JP6103244B2 - 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 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 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.

  An object of the present invention is made in view of the above-described circumstances, and 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 object receives power discharged from a power storage device mounted on a vehicle having a vehicle control unit, and converts the discharged power into AC power, and the vehicle control unit A master power receiving device having a power reception control unit capable of communicating with the master, a master cable connecting the vehicle and the master power receiving device, and a slave capable of receiving the discharge power from the master power receiving device and having the conversion unit A power receiving device; and a slave cable that connects the master power receiving device and the slave power receiving device; and the power receiving system is configured such that the vehicle and the master power receiving device are connected via the master cable, and When the master power receiving device and the slave power receiving device are connected via a slave cable, the discharge power is transmitted to the master power receiving device and The master cable is configured to be distributed to the slave power receiving device, and the master cable transmits a master connector that can be attached to the vehicle and operating power of the power reception control unit from the vehicle to the power reception control unit. The master connector has a master lock circuit that locks the master connector when the operating power is supplied from a master connector lock line provided in the master cable, and the slave cable Comprises 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, and a slave connector lock line through which the operating power is transmitted, and the first slave When the operating power is supplied from the slave connector lock line, the connector A first slave lock circuit for locking 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 has a lock circuit, a master lock distribution line that connects the master connector lock line and the slave connector lock line, a specific line that connects the operating power line and the master connector lock line, And a switching element provided on the specific line.

  According to such a configuration, the discharged power discharged from the power storage device is distributed to the master power receiving device and the slave power receiving device. Thereby, the direct-current power supplied to one conversion part becomes small. Therefore, it is possible to discharge a large-capacity power storage device while adopting a converter that supports low power.

  In addition, 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, the master connector lock line and the slave connector lock line are connected. Is done. As a result, when the switching element is turned on, operating power is simultaneously supplied to each connector lock line. Therefore, the timing at which operating power is supplied to the master connector lock circuit and the timing at which operating power is supplied to each slave lock circuit can be synchronized. Therefore, each connector can be locked simultaneously.

  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 connector lock line is a first slave connector lock wire, and the power receiving system is Receiving the discharge power from the first slave power receiving device when connected to the first slave power receiving device via two slave cables, comprising a second slave power receiving device having the conversion unit, The second slave cable includes a third slave connector that can be attached to the first slave power receiving device, a fourth slave connector that can be attached to the second slave power receiving device, and a second slave connector lock that transmits the operating power. And the third slave connector is connected to the second slave connector A third slave lock circuit that locks the third slave connector when the operating power is supplied from a second cable, and the fourth slave connector is supplied with the operating power from the second slave connector lock line. A fourth slave lock circuit that locks the fourth slave connector, and the first slave power receiving device includes a slave lock distribution line that connects the first slave connector lock line and the second slave connector lock line. It is good to have. 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 further distributed. 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. Thereby, the timing at which the operating power is supplied to each slave lock circuit can be synchronized. Therefore, each slave connector can be locked simultaneously.

  In the power receiving system, the power storage device is a main power storage device, the discharge power is DC power discharged from the main power storage device, and the operating power is supplied from a sub power storage device provided in the vehicle. The master power receiving device includes a generation circuit that generates the operation power using the discharge power, and the operation power generated by the generation circuit is turned ON / OFF of the switching element. Regardless, it may be configured to be supplied to the master lock circuit and the slave lock circuits. According to such a configuration, operating power can be supplied to each lock circuit using the discharge power of the main power storage device. Therefore, use of the sub power storage device can be suppressed, and deterioration of the sub power storage device can be suppressed.

  In the power receiving system, the master power receiving device charges the power storage device using the external power when the external power is received in a state where the master power receiving device is connected to the vehicle via the master cable. Good. According to such a configuration, since the power storage device can be charged using the master power receiving device, convenience can be improved.

  A master power receiving apparatus that achieves the above object receives discharge power of a power storage device mounted on a vehicle having a vehicle control unit, and converts the discharge power into AC power; and the vehicle control unit A power reception control unit capable of communicating with the vehicle, wherein the master power receiving device is connected to the vehicle via a master cable and is connected to the slave power receiving device via a slave cable. The master cable includes a master connector that can be attached to the vehicle, and an operating power line through which operating power of the power reception control unit is transmitted from the vehicle to the power reception control unit. The master connector is connected to the master connector when the operating power is supplied from a master connector lock wire provided on the master cable. A master lock circuit that locks the slave power, and the slave cable receives the operating power from 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. 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 includes a second slave lock circuit that locks the second slave connector when the operating power is supplied from the slave connector lock line, and the master power receiving device includes: Master lock distribution line connecting the slave connector lock line , Characterized in that it comprises a specific line for connecting the operation power line and the master connector lock line, and a switching device provided on the particular line.

