Vehicle thermal management method and device and vehicle

Abstract

The invention relates to the technical field of automobiles, and particularly discloses a vehicle thermal management method and a vehicle. The method comprises the steps that it is determined that an engine of a target vehicle is in an idling state, and the engine charges a battery pack at high power; obtaining the remaining capacity of the battery pack and related temperature information; the related temperature information comprises a battery pack body temperature, a battery pack inlet water temperature and a battery pack control module water temperature; determining that the remaining capacity of the battery pack and the related temperature information meet temperature adjusting conditions; and determining a corresponding temperature adjustment action based on the temperature adjustment condition. And corresponding temperature adjusting modes are determined according to different battery pack and part temperature conditions, so that the temperature of a battery pack body and the water temperature of a battery pack control module are controlled within a preset temperature interval, and low-voltage balance of a target vehicle in a high-power idling energy complementing mode is guaranteed.

Description

Technical Field

[0001] This application relates to the field of automotive technologies, and particularly to a vehicle thermal management method, device, and vehicle. Background Art

[0002] Idle charging refers to a technology that uses the excess energy generated by the engine to charge the battery pack while the vehicle is not turned off and the engine is idling. When the vehicle is operating in a high-temperature environment, such as running in a high-temperature desert or idling for charging at a summer campsite, due to the operating conditions of the vehicle and the current driving speed being zero or approaching zero, only the fan is used to dissipate heat from the front-end module of the vehicle. At this time, it is necessary to cool and dissipate heat from areas such as the motor, passenger compartment, and battery. Otherwise, the heat exchange conditions of the low-temperature radiator will deteriorate. Under such conditions, when cooling the battery and the passenger compartment through air conditioning refrigeration, if the heat load of the condenser is too high, it will cause the temperature of the outside air entering the low-temperature radiator to rise, and then cause the water temperature of the low-temperature circuit to exceed the limit, resulting in thermal protection of each component in the low-temperature circuit, performance degradation, and even functional failure. At the same time, the inlet water temperature of the on-board charger (OBC) rises. After exceeding the limit, it will cause the DC / DC converter to limit power, unable to meet the low-voltage power balance of the vehicle, resulting in abnormal air volume of the blower, and ultimately causing the vehicle to be unable to power on after it stalls.

[0003] Therefore, how to provide an idle charging control method that can avoid the DC / DC converter of the vehicle from limiting power and ensure the low-voltage power balance of the vehicle has become a technical problem that needs to be urgently solved by those skilled in the art. Summary of the Invention

[0004] In view of the above problems, the present disclosure provides a vehicle thermal management method, device, and vehicle that overcome or at least partially solve the above problems, and the technical solutions are as follows:

[0005] A vehicle thermal management method includes: determining that the engine of the target vehicle is in an idle state and the engine is charging the battery pack at high power; obtaining the remaining battery charge and relevant temperature information; the relevant temperature information includes the temperature of the battery pack body, the inlet water temperature of the battery pack, and the water temperature of the battery pack control module; determining that the remaining battery charge and the relevant temperature information meet the temperature adjustment conditions; and determining corresponding temperature adjustment actions based on the temperature adjustment conditions.

[0006] Optionally, the temperature adjustment actions include: adjusting at least one of the valve opening of the refrigerant valve on the battery side, the valve opening of the coolant valve of the low-temperature radiator, controlling the start and stop of the heater core water pump, and the blower speed.

[0007] Optionally, determining that the remaining power of the battery pack and the relevant temperature information meet the temperature adjustment condition specifically includes: determining that the remaining power of the battery pack is lower than a preset power threshold; determining a first temperature difference between the temperature of the battery pack body and the water temperature at the inlet of the battery pack; determining that the temperature difference is lower than a first preset temperature, or the temperature of the battery pack body is higher than a second preset temperature; then the relevant temperature information meets the first temperature adjustment condition.

[0008] Optionally, determining the corresponding temperature adjustment action based on the temperature adjustment condition specifically includes: determining that the relevant temperature information meets the first temperature adjustment condition; determining a second temperature difference between the temperature of the battery pack body and the second preset temperature; determining a first valve opening adjustment amount of the refrigerant valve body on the battery side based on the second temperature difference and a first preset calibration coefficient; adjusting the valve opening of the refrigerant valve body on the battery side based on the first valve opening adjustment amount.

[0009] Optionally, determining that the remaining power of the battery pack and the relevant temperature information meet the temperature adjustment condition specifically includes: determining that the remaining power of the battery pack is higher than a preset power threshold; determining that the temperature of the battery pack body is higher than a second preset temperature, or the water temperature of the battery pack control module is higher than a third preset temperature; then the relevant temperature information meets the second temperature adjustment condition.

[0010] Optionally, determining the corresponding temperature adjustment action based on the temperature adjustment condition specifically includes: determining that the relevant temperature information meets the second temperature adjustment condition; if the temperature of the battery pack body is higher than the second preset temperature and the water temperature of the battery pack control module is not higher than the third preset temperature; determining a second temperature difference between the temperature of the battery pack body and the second preset temperature; determining a first valve opening adjustment amount of the refrigerant valve body on the battery side based on the second temperature difference and a second preset calibration coefficient; adjusting the valve opening of the refrigerant valve body on the battery side based on the first valve opening adjustment amount.

[0011] Optionally, determining the corresponding temperature adjustment action based on the temperature adjustment condition specifically includes: determining that the relevant temperature information meets the second temperature adjustment condition; if the water temperature of the battery pack control module is higher than the third preset temperature; determining a second temperature difference between the temperature of the battery pack body and the second preset temperature and a third temperature difference between the water temperature of the battery pack control module and the third preset temperature; determining a first valve opening adjustment amount of the refrigerant valve body on the battery side and a second valve opening adjustment amount of the coolant valve body of the low-temperature radiator based on the second temperature difference, the third temperature difference, a third preset calibration coefficient, and a fourth preset calibration coefficient; adjusting the valve openings of the corresponding valve bodies based on the first valve opening adjustment amount and the second valve opening adjustment amount; controlling the warm air core body water pump to start and increasing the blower gear.

[0012] Optionally, determining that the remaining power of the battery pack and the relevant temperature information meet the temperature adjustment condition specifically includes: determining that the water pump of the heater core is in an open state; determining that the temperature of the battery pack body is higher than a second preset temperature, or the water temperature of the battery pack control module is higher than a third preset temperature; then the relevant temperature information meets the third temperature adjustment condition.

[0013] Optionally, determining the corresponding temperature adjustment action based on the temperature adjustment condition specifically includes: determining that the temperature of the battery pack body is not higher than the second preset temperature, and the water temperature of the battery pack control module is higher than the third preset temperature; determining the third temperature difference between the water temperature of the battery pack control module and the third preset temperature; determining the second valve opening adjustment amount of the low-temperature radiator coolant valve body based on the third temperature difference and a fifth preset calibration coefficient; adjusting the valve opening of the low-temperature radiator coolant valve body based on the second valve opening adjustment amount.

[0014] Optionally, determining the corresponding temperature adjustment action based on the temperature adjustment condition specifically includes: determining that the temperature of the battery pack body is higher than the second preset temperature, and the water temperature of the battery pack control module is not higher than the third preset temperature; keeping the valve opening of the refrigerant valve body on the battery side unchanged, closing the valve opening of the low-temperature radiator coolant valve body flowing to the battery cooler side, and controlling the water pump of the heater core to close.

[0015] Optionally, determining the corresponding temperature adjustment action based on the temperature adjustment condition specifically includes: when the temperature of the battery pack body is higher than the second preset temperature, and the water temperature of the battery pack control module is higher than the third preset temperature; switching the target vehicle from the high-power idle charging mode to the low-power idle charging mode.

[0016] Optionally, after obtaining the remaining power of the battery pack and the relevant temperature information, the method further includes: receiving a charging tendency instruction from a user, the types of the charging tendency instruction including a charging power tendency instruction and a fuel efficiency tendency instruction; determining a first reward coefficient and a second reward coefficient in a preset reward function based on the charging tendency instruction; obtaining a pre-calibrated engine speed correspondence relationship, the engine speed correspondence relationship including a first correspondence relationship between the engine speed and the charging power, and a second correspondence relationship between the engine speed and the fuel efficiency; determining the target engine speed with the highest reward value based on the first correspondence relationship, the second correspondence relationship, the first reward coefficient, the second reward coefficient, and the preset reward function; using the target engine speed as the engine speed of the target vehicle.

[0017] The present application also provides a vehicle thermal management device, including: a state determination module, which determines that the engine of the target vehicle is in an idle state and the engine is for high-power charging of the battery pack; an information acquisition module, which acquires the remaining power of the battery pack and relevant temperature information; the relevant temperature information includes the temperature of the battery pack body, the water temperature at the inlet of the battery pack, and the water temperature of the battery pack control module; a temperature adjustment module, which determines that the remaining power of the battery pack and the relevant temperature information meet the temperature adjustment conditions; and based on the temperature adjustment conditions, determines corresponding temperature adjustment actions.

[0018] The present application also provides a vehicle, which includes: a memory for storing executable program code; a processor for calling and running the executable program code from the memory, so that the vehicle executes the steps of the method described in any one of the above examples.

[0019] The technical solution proposed by the present application can bring the following beneficial effects:

[0020] 1. By monitoring the remaining power of the battery pack and the relevant temperature information, corresponding temperature adjustment actions are determined, so as to control the temperature of the parts related to the high-power idle charging mode within a preset temperature range, avoid power limitation of the vehicle DC / DC converter, and ensure the balance of the vehicle's low-voltage power.

[0021] 2. By determining the temperature difference between the temperature of the relevant parts and the preset temperature, the valve opening of different valves is adjusted, and the temperature can be adjusted according to the current actual situation, making the temperature adjustment action more flexible and adapting to the changing vehicle conditions.

[0022] 3. When adjusting the temperature, by turning on the warm air core water pump, the coolant circulates between the warm air core and the plate heat exchanger, so that the heat of the warm air core and the cold air of the evaporator form mixed air, and the blower speed is increased. While adjusting the temperature, the cooling demand of the passengers in the vehicle is met.

[0023] 4. It can select the engine speed that best meets the user's needs according to the user's charging preference, so as to balance the user's fuel efficiency and charging efficiency requirements.

[0024] The above description is only an overview of the technical solution of the present disclosure. In order to be able to understand the technical means of the present disclosure more clearly, it can be implemented according to the content of the description. And in order to make the above and other purposes, features and advantages of the present disclosure more obvious and understandable, the specific embodiments of the present disclosure are given below. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Various other advantages and benefits will become apparent to those of ordinary skill in the art by reading the following detailed description of the preferred embodiments. The drawings are only for the purpose of illustrating the preferred embodiments and are not considered to be a limitation of the present disclosure. Also, throughout the drawings, the same reference numerals are used to represent the same components. In the drawings:

[0026] Figure 1 is a schematic flow chart of a vehicle thermal management method in an embodiment of the present application;

[0027] Figure 2 is a schematic application structure diagram of a vehicle thermal management method in an embodiment of the present application;

[0028] Figure 3 is a schematic flow chart of a high-power idle charging condition confirmation process in an embodiment of the present application;

[0029] Figure 4 is a schematic flow chart of a temperature regulation condition and temperature regulation action confirmation process in an embodiment of the present application;

[0030] Figure 5 is a schematic flow chart of a temperature regulation condition confirmation process in an embodiment of the present application;

[0031] Figure 6 is a schematic flow chart of a temperature regulation action confirmation process in an embodiment of the present application;

[0032] Figure 7 is a schematic flow chart of another temperature regulation condition confirmation process in an embodiment of the present application;

[0033] Figure 8 is a schematic flow chart of another temperature regulation action confirmation process in an embodiment of the present application;

[0034] Figure 9 is a schematic structure diagram of a vehicle thermal management device in an embodiment of the present application. Detailed Embodiments

[0035] The exemplary embodiments of the present disclosure will be described in more detail below with reference to the drawings. Although the exemplary embodiments of the present disclosure are shown in the drawings, it should be understood that the present disclosure can be implemented in various forms and should not be limited by the embodiments set forth herein. On the contrary, these embodiments are provided so that the present disclosure can be more thoroughly understood and the scope of the present disclosure can be completely conveyed to those skilled in the art. The technical solutions provided by the embodiments of the present application are described in detail below with reference to the drawings.

[0036] When the vehicle is idling for charging in a high-temperature environment, since the current driving speed is zero or approaching zero, only the fan is used to cool the front-end module of the vehicle. At this time, it is necessary to cool the motor, passenger compartment, battery and other areas, otherwise it will lead to the deterioration of the heat exchange conditions of the low-temperature radiator. Under such conditions, when cooling the battery and the passenger compartment through air-conditioning refrigeration, if the heat load of the condenser is too high, it will cause the temperature of the outside air entering the low-temperature radiator to rise, which will further cause the water temperature of the low-temperature circuit to exceed the limit, resulting in thermal protection of each component in the low-temperature circuit, performance degradation, and even functional failure. At the same time, the water temperature at the inlet of the On-Board Charger (OBC) rises. After exceeding the limit, it will cause the DC / DC converter to limit power, unable to meet the low-voltage power balance of the vehicle, resulting in abnormal air volume of the blower, and ultimately causing the vehicle to fail to power on after shutting down.

[0037] Figure 1 The flowchart shown is for a vehicle thermal management method provided by one or more embodiments of this specification. This method can be applied to the temperature control of a vehicle during high-power idling charging, so as to avoid power limitation of the vehicle's DC / DC converter, ensure the low-voltage power balance of the vehicle, while ensuring a suitable temperature in the passenger compartment and avoiding affecting the riding experience of passengers. Here, high-power idling charging refers to the idling charging state where the charging power is higher than a preset threshold. It can be understood that compared with low-power idling charging, although high-power idling charging is faster in charging, it is more likely to cause the temperature of related components to rise.

[0038] This process can be executed by a computing device in the relevant field (such as a vehicle computer installed in the vehicle, or a server set in the cloud, etc.). Some input parameters or intermediate results in the process allow manual intervention and adjustment to help improve accuracy.

[0039] The implementation of the analysis method involved in the embodiments of this application can be a terminal device or a server, and this application does not make special restrictions on this. For the convenience of understanding and description, the following embodiments will be described in detail with the vehicle computer as an example.

[0040] It should be noted that the server can be a single device or a system composed of multiple devices, that is, a distributed server, and this application does not make specific limitations on this.

[0041] As Figure 1 shown, the embodiments of this application provide a vehicle thermal management method, which is applied to the vehicle structure as Figure 2 shown, and the vehicle thermal management method includes:

[0042] S101: Determine that the engine of the target vehicle is in an idling state and the engine is charging the battery pack at high power.

[0043] First, determine whether the target vehicle meets the thermal management conditions for high-power idle charging. When judging whether the target vehicle meets the thermal management conditions for high-power idle charging, the vehicle-mounted computer needs to obtain the engine status, high-power idle charging mode status, air-conditioning status, and ambient temperature of the target vehicle. And only when the engine status of the target vehicle is in the start state, the high-power idle charging mode is in the on state, and the air-conditioning status is in the on state, it is considered that the target vehicle meets the thermal management conditions for high-power idle charging, and the following vehicle thermal management method is used, where high power refers to the charging power higher than the preset threshold.

[0044] In addition to the above steps of judging whether the target vehicle meets the thermal management conditions for high-power idle charging simultaneously, it is also possible to judge step by step whether the target vehicle meets the thermal management conditions for high-power idle charging and take into account the ambient temperature factor. As Figure 3 shown, after the vehicle engine starts, the controller monitors the vehicle driving status. If the vehicle does not turn on the high-power idle charging mode or does not turn on air-conditioning cooling, the following vehicle thermal management method is not used. If the vehicle turns on the high-power idle charging mode and simultaneously turns on air-conditioning cooling, the next judgment process is carried out. At this time, the controller judges whether the ambient temperature is not lower than 30°C. If the ambient temperature is lower than 30°C, the following vehicle thermal management method is not executed; if the ambient temperature is not lower than 30°C, the following vehicle thermal management method is executed. It should be noted that since a vehicle thermal management method provided in this application is particularly applicable to the case of relatively high ambient temperature, the ambient temperature being higher than the preset temperature threshold and the air-conditioning being turned on both belong to extreme cases. When the ambient temperature is lower than the preset temperature threshold or the air-conditioning is not turned on, the air-conditioning control method provided in this application can also be used.

[0045] S102: Obtain the remaining battery pack power and relevant temperature information.

[0046] If it has been determined to execute the vehicle thermal management method, at this time the controller obtains the remaining power of the battery pack and relevant temperature information. The relevant temperature information here includes temperature information such as the battery pack body temperature, the battery pack inlet water temperature, and the battery pack control module water temperature. Among them, the battery pack control module water temperature is the inlet water temperature of the on-vehicle charger and the DC / DC converter, which can be the higher temperature of the on-vehicle charger inlet water temperature and the DC / DC converter inlet water temperature, or the average value of the two.

[0047] S103: Determine that the remaining battery pack power and relevant temperature information meet the temperature adjustment conditions.

[0048] After knowing the remaining battery power of the battery pack and the relevant temperature information, when the remaining battery power of the battery pack is too low or the temperature of the relevant components is too high, it is considered that the temperature adjustment condition is met at this time, and the temperature of the relevant components needs to be actively adjusted to prevent the temperature of areas such as the motor, passenger compartment, and battery from being too high, resulting in the failure of the functions of the components in the low-temperature circuit and the power limit of the vehicle DC / DC converter, thus unable to meet the vehicle low-voltage power balance. It should be noted that there can be multiple temperature adjustment conditions here, and the corresponding threshold values can be set by the staff themselves.

[0049] S104: Based on the temperature adjustment condition, determine the corresponding temperature adjustment action.

[0050] When the known relevant temperature information and the remaining power reach the temperature adjustment condition, the corresponding temperature adjustment action can be determined according to the type of temperature adjustment condition and the current remaining battery power and relevant temperature information of the battery pack.

[0051] In one embodiment, the temperature adjustment action includes adjusting the valve body opening of the refrigerant valve body on the battery side ( Figure 2 the three-way solenoid valve B inside), the coolant valve body of the low-temperature radiator ( Figure 2 the three-way solenoid valve A inside), controlling the start and stop of the heater core water pump, and adjusting at least one of the blower speeds. When implementing the temperature adjustment action, the valve body opening of a single valve body can be adjusted only, or the valve body openings of multiple valve bodies can be adjusted simultaneously, and the start and stop of the heater core water pump can be controlled simultaneously.

[0052] By implementing the temperature adjustment action on the preset components, the temperature of the battery pack body and the water temperature of the battery pack control module are controlled within the preset temperature range. At the same time, the increase in the temperature of the passenger compartment caused by the temperature adjustment action should also be avoided to prevent affecting the passenger experience. For example, the preset temperature range corresponding to the temperature of the battery pack body can be 50°C, and the preset temperature range corresponding to the water temperature of the battery pack control module can be 60°C.

[0053] This application monitors the temperatures of the key components and the battery power of the battery pack in the target vehicle performing high-power idle charging to determine whether temperature adjustment is required, and determines the corresponding temperature adjustment action based on different battery powers and component temperatures, so as to timely adjust the temperature of the battery pack and the water temperature of the battery pack control module, and timely cool and dissipate heat in areas such as the motor, passenger compartment, and battery. Avoid power limit of the vehicle DC / DC converter and ensure that the target vehicle can also maintain low-voltage power balance during high-power idle charging.

[0054] In one embodiment, such as Figure 4As shown, when the remaining power of the battery pack is low, the battery pack needs to be quickly charged. To prevent the temperature of the battery pack and the water temperature of the battery pack control module from being too high during rapid charging, temperature adjustment conditions need to be set, which are called the first temperature adjustment conditions. The first temperature adjustment conditions at this time can be that on the premise that the remaining power of the battery pack is lower than the preset power threshold, the first temperature difference between the battery pack body temperature and the inlet water temperature of the battery pack is higher than the first preset temperature or the battery pack body temperature is higher than the second preset temperature. Among them, only when the battery pack body temperature is higher than the inlet water temperature of the battery pack, the first temperature difference is calculated, that is, the first temperature difference is not negative. The first preset temperature can be set to 30°C, the second preset temperature can be set to 50°C, and the preset power threshold can be set to 20%.

[0055] The above first temperature adjustment conditions are described here: when the remaining power of the battery pack is low, the battery pack can be quickly charged through the high-power idle charging mode at this time, but the temperature of the battery pack needs to be controlled within the preset temperature range. At this time, in addition to directly monitoring the battery pack body temperature, the first temperature difference between the battery pack body temperature and the inlet water temperature of the battery pack can also be monitored. If the first temperature difference is small, such as lower than the first preset temperature, it means that the inlet water temperature of the battery pack is close to the battery pack body temperature, which may lead to insufficient heat exchange efficiency. According to the heat conduction principle, the smaller the temperature difference from the battery pack body, the lower the heat exchange efficiency, which will cause the battery pack to be unable to effectively dissipate heat under high-temperature conditions, and the battery temperature will continue to rise, affecting the battery performance and life.

[0056] Furthermore, after determining that the current remaining power of the battery pack and the relevant temperature information meet the first temperature adjustment conditions, when determining the corresponding temperature adjustment actions, the second temperature difference between the battery pack body temperature and the second preset temperature can be determined. Then, based on the second temperature difference and the first preset calibration coefficient, the first valve opening adjustment amount of the refrigerant valve body on the battery side can be determined; then, based on the first valve opening adjustment amount, the valve opening of the refrigerant valve body on the battery side is adjusted. Only when the battery pack body temperature is higher than the second preset temperature, the second temperature difference is calculated, that is, the second temperature difference is not negative, and the same applies to other temperature differences below.

[0057] Exemplarily, after determining the second temperature difference, the first valve opening adjustment amount can be set to be proportional to the second temperature difference. At this time, the first valve opening adjustment amount can be determined by the following formula:

[0058] D1 = 10% * a1 * (T′ - T 2 )

[0059] where D1 is the first valve opening adjustment amount; a1 is the first preset calibration coefficient, T′ is the battery pack temperature, T 2is the second preset temperature, which can be set to 50°C. The magnitude of the first preset calibration coefficient can be a fixed value or related to the magnitude of the second temperature difference (i.e., T′ - T 2 ), that is, the larger the value of T′ - T 2 , the larger the value of a1, which is not limited here.

[0060] In one embodiment, as Figure 5 shown, when the remaining power of the battery pack is relatively sufficient, there is no need to perform rapid charging on the battery pack at this time. In addition to considering the temperature of the battery pack itself, it is also necessary to consider the water temperature of the battery pack control module. It can be understood that if the temperature of the battery pack itself is too high, or the water temperature of the battery pack control module is too high, it will affect the low-voltage power balance of the target vehicle. Therefore, the second temperature adjustment condition at this time can be set as follows: when it is determined that the remaining power of the battery pack is higher than the preset power threshold, if the temperature of the battery pack itself is higher than the second preset temperature, or the water temperature of the battery pack control module is higher than the third preset temperature, then the relevant temperature information meets the second temperature adjustment condition. The above second preset temperature can be set to 50°C, and the third preset temperature can be set to 65°C.

[0061] As Figure 6 shown, after determining the second temperature adjustment condition, it is also necessary to perform subdivision according to the relevant temperature information, that is, the situation where the temperature of the battery pack itself is higher than the second preset temperature and the water temperature of the battery pack control module is not higher than the third preset temperature, and the situation where the water temperature of the battery pack control module is higher than the third preset temperature. For the second situation, at this time, the temperature of the battery pack itself can be higher than the second preset temperature or not higher than the second preset temperature.

[0062] The temperature adjustment actions corresponding to the first situation are described below: If it is determined that the relevant temperature information meets the second temperature adjustment condition, and the temperature of the battery pack itself is higher than the second preset temperature, and the water temperature of the battery pack control module is not higher than the third preset temperature, then determine the second temperature difference between the temperature of the battery pack itself and the second preset temperature; and based on the second temperature difference and the second preset calibration coefficient, determine the first valve opening adjustment amount of the refrigerant valve body on the battery side, and then based on the first valve opening adjustment amount, adjust the valve opening of the refrigerant valve body on the battery side, that is, increase the corresponding first valve opening adjustment amount. It should be noted that since the temperature difference here is still the temperature difference between the temperature of the battery pack itself and the second preset temperature, therefore, the name of the second temperature difference is still used. Similarly, since the corresponding valve body is still the refrigerant valve body on the battery side, the first valve opening adjustment amount is still used for description. Among them, after determining the second temperature difference, the process of determining the first valve opening adjustment amount is the same as the method for obtaining D1 described above, and will not be elaborated here.

[0063] The temperature adjustment operation corresponding to the second case is described below: If it is determined that the relevant temperature information meets the second temperature adjustment condition and the water temperature of the battery pack control module is higher than the third preset temperature, then determine the second temperature difference between the temperature of the battery pack body and the second preset temperature, and the third temperature difference between the water temperature of the battery pack control module and the third preset temperature. Based on the second temperature difference, the third temperature difference, the third preset calibration coefficient, and the fourth preset calibration coefficient, determine the first valve opening adjustment amount of the refrigerant valve body on the battery side and the second valve opening adjustment amount of the coolant valve body of the low-temperature radiator. And at the same time, based on the first valve opening adjustment amount and the second valve opening adjustment amount, adjust the valve opening of the corresponding valve body, and control the warm air core body water pump to start.

[0064] The above temperature adjustment operation is described here: When the water temperature of the battery pack control module is relatively high, the heat generation of the components is relatively serious at this time, and temperature adjustment measures need to be taken immediately. Therefore, in addition to adjusting the valve opening of the refrigerant valve body on the battery side, it is also necessary to adjust the valve opening of the coolant valve body of the low-temperature radiator. When determining the second valve opening adjustment amount of the coolant valve body of the low-temperature radiator, it is necessary to confirm the third temperature difference between the water temperature of the battery pack control module and the third preset temperature. It can be understood that the larger the third temperature difference, the larger the corresponding second valve opening adjustment amount of the coolant valve body of the low-temperature radiator.

[0065] Similarly, after determining the third temperature difference, the second valve opening adjustment amount can be set to be proportional to the third temperature difference. At this time, the second valve opening adjustment amount can be determined by the following formula:

[0066] D2 = 10% * a4 * (T ‘’ - T 3 )

[0067] Wherein, D2 is the second valve opening adjustment amount; a4 is the fourth preset calibration coefficient, T ‘’ is the water temperature of the battery pack control module, T 3 is the third preset temperature, which can be set to 65 °C. The magnitude of the fourth preset calibration coefficient can be a fixed value or related to the magnitude of the second temperature difference (i.e., T ‘’ - T 3 ). That is, the larger the value of T ‘’ - T 3 , the larger the value of a4, which is not limited here.

[0068] Such as Figure 2As shown, after increasing the valve opening of the coolant valve body of the low-temperature radiator to cool the water temperature of the battery pack control module, the temperature of the coolant flowing out of the low-temperature radiator will increase. Since the coolant flowing out of the low-temperature radiator will flow through the battery chiller and the plate heat exchanger, causing the temperature of the battery chiller to rise, at this time, the low temperature of the passenger compartment can be used to cool the battery side. Specifically, the controller can be used to control the opening of the warm air core body water pump, so that the coolant circulates between the warm air core body and the plate heat exchanger, so that heat exchange occurs between the plate heat exchanger on the warm air core body side and the plate heat exchanger on the battery side, so as to reduce the temperature of the coolant flowing through the plate heat exchanger on the battery side plate, thereby reducing the temperature of the coolant on the battery side. However, after the warm air core body is turned on, the temperature of the coolant flowing through the warm air core body will rise. At this time, by increasing the blower gear, the heat of the warm air core body and the cold air of the evaporator are mixed in the heating, ventilation and air conditioning system (Heating, Ventilation, and Air Conditioning, HVAC), and the air volume is increased by increasing the blower air volume and then blown into the passenger compartment. Although the air temperature rises, it will affect the passenger's perception of temperature comfort, but it can meet the basic needs of the passenger for in-vehicle refrigeration.

[0069] If the valve opening of the battery side valve body is continuously increased blindly, the temperature inside the vehicle will rise significantly. Even if the blower air volume is increased further, the refrigeration demand of the passengers inside the vehicle cannot be met. By turning on the warm air core body water pump and increasing the blower gear for air mixing, the plate heat exchanger on the battery side and the battery chiller can synchronously cool the battery pack and the coolant of the low-temperature radiator, so as to achieve the purpose of reducing the temperature of the battery pack body and the water temperature of the battery pack control module.

[0070] In one embodiment, when increasing the blower air volume, the corresponding blower air volume can be determined based on the valve opening of the coolant valve body of the low-temperature radiator. Specifically, if the valve opening of the coolant valve body of the low-temperature radiator is larger, it proves that after the warm air core body water pump is turned on at this time, more high-temperature coolant flows through the battery chiller, and at this time, more heat needs to be taken away by the warm air core body. This will cause the air temperature blown out by the air conditioner to rise when the cold air volume of the evaporator is certain. Therefore, when the air temperature does not rise to a certain temperature, the blower air volume can be increased to try to meet the air-conditioning refrigeration demand of the passengers. Among them, the relationship between the blower air volume and the valve opening of the coolant valve body of the low-temperature radiator can be measured in advance according to the driver's driving experience and stored in a two-dimensional table. When the blower air volume needs to be increased, the corresponding blower air volume can be determined by querying the current valve opening of the coolant valve body of the low-temperature radiator.

[0071] In one embodiment, as Figure 7As shown, when the warm air core body water pump is in the open state, it is still necessary to monitor the temperature of the battery pack body and the water temperature of the battery pack control module. And if the temperature of the battery pack body and the water temperature of the battery pack control module are relatively high at this time, it is necessary to increase the adjustment efficiency of the temperature adjustment action. Therefore, the temperature adjustment conditions at this time can be set as follows: when the warm air core body water pump is in the open state, if the temperature of the battery pack body is higher than the second preset temperature, or the water temperature of the battery pack control module is higher than the third preset temperature, the relevant temperature information meets the third temperature adjustment condition. Here, the second preset temperature can still be set to 50 °C, and the third preset temperature can be set to 65 °C.

[0072] Furthermore, as Figure 8 shown, after determining that the relevant temperature information meets the third temperature adjustment condition, it is also necessary to subdivide according to the relevant temperature information. At this time, there are three cases, namely the first case where the temperature of the battery pack body is not higher than the second preset temperature and the water temperature of the battery pack control module is higher than the third preset temperature, the second case where the temperature of the battery pack body is higher than the second preset temperature and the water temperature of the battery pack control module is not higher than the third preset temperature, and the third case where the temperature of the battery pack body is higher than the second preset temperature and the water temperature of the battery pack control module is higher than the third preset temperature. It can be understood that the temperature adjustment actions corresponding to different cases are different.

[0073] For the first case, at this time, the temperature of the battery pack body is not higher than the second preset temperature, and the water temperature of the battery pack control module is higher than the third preset temperature. When adjusting, the temperature can be adjusted by adjusting the valve body opening of the low-temperature radiator coolant valve body. Specifically, when determining the second valve body opening adjustment amount of the low-temperature radiator coolant valve body, it is necessary to determine the third temperature difference between the water temperature of the battery pack control module and the third preset temperature, and based on the third temperature difference and the fifth preset calibration coefficient, determine the second valve body opening adjustment amount of the low-temperature radiator coolant valve body.

[0074] For example, the second valve body opening adjustment amount here can be calculated by the following formula:

[0075] D2 = 15% * a5o(T ‘’ - T 3 )

[0076] where a5 is the fifth preset calibration coefficient. To determine the second valve body opening adjustment amount, the valve body opening of the low-temperature radiator coolant valve body can be correspondingly increased. It should be noted that the values of the above five preset calibration coefficients can be equal or not equal, and no limitation is made in this regard. At the same time, the first preset calibration coefficient, the second preset calibration coefficient, and the third preset calibration coefficient corresponding to the first valve body opening adjustment amount can be the same value, and the fourth preset calibration coefficient and the fifth preset calibration coefficient corresponding to the second valve body opening adjustment amount can be the same value.

[0077] In one embodiment, for the second case, at this time, the temperature of the battery pack body is higher than the second preset temperature, and the water temperature of the battery pack control module is not higher than the third preset temperature. When adjusting the temperature, on the basis of keeping the valve opening of the refrigerant valve body on the battery side unchanged, the valve opening of the coolant valve body of the low-temperature radiator flowing to the battery cooler side can be closed, and the warm air core body water pump can be controlled to close to cool down the temperature of the battery pack body.

[0078] In one embodiment, for the third case, the temperature of the battery pack body is higher than the second preset temperature, and the water temperature of the battery pack control module is higher than the third preset temperature. At this time, both the temperature of the battery pack and the water temperature of the battery pack control module are relatively high. At the same time, when the warm air core body water pump is turned on, if the valve opening is further increased, the temperature inside the vehicle will rise significantly, and the cooling requirement of the passengers inside the vehicle cannot be met. Therefore, at this time, it is necessary to exit the high-power idle charging mode and prompt the passengers at the same time. Specifically, after switching the target vehicle from the high-power idle charging mode to the low-power idle charging mode, the passengers are prompted that the current mode is the low-power idle charging mode, and the high-power idle charging mode needs to be turned on again after turning off the air conditioning cooling or reducing the air conditioning cooling capacity.

[0079] In one embodiment, since the above temperature adjustment actions will cause the temperature inside the passenger compartment to rise, for passengers who are more sensitive to temperature, it is easy to affect their riding experience. If the passengers choose to lower the air conditioning cooling temperature due to the increased body feeling temperature, after the vehicle-mounted computer receives the air conditioning cooling instruction from the passengers, the air conditioning cooling instruction from the passengers is preferentially executed between the air conditioning control strategy and the air conditioning cooling instruction. At this time, the air conditioning will be adjusted according to the air conditioning cooling instruction to lower the temperature of the passenger compartment, and at the same time, the target vehicle will be switched from the high-power idle charging mode to the low-power idle charging mode. And the passengers are prompted that the current mode is the low-power idle charging mode, and the high-power idle charging mode needs to be turned on again after turning off the air conditioning cooling or reducing the air conditioning cooling capacity.

[0080] It should be noted that in the above vehicle thermal management method, the remaining power of the battery pack, the temperature of the battery pack body, the water temperature at the inlet of the battery pack, and the water temperature of the battery pack control module need to be monitored at any time. And after the power information and the temperature information meet the temperature adjustment conditions, the corresponding temperature adjustment actions are executed. And after the temperature adjustment actions are executed, the power information and the temperature information are continuously monitored. If the target vehicle is switched from the high-power idle charging mode to the low-power idle charging mode, it is necessary to continuously monitor whether the passengers turn on the high-power idle charging mode. If the vehicle-mounted computer receives the instruction from the passengers to turn on the high-power idle charging mode, the power information and the temperature information are monitored again.

[0081] In one embodiment, in addition to continuously monitoring the power information and temperature information, the vehicle operating condition information and the surrounding environment information of the current target vehicle can also be collected, and based on the power information and temperature information of the current vehicle, the power information and temperature information of the target vehicle in a future time period are predicted, and whether a temperature adjustment action needs to be performed in the future time period is determined according to the prediction result. Among them, when making a prediction, the vehicle operating condition information, the surrounding environment information, the power information and temperature information corresponding to the current time period can be input into a pre-trained prediction model to output the power information and temperature information in the future time period. The data features of the vehicle operating condition information, the surrounding environment information, the power information and temperature information corresponding to the current time period can also be extracted through a neural network model, and the sample vehicle data most similar to the current situation of the target vehicle is determined in a preset database, and the sample temperature information and sample power information corresponding to the sample vehicle data in the future time period are used as the predicted values of the temperature information and power information of the target vehicle. The present application does not limit the prediction method, and the prediction interval time can be set by the staff themselves. At the same time, the above method of predicting temperature information and power information can be used as a normal data monitoring method. When it is detected that the temperature of the battery pack body or the water temperature of the battery pack control module rises suddenly, the long-term monitoring mode of temperature information and power information can be switched at this time.

[0082] The high-power idle charging mode in the present application is described here: The high power here means that the charging power is higher than the preset power threshold, but the specific charging power is related to the temperature of the battery pack. Specifically, when the temperature of the battery pack is low, the charging power is high at this time, and when the temperature of the battery pack is high, the charging power is low at this time.

[0083] In one embodiment, in order to meet the user's needs, it is known that the charging power is related to the engine speed of the target vehicle, that is, the higher the engine speed, the higher the charging power. However, the problem that follows when the engine speed is increased is the reduction of fuel efficiency, that is, the fuel consumption for charging the same amount of electricity increases. Since the engine speed and the corresponding fuel efficiency and charging power can be pre-calibrated.

[0084] When the user is performing idle charging, if there is an obvious tendency, such as relatively high fuel consumption or concern about the charging time, the magnitude of the reward coefficient within the preset reward function can be determined according to the charging tendency command sent by the user through the vehicle-mounted computer. Specifically, at this time, the vehicle-mounted computer receives the charging tendency command from the user. The types of the charging tendency command include a charging power tendency command and a fuel efficiency tendency command; based on the charging tendency command, the first reward coefficient and the second reward coefficient in the preset reward function are determined; the pre-calibrated engine speed correspondence relationship is obtained. The engine speed correspondence relationship includes a first correspondence relationship between the engine speed and the charging power, and a second correspondence relationship between the engine speed and the fuel efficiency; based on the first correspondence relationship, the second correspondence relationship, the first reward coefficient, the second reward coefficient, and the preset reward function, the target engine speed with the highest reward value is determined; the target engine speed is used as the engine speed of the target vehicle. If the charging tendency command is a charging power tendency command, the reward coefficient corresponding to the charging time can be increased at this time, and the reward coefficient corresponding to the fuel consumption can be decreased. Then, the reward values corresponding to different engine speeds are calculated to determine the reward values corresponding to each engine speed. Among them, the first correspondence relationship and the second correspondence relationship are the charging power and the fuel efficiency respectively corresponding to the same engine speed.

[0085] For example, the preset reward function can be simply expressed as:

[0086] f = at + bV

[0087] where f is the reward value corresponding to the engine speed, a is the first reward coefficient, b is the second reward coefficient, t is the charging time, and its value is related to the charging power and the remaining battery pack power; V is the fuel consumption, which is related to the fuel efficiency. It should be noted that the present application does not limit the specific setting of the reward function.

[0088] As Figure 9 shown, the embodiment of the present application also provides a vehicle thermal management device, including:

[0089] A state determination module 901 determines that the engine of the target vehicle is in an idle state and the engine is for high-power charging of the battery pack.

[0090] An information acquisition module 902 acquires the remaining battery pack power and relevant temperature information; the relevant temperature information includes the battery pack body temperature, the battery pack inlet water temperature, and the battery pack control module water temperature.

[0091] A temperature adjustment module 903 determines that the remaining battery pack power and the relevant temperature information meet the temperature adjustment conditions; based on the temperature adjustment conditions, the corresponding temperature adjustment actions are determined.

[0092] An embodiment of the present application further provides a vehicle, including: at least one processor; and a memory communicatively connected to the at least one processor; wherein, the memory stores instructions executable by the at least one processor, and when the instructions are executed by the at least one processor, the at least one processor is enabled to:

[0093] Determine that the target vehicle meets the high-power idle charging condition; obtain the remaining battery power and relevant temperature information; the relevant temperature information includes the battery pack body temperature, the battery pack inlet water temperature, and the battery pack control module water temperature; determine that the remaining battery power and the relevant temperature information meet the temperature regulation condition; based on the temperature regulation condition, determine the corresponding temperature regulation action; based on the temperature regulation action, control the battery pack body temperature and the battery pack control module water temperature within a preset temperature range.

[0094] An embodiment of the present application further provides a non-volatile computer storage medium storing computer-executable instructions, and the computer-executable instructions are configured to:

[0095] Determine that the target vehicle meets the high-power idle charging condition; obtain the remaining battery power and relevant temperature information; the relevant temperature information includes the battery pack body temperature, the battery pack inlet water temperature, and the battery pack control module water temperature; determine that the remaining battery power and the relevant temperature information meet the temperature regulation condition; based on the temperature regulation condition, determine the corresponding temperature regulation action; based on the temperature regulation action, control the battery pack body temperature and the battery pack control module water temperature within a preset temperature range.

[0096] In this embodiment, the vehicle can be divided into functional modules according to the above method example. For example, each functional module can be corresponding, or two or more functions can be integrated into one processing module, and the above integrated module can be implemented in the form of hardware. It should be noted that the division of modules in this embodiment is illustrative, only a logical function division, and there can be other division methods in actual implementation.

[0097] In the case of dividing each functional module according to each function, the vehicle may include: a state determination module, an information acquisition module, a temperature regulation module, etc. It should be noted that all relevant contents of each step involved in the above method embodiment can be cited in the function description of the corresponding functional module, and will not be repeated here.

[0098] The vehicle provided in this embodiment is used to execute the above-mentioned vehicle thermal management method, so the same effects as those of the above implementation method can be achieved. In the case of adopting an integrated unit, the vehicle may include a processing module and a storage module. Among them, the processing module can be used to control and manage the actions of the vehicle. The storage module can be used to support the vehicle to execute mutual program codes and data, etc.

[0099] Among them, the processing module can be a processor or a controller, which can implement or execute various exemplary logic blocks, modules and circuits described in combination with the disclosure of this application. The processor can also be a combination that realizes computing functions, such as including a combination of one or more microprocessors, a combination of digital signal processing (DSP) and a microprocessor, etc. The storage module can be a memory.

[0100] This embodiment also provides a computer-readable storage medium. Computer program codes are stored in the computer-readable storage medium (including but not limited to disk memories, CD-ROMs, optical memories, etc.). When the computer program codes run on a computer, the computer is enabled to execute the above-mentioned related method steps to implement a... method provided in the above embodiment.

[0101] This embodiment also provides a computer program product. When the computer program product runs on a computer, the computer is enabled to execute the above-mentioned related steps to implement a... method provided in the above embodiment. Among them, the beneficial effects of the above embodiment can be referred to the beneficial effects in the corresponding method provided above, and will not be elaborated here.

[0102] Through the description of the above embodiments, those skilled in the art can understand that, for the convenience and conciseness of description, only the above-mentioned division of each functional module is used as an example. In practical applications, the above functions can be allocated to different functional modules according to needs, that is, the internal structure of the device is divided into different functional modules to complete all or part of the functions described above.

[0103] In the embodiments provided in the present application, it should be understood that the disclosed devices and methods can be implemented in other ways. For example, the device embodiments described above are merely illustrative. For example, the division of modules or units is only a logical function division. In actual implementation, there may be other division methods. For example, multiple units or components can be combined or integrated into another device, or some features can be ignored or not executed. Another point is that the displayed or discussed coupling or direct coupling or communication connection between each other can be through some interfaces. The indirect coupling or communication connection of devices or units can be in electrical, mechanical or other forms. In the description of the present disclosure, it should be understood that if terms such as "upper", "lower", "front", "rear", "left" and "right" are used to indicate the orientation or positional relationship, it is based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the indicated position or element must have a specific orientation, be constructed and operated in a specific orientation, and thus cannot be understood as a limitation of the present disclosure.

[0104] It should be noted that in this article, relational terms such as first and second are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. It should also be noted that the term "comprising", "including" or any other variant thereof is intended to cover non-exclusive inclusion, so that a process, method, commodity or device including a series of elements not only includes those elements, but also includes other elements not explicitly listed, or further includes elements inherent to such process, method, commodity or device. Without further limitation, an element defined by the statement "including one..." does not exclude the existence of additional identical elements in the process, method, commodity or device including the element.

[0105] The above are only the embodiments of the present disclosure and are not used to limit the present disclosure. For those skilled in the art, various changes and modifications can be made to the present disclosure. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present disclosure shall be included within the scope of the claims of the present disclosure.

Claims

1. A vehicle thermal management method, characterized in that, Including: Determine that the engine of the target vehicle is in the idle state, and the engine is for high-power charging of the battery pack; Obtain the remaining power of the battery pack and relevant temperature information; The relevant temperature information includes the temperature of the battery pack body, the water temperature at the inlet of the battery pack, and the water temperature of the battery pack control module; Determine that the remaining power of the battery pack and the relevant temperature information meet the temperature adjustment conditions; Based on the temperature adjustment conditions, determine the corresponding temperature adjustment actions.

2. The method according to claim 1, characterized in that, The temperature adjustment actions include: Adjust at least one of the valve opening of the refrigerant valve body on the battery side, the valve opening of the coolant valve body of the low-temperature radiator, the start and stop of the water pump of the heater core, and the blower gear.

3. The method according to claim 1, wherein The determination that the remaining power of the battery pack and the relevant temperature information meet the temperature adjustment conditions specifically includes: Determine that the remaining power of the battery pack is lower than the preset power threshold; Determine the first temperature difference between the temperature of the battery pack body and the water temperature at the inlet of the battery pack; Determine that the temperature difference is lower than the first preset temperature, or the temperature of the battery pack body is higher than the second preset temperature; Then the relevant temperature information meets the first temperature adjustment condition.

4. The method according to claim 3, wherein The determination of the corresponding temperature adjustment actions based on the temperature adjustment conditions specifically includes: Determine that the relevant temperature information meets the first temperature adjustment condition; Determine the second temperature difference between the temperature of the battery pack body and the second preset temperature; Based on the second temperature difference and the first preset calibration coefficient, determine the first valve opening adjustment amount of the refrigerant valve body on the battery side; Based on the first valve opening adjustment amount, adjust the valve opening of the refrigerant valve body on the battery side.

5. The method according to claim 1, wherein The determination that the remaining power of the battery pack and the relevant temperature information meet the temperature adjustment conditions specifically includes: Determine that the remaining power of the battery pack is higher than the preset power threshold; Determine that the temperature of the battery pack body is higher than the second preset temperature, or the water temperature of the battery pack control module is higher than the third preset temperature; Then the relevant temperature information meets the second temperature adjustment condition.

6. The method according to claim 5, characterized in that, The determination of the corresponding temperature adjustment actions based on the temperature adjustment conditions specifically includes: Determine that the relevant temperature information meets the second temperature adjustment condition; If the temperature of the battery pack body is higher than the second preset temperature and the water temperature of the battery pack control module is not higher than the third preset temperature; Determine the second temperature difference between the temperature of the battery pack body and the second preset temperature; Based on the second temperature difference and the second preset calibration coefficient, determine the first valve opening adjustment amount of the refrigerant valve body on the battery side; Based on the first valve opening adjustment amount, adjust the valve opening of the refrigerant valve body on the battery side.

7. The method according to claim 5, characterized in that, The determination of the corresponding temperature adjustment actions based on the temperature adjustment conditions specifically includes: Determine that the relevant temperature information meets the second temperature adjustment condition; If the water temperature of the battery pack control module is higher than the third preset temperature; Determine the second temperature difference between the temperature of the battery pack body and the second preset temperature, and the third temperature difference between the water temperature of the battery pack control module and the third preset temperature; Based on the second temperature difference, the third temperature difference, the third preset calibration coefficient, and the fourth preset calibration coefficient, determine the first valve body opening adjustment amount of the refrigerant valve body on the battery side and the second valve body opening adjustment amount of the coolant valve body of the low-temperature radiator; Based on the first valve body opening adjustment amount and the second valve body opening adjustment amount, adjust the valve body opening of the corresponding valve body; Control the warm air core body water pump to turn on and increase the blower gear.

8. The method according to claim 1, characterized in that, Determine that the remaining power of the battery pack and the relevant temperature information meet the temperature adjustment conditions, specifically including: Determine that the warm air core body water pump is in the on state; Determine that the temperature of the battery pack body is higher than the second preset temperature, or the water temperature of the battery pack control module is higher than the third preset temperature; Then the relevant temperature information meets the third temperature adjustment condition.

9. The method according to claim 8, wherein Based on the temperature adjustment conditions, determine the corresponding temperature adjustment actions, specifically including: Determine that the temperature of the battery pack body is not higher than the second preset temperature, and the water temperature of the battery pack control module is higher than the third preset temperature; Determine the third temperature difference between the water temperature of the battery pack control module and the third preset temperature; Based on the third temperature difference and the fifth preset calibration coefficient, determine the second valve body opening adjustment amount of the coolant valve body of the low-temperature radiator; Based on the second valve body opening adjustment amount, adjust the valve body opening of the coolant valve body of the low-temperature radiator.

10. The method according to claim 8, wherein Based on the temperature adjustment conditions, determine the corresponding temperature adjustment actions, specifically including: Determine that the temperature of the battery pack body is higher than the second preset temperature, and the water temperature of the battery pack control module is not higher than the third preset temperature; Control the valve body opening of the refrigerant valve body on the battery side to remain unchanged, close the valve body opening of the coolant valve body of the low-temperature radiator flowing to the battery cooler side, and control the warm air core body water pump to turn off.

11. The method according to claim 8, wherein Based on the temperature adjustment conditions, determine the corresponding temperature adjustment actions, specifically including: If the temperature of the battery pack body is higher than the second preset temperature, and the water temperature of the battery pack control module is higher than the third preset temperature; Switch the target vehicle from the high-power idle charging mode to the low-power idle charging mode.

12. The method according to claim 1, wherein After obtaining the remaining power of the battery pack and the relevant temperature information, the method further includes: Receive a charging tendency instruction from the user, and the types of the charging tendency instruction include a charging power tendency instruction and a fuel efficiency tendency instruction; Based on the charging tendency instruction, determine the first reward coefficient and the second reward coefficient in the preset reward function; Obtain the pre-calibrated engine speed correspondence, which includes the first correspondence between the engine speed and the charging power, and the second correspondence between the engine speed and the fuel efficiency; Based on the first correspondence, the second correspondence, the first reward coefficient, the second reward coefficient, and the preset reward function, determine the target engine speed with the highest reward value; Use the target engine speed as the engine speed of the target vehicle.

13. A vehicle thermal management device, characterized in that, Include: A state determination module determines that the engine of the target vehicle is in the idle state, and the engine is for high-power charging of the battery pack; An information acquisition module that obtains the remaining battery power of the battery pack and relevant temperature information; the relevant temperature information includes the temperature of the battery pack body, the water temperature at the inlet of the battery pack, and the water temperature of the battery pack control module; A temperature adjustment module that determines that the remaining battery power of the battery pack and the relevant temperature information meet the temperature adjustment conditions; based on the temperature adjustment conditions, determines the corresponding temperature adjustment actions.

14. A vehicle, characterized in that, The vehicle includes: A memory for storing executable program code; A processor for calling and running the executable program code from the memory, so that the vehicle executes the steps of the method according to any one of claims 1 to 12.

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