JP5435920B2 - Electronic control device, plug-in vehicle, and power supply path switching method - Google Patents

Description

  The present invention includes an in-vehicle outlet into which a power plug of an AC device can be inserted, charges a battery mounted in a vehicle via a charging cable from an external power source, and plugs in a vehicle that supplies power to the in-vehicle outlet from the battery. The present invention relates to an electronic control device that controls power feeding to the in-vehicle outlet, a plug-in vehicle, and a power feeding path switching method.

  In the vehicle, it is possible to supply battery power to an external load by configuring the vehicle to be able to exchange power with the outside. For example, it is possible to provide an in-vehicle outlet into which a power plug of an AC device as an external load can be inserted in the vehicle interior, and to supply battery power to the AC device through the in-vehicle outlet and the power plug.

  Also, communication between the inside of the vehicle (for example, an electronic control device mounted on the vehicle) and the outside (for example, the AC device) is enabled by power line communication using a power line for transmitting and receiving power to and from the outside. Can do.

  As an electric system that can exchange electric power with the outside and is mounted on a vehicle, Patent Document 1 discloses an electric motor that operates based on a given command, a power storage device that transfers electric power to and from the electric motor, An electric system including a power line configured to be able to exchange power between the apparatus and a device outside the vehicle, and a communication device configured to communicate with the device outside the vehicle via the power line It is disclosed.

  By the way, there is known a vehicle capable of directly charging a vehicle driving battery mounted on the vehicle as described above from a power source of a general household. For example, by connecting a commercial power outlet provided in a house and a charging port provided in a vehicle with a charging cable, power is supplied from the power supply of a general household to the battery. A vehicle capable of directly charging a battery mounted on the vehicle from a power source outside the vehicle is referred to as a “plug-in vehicle”.

In a conventional plug-in vehicle, in order to use AC 100V for home use in the vehicle interior, as shown in FIG. 1, the power once charged in the battery 200 from the commercial power source 100 or the like is converted into DC / AC by the converter 300 or the like. It was necessary to generate AC100V by performing the conversion and supply the AC100V to an external load such as the AC device 500 via the in-vehicle outlet 400.
JP2007-151214A

  However, power supply to an external device in a conventional plug-in vehicle requires charging of the battery, DC / AC conversion, and the like when supplying power from the commercial power source to the external device. There is a risk that power loss and noise may occur due to passing through the DC / AC converter.

  Further, in a plug-in vehicle, when the plug-in vehicle is connected to a commercial power supply or the like via a charging cable, the computer is connected to an in-vehicle outlet so that the computer can be It may be possible to access the network.

  However, in a conventional plug-in vehicle, as described above, power is supplied from a commercial power source to a computer (AC device) via a battery or a DC / AC converter, so that the computer is accessed to an external network by power line communication. In addition, power line communication cannot be performed due to the presence of a battery or a DC / AC converter.

  In view of the above-described conventional problems, the object of the present invention is to allow power supply to an AC device connected to a vehicle-mounted outlet to be switched between power supply from an external power source and power supply from a vehicle-mounted battery. It is in the point which provides the electronic control apparatus which can reduce the power loss and noise, and the electric power feeding path switching method.

  Another object of the present invention is to provide a plug-in vehicle that enables power line communication between an AC device and an external device connected to an external power source in view of the above-described conventional problems.

In order to achieve the above-described object, the electronic controller according to the present invention is characterized by a first charging path including an AC / DC converter for charging a battery mounted on a vehicle from an external power source via a charging cable, and an AC device. A vehicle-mounted outlet into which a power plug can be inserted, a first power supply path including a DC / AC converter that supplies power from the battery to the vehicle-mounted outlet, and a second power supply path that supplies power to the vehicle-mounted outlet via the charging cable. The first power supply path or the second power supply path based on the detection result of the charging cable connection detection unit and the charging cable connection detection unit for detecting the connection state of the charging cable to the vehicle with respect to the plug-in vehicle comprising a feed path switching control section that supplies power to the vehicle power outlet by selecting one of said feeding path switching control unit further wherein There the feed path based on the power supply state from the mounting wall outlet to the AC device to the point of automatic switching.

According to the above-described configuration, the power feeding path switching control unit selects either the first power feeding path or the second power feeding path based on the detection result of the charging cable connection detection unit , and further feeds the AC from the in-vehicle outlet. Since the power supply path is automatically switched based on the power supply state to the device , power can be supplied more reliably, and power loss and noise can be reduced most .

  For example, when the charging cable connection detection unit detects that the external power supply is connected via the charging cable, the power feeding path switching control unit selects the second power feeding path and feeds power from the external power source to the in-vehicle outlet.

  When the charging cable connection detection unit detects that the external power supply is not connected, the power supply path switching control unit selects the first power supply path and supplies power from the in-vehicle battery to the in-vehicle outlet.

  In addition, when the remaining capacity of the in-vehicle battery is small (that is, discharge is not desirable), it is detected by the charging cable connection detection unit, and when it is detected by the charging cable connection detection unit that it is connected to an external power source, the power feeding path is switched. The control unit selects the second power feeding path and feeds power from the external power source to the in-vehicle outlet.

  When the second power feeding path is selected, power is supplied from the external power source to the in-vehicle outlet without going through the battery or the converter, so that it is possible to reduce power loss in the converter and noise due to the presence of the battery and the converter.

  When the second power feeding path is selected, power is supplied from the external power source to the AC device connected to the in-vehicle outlet without using the in-vehicle battery. That is, there is no battery or DC / AC converter between the AC device and the external device connected to the external power source. Therefore, power line communication between the AC device and the external device becomes possible.

  As described above, according to the present invention, the power supply to the AC device connected to the on-vehicle outlet can be switched between the power supply from the external power source and the power supply from the on-vehicle battery, An electronic control device that can reduce noise can be provided.

  Further, according to the present invention, it is possible to provide a plug-in vehicle that enables power line communication between an AC device and an external device connected to an external power source.

  Hereinafter, an electronic control device, a plug-in vehicle, and a power feeding path switching method according to the present invention will be described with respect to an embodiment in which the electronic control device is mounted on a plug-in hybrid vehicle 1.

  As shown in FIG. 2, the plug-in hybrid vehicle 1 includes a rotating electrical machine 12 including an engine 11, a generator 121, and a drive motor 122, a power split mechanism 13, a speed reducer 14, a battery 15, drive wheels 16, an inverter 17, and a converter. 18 and SMR (System Main Relay) 19, and a plurality of ECUs 2 including a hybrid ECU (hereinafter referred to as HV-ECU) 21 as an electronic control device (hereinafter referred to as ECU) according to the present invention. Has been.

