vehicle
The vehicle system addresses low-temperature battery performance issues by using separate power sources for heating and charging, reducing charging time and deterioration through strategic current distribution.
Patent Information
- Authority / Receiving Office
- JP · JP
- Patent Type
- Patents
- Current Assignee / Owner
- SUBARU CORP
- Filing Date
- 2022-11-30
- Publication Date
- 2026-06-17
Smart Images
Figure 0007875298000001 
Figure 0007875298000002 
Figure 0007875298000003
Abstract
Description
Technical Field
[0001] The present invention relates to a vehicle.
Background Art
[0002] Conventionally, when the battery mounted on a vehicle is at a low temperature (for example, when the temperature of the battery is less than a predetermined value such as less than 0°C), the performance of the battery deteriorates, and the charging time when charging the battery may become longer. Further, when the battery is at a low temperature, the degree of progress of battery deterioration may accelerate when the battery is charged. Therefore, Patent Document 1 discloses providing a heater for raising the temperature of the battery mounted on a vehicle.
Prior Art Documents
Patent Documents
[0003]
Patent Document 1
Summary of the Invention
Problems to be Solved by the Invention
[0004] By the way, when the battery is at a low temperature and the battery is charged while raising the temperature of the battery with a heater, the current supplied to the battery decreases by the amount of current supplied to the heater, and as a result, the charging time of the battery may become longer.
[0005] An object of the present invention is to provide a vehicle capable of shortening the charging time of a battery even when the battery is at a low temperature.
Means for Solving the Problems
[0006] In order to solve the above problems, the vehicle of the present invention includes a DC charging inlet, an AC charging inlet, A battery for driving a motor is configured to be connectable to the DC charging inlet and the AC charging inlet, A temperature control device capable of raising the temperature of the aforementioned battery, The DC charging inlet, the AC charging inlet, the battery, and the connection circuit for connecting the temperature control device, A control device that performs charging control for charging the aforementioned battery, Equipped with, The connection circuit includes a bypass circuit that connects the AC charging inlet and the temperature control device, bypassing the battery. fruit, The control device is One or more processors, One or more memory connected to the processor, It has, The aforementioned processor, In the charging control described above, if the battery temperature is below a predetermined value, the connection circuit is controlled to a state in which current is supplied to the temperature control device but not to the battery from the AC charging inlet, thereby raising the battery temperature, and then current is supplied to the battery from the DC charging inlet to charge the battery. Execute the process that includes . [Effects of the Invention]
[0007] According to the present invention, it is possible to shorten the battery charging time even when the battery is at a low temperature. [Brief explanation of the drawing]
[0008] [Figure 1] Figure 1 is an explanatory diagram illustrating the schematic configuration of the vehicle according to this embodiment. [Figure 2] Figure 2 shows an example of the functional configuration of a control device. [Figure 3] Figure 3 is an explanatory diagram illustrating an example of battery charging control when a vehicle receives current from both AC and DC charging stations. [Figure 4] Figure 4 is a flowchart illustrating the charging control process at the start of battery charging when a vehicle receives current from both an AC charging station and a DC charging station. [Figure 5]FIG. 5 is a flowchart of a charging control process during charging of a battery when the vehicle receives current supply from both an AC charging stand and a DC charging stand. [Figure 6] FIG. 6 is a first explanatory diagram showing an example of battery charging control when the vehicle receives current supply only from an AC charging stand. [Figure 7] FIG. 7 is a second explanatory diagram showing an example of battery charging control when the vehicle receives current supply only from an AC charging stand. [Figure 8] FIG. 8 is a first explanatory diagram showing an example of battery charging control when the vehicle receives current supply only from a DC charging stand. [Figure 9] FIG. 9 is a second explanatory diagram showing an example of battery charging control when the vehicle receives current supply only from a DC charging stand. [Figure 10] FIG. 10 is an explanatory diagram for explaining a schematic configuration of a vehicle according to a modification.
BEST MODE FOR CARRYING OUT THE INVENTION
[0009] Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings. The specific dimensions, materials, numerical values, etc. shown in such embodiments are merely examples for facilitating understanding of the invention, and do not limit the present invention unless otherwise specified. In the present specification and drawings, elements having substantially the same function and configuration are denoted by the same reference numerals to omit redundant description, and elements not directly related to the present invention are not shown.
[0010] FIG. 1 is an explanatory diagram for explaining a schematic configuration of a vehicle 100 according to the present embodiment. Here, an electric vehicle is taken as an example to describe the vehicle 100. However, the vehicle 100 only needs to have a motor (not shown) for driving the vehicle 100 at least and a battery 118 for driving the motor, and for example, a hybrid vehicle equipped with an engine and a motor may also be used.
[0011] Vehicle 100 includes an AC charging inlet 102, a DC charging inlet 104, an onboard charger 106, a DC / DC converter 108, an auxiliary device 110, and a junction box. It includes a 112, an air conditioner 114, a temperature control device 116, a battery 118, a connection circuit 200, and a control device 300.
[0012] The AC charging inlet 102 is a power receiving unit that receives power from an external charging facility. For example, the AC charging inlet 102 is a power receiving unit that receives AC current from an AC charging stand 402.
[0013] The AC charging stand 402 includes a cable 402a and a connector 402b. The cable 402a connects the AC power supply (not shown) of the AC charging stand 402 to the connector 402b. The cable 402a has, for example, a structurally retractable section with a winding structure, and is configured to be retractable from the AC charging stand 402 to the AC charging inlet 102.
