In-vehicle control devices

Abstract

This technology provides a mechanism to stop the output from the housing containing the low-voltage battery to the outside when the service plug is removed. [Solution] The vehicle 1, including the on-board control device 30, comprises a low-voltage battery 11, a high-voltage battery 12, a first voltage conversion unit 13 that performs a voltage boosting operation to boost the voltage input from the low-voltage battery 11 and output it to the high-voltage battery 12, a housing 19 that houses the low-voltage battery 11, a switch unit 14 between the low-voltage battery 11 and the first voltage conversion unit 13 that stops the output from the low-voltage battery 11 to the outside of the housing 19, and a service plug 18 that cuts off the power supply from the high-voltage battery 12 when it is disconnected from the connection target unit 17. The on-board control device 30 includes a control unit 40 that controls the switch unit 14. When the control unit 40 determines that the service plug 18 has been disconnected from the connection target unit 17, it switches the switch unit 14 to the off state.

Description

Technical Field

[0001] This disclosure relates to an in-vehicle control device.

Background Art

[0002] The electric vehicle disclosed in Patent Document 1 discloses a first battery that supplies power to in-vehicle devices of a high-voltage system and a second battery that supplies power to in-vehicle devices of a low-voltage system. The first battery is provided with a service plug that can cut off the high voltage without using tools.

Prior Art Documents

Patent Documents

[0003]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0004] In the configuration of Patent Document 1, the high voltage of the first battery is cut off by removing the service plug. However, even after the service plug is removed, the output of the second battery does not stop. Therefore, there is a risk of arc discharge when the conductive part electrically connected to the second battery is removed.

[0005] An object of this disclosure is to provide a technology capable of stopping the output to the outside of the housing accommodating the low-voltage battery when the service plug is removed.

Means for Solving the Problems

[0006] The in-vehicle control device of this disclosure is An in-vehicle control device included in a vehicle, comprising: a low-voltage battery; a high-voltage battery; a first voltage conversion unit that performs a voltage boosting operation to boost the voltage input from the low-voltage battery and output it to the high-voltage battery; a housing for the low-voltage battery; a switch unit between the low-voltage battery and the first voltage conversion unit that stops the output from the low-voltage battery to the outside of the housing; and a service plug that cuts off the power supply from the high-voltage battery when it is disconnected from the connected part, The system includes a control unit that controls the aforementioned switch section, When the control unit determines that the service plug has been removed from the connected unit, it switches the switch unit to the OFF state. [Effects of the Invention]

[0007] According to the technology disclosed herein, when the service plug is removed, the output to the outside of the housing containing the low-voltage battery can be stopped. [Brief explanation of the drawing]

[0008] [Figure 1] Figure 1 is a schematic diagram showing a vehicle including an in-vehicle control device according to the first embodiment. [Figure 2] Figure 2 is a sequence diagram of the processes performed by the first control unit and the second control unit in the first embodiment. [Figure 3] Figure 3 is a schematic diagram showing the state of the vehicle when the service plug is removed in the first embodiment. [Figure 4] Figure 4 is a schematic diagram showing the state of the vehicle when the service plug is connected in the first embodiment. [Figure 5] Figure 5 is a schematic diagram showing a vehicle including the in-vehicle control device of the second embodiment. [Figure 6] Figure 6 is a sequence diagram of the processing performed by the first control unit and the second control unit in the second embodiment. [Figure 7] Figure 7 is a schematic diagram showing a vehicle including the in-vehicle control device of the third embodiment. [Figure 8]Figure 8 is a sequence diagram of the processes performed by the first control unit, the second control unit, and the third control unit in the third embodiment. [Figure 9] Figure 9 is a schematic diagram showing a vehicle including the in-vehicle control device of the fourth embodiment. [Figure 10] Figure 10 is a sequence diagram of the processing performed by the first control unit, second control unit, and third control unit in the fourth embodiment. [Modes for carrying out the invention]

[0009] [Description of Embodiments in this Disclosure] First, the embodiments of this disclosure will be listed and described.

[0010] [1] An in-vehicle control device included in a vehicle, comprising: a low-voltage battery; a high-voltage battery; a first voltage conversion unit that performs a voltage boosting operation to boost the voltage input from the low-voltage battery and output it to the high-voltage battery; a housing for the low-voltage battery; a switch unit between the low-voltage battery and the first voltage conversion unit that stops the output from the low-voltage battery to the outside of the housing; and a service plug that cuts off the power supply from the high-voltage battery when it is disconnected from the connected part, The system includes a control unit that controls the aforementioned switch section, The control unit, when it determines that the service plug has been removed from the connected unit, switches the switch unit to the OFF state. In-vehicle control device.

[0011] The control unit of the above-mentioned in-vehicle control device switches the switch to the OFF state when it determines that the service plug has been removed from the connected part. This stops the output from the low-voltage battery to the outside of the housing. In other words, with this configuration, the output to the outside of the housing housing the low-voltage battery can be stopped when the service plug is removed.

[0012] [2] The control unit shall A first control unit that controls the switch section, a second control unit provided separately from the first control unit; The first control unit operates by receiving power supply from the low-voltage battery in the housing, and switches between a first startup state and a first power-saving state with lower power consumption than the first startup state. When the service plug is removed from the connection target part, the switch part is switched to an off state, and then, the first control unit shifts from the first startup state to the first power-saving state. Furthermore, a power storage unit provided outside the housing is provided. The power storage unit is charged by the power supplied from the low-voltage battery through the switch unit in the on state. The second control unit is arranged outside the housing, and repeatedly determines whether or not startup conditions are satisfied by using the power supplied from the power storage unit after the service plug is removed from the connection target part. When it is determined that the startup conditions are satisfied, a first startup instruction process for switching the first control unit to the first startup state is performed. When the first startup instruction process is performed, the first control unit shifts to the first startup state and switches the switch unit to the on state. The in-vehicle control device according to [1].

[0013] After switching the switch unit to the off state, the first control unit shifts to the first power-saving state. Thereby, the power consumption of the low-voltage battery due to the operation of the first control unit can be suppressed. Furthermore, when the startup conditions are satisfied, the first control unit can shift to the first startup state and return the switch unit to the on state.

[0014] 〔3〕A switching unit provided between a branch path branched from a conductive path provided on the side of the first voltage conversion unit with respect to the switch unit and the power storage unit is provided. The switching unit switches between an allowable state that allows the current to flow between the branch path and the power storage unit and a cutoff state that cuts off the current flow between the branch path and the power storage unit. The second control unit, when the service plug is unplugged from the connection target unit, switches the switching unit from the allowable state to the disconnected state, repeatedly determines whether the startup condition has been met using the power supplied from the power storage unit, and performs the first startup instruction process if it determines that the startup condition has been met. The vehicle-mounted control device described in [2].

[0015] The second control unit can repeatedly determine whether the startup conditions have been met while preventing the power from the energy storage unit from being released into the branch circuit by switching the switching unit to the off state when the service plug is unplugged from the connected unit.