  The battery 15 is composed of an assembled battery such as a lithium ion battery or a nickel metal hydride battery in which a plurality of modules each having a plurality of battery cells integrated are connected in series. In many cases, the hybrid vehicle 1 includes a high-voltage battery and a low-voltage battery. In the present embodiment, a case where a single battery 15 is provided will be described.

  In the plug-in hybrid vehicle 1, the engine 11, the generator 121, and the drive motor 122 are connected to the power split mechanism 13 so that the plug-in hybrid vehicle 1 can travel with a driving force from at least one of the engine 11 and the drive motor 122.

  The power generated by the engine 11 is divided by the power split mechanism 13 into two paths: a path that is transmitted to the drive wheels 16 via the speed reducer 14 and a path that is transmitted to the generator 121.

  The generator 121 and the drive motor 122 are AC rotating electric machines, and for example, a three-phase AC synchronous motor including a U-phase coil, a V-phase coil, and a W-phase coil is used.

  The generator 121 is driven by the power of the engine 11 divided by the power split mechanism 13 to generate power. For example, when the remaining capacity of the battery 15 (hereinafter also referred to as “SOC (State Of Charge)”) becomes lower than a predetermined value, the engine 11 is started and the generator 121 generates power, and the generator 121 is generated. Is converted from alternating current to direct current via the inverter 17 and the voltage is adjusted via the converter 18 and then stored in the battery 15.

  Note that the SOC of the battery 15 is calculated by the ECU 2 (for example, the HV-ECU 21 or a battery ECU 22 described in another embodiment). In the present embodiment, the HV-ECU 21 will be described as calculating the SOC of the battery 15. The HV-ECU 21 that calculates the SOC of the battery 15 includes a voltage measurement unit that measures the output voltage of the battery 15, a current measurement unit that measures the output current of the battery 15, a temperature measurement unit that measures the temperature of the battery 15, and the like. The HV-ECU 21 calculates the SOC of the battery 15 based on these measured values.

  The drive motor 122 generates a driving force using at least one of the electric power stored in the battery 15 and the electric power generated by the generator 121, and the driving force is transmitted to the driving wheel 16 via the gear mechanism 131 and the speed reducer 14. Is transmitted to. The drive motor 122 causes the vehicle to travel by assisting the engine 11 or by its own driving force. In FIG. 2, the drive wheel 16 is shown as the front wheel 16A, but the rear wheel 16B may be driven by the drive motor 122 instead of the front wheel or together with the front wheel.

  As shown in FIG. 3, the converter 18 includes a reactor, two npn transistors, and two diodes. The reactor has one end connected to the positive side of the battery 15 and the other end connected to the connection node of the two npn transistors. Two npn transistors are connected in series, and a diode is connected in antiparallel to each npn transistor.

  As the npn type transistor, for example, an IGBT (Insulated Gate Bipolar Transistor) can be used. Further, a power switching element such as a power MOSFET (Metal Oxide Semiconductor Field-Effect Transistor) may be used instead of the npn transistor.

  When the electric power is supplied from the battery 15 to the generator 121 or the drive motor 122, the converter 18 boosts the electric power discharged from the battery 15 based on a control signal from the ECU 2 (for example, the HV-ECU 21). 121 or drive motor 122. Further, when charging the battery 15, the converter 18 steps down the power supplied from the generator 121 or the drive motor 122 and outputs it to the battery 15.

  The converter 18 varies the level of the voltage to be boosted based on the magnitude of the required torque from the HV-ECU 21 described later. For example, when the driver is not squeezing the accelerator, the voltage is not boosted, and the boost is increased to a larger voltage as the driver steps on the accelerator.

  The SMR 19 is provided between the battery 15 and the converter 18. The SMR 19 is a relay for performing electrical connection / disconnection between the battery 15 and the electrical system of the plug-in hybrid vehicle 1, and is on / off controlled by any of the ECUs 2 described later, for example, the HV-ECU 21.

  The inverter 17 includes, for example, a first inverter 171 corresponding to the generator 121 and a second inverter 172 corresponding to the drive motor 122.

  The first inverter 171 converts the DC power supplied from the converter 18 into AC power and supplies it to the generator 121. In addition, the first inverter 171 converts the AC power generated by the generator 121 into DC power and supplies it to the converter 18.

  Second inverter 172 converts the DC power supplied from converter 18 into AC power and supplies it to drive motor 122. Second inverter 172 converts AC power generated by drive motor 122 into DC power and supplies it to converter 18.

  The power split mechanism 13 shown in FIG. 2 includes a planetary gear including a sun gear, a pinion gear, a carrier, and a ring gear. The pinion gear engages with the sun gear and the ring gear, and the carrier supports the pinion gear so that it can rotate, and is connected to the crankshaft of the engine 11. The sun gear is connected to the rotating shaft of the generator 121, and the ring gear is connected to the rotating shaft of the drive motor 122 and the speed reducer 14.

  The engine 11, the generator 121, and the drive motor 122 are connected via the power split mechanism 13 formed of planetary gears, so that the rotation of the engine 11, the generator 121, and the drive motor 122 is performed as shown in FIG. Numbers are connected by straight lines on the nomograph.

  The ECU 2 includes an engine ECU 23 that controls the intake air amount and the fuel injection amount of the engine 11, an MG-ECU 24 that controls the rotating electrical machine 12, the required power of the plug-in hybrid vehicle, the charging permission power Win and the discharge of the battery 15. An HV-ECU 21 is provided that determines distribution of power between the engine 11 and the rotating electrical machine 12 based on the permitted power Wout and instructs the engine ECU 23 or MG-ECU 24 to output power according to the distribution. Has been.

  Each ECU 2 is provided with a microcomputer including a CPU, a ROM and / or EEPROM storing a control program executed by the CPU, a RAM used as a working area, an input / output circuit, and the like. Each ECU 2 is connected to be communicable with each other.

  The engine ECU 23 outputs signals from sensors such as a throttle opening sensor and an A / F sensor provided in the engine 11, and communication data from other ECUs 2 (for example, data indicating required power from the HV-ECU 21). Based on the above, the state of the engine 11 is grasped, and the engine 11 is driven and controlled so as to have an appropriate rotational speed by controlling the amount of fuel supplied to the engine 11 and the supply timing.

  The MG-ECU 24 drives and controls the rotating electrical machine 12 so as to satisfy the required torque of the rotating electrical machine 12 input from the HV-ECU 21, and the HV-ECU 21 requests the rotating electrical machine 12 to output each battery 15. In some cases, the rotary electric machine 12 is driven and controlled in order to secure a power generation amount that satisfies the output request.

  The HV-ECU 21 controls the power supply from the battery 15 mounted on the vehicle to the rotating electrical machine 12 to cause the vehicle to travel, and controls the battery 15 to charge the power generated by the rotating electrical machine 12.

  This will be described in detail below. The HV-ECU 21 requests the driver based on the driving state of the plug-in hybrid vehicle 1 such as the accelerator opening obtained from the accelerator position sensor, the shift position obtained from the shift position sensor, and the vehicle speed information obtained from the vehicle speed sensor. Calculate the output.

  Further, the HV-ECU 21 calculates a power value required by the battery 150, that is, a battery required output from the SOC or the like.

  Then, the HV-ECU 21 calculates the required output to the engine to be output to the engine ECU 23 in order to generate the required power, using the total value of the calculated driver required output and the battery required output as the required power, and sends it to the MG-ECU 24. The required torque for the rotating electrical machine 12 to be output is calculated.

  The HV-ECU 21 supplies power to the rotating electrical machine 12 from the battery 15 during powering of the plug-in hybrid vehicle, and charges the MG-ECU 24 so that the battery 15 is charged with the generated power by the rotating electrical machine 12 during braking of the plug-in hybrid vehicle. The rotating electrical machine 12 is controlled.

  Specifically, the HV-ECU 21 distributes the required output to the engine 11 and the required torque to the rotating electrical machine 12 for the SOC of the battery 15 and the operating state of the plug-in hybrid vehicle stored in the ROM of the HV-ECU 21. MG-ECU 24 is rotated so that charging / discharging of battery 15 is executed so that the SOC is within the target range within the range of allowable charging power Win and allowable discharging power Wout. The electric machine 12 is controlled.

  The HV-ECU 21 commands the engine ECU 23 to switch between starting and stopping of the engine 11. For example, the HV-ECU 21 does not start the engine 11 and starts the plug-in hybrid with the driving force of the rotating electrical machine 12 at a light load such as when the plug-in hybrid vehicle starts, travels at a low speed, or goes down a gentle slope. The engine ECU 23 and the MG-ECU 24 are controlled to drive the vehicle. And when it will be in the driving | running state which requires the driving force beyond a predetermined value, engine ECU23 is controlled so that the engine 11 may be started.

  As described above, the HV-ECU 21 determines the power distribution between the engine 11 and the rotating electrical machine 12 based on the required power of the vehicle and the SOC of the battery 15 and controls the power split mechanism 13 as well as the engine ECU 23 and the MG- The ECU 24 is instructed to output power according to the distribution. The HV-ECU 21 repeats the above processing at a predetermined interval.

Further, in order to prevent overcharge or overdischarge, the HV-ECU 21 stores the charge / discharge power Pb of the battery 15 calculated by the following equation 1 within the range of the charge permission power Win and the discharge permission power Wout. In other words, the MG-ECU 24 is controlled to increase or decrease the generated power or the consumed power in the rotating electrical machine 12 so as to be larger than the charging permission power Win and smaller than the discharge permission power Wout. In Equation 1, Pg is the power of the generator 121, Pm is the power of the drive motor 122, Pac is the power consumption of the AC device 6 connected to the air conditioner mounted in the plug-in hybrid vehicle 1 and the in-vehicle outlet 7, Pi is an electrical loss in the converters 18, 51, 52, the inverter 17, and the like. Each term of Equation 1 is a positive value when power is consumed, and a negative value when power is generated.

  By the way, the plug-in hybrid vehicle 1 includes, as shown in FIGS. 3 and 5, a first charging path 1CR provided with an AC / DC converter 51 that charges the battery 15 mounted on the vehicle from the external power source 3 via the charging cable 4. An in-vehicle outlet 7 into which the power plug 61 of the AC device 6 can be inserted, a first power supply path 1SR having a DC / AC converter 52 for supplying electric power from the battery 15 to the in-vehicle outlet 7, and an in-vehicle outlet through the charging cable 4. The second power supply path 2SR for supplying power to the power supply 7 is provided.

  The external power source 3 is a commercial power source that supplies predetermined power (for example, a voltage of AC 100 V) to the device connected to the power outlet 31 via the power outlet 31, for example.

  The charging cable 4 includes a pair of power cables that feed power from the external power source 3 to the battery 15 of the plug-in hybrid vehicle 1 and the in-vehicle outlet 7, a connector 41, a plug 42, and a CCID (Charging Circuit Interrupt Device) 43. Yes.

  Connector 41 is configured to be connectable to charging inlet 8 provided in plug-in hybrid vehicle 1. The connector 41 is provided with a limit switch. When the connector 41 is connected to the charging inlet 8, the limit switch is activated, and a cable connection signal indicating that the connector 41 is connected to the charging inlet 8 is transmitted through the cable connection signal line L2 shown in FIG. -It inputs into ECU21. The plug 42 is connected to the power outlet 31.

  In FIG. 5, the charging inlet 8 is provided at the front of the vehicle, but the charging inlet 8 may be positioned on the side of the vehicle, the rear of the vehicle, or the like.

  As shown in FIG. 3, the CCID 43 includes a relay 431 and a control pilot circuit 432.

  Relay 431 is provided on a pair of power lines for supplying charging power from external power supply 3 to plug-in hybrid vehicle 1.

  The control pilot circuit 432 includes a microcomputer including a CPU, a ROM storing a control program executed by the CPU, and a RAM used as a working area. Then, power supply control described below is executed by the CPU executing the control program.

  The relay 431 is on / off controlled by the microcomputer of the control pilot circuit 432, and when the relay 431 is off, the path for supplying power from the external power source 3 to the plug-in hybrid vehicle 1 is blocked. On the other hand, when relay 431 is turned on, power can be supplied from external power supply 3 to plug-in hybrid vehicle 1.

  The control pilot circuit 432 operates with electric power supplied from the external power source 3 when the plug 42 is connected to the power outlet 31.

  The microcomputer of the control pilot circuit 432 generates a control pilot signal CPLT to be transmitted to the HV-ECU 21 via the control pilot line L1 as a control line for transmitting the control signal to the vehicle, and the connector 41 is charged to the charging inlet. 8 and when the potential of the control pilot signal CPLT drops to a specified value, the control pilot signal CPLT is oscillated at a specified duty cycle (ratio of the pulse width to the oscillation period).

  This duty cycle is set based on the current capacity that can be supplied from the external power source 3 to the plug-in hybrid vehicle 1 via the charging cable 4, that is, the rated current.

  The microcomputer of the control pilot circuit 432 notifies the HV-ECU 21 of the rated current using the control pilot signal CPLT according to the duty cycle.

  Note that the rated current is determined for each charging cable, and if the type of charging cable is different, the rated current is also different, so the duty of the control pilot signal CPLT is also different.

  Hereinafter, a procedure for executing charging of the battery 15 from the external power source 3 will be described. When connector 41 is connected to charging inlet 8 and a low-level cable connection signal is input to HV-ECU 21, HV-ECU 21 detects the voltage level of control pilot line L1 (the voltage level of control pilot signal CPLT). To do.

  When the HV-ECU 21 detects a high level voltage, the HV-ECU 21 reduces the voltage of the control pilot line L1 by a method such as changing the value of a pull-down resistor (not shown) connected to the control pilot line L1.

  When the microcomputer of the control pilot circuit 432 detects a decrease in the voltage of the control pilot line L1, the microcomputer oscillates the control pilot signal CPLT. The HV-ECU 21 starts charging the battery 15 when detecting the oscillation of the control pilot signal CPLT.

  The AC / DC converter 51 converts AC power supplied from the external power source 3 into DC power based on a control signal from the HV-ECU 21 when power is supplied from the external power source 3 to the battery 15. Output to. The DC / AC converter 52 converts the DC power supplied from the battery 15 into AC power based on a control signal from the HV-ECU 21 when power is supplied from the battery 15 to the AC device 6. Output to.

  The AC device 6 is a device used by a passenger of the vehicle in a passenger compartment or the like, such as a mobile phone or a personal computer. The in-vehicle outlet 7 has a shape into which the power plug 61 of the AC device 6 can be inserted, and is suitable for a vehicle occupant to use the AC device 6 while inserting the power plug 61, such as a dashboard. It is provided in the vicinity.

  In the present embodiment, the case where one in-vehicle outlet 7 is provided near the dashboard will be described, but the position and the number of the in-vehicle outlets 7 are not limited thereto. For example, the in-vehicle outlet 7 may be provided on the back surface of the front seat other than the vicinity of the dashboard. Thereby, the passenger sitting in the rear seat can use the AC device 6 comfortably. Also, a plurality of on-vehicle outlets 7 may be provided, for example, one in the vicinity of each seat of the plug-in hybrid vehicle 1. As a result, all the passengers of the plug-in hybrid vehicle 1 can comfortably use different AC devices 6.

  The HV-ECU 171 determines the plug-in hybrid vehicle 1 described above based on the detection result by the charging cable connection detection unit and the charging cable connection detection unit that detects the connection state of the charging cable 4 to the vehicle 1. A power supply path switching control unit that selects one of the first power supply path 1SR and the second power supply path 2SR and supplies power to the in-vehicle outlet 7 is provided. The functions of the functional blocks of the HV-ECU 171 such as the charging cable connection detection unit and the power supply path switching control unit are realized by the CPU of the HV-ECU 21 executing the control program.

  As described in the procedure for executing charging of the battery 15 from the external power source 3, the charging cable connection detection unit determines whether the charging cable 4 is connected to the plug-in hybrid vehicle 1 based on the result of detecting the voltage of the control pilot line L1. Is detected.

  That is, the charging cable connection detection unit determines that the charging cable 4 is connected to the plug-in hybrid vehicle 1 when detecting a high level voltage on the control pilot line L1. On the other hand, when the charging inlet 8 and the connector 41 are not connected, when the plug 42 and the power outlet 31 are not connected, or when the charging cable 4 is connected to the plug-in hybrid vehicle 1, The charging cable connection detector does not detect a high level voltage on the control pilot line L1, and therefore determines that the charging cable 4 is not connected to the plug-in hybrid vehicle 1.

  When the charging cable connection detecting unit determines that the charging cable 4 is connected to the plug-in hybrid vehicle 1, the control pilot signal CPLT is sent to the microcomputer of the charging cable 4 by reducing the voltage of the control pilot line L1. Encourage oscillation. Thereafter, when the oscillation of the control pilot signal CPLT is detected, charging of the battery 15 is started.

  The power feeding path switching control unit switches the switch SW1 provided on the first charging path 1CR, the switch SW3 provided on the first power feeding path 1SR, and the switch SW2 provided on the second power feeding path 2SR. Switch the power supply path. Each switch SW1, SW2, SW3 is configured by a relay or the like.

  This will be described in detail below. When the charging cable connection detection unit detects that the external power source 3 and the plug-in hybrid vehicle 1 are not connected via the charging cable 4, the power supply path switching control unit turns off the switches SW1 and SW2 and turns on the switch SW3. By switching to, power is supplied from the battery 15 to the in-vehicle outlet 7, in other words, the AC device 6 connected to the in-vehicle outlet 7 through the first power supply path 1 SR.

  On the other hand, when the charging cable connection detection unit detects that the external power supply 3 and the plug-in hybrid vehicle 1 are connected via the charging cable 4, the power supply path switching control unit is based on a predetermined condition described later. By switching on / off of the switches SW1, SW2, and SW3, the power supply source to the in-vehicle outlet 7 is switched between the external power source 3 and the battery 15.

  In addition, when the power supply path switching control unit detects that the power plug 61 of the AC device 6 is inserted into the in-vehicle outlet 7, the power supply path switching control unit may select one of the power supply paths and supply power to the in-vehicle outlet 7.

  This will be described in detail below. When the power supply path switching control unit detects that the power plug 61 of the AC device 6 is inserted into the in-vehicle outlet 7, the power supply path switching control unit determines whether the external power source 3 is connected to the plug-in hybrid vehicle 1 and a predetermined condition described later. Based on the on / off switching of the switches SW1, SW2, and SW3, the power supply source to the in-vehicle outlet 7 is switched between the external power source 3 and the battery 15.

  On the other hand, when the power supply path switching control unit does not detect that the power plug 61 of the AC device 6 is inserted into the in-vehicle outlet 7, the power supply to the in-vehicle outlet 7 is stopped by switching off the switches SW2 and SW3. .

  Here, whether or not the power plug 61 of the AC device 6 is inserted into the in-vehicle outlet 7 can be determined by providing a limit switch in the same manner as the connector 41 in the in-vehicle outlet 7, for example. In this case, when the AC device 6 is connected to the in-vehicle outlet 7, the limit switch is activated, and a connection signal indicating that the AC device 6 is connected to the in-vehicle outlet 7 is input to the HV-ECU 21.

  According to the configuration described above, the power supply path switching control unit selects a power supply path to the in-vehicle outlet 7 only when the AC device 6 to be supplied with power is connected to the in-vehicle outlet 7. As a result, when the AC device 6 is not connected to the in-vehicle outlet 7, the first charging path 1CR can be selected to charge the battery 15.

  The switching of the power feeding path by the power feeding path switching control unit described above is automatically performed based on the detection result by the charging cable connection detection unit and whether or not the power plug 61 of the AC device 6 is inserted into the in-vehicle outlet 7. .

  However, the power feeding path switching control unit may switch the power feeding path based on a path switching signal input from the power feeding path switching operation unit.

  The power supply path switching operation unit is provided, for example, near the operation key for power supply path switching displayed on the liquid crystal touch panel of the navigation device of the plug-in hybrid vehicle 1 or the dashboard of the plug-in hybrid vehicle 1 for power supply path switching. Mechanical operation keys. The user operates the operation key to select whether the power supply source for the AC device 6 is the external power supply 3 or the battery 15.

  When the power feeding path switching operation unit is operated by the user, the power feeding path switching control unit switches the switches SW1, SW2, and SW3 according to the operation.

  According to the above configuration, the user of the plug-in hybrid vehicle 1 determines whether to supply power from the external power source 3 to the AC device 6, to supply power from the battery 15 to the AC device 6, or to charge the battery 15 from the external power source 3. , You can choose at your own will.

  For example, when power line communication is performed with an external device such as a personal computer connected to the external power source 3 using the AC device 6 connected to the in-vehicle outlet 7, the external power source 3 and the AC device 6 are connected via the battery 15 or the like. In such a case, the user can select the power supply from the external power supply 3 to the AC device 6, that is, the power supply via the second power supply path 2SR by a manual operation. .

  That is, when the user manually selects power supply via the second power supply path 2SR, the plug-in hybrid vehicle 1 is connected to the vehicle-mounted device connected to the external power source 3 via the second power supply path 2SR. Power line communication is performed with the AC device 6 connected to the outlet 7.

  Hereinafter, the predetermined conditions will be described. The predetermined condition is, for example, the operating state of the battery 15. That is, the power feeding path switching control unit may automatically switch the power feeding path based on the operating state of the battery 15.

  Here, the operating state of the battery 15 is, for example, the remaining capacity of the battery 15. When the remaining capacity of the battery 15 is smaller than a predetermined value (for example, a value slightly larger than the discharge permission power Wout), the power supply path switching control unit determines that further discharging from the battery 15 is not preferable, The switch SW2 is turned on and the switch SW3 is turned off to supply power to the in-vehicle outlet 7 through the second power supply path 2SR. That is, the power supply path switching control unit prioritizes power supply from the external power supply 3 over power supply from the battery 15.

  Further, the operating state of the battery 15 may be a discharged state of the battery 15. As described in Equation 1, the charge / discharge power Pb of the battery 15 needs to be within the range of the charge permission power Win and the discharge permission power Wout. However, when the power consumption of the air conditioner is large, that is, when Pac and Pi in Formula 1 are large, if power is supplied from the battery 15 to the vehicle outlet 7, the Pac further increases, and the charge / discharge power Pb becomes equal to the discharge permission power Wout. There is a risk of exceeding.

  Therefore, when the total value of Pac and Pi in Equation 1 is larger than a predetermined value set in advance, the power supply path switching control unit determines that further discharging from the battery 15 is not preferable, and turns on the switch SW2 to turn on the switch SW2. SW3 is switched off and power is supplied to the vehicle-mounted outlet 7 through the second power supply path 2SR. That is, the power supply path switching control unit prioritizes power supply from the external power supply 3 over power supply from the battery 15.

  Further, the discharge state of the battery 15 may include the conversion efficiency of a converter connected to the battery 15 (for example, the converter 52 used when power is supplied from the battery 15 to the in-vehicle outlet 7).

  For example, when the current flowing through the converter 52 used when power is supplied from the battery 15 to the in-vehicle outlet 7, excess current flowing through the converter 52 is consumed as heat. That is, the conversion efficiency of the converter 52 deteriorates as the flowing current increases and the electrical loss increases.

  Therefore, a current sensor is provided in the vicinity of the converter 52, and the current value flowing through the converter 52 is detected by the current sensor. The power supply path switching control unit is connected to the vehicle-mounted outlet from the battery 15 via the first power supply path 1SR only when the detection value of the current sensor is within a predetermined range (a range where it is determined that the electrical loss of the converter 52 is not excessive). 7 is fed.

  That is, when the detected value of the current sensor is outside the predetermined range, the power supply path switching control unit determines that the conversion efficiency of the converter 52 is low, switches the switch SW2 on, switches the switch SW3 off, Power is supplied to the in-vehicle outlet 7 through the power supply path 2SR. That is, the power supply path switching control unit gives priority to power supply from the external power supply 3 over power supply from the battery 15.

  Further, the operating state of the battery 15 may be the temperature of the battery 15. The power feeding path switching control unit feeds power from the battery 15 to the in-vehicle outlet 7 through the first power feeding path 1SR only when the temperature of the battery 15 is within a predetermined range.

  That is, when the temperature of the battery 15 is higher than a predetermined value, the power supply path switching control unit determines that the battery 15 is hot and dangerous, and when the temperature of the battery 15 is lower than the predetermined value, When it is determined that the output is reduced, the switch SW2 is turned on and the switch SW3 is turned off to supply power to the in-vehicle outlet 7 through the second power supply path 2SR. That is, the power supply path switching control unit gives priority to power supply from the external power supply 3 over power supply from the battery 15.

  The reason why the output of the battery 15 decreases at a low temperature is that the battery 15 releases power based on the chemical reaction, so that the chemical reaction slows down as the temperature decreases.

  Further, the operation state of the battery 15 may be a combination of the operation states described above. For example, when the power supply path switching control unit corresponds to at least one of the above-described operation states, corresponds to a predetermined number of the above-described operation states, or corresponds to all the above-described operation states, the external power supply 3 Power feeding from the battery 15 may be given priority over power feeding from the battery 15.

  According to the above-described configuration, the power supply path switching control unit supplies power from the external power supply 3 to the in-vehicle outlet 7 depending on the operation state of the battery 15, so that the battery 15 is not in a state suitable for discharging. By executing power feeding to the in-vehicle outlet 7, it is possible to prevent a failure of the battery 15, a decrease in output of the battery 15 to the air conditioner, and the like.

  The power supply path switching control unit may automatically switch the power supply path based on the power supply state from the in-vehicle outlet 7 to the AC device 6.

  The power supply state from the in-vehicle outlet 7 to the AC device 6 is, for example, the current capacity from the in-vehicle outlet 7 to the AC device 6. In this case, when the voltage of AC200V is input from the external power source 3 through the charging cable 4 to the in-vehicle outlet 7, and the voltage converted from the battery 15 to AC100V by the DC / AC converter 52 is input to the in-vehicle outlet 7. The power supply path switching control unit switches the power supply from the battery 15 so that the AC 200V is not input to the AC device 6 corresponding to the AC 100V connected to the in-vehicle outlet 7 and the AC device 6 does not break down.

  Note that the voltage input from the external power supply 3 is calculated from the rated current notified from the control pilot circuit 432 of the charging cable 4 to the HV-ECU 21.

  According to the above-described configuration, even when the charging cable 4 having a large rated current is erroneously connected to the plug-in hybrid vehicle 1, it is possible to prevent the AC device 6 from being broken.

  The power feeding path switching control unit may switch the power feeding path in preference to the automatic switching based on the path switching signal input from the power feeding path switching operation unit.

  In other words, even when the power feeding path switching operation unit automatically switches the power feeding path based on the operating state of the battery 15 and the like, when the user operates the power feeding path switching operation unit, the power feeding path switching based on the operation is performed. Is switched.

  According to the above-described configuration, the user can execute a manual operation with his / her own intention while reducing the user's effort by the automatic operation of the power supply path switching control unit.

  When detecting a failure in the battery 15 or the power supply path, the power supply path switching control unit may switch to a power supply path other than the corresponding power supply path.

  This will be described in detail below. The power supply path switching control unit should be supplied from the external power supply 3 to the in-vehicle outlet 7 by a voltage sensor or the like provided in the vicinity of the in-vehicle outlet 7 even though the switch SW2 is turned on and the second power supply path 2SR is selected. When the voltage is not detected, failure of the switch SW2, disconnection of the cable connecting the charging inlet 8 and the in-vehicle outlet 7, disconnection or failure of the charging cable 4, or failure of the external power source 3, that is, the second power supply path 2SR It is determined that there is a failure, and the switch SW2 is turned off and the switch SW3 is turned on to switch from the second power feeding path 2SR to the first power feeding path 1SR.

  If the voltage to be supplied from the external power supply 3 to the in-vehicle outlet 7 is not detected due to the failure of the switch SW2, the switch SW2 may not be switched. In this case, the switch SW3 is turned on. It is possible to switch from the second power supply path 2SR to the first power supply path 1SR simply by switching.

  On the contrary, the power supply path switching control unit turns on the switch SW3 and selects the first power supply path 1SR, but when the voltage to be supplied from the battery 15 to the in-vehicle outlet 7 is not detected, the switch SW3 It is determined that there is a failure, disconnection of the cable connecting battery 15 and in-vehicle outlet 7, DC / AC converter 52 failure, or battery 15 failure, that is, failure of first power supply path 1SR, and switch SW3 is turned off. At the same time, the switch SW2 is turned on to switch from the first power supply path 1SR to the second power supply path 2SR.

  According to the above-described configuration, it is possible to avoid a state where power cannot be supplied to the in-vehicle outlet 7 due to a failure in the power supply path.

  The HV-ECU 21 may include a display control unit that displays a selection state of a power feeding path to the in-vehicle outlet 7 on the display unit.

  This will be described in detail below. The display unit is, for example, a liquid crystal panel of the navigation device of the plug-in hybrid vehicle 1. The display control unit uses, for example, the external power supply 3, the battery 15, and the power feeding paths 1CR, 1SR, 2SR as display elements, and abstracts the display elements, names of the power feeding paths 1CR, 1SR, 2SR, and the like. Display on the display. Then, the display control unit changes the display mode of the power feeding path currently selected by the power feeding path switching control unit to a display mode different from the display mode of the power feeding path that is not currently selected. To the user of the currently selected power supply path.

  According to the above configuration, the user of the plug-in hybrid vehicle 1 can recognize the currently selected power feeding path. In addition, when the user of the plug-in hybrid vehicle 1 recognizes whether or not the power supply path desired by the user is selected and it becomes clear that a different power supply path is selected, the power supply described above is performed. The power feeding path can be switched by operating the path switching operation unit.

  Hereinafter, the power supply path switching process by the HV-ECU 21 will be described based on the flowchart shown in FIG. 6.

  The charging cable connection detection unit determines whether or not the charging cable 4 is connected to the plug-in hybrid vehicle 1, that is, whether or not the external power supply 3 can supply power to the plug-in hybrid vehicle 1 through the charging cable 4. Is determined (SA1).

  When the charging cable 4 is not connected to the plug-in hybrid vehicle 1 (SA1), the power supply path switching control unit switches the switches SW1 and SW2 to off and switches the switch SW3 to on to supply power to the in-vehicle outlet 7. The source is the battery 15 (SA2).

  When the charging cable 4 is connected to the plug-in hybrid vehicle 1 (SA1) and the battery 15 is not being charged (SA3), the power feeding path switching control unit is one of the conditions of the following step SA4. The switches SW1, SW2, and SW3 are turned on / off depending on whether or not the above is satisfied. In step SA3, whether or not to charge the battery 15 depends on the current charging permission power Win and discharging permission power Wout of the battery 15 when the charging cable 4 is connected to the plug-in hybrid vehicle 1. Based on this, it is determined by the HV-ECU 21.

  The power supply path switching control unit has selected that the user supplies power to the AC device 6 from the external power source 3 by operating the power supply path switching operation unit, or the remaining capacity of the battery 15 is less than a predetermined value set in advance. (SA4), the switches SW1 and SW3 are turned off and the switch SW2 is turned on, so that the power supply source to the in-vehicle outlet 7 is the external power source 3 (SA5).

  On the other hand, when neither of the conditions of step SA4 is satisfied, the power supply path switching control unit switches off the switches SW1 and SW2 and switches on the switch SW3, so that the power supply source to the in-vehicle outlet 7 is the battery 15. (SA2).

  In step SA3, when the battery 15 is being charged (SA3), the power supply path switching control unit switches on / off of the switches SW1, SW2, and SW3 depending on whether or not the same conditions as in step SA4 are satisfied (SA6).

  That is, when the condition of step SA6 is satisfied, the power supply path switching control unit switches the switch SW3 to off and switches on the switches SW1 and SW2, thereby setting the power supply source to the in-vehicle outlet 7 as the external power source 3. At the same time, the battery 15 is charged from the external power source 3 (SA7).

  When the condition of step SA6 is not satisfied, the power supply path switching control unit switches the switch SW2 to off and switches on the switches SW1 and SW3, thereby setting the power supply source to the in-vehicle outlet 7 to the battery 15. Then, the battery 15 is charged from the external power source 3 (SA8).

  As described above, the power feeding path switching method according to the present invention includes the first charging path 1CR including the AC / DC converter 51 that charges the battery 15 mounted on the vehicle from the external power source 3 via the charging cable 4, and the AC device 6. An in-vehicle outlet 7 into which the power plug 61 can be inserted, a first power supply path 1SR having a DC / AC converter 52 for supplying electric power from the battery 15 to the in-vehicle outlet 7, and a first electric power supply to the in-vehicle outlet 7 via the charging cable 4. For the plug-in hybrid vehicle 1 having the two power supply paths 2SR, the connection state of the charging cable 4 to the vehicle is detected, and either the first power supply path 1SR or the second power supply path 2SR is determined based on the connection state. This is a method of selecting the power and supplying power to the in-vehicle outlet 7.

  Hereinafter, another embodiment will be described. In the above-described embodiment, the case where there is one battery 15 mounted on the plug-in hybrid vehicle 1 has been described. However, a plurality of, for example, two batteries 15 may be mounted.

  That is, as shown in FIG. 7, the battery 15 includes a high voltage battery 151 that is charged through the first charging path 1CR and a low voltage battery that is charged from the high voltage battery 151 through the second charging path 2CR including the step-down circuit 153. The first power supply path 1SR includes a high-voltage side power supply path 11SR that supplies power from the high-voltage battery 151 to the in-vehicle outlet 7, and a low-voltage side power supply path 12SR that supplies power from the low-voltage battery 152 to the in-vehicle outlet 7. The control unit may select one of the high voltage side power supply path 11SR, the low voltage side power supply path 12SR, and the second power supply path 2SR based on the detection result by the charging cable connection detection unit, and supply power to the in-vehicle outlet 7. .

  The high-voltage battery 151 is a battery used for power feeding to a drive system such as the rotating electrical machine 12, and the output voltage is 288V, for example. The low voltage battery 152 is a battery used for power feeding to auxiliary equipment such as an air conditioner, and the output voltage is 14 V, for example.

  The step-down circuit 153 is a circuit that steps down the output voltage of the high voltage battery 151 input from the high voltage battery 151 to the input voltage of the low voltage battery 151 and outputs the voltage to the low voltage battery 151.

  In the case of the present embodiment, the AC / DC converter 51 converts AC power supplied from the external power supply 3 into DC power based on a control signal from the HV-ECU 21 and outputs the DC power to the high voltage battery 151 and also the high voltage battery. The DC power input from 151 is converted into AC power and output to the in-vehicle outlet 7.

  In the case of the present embodiment, the power feeding path switching control unit automatically switches the power feeding path based on the operating states of the high voltage battery 151 and the low voltage battery 152 (remaining capacity, discharge state, temperature, etc. of the batteries 151 and 152). To do.

  For example, when the remaining capacity of the high voltage battery 151 is larger than the remaining capacity of the low voltage battery 152, the charge / discharge power of the high voltage battery 151 is smaller than the charge / discharge power of the low voltage battery 152, or the temperature of the high voltage battery 151 is the temperature of the low voltage battery 152. If it is lower, the power supply path switching control unit selects the high voltage battery 151 as the power supply source of the in-vehicle outlet 7. Of the remaining capacity, charge / discharge power, temperature, and other conditions, which condition is prioritized when selecting a power supply source is set in advance.

  Hereinafter, power supply path switching processing by the HV-ECU 21 in the present embodiment will be described based on the flowchart of FIG. 8.

  In FIG. 8, the processing of steps SB1, SB3-SB8 is the same as the processing of steps SA1, SA3-SA8 of FIG. 6, but the processing when none of the conditions of step SB4 is satisfied is different from FIG. . This will be described below.

  When none of the conditions in step SB4 is satisfied (SB4), the power supply path switching control unit compares the operating states of the high voltage battery 151 and the low voltage battery 152 (SB21).

  When the power supply path switching control unit determines that the high-voltage battery 151 is more efficient than the low-voltage battery 152, the switch SW3 is turned off and the switches SW1 and SW2 are turned on, so that the power supply source to the in-vehicle outlet 7 is determined. The high voltage battery 151 is set (SB22). That is, the power feeding path switching control unit selects the high voltage side power feeding path 11SR. Conversely, when the low voltage battery 152 is determined to be more efficient than the high voltage battery 151, the switches SW1 and SW2 are switched off and the switch SW3 is switched on, so that the power supply source to the in-vehicle outlet 7 is the low voltage battery 152 (SB23 ). That is, the power feeding path switching control unit selects the low voltage side power feeding path 12SR.

  According to the above-described configuration, the electronic control device (HV-ECU 21) according to the present invention can be used even when the plurality of batteries 15 are mounted on the plug-in hybrid vehicle 1.

  The AC device 6 connected to the in-vehicle outlet 7 in the above-described embodiment is normally a device compatible with AC100V, whereas the power supplied from the external power supply 3 via the charging cable 4 is from AC100V. It can be big. In that case, there is a possibility that the AC device 6 may break down when excessive power is supplied. Therefore, in order to prevent the failure, the plug-in hybrid vehicle 1 may include a step-down circuit that steps down the AC voltage input from the charging cable 4 to the second feeding path 2SR to a predetermined AC voltage (for example, AC 100V). Good.

  In the above-described embodiment, when power line communication is performed using the AC device 6 connected to the in-vehicle outlet 7, the user has selected to manually supply power from the external power source 3 to the AC device 6. However, the power feeding path switching control unit may automatically perform the selection.

  In order to realize such automatic selection, for example, a power line communication detection unit that detects that the AC device 6 is performing power line communication is provided in the plug-in hybrid vehicle 1. The power supply path switching control unit detects the insertion of the power plug 61 of the AC device 6 into the in-vehicle outlet 7, and the power line communication detection unit detects that the AC device 6 is performing power line communication. In this case, the second power supply path 2SR is selected.

  For example, the power line communication detection unit is connected to the in-vehicle outlet 7 in the vicinity of the in-vehicle outlet 7, and is also connected to the HV-ECU 21. The power line communication detection unit includes a communication interface circuit that communicates with the AC device 6 configured to enable power line communication by power line communication, a control unit such as a microcomputer that controls the communication interface circuit, and the like. ing.

  The power line communication detection unit is configured such that the AC device 6 is configured to be able to perform power line communication by receiving data transmitted by the power line communication from the AC device 6 connected to the in-vehicle outlet 7 by the communication interface circuit. Is output to the power supply path switching control unit of the HV-ECU 21.

  In the above-described embodiment, the case where the HV-ECU 21 calculates the SOC of the battery 15 has been described. However, the battery ECU that calculates the SOC of the battery 15 may be provided separately from the HV-ECU 21. In this case, the battery ECU calculates the SOC of the battery 15 based on the measurement values from the voltage measurement unit, the current measurement unit, the temperature measurement unit, and the like, and the HV-ECU 21 receives the SOC of the battery 15 from the battery ECU. .

  In the above-described embodiment, the case where the electronic control device (HV-ECU 21) according to the present invention is mounted on the plug-in hybrid vehicle 1 has been described. However, if the electronic control device is mounted on a plug-in vehicle, the hybrid is used. Not limited to vehicles.

  For example, the electronic control device may be mounted on a vehicle that travels only by the driving force of the engine 11 and may be a plug-in vehicle that can charge the battery 15 with the external power source 3. In this case, a low-voltage battery 152 is mounted as the battery 15.

  Note that the above-described embodiment is merely an example of the present invention, and it is needless to say that the specific configuration of each block can be changed and designed as appropriate within the scope of the effects of the present invention.

Functional block configuration diagram of a power supply system of a conventional plug-in hybrid vehicle Functional block diagram of plug-in hybrid vehicle Overall configuration diagram of the power supply system of the plug-in hybrid vehicle shown in FIG. Collinear diagram of power split mechanism Functional block configuration diagram of a power supply system of a plug-in hybrid vehicle equipped with the electronic control device of the present invention Flowchart for explaining power supply path switching processing Functional block configuration diagram of the power supply system of a plug-in hybrid vehicle equipped with two batteries Flow chart for explaining power supply path switching processing in a plug-in hybrid vehicle having two batteries

3: External power supply 4: Charging cable 6: AC device 7: In-vehicle outlet 15: Battery 51: AC / DC converter 52: DC / AC converter 61: Power plug 151: High voltage battery 152: Low voltage battery 153: Step-down circuit 1CR: No. One charging path 2CR: second charging path 1SR: first feeding path 2SR: second feeding path 11SR: high voltage side feeding path 12SR: low voltage side feeding path

Claims (9)

A first charging path having an AC / DC converter for charging a battery mounted on a vehicle from an external power source via a charging cable, a vehicle-mounted outlet into which a power plug of an AC device can be inserted, and supplying power to the vehicle-mounted outlet from the battery Detecting the connection state of the charging cable to the vehicle with respect to a plug-in vehicle having a first power supply path including a DC / AC converter and a second power supply path that supplies power to the in-vehicle outlet via the charging cable. A charging cable connection detection unit that performs power supply path switching control that selects either the first power supply path or the second power supply path and supplies power to the in-vehicle outlet based on a detection result by the charging cable connection detection unit. Prepared,
The electronic control device, wherein the power supply path switching control unit further automatically switches the power supply path based on a power supply state from the in-vehicle outlet to the AC device. The battery includes a high voltage battery that is charged through the first charging path, and a low voltage battery that is charged from the high voltage battery through a second charging path that includes a step-down circuit. Including a high voltage side power supply path for supplying power from the high voltage battery to the vehicle outlet, and a low voltage side power supply path for supplying power from the low voltage battery to the vehicle outlet.
The power supply path switching control unit is configured to detect the high voltage side power supply path, the low voltage side power supply path, or the second power supply path based on a detection result by the charging cable connection detection unit and a power supply state from the in-vehicle outlet to the AC device. The electronic control device according to claim 1, wherein the power supply is selected to supply power to the on-vehicle outlet.   The power supply path switching control unit selects one of the power supply paths and supplies power to the in-vehicle outlet when detecting that a power plug of an AC device is inserted into the in-vehicle outlet. Item 3. The electronic control device according to Item 1 or 2.   The electronic control device according to claim 1, wherein the power supply path switching control unit automatically switches the power supply path based on an operation state of the battery.   5. The electronic control device according to claim 1, wherein the power supply path switching control unit switches the power supply path based on a path switching signal input from a power supply path switching operation unit.   5. The power feeding path switching control unit switches the power feeding path in preference to the automatic switching based on a path switching signal input from a power feeding path switching operation unit. The electronic control device described.   The electronic control device according to claim 1, wherein the power supply path switching control unit switches to a power supply path other than the corresponding power supply path when detecting a failure of the battery or the power supply path.   The electronic control device according to claim 1, further comprising a display control unit configured to display a selection state of a power feeding path to the in-vehicle outlet on a display unit. A first charging path having an AC / DC converter for charging a battery mounted on a vehicle from an external power source via a charging cable, a vehicle-mounted outlet into which a power plug of an AC device can be inserted, and supplying power to the vehicle-mounted outlet from the battery For a plug-in vehicle including a first power supply path including a DC / AC converter and a second power supply path that supplies power to the in-vehicle outlet via the charging cable,
While detecting the connection state of the charging cable to the vehicle, detecting the power supply state from the in-vehicle outlet to the AC device, and based on the connection state and the power supply state, the first power supply path or the second power supply path A power supply path switching method of selecting any of the above and supplying power to the in-vehicle outlet.

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