Discharge assembly, power supply system, and power supply method

Abstract

Disclosed are a discharge assembly, a power supply system, and a power supply method. The discharge assembly (100, 100B, 500) includes: a first end portion (P1, P1B, P51) that inputs electric power from a connected discharge port (210, 210B); a first voltage line (L11, L11B), a second voltage line (L12, L12B), and a neutral line (L13, L13B); and a second end portion (P2, P2B, P52) that outputs a first AC power and a second AC power. The first AC power applies a first voltage between the first voltage line and the neutral line. The second AC power applies a second voltage between the second voltage line and the neutral line. The second end portion includes a first socket (To1, To1B, To5) and a second socket (To2, To2B, To6). The first socket has a first voltage terminal (L1) connected to the first voltage line, a second voltage terminal (L2) connected to the second voltage line, and a ground terminal (PE) connected to the neutral line. The second socket has a voltage terminal (L1) connected to the first voltage line and a ground terminal (PE) connected to the neutral line.

Description

Invention Field

[0001] This disclosure relates to a discharge assembly, a power supply system, and a power supply method having a discharge connector capable of being connected to a discharge port. Background Technology

[0002] For example, Japanese Patent No. 5099281 discloses a connector structure for extracting electricity stored in an energy storage device mounted in a vehicle to the outside of the vehicle. Summary of the Invention

[0003] In the connector configuration described above, a single power source is extracted from the discharge port (e.g., the socket). Therefore, it is difficult to drive multiple electrical devices with different drive voltages using the extracted power.

[0004] To address the aforementioned issues, it was also considered to set up two or more discharge ports, each outputting a different voltage. However, this approach necessitates the use of more than two discharge ports, requiring significant design changes.

[0005] This disclosure was made to solve the above-mentioned problems, and its purpose is to provide a discharge component, power supply system, and power supply method capable of suppressing various AC power sources with different output voltages due to design changes.

[0006] The discharge assembly according to the first aspect of this disclosure has a discharge connector configured to connect to a discharge port. The discharge assembly includes: a first end for receiving power from the connected discharge port; a first voltage line, a second voltage line, and a neutral line; and a second end for outputting first AC power and second AC power. The discharge connector has the first end of the discharge assembly. The first AC power applies a first voltage between the first voltage line and the neutral line. The second AC power applies a second voltage between the second voltage line and the neutral line. The second end of the discharge assembly includes a first socket and a second socket. The first socket has a first voltage terminal connected to the first voltage line, a second voltage terminal connected to the second voltage line, and a ground terminal connected to the neutral line. The second socket has a voltage terminal connected to the first voltage line and a ground terminal connected to the neutral line.

[0007] In the aforementioned discharge assembly, the second end of the discharge assembly outputs a first AC power and a second AC power. Through the three-wire structure of the first voltage line, the second voltage line, and the neutral line, the voltage applied between the first and second voltage lines in the first socket becomes the sum of the first and second voltages, while the voltage applied between the first voltage line and the neutral line in the second socket becomes the first voltage. Thus, AC power with different voltages is output to the first and second sockets. According to the aforementioned discharge assembly, multiple AC power outputs with different voltages can be achieved while suppressing design changes. Furthermore, the first voltage and the second voltage can be either the same voltage or different voltages.

[0008] The first voltage line, second voltage line, and neutral line can also be provided from the first end to the second end. The first AC power and second AC power can also be input from the discharge port to the first end of the discharge assembly, and then transmitted to the second end of the discharge assembly via the first voltage line, second voltage line, and neutral line. With this structure, the second end of the discharge assembly can easily output the first AC power and the second AC power.

[0009] The vehicle may also be equipped with the aforementioned discharge port. The vehicle may also further include an energy storage device, a first power conversion circuit, and a second power conversion circuit. Each of the first and second power conversion circuits may be configured to receive DC power from the energy storage device and output AC power to the discharge port. The discharge port may also have a first output terminal, a second output terminal, and a ground terminal grounded to the vehicle body. A first AC power may be output from the energy storage device via the first power conversion circuit between the first output terminal and the ground terminal in the discharge port. A second AC power may also be output from the energy storage device via the second power conversion circuit between the second output terminal and the ground terminal in the discharge port. The first end of the discharge assembly may also include a first input terminal connected to a first voltage line, a second input terminal connected to a second voltage line, and a ground terminal connected to a neutral line. With the discharge connector and the discharge port connected, the first input terminal, the second input terminal, and the ground terminal of the first end may be connected to the first output terminal, the second output terminal, and the ground terminal of the discharge port, respectively.

[0010] According to the above structure, in the vehicle, the first AC power and the second AC power generated by the first power conversion circuit and the second power conversion circuit are input from the vehicle's discharge port to the first end (discharge connector) of the discharge assembly. By using two power conversion circuits to generate the voltage applied between the first voltage line and the second voltage line, the load on one power conversion circuit is reduced. The power conversion circuit can also be configured to convert DC power output from the energy storage device into AC power. The power conversion circuit can also be configured to convert at least one of voltage and frequency. The power conversion circuit can also be an inverter.

[0011] The discharge assembly may also include a conversion device that transforms the two wires connected to the first end into three wires: a first voltage line, a second voltage line, and a neutral line. The first end and the conversion device may also be electrically connected via the aforementioned two wires (e.g., two voltage lines). The conversion device and the second end may also be electrically connected via the aforementioned three wires (the first voltage line, the second voltage line, and the neutral line). According to such a discharge assembly, AC power can be received from the discharge port in a single-phase two-wire configuration and AC power can be output to the second end (including the socket) in a single-phase three-wire configuration.

[0012] The second end may also include a third socket. The third socket may also have a voltage terminal connected to the second voltage line and a ground terminal connected to the neutral line.

[0013] Based on the above structure, AC power can be output to each of the first to third sockets. The voltage applied between the second voltage line and the neutral line in the third socket is called the second voltage.

[0014] Both the first and second voltages can be between 95V and 150V. With this structure, the first socket can be used as a power supply for electrical equipment with a drive voltage of around 200V single-phase AC, and the second (or third) socket can be used as a power supply for electrical equipment with a drive voltage of around 100V single-phase AC. The voltage applied between the first and second voltage lines in the first socket can also be twice the voltage applied between the first voltage line and the neutral line in the second socket.

[0015] The first end of the discharge assembly may also have a detection terminal that outputs a connector signal representing the required voltage value of the discharge connector that is electrically connected to the discharge port.

[0016] According to the above structure, the discharge body (e.g., a vehicle) with a discharge port can easily apply a voltage corresponding to the discharge connector (i.e., the voltage required by the discharge connector) to the discharge connector.

[0017] The connector signal can also be a potential signal that, in addition to indicating the required voltage value, also indicates the state of the discharge connector and the discharge port. The discharge connector may also include a detection circuit that changes the potential of the detection terminal based on the state of the discharge connector and the discharge port.

[0018] According to the above structure, the discharge body (e.g., a vehicle) with a discharge port can easily identify the status of the discharge connector and the discharge port (e.g., whether it is connected or not), and can easily supply power to the discharge connector at a suitable time.

[0019] The neutral line can also be electrically connected to the detection terminal via a detection circuit. The states determined by the connector signal can include an unfitted state, a fitted state, and a connected state. An unfitted state can also be a state where the discharge connector and discharge port are not electrically connected. A fitted state can also be a state where the discharge connector and discharge port are electrically connected, and the discharge connector is not locked. A connected state can also be a state where the discharge connector and discharge port are electrically connected, and the discharge connector is locked. The detection circuit can also include a switch linked to the latch of the discharge connector and an electrical resistor connected in parallel with the switch.

[0020] According to the above structure, the potential of the detection terminal changes depending on whether there is an electrical connection between the discharge port and the first end (input terminal) of the discharge assembly. Furthermore, the potential of the detection terminal changes depending on whether the discharge connector is locked. Therefore, by detecting the potential of the detection terminal, the unengaged state, the engaged state, and the connected state can be easily and appropriately determined.

[0021] In any of the above-mentioned discharge components, the discharge connector may also have a second end in addition to the first end.

[0022] In the above structure, the discharge connector has a second end (including a first socket and a second socket). This structure facilitates miniaturization of the discharge assembly. The discharge connector itself can also function as a discharge assembly.

[0023] Alternatively, any of the above-mentioned discharge components may also include: a housing containing circuitry electrically connected to the discharge connector; and a cable connecting the discharge connector and the housing. Furthermore, the housing may also have a second end.

[0024] In the above structure, the discharge connector with the first end and the housing with the second end are connected via a cable, making it easy to configure the input end (first end) of the discharge component that can be connected to the discharge port and the output end (second end) of the discharge component, including the first socket and the second socket, to separate positions. Therefore, the degree of freedom in the configuration related to the first socket and the second socket is increased. Furthermore, a portion of the discharge circuit can be housed within the housing, making it easy to miniaturize the discharge connector.

