Battery thermal management control method, controller, server and storage medium

Abstract

The invention provides a battery thermal management control method, a battery management controller, a cloud server and a readable storage medium. The method comprises the following steps: acquiring future working condition information of a vehicle according to network connection information; determining a future battery target temperature according to the future working condition information; whether the absolute value of the deviation between the current battery target temperature and the future battery target temperature is larger than a first preset deviation threshold value or not is judged; if yes, performing thermal management on the battery according to the future battery target temperature; and if not, performing thermal management on the battery according to the current battery target temperature. The working efficiency of battery thermal management can be improved in the transition process of the parking working condition and the driving working condition, and energy loss caused by excessive heating or cooling is reduced.

Description

Technical Field

[0001] The present invention relates to the field of vehicle control technology, and in particular to a battery thermal management control method, a battery management controller, a cloud server and a readable storage medium. Background Art

[0002] The performance of electric vehicle power batteries directly affects the performance and range of the entire vehicle. Currently, the operating temperature range of power batteries is relatively narrow and is greatly affected by the external ambient temperature. In addition, due to the limited space where the batteries are located, it is easy to cause uneven temperatures in various places, affecting the thermal safety of the batteries and the performance of the entire vehicle. Therefore, it is necessary to perform thermal management on the power batteries, that is, to perform necessary heating or cooling to control the battery temperature within a reasonable range.

[0003] Battery thermal management includes two main functions: high-temperature cooling and low-temperature heating. In actual use, it is necessary to judge and calculate according to different scenarios and external conditions to obtain reasonable cooling or heating requirements and timing, so as to achieve the purpose of effectively controlling battery temperature and reducing energy loss. In general, the cooling or heating requirements are mainly calculated based on the deviation between the collected battery module temperature and the set temperature limit, such as Figure 1 As shown, when the actual temperature exceeds the upper limit, the cooling mode is entered; when the actual temperature is lower than the lower limit, the heating mode is entered; when the actual temperature is between the upper and lower limits, the thermal management mode is not turned on; the demand intensity for cooling or heating is calculated in segments according to the size of the temperature deviation, that is, the greater the deviation, the greater the demand intensity.

[0004] In addition to demand calculation, the timing of cooling or heating is also critical, especially considering the complex and changeable operating conditions of the vehicle. Usually, the demand timing calculation is mainly done when parking for charging or driving for discharging, by real-time monitoring of battery module temperature, ambient temperature, battery charge and discharge current, battery charge and discharge power, vehicle speed and other signals. This type of real-time monitoring input signal is collected based on sensors installed on the battery or vehicle, and has the advantages of high accuracy and good real-time performance.

[0005] However, on-board sensors also have shortcomings. They cannot perceive future scenarios or changes in operating conditions. For example, they cannot predict future operating conditions during the transition process between parking conditions and driving conditions. In the scenario where charging is about to be completed and driving is about to be completed or charging is about to be stopped, since the on-board sensors cannot obtain signals to switch the cooling or heating mode, it will cause cooling or heating switching delays and excessive demand intensity, resulting in unnecessary energy loss.

[0006] It should be noted that the information disclosed in the background technology section of the invention is only intended to deepen the understanding of the general background technology of the invention, and should not be regarded as an admission or suggestion in any form that the information constitutes prior art already known to those skilled in the art. Summary of the invention

[0007] The object of the present invention is to provide a battery thermal management control method, a battery management controller, a cloud server and a readable storage medium, which can improve the battery thermal management efficiency during the transition process between parking conditions and driving conditions and reduce energy loss caused by excessive heating or cooling.

[0008] To achieve the above object, the present invention provides a battery thermal management control method, the control method comprising:

[0009] Obtain the vehicle's future operating condition information based on the network information;

[0010] Determining a future target battery temperature according to the future operating condition information;

[0011] Determining whether an absolute value of a deviation between a current battery target temperature and the future battery target temperature is greater than a first preset deviation threshold;

[0012] If yes, thermally managing the battery according to the future battery target temperature;

[0013] If not, thermal management is performed on the battery according to the current battery target temperature.

[0014] Optionally, the thermal management of the battery according to the future target battery temperature includes:

[0015] Determining whether an absolute value of a deviation between a current actual battery temperature and the future target battery temperature is greater than a second preset deviation threshold;

[0016] If so, controlling a thermal management actuator to heat or cool the battery according to the future battery target temperature;

[0017] If not, the thermal management actuator is controlled to stop heating or cooling the battery.

[0018] Optionally, controlling a thermal management actuator to heat or cool the battery according to the future battery target temperature includes:

[0019] Calculating the future heat demand of the battery according to the future target battery temperature and the current actual battery temperature;

[0020] Calculating a gradient value of a future thermal demand change of the battery according to the future thermal demand of the battery and a transition time of the vehicle from a current operating condition to a future operating condition;

[0021] The thermal management actuator is controlled to heat or cool the battery according to the future heat demand of the battery and the gradient value of the change in the future heat demand of the battery.

[0022] Optionally, controlling the thermal management actuator to heat or cool the battery according to the future battery target temperature further includes:

[0023] Determining a future battery demand mode according to the future battery target temperature and the current battery actual temperature;

[0024] The step of controlling the thermal management actuator to heat or cool the battery according to the future heat demand of the battery and the gradient value of the future heat demand change of the battery includes:

[0025] The thermal management actuator is controlled to heat or cool the battery according to the future demand mode of the battery, the future heat demand of the battery and the gradient value of the change of the future heat demand of the battery.