[0014] Connector 402b is configured to be electrically connectable to the AC charging inlet 102. For example, both the AC charging inlet 102 and connector 402b have built-in contacts. When connector 402b is attached to the AC charging inlet 102, the contacts make contact with each other, electrically connecting the AC charging inlet 102 and connector 402b. Connector 402b can supply AC current to the AC charging inlet 102 from an AC power source (not shown).
[0015] The DC charging inlet 104 is a power receiving unit that receives power from an external charging facility. For example, the DC charging inlet 104 is a power receiving unit that receives DC current from a DC charging station 404. The charging output of the DC charging station 404 is greater than the charging output of the AC charging station 402. Therefore, charging with the DC current supplied from the DC charging station 404 is faster than charging with the AC current supplied from the AC charging station 402. The AC charging station 402 can perform normal charging of the battery 118, while the DC charging station 404 can perform rapid charging of the battery 118.
[0016] The DC charging stand 404 includes a cable 404a and a connector 404b. The cable 404a connects the DC power supply (not shown) of the DC charging stand 404 to the connector 404b. The cable 404a has, for example, a structurally retractable section with a winding structure, and is configured to be retractable from the DC charging stand 404 to the DC charging inlet 104.
[0017] Connector 404b is configured to be electrically connectable to the DC charging inlet 104. For example, both the DC charging inlet 104 and connector 404b have built-in contacts. When connector 404b is attached to the DC charging inlet 104, the contacts make contact with each other, electrically connecting the DC charging inlet 104 and connector 404b. Connector 404b can supply DC current to the DC charging inlet 104 from a DC power supply (not shown).
[0018] The onboard charger 106 is a power converter for converting the alternating current supplied from the AC charging inlet 102 into direct current. The DC / DC converter 108 is connected to the onboard charger 106. This is a converter that steps down the DC current supplied from the main unit to the DC current required by the auxiliary unit 110.
[0019] The auxiliary device 110 operates using the DC current supplied from the DC / DC converter 108, These are devices that operate at low voltages such as 2V, and examples include car navigation systems and in-car cameras.
[0020] The junction box 112 includes terminals and connectors used when connecting, branching, and relaying electric wires. The junction box 112 includes a DC / DC converter 108 and an air coil The junction box 112 is equipped with a relay (not shown) that can open and close the connection between the junction box 114 and the temperature control equipment 116. The relay in the junction box 112 is controlled by the control device 300 and is a DC / DC converter. Connecting or disconnecting the power supply 108 and the air conditioner 114, or DC / DC converter The device connects or disconnects the converter 108 and the temperature control device 116.
[0021] The air conditioner 114 includes a compressor and operates the compressor to provide air conditioning for the vehicle interior. The temperature control device 116 is configured to raise the temperature of the battery 118 and heats the battery 118, for example, by generating Joule heat using current supplied from the connection circuit 200. The temperature control device 116 is composed of, for example, a heater. The air conditioner 114 and the temperature control device 116 operate at a low voltage, such as 12V.
[0022] Battery 118 is a battery that stores power to drive a motor (not shown) mainly mounted on vehicle 100. Battery 118 is configured to be electrically connectable to AC charging inlet 102 and DC charging inlet 104, and can be charged normally or rapidly by the current supplied from either AC charging inlet 102 or DC charging inlet 104.
[0023] The connection circuit 200 includes an AC charging inlet 102, a DC charging inlet 104, an onboard charger 106, a DC / DC converter 108, an auxiliary device 110, and a junction box 11. 2. This is a circuit for connecting the air conditioner 114, the temperature control equipment 116, and the battery 118.
[0024] The connection circuit 200 includes a first connection circuit 202, a second connection circuit 204, a third connection circuit 206, a fourth connection circuit 208, a fifth connection circuit 210, a sixth connection circuit 212, a seventh connection circuit 214, an eighth connection circuit 216, and a ninth connection circuit 218.
[0025] The first connection circuit 202 electrically connects the AC charging inlet 102 and the onboard charger 106. The first connection circuit 202 supplies AC current from the AC charging inlet 102 to the onboard charger 106. The second connection circuit 204 connects the onboard charger 106 to the DC / DC converter 1 08 is electrically connected. The second connection circuit 204 receives the DC / DC converter from the onboard charger 106. A DC current is supplied to the verter 108.
[0026] The third connection circuit 206 electrically connects the onboard charger 106 and the battery 118. The third connection circuit supplies DC current from the onboard charger 106 to the battery 118. The fourth connection circuit 208 electrically connects the DC / DC converter 108 and the auxiliary equipment 110. 208 supplies DC current from the DC / DC converter 108 to the auxiliary equipment 110.
[0027] The fifth connection circuit 210 connects the DC / DC converter 108 and the junction box 112 The electrical connection is made. The fifth connection circuit 210 is a junk from the DC / DC converter 108. A DC current is supplied to the suction box 112.
[0028] The sixth connection circuit 212 electrically connects the junction box 112 and the air conditioner 114. The sixth connection circuit 212 supplies DC current from the junction box 112 to the air conditioner 114. The seventh connection circuit 214 electrically connects the junction box 112 and the temperature control equipment 116. The seventh connection circuit 214 supplies DC current from the junction box 112 to the temperature control equipment 116.
