JP2014060838A - Power supply system - Google Patents

Abstract

PROBLEM TO BE SOLVED: To secure desired power supply efficiency while preventing the configuration of an external power supply circuit from becoming complicated.SOLUTION: An inverter device 12 is connectable between a voltage regulator 23, which is capable of voltage conversion between a fuel cell stack 21 of a fuel cell vehicle 11 and a battery 22, and the battery 22. An ECU 61 of the fuel cell vehicle 11 stores correspondence information between the remaining capacity and the output voltage of the battery 22, and controls the remaining capacity of the battery 22 within a setting range of the remaining capacity of the battery 22 allowed in driving the fuel cell vehicle 11 or within a setting range of the remaining capacity of the battery 22 allowed in supplying power from the fuel cell vehicle 11 to the inverter device 12, such that the output voltage of the battery 22 matches a request voltage from the inverter device 12.

Description

  The present invention relates to a power feeding system.

  Conventionally, for example, a stationary power supply system including a second DC-DC converter and an inverter can be attached to and detached from a fuel cell vehicle including a fuel cell, a storage battery, and a first DC-DC converter. There is known a power supply system that supplies power from the output terminal on the power storage device side of the first DC-DC converter disposed between the inverter and the inverter via the second DC-DC converter (for example, Patent Document 1).

JP 2006-325392 A

By the way, according to the power supply system according to the related art, the voltage applied to the inverter of the stationary power supply system is controlled by the second DC-DC converter, and the stationary power supply is provided by including the second DC-DC converter. There arises a problem that the system configuration becomes complicated.
Furthermore, as a whole of the power supply system, the voltage conversion operation is performed by the two first and second DC-DC converters, so that the energy loss accompanying the voltage conversion increases and the efficiency of power supply decreases. Problems arise.

Further, in the power supply system according to the above-described prior art, the second DC-DC converter can be omitted. In this case, the output voltage of the storage battery of the fuel cell vehicle is applied to the inverter of the stationary power supply system. Only.
Thereby, for example, when the output voltage of the storage battery deviates from the operable voltage range of the inverter according to the state of the fuel cell vehicle, etc., the proper operation of the inverter becomes difficult, or the operating efficiency of the inverter May be significantly reduced.

  The present invention has been made in view of the above circumstances, and an object of the present invention is to provide a power feeding system capable of ensuring desired power feeding efficiency while preventing the configuration of an external power feeding circuit from becoming complicated.

  In order to solve the above problems and achieve the object, a power feeding system according to a first invention of the present invention is an electric vehicle (for example, the fuel cell vehicle 11 in the embodiment) and can be attached to and detached from the electric vehicle. A power supply system including an external power supply circuit (for example, the inverter device 12 in the embodiment), and the electric vehicle includes a power source (for example, the fuel cell stack 21 in the embodiment) and a power storage device ( For example, the battery 22) in the embodiment, the voltage converter that can convert the voltage between the power source and the power storage device (for example, the voltage regulator 23 in the embodiment), and the requirements of the external power supply circuit Request voltage acquisition means (for example, ECU 61 in the embodiment) for acquiring voltage, and control means (for example, ECU 61 in the embodiment), wherein the external power supply circuit includes the voltage conversion device and the power storage Dress The control means stores information on the correspondence relationship between the remaining capacity of the power storage device and the output voltage, and the output voltage of the power storage device is acquired by the required voltage acquisition means. The remaining capacity of the power storage device is controlled so as to match the required voltage.

  Further, in the power supply system according to the second aspect of the present invention, the required voltage acquisition means can acquire the required voltage by estimation, and the control means is capable of acquiring the remaining capacity that is allowed when the electric vehicle is traveling. Within the set range, the remaining capacity of the power storage device is controlled such that the output voltage of the power storage device matches the required voltage.

  Furthermore, in the power supply system according to the third aspect of the present invention, the required voltage acquisition means can acquire the required voltage from the external power supply circuit, and the control means transmits the electric vehicle to the external power supply circuit. 2. The remaining capacity of the power storage device is controlled so that an output voltage of the power storage device matches the required voltage within a set range of the remaining capacity allowed when power is supplied. Or the electric power feeding system of Claim 2.

  Furthermore, a power supply system according to a fourth aspect of the present invention includes a voltage detection unit (for example, battery voltage sensor 75 in the embodiment) that detects an output voltage of the power storage device, and a predetermined operation of the external power supply circuit. Voltage range acquisition means (e.g., ECU 61 in the embodiment) for acquiring a voltage range, and the control means is configured by the voltage detection means when the external power feeding circuit is connected to the electric vehicle. When the acquired output voltage of the power storage device deviates from the operating voltage range acquired by the voltage range acquisition means, power supply from the electric vehicle to the external power feeding circuit is prohibited, and the power storage The power supply is executed after the remaining capacity of the power storage device is controlled so that the output voltage of the device falls within the operating voltage range.

  Furthermore, a power supply system according to a fifth aspect of the present invention includes an electrical load (for example, auxiliary equipment in an embodiment) capable of supplying power from the power storage device, and the control means includes the voltage conversion device. The remaining capacity of the power storage device is controlled by controlling the output power of the power supply by controlling the power consumption of the electric load.

According to the power supply system of the first aspect of the present invention, the output voltage of the power storage device applied to the external power supply circuit is matched with the required voltage of the external power supply circuit by the control by the control means mounted on the electric vehicle. Therefore, the configuration of the external power feeding circuit can be prevented from becoming complicated.
Furthermore, even when the remaining capacity of the power storage device changes depending on, for example, changes in the state of the electric vehicle, the desired power supply efficiency and power supply time of the external power supply circuit are ensured by controlling the remaining capacity by the control means. can do.

According to the power supply system of the second aspect of the present invention, for example, electric power can be output without having to perform special control on the remaining capacity of the power storage device only to match the output voltage of the power storage device with the required voltage of the external power supply circuit. In the control of an appropriate remaining capacity executed while the vehicle is traveling, the output voltage of the power storage device can be matched with the required voltage of the external power feeding circuit while ensuring a desired traveling state of the electric vehicle.
Thus, for example, power supply from the electric vehicle to the external power supply circuit can be started immediately after the traveling of the electric vehicle is stopped, and power supply by the external power supply circuit can be started quickly.

According to the power supply system of the third aspect of the present invention, even when the output voltage of the power storage device and the required voltage of the external power supply circuit are different when the external power supply circuit is connected to the electric vehicle, the electric vehicle The output voltage can be matched with the required voltage while starting the power supply from the power supply to the external power supply circuit and maintaining the execution of the power supply.
Thereby, for example, power can be efficiently supplied from the electric vehicle in correspondence with a plurality of external power supply circuits having different required voltages, and the versatility and convenience of the electric vehicle can be improved.

  According to the power feeding system of the fourth aspect of the present invention, it is possible to prevent the proper operation of the external power feeding circuit from becoming difficult or the operating efficiency of the external power feeding circuit from being significantly reduced.

  According to the power feeding system of the fifth aspect of the present invention, the remaining capacity of the power storage device can be easily controlled by controlling the amount of charge from the power source to the power storage device or the amount of discharge from the power storage device to the electrical load. Can do.

It is a lineblock diagram of an electric supply system concerning an embodiment of the invention. It is a figure which shows the example of the setting range of the remaining capacity SOC allowable for the battery of the electric power feeding system which concerns on embodiment of this invention. It is a flowchart which shows operation | movement of the electric power feeding system which concerns on embodiment of this invention.

  Hereinafter, a power supply system according to an embodiment of the present invention will be described with reference to the accompanying drawings.

  A power feeding system 10 according to the present embodiment is configured to include a fuel cell vehicle 11 and an inverter device 12 provided separately from the fuel cell vehicle 11 as shown in FIG. Electric power is supplied to an external load 13 such as an AC device.

The fuel cell vehicle 11 includes, for example, a power supply port 11a connected to the power source of the fuel cell vehicle 11 in the trunk room at the rear of the vehicle, and the inverter device 12 can be mounted in the trunk room.
The inverter device 12 includes, for example, a power supply connector 12 a that is detachably fitted to a power supply port 11 a provided in the fuel cell vehicle 11.
The power supply connector 12a includes, for example, a plurality of connector pins that can be electrically connected to a plurality of terminals provided in the power supply port 11a.

  In the fuel cell vehicle 11 and the inverter device 12, the power supply connector 12a of the inverter device 12 is fitted to the power supply port 11a of the fuel cell vehicle 11, and the power supply connector 12a is connected to a plurality of terminals of the power supply port 11a along with this fitting. Electrical connection is established by connecting a plurality of connector pins.

  The inverter device 12 includes, for example, a power output unit 12b that can be electrically connected to the external load 13, and converts the DC power of the fuel cell vehicle 11 input from the power supply connector 12a into AC power. Later AC power can be supplied from the power output unit 12b to the external load 13.

  The fuel cell vehicle 11 includes, for example, a fuel cell stack 21, a battery 22, a voltage regulator (VCU) 23, a travel motor 24, a power drive unit (PDU) 25, an air pump 26, and an air pump inverter (APINV). ) 27, downverter (DV) 28, 12V battery 29, battery precharge unit 30 and battery contactor unit 31, external power supply precharge unit 32 and external power supply contactor unit 33, and control device 34. Configured.

  The fuel cell stack 21 includes, for example, a solid polymer electrolyte membrane composed of a cation exchange membrane, a fuel electrode (anode) composed of an anode catalyst and a gas diffusion layer, and an oxygen electrode (cathode) composed of a cathode catalyst and a gas diffusion layer. And an electrolyte electrode structure sandwiched between a plurality of fuel cell units sandwiched between a pair of separators. And the laminated body of the fuel cell is pinched | interposed from the both sides of the lamination direction by a pair of end plate.

Air, which is an oxidant gas (reaction gas) containing oxygen, can be supplied from the air pump 26 to the cathode of the fuel cell stack 21, and a fuel tank (reaction gas) containing hydrogen is a high-pressure hydrogen tank (not shown) to the anode. ) Or the like.
Then, during the supply of the reaction gas, hydrogen ionized by the catalytic reaction on the anode catalyst of the anode moves to the cathode through the moderately humidified solid polymer electrolyte membrane, and the electrons generated along with this movement Is taken out to an external circuit to generate DC power. At this time, at the cathode, hydrogen ions, electrons and oxygen react to produce water.

  The battery 22 is, for example, a high-voltage lithium ion type secondary battery, and is connected to the fuel cell stack 21 via a voltage regulator 23.

The voltage regulator 23 includes, for example, a DC-DC converter and the like, and performs voltage regulation for power exchange between the fuel cell stack 21 and the battery 22.
The voltage regulator 23 includes, for example, a smoothing capacitor 23a on the battery 22 side.

The traveling motor 24 is, for example, a U-phase, V-phase, and W-phase three-phase DC brushless motor, and is capable of powering operation and power generation operation according to control by the power drive unit 25.
For example, the traveling motor 24 performs a power running operation by applying an alternating phase current to the coils of each phase, and drives the drive wheels W via the transmission (T / M) 24a. Further, when the fuel cell vehicle 11 is decelerated, a driving force is transmitted from the driving wheel side to perform a power generation operation (regenerative operation) and output generated power (regenerative power).

  The power drive unit 25 includes, for example, a bridge circuit formed by bridge connection using a plurality of switching elements such as transistors, and an inverter using pulse width modulation (PWM) including a smoothing capacitor.

  For example, during the power running operation of the traveling motor 24, the inverter switches on (conductive) / off (blocked) each switching element that forms a pair for each phase based on the PWM signal output from the control device 34. As a result, the DC power supplied from the battery 22 via the voltage regulator 23 or the DC power supplied from the fuel cell stack 21 is converted into three-phase AC power and energized to the coils of each phase of the traveling motor 24. Are sequentially commutated to energize each phase current of AC.

  On the other hand, for example, during power generation operation of the traveling motor 24, the inverter turns each switching element on (conductive) / off (cut off) in accordance with a gate signal synchronized based on the rotation angle of the rotor of the traveling motor 24. The AC generated power output from the traveling motor 24 is converted into DC power.

  The air pump 26 is, for example, an electric compressor including a pump driving motor (not shown) that is rotationally driven by AC power output from the air pump inverter 27. The air pump 26 takes in air from the outside and compresses the compressed air. To the cathode of the fuel cell stack 21 as a reaction gas.

  The air pump inverter 27 is, for example, a pulse width modulation (PWM) PWM inverter or the like, and based on a control signal output from the control device 34, direct current power or fuel supplied from the battery 22 via the voltage regulator 23. The pump drive motor of the air pump 26 is rotationally driven by the DC power supplied from the battery stack 21 to control the rotation speed of the pump drive motor.

  The downverter 28 includes, for example, a DC-DC converter or the like, and converts a high voltage between the terminals of the battery 22 or a high voltage applied from the fuel cell stack 21 via the voltage regulator 23 to a predetermined low voltage (12 V). The 12V battery 29 is charged with the predetermined voltage power after step-down.

  The 12V battery 29 outputs, for example, low-voltage predetermined voltage power for driving an electric load including the control device 34 and various auxiliary machines.

The battery precharge unit 30 and the battery contactor unit 31 are provided between the battery 22, the voltage regulator 23, and the downverter 28, for example.
The battery precharge unit 30 includes, for example, a precharge contactor 41 and a precharge resistor 42 connected in series.

The battery contactor unit 31 includes, for example, a positive battery contactor 43 connected to the positive terminal of the battery 22 in the high voltage line (HV +) on the positive electrode side of the fuel cell vehicle 11 and a battery 22 in the high voltage line (HV−) on the negative electrode side. And a negative electrode side battery contactor 44 connected to the negative electrode terminal.
The battery precharge unit 30 is connected to both ends of the positive battery contactor 43 (that is, in parallel to the positive battery contactor 43).

The external power supply precharge unit 32 and the external power supply contactor unit 33 are provided, for example, between the battery precharge unit 30 and the battery contactor unit 31 and the power supply port 11a.
The external power feeding precharge unit 32 includes, for example, a precharge contactor 51 and a precharge resistor 52 connected in series.

The external power supply contactor 33 includes, for example, a positive-side external power supply contactor 53 connected to the positive-side battery contactor 43 in the positive-side high-voltage line (HV +) of the fuel cell vehicle 11 and a negative-side high-voltage line (HV−). A negative-side external power supply contactor 54 connected to the negative-side battery contactor 44.
The external power supply precharge unit 32 is connected to both ends of the positive electrode side external power supply contactor 53 (that is, in parallel to the positive electrode side external power supply contactor 53).

  And each contactor 41,43,44,51,53,54 can switch conduction | electrical_connection and interruption | blocking based on the control signal output from the control apparatus 34, for example.

  The control device 34 includes an ECU (Electronic Control Unit) 61 configured by an electronic circuit such as a CPU (Central Processing Unit).

The ECU 61 controls the power running operation and the power generation operation of the traveling motor 24 by controlling the power conversion operation of the power drive unit 25, for example.
For example, the ECU 61 calculates the target torque of the travel motor 24 based on signals output from various sensors, switches, and the like so that the torque actually output from the travel motor 24 matches the target torque. The feedback control for the current supplied to the traveling motor 24 is performed.

  The ECU 61 controls the reaction to the fuel cell stack 21 by controlling the power conversion operation of the air pump inverter 27, the opening and closing of various valves provided in the reaction gas flow path, the voltage adjustment operation of the voltage regulator 23, and the like. The gas supply and the power generation amount (generated power) of the fuel cell stack 21 are controlled.

  The ECU 61 controls, for example, monitoring and protection of the high-voltage equipment system including the battery 22 based on, for example, signals output from various sensors and switches, and further, a signal output from the inverter control device 82.

  For example, the ECU 61 uses the fuel cell vehicle 11 based on command signals such as an ignition switch 71 and a power switch 72 and detection signals such as a speed sensor 73, an accelerator pedal opening sensor 74, and a brake pedal switch (not shown). Control the operating state of

The ignition switch 71 outputs a command signal (IGSW) instructing start and stop of the fuel cell vehicle 11 according to the operation of the driver.
Further, the power switch 72 outputs a command signal (PSW) instructing activation of the fuel cell stack 21 (for example, activation of the air pump 26, etc.) according to the operation of the driver.

The speed sensor 73 detects the speed of the fuel cell vehicle 11.
The accelerator pedal opening sensor 74 detects the stroke amount (accelerator opening) of the accelerator pedal according to the depression of the accelerator pedal by the driver.
The brake pedal switch detects whether the driver has operated the brake pedal.

Further, for example, the ECU 61 detects each detection signal of the battery voltage sensor 75 that detects the voltage (battery voltage) VB between the terminals of the battery 22, the battery current sensor 76 that detects the current IB, and the battery temperature sensor 77 that detects the temperature TB. Based on this, various state quantities such as remaining capacity SOC (State Of Charge) are calculated.
Then, based on the various state quantities calculated, the battery precharge unit 30 and the battery contactor unit 31 are controlled to be turned on and off, thereby controlling the charging and discharging of the battery 22.

  Note that the ECU 61 is connected to a meter 78 made up of instruments for displaying various states of the fuel cell vehicle 11 together with various sensors and switches.

Further, the ECU 61 controls the power feeding to the inverter device 12 connected to the fuel cell vehicle 11 and the power conversion operation of the inverter device 12, and detects whether there is an abnormality in the inverter device 12.
For example, the ECU 61 controls power supply to the inverter device 12 by controlling conduction and interruption of the external power supply precharge unit 32 and the external power supply contactor unit 33.

  For example, the inverter device 12 includes at least one inverter 81 and an inverter control device 82.

The inverter 81 includes, for example, a bridge circuit formed by a bridge connection using a plurality of switching elements such as transistors and a smoothing capacitor. Based on a switching command signal output from the inverter control device 82, each switching element is turned on (conducted). ) / Off (blocking). Thus, direct current supplied from the power source of the fuel cell vehicle 11 (for example, the fuel cell stack 21 and the battery 22) via the power supply connector 12a fitted to the power supply port 11a provided in the fuel cell vehicle 11. The power can be converted into AC power, and the converted AC power can be supplied to the external load 13.
The inverter 81 is connected to the external power supply contactor unit 33 through, for example, a smoothing capacitor 81a.

  The inverter control device 82 is operated by, for example, control power supplied from the ECU 61 of the fuel cell vehicle 11, and in response to various command signals output from the ECU 61, the inverter 81 and the power supply connector 12 a electromagnetically. The power supply to the external load 13 is controlled by controlling the operation of the lock 83.

Note that the positive and negative input terminals of the inverter 81 are connected to the power supply port 11 a of the fuel cell vehicle 11 by the power supply connector 12 a of the inverter device 12, so that the fuel cell vehicle 11 is connected via the electromagnetic lock 83. Can be connected to the high voltage lines (HV +) and (HV−) on the positive electrode side and the negative electrode side.
The electromagnetic lock 83 is controlled between the input terminal on the positive electrode side and the negative electrode side of the inverter 81 and the high voltage lines (HV +) and (HV−) on the positive electrode side and the negative electrode side of the fuel cell vehicle 11 under the control of the inverter control device 82. Switch between electrical connection and disconnection.

  Moreover, the inverter control apparatus 82 outputs the signal of the information which concerns on the state of the inverter apparatus 12 based on the detection signal of the inverter voltage sensor 84 which detects the input voltage (inverter voltage VI) of the inverter 81, for example.

For example, the inverter control device 82 is connected to each connector pin provided in the power supply connector 12a.
The power supply port 11a of the fuel cell vehicle 11 includes terminals connected to the connector pins of the power supply connector 12a, and the ECU 61 of the control device 34 is connected to the terminals of the power supply port 11a through appropriate signal lines. Yes.
Thus, the ECU 61 of the fuel cell vehicle 11 and the inverter control device 82 are fitted with the power supply connector 12a of the inverter device 12 in the power supply port 11a of the fuel cell vehicle 11, and a plurality of the power supply ports 11a are associated with this fitting. In the state where the plurality of connector pins of the power supply connector 12a are connected to the terminals, various signals can be transmitted and received.

  In addition, the signal transmitted / received between ECU61 of the fuel cell vehicle 11 and the inverter control apparatus 82 is a signal instruct | indicating the output request | requirement (external power supply request | requirement) of the electric power from the inverter apparatus 12 to the external load 13, for example, and an inverter A signal instructing permission to output power from the device 12 to the external load 13, a signal instructing permission and prohibition of power feeding from the fuel cell vehicle 11 to the inverter device 12, and fitting between the power feeding port 11a and the power feeding connector 12a A signal indicating presence / absence, a signal of a control voltage supplied from the ECU 61 to the inverter control device 82, a signal of a detection result of the inverter voltage (detected value) VI detected by the inverter voltage sensor 84, For example, a signal indicating a required voltage, a signal indicating a predetermined operating voltage range of the inverter device 12, and the like.

The required voltage of the inverter device 12 is, for example, an input voltage required for the efficiency of the operation of the inverter device 12 (for example, a voltage conversion operation for outputting a predetermined voltage to the external load 13) to be a predetermined value or more. It is.
Further, the predetermined operating voltage range of the inverter device 12 is, for example, an input voltage range in which the inverter device 12 can properly operate.

  The power feeding system 10 according to the present embodiment has the above-described configuration. Next, the operation of the power feeding system 10, particularly the operation of the ECU 61 will be described.

The ECU 61 stores, for example, information on the correspondence relationship between the remaining capacity SOC of the battery 22 and the battery voltage VB. The remaining capacity SOC of the battery 22 is set so that the battery voltage VB matches the required voltage of the inverter device 12. To control.
The correspondence relationship between the remaining capacity SOC of the battery 22 and the battery voltage VB is, for example, that the remaining capacity SOC changes in an increasing trend as the battery voltage VB increases.

  For example, the ECU 61 can estimate the required voltage of the inverter device 12 in a state where the inverter device 12 is not connected to the fuel cell vehicle 11 (for example, when the fuel cell vehicle 11 is traveling). For example, the ECU 61 controls the remaining capacity SOC of the battery 22 so that the battery voltage VB matches the required voltage within the set range of the remaining capacity SOC allowed when the fuel cell vehicle 11 is traveling.

  For example, the ECU 61 can obtain the required voltage of the inverter device 12 from the inverter device 12 in a state where the inverter device 12 is connected to the fuel cell vehicle 11 (for example, when the fuel cell vehicle 11 is stopped). The ECU 61, for example, is within a set range of the remaining capacity SOC that is allowed when power is supplied from the fuel cell vehicle 11 to the inverter device 12 (that is, when external power is supplied from the inverter device 12 to the external load 13). , The remaining capacity SOC of the battery 22 is controlled so that the battery voltage VB matches the required voltage.

  Note that the setting range of the remaining capacity SOC that is allowed when the fuel cell vehicle 11 travels or when power is supplied from the fuel cell vehicle 11 to the inverter device 12 is necessary for protecting the battery 22, for example, as shown in FIG. The upper limit remaining capacity SOCH and the lower limit remaining capacity SOCL are set.

  For example, the allowable SOC range during travel of the fuel cell vehicle 11 is necessary for the upper limit remaining capacity SOCHa that is smaller than the upper limit remaining capacity SOCH by a predetermined first margin Ma, the predetermined first margin Ma that is lower than the lower limit remaining capacity SOCL, and during traveling. The lower limit remaining capacity SOCLa which is larger by the discharge amount D of the battery 22 is set.

  Further, for example, the allowable SOC range at the time of power supply from the fuel cell vehicle 11 to the inverter device 12 is the upper limit remaining capacity SOCH by a predetermined second margin Mb that is larger than the predetermined first margin Ma when the fuel cell vehicle 11 is traveling. Is set by an upper limit remaining capacity SOCHb smaller by a predetermined second margin Mb and a lower limit remaining capacity SOCLb larger by a predetermined second margin Mb than the lower limit remaining capacity SOCL.

  The ECU 61 controls the battery 22 by, for example, controlling the output power of the fuel cell stack 21 by the voltage regulator 23 or by controlling the power consumption of various auxiliary devices such as the traveling motor 24 and the air conditioner. Charging and discharging and the remaining capacity SOC are controlled.

  For example, the ECU 61 can acquire a predetermined operating voltage range of the inverter device 12, and when the battery voltage VB deviates from the predetermined operating voltage range of the inverter device 12, from the fuel cell vehicle 11. After the power supply to the inverter device 12 and the power supply from the inverter device 12 to the external load 13 are prohibited and the remaining capacity SOC of the battery 22 is controlled so that the battery voltage VB is within a predetermined operating voltage range, Execute the supply.

Below, an example of operation | movement of ECU61 is demonstrated.
First, for example, in step S01 shown in FIG. 3, it is determined whether or not the required voltage of the inverter device 12 has been acquired.
If this determination is “NO”, the flow proceeds to step S 02.
On the other hand, if this determination is “YES”, the flow proceeds to step S 04 described later.

In step S02, the normal target SOC is calculated as normal processing for controlling the state of the battery 22 in accordance with the state of the fuel cell vehicle 11, for example.
In step S03, control is performed so that the remaining capacity SOC of the battery 22 matches the target SOC, and the process proceeds to the end.

In step S04, the target SOC required for battery voltage VB (output voltage of battery 22) to match the required voltage of inverter device 12 is calculated.
In step S05, it is determined whether an external power supply request has been acquired.
If this determination is “YES”, the flow proceeds to step S 08 described later.
On the other hand, if this determination is “NO”, the flow proceeds to step S 06.

Then, in step S06, it is determined that the fuel cell vehicle 11 is traveling, and the target SOC is set to a remaining capacity SOC setting range allowed when the fuel cell vehicle 11 is traveling, for example, the fuel cell vehicle 11 is traveling. Restrict to a value within the allowable allowable SOC range.
In step S07, control is performed so that the remaining capacity SOC of the battery 22 matches the target SOC, and the process proceeds to the end.

Further, in step S08, the target SOC is restricted to a value within a setting range of the remaining capacity SOC that is allowed at the time of external power feeding, for example, a permissible SOC range that allows external power feeding.
In step S09, it is determined whether or not battery voltage VB is within a predetermined operating voltage range of inverter device 12.
If this determination is “YES”, the flow proceeds to step S10.
On the other hand, if this determination is “YES”, the flow proceeds to step S12.

In step S10, power supply from the fuel cell vehicle 11 to the inverter device 12 and power supply from the inverter device 12 to the external load 13 are permitted.
In step S11, the output power of the fuel cell stack 21 is controlled by the voltage regulator 23 so that the remaining capacity SOC of the battery 22 matches the target SOC, or from the inverter device 12 to the external load 13 The remaining capacity SOC of the battery 22 is controlled by controlling the power supplied to the battery, and the process proceeds to the end.

In step S12, power supply from the fuel cell vehicle 11 to the inverter device 12 and power supply from the inverter device 12 to the external load 13 are prohibited.
In step S13, the battery 22 is mounted on the fuel cell vehicle 11 by controlling the output power of the fuel cell stack 21 with the voltage regulator 23 so that the remaining capacity SOC of the battery 22 matches the target SOC. By controlling the power consumption of the various auxiliary machines, the remaining capacity SOC of the battery 22 is controlled, and the process proceeds to the end.

As described above, according to the power supply system 10 according to the present embodiment, the battery voltage VB applied to the inverter device 12 matches the required voltage of the inverter device 12 by the control of the ECU 61 mounted on the fuel cell vehicle 11. Can be made. Thereby, compared with the case where the structure for voltage adjustment is provided in the inverter apparatus 12, for example, the structure of the inverter apparatus 12 can be prevented from becoming complicated, and the inverter apparatus 12 can be reduced in size.
Furthermore, even if the remaining capacity SOC of the battery 22 changes according to, for example, a change in the state of the fuel cell vehicle 1, the desired power supply efficiency and power supply of the inverter device 12 can be performed by controlling the remaining capacity SOC by the ECU 61. Time can be secured.

Further, in the control of the appropriate remaining capacity SOC executed while the fuel cell vehicle 11 is traveling, the battery voltage VB is made to match the required voltage of the inverter device 12 while ensuring the desired traveling state of the fuel cell vehicle 11. Can do.
Thereby, for example, power supply from the fuel cell vehicle 11 to the inverter device 12 can be started immediately after the traveling of the fuel cell vehicle 11 is stopped, and power supply from the inverter device 12 to the external load 13 can be started quickly. Can do.

Further, for example, even when the battery voltage VB and the required voltage of the inverter device 12 are different when the inverter device 12 is connected to the fuel cell vehicle 11, power supply from the fuel cell vehicle 11 to the inverter device 12 and The power supply from the inverter device 12 to the external load 13 is started, and the battery voltage VB can be matched with the required voltage while maintaining the power supply.
Thus, for example, power can be supplied quickly and efficiently from the fuel cell vehicle 11 corresponding to a plurality of inverter devices 12 having different required voltages, and the versatility and convenience of the fuel cell vehicle 11 can be improved. Yes.

  Further, when the battery voltage VB deviates from the operating voltage range of the inverter device 12, by controlling the remaining capacity SOC so that the battery voltage VB is within the operating voltage range, the power supply is executed. Thus, the inverter device 12 can be properly operated, and a desired operation efficiency of the inverter device 12 can be ensured.

In the above-described embodiment, the ECU 61 of the fuel cell vehicle 11 and the inverter control device 82 are capable of wireless communication with, for example, an external communication device (for example, a wireless communication portable terminal). Also good. In this case, the ECU 61 and the inverter control device 82 can be controlled by a control signal transmitted from an external communication device.
For example, the ECU 61 receives the required voltage and a predetermined operating voltage range of the inverter device 12 that are wirelessly transmitted from a portable terminal or the like so that the battery voltage VB falls within the predetermined operating voltage range. The remaining capacity SOC of the battery 22 can be controlled such that VB matches the required voltage of the inverter device 12.

In the above-described embodiment, the power feeding system 10 includes the fuel cell vehicle 11. However, the present invention is not limited to this, and another electric vehicle such as a hybrid vehicle may be included instead of the fuel cell vehicle 11. Good.
Accordingly, the vehicle-side power source that supplies power to the inverter device 12 may be a capacitor mounted on an electric vehicle, a generator driven by an internal combustion engine, or the like, in addition to the fuel cell stack 21 and the battery 22.

  The present embodiment described above shows an example in carrying out the present invention, and it goes without saying that the present invention is not construed as being limited to the above-described embodiment.

10 Power Supply System 11 Fuel Cell Vehicle (Electric Vehicle)
12 Inverter device (external power supply circuit)
21 Fuel cell stack (power supply)
22 Battery (power storage device)
23 Voltage regulator (voltage converter)
24 driving motor 34 control device 61 ECU (control means, required voltage acquisition means, voltage range acquisition means)
75 Battery voltage sensor (voltage detection means)

Claims (5)

A power supply system comprising an electric vehicle and an external power supply circuit detachable from the electric vehicle,
The electric vehicle is
Power supply,
A power storage device;
A voltage conversion device capable of voltage conversion between the power source and the power storage device;
Request voltage acquisition means for acquiring a request voltage of the external power supply circuit;
Control means,
The external power feeding circuit is connectable between the voltage conversion device and the power storage device,
The control unit stores information on a correspondence relationship between the remaining capacity of the power storage device and an output voltage, and makes the output voltage of the power storage device coincide with the required voltage acquired by the required voltage acquisition unit. A power supply system that controls a remaining capacity of the power storage device. The required voltage acquisition means can acquire the required voltage by estimation,
The control means controls the remaining capacity of the power storage device such that an output voltage of the power storage device matches the required voltage within a set range of the remaining capacity allowed when the electric vehicle is traveling. The power feeding system according to claim 1. The required voltage acquisition means can acquire the required voltage from the external power supply circuit,
The control means is configured so that an output voltage of the power storage device matches the required voltage within a set range of the remaining capacity that is allowed when power is supplied from the electric vehicle to the external power feeding circuit. The power supply system according to claim 1, wherein the remaining capacity of the power supply system is controlled. Voltage detecting means for detecting an output voltage of the power storage device;
Voltage range acquisition means for acquiring a predetermined operating voltage range of the external power feeding circuit,
When the external power feeding circuit is connected to the electric vehicle, the control unit is configured to output an output voltage of the power storage device acquired by the voltage detection unit from the operating voltage range acquired by the voltage range acquisition unit. When deviating, the power supply from the electric vehicle to the external power feeding circuit is prohibited, and the remaining capacity of the power storage device is controlled so that the output voltage of the power storage device is within the operating voltage range. The power supply system according to any one of claims 1 to 3, wherein the power supply is executed later. An electric load capable of supplying power from the power storage device,
The said control means controls the remaining capacity of the said electrical storage apparatus by controlling the output electric power of the said power supply by the said voltage converter, or controlling the electric power consumption of the said electrical load. The power feeding system according to any one of claims 1 to 4.

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