  According to such a configuration, the discharge power of the power storage device is distributed to the master power receiving device and the slave power receiving device. Thereby, the direct-current power supplied to one conversion part becomes small. Therefore, it is possible to discharge a large-capacity power storage device while adopting a converter that supports low power.

  In addition, 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, the master connector lock line and the slave connector lock line are connected. Is done. As a result, when the switching element is turned on, operating power is simultaneously supplied to each connector lock line. Therefore, the timing at which operating power is supplied to the master connector lock circuit and the timing at which operating power is supplied to each slave lock circuit can be synchronized. Therefore, each connector can be locked simultaneously.

  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 explaining a power reception sequence, (a) shows the voltage mode of the 3rd terminal, (b) shows the state of a relay, (c) shows the operation mode of each master lock circuit, d) The operation mode of each slave lock circuit is shown, and (e) shows the voltage mode of the fifth terminal.

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 includes a DC power (discharge) of a main battery B1 from a vehicle C having a main battery B1 as a power storage device (main power storage device) and a sub battery B2 as a sub power storage device. A master power receiving device 11 capable of receiving (power) 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 apparatus 11 is a portable type that can move, and controls the DC / AC converter 21 as a conversion unit that converts DC power discharged from the main battery B1 into AC power, and the DC / AC converter 21. In addition, a master power reception control unit 22 that can communicate with a vehicle control unit (ECU) C1 mounted on the vehicle C is provided. 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 DC / AC converter 21 is supplied to the load X. The

  The plurality of slave power receiving devices 12 have the same configuration. Each slave power reception device 12 is movable and includes a DC / AC converter 21 and a slave power reception control unit 23 that controls the DC / AC converter 21. Each slave power receiving device 12 is configured to be connectable to the load X. When each slave power receiving device 12 and the load X are connected, the AC power output from the DC / AC converter 21 is the load X. To be 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. Further, the DC / AC converter 21 may be, for example, a non-insulating type, but is not limited thereto, and may be an insulating type.

  As shown in FIG. 1, the power receiving system 10 includes a master cable 13 that connects the vehicle C and the master power receiving device 11. The master cable 13 includes a vehicle-side master connector MC1 that can be attached to a vehicle inlet provided in the vehicle C, and a power-receiving-side master connector that can be attached to a master power receiving device 11, more specifically, an input inlet provided in the master power receiving device 11. MC2 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 (battery voltage) of the sub-battery B2 is set to be the same as the DC power (voltage) at which the master power reception control unit 22 can operate. Focusing on this point, it can be said that the third terminal Tm3 and the first terminal Tm1 are operating power terminals to which the operating power of 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 (DC power of the sub-battery B2) 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 DC / AC converter 21 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 DC / AC converter 21 are connected. Then, the vehicle control unit C1 and the master power reception control unit 22 are connected, and operating power of the master power reception control unit 22 that is DC power of the sub-battery B2 is supplied to the master power reception control unit 22. Further, the vehicle control unit C1 and the master power reception control unit 22 can communicate with each other.

  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 C <b> 2 is turned on, DC power is discharged from the main battery B <b> 1, and the discharged DC power is supplied to the DC / AC converter 21.

  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. For convenience of explanation, in the following explanation, the DC power discharged from the main battery B1 is also simply referred to as discharge power, and the DC power discharged from the sub battery B2 is simply referred to as operation power.

  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. The master power receiving apparatus 11 includes connector lock lines Lm11 and Lm12 connected to the connector lock terminals Tm11 and Tm12. The connector lock lines Lm11 and Lm12 branch into two at branch points P1 and P2, respectively. One is connected to the third wiring Wm3 and the first wiring Wm1 as operating power lines, and the other is the first as a master discharge power line. The fifth wiring Wm5 and the sixth wiring Wm6 are connected. Specifically, the first branch line Lm11a of the first connector lock line Lm11 is connected to the third wiring Wm3 (specifically, the third connection line Lm3), and the first branch line Lm12a of the second connector lock line Lm12 is the first The wiring Wm1 (specifically, the first connection line Lm1) is connected. The second branch line Lm11b of the first connector lock line Lm11 is connected to the fifth wiring Wm5 (specifically, the fifth connection line Lm5), and the second branch line Lm12b of the second connector lock line Lm12 is the sixth wiring Wm6. (In detail, it is connected to the sixth connection line Lm6). The first branch lines Lm11a and Lm12a correspond to specific lines.