[0029] The eighth connection circuit 216 electrically connects the DC charging inlet 104 and the battery 118. The eighth connection circuit 216 supplies DC current from the DC charging inlet 104 to the battery 118. The ninth connection circuit 218 connects the eighth connection circuit 216 to the DC / DC converter 10 The 8 is electrically connected. The 9th connection circuit 218 is a branch circuit that branches off from the 8th connection circuit 216. The 9th connection circuit 218 supplies DC current from the DC charging inlet 104 to the DC / DC converter 108 via a part of the 8th connection circuit 216.
[0030] Furthermore, the connection circuit 200 includes relays 204a for the second connection circuit, 206a for the third connection circuit, 210a for the fifth connection circuit, 216a for the eighth connection circuit, and 218a for the ninth connection circuit.
[0031] The relay 204a for the second connection circuit is provided in the second connection circuit 204. The relay 204a for the second connection circuit is switched on and off by the control device 300, and the onboard charger 106 and DC / Connect or disconnect the DC converter 108.
[0032] The relay 206a for the third connection circuit is provided in the third connection circuit 206. The relay 206a for the third connection circuit is controlled on and off by the control device 300 to connect or disconnect the onboard charger 106 and the battery 118.
[0033] The relay 210a for the fifth connection circuit is provided in the fifth connection circuit 210. The relay 210a for the fifth connection circuit is switched on and off by the control device 300 and the DC / DC converter 10 Connect or disconnect 8 and junction box 112.
[0034] The relay 216a for the eighth connection circuit is provided in the eighth connection circuit 216. The relay 216a for the eighth connection circuit is controlled on and off by the control device 300 to connect or disconnect the DC charging inlet 104 and the battery 118.
[0035] The relay 218a for the ninth connection circuit is provided in the ninth connection circuit 218. The relay 218a for the ninth connection circuit is controlled on and off by the control device 300 to connect or disconnect the DC charging inlet 104 and the DC / DC converter 108.
[0036] The control device 300 performs charging control to charge the battery 118. The control device 300 is connected to each component provided in the vehicle 100 described above by control lines (not shown). The control device 300 has one or more processors 300a and one or more memories 300b connected to the processors 300a. The processor 300a includes, for example, a CPU (Central Processing Unit). The memories 300b include, for example, ROM (Read Only Memory) and RAM (Random Access Memory). ROM is a memory element that stores programs and arithmetic parameters used by the CPU. RAM is a memory element that temporarily stores data such as variables and parameters used in processing performed by the CPU.
[0037] Figure 2 is a block diagram showing an example of the functional configuration of the control device 300. For example, as shown in Figure 2, the control device 300 includes an inlet connection detection unit 310, a battery temperature detection unit 320, and a charge control unit 330. Various processes, including those described below, performed by the inlet connection detection unit 310, the battery temperature detection unit 320, or the charge control unit 330, can be executed by the processor 300a. In detail, various processes are executed by the processor 300a executing a program stored in memory 300b.
[0038] The inlet connection detection unit 310 detects the connection between the AC charging inlet 102 and the connector 402b, and the connection between the DC charging inlet 104 and the connector 404b. Specifically, the AC charging inlet 102 is provided with a sensor 102a that detects the connection to the connector 402b. Based on the detection signal from the sensor 102a, the inlet connection detection unit 310 detects the connection between the AC charging inlet 102 and the connector 402b.
[0039] Similarly, the DC charging inlet 104 is provided with a sensor 104a that detects connection to the connector 404b. The inlet connection detection unit 310 detects the connection between the DC charging inlet 104 and the connector 404b based on the detection signal from the sensor 104a.
[0040] The battery temperature detection unit 320 detects the temperature of the battery 118. Specifically, the battery 118 is equipped with a sensor 118a that detects the temperature of the battery 118. The battery temperature detection unit 320 detects the temperature of the battery 118 based on the detection signal from the sensor 118a.
[0041] The charging control unit 330 includes the onboard charger 106, DC / DC converter 108, and junction box. The charging control unit 330 controls the on / off state of the relays for the second connection circuit 204a, the third connection circuit 206a, the fifth connection circuit 210a, the eighth connection circuit 216a, the ninth connection circuit 218a, and the junction box 112. This enables charging control of the battery 118 mounted on the vehicle 100.
[0042] Specifically, the charging control unit 330 controls the on / off state of each relay based on the detection results of the inlet connection detection unit 310 and the battery temperature detection unit 320. When the charging control unit 330 controls each relay to be on, the circuit in which each relay is installed becomes connected, and when the charging control unit 330 controls each relay to be off, the circuit in which each relay is installed becomes disconnected.
[0043] Next, the detailed control contents of the charging control unit 330 will be described. Here, the charging control of the battery 118 when the vehicle 100 receives current from both the AC charging station 402 and the DC charging station 404 will be described.
[0044] Figure 3 is an explanatory diagram illustrating an example of battery 118 charging control when vehicle 100 receives current from both AC charging station 402 and DC charging station 404. In the figure, thick lines indicate the state in which current is flowing through each circuit. Figure 3 describes the charging control when battery 118 is at a low temperature, that is, when the temperature of battery 118 is below a predetermined value. Here, the predetermined value is, for example, 0°C.
[0045] Specifically, in Figure 3, the inlet connection detection unit 310 is detecting the connection between the AC charging inlet 102 and connector 402b, and the connection between the DC charging inlet 104 and connector 404b. In addition, the battery temperature detection unit 320 is detecting that the temperature of the battery 118 is below 0°C.
[0046] The connection of the AC charging inlet 102 to the connector 402b, the connection of the DC charging inlet 104 to the connector 404b, and the condition that the temperature of the battery 118 is below 0°C are defined as the first condition.
[0047] When the state of the vehicle 100 satisfies the first condition, the charging control unit 330 performs charging control by supplying current from the AC charging inlet 102 to the temperature control device 116, while simultaneously supplying current from the DC charging inlet 104 to the battery 118 to charge the battery 118.
[0048] Specifically, as shown in Figure 3, the charging control unit 330 turns off the relay 206a for the third connection circuit and the relay 218a for the ninth connection circuit. As a result, the third connection circuit 206 and the ninth connection circuit 218 are disconnected and become unconnected.
[0049] Meanwhile, the charging control unit 330 turns on the relays 204a for the second connection circuit, 210a for the fifth connection circuit, and 216a for the eighth connection circuit. As a result, the second connection circuit 204, the fifth connection circuit 210, and the eighth connection circuit 216 become conductive and connected. This allows current to be supplied from the AC charging inlet 102 to the temperature control device 116 while current is supplied from the DC charging inlet 104 to the battery 118.
[0050] If the temperature of battery 118 is below a predetermined value, the performance of battery 118 may decrease, and the charging time when charging battery 118 may increase. Also, if the temperature of battery 118 is below a predetermined value, charging battery 118 may accelerate the rate of deterioration of battery 118. Therefore, when charging battery 118, if the temperature of battery 118 is below a predetermined value, it is necessary to raise the temperature of battery 118 to above the predetermined value.
[0051] However, for example, if vehicle 100 receives power from a single power source, a portion of the current supplied from that power source is used for the temperature control equipment 116. As a result, the current supplied from the single power source to battery 118 decreases by the amount used for the temperature control equipment 116, and consequently, the charging time of battery 118 increases.
[0052] Therefore, as shown in Figure 3, when the vehicle 100 receives current from both the AC charging station 402 and the DC charging station 404, the charging control unit 330 causes the AC charging station 402 to supply current to the temperature control device 116 and the DC charging station 404 to supply current to the battery 118.
[0053] Specifically, the charging control unit 330 supplies current from the AC charging inlet 102 to the temperature control device 116, which then raises the temperature of the battery 118. The charging control unit 330 also supplies current from the DC charging inlet 104 to the battery 118, thereby charging the battery 118.
[0054] Thus, when the temperature of the battery 118 is below a predetermined value, the temperature control device 116 operates using the current supplied from the AC charging station 402 and does not operate using the current supplied from the DC charging station 404. Therefore, the battery 118 can receive the current supplied from the DC charging station 404 without a portion of the current supplied from the DC charging station 404 being used by the temperature control device 116. Consequently, the charging time can be shortened compared to when current is supplied to both the temperature control device 116 and the battery 118 from a single power source.
[0055] Furthermore, charging with the DC current supplied from the DC charging station 404 is faster than charging with the AC current supplied from the AC charging station 402. Therefore, the charging time can be shortened compared to when the battery 118 is charged by receiving current supplied from the AC charging station 402.
[0056] Furthermore, the charging control unit 330 changes the current supplied to the battery 118 based on the temperature of the battery 118. Specifically, the charging control unit 330 controls the current supplied to the battery 118 to increase as the temperature of the battery 118 increases. In Figure 3, the charging control unit 330 sends a command to the DC charging station 404 so that the current supplied from the DC charging station 404 increases linearly as the temperature of the battery 118 increases. This makes it possible to shorten the charging time while suppressing the rate of deterioration of the battery 118 during charging.
[0057] Figure 4 is a flowchart of the charging control process at the start of charging the battery 118 when the vehicle 100 receives current from both the AC charging station 402 and the DC charging station 404.
[0058] As shown in Figure 4, the inlet connection detection unit 310 detects that the connector 402b of the AC charging stand 402 is connected to the AC charging inlet 102 (S100). The inlet connection detection unit 310 also detects that the connector 404b of the DC charging stand 404 is connected to the DC charging inlet 104 (S102).
[0059] The battery temperature detection unit 320 detects the temperature of the battery 118 (S104). Then, the charging control unit 330 determines whether the temperature of the battery 118 is below a predetermined value based on the temperature of the battery 118 detected by the battery temperature detection unit 320 (S106).
[0060] If the temperature of the battery 118 is below a predetermined value (YES in S106), the charging control unit 330 controls the battery heating mode from the off state to the on state as a mode for raising the temperature of the battery 118 (S108). The battery heating mode is initially set to the off state.
[0061] When the battery temperature-raising mode is controlled to the ON state, the charging control unit 330 controls the relay 210a for the fifth connection circuit from the OFF state to the ON state (S110). When the relay 210a for the fifth connection circuit is controlled to the ON state, the charging control unit 330 controls the relay 204a for the second connection circuit from the OFF state to the ON state (S112). Note that the initial state of each relay is the OFF state. This allows the connection circuit 200 to be controlled to a battery temperature-raising state in which no current is supplied from the AC charging inlet 102 to the battery 118, but current is supplied to the temperature control device 116. In addition, the temperature control device 116 can be heated up by the current from the AC charging stand 402.
[0062] When the relay 204a for the second connection circuit is controlled to the ON state, the charge control unit 330 controls the relay 216a for the eighth connection circuit from the OFF state to the ON state (S114). In this way, if the temperature of the battery 118 is below a predetermined value at the start of charge control, the charge control unit 330 controls the connection circuit 200 to a battery temperature rise state. After that, the charge control unit 330 starts supplying current from the DC charging inlet 104 to the battery 118 and starts charging the battery 118. This allows the connection circuit 200 to be controlled to a battery temperature rise state and then current to be supplied from the DC charging inlet 104 to the battery 118 to charge the battery 118. After S114, the charge control process at the start of charging the battery 118 is terminated.
[0063] On the other hand, if the temperature of the battery 118 is not below a predetermined value (NO in S106), the charge control unit 330 keeps the relay 210a for the fifth connection circuit in the OFF state (S116) and keeps the relay 204a for the second connection circuit in the OFF state (S118). Then, it proceeds to the process in S114 and terminates the charge control process at the start of charging the battery 118. As a result, the battery 118 can be charged by supplying current to the battery 118 from the DC charging inlet 104 without raising the temperature of the battery 118 by not supplying current to the temperature control device 116 from the AC charging inlet 102.
[0064] Figure 5 is a flowchart of the charging control process during battery 118 charging when vehicle 100 receives current from both AC charging station 402 and DC charging station 404.
[0065] As shown in Figure 5, the battery temperature detection unit 320 detects the temperature of the battery 118 (S200). The charge control unit 330 then determines whether the temperature of the battery 118 is below a predetermined value based on the temperature of the battery 118 detected by the battery temperature detection unit 320 (S202).
[0066] If the temperature of the battery 118 is below a predetermined value (YES in S202), the charging control unit 330 controls the battery heating mode from the off state to the on state as a mode for raising the temperature of the battery 118 (S204).
[0067] When the battery temperature-raising mode is controlled to the ON state, the charge control unit 330 controls the relay 210a for the fifth connection circuit from the OFF state to the ON state (S206). Also, when the relay 210a for the fifth connection circuit is controlled to the ON state, the charge control unit 330 controls the relay 204a for the second connection circuit from the OFF state to the ON state (S208). In this way, when the temperature of the battery 118 falls below a predetermined value during the execution of charge control, the connection circuit 200 is controlled to the battery temperature-raising state. As a result, the connection circuit 200 can be controlled to the battery temperature-raising state in which current is supplied to the temperature control device 116 but not to the battery 118 from the AC charging inlet 102. In addition, the temperature control device 116 can be heated up by the current from the AC charging stand 402.
[0068] When the relay 204a for the second connection circuit is controlled to the ON state, the charge control unit 330 maintains the relay 216a for the eighth connection circuit in the ON state (S210). This allows the connection circuit 200 to be controlled to a battery temperature rise state, and then current to be supplied from the DC charging inlet 104 to the battery 118 to charge the battery 118. After S210, the charge control process during the charging of the battery 118 is terminated.
[0069] On the other hand, if the temperature of the battery 118 is not below a predetermined value (NO in S202), the charge control unit 330 controls the battery temperature rise mode from the ON state to the OFF state (S212). When the battery temperature rise mode is controlled to the OFF state, the charge control unit 330 controls the DC / DC converter 1 The voltage output from 08 is stepped down (S214), and the relay 210a for the fifth connection circuit is controlled from the ON state to the OFF state (S216). Here, if the relay 210a for the fifth connection circuit is suddenly turned OFF without stepping down the voltage, there is a risk of damage to components such as the fifth connection circuit 210 and the relay 210a for the fifth connection circuit. Therefore, from the perspective of protecting the components, DC / DC control is used. The voltage output from converter 108 is being stepped down.
[0070] Subsequently, the charging control unit 330, similar to S214, reduces the voltage output from the onboard charger 106 from the standpoint of protecting components (S218), and controls the relay 204a for the second connection circuit from the ON state to the OFF state (S220). In this way, when the temperature of the battery 118 exceeds a predetermined value during the execution of charging control, the charging control unit 330 stops supplying current from the AC charging inlet 102 to the temperature control device 116, thereby releasing the battery overheating state. As a result, the battery 118 can be charged by supplying current from the DC charging inlet 104 to the battery 118 without the battery 118 overheating due to the supply of current from the AC charging inlet 102 to the temperature control device 116. After S220, the process moves to S210, and the charging control process during the execution of charging of the battery 118 is terminated.
[0071] In this embodiment, by controlling the relay 206a for the third connection circuit to the off state and the relays 204a for the second connection circuit and 210a for the fifth connection circuit to the on state, the connection circuit 200 enters a battery temperature rise state in which current is supplied to the temperature control device 116 but not to the battery 118 from the AC charging inlet 102. At this time, the first connection circuit 202, the second connection circuit 204, the fifth connection circuit 210, and the seventh connection circuit 214 are formed as bypass circuits that connect the AC charging inlet 102 and the temperature control device 116 by bypassing the battery 118.
[0072] Furthermore, by controlling the relay 218a for the ninth connection circuit to the OFF state and the relay 216a for the eighth connection circuit to the ON state, the connection circuit 200 can be controlled to a battery temperature rise state, and then current can be supplied from the DC charging inlet 104 to the battery 118 to charge the battery 118.
[0073] At this time, the current supplied from the AC charging station 402 is supplied to the temperature control device 116, and the current supplied from the DC charging station 404 is supplied to the battery 118. In this way, the temperature control device 116 and the battery 118 are each supplied with current from separate power sources. As a result, the current supplied to the battery 118 from one power source is not used for the temperature control device 116 and is supplied to the battery 118 instead, thus shortening the charging time of the battery 118 compared to when some of the current is used for the temperature control device 116.
[0074] Vehicle 100 can also receive current from either AC charging station 402 only or DC charging station 404 only. As a supplement, the following describes the charging control of battery 118 when vehicle 100 receives current from AC charging station 402 only, and when vehicle 100 receives current from DC charging station 404 only.
[0075] Figure 6 is the first explanatory diagram showing an example of battery 118 charging control when vehicle 100 receives current only from AC charging station 402. In the figure, thick lines indicate the state in which current is flowing through each circuit. Figure 6 describes the charging control when the temperature of battery 118 is above a predetermined value. Here, the predetermined value is, for example, 0°C.
[0076] Specifically, in Figure 6, the inlet connection detection unit 310 has detected the connection between the AC charging inlet 102 and connector 402b, but has not detected the connection between the DC charging inlet 104 and connector 404b. In addition, the battery temperature detection unit 320 has detected a battery temperature above 0°C.
[0077] The second condition is that the AC charging inlet 102 and connector 402b are connected, the DC charging inlet 104 and connector 404b are not connected, and the temperature of the battery 118 is above 0°C.
[0078] When the state of the vehicle 100 satisfies the second condition, the charging control unit 330 performs charging control by supplying current from the AC charging inlet 102 to the battery 118 to charge the battery 118, without supplying current from the AC charging inlet 102 to the temperature control equipment 116.
[0079] Specifically, as shown in Figure 6, the charge control unit 330 turns off the relays 204a for the second connection circuit, 210a for the fifth connection circuit, 216a for the eighth connection circuit, and 218a for the ninth connection circuit. As a result, the second connection circuit 204, the fifth connection circuit 210, the eighth connection circuit 216, and the ninth connection circuit 218 are disconnected and become unconnected.
[0080] Meanwhile, the charging control unit 330 turns on the relay 206a for the third connection circuit. This causes the third connection circuit 206 to conduct and become connected. This allows current to be supplied from the AC charging inlet 102 to the battery 118 without supplying current from the AC charging inlet 102 to the temperature control device 116. In other words, if no current is supplied to the DC charging inlet 104 and only current is supplied to the AC charging inlet 102, the charging control unit 330 supplies current from the AC charging inlet 102 to the battery 118 to charge the battery 118. This allows the AC charging station 402 to perform normal charging of the battery 118 without raising its temperature.
[0081] Figure 7 is a second explanatory diagram showing an example of battery 118 charging control when the vehicle 100 receives current only from the AC charging station 402. Figure 7 describes the charging control when the temperature of the battery 118 falls below a predetermined value.
[0082] Specifically, in Figure 7, the inlet connection detection unit 310 has detected the connection between the AC charging inlet 102 and connector 402b, but has not detected the connection between the DC charging inlet 104 and connector 404b. In addition, the battery temperature detection unit 320 has detected that the temperature of the battery 118 is below 0°C.
[0083] The third condition is the connection between the AC charging inlet 102 and connector 402b, the disconnection between the DC charging inlet 104 and connector 404b, and the condition that the temperature of the battery 118 is below 0°C.
[0084] When the state of the vehicle 100 satisfies the third condition, the charging control unit 330 performs charging control by supplying current from the AC charging inlet 102 to the temperature control equipment 116, while simultaneously supplying current from the AC charging inlet 102 to the battery 118 to charge the battery 118.
[0085] Specifically, as shown in Figure 7, the charging control unit 330 turns off the relay 216a for the 8th connection circuit and the relay 218a for the 9th connection circuit. As a result, the 8th connection circuit 216 and the 9th connection circuit 218 are disconnected and become unconnected.
[0086] Meanwhile, the charging control unit 330 turns on the relays 204a for the second connection circuit, 206a for the third connection circuit, and 210a for the fifth connection circuit. As a result, the second connection circuit 204, the third connection circuit 206, and the fifth connection circuit 210 become conductive and connected. This allows current to be supplied from the AC charging inlet 102 to the temperature control device 116, which raises the temperature of the battery 118, while current is supplied from the AC charging inlet 102 to the battery 118.
[0087] Here, if the temperature of the battery 118 is below a predetermined value, it is necessary to raise the temperature of the battery 118 to above the predetermined value, as described above. For this reason, in Figure 7, the charge control unit 330 supplies current from the AC charging inlet 102 to the temperature control device 116, and the temperature control device 116 raises the temperature of the battery 118. The charge control unit 330 also supplies current from the AC charging inlet 102 to the battery 118, and charges the battery 118.
[0088] Thus, when the temperature of the battery 118 is below a predetermined value, as shown in Figure 7, the temperature control device 116 can raise the temperature of the battery 118 while charging the battery 118. In other words, when no current is supplied to the DC charging inlet 104 and only current is supplied to the AC charging inlet 102, the charging control unit 330 will supply current to the temperature control device 116 from the AC charging inlet 102. As a result, when charging the battery 118, the charging time can be shortened compared to when the temperature of the battery 118 is not raised above a predetermined value, and the rate of deterioration of the battery 118 can be suppressed.
[0089] Figure 8 is the first explanatory diagram showing an example of battery 118 charging control when the vehicle 100 receives current only from the DC charging station 404. Figure 8 describes the charging control when the temperature of the battery 118 is above a predetermined value.
[0090] Specifically, in Figure 8, the inlet connection detection unit 310 has detected the connection between the DC charging inlet 104 and connector 404b, but has not detected the connection between the AC charging inlet 102 and connector 402b. Also, the battery temperature detection unit 320 has detected a battery temperature above 0°C.
[0091] The fourth condition is that the AC charging inlet 102 and connector 402b are not connected, the DC charging inlet 104 and connector 404b are connected, and the temperature of the battery 118 is above 0°C.
[0092] When the state of the vehicle 100 satisfies the fourth condition, the charging control unit 330 performs charging control by supplying current from the DC charging inlet 104 to the battery 118 and charging the battery 118, without supplying current from the DC charging inlet 104 to the temperature control equipment 116.
[0093] Specifically, as shown in Figure 8, the charge control unit 330 controls the relays 204a for the second connection circuit, 206a for the third connection circuit, 210a for the fifth connection circuit, and 218a for the ninth connection circuit to be turned off. As a result, the second connection circuit 204, the third connection circuit 206, the fifth connection circuit 210, and the ninth connection circuit 218 are disconnected and become unconnected.
[0094] Meanwhile, the charging control unit 330 turns on the relay 216a for the eighth connection circuit. This causes the eighth connection circuit 216 to conduct and become connected. This allows current to be supplied from the DC charging inlet 104 to the battery 118 without supplying current from the DC charging inlet 104 to the temperature control device 116. In other words, when no current is supplied to the AC charging inlet 102 and only current is supplied to the DC charging inlet 104, the charging control unit 330 supplies current from the DC charging inlet 104 to the battery 118 to charge the battery 118. This allows the DC charging station 404 to perform rapid charging of the battery 118 without raising its temperature.
[0095] Figure 9 is a second explanatory diagram showing an example of battery 118 charging control when the vehicle 100 receives current only from the DC charging station 404. Figure 9 describes the charging control when the temperature of the battery 118 falls below a predetermined value.
[0096] Specifically, in Figure 9, the inlet connection detection unit 310 has detected the connection between the DC charging inlet 104 and connector 404b, but has not detected the connection between the AC charging inlet 102 and connector 402b. In addition, the battery temperature detection unit 320 has detected that the temperature of the battery 118 is below 0°C.
[0097] The fifth condition is that the AC charging inlet 102 and connector 402b are not connected, the DC charging inlet 104 and connector 404b are connected, and the temperature of the battery 118 is below 0°C.
[0098] When the state of the vehicle 100 satisfies the fifth condition, the charging control unit 330 performs charging control by supplying current from the DC charging inlet 104 to the temperature control equipment 116, while simultaneously supplying current from the DC charging inlet 104 to the battery 118 to charge the battery 118.
[0099] Specifically, as shown in Figure 9, the charging control unit 330 turns off the relay 204a for the second connection circuit and the relay 206a for the third connection circuit. As a result, the second connection circuit 204 and the third connection circuit 206 are disconnected and become unconnected.
[0100] Meanwhile, the charging control unit 330 turns on the relays 210a for the fifth connection circuit, 216a for the eighth connection circuit, and 218a for the ninth connection circuit. As a result, the fifth connection circuit 210, the eighth connection circuit 216, and the ninth connection circuit 218 become conductive and connected. In other words, if no current is supplied to the AC charging inlet 102 and only the DC charging inlet 104 is supplied with current, the charging control unit 330 causes the DC charging inlet 104 to supply current to the temperature control device 116. This allows the temperature control device 116 to raise the temperature of the battery 118 while the DC charging inlet 104 supplies current to the battery 118.
[0101] Thus, when the temperature of the battery 118 is below a predetermined value, as shown in Figure 9, the temperature control device 116 can raise the temperature of the battery 118 while charging the battery 118. This shortens the charging time and suppresses the rate of deterioration of the battery 118 compared to when the temperature of the battery 118 is not raised above a predetermined value.
[0102] Figure 10 is an explanatory diagram illustrating the schematic configuration of a modified vehicle 1000. Components that are substantially the same as those of the vehicle 100 in the above embodiment are denoted by the same reference numerals and their descriptions are omitted. The vehicle 1000 of this modified embodiment is equipped with a connection circuit 1200 that differs from the connection circuit 200 in the above embodiment. The connection circuit 1200 of this modified embodiment differs from the connection circuit 200 in the above embodiment only in the configuration of the second connection circuit 1204 and the ninth connection circuit 1218; all other configurations are the same. Therefore, the second connection circuit 1204 and the ninth connection circuit 1218 will be described in detail below.
[0103] The second connection circuit 1204 electrically connects the onboard charger 106 and the junction box 112. The second connection circuit 1204 supplies DC current from the onboard charger 106 to the junction box 112.
[0104] The ninth connection circuit 1218 electrically connects the eighth connection circuit 216 and the junction box 112. The ninth connection circuit 218 is a branch circuit that branches off from the eighth connection circuit 216. The ninth connection circuit 1218 supplies DC current to the junction box 112 from the DC charging inlet 104 via a part of the eighth connection circuit 216. Here, a relay (not shown) in the junction box 112 can supply current supplied from the second connection circuit 1204 or the ninth connection circuit 1218 to the temperature control device 116 via the seventh connection circuit 214.
[0105] The relay 1204a for the second connection circuit is provided in the second connection circuit 1204. The relay 1204a for the second connection circuit is controlled on and off by the control device 300 to connect or disconnect the onboard charger 106 and the junction box 112.
[0106] The relay 1218a for the ninth connection circuit is provided in the ninth connection circuit 1218. The relay 1218a for the ninth connection circuit is controlled on and off by the control device 300 to connect or disconnect the DC charging inlet 104 and the junction box 112.
[0107] In this modified example, by controlling the relay 206a for the third connection circuit to the off state and the relay 1204a for the second connection circuit to the on state, the connection circuit 1200 enters a battery temperature rise state in which current is supplied to the temperature control device 116 but not to the battery 118 from the AC charging inlet 102. At this time, the first connection circuit 202, the second connection circuit 1204, and the seventh connection circuit 214 are formed as bypass circuits that connect the AC charging inlet 102 and the temperature control device 116 by bypassing the battery 118.
[0108] Furthermore, by controlling the relay 1218a for the ninth connection circuit to the off state and the relay 216a for the eighth connection circuit to the on state, the connection circuit 1200 can be controlled to a battery temperature rise state, and then current can be supplied from the DC charging inlet 104 to the battery 118 to charge the battery 118. According to this modified example, the same operation and effects as the above embodiment can be achieved.
[0109] Preferred embodiments of the present invention have been described above with reference to the attached drawings, but it goes without saying that the present invention is not limited to these embodiments. It will be obvious to those skilled in the art that various modifications or alterations can be conceived within the scope of the claims, and these will naturally also fall within the technical scope of the present invention.
[0110] The series of processes performed by each device (for example, the control device 300) according to this embodiment described above may be implemented using software, hardware, or a combination of software and hardware. The program constituting the software may be, for example, a non-transitory storage medium provided inside or outside each device. The program is pre-stored in a storage medium (such as ROM). Then, the program is read from a non-temporary storage medium (such as ROM) to a temporary storage medium (such as RAM) and executed by a processor such as a CPU.
[0111] It is possible to create programs to implement each of the above-mentioned devices and install them on the computers of each device. The processor executes the programs stored in memory, thereby carrying out the processing of each of the above-mentioned functions. At this time, the program may be divided and executed by multiple processors, or it may be executed by a single processor. Alternatively, each of the above-mentioned devices may be implemented through cloud computing, which uses multiple computers interconnected by a communication network.
[0112] The program may be provided to and installed on each device's computer via a communication network from an external device. Alternatively, the program may be stored on a non-transitory computer-readable medium and provided to and installed on each device's computer via that medium.
[0113] Furthermore, according to this embodiment, a program for executing the processing of each function of each of the above-mentioned devices can be provided. In addition, a non-temporary storage medium that can be read by a computer and on which the program is stored can also be provided. The non-temporary storage medium may be a disk-type storage medium such as an optical disk, magnetic disk, or magneto-optical disk, or it may be a semiconductor memory such as a flash memory or USB memory. [Explanation of Symbols]
[0114] 100 vehicles 102 AC charging inlet 104 DC charging inlet 106 On-board charger 108 DC / DC Converter 110 Auxiliary equipment 112 Junction Box 114 Air conditioner 116 Temperature control equipment 118 batteries 200 connection circuits 202 First Connection Circuit 204 Second Connection Circuit 204a Relay for the second connection circuit 206 Third Connection Circuit 206a Relay for the third connection circuit 208 Fourth Connection Circuit 210 Fifth connection circuit 210a Relay for the 5th connection circuit 212 Sixth Connection Circuit 214 Seventh Connection Circuit 216 Eighth connection circuit 216a Relay for the 8th connection circuit 218 9th Connection Circuit 218a Relay for the 9th connection circuit 300 Control device 310 Inlet connection detection unit 320 Battery temperature detection unit 330 Charging Control Unit
Claims
1. DC charging inlet, AC charging inlet, A battery for driving a motor is configured to be connectable to the DC charging inlet and the AC charging inlet, A temperature control device capable of raising the temperature of the aforementioned battery, The DC charging inlet, the AC charging inlet, the battery, and the connection circuit for connecting the temperature control device, A control device that performs charging control for charging the aforementioned battery, Equipped with, The connection circuit includes a bypass circuit that connects the AC charging inlet and the temperature control device, bypassing the battery. The control device is One or more processors, One or more memories connected to the processor, It has, The aforementioned processor, In the charging control described above, if the battery temperature is below a predetermined value, the connection circuit is controlled to a state in which current is supplied to the temperature control device but not to the battery from the AC charging inlet, thereby raising the battery temperature, and then current is supplied to the battery from the DC charging inlet to charge the battery. Execute the process that includes vehicle.
2. The aforementioned processor, When the charging control is initiated, if the battery temperature is below the predetermined value, the connection circuit is controlled to a battery temperature rise state, and then the process is executed which includes starting to supply current from the DC charging inlet to the battery to start charging the battery. The vehicle according to claim 1.
3. The aforementioned processor, During the execution of the charging control, when the battery temperature exceeds the predetermined value, the system performs a process that includes stopping the supply of current from the AC charging inlet to the temperature control device to release the battery overheating state. The vehicle according to claim 2.
4. The aforementioned processor, During the execution of the charging control, when the battery temperature falls below the predetermined value, the system performs a process that includes controlling the connection circuit to the battery temperature rise state. The vehicle according to claim 3.
5. The aforementioned processor, Based on the temperature of the battery, the current supplied to the battery is changed. The vehicle according to any one of claims 1 to 4.
6. The aforementioned processor, If no current is supplied to the DC charging inlet and only the AC charging inlet is supplied with current, the charging control will supply current to the battery from the AC charging inlet to charge the battery. The vehicle according to any one of claims 1 to 4.
7. The aforementioned processor, If no current is supplied to the AC charging inlet and only the DC charging inlet is supplied with current, the charging control will cause the DC charging inlet to supply current to the temperature control device. The vehicle according to any one of claims 1 to 4.