[0026] Optionally, determining the future battery demand mode according to the future battery target temperature and the current battery actual temperature includes:

[0027] If the current actual battery temperature is higher than the future target battery temperature and the absolute value of the deviation between the current actual battery temperature and the future target battery temperature is higher than the second preset deviation threshold, the future battery demand mode is determined as a future cooling mode;

[0028] If the current actual battery temperature is lower than the future target battery temperature and the absolute value of the deviation between the two is greater than the second preset deviation threshold, the future battery demand mode is determined as a future heating mode.

[0029] Optionally, controlling the thermal management actuator to heat or cool the battery according to the future demand mode of the battery, the future heat demand of the battery, and the future heat demand change gradient value of the battery includes:

[0030] The battery future demand mode, the battery future heat demand and the battery future heat demand change gradient value are sent to the vehicle controller or the thermal management controller in the form of a message, so that the vehicle controller or the thermal management controller controls the thermal management actuator to heat or cool the battery.

[0031] Optionally, the performing thermal management on the battery according to the current battery target temperature includes:

[0032] Calculating a current heat demand of the battery according to the current battery target temperature and the current actual battery temperature;

[0033] The thermal management actuator is controlled to heat or cool the battery according to the current thermal demand of the battery.

[0034] To achieve the above object, the present invention also provides a battery management controller, including a processor and a memory, wherein a computer program is stored in the memory, and when the computer program is executed by the processor, the battery thermal management control method described above is implemented.

[0035] In order to achieve the above object, the present invention further provides a cloud server, the cloud server comprising:

[0036] A future operating condition acquisition module, configured to acquire future operating condition information of the vehicle based on network connection information;

[0037] a target temperature determination module, configured to determine a future battery target temperature according to the future operating condition information;

[0038] a judgment module configured to judge whether an absolute value of a deviation between a current battery target temperature and the future battery target temperature is greater than a first preset deviation threshold;

[0039] a future thermal management module configured to perform thermal management on the battery according to the future battery target temperature when the absolute value of the deviation between the current battery target temperature and the future battery target temperature is greater than the first preset deviation threshold; and

[0040] The current thermal management module is configured to perform thermal management on the battery according to the current battery target temperature when the absolute value of the deviation between the current battery target temperature and the future battery target temperature is less than or equal to the first preset deviation threshold.

[0041] To achieve the above object, the present invention further provides a readable storage medium, wherein the readable storage medium stores a computer program, and when the computer program is executed by a processor, the battery thermal management control method described above is implemented.

[0042] Compared with the prior art, the battery thermal management control method, battery management controller, cloud server and readable storage medium provided by the present invention have the following beneficial effects:

[0043] The battery thermal management control method provided by the present invention obtains the future operating condition information of the vehicle according to the network connection information; then determines the future battery target temperature according to the future operating condition information; then determines whether the absolute value of the deviation between the current battery target temperature and the future battery target temperature is greater than a first preset deviation threshold; and when it is determined that the absolute value of the deviation between the current battery target temperature and the future battery target temperature is greater than the first preset deviation threshold, thermally manages the battery according to the future battery target temperature; when it is determined that the absolute value of the deviation between the current battery target temperature and the future battery target temperature is less than or equal to the first preset deviation threshold, thermally manages the battery according to the current battery target temperature. Therefore, the battery thermal management control method provided by the present invention can predict the upcoming working conditions in advance (i.e., obtain future working condition information) by making full use of the network information, so as to expand the information source of the battery thermal management calculation, and when the absolute value of the deviation between the current battery target temperature and the future battery target temperature determined based on the future working condition information is greater than the first preset deviation threshold, the future battery target temperature is used to perform thermal management on the battery, so that the current battery thermal demand can be gradually transitioned to the future battery thermal demand within the predicted future time period, and the battery thermal demand can be smoothly transitioned in the transition process between the parking condition and the driving condition, and the battery temperature can be optimized by starting or switching the thermal management mode earlier, so as to improve the battery thermal management efficiency in the transition process between the parking condition and the driving condition, and reduce the energy loss caused by excessive heating or cooling. In addition, the battery thermal management control method provided by the present invention does not need to increase additional hardware costs, and only needs to use the existing interface information on the vehicle equipped with the network information receiving function to achieve the effect of improving the battery thermal management efficiency and reducing the energy loss caused by excessive heating or cooling in the transition process between the parking condition and the driving condition.

[0044] Since the battery management controller, cloud server and readable storage medium provided by the present invention belong to the same inventive concept as the battery thermal management control method provided by the present invention, the battery management controller, cloud server and readable storage medium provided by the present invention at least have all the beneficial effects of the battery thermal management control method provided by the present invention. Therefore, for the relevant content about the beneficial effects of the battery management controller, cloud server and readable storage medium provided by the present invention, reference can be made to the relevant description of the beneficial effects of the battery thermal management control method provided by the present invention in the above text, and they will not be repeated here one by one. BRIEF DESCRIPTION OF THE DRAWINGS

[0045] Figure 1 This is a conventional battery thermal management flow chart;

[0046] Figure 2 A flow chart of a battery thermal management control method provided by one embodiment of the present invention;

[0047] Figure 3 An overall flow chart of a battery thermal management control method provided by one embodiment of the present invention;

[0048] Figure 4 A structural block diagram of a battery management controller provided in one embodiment of the present invention;

[0049] Figure 5 A structural block diagram of a cloud server provided in one embodiment of the present invention.

[0050] The reference numerals are described as follows:

[0051] Processor-110; Communication interface-120; Memory-130; Communication bus-140;

[0052] Future working condition acquisition module-210;

[0053] Target temperature determination module-220;

[0054] Judgment module-230;

[0055] Future thermal management module-240; judgment submodule-241; future thermal management control submodule-242; first calculation unit-2421; second calculation unit-2422; first control unit-2423; mode determination unit-2424;

[0056] Current thermal management module-250; third computing unit-251; second control unit-252. DETAILED DESCRIPTION

[0057] The following is a further detailed description of the battery thermal management control method, battery management controller, cloud server and readable storage medium proposed in the present invention in combination with the accompanying drawings and specific embodiments. According to the following description, the advantages and features of the present invention will be clearer. It should be noted that the drawings are in a very simplified form and use non-precise proportions, which are only used to conveniently and clearly assist in explaining the purpose provided by the present invention. In order to make the purposes, features and advantages of the present invention more obvious and easy to understand, please refer to the accompanying drawings. It should be noted that the structures, proportions, sizes, etc. illustrated in the drawings of this specification are only used to match the contents disclosed in the specification for people familiar with this technology to understand and read, and are not used to limit the limiting conditions for the implementation of the present invention. Any structural modification, change in proportional relationship or adjustment of size, when the effects and purposes that can be achieved by the present invention are the same or similar, should still fall within the scope of the technical content disclosed by the present invention.

[0058] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, the elements defined by the sentence "comprise a ..." do not exclude the existence of other identical elements in the process, method, article or device including the elements. The singular forms "a", "an" and "the" include plural objects, the term "or" is generally used in a sense including "and / or", the term "several" is generally used in a sense including "at least one", and the term "at least two" is generally used in a sense including "two or more". In addition, the terms "first", "second" and "third" are used for descriptive purposes only and are not to be understood as indicating or suggesting relative importance or implicitly indicating the number of the indicated technical features.

[0059] In addition, in the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine the different embodiments or examples described in this specification and the features of the different embodiments or examples, without contradiction.

[0060] For ease of understanding, before introducing the battery thermal management control method, battery management controller, cloud server and readable storage medium provided by the present invention, the research background of the present invention is briefly described.

[0061] As introduced in the background technology, in the scenario where charging is about to be completed and driving is about to begin, or charging is about to be stopped, since the vehicle-mounted sensor cannot obtain a signal to switch the cooling or heating mode, the cooling or heating switching will be delayed and the demand intensity will be too high, resulting in unnecessary energy loss. Since the battery charge and discharge switch is relatively frequent, it is not enough to calculate the battery thermal demand based only on the vehicle-mounted sensor information for the transition process between such parking conditions and driving conditions. Therefore, it is necessary to consider using more information to optimize the battery thermal demand calculation during the transition process between parking conditions and driving conditions.

[0062] With the rapid development of advanced automotive networking technology and vehicle-cloud integration technology, real-time sharing of vehicle information, cloud information and third-party service information is gradually being realized, so that upcoming working conditions can be predicted in advance, such as knowing that the vehicle is about to travel based on mobile phone APP information or knowing that it is about to stop for charging based on navigation information. This can expand the information source for battery thermal management calculations, no longer limited to on-board sensors, and use future working conditions obtained through networked information to determine battery thermal demand, use future target temperatures for cooling or heating calculations, and gradually transition from current demand to future demand within the predicted future time period to ensure that the state does not suddenly change and cause temperature control fluctuations, so that more accurate calculations can be made for the transition process between parking conditions and driving conditions.

[0063] Based on this, the core idea of ​​the present invention is to provide a battery thermal management control method, a battery management controller, a cloud server and a readable storage medium, which can improve the battery thermal management efficiency during the transition process between parking conditions and driving conditions and reduce energy loss caused by excessive heating or cooling.

[0064] It should be noted that the battery thermal management control method provided by the present invention can be applied to the battery management controller and cloud server provided by the present invention, and the battery management controller provided by the present invention can be applied to vehicles, and the vehicle can be but is not limited to a pure electric vehicle, a hybrid vehicle, etc.

[0065] To realize the above idea, the present invention provides a battery thermal management control method, please refer to Figure 2 , which is a flow chart of a battery thermal management control method provided by one embodiment of the present invention. Figure 2 As shown, the battery thermal management control method provided by the present invention includes the following steps:

[0066] Step S100: Obtain future operating condition information of the vehicle based on network connection information.

[0067] Step S200: Determine the future target battery temperature according to the future operating condition information.

[0068] Step S300, determining whether the absolute value of the deviation between the current battery target temperature and the future battery target temperature is greater than a first preset deviation threshold;

[0069] If the absolute value of the deviation between the current battery target temperature and the future battery target temperature is greater than a first preset deviation threshold, step S400 is executed to perform thermal management on the battery according to the future battery target temperature.

[0070] If the absolute value of the deviation between the current battery target temperature and the future battery target temperature is less than or equal to a first preset deviation threshold, step S500 is executed to perform thermal management on the battery according to the current battery target temperature.

[0071] Therefore, the battery thermal management control method provided by the present invention can predict the upcoming working conditions in advance (i.e., obtain future working condition information) by making full use of the network information, so as to expand the information source of the battery thermal management calculation, and when the absolute value of the deviation between the current battery target temperature and the future battery target temperature determined based on the future working condition information is greater than the first preset deviation threshold, the future battery target temperature is used to perform thermal management on the battery, so that the current battery thermal demand can be gradually transitioned to the future battery thermal demand within the predicted future time period, and the battery thermal demand can be smoothly transitioned in the transition process between the parking condition and the driving condition, and the battery temperature can be optimized by starting or switching the thermal management mode earlier, so as to improve the battery thermal management efficiency in the transition process between the parking condition and the driving condition, and reduce the energy loss caused by excessive heating or cooling. In addition, the battery thermal management control method provided by the present invention does not need to increase additional hardware costs, and only needs to use the existing interface information on the vehicle equipped with the network information receiving function to achieve the effect of improving the battery thermal management efficiency and reducing the energy loss caused by excessive heating or cooling in the transition process between the parking condition and the driving condition.

[0072] Specifically, it is possible to know when the vehicle will travel or when it will stop for charging (i.e., to know that the vehicle is about to travel or stop for charging) based on the mobile phone reservation information or navigation information, thereby obtaining the vehicle's future operating condition information. It should be noted that, as those skilled in the art will understand, the battery target temperatures of the vehicle under the operating conditions of driving and discharging and parking and charging are pre-set, so the future battery target temperature can be determined based on the vehicle's future operating condition information obtained through network connection information. It should also be noted that, as those skilled in the art will understand, the present invention does not limit the specific value of the first preset deviation threshold, and the specific value of the first preset deviation threshold can be set according to actual needs.

[0073] In some exemplary embodiments, the thermal management of the battery according to the future battery target temperature includes:

[0074] Determining whether an absolute value of a deviation between a current actual battery temperature and the future target battery temperature is greater than a second preset deviation threshold;

[0075] If so, controlling a thermal management actuator to heat or cool the battery according to the future battery target temperature;

[0076] If not, the thermal management actuator is controlled to stop heating or cooling the battery.

[0077] Thus, by controlling the thermal management actuator to heat or cool the battery according to the future battery target temperature when the absolute value of the deviation between the current battery target temperature and the future battery target temperature is greater than the first preset deviation threshold and the absolute value of the deviation between the current battery actual temperature and the future battery target temperature is greater than the second preset deviation threshold, the thermal management mode can be turned on or switched in advance to optimize the battery temperature, thereby improving the battery thermal management efficiency during the transition between parking conditions and driving conditions, and reducing energy loss caused by excessive heating or cooling. By controlling the thermal management actuator to stop heating or cooling the battery when the absolute value of the deviation between the current battery target temperature and the future battery target temperature is greater than the first preset deviation threshold and the absolute value of the deviation between the current battery actual temperature and the future battery target temperature is less than or equal to the second preset deviation threshold, it can help reduce energy loss caused by excessive heating or cooling.

[0078] Specifically, the thermal management actuator may include but is not limited to a water pump, a water valve, a PTC (positive temperature coefficient) heater, a compressor, a cooling fan, etc. If the compressor is a heat pump air conditioning system compressor, the compressor can be used to heat the battery as well as cool the battery; if the compressor is a non-heat pump air conditioning system compressor, the compressor can only be used to cool the battery.

[0079] It should be noted that, as those skilled in the art can understand, the current actual battery temperature can be monitored by an on-board sensor. It should also be noted that, as those skilled in the art can understand, the present invention does not limit the specific value of the second preset deviation threshold, and the specific value of the second preset deviation threshold can be set according to actual needs.

[0080] In some exemplary embodiments, controlling a thermal management actuator to heat or cool the battery according to the future battery target temperature includes:

[0081] Calculating the future heat demand of the battery according to the future target battery temperature and the current actual battery temperature;

[0082] Calculating a gradient value of a future thermal demand change of the battery according to the future thermal demand of the battery and a transition time of the vehicle from a current operating condition to a future operating condition;

[0083] The thermal management actuator is controlled to heat or cool the battery according to the future heat demand of the battery and the gradient value of the change in the future heat demand of the battery.

[0084] Therefore, by calculating the gradient value of the battery's future thermal demand change according to the battery's future thermal demand and the transition time of the vehicle from the current operating condition to the future operating condition, and controlling the thermal management actuator to heat or cool the battery according to the battery's future thermal demand and the battery's future thermal demand change gradient value, a smooth change in battery temperature can be achieved during the transition between parking conditions and driving conditions, ensuring that the battery state will not change suddenly, thereby avoiding the problem of battery temperature control fluctuations.

[0085] Specifically, the gradient value of the battery's future thermal demand change Q fgrd = Future thermal demand of batteries Q f / Transition time Δt.

[0086] Furthermore, for specific details on how to calculate the future heat demand of the battery based on the future battery target temperature and the current actual battery temperature, reference may be made to relevant contents in the field of battery thermal management technology known to those skilled in the art, and will not be elaborated herein.

[0087] In some exemplary embodiments, controlling the thermal management actuator to heat or cool the battery according to the future battery target temperature further includes:

[0088] A future battery demand mode is determined according to the future battery target temperature and the current battery actual temperature.

[0089] Correspondingly, controlling the thermal management actuator to heat or cool the battery according to the future heat demand of the battery and the gradient value of the future heat demand change of the battery includes:

[0090] The thermal management actuator is controlled to heat or cool the battery according to the future demand mode of the battery, the future heat demand of the battery and the gradient value of the change of the future heat demand of the battery.

[0091] Therefore, by determining the future demand pattern of the battery based on the future battery target temperature and the current actual battery temperature, it is easy to determine whether the battery needs to be heated or cooled, which can help to more accurately manage the thermal performance of the battery during the transition between parking conditions and driving conditions.

[0092] In some exemplary embodiments, determining the future battery demand mode according to the future battery target temperature and the current battery actual temperature includes:

[0093] If the current actual battery temperature is higher than the future target battery temperature and the absolute value of the deviation between the current actual battery temperature and the future target battery temperature is higher than the second preset deviation threshold, the future battery demand mode is determined as a future cooling mode;

[0094] If the current actual battery temperature is lower than the future target battery temperature and the absolute value of the deviation between the two is greater than the second preset deviation threshold, the future battery demand mode is determined as a future heating mode.

[0095] Thus, by determining the battery future demand mode as the future cooling mode when the current actual battery temperature is higher than the future battery target temperature and the absolute value of the deviation between the two is greater than the second preset deviation threshold, the battery future demand mode can be optimized in advance by cooling the battery during the transition between the parking condition and the driving condition; by determining the battery future demand mode as the future heating mode when the current actual battery temperature is lower than the future battery target temperature and the absolute value of the deviation between the two is greater than the second preset deviation threshold, the battery future demand mode can be optimized in advance by heating the battery during the transition between the parking condition and the driving condition.

[0096] In some exemplary embodiments, controlling the thermal management actuator to heat or cool the battery according to the future demand mode of the battery, the future heat demand of the battery, and the future heat demand change gradient value of the battery includes:

[0097] The battery future demand mode, the battery future heat demand and the battery future heat demand change gradient value are sent to the vehicle controller or the thermal management controller in the form of a message, so that the vehicle controller or the thermal management controller controls the thermal management actuator to heat or cool the battery.

[0098] Specifically, when the battery future demand mode is a future cooling mode, the vehicle controller or thermal management controller can control the water pump, water valve, compressor, cooling fan and other thermal management actuators to perform corresponding actions according to the battery future heat demand and the battery future heat demand change gradient value to cool the battery; when the battery future demand mode is a future heating mode, the vehicle controller or thermal management controller can control the water pump, water valve, PTC (positive temperature coefficient) heater, heat pump air conditioning system compressor and other thermal management actuators to perform corresponding actions according to the battery future heat demand and the battery future heat demand change gradient value to heat the battery. It should be noted that, as can be understood by those skilled in the art, the battery management controller can send the battery future demand mode, the battery future heat demand and the battery future heat demand change gradient value in the form of a message to the vehicle controller or thermal management controller via the CAN bus.

[0099] In some exemplary embodiments, the thermal management of the battery according to the current battery target temperature includes:

[0100] Calculating a current heat demand of the battery according to the current battery target temperature and the current actual battery temperature; and

[0101] The thermal management actuator is controlled to heat or cool the battery according to the current thermal demand of the battery.

[0102] Specifically, when the current actual battery temperature is lower than the current target battery temperature, the vehicle controller or the thermal management controller may control the thermal management actuators such as the water pump, the water valve, the PTC (positive temperature coefficient) heater or the heat pump air conditioning system compressor to perform corresponding actions according to the current heat demand of the battery to heat the battery; when the current actual battery temperature is higher than the current target battery temperature, the vehicle controller or the thermal management controller may control the thermal management actuators such as the water pump, the water valve, the compressor, the cooling fan to perform corresponding actions according to the current heat demand of the battery to cool the battery.

[0103] Furthermore, as to how to calculate the current heat demand of the battery based on the current battery target temperature and the current actual battery temperature, and control the thermal management actuator to heat or cool the battery based on the current heat demand of the battery, reference may be made to the relevant contents in the field of battery thermal management technology known to those skilled in the art, which will not be elaborated here.

[0104] Please continue to refer to Figure 3 , which is an overall flow chart of a battery thermal management control method provided by one embodiment of the present invention. Figure 3As shown, the specific implementation process of the battery thermal management control method provided by the present invention is as follows: 1) According to the network connection information (such as mobile phone reservation information or navigation information), it is known that the vehicle is about to travel or stop for charging, thereby estimating the target required temperature of the battery (i.e., the future battery target temperature) T under the driving or charging conditions in the future time period (i.e., transition time) Δt (e.g., 30 minutes). tgtf . 2) Calculate the current battery target temperature T tgtc and future battery target temperature T tgtf If the absolute value of the temperature deviation is less than or equal to the first preset deviation threshold ΔT thd , the transition mode is not entered (i.e., thermal management of the battery is performed according to the current battery target temperature). If the absolute value of the temperature deviation is greater than the first preset deviation threshold ΔT thd Then the transition mode is entered (i.e., the battery is thermally managed according to the future battery target temperature). 3) Without entering the transition mode, the current battery target temperature T tgtc As a thermal management control target: according to the current battery target temperature T tgtc and the actual battery temperature T monitored by the vehicle sensor act To calculate the battery heat demand Q c As a thermal management request; 4) In the case of entering the transition mode, the future battery target temperature T tgtf As the control target: If the future battery target temperature T tgtf and the actual battery temperature T act The absolute value of the temperature deviation is less than or equal to the second preset deviation threshold ΔT diff , then exit the thermal management mode and stop heating or cooling the battery; if T act Greater than T tgtf +ΔT diff (That is, the actual battery temperature T act Higher than the future battery target temperature T tgtf And the absolute value of the deviation between the two is greater than the second preset deviation threshold ΔT diff ), then enter the future cooling mode S fc , if T act Less than T tgtf -ΔT diff (That is, the actual battery temperature T act Lower than the future battery target temperature T tgtf And the absolute value of the deviation between the two is greater than the second preset deviation threshold ΔT diff ), then enter the future heating mode S fh 5) Calculate the future heat demand of the battery Q f and the gradient value of the battery's future thermal demand change Q fgrd , where the gradient value of the battery's future thermal demand change is Qfgrd Defined as the future heat demand of the battery Q f Divide by the transition time Δt, and output these two items as the battery thermal management request. 6) The battery thermal management request includes the battery future demand model S fc or S fh 、Future thermal demand for batteries Q f and the gradient value of the battery's future thermal demand change Q fgrd , sent to the vehicle controller or thermal management controller in the form of a message through the CAN bus. 7) The vehicle controller or thermal management controller sends instructions to related thermal management actuators, such as water pumps, water valves, PTC heaters, compressors, cooling fans, etc., to perform corresponding actions.

[0105] Based on the same inventive concept, the present invention also provides a battery management controller, please refer to Figure 4 , which is a structural block diagram of a battery management controller provided by an embodiment of the present invention. Figure 4 As shown, the battery management controller includes a processor 110 and a memory 130, and a computer program is stored on the memory 130. When the computer program is executed by the processor 110, the battery thermal management control method described above is implemented. Since the battery management controller provided by the present invention and the battery thermal management control method provided by the present invention belong to the same inventive concept, the battery management controller provided by the present invention at least has all the beneficial effects of the battery thermal management control method provided by the present invention. For details, please refer to the relevant description of the beneficial effects of the battery thermal management control method provided by the present invention above, and no further description will be given here.

[0106] Please continue to refer to Figure 4 ,like Figure 4As shown, the battery management controller also includes a communication interface 120 and a communication bus 140, wherein the processor 110, the communication interface 120, and the memory 130 communicate with each other through the communication bus 140. The communication bus 140 includes but is not limited to a CAN bus, etc. For ease of representation, only one thick line is used in the figure, but it does not mean that there is only one bus or one type of bus. The communication interface 120 is used for communication between the above-mentioned battery management controller and other on-board controllers (such as a vehicle controller, a thermal management controller, a motor controller, etc., not shown in the figure). The communication bus 140 connects the above-mentioned battery management controller and other on-board controllers (such as a vehicle controller, a thermal management controller, a motor controller, etc., not shown in the figure) and other dispersed nodes into a closed-loop system, so that each on-board controller can communicate and transmit data in multiple working states (parking state, charging state, starting state, running state, vehicle forward and backward state, feedback braking state, mechanical braking state, general fault state, major fault state), thereby realizing the control function of the vehicle.

[0107] The processor 110 referred to in the present invention may be a central processing unit (CPU), or other general-purpose processors, digital signal processors (DSP), application-specific integrated circuits (ASIC), field-programmable gate arrays (FPGA) or other programmable logic devices, discrete gate or transistor logic devices, discrete hardware components, etc. A general-purpose processor may be a microprocessor or any conventional processor, etc. The processor 110 is the control center of the battery management controller, and uses various interfaces and lines to connect various parts of the entire battery management controller.

[0108] The memory 130 can be used to store the computer program. The processor 110 implements various functions of the battery management controller by running or executing the computer program stored in the memory 130 and calling the data stored in the memory 130. The memory 130 may include non-volatile and / or volatile memory. Non-volatile memory may include read-only memory (ROM), programmable memory (PROM), electrically programmable memory (EPROM), electrically erasable programmable memory (EEPROM) or flash memory. Volatile memory may include random access memory (RAM) or external cache memory. By way of illustration and not limitation, random access memory is available in a variety of forms, such as static random access memory (SRAM), dynamic random access memory (DRAM), synchronous random access memory (SDRAM), double data rate synchronous random access memory (DDRSDRAM), enhanced synchronous random access memory (ESDRAM), synchronous link (Synchlink) dynamic random access memory (SLDRAM), memory bus (Rambus) direct random access memory (RDRAM), direct memory bus dynamic random access memory (DRDRAM), and memory bus dynamic random access memory (RDRAM), etc.

[0109] Based on the same inventive concept, the present invention also provides a cloud server, please refer to Figure 5 , which is a structural block diagram of a cloud server provided by an embodiment of the present invention. Figure 5 As shown, the cloud server provided by the present invention includes: a future operating condition acquisition module 210, configured to acquire future operating condition information of the vehicle according to network connection information; a target temperature determination module 220, configured to determine the future battery target temperature according to the future operating condition information; a judgment module 230, configured to judge whether the absolute value of the deviation between the current battery target temperature and the future battery target temperature is greater than a first preset deviation threshold; a future thermal management module 240, configured to perform thermal management on the battery according to the future battery target temperature when the absolute value of the deviation between the current battery target temperature and the future battery target temperature is greater than the first preset deviation threshold; and a current thermal management module 250, configured to perform thermal management on the battery according to the current battery target temperature when the absolute value of the deviation between the current battery target temperature and the future battery target temperature is less than or equal to the first preset deviation threshold.

[0110] Therefore, the cloud server provided by the present invention can predict the upcoming working conditions in advance (i.e., obtain future working condition information) by making full use of network information, so as to expand the information source of battery thermal management calculation, and when the absolute value of the deviation between the current battery target temperature and the future battery target temperature determined based on the future working condition information is greater than the first preset deviation threshold, the future battery target temperature is used to perform thermal management on the battery, so that the current battery thermal demand can be gradually transitioned to the future battery thermal demand within the predicted future time period, and the battery thermal demand can be smoothly transitioned in the transition process between the parking condition and the driving condition, and the battery temperature can be optimized by starting or switching the thermal management mode earlier, so as to improve the battery thermal management work efficiency in the transition process between the parking condition and the driving condition, and reduce the energy loss caused by excessive heating or cooling. In addition, since the computing power of the cloud server is more powerful than that of the vehicle-mounted controller, the vehicle-mounted sensor signals and non-vehicle-mounted signals can be used to perform more accurate and larger-capacity calculations, so as to achieve better calculation effects.

[0111] Please continue to refer to Figure 5 ,like Figure 5 As shown, the future thermal management module 240 includes: a judgment submodule 241, configured to judge whether the absolute value of the deviation between the current actual battery temperature and the future battery target temperature is greater than a second preset deviation threshold; and a future thermal management control submodule 242, configured to: when the absolute value of the deviation between the current actual battery temperature and the future battery target temperature is greater than the second preset deviation threshold, control the thermal management actuator to heat or cool the battery according to the future battery target temperature; and when the absolute value of the deviation between the current actual battery temperature and the future battery target temperature is less than or equal to the second preset deviation threshold, control the thermal management actuator to stop heating or cooling the battery.

[0112] Please continue to refer to Figure 5 ,like Figure 5 As shown, in some exemplary embodiments, the future thermal management control submodule 242 includes: a first calculation unit 2421, configured to calculate the future thermal demand of the battery according to the future battery target temperature and the current actual battery temperature; a second calculation unit 2422, configured to calculate the future thermal demand change gradient value of the battery according to the future thermal demand of the battery and the transition time of the vehicle from the current operating condition to the future operating condition; and a first control unit 2423, configured to control the thermal management actuator to heat or cool the battery according to the future thermal demand of the battery and the future thermal demand change gradient value of the battery.

[0113] Please continue to refer to Figure 5 ,like Figure 5As shown, in some exemplary embodiments, the future thermal management control submodule 242 further includes a mode determination unit 2424, configured to determine the future battery demand mode according to the future battery target temperature and the current battery actual temperature. The first control unit 2423 is configured to control the thermal management actuator to heat or cool the battery according to the future battery demand mode, the future battery heat demand, and the future battery heat demand change gradient value.

[0114] In some exemplary embodiments, the mode determination unit 2424 is configured to: when the current actual battery temperature is higher than the future battery target temperature and the absolute value of the deviation between the two is greater than the second preset deviation threshold, determine the battery future demand mode as the future cooling mode; when the current actual battery temperature is lower than the future battery target temperature and the absolute value of the deviation between the two is greater than the second preset deviation threshold, determine the battery future demand mode as the future heating mode.

[0115] In some exemplary embodiments, the first control unit 2423 is configured to send the battery future demand mode, the battery future heat demand and the battery future heat demand change gradient value to the vehicle controller or the thermal management controller in the form of a message, so that the vehicle controller or the thermal management controller controls the thermal management actuator to heat or cool the battery.

[0116] In some exemplary embodiments, the current thermal management module 250 includes: a third calculation unit 251, configured to calculate the current thermal demand of the battery based on the current battery target temperature and the current actual battery temperature; and a second control unit 252, configured to control the thermal management actuator to heat or cool the battery based on the current thermal demand of the battery.

[0117] Based on the same inventive concept, the present invention also provides a readable storage medium, wherein a computer program is stored in the readable storage medium, and when the computer program is executed by a processor, the battery thermal management control method described above can be implemented. Since the readable storage medium provided by the present invention and the battery thermal management control method provided by the present invention belong to the same inventive concept, the readable storage medium provided by the present invention at least has all the beneficial effects of the battery thermal management control method provided by the present invention. For details, please refer to the relevant description of the beneficial effects of the battery thermal management control method provided by the present invention above, and no further description will be given here.

[0118] The readable storage medium provided by the present invention can adopt any combination of one or more computer-readable media. The readable medium can be a computer-readable signal medium or a computer-readable storage medium. The computer-readable storage medium can be, for example, but not limited to, a system, device or component of electricity, magnetism, light, electromagnetic, infrared or semiconductor, or any combination of the above. More specific examples (non-exhaustive enumeration) of computer-readable storage media include: an electrical connection with one or more wires, a portable computer hard 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 of the above. In this article, a computer-readable storage medium can be any tangible medium containing or storing a program, which can be used by an instruction execution system, a device or a device or used in combination with it.

[0119] Computer-readable signal media may include data signals propagated in baseband or as part of a carrier wave, which carry computer-readable program codes. Such propagated data signals may take a variety of forms, including but not limited to electromagnetic signals, optical signals, or any suitable combination of the above. Computer-readable signal media may also be any computer-readable medium other than a computer-readable storage medium, which may send, propagate, or transmit a program for use by or in conjunction with an instruction execution system, device, or device. The program code contained on the computer-readable medium may be transmitted using any suitable medium, including but not limited to wireless, wire, optical cable, RF, etc., or any suitable combination of the above.

[0120] In summary, compared with the prior art, the battery thermal management control method, battery management controller, cloud server and readable storage medium provided by the present invention have the following beneficial effects:

[0121] The present invention can predict the upcoming working conditions in advance (i.e., obtain future working condition information) by making full use of network information, thereby expanding the information source for battery thermal management calculation, and when the absolute value of the deviation between the current battery target temperature and the future battery target temperature determined based on the future working condition information is greater than the first preset deviation threshold, the future battery target temperature is used to perform thermal management on the battery, so that the current battery thermal demand can be gradually transitioned to the future battery thermal demand within the predicted future time period, and a smooth transition of the battery thermal demand in the transition process between the parking condition and the driving condition can be achieved, and the battery temperature can be optimized by starting or switching the thermal management mode earlier, thereby improving the battery thermal management efficiency in the transition process between the parking condition and the driving condition, and reducing the energy loss caused by excessive heating or cooling. In addition, the present invention does not need to increase additional hardware costs, and only needs to use the existing interface information on the vehicle equipped with the network information receiving function to achieve the effect of improving the battery thermal management efficiency and reducing the energy loss caused by excessive heating or cooling in the transition process between the parking condition and the driving condition.

[0122] It should be noted that the computer program code for performing the operation of the present invention can be written in one or more programming languages ​​or a combination thereof, including object-oriented programming languages-such as Java, Smalltalk, C++, and also conventional procedural programming languages-such as "C" language or similar programming languages. The program code can be executed entirely on the user's computer, partially on the user's computer, as an independent software package, partially on the user's computer and partially on a remote computer, or entirely on a remote computer or server. In the case of a remote computer, the remote computer can 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 can be connected to an external computer (for example, using an Internet service provider to connect through the Internet).

[0123] It should be noted that the devices and methods disclosed in the embodiments of this article can also be implemented in other ways. The device implementation described above is only schematic. For example, the flowcharts and block diagrams in the accompanying drawings show the possible architecture, functions and operations of the devices, methods and computer program products according to multiple embodiments of this article. In this regard, each box in the flowchart or block diagram can represent a part of a module, program or code, and the module, program segment or part of the code contains one or more executable instructions for implementing the specified logical function, and the module, program segment or part of the code contains one or more executable instructions for implementing 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 from the order marked in the accompanying drawings. For example, two consecutive boxes 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 flowchart, and the combination of boxes in the block diagram and / or flowchart can be implemented by a dedicated hardware-based system for performing a specified function or action, or can be implemented by a combination of dedicated hardware and computer instructions. In addition, the functional modules in the various embodiments of this document may be integrated together to form an independent part, or each module may exist independently, or two or more modules may be integrated to form an independent part.

[0124] It should also be noted that the above description is only a description of the preferred embodiment of the present invention, and is not any limitation on the scope of the present invention. Any changes and modifications made by a person skilled in the art in the field of the present invention based on the above disclosure are within the scope of protection of the present invention. Obviously, a person skilled in the art can make various changes and modifications to the present invention without departing from the spirit and scope of the present invention. Thus, if these modifications and variations fall within the scope of the present invention and its equivalents, the present invention is also intended to include these modifications and variations.

Claims

1. A battery thermal management control method, characterized in that: include: Obtain the vehicle's future operating condition information based on the network information; Determining a future target battery temperature according to the future operating condition information; Determining whether an absolute value of a deviation between a current battery target temperature and the future battery target temperature is greater than a first preset deviation threshold; If yes, thermally managing the battery according to the future battery target temperature; If not, thermal management is performed on the battery according to the current battery target temperature.

2. The battery thermal management control method according to claim 1, characterized in that: The thermal management of the battery according to the future target battery temperature includes: Determining whether an absolute value of a deviation between a current actual battery temperature and the future target battery temperature is greater than a second preset deviation threshold; If so, controlling a thermal management actuator to heat or cool the battery according to the future battery target temperature; If not, the thermal management actuator is controlled to stop heating or cooling the battery.

3. The battery thermal management control method according to claim 2, characterized in that: The step of controlling the thermal management actuator to heat or cool the battery according to the future battery target temperature includes: Calculating the future heat demand of the battery according to the future target battery temperature and the current actual battery temperature; Calculating a gradient value of a future thermal demand change of the battery according to the future thermal demand of the battery and a transition time of the vehicle from a current operating condition to a future operating condition; The thermal management actuator is controlled to heat or cool the battery according to the future heat demand of the battery and the gradient value of the change in the future heat demand of the battery.

4. The battery thermal management control method according to claim 3, characterized in that: The step of controlling the thermal management actuator to heat or cool the battery according to the future battery target temperature further includes: Determining a future battery demand mode according to the future battery target temperature and the current battery actual temperature; The step of controlling the thermal management actuator to heat or cool the battery according to the future heat demand of the battery and the gradient value of the future heat demand change of the battery includes: The thermal management actuator is controlled to heat or cool the battery according to the future demand mode of the battery, the future heat demand of the battery and the gradient value of the change of the future heat demand of the battery.

5. The battery thermal management control method according to claim 4, characterized in that: The determining of the future battery demand mode according to the future battery target temperature and the current battery actual temperature includes: If the current actual battery temperature is higher than the future target battery temperature and the absolute value of the deviation between the current actual battery temperature and the future target battery temperature is higher than the second preset deviation threshold, the future battery demand mode is determined as a future cooling mode; If the current actual battery temperature is lower than the future target battery temperature and the absolute value of the deviation between the two is greater than the second preset deviation threshold, the future battery demand mode is determined as the future heating mode.

6. The battery thermal management control method according to claim 4, characterized in that: The step of controlling the thermal management actuator to heat or cool the battery according to the future demand mode of the battery, the future heat demand of the battery, and the future heat demand change gradient value of the battery includes: The battery future demand mode, the battery future heat demand and the battery future heat demand change gradient value are sent to the vehicle controller or the thermal management controller in the form of a message, so that the vehicle controller or the thermal management controller controls the thermal management actuator to heat or cool the battery.

7. The battery thermal management control method according to claim 1, characterized in that: The thermal management of the battery according to the current battery target temperature includes: Calculating a current heat demand of the battery according to the current battery target temperature and the current actual battery temperature; The thermal management actuator is controlled to heat or cool the battery according to the current thermal demand of the battery.

8. A battery management controller, characterized in that: The invention comprises a processor and a memory, wherein a computer program is stored in the memory, and when the computer program is executed by the processor, the battery thermal management control method according to any one of claims 1 to 7 is implemented.

9. A cloud server, characterized in that: The cloud server includes: A future operating condition acquisition module, configured to acquire future operating condition information of the vehicle based on network connection information; a target temperature determination module, configured to determine a future battery target temperature according to the future operating condition information; a judgment module configured to judge whether an absolute value of a deviation between a current battery target temperature and the future battery target temperature is greater than a first preset deviation threshold; a future thermal management module configured to perform thermal management on the battery according to the future battery target temperature when the absolute value of the deviation between the current battery target temperature and the future battery target temperature is greater than the first preset deviation threshold; and The current thermal management module is configured to perform thermal management on the battery according to the current battery target temperature when the absolute value of the deviation between the current battery target temperature and the future battery target temperature is less than or equal to the first preset deviation threshold.

10. A readable storage medium, characterized in that: The readable storage medium stores a computer program, and when the computer program is executed by a processor, the battery thermal management control method according to any one of claims 1 to 7 is implemented.

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