[0016] [4] The first control unit has a first input unit to which power is supplied from the low-voltage battery, and a second input unit provided separately from the first input unit, The switching unit switches between a stopped state in the interrupted state, which stops the output from the energy storage unit to the second input unit, and a first output state, which allows power supply from the energy storage unit to the second input unit. The second control unit, when the service plug is unplugged from the connection target unit, switches the switching unit from the allowable state to the stopped state, repeatedly determines whether the start condition has been met using the power supplied from the energy storage unit, and when it is determined that the start condition has been met, switches the switching unit from the stopped state to the first output state as the first start instruction process. The first control unit transitions to the first startup state when power is supplied to the second input unit, and switches the switch unit to the ON state. The in-vehicle control device described in [3].

[0017] The second control unit can transition the first control unit to the first startup state by switching the switching unit to the first output state as a first startup instruction process and supplying power from the energy storage unit to the second input unit.

[0018] [5] The second control unit transmits a first start signal to the first control unit as the first start instruction process. When the first control unit receives the first startup signal, it transitions to the first startup state and switches the switch unit to the ON state. The in-vehicle control device described in [2] or [3].

[0019] The second control unit can transition the first control unit to the first startup state by transmitting a first startup signal to the first control unit as a first startup instruction process.

[0020] [6] The activation condition is that the service plug is connected to the connection target. An in-vehicle control device as described in any of [2] to [5].

[0021] With this configuration, the first control unit can transition to a first startup state when the service plug is connected to the target unit, and return the switch unit to the ON state.

[0022] [7] The activation condition is that the second control unit receives an ON instruction signal transmitted from a terminal device capable of communicating with the vehicle. An in-vehicle control device as described in any of [2] to [5].

[0023] With this configuration, the operator can switch the first control unit to the first startup state and return the switch unit to the ON state by operating the terminal device to send an ON instruction signal.

[0024] [8] The vehicle is, Load and The system includes a second voltage conversion unit that performs a conversion operation to boost or lower the voltage input from the high-voltage battery and output it to the load side, The service plug interrupts the output current of the second voltage converter when it is removed from the connection target. The control unit stops the second voltage converter when it determines that the service plug has interrupted the output current of the second voltage converter. An in-vehicle control device as described in any of [1] to [7].

[0025] If the second voltage converter continues to operate even when the service plug has interrupted the output current of the second voltage converter, the second voltage converter will consume power unnecessarily. The control unit stops the second voltage converter when it determines that the service plug has interrupted the output current of the second voltage converter, thereby suppressing the unnecessary power consumption caused by the operation of the second voltage converter.

[0026] [9] The aforementioned vehicle is Load and The system includes a second voltage conversion unit that performs a conversion operation to boost or lower the voltage input from the high-voltage battery and output it to the load side, The service plug interrupts the output current of the second voltage converter when it is removed from the connection target. The control unit has a third control unit that controls the second voltage conversion unit, The third control unit switches between a second startup state and a second power-saving state which consumes less power than the second startup state, and when the service plug interrupts the output current of the second voltage converter, it stops the second voltage converter, and then transitions from the second startup state to the second power-saving state. The second control unit repeatedly determines whether the startup conditions have been met using the power supplied from the energy storage unit after the service plug has interrupted the output current of the second voltage conversion unit, and if it determines that the startup conditions have been met, it performs a second startup instruction process to switch the third control unit to the second startup state. The third control unit transitions to the second startup state when the second startup instruction process is performed, and causes the second voltage conversion unit to perform the conversion operation. An in-vehicle control device as described in any of [2] to [7].

[0027] The third control unit can suppress power consumption by transitioning to a second power-saving state when the second voltage conversion unit is stopped. Furthermore, when the startup conditions are met, the third control unit can transition to a second startup state and restart the conversion operation of the second voltage conversion unit.

[0028]

[10] A switching section is provided between the branch path that branches off from the conductive path provided on the side of the first voltage conversion section that is closer to the switch section and the energy storage section, The switching unit switches between an allowable state that permits the flow of current between the branch circuit and the energy storage unit, and an interruption state that interrupts the flow of current between the branch circuit and the energy storage unit. The second control unit, when the service plug interrupts the output current of the second voltage conversion unit, switches the switching unit from the allowable state to the interrupted state, repeatedly determines whether the startup condition has been met using the power supplied from the energy storage unit, and performs the second startup instruction process if it determines that the startup condition has been met. The in-vehicle control device described in [9].

[0029] The second control unit can repeatedly determine whether the startup conditions have been met while preventing the power from the energy storage unit from being released into the branch circuit by switching the switching unit to the off state when the service plug interrupts the output current of the second voltage conversion unit.

[0030]

[11] The third control unit has a third input unit to which power is supplied from the high-voltage battery, and a fourth input unit provided separately from the third input unit, The switching unit switches between a stopped state in the interrupted state, which stops the output from the energy storage unit to the fourth input unit, and a second output state, which allows power supply from the energy storage unit to the fourth input unit. The second control unit, when the service plug interrupts the output current of the second voltage conversion unit, switches the switching unit from the allowable state to the stopped state, repeatedly determines whether the start condition has been met using the power supplied from the energy storage unit, and when it determines that the start condition has been met, switches the switching unit from the stopped state to the second output state as a second start instruction process. The third control unit transitions to the second startup state when power is supplied to the fourth input unit, and causes the second voltage conversion unit to perform the conversion operation. The in-vehicle control device described in

[10] .

[0031] The second control unit can transition the third control unit to the second startup state by switching the switching unit to the second output state as a second startup instruction process and supplying power from the energy storage unit to the fourth input unit.

[0032]

[12] The second control unit transmits a second start signal to the third control unit as the second start instruction process. The third control unit, upon receiving the second startup signal, transitions to the second startup state and causes the second voltage conversion unit to perform the conversion operation. The in-vehicle control device described in [9].

[0033] The second control unit can transition the third control unit to the second startup state by transmitting a second startup signal to the third control unit as a second startup instruction process.

[0034] [Details of the embodiments of this disclosure] 1. First Embodiment 1-1. Configuration of Vehicle 1 Figure 1 discloses a vehicle 1 including an in-vehicle control device 30 according to a first embodiment. Vehicle 1 is, for example, a hybrid vehicle or an electric vehicle.

[0035] Vehicle 1 comprises a low-voltage battery 11, a high-voltage battery 12, a first voltage conversion unit 13, a switch unit 14, a load 15, a second voltage conversion unit 16, a connection target unit 17, a service plug 18, a housing 19, a first conductive path 21, a second conductive path 22, a third conductive path 23, a fourth conductive path 24, a fifth conductive path 25, a sixth conductive path 26, a branch path 28, and a ground 29.

[0036] The low-voltage battery 11 is, for example, an auxiliary battery. The low-voltage battery 11 is composed of, for example, a lithium-ion battery. The negative terminal of the low-voltage battery 11 is electrically connected to ground 29. The output voltage of the low-voltage battery 11 is lower than the output voltage of the high-voltage battery 12. The low-voltage battery 11 is housed in the enclosure 19.

[0037] The high-voltage battery 12 is, for example, the main battery. The high-voltage battery 12 is composed of, for example, a lithium-ion battery.

