Vehicle

Abstract

The present invention provides a vehicle that can suppress repeated charging and discharging of a battery when obtaining power from a power acquisition unit and using an electrical load simultaneously. The vehicle includes a battery that stores power for driving, a power acquisition unit that can obtain power for charging the battery from outside the vehicle, a relay that switches the connection or disconnection between the battery and the wires of the vehicle, a power supply function unit that can receive power from the wires and supply a power supply voltage to devices other than the driving motor, and a control unit that controls the transmission of power via the wires. Moreover, in a first condition (Steps S1 and S2 are YES) where power is transmitted from the power acquisition unit to the battery and the power supply function unit continues to operate or starts up, the control unit can switch the power transmission mode to a direct transmission mode (Step S6) in which the relay is in a cut-off state and power is transmitted from the power acquisition unit to the power supply function unit.

Description

Technical Field

[0001] The present invention relates to a vehicle including a battery that stores electric power for traveling and a power acquisition unit that can acquire charging power for the battery from outside the vehicle. Background Art

[0002] Vehicles such as EV (Electric Vehicle) or PHEV (Plug-in Hybrid Electric Vehicle) include a battery that stores electric power for traveling and a power acquisition unit that can acquire charging power for the battery from outside. In recent years, in such vehicles, a convenient function of supplying a power supply voltage from the battery power to various electronic devices has been put into practical use. With the convenient function, for example, it is possible to drive an electric air conditioner of the vehicle or supply an AC power supply voltage from a socket provided in the vehicle compartment. By supplying the AC power supply voltage, household appliances can be used in the vehicle compartment.

[0003] In Patent Document 1, a vehicle is shown as a technology related to the present invention: when charging the battery and using an electrical load at the same time, the system main relay is switched off under predetermined conditions, and the battery is disconnected from the wire. In the vehicle of Patent Document 1, when conditions such as a low state of charge (SOC) of the battery and a charging current of the battery being 0 or a current being output from the battery are satisfied, the system main relay is turned off to prevent over-discharge of the battery.

[0004] Prior Art Documents

[0005] Patent Documents

[0006] Patent Document 1: International Publication No. 2012 / 081104 Summary of the Invention

[0007] Technical Problem

[0008] Generally, a charging system that charges a vehicle's battery using an external power source stops obtaining charging power from the external power source when the battery is fully charged. In a vehicle equipped with convenience functions, it is assumed that the convenience functions are used before, during, or after charging the battery. In such an assumption, after stopping the supply of charging power from the external power source when the battery is fully charged, the charging rate of the battery decreases due to the power consumption of the convenience functions. And when the charging rate of the battery becomes below a predetermined value, the acquisition of power from the external power source is started again until the battery is fully charged. In such a control method, if the convenience functions are used for a long time during the charging process, it will cause repeated discharging and charging of the battery, promoting battery degradation. In the technology of Patent Document 1, the same control is also considered when the charging rate of the battery is high.

[0009] An object of the present invention is to provide a vehicle that can suppress repeated charging and discharging of a battery when simultaneously obtaining power from a power acquisition unit and using an electrical load.

[0010] Technical solution

[0011] The invention of the first aspect is a vehicle, characterized by comprising:

[0012] A battery that stores power for driving;

[0013] A power acquisition unit that can obtain power for charging the battery from outside the vehicle;

[0014] A relay that switches the connection or disconnection between the battery and the vehicle's electrical wires;

[0015] A power supply function unit that can receive power from the electrical wires and supply a power supply voltage to devices other than the driving motor; and

[0016] A control unit that controls the transmission of power via the electrical wires,

[0017] In a first situation where power is transmitted from the power acquisition unit to the battery and the power supply function unit continues to operate or starts up, the control unit can switch the power transmission mode to a direct transmission mode, which is a mode in which the relay is in a cut-off state and power is transmitted from the power acquisition unit to the power supply function unit.

