upper side surfaces of the storage battery modules MDL1 to MDL3. Similarly to the secondary battery attachment plate upper rear portion 181b, the secondary battery attachment plate upper front portion 181a also has a flat upper front main body 184 for projecting and attaching the rising portion 172 downward, and the secondary battery attachment plate upper portion In order to attach the front portion 181a to the battery housing portion 114, it is configured to have a flange portion 185 in which the front edge portion of the upper front body 184 is bent downward and the rear edge portion is bent upward.

  As described above, in the present embodiment, the plurality of storage battery modules MDL1 to MDL6 constituting the secondary battery 38 are vertically disposed by the secondary battery support lower portion 171 and the secondary battery attachment portion 181 which becomes the secondary battery support upper portion. Storage battery system 1 fixed vertically in the state of the secondary battery support lower portion 171, the secondary battery mounting plate upper front portion 181a which is the upper front portion of the secondary battery mounting portion 181, and the secondary which is the upper rear On the battery mounting plate upper rear portion 181b, rising portions 172 serving as a plurality of supporting pieces each having the same shape supporting the storage battery modules MDL1 to MDL6 individually are disposed, and the rising portions 172 install the storage battery modules MDL1 to MDL6. Convex parts 173 which are arranged in the front row and the rear row along the direction and which are in contact with the side surfaces of the storage battery modules MDL1 to MDL6 are provided in each rising part 172

  In this case, the storage battery modules MDL1 to MDL6 can be incorporated in the storage battery panel 7 with the longitudinal direction of the storage battery modules MDL1 to MDL6 set up, and the storage battery modules MDL4 to MDL6 disposed in the rear row as the guide portions. Can be slid from the front side of the storage battery board 7 on the upper surface of the secondary battery support lower portion 171 to be moved to a predetermined position and attached. Further, the friction between the storage battery modules MDL1 to MDL6 and the rising portion 172 can be reduced by the convex portion 173, and the storage battery modules MDL1 to MDL6 can be slid by a smaller force, and the storage battery modules MDL1 to MDL6 Thus, the battery attachment workability can be improved.

  27 and 28a to 28c show modifications of this embodiment. Here, FIG. 27 is a perspective view of the inside of the storage battery panel 7 when all the storage battery modules MDL1 to MDL6 are accommodated in the battery accommodating portion 114 with the front panel 103 removed. 28a is a perspective view of a single secondary battery support lower portion 171 ', FIG. 28b is a plan view of a single secondary battery support lower portion 171', and FIG. 28c is a secondary battery support lower portion 171 '. And a bottom plate 170 corresponding to the lower panel 102 as viewed from below.

  The secondary battery support lower portion 171 'in this modification is a 3 to 6 rising portion 172' in which the rising portions 172 of the front and rear rows are integrated, and the front portion of the pair of rising portions 172 ' Two battery modules, ie, battery modules MDL1 and MDL6, which form wide parts 175 in which the tip parts are spread and are arranged in two rows of front and rear by a pair of rising parts 172 ′, 172 ′ The storage battery modules MDL2 and MDL5 and the storage battery modules MDL3 and MDL4 are supported so as to stand in the longitudinal direction. Further, the wide portions 175 are formed by expanding the tip portions on the front side of the pair of rising portions 172 ′ in a V shape, and when sliding the storage battery modules MDL1 to MDL6 from the front of the storage battery panel 7 The storage battery modules MDL1 to MDL6 can be easily led between the pair of rising portions 172 '.

  In this modification, the number of convex portions 173 provided in one rising portion 172 ′ is four, and the positions of the convex portions 173 are substantially the same as those in the third embodiment. It is done. Also in this configuration, the rising parts 172 'and 172' function as guide parts, and the storage battery modules MDL4 to MDL6 arranged in the rear row are placed on the top surface of the storage battery board 7 on the upper surface of the secondary battery support lower 171 '. By sliding from the front of the machine, it can be moved to a predetermined position and attached. In addition, at the start of attachment of storage battery modules MDL1 to MDL6, storage battery modules MDL1 to MDL6 can be guided naturally between rising parts 172 ′ by using wide part 175, and storage battery modules MDL1 to MDL6 can be smoothly made inside storage battery board 7 It becomes possible to incorporate.

  In addition, the secondary battery support lower portion 171 'of this modification is formed in a flat plate shape and is in close contact with the lower surface portions of the storage battery modules MDL1 to MDL6, and the storage battery modules MDL1 to MDL6 in the secondary battery support lower portion 171'. , And three flanges supporting the loads of the storage battery modules MDL1 to MDL6, and a flange 193 formed by bending the four sides of the lower main body 191 downward.