[0038] The first voltage conversion unit 13 is installed between the low-voltage battery 11 and the high-voltage battery 12. The first voltage conversion unit 13 performs a boost operation, increasing the voltage input from the low-voltage battery 11 and outputting it to the high-voltage battery 12. The first voltage conversion unit 13 also performs a step-down operation, decreasing the voltage input from the high-voltage battery 12 and outputting it to the low-voltage battery 11. The first voltage conversion unit 13 is configured, for example, by a DC-DC converter. In this embodiment, the first voltage conversion unit 13 performs a boost or step-down operation when the vehicle's start switch is ON, and stops when the vehicle's start switch is OFF.

[0039] The switch unit 14 is provided between the low-voltage battery 11 and the first voltage conversion unit 13. The switch unit 14 switches between an ON state, which allows current to flow from the low-voltage battery 11 to the first voltage conversion unit 13 through it, and an OFF state, which prevents current from flowing from the low-voltage battery 11 to the first voltage conversion unit 13 through it. When the switch unit 14 is in the OFF state, it stops the output from the low-voltage battery 11 to the outside of the housing 19.

[0040] The second voltage conversion unit 16 is provided between the high-voltage battery 12 and the load 15. The second voltage conversion unit 16 is provided between the third conductive path 23, which is provided between the high-voltage battery 12 and the first voltage conversion unit 13, and the load 15. The second voltage conversion unit 16 performs a conversion operation to boost or lower the voltage input from the high-voltage battery 12 side and output it to the load 15 side. The second voltage conversion unit 16 is configured, for example, by a DC-DC converter. In this embodiment, the second voltage conversion unit 16 can always perform the conversion operation regardless of the on / off state of the vehicle 1's start switch.

[0041] The connection target section 17 is located in a conductive path to which power is supplied from the high-voltage battery 12, and is the part to which the service plug 18 is connected. In this embodiment, the connection target section 17 is located in a fourth conductive path 24 provided between the second voltage conversion unit 16 and the load 15.

[0042] When the service plug 18 is connected to the connection target 17, it allows current to flow from the high-voltage battery 12 to the connection target 17. In other words, when the service plug 18 is connected to the connection target 17, it allows the output current of the second voltage conversion unit 16 to flow to the connection target 17.

[0043] When the service plug 18 is disconnected from the connection target 17, it cuts off the power supply from the high-voltage battery 12. Note that the service plug 18 does not need to cut off all power from the high-voltage battery 12; it is sufficient if it can cut off at least a portion of the power supply. In this embodiment, the service plug 18 cuts off the output current of the second voltage conversion unit 16.

[0044] The first conductive path 21 is provided between the low-voltage battery 11 and the switch unit 14. One end of the first conductive path 21 is electrically connected to the positive terminal of the low-voltage battery 11. The other end of the first conductive path 21 is electrically connected to one end of the switch unit 14.

[0045] The second conductive path 22 is provided between the switch unit 14 and the first voltage conversion unit 13. One end of the second conductive path 22 is electrically connected to the other end of the switch unit 14. The other end of the second conductive path 22 is electrically connected to one end of the first voltage conversion unit 13.

[0046] The third conductive path 23 is provided between the first voltage conversion unit 13 and the high-voltage battery 12. One end of the third conductive path 23 is electrically connected to the other end of the first voltage conversion unit 13. The other end of the third conductive path 23 is electrically connected to the positive terminal of the high-voltage battery 12. One end of the second voltage conversion unit 16 is electrically connected to the third conductive path 23.

[0047] The fourth conductive path 24 is provided between the second voltage conversion unit 16 and the load 15. One end of the fourth conductive path 24 is electrically connected to the other end of the second voltage conversion unit 16. The other end of the fourth conductive path 24 is electrically connected to one end of the load 15. The other end of the load 15 is electrically connected to ground 29.

[0048] 1-2. Configuration of the in-vehicle control device 30 The in-vehicle control device 30 comprises a power storage unit 31, a switching unit 32, voltage detection units 33 and 34, and a control unit 40.

[0049] The energy storage unit 31 is composed of energy storage elements such as capacitors. The energy storage unit 31 is electrically connected to the second conductive path 22 via the switching unit 32. A fifth conductive path 25 is provided between the energy storage unit 31 and the switching unit 32. One end of the energy storage unit 31 is electrically connected to one end of the fifth conductive path 25. The other end of the energy storage unit 31 is electrically connected to the ground 29. The energy storage unit 31 is charged by power supplied from the low-voltage battery 11 via the ON switch unit 14.

[0050] The switching unit 32 is provided between the branch path 28, which branches off from the second conductive path 22, and the energy storage unit 31. The switching unit 32 switches between an allowable state, which permits the flow of current between the branch path 28 and the energy storage unit 31, and an interruption state, which interrupts the flow of current between the branch path 28 and the energy storage unit 31.

[0051] The switching unit 32 has a first terminal T1, a second terminal T2, a third terminal T3, and a fourth terminal T4. The first terminal T1 is electrically connected to the other end of the fifth conductive path 25. The second terminal T2 is electrically connected to the branch path 28 that branches off from the second conductive path 22. The third terminal T3 is a terminal for stopping the output of the energy storage unit 31 via the switching unit 32. The fourth terminal T4 is electrically connected to one end of the sixth conductive path 26. The switching unit 32 switches to a state in which the first terminal T1 is selectively connected to one of the second terminal T2, the third terminal T3, or the fourth terminal T4. By switching the first terminal T1 to the second terminal T2, the switching unit 32 electrically connects the fifth conductive path 25 to the branch path 28. By switching the first terminal T1 to the third terminal T3, the switching unit 32 stops the output of the energy storage unit 31 via itself. The switching unit 32 electrically connects the fifth conductive path 25 to the sixth conductive path 26 by connecting the first terminal T1 to the fourth terminal T4. The allowable state is when the first terminal T1 is connected to the second terminal T2. The interrupted state is when the first terminal T1 is connected to the third terminal T3, and when the first terminal T1 is connected to the fourth terminal T4.

[0052] The control unit 40 controls the first voltage conversion unit 13, the switch unit 14, the second voltage conversion unit 16, and the switching unit 32. The control unit 40 has a first control unit 41, a second control unit 42, and a third control unit 43. The first control unit 41, the second control unit 42, and the third control unit 43 are each configured as separate control circuits. Each of the first control unit 41, the second control unit 42, and the third control unit 43 is configured, for example, by a microcomputer. The second control unit 42 can communicate with the first control unit 41 and the third control unit 43.

[0053] The voltage detection units 33 and 34 detect the voltage of the ground 29. The voltage detection units 33 and 34 are configured, for example, by known voltage detection circuits. The voltage detection units 33 and 34 output signals indicating the detection result.

[0054] The first control unit 41 controls the switch unit 14. The first control unit 41 is electrically connected to the first conductive path 21 and operates by receiving power from the low-voltage battery 11 via the first conductive path 21. The first control unit 41 has a first input unit 41A and a second input unit 41B. The first input unit 41A is an input terminal electrically connected to the first conductive path 21. The first input unit 41A is electrically connected to the first conductive path 21. Power is supplied to the first input unit 41A from the low-voltage battery 11 via the first conductive path 21. The second input unit 41B is an input terminal provided separately from the first input unit 41A. The second input unit 41B is electrically connected to the other end of the sixth conductive path 26.

[0055] The first control unit 41 switches between a first startup state and a first power-saving state which consumes less power than the first startup state. In the first startup state, the first control unit 41 determines whether or not to switch the on / off state of the switch unit 14 and performs the process of switching the on / off state of the switch unit 14. In the first power-saving state, the first control unit 41 does not determine whether or not to switch the on / off state of the switch unit 14 or perform the process of switching the on / off state of the switch unit 14.

[0056] The switching unit 32 described above switches between a stopped state, in which the output from the energy storage unit 31 to the second input unit 41B is stopped, and a first output state, in which power supply from the energy storage unit 31 to the second input unit 41B is permitted. The stopped state is when the first terminal T1 is connected to the third terminal T3. The first output state is when the first terminal T1 is connected to the fourth terminal T4. In the first output state, power is supplied from the energy storage unit 31 to the second input unit 41B of the first control unit 41.

[0057] The second control unit 42 controls the first voltage conversion unit 13 and the switching unit 32. The control circuit for controlling the first voltage conversion unit 13 and the control circuit for controlling the switching unit 32 may be different. The second control unit 42 is electrically connected to the fifth conductive path 25 and operates by receiving power from the energy storage unit 31 via the fifth conductive path 25. Therefore, the second control unit 42 can receive power from the energy storage unit 31 regardless of the state of the switching unit 32.

[0058] The third control unit 43 controls the second voltage conversion unit 16. The third control unit 43 operates by receiving power from the high-voltage battery 12. The third control unit 43 is electrically connected to the third conductive path 23 and receives power from the high-voltage battery 12 via the third conductive path 23.

[0059] The switch unit 14 and the first control unit 41 are located inside the housing 19. The first voltage conversion unit 13, the second voltage conversion unit 16, the connection target unit 17, the service plug 18, the energy storage unit 31, the switching unit 32, the second control unit 42, and the third control unit 43 are located outside the housing 19.

[0060] 1-3. Operation of the in-vehicle control device 30 When the start switch of vehicle 1 is ON, the first control unit 41 controls the switch unit 14 to the ON state. The second control unit 42 controls the switching unit 32 to the allow state and causes the first voltage conversion unit 13 to perform a voltage boosting or voltage bucking operation. The third control unit 43 causes the second voltage conversion unit 16 to perform a conversion operation.

[0061] When the start switch is turned off, the second control unit 42 stops the first voltage conversion unit 13. The second control unit 42 determines the on / off state of the start switch by, for example, receiving an on / off signal from an external source that indicates the on / off state of the start switch. Other operations are the same as when the start switch is on.

[0062] When the start switch is in the off state, the process shown in Figure 2 is performed. The first control unit 41 determines whether the service plug 18 has been disconnected from the connection target unit 17 (step S11). When the service plug 18 is connected to the connection target unit 17, the output current of the second voltage conversion unit 16 flows to the ground 29, and when the service plug 18 has been disconnected from the connection target unit 17, the output of the second voltage conversion unit 16 stops. Therefore, the voltage of the ground 29 changes depending on whether the service plug 18 has been disconnected from the connection target unit 17 or not. Based on the voltage of the ground 29, the first control unit 41 determines whether the service plug 18 has been disconnected from the connection target unit 17. Based on the signal output from the voltage detection unit 33, the first control unit 41 identifies the voltage of the ground 29.

[0063] If the first control unit 41 determines that the service plug 18 has not been unplugged from the connection target unit 17 (No in step S11), it returns to step S11. In other words, the first control unit 41 repeatedly performs the process in step S11 until it determines that the service plug 18 has been unplugged from the connection target unit 17. If the first control unit 41 determines that the service plug 18 has been unplugged from the connection target unit 17 (Yes in step S11), it switches the switch unit 14 to the off state (step S12) and transitions from the first startup state to the first power-saving state (step S13).

[0064] On the other hand, the second control unit 42 also determines whether the service plug 18 has been unplugged from the connection target unit 17 (step S21). The second control unit 42 determines whether the service plug 18 has been unplugged from the connection target unit 17 based on the voltage of the ground 29. The second control unit 42 identifies the voltage of the ground 29 based on the signal output from the voltage detection unit 34.

[0065] If the second control unit 42 determines that the service plug 18 has not been removed from the connection target unit 17 (No in step S21), it returns to step S21. In other words, the second control unit 42 repeatedly performs the process in step S21 until it determines that the service plug 18 has been removed from the connection target unit 17. If the second control unit 42 determines that the service plug 18 has been removed from the connection target unit 17 (Yes in step S21), it controls the switching unit 32 to switch the connection destination of the first terminal T1 from the second terminal T2 to the third terminal T3 (step S22).

[0066] As a result of these operations of the first control unit 41 and the second control unit 42, when the service plug 18 is unplugged from the connection target unit 17, as shown in Figure 3, the switch unit 14 is switched to the off state, and the output of the energy storage unit 31 via the switching unit 32 is stopped.

[0067] After step S22, the second control unit 42 uses the power supplied from the energy storage unit 31 to determine whether the service plug 18 is connected to the connection target unit 17 (step S23). The second control unit 42 determines whether the service plug 18 is connected to the connection target unit 17 based on the voltage of the ground 29.

[0068] If the second control unit 42 determines that the service plug 18 is not connected to the connection target unit 17 (No in step S23), it returns to step S23. In other words, the second control unit 42 repeatedly performs the process in step S23 until it determines that the service plug 18 is connected to the connection target unit 17. If the second control unit 42 determines that the service plug 18 is connected to the connection target unit 17 (Yes in step S23), it controls the switching unit 32 to switch the connection destination of the first terminal T1 from the third terminal T3 to the fourth terminal T4 (step S24). As a result, power is supplied from the energy storage unit 31 to the second input unit 41B of the first control unit 41.

[0069] The first control unit 41 receives power supply to the second input unit 41B and transitions to the first startup state (step S14). Then, the first control unit 41 switches the switch unit 14 to the ON state (step S15).

[0070] As a result of the operations of the first control unit 41 and the second control unit 42, the switch unit 14 is switched to the ON state when the service plug 18 is connected to the connection target unit 17, as shown in Figure 4.

[0071] 1-4. Operation and Effects of the First Embodiment When the control unit 40 of the in-vehicle control device 30 determines that the service plug 18 has been removed from the connected unit 17, it switches the switch unit 14, which is located between the low-voltage battery 11 and the first voltage conversion unit 13, to the OFF state. This stops the output from the low-voltage battery 11 to the outside of the housing 19. In other words, with this configuration, the output from the low-voltage battery 11 to the outside of the housing 19 can be stopped when the service plug 18 is removed.

[0072] When the service plug 18 is unplugged from the connection target unit 17, the first control unit 41 switches the switch unit 14 to the off state, and then transitions from the first startup state to the first power-saving state. After the service plug 18 is unplugged from the connection target unit 17, the second control unit 42 repeatedly determines whether the startup conditions have been met using the power supplied from the energy storage unit 31. When the second control unit 42 determines that the startup conditions have been met, it performs a first startup instruction process to switch the first control unit 41 to the first startup state. When the first startup instruction process is performed, the first control unit 41 transitions to the first startup state and switches the switch unit 14 to the on state. With this configuration, since the first control unit 41 switches the switch unit 14 to the off state and then transitions to the first power-saving state, the power consumption of the low-voltage battery 11 due to the operation of the first control unit 41 can be suppressed. Furthermore, when the startup conditions are met, the first control unit 41 can transition to the first startup state and return the switch unit 14 to the on state.

[0073] When the service plug 18 is unplugged from the connection target unit 17, the second control unit 42 switches the switching unit 32 from the allowable state to the shut-off state and repeatedly determines whether the startup conditions have been met using the power supplied from the energy storage unit 31. Then, when the second control unit 42 determines that the startup conditions have been met, it performs the first startup instruction process described above. With this configuration, when the service plug 18 is unplugged from the connection target unit 17, the second control unit 42 switches the switching unit 32 to the shut-off state, thereby preventing the power from the energy storage unit 31 from being released into the branch line 28, while repeatedly determining whether the startup conditions have been met.

[0074] When the service plug 18 is unplugged from the connection target unit 17, the second control unit 42 switches the switching unit 32 from the allow state to the stop state and repeatedly determines whether the startup conditions have been met using the power supplied from the energy storage unit 31. When the second control unit 42 determines that the startup conditions have been met, it switches the switching unit 32 from the stop state to the first output state as a first startup instruction process. The first control unit 41 transitions to the first startup state when power is supplied to the second input unit 41B and switches the switch unit 14 to the ON state. With this configuration, the second control unit 42 can transition the first control unit 41 to the first startup state by switching the switching unit 32 to the first output state as a first startup instruction process and supplying power from the energy storage unit 31 to the second input unit 41B.

[0075] In this embodiment, the activation condition is that the service plug 18 is connected to the connection target unit 17. With this configuration, the first control unit 41 can transition to the first activation state when the service plug 18 is connected to the connection target unit 17, and return the switch unit 14 to the ON state.

[0076] 2. Second Embodiment In the first embodiment, an example was described in which the switching unit 32 is switched to the first output state to supply power from the energy storage unit 31 to the second input unit 41B as a first startup instruction process for switching the first control unit 41 to the first startup state. In the second embodiment, an example is described in which a first startup signal is transmitted to the first control unit 41 as a first startup instruction process. In the second embodiment, the same reference numerals are used for components that are the same as in the first embodiment, and detailed explanations are omitted.

[0077] Figure 5 shows a vehicle 201 including the on-board control device 230 of the second embodiment. The vehicle 201 includes the on-board control device 230 instead of the on-board control device 30 described in the first embodiment. The on-board control device 230 includes a switching unit 232 instead of the switching unit 32 described in the first embodiment.

[0078] The switching unit 232 has a first terminal T1, a second terminal T2, and a third terminal T3. The switching unit 232 differs from the switching unit 32 described in the first embodiment in that it does not have a fourth terminal T4. The vehicle 201 does not have a sixth conductive path 26.

[0079] In the second embodiment, the process shown in Figure 6 is performed instead of the process shown in Figure 2 described in the first embodiment. In the process shown in Figure 6, the first control unit 41 performs the processes in steps S11, S12, and S13, as in the first embodiment. As a result, the first control unit 41 transitions to the first power-saving state. The second control unit 42 performs the processes in steps S21, S22, and S23, as in the first embodiment. Then, if the second control unit 42 determines that the service plug 18 has been connected to the connection target unit 17 (Yes in step S23), it transmits a first start signal to the first control unit 41 (step S224). When the first control unit 41 receives the first start signal, it transitions to the first start state (step S214) and switches the switch unit 14 to the ON state (step S15).

[0080] With this configuration, the second control unit 42 can transition the first control unit 41 to the first startup state by transmitting a first startup signal to the first control unit 41 as a first startup instruction process.

[0081] 3. Third Embodiment In the first and second embodiments, examples were described in which the second voltage conversion unit 16 continues to operate even after the service plug 18 is removed from the connection target unit 17. In the third embodiment, an example is described in which the second voltage conversion unit 16 stops when the service plug 18 is removed from the connection target unit 17. In the third embodiment, the same reference numerals are used for the same components as in the second embodiment, and detailed explanations are omitted.

[0082] 3-1. Configuration of Vehicle 301 Figure 7 shows a vehicle 301 including the on-board control device 330 of the third embodiment. The vehicle 301 includes the on-board control device 330 instead of the on-board control device 230 described in the second embodiment. The on-board control device 330 includes a switching unit 332 instead of the switching unit 232 described in the second embodiment.

[0083] The switching unit 332 has a first terminal T1, a second terminal T2, a third terminal T3, and a fifth terminal T5. The switching unit 332 differs from the switching unit 232 described in the second embodiment in that it has a fifth terminal T5. The vehicle 301 is equipped with a seventh conductive path 27. The fifth terminal T5 is electrically connected to one end of the seventh conductive path 27.

[0084] The third control unit 43 has a third input unit 43A to which power is supplied from the high-voltage battery 12, and a fourth input unit 43B provided separately from the third input unit 43A. The third input unit 43A is electrically connected to the third conductive path 23. The fourth input unit 43B is electrically connected to the other end of the seventh conductive path 27. Power is supplied to the fourth input unit 43B from the energy storage unit 31 via the seventh conductive path 27.

[0085] The third control unit 43 switches between a second startup state and a second power-saving state, which consumes less power than the second startup state. In the second startup state, the third control unit 43 controls the operation of the second voltage conversion unit 16. In the second power-saving state, the third control unit 43 does not control the operation of the second voltage conversion unit 16.

[0086] The switching unit 332 electrically connects the fifth conductive path 25 to the seventh conductive path 27 by connecting the first terminal T1 to the fifth terminal T5. In the interrupted state, the switching unit 332 switches between a stopped state, which stops the output from the energy storage unit 31 to the fourth input unit 43B, and a second output state, which allows power supply from the energy storage unit 31 to the fourth input unit 43B. The stopped state is when the first terminal T1 is connected to the third terminal T3. The second output state is when the first terminal T1 is connected to the fifth terminal T5. In the second output state, power is supplied from the energy storage unit 31 to the fourth input unit 43B of the third control unit 43.

[0087] Vehicle 301 is equipped with a voltage detection unit 35. The voltage detection unit 35 detects the voltage of the fourth conductive path 24 on the second voltage conversion unit 16 side of the connection target unit 17. The voltage detection unit 35 is configured, for example, by a known voltage detection circuit. The voltage detection unit 35 outputs a signal indicating the detection result.

[0088] 3-2. Operation of the in-vehicle control device 330 In the third embodiment, the process shown in Figure 8 is performed instead of the process shown in Figure 6 described in the second embodiment. In the process shown in Figure 8, the operation of the first control unit 41 is the same as in the second embodiment.

[0089] In the process shown in Figure 8, the third control unit 43 first determines whether the service plug 18 has been removed from the connection target unit 17 (step S331). When the second voltage conversion unit 16 is performing a conversion operation, the detected value of the voltage detection unit 35 changes depending on whether the service plug 18 has been removed from the connection target unit 17. Based on the signal output from the voltage detection unit 35, the third control unit 43 determines whether the service plug 18 has been removed from the connection target unit 17.

[0090] If the third control unit 43 determines that the service plug 18 has not been unplugged from the connection target unit 17 (No in step S331), it returns to step S331. In other words, the third control unit 43 repeatedly performs the process in step S331 until it determines that the service plug 18 has been unplugged from the connection target unit 17. If the third control unit 43 determines that the service plug 18 has been unplugged from the connection target unit 17 (Yes in step S331), it stops the second voltage conversion unit 16 (step S332) and transitions from the second startup state to the second power saving state (step S333).

[0091] If the second voltage conversion unit 16 stops when the service plug 18 is disconnected from the connection target unit 17, then when the service plug 18 is subsequently connected to the connection target unit 17, there will be no change in the voltage of the ground 29. Therefore, the second control unit 42 cannot determine that the service plug 18 has been connected to the connection target unit 17 based on the voltage of the ground 29. Accordingly, in the third embodiment, the second control unit 42 determines that the startup condition has been met when it receives an ON instruction signal transmitted from a terminal device 90 that can communicate with the vehicle 301. The terminal device 90 is, for example, a diagnostic device such as OBD (On-Board Diagnostics) or a mobile terminal such as a smartphone. The terminal device 90 is operated by an operator. The terminal device 90 transmits an ON instruction signal when the operator performs an ON instruction operation.

[0092] The second control unit 42 performs the processing in steps S21 and S22, similar to the second embodiment. After that, the second control unit 42 uses the power supplied from the energy storage unit 31 to determine whether or not it has received an ON instruction signal from the terminal device 90 (step S323). If the second control unit 42 determines that it has not received an ON instruction signal (No in step S323), it returns to step S323. In other words, the second control unit 42 repeatedly performs the processing in step S323 until it determines that it has received an ON instruction signal.

[0093] If the second control unit 42 determines that it has received an ON instruction signal (Yes in step S323), it sends a first start signal to the first control unit 41 (step S224) and switches the connection destination of the first terminal T1 from the third terminal T3 to the fifth terminal T5 (step S325). As a result, power is supplied from the energy storage unit 31 to the fourth input unit 43B of the third control unit 43. Note that the order of steps S224 and S325 may be reversed.

[0094] The third control unit 43 receives power supply to the fourth input unit 43B and transitions to the second startup state (step S334). Then, the third control unit 43 causes the second voltage conversion unit 16 to perform a conversion operation (step S335).

[0095] 3-3. Operation and Effects of the Third Embodiment The control unit 40 stops the second voltage conversion unit 16 when it determines that the service plug 18 has interrupted the output current of the second voltage conversion unit 16, thereby suppressing unnecessary power consumption caused by the operation of the second voltage conversion unit 16.

[0096] The third control unit 43 stops the second voltage converter 16 when the service plug 18 interrupts the output current of the second voltage converter 16. After that, the third control unit 43 transitions from the second startup state to the second power-saving state. After the service plug 18 interrupts the output current of the second voltage converter 16, the second control unit 42 repeatedly determines whether the startup conditions have been met using the power supplied from the energy storage unit 31, and if it determines that the startup conditions have been met, it performs a second startup instruction process to switch the third control unit 43 to the second startup state. When the second startup instruction process is performed, the third control unit 43 transitions to the second startup state and causes the second voltage converter 16 to perform the conversion operation. With this configuration, the power consumption of the third control unit 43 can be suppressed by transitioning to the second power-saving state when the second voltage converter 16 is stopped. Furthermore, the third control unit 43 can transition to the second startup state and restart the conversion operation of the second voltage converter 16 when the startup conditions are met.

[0097] In this embodiment, the activation condition is that the second control unit 42 receives an ON instruction signal transmitted from the terminal device 90. With this configuration, the operator can operate the terminal device 90 to transmit an ON instruction signal, thereby switching the first control unit 41 to the first activation state and returning the switch unit 14 to the ON state. In addition, the third control unit 43 can be switched to the second activation state, causing the second voltage conversion unit 16 to perform a conversion operation.

[0098] When the service plug 18 interrupts the output current of the second voltage conversion unit 16, the second control unit 42 switches the switching unit 32 from the allowable state to the interrupted state and repeatedly determines whether the starting conditions have been met using the power supplied from the energy storage unit 31. Then, when the second control unit 42 determines that the starting conditions have been met, it performs the second starting instruction process. With this configuration, when the service plug 18 interrupts the output current of the second voltage conversion unit 16, the second control unit 42 switches the switching unit 32 to the interrupted state, thereby preventing the power from the energy storage unit 31 from being released into the branch line 28, while repeatedly determining whether the starting conditions have been met.

[0099] The second control unit 42 switches the switching unit 32 from the stopped state to the second output state as a second startup instruction process. The third control unit 43 transitions to the second startup state when power is supplied to the fourth input unit 43B and causes the second voltage conversion unit 16 to perform a conversion operation. With this configuration, the second control unit 42 can transition the third control unit 43 to the second startup state by switching the switching unit 32 to the second output state as a second startup instruction process and supplying power from the energy storage unit 31 to the fourth input unit 43B.

[0100] 4. Fourth Embodiment In the third embodiment, an example was described in which, as a second startup instruction process for switching the third control unit 43 to the second startup state, the switching unit 32 is switched to the second output state to supply power from the energy storage unit 31 to the fourth input unit 43B. In the fourth embodiment, an example was described in which, as a second startup instruction process, a second startup signal is transmitted to the third control unit 43. In the fourth embodiment, the same reference numerals are used for components that are the same as in the third embodiment, and detailed explanations are omitted.

[0101] Figure 9 shows a vehicle 401 including the on-board control device 430 of the fourth embodiment. The vehicle 401 includes the on-board control device 430 instead of the on-board control device 330 described in the third embodiment. The on-board control device 430 includes a switching unit 432 instead of the switching unit 332 described in the third embodiment. The switching unit 432 has the same configuration as the switching unit 232 described in the second embodiment. The vehicle 401 does not include the seventh conductive path 27.

[0102] In the fourth embodiment, the process shown in Figure 10 is performed instead of the process shown in Figure 8 described in the third embodiment. In the process shown in Figure 10, the operation of the first control unit 41 is the same as in the third embodiment.

[0103] The second control unit 42 performs the processing in steps S21, S22, S323, and S224, similar to the third embodiment. After that, the second control unit 42 transmits a second start signal to the third control unit 43 (step S425). Note that the order of steps S224 and S425 may be reversed.

[0104] The third control unit 43 performs the processing in steps S331, S332, and S333, similar to the third embodiment. Then, when the third control unit 43 receives the second start signal, it transitions to the second start state (step S434). The third control unit 43 then causes the second voltage conversion unit 16 to perform the second voltage conversion (step S335).

[0105] With this configuration, the second control unit 42 can cause the third control unit 43 to transition to the second startup state by transmitting a second startup signal to the third control unit 43 as a second startup instruction process.

[0106] <Other Embodiments> This disclosure is not limited to the embodiments described above and in the drawings. For example, any combination of the features of the embodiments described above or below is possible as long as it does not contradict each other. Furthermore, any feature of the embodiments described above or below may be omitted unless explicitly stated as essential. In addition, the embodiments described above may be modified as follows.

[0107] A configuration in the first embodiment in which the switching unit is switched from the stopped state to the first output state as the first startup instruction process may be combined with a configuration in the third embodiment in which the switching unit is switched from the stopped state to the second output state as the second startup instruction process. In this case, for example, switches may be provided between the first terminal and the fourth terminal, and between the first terminal and the fifth terminal, and the first output state and the second output state may be achieved when both switches are switched to the ON state.

[0108] The embodiments disclosed herein should be considered in all respects to be illustrative and not restrictive. The scope of the present invention is not limited to the embodiments disclosed herein, but is indicated by the claims, and all modifications within the meaning and scope equivalent to the claims are intended to be included.

[0109] (Note) This disclosure may include the following embodiments for solving the following problems.

[0110] (assignment) Japanese Patent Publication No. 2024-91685 discloses an electric vehicle comprising a first battery that supplies power to high-voltage onboard equipment and a second battery that supplies power to low-voltage onboard equipment. The first battery is provided with a service plug that can shut off the high voltage without the use of tools.

[0111] Consider the case where the service plug is positioned as follows: A voltage conversion unit is provided between the high-voltage battery and the load. The voltage conversion unit boosts or lowers the voltage input from the high-voltage battery and outputs it to the load. The service plug is positioned to interrupt the output current of the voltage conversion unit. In this configuration, if the output current of the voltage conversion unit is interrupted by the service plug, it is preferable to stop the voltage conversion unit from the viewpoint of suppressing power consumption.

[0112] This disclosure aims to provide a technology that can stop a voltage converter when the output current of the voltage converter is interrupted by a service plug.

[0113] (Appearance) [1] An in-vehicle control device included in a vehicle, comprising: a low-voltage battery; a high-voltage battery; a first voltage converter that performs a voltage boosting operation to boost the voltage input from the low-voltage battery and output it to the high-voltage battery; a load; a second voltage converter that performs a voltage boosting or de-voltage conversion operation to boost the voltage input from the high-voltage battery and output it to the load; and a service plug that interrupts the output current of the second voltage converter, The system includes a control unit that controls the second voltage conversion unit, The control unit stops the second voltage converter when it determines that the service plug has interrupted the output current of the second voltage converter. In-vehicle control device.

[0114] When the service plug interrupts the output current of the second voltage converter, the second voltage converter will consume power unnecessarily. The control unit, upon determining that the service plug has interrupted the output current of the second voltage converter, stops the second voltage converter, thereby suppressing the unnecessary power consumption caused by the operation of the second voltage converter.

[0115] [2] The vehicle comprises a housing for the low-voltage battery and a switch between the low-voltage battery and the first voltage conversion unit for stopping the output from the low-voltage battery to the outside of the housing. The switch unit switches to the off state when the service plug interrupts the output current of the second voltage conversion unit. Furthermore, it includes a power storage unit provided on the outside of the housing, The power storage unit is charged by power supplied from the low-voltage battery via the switch unit, which is in the ON state. The control unit, A second control unit which operates using power supplied from the power storage unit when the switch unit is in the off state, It includes a third control unit that controls the second voltage conversion unit, The third control unit operates by receiving power from the high-voltage battery, and switches between a second startup state and a second power-saving state which consumes less power than the second startup state. When the service plug interrupts the output current of the second voltage converter, the second voltage converter is stopped, and then the unit transitions from the second startup state to the second power-saving state. The second control unit repeatedly determines whether the startup conditions have been met using the power supplied from the energy storage unit after the service plug has interrupted the output current of the second voltage conversion unit, and if it determines that the startup conditions have been met, it performs a second startup instruction process to switch the third control unit to the second startup state. The third control unit transitions to the second startup state when the second startup instruction process is performed, and causes the second voltage conversion unit to perform the conversion operation. The in-vehicle control device described in [1].

[0116] The third control unit can suppress power consumption by transitioning to a second power-saving state when the second voltage conversion unit is stopped. Furthermore, when the startup conditions are met, the third control unit can transition to a second startup state and restart the conversion operation of the second voltage conversion unit.

[0117] [3] A switching section is provided between a branch path that branches off from a conductive path provided on the side of the first voltage conversion section that is closer to the switch section and the energy storage section, The switching unit switches between an allowable state that permits the flow of current between the branch circuit and the energy storage unit, and an interruption state that interrupts the flow of current between the branch circuit and the energy storage unit. The second control unit, when the service plug interrupts the output current of the second voltage conversion unit, switches the switching unit from the allowable state to the interrupted state, repeatedly determines whether the startup condition has been met using the power supplied from the energy storage unit, and performs the second startup instruction process if it determines that the startup condition has been met. The vehicle-mounted control device described in [2].

[0118] The second control unit can repeatedly determine whether the startup conditions have been met while preventing the power from the energy storage unit from being released into the branch circuit by switching the switching unit to the off state when the service plug interrupts the output current of the second voltage conversion unit.

[0119] [4] The third control unit has a third input unit to which power is supplied from the high-voltage battery, and a fourth input unit provided separately from the third input unit, The switching unit switches between a stopped state in the interrupted state, which stops the output from the energy storage unit to the fourth input unit, and a second output state, which allows power supply from the energy storage unit to the fourth input unit. The second control unit, when the service plug interrupts the output current of the second voltage conversion unit, switches the switching unit from the allowable state to the stopped state, repeatedly determines whether the start condition has been met using the power supplied from the energy storage unit, and when it determines that the start condition has been met, switches the switching unit from the stopped state to the second output state as a second start instruction process. The third control unit transitions to the second startup state when power is supplied to the fourth input unit, and causes the second voltage conversion unit to perform the conversion operation. The in-vehicle control device described in [3].

[0120] The second control unit can transition the third control unit to the second startup state by switching the switching unit to the second output state as a second startup instruction process and supplying power from the energy storage unit to the fourth input unit.

[0121] [5] The second control unit transmits a second start signal to the third control unit as the second start instruction process. The third control unit, upon receiving the second startup signal, transitions to the second startup state and causes the second voltage conversion unit to perform the conversion operation. The in-vehicle control device described in [2] or [3].

[0122] The second control unit can transition the third control unit to the second startup state by transmitting a second startup signal to the third control unit as a second startup instruction process.

[0123] [6] The activation condition is that the state in which the service plug interrupts the output current of the second voltage converter is released. An in-vehicle control device as described in any of [2] to [5].

[0124] With this configuration, the third control unit can transition to the second startup state when the service plug is released from the state in which it has interrupted the output current of the second voltage converter, and can restart the conversion operation of the second voltage converter.

[0125] [7] The activation condition is that the second control unit receives an ON instruction signal transmitted from a terminal device capable of communicating with the vehicle. An in-vehicle control device as described in any of [2] to [5].

[0126] With this configuration, the operator can operate the terminal device to send an ON instruction signal, thereby switching the third control unit to the second startup state and restarting the conversion operation in the second voltage conversion unit. [Explanation of Symbols]

[0127] 1…Vehicle 11... Low-voltage battery 12… High-voltage battery 13…First voltage conversion section 14…Switch section 15…Load 16...Second voltage conversion section 17…Connection target section 18... Service plug 19… cabinet 21…First conductive path 22...Second conductive circuit 23…Third conductive circuit 24…Fourth conductive circuit 25…Fifth conductive circuit 26…6th conductive circuit 27…Seventh conductive path 28... Fork in the road 29... Grand 30…In-vehicle control devices 31…Energy storage unit 32…Switching section 33...Voltage detection unit 34...Voltage detection unit 35...Voltage detection unit 40... Control Unit 41...First Control Unit 41A...First input section 41B...Second input section 42...Second Control Unit 43...Third Control Unit 43A...Third input section 43B...4th input section 90…Terminal device 201... Vehicle 230... Vehicle-mounted control device 232... Switching section 301... Vehicle 330... Vehicle-mounted control device 332... Switching section 401... Vehicle 430... Vehicle-mounted control device 432... Switching section T1…First terminal T2…Second terminal T3…Third terminal T4…4th terminal T5…5th terminal

Claims

1. An in-vehicle control device included in a vehicle, comprising: a low-voltage battery; a high-voltage battery; a first voltage conversion unit that performs a voltage boosting operation to boost the voltage input from the low-voltage battery and output it to the high-voltage battery; a housing for the low-voltage battery; a switch unit between the low-voltage battery and the first voltage conversion unit that stops the output from the low-voltage battery to the outside of the housing; and a service plug that cuts off the power supply from the high-voltage battery when it is disconnected from the connected part, The system includes a control unit that controls the aforementioned switch section, The control unit, when it determines that the service plug has been removed from the connected unit, switches the switch unit to the OFF state. In-vehicle control device.

2. The control unit, A first control unit that controls the switch section, It has a second control unit provided separately from the first control unit, The first control unit operates within the housing, receiving power from the low-voltage battery, and switches between a first startup state and a first power-saving state which consumes less power than the first startup state. When the service plug is unplugged from the connected part, the switch unit is switched to the off state, and then the unit transitions from the first startup state to the first power-saving state. Furthermore, it includes a power storage unit provided on the outside of the housing, The power storage unit is charged by power supplied from the low-voltage battery via the switch unit, which is in the ON state. The second control unit is located outside the housing and, after the service plug is disconnected from the connection target, repeatedly determines whether the startup conditions have been met using the power supplied from the power storage unit, and if it determines that the startup conditions have been met, it performs a first startup instruction process to switch the first control unit to the first startup state. When the first start instruction process is performed, the first control unit transitions to the first start state and switches the switch unit to the ON state. The in-vehicle control device according to claim 1.

3. The system includes a switching section provided between a branch path that branches off from a conductive path located on the side of the first voltage conversion section that is closer to the switch section, and the energy storage section. The switching unit switches between an allowable state that permits the flow of current between the branch circuit and the energy storage unit, and an interruption state that interrupts the flow of current between the branch circuit and the energy storage unit. The second control unit, when the service plug is unplugged from the connection target unit, switches the switching unit from the allowable state to the disconnected state, repeatedly determines whether the startup condition has been met using the power supplied from the power storage unit, and performs the first startup instruction process if it determines that the startup condition has been met. The in-vehicle control device according to claim 2.

4. The first control unit has a first input unit to which power is supplied from the low-voltage battery, and a second input unit provided separately from the first input unit. The switching unit switches between a stopped state in the interrupted state, which stops the output from the energy storage unit to the second input unit, and a first output state, which allows power supply from the energy storage unit to the second input unit. The second control unit, when the service plug is unplugged from the connection target unit, switches the switching unit from the allowable state to the stopped state, repeatedly determines whether the start condition has been met using the power supplied from the energy storage unit, and when it is determined that the start condition has been met, switches the switching unit from the stopped state to the first output state as the first start instruction process. The first control unit transitions to the first startup state when power is supplied to the second input unit, and switches the switch unit to the ON state. The in-vehicle control device according to claim 3.

5. The second control unit transmits a first start signal to the first control unit as the first start instruction process. When the first control unit receives the first startup signal, it transitions to the first startup state and switches the switch unit to the ON state. The in-vehicle control device according to claim 2 or claim 3.

6. The activation condition is that the service plug is connected to the connection target. An in-vehicle control device according to any one of claims 2 to 4.

7. The activation condition is that the second control unit receives an ON instruction signal transmitted from a terminal device capable of communicating with the vehicle. An in-vehicle control device according to any one of claims 2 to 4.

8. The aforementioned vehicle is Load and The system includes a second voltage conversion unit that performs a conversion operation to boost or lower the voltage input from the high-voltage battery and output it to the load side. The service plug interrupts the output current of the second voltage converter when it is removed from the connection target. The control unit stops the second voltage converter when it determines that the service plug has interrupted the output current of the second voltage converter. The in-vehicle control device according to claim 1.

9. The aforementioned vehicle is Load and The system includes a second voltage conversion unit that performs a conversion operation to boost or lower the voltage input from the high-voltage battery and output it to the load side. The service plug interrupts the output current of the second voltage converter when it is removed from the connection target. The control unit has a third control unit that controls the second voltage conversion unit, The third control unit switches between a second startup state and a second power-saving state which consumes less power than the second startup state, and when the service plug interrupts the output current of the second voltage converter, it stops the second voltage converter, and then transitions from the second startup state to the second power-saving state. The second control unit repeatedly determines whether the startup conditions have been met using the power supplied from the energy storage unit after the service plug has interrupted the output current of the second voltage conversion unit, and if it determines that the startup conditions have been met, it performs a second startup instruction process to switch the third control unit to the second startup state. The third control unit transitions to the second startup state when the second startup instruction process is performed, and causes the second voltage conversion unit to perform the conversion operation. An in-vehicle control device according to any one of claims 2 to 4.

10. The system includes a switching section provided between a branch path that branches off from a conductive path located on the side of the first voltage conversion section that is closer to the switch section, and the energy storage section. The switching unit switches between an allowable state that permits the flow of current between the branch circuit and the energy storage unit, and an interruption state that interrupts the flow of current between the branch circuit and the energy storage unit. The second control unit, when the service plug interrupts the output current of the second voltage conversion unit, switches the switching unit from the allowable state to the interrupted state, repeatedly determines whether the startup condition has been met using the power supplied from the energy storage unit, and performs the second startup instruction process if it determines that the startup condition has been met. The in-vehicle control device according to claim 9.

11. The third control unit has a third input unit to which power is supplied from the high-voltage battery, and a fourth input unit provided separately from the third input unit. The switching unit switches between a stopped state in the interrupted state, which stops the output from the energy storage unit to the fourth input unit, and a second output state, which allows power supply from the energy storage unit to the fourth input unit. The second control unit, when the service plug interrupts the output current of the second voltage conversion unit, switches the switching unit from the allowable state to the stopped state, repeatedly determines whether the start condition has been met using the power supplied from the energy storage unit, and when it determines that the start condition has been met, switches the switching unit from the stopped state to the second output state as a second start instruction process. The third control unit transitions to the second startup state when power is supplied to the fourth input unit, and causes the second voltage conversion unit to perform the conversion operation. The in-vehicle control device according to claim 10.

12. The second control unit transmits a second start signal to the third control unit as the second start instruction process. The third control unit, upon receiving the second startup signal, transitions to the second startup state and causes the second voltage conversion unit to perform the conversion operation. The in-vehicle control device according to claim 9.

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