Thermal management method, device, equipment and storage medium for battery water pump failure

Abstract

This application discloses a thermal management method, device, equipment, and storage medium for battery water pump failure, relating to the technical field of electric vehicles. The method includes: obtaining the target operating temperature, battery temperature, battery safety temperature, and battery inlet water temperature of target components when the battery water pump fails; obtaining a target heating temperature based on the target operating temperature, battery temperature, and battery safety temperature; controlling the vehicle circuit water temperature for heating based on the target heating temperature, and cooling based on the battery inlet water temperature and battery temperature. This method solves the problem of how to thermally manage the battery when the battery water pump fails, ensures the battery's operating performance, and improves the user experience.

Description

Technical Field

[0001] The present application relates to the technical field of electric vehicles, and in particular to a thermal management method, device, equipment and storage medium for battery water pump failure. Background Art

[0002] In modern automotive technology, especially in the electric vehicle sector, vehicle performance is closely tied to the state of the battery system. Electric vehicles typically utilize battery packs as their power source, and the performance of these battery packs in low-temperature environments is particularly critical. However, existing electric vehicle systems generally face a technical challenge in their design: if the battery water pump fails, the batteries cannot be effectively heated during driving in low-temperature conditions, resulting in a significant decrease in discharge capacity, which in turn severely impacts the vehicle's power output and the user's driving experience. Furthermore, within the vehicle system, the vehicle water pump is responsible for controlling the vehicle's water circulation, which primarily dissipates heat from high-voltage components. Under normal circumstances, the heating systems for the vehicle and battery circuits are independent, operating in series or parallel through valve control. However, when the battery water pump fails, existing systems often fail to adjust this relationship in a timely manner, severely limiting the vehicle's power output in low temperatures.

[0003] Therefore, how to perform thermal management on the battery when the battery water pump fails is a problem that needs to be solved urgently. Summary of the Invention

[0004] The main purpose of this application is to provide a thermal management method, device, equipment and storage medium for battery water pump failure, aiming to solve the technical problem of how to perform thermal management of the battery when the battery water pump fails.

[0005] To achieve the above objectives, the present application proposes a thermal management method for battery water pump failure, the method comprising:

[0006] When the battery water pump fails, obtain the target operating temperature of the target component, battery temperature, battery safety temperature, and battery inlet water temperature;

[0007] Obtaining a target heating temperature according to the target operating temperature, the battery temperature, and the battery safety temperature;

[0008] The vehicle circuit water temperature is controlled to be heated according to the target heating temperature, and the vehicle circuit water temperature is controlled to be cooled based on the battery inlet water temperature and the battery temperature.

[0009] In one embodiment, the step of obtaining a target heating temperature according to the target operating temperature, the battery temperature, and the battery safety temperature includes:

[0010] Obtaining a first target water temperature range according to the target operating temperature;

[0011] obtaining a second target water temperature range according to the battery temperature;

[0012] obtaining a third target water temperature range according to the battery safety temperature;

[0013] A target heating temperature is obtained according to the first target water temperature range, the second target water temperature range, and the third target water temperature range.

[0014] In one embodiment, the step of cooling based on the battery inlet water temperature and the battery temperature includes:

[0015] determining a first control strategy and a second control strategy based on the battery inlet water temperature and the battery temperature;

[0016] Cooling is activated or deactivated according to the first control strategy and the second control strategy.

[0017] In one embodiment, the step of determining the first control strategy and the second control strategy based on the battery inlet water temperature and the battery temperature includes:

[0018] Obtaining an inlet water temperature threshold, an inlet water cooling temperature, a battery temperature threshold, and a battery cooling temperature;

[0019] determining a first control strategy according to the battery inlet water temperature, the inlet water temperature threshold, and the inlet water cooling temperature;

[0020] A second control strategy is determined according to the battery temperature, the battery temperature threshold, and the battery cooling temperature.

[0021] In one embodiment, the step of starting or stopping cooling according to the first control strategy and the second control strategy includes:

[0022] When the first control strategy or the second control strategy meets the cooling start condition, starting the cooling function;

[0023] When both the first control strategy and the second control strategy meet the conditions for turning off cooling, the cooling function is turned off.

[0024] In one embodiment, when the battery water pump fails, after obtaining the target operating temperature of the target component, the battery temperature, the battery safety temperature, and the battery inlet water temperature, the method further includes:

[0025] During battery charging, determining whether the battery temperature is lower than a preset battery low temperature threshold;

[0026] When the battery temperature is lower than a preset battery low temperature threshold, heating is turned on, and the vehicle circuit water temperature is controlled to heat according to a preset target charging temperature.

[0027] In one embodiment, before obtaining the target operating temperature of the target component, the battery temperature, the battery safety temperature, and the battery inlet water temperature, the method further includes:

[0028] Switch the vehicle circuit and the battery circuit from parallel to series connection.

[0029] In addition, to achieve the above objectives, the present application also proposes a thermal management device for battery water pump failure, the device comprising:

[0030] The temperature acquisition module is used to obtain the target operating temperature of the target components, the battery temperature, the battery safety temperature, and the battery inlet water temperature when the battery water pump fails;

[0031] a data processing module, configured to obtain a target heating temperature according to the target operating temperature, the battery temperature, and the battery safety temperature;

[0032] The temperature control module is used to control the vehicle circuit water temperature for heating according to the target heating temperature, and to cool based on the battery inlet water temperature and the battery temperature.

[0033] In addition, to achieve the above-mentioned purpose, the present application also proposes a thermal management device for battery water pump failure, which includes: a memory, a processor, and a computer program stored on the memory and executable on the processor, wherein the computer program is configured to implement the steps of the thermal management method for battery water pump failure as described above.

[0034] In addition, to achieve the above-mentioned purpose, the present application also proposes a storage medium, which is a computer-readable storage medium. A computer program is stored on the storage medium. When the computer program is executed by the processor, the steps of the thermal management method for battery water pump failure as described above are implemented.

[0035] In addition, to achieve the above-mentioned purpose, the present application also provides a computer program product, which includes a computer program. When the computer program is executed by a processor, it implements the steps of the thermal management method for battery water pump failure as described above.

[0036] The present application provides a thermal management method for battery water pump failure, the method of the present application comprising: obtaining the target operating temperature, battery temperature, battery safety temperature and battery inlet water temperature of the target component when the battery water pump fails; obtaining the target heating temperature according to the target operating temperature, the battery temperature and the battery safety temperature; controlling the vehicle circuit water temperature for heating according to the target heating temperature, and cooling based on the battery inlet water temperature and the battery temperature. In summary, the present application ensures that the battery is effectively heated and cooled under different operating conditions by adjusting the operating mode of the vehicle circuit and the battery circuit when the battery water pump fails, thereby solving the problem of how to thermally manage the battery when the battery water pump fails, ensuring the working performance of the battery, and improving the user experience. BRIEF DESCRIPTION OF THE DRAWINGS

[0037] The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the present application and, together with the description, serve to explain the principles of the present application.

[0038] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, for ordinary technicians in this field, other drawings can be obtained based on these drawings without any creative work.

[0039] Figure 1 A flow chart illustrating a first embodiment of a thermal management method for a battery water pump failure according to the present application;

[0040] Figure 2 This is a structural diagram of an embodiment of a thermal management method for battery water pump failure in this application;

[0041] Figure 3 A flow chart illustrating a second embodiment of the thermal management method for battery water pump failure provided in this application;

[0042] Figure 4 A flow chart illustrating a third embodiment of the thermal management method for battery water pump failure provided in this application;

[0043] Figure 5 This is a schematic diagram of the module structure of the thermal management device for battery water pump failure according to an embodiment of the present application;

[0044] Figure 6 This is a schematic diagram of the device structure of the hardware operating environment involved in the thermal management method for battery water pump failure in an embodiment of the present application.

[0045] Description of Figure Numbers:

[0046] Air conditioning circuit 10; heat exchanger 101; heat exchanger 102; air conditioning system 103;

[0047] Battery circuit 20; water pump 201; battery 202; four-way valve 203;

[0048] Vehicle circuit 30; water pump 301; MCU 302; DCDC 303; OBC 304.

[0049] The purpose, features and advantages of this application will be further explained in conjunction with the embodiments and with reference to the accompanying drawings. DETAILED DESCRIPTION

[0050] It should be understood that the specific embodiments described herein are merely used to explain the technical solutions of the present application and are not intended to limit the present application.

[0051] In order to better understand the technical solution of the present application, a detailed description will be given below in conjunction with the accompanying drawings and specific implementation methods.

[0052] The main solution of the embodiment of the present application is: when the battery water pump fails, the target operating temperature, battery temperature, battery safety temperature and battery inlet water temperature of the target component are obtained; the target heating temperature is obtained according to the target operating temperature, the battery temperature and the battery safety temperature; the vehicle circuit water temperature is controlled to heat according to the target heating temperature, and cooling is performed based on the battery inlet water temperature and the battery temperature.

[0053] In modern automotive technology, especially in the electric vehicle sector, vehicle performance is closely tied to the state of the battery system. Electric vehicles typically utilize battery packs as their power source, and the performance of these battery packs in low-temperature environments is particularly critical. However, existing electric vehicle systems generally face a technical challenge in their design: if the battery water pump fails, the batteries cannot be effectively heated during driving in low-temperature conditions, resulting in a significant decrease in discharge capacity, which in turn severely impacts the vehicle's power output and the user's driving experience. Furthermore, within the vehicle system, the vehicle water pump is responsible for controlling the vehicle's water circulation, which primarily dissipates heat from high-voltage components. Normally, the heating systems for the vehicle and battery circuits are independent, operating in series or parallel through valve control. However, when the battery water pump fails, existing systems often fail to adjust this relationship in a timely manner, severely limiting the vehicle's power output in low temperatures. Therefore, how to manage battery thermal management in the event of a battery water pump failure is a pressing issue.

[0054] This application adjusts the working mode of the entire vehicle circuit and the battery circuit when the battery water pump fails, ensuring that the battery is effectively heated and cooled under different working conditions. It solves the problem of how to thermally manage the battery when the battery water pump fails, ensures the battery's working performance, and improves the user experience.

[0055] It should be noted that the execution entity of this embodiment can be a thermal management system for a battery water pump failure, a computing service device with data processing, network communication, and program execution functions, or an electronic device capable of implementing the thermal management function for a battery water pump failure, etc. This embodiment is not specifically limited to this. The following uses the thermal management system for a battery water pump failure as an example to illustrate this embodiment and the following embodiments.

[0056] Based on this, the embodiment of the present application provides a thermal management method for battery water pump failure, referring to Figure 1 and Figure 2 , Figure 1 This is a flow chart of the first embodiment of the thermal management method for battery water pump failure in this application. Figure 2 This is a structural diagram of an embodiment of a thermal management method for battery water pump failure in this application.

[0057] It should be noted that if Figure 2 The air-conditioning circuit 10 of the present embodiment shown mainly includes a compressor, an evaporator, a radiator, a pipeline, an expansion valve, a liquid storage desiccant, etc. The heat exchange medium used in the vehicle air-conditioning system is a refrigerant, and its characteristics are different from those of the coolant. Therefore, it cannot be directly connected to the coolant of the battery circuit 20 and the vehicle circuit 30, and the vehicle circuit heat exchange is only carried out through the heat exchanger 101 and the vehicle circuit 30, and the heat exchanger 102 and the battery circuit 20; the vehicle circuit 30, the vehicle circuit 30 belongs to the vehicle large cycle, and its main function is to provide a heat exchange channel for high-voltage electrical appliances. The heat exchange medium is coolant, and the coolant is mainly composed of water: ethylene glycol = 1:1 (volume ratio). The coolant driving force of the vehicle circuit 30 comes from the vehicle water pump 301. When the heat load of the vehicle is not high, the heat can be dissipated through the radiator in the front cabin of the vehicle. When the heat load of the vehicle is high, the heat can be dissipated through the radiator in the front cabin of the vehicle. When the temperature is high, the air-conditioning system 103 can be used for cooling, and then the water temperature of the vehicle circuit 30 can be lowered through the heat exchanger 101 to reduce the temperature of the high-voltage components (302-304); the battery circuit 20, the battery circuit 20 is composed of a battery water pump 201, a battery 202, a four-way valve 203 and a heat exchanger 102. When the temperature of the battery 202 is high, the water pump 201 works to drive the coolant circulation of the battery circuit 20 to cool the battery 202. Since the battery 202 is sensitive to temperature, the battery 202 is generally not connected in series with the vehicle circuit 30 when cooling, and the battery circuit 20 has no other accessories to directly dissipate heat. Therefore, heat exchange with the air-conditioning system is required through the heat exchanger 102. The cooling medium of the battery circuit 20 is coolant, which is the same product as the coolant of the vehicle circuit 30.

[0058] In this embodiment, the thermal management method for battery water pump failure includes steps S10 to S30:

[0059] Step S10: When the battery water pump fails, the target operating temperature of the target component, the battery temperature, the battery safety temperature, and the battery inlet water temperature are obtained.

[0060] It is understandable that in the event of a battery water pump failure, the system will first obtain the operating status parameters of key components in the current system for subsequent thermal management control.

[0061] It should be noted that the battery safety temperature refers to the maximum allowable battery temperature (i.e., safety temperature) set based on the battery type, specifications, and safety standards. Exceeding this temperature may lead to decreased battery performance, shortened battery life, and even safety risks. The battery inlet water temperature refers to the temperature of the cooling water entering the battery circuit water inlet (i.e., battery inlet water temperature), which is monitored.

[0062] In addition, it should be noted that the target operating temperature of the target component refers to the temperature at which the high-voltage component operates at optimal performance. Specifically, the system will obtain pre-stored data to determine the most suitable temperature for high-voltage components, such as MCU (MicroControl Unit), DCDC (DC-DC Converter), OBC (On-Board Charger), etc., under normal working conditions. This temperature range is usually determined based on the performance test data of the component to ensure that the component operates at optimal efficiency.

[0063] In a feasible implementation manner, before step S10, the method further includes:

[0064] Step S01: Switch the vehicle circuit and the battery circuit from a parallel state to a series state.

[0065] It should be noted that in this step, when the current system detects that the battery water pump has failed, the VCU (Vehicle Control Unit) will immediately perform a switching action, controlling the working state of the four-way valve to change the connection between the vehicle circuit and the battery circuit from parallel to series. Specifically, port 3 of the four-way valve is connected to port 2, and port 4 is connected to port 1, thus forming a series coolant circulation path.

[0066] It can be understood that by switching the vehicle circuit and the battery circuit from parallel to series working state, the coolant circulation capacity of the vehicle circuit is utilized to continue to provide the necessary heating and cooling functions for the battery in the event of failure of the battery water pump.

[0067] Additionally, it should be noted that a four-way valve is a valve with four ports that can switch between different fluid paths by changing the connection method of its internal channels. In this embodiment, the four-way valve is used to control the connection status between the vehicle circuit and the battery circuit. The vehicle water pump is the main driving force of the vehicle cooling system, responsible for driving the coolant to circulate in the vehicle circuit and provide the necessary heat dissipation for high-voltage components.

[0068] In a feasible implementation manner, after step S10, the method further includes:

[0069] Step A10: During the battery charging process, determine whether the battery temperature is lower than a preset battery low temperature threshold.

[0070] It should be noted that the preset battery low-temperature threshold is a fixed value set based on battery characteristics and charging requirements, and is used to determine whether the battery needs to be heated. The selection of this value requires comprehensive consideration of the battery's material properties, charging efficiency, safety, and the thermal management capabilities of the entire vehicle system.

[0071] In addition, it should be noted that in this step, when the battery water pump fails and the battery is in a charging state, the system will determine whether the battery needs to be heated. Specifically, the system will compare the real-time battery temperature with the preset battery low temperature threshold (such as -20°C). If the battery temperature is less than or equal to -20°C, it means that the battery is currently in an extremely low temperature state, and the charging efficiency and battery performance will be seriously affected. At this time, the system needs to take corresponding measures to heat the battery. If the battery temperature is greater than -20°C, it means that the battery is not currently in an extremely low temperature state and there is no need to heat the battery for the time being.

[0072] Step A20: When the battery temperature is lower than a preset battery low temperature threshold, heating is turned on, and the vehicle circuit water temperature is controlled according to a preset target charging temperature for heating.

[0073] It should be noted that the preset target charging temperature is set based on the battery's optimal charging performance. In practice, this value will be adjusted based on the specific battery type and charging strategy. Meanwhile, the vehicle circuit water temperature refers to the temperature of the coolant in the vehicle circuit. By controlling this temperature, we can ensure effective battery heating while minimizing impacts on the vehicle's overall system.

[0074] Additionally, it's important to note that when the system determines that battery heating is necessary, it determines an appropriate water temperature range based on the pre-set target charging temperature (e.g., 25°C) and the battery's safe heating requirements. It then controls the vehicle's circuit water temperature based on this temperature target, ensuring effective battery heating without causing overheating damage to high-voltage components.

[0075] Step S20: Obtaining a target heating temperature according to the target operating temperature, the battery temperature, and the battery safety temperature.

[0076] It should be noted that the target heating temperature is the heating target value set by the system to restore battery performance. It is used to control the temperature of the water during heating and needs to be determined based on the above multiple factors.

[0077] In addition, it should be noted that in this step, the system will analyze the relationship between the battery temperature and the target operating temperature (i.e., suitable temperature) of the high-voltage components. If the battery temperature is much lower than the target operating temperature of the high-voltage components, the system needs to increase the water temperature to achieve heating of the battery, while enabling the high-voltage components to operate at the target operating temperature. And when setting the target heating temperature, it must be ensured that the safe temperature of the battery will not be exceeded to prevent the battery from overheating. Therefore, the system will comprehensively consider the battery temperature, the suitable temperature of the high-voltage components, and the battery safety temperature to calculate a target heating temperature that can quickly restore the battery performance so that the high-voltage components can operate at the target operating temperature, while ensuring the safety of the battery.

[0078] Step S30: controlling the vehicle circuit water temperature for heating according to the target heating temperature, and cooling based on the battery inlet water temperature and the battery temperature.

[0079] It should be noted that in this step, after determining the target heating temperature, the system will control the vehicle circuit water temperature for heating according to the target heating temperature and adjust the cooling strategy as needed. Specifically, the system will gradually increase the vehicle circuit water temperature to the target heating temperature by adjusting the speed of the vehicle circuit water pump or increasing the power of the heating element, so that the cooling water flowing through the battery provides the necessary heat for the battery to help the battery heat up. In addition, it should be noted that the system will continuously monitor the battery inlet water temperature and battery temperature, and activate the cooling strategy when the battery inlet water temperature or battery temperature exceeds a certain threshold, such as turning on the air conditioning cooling system, to reduce the water temperature and protect the battery and high-voltage components.

[0080] This embodiment provides a thermal management method for battery water pump failure. The method includes: obtaining the target operating temperature, battery temperature, battery safety temperature, and battery inlet water temperature of the target component when the battery water pump fails; obtaining the target heating temperature based on the target operating temperature, battery temperature, and battery safety temperature; controlling the vehicle circuit water temperature for heating based on the target heating temperature, and cooling based on the battery inlet water temperature and the battery temperature. In summary, this embodiment ensures that the battery is effectively heated and cooled under different operating conditions by adjusting the operating modes of the vehicle circuit and the battery circuit when the battery water pump fails. This solves the problem of how to thermally manage the battery when the battery water pump fails, ensures the battery's operating performance, and improves the user experience.

[0081] Based on the first embodiment of the present application, in the second embodiment of the present application, the same or similar contents as those in the above embodiment 1 can be referred to the above introduction and will not be described in detail later. Figure 3 , Figure 3 This is a flow chart of the second embodiment of the thermal management method for battery water pump failure of the present application, wherein step S20 specifically includes:

[0082] Step S201: obtaining a first target water temperature range according to the target operating temperature.

[0083] It should be noted that in the vehicle system, high-voltage electrical appliances (such as MCU, DCDC, PDU, etc.) have their appropriate operating temperature range. When the vehicle water pump is working normally, the vehicle circuit is responsible for the heat dissipation of these high-voltage electrical appliances. However, in the event of a battery water pump failure, the vehicle circuit needs to take on the heat dissipation of the electrical appliances and the heating of the battery at the same time. Therefore, it is necessary to determine a water temperature range, that is, the first target water temperature range, based on the target operating temperature (i.e., the appropriate operating temperature) of the high-voltage electrical appliances to ensure that the high-voltage electrical appliances operate within the normal operating temperature. For example, assuming that the appropriate operating temperature of the high-voltage electrical appliances is 65°C, the first target water temperature range can be set to be less than or equal to 5°C of the appropriate operating temperature, that is, less than or equal to 60°C, to ensure the stable operation of the high-voltage electrical appliances.

[0084] Step S202: Obtain a second target water temperature range according to the battery temperature.

[0085] It should be noted that battery temperature is one of the key factors that determine battery performance. In a low temperature environment, battery performance will drop significantly, so it is necessary to increase the battery temperature by heating. According to the current temperature of the battery, a water temperature range, that is, the second target water temperature range, can be determined to ensure that the battery can be effectively heated to a suitable operating temperature. It can be understood that the purpose of this step is to determine a lower limit of water temperature to ensure that the battery can be effectively heated in a low temperature environment, so as to achieve its best performance. For example, assuming that the current temperature of the battery is 0°C, in order to ensure that the battery can be heated normally, the second target water temperature range can be set to be greater than or equal to the battery temperature plus 5°C, that is, greater than or equal to 5°C.

[0086] Step S203: Obtain a third target water temperature range according to the battery safety temperature.

[0087] It's important to note that while heating the battery is necessary to improve performance under low-temperature conditions, excessively high water temperatures can also damage the battery. Therefore, a water temperature upper limit, or the third target water temperature range, is set based on the battery's safe temperature to prevent battery safety issues caused by excessively high water temperatures. For example, if the battery's safe temperature is 55°C, the third target water temperature range should be set to 55°C or less.

[0088] Step S204: obtaining a target heating temperature according to the first target water temperature range, the second target water temperature range, and the third target water temperature range.

[0089] It's important to note that after determining the three target water temperature ranges, the system comprehensively considers these ranges to set the target heating temperature for the vehicle circuit. Specifically, the system typically selects the maximum value within the intersection of these three ranges as the target heating temperature, ensuring rapid heating of high-voltage electrical appliances and the battery while also ensuring battery safety.

[0090] In this embodiment, the target heating temperature of the vehicle circuit is determined by analyzing the range of multiple temperature parameters while satisfying different constraints, thereby optimizing the power performance of the vehicle while ensuring the safety of high-voltage electrical appliances and batteries.

[0091] Based on the first and second embodiments of the present application, in the third embodiment of the present application, the same or similar contents as those in the first and second embodiments can be referred to above and will not be described in detail. Figure 4 , Figure 4 This is a flow chart of the third embodiment of the thermal management method for battery water pump failure of the present application. The step of cooling based on the battery inlet water temperature and the battery temperature in step S30 specifically includes:

[0092] Step S301: Determine a first control strategy and a second control strategy based on the battery inlet water temperature and the battery temperature.

[0093] It should be noted that in this step, in addition to heating the battery when the battery is at a low temperature, the system also determines two control strategies, namely the first control strategy and the second control strategy, based on the real-time monitoring data of the battery inlet water temperature and the battery temperature, to avoid the vehicle circuit water temperature being too high when the battery water pump fails, which may have an adverse effect on the battery and high-voltage components.

[0094] Additionally, it should be noted that the first and second control strategies are used to control the cooling function of the air conditioning cooling system. The air conditioning cooling system includes components such as a compressor, evaporator, radiator, piping, expansion valve, and liquid storage desiccant, and cools the entire vehicle circuit through the refrigerant circulation.

[0095] In a feasible implementation manner, the step of determining the first control strategy and the second control strategy based on the battery inlet water temperature and the battery temperature specifically includes:

[0096] Step B10: Acquire the inlet water temperature threshold, the inlet water cooling temperature, the battery temperature threshold, and the battery cooling temperature.

[0097] It should be noted that the inlet water temperature threshold refers to the coolant temperature in the vehicle circuit, which, when reached, could damage the system or affect performance, requiring measures to lower the temperature. The inlet water cooling temperature is the threshold for shutting down the air conditioning cooling system, indicating that when the vehicle circuit coolant temperature drops to this value, it is safe enough and no further cooling is required. The battery temperature threshold and battery cooling temperature are pre-set based on the battery's technical specifications and performance requirements, and are used to determine whether the battery cooling system needs to be turned on or off, respectively, to protect battery performance and safety.

[0098] Step B20: Determine a first control strategy according to the battery inlet water temperature, the inlet water temperature threshold, and the inlet water cooling temperature.

[0099] It should be noted that in this step, specifically, the system will compare the battery inlet water temperature (T_in) obtained by the vehicle controller with the inlet water temperature threshold (T_high_in) and the inlet water cooling temperature (T_cool_in). If T_in ≥ T_high_in, the first part of the first control strategy is executed, that is, the air conditioning cooling system is turned on to reduce the water temperature of the vehicle circuit. If T_in ≤ T_cool_in, the second part of the first control strategy is executed, that is, the air conditioning cooling system is turned off. For example, in a high-speed driving scenario where the battery water pump fails, if the vehicle controller detects that T_in exceeds 50°C, the air conditioning cooling system is immediately started to prevent the water temperature of the vehicle circuit from being too high; when T_in drops below 40°C, the air conditioning cooling system is turned off to maintain a suitable water temperature environment and save energy consumption.

[0100] Step B30: Determine a second control strategy according to the battery temperature, the battery temperature threshold, and the battery cooling temperature.

[0101] It should be noted that in this step, specifically, the system compares the battery temperature (T_bat) with the battery temperature threshold (T_high_bat) and the battery cooling temperature (T_cool_bat). If T_bat ≥ T_high_bat, the first part of the second control strategy is executed, i.e., the battery cooling system is turned on to prevent battery overheating. If T_bat ≤ T_cool_bat, the second part of the second control strategy is executed, i.e., the battery cooling system is turned off.

[0102] Step S302: starting or stopping cooling according to the first control strategy and the second control strategy.

[0103] It should be noted that in this step, the system controls the opening and closing of the air conditioning and cooling system according to both the first and second control strategies. Specifically, for example, when any of the conditions in the first and second control strategies are met, the air conditioning and cooling system is controlled to start operating, and when neither of the two strategies requires cooling to start, the air conditioning and cooling system is turned off.

[0104] In a feasible implementation manner, step S302 specifically includes:

[0105] Step C10: When the first control strategy or the second control strategy meets the cooling start condition, start the cooling function.

[0106] It is understandable that the purpose of the first control strategy and the second control strategy is to solve the problem of excessive water temperature caused by intense driving of the vehicle.

[0107] Specifically, for example, when the system detects that the battery water inlet temperature T_in reaches or exceeds 50°C or the system detects that the battery temperature T_bat reaches or exceeds 40°C, the air conditioning cooling system will be immediately started to lower the water temperature to avoid damage to the battery and high-voltage electrical appliances, ensuring safe and stable operation of the system.

[0108] Step C20: When both the first control strategy and the second control strategy meet the conditions for turning off cooling, turning off the cooling function.

[0109] Specifically, for example, when the system detects that the battery water inlet temperature T_in ≤ 40°C, that is, the inlet water cooling temperature (T_cool_in), and the system detects that the battery temperature ≤ 35°C, that is, the battery cooling temperature (T_cool_bat), the air conditioning cooling system will be immediately shut down to save energy and reduce system noise.

[0110] In this embodiment, the first and second control strategies of the cooling system are formulated based on the battery inlet water temperature and the battery temperature. This ensures that during intense vehicle driving, especially in the event of battery water pump failure, the vehicle circuit circuit is protected from excessively high water temperatures due to intense driving, thereby protecting the battery safety.

[0111] This application also provides a thermal management device for battery water pump failure, please refer to Figure 5 , the thermal management device for battery water pump failure includes:

[0112] The temperature acquisition module 10 is used to obtain the target operating temperature of the target component, the battery temperature, the battery safety temperature and the battery inlet water temperature when the battery water pump fails.

[0113] The data processing module 20 is configured to obtain a target heating temperature according to the target operating temperature, the battery temperature, and the battery safety temperature.

[0114] The temperature control module 30 is used to control the vehicle circuit water temperature for heating according to the target heating temperature, and to cool based on the battery inlet water temperature and the battery temperature.

[0115] The thermal management device for battery water pump failure provided in this application adopts the thermal management method for battery water pump failure in the above-mentioned embodiment, which can solve the technical problem of how to thermally manage the battery when the battery water pump fails. Compared with the existing technology, the beneficial effects of the thermal management device for battery water pump failure provided in this application are the same as the beneficial effects of the thermal management method for battery water pump failure provided in the above-mentioned embodiment. The other technical features of the thermal management device for battery water pump failure are the same as those disclosed in the above-mentioned embodiment method, and are not further described here.

[0116] The present application provides a thermal management device for battery water pump failure, which includes: 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 the instructions are executed by the at least one processor so that the at least one processor can execute the thermal management method for battery water pump failure in the above-mentioned embodiment one.

[0117] Reference below Figure 6 , which shows a schematic structural diagram of a thermal management device suitable for implementing a battery water pump failure in an embodiment of the present application. The thermal management device for battery water pump failure in an embodiment of the present application may include, but is not limited to, mobile terminals such as mobile phones, laptop computers, digital broadcast receivers, PDAs (Personal Digital Assistants), PADs (Portable Application Descriptions), PMPs (Portable Media Players), in-vehicle terminals (e.g., in-vehicle navigation terminals), and fixed terminals such as digital TVs and desktop computers. Figure 6 The thermal management device for battery water pump failure shown is merely an example and should not limit the functions and scope of use of the embodiments of the present application.

[0118] like Figure 6As shown, the thermal management device for a battery water pump failure may include a processing device 1001 (e.g., a central processing unit, a graphics processing unit, etc.), which can perform various appropriate actions and processes based on a program stored in a read-only memory (ROM) 1002 or a program loaded from a storage device 1003 into a random access memory (RAM) 1004. RAM 1004 also stores various programs and data required for the operation of the thermal management device for a battery water pump failure. Processing device 1001, ROM 1002, and RAM 1004 are connected to each other via a bus 1005. An input / output (I / O) interface 1006 is also connected to the bus. Typically, the following systems can be connected to I / O interface 1006: input device 1007 including, for example, a touch screen, touchpad, keyboard, mouse, image sensor, microphone, accelerometer, gyroscope, etc.; output device 1008 including, for example, a liquid crystal display (LCD), speaker, vibrator, etc.; storage device 1003 including, for example, a magnetic tape, hard disk, etc.; and communication device 1009. Communication device 1009 can allow the thermal management device for battery water pump failure to communicate wirelessly or wired with other devices to exchange data. Although the figure shows a thermal management device for battery water pump failure with various systems, it should be understood that it is not required to implement or have all of the systems shown. More or fewer systems may be implemented or have instead.

[0119] In particular, according to the embodiments disclosed in the present application, the processes described above with reference to the flowcharts can be implemented as computer software programs. For example, the embodiments disclosed in the present application include a computer program product comprising a computer program carried on a computer-readable medium, the computer program comprising program code for executing the method shown in the flowchart. In such an embodiment, the computer program can be downloaded and installed from a network via a communication device, or installed from a storage device 1003, or installed from a ROM 1002. When the computer program is executed by the processing device 1001, the above-mentioned functions defined in the method of the embodiment disclosed in the present application are executed.

[0120] The thermal management device for battery water pump failure provided in this application adopts the thermal management method for battery water pump failure in the above-mentioned embodiment, which can solve the technical problem of how to thermally manage the battery when the battery water pump fails. Compared with the existing technology, the beneficial effects of the thermal management device for battery water pump failure provided in this application are the same as the beneficial effects of the thermal management method for battery water pump failure provided in the above-mentioned embodiment. The other technical features of the thermal management device for battery water pump failure are the same as those disclosed in the above-mentioned embodiment, and are not further described here.

[0121] It should be understood that the various parts disclosed in this application can be implemented using hardware, software, firmware, or a combination thereof. In the description of the above embodiments, specific features, structures, materials, or characteristics can be combined in any one or more embodiments or examples in a suitable manner.

[0122] The above description is merely a specific embodiment of the present application, but the scope of protection of the present application is not limited thereto. Any changes or substitutions that can be easily conceived by a person skilled in the art within the technical scope disclosed in this application should be included in the scope of protection of this application. Therefore, the scope of protection of this application should be based on the scope of protection of the claims.

[0123] The present application provides a computer-readable storage medium having computer-readable program instructions (ie, a computer program) stored thereon, wherein the computer-readable program instructions are used to execute the thermal management method for battery water pump failure in the above-mentioned embodiment.

[0124] The computer-readable storage medium provided in this application may be, for example, a USB flash drive, but is not limited to electrical, magnetic, optical, electromagnetic, infrared, or semiconductor systems, systems or devices, or any combination thereof. More specific examples of computer-readable storage media may include, but are not limited to: an electrical connection with one or more wires, a portable computer disk, a hard disk, a random access memory (RAM), a read-only memory (ROM), an erasable programmable read-only memory (EPROM or flash memory), an optical fiber, a portable compact disk read-only memory (CD-ROM), an optical storage device, a magnetic storage device, or any suitable combination thereof. In this embodiment, the computer-readable storage medium may be any tangible medium that contains or stores a program that can be used by or in conjunction with an instruction execution system, system or device. The program code contained on the computer-readable storage medium may be transmitted using any appropriate medium, including but not limited to: wires, optical cables, RF (Radio Frequency), etc., or any suitable combination thereof.

[0125] The computer-readable storage medium may be included in the thermal management device for battery water pump failure; or may exist independently without being assembled into the thermal management device for battery water pump failure.

[0126] The above-mentioned computer-readable storage medium carries one or more programs. When the above-mentioned one or more programs are executed by the thermal management device of the battery water pump failure, the thermal management device of the battery water pump failure: when the battery water pump fails, obtains the target operating temperature, battery temperature, battery safety temperature and battery inlet water temperature of the target component; obtains the target heating temperature according to the target operating temperature, the battery temperature and the battery safety temperature; controls the vehicle circuit water temperature for heating according to the target heating temperature, and cools based on the battery inlet water temperature and the battery temperature.

[0127] Computer program code for performing the operations of the present application may be written in one or more programming languages, or a combination thereof, including object-oriented programming languages ​​such as Java, Smalltalk, C++, and conventional procedural programming languages ​​such as "C" or similar programming languages. The program code may be executed entirely on the user's computer, partially on the user's computer, as a stand-alone software package, partially on the user's computer and partially on a remote computer, or entirely on the remote computer or server. In cases involving a remote computer, the remote computer may be connected to the user's computer through any type of network, including a local area network (LAN) or a wide area network (WAN), or may be connected to an external computer (e.g., through the Internet using an Internet service provider).

[0128] The flow charts and block diagrams in the accompanying drawings illustrate the possible architecture, functions and operations of the systems, methods and computer program products according to various embodiments of the present application. In this regard, each box in the flow chart or block diagram can represent a module, program segment or a part of code, and the module, program segment or a part of code contains one or more executable instructions for realizing the specified logical function. It should also be noted that in some alternative implementations, the functions marked in the box can also occur in a different order than that marked in the accompanying drawings. For example, two boxes represented in succession can actually be executed substantially in parallel, and they can sometimes be executed in the opposite order, depending on the functions involved. It should also be noted that each box in the block diagram and / or flow chart, and the combination of the boxes in the block diagram and / or flow chart can be implemented by a dedicated hardware-based system that performs the specified function or operation, or can be implemented by a combination of dedicated hardware and computer instructions.

[0129] The modules described in the embodiments of the present application may be implemented in software or hardware, wherein the name of a module does not necessarily limit the unit itself.

[0130] The computer-readable storage medium provided in this application is a computer-readable storage medium that stores computer-readable program instructions (i.e., a computer program) for executing the aforementioned thermal management method for battery water pump failure. This computer-readable storage medium can address the technical problem of thermally managing a battery when a battery water pump fails. Compared to the prior art, the beneficial effects of the computer-readable storage medium provided in this application are the same as those of the thermal management method for battery water pump failure provided in the aforementioned embodiments, and are not further elaborated here.

[0131] The present application also provides a computer program product, including a computer program, which implements the steps of the thermal management method for battery water pump failure as described above when the computer program is executed by a processor.

[0132] The computer program product provided in this application can solve the technical problem of how to thermally manage batteries when a battery water pump fails. Compared to the prior art, the beneficial effects of the computer program product provided in this application are the same as those of the thermal management method for battery water pump failure provided in the above-mentioned embodiment, and will not be elaborated here.

[0133] The above description is only part of the embodiments of the present application and does not limit the patent scope of the present application. All equivalent structural transformations made by using the contents of the present application specification and drawings under the technical concept of the present application, or direct / indirect application in other related technical fields are included in the patent protection scope of the present application.

Claims

1. A thermal management method for battery water pump failure, characterized in that: The thermal management method is applied to a thermal management system, which includes an air conditioning system, a battery circuit, and a vehicle circuit. The air conditioning system exchanges heat with the battery circuit and the vehicle circuit respectively through a heat exchanger. The method comprises: When the battery water pump fails, the vehicle circuit and the battery circuit are switched from parallel to series connection; Obtaining a target operating temperature of a target component, a battery temperature, a battery safety temperature, and a battery inlet water temperature, where the target operating temperature of the target component refers to the temperature at which the high-voltage component operates at optimal performance; Obtaining a first target water temperature range according to the target operating temperature; obtaining a second target water temperature range according to the battery temperature; obtaining a third target water temperature range according to the battery safety temperature; Obtaining a target heating temperature according to the first target water temperature range, the second target water temperature range, and the third target water temperature range; The vehicle circuit water temperature is controlled to be heated according to the target heating temperature, and the vehicle circuit water temperature is controlled to be cooled based on the battery inlet water temperature and the battery temperature.

2. The method according to claim 1, wherein The step of cooling based on the battery inlet water temperature and the battery temperature includes: determining a first control strategy and a second control strategy based on the battery inlet water temperature and the battery temperature; Cooling is activated or deactivated according to the first control strategy and the second control strategy.

3. The method according to claim 2, wherein The step of determining the first control strategy and the second control strategy based on the battery inlet water temperature and the battery temperature includes: Obtaining an inlet water temperature threshold, an inlet water cooling temperature, a battery temperature threshold, and a battery cooling temperature; determining a first control strategy according to the battery inlet water temperature, the inlet water temperature threshold, and the inlet water cooling temperature; A second control strategy is determined according to the battery temperature, the battery temperature threshold, and the battery cooling temperature.

4. The method according to claim 2, wherein The step of starting or stopping cooling according to the first control strategy and the second control strategy includes: When the first control strategy or the second control strategy meets the cooling start condition, starting the cooling function; When both the first control strategy and the second control strategy meet the conditions for turning off cooling, the cooling function is turned off.

5. The method according to claim 1, wherein When the battery water pump fails, after obtaining the target operating temperature of the target component, the battery temperature, the battery safety temperature, and the battery inlet water temperature, the method further includes: During battery charging, determining whether the battery temperature is lower than a preset battery low temperature threshold; When the battery temperature is lower than a preset battery low temperature threshold, heating is turned on, and the vehicle circuit water temperature is controlled to heat according to a preset target charging temperature.

6. A thermal management device for battery water pump failure, characterized in that: The thermal management device for battery water pump failure is applied to the thermal management method for battery water pump failure according to any one of claims 1 to 5, and the device comprises: The temperature acquisition module is used to switch the vehicle circuit and the battery circuit from a parallel state to a series state when the battery water pump fails; obtain the target operating temperature of the target component, the battery temperature, the battery safety temperature, and the battery inlet water temperature. The target operating temperature of the target component refers to the temperature at which the high-voltage component operates at optimal performance; a data processing module, configured to obtain a first target water temperature range based on the target operating temperature; obtain a second target water temperature range based on the battery temperature; obtain a third target water temperature range based on the battery safety temperature; and obtain a target heating temperature based on the first target water temperature range, the second target water temperature range, and the third target water temperature range; The temperature control module is used to control the vehicle circuit water temperature for heating according to the target heating temperature, and to cool based on the battery inlet water temperature and the battery temperature.

7. A thermal management device for battery water pump failure, characterized in that: The device includes: a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein the computer program is configured to implement the steps of the thermal management method for battery water pump failure according to any one of claims 1 to 5.

8. A storage medium, characterized in that: The storage medium is a computer-readable storage medium, and a computer program is stored on the storage medium. When the computer program is executed by a processor, the steps of the thermal management method for battery water pump failure according to any one of claims 1 to 5 are implemented.

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