[0025] The power supply system disclosed in the second aspect includes: a vehicle having a discharge port; and a discharge assembly configured to connect to the discharge port. The discharge assembly includes: a first end for receiving power from the connected discharge port; a first voltage line, a second voltage line, and a neutral line; and a second end for outputting first AC power and second AC power. The first AC power applies a first voltage between the first voltage line and the neutral line. The second AC power applies a second voltage between the second voltage line and the neutral line. The second end includes a first socket and a second socket. The first socket has a first voltage terminal connected to the first voltage line, a second voltage terminal connected to the second voltage line, and a ground terminal connected to the neutral line. The second socket has a voltage terminal connected to the first voltage line and a ground terminal connected to the neutral line. The vehicle also includes an energy storage device and a power conversion circuit. The power conversion circuit is configured to receive power from the energy storage device and output power to the discharge port.

[0026] The power supply system described above, similar to the discharge components described above, can output various AC power sources with different voltages from the first and second sockets while suppressing design changes.

[0027] Vehicles can also be electric vehicles (hereinafter referred to as "xEVs"). xEVs are vehicles that use electricity as a power source, either entirely or partially. xEVs include BEVs (battery electric vehicles), PHEVs (plug-in hybrid electric vehicles), and FCEVs (fuel cell electric vehicles).

[0028] The power supply method according to the third aspect of this disclosure includes: obtaining the required voltage value of the discharge connector connected to the discharge port; determining whether the discharge connector connected to the discharge port is a single-phase 3-wire connector having a first voltage line, a second voltage line, and a neutral line; and, if the discharge connector connected to the discharge port is a single-phase 3-wire connector, applying an AC voltage between the first voltage line and the neutral line and between the second voltage line and the neutral line respectively, such that the first socket connected to the first voltage line, the second voltage line, and the neutral line outputs an AC voltage equivalent to the required voltage value, and the second socket connected to the first voltage line and the neutral line outputs an AC voltage equivalent to half of the required voltage value.

[0029] Using the above method, similar to the above discharge assembly, it is possible to output various AC power with different voltages from the first and second sockets while suppressing design changes.

[0030] In the above judgment, if the required voltage value is within a predetermined range, it can be determined that the discharge connector connected to the discharge port is a single-phase 3-wire connector. Alternatively, if the required voltage value is outside the predetermined range, it can be determined that the discharge connector connected to the discharge port is not a single-phase 3-wire connector.

[0031] Based on the above structure, it is easy to determine whether the discharge connector connected to the discharge port is a single-phase 3-wire connector based on the required voltage value of the discharge connector. The aforementioned predetermined range can also be a predetermined voltage value (a specific value). For example, it can be determined that the discharge connector connected to the discharge port is a single-phase 3-wire connector when the required voltage value is 200V.

[0032] The above and other objects, features, aspects and advantages of the invention will become more apparent from the following detailed description of the invention as understood in conjunction with the accompanying drawings. Attached Figure Description

[0033] Figure 1 This is an overall structural diagram of the power supply system involved in the embodiments of this disclosure.

[0034] Figure 2 It is shown Figure 1 A diagram showing the structure surrounding the charging and discharging device.

[0035] Figure 3 It is shown Figure 2 The diagram shows an example of the circuit structure of an on-board inverter.

[0036] Figure 4 It is shown Figure 2 The diagram shows an example of the circuit structure of a vehicle charger.

[0037] Figure 5 It is shown Figure 1 The diagram shows the appearance of the discharge connector with the cover open.

[0038] Figure 6 It is shown Figure 1 The diagram shows the appearance of the discharge connector with the cover closed.

[0039] Figure 7 It is shown Figure 1 The diagram shows a schematic circuit structure of the 200V connector and vehicle socket.

[0040] Figure 8 It is shown Figure 1 The diagram shows a 200V connector and the connection pattern of a single-phase 3-wire wiring in a vehicle.

[0041] Figure 9 It is shown Figure 1 The timing diagram shows the start (discharge start) and stop (discharge stop) sequence of the 200V connector.

[0042] Figure 10 It is used for explanation Figure 1 The diagram shows a 100V connector that can be connected to a vehicle's socket.

[0043] Figure 11 It is shown Figure 10 A schematic diagram of the circuit structure of the 100V connector is shown.

[0044] Figure 12 It is shown Figure 10 The timing diagram shows the start (discharge start) and stop (discharge stop) sequence of the 100V connector.

[0045] Figure 13 This is a diagram used to illustrate PISW signals (connector signals).

[0046] Figure 14 This is a flowchart illustrating a power supply method according to an embodiment of the present disclosure.

[0047] Figure 15 It is shown Figure 8 A diagram showing a variation of the structure.

[0048] Figure 16 It is shown Figure 5 as well as Figure 6 A diagram showing a modified example of the discharge assembly (discharge connector).

[0049] Figure 17 It is shown Figure 16 The diagram shows the internal structure of the socket box. Detailed Implementation

[0050] Embodiments of this disclosure will be described in detail with reference to the accompanying drawings. Furthermore, the same or equivalent parts will be referred to by the same reference numerals in the drawings without repeated descriptions. Hereinafter, the Electronic Control Unit (ECU) will be referred to as "ECU". Additionally, alternating current (AC) is sometimes referred to as "AC", and direct current (DC) as "DC".

[0051] Figure 1 This is an overall structural diagram of the power supply system involved in this implementation method. (Refer to...) Figure 1 This embodiment applies the power supply system to Vehicle-to-Load (V2L) systems, where electrical equipment is directly powered from a vehicle. In V2L, power is supplied directly to electrical equipment separately from the power system via a power converter (e.g., an on-board inverter) designed for use in vehicles and not fixed to the ground. The power system is a distribution network system (commercial power system) used to supply power from power operators to power users. The on-board inverter is a device built into the vehicle that converts the DC power from the vehicle's battery for driving into AC power and supplies AC power to electrical equipment.

[0052] Specifically, the power supply system involved in this embodiment is configured to include a discharge connector 100 and a vehicle 200, and power supplied from the vehicle 200 is supplied to the electrical load 300 via the discharge connector 100. In this embodiment, the discharge connector 100 includes a first end P1 (input end) and a second end P2 (output end), and functions as a discharge component. The vehicle 200 can be any vehicle with discharge capabilities, but in this embodiment, a battery electric vehicle (BEV) without an engine (internal combustion engine) is used as the vehicle 200.

[0053] The electrical load 300 includes an electrical device 310 (device body) and a power cable 320 connected to the electrical device 310. The electrical device 310 is driven when it receives a predetermined supply of AC power via the power cable 320. The discharge connector 100 includes a socket to which the plug 321 of the power cable 320 can be connected. Details of the socket included in the discharge connector 100 will be described later (see [reference]). Figure 5 as well as Figure 8 ).

[0054] Vehicle 200 includes a connector 210 (vehicle connector), a charging / discharging device 220, a battery 230, and an ECU 250. The connector 210 and battery 230 correspond to an example of the "discharge port" and "energy storage device" disclosed herein. The connector 210 corresponds to a portion fixed within vehicle 200 in a discharge connection system. Battery 230 includes, for example, a secondary battery. Examples of secondary batteries include lithium-ion batteries or nickel-metal hydride batteries. Battery 230 may also include one or more energy storage devices selected from a group consisting of liquid-cooled secondary batteries, all-solid-state secondary batteries, battery packs, and electrical double-layer capacitors. Vehicle 200 is configured to operate using the power stored in battery 230. Vehicle 200 includes an electric motor (not shown) that receives power from battery 230 and operates by the power generated by the electric motor.

[0055] The charging and discharging device 220 is configured to charge the battery 230. Specifically, the charging and discharging device 220 is configured to convert AC power supplied from outside the vehicle to the socket 210 into DC power and output the DC power to the battery 230. Additionally, the charging and discharging device 220 is configured to discharge the power from the battery 230 to outside the vehicle. Specifically, the charging and discharging device 220 is configured to convert DC power supplied from the battery 230 into AC power and output the AC power to the socket 210.

[0056] Figure 2 This is a diagram showing the structure surrounding the charging / discharging device 220. (Refer to...) Figure 2An SMR (System Main Relay) 231 is provided between the charging / discharging device 220 and the battery 230. The SMR 231 is configured to switch the connection / disconnection of the circuit connecting the charging / discharging device 220 and the battery 230. When power is being transferred between the socket 210 and the battery 230, the SMR 231 is closed (connected) via the ECU 250. A BMS (Battery Management System) 232 is provided in the battery 230. The BMS 232 includes various sensors that detect the state of the battery 230 and outputs the detection results to the ECU 250. The ECU 250 can obtain the state of the battery 230 (e.g., temperature, current, voltage, SOC (State of Charge), and internal resistance) based on the output of the BMS 232.