  Secondary battery support portion 192 is an arrangement place of storage battery modules MDL1 and MDL6, storage battery modules MDL2 and MDL5, and storage battery modules MDL3 and MDL4 in lower main body 191 corresponding to three pairs of rising portions 172 '. The opening is formed at three places, and one side of the opening 176 is formed by bending downward. Here, when the secondary battery support lower portion 171 ′ is attached to the bottom plate 170, the lower end of the secondary battery support portion 192 abuts against the upper surface of the bottom plate 170 to support the load below the storage battery modules MDL1 to MDL6. Configured In order to improve the attachment workability of the secondary battery support lower portion 171 ', the secondary battery support portion 192 located on the left side is bent toward the left outside of the opening 176, and the secondary battery support located on the right side The portion 192 is bent toward the right outside of the opening 176.

  Further, the flange portion 193 formed on the side of the lower main body 191 is formed into an L-shaped cross section and bent toward the outer side of the machine body, and the bent portion of the flange portion 193 makes surface contact with the upper surface of the bottom plate 170 The side edge of the bottom plate 170 is substantially at the same position as the side edge of the inner upper surface of the bottom plate 170. And the weight of six storage battery modules MDL1-MDL6 is supported by the flange part 193 and the secondary battery support part 192 of these cross-sectional L-shape.

  With such a configuration, it is possible to prevent the lower main body 191 of the secondary battery support lower portion 171 'from being bent and improve the stability of the storage battery modules MDL1 to MDL6 after attachment. Further, since the lower main body 191 and the secondary battery support 192 are formed of the same sheet metal part and the lower main body 191 and the secondary battery support 192 are integrated, they are separate from the secondary battery support lower 171 ′. The cost can be reduced as compared with the configuration requiring the sheet metal parts supporting the weight of the storage battery modules MDL1 to MDL6. Furthermore, when attaching the secondary battery support lower portion 171 ′ to the bottom plate 170, the side edge portion of the bent portion of the flange portion 193 can be aligned with the side edge portion of the upper surface inside the bottom plate 170. Improves the quality.

  As described above, in the storage battery system 1 of the present modification, the wide end portion 175 is formed on the front side of the storage battery panel 7 as a structure in which the tip end portion of the rising portion 172 of the secondary battery support lower portion 171 'is expanded.

  In this case, at the start of attachment of storage battery modules MDL1 to MDL6 to be secondary battery 38, storage battery modules MDL1 to MDL6 can be smoothly incorporated between start-up portions 172 ′, and the storage battery to secondary battery support lower part 171 ′ The mounting workability of the modules MDL1 to MDL6 is improved.

  In addition, in storage battery system 1 of the present modification, a storage battery module mounted on secondary battery support lower portion 171 ′ under secondary battery support lower portion 171 ′, that is, between secondary battery support lower portion 171 ′ and bottom plate 170. The secondary battery support portion 192 and the flange portion 193 on the side of the secondary battery support lower portion 171 ′ are provided as portions supporting the loads of MDL1 to MDL6.

  In this case, the lower main body 191 of the secondary battery support lower portion 171 'can be prevented from being bent by the load of the storage battery modules MDL1 to MDL6, and the stability of the storage battery modules MDL1 to MDL6 after attachment can be improved.

  Further, in storage battery system 1 of the present modification, secondary battery support portion 192 supporting the loads of storage battery modules MDL1 to MDL6 is opened at three locations where storage battery modules MDL1 to MDL6 of secondary battery support lower portion 171 ′ are disposed. The opening portion is bent downward to abut against the bottom plate 170 which is a sheet metal part, and the lower main body 191 and the secondary battery support portion 192 of the secondary battery support lower portion 171 ′ are integrated.

  Therefore, the lower main body 191 can be prevented from bending, and the stability of the storage battery modules MDL1 to MDL6 after attachment can be improved. Further, the cost can be reduced as compared with the configuration requiring the sheet metal parts supporting the weight of the storage battery modules MDL1 to MDL6 separately from the secondary battery support lower part 171 '.

  Further, in storage battery system 1 of the present modification, secondary battery support portion 192 located on the left side of secondary battery support portion 192 supporting the loads of storage battery modules MDL1 to MDL6 is on the left outside of secondary battery support portion 192. The secondary battery support portion 192 located on the right side is formed to be bent toward the right outside of the secondary battery support portion 192.