  A relay 41 as a switching element is provided on the first branch line Lm11a of the first connector lock line Lm11. The relay 41 is an OFF contact in a normal state (initial state), and is a contact that switches from an OFF state to an ON state when a switching signal is input (a predetermined voltage is applied). That is, the “normal time” is a state where a predetermined voltage is not applied. The master power reception control unit 22 is configured to output a switching signal to the relay 41.

Further, a step-down circuit 42 is provided on the second branch lines Lm11b and Lm12b as a generation circuit that generates operating power of the master power reception control unit 22 using discharge power.
According to this configuration, when the contactor C2 is in the OFF state and the relay 41 is in the OFF state in a situation where the vehicle C and the master power receiving device 11 are connected via the master cable 13, the master power receiving control unit 22 While operating power is supplied, operating power is not supplied to the master lock circuits 31 and 32. On the other hand, when the relay 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. Further, when the contactor C2 is in the ON state, the operating power generated by the step-down circuit 42 is supplied to the master lock circuits 31 and 32 regardless of whether the relay 41 is ON or OFF.

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, Ws2 through which operating power of the master power reception control unit 22 is transmitted, and slave discharge power lines Ws3, Ws4 through which discharge power is transmitted. I have.

  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.

  The master power receiving apparatus 11 includes master lock distribution lines Lm21 and Lm22 that connect the master connector lock lines Wm11 and Wm12 to the slave connector lock lines Ws1 and Ws2 of the first slave cable 14. The first master lock distribution line Lm21 connects the portion of the first connector lock line Lm11 closer to the first connector lock terminal Tm11 than the branch point P1 and the first slave terminal Ts1. The second master lock distribution line Lm22 connects the portion of the second connector lock line Lm12 closer to the second connector lock terminal Tm12 than the branch point P2 and the second slave terminal Ts2.

  The master power receiving apparatus 11 includes master discharge distribution lines Lm23 and Lm24 that connect the wirings Wm5 and Wm6 to the slave discharge power lines Ws3 and Ws4. The first master discharge distribution line Lm23 connects the fifth wiring Wm5 (specifically, the fifth connection line Lm5) and the first slave discharge power line Ws3 (specifically, the third slave terminal Ts3). The second master discharge distribution line Lm24 connects the sixth wiring Wm6 (specifically, the sixth connection line Lm6) and the second slave discharge power line Ws4 (specifically, the fourth slave terminal Ts4).

  The master discharge distribution lines Lm23 and Lm24 and the second branch lines Lm11b and Lm12b are partially shared, but the present invention is not limited to this, and each may be provided individually.

  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.

  According to this configuration, when the master power receiving device 11 and the first slave power receiving device 12a are connected via the first slave cable 14, the operating power is directed from the master power receiving device 11 to the first slave power receiving device 12a. And the discharge power are transmitted. When operating power is transmitted through the slave connector lock lines Ws1 and Ws2 of the first slave cable 14, the operating power is supplied to the slave lock circuits 51 and 52 from 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.

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, Ws2 of the second slave cable 15, and is supplied with operating power for transmitting the slave connector lock lines Ws1, Ws2. 53. Similarly, the fourth slave connector SC4 is connected to the slave connector lock lines Ws1, Ws2 of the second slave cable 15, and is supplied with operating power for transmitting the slave connector lock lines Ws1, Ws2. A slave lock circuit 54 is provided. 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 connects the first slave connector lock lines Ws1 of the slave cables 14 and 15 to each other. A first slave lock distribution line Ls1 to be connected is 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. In addition, the first slave power receiving device 12a includes a second slave lock distribution line Ls2 that connects the second slave connector lock lines Ws2 of the slave cables 14 and 15. 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 operating power received by the first slave power receiving device 12a is transmitted toward the second slave power receiving device 12b.

