Vehicle battery thermal management control method and device and vehicle

Abstract

This disclosure relates to a vehicle battery thermal management control method, apparatus, and vehicle, including acquiring the battery operating state of the vehicle battery; controlling the operating modes of multiple battery thermal management controllers according to the battery operating state; and controlling the multiple battery thermal management controllers according to their respective operating modes and / or battery operating states to achieve heat dissipation for the vehicle battery. It can refine the operating strategies of each battery thermal management controller through different operating modes based on the battery operating state within the vehicle, thereby truly ensuring that the vehicle battery operates under stable ambient temperatures according to the needs of the vehicle or its battery, thus guaranteeing vehicle driving safety.

Description

Technical Field

[0001] This disclosure relates to the field of vehicle battery thermal management, specifically to a vehicle battery thermal management control method, device, and vehicle. Background Technology

[0002] The thermal management system of a fuel cell in a vehicle has a decisive impact on the efficiency, performance, safety, and lifespan of the fuel cell system. The main function of the thermal management system is to maintain the proton exchange membrane within the fuel cell system within its optimal operating temperature range. Minimizing the temperature difference between the inlet and outlet water of the fuel cell system, controlling the temperature fluctuation range of the inlet and outlet water, and ensuring that the fuel cell can operate under suitable conditions are the key points and challenges of the fuel cell thermal management system. Summary of the Invention

[0003] The purpose of this disclosure is to provide a vehicle battery thermal management control method, device, and vehicle, which can refine the working strategy of each battery thermal management controller through different working modes according to the working state of the battery in the vehicle, so as to truly ensure that the vehicle battery can work under a stable ambient temperature according to the needs of the vehicle or the vehicle battery, thereby ensuring the driving safety of the vehicle.

[0004] To achieve the above objectives, this disclosure provides a vehicle battery thermal management control method, the method comprising:

[0005] Obtain the battery operating status of the vehicle battery;

[0006] The operating modes of multiple battery thermal management controllers are controlled according to the battery's operating state. The multiple battery thermal management controllers include a fan controller, a water pump controller, and a valve controller. The fan controller is used to control the cooling fan in the vehicle. The water pump controller is used to control the battery coolant water pump in the vehicle. The valve controller is used to control the valves in the battery coolant pipeline circuit in the vehicle. The valves are used to control the degree of heat dissipation of the battery coolant.

[0007] The plurality of battery thermal management controllers are controlled according to their respective operating modes and / or the battery operating state to achieve heat dissipation of the vehicle battery.

[0008] Optionally, the battery operating state includes an initialization state;

[0009] The step of controlling the plurality of battery thermal management controllers according to their respective operating modes and / or battery operating states includes: when the battery operating state is the initialization state, controlling the valve according to the conductivity concentration of the battery coolant, controlling the speed of the battery coolant pump to a first speed, and controlling the duty cycle of the cooling fan to a first duty cycle.

[0010] Optionally, controlling the valve based on the conductivity concentration of the battery coolant includes:

[0011] When the conductivity concentration is lower than a preset concentration threshold, the valve opening is controlled to a first opening degree so that the battery coolant does not flow through the radiator in the battery coolant pipeline circuit for heat dissipation.

[0012] When the conductivity concentration is not lower than the concentration threshold, the valve opening is controlled to a second opening, so that a portion of the battery coolant flows through the radiator in the battery coolant pipeline circuit for heat dissipation, while another portion of the battery coolant does not flow through the radiator in the battery coolant pipeline circuit for heat dissipation.

[0013] Optionally, the battery operating state includes a preheating state.

[0014] The method of controlling the operation mode of multiple battery thermal management controllers according to the battery operating state includes: when the battery operating state is the preheating state, controlling the fan controller and water pump controller to be in automatic mode;

[0015] The step of controlling the plurality of battery thermal management controllers according to their respective operating modes and / or battery operating states includes: when the battery operating state is the preheating state, controlling the opening degree of the valve to a first opening degree so that the battery coolant does not flow through the radiator in the battery coolant pipeline circuit for heat dissipation.

[0016] Optionally, the battery operating state includes the vehicle driving state.

[0017] The operating modes of controlling multiple battery thermal management controllers according to the battery operating state include:

[0018] When the battery is in the vehicle driving state, the first speed requirement of the vehicle other than the vehicle battery for the cooling fan and the second speed requirement of the vehicle battery for the cooling fan are obtained.

[0019] When the first speed requirement is less than the second speed requirement, the fan controller and the water pump controller are controlled to be in automatic mode, and the valve controller is determined to be in the first mode;

[0020] When the first speed requirement is not less than the second speed requirement, the fan controller is controlled to be in the first mode, and the water pump controller and the valve controller are both in the automatic mode.

[0021] Optionally, controlling the plurality of battery thermal management controllers according to their respective operating modes and / or battery operating states includes:

[0022] When the battery is in the vehicle driving state and the valve controller is not in the automatic mode, the valve opening is controlled to the third opening so that all the battery coolant flows through the radiator in the battery coolant pipeline circuit for heat dissipation.

[0023] When the battery is in the vehicle driving state and the fan controller is not in the automatic mode, the speed of the cooling fan is controlled according to the first speed requirement.

[0024] Optionally, the battery operating state includes a hot standby state.

[0025] The step of controlling the plurality of battery thermal management controllers according to their respective operating modes and / or battery operating states includes:

[0026] When the battery is in the hot standby state, the valve opening is controlled to the third degree so that all the battery coolant flows through the radiator in the battery coolant pipeline circuit for heat dissipation; and

[0027] When the battery is in the hot standby state, the duty cycle of the cooling fan is controlled to the second duty cycle, and the speed of the battery coolant pump is controlled to the second speed, until the coolant inlet temperature of the vehicle battery is lower than the first preset temperature.

[0028] Optionally, the battery operating state includes normal parking state.

[0029] The method of controlling the operation mode of multiple battery thermal management controllers according to the battery operating state includes: when the battery operating state is the normal parking state, controlling the fan controller to be in automatic mode;

[0030] The step of controlling the plurality of battery thermal management controllers according to their respective operating modes and / or battery operating states includes:

[0031] When the battery is in the normal parking state, the valve opening is controlled to the third degree so that all the battery coolant flows through the radiator in the battery coolant pipeline circuit for heat dissipation; and

[0032] When the battery is in the hot standby state, the speed of the battery coolant pump is controlled to the third speed until the coolant inlet temperature of the vehicle battery is lower than the second preset temperature.

[0033] Optionally, the battery operating state includes emergency parking state.

[0034] The step of controlling the plurality of battery thermal management controllers according to their respective operating modes and / or battery operating states includes:

[0035] When the battery is in the emergency parking state, the valve opening is controlled to the third degree to ensure that all battery coolant flows through the radiator in the battery coolant pipeline circuit for heat dissipation; and

[0036] When the battery is in the emergency parking state, the duty cycle of the cooling fan is controlled to the third duty cycle, and the speed of the battery coolant pump is controlled to the fourth speed, until the coolant inlet temperature of the vehicle battery is lower than the third preset temperature.

[0037] Optionally, it is characterized in that,

[0038] When the fan controller is in the automatic mode, the fan controller controls the cooling fan based on the difference between the set value of the coolant inlet temperature of the vehicle battery and the actual value of the coolant inlet temperature of the vehicle battery.

[0039] When the valve controller is in the automatic mode, the valve controller controls the valve based on the difference between the set value of the coolant inlet temperature of the vehicle battery and the actual value of the coolant inlet temperature of the vehicle battery; and

[0040] When the water pump controller is in the automatic mode, the water pump controller controls the water pump based on the difference between the actual value of the coolant inlet temperature of the vehicle battery and the actual value of the coolant outlet temperature of the vehicle battery.

[0041] This disclosure also provides a vehicle battery thermal management control device, the device comprising:

[0042] The first acquisition module is used to acquire the battery operating status of the vehicle battery;

[0043] The first determining module is used to control the working mode of multiple battery thermal management controllers according to the battery working state. The multiple battery thermal management controllers include a fan controller, a water pump controller, and a valve controller. The fan controller is used to control the cooling fan in the vehicle, the water pump controller is used to control the battery coolant water pump in the vehicle, and the valve controller is used to control the valve in the battery coolant pipeline circuit in the vehicle. The valve is used to control the degree of heat dissipation of the battery coolant.

[0044] The first control module is used to control the plurality of battery thermal management controllers according to their respective operating modes and / or the battery operating state, so as to achieve heat dissipation of the vehicle battery.

[0045] This disclosure also provides a vehicle including the vehicle battery thermal management control device described above.

[0046] The above technical solution can refine the working strategy of each battery thermal management controller by using different working modes according to the working state of the battery in the vehicle. This can ensure that the vehicle battery can work under a stable ambient temperature according to the needs of the vehicle or the vehicle battery, thereby ensuring the driving safety of the vehicle.

[0047] Other features and advantages of the present disclosure will be described in detail in the following detailed description. Attached Figure Description

[0048] The accompanying drawings are used to provide a further understanding of the present disclosure and constitute a part of the specification. Together with the following detailed description, they are used to explain the present disclosure but do not constitute a limitation of the present disclosure. In the accompanying drawings:

[0049] Figure 1 This is a flowchart illustrating a vehicle battery thermal management control method according to an exemplary embodiment of the present disclosure.

[0050] Figure 2 This is a flowchart illustrating a vehicle battery thermal management control method according to yet another exemplary embodiment of this disclosure.

[0051] Figure 3 This is a structural block diagram of a vehicle battery thermal management control device according to an exemplary embodiment of the present disclosure. Detailed Implementation

[0052] The following describes the specific embodiments of the present disclosure in detail with reference to the accompanying drawings. It should be understood that the specific embodiments described herein are only used to illustrate and explain the present disclosure and are not intended to limit the present disclosure.

[0053] Figure 1 This is a flowchart illustrating a vehicle battery thermal management control method according to an exemplary embodiment of this disclosure. Figure 1 As shown, the method includes steps 101 to 103.

[0054] In step 101, the battery operating status of the vehicle battery is obtained.

[0055] The vehicle's battery could be, for example, a fuel cell.

[0056] The battery's operating status can be obtained directly through the vehicle controller, or it can be determined by acquiring the vehicle's status. The vehicle status corresponding to the battery's operating status can be pre-set, allowing the vehicle controller to determine the battery's operating status based on the vehicle status. Alternatively, the vehicle controller can actively determine the battery's operating status by acquiring the vehicle status from its own data.

[0057] The battery's operating states can include, for example, initialization state, preheating state, vehicle driving state, hot standby state, normal parking state, and emergency parking state. The initialization state is the state of the vehicle battery when the vehicle is powered on and started. The preheating state is the state of the vehicle battery when the engine is started but the vehicle is not moving. The vehicle driving state is the state of the vehicle battery while the vehicle is in motion. The hot standby state is the state of the vehicle battery when the vehicle has been driven for a period of time and then stopped but the power has not been deactivated. The normal parking state and the emergency parking state can be distinguished based on the magnitude of the braking force. If the vehicle braking force is greater than a set value, the vehicle battery is considered to be in emergency parking state; if the vehicle braking force is less than a set value, the vehicle battery is considered to be in normal parking state.

[0058] In step 102, the operating modes of multiple battery thermal management controllers are controlled according to the battery operating state. The multiple battery thermal management controllers include a fan controller, a water pump controller, and a valve controller. The fan controller is used to control the cooling fan in the vehicle, the water pump controller is used to control the battery coolant water pump in the vehicle, and the valve controller is used to control the valve in the battery coolant pipeline circuit in the vehicle. The valve is used to control the degree of heat dissipation of the battery coolant.

[0059] The cooling fan can be used to cool the vehicle battery, as well as other equipment in the vehicle. The battery coolant pump and the valve can control the water pressure, flow rate, and flow volume in the battery coolant piping circuit, thereby achieving heat dissipation for the vehicle battery through the battery coolant.

[0060] In step 103, the plurality of battery thermal management controllers are controlled according to their respective operating modes and / or the battery operating state to achieve heat dissipation of the vehicle battery.

[0061] Once the battery operating state of the vehicle battery is determined, the operating mode of each of the aforementioned battery thermal management controllers can be determined. Then, based on the operating mode of the corresponding battery operating state and / or the battery operating state of the vehicle battery, the control strategy corresponding to each battery thermal management controller can be determined.

[0062] The above technical solution can refine the working strategy of each battery thermal management controller by using different working modes according to the working state of the battery in the vehicle. This can ensure that the vehicle battery can work under a stable ambient temperature according to the needs of the vehicle or the vehicle battery, thereby ensuring the driving safety of the vehicle.

[0063] In one possible implementation, determining the operating mode of the plurality of battery thermal management controllers based on the battery operating state can be done as shown in Table 1 below.

[0064] Table 1

[0065]

[0066] The "√" in Table 1 indicates that the battery thermal management controller is in automatic mode. This automatic mode means that the battery thermal management controller can automatically control the cooling fan, water pump, and valves based on the collected status data. When the battery thermal management controller is not in automatic mode, it will control the cooling fan, water pump, and valves according to other control strategies, such as the battery's operating state.

[0067] The first speed requirement is the speed requirement of the cooling fan in the vehicle excluding the vehicle battery, and the second speed requirement is the speed requirement of the cooling fan from the vehicle battery.

[0068] Figure 2 This is a flowchart illustrating a vehicle battery thermal management control method according to yet another exemplary embodiment of this disclosure. Figure 2 As shown, the method includes steps 201 to 219.

[0069] In step 201, it is determined whether the battery is in the initialization state. If yes, proceed to step 202; otherwise, proceed to step 206.

[0070] In step 202, that is, when the battery is in the initialization state, it is determined whether the conductivity concentration of the battery coolant is lower than the preset concentration threshold. If yes, proceed to step 203; otherwise, proceed to step 204.

[0071] In step 203, that is, when the conductivity concentration is lower than a preset concentration threshold, the valve opening is controlled to a first opening so that the battery coolant does not flow through the radiator in the battery coolant pipeline circuit for heat dissipation; and the battery coolant pump speed is controlled to a first speed, and the cooling fan duty cycle is controlled to a first duty cycle.

[0072] In step 204, that is, when the conductivity concentration is not lower than the concentration threshold, the valve opening is controlled to a second opening, so that a portion of the battery coolant flows through the radiator in the battery coolant pipeline circuit for heat dissipation, while another portion of the battery coolant does not flow through the radiator in the battery coolant pipeline circuit for heat dissipation; and the battery coolant pump speed is controlled to a first speed, and the cooling fan duty cycle is controlled to a first duty cycle.

[0073] The preset concentration threshold can be, for example, 5 µS / cm.

[0074] The valve can be, for example, a three-way valve, used to connect a battery coolant pipeline circuit that flows directly back to the fuel cell stack without cooling, and a battery coolant pipeline circuit that cools the battery coolant. This allows control over the valve opening to regulate whether the battery coolant is cooled before flowing back to the fuel cell stack, whether it is partially or completely cooled, and the flow rate after cooling, etc.

[0075] The first rotational speed and the first duty cycle can be determined by other controllers, such as the battery control unit (FCU) of the vehicle battery or the powertrain control unit (PCU) in the vehicle, based on the actual state of the vehicle battery, and are used to control the multiple battery thermal management controllers.

[0076] In step 205, it is determined whether the battery is in a preheating state. If yes, proceed to step 206; otherwise, proceed to step 208.

[0077] In step 206, that is, when the battery is in the preheating state, it is determined that the fan controller and the water pump controller are in automatic mode.

[0078] In step 207, that is, when the battery is in the preheating state, the opening degree of the valve is controlled to the first opening degree so that the battery coolant does not flow through the radiator in the battery coolant pipeline circuit for heat dissipation.

[0079] This automatic mode allows each battery thermal management controller to automatically control the cooling fan, battery coolant pump, and valves based on collected status data. For example, when the fan controller is in automatic mode, it controls the cooling fan based on the difference between the setpoint and the actual coolant inlet temperature of the vehicle battery; when the valve controller is in automatic mode, it controls the valve based on the difference between the setpoint and the actual coolant inlet temperature of the vehicle battery; and when the pump controller is in automatic mode, it controls the pump based on the difference between the actual coolant inlet temperature and the actual coolant outlet temperature of the vehicle battery.

[0080] By automatically controlling the fan controller and the battery coolant pump controller, and by controlling the valve controller through the battery control unit (FCU) and the power system control unit (PCU), the appropriate battery temperature can be ensured.

[0081] In step 208, it is determined whether the battery's working state is the same as the vehicle's driving state. If yes, proceed to step 209; otherwise, proceed to step 214.

[0082] In step 209, that is, when the battery is in the vehicle driving state, it is determined whether the first speed requirement of the cooling fan in the vehicle other than the vehicle battery is less than the second speed requirement of the cooling fan in the vehicle battery. If yes, proceed to step 210; otherwise, proceed to step 212.

[0083] In step 210, that is, when the first speed requirement is less than the second speed requirement, the fan controller and the water pump controller are controlled to be in automatic mode.

[0084] In step 211, that is, when the battery is in the vehicle driving state and the valve controller is not in the automatic mode, the valve opening is controlled to the third opening so that all the battery coolant flows through the radiator in the battery coolant pipeline circuit for heat dissipation.

[0085] In step 212, that is, when the first speed requirement is not less than the second speed requirement, the pump controller and the valve controller are both controlled to be in the automatic mode.

[0086] In step 213, that is, when the battery is in the vehicle driving state and the fan controller is not in the automatic mode, the speed of the cooling fan is controlled according to the first speed requirement.

[0087] The first, second, and third opening degrees of the valve can all be set according to actual conditions, as long as the corresponding battery coolant circulation can be achieved under different opening degree settings. The first, second, and third opening degrees can all be preset opening ranges.

[0088] The first speed requirement can be based on the speed requirements of the cooling fan, such as other cooling circuits in the vehicle besides the vehicle battery and air conditioning pressure.

[0089] In step 214, it is determined whether the battery is in a hot standby state. If yes, proceed to step 215; otherwise, proceed to step 216.

[0090] In step 215, that is, when the battery is in the hot standby state, the valve opening is controlled to a third opening degree so that all the battery coolant flows through the radiator in the battery coolant pipeline circuit for heat dissipation; the duty cycle of the cooling fan is controlled to a second duty cycle, and the speed of the battery coolant pump is controlled to a second speed, until the coolant inlet temperature of the vehicle battery is lower than a first preset temperature. After the coolant inlet temperature is lower than the first preset temperature, the cooling fan and the battery coolant pump can be stopped.

[0091] In step 216, it is determined whether the battery is in a normal parking state. If yes, proceed to step 217; otherwise, proceed to step 219.

[0092] In step 217, that is, when the battery is in the normal parking state, the fan controller is controlled to be in automatic mode.

[0093] In step 218, that is, when the battery is in the normal parking state, the valve opening is controlled to a third opening degree so that all the battery coolant flows through the radiator in the battery coolant pipeline circuit for heat dissipation; and the battery coolant pump speed is controlled to a third speed until the coolant inlet temperature of the vehicle battery is lower than a second preset temperature. If the inlet temperature is lower than the first preset temperature, the cooling fan and the battery coolant pump can be stopped. If the coolant inlet temperature is lower than the second preset temperature, the battery coolant pump can be stopped.

[0094] When the battery is in the normal parking state and the fan controller is in automatic mode controlling the cooling fan, the cooling fan can also be stopped after determining that the coolant inlet temperature is lower than the second preset temperature.

[0095] In step 219, that is, when the battery is in the emergency parking state, the valve opening is controlled to the third opening degree so that all the battery coolant flows through the radiator in the battery coolant pipeline circuit for heat dissipation; the duty cycle of the cooling fan is controlled to the third duty cycle, and the speed of the battery coolant pump is controlled to the fourth speed, until the coolant inlet temperature of the vehicle battery is lower than the third preset temperature. After the coolant inlet temperature is lower than the third preset temperature, the cooling fan and the battery coolant pump can be stopped.

[0096] The first preset temperature can be, for example, 70 degrees, the second preset temperature can be, for example, 65 degrees, and the third preset temperature can also be, for example, 65 degrees. In practical applications, the first preset temperature, the second preset temperature, and the third preset temperature can be equal or unequal, and their calibration values ​​can be modified according to the actual situation.

[0097] The aforementioned first, second, third, and fourth speeds, as well as the first and second duty cycles, may be equal or unequal in practical applications. These multiple speed values ​​or duty cycle values ​​can be selected from a preset calibration table by the battery control unit (FCU) and the powertrain control unit (PCU), etc., based on the actual vehicle conditions.

[0098] Figure 3 This is a structural block diagram of a vehicle battery thermal management control device according to an exemplary embodiment disclosed herein. Figure 3As shown, the device includes: an acquisition module 10 for acquiring the battery operating state of the vehicle battery; a first control module 20 for controlling the operating modes of multiple battery thermal management controllers according to the battery operating state, the multiple battery thermal management controllers including: a fan controller, a water pump controller, and a valve controller, the fan controller controlling the cooling fan in the vehicle, the water pump controller controlling the battery coolant water pump in the vehicle, and the valve controller controlling the valves in the battery coolant pipeline circuit in the vehicle, the valves controlling the degree of heat dissipation of the battery coolant; and a second control module 30 for controlling the multiple battery thermal management controllers according to their respective operating modes and / or the battery operating state, so as to achieve heat dissipation of the vehicle battery.

[0099] The above technical solution can refine the working strategy of each battery thermal management controller by using different working modes according to the working state of the battery in the vehicle. This can ensure that the vehicle battery can work under a stable ambient temperature according to the needs of the vehicle or the vehicle battery, thereby ensuring the driving safety of the vehicle.

[0100] In one possible implementation, the battery operating state includes an initialization state, and the second control module 30 is further configured to: control the valve according to the conductivity concentration of the battery coolant when the battery operating state is the initialization state, control the speed of the battery coolant pump to a first speed, and control the duty cycle of the cooling fan to a first duty cycle.

[0101] In one possible implementation, the second control module 30 is further configured to: control the valve opening to a first opening degree when the conductivity concentration is lower than a preset concentration threshold, so that the battery coolant does not flow through the radiator in the battery coolant pipeline circuit for heat dissipation; and control the valve opening to a second opening degree when the conductivity concentration is not lower than the concentration threshold, so that a portion of the battery coolant flows through the radiator in the battery coolant pipeline circuit for heat dissipation, while another portion of the battery coolant does not flow through the radiator in the battery coolant pipeline circuit for heat dissipation.

[0102] In one possible implementation, the battery operating state includes a preheating state, and the first control module 20 is further configured to: control the fan controller and the water pump controller to be in automatic mode when the battery operating state is the preheating state; the second control module 30 is further configured to: control the opening degree of the valve to a first opening degree when the battery operating state is the preheating state, so that the battery coolant does not flow through the radiator in the battery coolant pipeline circuit for heat dissipation.

[0103] In one possible implementation, the battery operating state includes the vehicle driving state, and the first control module 20 is further configured to: when the battery operating state is the vehicle driving state, acquire the first speed requirement of the vehicle (excluding the vehicle battery) for the cooling fan, and the second speed requirement of the vehicle battery for the cooling fan; when the first speed requirement is less than the second speed requirement, control the fan controller and the water pump controller to be in automatic mode; when the first speed requirement is not less than the second speed requirement, control the fan controller to be in the first mode, and determine that the water pump controller and the valve controller are both in the automatic mode.

[0104] In one possible implementation, the second control module 30 is further configured to: control the valve opening to a third opening when the battery is in the vehicle driving state and the valve controller is not in the automatic mode, so that all the battery coolant flows through the radiator in the battery coolant pipeline circuit for heat dissipation; and control the speed of the cooling fan according to the first speed requirement when the battery is in the vehicle driving state and the fan controller is not in the automatic mode.

[0105] In one possible implementation, the battery operating state includes a hot standby state, and the second control module 30 is further configured to: control the opening degree of the valve to a third opening degree when the battery operating state is the hot standby state, so that all the battery coolant flows through the radiator in the battery coolant pipeline circuit for heat dissipation; control the duty cycle of the cooling fan to a second duty cycle and control the speed of the battery coolant water pump to a second speed when the battery operating state is the hot standby state, until the coolant inlet temperature of the vehicle battery is lower than a first preset temperature.

[0106] In one possible implementation, the battery operating state includes a normal parking state. The first control module 20 is further configured to: control the fan controller to be in automatic mode when the battery operating state is the normal parking state; the second control module 30 is further configured to: control the valve opening to a third opening degree when the battery operating state is the normal parking state, so that all the battery coolant flows through the radiator in the battery coolant pipeline circuit for heat dissipation; and control the battery coolant pump speed to a third speed when the battery operating state is the hot standby state, until the coolant inlet temperature of the vehicle battery is lower than a second preset temperature.

[0107] In one possible implementation, the battery operating state includes an emergency parking state, and the second control module 30 is further configured to: control the opening degree of the valve to a third opening degree when the battery operating state is the emergency parking state, so that all the battery coolant flows through the radiator in the battery coolant pipeline circuit for heat dissipation; and control the duty cycle of the cooling fan to a third duty cycle and control the speed of the battery coolant water pump to a fourth speed when the battery operating state is the emergency parking state, until the coolant inlet temperature of the vehicle battery is lower than a third preset temperature.

[0108] In one possible implementation, the fan controller, when in the automatic mode, controls the cooling fan based on the difference between a setpoint for the coolant inlet temperature of the vehicle battery and the actual coolant inlet temperature of the vehicle battery; the valve controller, when in the automatic mode, controls the valve based on the difference between the setpoint for the coolant inlet temperature of the vehicle battery and the actual coolant inlet temperature of the vehicle battery; and the water pump controller, when in the automatic mode, controls the water pump based on the difference between the actual coolant inlet temperature of the vehicle battery and the actual coolant outlet temperature of the vehicle battery.

[0109] This disclosure also provides a vehicle, characterized in that it includes the vehicle battery thermal management control device described above.

[0110] Regarding the apparatus in the above embodiments, the specific manner in which each module performs its operation has been described in detail in the embodiments related to the method, and will not be elaborated upon here.

[0111] The preferred embodiments of this disclosure have been described in detail above with reference to the accompanying drawings. However, this disclosure is not limited to the specific details of the above embodiments. Within the scope of the technical concept of this disclosure, various simple modifications can be made to the technical solutions of this disclosure, and these simple modifications all fall within the protection scope of this disclosure.

[0112] It should also be noted that the various specific technical features described in the above specific embodiments can be combined in any suitable manner without contradiction. To avoid unnecessary repetition, the present disclosure will not further describe various possible combinations.

[0113] In addition, the various embodiments of the present disclosure may be arbitrarily combined, and as long as they do not violate the concept of the present disclosure, they should also be regarded as the contents disclosed by the present disclosure.

Claims

1. A method for controlling thermal management of a vehicle battery, characterized in that, The method includes: Obtain the battery operating status of the vehicle battery; The operating modes of multiple battery thermal management controllers are controlled according to the battery's operating state. The multiple battery thermal management controllers include a fan controller, a water pump controller, and a valve controller. The fan controller is used to control the cooling fan in the vehicle, the water pump controller is used to control the battery coolant water pump in the vehicle, and the valve controller is used to control the valves in the battery coolant pipeline circuit in the vehicle. The valves are used to control the degree of heat dissipation of the battery coolant. The plurality of battery thermal management controllers are controlled according to their respective operating modes and / or the battery operating state to achieve heat dissipation of the vehicle battery. The battery operating state includes an initialization state; the control of the multiple battery thermal management controllers according to their respective operating modes and / or the battery operating state includes: when the battery operating state is the initialization state, controlling the valve according to the conductivity concentration of the battery coolant, controlling the speed of the battery coolant pump to a first speed, and controlling the duty cycle of the cooling fan to a first duty cycle. The method of controlling the valve based on the conductivity concentration of the battery coolant includes: When the conductivity concentration is lower than a preset concentration threshold, the valve opening is controlled to a first opening degree so that the battery coolant does not flow through the radiator in the battery coolant pipeline circuit for heat dissipation. When the conductivity concentration is not lower than the concentration threshold, the valve opening is controlled to a second opening, so that a portion of the battery coolant flows through the radiator in the battery coolant pipeline circuit for heat dissipation, while another portion of the battery coolant does not flow through the radiator in the battery coolant pipeline circuit for heat dissipation.

2. The method according to claim 1, characterized in that, The battery operating states include a preheating state; The method of controlling the operation mode of multiple battery thermal management controllers according to the battery operating state includes: when the battery operating state is the preheating state, controlling the fan controller and water pump controller to be in automatic mode; The step of controlling the plurality of battery thermal management controllers according to their respective operating modes and / or the battery operating state includes: when the battery operating state is the preheating state, controlling the opening degree of the valve to a first opening degree so that the battery coolant does not flow through the radiator in the battery coolant pipeline circuit for heat dissipation.

3. The method according to claim 1, characterized in that, The battery operating state includes the vehicle driving state; The operating modes of controlling multiple battery thermal management controllers according to the battery operating state include: When the battery is in the vehicle driving state, the first speed requirement of the vehicle other than the vehicle battery for the cooling fan and the second speed requirement of the vehicle battery for the cooling fan are obtained. When the first speed requirement is less than the second speed requirement, the fan controller and the water pump controller are controlled to be in automatic mode; When the first speed requirement is not less than the second speed requirement, the water pump controller and the valve controller are controlled to be in the automatic mode.

4. The method according to claim 3, characterized in that, The step of controlling the plurality of battery thermal management controllers according to their respective operating modes and / or battery operating states includes: When the battery is in the vehicle driving state and the valve controller is not in the automatic mode, the valve opening is controlled to the third opening so that all the battery coolant flows through the radiator in the battery coolant pipeline circuit for heat dissipation. When the battery is in the vehicle driving state and the fan controller is not in the automatic mode, the speed of the cooling fan is controlled according to the first speed requirement.

5. The method according to claim 1, characterized in that, The battery operating states include a hot standby state; The step of controlling the plurality of battery thermal management controllers according to their respective operating modes and / or battery operating states includes: When the battery is in the hot standby state, the valve opening is controlled to the third degree so that all the battery coolant flows through the radiator in the battery coolant pipeline circuit for heat dissipation; and When the battery is in the hot standby state, the duty cycle of the cooling fan is controlled to the second duty cycle, and the speed of the battery coolant pump is controlled to the second speed, until the coolant inlet temperature of the vehicle battery is lower than the first preset temperature.

6. The method according to claim 1, characterized in that, The battery operating states include normal parking state. The method of controlling the operation mode of multiple battery thermal management controllers according to the battery operating state includes: when the battery operating state is the normal parking state, controlling the fan controller to be in automatic mode; The step of controlling the plurality of battery thermal management controllers according to their respective operating modes and / or battery operating states includes: When the battery is in the normal parking state, the valve opening is controlled to the third degree so that all the battery coolant flows through the radiator in the battery coolant pipeline circuit for heat dissipation; and When the battery is in the normal parking state, the speed of the battery coolant pump is controlled to the third speed until the coolant inlet temperature of the vehicle battery is lower than the second preset temperature.

7. The method according to claim 1, characterized in that, The battery operating states include emergency parking state. The step of controlling the plurality of battery thermal management controllers according to their respective operating modes and / or battery operating states includes: When the battery is in the emergency parking state, the valve opening is controlled to the third degree to ensure that all battery coolant flows through the radiator in the battery coolant pipeline circuit for heat dissipation; and When the battery is in the emergency parking state, the duty cycle of the cooling fan is controlled to the third duty cycle, and the speed of the battery coolant pump is controlled to the fourth speed, until the coolant inlet temperature of the vehicle battery is lower than the third preset temperature.

8. The method according to any one of claims 2-4 and 7, characterized in that, When the fan controller is in automatic mode, the fan controller controls the cooling fan based on the difference between the set value of the coolant inlet temperature of the vehicle battery and the actual value of the coolant inlet temperature of the vehicle battery. When the valve controller is in the automatic mode, the valve controller controls the valve based on the difference between the set value of the coolant inlet temperature of the vehicle battery and the actual value of the coolant inlet temperature of the vehicle battery; and When the water pump controller is in the automatic mode, the water pump controller controls the water pump based on the difference between the actual value of the coolant inlet temperature of the vehicle battery and the actual value of the coolant outlet temperature of the vehicle battery.

9. A vehicle battery thermal management control device, characterized in that, The device includes: The first acquisition module is used to acquire the battery operating status of the vehicle battery; The first control module is used to control the working mode of multiple battery thermal management controllers according to the battery working state. The multiple battery thermal management controllers include a fan controller, a water pump controller, and a valve controller. The fan controller is used to control the cooling fan in the vehicle, the water pump controller is used to control the battery coolant water pump in the vehicle, and the valve controller is used to control the valve in the battery coolant pipeline circuit in the vehicle. The valve is used to control the degree of heat dissipation of the battery coolant. The second control module is used to control the multiple battery thermal management controllers according to their respective operating modes and / or the battery operating state, so as to achieve heat dissipation of the vehicle battery. The battery operating state includes an initialization state. The second control module is further configured to: control the valve according to the conductivity concentration of the battery coolant when the battery operating state is the initialization state, control the speed of the battery coolant water pump to a first speed, and control the duty cycle of the cooling fan to a first duty cycle. The second control module is further configured to: when the conductivity concentration is lower than a preset concentration threshold, control the valve opening to a first opening degree so that the battery coolant does not flow through the radiator in the battery coolant pipeline circuit for heat dissipation; and when the conductivity concentration is not lower than the concentration threshold, control the valve opening to a second opening degree so that a portion of the battery coolant flows through the radiator in the battery coolant pipeline circuit for heat dissipation, while another portion of the battery coolant does not flow through the radiator in the battery coolant pipeline circuit for heat dissipation.

10. A vehicle, characterized in that, Includes the vehicle battery thermal management control device as described in claim 9.

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