Control method and control device

Abstract

A control method and control device according to the present invention control a first relay and second relay provided on current paths for supplying power from a battery to a power electronic component. The first relay is provided on the current path between the positive-side terminal of the battery and the positive-side terminal of the power electronic component, and the second relay is provided on the current path between the negative-side terminal of the battery and the negative-side terminal of the power electronic component. Each time power supply starts, a controller controls the sequence of a first timing for turning on the first relay and a second timing for turning on the second relay.

Description

Control method and control device

[0001] The present disclosure relates to a control method and a control device.

[0002] A technology has been disclosed for a vehicle power supply device in which a DC-DC converter is controlled to charge a smoothing capacitor connected in parallel between the battery and an inverter circuit (high-voltage component) until the voltage from the battery's stored voltage reaches a predetermined allowable voltage range, and then a relay is closed to start the flow of electricity from the battery to the inverter circuit (see Patent Document 1).

[0003] Patent No. 3625789

[0004] According to the technology described in Patent Document 1, when current begins to flow from the battery to a high-voltage component, damage to the relay due to inrush current may occur depending on the accuracy of the voltage sensor in the DC-DC converter. In order to suppress the inrush current, it is necessary to improve the accuracy of the voltage sensor, which poses a problem that damage due to inrush current cannot be suppressed in the relay provided between the battery and the high-voltage component.

[0005] The present disclosure has been made in view of the above-mentioned problems, and an object of the present disclosure is to provide a control method and a control device that can suppress damage caused by inrush current in a relay provided between a battery and a high-voltage component.

[0006] In order to solve the above-mentioned problems, a control method and a control device according to the present disclosure control a first relay and a second relay provided on a current path for supplying power from a battery to a high-voltage component. The first relay is provided on the current path between a positive terminal of the battery and a positive terminal of the high-voltage component, and the second relay is provided on the current path between a negative terminal of the battery and a negative terminal of the high-voltage component. A controller controls the order of a first timing for turning on the first relay and a second timing for turning on the second relay each time power supply starts.

[0007] According to the present disclosure, damage caused by inrush current can be suppressed in a relay provided between a battery and a high-voltage component.

[0008] 1 is a block diagram illustrating a configuration of a system including a control device according to an embodiment of the present disclosure; FIG. 2 is a block diagram illustrating a configuration of a controller; and FIG. 3 is a flowchart illustrating processing of a control device according to an embodiment of the present disclosure.

[0009] Next, embodiments of the present disclosure will be described in detail with reference to the drawings. In the description, the same components are designated by the same reference numerals and redundant description will be omitted.

[0010] [System Configuration] Fig. 1 is a block diagram showing the configuration of a system including a control device according to an embodiment of the present disclosure. Fig. 2 is a block diagram showing the configuration of a controller. The control device includes a controller 10 that controls a first relay RL1 and a second relay RL2. The controller 10 may also control the charging device 30.

[0011] The first relay RL1 and the second relay RL2 are provided on a current path that supplies power from the battery BT to the high-voltage component SD.

[0012] The first relay RL1 is provided on a current path between the positive terminal TB1 of the battery BT and the positive terminal TS1 of the high voltage component SD. When the first relay RL1 is turned on, the positive terminal TB1 and the positive terminal TS1 are electrically connected, and when the first relay RL1 is turned off, the positive terminal TB1 and the positive terminal TS1 are electrically isolated.

[0013] The second relay RL2 is provided on a current path between the negative terminal TB2 of the battery BT and the negative terminal TS2 of the high voltage component SD. When the second relay RL2 is turned on, the positive terminal TB2 and the positive terminal TS2 are electrically connected, and when the second relay RL2 is turned off, the positive terminal TB2 and the positive terminal TS2 are electrically isolated.

[0014] A charging device 30 may be provided on the current path to receive auxiliary power from an auxiliary power source SBT different from the battery BT. More specifically, the charging device 30 is electrically connected between the positive terminal TS1 and the negative terminal TS2 of the high-voltage component SD. Before starting to supply power from the battery BT to the high-voltage component SD, the charging device 30 may charge the high-voltage component SD based on an instruction from the controller 10. For example, the charging device 30 may be a DC-DC converter.

[0015] Here, the charging device 30 may charge the high voltage component SD with auxiliary power based on a target potential difference set by the controller 10. The "target potential difference" will be described later.

[0016] The battery BT, the high-voltage component SD, the controller 10, and the charging device 30 may be mounted on a vehicle (not shown).

[0017] Additionally, the controller 10 may receive information transmitted from the current sensor AS, the upstream voltage sensor VS1, and the downstream voltage sensor VS2.

[0018] The current sensor AS measures the current flowing through the current path. In Fig. 1, the current sensor AS is provided on the current path between the positive terminal TB1 and the positive terminal TS1, but the current sensor AS may also be provided on the current path between the negative terminal TB2 and the negative terminal TS2. The value of the current measured by the current sensor AS is transmitted to the controller 10.

[0019] The upstream voltage sensor VS1 measures the upstream potential difference between the positive terminal TB1 and the negative terminal TB2 of the battery BT and outputs an upstream measurement value (a measurement value of the upstream potential difference). For example, the upstream voltage sensor VS1 is disposed on the current path closer to the battery BT (upstream side) than the first relay RL1 and the second relay RL2. The upstream measurement value measured by the upstream voltage sensor VS1 is transmitted to the controller 10. Note that the upstream measurement value is a measurement value of the upstream potential difference and may therefore include an error.

[0020] The downstream voltage sensor VS2 measures the downstream potential difference between the positive terminal TS1 and the negative terminal TS2 of the high electric power component SD and outputs a downstream measurement value (a measurement value of the downstream potential difference). For example, the downstream voltage sensor VS2 is disposed on the current path closer to the high electric power component SD (downstream) than the first relay RL1 and the second relay RL2. The downstream voltage sensor VS2 may be disposed in a position closer to the high electric power component SD or in a position closer to the charging device 30. The downstream measurement value measured by the downstream voltage sensor VS2 is transmitted to the controller 10. Note that the downstream measurement value is a measurement value of the downstream potential difference and may therefore include an error.

[0021] The charging device 30 may charge the high-voltage component SD until the downstream potential difference acquired by the downstream voltage sensor VS2 reaches a target potential difference. The charging device 30 charges the high-voltage component SD before starting to supply power from the battery BT to the high-voltage component SD.

[0022] The controller 10 controls the first relay RL1 and the second relay RL2. The controller 10 may also control the charging device 30.

[0023] For example, the controller 10 is a general-purpose computer equipped with a CPU (Central Processing Unit), a memory, and an input / output unit. A computer program (control program) is installed in the controller 10. By executing the computer program, the controller 10 functions as multiple information processing circuits (11, 13, 15, 17).

[0024] In this disclosure, an example is shown in which multiple information processing circuits (11, 13, 15, 17) are realized by software. However, it is also possible to configure the information processing circuits (11, 13, 15, 17) by preparing dedicated hardware for executing each of the information processes described below. Furthermore, the multiple information processing circuits (11, 13, 15, 17) may be configured by individual hardware.

[0025] The control program may be stored in a storage medium such as a non-transitory computer-readable medium, or may be distributed via a telecommunications line.

[0026] As shown in FIG. 2, the controller 10 includes an input / output unit 11, a timing setting unit 13, a calculation unit 15, and a target potential difference setting unit 17 as a plurality of information processing circuits (11, 13, 15, 17).

[0027] The input / output unit 11 receives signals from the current sensor AS, the upstream voltage sensor VS1, and the downstream voltage sensor VS2, and also transmits signals to the first relay RL1, the second relay RL2, and the charging device 30.

[0028] The timing setting unit 13 controls the order of the first timing for turning on the first relay RL1 and the second timing for turning on the second relay RL2 each time the supply of power from the battery BT to the high voltage component SD is started. When the supply of power is started, it is determined based on the set order which of the first relay RL1 and the second relay RL2 is turned on first.

[0029] More specifically, the timing setting unit 13 may obtain the peak current of the current via the current sensor AS each time the supply of power starts, and change the order based on the peak current.

[0030] The "peak current" is the value of the current when a current increase occurs at the later of the first and second timings. When both the first and second relays RL1 and RL2 are turned on, power supply from the battery BT to the high-voltage component SD begins, and if there is a difference between the upstream potential difference and the downstream potential difference, a sudden current occurs. This current increase is considered to be the "peak current."

[0031] Regarding the change of the order based on the peak current, for example, the timing setting unit 13 may change the order when the increase in the integrated value of the peak current after the last rearrangement of the order exceeds a predetermined increase amount. Here, the integrated value of the peak current is calculated by the calculation unit 15, which will be described later.

[0032] Here, when power is supplied such that the first timing precedes the second timing, "changing the order" means setting the order so that the second timing precedes the first timing in the next power supply. Also, when power is supplied such that the second timing precedes the first timing, "changing the order" means setting the order so that the first timing precedes the second timing in the next power supply.

[0033] Furthermore, the timing setting unit 13 may change the order when the peak current is equal to or greater than a predetermined current threshold.

[0034] Furthermore, the timing setting unit 13 may change the order when the difference between the upstream potential difference and the downstream potential difference before the start of power supply is equal to or greater than a predetermined voltage threshold. Also, the timing setting unit 13 may change the order every time power supply starts.

[0035] The set sequence (the sequence of the first timing for turning on the first relay RL1 and the second timing for turning on the second relay RL2) is stored in a permanent memory or the like and is used before the next power supply starts.

[0036] The timing setting unit 13 may determine whether or not to start supplying power based on a "supply start command" received from outside. For example, the "supply start command" is a command to electrically connect the battery BT and the high-voltage component SD and to start supplying power from the battery BT to the high-voltage component SD, and may be a command received from a user or a command received from a vehicle control device (not shown).

[0037] Alternatively, the time difference between the first timing and the second timing may be longer than the chattering time of the first relay RL1 and the second relay RL2. The chattering time may be experimentally measured or may be set at the design stage of the control device.

[0038] The target potential difference setting unit 17 sets the target potential difference based on the output voltage of the battery BT. For example, the target potential difference setting unit 17 may set the target potential difference using the upstream measurement value acquired by the upstream voltage sensor VS1 as the output voltage. The target potential difference setting unit 17 may also set the upstream measurement value itself as the target potential difference.

[0039] Furthermore, the target potential difference setting unit 17 may set the target potential difference using the value obtained by multiplying the peak current by the internal resistance of the battery BT as the output voltage. The value obtained by multiplying the peak current by the internal resistance of the battery BT may be calculated by the calculation unit 15, which will be described later. The internal resistance of the battery BT may be a preset value, or may be a value determined based on the temperature of the battery BT, the state of charge (SOC) of the battery BT, etc.

[0040] Furthermore, the target potential difference setting unit 17 may calculate a voltage error by subtracting the downstream measurement value from the output voltage after starting the supply of power.The target potential difference setting unit 17 may set the potential difference obtained by adding the voltage error to the output voltage as the target potential difference to be used before starting the next supply of power.

[0041] Furthermore, the target potential difference setting unit 17 may calculate a voltage error by subtracting the downstream measurement value before the start of power supply from the downstream measurement value after the start of power supply. The target potential difference setting unit 17 may set a potential difference obtained by adding the voltage error to the output voltage as a target potential difference to be used before the start of the next power supply.

[0042] The set target potential difference is stored in a permanent memory or the like and is used before the next power supply is started.

[0043] The calculation unit 15 may calculate an integrated value of the peak current, or may calculate a value obtained by multiplying the peak current by the internal resistance of the battery BT.

[0044] Alternatively, the calculation unit 15 may calculate the voltage error by subtracting the downstream measurement value from the output voltage. The calculation unit 15 may calculate the voltage error by subtracting the downstream measurement value before the start of power supply from the downstream measurement value after the start of power supply. The calculation unit 15 may calculate the potential difference by adding the voltage error to the output voltage.

[0045] [Processing Procedure of the Control Device] Fig. 3 is a flowchart showing processing of the control device according to an embodiment of the present disclosure. The processing shown in Fig. 3 may be repeatedly executed at a predetermined cycle. For example, it may be executed when the ignition key of the vehicle is turned on.

[0046] In step S101, the controller 10 acquires a supply start command.

[0047] In step S103, the controller 10 acquires the target potential difference stored in a permanent memory, etc. The target potential difference is transmitted to the charging device 30.

[0048] In step S105, the charging device 30 charges the high voltage component SD based on the target potential difference.

[0049] In step S107, the controller 10 obtains the order stored in a permanent memory or the like.

[0050] In step S109, the controller 10 determines whether or not to turn on the first relay RL1 first, based on the acquired order.

[0051] If it is determined that the first relay RL1 is to be turned on first (YES in step S109), the first relay RL1 is turned on in step S111, and the second relay RL2 is turned on in step S113.

[0052] On the other hand, if it is not determined that the first relay RL1 should be turned on first (NO in step S109), the second relay RL2 is turned on in step S115, and the first relay RL1 is turned on in step S117.

[0053] In step S119, the controller 10 acquires the peak current via the current sensor AS.

[0054] In step S121, the timing setting unit 13 sets an order based on the peak current and the like, and stores the set order.

[0055] In step S123, the target potential difference setting unit 17 sets a target potential difference based on the peak current and the like, and stores the set target potential difference.

[0056] The set "sequence" and "target potential difference" are used before the next power supply is started. As a result, the controller 10 controls the sequence of the first timing at which the first relay RL1 is turned on and the second timing at which the second relay RL2 is turned on each time power supply is started. In addition, the controller 10 sets the target potential difference for charging by the charging device 30 each time power supply is started.

[0057] As described above in detail, the control method and control device according to the present disclosure control a first relay and a second relay provided on a current path that supplies power from a battery to a high-voltage component. The first relay is provided on the current path between a positive terminal of the battery and a positive terminal of the high-voltage component, and the second relay is provided on the current path between a negative terminal of the battery and a negative terminal of the high-voltage component. The controller controls the order of the first timing for turning on the first relay and the second timing for turning on the second relay each time power supply starts.

[0058] This makes it possible to suppress damage caused by inrush current in the relay provided between the battery and the high-voltage component. In particular, it is possible to suppress damage caused by inrush current from concentrating on one of the first relay and the second relay. As a result, it is possible to reduce the failure rate of the first relay and the second relay and achieve a longer life. It is also possible to reduce the failure rate of the entire system that supplies power from the battery to the high-voltage component and achieve a longer life. Furthermore, it is also possible to reduce maintenance costs.

[0059] In the control method and control device according to the present disclosure, the controller may be connected to a current sensor that measures the current flowing through the current path, acquire a peak current of the current via the current sensor each time power supply is started, and change the order based on the peak current. This can prevent damage caused by inrush current from concentrating on one of the first relay and the second relay. Furthermore, it can encourage damage caused by inrush current to be distributed across the first relay and the second relay. As a result, the failure rate of the first relay and the second relay can be reduced, and their lifespans can be extended.

[0060] In the control method and control device according to the present disclosure, the controller may change the order when an increase in the integrated value of the peak current since the last time the order was changed exceeds a predetermined increase amount. This makes it possible to prevent damage caused by the inrush current from concentrating on one of the first relay and the second relay. In particular, it is possible to more evenly distribute damage caused by the inrush current to both relays.

[0061] In the control method and control device according to the present disclosure, the controller may change the order when the peak current is equal to or greater than a predetermined current threshold. This makes it possible to prevent damage caused by an inrush current from concentrating on one of the first and second relays. It is also possible to prevent excessive peak currents that could lead to relay failure from occurring in one of the relays consecutively.

[0062] In the control method and control device according to the present disclosure, the controller may change the order when a difference between an upstream potential difference and a downstream potential difference before the start of power supply is equal to or greater than a predetermined voltage threshold. Here, the upstream potential difference is a potential difference between a positive terminal of the battery and a negative terminal of the battery, and the downstream potential difference is a potential difference between a positive terminal of the high-voltage component and a negative terminal of the high-voltage component. This makes it possible to prevent damage caused by an inrush current from concentrating on one of the first relay and the second relay.

[0063] In the control method and control device according to the present disclosure, the controller may change the order each time power supply is started. This makes it possible to suppress damage caused by inrush current without measuring peak current. Therefore, it is possible to reduce the number of parts required to suppress damage caused by inrush current from concentrating on one of the first and second relays.

[0064] In the control method and control device according to the present disclosure, the time difference between the first timing and the second timing may be longer than the chattering time of the first relay and the second relay. This makes it possible to reliably prevent damage caused by an inrush current from occurring in the relay that is turned on first of the first and second relays. By controlling the order in which the first and second relays are turned on, damage caused by the inrush current can be reliably distributed.

[0065] In the control method and control device according to the present disclosure, a charging device may be provided on the current path, receiving auxiliary power from an auxiliary power source other than the battery. The controller may set a target potential difference based on the output voltage of the battery, and the charging device may charge the high-voltage component with auxiliary power based on the target potential difference. This allows the battery to start supplying power to the high-voltage component when the target potential difference is applied to the high-voltage component, thereby reducing inrush current in a relay provided between the battery and the high-voltage component. Furthermore, a sudden change in voltage of the high-voltage component before and after the battery starts supplying power to the high-voltage component can be suppressed. As a result, damage caused by inrush current can be suppressed.

[0066] In the control method and control device according to the present disclosure, the controller may be connected to an upstream voltage sensor that measures an upstream potential difference between the positive terminal and the negative terminal of the battery and outputs an upstream measurement value. The controller may set a target potential difference using the upstream measurement value as an output voltage. This makes it possible to suppress a sudden change in the voltage of the high-voltage component before and after the battery starts supplying power to the high-voltage component.

[0067] In the control method and control device according to the present disclosure, the controller may be connected to a current sensor that measures the current flowing through the current path and acquire the peak current of the current via the current sensor each time power supply is started. The controller may set the target potential difference using a value obtained by multiplying the peak current by the internal resistance of the battery as the output voltage. This makes it possible to suppress damage caused by inrush current. Furthermore, a voltage sensor for measuring an upstream measurement value or a downstream measurement value is not required to set the target potential difference. As a result, it is possible to suppress damage caused by inrush current while reducing the number of components in the entire system.

[0068] In the control method and control device according to the present disclosure, the controller may be connected to a downstream voltage sensor that measures a downstream potential difference between the positive terminal of the high-voltage component and the negative terminal of the high-voltage component and outputs a downstream measurement value. After starting power supply, the controller may subtract the downstream measurement value from the output voltage to calculate a voltage error, and set the potential difference obtained by adding the voltage error to the output voltage as a target potential difference to be used before starting the next power supply. The downstream measurement value is a measurement of the downstream potential difference and may contain an error. However, by correcting the voltage error, the high-voltage component can be charged using a target potential difference that takes the error into account. As a result, a sudden change in the voltage of the high-voltage component before and after starting power supply from the battery to the high-voltage component can be suppressed. Furthermore, there is no need to increase the accuracy of the downstream voltage sensor, thereby reducing costs.

[0069] In the control method and control device according to the present disclosure, the controller may be connected to a downstream voltage sensor that measures a downstream potential difference between the positive terminal of the high-voltage component and the negative terminal of the high-voltage component and outputs a downstream measurement value. The controller may calculate a voltage error by subtracting a downstream measurement value before the start of power supply from a downstream measurement value after the start of power supply, and set the potential difference obtained by adding the voltage error to the output voltage as a target potential difference to be used before the start of the next power supply. By correcting the voltage error, the high-voltage component can be charged using a target potential difference that takes the error into account. As a result, a sudden change in the voltage of the high-voltage component before and after the start of power supply from the battery to the high-voltage component can be suppressed. Furthermore, there is no need to increase the accuracy of the downstream voltage sensor, thereby reducing costs.

[0070] In the control method and control device according to the present disclosure, the controller may charge the high-voltage component via the charging device until the downstream measurement value reaches a target potential difference before starting the power supply. This can prevent a sudden change in the voltage of the high-voltage component before and after starting the power supply from the battery to the high-voltage component. Also, damage caused by inrush current can be prevented in a relay provided between the battery and the high-voltage component.

[0071] In the control method and control device according to the present disclosure, the battery, high-voltage components, and controller may be mounted on a vehicle. This can suppress damage caused by inrush current in a system mounted on the vehicle. As a result, the failure rate of the entire system can be reduced, and a longer life can be achieved. Furthermore, maintenance costs can be reduced.

[0072] Each of the functions described in the above embodiments may be implemented by one or more processing circuits, including programmed processors, electrical circuits, and even devices such as application specific integrated circuits (ASICs), or circuit components arranged to perform the described functions.

[0073] Although the contents of the present disclosure have been described above based on the embodiments, the present disclosure is not limited to these descriptions, and various modifications and improvements are possible, which will be apparent to those skilled in the art. The descriptions and drawings that form part of this disclosure should not be understood as limiting the present disclosure. Various alternative embodiments, examples, and operating techniques will be apparent to those skilled in the art from this disclosure.

[0074] Of course, the present disclosure includes various embodiments not described herein. Therefore, the technical scope of the present disclosure is defined only by the invention-specifying matters according to the scope of the claims that are appropriate from the above description.

[0075] 10 Controller 11 Input / Output Unit 13 Timing Setting Unit 15 Calculation Unit 17 Target Potential Difference Setting Unit 30 Charging Device AS Current Sensor BT Battery RL1 First Relay RL2 Second Relay SBT Auxiliary Power Supply SD High-Voltage Component TB1 Positive Terminal of Battery TB2 Negative Terminal of Battery TS1 Positive Terminal of High-Voltage Component TS2 Negative Terminal of High-Voltage Component VS1 Upstream Voltage Sensor VS2 Downstream Voltage Sensor

Claims

1. A control method for a controller that controls a first relay and a second relay that are provided on a current path that supplies power from a battery to a high-voltage component, wherein the first relay is provided on the current path between the positive terminal of the battery and the positive terminal of the high-voltage component, and the second relay is provided on the current path between the negative terminal of the battery and the negative terminal of the high-voltage component, and the controller controls the order of a first timing for turning on the first relay and a second timing for turning on the second relay each time the supply of power starts.

2. The control method according to claim 1, wherein the controller is connected to a current sensor that measures the current flowing through the current path, obtains a peak current of the current via the current sensor each time the supply of power starts, and changes the order based on the peak current.

3. The control method according to claim 2, wherein the controller changes the order when an increase in the integrated value of the peak current since the last time the order was changed exceeds a predetermined increase amount.

4. The control method according to claim 2 or 3, wherein the controller changes the order when the peak current is equal to or greater than a predetermined current threshold.

5. A control method according to any one of claims 1 to 4, wherein the controller changes the order when, with respect to an upstream potential difference between the positive terminal of the battery and the negative terminal of the battery, and a downstream potential difference between the positive terminal of the high-voltage component and the negative terminal of the high-voltage component, the difference between the upstream potential difference and the downstream potential difference is equal to or greater than a predetermined voltage threshold before the supply of power is started.

6. The control method according to any one of claims 1 to 5, wherein the controller changes the order each time the supply of power starts.

7. A control method according to any one of claims 1 to 6, wherein the time difference between the first timing and the second timing is longer than a chattering time of the first relay and the second relay.

8. A control method according to any one of claims 1 to 7, wherein a charging device is provided on the current path to receive auxiliary power from an auxiliary power source different from the battery, the controller sets a target potential difference based on the output voltage of the battery, and the charging device charges the high-voltage component with the auxiliary power based on the target potential difference.

9. The control method according to claim 8, wherein the controller is connected to an upstream voltage sensor that measures an upstream potential difference between the positive terminal of the battery and the negative terminal of the battery and outputs an upstream measurement value, and the target potential difference is set using the upstream measurement value as the output voltage.

10. The control method according to claim 8, wherein the controller is connected to a current sensor that measures the current flowing through the current path, acquires a peak current of the current via the current sensor each time the supply of power starts, and sets the target potential difference as the output voltage using a value obtained by multiplying the peak current by the internal resistance of the battery.

11. A control method according to any one of claims 8 to 10, wherein the controller is connected to a downstream voltage sensor that measures a downstream potential difference between the positive terminal of the high-voltage component and the negative terminal of the high-voltage component and outputs a downstream measurement value, and after the supply of power starts, calculates a voltage error by subtracting the downstream measurement value from the output voltage, and sets the potential difference obtained by adding the voltage error to the output voltage as the target potential difference to be used before the next supply of power starts.

12. A control method according to any one of claims 8 to 10, wherein the controller is connected to a downstream voltage sensor that measures a downstream potential difference between the positive terminal of the high-voltage component and the negative terminal of the high-voltage component and outputs a downstream measurement value, calculates a voltage error by subtracting the downstream measurement value before the start of the power supply from the downstream measurement value after the start of the power supply, and sets the potential difference obtained by adding the voltage error to the output voltage as the target potential difference to be used before the start of the next power supply.

13. The control method according to claim 11 or 12, wherein the controller charges the high-voltage component via the charging device until the downstream measurement value reaches the target potential difference before starting the supply of power.

14. The control method according to any one of claims 1 to 13, wherein the battery, the high-voltage component, and the controller are mounted on a vehicle.

15. A control device comprising a controller that controls a first relay and a second relay that are provided on a current path that supplies power from a battery to a high-voltage component, wherein the first relay is provided on the current path between the positive terminal of the battery and the positive terminal of the high-voltage component, and the second relay is provided on the current path between the negative terminal of the battery and the negative terminal of the high-voltage component, and the controller controls the order of a first timing for turning on the first relay and a second timing for turning on the second relay each time the supply of power starts.

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