  The first slave power receiving device 12a connects the third slave terminal Ts3 of the second slave connector SC2 to the DC / AC converter 21 of the first slave power receiving device 12a and the third slave terminal Ts3 of the third slave connector SC3. A first slave discharge distribution line Ls3 is provided. The first slave power receiving device 12a connects the fourth slave terminal Ts4 of the second slave connector SC2 to the DC / AC converter 21 of the first slave power receiving device 12a and the fourth slave terminal Ts4 of the third slave connector SC3. A second slave discharge distribution line Ls4 is provided. Discharge power supplied from the master power receiving device 11 is distributed to the DC / AC converter 21 and the second slave power receiving device 12b of the first slave power receiving device 12a.

  In addition, the first slave power receiving device 12a includes a step-down circuit 42 that converts (steps down) the discharge power transmitted through the slave discharge distribution lines Ls3 and Ls4 into operating power and supplies the power to the slave power reception control unit 23. ing. The slave power reception control unit 23 controls the DC / AC converter 21 based on the operating power supplied from the step-down circuit 42.

  Incidentally, it can be said that the slave lock distribution lines Ls1 and Ls2 connect the slave connector lock lines Ws1 and Ws2 of the slave cables 14 and 15, respectively. The slave discharge distribution lines Ls3, Ls4 connect the slave discharge power lines Ws3, Ws4 of the first slave cable 14 and the DC / AC converter 21, and the slave discharge power lines Ws3, Ws4 of the slave cables 14, 15 respectively. It can be said that they connect each other. 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.

  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. The voltage mode of the third terminal Tm3 in FIG. 3A is shown with reference to the potential (ground) of the first terminal Tm1, and the voltage mode of the fifth terminal Tm5 in FIG. 3E is the sixth terminal Tm6. The potential (ground) is shown as a reference.

  Assume that the vehicle C, the master power receiving device 11 and the slave power receiving devices 12a and 12b are connected at the timing t0 shown in FIG. Specifically, the vehicle C and the master power receiving device 11 are connected via the master cable 13, the master power receiving device 11 and the first slave power receiving device 12a are connected via the first slave cable 14, and the second slave cable. 15, the first slave power receiving device 12 a and the second slave power receiving device 12 b are connected. In this case, the DC / AC converters 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.

  Further, as shown in FIG. 3A, operating power is supplied to the master power reception control unit 22 by connecting the vehicle C and the master power receiving device 11. Here, as shown in FIG. 3B, since the relay 41 is in the OFF state at the timing t0, the operating power is not supplied to the lock circuits 31, 32, 51 to 54. Yes. Therefore, as shown in FIG. 3C and FIG. 3D, the lock circuits 31, 32, 51 to 54 are in the unlocked state (not locked) where the connectors MC1, MC2, SC1 to SC4 are not locked. State).

  Thereafter, based on the fact that the operating power is supplied from the vehicle C, the master power reception control unit 22 exchanges information with the vehicle control unit C1 through the wirings Wm2, Wm4, Wm8, and Wm9, thereby discharging. It is determined whether or not it may be performed (whether or not the DC power of the main battery B1 can be received).

  When the master power reception control unit 22 determines that the vehicle C can discharge the master power reception device 11, the master power reception control unit 22 switches to the relay 41 at the timing t1 as shown in FIG. A signal is output and the relay 41 is switched from the OFF state to the ON state. As a result, operating power is simultaneously supplied to the lock circuits 31, 32, 51 to 54. Therefore, as shown in FIGS. 3C and 3D, the lock circuits 31, 32, 51 to 54 are simultaneously locked, and the connectors MC1, MC2, SC1 to SC4 are simultaneously locked.

  Thereafter, at timing t2, the master power reception control unit 22 issues a discharge request to the vehicle control unit C1 via the tenth wiring Wm10, and the vehicle control unit C1 turns on the contactor C2 in response to the discharge request. State. Thereby, the discharge of the main battery B1 is started. The discharge power is distributed to the master power receiving device 11 and the slave power receiving devices 12a and 12b. The distributed discharge power is converted into AC power by the DC / AC converters 21 of the master power receiving device 11 and the slave power receiving devices 12a and 12b, and is supplied to each load X.

  As shown in FIG. 3B, at the timing t3, the master power reception control unit 22 switches the relay 41 from the ON state to the OFF state. In this case, operating power is supplied from the step-down circuit 42 to each of the lock circuits 31, 32, 51 to 54. Therefore, as shown in FIGS. 3C and 3D, the lock circuits 31, 32, 51 to 54 maintain the locked state.