  In this case, since the opening 176 is formed inside the bent left and right secondary battery support 192, the assembly worker can hold the secondary battery support lower portion 171 'through the hand without difficulty. As a result, the mounting operation of the secondary battery support lower portion 171 'to the bottom plate 170 can be facilitated.

  Furthermore, in the storage battery system 1 of the present modification, the flange portions 193 on the side of the secondary battery support lower portion 171 'are provided on the two side portions that are the left and right two places of the body of the portion supporting the weight of the storage battery modules MDL1 to MDL6 Each is configured to be bent in the left and right outer direction of the airframe.

  Therefore, if the side edge portion of the bent portion of flange portion 193 and the side edge portion of the upper surface inside bottom plate 170 are aligned, secondary battery support lower portion 171 ′ can be aligned with bottom plate 170. The mounting work of the battery support lower portion 171 'can be further facilitated.

  A paper-made cardboard pallet according to a fourth embodiment of the present invention will be described with reference to FIGS. The cardboard pallet here is used to transport the secondary battery 38 in each of the above embodiments.

  FIG. 29 is a view showing the assembled state of the cardboard pallet in the present embodiment. FIG. 30 is an enlarged view of the X portion in FIG. 29, and the X 'portion, the X' 'portion, and the X' '' portion in FIG. 29 have the same structure. In each of these figures, the completed assembled shape cardboard pallet 200 has a main body 201 which is a basis of the outer shape of the cardboard pallet 200, a bottom plate 202 which is a ground portion of the cardboard pallet 200, and a storage battery of the secondary battery 38 not shown. The modules MDL1 to MDL6 are individually mounted, and a beam 203 for adding the deflection resistance of the cardboard pallet 200 is a main component. An inexpensive general-purpose material is used as the material of the main body 201, and an expensive reinforced cardboard is used as the material of the bottom plate 202 and the beam 203 other than the main body 201. The reinforced cardboard uses a base paper of higher strength than general cardboard made of general-purpose materials, and is formed with a multilayer structure of at least two or more layers.

  The main body 201 has a bottom wall 211 to which a bottom plate 202 is fixed at its bottom surface. The bottom wall 211 is divided into one side and the other side in the longitudinal direction of the cardboard pallet 200 in plan view, and is disposed in a planar shape, and a hollow space 212 is formed between the bottom walls 211 and 211. The main body 201 is formed along the longitudinal direction of the main body 201 in addition to the bottom wall 211, and is a long vertical flap 214 bent upward from the end of the bottom wall 211, and an inner short facing the space 212 of the main body 201. An inner short vertical flap 215 formed along the hand direction and bent upward from the end of the bottom wall 211, and a horizontal flap folded horizontally inward from the central portion of the longitudinal vertical flap 214 A beam 203 is fixed to an upper portion of the longitudinal vertical flap 214 to increase the strength of the main body 201 in the longitudinal direction. Also, in the longitudinally central portion of the longitudinal vertical flap 214, an opening extending from one longitudinal vertical flap 214 toward the other longitudinal vertical flap 214 by bending the inner short vertical flap 215 and the horizontal flap 216, respectively. The portion 217 is formed. The opening 217 is formed to have a size enough to insert the fork of a forklift (not shown). The lower side of the opening 217 communicates with the space 212 described above. Reference numeral 218 denotes a reinforcing member fixed to the upper surface of the bottom wall 211 and forming a contact surface when the longitudinal vertical flap 214 and the inside short vertical flap 215 are bent.

  As shown in FIG. 30, protrusions 221 protruding toward the inner short vertical flap 215 are formed on both longitudinal end surfaces of the horizontal flap 216, and the upper end surface of the inner short vertical flap 215 is a protrusion A recess 222 is formed which is engaged by 221. Further, in the outer short side direction of the cardboard pallet 200, there is no so-called outer short vertical flap bent from the bottom wall 211, and instead an open outer end face portion 224 is formed. In this embodiment, the entire cardboard pallet 200 including the main body 201 is held in a three-dimensional assembled shape only by the engagement of the concavo-convex shape by the convex portion 221 and the concave portion 222.

  FIG. 31 shows a planar shape of the cardboard pallet 200 shown in FIG. 29 before assembly. 32 is an enlarged view of the Y portion in FIG. 31, and the Y 'portion, the Y' 'portion, and the Y' '' portion in FIG. 31 also have the same structure. The main body 201 shown in FIG. 29 is assembled in a three-dimensional shape from the sheet 231 having a flat shape shown in FIG.

  In FIGS. 31 and 32, 232 is a fold of the longitudinal vertical flap 214 with respect to the bottom wall 211, 233 is a fold of the inner short vertical flap 215 with respect to the bottom wall 211, and 234 is with respect to the longitudinal vertical flap 214. It is a bent portion of the horizontal flap 216. Also, a slit-like relief opening 236 is provided between the inner short vertical flap 215 and the horizontal flap 216 so that they do not rub against each other when the inner short vertical flap 215 or the horizontal flap 216 is folded. Is formed. The relief opening 236 is intentionally wider than the gap 237 between the longitudinal vertical flap 214 and the horizontal flap 216.

  In the above configuration, from the state where the bottom plate 202, the beam 203, and the reinforcing member 218 are attached and fixed in advance to the sheet 231 having a flat shape, the bottom wall centering on the bent portion 232 is firstly completed Vertically fold the longitudinal vertical flap 214 relative to 211 and then fold the inner short vertical flap 215 vertically relative to the bottom wall 211 about the fold 233 and finally the fold Horizontal flaps 216 are bent inwards horizontally with respect to the longitudinal vertical flaps 214 about 234.

  Here, when the longitudinal vertical flaps 214 are first folded, the longitudinal flaps 214 as well as the horizontal flaps 216 are folded about the fold 232 but between the inner short vertical flaps 215 and the horizontal flaps 216 Since the wide relief opening 236 is formed on the extension of the bent portion 232, the horizontal flap 216 does not rub against the end of the inner short vertical flap 215. Next, the inner short vertical flaps 215 do not rub against the inner surface of the horizontal flaps 216 when the inner short vertical flaps 215 are bent about another bending portion 233.

  Finally, when the horizontal flap 216 is bent to a substantially horizontal direction centering on the bent portion 234, the convex portion 221 formed on the horizontal flap 216 at the location where the horizontal flap 216 and the inside short vertical flap 215 cross at right angles It fits into a recess 222 formed in the inner short vertical flap 215. Then, the horizontal flap 216 is held horizontally, the longitudinal vertical flap 214 supporting the horizontal flap 216 is also held vertically, and the inner short vertical flap 215 fitted to the horizontal flap 216 is vertically The held and completed cardboard pallet 200 is held in a three-dimensional assembled shape.

  In the completed cardboard pallet 200, for example, the storage battery modules MDL1 are individually mounted on the upper surfaces of the beams 203 forming the uppermost surface of the cardboard pallet 200, but the beams 203 are not deformed by the reinforced cardboard. Further, since the beam 203 attached and fixed to the upper portion of the longitudinal vertical flap 214 is also supported by the inner short vertical flap 215 and the horizontal flap 216, the load from the storage battery module MDL1 to the main body 201 is dispersed, and the general purpose material is used. The entire cardboard pallet 200 including the main body 201 is not crushed or deformed.

  The cardboard pallet 200 has a longitudinal vertical flap 214 and an inside short vertical flap 215, and a horizontal flap 216 that is bent inward from the longitudinal vertical flap 214 that forms the longitudinal outer surface of the main body 201, for inserting the fork of a forklift. Is formed. In particular, in the present embodiment, since the horizontal flaps 216 are curved in the inner surface direction, the fork lift's claw is inserted into the opening 217 to contact the fork lift's claw when lifting the cardboard pallet 200 carrying the storage battery module MDL1. The horizontal flap 216 serves as a cushioning material and can prevent direct contact with the product storage battery module MDL1. Further, even if the claw inserted in the opening 217 contacts the inward short vertical flap 215 by the inward short vertical flap 215, it is possible to prevent direct contact with the storage battery module MDL1 from there. In addition, the longitudinal vertical flaps 214 can prevent direct contact with the storage battery module MDL1 if the fork of the forklift deviates from the opening 217.

  By the way, reinforced cardboard has conventionally been used as a material of a cardboard pallet for storage battery transportation. In addition, when assembling the cardboard pallet, in order to form the cardboard pallet into a three-dimensional shape, it is necessary to use a holding part such as a tape, an adhesive, or a stapler stapler, etc. The unit did not have a flap that prevented the claws from contacting the product battery.

  Reinforcing cardboard is a more expensive and expensive material than general-purpose cardboard, and combined with the separate use of a holding part to form a three-dimensional shape, has been a factor in cost increase. In addition, the fact that the flaps for protecting the wall of the opening are not provided is concerned about the damage to the storage battery, which has been a problem when using a cardboard pallet. In order to solve these problems, this embodiment proposes an example of a cardboard pallet 200 having a reduction in material cost, reduction of holding parts at the time of assembly and simplification of assembly, and a structure in which the lifter and the storage battery do not contact. ing.

  That is, in the present embodiment, the main body 201 which is the basis of the outer shape of the cardboard pallet 200 is formed of an inexpensive general-purpose material such as general cardboard, while waterproofness is required as an additional function. In the bottom plate 202 which makes the above, and the beam 203 for adding the deflection resistance of the cardboard pallet 200, reinforced cardboard having higher strength than general-purpose materials is partially used.

  In this case, a reinforced cardboard is used only for the bottom plate 202 and the beam 203 as a place where durability and strength are required, and a general-purpose material is used for the main body 201 that is the other place to transport the storage battery module MDL1. It is possible to reduce the cost of materials while maintaining the required water resistance and strength as a cardboard pallet.

  Further, in this embodiment, when assembling the three-dimensional main body 201 from the sheet 231 having a planar shape, it has an inner short vertical flap 215 as a vertical flap which is vertically folded and a horizontal flap 216 which is horizontally folded. And an uneven shape formed by the convex portion 221 and the concave portion 222 at a position where the inner short vertical flap 215 and the horizontal flap 216 are orthogonal, and the assembled shape of the main body 201 is three-dimensionally maintained only by fitting of the uneven shape. It is configured as follows.

  In this case, when assembling the three-dimensional main body 201 from the flat sheet 231, the uneven shape provided on the inner short vertical flap 215 and the horizontal flap 216 makes it possible to use the main body 201 without using another shape holding member. The assembled shape can be held three-dimensionally. Therefore, tape attachment and the like are unnecessary, and simple assembly with reduced number of parts to be held becomes possible, contributing to reduction of man-hours and cost reduction.

  Further, in the present embodiment, the cardboard pallet 200 in the assembled shape is formed with the open outer end face portion 224 without providing the vertical flap in the outer short side direction thereof, and the opening portion 217 where the fork can be inserted and removed. A longitudinal vertical flap 214 formed by bending the main body 201, an inner short vertical flap 215, and a horizontal flap 216.

  These flaps 214, 215, 216 prevent the fork claws from coming into direct contact with the storage battery module MDL1 which is a product, thereby making it possible to protect the storage battery module MDL1. Further, the claws of the forklift can be inserted into the opening 217 without any trouble, and the transportability of the storage battery module MDL1 using the cardboard pallet 200 can be improved.

  Further, in the present embodiment, a slit-like relief opening 236 is provided between the inner short vertical flap 215 and the horizontal flap 216 in the flat sheet 231 before the main body 201 is assembled.

  In this case, when assembling the three-dimensional main body 201 from the sheet 231 having a planar shape, rubbing when bending the inner short vertical flap 215 or the horizontal flap 216 is eliminated, and the assembly operation becomes easy. The escape opening 236 is preferably formed to a width that does not cause rubbing due to such bending.

  The charged part waterproof structure of the storage battery system 1 according to the fifth embodiment of the present invention will be described with reference to FIGS. 33 and 34. Also, for comparison, the waterproof structure of the conventional battery storage system is shown in FIG. 35 and FIG. 36.

  In FIG. 33, a terminal block cover 251 covering a terminal block (not shown) is provided with an opening 252 which is a wiring penetration portion on the lower side. Also, the inner surface 253 of the terminal block cover 251 can be opened from the terminal block location so that the terminal block does not contact the terminal block cover 251 and the wiring connected to the terminal block can pass through the opening 252 without hindrance. From the right panel 105 of the storage battery board 7 which is not shown here, it bulges out over 252. The inner surface 253 of the terminal block cover 251 is a surface which can not be seen from the outside when the terminal block cover 253 is attached to the right panel 105 of the storage battery board 7, and the opposite surface is an appearance surface 254 seen from the outside (see FIG. See 34).

  Reference numeral 255 denotes a waterproof board disposed on the terminal block cover 251 as a measure to prevent rainwater from entering the terminal block serving as the charging unit. On the inside of the waterproof plate 255, a through hole 256 for wiring communicating with the opening 252 of the terminal block cover 251 is provided, while on the outside of the waterproof plate 255, a welded portion to the terminal block cover 251 is formed. A bending portion 257 is provided. In addition, in the opening 252 of the terminal block cover 251, a packing 261 as an elastic member in close contact with the right panel 105 of the storage battery panel 7 is disposed.

  FIG. 34 is an enlarged view around the opening 252 of the terminal block cover 251. As shown in FIG. In the figure, the waterproof plate 255 serving as a partition for rain water is fixed by welding the overlapping portion 262 of the outer surface of the bending portion 257 and the inner surface 253 of the terminal block cover 251. In this embodiment, the terminal block cover The tip of the bent portion 257 is bent upward, not downward, so that the overlapping portion 262 which becomes the sheet metal joint portion of 251 and the waterproof plate 255 is not formed on the lower end surface of the terminal block cover 251 and the waterproof plate 55 A packing 261 is interposed between the lower end surface of the terminal block cover 251 and the lower end surface of the waterproof plate 255.

  35 and 36 showing the conventional waterproof structure of the charging portion, the configuration of the terminal block cover 251 is common to the conventional and the present embodiment, but the tip of the bent portion 257 of the conventional waterproof plate 255 is the same. The packing 261 is accommodated in the waterproof plate 255 so as to be bent downward and surrounded by the bent portion 257, and the overlapping portion 262 of the terminal block cover 251 and the waterproof plate 255 is the terminal block cover 251 and the waterproof plate It is formed facing the lower end face of 255. Therefore, conventionally, the capillary phenomenon from the lower end face to the overlapping portion 262 causes rainwater intrusion and water retention in the overlapping portion 262 of the sheet metal, which causes the generation of rust from the terminal block cover 251 or the waterproof plate 255 The

  On the other hand, in the present embodiment, the bent portion 257 of the waterproof plate 255 which is another sheet metal part is placed on the side opposite to the lower end face of the terminal block cover 251 with respect to the terminal block cover 251 which is a sheet metal part. A configuration is adopted in which the bent portion 257 and the terminal block cover 251 are fixed by welding. Therefore, the overlapping portion 262 serving as a sheet metal mating portion is not formed on the lower end surfaces of the terminal block cover 251 and the waterproofing plate 55 without impairing the function of the waterproofing plate 255 itself for preventing rainwater intrusion. It is possible to prevent rainwater intrusion and water retention at 262.

  The present invention is not limited to the above-described embodiment, and various modifications can be made without departing from the scope of the present invention. For example, you may comprise the storage battery system which combined each part of the 1st Example-5th Example. The configuration and shape of each part of the first to fifth embodiments are not limited to those shown in the drawings, and can be changed as appropriate.

1 storage battery system 38 secondary battery 45 fan (cooling means)
80 Power supply board mounting plate (1st mounting plate)
80c handle 80d claw 87 electrical component mounting plate (wall, second mounting plate)
122 Electrical component mounting plate opening (opening)
128 1st electrical parts (electrical parts, parts to be cooled)
129 2nd electrical parts (electrical parts, other parts)
130 Main circuit board assembly

Claims (8)

With secondary batteries that repeatedly charge and discharge,
An electrical component for controlling the secondary battery,
The electrical component is provided above or to the side of the secondary battery,
The storage battery system characterized in that the electric parts are arranged to be separated into a wall part and a parts to be cooled and other parts. It further comprises cooling means for cooling the electrical component,
Placing the part to be cooled behind the wall;
Placing the cooling means on the rear side of the wall which is the same side as the part to be cooled;
The storage battery system according to claim 1, wherein the cooling means is configured to be removable from the front side of the wall portion. It further comprises a main circuit board assembly on which said parts to be cooled are installed,
The storage battery system according to claim 1 or 2, wherein at the same time the main circuit board assembly is removed from the wall, the component to be cooled is also removed from the wall.   The storage battery system according to claim 3, wherein the main circuit board assembly is configured to be removable from the front side of the wall portion. The main circuit board assembly is installed on a first mounting plate,
The storage battery system according to claim 3 or 4, wherein the second mounting plate as the wall portion is provided with an opening through which the component to be cooled passes.   The storage battery system according to claim 5, wherein the first mounting plate is in surface contact with the surface of the second mounting plate having the opening.   The storage battery system according to claim 5 or 6, wherein the first attachment plate includes an engagement portion engaged with the second attachment plate.   The storage battery system according to claim 7, wherein the first attachment plate includes a handle for gripping.