[0057] A socket 210 is disposed at an opening 211 provided in the vehicle body. A cover 212 is provided to open and close the opening 211. The cover 212 is configured to be connected to the vehicle body via an opening / closing mechanism 213 (e.g., a hinge) to open and close the opening 211. The socket 210 is used when the cover 212 is open. When the cover 212 is closed, the cover 212 covers the opening 211 (including the socket 210), thereby preventing the use of the socket 210. The socket 210 involved in this embodiment is an AC socket. That is, when charging the battery 230 using the socket 210, AC power is input to the socket 210 from outside the vehicle.

[0058] ECU 250 is configured as a control charging and discharging device 220. ECU 250 can also be a computer. ECU 250 includes a processor 251, RAM (Random Access Memory) 252, a storage device 253, and a timer 254. In this embodiment, various controls in the vehicle 200 are executed by the processor 251 in ECU 250 executing a program stored in the storage device 253. However, the various controls in the vehicle 200 are not limited to being executed by software, but can also be executed by dedicated hardware (electronic circuitry). Furthermore, the number of processors in ECU 250 is arbitrary, and a processor can be prepared for each predetermined control.

[0059] The charging / discharging device 220 includes AC inverters 221A and 221B, and a charger 222 connected in parallel between the socket 210 and the battery 230. AC inverters 221A and 221B can be housed in different enclosures or together in the same enclosure. AC inverters 221A and 221B correspond to an example of each of the "first power conversion circuit" and "second power conversion circuit" disclosed herein.

[0060] A discharge relay 223A is provided between the AC inverter 221A and the socket 210. The discharge relay 223A is configured to switch the connection / disconnection of the discharge path from the AC inverter 221A to the socket 210. Additionally, a discharge relay 223B is provided between the AC inverter 221B and the socket 210. The discharge relay 223B is configured to switch the connection / disconnection of the discharge path from the AC inverter 221B to the socket 210. Hereinafter, without distinction, both AC inverters 221A and 221B will be referred to as "AC inverter 221".

[0061] Figure 3 This is a diagram showing an example of the circuit structure of an AC inverter 221. (Compared to...) Figure 2 Refer to together Figure 3 The AC inverter 221 includes inverters 11-13 and an insulation circuit 14. Each of inverters 11-13 includes a full-bridge circuit containing four switching elements. Inverter 13, located closest to socket 210, also includes two reactors and a smoothing capacitor. The switching elements included in inverters 11-13 are controlled by ECU 250. The insulation circuit 14 is an insulation transformer including a first coil 14a and a second coil 14b.

[0062] Inverter 11 converts the DC power input from the battery 230 side into high-frequency AC power. The insulation circuit 14 transforms the output (AC power) of inverter 11 at a ratio corresponding to the coil turns ratio and transmits it to inverter 12. Inverter 12 rectifies the AC power received from the insulation circuit 14 and outputs it to inverter 13. Inverter 13 converts the DC power received from inverter 12 into AC power of a predetermined frequency and outputs it to the socket 210 side.

[0063] As described above, the AC inverter 221 is configured to convert the DC power input from the battery 230 side into AC power of a predetermined frequency and output it to the socket 210 side. Furthermore, Figure 3The circuit structure shown is an example and can be modified as appropriate. Any circuit structure can also be used from known vehicle inverters. The AC inverter 221 can be configured to convert power bidirectionally between the battery 230 and the socket 210, or it can be configured to convert power only in one direction (from the battery 230 to the socket 210).

[0064] Refer again Figure 2 Monitoring units 224A and 224B are respectively provided in AC inverters 221A and 221B. Monitoring units 224A and 224B include various sensors that detect the status (e.g., voltage, current, and temperature) of AC inverters 221A and 221B, and output the detection results to ECU 250. ECU 250 controls AC inverters 221A and 221B based on the outputs of monitoring units 224A and 224B. This adjusts the power output from each inverter to socket 210 (i.e., the discharge power of charging / discharging device 220). ECU 250 can also be configured to monitor the current of each AC inverter 221A and 221B, and perform current limiting on inverters whose current appears to exceed a predetermined allowable current value (e.g., 15A). Details of the wiring between each inverter and socket 210 will be described later (see [reference]). Figure 8 ).

[0065] ECU250 can disconnect AC inverters 221A and 221B from socket 210 by turning discharge relays 223A and 223B into the off state. In this embodiment, a discharge relay is provided for each inverter. Therefore, each inverter can be disconnected from socket 210 individually. When a discharge relay is in the off state, discharge from the inverter corresponding to that discharge relay to socket 210 is prohibited. Furthermore, the number of discharge relays is arbitrary. The discharge relays can also be configured to disconnect multiple inverters from the socket collectively.

[0066] Each of the AC inverters 221A and 221B can be configured to output AC power at a frequency set initially (e.g., at the factory), adjusting the frequency of the AC power. Alternatively, the ECU 250 can control the AC inverters 221A and 221B based on the location of the vehicle 200, outputting AC power at a frequency suitable for each region from each inverter. The ECU 250 can also be configured to allow the user to set any frequency.

[0067] A charging relay 223C is provided between the charger 222 and the battery 230 (more specifically, closer to the charger 222 side than the SMR 231). The charging relay 223C is configured to switch the connection / disconnection of the charging path from the charger 222 to the battery 230. When the charging relay 223C is in the off state, power supply to the battery 230 from the socket 210 via the charger 222 is prohibited.

[0068] Figure 4 This is a diagram showing an example of the circuit structure of charger 222. (and...) Figure 2 Refer to together Figure 4 The charger 222 includes inverters 21-23 and an insulation circuit 24. Each of inverters 21-23 includes a full-bridge circuit containing four switching elements. Inverter 21, located closest to the socket 210, also includes a filter circuit 21a and a smoothing capacitor 21b. The filter circuit 21a removes high-frequency noise contained in the AC power. The switching elements included in inverters 21-23 are controlled by ECU 250. The insulation circuit 24 is an insulation transformer including a first coil 24a and a second coil 24b.

[0069] Inverter 21 rectifies the AC power input from the socket 210 side and outputs it to inverter 22. Inverter 22 converts the DC power received from inverter 21 into high-frequency AC power. The insulation circuit 24 transforms the output (AC power) of inverter 22 at a ratio corresponding to the coil turns ratio and transmits it to inverter 23. Inverter 23 rectifies the AC power received from insulation circuit 24 and outputs it to the battery 230 side.

[0070] As described above, the charger 222 is configured to convert AC power input from the socket 210 side into DC power and output it to the battery 230 side. Furthermore, Figure 4 The circuit structure shown is an example and can be modified appropriately. The charger 222 can be configured to convert power bidirectionally between the battery 230 and the socket 210, or it can be configured to convert power only in one direction (from the socket 210 to the battery 230). The bidirectional power conversion charger 222 can be used as a power conversion circuit for discharging. Therefore, in the configuration where the charger 222 is bidirectionally power conversion, one of the AC inverters 221A and 221B can be omitted, and the charger 222 can be used instead.

[0071] Refer again Figure 2A monitoring unit 224C is provided in the charger 222. The monitoring unit 224C includes various sensors that detect the status of the charger 222 (e.g., voltage, current, and temperature) and outputs the detection results to the ECU 250. The ECU 250 controls the charger 222 based on the output of the monitoring unit 224C. As a result, the power output from the charger 222 to the battery 230 (i.e., the charging power of the battery 230) is adjusted.

[0072] Figure 1 The discharge connector 100 shown corresponds to the part of the discharge connection system that connects to the socket 210. Hereinafter, it will be used... Figure 5 as well as Figure 6 This describes the structure of the discharge connector 100. Figure 5 This is a diagram showing the appearance of the discharge connector 100 with the cover 120 open. Figure 6 This is a diagram showing the appearance of the discharge connector 100 with the cover 120 closed.

[0073] Reference Figure 5 as well as Figure 6 The discharge connector 100 has a first end P1 and a second end P2. The first end P1 and the second end P2 are located at both ends of the body portion 110 of the discharge connector 100. The first end P1 is configured to connect to a socket 210 of the vehicle 200. The second end P2 includes a first socket To1, a second socket To2, and a third socket To3.

[0074] The discharge connector 100 also includes a cover 120 configured to open and close the second end P2. The cover 120 is rotatably mounted on the body 110 of the discharge connector 100. Specifically, the cover 120 is mounted to the body 110 via a rotating mechanism 121 (e.g., a hinge). The cover 120 covers the second end P2 in the closed state and exposes the second end P2 in the open state. Within the cover 120, a mechanism is provided for allowing cables (e.g.,...) to... Figure 1 The power cable 320 shown passes through a hole 122. Hole 122 includes a central hole and a plurality of slits extending radially from the central hole. Hole 122 accommodates multiple cables. By inserting three cables into hole 122, the cover 120 can be closed even when each cable is plugged into each of the first to third sockets To1 to To3. In the closed state (refer to...) Figure 6Under these conditions, the first to third sockets To1 to To3 are protected from rain and wind. The cover 120 is waterproof. Waterproofing treatment can also be applied to both the main body 110 and the cover 120. A sealing member can also be provided at the point where the cover 120 contacts the main body 110 when the cover 120 is closed. The rain protection structure for the first to third sockets To1 to To3 can also be the structure specified in section 6.12 of standard "JIS C8303:2007".

[0075] like Figure 6 As shown, the first end P1 has a connector terminal on the end face F1. The end face F1 of the first end P1 of the discharge connector 100 corresponds to the socket 210 of the vehicle 200. Figure 2 The connecting surface (connecting surface). The connector terminals located on end face F1 include terminal L1, terminal L2, terminal PE, terminal CS, and terminal CP.

[0076] Terminals L1 and L2 correspond to two terminals for inputting AC power from vehicle 200. Terminal L1 is the HOT side terminal, and terminal L2 is the COLD side terminal. Terminals L1 and L2 in end face F1 correspond to an example of the "first input terminal" and "second input terminal" as disclosed herein. Hereinafter, terminal L1 will also be referred to as "AC1", and terminal L2 will also be referred to as "AC2". Terminal PE corresponds to the ground terminal (hereinafter also referred to as "GND"). Terminal CS corresponds to the terminal for detection of the status (connection status / fitting status / unfitting status) of discharge connector 100 and socket 210 (hereinafter also referred to as "PISW"). Hereinafter, the status of discharge connector 100 and socket 210 will also be referred to as "connector status". Terminal CS outputs a potential signal (hereinafter also referred to as "PISW signal") indicating the connector status to vehicle 200. Terminal CS and PISW signal correspond to an example of the "detection terminal" and "connector signal" as disclosed herein. Terminal CP is equivalent to, for example, the terminal for the CPLT (Control Pilot) signal (hereinafter also referred to as "CPLT") defined in specification "IEC / TS 62763:2013". The CPLT signal is a PWM (Pulse Width Modulation) signal used in communication between vehicle 200 and discharge connector 100.

[0077] The socket 210 has terminals corresponding to the aforementioned terminals (terminals L1, L2, PE, CS, CP) of the discharge connector 100. Hereinafter, for clarity, the terminals of the socket 210 corresponding to terminals L1, L2, PE, CS, and CP of the discharge connector 100 will also be referred to as AC1, AC2, GND, PISW, and CPLT. When the discharge connector 100 and the socket 210 are engaged, AC1, AC2, GND, PISW, and CPLT located at the first end P1 of the discharge connector 100 are electrically connected to AC1, AC2, GND, PISW, and CPLT of the socket 210, respectively. The terminals of the discharge connector 100 and the engagement configuration with the socket 210 can also conform to, for example, Type 1 as specified in specification "IEC 62196-2:2011".

[0078] The discharge connector 100 also includes a latch release button 111, a discharge start switch 112, and a latch 130.

[0079] The latch release button 111 has the function of releasing the latch on the discharge connector 100 to the socket 210, or enabling the vehicle 200 (e.g., ECU 250) to detect the connector status (connected / engaged / unengaged). The latch 130 is configured to engage with the socket 210 to secure (lock) the discharge connector 100 to the socket 210. For example, the discharge connector 100 is locked by engaging the front end of the latch 130 with a recess formed in the socket 210. The latch 130 is linked to the latch release button 111. When the user presses the latch release button 111, the latch is released.

[0080] When the user inserts the discharge connector 100 into the socket 210 without pressing the latch release button 111, thus engaging the discharge connector 100 and the socket 210, the connector is secured by the latch 130 while the discharge connector 100 and the socket 210 are electrically connected. This connector state is the "connected state". In the connected state, the discharge connector 100 is inserted into the socket 210, all terminals of both are electrically connected, and the discharge connector 100 is locked. When the user presses the latch release button 111 in the connected state, the locking by the latch 130 is released. This connector state is the "engaged state". In the engaged state, the discharge connector 100 is inserted into the socket 210, all terminals of both are electrically connected, but the discharge connector 100 is not locked. When the user removes the discharge connector 100 from the socket 210 in the engaged state, the connector state becomes the "unengaged state". The unengaged state is a state that is neither connected nor engaged. When the connector is in a connected or engaged state, the ECU250 prevents the vehicle 200 from driving.

[0081] The discharge start switch 112 has the function of causing the vehicle 200 (e.g., ECU 250) to detect the start of discharge by changing the PISW signal (signal at terminal CS). In this embodiment, the PISW signal is a potential signal. Details of the PISW signal will be described later (see [reference]). Figure 13 ).

[0082] Connect using single-phase 3-wire wiring L10. Figure 1 The discharge connector 100 shown has a first end P1 and a second end P2. The single-phase 3-wire wiring L10 includes a voltage line L11, a voltage line L12, and a neutral line L13. Voltage lines L11, L12, and L13 correspond to an example of the "first voltage line," "second voltage line," and "neutral line" as described in this disclosure, respectively. Voltage lines L11, L12, and neutral line L13 extend from the first end P1 to the second end P2, connecting the first end P1 and the second end P2. The second end P2 is configured to output AC100V and AC200V power via voltage lines L11, L12, and neutral line L13. The connection pattern of the single-phase 3-wire wiring L10 and the first to third sockets To1 to To3 will be described later (see reference). Figure 8 ).

[0083] Figure 7 This is a diagram showing a schematic circuit structure of the discharge connector 100 and the socket 210. Figure 2 as well as Figure 6 Refer to together Figure 7 In the discharge connector 100, voltage lines L11, L12, and neutral line L13 are connected to AC1, AC2, and GND of the first end P1, respectively. The single-phase three-wire wiring L10 of the discharge connector 100 (i.e., voltage lines L11, L12, and neutral line L13) is connected to the single-phase three-wire wiring L20 of the vehicle 200 (i.e., voltage lines L21, L22, and neutral line L23) via AC1, AC2, and GND. In the vehicle 200, voltage lines L21, L22, and neutral line L23 are connected to AC1, AC2, and GND of the socket 210, respectively. AC1 and AC2 of the socket 210 correspond to an example of the "first output terminal" and "second output terminal" as described in this disclosure. In the vehicle 200, the power supply is connected from the on-board inverter (e.g., Figure 2 The AC inverters 221A and 221B shown supply AC power to voltage lines L21 and L22. Furthermore, the AC power supplied from the vehicle inverter to voltage lines L21 and L22 is transferred to voltage lines L11 and L12 via AC1 and AC2. Additionally, in vehicle 200, the GND of socket 210 is grounded to the vehicle body (vehicle grounding) via neutral line L23. Furthermore, in... Figure 7 Only one socket is shown in the image, but the discharge connector 100 has three sockets. Figure 5 The first to third sockets (To1 to To3) are shown.

[0084] Figure 8 This diagram illustrates the connection pattern of the discharge connector 100 and the single-phase 3-wire wiring L10 and L20 in the vehicle 200. Figure 2 , Figure 5 as well as Figure 7 Refer to together Figure 8 AC1 and GND of socket 210 are connected to AC inverter 221A via voltage line L21 and neutral line L23, respectively. AC2 and GND of socket 210 are connected to AC inverter 221B via voltage line L22 and neutral line L23, respectively. GND of socket 210 is grounded to the vehicle body of vehicle 200 (vehicle body grounding) via neutral line L23.

[0085] The AC inverters 221A and 221B are each configured to start from battery 230 ( Figure 2 It receives DC power and outputs AC power to the socket 210 side. Between AC1 and GND in the socket 210, the first AC power is output from the battery 230 via the AC inverter 221A. Between AC2 and GND in the socket 210, the second AC power is output from the battery 230 via the AC inverter 221B.

[0086] Power (e.g., the first AC power and the second AC power described above) is input to the first end P1 of the discharge connector 100 from the socket 210 connected to the first end P1. The first AC power and the second AC power are input from the socket 210 to the first end P1 and transmitted to the second end P2 via voltage lines L11, L12 and neutral line L13. The second end P2 outputs the first AC power and the second AC power to the first to third sockets To1 to To3 via voltage lines L11, L12 and neutral line L13. In this embodiment, the first AC power applies an AC 100V voltage between voltage line L11 and neutral line L13, and the second AC power applies an AC 100V voltage between voltage line L12 and neutral line L13. Regarding the discharge connector 100, the socket terminals electrically connected to voltage lines L11, L12 and neutral line L13 are respectively referred to as "L1", "L2" and "PE".

[0087] As in Figure 8As shown, socket To1 has L1 (first voltage terminal), L2 (second voltage terminal), and PE (ground terminal). Socket To2 has one L1 (voltage terminal) and two PE (ground terminals). Socket To3 has one L2 (voltage terminal) and two PE (ground terminals). Socket To1 outputs AC200V between L1 and L2. Socket To2 outputs AC100V between L1 and PE. Socket To3 outputs AC100V between L2 and PE. Socket To1 can also be a single-phase AC200V socket with a rated voltage of 250V and a rated current of 20A. Sockets To2 and To3 can each be a single-phase AC100V socket with a rated voltage of 125V and a rated current of 15A.

[0088] As described above, AC100V / AC200V can be output via a single-phase 3-wire wiring L10. For example, if Figure 1 The electrical device 310 shown is driven by AC 200V, so by connecting the power cable 320 to the first socket To1, the electrical device 310 can be driven. If Figure 1 The electrical device 310 shown is driven by AC 100V. Therefore, by connecting the power cable 320 to the second socket To2 or the third socket To3, the electrical device 310 can be driven. Furthermore, by using multiple sockets simultaneously, various electrical devices with different drive voltages can be driven.

[0089] Again with Figure 2 as well as Figure 6 Refer to together Figure 7 In vehicle 200, a reference voltage is applied between the vehicle body (ground wire) and signal line L24, which is connected to PISW. Furthermore, the PISW signal (PISW potential) is input to ECU 250 via signal line L24. When the first end P1 of discharge connector 100 is electrically connected to socket 210, a closed circuit (closed system) is formed by connecting PISW and GND via the circuit of discharge connector 100 (including detection circuit 140 described later). This causes a change in the PISW potential. Even if discharge connector 100 has no power supply, a PISW signal is generated through the aforementioned closed circuit. ECU 250 can determine the connector status based on the PISW signal (PISW potential).

[0090] In the discharge connector 100, the signal line L14 connected to the PISW is connected to the neutral line L13 via a detection circuit 140. The detection circuit 140 is a probability detection circuit used to determine whether the discharge connector 100 is in a connected state, a mated state, or an unmatted state. The detection circuit 140 includes electrical resistors R1, R2, and R3, and switches S1 and S2. The signal line L14 branches from the PISW through the electrical resistor R1 into two branches, L141 and L142, which merge and connect to the neutral line L13. Electrical resistor R2 is configured in branch L141, and electrical resistor R3 and switch S1 are configured in branch L142. Electrical resistors R2 and R3 are configured in parallel. Electrical resistor R3 and switch S1 are configured in series. Additionally, switch S2 is configured in parallel with electrical resistor R3.

[0091] Switches S1 and S2 are respectively connected to the latch release button 111 and the discharge start switch 112 of the discharge connector 100. Figure 5 as well as Figure 6 The switches S1 and S2 are linked and open / closed. Switch S1 is closed (conducting) when the latch release button 111 is not pressed, and open (disconnected) when the latch release button 111 is pressed. Switch S2 is closed (conducting) when the discharge start switch 112 is OFF, and open (disconnected) when the discharge start switch 112 is ON. In this embodiment, the discharge start switch 112 is ON while the user presses it, and OFF when the user releases it. Both switches S1 and S2 are closed when the user does not operate either the latch release button 111 or the discharge start switch 112. That is, each of switches S1 and S2 is equivalent to a normally closed switch.

[0092] When switches S1 and S2 are in the open state, the resistance value (combined resistance) of the detection circuit 140 increases compared to when switches S1 and S2 are in the closed state, and the potential of PISW also increases accordingly. ECU 250 can determine the state of switches S1 and S2 (and thus the state of latch release button 111 and discharge start switch 112) based on the PISW signal (PISW potential).

[0093] exist Figure 5 as well as Figure 6In the discharge connector 100 shown, the latch release button 111 functions as a switch to stop discharge from the vehicle 200, and the discharge start switch 112 functions as a switch to start discharge from the vehicle 200. If the user performs a predetermined operation on the discharge start switch 112 while the connector is in the connected state, the vehicle 200 (ECU 250) recognizes the start of discharge and begins discharging. In this embodiment, discharge is started by the user turning the discharge start switch 112 ON twice. When the latch release button 111 is pressed during discharge, and the connector is either in the engaged or disengaged state, the vehicle 200 (ECU 250) recognizes the stop of discharge and stops discharging.

[0094] Figure 9 This is a timing diagram showing the sequence of starting (discharge initiation) and stopping (discharge stop) of the discharge connector 100. Figure 9 In the diagram, line D1 represents the potential of PISW, and line D2 represents the AC power output from socket 210 to the discharge connector 100.

[0095] and Figures 5-8 Refer to together Figure 9 When the user presses the latch release button 111 while inserting the discharge connector 100 into the socket 210, the connector state changes from an unengaged state to an engaged state, and the potential of PISW decreases. Then, when the user releases the latch release button 111, the connector state changes from an engaged state to a connected state, and the potential of PISW decreases further. After a predetermined time (e.g., 500 ms) elapses from the connector state changing to the connected state, the operation of the discharge start switch 112 becomes active. Furthermore, when the user turns the discharge start switch 112 to the ON state, the potential of PISW rises. Then, when the user returns the discharge start switch 112 to the OFF state, the potential of PISW also returns. If the user presses the latch release button 111 while the connector state is in the connected state, the PISW potential will decrease. Figure 9 The discharge start switch 112 is operated in the sequence shown, i.e., ON, OFF, ON, OFF. Then ECU250 ( Figure 2 The discharge start is detected based on the PISW potential, and discharge begins. In order to suppress malfunctions caused by noise, the discharge start switch 112 in ECU250 becomes active when the voltage corresponding to the ON / OFF operation is maintained for a predetermined time (e.g., 50ms to 3000ms).

[0096] Discharging from vehicle 200 is performed by ECU 250. Specifically, ECU 250 controls charging and discharging device 220 to output the aforementioned first AC power and second AC power from socket 210 to the discharge connector 100 side. Figure 2 Additionally, during discharge, SMR231 ( Figure 2The SMR231 is controlled to be in the closed state. The period Ts from the start of the discharge operation to the start of the discharge can be arbitrarily set. The ECU250 can also perform predetermined processes (such as pre-discharge checks such as wire breakage checks) during the period Ts. The SMR231 can also be switched from the open state to the closed state during the period Ts.

[0097] When the latch release button 111 is pressed during discharge, the connector state changes from the connected state to the engaged state, and the potential of PISW rises. When the connector state becomes engaged, ECU250 recognizes the discharge stop based on the PISW potential and stops the discharge. The period Te from the discharge stop operation to the discharge stop can also be the period specified in specification "IEC61851-1".

[0098] Again with Figure 2 as well as Figure 6 Refer to together Figure 7 The PISW signal (PISW potential) indicates not only the connector status and switch status mentioned above, but also the required voltage value of the discharge connector electrically connected to the socket 210. Specifically, the socket 210 is configured to connect to various discharge connectors. In this embodiment, besides... Figures 5-9 In addition to the discharge connector 100 shown, the discharge connector 100A described below can also be connected to the socket 210. The required voltage values ​​are different for discharge connector 100 and discharge connector 100A. The required voltage value for discharge connector 100 is 200V, and the required voltage value for discharge connector 100A is 100V. Hereinafter, discharge connector 100 and discharge connector 100A will be referred to as "200V connector" and "100V connector," respectively. The 200V connector involved in this embodiment is equivalent to a single-phase 3-wire connector.

[0099] Figure 10 This diagram illustrates a 100V connector. The following explanation focuses on the differences between the 100V and 200V connectors.

[0100] Reference Figure 10 The appearance of discharge connector 100A is the same as that of discharge connector 100 ( Figure 5 The components are largely the same. However, the discharge connector 100A has only one socket. The discharge connector 100A has a latch release button 111A and a discharge start switch 112A. The discharge connector 100A has a first end P1A that can be connected to the socket 210. In addition, the discharge connector 100A has a socket To4 at its second end P2A.

[0101] In the discharge connector 100A, a single-phase two-wire wiring L10A connects the first end P1A and the socket To4. The single-phase two-wire wiring L10A includes voltage lines L11A and L12A. Voltage lines L11A and L12A are connected to AC1 and AC2 of the first end P1A, respectively. In this embodiment, the ECU 250, which identifies the discharge connector 100A and the socket 210, controls the AC inverters 221A and 221B to output 100V single-phase AC power between AC1 and AC2 of the socket 210.

[0102] Single-phase AC power is input to the first end P1A of the discharge connector 100A from the socket 210 connected to the first end P1A. This single-phase AC power applies an AC 100V voltage between voltage lines L11A and L12A. Regarding the discharge connector 100A, the socket terminals electrically connected to voltage lines L11A and L12A are respectively labeled "L1" and "L2".

[0103] As in Figure 10 As shown, socket To4 has L1, L2, and a ground terminal. Socket To4 outputs 100V single-phase AC power between L1 and L2. The ground terminal of socket To4 is grounded in discharge connector 100A. The ground terminal of socket To4 can be set to the same potential as the vehicle body of vehicle 200, or it can be set to a state of insulation from the vehicle body of vehicle 200 (floating state).

[0104] Figure 11 This is a diagram showing a schematic circuit structure of a 100V connector. (Refer to...) Figure 11 With the discharge connector 100A connected to the socket 210, PISW and GND are connected via the circuit of the discharge connector 100A (including the detection circuit 140A) to form a closed circuit. In the vehicle 200, a reference voltage is applied between the vehicle body (ground wire) and PISW. Therefore, even if the discharge connector 100A has no power supply, a PISW signal is generated through the aforementioned closed circuit. Furthermore, in the discharge connector 100A, the signal line L14A connected to PISW is connected to the ground terminal of the socket To4 via the detection circuit 140A. The detection circuit 140A includes electrical resistors R1A, R2A, and R3A, and switches S1A and S2A. Switches S1A and S2A are respectively connected to the latch release button 111A and the discharge start switch 112A (see reference). Figure 10 The signal line L14A branches from PISW via electrical resistor R1A into two branches, L141A and L142A. Branches L141A and L142A merge and connect to ground line L13A. Detection circuit 140A has a basic configuration according to... Figure 7The structure of the detection circuit 140 shown is different from that of the detection circuit 140 in the following aspects.

[0105] The resistance values ​​are different in detection circuit 140 and detection circuit 140A. For example, in... Figure 7 As shown, in the detection circuit 140, the electrical resistors R1, R2, and R3 have resistance values ​​of 20Ω, 460Ω, and 20Ω, respectively. In contrast, the electrical resistors R1A, R2A, and R3A in the detection circuit 140A are as follows: Figure 11 The resistors shown are 39Ω, 430Ω, and 51Ω, respectively. The resistor values ​​in detection circuits 140 and 140A are set to match the potential diagram M2 described later. Furthermore, the electrical resistors included in detection circuits 140 and 140A are set to values ​​different from the electrical resistors in the charging connector specified in standard "IEC 61851-1:2010 Annex B". Therefore, ECU 250 can distinguish between the charging connector and the discharging connector based on the PISW signal (PISW potential).

[0106] In the detection circuit 140A, switch S1A is a normally closed switch, and switch S2A is a normally open switch. Switch S2A is closed when the discharge start switch 112A is ON, and open when the discharge start switch 112A is OFF.

[0107] Figure 12 This is a timing diagram showing the start-up (discharge start) and stop-up (discharge stop) sequence of a 100V connector. Figure 12 In the diagram, line D1A represents the potential of PISW, and line D2A represents the AC power output from socket 210 to the discharge connector 100A side.

[0108] and Figure 10 as well as Figure 11 Refer to together Figure 12 The sequence of the discharge connector 100A is... Figure 9 The sequence of the discharge connectors 100 shown is substantially the same. However, when the user turns the discharge start switch 112A to the ON state, the potential of PISW decreases. When the user turns the discharge start switch 112A back to the OFF state, the potential of PISW also returns. If the connector is in the connected state, the user follows... Figure 12 The sequence shown is ON, OFF, ON, OFF. Operate the discharge start switch 112A in this order, then ECU250 ( Figure 2 The discharge is initiated based on the potential of the PISW.

[0109] Figure 13 This is a diagram used to illustrate the PISW signal (PISW potential). (Refer to...) Figure 13The potential diagram M1 related to the PISW potential represents the judgment value for each potential range specified in charging specification "IEC 61851-1". Within the range of 0–4.7V, for potential ranges of 1.359–1.639V, 2.553–2.944V, and 4.301–4.567V, connector states such as connected, mated, and unmatted are defined as judgment values, respectively. Potential ranges outside these are undefined.

[0110] The potential diagram M2 related to the PISW potential is the control diagram used in the control and is stored in... Figure 2 The storage device 253 of the ECU 250 is shown. In the potential diagram M2, for each potential range, the connector state, switch state, and required voltage value of the discharge connector are specified. When a discharge connector is electrically connected to the socket 210, the ECU 250 can obtain the connector state, switch state, and required voltage value of the discharge connector from the PISW signal using the potential diagram M2. Furthermore, the ECU 250 can determine whether a discharge connector is electrically connected to the socket 210 based on the PISW signal.

[0111] In potential diagram M2, the potential range of 0.0–1.2V represents the potential range in which the discharge connector is in the connected state (hereinafter also referred to as the "connected range"). The potential range of 1.2–2.0V represents the potential range used during charging (charging range). The potential range of 2.0–3.5V represents the potential range in which the discharge connector is in the mated state (hereinafter also referred to as the "matted range"). The potential range of 3.5–4.7V represents the potential range in which the discharge connector is in the unmatted state (hereinafter also referred to as the "unmatted range").

[0112] In potential diagram M2, a connection range of 0.0 to 1.2V is allocated for the potential range not defined in charging specification "IEC61851-1". This allows ECU250 to easily distinguish between the charging and discharging connectors. The connection range is further divided into three potential ranges as described below (0.0 to 0.4V / 0.4 to 0.7V / 0.7 to 1.2V).

[0113] The 0.0–0.4V potential allocation indicates that the required voltage value for the discharge connector connected to socket 210 is a potential range of 200V (hereinafter also referred to as the "200V range"). A PISW potential within the 200V range means that the discharge connector connected to socket 210 is a 200V connector. The 0.7–1.2V potential allocation indicates that the required voltage value for the discharge connector connected to socket 210 is a potential range of 100V (hereinafter also referred to as the "100V range"). A PISW potential within the 100V range means that the discharge connector connected to socket 210 is a 100V connector. In a 100V connector (… Figure 11 ) and 200V connector ( Figure 7 The different resistance values ​​in the connector result in different PISW potentials when each connector is connected to socket 210. The 100V and 200V ranges indicate not only the required voltage for the discharge connector connected to socket 210, but also that the discharge start switch of that connector is in the OFF state.

[0114] The potential range of 0.4–0.7V indicates the range in which the discharge start switch is in the ON state (hereinafter also referred to as the "discharge start range"). In a 200V connector, switch S2 is linked to the discharge start switch 112. Figure 7 The PISW potential rises when the discharge start switch 112 changes from the OFF state to the ON state. In the 100V connector, the switch S2A (which is linked to the discharge start switch 112A) is... Figure 11 Since it is a normally open switch, the PISW potential decreases when the switch 112A changes from the OFF state to the ON state at the start of the discharge.

[0115] Figure 14 This is a flowchart illustrating the processes related to the initiation of discharge performed by ECU 250. The processes shown in this flowchart are repeatedly executed while the vehicle 200 is stationary (except during charging and discharging).

[0116] and Figures 1 to 13 Refer to together Figure 14 In S101, ECU250 acquires the PISW signal (PISW potential). In the following S102, ECU250 determines, based on the PISW signal, whether a discharge connector is connected to socket 210. If the connector is in a connected state, the determination in S102 is "yes," and the process proceeds to S103. In S103, ECU250 determines whether the required voltage value of the discharge connector connected to socket 210 is 100V or 200V.

[0117] ECU250 use Figure 13The potential diagram M2 shown obtains the state of socket 210 (e.g., connector state) and information about the discharge connector connected to socket 210 (e.g., switch state and required voltage value) from the PISW signal obtained in S101. ECU 250 can determine the connector state (unfitted / fitted / connected) based on whether the PISW potential belongs to the unfitted range, fitted range, or connected range. Furthermore, ECU 250 can determine whether the discharge start switch has been operated by the user based on whether the PISW potential belongs to the discharge start range. Moreover, ECU 250 can determine the required voltage value of the discharge connector (100V / 200V) based on whether the PISW potential belongs to the 100V or 200V range. A PISW potential in the 200V range means that the discharge connector connected to socket 210 is a single-phase 3-wire connector. Figures 5-9 (The 200V connector shown). When the required voltage value of the discharge connector connected to the socket 210 is 200V, the ECU250 determines that the discharge connector is a single-phase 3-wire connector.

[0118] If S103 determines that the required voltage value of the discharge connector is 200V, ECU250 determines in S111 whether the user has initiated an AC200V discharge operation. Figure 9 The discharge start switch operation is shown in the sequence of ON, OFF, ON, OFF. Then, when the user performs the AC200V discharge start operation ("Yes" in S111), the ECU250 outputs 200V single-phase AC power from the socket 210 to the 200V connector side in S112. Specifically, in Figure 8 The ECU 250 controls AC inverters 221A and 221B to output 200V single-phase AC power between AC1 and AC2 of the shown socket 210. In this embodiment, AC inverters 221A and 221B each apply an AC voltage equivalent to half the required voltage value (AC100V), thereby applying AC200V between AC1 and AC2. Thus, 200V, 100V, and 100V single-phase AC power are output to sockets To1, To2, and To3 of the 200V connector, respectively.

[0119] If S103 determines that the required voltage value of the discharge connector is 100V, ECU250 determines in S121 whether the user has initiated an AC100V discharge operation. Figure 12The discharge start switch operation is shown in the sequence of ON, OFF, ON, OFF. Furthermore, when the user performs an AC 100V discharge start operation ("Yes" in S121), the ECU 250 outputs 100V single-phase AC power from the socket 210 to the 100V connector side in S122. Specifically, in... Figure 10 The ECU 250 controls AC inverters 221A and 221B to output 100V single-phase AC power between AC1 and AC2 of the shown socket 210. In this embodiment, AC inverters 221A and 221B each apply an AC voltage equivalent to half the required voltage value (AC50V), thereby applying AC100V between AC1 and AC2. This outputs 100V single-phase AC power to socket To4 of the 100V connector. However, it is not limited to this; the ECU 250 can also apply AC100V between AC1 and AC2 using only AC inverter 221A, leaving AC inverter 221B in a voltage-free state (conduction state).

[0120] When discharge begins in S112 or S122 above Figure 14 The series of processes shown ends. The initial discharge ends when a predetermined discharge stop condition is met. When the predetermined discharge stop condition is met, the ECU 250 controls the AC inverters 221A and 221B to stop the discharge from the socket 210 to the discharge connector. As described above, the discharge stop condition is met when the connector is in an engaged or disengaged state during discharge. Furthermore, the discharge stop condition is met even when the SOC of the battery 230 is below a predetermined SOC value. However, this is not a limitation; the discharge stop condition can be arbitrarily set.

[0121] As explained above, the power supply method involved in this embodiment includes: obtaining the required voltage value of the discharge connector connected to the socket 210 of the vehicle 200 (S101); determining whether the discharge connector connected to the socket 210 is a single-phase 3-wire connector (a discharge connector having voltage lines L11, L12 and neutral line L13) (S103); and if the discharge connector connected to the socket 210 is a single-phase 3-wire connector ("200V" in S103), making the first socket To1 (connected to voltage lines L11, L12 and neutral line L13) power supply to the first socket To1 (connected to voltage lines L11, L12 and neutral line L13). The system applies AC voltage (S112) between voltage line L11 and neutral line L13 and between voltage line L12 and neutral line L13, respectively, by making the second socket To2, which is connected to voltage line L11 and neutral line L13, output an AC voltage (AC200V) equivalent to the required voltage value, and the third socket To3, which is connected to voltage line L12 and neutral line L13, output an AC voltage (AC100V) equivalent to half the required voltage value.

[0122] According to the above power supply method, AC200V AC power can be output from the first socket To1 while suppressing design changes to the original vehicle, and AC100V AC power can be output from the second socket To2 and the third socket To3 respectively.

[0123] The control chart used in the identification of discharge connectors is not limited to Figure 13 The potential diagram M2 is shown. For example, the ECU250 can also use a potential range other than 0.0 to 1.2V to detect the required voltage value of the discharge connector. More specifically, any one of the potential ranges of 1.639 to 2.553V, 2.944 to 4.301V, and 4.567 to 4.700V, which are not defined in the charging specification "IEC61851-1", can be assigned a connection range including a 100V range, a 200V range, and a discharge start range.

[0124] In the above embodiment, an example of outputting AC100V / AC200V using single-phase 3-wire wiring is shown, but the output voltage using single-phase 3-wire wiring can be appropriately changed. For example, AC110V / AC220V, AC115V / AC230V, or AC120V / AC240V can also be output using single-phase 3-wire wiring.

[0125] The structure of a single-phase 3-wire connector is not limited to Figures 5-9The structure shown is as follows. For example, the third socket To3 can be omitted. Additionally, the cover 120 can also be omitted. Furthermore, the discharge start switch 112 can also be omitted. The trigger for starting the discharge can be arbitrarily set. For example, discharge can begin after a predetermined time has elapsed since the connector transitioned from the connected state to the connected state. Alternatively, discharge can begin when the user operates a switch installed in the vehicle.

[0126] The single-phase 3-wire connector may also include a conversion device that transforms the 2 wires connected to the first end into 3 wires: a first voltage line, a second voltage line, and a neutral line. Figure 15 It is shown Figure 8 A diagram showing a variation of the structure.

[0127] Reference Figure 15 Vehicle 200B includes a socket 210B and an AC power supply 220B. The AC power supply 220B is configured to apply an AC voltage between AC1 and AC2 of the socket 210B. The AC power supply 220B is electrically connected to AC1 and AC2 of the socket 210B via voltage lines L21B and L22B. The GND of the socket 210B is grounded to the vehicle body (vehicle ground) of the vehicle 200B via ground line L23B. The AC power supply 220B is configured to include an on-board battery (e.g., ...). Figure 2 The battery 230 shown is a power conversion circuit. The power conversion circuit of the AC power supply 220B can be configured as an on-board charger (e.g., capable of bidirectional power conversion). Figure 4 The charger 222 shown can also be a vehicle inverter (e.g., Figure 3 The AC inverter 221 shown is shown.

[0128] The discharge connector 100B includes a conversion device 150 that transforms single-phase 2-wire wiring into single-phase 3-wire wiring. Figure 15 In the example shown, the conversion device 150 is an insulated transformer including a primary coil 151, a secondary coil 152a, and a secondary coil 152b. On the primary side (first end P1B side) of the conversion device 150 in the discharge connector 100B, a single-phase two-wire wiring L30B (voltage lines L31B and L32B) is provided. AC1 and AC2 of the first end P1B are connected to voltage lines L31B and L32B, respectively. The first end P1B and the conversion device 150 are electrically connected via the aforementioned two wires. The primary coil 151 is connected between voltage lines L31B and L32B. On the secondary side (second end P2B side) of the conversion device 150 in the discharge connector 100B, a single-phase three-wire wiring L10B (voltage lines L11B, L12B, and neutral line L13B) is provided. Figure 8Similarly, voltage lines L11, L12, and neutral line L13 are connected to the first to third sockets To1B to To3B of the second end P2B. The conversion device 150 and the second end P2B are electrically connected via these three wires. A secondary coil 152a is connected between voltage lines L11B and neutral line L13B. A secondary coil 152b is connected between voltage lines L12B and neutral line L13B. In the conversion device 150, an AC voltage, for example, equivalent to half the voltage applied from socket 210B to the primary coil 151, is transmitted to each of the secondary coils 152a and 152b. Figure 15 In the example shown, AC 200V is applied to the primary coil 151, and AC 100V is applied to the secondary coils 152a and 152b respectively.

[0129] Regarding the discharge connector 100B, the receptacle terminals electrically connected to voltage line L11B, voltage line L12B, and neutral line L13B are respectively labeled "L1", "L2", and "PE". Examples of the receptacle terminals for each of the first to third receptacle terminals To1B to To3B are as follows: Figure 15 As shown. According to the above-described modified example, the discharge connector 100B can receive AC power from the socket 210B of the vehicle 200B in a single-phase two-wire manner, and output AC power to the second end P2B (including the first to third sockets To1B to To3B) in a single-phase three-wire manner.

[0130] In the above embodiments and variations, the discharge connector unit (e.g., discharge connector 100 or 100B) functions as a discharge assembly. However, the discharge assembly does not necessarily have to be composed solely of the discharge connector. Figure 16 It is shown Figure 5 as well as Figure 6 A diagram showing a modified example of the discharge assembly (discharge connector).

[0131] Reference Figure 16 The discharge assembly 500 includes: a discharge connector 511; a housing 520 housing circuitry electrically connected to the discharge connector 511; and a cable 512 connecting the discharge connector 511 and the housing 520. The housing 520 corresponds to the main body of the EVPS (Electric Vehicle Power System). The EVPS is configured to control the charging and discharging of the vehicle. The housing 520 may also include a display. The discharge assembly 500 is configured to include the EVPS and a charge / discharge cable assembly. The charge / discharge cable assembly is a cable assembly connecting the vehicle and the EVPS, including a charge / discharge connector connected to the vehicle. Figure 16In the example shown, the discharge connector 511 functions as a charge / discharge connector. Additionally, the cable 512 functions as a charge / discharge cable.

[0132] The discharge connector 511 has a first end P51 of a discharge assembly 500 configured to connect to a socket 210 of the vehicle 200. The housing 520 includes a socket box 530. The socket box 530 includes a second end P52 of the discharge assembly 500. In this modified example, Figure 7 as well as Figure 8 The circuit shown (the circuit of the discharge connector 100) is located inside the discharge connector 511, the cable 512, and the housing 520. Figure 17 This is a diagram showing the internal structure of the socket box 530.

[0133] Reference Figure 17 The socket box 530 includes a cover 532 that covers the second end P52 in the closed state and exposes the second end P52 in the open state. The second end P52 includes a first socket To5, a second socket To6, and a third socket To7. The first socket To5, the second socket To6, and the third socket To7 have respective... Figure 8 The first socket To1, the second socket To2, and the third socket To3 shown have the same terminal structure. However, the second socket To6 and the third socket To7 are positioned separately from each other. The cover 532 is mounted to the body 531 of the socket box 530 via a rotating mechanism 533 (e.g., a hinge). Inside the cover 532, a mechanism is provided for the cable (e.g.,...) to... Figure 1 The power cable 320 shown is inserted into the hole 534.

[0134] In the above Figure 16 as well as Figure 17 In the modified example of the discharge assembly 500 shown, the discharge connector 511 and the housing 520 are connected via a cable 512, making it easy to position the first end P51 and the second end P52 in separate positions. Therefore, the degree of freedom in the configuration related to the socket is increased. Furthermore, a portion of the discharge circuit can be housed within the housing 520, making it easy to miniaturize the discharge connector 511.

[0135] In the above embodiments, discharge connectors with two voltages (100V / 200V) can be connected to the vehicle's connector, but the vehicle's connector can also be connected to discharge connectors with three or more voltages. Furthermore, in the above embodiments, AC power is output from the vehicle's connector to the discharge connector. However, this is not a limitation; DC power can also be supplied from the vehicle's connector to the discharge connector, with DC / AC conversion performed at the discharge connector. In the above embodiments and their variations, the vehicle is not limited to a BEV, but can also be other xEVs (e.g., PHEVs or FCEVs). The discharge body with the discharge port is not limited to vehicles and can be arbitrary. For example, the discharge body can also be a stationary energy storage device.

[0136] The various variations described above can be combined arbitrarily to implement them. For example, they can also be... Figure 15 The circuit shown (the circuit of discharge connector 100B) is set in Figure 16 The discharge connector 511, cable 512, and the interior of the housing 520 are shown. Figure 15 The transformation device 150 shown can be set in Figure 16 The discharge connector 511 shown can also be provided in Figure 16 The frame shown is 520.

[0137] Embodiments of the present invention have been described, but should be considered as illustrative in all respects and not restrictive. The scope of the invention is defined by the claims and is intended to include all modifications within the scope and equivalent to the claims.

Claims

1. A discharge assembly having a discharge connector configured to connect to a discharge port, wherein, The discharge assembly includes: At the first end, power is input from the connected discharge port; The first voltage line, the second voltage line, and the neutral line; and The second end outputs the first AC power and the second AC power. The discharge connector has the first end. The first AC power applies a first voltage between the first voltage line and the neutral line. The second AC power supply applies a second voltage between the second voltage line and the neutral line. The second end includes a first socket and a second socket. The first socket has a first voltage terminal connected to the first voltage line, a second voltage terminal connected to the second voltage line, and a ground terminal connected to the neutral line. The second socket has a voltage terminal connected to the first voltage line and a ground terminal connected to the neutral line. The discharge assembly also includes a conversion device that transforms the two wires connected to the first end into three wires: the first voltage line, the second voltage line, and the neutral line. This conversion device converts the single-phase two-wire AC power input from the discharge port into single-phase three-wire AC power. The first end and the conversion device are electrically connected via the two wires. The conversion device and the second end are electrically connected via the three wires.

2. The discharge assembly according to claim 1, wherein, The first voltage line, the second voltage line, and the neutral line are disposed from the first end to the second end. The first AC power and the second AC power are input from the discharge port to the first end, and are transmitted to the second end via the first voltage line, the second voltage line and the neutral line.

3. The discharge assembly according to claim 2, wherein, The vehicle is equipped with the discharge port, and the vehicle also includes an energy storage device, a first power conversion circuit, and a second power conversion circuit. The first power conversion circuit and the second power conversion circuit are each configured to receive DC power from the energy storage device and output AC power to the discharge port. The discharge port has a first output terminal, a second output terminal, and a ground terminal grounded to the vehicle body. Between the first output terminal and the ground terminal in the discharge port, the first AC power is output from the energy storage device via the first power conversion circuit. Between the second output terminal and the ground terminal in the discharge port, the second AC power is output from the energy storage device via the second power conversion circuit. The first end includes a first input terminal connected to the first voltage line, a second input terminal connected to the second voltage line, and a ground terminal connected to the neutral line. When the discharge connector and the discharge port are connected, the first input terminal, the second input terminal, and the ground terminal at the first end are respectively connected to the first output terminal, the second output terminal, and the ground terminal of the discharge port.

4. The discharge assembly according to any one of claims 1 to 3, wherein, The second end also includes a third socket. The third socket has a voltage terminal connected to the second voltage line and a ground terminal connected to the neutral line.

5. The discharge assembly according to any one of claims 1 to 3, wherein, The first voltage and the second voltage are both above 95V and below 150V.

6. The discharge assembly according to any one of claims 1 to 3, wherein, The first end has a detection terminal that outputs a connector signal representing the required voltage value of the discharge connector electrically connected to the discharge port.

7. The discharge assembly according to claim 6, wherein, The connector signal is a potential signal that, in addition to indicating the required voltage value, also indicates the state of the discharge connector and the discharge port. The discharge connector also includes a detection circuit that adjusts the potential of the detection terminal based on the state of the discharge connector and the discharge port.

8. The discharge assembly according to claim 7, wherein, The neutral line is electrically connected to the detection terminal via the detection circuit. The states determined by the connector signal include an unfitted state, a fitted state, and a connected state. The "unfitted" state refers to the state where the discharge connector and the discharge port are not electrically connected. The engagement state is a state in which the discharge connector and the discharge port are electrically connected, and the discharge connector is not locked. The connection state refers to the state where the discharge connector and the discharge port are electrically connected, and the discharge connector is locked. The detection circuit includes a switch that is latched to the discharge connector and an electrical resistor connected in parallel with the switch.

9. The discharge assembly according to any one of claims 1 to 3, wherein, The discharge connector has a second end in addition to the first end.

10. The discharge assembly according to any one of claims 1 to 3, wherein, The discharge assembly also features: The frame contains a circuit electrically connected to the discharge connector; and The cable connects the discharge connector and the frame. The frame has the second end.

11. A power supply system, comprising: The vehicle is equipped with a discharge port; and The discharge assembly is configured to be connected to the discharge port. in, The discharge assembly includes: At the first end, power is input from the connected discharge port; The first voltage line, the second voltage line, and the neutral line; and The second end outputs the first AC power and the second AC power. The first AC power applies a first voltage between the first voltage line and the neutral line. The second AC power supply applies a second voltage between the second voltage line and the neutral line. The second end includes a first socket and a second socket. The first socket has a first voltage terminal connected to the first voltage line, a second voltage terminal connected to the second voltage line, and a ground terminal connected to the neutral line. The second socket has a voltage terminal connected to the first voltage line and a ground terminal connected to the neutral line. The vehicle also has an energy storage device and a power conversion circuit. The power conversion circuit is configured to receive power from the energy storage device and output power to the discharge port. The discharge assembly also includes a conversion device that transforms the two wires connected to the first end into three wires: the first voltage line, the second voltage line, and the neutral line. This conversion device converts the single-phase two-wire AC power input from the discharge port into single-phase three-wire AC power. The first end and the conversion device are electrically connected via the two wires. The conversion device and the second end are electrically connected via the three wires.

12. A power supply method, comprising: Obtain the required voltage value of the discharge connector connected to the discharge port; Determine whether the discharge connector connected to the discharge port is a single-phase 3-wire connector having a first voltage line, a second voltage line, and a neutral line. The single-phase 3-wire connector further includes a conversion device that transforms the two wires connected to the first end receiving power from the discharge port into the three wires: the first voltage line, the second voltage line, and the neutral line. This conversion device is used to convert the single-phase 2-wire AC power input from the discharge port into single-phase 3-wire AC power. When the discharge connector connected to the discharge port is a single-phase 3-wire connector, an AC voltage is applied between the first voltage line and the neutral line and between the second voltage line and the neutral line, respectively, so that the first socket connected to the first voltage line, the second voltage line and the neutral line outputs an AC voltage equivalent to the required voltage value, and the second socket connected to the first voltage line and the neutral line outputs an AC voltage equivalent to half of the required voltage value.

13. The power supply method according to claim 12, wherein, In the aforementioned judgment, If the required voltage value is within a predetermined range, it is determined that the discharge connector connected to the discharge port is the single-phase 3-wire connector.

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