  As shown in FIG. 3E, the discharge of the main battery B1 is completed at the timing t4. Then, the supply of operating power to the lock circuits 31, 32, 51 to 54 is stopped. Thereby, as shown in FIGS. 3C and 3D, the master lock circuits 31 and 32 and the slave lock circuits 51 to 54 are simultaneously released. As a result, the connectors MC1, MC2, SC1 to SC4 can be removed.

  As described above, 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. In this case, the lock circuits 31, 32, 51 to 54 are connected in parallel. For this reason, the lock timings of the connectors MC1, MC2, SC1 to SC4 (operation power supply timings to the lock circuits 31, 32, 51 to 54) are synchronized.

According to the embodiment described above in detail, the following effects are obtained.
(1) The power receiving system 10 that receives the discharge power of the main battery B1 mounted on the vehicle C includes a master power receiving device 11 having a DC / AC converter 21 and a master power receiving control unit 22, and the vehicle C and the master power receiving device 11. And a master cable 13 for connecting the two. 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 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, and the master power receiving apparatus 11 includes the lines Wm5 and Wm6 through which the discharge power is transmitted among the lines Wm1 to Wm12 of the master cable 13 and the slave discharge. Master discharge distribution lines Lm23 and Lm24 for connecting the power lines Ws3 and Ws4 are provided. The first slave power receiving device 12a includes slave discharge distribution lines Ls3 and Ls4 that connect the slave discharge power lines Ws3 and Ws4 to the DC / AC converter 21. Thereby, the discharge power from the main battery B1 is distributed to the DC / AC converter 21 of the master power receiving apparatus 11 and the DC / AC converter 21 of the first slave power receiving apparatus 12a. Therefore, the DC power supplied to each DC / AC converter 21 is reduced. Therefore, it is possible to discharge the large-capacity main battery B1 while adopting a DC / AC converter 21 that supports 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 DC / AC converter 21 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 DC / AC converter 21 corresponding to the capacity of the main battery B1 mounted on the large vehicle is adopted, there is a concern about the increase in size and weight of the DC / AC converter 21. 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 an operating power line through which the operating power of the master power receiving control unit 22 is transmitted. As a third wiring Wm3 and a first wiring Wm1, and master connector lock lines Wm11, 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.

  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. Slave connectors SC1 and SC2 include slave lock circuits 51 and 52 that lock slave connectors SC1 and SC2 when operating power is supplied.

  In such a configuration, 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. When connected, the slave lock circuits 51 and 52 and the master lock circuits 31 and 32 are connected in parallel. Specifically, the master lock circuits 31 and 32 are connected in parallel via master connector lock lines Wm11 and Wm12, and the slave lock circuits 51 and 52 are connected in parallel via slave connector lock lines Ws1 and Ws2. It is connected to the. The master power receiving apparatus 11 includes master lock distribution lines Lm21 and Lm22 that connect the master connector lock lines Wm11 and Wm12 and the slave connector lock lines Ws1 and Ws2. Thereby, the timing at which the operating power is supplied to the lock circuits 31, 32, 51, 52 is synchronized. Accordingly, the connectors MC1, MC2, SC1, and SC2 can be locked simultaneously, and the locks of the connectors MC1, MC2, SC1, and SC2 can be simultaneously released. Therefore, the power reception sequence can be performed smoothly.

  (3) In particular, the master power receiving apparatus 11 includes first branch lines Lm11a and Lm12a (specific lines) that connect the master connector lock lines Wm11 and Wm12 to the wirings Wm3 and Wm1 through which the operating power is transmitted in the master cable 13. The relay 41 is provided on the first branch line Lm11a. According to this configuration, even when the relay 41 is in the OFF state, each lock circuit 31 is provided even when the operating power is supplied to the master power reception control unit 22 via the third wiring Wm3 and the first wiring Wm1. , 32, 51, 52 are not supplied with operating power. On the other hand, when the relay 41 is turned on, the operating power from the third wiring Wm3 and the first wiring Wm1 is supplied to the master connector lock lines Wm11 and Wm12 and the slave connector lock lines Ws1 and Ws2, and each lock circuit 31 is operated. , 32, 51, 52 are simultaneously supplied with operating power. Thus, the connectors MC1, MC2, SC1, and SC2 can be locked at a desired timing without the master power reception control unit 22 directly supplying operating power.

