Intelligent Battery Thermal Management Control Method and System for Electric Vehicles

Abstract

The present invention relates to an intelligent battery thermal management control method and system for electric vehicles. The method comprises the following steps: obtaining the vehicle geographical latitude, local ambient temperature, vehicle battery temperature, and state of charge of the battery of the vehicle; judging whether the location where the vehicle is located is in the north or the south according to the vehicle geographical latitude; judging whether the battery thermal management mode enters a cooling mode or a heating mode according to the vehicle battery temperature; presetting a cooling mode threshold mapping table or a heating mode threshold mapping table based on the location where the vehicle is located and the battery thermal management mode, and according to the local ambient temperature and the state of charge of the battery, and respectively executing different battery thermal management cooling strategies or different battery thermal management heating strategies. Therefore, it is possible to intelligently match the cooling or heating strategies under different modes according to the geographical location of the vehicle, the local ambient temperature, the vehicle battery temperature, and the state of charge of the battery, improving the driving experience, optimizing the vehicle energy consumption, and prolonging the service life of the battery.

Description

Technical Field

[0001] The present invention relates to the technical field of battery thermal management for electric vehicles, and particularly to an intelligent battery thermal management control method and system for electric vehicles. Background Art

[0002] Electric vehicles include pure electric vehicles, plug-in hybrid vehicles, range-extended electric vehicles, etc.; when an electric vehicle is running in pure electric mode, while meeting the sufficient power demand, it is necessary to consider the battery life safety and energy consumption. Long-term pure electric operation of an electric vehicle in a high-temperature environment will directly affect the battery service life and also pose a high challenge to the vehicle energy consumption. When an electric vehicle is running in pure electric mode in a low-temperature environment, it is more sensitive to driving economy, and the energy consumption index directly affects the pure electric driving range of the vehicle.

[0003] Traditional battery thermal management control strategies are relatively simple and do not consider the location of the vehicle in the north or south, the local temperature, and the current state of charge (SOC) of the vehicle battery. The one-size-fits-all battery thermal management strategy is relatively simple and crude, which may cause an excess of available power of the battery at low temperatures, an increase in thermal management energy consumption, and thus a serious reduction in the vehicle driving range. In addition, vehicles located in the south may experience serious attenuation of the battery cycle life under the premise of maintaining the same battery thermal management control strategy as vehicles in the north due to long-term operation in a high-temperature environment. Summary of the Invention

[0004] The present invention provides an intelligent battery thermal management control method and system for electric vehicles, which can intelligently match cooling or heating strategies in different modes according to the geographical location of the vehicle, the local environmental temperature, the vehicle battery temperature, and the state of charge of the battery, improving the driving experience, optimizing the vehicle energy consumption, and extending the service life of the battery.

[0005] In a first aspect, the present invention provides an intelligent battery thermal management control method for electric vehicles, including the following steps:

[0006] Obtain the vehicle geographical latitude, local environmental temperature, vehicle battery temperature, and state of charge of the battery of the vehicle;

[0007] Judge whether the location of the vehicle is in the north or south according to the vehicle geographical latitude;

[0008] Judge whether the battery thermal management mode enters the cooling mode or the heating mode according to the vehicle battery temperature;

[0009] Based on the location of the vehicle and the battery thermal management mode, and according to the local environmental temperature and the state of charge of the battery, preset a cooling mode threshold mapping table or a heating mode threshold mapping table, and respectively execute different battery thermal management cooling strategies or different battery thermal management heating strategies.

[0010] In some embodiments, the step of "judging whether the location of the vehicle is in the north or south according to the geographical latitude of the vehicle" specifically includes the following steps:

[0011] When it is detected that the geographical latitude of the vehicle is greater than the preset reference latitude, it is judged that the vehicle is located in the north;

[0012] When it is detected that the geographical latitude of the vehicle is less than the preset reference latitude, it is judged that the vehicle is located in the south.

[0013] In some embodiments, the step of "judging whether the battery thermal management mode enters the cooling mode or the heating mode according to the battery temperature of the vehicle" specifically includes the following steps:

[0014] When it is detected that the battery temperature of the vehicle matches the preset battery reference high temperature, it is judged that the battery thermal management mode enters the cooling mode;

[0015] When it is detected that the battery temperature of the vehicle matches the preset battery reference low temperature, it is judged that the battery thermal management mode enters the heating mode.

[0016] In some embodiments, the step of "when it is detected that the battery temperature of the vehicle matches the preset battery reference high temperature, it is judged that the battery thermal management mode enters the cooling mode; based on the location of the vehicle and the battery thermal management mode, and according to the local ambient temperature and the state of charge of the battery, a preset cooling mode threshold mapping table is used to execute different battery thermal management cooling strategies" specifically includes the following steps:

[0017] When it is judged that the vehicle is located in the north, the battery thermal management mode enters the cooling mode, and it is detected that the local ambient temperature is greater than the preset northern ambient reference high temperature, the state of charge of the battery is greater than the preset northern reference battery charge value for the cooling mode, and according to the preset cooling mode threshold mapping table, the first battery thermal management cooling strategy is executed;

[0018] When it is judged that the vehicle is located in the north, the battery thermal management mode enters the cooling mode, and it is detected that the local ambient temperature is greater than the preset northern ambient reference high temperature, the state of charge of the battery is less than the preset northern reference battery charge value for the cooling mode, and according to the preset cooling mode threshold mapping table, the second battery thermal management cooling strategy is executed;

[0019] When it is judged that the vehicle is located in the north, the battery thermal management mode enters the cooling mode, and it is detected that the local ambient temperature is less than the preset northern ambient reference high temperature, the state of charge of the battery is less than the preset northern reference battery charge value for the cooling mode, and according to the preset cooling mode threshold mapping table, the third battery thermal management cooling strategy is executed;

[0020] When it is determined that the location of the vehicle is in the north, the battery thermal management mode enters the cooling mode, and it is detected that the local ambient temperature is less than the preset northern ambient reference high temperature, the state of charge of the battery is greater than the preset northern reference battery charge value for the cooling mode, and according to the preset cooling mode threshold mapping table, the fourth battery thermal management cooling strategy is executed;

[0021] When it is determined that the location of the vehicle is in the south, the battery thermal management mode enters the cooling mode, and it is detected that the local ambient temperature is less than the preset southern ambient reference high temperature, the state of charge of the battery is greater than the preset southern reference battery charge value for the cooling mode, and according to the preset cooling mode threshold mapping table, the fifth battery thermal management cooling strategy is executed;

[0022] When it is determined that the location of the vehicle is in the south, the battery thermal management mode enters the cooling mode, and it is detected that the local ambient temperature is less than the preset southern ambient reference high temperature, the state of charge of the battery is less than the preset southern reference battery charge value for the cooling mode, and according to the preset cooling mode threshold mapping table, the sixth battery thermal management cooling strategy is executed;

[0023] When it is determined that the location of the vehicle is in the south, the battery thermal management mode enters the cooling mode, and it is detected that the local ambient temperature is greater than the preset southern ambient reference high temperature, the state of charge of the battery is less than the preset southern reference battery charge value for the cooling mode, and according to the preset cooling mode threshold mapping table, the seventh battery thermal management cooling strategy is executed;

[0024] When it is determined that the location of the vehicle is in the south, the battery thermal management mode enters the cooling mode, and it is detected that the local ambient temperature is greater than the preset southern ambient reference high temperature, the state of charge of the battery is greater than the preset southern reference battery charge value for the cooling mode, and according to the preset cooling mode threshold mapping table, the eighth battery thermal management cooling strategy is executed.

[0025] In some embodiments, the step of "when it is detected that the temperature of the vehicle battery matches the preset battery reference low temperature, it is determined that the battery thermal management mode enters the heating mode; based on the location of the vehicle and the battery thermal management mode, and according to the local ambient temperature and the state of charge of the battery, the preset heating mode threshold mapping table, different battery thermal management heating strategies are executed" specifically includes the following steps:

[0026] When it is determined that the location of the vehicle is in the north, the battery thermal management mode enters the heating mode, and it is detected that the local ambient temperature is less than the preset northern ambient reference low temperature, the state of charge of the battery is greater than the preset northern reference battery charge value for the heating mode, and according to the preset heating mode threshold mapping table, the first battery thermal management heating strategy is executed;

[0027] When it is determined that the location of the vehicle is in the north, the battery thermal management mode enters the heating mode, and it is detected that the local ambient temperature is lower than the preset northern ambient reference low temperature, the state of charge of the battery is lower than the preset northern reference battery charge value for the heating mode, and according to the preset heating mode threshold mapping table, the second battery thermal management heating strategy is executed;

[0028] When it is determined that the location of the vehicle is in the north, the battery thermal management mode enters the heating mode, and it is detected that the local ambient temperature is higher than the preset northern ambient reference low temperature, the state of charge of the battery is lower than the preset northern reference battery charge value for the heating mode, and according to the preset heating mode threshold mapping table, the third battery thermal management heating strategy is executed;

[0029] When it is determined that the location of the vehicle is in the north, the battery thermal management mode enters the heating mode, and it is detected that the local ambient temperature is higher than the preset northern ambient reference low temperature, the state of charge of the battery is higher than the preset northern reference battery charge value for the heating mode, and according to the preset heating mode threshold mapping table, the fourth battery thermal management heating strategy is executed;

[0030] When it is determined that the location of the vehicle is in the south, the battery thermal management mode enters the heating mode, and it is detected that the local ambient temperature is higher than the preset southern ambient reference low temperature, the state of charge of the battery is higher than the preset southern reference battery charge value for the heating mode, and according to the preset heating mode threshold mapping table, the fifth battery thermal management heating strategy is executed;

[0031] When it is determined that the location of the vehicle is in the south, the battery thermal management mode enters the heating mode, and it is detected that the local ambient temperature is higher than the preset southern ambient reference low temperature, the state of charge of the battery is lower than the preset southern reference battery charge value for the heating mode, and according to the preset heating mode threshold mapping table, the sixth battery thermal management heating strategy is executed;

[0032] When it is determined that the location of the vehicle is in the south, the battery thermal management mode enters the heating mode, and it is detected that the local ambient temperature is lower than the preset southern ambient reference low temperature, the state of charge of the battery is lower than the preset southern reference battery charge value for the heating mode, and according to the preset heating mode threshold mapping table, the seventh battery thermal management heating strategy is executed;

[0033] When it is determined that the location of the vehicle is in the south, the battery thermal management mode enters the heating mode, and it is detected that the local ambient temperature is lower than the preset southern ambient reference low temperature, the state of charge of the battery is higher than the preset southern reference battery charge value for the heating mode, and according to the preset heating mode threshold mapping table, the eighth battery thermal management heating strategy is executed.

[0034] In some embodiments, the step of "battery thermal management cooling strategy" specifically includes the following steps:

[0035] When it is detected that the current battery temperature is greater than or equal to the first preset entry temperature threshold and less than the second preset entry temperature threshold, then control the maximum battery temperature to be less than or equal to the first preset exit temperature threshold, and set the first coolant target inlet information;

[0036] When it is detected that the current battery temperature is greater than or equal to the second preset entry temperature threshold and less than the third preset entry temperature threshold, then control the maximum battery temperature to be less than or equal to the second preset exit temperature threshold, and set the second coolant target inlet information;

[0037] When it is detected that the current battery temperature is greater than or equal to the third preset entry temperature threshold, then control the maximum battery temperature to be less than or equal to the third preset exit temperature threshold, and set the third coolant target inlet information.

[0038] In some embodiments, the step of "battery thermal management heating strategy" specifically includes the following steps:

[0039] When it is detected that the current battery temperature is greater than or equal to the fifth preset entry temperature threshold and less than the fourth preset entry temperature threshold, then control the minimum battery temperature to be greater than or equal to the fourth preset exit temperature threshold, and set the fourth coolant target inlet information;

[0040] When it is detected that the current battery temperature is less than the fifth preset entry temperature threshold, then control the minimum battery temperature to be greater than or equal to the fifth preset exit temperature threshold, and set the fifth coolant target inlet information.

[0041] In some embodiments, before the step of "presetting a cooling mode threshold mapping table or a heating mode threshold mapping table based on the location of the vehicle and the battery thermal management mode, and according to the local ambient temperature and the state of charge of the battery, and respectively executing different battery thermal management cooling strategies or different battery thermal management heating strategies", the following steps are specifically included:

[0042] Judge the type of the driver's driving habit;

[0043] When it is judged that the type of the driving habit is an aggressive type, then match the battery thermal management cooling strategy or the battery thermal management heating strategy in the sport mode of the vehicle;

[0044] When it is judged that the type of the driving habit is a comfortable and normal type, then match the battery thermal management cooling strategy or the battery thermal management heating strategy in the comfort mode of the vehicle;

[0045] When it is judged that the type of the driving habit is an economic type, then match the battery thermal management cooling strategy or the battery thermal management heating strategy in the eco mode of the vehicle.

[0046] Second aspect, the present invention provides an intelligent battery thermal management control system for an electric vehicle, including:

[0047] A vehicle information acquisition module, configured to acquire the vehicle's geographical latitude, local ambient temperature, vehicle battery temperature, and state of charge of the battery;

[0048] A geographical location determination module, communicatively connected to the vehicle information acquisition module, configured to determine whether the location where the vehicle is located is in the north or south according to the vehicle's geographical latitude;

[0049] A mode determination module, communicatively connected to the vehicle information acquisition module, configured to determine whether the battery thermal management mode enters the cooling mode or the heating mode according to the vehicle battery temperature; and,

[0050] A cooling and heating strategy module, communicatively connected to the vehicle information acquisition module, the geographical location determination module, and the mode determination module, configured to preset a cooling mode threshold mapping table or a preset heating mode threshold mapping table based on the location where the vehicle is located and the battery thermal management mode, and respectively execute different battery thermal management cooling strategies or different battery thermal management heating strategies according to the local ambient temperature and the state of charge of the battery.

[0051] In some embodiments, it further includes a driving habit type module, communicatively connected to the cooling and heating strategy module, configured to determine the type of the driver's driving habit; when it is determined that the type of the driving habit is an aggressive type, then match the battery thermal management cooling strategy or the battery thermal management heating strategy in the vehicle's sport mode; when it is determined that the type of the driving habit is a comfortable and normal type, then match the battery thermal management cooling strategy or the battery thermal management heating strategy in the vehicle's comfort mode; when it is determined that the type of the driving habit is an economic type, then match the battery thermal management cooling strategy or the battery thermal management heating strategy in the vehicle's eco mode.

[0052] The beneficial effects brought by the technical solution provided by the present invention include:

[0053] The present invention first obtains the vehicle geographical latitude, local ambient temperature, vehicle battery temperature, and state of charge of the vehicle battery; determines whether the location of the vehicle is in the north or south according to the vehicle geographical latitude; determines whether the battery thermal management mode enters the cooling mode or the heating mode according to the vehicle battery temperature; finally, based on the location of the vehicle and the battery thermal management mode, and according to the state of charge of the battery, a preset cooling mode threshold mapping table and a preset heating mode threshold mapping table are set, and different battery thermal management cooling strategies and different battery thermal management heating strategies are respectively executed; therefore, the present invention monitors the vehicle geographical latitude of the vehicle through a big data platform, judges the change of the ambient temperature of the geographical location where the vehicle is located, and at the same time considers the state of charge SOC (State of Charge) of the battery, and matches and executes different battery thermal management cooling strategies or different battery thermal management heating strategies, thereby improving the battery working efficiency, ensuring both the sufficient power performance of the vehicle and greatly reducing the energy consumption, and prolonging the service life of the battery cell. BRIEF DESCRIPTION OF THE DRAWINGS

[0054] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following will briefly introduce the drawings required for the description of the embodiments. Obviously, the drawings in the following description are only some embodiments of the present invention, and those of ordinary skill in the art can also obtain other drawings based on these drawings without creative efforts.

[0055] Figure 1 It is a schematic flow chart of the steps of the intelligent battery thermal management control method for an electric vehicle according to an embodiment of the present invention;

[0056] Figure 2 It is a schematic flow chart of the steps of eight battery thermal management cooling strategies according to another embodiment of the present invention;

[0057] Figure 3 It is a schematic flow chart of the steps of eight battery thermal management heating strategies according to an embodiment of the present invention;

[0058] Figure 4 It is a schematic flow chart of the steps of three levels of battery thermal management cooling strategies according to an embodiment of the present invention;

[0059] Figure 5 It is a schematic flow chart of the steps of two levels of battery thermal management heating strategies according to an embodiment of the present invention;

[0060] Figure 6 It is a schematic structural diagram of an intelligent battery thermal management control system for an electric vehicle according to an embodiment of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS:

[0062] 100. Electric vehicle intelligent battery thermal management control system; 110. Vehicle information acquisition module; 120. Geographic location judgment module; 130. Mode judgment module; 140. Cooling and heating strategy module; 150. Driving habit type module. Detailed implementation manners

[0063] Now, specific embodiments of the present invention will be described in detail. Examples of the present invention are illustrated in the accompanying drawings. Although the present invention will be described in conjunction with specific embodiments, it will be understood that it is not intended to limit the present invention to the described embodiments. On the contrary, it is intended to cover modifications, variations, and equivalents included within the spirit and scope of the present invention as defined by the appended claims. It should be noted that the method steps described herein can all be implemented by any functional block or functional arrangement, and any functional block or functional arrangement can be implemented as a physical entity or a logical entity, or a combination of both.

[0064] To enable those skilled in the art to better understand the present invention, the present invention will be further described in detail below in conjunction with the accompanying drawings and specific implementation manners.

[0065] Note: The examples to be introduced next are only specific examples and do not limit the embodiments of the present invention to the following specific steps, numerical values, conditions, data, sequences, etc. Those skilled in the art can use the concept of the present invention to construct more embodiments not mentioned in this specification by reading this specification.

[0066] The present invention provides a method and system for adaptive lifting of automobile windows based on perception fusion, which solves the problems of environmental pollution inside the vehicle and poor riding experience caused by the windows not being closed or not being fully closed during bad weather when the vehicle is parked outdoors, and improves the intelligence and comfort of the vehicle.

[0067] Specifically, as Figure 1 shown, the present invention provides an electric vehicle intelligent battery thermal management control method, including the following steps:

[0068] S100. Obtain the vehicle geographical latitude, local environmental temperature, vehicle battery temperature, and state of charge of the battery of the vehicle;

[0069] S200. Determine whether the location where the vehicle is located is in the north or the south according to the vehicle geographical latitude;

[0070] S300. Determine whether the battery thermal management mode enters the cooling mode or the heating mode according to the vehicle battery temperature;

[0071] The S400 presets a cooling mode threshold mapping table or a heating mode threshold mapping table based on the location of the vehicle and the battery thermal management mode, and according to the local ambient temperature and the state of charge of the battery, and respectively executes different battery thermal management cooling strategies or different battery thermal management heating strategies.

[0072] Specifically, in this embodiment, since the traditional battery thermal management control strategy is relatively simple and does not consider the north-south position of the vehicle, the local temperature condition and the current state of charge SOC of the vehicle battery, the one-size-fits-all battery thermal management strategy is relatively simple and crude, which may cause the available power of the battery to be excessive at low temperatures, increase the thermal management energy consumption, and further lead to a serious reduction in the vehicle's cruising range. In addition, vehicles located in the south may cause serious attenuation of the battery cycle life under the premise of maintaining the same battery thermal management control strategy as vehicles located in the north due to working in a high-temperature environment for a long time.

[0073] Therefore, to solve the above problems, the present invention first obtains the vehicle geographical latitude, local ambient temperature, vehicle battery temperature, and state of charge of the battery of the vehicle; judges whether the location of the vehicle is in the north or the south according to the vehicle geographical latitude; judges whether the battery thermal management mode enters the cooling mode or the heating mode according to the vehicle battery temperature; and finally presets a cooling mode threshold mapping table and a heating mode threshold mapping table based on the location of the vehicle and the battery thermal management mode, and according to the local ambient temperature and the state of charge of the battery, and respectively executes different battery thermal management cooling strategies and different battery thermal management heating strategies; therefore, the present invention monitors the vehicle geographical latitude of the vehicle through a big data platform, judges the change of the ambient temperature of the geographical location where the vehicle is located, and at the same time combines the consideration of the state of charge SOC (State of Charge) of the battery, and matches and executes different battery thermal management cooling strategies or different battery thermal management heating strategies, so as to improve the battery working efficiency, ensure both the sufficient power performance of the vehicle and greatly reduce the energy consumption, and extend the service life of the battery cells.

[0074] Preferably, in another embodiment of the present application, the step of "S200, judging whether the location of the vehicle is in the north or the south according to the vehicle geographical latitude" specifically includes the following steps:

[0075] S210, when it is detected that the vehicle geographical latitude is greater than a preset reference latitude, it is judged that the location of the vehicle is in the north;

[0076] S220, when it is detected that the vehicle geographical latitude is less than a preset reference latitude, it is judged that the location of the vehicle is in the south.

[0077] Specifically, in this embodiment, since the traditional battery thermal management control strategy is relatively simple and does not consider the north-south position of the vehicle, the one-size-fits-all battery thermal management strategy is relatively simple and crude. Therefore, it is first necessary to determine whether the vehicle is located in the north or the south, and then based on the location of the vehicle, provide a prerequisite for selecting and implementing different battery thermal management cooling strategies or different battery thermal management heating strategies. Generally, the preset reference dimension TBD1 (To Be Determined) is 34° north latitude, that is, the Qinling-Huaihe Line.

[0078] Preferably, in another embodiment of the present application, the step of "S300, according to the vehicle battery temperature, determine whether the battery thermal management mode enters the cooling mode or the heating mode" specifically includes the following steps:

[0079] S310, when it is detected that the vehicle battery temperature matches the preset battery reference high temperature, determine that the battery thermal management mode enters the cooling mode;

[0080] S320, when it is detected that the vehicle battery temperature matches the preset battery reference low temperature, determine that the battery thermal management mode enters the heating mode.

[0081] Specifically, in this embodiment, before performing different cooling modes or heating modes, it is necessary to respectively match the preset battery reference high temperature or the preset battery reference low temperature based on the vehicle battery temperature. Only by determining the mode entered by the battery thermal management mode can subsequent operations be carried out.

[0082] Preferably, in another embodiment of the present application, when the location of the vehicle and the battery thermal management mode are determined, and then combined with the local ambient temperature and the state of charge of the battery, different battery thermal management cooling strategies are implemented;

[0083] The proportion of high-temperature weather in the south is much greater than that in the north. To balance the relationship between the service life of the battery and the driving energy consumption, it is necessary to match different cooling strategies according to the local ambient temperature. The local ambient temperature Tamb for distinguishing different cooling strategies in the north is generally the preset ambient reference high temperature TBD3 - 38 ± 3°C, and the corresponding preset ambient reference high temperature TBD2 in the south is generally 3 - 5°C lower than TBD3.

[0084] The preset northern reference battery state of charge SOC TBD5 for the cooling mode in the north is generally 50% - 55%, and the corresponding preset southern reference battery state of charge SOC TBD4 for the cooling mode in the south is generally 5% - 10% lower than TBD5; See Figure 2 As shown, according to the location of the vehicle, the local ambient temperature, and the state of charge of the battery, the driving battery thermal management cooling strategy can be divided into 8 modes;

[0085] Specifically, the steps of "S310. When it is detected that the vehicle battery temperature matches the preset battery reference high temperature, it is determined that the battery thermal management mode enters the cooling mode; S400. Based on the location of the vehicle and the battery thermal management mode, and according to the local ambient temperature and the state of charge of the battery, a preset cooling mode threshold mapping table is set, and different battery thermal management cooling strategies are executed" specifically include the following steps:

[0086] S410. When it is determined that the location of the vehicle is in the north, the battery thermal management mode enters the cooling mode, and it is detected that the local ambient temperature is greater than the preset northern ambient reference high temperature, the state of charge of the battery is greater than the preset northern reference battery state of charge value in the cooling mode, and according to the preset cooling mode threshold mapping table, the first battery thermal management cooling strategy is executed;

[0087] S420. When it is determined that the location of the vehicle is in the north, the battery thermal management mode enters the cooling mode, and it is detected that the local ambient temperature is greater than the preset northern ambient reference high temperature, the state of charge of the battery is less than the preset northern reference battery state of charge value in the cooling mode, and according to the preset cooling mode threshold mapping table, the second battery thermal management cooling strategy is executed;

[0088] S430. When it is determined that the location of the vehicle is in the north, the battery thermal management mode enters the cooling mode, and it is detected that the local ambient temperature is less than the preset northern ambient reference high temperature, the state of charge of the battery is less than the preset northern reference battery state of charge value in the cooling mode, and according to the preset cooling mode threshold mapping table, the third battery thermal management cooling strategy is executed;

[0089] S440. When it is determined that the location of the vehicle is in the north, the battery thermal management mode enters the cooling mode, and it is detected that the local ambient temperature is less than the preset northern ambient reference high temperature, the state of charge of the battery is greater than the preset northern reference battery state of charge value in the cooling mode, and according to the preset cooling mode threshold mapping table, the fourth battery thermal management cooling strategy is executed;

[0090] S450. When it is determined that the location of the vehicle is in the south, the battery thermal management mode enters the cooling mode, and it is detected that the local ambient temperature is less than the preset southern ambient reference high temperature, the state of charge of the battery is greater than the preset southern reference battery state of charge value in the cooling mode, and according to the preset cooling mode threshold mapping table, the fifth battery thermal management cooling strategy is executed;

[0091] S460. When it is determined that the location of the vehicle is in the south, the battery thermal management mode enters the cooling mode, and it is detected that the local ambient temperature is less than the preset southern ambient reference high temperature, the state of charge of the battery is less than the preset southern reference battery state of charge value in the cooling mode, and according to the preset cooling mode threshold mapping table, the sixth battery thermal management cooling strategy is executed;

[0092] S470. When it is determined that the location of the vehicle is in the south, the battery thermal management mode enters the cooling mode, and it is detected that the local ambient temperature is greater than the preset southern ambient reference high temperature, the state of charge of the battery is less than the preset southern reference battery state of charge value in the cooling mode, and according to the preset cooling mode threshold mapping table, the seventh battery thermal management cooling strategy is executed;

[0093] S480. When it is determined that the location of the vehicle is in the south, the battery thermal management mode enters the cooling mode, and it is detected that the local ambient temperature is greater than the preset southern ambient reference high temperature, the state of charge of the battery is greater than the preset southern reference battery state of charge value in the cooling mode, and according to the preset cooling mode threshold mapping table, the eighth battery thermal management cooling strategy is executed.

[0094] Preferably, in another embodiment of the present application, when it is determined the location of the vehicle and the battery thermal management mode, and then combined with the local ambient temperature and the state of charge of the battery, different battery thermal management heating strategies are executed;

[0095] The proportion of low-temperature weather in the north is much larger than that in the south. To balance the relationship between the service life of the battery and the driving energy consumption, it is necessary to match different heating strategies according to the local ambient temperature. The local ambient temperature Tamb for distinguishing different heating strategies in the north is generally the preset ambient reference low temperature TBD7-0 ± 3°C, and the corresponding preset ambient reference low temperature TBD6 in the south is generally 3-5°C lower than TBD7.

[0096] The preset northern reference battery state of charge value SOC TBD9 for the heating mode in the north to distinguish different heating strategies is generally 35%-40%, and the corresponding preset southern reference battery state of charge value SOC TBD8 in the south is generally 5%-10% higher than TBD9; see Figure 3 As shown, according to the location of the vehicle, the current ambient temperature, and the state of charge of the battery, the driving battery thermal management heating strategy can be divided into 8 modes;

[0097] Specifically, the steps of "S320. When it is detected that the temperature of the vehicle battery matches the preset battery reference low temperature, it is determined that the battery thermal management mode enters the heating mode; S400. Based on the location of the vehicle and the battery thermal management mode, and according to the local ambient temperature and the state of charge of the battery, a preset heating mode threshold mapping table is used to execute different battery thermal management heating strategies" specifically include the following steps:

[0098] S401. When it is determined that the location of the vehicle is in the north, the battery thermal management mode enters the heating mode, and it is detected that the local ambient temperature is lower than the preset northern ambient reference low temperature, the state of charge of the battery is greater than the preset northern reference battery state of charge value for the heating mode, and according to the preset heating mode threshold mapping table, the first battery thermal management heating strategy is executed;

[0099] S402. When it is determined that the location of the vehicle is in the north, the battery thermal management mode enters the heating mode, and it is detected that the local ambient temperature is lower than the preset northern ambient reference low temperature, the state of charge of the battery is less than the preset northern reference battery state of charge value for the heating mode, and according to the preset heating mode threshold mapping table, the second battery thermal management heating strategy is executed;

[0100] S403. When it is determined that the location of the vehicle is in the north, the battery thermal management mode enters the heating mode, and it is detected that the local ambient temperature is higher than the preset northern ambient reference low temperature, the state of charge of the battery is less than the preset northern reference battery state of charge value for the heating mode, and according to the preset heating mode threshold mapping table, the third battery thermal management heating strategy is executed;

[0101] S404. When it is determined that the location of the vehicle is in the north, the battery thermal management mode enters the heating mode, and it is detected that the local ambient temperature is higher than the preset northern ambient reference low temperature, the state of charge of the battery is greater than the preset northern reference battery state of charge value for the heating mode, and according to the preset heating mode threshold mapping table, the fourth battery thermal management heating strategy is executed;

[0102] S405. When it is determined that the location of the vehicle is in the south, the battery thermal management mode enters the heating mode, and it is detected that the local ambient temperature is higher than the preset southern ambient reference low temperature, the state of charge of the battery is greater than the preset southern reference battery state of charge value for the heating mode, and according to the preset heating mode threshold mapping table, the fifth battery thermal management heating strategy is executed;

[0103] S406. When it is determined that the location of the vehicle is in the south, the battery thermal management mode enters the heating mode, and it is detected that the local ambient temperature is higher than the preset southern ambient reference low temperature, the state of charge of the battery is less than the preset southern reference battery state of charge value for the heating mode, and according to the preset heating mode threshold mapping table, the sixth battery thermal management heating strategy is executed;

[0104] S407. When it is determined that the location of the vehicle is in the south, the battery thermal management mode enters the heating mode, and it is detected that the local ambient temperature is lower than the preset southern ambient reference low temperature, the state of charge of the battery is less than the preset southern reference battery state of charge value for the heating mode, and according to the preset heating mode threshold mapping table, the seventh battery thermal management heating strategy is executed;

[0105] S408, when it is determined that the location of the vehicle is in the south, the battery thermal management mode enters the heating mode, and it is detected that the local ambient temperature is lower than the preset southern ambient reference low temperature, the battery state of charge is greater than the preset southern reference battery charge value of the heating mode, and according to the preset heating mode threshold mapping table, the eighth battery thermal management heating strategy is executed. Preferably, in another embodiment of the present application, the "battery thermal management cooling strategy" step specifically includes the following steps:

[0106] Level 1: when it is detected that the current battery temperature is greater than or equal to the first preset entry temperature threshold and less than the second preset entry temperature threshold, the maximum battery temperature is controlled to be less than or equal to the first preset exit temperature threshold, and the first coolant target inlet information is set;

[0107] Level 2: when it is detected that the current battery temperature is greater than or equal to the second preset entry temperature threshold and less than the third preset entry temperature threshold, the battery maximum temperature is controlled to be less than or equal to the second preset exit temperature threshold, and the second coolant target inlet information is set;

[0108] Level three, when it is detected that the current battery temperature is greater than or equal to the third preset entry temperature threshold, the battery maximum temperature is controlled to be less than or equal to the third preset exit temperature threshold, and the third coolant target inlet information is set.

[0109] Specifically, in this embodiment, since each of the eight battery thermal management cooling strategies is relatively similar, each battery thermal management cooling strategy can be divided into three levels, Level 1 Level ①, Level 2 Level ②, and Level 3 Level ③, see Figure 4 As shown, T1_in, T2_in, and T3_in correspond to the first preset entry temperature threshold, the second preset entry temperature threshold, and the third preset entry temperature threshold when entering Level①, Level②, and Level③, respectively; T1_out, T2_out, and T3_out correspond to the first preset exit temperature threshold, the second preset exit temperature threshold, and the first preset exit temperature threshold when exiting Level①, Level②, and Level③, respectively; the cooling level is from slight-middle-urgent, and the cooling level entry or exit is gradually progressive and cannot be skipped; Tmax is the maximum temperature of the battery, T 当 is the current battery temperature.

[0110] The coolant target inlet information includes the coolant target inlet temperature and the coolant target inlet flow rate. Therefore, Twater1, Twater2, and Twater3 are the coolant target inlet temperatures corresponding to Level①, Level②, and Level③ respectively; the coolant target inlet flow rate is N L / min. Under normal circumstances, N is a fixed value under different cooling modes, and generally N is taken as 20±5.

[0111] See Table 1 below, which is the preset cooling mode threshold mapping table - recommended thresholds for eight battery thermal management cooling strategies;

[0112]

[0113] Table (1)

[0114] Interpretation of Table 1

[0115] I. Taking one year as a cycle, the proportion of days with high temperature in the north is much lower than that in the south, and the vehicle's heat dissipation environment is better. Under the same other conditions, the driving cooling start temperature in the north is 2°C higher than that in the south, which not only ensures the battery service life but also reduces energy consumption. Comparing Cooling Strategy 1 and Cooling Strategy 8, Cooling Strategy 2 and Cooling Strategy 7, Cooling Strategy 3 and Cooling Strategy 6, Cooling Strategy 4 and Cooling Strategy 5: The thresholds for entering and exiting Level① and Level② in the north are 2°C higher than those in the south, the thresholds for entering and exiting Level③ in the north and the south are the same, Twater1 in the south and the north is the same, and Twater2 and Twater3 in the north are 2°C higher than those in the south.

[0116] II. The ambient temperature is also an important factor affecting vehicle heat dissipation. Under the same other conditions, the driving cooling starts earlier when the ambient temperature is higher, which not only ensures that the available power of the vehicle is not limited but also does not affect the battery life. Comparing Cooling Strategy 1 and Cooling Strategy 4, Cooling Strategy 2 and Cooling Strategy 3, Cooling Strategy 5 and Cooling Strategy 8, Cooling Strategy 6 and Cooling Strategy 7: The driving cooling start and stop thresholds are both 2°C lower when the ambient temperature is higher, and Twater1, Twater2, and Twater3 are all the same.

[0117] III. SOC is directly related to the available power and available energy of the vehicle. Under the same other conditions, the driving cooling starts later when the SOC is lower, which not only ensures that the available power of the vehicle is not limited but also can extend the vehicle's cruising range. Comparing Cooling Strategy 2 and Cooling Strategy 1, Cooling Strategy 3 and Cooling Strategy 4, Cooling Strategy 7 and Cooling Strategy 8, Comparing Cooling Strategy 6 and Cooling Strategy 5: The driving cooling start and stop thresholds are both 2°C higher when the SOC is lower, Twater1 and Twater2 are the same, and Twater3 is 2°C higher when the SOC is lower.

[0118] Preferably, in another embodiment of the present application, the step of "battery thermal management heating strategy" specifically includes the following steps:

[0119] Level ④, when it is detected that the current battery temperature is greater than or equal to the fifth preset entry temperature threshold and less than the fourth preset entry temperature threshold, then control the minimum battery temperature to be greater than or equal to the fourth preset exit temperature threshold, and set the fourth coolant target inlet information;

[0120] Level ⑤, when it is detected that the current battery temperature is less than the fifth preset entry temperature threshold, then control the minimum battery temperature to be greater than or equal to the fifth preset exit temperature threshold, and set the fifth coolant target inlet information.

[0121] Specifically, in this embodiment, since each heating strategy of the eight battery thermal management heating strategies is relatively similar, each battery thermal management heating strategy can be divided into two levels, Level ④ and Level ⑤. The heating level ranges from slight - urgent, and the entry or exit of the heating level is progressive and cannot skip levels; see Figure 5 As shown, where T4_in and T5_in correspond to the fourth preset entry temperature threshold and the fifth preset entry temperature threshold at the entry of Level ④ and Level ⑤ respectively, and T4_out and T5_out correspond to the fourth preset exit temperature threshold and the fifth preset exit temperature threshold at the exit of Level ④ and Level ⑤ respectively; Tmin is the minimum battery temperature, and T 当 is the current battery temperature; Twater4 and Twater5 are the coolant target inlet temperatures of Level ④ and Level ⑤ respectively. The coolant target inlet flow rate is ML / min. Usually, M is a fixed value under different heating modes, and generally M takes 20 ± 5.

[0122] See Table 2 below, which is the preset heating mode threshold mapping table - recommended thresholds for eight battery thermal management heating strategies;

[0123] Heating mode T4_in T5_in T4_out T5_out Twater4 Twater5 Heating strategy 1 0℃ -12℃ 5℃ -10℃ 30℃ 40℃ Heating strategy 2 -3℃ -12℃ 2℃ -10℃ 30℃ 38℃ Heating strategy 3 -5℃ -12℃ 0℃ -10℃ 30℃ 38℃ Heating strategy 4 -3℃ -12℃ 2℃ -10℃ 30℃ 40℃ Heating strategy 5 -5℃ -12℃ 0℃ -10℃ 28℃ 38℃ Heating strategy 6 -9℃ -12℃ -4℃ -10℃ 28℃ 36℃ Heating strategy 7 -7℃ -12℃ -2℃ -10℃ 28℃ 36℃ Heating strategy 8 -3℃ -12℃ 2℃ -10℃ 28℃ 38℃

[0124] Table (2)

[0125] Interpretation of Table 2

[0126] I. Similar to driving cooling, with a one-year cycle, the proportion of days with low temperature in the south is much lower than that in the north, and the vehicle insulation environment is better. Under the same other conditions, the starting temperature of driving heating in the south is 2-4°C lower than that in the north, which not only ensures the service life of the battery but also reduces energy consumption. Comparing heating strategy 1 and heating strategy 8, heating strategy 2 and heating strategy 7, heating strategy 3 and heating strategy 6, heating strategy 4 and heating strategy 5: The thresholds for entering and exiting Level ④ in the south are 2-4°C lower than those in the north, the thresholds for entering and exiting Level ⑤ in the south and the north are the same, Twater4 in the south is 2°C lower than that in the north, and Twater5 in the south is 2°C lower than that in the north.

[0127] II. Ambient temperature is also an important factor affecting vehicle insulation. Under the same other conditions, driving heating starts earlier when the ambient temperature is lower, which not only ensures that the available power of the vehicle is not limited but also does not affect the battery life. Comparing heating strategy 1 and heating strategy 4, heating strategy 2 and heating strategy 3, heating strategy 5 and heating strategy 8, heating strategy 6 and heating strategy 7: The starting and closing thresholds of driving heating are both 2-3°C higher when the ambient temperature is lower, and Twater4 and Twater5 remain the same.

[0128] III. SOC is directly related to the available power and available energy of the vehicle. Under the same other conditions, driving heating starts later when SOC is lower, which not only ensures that the available power of the vehicle is not limited but also can extend the driving range of the vehicle. Comparing heating strategy 2 and heating strategy 1, heating strategy 3 and heating strategy 4, heating strategy 7 and heating strategy 8, comparing heating strategy 6 and heating strategy 5: The starting and closing thresholds of driving heating are both 2-4°C lower when SOC is lower, Twater4 remains the same, and Twater5 is 2°C lower when SOC is lower.

[0129] Preferably, in another embodiment of the present application, before the step of "S400, based on the location of the vehicle and the battery thermal management mode, and according to the local ambient temperature and the state of charge of the battery, preset a cooling mode threshold mapping table or a heating mode threshold mapping table, and respectively execute different battery thermal management cooling strategies or different battery thermal management heating strategies", the following steps are specifically included:

[0130] S500, determine the type of the driver's driving habit;

[0131] S510, when it is determined that the type of the driving habit is an aggressive type, then match the battery thermal management cooling strategy or the battery thermal management heating strategy in the sport mode of the vehicle;

[0132] S520, when it is determined that the type of the driving habit is a comfortable and normal type, then match the battery thermal management cooling strategy or the battery thermal management heating strategy in the comfort mode of the vehicle;

[0133] For S530, when it is determined that the driving habit type is the economic type, the battery thermal management cooling strategy or the battery thermal management heating strategy in the vehicle's eco mode is matched.

[0134] Specifically, in this embodiment, the specific threshold settings of the above eight battery thermal management cooling strategies and the specific threshold settings of the eight battery thermal management heating strategies are all matched based on the vehicle being in the comfort mode.

[0135] In the cooling strategy, when the vehicle is in the eco mode, under the same conditions, the preset entry temperature threshold and the preset exit temperature threshold for driving cooling should be increased by 1 - 2 °C respectively compared to those in the comfort mode, and the target inlet temperature of the coolant should also be increased by 1 - 2 °C compared to that in the comfort mode. When the vehicle is in the sport mode, under the same conditions, the preset entry temperature threshold and the preset exit temperature threshold for driving cooling should be decreased by 1 - 2 °C respectively compared to those in the comfort mode, and the target inlet temperature of the coolant should also be decreased by 1 - 2 °C compared to that in the comfort mode. Additionally, according to big data statistics, the driving habit of the user can be judged. When the user's driving habit is judged to be relatively aggressive, the battery management system BMS will adaptively match the driving cooling strategy in the sport mode; when the user's driving habit is judged to be relatively economical, BMS will adaptively match the driving cooling strategy in the eco mode.

[0136] In the heating strategy, when the vehicle is in the eco mode, under the same conditions, the preset entry temperature threshold and the preset exit temperature threshold for driving heating should be decreased by 1 - 2 °C respectively compared to those in the comfort mode, and the target inlet temperature of the coolant should also be decreased by 3 - 5 °C compared to that in the comfort mode. When the vehicle is in the sport mode, under the same conditions, the preset entry temperature threshold and the preset exit temperature threshold for driving heating should be increased by 1 - 2 °C respectively compared to those in the comfort mode, and the target inlet temperature of the coolant should also be increased by 3 - 5 °C compared to that in the comfort mode. Additionally, according to big data statistics, the driving habit of the user can be judged. When the user's driving habit is judged to be relatively aggressive, BMS will adaptively match the driving heating strategy in the sport mode; when the user's driving habit is judged to be relatively economical, BMS will adaptively match the driving heating strategy in the eco mode.

[0137] Therefore, the present invention intelligently matches the cooling or heating strategies in different modes according to factors such as the geographical location of the vehicle, the local temperature, the current SOC of the vehicle, and the driving habit of the user, improving the driving experience, optimizing the vehicle energy consumption, and prolonging the service life of the battery.

[0138] See Figure 6As shown in the figure, an intelligent battery thermal management control system 100 for an electric vehicle provided by an embodiment of the present invention includes: a vehicle information acquisition module 110, a geographical location judgment module 120, a mode judgment module 130, a cooling and heating strategy module 140, and a driving habit type module 150;

[0139] The vehicle information acquisition module 110 is configured to acquire the vehicle geographical latitude, local ambient temperature, vehicle battery temperature, and state of charge of the battery of the vehicle;

[0140] The geographical location judgment module 120 is communicatively connected to the vehicle information acquisition module 110, and is configured to judge whether the location where the vehicle is located is in the north or the south according to the vehicle geographical latitude;

[0141] The mode judgment module 130 is communicatively connected to the vehicle information acquisition module 110, and is configured to judge whether the battery thermal management mode enters the cooling mode or the heating mode according to the vehicle battery temperature;

[0142] The cooling and heating strategy module 140 is communicatively connected to the vehicle information acquisition module 110, the geographical location judgment module 120, and the mode judgment module 130, and is configured to preset a cooling mode threshold mapping table or a heating mode threshold mapping table based on the location of the vehicle and the battery thermal management mode, and according to the local ambient temperature and the state of charge of the battery, and respectively execute different battery thermal management cooling strategies or different battery thermal management heating strategies.

[0143] It further includes:

[0144] The driving habit type module 150 is communicatively connected to the cooling and heating strategy module 140, and is configured to judge the type of driving habit of the driver; when it is judged that the type of driving habit is an aggressive type, then match the battery thermal management cooling strategy or the battery thermal management heating strategy in the sport mode of the vehicle; when it is judged that the type of driving habit is a comfortable and normal type, then match the battery thermal management cooling strategy or the battery thermal management heating strategy in the comfort mode of the vehicle; when it is judged that the type of driving habit is an economic type, then match the battery thermal management cooling strategy or the battery thermal management heating strategy in the eco mode of the vehicle.

[0145] Specifically, the specific implementation processes of the respective functional modules in this embodiment have been described in detail in the corresponding method embodiments above, and will not be elaborated one by one here.

[0146] For the solution designed by the present invention, the present invention first obtains the vehicle geographical latitude, local ambient temperature, vehicle battery temperature, and state of charge of the battery of the vehicle; determines whether the location of the vehicle is in the north or south according to the vehicle geographical latitude; determines whether the battery thermal management mode enters the cooling mode or the heating mode according to the vehicle battery temperature; finally, based on the location of the vehicle and the battery thermal management mode, and according to the local ambient temperature and the state of charge of the battery, a preset cooling mode threshold mapping table and a preset heating mode threshold mapping table are preset, and different battery thermal management cooling strategies and different battery thermal management heating strategies are respectively executed; therefore, the present invention monitors the vehicle geographical latitude of the vehicle through a big data platform, judges the change of the ambient temperature at the geographical location where the vehicle is located, and at the same time takes into account the state of charge of the battery SOC (State of Charge), and also takes into account factors such as the user's driving habits, and matches and executes different battery thermal management cooling strategies or different battery thermal management heating strategies, so as to improve the battery working efficiency, ensure both the sufficient power performance of the vehicle and greatly reduce the energy consumption, and extend the service life of the battery cells.

[0147] Based on the same inventive concept, an embodiment of the present application further provides a computer-readable storage medium, on which a computer program is stored, and when the computer program is executed by a processor, all or part of the method steps of the above method are implemented.

[0148] All or part of the processes of the above method implemented by the present invention can also be completed by instructing relevant hardware through a computer program. The computer program can be stored in a computer-readable storage medium. When the computer program is executed by a processor, the steps of the above method embodiments can be implemented. Among them, the computer program includes computer program code, and the computer program code can be in the form of source code, object code, executable file or some intermediate form, etc. The computer-readable medium can include: any entity or device capable of carrying the computer program code, recording medium, USB flash drive, mobile hard disk, magnetic disk, optical disk, computer memory, read-only memory (ROM, Read-Only Memory), random access memory (RAM, Random Access Memory), electrical carrier signal, telecommunication signal, and software distribution medium, etc. It should be noted that the content included in the computer-readable medium can be appropriately increased or decreased according to the requirements of legislation and patent practice in the jurisdiction. For example, in some jurisdictions, according to legislation and patent practice, the computer-readable medium does not include electrical carrier signals and telecommunication signals.

[0149] Based on the same inventive concept, an embodiment of the present application further provides an electronic device, including a memory and a processor. A computer program is stored on the memory and runs on the processor. When the processor executes the computer program, all or part of the method steps of the above method are implemented.

[0150] The so-called processor may be a Central Processing Unit (CPU), or may also be other general-purpose processors, Digital Signal Processors (DSPs), Application Specific Integrated Circuits (ASICs), Field-Programmable Gate Arrays (FPGAs), or other programmable logic devices, discrete gate or transistor logic devices, discrete hardware components, etc. The general-purpose processor may be a microprocessor or the processor may also be any conventional processor, etc. The processor is the control center of the computer device, and connects various parts of the entire computer device through various interfaces and lines.

[0151] The memory can be used to store computer programs and / or models. The processor realizes various functions of the computer device by running or executing the computer programs and / or models stored in the memory, and by calling the data stored in the memory. The memory mainly includes a program storage area and a data storage area. Among them, the program storage area can store an operating system and application programs required for at least one function (such as a sound playback function, an image playback function, etc.); the data storage area can store data created according to the use of the mobile phone (such as audio data, video data, etc.). In addition, the memory may include high-speed random access memory, and may also include non-volatile memory, such as a hard disk, a memory, a plug-in hard disk, a SmartMedia Card (SMC), a Secure Digital (SD) card, a Flash Card, at least one magnetic disk storage device, a flash memory device, or other volatile solid-state storage devices.

[0152] Those skilled in the art should understand that the embodiments of the present invention can be provided as a method, a system, a server, or a computer program product. Therefore, the present invention can take the form of a completely hardware embodiment, a completely software embodiment, or an embodiment combining software and hardware aspects. Moreover, the present invention can take the form of a computer program product implemented on one or more computer-usable storage media (including but not limited to magnetic disk memories and optical memories, etc.) that contain computer-usable program code.

[0153] The present invention is described with reference to the flowcharts and / or block diagrams of methods, apparatus (systems), servers, and computer program products according to embodiments of the present invention. It should be understood that each flow and / or block in the flowcharts and / or block diagrams, as well as the combination of flows and / or blocks in the flowcharts and / or block diagrams, can be implemented by computer program instructions. These computer program instructions can be provided to the processors of general-purpose computers, special-purpose computers, embedded processors, or other programmable data processing devices to generate a machine, such that the instructions executed by the processors of the computer or other programmable data processing devices produce means for implementing the functions specified in one or more of the flows Figure 1 one or more of the flows and / or blocks Figure 1 or means for implementing the functions specified in one or more of the blocks.

[0154] These computer program instructions can also be stored in a computer-readable memory that can direct a computer or other programmable data processing device to operate in a specific manner, such that the instructions stored in the computer-readable memory produce a manufactured article including instruction means that implement the functions specified in one or more of the flows Figure 1 one or more of the flows and / or blocks Figure 1 or means for implementing the functions specified in one or more of the blocks.

[0155] These computer program instructions can also be loaded onto a computer or other programmable data processing device, such that a series of operational steps are performed on the computer or other programmable device to generate a computer-implemented process, and thus the instructions executed on the computer or other programmable device provide steps for implementing the functions specified in one or more of the flows Figure 1 one or more of the flows and / or blocks Figure 1 or means for implementing the functions specified in one or more of the blocks.

[0156] Obviously, those skilled in the art can make various modifications and variations to the present invention without departing from the spirit and scope of the present invention. Thus, if these modifications and variations of the present invention fall within the scope of the claims of the present invention and their equivalent technologies, the present invention is also intended to include these modifications and variations.

Claims

1. An intelligent battery thermal management control method for an electric vehicle, characterized in that, The steps include the following: Obtain the vehicle's geographical latitude, local ambient temperature, vehicle battery temperature, and state of charge of the battery; Based on the vehicle's geographical latitude, determine whether the location of the vehicle is in the north or the south; Based on the vehicle battery temperature, determine whether the battery thermal management mode enters the cooling mode or the heating mode; Based on the location of the vehicle and the battery thermal management mode, and according to the local ambient temperature and the state of charge of the battery, preset a cooling mode threshold mapping table or a heating mode threshold mapping table, and respectively execute different battery thermal management cooling strategies or different battery thermal management heating strategies; where: When it is determined that the location of the vehicle is in the north, the battery thermal management mode enters the cooling mode, and it is detected that the local ambient temperature is greater than the preset northern environmental reference high temperature, and the state of charge of the battery is greater than the preset northern reference battery charge value for the cooling mode, and according to the preset cooling mode threshold mapping table, the first battery thermal management cooling strategy is executed; When it is determined that the location of the vehicle is in the north, the battery thermal management mode enters the cooling mode, and it is detected that the local ambient temperature is greater than the preset northern environmental reference high temperature, and the state of charge of the battery is less than the preset northern reference battery charge value for the cooling mode, and according to the preset cooling mode threshold mapping table, the second battery thermal management cooling strategy is executed; When it is determined that the location of the vehicle is in the north, the battery thermal management mode enters the cooling mode, and it is detected that the local ambient temperature is less than the preset northern environmental reference high temperature, and the state of charge of the battery is less than the preset northern reference battery charge value for the cooling mode, and according to the preset cooling mode threshold mapping table, the third battery thermal management cooling strategy is executed; When it is determined that the location of the vehicle is in the north, the battery thermal management mode enters the cooling mode, and it is detected that the local ambient temperature is less than the preset northern environmental reference high temperature, and the state of charge of the battery is greater than the preset northern reference battery charge value for the cooling mode, and according to the preset cooling mode threshold mapping table, the fourth battery thermal management cooling strategy is executed; When it is determined that the location of the vehicle is in the south, the battery thermal management mode enters the cooling mode, and it is detected that the local ambient temperature is less than the preset southern environmental reference high temperature, and the state of charge of the battery is greater than the preset southern reference battery charge value for the cooling mode, and according to the preset cooling mode threshold mapping table, the fifth battery thermal management cooling strategy is executed; When it is determined that the location of the vehicle is in the south, the battery thermal management mode enters the cooling mode, and it is detected that the local ambient temperature is less than the preset southern environmental reference high temperature, and the state of charge of the battery is less than the preset southern reference battery charge value for the cooling mode, and according to the preset cooling mode threshold mapping table, the sixth battery thermal management cooling strategy is executed; When it is determined that the location of the vehicle is in the south, the battery thermal management mode enters the cooling mode, and it is detected that the local ambient temperature is greater than the preset southern environmental reference high temperature, and the state of charge of the battery is less than the preset southern reference battery charge value for the cooling mode, and according to the preset cooling mode threshold mapping table, the seventh battery thermal management cooling strategy is executed; When it is determined that the location of the vehicle is in the south, the battery thermal management mode enters the cooling mode, and it is detected that the local ambient temperature is greater than the preset southern ambient reference high temperature, the state of charge of the battery is greater than the preset southern reference battery state of charge value for the cooling mode, and according to the preset cooling mode threshold mapping table, the eighth battery thermal management cooling strategy is executed.

2. The intelligent battery thermal management control method for an electric vehicle according to claim 1, characterized in that The specific steps for determining whether the location of the vehicle is in the north or south according to the geographical latitude of the vehicle are as follows: When it is detected that the geographical latitude of the vehicle is greater than the preset reference latitude, it is determined that the location of the vehicle is in the north; When it is detected that the geographical latitude of the vehicle is less than the preset reference latitude, it is determined that the location of the vehicle is in the south.

3. The intelligent battery thermal management control method for an electric vehicle according to claim 1, wherein The specific steps for determining whether the battery thermal management mode enters the cooling mode or the heating mode according to the battery temperature of the vehicle are as follows: When it is detected that the battery temperature of the vehicle matches the preset battery reference high temperature, it is determined that the battery thermal management mode enters the cooling mode; When it is detected that the battery temperature of the vehicle matches the preset battery reference low temperature, it is determined that the battery thermal management mode enters the heating mode.

4. The intelligent battery thermal management control method for an electric vehicle according to claim 3, wherein When it is detected that the battery temperature of the vehicle matches the preset battery reference low temperature, it is determined that the battery thermal management mode enters the heating mode; based on the location of the vehicle and the battery thermal management mode, and according to the local ambient temperature and the state of charge of the battery, the specific steps for executing different battery thermal management heating strategies according to the preset heating mode threshold mapping table are as follows: When it is determined that the location of the vehicle is in the north, the battery thermal management mode enters the heating mode, and it is detected that the local ambient temperature is less than the preset northern ambient reference low temperature, the state of charge of the battery is greater than the preset northern reference battery state of charge value for the heating mode, and according to the preset heating mode threshold mapping table, the first battery thermal management heating strategy is executed; When it is determined that the location of the vehicle is in the north, the battery thermal management mode enters the heating mode, and it is detected that the local ambient temperature is less than the preset northern ambient reference low temperature, the state of charge of the battery is less than the preset northern reference battery state of charge value for the heating mode, and according to the preset heating mode threshold mapping table, the second battery thermal management heating strategy is executed; When it is determined that the location of the vehicle is in the north, the battery thermal management mode enters the heating mode, and it is detected that the local ambient temperature is greater than the preset northern ambient reference low temperature, the state of charge of the battery is less than the preset northern reference battery state of charge value for the heating mode, and according to the preset heating mode threshold mapping table, the third battery thermal management heating strategy is executed; When it is determined that the location of the vehicle is in the north, the battery thermal management mode enters the heating mode, and it is detected that the local ambient temperature is greater than the preset northern ambient reference low temperature, the state of charge of the battery is greater than the preset northern reference battery state of charge value for the heating mode, and according to the preset heating mode threshold mapping table, the fourth battery thermal management heating strategy is executed; When it is determined that the location of the vehicle is in the south, the battery thermal management mode enters the heating mode, and it is detected that the local ambient temperature is greater than the preset southern ambient reference low temperature, the state of charge of the battery is greater than the preset southern reference battery state of charge value for the heating mode, and according to the preset heating mode threshold mapping table, the fifth battery thermal management heating strategy is executed; When it is determined that the location of the vehicle is in the south, the battery thermal management mode enters the heating mode, and it is detected that the local ambient temperature is greater than the preset southern ambient reference low temperature, the state of charge of the battery is less than the preset southern reference battery state of charge value for the heating mode, and according to the preset heating mode threshold mapping table, the sixth battery thermal management heating strategy is executed; When it is determined that the location of the vehicle is in the south, the battery thermal management mode enters the heating mode, and it is detected that the local ambient temperature is less than the preset southern ambient reference low temperature, the state of charge of the battery is less than the preset southern reference battery state of charge value for the heating mode, and according to the preset heating mode threshold mapping table, the seventh battery thermal management heating strategy is executed; When it is determined that the location of the vehicle is in the south, the battery thermal management mode enters the heating mode, and it is detected that the local ambient temperature is less than the preset southern ambient reference low temperature, the state of charge of the battery is greater than the preset southern reference battery state of charge value for the heating mode, and according to the preset heating mode threshold mapping table, the eighth battery thermal management heating strategy is executed.

5. The intelligent battery thermal management control method for an electric vehicle according to claim 3, wherein The battery thermal management cooling strategy specifically includes the following steps: When it is detected that the current temperature of the battery is greater than or equal to the first preset entry temperature threshold and less than the second preset entry temperature threshold, the maximum temperature of the battery is controlled to be less than or equal to the first preset exit temperature threshold, and the first coolant target inlet information is set; When it is detected that the current temperature of the battery is greater than or equal to the second preset entry temperature threshold and less than the third preset entry temperature threshold, the maximum temperature of the battery is controlled to be less than or equal to the second preset exit temperature threshold, and the second coolant target inlet information is set; When it is detected that the current temperature of the battery is greater than or equal to the third preset entry temperature threshold, the maximum temperature of the battery is controlled to be less than or equal to the third preset exit temperature threshold, and the third coolant target inlet information is set.

6. The intelligent battery thermal management control method for an electric vehicle according to claim 3, characterized in that The battery thermal management heating strategy specifically includes the following steps: When it is detected that the current temperature of the battery is greater than or equal to the fifth preset entry temperature threshold and less than the fourth preset entry temperature threshold, the minimum temperature of the battery is controlled to be greater than or equal to the fourth preset exit temperature threshold, and the fourth coolant target inlet information is set; When it is detected that the current temperature of the battery is less than the fifth preset entry temperature threshold, the minimum temperature of the battery is controlled to be greater than or equal to the fifth preset exit temperature threshold, and the fifth coolant target inlet information is set.

7. The intelligent battery thermal management control method for an electric vehicle according to claim 1, wherein Before presetting the cooling mode threshold mapping table or the preset heating mode threshold mapping table based on the location of the vehicle and the battery thermal management mode, and according to the local ambient temperature and the state of charge of the battery, and respectively executing different battery thermal management cooling strategies or different battery thermal management heating strategies, the following steps are specifically included: Judge the type of the driver's driving habit; When it is determined that the driving habit type is the aggressive type, the battery thermal management cooling strategy or the battery thermal management heating strategy under the vehicle's sport mode is matched; When it is determined that the driving habit type is the comfortable and normal type, the battery thermal management cooling strategy or the battery thermal management heating strategy under the vehicle's comfort mode is matched; When it is determined that the driving habit type is the economic type, the battery thermal management cooling strategy or the battery thermal management heating strategy under the vehicle's economic mode is matched.

8. An electric vehicle intelligent battery thermal management control system adopting the electric vehicle intelligent battery thermal management control method according to any one of claims 1-7, characterized in that, It includes: A vehicle information acquisition module, configured to acquire the vehicle's geographical latitude, local ambient temperature, vehicle battery temperature, and state of charge of the battery; A geographical location judgment module, communicatively connected to the vehicle information acquisition module, configured to judge whether the location where the vehicle is located is in the north or the south according to the vehicle's geographical latitude; A mode judgment module, communicatively connected to the vehicle information acquisition module, configured to judge whether the battery thermal management mode enters the cooling mode or the heating mode according to the vehicle battery temperature; and, A cooling and heating strategy module, communicatively connected to the vehicle information acquisition module, the geographical location judgment module, and the mode judgment module, configured to preset a cooling mode threshold mapping table or a preset heating mode threshold mapping table based on the location where the vehicle is located and the battery thermal management mode, and respectively execute different battery thermal management cooling strategies or different battery thermal management heating strategies according to the local ambient temperature and the state of charge of the battery.

9. The intelligent battery thermal management control system for an electric vehicle according to claim 8, characterized in that, It further includes a driving habit type module, communicatively connected to the cooling and heating strategy module, configured to judge the driving habit type of the driver; when it is determined that the driving habit type is the aggressive type, the battery thermal management cooling strategy or the battery thermal management heating strategy under the vehicle's sport mode is matched; when it is determined that the driving habit type is the comfortable and normal type, the battery thermal management cooling strategy or the battery thermal management heating strategy under the vehicle's comfort mode is matched; when it is determined that the driving habit type is the economic type, the battery thermal management cooling strategy or the battery thermal management heating strategy under the vehicle's economic mode is matched.

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