Control device and control method

Abstract

The present invention relates to a control device and a control method capable of appropriately switching a target temperature range of a storage battery according to a scene, thereby suppressing deterioration of the storage battery. A control device is a control device for a vehicle provided with a rotating electric machine for driving the vehicle, an electricity storage device for transmitting and receiving electricity to and from the rotating electric machine, a temperature adjustment device for adjusting the temperature of the electricity storage device, and a navigation device, the control device being provided with: an acquisition unit for acquiring information indicating the operating state of the vehicle and the temperature of the electricity storage device; a target temperature range determination unit that determines a target temperature range of the power storage device corresponding to the operating state; and a power storage device control unit that controls the operation of the power storage device on the basis of the temperature of the power storage device and the target temperature range, the operation states including a first travel state in which the vehicle travels without cooperating with the navigation device and a second travel state in which the vehicle travels in cooperation with the navigation device. The target temperature range corresponding to the second traveling state is narrower than the target temperature range corresponding to the first traveling state.

Description

Technical Field

[0001] The present invention relates to a control device and a control method. Background Art

[0002] In recent years, research and development of secondary batteries, which contribute to energy efficiency, has been underway to ensure that more people have access to reliable, sustainable, and advanced energy suitable for them. For example, managing battery temperature is a known measure for suppressing the degradation of batteries installed in electric vehicles. For example, a method is known in which a user selects a preferred charging / operation mode from a plurality of pre-set modes, thereby maintaining the battery temperature within a temperature range corresponding to the selected mode (see Japanese Patent No. 5055347). Summary of the Invention

[0003] Problems to be solved by the invention

[0004] However, in order to maintain the battery at a target temperature, a lower limit and an upper limit of the battery temperature are pre-set, and the battery temperature is adjusted to maintain the battery temperature between the lower and upper limits. However, if the lower and upper limit of the battery temperature are uniformly set to the same value regardless of the situation, the target battery temperature may not be maintained, resulting in battery degradation and durability problems.

[0005] The present invention was made in consideration of such circumstances, and one of its objectives is to provide a control device and control method that can appropriately switch the target temperature range of a battery according to the scenario, thereby suppressing battery degradation and further contributing to energy efficiency.

[0006] Solutions to Problems

[0007] The control device and control method according to the present invention employ the following configurations.

[0008] (1) A control device according to one embodiment of the present invention is a control device for a vehicle, the vehicle including a rotating electric machine for driving the vehicle, a power storage device for transferring electric power to and from the rotating electric machine, a temperature adjustment device for adjusting the temperature of the power storage device, and a navigation device, wherein the control device includes: an acquisition unit for acquiring information indicating an operating state of the vehicle and the temperature of the power storage device; a target temperature range determination unit for determining a target temperature range for the power storage device corresponding to the operating state; and a power storage device control unit for controlling the operation of the power storage device based on the temperature of the power storage device and the target temperature range, the operating state including a first driving state in which the vehicle travels without cooperating with the navigation device and a second driving state in which the vehicle travels with cooperating with the navigation device, the target temperature range corresponding to the second driving state being narrower than the target temperature range corresponding to the first driving state.

[0009] According to the aspect (2), in the control device according to the aspect (1), the second driving state is a state in which the vehicle is automatically driven in cooperation with the navigation device.

[0010] The solution (3) is based on the control device involved in the solution (2) above, and the control device further includes an automatic driving control unit for controlling the automatic driving of the vehicle, and the automatic driving control unit switches the operation state of the vehicle from the second driving state to the first driving state when the operation state of the vehicle is the second driving state and it is estimated that the temperature of the power storage device is out of the target temperature range corresponding to the second driving state.

[0011] According to a fourth aspect, in the control device according to the first aspect, the operating state further includes a charging state in which the power storage device is charged.

[0012] According to the embodiment (5), in the control device according to the embodiment (4), the target temperature range corresponding to the second driving state is the same as the target temperature range corresponding to the DC charging state in the charging state.

[0013] According to the embodiment (6), in the control device according to the embodiment (4), the target temperature range corresponding to the first driving state is the same as the target temperature range corresponding to the AC charging state in the charging state.

[0014] According to the embodiment (7), based on the control device of the embodiment (4), the target temperature range corresponding to the state of DC charging in the charging state is narrower than the target temperature range corresponding to the state of AC charging in the charging state.

[0015] According to the embodiment (8), in addition to the control device according to any one of the embodiments (1) to (7), the control device further includes a temperature adjustment device control unit that controls the temperature adjustment device so that the temperature of the power storage device falls within the target temperature range.

[0016] The scheme (9) is based on the control device involved in the scheme (8) above, and the acquisition unit also obtains server information related to the destination of the vehicle or the area where the vehicle is scheduled to travel from an external server, and the temperature adjustment device control unit controls the temperature adjustment device based on the obtained server information.

[0017] The scheme (10) is based on the control device involved in the scheme (3) above. When the operating state of the vehicle is the second driving state and the destination of the vehicle is a power supply facility, and pre-cooling control of the power storage device is performed by the control of the temperature adjustment device, the automatic driving control unit maintains the operating state of the vehicle in the second driving state even when the temperature of the power storage device deviates from the target temperature range corresponding to the second driving state as a result of the pre-cooling control.

[0018] (11) Another embodiment of the present invention is a control method for a vehicle, wherein the vehicle includes a rotating motor for driving the vehicle, a power storage device for transferring electric power to and from the rotating motor, a temperature adjustment device for adjusting the temperature of the power storage device, and a navigation device, wherein the control method causes a computer to perform the following processing: obtaining information indicating an operating state of the vehicle and the temperature of the power storage device; determining a target temperature range of the power storage device corresponding to the operating state; and controlling the operation of the power storage device based on the temperature of the power storage device and the target temperature range, the operating state including a first driving state in which the vehicle is driven without cooperating with the navigation device and a second driving state in which the vehicle is driven in an automatic driving manner in cooperation with the navigation device, the target temperature range corresponding to the second driving state being narrower than the target temperature range corresponding to the first driving state.

[0019] The scheme (12) is based on the control method involved in the above-mentioned scheme (11), and when the operating state of the vehicle is the second driving state and it is estimated that the temperature of the storage device is out of the target temperature range corresponding to the second driving state, the operating state of the vehicle is switched from the second driving state to the first driving state.

[0020] Effects of the Invention

[0021] According to the above aspects (1) to (12), the target temperature range of the battery can be appropriately switched according to the scene, thereby suppressing degradation of the battery. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is a diagram showing an example of the structure of a vehicle M according to the embodiment.

[0023] Figure 2 It is a functional block diagram showing an example of the control unit 40 according to the embodiment.

[0024] Figure 3 This is a flowchart showing an example of the flow of the temperature management process of the battery 52 executed by the control unit 40 according to the embodiment.

[0025] Figure 4 1 is a diagram showing an example of target temperature range information TD according to the embodiment.

[0026] Figure 5 It is a diagram for explaining the contents of control by the battery control unit 43 according to the embodiment. DETAILED DESCRIPTION

[0027] Hereinafter, embodiments of the control device and control method of the present invention will be described with reference to the accompanying drawings. The control device of the embodiment controls the overall operation of an electric vehicle (hereinafter referred to as "vehicle M"). Vehicle M is, for example, a two-wheeled, three-wheeled, or four-wheeled vehicle, and its driving source is a rotating electric machine (motor). The rotating electric machine operates using the generated power generated by a generator connected to an internal combustion engine, or the discharged power of a battery. Hereinafter, vehicle M is, for example, an electric vehicle such as a BEV (Battery Electric Vehicle) that travels by an electric motor driven by power supplied from an on-board battery.

[0028] [Vehicle M]

[0029] Figure 1 1 is a diagram showing an example of the structure of a vehicle M according to an embodiment. The vehicle M includes, for example, a motor 10, drive wheels 12, a brake device 14, a vehicle sensor 20, a PCU (Power Control Unit) 30, a control unit 40, a power supply device 50, an air conditioning device 60, a navigation device 70, and a storage device 80. The power supply device 50 includes, for example, a battery 52, a battery sensor 54, and a temperature adjustment device 56. The vehicle M is an example of a "vehicle." The motor 10 is an example of a "rotating electric machine" used to drive the vehicle. The battery 52 is an example of an "electrical storage device" that exchanges electric power with the rotating electric machine. The temperature adjustment device 56 is an example of a "temperature adjustment device" that adjusts the temperature of the electric storage device. The navigation device 70 is an example of a "navigation device."

[0030] The motor 10 is, for example, a three-phase AC motor. The rotor of the motor 10 is connected to the drive wheels 12. The motor 10 uses the power supplied from the battery 52 to output power to the drive wheels 12. In addition, the motor 10 generates power using the kinetic energy of the vehicle when the vehicle decelerates.

[0031] Braking device 14 includes, for example, a brake caliper, a hydraulic cylinder that transmits hydraulic pressure to the caliper, and an electric motor that generates hydraulic pressure in the hydraulic cylinder. Braking device 14 may also include a mechanism that transmits hydraulic pressure generated by operation of the brake pedal to the hydraulic cylinder via a master cylinder as a backup. Braking device 14 is not limited to the configuration described above; it may also be an electronically controlled hydraulic braking device that transmits hydraulic pressure from the master cylinder to the hydraulic cylinder.

[0032] The vehicle sensor 20 includes an accelerator opening sensor, a vehicle speed sensor, and a brake pedaling amount sensor. The accelerator opening sensor is mounted on an accelerator pedal that receives an acceleration instruction from the driver. The accelerator opening sensor detects the amount of operation of the accelerator pedal, and outputs the detected amount of operation as the accelerator opening to the control unit 40. The vehicle speed sensor includes, for example, a wheel speed sensor mounted on each wheel and a speed computer. The vehicle speed sensor derives the speed of the vehicle (vehicle speed) by integrating the wheel speed detected by the wheel speed sensor, and outputs the derived speed information to the control unit 40. The brake pedaling amount sensor is mounted on the brake pedal. The brake pedaling amount sensor detects the amount of operation of the brake pedal, and outputs the detected amount of operation as the brake pedaling amount to the control unit 40.

[0033] The PCU 30 includes, for example, an inverter 32 and a VCU (Voltage Control Unit) 34. The inverter 32 is connected between the battery 52 and the motor 10. The inverter 32 converts the power output by the VCU 34 into power corresponding to the motor 10 and supplies it to the motor 10. The inverter 32 is, for example, an AC-DC converter. The DC side terminals of the inverter 32 are connected to a DC line DL. The DC line DL is connected to the battery 52 via the VCU 34. The inverter 32 converts the AC power generated by the motor 10 into DC power and outputs it to the DC line DL.

[0034] The VCU 34 is connected between the battery 52 and the motor 10. The VCU 34 steps up or steps down the voltage of the electric power supplied from the battery 52 and outputs the result to the DC line DL. The VCU 34 is, for example, a DC-DC converter.

[0035] The control unit 40 controls the overall operation of the vehicle M. For example, the control unit 40 controls the motor 10 and the brake device 14 based on information output by the vehicle sensors 20. Furthermore, the control unit 40 controls the VCU 34 to adjust the power supplied to the motor 10 based on information output by the vehicle sensors 20. Furthermore, the control unit 40 determines a target temperature range for the battery 52 and controls the temperature adjustment device 56 based on the determined target temperature range. Furthermore, the control unit 40 cooperates with the navigation device 70 to control the autonomous driving of the vehicle M.

[0036] Each of the functional parts of the control unit 40 is implemented, for example, by executing a program (software) on a computer processor such as an ECU (Electronic Control Unit) or a CPU (Central Processing Unit). Each of the functional parts of the control unit 40 can also be implemented by hardware (circuit parts) such as an LSI (Large Scale Integration), an ASIC (Application Specific Integrated Circuit), an FPGA (Field-Programmable Gate Array), or a GPU (Graphics Processing Unit), or can be implemented through the coordination of software and hardware. Each of the functions of the control unit 40 can also be assembled into a separate control device, such as a motor ECU, a brake ECU, or a battery / VCU ECU. Details on the functions of the control unit 40 will be described later.

[0037] The battery 52 supplies power to various components mounted on the vehicle M. The battery 52 is, for example, a battery package having a power storage unit (not shown) that stores power used to drive the vehicle M. The battery 52 may be, for example, a box-type battery package that can be easily loaded and unloaded relative to the vehicle M, or a fixed-mounted structure that is not easily loaded and unloaded relative to the vehicle M. The power storage unit (not shown) of the battery 52 is, for example, a secondary battery that can be charged and discharged, such as a lithium-ion battery. As the secondary battery of the battery 52, for example, in addition to lead batteries, nickel-metal hydride batteries, sodium-ion batteries, etc., capacitors such as double-layer capacitors, or composite batteries obtained by combining secondary batteries and capacitors are also conceivable. The battery 52 can be charged by power provided by a charger outside the vehicle M, that is, an external power supply 100. The battery 52 may also be an FCS (Fuel Cell Stack).

[0038] The battery sensor 54 measures physical quantities such as the current, voltage, and temperature of the battery 52. ​​The battery sensor 54 includes, for example, a current sensor, a voltage sensor, and a temperature sensor. For example, the battery sensor 54 measures the temperature of the battery 52 under the control of the control unit 40 and outputs information indicating the measured temperature to the control unit 40. Furthermore, the battery sensor 54 measures the current and voltage of the battery 52 and outputs information indicating the measured current and voltage to the control unit 40.

[0039] Temperature adjustment device 56 adjusts the temperature of battery 52, for example, based on control by control unit 40. Temperature adjustment device 56 is, for example, a heat exchanger (cooler) that exchanges heat between a heat medium and an air conditioning heat medium. Examples of the heat medium include water, radiator fluid, and coolant. Furthermore, examples of the air conditioning heat medium include Freon and a Freon substitute.

[0040] The air conditioning device 60 adjusts the temperature in the interior of the vehicle M under the control of the control unit 40 , for example, based on instructions input by an occupant of the vehicle M via an input interface (not shown).

[0041] The navigation device 70 includes, for example, an HMI (Human Machine Interface) 72, a GNSS (Global Navigation Satellite System) receiver 74, and a navigation control device 76. The HMI 72 includes, for example, a touch panel display device, a speaker, a microphone, etc. The GNSS receiver 74 detects the position of the vehicle (the position of the vehicle M) based on radio waves received from a GNSS satellite (e.g., a GPS satellite). The navigation control device 76 includes, for example, a CPU (Central Processing Unit) and various storage devices, and controls the entire navigation device 70. Map information (navigation map) is stored in the storage device. The navigation map is a map that represents roads using nodes and links. The navigation control device 76 refers to the navigation map to determine a route from the position of the vehicle M detected by the GNSS receiver 74 to the destination specified using the HMI 72. In addition, the navigation control device 76 can also use a communication device (not shown) to send the position and destination of the vehicle M to the navigation server 200 and obtain the route sent back from the navigation server 200. The navigation control device 76 outputs the route information of the route determined by any of the above methods to the control unit 40.

[0042] The storage device 80 stores various information necessary for controlling the vehicle M. For example, the storage device 80 stores target temperature range information TD of the battery 52. ​​The storage device 80 is implemented using an EEPROM (Electrically Erasable Programmable Read Only Memory), a ROM (Read Only Memory), or a RAM (Random Access Memory). At least a portion of the information contained in the storage device 80 may be stored in an external device capable of communicating with the vehicle M.

[0043] The external power supply 100 supplies power to the battery 52 of the vehicle M. The external power supply 100 includes, for example, a charging cable 104 and a charging gun 102 connected to the charging cable 104. The charging gun 102 is connected to a charging port (not shown) provided on the main body of the vehicle M by a passenger of the vehicle M. The external power supply 100 supplies power to the battery 52 of the vehicle M via the charging cable 104 and the charging gun 102 to charge the battery 52. ​​Alternatively, the charging cable may be provided on the main body so as to be led out to the outside of the vehicle M. A first end of the two ends of the charging cable is fixed to the vehicle M, and a charging plug is provided at a second end of the two ends of the charging cable 104. The charging plug is connected to, for example, a socket of the external power supply 100, which is a household jack (consent) (plug-in connector for wiring) or the like.

[0044] The navigation server 200 transmits route information corresponding to a request from the vehicle M to the vehicle M via the communication network NW. The navigation server 200 also transmits information such as the distance from the vehicle M to a destination (e.g., a charging facility), the weather forecast (temperature) of the area through which the vehicle M passes, and road surface information to the vehicle M.

[0045] [Configuration of the Control Unit 40]

[0046] Figure 2 1 is a functional block diagram showing an example of the control unit 40 according to the embodiment. The control unit 40 includes, for example, an acquisition unit 41 , a target temperature range determination unit 42 , a battery control unit 43 , a temperature adjustment device control unit 44 , and an automatic driving control unit 45 .

[0047] The acquisition unit 41 acquires various information related to the vehicle M. For example, the acquisition unit 41 acquires information on the temperature of the battery 52 measured by the battery sensor 54. Furthermore, the acquisition unit 41 acquires information indicating the operating state of the vehicle M, such as whether the vehicle M is traveling, whether the vehicle M is traveling in cooperation with the navigation device 70, the speed of the vehicle M, the outside temperature of the vehicle M, and whether the vehicle M is charging (information indicating the charging status of the charging gun 102 connected to the vehicle M). Furthermore, the acquisition unit 41 acquires information such as the vehicle M's destination (e.g., a new charging facility), the route to the destination, the distance to the destination, the weather forecast (temperature) for the area the vehicle M is passing through, and road surface information from the navigation server 200. The acquisition unit 41 is an example of an "acquisition unit." The operating state includes a first driving state in which the vehicle M is traveling without cooperation with the navigation device 70, and a second driving state in which the vehicle M is traveling in cooperation with the navigation device 70. The second driving state is a state in which the vehicle M is automatically driven in cooperation with the navigation device. Alternatively, the second driving state may be a state in which route guidance is displayed on a display device (not shown) provided in the vehicle M in cooperation with a navigation device.

[0048] The target temperature range determination unit 42 determines a target temperature range for the battery 52 corresponding to the acquired operational information regarding the operation of the vehicle M and the target temperature range information TD stored in the storage device 80. The target temperature range determination unit 42 is an example of a "target temperature range determination unit." The target temperature range corresponding to the second driving state in which the vehicle M is operated in cooperation with the navigation device 70 is narrower than the target temperature range corresponding to the first driving state in which the vehicle M is operated without cooperation with the navigation device 70. Details of the processing performed by the target temperature range determination unit 42 will be described later.

[0049] The battery control unit 43 controls the operation of the battery 52 based on the temperature of the battery 52 obtained by the acquisition unit 41 and the target temperature range determined by the target temperature range determination unit 42. For example, if the obtained temperature of the battery 52 falls outside the determined target temperature range, the battery control unit 43 controls the output of the battery 52 by reducing or stopping the output. The battery control unit 43 is an example of a "power storage device control unit." Details of the processing performed by the battery control unit 43 will be described later.

[0050] The temperature control unit 44 controls the temperature control unit 56. For example, the temperature control unit 44 controls the temperature control unit 56 so that the acquired temperature of the battery 52 falls within a determined target temperature range. The temperature control unit 44 is an example of a "temperature control unit." Details of the processing performed by the temperature control unit 44 will be described later.

[0051] The automatic driving control unit 45 controls the automatic driving of the vehicle M. For example, the automatic driving control unit 45 cooperates with the navigation device 70 to automatically drive the vehicle M to the destination. The automatic driving control unit 45 is an example of an "automatic driving control unit." When the operating state of the vehicle M is in the second driving state and the temperature of the battery 52 is estimated to be outside the target temperature range corresponding to the second driving state, the automatic driving control unit 45 switches the operating state of the vehicle M from the second driving state to the first driving state. Details of the processing performed by the automatic driving control unit 45 will be described later.

[0052] [Processing Flow]

[0053] Next, an example of the temperature management process of the battery 52 , mainly focusing on the operation of the control unit 40 , will be described. Figure 3 This is a flowchart showing an example of the flow of the temperature management process of the battery 52 executed by the control unit 40 according to the embodiment.

[0054] First, the acquisition unit 41 acquires information indicating the operating state of the vehicle M (step S101). The information indicating the operating state of the vehicle M includes, for example, information indicating whether the vehicle M is traveling, information indicating whether the vehicle M is traveling in cooperation with the navigation device 70, and information indicating whether the vehicle M is being charged.

[0055] Next, the target temperature range determination unit 42 determines the target temperature range of the battery 52 based on the acquired information indicating the operating state of the vehicle M and the target temperature range information TD stored in the storage device 80 (step S103 ). Figure 4 TD is a diagram showing an example of target temperature range information TD according to the embodiment. For example, when the information obtained indicating the operating state of the vehicle M indicates a state of traveling without cooperating with the navigation device 70, the target temperature range determination unit 42 sets Figure 4 The target temperature range is determined as the range of 10 to 35°C, which is the range of the lower limit temperature "10°C" and the upper limit temperature "35°C" associated with "No. 1: Driving (no navigation cooperation)". For example, if the information indicating the operating state of the vehicle M obtained indicates that the vehicle is traveling in cooperation with the navigation device 70, the target temperature range determination unit 42 sets Figure 4 The target temperature range is determined to be 15°C to 25°C, which is the lower limit temperature range associated with "No. 2: Driving (with navigation cooperation)" and the upper limit temperature range associated with "No. 2: Driving (with navigation cooperation)." Thus, the target temperature range corresponding to "No. 2: Driving (with navigation cooperation)" is determined to be narrower than the target temperature range corresponding to "No. 1: Driving (without navigation cooperation)."

[0056] For example, when the acquired information indicating the operating state of the vehicle M indicates that the vehicle is being charged at an AC voltage (low-speed charging), the target temperature range determination unit 42 sets the target temperature range to Figure 4 The target temperature range is determined to be 5°C to 35°C, which is the lower limit temperature associated with "No. 3: Charging (AC Charging)". This target temperature range for "No. 3: Charging (AC Charging)" can be the same as the target temperature range for "No. 1: Driving (No Navigation Cooperation)".

[0057] For example, when the acquired information indicating the operating state of the vehicle M indicates that the vehicle is being DC charged (fast charged), the target temperature range determination unit 42 sets the target temperature range to Figure 4 The target temperature range is determined to be 15°C to 25°C, with a lower limit temperature of 15°C and an upper limit temperature of 25°C, associated with "No. 4: Charging (DC Charging)." This target temperature range for "No. 4: Charging (DC Charging)" can be the same as the target temperature range for "No. 2: Driving (with navigation cooperation)." The target temperature range for DC charging is narrower than the target temperature range for AC charging.

[0058] Next, the acquisition unit 41 acquires the temperature of the battery 52 measured by the battery sensor 54 (step S105). Next, the battery control unit 43 determines whether the acquired battery temperature is within the determined target temperature range (step S107).

[0059] If the battery temperature is determined to be within the determined target temperature range (step S107: Yes), the battery control unit 43 performs normal control without limiting the output of the battery 52 (step S109). On the other hand, if the battery temperature is determined to be outside the determined target temperature range (step S107: No), the battery control unit 43 performs limiting control to reduce or stop the output of the battery 52 (step S111).

[0060] Figure 5 1 is a diagram illustrating the contents of control performed by the battery control unit 43 according to the embodiment. Figure 5As shown, when the operating state of the vehicle M is "No. 1: Driving (without navigation cooperation)", normal control is performed within the target temperature range (10 to 35°C), and restriction control is performed outside the target temperature range. The restriction control includes a first restriction control when the temperature is lower than the target temperature range (10 to 35°C), and a second restriction control when the temperature is higher than the target temperature range. Under the first restriction control and the second restriction control, the output from the battery 52 is reduced or stopped. Alternatively, under the first restriction control and the second restriction control, the output from the battery 52 may be more significantly restricted as the degree of departure from the target temperature range increases. The content of the restriction in the first restriction control and the content of the restriction in the second restriction control may also be different.

[0061] In addition, if Figure 5 As shown, when the operating state of the vehicle M is "No. 3: Charging (AC charging)", normal control is performed within the target temperature range (5 to 35°C), and limited control is performed outside the target temperature range. Under normal control, the charging of the battery 52 is not limited. Limited control includes a first limited control when the temperature is below the target temperature range (5 to 35°C), and a second limited control when the temperature is above the target temperature range. Under the first limited control and the second limited control, the charging time of the battery 52 is limited. For example, under the first limited control and the second limited control, the charging time of the battery 52 is limited in a manner that becomes longer (in a manner that the charging is performed slowly). Alternatively, under the first limited control and the second limited control, the charging time of the battery 52 may be limited in a manner that becomes longer as the degree of departure from the target temperature range increases. The content of the restriction in the first limited control and the content of the restriction in the second limited control may also be different.

[0062] Furthermore, under the normal control and limited control described above, the temperature control device control unit 44 controls the temperature control device 56 in parallel. For example, if the acquired temperature of the battery 52 is not within a determined target temperature range, the temperature control device control unit 44 controls the temperature control device 56 so that the battery 52 temperature is within the target temperature range. Under the first limited control, when the temperature is below the target temperature range, the temperature control device control unit 44 controls the temperature control device 56 so that the battery 52 temperature is heated. On the other hand, under the second limited control, when the temperature is above the target temperature range, the temperature control device control unit 44 controls the temperature control device 56 so that the battery 52 temperature is cooled. Furthermore, even when the acquired temperature of the battery 52 is within the determined target temperature range, the temperature control device control unit 44 controls the temperature control device 56 so that the battery 52 temperature is less likely to deviate from the target temperature range (for example, so that the battery 52 temperature is closer to the center of the target temperature range).

[0063] Furthermore, under the above-described normal control, when the operating state of the vehicle M is "No. 2: Driving (with navigation cooperation)" and it is estimated that the temperature of the battery 52 is outside the corresponding target temperature range (close to the lower limit or upper limit of the target temperature range), the automatic driving control unit 45 switches the driving state of the vehicle M from "No. 2: Driving (with navigation cooperation)" to "No. 1: Driving (without navigation cooperation)". By performing such control, it is possible to avoid in advance the situation where the temperature of the battery 52 is outside the target temperature range.

[0064] It should be noted that the acquisition unit 41 may also acquire server information related to the destination of the vehicle M or the area where the vehicle M is scheduled to travel from the external navigation server 200, and the temperature control unit 44 may control the temperature control unit 56 based on the acquired server information. For example, when the distance to the charging facility acquired as server information is short, the temperature control unit 44 may control the temperature of the battery 52 to lower it for charging (taking into account the fact that the temperature of the battery 52 rises during charging). Alternatively, for example, when the temperature of the area that the vehicle M will subsequently pass through, acquired as server information, is high (or low), the temperature control unit 44 may control the temperature of the battery 52 to lower (raise) it. By performing such control, it is possible to prevent the temperature of the battery 52 from falling outside the target temperature range.

[0065] Furthermore, the temperature control unit 44 may cause the temperature control unit 56 to perform pre-cooling control to cool the battery 52 based on information about the destination of the vehicle M. For example, when the vehicle M is traveling in cooperation with the navigation device 70 and the destination of the vehicle M is a power supply facility (quick charging point), the temperature control unit 44 may cause the temperature control unit 56 to perform pre-cooling control to cool the battery 52. ​​Here, even if the temperature of the battery 52 falls outside the target temperature range as a result of the pre-cooling control, the automatic driving control unit 45 may maintain the vehicle M in the state of traveling in cooperation with the navigation device 70 when the pre-cooling control is performed.

[0066] After the above series of processing is performed, the process returns to step S101 and the subsequent processing is repeated. For example, if the operating state of the vehicle M obtained in step S101 indicates an operating state different from the previous state, control is performed according to the latest changed operating state.

[0067] As described above, according to the present embodiment, it is possible to suppress degradation of the battery by appropriately controlling the target temperature range of the battery according to the scene (operation state) of vehicle operation.

[0068] While specific embodiments of the present invention have been described above, the present invention is not limited to these embodiments at all, and various modifications and substitutions can be made without departing from the spirit of the present invention.

Claims

1. A control device, which is a control device for a vehicle, the vehicle comprising a rotating electric machine for driving the vehicle, a power storage device for transferring electric power to and from the rotating electric machine, a temperature adjustment device for adjusting the temperature of the power storage device, and a navigation device, wherein: The control device comprises: an acquisition unit that acquires information indicating an operating state of the vehicle and a temperature of the power storage device; a target temperature range determination unit that determines a target temperature range of the power storage device corresponding to the operating state; as well as a power storage device control unit that controls the operation of the power storage device based on the temperature of the power storage device and the target temperature range, The operation state includes a first driving state in which the vehicle is driven without cooperating with the navigation device, and a second driving state in which the vehicle is driven in cooperation with the navigation device. The target temperature range corresponding to the second running state is narrower than the target temperature range corresponding to the first running state.

2. The control device according to claim 1, wherein: The second driving state is a state in which the vehicle is automatically driven in cooperation with the navigation device.

3. The control device according to claim 2, wherein: The control device further includes an automatic driving control unit for controlling automatic driving of the vehicle. The automatic driving control unit switches the operating state of the vehicle from the second driving state to the first driving state when the operating state of the vehicle is the second driving state and it is estimated that the temperature of the power storage device is out of the target temperature range corresponding to the second driving state.

4. The control device according to claim 1, wherein: The operating state also includes a charging state in which the power storage device is charged.

5. The control device according to claim 4, wherein: The target temperature range corresponding to the second driving state is the same as the target temperature range corresponding to the state of being DC charged in the charging state.

6. The control device according to claim 4, wherein: The target temperature range corresponding to the first running state is the same as the target temperature range corresponding to the state of being AC charged in the charging state.

7. The control device according to claim 4, wherein: The target temperature range corresponding to a state in which direct current charging is performed in the charging state is narrower than the target temperature range corresponding to a state in which alternating current charging is performed in the charging state.

8. The control device according to any one of claims 1 to 7, wherein: The control device further includes a temperature adjustment device control unit configured to control the temperature adjustment device so that the temperature of the power storage device falls within the target temperature range.

9. The control device according to claim 8, wherein: The acquisition unit further acquires server information related to the destination of the vehicle or the area where the vehicle is scheduled to travel from an external server. The temperature adjustment device control unit controls the temperature adjustment device based on the acquired server information.

10. The control device according to claim 3, wherein: When the operating state of the vehicle is the second driving state and the destination of the vehicle is a power supply facility, and pre-cooling control of the power storage device is performed by control of the temperature adjustment device, the automatic driving control unit maintains the operating state of the vehicle in the second driving state even if the temperature of the power storage device deviates from the target temperature range corresponding to the second driving state as a result of the pre-cooling control.

11. A control method, which is a control method for a vehicle, the vehicle comprising a rotating electric machine for driving the vehicle, a power storage device for transferring electric power to and from the rotating electric machine, a temperature adjustment device for adjusting the temperature of the power storage device, and a navigation device, wherein: The control method enables the computer to perform the following processing: acquiring information indicating an operating state of the vehicle and a temperature of the power storage device; determining a target temperature range of the power storage device corresponding to the operating state; and controlling the operation of the power storage device based on the temperature of the power storage device and the target temperature range, The operation state includes a first driving state in which the vehicle is driven without cooperating with the navigation device, and a second driving state in which the vehicle is driven in an automatic driving manner in cooperation with the navigation device. The target temperature range corresponding to the second running state is narrower than the target temperature range corresponding to the first running state.

12. The control method according to claim 11, wherein: When the operating state of the vehicle is the second running state and it is estimated that the temperature of the power storage device is out of the target temperature range corresponding to the second running state, the operating state of the vehicle is switched from the second running state to the first running state.

Images