  (4) 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 DC / AC converter. A second slave power receiving device 12b having 21 is provided. Specifically, when the first slave power receiving device 12a and the second slave power receiving device 12b are connected via the second slave cable 15, the DC / AC converter 21 of the first slave power receiving device 12a and the second slave power receiving device are connected. The DC / AC converter 21 of the device 12b is connected in parallel. In other words, the master power receiving device 11 and each of the slave power receiving devices 12a and 12b are daisy chain connected so that the discharge power is distributed. Thereby, further dispersion of the discharge power can be achieved.

  In this configuration, the second slave cable 15 transmits operating power to the third slave connector SC3 that can be attached to the first slave power receiving device 12a and the fourth slave connector SC4 that can be attached to the second slave power receiving device 12b. Slave connector lock lines Ws1, Ws2. Slave connectors SC3 and SC4 include slave lock circuits 53 and 54 connected to slave connector lock lines Ws1 and Ws2. The first slave power receiving device 12a includes slave lock distribution lines Ls1, Ls2 that connect the slave connector lock lines Ws1, Ws2 of the slave cables 14, 15. Thereby, each lock circuit 31, 32, 51-54 is connected in parallel by connecting the vehicle C, the master power receiving apparatus 11, and each slave power receiving apparatus 12a, 12b. Therefore, the timing which locks each connector MC1, MC2, SC1-SC4 can be synchronized.

  (5) In the configuration in which the operating power of the master power reception control unit 22 is supplied from the sub-battery B2, the master power receiving apparatus 11 includes a step-down circuit 42 that generates the operating power using the discharged power from the main battery B1. . The power receiving system 10 (master power receiving device 11) is configured such that the operating power from the step-down circuit 42 is supplied to the lock circuits 31, 32, 51 to 54 regardless of whether the relay 41 is on or off. Has been. Specifically, the master power receiving apparatus 11 includes connector lock lines Lm11 and Lm12 connected to the master connector lock lines Wm11 and Wm12. The connector lock lines Lm11, Lm12 branch into two in the middle, and the first branch lines Lm11a, Lm12a are connected to the wirings Wm3, Wm1 (connection lines Lm3, Lm1), while the second branch lines Lm11b, Lm12b is connected to wirings Wm5 and Wm6 (connection lines Lm5 and Lm6). A step-down circuit 42 is provided on the second branch lines Lm11b and Lm12b. Thereby, since electric power can be supplied to each lock circuit 31, 32, 51-54 using the discharge electric power of main battery B1, use of sub battery B2 can be suppressed. Therefore, deterioration of sub battery B2 can be suppressed.

  More specifically, when the sub battery B2 is used for a long time to supply power to the lock circuits 31, 32, 51 to 54, 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 the present embodiment, when the main battery B1 is discharged, power is supplied to the lock circuits 31, 32, 51 to 54 using the discharge power of the main battery B1 instead of the sub battery B2. Therefore, the use (usage capacity) of the sub-battery B2 can be suppressed. Therefore, deterioration of sub battery B2 can be suppressed.

  (6) The master lock distribution lines Lm21 and Lm22 that connect the master connector lock lines Wm11 and Wm12 and the slave connector lock lines Ws1 and Ws2 are connected to the connector lock terminals Tm11 and Lm12 at the connector lock terminals Tm11 and Lm12. It is connected to the portion on the Tm12 side. Thus, both the operating power from the third wiring Wm3 and the first wiring Wm1 and the operating power from the step-down circuit 42 are supplied to the slave lock circuits 51 to 54. Accordingly, the lock circuits 31, 32, 51 to 54 can be suitably synchronized.

In addition, you may change the said embodiment as follows.
The relay 41 is provided on the first branch line Lm11a, but may be provided on the first branch line Lm12a instead of or in addition to this. That is, “on a specific line” means at least one of the two first branch lines Lm11a and Lm12a as the specific line.

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.
○ 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 relay 41 and the first branch lines Lm11a and Lm12a may be omitted. In this case, the master power reception control unit 22 and the connector lock lines Lm11 and Lm12 may be connected so that the master power reception control unit 22 supplies operating power.

In the embodiment, the relay 41 is used as a switching element. However, the present invention is not limited to this, and any switching element that is normally off may be used.
The step-down circuit 42 may generate power having a voltage higher than the operating power as the driving power for each of the lock circuits 31, 32, 51 to 54. That is, the driving power generated by the step-down circuit 42 and the operating power supplied from the third terminal Tm3 and the first terminal Tm1 do not necessarily match.

The step-down circuit 42 may be omitted. In this case, the relay 41 may be maintained in the ON state until the main battery B1 is completely discharged.
○ The sub-battery B2 may be omitted. In this case, the vehicle C is provided with a step-down circuit 42 that generates operating power using the DC power of the main battery B1, and the operating power from the step-down circuit 42 is supplied to the third terminal Tm3 and the first terminal Tm1. It may be.

  The vehicle C is arbitrary as long as it has a power storage device, and may be an EV, FCV, or the like, for example. The 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, and may be an electric double layer capacitor, for example. .

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.
○ Information may be exchanged between the master power receiving device 11 and the slave power receiving device 12 or between the slave power receiving devices 12. For example, the slave power reception control unit 23 determines whether or not an abnormality has occurred periodically during power reception, and when an abnormality has occurred, transmits an abnormality occurrence signal to the upstream power receiving apparatus. The power receiving apparatus that has received the abnormality occurrence signal transmits the notification to a further upstream apparatus. As a result, the master power receiving apparatus 11 receives the abnormality occurrence signal. When the master power receiving apparatus 11 receives the abnormality occurrence signal, the master power receiving apparatus 11 may execute an abnormality handling process such as stopping the discharge, for example. In this case, the slave cable may include a signal line for transmitting a control signal such as an abnormality occurrence signal.

  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 DC / AC converter 21. 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.

  The master power receiving apparatus 11 may be configured to include a DC / AC converter 21 and an AC / DC converter that converts AC power into DC power separately instead of the bidirectional converter. . 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 passing through the DC / AC converter 21.

  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, 21 ... DC / AC converter (conversion unit), 22 ... master power reception control unit (power reception control unit), 31, 32 ... master lock circuit, 41 ... relay (switching element), 42 ... step-down circuit (generation circuit), 51 to 54 ... slave Lock circuit, B1 ... main battery, B2 ... sub battery, 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 line, Lm21, Lm22 ... Master lock distribution line, Ls1, Ls2 ... Slave Click dispensing line, Lm11a, Lm11b ... first branch line (specific line).

Claims (5)

In a power receiving system for receiving discharged power discharged from a power storage device mounted on a vehicle having a vehicle control unit,
A converter that converts the discharge power into AC power; and a master power receiving device that includes 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 the converter;
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;
An operating power line through which the operating power of the power reception control unit is transmitted from the vehicle toward the power reception control unit;
With
The master connector has a master lock circuit that locks the master connector when the 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 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:
A master lock distribution line connecting the master connector lock line and the slave connector lock line;
A specific line connecting the operating power line and the master connector lock line;
A switching element provided on the specific 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; and the slave connector lock line is a first slave connector lock line;
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 has a converter. A power receiving device,
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 connector lock line through which the operating power is transmitted;
With
The third slave connector includes 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 power receiving system according to claim 1, wherein the first slave power receiving device includes a slave lock distribution line that connects the first slave connector lock line and the second slave connector lock line. The power storage device is a main power storage device,
The discharge power is DC power discharged from the main power storage device,
The operating power is DC power supplied from a sub power storage device provided in the vehicle,
The master power receiving apparatus includes a generating circuit that generates the operating power using the discharge power, and the operating power generated by the generating circuit is the master lock circuit regardless of ON / OFF of the switching element. The power receiving system according to claim 1 or 2, wherein the power receiving system is configured to be supplied to each of the slave lock circuits.   The master power receiving device charges the power storage device using the external power when receiving external power in a situation where the master power receiving device is connected to the vehicle via the master cable. The power receiving system according to any one of the above. In a master power receiving device that receives discharged electric power discharged from a power storage device mounted on a vehicle having a vehicle control unit,
A converter for converting the discharge power into AC power;
A power reception control unit capable of communicating with the vehicle control unit;
With
The master power receiving device distributes the discharge power to the slave power receiving device when connected to the vehicle via a master cable and connected to the slave power receiving device via a slave cable,
The master cable is
A master connector attachable to the vehicle;
An operating power line through which the operating power of the power reception control unit is transmitted from the vehicle toward the power reception control unit;
With
The master connector has a master lock circuit that locks the master connector when the 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 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:
A master lock distribution line connecting the master connector lock line and the slave connector lock line;
A specific line connecting the operating power line and the master connector lock line;
A switching element provided on the specific line;
A master power receiving apparatus comprising: