JP6233258B2 - Power receiving system and master power receiving apparatus - Google Patents

Description

  The present invention relates to a power receiving system and a master power receiving apparatus.

  Conventionally, a charging device for charging a power storage device mounted on a vehicle is known (see, for example, Patent Document 1). As shown in Patent Document 1, the charging device includes a charging power storage device, and charges the power storage device mounted on the vehicle using the charging power storage device.

JP 2011-244653 A

  For example, in the case of an emergency such as a power failure or a time zone when the electricity rate is relatively high, the power storage device mounted on the vehicle may be discharged to be used as a power source. In this case, from the viewpoint of versatility and the like, a power receiving device having a conversion unit that converts discharge power discharged from the power storage device into AC power and a vehicle are connected using a cable, and the discharge power is generated by the power receiving device. A power receiving system that converts AC power and supplies the AC power to various loads is conceivable.

  Here, the conversion unit tends to increase in size and weight as the convertible power increases. For this reason, for example, when a conversion unit capable of converting large power is mounted on the power receiving device, the power receiving device can be increased in size and weight. Then, carrying around of the power receiving apparatus becomes complicated, and convenience is reduced.

  On the other hand, for example, from the viewpoint of convenience, it may be possible to mount a conversion unit corresponding to low power in the power receiving apparatus. However, the electric power to be used varies depending on the situation, and the capacity of the power storage device mounted on the vehicle varies depending on the type of vehicle. For this reason, for example, when it is desired to use a large amount of power using a vehicle having a large capacity power storage device such as a bus, the power receiving device having a conversion unit corresponding to the small power cannot cope with it.

  The present invention has been made in view of the above-described circumstances, and an object of the present invention is to provide a power receiving system and a master power receiving device that can suitably receive discharged power discharged from a power storage device mounted on a vehicle.

  A power receiving system that achieves the above-described object is to receive discharge power discharged from a main power storage device mounted on a vehicle having a vehicle control unit, and a first conversion unit that converts the discharge power into AC power; And a master power receiving device having a power receiving control unit capable of communicating with the vehicle control unit, a master cable connecting the vehicle and the master power receiving device, and receiving the discharge power from the master power receiving device, A slave power receiving device having a second conversion unit that converts the discharge power into AC power; and a slave cable that connects the master power receiving device and the slave power receiving device, the power receiving system via the master cable The vehicle and the master power receiving device are connected, and the master power receiving device and the slave power receiving device are connected via the slave cable. When connected, the discharge power is distributed to the master power receiving device and the slave power receiving device, and the master cable is connected to a master connector that can be attached to the vehicle, and the discharge power is transmitted. The master connector has a master lock circuit that locks the master connector when operating power is supplied from a master connector lock line provided in the master cable, and the slave The cable includes a first slave connector that can be attached to the master power receiving device, a second slave connector that can be attached to the slave power receiving device, a slave discharge power line through which the discharge power is transmitted, and the operating power. A slave connector lock line, wherein the first slave connector is connected to the slave connector. A first slave lock circuit that locks the first slave connector when the operating power is supplied from a slave connector lock line, and the second slave connector is supplied with the operating power from the slave connector lock line. And a second slave lock circuit that locks the second slave connector when the master power receiving device supplies the operating power to the master connector lock line using a sub power storage device provided in the vehicle. Operating power supply circuit, a master discharge distribution line that connects the master discharge power line and the slave discharge power line, a master lock distribution line that connects the master discharge power line and the slave connector lock line, and the master lock distribution A generation circuit provided on a line and generating the operating power using the discharge power And a master lock control switching element provided on the master lock distribution line, and a master discharge control switching element provided on the master discharge distribution line.

  According to this configuration, in a situation where the vehicle, the master power receiving device, and the slave power receiving device are connected via the master cable and the slave cable, and the discharge power of the main power storage device is supplied to the master power receiving device, the master lock When the control switching element is switched from the non-conductive state to the conductive state, the operating power generated by the generation circuit is supplied to the slave connector lock line. Thus, the slave connector can be locked using the main power storage device.

  Moreover, after the slave connector is locked, the discharge power can be supplied to the slave power receiving device by switching the master discharge control switching element from the non-conductive state to the conductive state. Thereby, the discharge power is distributed to the master power receiving device and the slave power receiving device. Therefore, since the direct-current power supplied to each conversion unit becomes small, it is possible to discharge the large-capacity main power storage device while adopting the first conversion unit and the second conversion unit corresponding to low power. It becomes.

  From the above, it is possible to lock the slave connector and supply the discharge power to the slave power receiving device at an appropriate timing while suppressing the use of the sub power storage device, and to reduce the discharge power of the main power storage device. It can receive electric power suitably.

  In the power receiving system, the slave power receiving device is a first slave power receiving device, the slave cable is a first slave cable, the slave discharge power line is a first slave discharge power line, and the slave connector lock line is a first slave power cable. A slave connector lock line, wherein the power receiving system receives the discharge power from the first slave power receiving device when connected to the first slave power receiving device via a second slave cable, A second slave power receiving device having a second conversion unit, wherein the second slave cable is a third slave connector attachable to the first slave power receiving device; and a fourth slave attachable to the second slave power receiving device. A connector, a second slave discharge power line through which the discharge power is transmitted, and the operating power A second slave connector lock line through which the third slave connector locks the third slave connector when the operating power is supplied from the second slave connector lock line. The fourth slave connector includes a fourth slave lock circuit that locks the fourth slave connector when the operating power is supplied from the second slave connector lock line; The slave power receiving device includes a slave discharge distribution line that connects the first slave discharge power line and the second slave discharge power line, and a slave lock distribution that connects the first slave connector lock line and the second slave connector lock line. And a line. According to this configuration, the first slave power receiving device and the second slave power receiving device are connected via the second slave cable, so that the discharge power can be distributed to the master power receiving device and each slave power receiving device. Thereby, it can respond suitably to larger discharge electric power. In addition, when the first slave power receiving device and the second slave power receiving device are connected via the second slave cable, the first slave connector lock line and the second slave connector lock line are connected. As a result, the operating power generated by the generation circuit can be supplied to each slave lock circuit.

  In the power receiving system, the first slave power receiving device includes a slave lock control switching element provided on the slave lock distribution line, and a slave discharge control switching element provided on the slave discharge distribution line. It is good to be. According to such a configuration, it is possible to individually control the lock timing of the third slave connector and the fourth slave connector and the supply timing of the discharge power to the second slave power receiving device. Thereby, for example, after confirming that the discharge power is normally supplied to the first slave power receiving device, the third slave connector and the fourth slave connector can be locked. And after confirming the lock | rock of a 3rd slave connector and a 4th slave connector, supply of the discharge power to a 2nd slave power receiving apparatus can be performed. Therefore, it is possible to suitably distribute the discharge power to a plurality of slave power receiving devices connected in a daisy chain.

  In the power receiving system, the master cable includes an operating power line through which the operating power from the sub power storage device is transmitted, and the operating power supply circuit connects the operating power line and the master connector lock line. A supply line and a supply control switching element provided on the operating power supply line may be provided. According to such a configuration, the master connector can be locked at a desired timing before the discharge power of the main power storage device is supplied to the master power receiving device by switching the supply control switching element from the non-conductive state to the conductive state. it can.

  In the power receiving system, the master power receiving apparatus may be configured such that the operating power generated by the generating circuit is supplied to the master connector lock line. According to this configuration, after the discharge power is supplied to the master power receiving device, the operating power generated by the generation circuit is supplied to the master connector lock line. Thereby, the master connector can be locked without using the sub power storage device. Thus, use of the sub power storage device can be suppressed.

  A master power receiving apparatus that achieves the above-described object receives a discharged power discharged from a main power storage device mounted on a vehicle having a vehicle control unit, and converts the discharged power into AC power. And a power reception control unit communicable with the vehicle control unit, wherein the master power receiving device is connected to the vehicle via a master cable and converts the discharge power into AC power via a slave cable. When connected to a slave power receiving device having a second conversion unit, the discharge power is distributed to the slave power receiving device, the master cable is a master connector that can be attached to the vehicle, and the discharge power The master connector is provided with operating power from a master connector lock line provided on the master cable. A master lock circuit that locks the master connector when the slave cable is connected, and the slave cable includes a first slave connector that can be attached to the master power receiving device, and a second slave connector that can be attached to the slave power receiving device; A slave discharge power line to which the discharge power is transmitted; and a slave connector lock line to which the operation power is transmitted. The first slave connector is provided when the operation power is supplied from the slave connector lock line. A first slave lock circuit that locks the first slave connector, wherein the second slave connector locks the second slave connector when the operating power is supplied from the slave connector lock line; The master power receiving device is provided in the vehicle. An operating power supply circuit that supplies the operating power to the master connector lock line using the sub power storage device, a master discharge distribution line that connects the master discharge power line and the slave discharge power line, the master discharge power line, and the A master lock distribution line that connects a slave connector lock line, a generation circuit that is provided on the master lock distribution line and generates the operating power using the discharge power, and is provided on the master lock distribution line A master lock control switching element and a master discharge control switching element provided on the master discharge distribution line are provided.