[0018] The invention of the second aspect is based on the vehicle according to the first aspect, and is characterized by comprising:

[0019] A battery that stores power for driving;

[0020] A power acquisition unit that can obtain power for charging the battery from outside the vehicle;

[0021] A relay that switches or cuts off the connection between the battery and the vehicle's electrical wires;

[0022] A power supply function unit that can receive power from the electrical wires and supply a power supply voltage to devices other than the driving motor; and

[0023] A control unit that controls the transmission of power via the electrical wires,

[0024] When the power supply function unit is operated by the power of the battery, in a second condition where power can be obtained from the power acquisition unit, the control unit can switch the power transmission mode to a direct transmission mode, which is a mode in which the relay is in an off state and power is transmitted from the power acquisition unit to the power supply function unit.

[0025] The invention of the third mode is based on the vehicle described in the first mode, and is characterized in that

[0026] After performing a current adjustment process of adjusting the current flowing in the battery in a manner that makes it smaller, the control unit performs the switching to the direct transmission mode.

[0027] The invention of the fourth mode is based on the vehicle described in the second mode, and is characterized in that

[0028] After performing a current adjustment process of adjusting the current flowing in the battery in a manner that makes it smaller, the control unit performs the switching to the direct transmission mode.

[0029] The invention of the fifth mode is based on the vehicle described in the third mode or the fourth mode, and is characterized in that

[0030] The current adjustment process includes an output adjustment of a power supply device connected to the power acquisition unit.

[0031] The invention of the sixth mode is based on the vehicle described in the third mode or the fourth mode, and is characterized in that

[0032] The current adjustment process includes a drive adjustment of a device connected to the electrical wires.

[0033] The invention of the seventh mode is based on the vehicle described in any one of the first mode to the fourth mode, and is characterized in that

[0034] In the first condition or the second condition, and when the power that can be obtained from the power acquisition unit is less than the power requested by the power supply function unit, the control unit switches the power transmission mode to the direct transmission mode.

[0035] The invention of the eighth aspect is based on the vehicle described in the seventh aspect, and is characterized in that

[0036] in the first state or the second state, and when the charging rate of the battery is equal to or higher than a predetermined threshold, the control unit switches the power transmission mode to the direct transmission mode.

[0037] The invention of the ninth aspect is based on the vehicle described in any one of the first to fourth aspects, and is characterized in that

[0038] the vehicle is provided with a mode setting unit capable of selecting a control mode of the vehicle,

[0039] in the first state or the second state, and when the control mode is a predetermined mode, the control unit switches the power transmission mode to the direct transmission mode.

[0040] Technical effects

[0041] According to the present invention, when acquiring power from the power acquisition unit and supplying the power voltage to the power supply function unit at the same time, the control unit can switch the power transmission mode to the direct transmission mode. Moreover, by this switching, the battery is disconnected from the wire, and power is transmitted from the power acquisition unit to the power supply function unit. Therefore, through the power use of the power supply function unit and the acquisition of power from the power acquisition unit, it is possible to suppress the repeated discharge and charging of the battery. Description of the drawings

[0042] Figure 1 is a block diagram showing a vehicle according to an embodiment of the present invention.

[0043] Figure 2 is a flowchart showing a process flow of a deterioration suppression mode executed by a vehicle control unit according to an embodiment.

[0044] Figure 3 is a timing chart showing the states of respective parts when there is a use request for the power supply function unit during a charging process in a vehicle according to an embodiment.

[0045] Figure 4 is a timing chart showing the states of respective parts when there is a use request for the power supply function unit during a charging process in a vehicle according to a comparative example.

[0046] Symbol description

[0047] 1 Vehicle

[0048] 11 Battery

[0049] 13 Traveling motor

[0050] 15 Vehicle control unit

[0051] 19 Mode setting unit

[0052] 20 Equipment operation unit

[0053] 21 Inverter for air conditioner

[0054] 23 Inverter for vehicle

[0055] 25 Power supply function unit

[0056] 31 Charging connector

[0057] 33 Communication unit

[0058] 34 Charging control unit

[0059] 101 Charging plug

[0060] Lb Electric wire

[0061] Rs System main relay

[0062] Rpr Pre-charge relay

[0063] R1 Pre-charge element

[0064] Rj Relay for charging Detailed implementation manners

[0065] Hereinafter, with reference to the accompanying drawings, embodiments of the present invention will be described in detail.

[0066] Figure 1 It is a block diagram of a vehicle showing an embodiment of the present invention. The vehicle 1 of the embodiment of the present invention is an automobile such as an EV or a PHEV. The vehicle 1 includes: a battery 11 that stores electric power for traveling; a traveling motor 13 that drives drive wheels; an inverter 12 that converts electric power between the battery 11 and the traveling motor 13; and a BCU (Battery Control Unit) 14 that manages the state of the battery 11. The battery 11 outputs a high voltage for driving the traveling motor 13 and can be called a high-voltage battery. The battery 11 is a secondary battery such as a lithium-ion storage battery or a nickel-metal hydride storage battery, for example.

[0067] The vehicle 1 also includes a system main relay Rs (a relay Rp on the anode side and a relay Rn on the cathode side), a pre-charge relay Rpr, and a pre-charge element R1. The battery 11 is connected to the wire Lb via the system main relay Rs. When the system main relay Rs is in the off state, the battery 11 and the wire Lb are electrically disconnected so that no current flows between the battery 11 and the wire Lb. When the system main relay Rs is in the connected state, the battery 11 and the wire Lb are electrically connected so that current flows between the battery 11 and the wire Lb. The system main relay Rs being in the connected state means that both the relay Rp on the anode side and the relay Rn on the cathode side are in the conductive state. The system main relay Rs being in the off state means that both or either one of the relay Rp on the anode side and the relay Rn on the cathode side are in the off state. The system main relay Rs is an example of the relay of the present invention.

[0068] When the voltage difference between the wire Lb and the battery 11 is large, the pre-charge relay Rpr and the pre-charge element (e.g., resistor) R1 can pre-charge the input capacitance of the wire Lb or an electronic device connected thereto, causing the voltage of the wire Lb to rise slowly.

[0069] The vehicle 1 also includes a power supply function unit 25 that supplies a power supply voltage to electronic devices other than the driving motor 13. In the power supply function unit 25, as an example, it includes an air conditioner inverter 21 and an in-vehicle inverter 23, etc. The air conditioner inverter 21 converts the power transmitted from the wire Lb and outputs driving power to the air conditioner 22 (such as a compressor). The in-vehicle inverter 23 converts the power transmitted from the wire Lb into an AC power supply voltage and outputs it to the in-vehicle socket 24. The passengers of the vehicle 1 can connect, for example, household appliances to the in-vehicle socket 24 and use them by operating the in-vehicle inverter 23.

[0070] It should be noted that instead of or in addition to the in-vehicle socket 24, an out-vehicle socket that can be used for electrical appliances can be connected to the in-vehicle inverter 23 near the vehicle 1 (outside the vehicle compartment). Or, the power supply function unit 25 can also include a connector and a relay that can connect an external inverter instead of the in-vehicle inverter 23. In this case, by connecting the external inverter to the connector and turning on the relay, under the control of the vehicle control unit 15, power is supplied from the wire Lb to the inverter, and an AC power supply voltage is output from the external inverter to the out-vehicle socket. With such a configuration, the user of the vehicle 1 can use household appliances near the vehicle 1.

[0071] The vehicle 1 is also equipped with a vehicle control unit 15 that controls the driving and each part of the vehicle. The vehicle control unit 15 can be composed of one ECU (Electronic Control Unit), or can be composed of multiple ECUs that are linked to each other. The ECU has a CPU (Central Processing Unit), a storage unit that stores the control program and control data executed by the CPU, and a RAM (Random Access Memory) for the CPU to expand data.

[0072] For example, the vehicle control unit 15 drives the inverter 12 according to the operation of the driving operation unit, so that the driving motor 13 runs with power or regeneratively runs. Thus, the driving of the vehicle 1 corresponding to the driving operation is realized. In addition, the vehicle control unit 15 performs switching control of the system main relay Rs and the pre-charge relay Rpr, control of the start and stop of each component of the power supply function unit 25, and input control from the passenger via the mode setting unit 19 and the device operation unit 20, etc. The input from the passenger via the device operation unit 20 includes a start request for each component of the power supply function unit 25. Among the control modes that can be set using the mode setting unit 19, there is a deterioration suppression mode that suppresses the deterioration of the battery 11. The mode setting unit 19 and the device operation unit 20 are arranged at positions in the vehicle compartment such as the dashboard that can be operated by the passenger. It should be noted that the mode setting unit 19, the device operation unit 20, or both of them may not be arranged in the vehicle compartment. For example, the following configuration can be adopted: mode setting or control of each component, or control of both, is performed from a portable device (so-called smartphone, etc.) via a telematics service.

[0073] The vehicle 1 further includes: a charging connector (power acquisition unit) 31, which can acquire charging power for the battery 11 from outside the vehicle 1; a communication unit 33, which communicates with a power supply device outside the vehicle 1 via the charging connector 31; and a charging control unit 34, which controls the charging of the battery 11. A charging relay Rj is provided between the charging connector 31 and the electric wire Lb. The charging control unit 34 communicates with the BCU 14 and the vehicle control unit 15 via the communication line Lc, and controls the charging of the battery 11 in conjunction with the BCU 14 and the vehicle control unit 15. The charging control unit 34 and the BCU 14 are, for example, ECUs. The charging control unit 34 can transmit a request for power supply and a request to stop power supply to the power supply device via the communication unit 33 when the charging plug 101 of the power supply device is connected to the charging connector 31. The power supply request includes a request for a specified power size and a request for a constant voltage output. The charging control unit 34 switches the charging relay Rj and requests or stops the power supply to the power supply device, thereby switching the output and stop of the DC voltage from the charging plug 101 and switching the output and stop of the DC voltage from the charging connector 31 to the electric wire Lb. The vehicle control unit 15 and the charging control unit 34 are equivalent to an example of the control unit of the present invention.

[0074] It should be noted that in the example of the charging connector 31 described above, an example of inputting a DC voltage is shown. However, instead of or in addition to such a charging connector 31, an AC charging connector to which an AC voltage is input may be provided. In this case, a converter that converts an AC power supply voltage into a DC voltage for charging is provided between the AC charging connector and the electric wire Lb. Furthermore, the charging control unit 34 switches between starting and stopping the converter, thereby switching between outputting and stopping the DC voltage for charging to the electric wire Lb.

[0075] <Degradation suppression mode processing>

[0076] Figure 2 1 is a flowchart showing the flow of the degradation suppression mode process executed by the vehicle control unit. The degradation suppression mode process sets the degradation suppression mode as a control mode of the vehicle 1, and when the vehicle 1 is stopped and the system main relay Rs is in the connected state, the vehicle control unit 15 simultaneously executes other control processes.

[0077] When the deterioration suppression mode process starts, the vehicle control unit 15 determines whether the charging plug 101 is connected to the charging connector 31 via the charging control unit 34 (step S1). In addition, the vehicle control unit 15 determines whether the power supply function unit 25 is in the process of operation or there is an operation request (step S2). Then, if the judgment results of both are yes, the vehicle control unit 15 continues the process. If the judgment result of either one is no, the process returns to step S1.

[0078] In the situation where the judgment results of both step S1 and step S2 are yes, it includes the case where the user connects the charging plug 101 to the charging connector 31 when using the power supply function unit 25 with the power of the battery 11, the case where the power supply function unit 25 starts to be used when the charging plug 101 is connected and the battery 11 is being charged, and the case where the power supply function unit 25 is used while the charging plug 101 is connected and the battery 11 is being charged.

[0079] If the judgment results of both are yes, then next, the vehicle control unit 15 compares the maximum input power from the charging plug 101 with the maximum power consumption of the power supply function unit 25 that is in the process of operation or requested to operate (step S3). For example, the charging control unit 34 can obtain the maximum input power by communicating with the power supply device. By the vehicle control unit 15 pre - storing the rated power of each component of the power supply function unit 25 as control data, the maximum power consumption of the power supply function unit 25 can be obtained based on these. For devices such as the in - vehicle inverter 23 whose power consumption changes according to the connected devices, the rated power or the like can be used as its maximum power consumption. The result of the judgment in step S3 is that if the maximum input power is greater than or equal to the maximum power consumption of the power supply function unit 25, the vehicle control unit 15 continues the process. Otherwise, the process returns to step S1. It should be noted that a value obtained by adding a margin to the average power consumption can be used instead of the maximum power consumption.

[0080] If the process continues, the vehicle control unit 15 determines whether the charging rate of the battery is above a threshold value (e.g., 80%) indicating a level that has no impact on driving (step S4). This threshold value can also be a value indicating full charge (100%). If the judgment result of step S4 is yes, the vehicle control unit 15 continues the process. If it is no, the process returns to step S1.

[0081] If the determination results of steps S1 to S4 are all yes and the process continues, the vehicle control unit 15 adjusts the current flowing through the battery 11 to a small value (for example, 0) (step S5). For example, this adjustment process is achieved by sending a request to the power supply device via the charging control unit 34 and the communication unit 33 to lower the output voltage to the output voltage of the battery 11. Alternatively, this adjustment process can also be achieved by feeding back information on the charge and discharge current to the vehicle control unit 15, and the vehicle control unit 15 performing feedback control in such a way that the charge and discharge current becomes a small value (for example, 0) by switching the driving strength of other electronic devices (such as heaters) connected to the wire Lb.

[0082] It should be noted that if the current value of the target battery 11 is reduced to a level that does not have a negative impact when the system main relay Rs is cut off through the adjustment process in step S5, it may not be 0. Compared with the case where no adjustment process is performed, the adjustment process in step S5 can make the current value of the battery 11 smaller.

[0083] Then, if the current value of the battery 11 becomes smaller through the adjustment process, the vehicle control unit 15 switches the system main relay Rs to the cut-off state (step S6). In addition, the vehicle control unit 15 sends a request for constant voltage output to the power supply device via the charging control unit 34 and the communication unit 33 (step S7).

[0084] Through the switching in step S6, the power transmission mode via the wire Lb is transferred to the direct transmission mode, which is a mode of transmitting power from the charging plug 101 to the power supply function unit 25 without inputting and outputting power to the battery 11. In addition, through the request in step S7, a constant voltage is output from the charging plug 101, and even if the power used by the power supply function unit 25 changes, a power output that follows this change is performed from the charging plug 101. Thereafter, the vehicle control unit 15 transfers the control process to the direct transmission management process according to the states of each part, and this direct transmission management process performs operations such as continuing the direct transmission mode, stopping the direct transmission mode, and switching to other transmission modes.

[0085] <Direct Transmission Mode>

[0086] Figure 3 It is a timing chart showing the states of each component in the vehicle of the embodiment when there is a request for using the power supply function unit during the charging process. This timing chart shows an example of the control achieved through the Figure 2 deterioration suppression mode process shown.

[0087] In a state where the charging plug 101 is connected to the charging connector 31, if a charging request is made via the device operation unit 20 at time t1, first, the pre-charge relay Rpr and the relay Rn are turned on, and the inter-line voltage of the wire Lb rises. Thereafter, the system main relay Rs is switched to the connected state, and a power supply request is made to the power supply device. Then, power is output from the charging plug 101 to input a charging current to the battery 11, and the state of charge (SOC) of the battery 11 rises over time (period T1).

[0088] During charging, if the user makes a request for the operation of the power function unit 25 via the device operation unit 20 (time t2), then Figure 2 The determination results of step S1 and step S2 of the deterioration suppression mode process are yes. Then, when the conditions of Figure 2 step S3 and step S4 are satisfied, the vehicle control unit 15 switches the system main relay Rs to the off state (time t3) when adjusting the input / output current of the battery 11 to 0. Then, a constant voltage output is performed from the charging plug 101, thereby realizing a direct transfer mode in which power is directly transferred from the charging plug 101 to the power function unit 25 without inputting / outputting power to / from the battery 11 (period T2).

[0089] Figure 4 is a timing chart showing the states of the respective components in the case of a use request for the power function unit during charging in a vehicle of a comparative example. The vehicle of this comparative example is configured such that during charging, if the battery 11 is fully charged, the output from the charging plug 101 is stopped, and if the state of charge of the battery 11 is less than the recharge threshold, the output from the charging plug 101 is started again.

[0090] In such a configuration, after a charging request for the battery 11 (time t11) is made and charging of the battery 11 is started (time t12), even if a request for the operation of the power function unit 25 (time t13) is made, this state is maintained and the charging process of the battery 11 is continued. Then, if the battery 11 is fully charged, the output from the charging plug 101 is stopped. Thereafter, since the power of the battery 11 is used by the power function unit 25, the state of charge of the battery 11 decreases. Then, if the state of charge of the battery 11 is less than the recharge threshold, the output of the charging plug 101 is started again, and the battery 11 is charged until it is fully charged.

[0091] Accordingly, in the configuration of the comparative example, during the operation period T11 of the power function unit 25 during charging, charging and discharging of the battery 11 are repeated, leading to deterioration of the battery 11. On the other hand, in the vehicle 1 of the present embodiment, as Figure 3As shown, in the direct transfer mode, even when the power supply function unit 25 operates, the charging and discharging of the battery 11 are not repeated, and deterioration of the battery 11 can be suppressed.

[0092] As described above, in the vehicle 1 according to the present embodiment, when charging power is transferred from the charging plug 101 to the battery 11 and the power supply function unit 25 is started or the power supply function unit 25 continues to operate, the vehicle control unit 15 can switch the power transfer mode to the direct transfer mode. Further, in the vehicle 1 according to the present embodiment, when the power supply function unit 25 is operated using the power of the battery 11 and the charging plug 101 is connected to the charging connector 31, the vehicle control unit 15 can switch the power transfer mode to the direct transfer mode. Moreover, in the case of switching to the direct transfer mode, repeated discharging and charging of the battery 11 due to power consumption of the power supply function unit 25 and power supply from the charging plug 101 are suppressed. Therefore, in such a situation, a large change in the charging rate of the battery 11 that causes battery deterioration can be suppressed.

[0093] Further, in the vehicle 1 according to the present embodiment, when switching the power transfer mode to the direct transfer mode, the vehicle control unit 15 performs current adjustment processing ( Figure 2 step S5) of adjusting the current flowing to the battery 11 to become smaller, and then switches the system main relay Rs to the off state. In a state where a large current flows through the system main relay Rs, if the system main relay Rs is switched to the off state, the system main relay Rs may be damaged due to a large surge voltage or the like. However, by the above current adjustment processing, even when transferring from a state where the battery 11 is in a discharging process or a charging process to the direct transfer mode, damage to the system main relay Rs can be prevented.

[0094] Further, in the vehicle 1 according to the present embodiment, in the current adjustment processing ( Figure 2 step S5), the vehicle control unit 15 requests the output voltage from the power supply device via the charging control unit 34, thereby reducing the current flowing through the battery 11. According to this method, useless power consumption can be reduced, and an effective power transfer mode switch can be achieved. Further, in the vehicle 1 according to the present embodiment, in the current adjustment processing ( Figure 2 step S5), the vehicle control unit 15 reduces the current flowing through the battery 11 by switching the driving strength of other electronic devices (such as a heater) connected to the electric wire. According to this method, the current can be adjusted with high responsiveness, and when switching the system main relay Rs, the current flowing through there can be accurately controlled to a small value.

[0095] In addition, in the vehicle 1 according to the present embodiment, when the condition that the power that can be supplied from the charging plug 101 is greater than the power consumption of the power supply function unit 25 is satisfied ( Figure 2 in step S3 of), the vehicle control unit 15 switches to the direct transfer mode. In this configuration, when the power from the charging plug 101 alone does not satisfy the power required by the power supply function unit 25, the battery 11 is kept connected to the wire Lb. Therefore, the power shortage is compensated by the power of the battery 11, and the normal operation of the power supply function unit 25 can be achieved.

[0096] In addition, in the vehicle 1 according to the present embodiment, when the condition that the charging rate of the battery 11 is equal to or higher than the threshold is satisfied ( Figure 2 in step S4 of), the vehicle control unit 15 switches to the direct transfer mode. In this configuration, when the charging rate of the battery 11 is low, the battery 11 is not switched to the direct transfer mode but is charged. Therefore, in the situation where the charging plug 101 is connected, it is possible to avoid the discomfort to the user caused by not charging while the charging rate of the battery 11 is still very low.

[0097] In addition, in the vehicle 1 according to the present embodiment, the switching to the direct transfer mode is performed when the deterioration suppression mode of the battery 11 is set as the control mode of the vehicle 1. Therefore, the user can select whether to give priority to charging the battery 11 or to suppressing the deterioration of the battery 11 by setting the control mode.

[0098] The embodiments of the present invention have been described above. However, the present invention is not limited to the above embodiments. For example, the power supply function unit of the present invention is not limited to Figure 1 the configuration, and may also include a DC / DC converter that outputs a DC voltage as the power supply voltage of the connected device, a relay that directly outputs the voltage of the battery as the power supply voltage of the connected device, and the like.

[0099] In addition, in the above embodiment, as an example, a configuration in which the direct transfer mode can be transferred when the deterioration suppression mode is selected has been described. However, the direct transfer mode can also be transferred regardless of the selection of the control mode of the vehicle 1. In addition, in the above embodiment, as conditions for transferring to the direct transfer mode, examples of the conditions of adding Figure 2 step S3 and step S4 have been shown. However, these two conditions or one of them can also be omitted. In addition, in the above embodiment, an example in which the system main relay Rs is switched to the off state after performing the adjustment process of suppressing the input / output current of the battery 11 when transferring to the direct transfer mode has been shown. However, when the durability of the system main relay Rs is high, the current adjustment process can also be omitted.

[0100] In addition, in the above-described embodiment, as the control unit of the present invention, a vehicle control unit and a charging control unit are shown, and a configuration is shown in which the transmission mode of power is switched by linking these control units. However, either one of the vehicle control unit and the charging control unit, or a dedicated control unit may also control the switching of the power transmission mode. In addition, in the above-described embodiment, a configuration for obtaining power in a wired manner is shown as the power acquisition unit, but a configuration for obtaining power in a wireless manner may also be applied. In addition, the detailed parts shown in the embodiment may be appropriately changed without departing from the gist of the invention.

Claims

1. A vehicle, characterized in that, Comprising: a battery that stores electric power for driving; a power acquisition unit that can acquire electric power for charging the battery from outside the vehicle; a relay that switches the connection or disconnection between the battery and the wires of the vehicle; a power supply function unit that can receive electric power from the wires and supply a power supply voltage to devices other than the driving motor; and a control unit that performs transmission control of electric power via the wires, in a first condition where electric power is transmitted from the power acquisition unit to the battery and the power supply function unit continues to operate or starts up, first determines whether the electric power that can be acquired from the power acquisition unit is equal to or greater than the electric power requested by the power supply function unit, and then determines whether the charge rate of the battery is higher than a threshold value that is lower than the value indicating full charge of the battery and indicates a charge rate that has no effect on the driving of the vehicle. When it is determined that the electric power that can be acquired from the power acquisition unit is equal to or greater than the electric power requested by the power supply function unit and it is determined that the charge rate of the battery is equal to or higher than the threshold value, the control unit switches the power transmission mode to a direct transmission mode, so as not to transmit electric power to the battery. The direct transmission mode is a mode in which the relay is in a cut-off state and electric power is transmitted from the power acquisition unit to the power supply function unit, when it is not determined that the electric power that can be acquired from the power acquisition unit is equal to or greater than the electric power requested by the power supply function unit, regardless of the charge rate of the battery, the relay is not switched to the cut-off state and the battery is kept connected to the power supply function unit, and the power of the battery is used to supplement the power supply to the power supply function unit, the control unit performs switching to the direct transmission mode after performing a current adjustment process of adjusting the current flowing through the battery to decrease, the current adjustment process includes a process of adjusting the current flowing through the battery to decrease by sending a request to the power supply device to lower the output voltage of the power supply device to the output voltage of the battery via the communication unit of the vehicle and the charging connector of the vehicle in a state where the charging plug of the power supply device is connected to the charging connector of the vehicle.

2. The vehicle according to claim 1, wherein when the power supply function unit operates with the power of the battery, in a second condition where electric power can be acquired from the power acquisition unit, when it is determined that the charge rate of the battery is equal to or higher than the threshold value, the control unit switches the power transmission mode to a direct transmission mode. The direct transmission mode is a mode in which the relay is in a cut-off state and electric power is transmitted from the power acquisition unit to the power supply function unit.

3. The vehicle according to claim 2, wherein in the second condition, and when the electric power that can be acquired from the power acquisition unit is equal to or greater than the electric power requested by the power supply function unit, the control unit switches the power transmission mode to the direct transmission mode.

4. The vehicle according to claim 2, wherein The vehicle is provided with a mode setting unit capable of selecting a control mode of the vehicle. In the first situation or the second situation, and when the control mode is a predetermined mode, the control unit switches the power transmission mode to the direct transmission mode.

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