  According to this configuration, in a situation where the vehicle, the master power receiving device, and the slave power receiving device are connected via the master cable and the slave cable, and the discharge power of the main power storage device is supplied to the master power receiving device, the master lock When the control switching element is switched from the non-conductive state to the conductive state, the operating power generated by the generation circuit is supplied to the slave connector lock line. Thus, the slave connector can be locked using the main power storage device.

  Moreover, after the slave connector is locked, the discharge power can be supplied to the slave power receiving device by switching the master discharge control switching element from the non-conductive state to the conductive state. Thereby, the discharge power is distributed to the master power receiving device and the slave power receiving device. Therefore, since the direct-current power supplied to each conversion unit becomes small, it is possible to discharge the large-capacity main power storage device while adopting the first conversion unit and the second conversion unit corresponding to low power. It becomes.

  From the above, it is possible to lock the slave connector and supply the discharge power to the slave power receiving device at an appropriate timing while suppressing the use of the sub power storage device, and to reduce the discharge power of the main power storage device. It can receive electric power suitably.

  According to the present invention, the discharged power discharged from the power storage device mounted on the vehicle can be suitably received.

The block diagram which shows the electric constitution of a receiving system. The block diagram which shows the electric constitution of a receiving system. It is a timing chart for demonstrating a power receiving sequence, (a) shows the state of a supply control switching element, (b) shows the state of each master lock circuit, (c) shows the discharge electric power to a master power receiving apparatus. (D) shows the state of the master lock control switching element, (e) shows the state of the first slave lock circuit and the second slave lock circuit, and (f) shows the state of the master discharge control switching element. (G) shows the supply mode of the discharge power to the first slave power receiving device, (h) shows the state of the slave lock control switching element, and (i) shows the third slave lock circuit and the fourth slave lock. The circuit state is shown, (j) shows the state of the slave discharge control switching element, and (k) shows the discharge power supply mode to the second slave power receiving device.

Hereinafter, an embodiment of a power receiving system and a master power receiving apparatus will be described.
As shown in FIGS. 1 and 2, the power receiving system 10 receives DC power (discharge power) of the main battery B1 from a vehicle C having a main battery B1 as a main power storage device and a sub battery B2 as a sub power storage device. And a plurality of slave power receiving devices 12 capable of receiving DC power from the master power receiving device 11. The power receiving system 10 includes a master cable 13 that connects the vehicle C and the master power receiving device 11, and slave cables 14 and 15 that connect the master power receiving device 11 and the slave power receiving device 12 or the slave power receiving devices 12.

  The main battery B1 is composed of, for example, a nickel metal hydride battery or a lithium ion secondary battery. The sub-battery B2 is composed of, for example, a lead storage battery. The sub-battery B2 has a smaller capacity than the capacity of the main battery B1, and the battery voltage of the sub-battery B2 is higher than the battery voltage of the main battery B1. Low.

  The master power receiving device 11 is movable, and includes a master DC / AC converter 20 serving as a first conversion unit that converts DC power discharged from the main battery B1 into AC power, and a master DC / AC converter 20. And a master power reception control unit 22 that can communicate with a vehicle control unit (ECU) C1 mounted on the vehicle C. The master power receiving device 11 is configured to be connectable to the load X. When the master power receiving device 11 and the load X are connected, the AC power output from the master DC / AC converter 20 is supplied to the load X. Is done.

  The plurality of slave power receiving devices 12 have the same configuration. Each of the slave power receiving devices 12 is movable and movable, and a slave DC / AC converter 21 as a second conversion unit that converts DC power into AC power, and a slave that controls the slave DC / AC converter 21. And a power reception control unit 23. Each slave power receiving device 12 is configured to be connectable to a load X. When each slave power receiving device 12 and the load X are connected, the AC power output from the slave DC / AC converter 21 is loaded. X is supplied.

  In the present embodiment, the number of slave power receiving devices 12 is two. For convenience of explanation, in the following explanation, among the plurality of slave power receiving devices 12, the one connected to the master power receiving device 11 is referred to as the first slave power receiving device 12a, and the one connected to the first slave power receiving device 12a is the second. The slave power receiving device 12b is assumed. The DC / AC converters 20 and 21 may be non-insulated, for example. However, the DC / AC converters 20 and 21 are not limited to this, and may be insulated.

  As shown in FIG. 1, the master cable 13 is connected to a vehicle-side master connector MC1 that can be attached to a vehicle inlet provided in the vehicle C, a master power receiving device 11, and more specifically, an input inlet provided in the master power receiving device 11. The power receiving side master connector MC2 which can be attached is provided. By attaching the vehicle-side master connector MC1 to the vehicle C and attaching the power-receiving-side master connector MC2 to the master power receiving device 11, the vehicle C and the master power receiving device 11 are connected via the master cable 13.

  The first slave cable 14 that connects the master power receiving device 11 and the first slave power receiving device 12a includes a master power receiving device 11, more specifically, a first slave connector SC1 that can be attached to an output inlet provided in the master power receiving device 11. I have. The first slave cable 14 includes a second slave connector SC2 that can be attached to the first slave power receiving device 12a, specifically, an input inlet provided in the first slave power receiving device 12a.

  As shown in FIG. 2, the second slave cable 15 for connecting the first slave power receiving device 12a and the second slave power receiving device 12b is provided in the first slave power receiving device 12a, specifically, the first slave power receiving device 12a. And a third slave connector SC3 that can be attached to the output inlet. The second slave cable 15 includes a fourth slave connector SC4 that can be attached to an input inlet provided in the second slave power receiving device 12b, specifically, the second slave power receiving device 12b.

  According to such a configuration, each of the slave connectors SC1 to SC4 is attached to the corresponding inlet, whereby the master power receiving device 11 and each of the slave power receiving devices 12a and 12b are daisy chain connected via the respective slave cables 14 and 15. .

Next, the connection mode of the vehicle C, the master power receiving device 11 and the slave power receiving devices 12a and 12b will be described together with the detailed configurations of the cables 13 to 15.
First, the connection mode between the vehicle C and the master power receiving device 11 will be described. As shown in FIG. 1, the vehicle-side master connector MC1 includes a plurality (in detail, ten) of terminals Tm1 to Tm10 according to the CHAdeMO standard. I have. When the vehicle-side master connector MC1 is attached to the vehicle inlet, the terminals Tm1 to Tm10 are connected to any one of the main battery B1, the sub battery B2, and the vehicle control unit C1.

  Specifically, the fifth terminal Tm5 is connected to the positive terminal of the main battery B1, and the sixth terminal Tm6 is connected to the negative terminal of the main battery B1 and the ground. The DC power of the main battery B1 is supplied to the fifth terminal Tm5 and the sixth terminal Tm6.

  The third terminal Tm3 is connected to the + terminal of the sub battery B2, and the first terminal Tm1 is connected to the-terminal of the sub battery B2 and the ground. The DC power of the sub-battery B2 is supplied to the third terminal Tm3 and the first terminal Tm1.

The other terminals, that is, the second terminal Tm2, the fourth terminal Tm4, the seventh terminal Tm7, the eighth terminal Tm8, the ninth terminal Tm9, and the tenth terminal Tm10 are connected to the vehicle control unit C1.
Incidentally, the DC power of the sub-battery B2 is used for operations of the master lock circuits 31 and 32 (connector lock), which will be described later, and for operations of the master power reception control unit 22. If attention is paid to this point, the third terminal Tm3 and the first terminal Tm1 can be said to be operating power terminals to which the operating power of the master lock circuits 31 and 32 and the master power reception control unit 22 is supplied.

  The vehicle-side master connector MC1 is provided with an engagement claw (latch) that engages with the vehicle inlet of the vehicle C. When the engagement claw engages, the vehicle-side master connector MC1 and the vehicle inlet are mechanically connected. Fixed.

  Furthermore, the vehicle-side master connector MC1 includes a vehicle-side master lock circuit 31 that locks the vehicle-side master connector MC1 when operating power is supplied. The vehicle-side master lock circuit 31 includes a solenoid 31a, a light emitting diode 31b, and a resistor 31c. The light emitting diode 31b and the resistor 31c are connected in series, and the solenoid 31a is connected in parallel to the series connection body of the light emitting diode 31b and the resistor 31c. The solenoid 31a electrically locks the mechanically fixed state by the engaging claw when operating power is supplied, and releases the locked state when the operating power is not supplied. . In other words, it can be said that the vehicle-side master lock circuit 31 regulates the removal of the vehicle-side master connector MC1 from the vehicle inlet.

  Similarly, the power receiving side master connector MC2 includes terminals Tm1 to Tm10. And the master cable 13 has the wiring Wm1-Wm10 which connects the terminals Tm1-Tm10 of the vehicle side master connector MC1 and the terminals Tm1-Tm10 of the power receiving side master connector MC2. Furthermore, the master power receiving apparatus 11 includes connection lines Lm1 to Lm4 and Lm7 to Lm10 that connect the terminals Tm1 to Tm4 and Tm7 to Tm10 of the power receiving side master connector MC2 and the master power receiving control unit 22, and terminals of the power receiving side master connector MC2. Connection lines Lm5 and Lm6 for connecting Tm5 and Tm6 to the master DC / AC converter 20 are provided.

  According to this configuration, when the vehicle C and the master power receiving device 11 are connected via the master cable 13, the main battery B1 and the master DC / AC converter are connected via the fifth wiring Wm5 and the sixth wiring Wm6. 20 is connected. And vehicle control part C1 and master power reception control part 22 are connected, and vehicle control part C1 and master power reception control part 22 become communicable. In addition, operating power is supplied to the master power reception control unit 22 via the third wiring Wm3 and the first wiring Wm1. The third wiring Wm3 and the first wiring Wm1 correspond to operating power lines through which operating power is transmitted.

  Incidentally, as shown in FIG. 1, the vehicle C includes a contactor (switch) C2 provided on a discharge path of the main battery B1, specifically, a line connecting the main battery B1 and the vehicle inlet. . When the contactor C2 is turned on, the DC power is discharged from the main battery B1, and the discharged DC power is supplied to the master DC / AC converter 20 via the fifth wiring Wm5 and the sixth wiring Wm6. Is done. For convenience of explanation, in the following explanation, DC power discharged from the main battery B1 is simply referred to as discharge power. The fifth wiring Wm5 and the sixth wiring Wm6 correspond to a master discharge power line through which discharge power is transmitted.

  In addition, in order to mechanically fix the vehicle side master connector MC1 such as the specific configuration of the vehicle inlet, the specific shape of the vehicle side master connector MC1 including the arrangement structure of the terminals Tm1 to Tm10, and the engaging claws. Since the specific configuration is the same as the CHAdeMO standard, the description thereof is omitted.

  As illustrated in FIG. 1, the power receiving side master connector MC2 includes a power receiving side master lock circuit 32 that locks the power receiving side master connector MC2 when operating power is supplied. Since the detailed configuration of the power receiving side master lock circuit 32 is the same as that of the vehicle side master lock circuit 31, detailed description thereof is omitted.

  The master cable 13 includes master connector lock lines Wm11 and Wm12 that connect the vehicle-side master lock circuit 31 and the power-receiving-side master lock circuit 32. The vehicle side master lock circuit 31 and the power reception side master lock circuit 32 are connected in parallel via master connector lock lines Wm11, Wm12.

  The power receiving side master connector MC2 has a first connector lock terminal Tm11 connected to the first master connector lock line Wm11 and a second connector lock terminal Tm12 connected to the second master connector lock line Wm12.

  As shown in FIG. 1, the master power receiving apparatus 11 includes an operating power supply circuit 40 that supplies operating power to the master connector lock lines Wm11 and Wm12 using the sub-battery B2. The operating power supply circuit 40 includes operating power supply lines Lm11 and Lm12 that connect wirings Wm3 and Wm1 as operating power lines and master connector lock lines Wm11 and Wm12. The first operating power supply line Lm11 connects the third wiring Wm3 (specifically, the third connection line Lm3) and the first master connector lock line Wm11 (specifically, the first connector lock terminal Tm11). The second operating power supply line Lm12 connects the first wiring Wm1 (specifically, the first connection line Lm1) and the second master connector lock line Wm12 (specifically, the second connector lock terminal Tm12).

  The operating power supply circuit 40 includes a supply control switching element 41 provided on the operating power supply lines Lm11 and Lm12 (specifically, the first operating power supply line Lm11). For example, the supply control switching element 41 is normally in an OFF state (that is, a non-conduction state), and is switched from an OFF state to an ON state (that is, a conduction state) when a switching signal is input (a predetermined voltage is applied). It is composed of a-contact relay that switches. That is, the “normal time” is an initial state where a predetermined voltage is not applied. In addition, the master power reception control unit 22 can output a switching signal to the supply control switching element 41.

  According to this configuration, when the contactor C2 is in the OFF state and the supply control switching element 41 is in the OFF state when the vehicle C and the master power receiving device 11 are connected via the master cable 13, the master power reception control unit While operating power is supplied to 22, operating power is not supplied to the master lock circuits 31 and 32. On the other hand, when the supply control switching element 41 is in the ON state, operating power is supplied to the master lock circuits 31 and 32. In this case, since the master lock circuits 31 and 32 are connected in parallel, operating power is simultaneously supplied to both.

Next, a connection mode between the master power receiving apparatus 11 and the first slave power receiving apparatus 12a will be described.
As shown in FIG. 1, the first slave cable 14 includes slave connector lock lines Ws1 and Ws2 through which operating power is transmitted, and slave discharge power lines Ws3 and Ws4 through which discharge power is transmitted.

  Each of the slave connectors SC1 and SC2 provided at both ends of the first slave cable 14 has a first slave terminal Ts1 connected to the first slave connector lock line Ws1 and a first slave terminal Ts1 connected to the second slave connector lock line Ws2. 2 slave terminals Ts2. Each of the slave connectors SC1 and SC2 includes a third slave terminal Ts3 connected to the first slave discharge power line Ws3 and a fourth slave terminal Ts4 connected to the second slave discharge power line Ws4.

  In addition, the first slave connector SC1 includes a first slave lock circuit 51 that locks the first slave connector SC1 when operating power is supplied. Similarly, the second slave connector SC2 includes a second slave lock circuit 52 that locks the second slave connector SC2 when operating power is supplied. The slave lock circuits 51 and 52 are connected to slave connector lock lines Ws1 and Ws2, respectively. That is, the slave lock circuits 51 and 52 are connected in parallel via the slave connector lock lines Ws1 and Ws2.

  The detailed configurations of the slave lock circuits 51 and 52 and the slave lock circuits 53 and 54 to be described later are the same as those of the vehicle-side master lock circuit 31, and thus detailed description thereof is omitted.

  The master power receiving apparatus 11 includes master discharge distribution lines Lm21 and Lm22 that connect wirings Wm5 and Wm6 as master discharge power lines and slave discharge power lines Ws3 and Ws4. The first master discharge distribution line Lm21 connects the fifth connection line Lm5 connected to the fifth wiring Wm5 and the first slave discharge power line Ws3 (specifically, the third slave terminal Ts3). The second master discharge distribution line Lm22 connects the sixth connection line Lm6 connected to the sixth wiring Wm6 and the second slave discharge power line Ws4 (specifically, the fourth slave terminal Ts4). That is, the master discharge distribution lines Lm21 and Lm22 of the present embodiment connect the wirings Wm5 and Wm6 and the slave discharge power lines Ws3 and Ws4 using a part of the connection lines Lm5 and Lm6.

  The master power receiving apparatus 11 includes a master discharge control switching element 61 provided on the master discharge distribution lines Lm21 and Lm22 (specifically, the first master discharge distribution line Lm21). The master discharge control switching element 61 is, for example, an a contact relay.

  The master power receiving apparatus 11 includes master lock distribution lines Lm23 and Lm24 that connect the wirings Wm5 and Wm6 to the slave connector lock lines Ws1 and Ws2. The first master lock distribution line Lm23 connects the first master discharge distribution line Lm21 connected to the fifth connection line Lm5 and the first slave connector lock line Ws1 (specifically, the first slave terminal Ts1). . The second master lock distribution line Lm24 connects the second master discharge distribution line Lm22 connected to the sixth connection line Lm6 and the second slave connector lock line Ws2 (specifically, the second slave terminal Ts2). . That is, the master lock distribution lines Lm23 and Lm24 of the present embodiment use the wiring lines Wm5 and Wm6 and the slave connector lock lines Ws1, using part of the connection lines Lm5 and Lm6 and part of the master discharge distribution lines Lm21 and Lm22. Ws2 is connected.

  The master power receiving apparatus 11 is provided on the master lock distribution lines Lm23 and Lm24, and includes a step-down circuit 62 as a generation circuit that generates operating power using discharge power. The master power receiving apparatus 11 includes a master lock control switching element 63 provided on the master lock distribution lines Lm23 and Lm24. The master lock control switching element 63 is provided on the output side of the step-down circuit 62 in the first master lock distribution line Lm23, specifically, at a portion connecting the step-down circuit 62 and the first slave terminal Ts1. The master lock control switching element 63 is, for example, an a-contact relay.

  That is, in this embodiment, the lines connected to the wirings Wm5 and Wm6 through which the discharge power is transmitted are branched into three, the master DC / AC converter 20, the slave connector lock lines Ws1 and Ws2, and the slave discharge power line. It can be said that it is connected to Ws3 and Ws4. In other words, the master power receiving apparatus 11 has a common line connected to the wirings Wm5 and Wm6 and three branch lines branched from the common line, and the first branch line is connected to the master DC / AC converter 20. The second branch line is connected to the slave connector lock lines Ws1 and Ws2, and the third branch line is connected to the slave discharge power lines Ws3 and Ws4. A step-down circuit 62 and a master lock control switching element 63 are provided on the second branch line, and a master discharge control switching element 61 is provided on the third branch line.

  The master discharge distribution lines Lm21 and Lm22 use a part of the connection lines Lm5 and Lm6, but are not limited thereto, and may be directly connected to the fifth wiring Wm5 and the sixth wiring Wm6. The same applies to the master lock distribution lines Lm23 and Lm24.

  As shown in FIG. 1, the master power receiving apparatus 11 is configured such that the operating power generated by the step-down circuit 62 is supplied to the master connector lock lines Wm11 and Wm12. Specifically, the master power receiving apparatus 11 includes master connection lock lines Lm25 and Lm26 that connect the master lock distribution lines Lm23 and Lm24 and the operating power supply lines Lm11 and Lm12. The first master connection lock line Lm25 includes a portion between the step-down circuit 62 and the master lock control switching element 63 in the first master lock distribution line Lm23, the first control power supply line Lm11 and the first supply control switching element 41. The portion between the connector lock terminal Tm11 is connected. The second master connection lock line Lm26 connects the portion between the step-down circuit 62 and the second slave terminal Ts2 in the second master lock distribution line Lm24 and the second operating power supply line Lm12.

  According to this configuration, when discharge power is supplied from the main battery B1 toward the master power receiving device 11 (specifically, when the contactor C2 is in the ON state), the discharge power is stepped down from the master DC / AC converter 20. To the circuit 62. As a result, operating power is generated by the step-down circuit 62. The generated operating power is supplied to the master lock circuits 31 and 32 regardless of whether the supply control switching element 41 is ON / OFF.

  Further, in a situation where the master power receiving device 11 and the first slave power receiving device 12a are connected via the first slave cable 14 and the discharge power is supplied toward the master power receiving device 11, the master lock control switching element The state of each of the slave connectors SC1 and SC2 is switched by ON / OFF of 63. Specifically, when the master lock control switching element 63 is switched from the OFF state (that is, the non-conductive state) to the ON state (that is, the conductive state), the operating power generated by the step-down circuit 62 is changed to the slave connector lock lines Ws1, Ws2. Is transmitted. As a result, operating power is supplied from the slave connector lock lines Ws1, Ws2 to the slave lock circuits 51, 52, and the slave connectors SC1, SC2 are locked.

  Similarly, in the above situation, whether or not the discharge power is supplied to the first slave power receiving device 12a is switched depending on ON / OFF of the master discharge control switching element 61. Specifically, when the master discharge control switching element 61 is switched from the OFF state (that is, the non-conductive state) to the ON state (that is, the conductive state), the discharge power is supplied to the first slave power receiving device 12a.

Next, a connection mode between the first slave power receiving device 12a and the second slave power receiving device 12b will be described together with a detailed configuration of each of the slave power receiving devices 12a and 12b.
As shown in FIG. 2, the second slave cable 15 that connects the first slave power receiving device 12 a and the second slave power receiving device 12 b has the same configuration as the first slave cable 14. Specifically, the second slave cable 15 includes slave connector lock lines Ws1 and Ws2 and slave discharge power lines Ws3 and Ws4. The slave connectors SC3 and SC4 provided at both ends of the second slave cable 15 are provided with slave terminals Ts1 to Ts4, respectively.

  The third slave connector SC3 is connected to the slave connector lock lines Ws1 and Ws2 of the second slave cable 15, and the third slave connector SC3 when operating power is supplied from the slave connector lock lines Ws1 and Ws2. A third slave lock circuit 53 for locking SC3 is provided. Similarly, the fourth slave connector SC4 is connected to the slave connector lock lines Ws1 and Ws2 of the second slave cable 15, and when the operating power is supplied from the slave connector lock lines Ws1 and Ws2, the fourth slave connector SC4 is connected to the slave connector lock lines Ws1 and Ws2. A fourth slave lock circuit 54 is provided to lock the four slave connector SC4. The third slave lock circuit 53 and the fourth slave lock circuit 54 are connected in parallel via the slave connector lock lines Ws1, Ws2 of the second slave cable 15.

  As shown in FIG. 2, when the first slave cable 14 and the second slave cable 15 are connected, the first slave power receiving device 12a is connected to the slave connector lock lines Ws1, Ws2 of the first slave cable 14 and the second Slave lock distribution lines Ls1, Ls2 for connecting the slave connector lock lines Ws1, Ws2 of the slave cable 15 are provided. The first slave lock distribution line Ls1 connects the first slave terminals Ts1 of the second slave connector SC2 and the third slave connector SC3. The second slave lock distribution line Ls2 connects the second slave terminals Ts2 of the second slave connector SC2 and the third slave connector SC3.

  The first slave power receiving device 12a is configured such that the discharge power from the slave discharge power lines Ws3, Ws4 of the first slave cable 14 is supplied to the slave DC / AC converter 21. Specifically, the first slave power receiving device 12a includes slave connection lines Ls3 and Ls4 that connect the slave terminals Ts3 and Ts4 of the second slave connector SC2 and the slave DC / AC converter 21.

  When the first slave cable 14 and the second slave cable 15 are connected, the first slave power receiving device 12a includes the slave discharge power lines Ws3 and Ws4 of the first slave cable 14 and the slave discharge power line Ws3 of the second slave cable 15. , Ws4, slave discharge distribution lines Ls5, Ls6 are provided. The first slave discharge distribution line Ls5 connects the first slave connection line Ls3 and the third slave terminal Ts3 of the third slave connector SC3. The second slave discharge distribution line Ls6 connects the second slave connection line Ls4 and the fourth slave terminal Ts4 of the third slave connector SC3.

  That is, in the present embodiment, the slave discharge distribution lines Ls5 and Ls6 connect the slave discharge power lines Ws3 and Ws4 of both slave cables 14 and 15 by using a part of the slave connection lines Ls3 and Ls4. In other words, the first slave power receiving device 12a converts the discharge power from the slave discharge power lines Ws3 and Ws4 of the first slave cable 14 into the slave DC / AC converter 21 and the slave discharge power lines Ws3 of the second slave cable 15. It has a bifurcated line distributed to Ws4.

  Note that the present invention is not limited to this, and the slave discharge distribution lines Ls5 and Ls6 may be directly connected to the slave terminals Ts3 and Ts4 of the second slave connector SC2 without using a part of the slave connection lines Ls3 and Ls4. Good.

  In the present embodiment, as shown in FIG. 2, the first slave power receiving device 12a includes a slave lock control switching element 71 provided on the slave lock distribution lines Ls1 and Ls2 (specifically, the first slave lock distribution line Ls1). It has. The first slave power receiving device 12a includes a slave discharge control switching element 72 provided on the slave discharge distribution lines Ls5 and Ls6 (specifically, the first slave discharge distribution line Ls5). The slave lock control switching element 71 and the slave discharge control switching element 72 are, for example, a-contact relays.

  The first slave power receiving device 12a includes a step-down circuit 62 that converts (steps down) a part of discharge power transmitted via the slave connection lines Ls3 and Ls4 into operating power and supplies the converted power to the slave power receiving control unit 23. Yes. The slave power reception control unit 23 performs switching control of the slave lock control switching element 71 and the slave discharge control switching element 72 and control of the slave DC / AC converter 21 based on the operation power supplied from the step-down circuit 62. I do.

In addition, since the specific structure of the 2nd slave power receiving apparatus 12b is the same as that of the 1st slave power receiving apparatus 12a, detailed description is abbreviate | omitted.
Incidentally, although illustration is omitted, the first slave cable 14 has a signal line for connecting the master power reception control unit 22 and the slave power reception control unit 23. When the master power receiving device 11 and the first slave power receiving device 12a are connected via the first slave cable 14, the master power receiving control unit 22 and the slave power receiving control unit 23 can exchange information.

  Similarly, the second slave cable 15 has a signal line that connects the slave power reception control units 23 of the first slave power reception device 12a and the second slave power reception device 12b. When the first slave power receiving device 12 a and the second slave power receiving device 12 b are connected via the second slave cable 15, information can be exchanged between both slave power receiving control units 23.

  In such a configuration, when the master power receiving device 11, the first slave power receiving device 12a, and the second slave power receiving device 12b are connected by the slave cables 14 and 15, the slave power receiving control unit 23 of the second slave power receiving device 12b is Information can be transmitted to the master power reception control unit 22 via the slave power reception control unit 23 of the first slave power reception device 12a.

  Next, the power reception sequence (discharge sequence) of the power reception system 10 will be described with reference to FIG. FIG. 3 is a timing chart for explaining a power receiving sequence of discharge power discharged from the main battery B1 of the vehicle C.

  Here, it is assumed that the connection of the vehicle C, the master power receiving device 11 and the slave power receiving devices 12a and 12b has already been completed. Specifically, the vehicle C and the master power receiving device 11 are connected via the master cable 13, and the master power receiving device 11 and the slave power receiving devices 12a and 12b are daisy chain connected via the slave cables 14 and 15, respectively. It shall be. In this case, the DC / AC converters 20 and 21 of the master power receiving device 11 and the slave power receiving devices 12a and 12b are connected in parallel, and the lock circuits 31, 32, and 51 to 54 are all connected in parallel.

  Incidentally, in the initial state, since the contactor C2 and the control switching elements 41, 61, 63, 71, 72 are all in the OFF state, the operating power is not supplied to the lock circuits 31, 32, 51-54. . Therefore, as shown in FIGS. 3B, 3E and 3I, the lock circuits 31, 32, 51 to 54 lock the connectors MC1, MC2, SC1 to SC4. There is no release state (unlocked state).

  On the other hand, operating power is supplied from the vehicle C to the master power reception control unit 22 by connecting the vehicle C and the master power receiving device 11 via the master cable 13. Whether the master power reception control unit 22 may perform discharge by exchanging information with the vehicle control unit C1 through the wirings Wm2, Wm4, Wm8, and Wm9 based on the supply of operating power. Whether or not (whether or not discharge power can be received) is determined.

  When the master power reception control unit 22 determines that the vehicle C can discharge the master power reception device 11, as shown in FIG. 3A, the supply control switching element 41 at the timing t1. Is output to switch the supply control switching element 41 from the OFF state to the ON state. As a result, operating power is supplied to the master connector lock lines Wm11 and Wm12, and operating power is supplied to the master lock circuits 31 and 32 from the master connector lock lines Wm11 and Wm12. Therefore, as shown in FIG. 3B, the master lock circuits 31 and 32 are in a locked state in which the master connectors MC1 and MC2 are locked.

  Thereafter, the master power reception control unit 22 confirms that the master connectors MC1 and MC2 are locked. Although the specific method of the said confirmation is arbitrary, the method etc. which provide the sensor which detects the electric current which flows into each master lock circuit 31 and 32, and confirm based on the detection result of the said sensor etc. can be considered, for example.

  After confirming that the master connectors MC1 and MC2 are locked, the master power reception control unit 22 makes a discharge request to the vehicle control unit C1 via the tenth wiring Wm10 at the timing t2. The vehicle control unit C1 turns on the contactor C2 in response to the discharge request. As a result, as shown in FIG. 3C, the main battery B <b> 1 starts to be discharged, and discharged power is supplied to the master power receiving device 11. The supplied discharge power is converted into AC power by the master DC / AC converter 20 and supplied to the load X.

  Here, as shown in FIG. 3D, the master lock control switching element 63 is in the OFF state at the timing t2. In this case, since the operating power is not supplied to the first slave lock circuit 51 and the second slave lock circuit 52, the first slave lock circuit 51 and the second slave lock circuit 52 are released as shown in FIG. State.

  Similarly, as shown in FIG. 3F, the master discharge control switching element 61 is in the OFF state at the timing t2. For this reason, as shown in FIG.3 (g), supply of the discharge power from the master power receiving apparatus 11 to the 1st slave power receiving apparatus 12a is not yet performed.

  As shown in FIG. 3A, at the timing t3, the master power reception control unit 22 switches the supply control switching element 41 from the ON state to the OFF state. Thereby, the power supply from sub battery B2 stops. Even in this case, the master lock circuits 31 and 32 are supplied with operating power from the step-down circuit 62. Therefore, as shown in FIG. 3B, the master lock circuits 31 and 32 maintain the locked state.

  That is, the master power reception control unit 22 switches the supply control switching element 41 from the ON state to the OFF state after supplying the discharge power from the vehicle C to the master power reception device 11, thereby supplying power to each master lock circuit 31, 32. It can be said that the supply source for the supply is switched from the sub battery B2 to the main battery B1.

  As shown in FIG. 3D, at the subsequent timing t4, the master power reception control unit 22 performs master lock on the condition that the discharge power is normally supplied from the vehicle C to the master power reception device 11. The control switching element 63 is switched from the OFF state to the ON state. Accordingly, the operating power is transmitted to the slave connector lock lines Ws 1 and Ws 2 of the first slave cable 14 and supplied to the first slave lock circuit 51 and the second slave lock circuit 52. Therefore, as shown in FIG. 3E, the first slave lock circuit 51 and the second slave lock circuit 52 are in a locked state that locks the first slave connector SC1 and the second slave connector SC2.

  Thereafter, the master power reception control unit 22 confirms that both slave connectors SC1 and SC2 are locked. After the confirmation, the master power reception control unit 22 switches the master discharge control switching element 61 from the OFF state to the ON state at the timing t5 as shown in FIG. Thereby, as shown in FIG.3 (g), supply of the discharge electric power to the 1st slave power receiving apparatus 12a is started. That is, the discharged power supplied from the main battery B1 is distributed to the master power receiving device 11 and the first slave power receiving device 12a.

  A specific method for confirming that each of the slave connectors SC1 to SC4 is locked is the same as the method for confirming the lock of each master connector MC1 and MC2, and therefore detailed description thereof is omitted.

  Incidentally, when the discharge power is supplied to the first slave power receiving device 12a, the step-down circuit 62 of the first slave power receiving device 12a supplies the operating power to the slave power receiving control unit 23 of the first slave power receiving device 12a. The power reception control unit 23 becomes operable. Then, the slave power reception control unit 23 controls the slave DC / AC converter 21 to convert the discharge power supplied to the slave DC / AC converter 21 into AC power and supply it to the load X.

  Thereafter, the slave power reception control unit 23 of the first slave power receiving device 12a confirms that the supply (distribution) of discharge power from the master power receiving device 11 to the first slave power receiving device 12a is normally performed. After the confirmation, the slave power reception control unit 23 switches the slave lock control switching element 71 from the OFF state to the ON state at the timing t6 as shown in FIG. As a result, as shown in FIG. 3I, the third slave lock circuit 53 and the fourth slave lock circuit 54 are in a locked state in which the third slave connector SC3 and the fourth slave connector SC4 are locked.

  Then, the slave power reception control unit 23 of the first slave power reception device 12a confirms that both slave connectors SC3 and SC4 are locked. After the confirmation, the slave power reception control unit 23 switches the slave discharge control switching element 72 from the OFF state to the ON state at the timing t7 as shown in FIG. As a result, as shown in FIG. 3 (k), the discharge power is supplied from the first slave power receiving device 12a to the second slave power receiving device 12b. That is, the discharged power discharged from the main battery B1 is distributed to the master power receiving device 11 and the slave power receiving devices 12a and 12b.

  Note that the vehicle control unit C1 switches the contactor C2 from the ON state to the OFF state when a predetermined discharge termination condition is satisfied. Thereby, the supply of the discharge power from the vehicle C to the master power receiving device 11 is stopped. Then, the supply of operating power to the lock circuits 31, 32, 51 to 54 is stopped. As a result, the lock circuits 31, 32, 51 to 54 are simultaneously released. As a result, the connectors MC1, MC2, SC1 to SC4 can be removed.

  As described above, the master lock circuits 31 and 32 are locked using the sub battery B2 before the discharge of the main battery B1 is started, while the main battery B1 is started after the discharge of the main battery B1 is started. Is used to lock the master lock circuits 31 and 32.

  In addition, the supply of discharge power to the first slave power receiving device 12a is performed after the first slave lock circuit 51 and the second slave lock circuit 52 are locked, and the discharge power to the second slave power reception device 12b is supplied. The supply is performed after the third slave lock circuit 53 and the fourth slave lock circuit 54 are locked. The main battery B1 is used to supply operating power to the slave lock circuits 51 to 54.

According to the embodiment described above in detail, the following effects are obtained.
(1) A power receiving system 10 that receives discharge power of a main battery B1 mounted on a vehicle C includes a master power receiving device 11 having a master DC / AC converter 20 and a master power receiving control unit 22, a vehicle C, and a master power receiving device. 11 is connected to the master cable 13. The power receiving system 10 is capable of receiving discharge power from the master power receiving device 11, and connects the first slave power receiving device 12a having the slave DC / AC converter 21 to the master power receiving device 11 and the first slave power receiving device 12a. The first slave cable 14 is provided. In the power receiving system 10, the vehicle C and the master power receiving device 11 are connected via the master cable 13, and the master power receiving device 11 and the first slave power receiving device 12 a are connected via the first slave cable 14. In this case, the discharged power of the main battery B1 is distributed to the master power receiving device 11 and the first slave power receiving device 12a. Specifically, the first slave cable 14 includes slave discharge power lines Ws3 and Ws4 through which discharge power is transmitted. The master power receiving apparatus 11 includes connection lines Lm5 and Lm6 that connect the wirings Wm5 and Wm6 as master discharge power lines to which the discharge power is transmitted among the wirings Wm1 to Wm12 of the master cable 13 and the master DC / AC converter 20. I have. Furthermore, the master power receiving apparatus 11 includes master discharge distribution lines Lm21 and Lm22 that connect the wirings Wm5 and Wm6 to the slave discharge power lines Ws3 and Ws4. The first slave power receiving device 12a is configured such that the discharge power from the slave discharge power lines Ws3 and Ws4 is supplied to the slave DC / AC converter 21 of the first slave power receiving device 12a. Thereby, the discharge power of the main battery B1 is distributed to the master DC / AC converter 20 and the slave DC / AC converter 21. Therefore, the DC power supplied per one of the DC / AC converters 20 and 21 is reduced. Therefore, it is possible to discharge the large-capacity main battery B1 while adopting the DC / AC converters 20 and 21 corresponding to low power.

  More specifically, the capacity of the main battery B1 may vary depending on the type of the vehicle C. For example, the capacity of the main battery B1 mounted on a large vehicle such as a bus tends to be larger than the capacity of the main battery B1 mounted on a normal vehicle. For this reason, for example, when the main battery B1 mounted on the large vehicle is connected to the master DC / AC converter 20 corresponding to the capacity of the main battery B1 mounted on the ordinary vehicle, the main battery B1 is sufficiently discharged. I can't. However, if the master DC / AC converter 20 corresponding to the capacity of the main battery B1 mounted on the large vehicle is adopted, there is a concern that the master DC / AC converter 20 may be increased in size and weight. . Then, the master power receiving apparatus 11 becomes large or heavy, and convenience is lowered.

  On the other hand, in the present embodiment, the discharge of the small-capacity main battery B1 is handled only by the master power receiving device 11, while the discharge of the large-capacity main battery B1 is handled by the master power receiving device 11. And the first slave power receiving device 12a. Thereby, it is possible to cope with both the discharge of the small-capacity main battery B1 and the discharge of the large-capacity main battery B1 while suppressing the decrease in convenience.

  Moreover, according to the said structure, the same master power receiving apparatus 11 and the 1st slave power receiving apparatus 12a can respond to both discharge of the large capacity main battery B1, and discharge of the small capacity main battery B1. Thereby, compared with the structure which provides a power receiving apparatus for exclusive use corresponding to the capacity | capacitance of main battery B1 differing, the improvement of versatility can be aimed at.

  (2) The master cable 13 includes a vehicle-side master connector MC1 that can be attached to the vehicle C, a power-receiving-side master connector MC2 that can be attached to the master power receiving device 11, and master connector lock lines Wm11 and Wm12. The master connectors MC1 and MC2 include master lock circuits 31 and 32 that lock the master connectors MC1 and MC2 when operating power is supplied from the master connector lock lines Wm11 and Wm12.

  The first slave cable 14 includes a first slave connector SC1 that can be attached to the master power receiving device 11, a second slave connector SC2 that can be attached to the first slave power receiving device 12a, and a slave connector lock that transmits operating power. Lines Ws1 and Ws2 are provided. The first slave connector SC1 includes a first slave lock circuit 51 that locks the first slave connector SC1 when operating power is supplied from the slave connector lock lines Ws1 and Ws2. The second slave connector SC2 includes a second slave lock circuit 52 that locks the second slave connector SC2 when operating power is supplied from the slave connector lock lines Ws1, Ws2.

  In such a configuration, the master power receiving device 11 includes an operating power supply circuit 40 that supplies operating power to the master connector lock lines Wm11 and Wm12 using the sub-battery B2 provided in the vehicle C, wirings Wm5 and Wm6, and a slave connector lock. Master lock distribution lines Lm23 and Lm24 for connecting the lines Ws1 and Ws2 are provided. The master power receiving apparatus 11 includes a step-down circuit 62 and a master lock control switching element 63 that generate operating power using discharge power, as provided on the master lock distribution lines Lm23 and Lm24. Furthermore, the master power receiving apparatus 11 includes a master discharge control switching element 61 provided on the master discharge distribution lines Lm21 and Lm22.

  According to this configuration, the discharge from the vehicle C to the master power receiving device 11 in a situation where the vehicle C, the master power receiving device 11 and the first slave power receiving device 12a are connected via the master cable 13 and the first slave cable 14. When the supply of power is started, operating power is generated by the step-down circuit 62. The operating power is supplied to the slave lock circuits 51 and 52 when the master lock control switching element 63 is turned on. The discharge power is supplied to the first slave power receiving device 12a when the master discharge control switching element 61 is turned on. Thereby, it is possible to safely distribute the discharge power while suppressing the use of the sub-battery B2.

  More specifically, the sub-battery B2 has a smaller capacity than the main battery B1, and the power that can be supplied is also small. For this reason, when the plurality of lock circuits are brought into the locked state using the sub-battery B2, a situation where power is insufficient occurs, and as a result, there is a problem that the plurality of lock circuits cannot be brought into the locked state. In particular, when the number of slave power receiving devices 12 connected in a daisy chain increases, the number of lock circuits increases, and thus the inconvenience easily occurs.

  Further, when the sub battery B2 is used for a long time to supply operating power to the plurality of lock circuits, the sub battery B2 is likely to deteriorate. In particular, when the sub battery B2 is a lead storage battery, the sub battery B2 is likely to deteriorate.

  On the other hand, in this embodiment, by using the main battery B1 instead of the sub battery B2, operating power is supplied to the slave lock circuits 51 and 52, so that the use of the sub battery B2 can be suppressed. Can be suppressed. In addition, by controlling the master lock control switching element 63 and the master discharge control switching element 61, the slave connectors SC1 and SC2 are locked, and then the discharge power is supplied from the master power receiving device 11 to the first slave power receiving device 12a. It can be performed. Thereby, it is possible to avoid the supply of discharge power from the master power receiving device 11 to the first slave power receiving device 12a before the slave connectors SC1 and SC2 are locked.

  (3) The power receiving system 10 receives discharge power from the first slave power receiving device 12a when connected to the first slave power receiving device 12a via the second slave cable 15, and is a slave DC / AC conversion. A second slave power receiving device 12b having a device 21 is provided. The second slave cable 15 includes a third slave connector SC3 that can be attached to the first slave power receiving device 12a, a fourth slave connector SC4 that can be attached to the second slave power receiving device 12b, and a slave connector lock that transmits operating power. Lines Ws1 and Ws2 and slave discharge power lines Ws3 and Ws4 through which discharge power is transmitted are provided. The third slave connector SC3 includes a third slave lock circuit 53 that locks the third slave connector SC3 when operating power is supplied from the slave connector lock lines Ws1 and Ws2. The fourth slave connector SC4 includes a fourth slave lock circuit 54 that locks the fourth slave connector SC4 when operating power is supplied from the slave connector lock lines Ws1, Ws2. The first slave power receiving device 12a connects slave lock distribution lines Ls1 and Ls2 that connect the slave connector lock lines Ws1 and Ws2 of the slave cables 14 and 15, and slave discharge power lines Ws3 and Ws4 of the slave cables 14 and 15 to each other. Slave discharge distribution lines Ls5 and Ls6 to be connected are provided.

  According to this configuration, when the vehicle C, the master power receiving device 11 and the slave power receiving devices 12a and 12b are connected, the discharge power can be distributed to the master power receiving device 11 and the slave power receiving devices 12a and 12b. Thereby, it is possible to cope with discharge of the main battery B1 having a larger capacity. When the master power receiving device 11 and the slave power receiving devices 12a and 12b are connected, the slave connector lock lines Ws1 and Ws2 of both slave cables 14 and 15 are connected. Thereby, the operating power generated by the step-down circuit 62 of the master power receiving apparatus 11 can be supplied to each of the slave lock circuits 51 to 54.

  (4) The first slave power receiving device 12a includes a slave lock control switching element 71 provided on the slave lock distribution lines Ls1 and Ls2, and a slave discharge control switching element 72 provided on the slave discharge distribution lines Ls5 and Ls6. It has. Thereby, the lock timing of the third slave connector SC3 and the fourth slave connector SC4 and the supply timing of the discharge power to the second slave power receiving device 12b can be individually controlled. Therefore, for example, after confirming that the discharge power is normally supplied to the first slave power receiving device 12a, the third slave connector SC3 and the fourth slave connector SC4 can be locked. Then, after confirming that the third slave connector SC3 and the fourth slave connector SC4 are locked, it is possible to supply the discharge power to the second slave power receiving device 12b. Therefore, it is possible to avoid supplying the discharge power to the second slave power receiving device 12b in a state where the third slave connector SC3 and the fourth slave connector SC4 are not locked. Therefore, it is possible to suitably distribute the discharge power to the plurality of slave power receiving devices 12 connected in a daisy chain.

  (5) The master cable 13 has a third wiring Wm3 and a first wiring Wm1 as operating power lines through which the operating power from the sub-battery B2 is transmitted. The operating power supply circuit 40 includes operating power supply lines Lm11 and Lm12 that connect the wirings Wm3 and Wm1 and the master connector lock lines Wm11 and Wm12, and a supply control switching element 41 provided on the operating power supply lines Lm11 and Lm12. have. Thus, by switching the supply control switching element 41 from the OFF state to the ON state, the master connectors MC1 and MC2 can be locked at a desired timing before the discharge power of the main battery B1 is supplied to the master power receiving device 11.

  (6) The master power receiving apparatus 11 is configured such that the operating power generated by the step-down circuit 62 is supplied to the master connector lock lines Wm11 and Wm12. Specifically, the master power receiving apparatus 11 includes master connection lock lines Lm25 and Lm26 that connect the output side of the step-down circuit 62 in the master lock distribution lines Lm23 and Lm24 and the master connector lock lines Wm11 and Wm12. Thus, the master lock circuits 31 and 32 can be locked using the operating power generated by the step-down circuit 62. In this case, after the operating power generated by the step-down circuit 62 is supplied to the master lock circuits 31 and 32, the use of the sub-battery B2 is made by switching the supply control switching element 41 from the ON state to the OFF state. Can be suppressed.

  In particular, the first master connection lock line Lm25 is connected to a portion closer to the step-down circuit 62 than the master lock control switching element 63 in the first master lock distribution line Lm23. As a result, the operating power generated by the step-down circuit 62 can be supplied to the master connector lock lines Wm11 and Wm12 regardless of whether the master lock control switching element 63 is ON / OFF.

In addition, you may change the said embodiment as follows.
The master lock control switching element 63 is provided on the first master lock distribution line Lm23, but may be provided on the second master lock distribution line Lm24 instead of or in addition to this. That is, the master lock control switching element 63 may be provided on at least one of the two master lock distribution lines Lm23 and Lm24. The same applies to the master discharge control switching element 61, the slave lock control switching element 71, the slave discharge control switching element 72, and the supply control switching element 41, as long as they are provided on at least one of the two corresponding lines.

  The slave lock control switching element 71 and the slave discharge control switching element 72 may be omitted. In this case, when the master lock control switching element 63 is turned on, the slave lock circuits 51 to 54 are simultaneously locked.

  In such a configuration, the slave power reception control unit 23 of each of the slave power reception devices 12a and 12b confirms whether or not the corresponding slave lock circuit is in the locked state, and confirms that it is in the locked state. Transmits a confirmation signal to the upstream power receiving apparatus. The slave power receiving apparatus that has received the confirmation signal transmits the confirmation signal to the upstream power receiving apparatus. Thereby, the confirmation signal of each slave power reception control unit 23 is transmitted to the master power reception control unit 22. The master power reception control unit 22 switches the master discharge control switching element 61 from the OFF state to the ON state based on the reception of the confirmation signals from all the slave power reception control units 23. Thereby, discharge power is simultaneously distributed to each slave power receiving apparatus 12a, 12b.

  The number of slave power receiving devices 12 may be three or more. In this case, each slave power receiving device may be daisy chain connected using a slave cable. When there are a plurality of slave power receiving devices 12, the slave connector lock provided on the slave cable connecting the upstream slave power receiving device and the downstream slave power receiving device, and the downstream side from the upstream slave power receiving device A series of operations of supplying discharge power to the slave power receiving apparatus may be a unit operation, and the unit operations may be sequentially performed from the upstream side to the downstream side. Further, the number of slave power receiving devices 12 may be one.

  The master cable 13 may not have the third wiring Wm3 and the first wiring Wm1 as operating power lines. In this case, the master power receiving apparatus 11 may extract operating power from the sub-battery B2 with a separate wiring from a cigar socket or the like provided in the vehicle C.

  The specific configuration of the operating power supply circuit 40 is arbitrary. For example, the operating power supply circuit 40 includes a line connecting the master power reception control unit 22 and the operating power supply lines Lm11 and Lm12, and the master power reception control unit 22 supplies the operating power. It may be a configuration.

The master lock control switching element 63 may be provided on the input side of the step-down circuit 62 in the master lock distribution lines Lm23 and Lm24.
○ The power receiving side master connector MC2 is one connector having the respective terminals Tm1 to Tm12, but is not limited thereto, and the second connector having the first connector corresponding to the CHAdeMO standard and the connector lock terminals Tm11 and Tm12. You may comprise from a connector. In this case, the master power receiving apparatus 11 may be provided with a first inlet to which the first connector is attached and a second inlet to which the second connector is attached. In such a configuration, both the first connector and the second connector are provided with lock circuits, and the two lock circuits are connected in parallel when the master cable 13 and the master power receiving device 11 are connected. It is good to be configured as follows.

The power receiving side master connector MC2 of the master cable 13 may be omitted, and the master power receiving device 11 and the master cable 13 may be unitized.
The vehicle C is arbitrary as long as it has a main power storage device and a sub power storage device, and may be an EV, FCV, or the like, for example. Further, each power storage device mounted on the vehicle C is not limited to a secondary battery such as a lithium ion secondary battery as long as it can be charged and discharged. For example, an electric double layer capacitor may be used. Good.

The slave connectors SC1 to SC4 may have the same configuration as the vehicle side master connector MC1 or the power receiving side master connector MC2.
The slave power reception control unit 23 may determine whether or not an abnormality has occurred periodically during power reception, and may transmit an abnormality occurrence signal to the upstream power receiving apparatus when an abnormality has occurred. In addition, the slave power reception control unit 23 of the slave power receiving device 12 that has received the abnormality occurrence signal may transmit the notification to a further upstream power receiving device. Thereby, the master power reception control unit 22 can receive the abnormality occurrence signal. Then, when receiving the abnormality occurrence signal, the master power reception control unit 22 may execute an abnormality handling process such as stopping the discharge, for example.

  The power receiving system 10 (master power receiving apparatus 11) may receive external power such as system power. In this case, when the master power receiving apparatus 11 receives external power in a state where the master power receiving apparatus 11 is connected to the vehicle C via the master cable 13, the master power receiving apparatus 11 charges the main battery B1 of the vehicle C using the received external power. Good. Specifically, the master power receiving apparatus 11 may include a bidirectional converter capable of bidirectional conversion between DC power and AC power, instead of the master DC / AC converter 20. According to this configuration, when the vehicle C and the master power receiving device 11 are connected using the master cable 13 and the system power source and the master power receiving device 11 are connected, the bidirectional power is supplied from the system power source. The system power is converted into DC power, and the DC power is supplied to the main battery B1. Thereby, since charging / discharging of main battery B1 is attained, the convenience can be improved.

  Note that the slave power receiving device 12 may be configured to be capable of conversion in only one direction from DC power to AC power, or configured to be capable of bidirectional conversion as described above, and charging the main battery B1. May be used to assist.

  Moreover, the master power receiving apparatus 11 may be configured to include a master DC / AC converter 20 and an AC / DC converter that converts AC power into DC power separately instead of the bidirectional converter. Good. In this case, the master power receiving apparatus 11 is configured such that external power is supplied to the AC / DC converter, and DC power output from the AC / DC converter is supplied to the main battery B1 via the wirings Wm5 and Wm6. It is good to be.

  Furthermore, the external power received by the power receiving system 10 (master power receiving apparatus 11) is not limited to AC power such as system power, but may be DC power. In this case, the master power receiving apparatus 11 may include a bypass line so that the received DC power is supplied to the main battery B1 without going through the master DC / AC converter 20.

Next, a preferable example that can be grasped from the embodiment and another example will be described below.
(A) The power reception control unit switches the master lock control switching element from the non-conduction state to the conduction state after the supply of the discharge power from the vehicle to the master power reception device via the master discharge power line, and then the master discharge. The control switching element may be switched from the non-conductive state to the conductive state.

  DESCRIPTION OF SYMBOLS 10 ... Power receiving system, 11 ... Master power receiving device, 12a ... First slave power receiving device, 12b ... Second slave power receiving device, 13 ... Master cable, 14 ... First slave cable, 15 ... Second slave cable, 20 ... Master DC / AC converter (first conversion unit), 21 ... slave DC / AC converter (second conversion unit), 22 ... master power reception control unit (power reception control unit), 31, 32 ... master lock circuit, 40 ... operating power Supply circuit 41 ... Supply control switching element 51-54 ... Slave lock circuit 61 ... Master discharge control switching element 62 ... Step down circuit (generation circuit) 63 ... Master lock control switching element 71 ... Slave lock control switching element 72 ... slave discharge control switching element, B1 ... main battery (main power storage device), B2 ... sub-bar Teri (sub power storage device), C ... vehicle, C1 ... vehicle control unit, MC1, MC2 ... master connector, SC1-SC4 ... slave connector, Wm11, Wm12 ... master connector lock wire, Ws1, Ws2 ... slave connector lock wire, Ws3 , Ws4 ... slave discharge power line, Lm11, Lm12 ... operating power supply line, Lm21, Lm22 ... master discharge distribution line, Lm23, Lm24 ... master lock distribution line, Ls1, Ls2 ... slave lock distribution line, Ls5, Ls6 ... slave discharge distribution line.

Claims (6)

In a power receiving system for receiving discharged power discharged from a main power storage device mounted on a vehicle having a vehicle control unit,
A master power receiving apparatus having a first conversion unit that converts the discharge power into AC power, and a power reception control unit capable of communicating with the vehicle control unit;
A master cable connecting the vehicle and the master power receiving device;
A slave power receiving device capable of receiving the discharge power from the master power receiving device and having a second conversion unit that converts the discharge power into AC power;
A slave cable connecting the master power receiving device and the slave power receiving device;
With
The power receiving system is configured to discharge the discharge when the vehicle and the master power receiving device are connected via the master cable and the master power receiving device and the slave power receiving device are connected via the slave cable. Power is configured to be distributed to the master power receiving device and the slave power receiving device,
The master cable is
A master connector attachable to the vehicle;
A master discharge power line through which the discharge power is transmitted;
With
The master connector has a master lock circuit that locks the master connector when operating power is supplied from a master connector lock line provided in the master cable;
The slave cable is
A first slave connector attachable to the master power receiving device;
A second slave connector attachable to the slave power receiving device;
A slave discharge power line through which the discharge power is transmitted;
A slave connector lock line through which the operating power is transmitted;
With
The first slave connector has a first slave lock circuit that locks the first slave connector when the operating power is supplied from the slave connector lock line;
The second slave connector has a second slave lock circuit that locks the second slave connector when the operating power is supplied from the slave connector lock line,
The master power receiving device is:
An operating power supply circuit for supplying the operating power to the master connector lock line using a sub power storage device provided in the vehicle;
A master discharge distribution line connecting the master discharge power line and the slave discharge power line;
A master lock distribution line connecting the master discharge power line and the slave connector lock line;
A generation circuit provided on the master lock distribution line and generating the operating power using the discharge power;
A master lock control switching element provided on the master lock distribution line;
A master discharge control switching element provided on the master discharge distribution line;
A power receiving system comprising: The slave power receiving device is a first slave power receiving device, the slave cable is a first slave cable, the slave discharge power line is a first slave discharge power line, and the slave connector lock line is a first slave connector lock line. Yes,
The power receiving system receives the discharge power from the first slave power receiving device when connected to the first slave power receiving device via a second slave cable, and includes the second conversion unit. 2 slave power receiving devices,
The second slave cable is
A third slave connector attachable to the first slave power receiving device;
A fourth slave connector attachable to the second slave power receiving device;
A second slave discharge power line through which the discharge power is transmitted;
A second slave connector lock line through which the operating power is transmitted;
With
The third slave connector has a third slave lock circuit that locks the third slave connector when the operating power is supplied from the second slave connector lock line,
The fourth slave connector includes a fourth slave lock circuit that locks the fourth slave connector when the operating power is supplied from the second slave connector lock line;
The first slave power receiving device is:
A slave discharge distribution line connecting the first slave discharge power line and the second slave discharge power line;
A slave lock distribution line connecting the first slave connector lock line and the second slave connector lock line;
The power receiving system according to claim 1, further comprising: The first slave power receiving device is:
A slave lock control switching element provided on the slave lock distribution line;
A slave discharge control switching element provided on the slave discharge distribution line;
The power receiving system according to claim 2, further comprising: The master cable includes an operating power line through which the operating power from the sub power storage device is transmitted,
The operating power supply circuit includes:
An operating power supply line connecting the operating power line and the master connector lock line;
A supply control switching element provided on the operating power supply line;
The power receiving system according to any one of claims 1 to 3, further comprising:   The power reception system according to any one of claims 1 to 4, wherein the master power reception device is configured to supply the operating power generated by the generation circuit to the master connector lock line. In a master power receiving device that receives discharged electric power discharged from a main power storage device mounted on a vehicle having a vehicle control unit,
A first converter that converts the discharge power into AC power;
A power reception control unit capable of communicating with the vehicle control unit;
With
When the master power receiving device is connected to the vehicle via a master cable and connected to a slave power receiving device having a second conversion unit that converts the discharge power into AC power via a slave cable, Distributing discharge power to the slave power receiving device,
The master cable is
A master connector attachable to the vehicle;
A master discharge power line through which the discharge power is transmitted;
With
The master connector has a master lock circuit that locks the master connector when operating power is supplied from a master connector lock line provided in the master cable;
The slave cable is
A first slave connector attachable to the master power receiving device;
A second slave connector attachable to the slave power receiving device;
A slave discharge power line through which the discharge power is transmitted;
A slave connector lock line through which the operating power is transmitted;
With
The first slave connector has a first slave lock circuit that locks the first slave connector when the operating power is supplied from the slave connector lock line;
The second slave connector has a second slave lock circuit that locks the second slave connector when the operating power is supplied from the slave connector lock line,
The master power receiving device is:
An operating power supply circuit for supplying the operating power to the master connector lock line using a sub power storage device provided in the vehicle;
A master discharge distribution line connecting the master discharge power line and the slave discharge power line;
A master lock distribution line connecting the master discharge power line and the slave connector lock line;
A generation circuit provided on the master lock distribution line and generating the operating power using the discharge power;
A master lock control switching element provided on the master lock distribution line;
A master discharge control switching element provided on the master discharge distribution line;
A master power receiving apparatus comprising: