Heating control method and device of power battery and vehicle

Abstract

The present disclosure relates to a heating control method and device of a power battery and a vehicle, wherein the method comprises: determining a heating demand of the power battery and waste heat generated by the vehicle based on other demands; and triggering a first heating mode in a case where the waste heat meets the heating demand, the first heating mode being a mode of heating the power battery by using the waste heat.

Description

TECHNICAL FIELD

[0001] The present disclosure relates to the technical field of temperature control, and more particularly, to a heating control method and device for a power battery and a vehicle. BACKGROUND

[0002] A power battery is a power source of a new energy vehicle, and its charging and discharging performance is affected by temperature. In order to make the battery perform best, the battery temperature is often managed by a battery thermal management system. For example, when the battery temperature is low, the vehicle's cruising range is severely attenuated, and the battery can be heated by the battery thermal management system to improve the vehicle's cruising range at low temperature.

[0003] In related technologies, the battery thermal management strategy is to heat the battery when there is a battery heating demand in a low temperature environment. In this case, the battery heating is started at a low temperature, and a large amount of heat needs to be consumed to heat the battery temperature to a target temperature. Moreover, when there is no battery heating demand and the vehicle generates a large amount of waste heat based on other demands, the waste heat will be dissipated to the environment, causing waste of heat and affecting the vehicle's cruising range. SUMMARY

[0004] An object of embodiments of the present disclosure is to provide a new technical solution for heating a power battery that is beneficial to saving energy.

[0005] According to a first aspect of the present disclosure, a heating control method for a power battery is provided, comprising:

[0006] determining a heating demand of the power battery and waste heat generated by a vehicle based on other demands;

[0007] in a case where the waste heat meets the heating demand, triggering a first heating mode, the first heating mode being a mode of heating the power battery by using the waste heat.

[0008] Optionally, the determining the heating demand of the power battery specifically comprises:

[0009] determining the heating demand according to a current temperature value and a target temperature value of the power battery, wherein the current temperature value is less than a preset starting temperature threshold.

[0010] Optionally, before determining the heating demand, the method further comprises:

[0011] determining, according to corresponding curve data of the temperature value and a starting SOC value of the power battery, that an SOC value of the power battery is not less than a starting SOC value corresponding to the current temperature value.

[0012] In a case where the SOC value of the power battery is determined to be not less than the start SOC value corresponding to the current temperature value, the steps of determining the heating demand and determining the waste heat generated by the vehicle based on other demands are performed.

[0013] Optionally, before the heating demand is determined, the method further comprises:

[0014] According to the corresponding curve data of the temperature value and the start SOC value of the power battery, it is determined that the SOC value of the power battery is less than the start SOC value corresponding to the current temperature value.

[0015] In a case where the SOC value of the power battery is less than the start SOC value corresponding to the current temperature value, a second heating mode is triggered; wherein the second heating mode is a mode of heating the power battery by using the heat generated by the vehicle based on the heating demand.

[0016] Optionally, before the heating demand is determined, the method further comprises:

[0017] According to the cell pressure difference of the power battery, it is determined that the cell pressure difference of the power battery is greater than or equal to a pressure difference threshold value.

[0018] In a case where the cell pressure difference of the power battery is greater than or equal to the pressure difference threshold value, a second heating mode is triggered; wherein the second heating mode is a mode of heating the power battery by using the heat generated by the vehicle based on the heating demand.

[0019] Optionally, after the second heating mode is triggered, the method further comprises:

[0020] When the battery information of the power battery satisfies at least one of the following conditions, the second heating mode is exited:

[0021] The current temperature value of the power battery is greater than or equal to a preset closing temperature threshold value corresponding to the second heating mode;

[0022] The SOC value of the power battery is less than or equal to a closing SOC value corresponding to the current temperature value of the power battery.

[0023] Optionally, the second heating mode includes at least two sub-heating modes, wherein different sub-heating modes differ in at least one of heating power and corresponding power range.

[0024] Optionally, the second heating mode includes a first sub-heating mode and a second sub-heating mode, the heating power of the second sub-heating mode is greater than the heating power of the first sub-heating mode, and the lower limit value of the second power range corresponding to the first sub-heating mode is greater than the upper limit value of the third power range corresponding to the second sub-heating mode.

[0025] Optionally, after triggering the first sub-heating mode, the method further comprises:

[0026] When the battery information of the power battery satisfies at least one of the following conditions, the first sub-heating mode is exited:

[0027] The current temperature value of the power battery is greater than or equal to a preset closing temperature threshold corresponding to the first sub-heating mode;

[0028] The battery information of the power battery satisfies a triggering condition of the second sub-heating mode;

[0029] The SOC value of the power battery is less than or equal to a closing SOC value corresponding to the current temperature value of the power battery;

[0030] Optionally, after triggering the second sub-heating mode, the method further comprises:

[0031] When the battery information of the power battery satisfies at least one of the following conditions, the second sub-heating mode is exited:

[0032] The current temperature value of the power battery is greater than or equal to a preset closing temperature threshold corresponding to the second sub-heating mode;

[0033] The SOC value of the power battery is less than or equal to a closing SOC value corresponding to the current temperature value of the power battery.

[0034] Optionally, after triggering the first heating mode, the method further comprises:

[0035] When the battery information of the power battery satisfies at least one of the following conditions, the first heating mode is exited:

[0036] The current temperature value of the power battery is greater than or equal to a preset closing temperature threshold corresponding to the first heating mode;

[0037] The battery information of the power battery satisfies a triggering condition of a second heating mode; wherein the second heating mode is a mode of heating the power battery by using heat generated by the vehicle based on the heating demand;

[0038] The SOC value of the power battery is less than or equal to a closing SOC value corresponding to the current temperature value of the power battery.

[0039] Optionally, before determining the heating demand, the method further comprises:

[0040] determine gear information of a plurality of heating modes in a current driving mode, wherein the plurality of heating modes comprise a first heating mode and a second heating mode, and different driving modes correspond to different gear information of the same heating mode;

[0041] determine a target heating mode matched with battery information of the power battery according to the determined gear information;

[0042] in a case that the target heating mode is the first heating mode, perform the steps of determining the heating demand and determining the waste heat generated by the vehicle based on other demands;

[0043] in a case that the target heating mode is the second heating mode, trigger the second heating mode.

[0044] According to a second aspect of the present disclosure, a heating control device of a power battery is provided, comprising:

[0045] a determining module configured to determine a heating demand of the power battery and waste heat generated by a vehicle based on other demands;

[0046] a heating triggering module configured to, in a case that the waste heat meets the heating demand, trigger a first heating mode, wherein the first heating mode is to heat the power battery by using the waste heat.

[0047] According to a third aspect of the present disclosure, a heating control device of a power battery is further provided, comprising a memory and a processor, wherein the memory stores executable instructions for controlling the processor to perform the method according to the first aspect.

[0048] According to a fourth aspect of the present disclosure, a vehicle is further provided, comprising a power battery, a heating control device according to the second aspect or the third aspect, and a heating system.

[0049] An advantage of the present disclosure is that the heating control method of the power battery according to the present disclosure determines a heating demand and waste heat generated by a vehicle based on other demands, and in a case that the waste heat meets the heating demand, triggers a first heating mode, wherein the first heating mode is to heat the power battery by using the waste heat. By setting the first heating mode, the waste heat generated by the vehicle based on other demands is utilized, thereby avoiding waste of heat and improving the driving range of the vehicle.

[0050] Other features and advantages of the present disclosure will become apparent from the following detailed description of exemplary embodiments thereof, taken in conjunction with the accompanying drawings. BRIEF DESCRIPTION OF DRAWINGS

[0051] The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments of the application and, together with the description, serve to explain the principles of the application.

[0052] Figure 1 is a flowchart of a heating control method of a power battery according to some embodiments;

[0053] Figure 2 is a flowchart of a heating control method of a power battery according to some embodiments;

[0054] Figure 3 is a structural diagram of a heating control device of a power battery according to some embodiments;

[0055] Figure 4 is a structural diagram of a heating control device of a power battery according to some embodiments;

[0056] Figure 5 is a structural diagram of a vehicle according to some embodiments. DETAILED DESCRIPTION

[0057] Various exemplary embodiments of the present application will now be described in detail with reference to the accompanying drawings. It should be noted that the relative arrangement of the components and steps set forth in the embodiments, numerical expressions, and numerical values, unless specifically stated otherwise, do not limit the scope of the application.

[0058] The following description of at least one exemplary embodiment is merely exemplary in nature and is in no way intended to limit the scope of the application its application or uses.

[0059] Techniques, methods, and apparatus known to those of ordinary skill in the relevant art can not be discussed in detail herein, but should be considered as part of the specification, where appropriate.

[0060] In all of the examples shown and discussed herein, any specific values should be interpreted as merely exemplary, and not as a limitation. Thus, other examples of exemplary embodiments can have different values.

[0061] It should be noted that like references and characters herein relate to like items throughout the figures, and once an item is defined in one figure, it need not be discussed further in subsequent figures.

[0062] Embodiments of the present disclosure relate to technical solutions of heating control of a power battery. A vehicle includes a heating system, which can heat the power battery by waste heat generated by the vehicle based on other demands.

[0063] As Figure 1As shown in FIG. 1, a flowchart of a heating control method of a power battery is shown, which can be implemented by a heating control device of the power battery. The method comprises steps S1100-S1200.

[0064] In step S1100, the heating demand of the power battery and the waste heat generated by the vehicle based on other demands are determined.

[0065] In this embodiment, a plurality of heating modes are preset, and the plurality of heating modes include a first heating mode. The first heating mode can be a heating mode in which the waste heat in the heating system is used to heat the power battery, wherein the waste heat can be heat generated by the vehicle based on other demands. For example, heat generated by the motor and the motor controller during operation based on the driving demand of the vehicle, smart recycling energy generated by the motor based on the braking demand of the vehicle, etc.

[0066] Each heating mode corresponds to a trigger condition and a heating power. The trigger condition can be a condition that needs to be met to start the heating mode. The trigger condition can include at least one of a condition corresponding to the power value of the power battery, a condition corresponding to the cell voltage difference of the power battery, and a condition corresponding to the temperature value of the power battery.

[0067] Regardless of whether the power battery is in a charging process or a discharging process, the heating control device of the power battery can determine the heating mode corresponding to the trigger condition satisfied by the battery information, i.e., the target heating mode, according to the battery information of the power battery and the trigger conditions corresponding to the plurality of heating modes. The battery information can be at least one of the power value of the power battery, the cell voltage difference of the power battery, and the temperature value of the power battery.

[0068] In some embodiments, when the power battery is in a discharging process, the target heating mode matching the battery information of the power battery is determined.

[0069] Since the temperature has a serious impact on the performance of the power battery during the discharging process of the power battery, the driving range of the vehicle is affected.

[0070] In this embodiment, when the power battery is in a discharging process, the power battery is heated and controlled, the battery information of the power battery is obtained, and the target heating mode is matched through the battery information of the power battery.

[0071] In some embodiments, before step S1100, the method further comprises steps S2100-S2200.

[0072] In step S2100, according to the corresponding curve data of the temperature value and the starting SOC value of the power battery, it is determined that the SOC value of the power battery is not less than the starting SOC value corresponding to the current temperature value.

[0073] In this embodiment, the battery information of the power battery includes a power value of the power battery, and the trigger condition includes a condition corresponding to the power value of the power battery. The trigger condition of the first heating mode includes that the SOC value of the power battery is not less than a start SOC value corresponding to the current temperature value. The correspondence between the temperature value of the power battery and the start SOC value can be determined according to the corresponding curve data of the temperature value of the power battery and the start SOC value.

[0074] In one example, the start power value corresponding to the temperature value of the power battery can be as shown in Table 1.

[0075] Table 1: Correspondence between the temperature value of the power battery and the start SOC value and the off SOC value.

[0076] Battery temperature Start SOC value Stop SOC value -20 S1 M1 -15 S2 M2 -10 S3 M3 -5 S4 M4 0 S5 M5

[0077] If the temperature value of the power battery is -20°C, the start power value corresponding to the temperature value is S1 determined by Table 1, and if the power value of the power battery is greater than or equal to S1, it is determined that the target heating mode is the first heating mode. Therefore, by determining the heating demand in advance, the target heating mode can be determined according to the SOC value of the power battery. When the SOC value is not less than S1, it is determined that the target heating mode is the first heating mode.

[0078] Step S2200: In a case where it is determined that the SOC value of the power battery is not less than the start SOC value corresponding to the current temperature value, the steps of determining the heating demand and determining the waste heat generated by the vehicle based on other demands are performed.

[0079] In this embodiment, in a case where it is determined that the target heating mode is the first heating mode, since the first heating mode needs to use waste heat for heating, it is necessary to determine the heating demand and the waste heat to determine whether the waste heat meets the heating demand.

[0080] In some embodiments, before step S1100 of determining the heating demand, the method further includes steps S3100-S3200.

[0081] Step S3100: According to the corresponding curve data of the temperature value of the power battery and the start SOC value, it is determined that the SOC value of the power battery is less than the start SOC value corresponding to the current temperature value.

[0082] In this embodiment, the second heating mode is included in the plurality of preset heating modes. The second heating mode is a mode of heating the power battery by using the heat generated by the vehicle based on the heating demand. The trigger condition of the second heating mode is that the SOC value of the power battery is less than the start SOC value corresponding to the current temperature value of the power battery.

[0083] For example, based on Table 1, if the temperature value of the power battery is -20℃, the starting power value corresponding to the temperature value is determined as S1 according to Table 1, and if the SOC value of the power battery is less than S1, the target heating mode is determined as the second heating mode.

[0084] Step S3200: in a case where the SOC value of the power battery is less than the starting SOC value corresponding to the current temperature, triggering the second heating mode.

[0085] In this embodiment, since the second heating mode is a heating mode aiming to meet the battery heating demand, the vehicle can actively generate heat to meet the heating demand in this mode, and it is not necessary to consider whether the waste heat generated by the vehicle based on other demands meets the heating demand. Therefore, in a case where the target heating mode is determined as the second heating mode, the second heating mode is directly triggered, and step S1100 is not performed.

[0086] In some embodiments, before step S1100, the method further includes steps S4100-S4200.

[0087] Step S4100: determining, according to the cell pressure difference of the power battery, that the cell pressure difference of the power battery is greater than or equal to a pressure difference threshold.

[0088] Step S4200: in a case where the cell pressure difference of the power battery is greater than or equal to the pressure difference threshold, triggering the second heating mode.

[0089] In this embodiment, the triggering condition of the second heating mode is that the cell pressure difference of the power battery is greater than or equal to the pressure difference threshold. The second heating mode is a mode of heating the power battery by using the heat generated by the vehicle based on the heating demand.

[0090] In some embodiments, determining the heating demand in step S1100 includes determining the heating demand according to a current temperature value and a target temperature value of the power battery, where the current temperature value is less than a preset starting temperature threshold.

[0091] In this embodiment, a starting temperature threshold corresponding to each heating mode is preset.

[0092] For example, the starting temperature threshold corresponding to the first heating mode is -10℃, and the starting temperature threshold corresponding to the second heating mode is 10℃.

[0093] When the current temperature value is less than the preset starting temperature threshold, it indicates that the power battery meets the condition of being heated by the target heating mode, and the power battery can be heated by the determined first heating mode or second heating mode.

[0094] The target temperature value can be a value manually input by the vehicle owner or a value set by default, which is not limited herein. According to the current temperature value and the target temperature value, the heating demand for the power battery is determined.

[0095] In one example, the triggering condition of the first heating mode includes that the temperature value of the power battery is less than or equal to the starting temperature value corresponding to the first heating mode (-10℃), and the power value of the power battery is greater than the starting power value corresponding to the temperature value of the power battery. The second heating mode includes the first triggering condition and the second triggering condition. The first triggering condition includes that the temperature value of the power battery is less than or equal to the starting temperature value corresponding to the second heating mode (10℃), and the SOC value of the power battery is less than or equal to the starting SOC value corresponding to the temperature value of the power battery. The second triggering condition includes that the cell voltage difference value of the power battery is greater than or equal to the voltage difference threshold value, and the temperature value of the power battery is less than or equal to the starting temperature value corresponding to the second heating mode (-2℃).

[0096] It should be noted that the starting temperature values corresponding to the first triggering condition and the second triggering condition of the second heating mode can be the same or different, and the examples herein cannot be used as a limitation on the present application. The starting SOC value is a variable related to the temperature value of the power battery, that is, the temperature value of the power battery is different, and the starting SOC value is different. The voltage difference threshold value is a pre-set fixed value.

[0097] According to the embodiments of the present application, the triggering condition of the second heating mode includes the voltage difference monitoring between the cells. When it is monitored that the voltage difference between the cells is greater than or equal to the voltage difference threshold value, it is determined that the target heating mode is the second heating mode. The discharge performance of the battery after heating can be improved, and the sudden drop of the power value of the power battery can be effectively avoided, so as to ensure that the discharge capacity of the power battery meets the target requirement.

[0098] In some embodiments, the heating power of the first heating mode is lower than the heating power of the second heating mode.

[0099] In the present embodiment, the first heating mode can be a heating mode in which the waste heat generated by the vehicle based on other requirements is used to store heat for the power battery. The waste heat can be, for example, the heat generated by the motor and the motor controller during operation. Moreover, the second heating mode can be a heating mode in which the heat generated by the vehicle based on the heating requirement is used to store heat for the power battery. The difference is that the heat generated by the motor and the motor controller during operation corresponding to the second heating mode is higher than the heat generated by the motor and the motor controller during operation corresponding to the first heating mode, that is, the heating power of the second heating mode is greater than the heating power of the first heating mode, that is, the temperature rise rate of the power battery of the second heating mode is greater than the temperature rise rate of the power battery of the first heating mode.

[0100] In some examples, the efficiency of the motor and the motor controller corresponding to the first heating mode is 90%, that is, when the motor and the motor controller are working, 90% of the energy is used to provide driving force of the vehicle, and 10% of the energy is used to heat the power battery. The efficiency of the motor and the motor controller corresponding to the second heating mode is 70%, that is, in the case of the second heating mode, the efficiency of the motor and the motor controller is reduced, 70% of the energy is used to provide driving force of the vehicle, and 30% of the energy is used to heat the power battery. At this time, the heating power of the second heating mode is greater than the heating power of the first heating mode.

[0101] According to the embodiment of the present application, the heating power of the first heating mode is lower than the heating power of the second heating mode. When the power battery is in the first heating mode, heating the battery with a smaller heating power can reduce the temperature rise rate of the battery, prolong the time when the battery is at a low temperature, reduce the heat dissipation of the battery to the environment, and at the same time, the lower temperature rise rate can prolong the heating time and make more use of the waste heat generated by the motor and the motor controller. When the battery is in the second heating mode, heating the battery with a larger heating power can increase the temperature rise rate of the battery, reach the target temperature value of the battery heating in a shorter time, improve the discharge performance of the battery, and improve the driving range of the vehicle.

[0102] In some embodiments, the second heating mode includes at least two sub-heating modes, and different sub-heating modes are different in at least one of heating power and corresponding power range.

[0103] For example, the second heating mode includes a first sub-heating mode and a second sub-heating mode. The heating power of the second sub-heating mode is greater than the heating power of the first heating mode. That is, the temperature rise rate of the power battery corresponding to the second sub-heating mode is greater than the temperature rise rate of the power battery corresponding to the first sub-heating mode, and the temperature rise rate of the power battery corresponding to the second sub-heating mode and the first sub-heating mode is greater than the temperature rise rate of the power battery corresponding to the first heating mode.

[0104] The lower limit value of the second power range corresponding to the first sub-heating mode is greater than the upper limit value of the third power range corresponding to the second sub-heating mode.

[0105] In one example, if the temperature value of the power battery is -20℃, the starting power value corresponding to the temperature value is determined as S1 through Table 1, the temperature value of the power battery is less than or equal to the starting temperature value (-10℃) corresponding to the first heating mode, the power value of the power battery is greater than or equal to the starting power value S1, and the power value of the power battery is in the first power range (a<SOC≤100%), it is determined that the target heating mode is the first heating mode.

[0106] In another example, if the temperature value of the power battery is -5℃, the starting power value corresponding to the temperature value is S4 according to Table 1, the temperature value of the power battery is less than or equal to the starting temperature value (10℃) corresponding to the first sub-heating mode, the power value of the power battery is less than the starting power value S4, and the power value of the power battery is in the second power range (a < SOC ≤ 100%), it is determined that the target heating mode is the first sub-heating mode. Alternatively, if the temperature value of the power battery is less than or equal to the starting temperature value (-2℃) corresponding to the first sub-heating mode, the cell pressure difference of the power battery is greater than or equal to the pressure difference threshold, and the power value of the power battery is in the second power range (a < SOC ≤ 100%), it is determined that the target heating mode is the first sub-heating mode.

[0107] In yet another example, if the temperature value of the power battery is 0℃, the starting power value corresponding to the temperature value is S5, the temperature value of the power battery is less than or equal to the starting temperature value (10℃) corresponding to the second sub-heating mode, the power value of the power battery is less than the starting power value S5, and the power value of the power battery is in the third power range (0 < SOC ≤ a), the target heating mode is the second sub-heating mode. Alternatively, if the temperature value of the power battery is less than or equal to the starting temperature value (10℃) corresponding to the second sub-heating mode, the cell pressure difference of the power battery is greater than or equal to the pressure difference threshold, and the power value of the power battery is in the third power range (0 < SOC ≤ a), the target heating mode is the second sub-heating mode.

[0108] According to the embodiments of the present application, by setting the first heating mode, the first sub-heating mode and the second sub-heating mode, wherein the heating power of the first sub-heating mode is greater than the heating power of the first heating mode, the heating power of the second sub-heating mode is greater than the heating power of the first sub-heating mode, and the lower limit value of the power range corresponding to the first sub-heating mode is greater than the upper limit value of the power range corresponding to the second sub-heating mode, different heating powers corresponding to different heating modes can be realized, the heating demand of the power battery can be better met, and the driving range of the vehicle can be improved.

[0109] In one embodiment, the waste heat includes heat generated by the motor and the motor controller of the vehicle during operation.

[0110] In the present embodiment, a plurality of liquid pipes are integrated in the power battery, and a medium such as water or oil is included in the plurality of liquid pipes. The motor and the motor controller can be started based on the driving demand of the vehicle and the like, and the heat generated during operation of the motor and the motor controller can heat the medium in the liquid pipes to increase the temperature of the medium, thereby heating the power battery.

[0111] In one embodiment, the waste heat generated by the vehicle based on other demands also includes brake energy recovery.

[0112] In this embodiment, during the braking of the vehicle, the motor generates a reverse electromotive force due to the kinetic energy of inertia. At this time, the motor can be regarded as a generator, generating braking recovery energy. The braking recovery energy can be used to charge the power battery or to heat the heating system.

[0113] In one embodiment, the braking recovery energy has a lower priority for distribution to the heating system than for feedback charging of the power battery.

[0114] In this embodiment, the braking recovery energy is preferentially used to meet the feedback charging demand of the power battery. When the power battery has sufficient power, i.e., the feedback charging demand of the power battery is relatively small, the braking recovery energy is distributed to the heating system to heat the power battery. When the power battery has insufficient power, the braking recovery energy is preferentially distributed to the feedback charging of the power battery to meet the feedback charging demand of the power battery. When the braking recovery energy has a surplus after meeting the feedback charging demand, the surplus braking recovery energy is distributed to the heating system.

[0115] According to the embodiments of the present application, by preferentially using the braking recovery energy for feedback charging of the battery, the surplus energy of the braking recovery energy after feedback charging of the battery is distributed to the heating system, which can avoid waste of the braking recovery energy, improve the utilization effect of the vehicle energy, and increase the cruising range of low-temperature driving.

[0116] Step S1200: triggering a first heating mode when the waste heat meets the heating demand.

[0117] In this embodiment, the heating demand of the power battery is compared with the waste heat generated by the vehicle based on other demands. If the waste heat meets the heating demand, the first heating mode is triggered. If the waste heat does not meet the heating demand, the first heating mode is not triggered.

[0118] In some embodiments, after the first heating mode is triggered in step S1200, the method further includes: in response to triggering of the first heating mode, when the medium temperature of the heating system is greater than a temperature threshold.

[0119] In the embodiment, the heating system includes a plurality of liquid pipes integrated in the power battery, and a medium, such as water, flows in the liquid pipes. The heating system can heat the power battery by the water in the liquid pipes. Since the first heating mode is a heating mode in which the power battery is heated by the waste heat in the heating system, the purpose is to utilize the waste heat in the heating system instead of meeting the heating demand of the battery, that is, the vehicle does not actively generate heat in this mode. Therefore, after the first heating mode is triggered, it is necessary to determine whether the waste heat generated by the vehicle based on other demands meets the heating power requirement corresponding to the first heating mode, that is, whether the medium temperature of the heating system is greater than the temperature threshold. In the case where the medium temperature is greater than the temperature threshold, it indicates that there is more waste heat, which meets the heating power requirement, and the power battery is heated in response to the triggering of the first heating mode. In the case where the medium temperature is less than or equal to the temperature threshold, it indicates that there is less waste heat, which is insufficient to meet the heating power requirement, and the power battery is not heated in response to the triggering of the first heating mode.

[0120] In one example, the temperature threshold can be -5℃.

[0121] In some embodiments, before step S1100 of determining the heating demand, the method further includes steps S5100-S5400.

[0122] In step S5100, gear information of a plurality of heating modes in a current driving mode is determined.

[0123] In the embodiment, a plurality of heating modes are preset, wherein the plurality of heating modes include a first heating mode and a second heating mode. At least one driving mode is preset, and the at least one driving mode includes at least one of an ordinary driving mode, an economic driving mode and a sports driving mode. For the same heating mode, different driving modes correspond to different gear information and different heating power. The gear information can be used to represent the triggering condition corresponding to the heating mode.

[0124] In the example in which the plurality of heating modes include the second heating mode and the first heating mode, the second heating mode includes three gear information, that is, three triggering conditions, corresponding to the three driving modes. The first heating mode includes three gear information, that is, three triggering conditions, corresponding to the three driving modes, that is, a total of six gear information. In the case where the current driving mode is the economic driving mode, the gear information of the second heating mode and the first heating mode in the economic driving mode is determined.

[0125] In an example in which the multiple heating modes include the first heating mode, the second heating mode, and the third heating mode, each heating mode includes three gear information corresponding to the three driving modes, i.e., three trigger conditions. That is, there are nine gear information in total. In a case where the current driving mode is the normal driving mode, the gear information, i.e., the trigger condition, of the first heating mode, the second heating mode, and the third heating mode in the normal driving mode is determined.

[0126] In an example in which the trigger condition includes a condition corresponding to the power amount value of the power battery, a corresponding relationship between the temperature value of the power battery and the start power amount value in each driving mode, i.e., a relationship table as shown in Table 1, i.e., three relationship tables, is determined for each driving mode, and the values of the three relationship tables are different. According to the current driving mode, the relationship table corresponding to the current driving mode, i.e., one of the three relationship tables, is determined.

[0127] In an example in which the trigger condition further includes a condition that the temperature value of the power battery is less than or equal to the start temperature value corresponding to the heating mode, the start temperature value corresponding to the first heating mode is lower than the start temperature value corresponding to the second heating mode. For the first heating mode or the second heating mode, the start temperature value in the economic driving mode is lower than the start temperature value in the normal driving mode, and the start temperature value in the normal driving mode is lower than the start temperature value in the sport driving mode.

[0128] Step S5200, according to the determined gear information, determine the target heating mode matching the battery information of the power battery.

[0129] In an example in which the multiple heating modes include the second heating mode and the first heating mode, according to the gear information corresponding to the current driving mode and the battery information of the power battery, the target heating mode is matched in the multiple heating modes, i.e., the target heating mode can be the second heating mode or the first heating mode.

[0130] In an example in which the multiple heating modes include the first heating mode, the second heating mode, and the third heating mode, the target heating mode can be one of the first heating mode, the second heating mode, and the third heating mode.

[0131] Step S5300, in a case where the target heating mode is the first heating mode, the steps of determining the heating demand and determining the waste heat generated by the vehicle based on other demands are performed.

[0132] Step S5400, in a case where the target heating mode is the second heating mode, the second heating mode is triggered.

[0133] In the embodiment, for the same target heating mode, the heating requests sent to the heating system are different in different driving modes, i.e., the heating demands are different. In the economic driving mode, a low heating request is sent to the heating system, in the normal driving mode, a medium heating request is sent to the heating system, and in the sports driving mode, a high heating request is sent to the heating system. After receiving the corresponding heating request, the heating system determines the heating power of the target heating mode in the current driving mode according to the corresponding heating request, and heats the power battery through the heating power.

[0134] The heating power of the target heating mode in different driving modes is different.

[0135] In one embodiment, the heating power of the target heating mode in different driving modes can be calculated by the heating power corresponding to the target heating mode and a heating power coefficient. The heating power coefficient in the normal driving mode is 1, i.e., the heating power in the normal driving mode is the heating power corresponding to the target heating mode. The heating power coefficient in the economic driving mode is less than 1, i.e., the heating power in the economic driving mode is less than the heating power corresponding to the target heating mode. The heating power coefficient in the sports driving mode is greater than 1, i.e., the heating power in the sports driving mode is greater than the heating power corresponding to the target heating mode.

[0136] According to the embodiments of the present application, by using different trigger conditions to start battery heating for the same heating mode in different driving modes, and setting different heating powers for different driving modes, the energy consumption of power battery thermal management is appropriately reduced in the economic driving mode, the power performance of the power battery is prioritized in the sports driving mode, the energy consumption of power battery thermal management is appropriately increased, and the economy and power performance are considered in the normal mode, so that the use of vehicles in different periods or by different users can be met, and the user experience is improved.

[0137] The heat distribution of the heating system will be described in detail below taking different vehicle operating conditions as examples.

[0138] First, the low-temperature parking condition, in which the motor and the motor controller have no heat to utilize and no braking energy to recover, if the first heating mode is triggered at this time, the heating system will not respond to the trigger, and the passenger compartment mainly utilizes the auxiliary PTC heater for heating. If the second heating mode is triggered at this time, the heating system will enter the battery heating process according to the heating power demand corresponding to the second heating mode, the motor and the motor controller actively generate heat for the power battery heating, and the passenger compartment still utilizes the PTC heater for heating.

[0139] Second, low-temperature and low-speed driving condition, the heat generated by the motor and the motor controller and the energy recovered by the brake are less, if the first heating mode is triggered at this time, the heating system will not respond to the trigger, the passenger compartment mainly uses the heat pump system to absorb the heat generated by the motor and the motor controller for heating, and when the heat is insufficient, the auxiliary PTC heater is used for heating. If the second battery heating mode is triggered at this time, the heating system will enter the battery heating process according to the heating power corresponding to the second heating mode under the current driving mode, and when the waste heat is insufficient, the motor and the motor controller actively generate heat to heat the power battery, and the passenger compartment uses the auxiliary PTC for heating.

[0140] Third, low-temperature and high-speed driving condition, the heat generated by the motor and the motor controller and the energy recovered by the brake are more, if the first heating mode is triggered at this time, the heating system will use the remaining heat as a heat source to heat the battery when the heat generated by the motor and the motor controller and the energy recovered by the brake cannot be fully utilized by the passenger compartment, and the passenger compartment uses the heat generated by the motor and the motor controller for heating. If the second heating mode is triggered at this time, the heating system will enter the battery heating process according to the heating power requirement corresponding to the second heating mode under the set driving mode, and the heat of the motor and the motor controller and the energy recovered by the brake will be used as a heat source to heat the battery, and when the waste heat is insufficient, the motor and the motor controller actively generate heat, and the passenger compartment uses the auxiliary PTC for heating.

[0141] Fourth, low-temperature CLTC driving condition, the battery SOC is high at the beginning of the driving stage, at this time the first heating mode may be triggered, but the passenger compartment temperature is low and the heating load is large, the heating system will not respond to the first heating mode. The passenger compartment mainly uses the heat generated by the motor and the motor controller and the energy recovered by the brake for heating, and when the heat is insufficient, the auxiliary PTC heater is used, after the temperature of the passenger compartment rises to the temperature maintaining stage, the heat required by the passenger compartment decreases, part of the heat and the energy recovered by the brake which cannot be utilized will be used as a heat source to heat the battery. After the vehicle drives for a period of time, the second heating mode or the third heating mode is triggered, the heating system will enter the battery heating process according to the heating power requirement corresponding to the heating mode under the current driving mode, the heat of the motor and the motor controller and the energy recovered by the brake will be used as a heat source to heat the battery, and when the waste heat is insufficient, the motor and the motor controller actively generate heat, and the passenger compartment uses the PTC for heating.

[0142] In some embodiments, after the first heating mode is triggered in step S1200, the method further comprises: exiting the first heating mode when the battery information of the power battery satisfies at least one of the following conditions:

[0143] The current temperature value of the power battery is greater than or equal to a preset closing temperature threshold corresponding to the first heating mode;

[0144] the battery information of the power battery satisfies a triggering condition of a second heating mode; wherein the second heating mode is a mode of heating the power battery by heat generated by the vehicle based on the heating demand;

[0145] the SOC value of the power battery is less than or equal to a closing SOC value corresponding to the current temperature value of the power battery.

[0146] In this embodiment, the heating control device of the power battery can obtain the battery information of the power battery in real time after triggering the first heating mode, and determine whether to exit the first heating mode according to the battery information.

[0147] In one example, the triggering condition of exiting the first heating mode is that the current temperature value of the power battery is greater than or equal to a preset closing temperature threshold corresponding to the first heating mode. For example, the preset closing temperature threshold is -8℃, and the first heating mode is exited when the current temperature value is greater than -8℃.

[0148] In another example, the triggering condition of exiting the first heating mode is that the battery information of the power battery satisfies the triggering condition of the second heating mode. After the battery is heated according to the heating power corresponding to the first heating mode, the temperature value of the power battery rises to -10℃, and the starting power value corresponding to the temperature value is S3 according to Table 1. If the power value of the power battery is less than or equal to the starting power value S3, the target heating mode is determined to be the second heating mode again, and the first heating mode is exited.

[0149] In yet another example, the triggering condition of exiting the first heating mode is that the SOC value of the power battery is less than or equal to a closing SOC value corresponding to the current temperature value of the power battery. As shown in Table 1, if the current temperature value is -20℃ after triggering the first heating mode, the corresponding closing SOC value is M1, and if the current SOC value is less than M1, the first heating mode is exited.

[0150] In one embodiment, after triggering the second heating mode, the method further comprises: exiting the second heating mode when the battery information of the power battery satisfies at least one of the following conditions:

[0151] the current temperature value of the power battery is greater than or equal to a preset closing temperature threshold corresponding to the second heating mode;

[0152] the SOC value of the power battery is less than or equal to a closing SOC value corresponding to the current temperature value of the power battery.

[0153] In this embodiment, the closing temperature threshold corresponding to the second heating mode is 0℃.

[0154] In the example where the trigger condition for exiting the second heating mode is that the current temperature value of the power battery is greater than or equal to the preset closing temperature threshold corresponding to the second heating mode, the closing temperature threshold corresponding to the second heating mode is 0°C.

[0155] In the example where the condition for exiting the second heating mode is that the SOC value of the power battery is less than or equal to the closing SOC value corresponding to the current temperature value of the power battery, the closing SOC value corresponding to the temperature value of the power battery can be obtained by Table 1. If the temperature value of the power battery is -10°C, the corresponding closing SOC value is M3. After triggering the heating system to heat the power battery, if the SOC value of the power battery is less than or equal to the closing SOC value M3, the second heating mode is closed.

[0156] In some embodiments, the second heating mode includes a first sub-heating mode and a second sub-heating mode. After triggering the first sub-heating mode, the method further includes step S6100.

[0157] Step S6100, when the battery information of the power battery meets at least one of the following conditions, the first sub-heating mode is exited.

[0158] The current temperature value of the power battery is greater than or equal to the preset closing temperature threshold corresponding to the first sub-heating mode.

[0159] The battery information of the power battery meets the trigger condition of the second sub-heating mode.

[0160] The SOC value of the power battery is less than or equal to the closing SOC value corresponding to the current temperature value of the power battery.

[0161] In this embodiment, the closing temperature threshold corresponding to the first sub-heating mode is, for example, 0°C. The trigger condition of the second sub-heating mode is that the SOC value of the power battery is in a third SOC range.

[0162] In some embodiments, after triggering the second sub-heating mode, the method further includes step S7100.

[0163] Step S7100, when the battery information of the power battery meets at least one of the following conditions, the second sub-heating mode is exited.

[0164] The current temperature value of the power battery is greater than or equal to the preset closing temperature threshold corresponding to the second sub-heating mode.

[0165] The SOC value of the power battery is less than or equal to the closing SOC value corresponding to the current temperature value of the power battery.

[0166] In this embodiment, the preset closing temperature threshold corresponding to the second heating mode can be 5℃, for example.

[0167] According to the embodiment of the application, the heating demand of the power battery and the waste heat generated by the vehicle based on other demands are determined; in the case that the waste heat meets the heating demand, the first heating mode is triggered, and the first heating mode is to heat the power battery by using the waste heat. By setting the first heating mode, the waste heat generated by the vehicle based on other demands is used, so as to avoid waste of heat, and the energy required for active heating is reduced, and active heating of the power battery is reduced or not triggered, and the cruising range of the vehicle is improved.

[0168] As shown in Figure 2 the heating control method of the power battery of another embodiment of the application, the method comprises steps S1 to S12.

[0169] In step S1, when the power battery is in the discharging process, the gear information of a plurality of heating modes in the current driving mode is determined.

[0170] In this example, a plurality of heating modes are preset, and the plurality of heating modes include a first heating mode, a second heating mode and a third heating mode. The first heating mode is a mode of heating the power battery by using the waste heat, and the second heating mode and the third heating mode are modes of heating the power battery by using the heat generated by the vehicle based on the heating demand. After the vehicle is powered on, step S1 is performed. The gear information and the heating power of the same heating mode in different driving modes are different, that is, the triggering conditions and the heating power are different. The driving mode can include a normal driving mode, an economic driving mode and a sports driving mode.

[0171] In step S2, according to the determined gear information, it is determined whether the power battery meets the triggering condition of the second heating mode on the electric quantity or the pressure difference; if yes, step S6 is performed, and if no, step S3 is performed.

[0172] In this example, the triggering condition of the second heating mode on the electric quantity includes that the electric quantity value is less than the starting electric quantity value corresponding to the temperature value of the power battery, and the triggering condition of the second heating mode on the pressure difference includes that the cell pressure difference of the power battery is greater than or equal to the pressure difference threshold.

[0173] In step S3, it is determined whether the SOC value of the power battery is in a first electric quantity range corresponding to the first heating mode; if yes, step S4 is performed, and if no, step S1 is performed.

[0174] In this example, the first electric quantity range can be a < SOC ≤ 100%.

[0175] Step S4: whether the temperature value of the power battery is less than or equal to a starting temperature value corresponding to the first heating mode; if yes, step S5 is executed; if no, step S1 is executed.

[0176] In this example, the starting temperature value is -10℃.

[0177] Step S5: determining that the target heating mode is the first heating mode.

[0178] In this example, the first heating mode is a heating mode of using waste heat generated by the vehicle based on other requirements to store heat for the power battery, wherein the waste heat may be, for example, heat generated by the motor and the motor controller when working.

[0179] Step S6: whether the SOC value of the power battery is in a second electric quantity range corresponding to the second heating mode; if yes, step S7 is executed; if no, step S9 is executed.

[0180] In this example, the second electric quantity range can be a<SOC≤100%.

[0181] Step S7: whether the temperature value of the power battery is less than or equal to a starting temperature value corresponding to the second heating mode; if yes, step S8 is executed; if no, step S1 is executed.

[0182] In this example, the starting temperature value can be 10℃.

[0183] Step S8: determining that the target heating mode is the second heating mode.

[0184] Step S9: whether the temperature value of the power battery is less than or equal to a starting temperature value corresponding to the third heating mode; if yes, step S10 is executed; if no, step S1 is executed.

[0185] In this example, the starting temperature value can be 10℃.

[0186] Step S10: determining that the target heating mode is the third heating mode.

[0187] Step S11: triggering the heating system to heat the power battery at a heating power of the target heating mode in the current driving mode.

[0188] Step S12: in a case where the temperature value of the power battery is greater than or equal to a closing temperature threshold value corresponding to the target heating mode, or the electric quantity value of the power battery is greater than or equal to a closing electric quantity value, closing the target heating mode.

[0189] In other examples, in a case where the re-determined target heating mode is inconsistent with the current target heating mode, the target heating mode is closed.

[0190] In some embodiments, a heating control device 300 of a power battery is also provided, as shown in Figure 3 comprises:

[0191] A determination module 301 is configured to determine a heating requirement of the power battery and waste heat generated by the vehicle based on other requirements;

[0192] A heating triggering module 302 is configured to trigger a first heating mode if the waste heat meets the heating requirement, the first heating mode being a mode of heating the power battery by using the waste heat.

[0193] In some embodiments, the determination module 301 is configured to determine the heating requirement according to a current temperature value of the power battery and a target temperature value, wherein the current temperature value is less than a preset starting temperature threshold.

[0194] In some embodiments, the determination module 301 is configured to, before determining the heating requirement, determine, according to corresponding curve data of the temperature value of the power battery and a starting SOC value, that the SOC value of the power battery is not less than a starting SOC value corresponding to the current temperature value; and perform the steps of determining the heating requirement and determining the waste heat generated by the vehicle based on other requirements if the SOC value of the power battery is not less than the starting SOC value corresponding to the current temperature value.

[0195] In some embodiments, the determination module 301 is configured to, before determining the heating requirement, determine, according to corresponding curve data of the temperature value of the power battery and a starting SOC value, that the SOC value of the power battery is less than a starting SOC value corresponding to the current temperature value; and trigger a second heating mode if the SOC value of the power battery is less than the starting SOC value corresponding to the current temperature value, wherein the second heating mode is a mode of heating the power battery by using heat generated by the vehicle based on the heating requirement.

[0196] In some embodiments, the determination module 301 is configured to, before determining the heating requirement, determine, according to a cell pressure difference of the power battery, that the cell pressure difference of the power battery is greater than or equal to a pressure difference threshold; and trigger a second heating mode if the cell pressure difference of the power battery is greater than or equal to the pressure difference threshold, wherein the second heating mode is a heating mode for meeting the battery heating requirement.

[0197] In some embodiments, the heating exit module 303 is further configured to, after triggering the second heating mode, exit the second heating mode when the battery information of the power battery meets at least one of the following conditions: the current temperature value of the power battery is greater than or equal to a preset closing temperature threshold corresponding to the second heating mode; and the SOC value of the power battery is less than or equal to a closing SOC value corresponding to the current temperature value of the power battery.

[0198] In some embodiments, the second heating mode comprises at least two sub-heating modes, wherein different sub-heating modes differ in at least one of heating power, corresponding electric quantity range.

[0199] In some embodiments, the second heating mode comprises a first sub-heating mode and a second sub-heating mode, the heating power of the second sub-heating mode is greater than the heating power of the first sub-heating mode, and the lower limit value of the second electric quantity range corresponding to the first sub-heating mode is greater than the upper limit value of the third electric quantity range corresponding to the second sub-heating mode.

[0200] In some embodiments, the device further comprises a heating exit module 303, which is configured to, after triggering the first sub-heating mode, exit the first sub-heating mode when the battery information of the power battery satisfies at least one of the following conditions: the current temperature value of the power battery is greater than or equal to a preset closing temperature threshold corresponding to the first sub-heating mode; the battery information of the power battery satisfies the triggering condition of the second sub-heating mode; and the SOC value of the power battery is less than or equal to a closing SOC value corresponding to the current temperature value of the power battery.

[0201] The heating exit module 303 is further configured to, after triggering the second sub-heating mode, exit the second sub-heating mode when the battery information of the power battery satisfies at least one of the following conditions: the current temperature value of the power battery is greater than or equal to a preset closing temperature threshold corresponding to the second sub-heating mode; and the SOC value of the power battery is less than or equal to a closing SOC value corresponding to the current temperature value of the power battery.

[0202] In some embodiments, the heating exit module 303 is configured to, after triggering the first heating mode, exit the first heating mode when the battery information of the power battery satisfies at least one of the following conditions: the current temperature value of the power battery is greater than or equal to a preset closing temperature threshold corresponding to the first heating mode; the battery information of the power battery satisfies the triggering condition of the second heating mode; the second heating mode is a mode for heating the power battery by using heat generated by the vehicle based on the heating demand; and the SOC value of the power battery is less than or equal to a closing SOC value corresponding to the current temperature value of the power battery.

[0203] In some embodiments, the determining module 301 is further configured to determine gear information of a plurality of heating modes in a current driving mode before determining the heating demand; wherein the plurality of heating modes comprises the first heating mode and the second heating mode, and different driving modes correspond to different gear information for the same heating mode; determine a target heating mode matching the battery information of the power battery according to the determined gear information; in the case that the target heating mode is the first heating mode, perform the steps of determining the heating demand and determining the waste heat generated by the vehicle based on other demands; in the case that the target heating mode is the second heating mode, trigger the second heating mode.

[0204] In some embodiments, a heating control device 400 of a power battery is also provided, as shown in Figure 4 The heating control device 400 of the power battery comprises a memory 420 and a processor 410, and the memory 420 is configured to store a computer program for controlling the processor 410 to operate to perform the heating control method of the power battery according to any embodiment of the present disclosure.

[0205] In some embodiments, as shown in Figure 5 A vehicle 500 is also provided, which comprises a power battery 510 and a heating system 520, and a heating control device 530.

[0206] The heating control device 530 can be a heating control device as shown in Figure 3 or Figure 4 .

[0207] The present application can be a system, a method, and / or a computer program product. The computer program product can include a computer readable storage medium having computer readable program instructions embodied therewith, which are executable by a processor to implement various aspects of the present application.

[0208] Computer readable storage media can be tangible storage media which can retain and store instructions for use by an instruction execution device. Computer readable storage media can be, for example, but is not limited to, an electronic storage device, a magnetic storage device, an optical storage device, an electromagnetic storage device, a semiconductor storage device, or any suitable combination of the foregoing. More specific examples (a non-exhaustive list) of computer readable storage media include the following: a portable computer diskette, a hard disk, a random access memory (RAM), a read-only memory (ROM), an erasable programmable read-only memory (EPROM or Flash memory), a static random access memory (SRAM), a portable compact disc read-only memory (CD-ROM), a digital versatile disk (DVD), a memory stick, a floppy disk, a mechanically encoded device such as punch-cards or raised structures in a groove having instructions recorded thereon, and any suitable combination of the foregoing. A computer readable storage medium, as used herein, is not to be construed as being transitory signals per se, such as radio waves or other freely propagating electromagnetic waves, electromagnetic waves propagating through a waveguide or other transmission media (e.g., light pulses passing through a fiber-optic cable), or electrical signals transmitted through a wire.

[0209] Computer readable program instructions described herein can be downloaded to respective computing / processing devices from a computer readable storage medium or to an external computer or external storage device via a network, for example, the Internet, a local area network, a wide area network and / or a wireless network. The network can comprise copper transmission cables, optical transmission fibers, wireless transmission, routers, firewalls, switches, gateway computers and / or edge servers. A network adapter card or network interface in each computing / processing device receives computer readable program instructions from the network and forwards the computer readable program instructions for storage in a computer readable storage medium within the respective computing / processing device.

[0210] Computer readable program instructions for carrying out operations of the present application can be assembler instructions, instruction-set-architecture (ISA) instructions, machine instructions, machine dependent instructions, microcode, firmware instructions, state-setting data, or either source code or object code written in any combination of one or more programming languages, including an object oriented programming language such as Smalltalk, C++ or the like and conventional procedural programming languages, such as the "C" programming language or similar programming languages. The computer readable program instructions can execute entirely on the user's computer, partly on the user's computer, as a stand-alone software package, partly on the user's computer and partly on a remote computer or entirely on the remote computer or server. In the latter scenario, 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 the connection can be made to an external computer (for example, through the Internet using an Internet Service Provider). In some embodiments, electronic circuitry including, for example, programmable logic circuitry, field-programmable gate array (FPGA), or programmable logic array (PLA) can execute the computer readable program instructions by utilizing state information of the computer readable program instructions to personalize the electronic circuitry, in order to perform aspects of the present application.

[0211] The computer readable program instructions can also be loaded onto a computer, other programmable data processing apparatus, or other device to cause a series of operational steps to be performed on the computer, other programmable apparatus or other device to produce a computer implemented process such that the instructions which execute on the computer or other programmable apparatus provide processes for implementing the functions / acts specified in the flowchart and / or block diagram block or blocks.

[0212] The computer readable program instructions can also be loaded onto a computer, other programmable data processing apparatus, or other device to cause a series of operational steps to be performed on the computer, other programmable apparatus or other device to produce a computer implemented process such that the instructions which execute on the computer or other programmable apparatus provide processes for implementing the functions / acts specified in the flowchart and / or block diagram block or blocks.

[0213] The computer readable program instructions can also be loaded onto a computer, other programmable data processing apparatus, or other device to cause a series of operational steps to be performed on the computer, other programmable data processing apparatus or other device to produce a computer implemented process such that the instructions which execute on the computer, other programmable data processing apparatus, or other device implement the functions / acts specified in the flowchart and / or block diagram block or blocks.

[0214] The flow diagrams and the block diagrams in the drawings are presented to illustrate the architecture, functionality, and operation of possible implementations of systems, methods and computer program products according to various embodiments of the present application. In this regard, each block in the flow diagrams and the block diagrams can represent a module, segment, or portion of instructions, which comprises one or more executable instructions for implementing the specified logic functions. In some alternative implementations, the functions noted in the blocks can occur out of the order noted in the figures. For example, two blocks shown in succession may, in fact, be executed substantially concurrently, or the blocks can sometimes be executed in the reverse order, depending upon the functionality involved. It will also be noted that each block of the block diagrams and / or flow diagrams, and combinations thereof, can be implemented by special purpose hardware-based systems that perform the specified functions or acts, or combinations of special purpose hardware and

[0215] Embodiments of the application have been described above. The description is illustrative of the embodiments of the application and is not meant to be limiting. Numerous modifications and variations are possible in light of the above teachings without departing from the scope and spirit of the described embodiments of the application. No limitation is intended to the details of construction or design except as described in the claims.

Claims

1. A method of heating control of a power battery, characterized in that, The method comprises: determining the heating requirement of the power battery and waste heat generated by the vehicle based on other requirements; in the case that the waste heat meets the heating requirement, triggering a first heating mode, the first heating mode being a mode of heating the power battery by using the waste heat; before determining the heating requirement, the method further comprises: determining, according to corresponding curve data of temperature values and start SOC values of the power battery, that the SOC value of the power battery is less than the start SOC value corresponding to the current temperature value of the power battery; in the case that the SOC value of the power battery is less than the start SOC value corresponding to the current temperature value, triggering a second heating mode; wherein the second heating mode is a mode of heating the power battery by using heat generated by the vehicle based on the heating requirement.

2. The method of claim 1, wherein, The determination of the heating requirement of the power battery specifically comprises: determining the heating requirement according to the current temperature value and the target temperature value of the power battery, wherein the current temperature value is less than a preset start temperature threshold.

3. The method of claim 2, wherein, Before determining the heating requirement, the method further comprises: determining, according to corresponding curve data of temperature values and start SOC values of the power battery, that the SOC value of the power battery is not less than the start SOC value corresponding to the current temperature value; in the case that the SOC value of the power battery is not less than the start SOC value corresponding to the current temperature value, performing the steps of determining the heating requirement and determining the waste heat generated by the vehicle based on other requirements.

4. The method of claim 2, wherein, Before determining the heating requirement, the method further comprises: determining, according to the cell pressure difference of the power battery, that the cell pressure difference of the power battery is greater than or equal to a pressure difference threshold; in the case that the cell pressure difference of the power battery is greater than or equal to the pressure difference threshold, triggering a second heating mode; wherein the second heating mode is a mode of heating the power battery by using heat generated by the vehicle based on the heating requirement.

5. The method according to claim 1 or 4, characterized in that, After triggering the second heating mode, the method further comprises: when the battery information of the power battery meets at least one of the following conditions, exiting the second heating mode: the current temperature value of the power battery is greater than or equal to a preset closing temperature threshold corresponding to the second heating mode; the SOC value of the power battery is less than or equal to a closing SOC value corresponding to the current temperature value of the power battery.

6. The method according to claim 1 or 4, characterized in that, The second heating mode comprises at least two sub-heating modes, wherein different sub-heating modes differ in at least one of heating power and corresponding power range.

7. The method of claim 6, wherein, The second heating mode comprises a first sub-heating mode and a second sub-heating mode, the heating power of the second sub-heating mode being greater than the heating power of the first sub-heating mode, and the lower limit value of a second power range corresponding to the first sub-heating mode being greater than the upper limit value of a third power range corresponding to the second sub-heating mode.

8. The method of claim 7, wherein, After triggering the first sub-heating mode, the method further comprises: when the battery information of the power battery meets at least one of the following conditions, exiting the first sub-heating mode: The current temperature value of the power battery is greater than or equal to a preset closing temperature threshold corresponding to the first sub-heating mode; The battery information of the power battery meets a triggering condition of the second sub-heating mode; The SOC value of the power battery is less than or equal to a closing SOC value corresponding to the current temperature value of the power battery; After triggering the second sub-heating mode, the method further comprises: When the battery information of the power battery meets at least one of the following conditions, the second sub-heating mode is exited: The current temperature value of the power battery is greater than or equal to a preset closing temperature threshold corresponding to the second sub-heating mode; The SOC value of the power battery is less than or equal to a closing SOC value corresponding to the current temperature value of the power battery.

9. The method according to any one of claims 1-4, characterized in that, After triggering the first heating mode, the method further comprises: When the battery information of the power battery meets at least one of the following conditions, the first heating mode is exited: The current temperature value of the power battery is greater than or equal to a preset closing temperature threshold corresponding to the first heating mode; The battery information of the power battery meets a triggering condition of a second heating mode; wherein the second heating mode is a mode of heating the power battery by using heat generated by the vehicle based on the heating demand; The SOC value of the power battery is less than or equal to a closing SOC value corresponding to the current temperature value of the power battery.

10. The method of claim 1 or 4, wherein, Before determining the heating demand, the method further comprises: Determining gear information of a plurality of heating modes in a current driving mode; wherein the plurality of heating modes include the first heating mode and the second heating mode, and different driving modes correspond to different gear information for the same heating mode; According to the determined gear information, determining a target heating mode matched with the battery information of the power battery; In the case that the target heating mode is the first heating mode, performing the steps of determining the heating demand and determining waste heat generated by the vehicle based on other demands; In the case that the target heating mode is the second heating mode, triggering the second heating mode.

11. A heating control device for a power cell, characterized by Comprise: A determination module for determining a heating demand of the power battery and waste heat generated by a vehicle based on other demands; A heating triggering module for triggering a first heating mode in the case that the waste heat meets the heating demand, the first heating mode being a mode of heating the power battery by using the waste heat; The determination module is configured to, before determining the heating demand, determine, according to corresponding curve data of a temperature value and a starting SOC value of the power battery, that the SOC value of the power battery is less than a starting SOC value corresponding to the current temperature value of the power battery; In the case that the SOC value of the power battery is less than the starting SOC value corresponding to the current temperature value, triggering a second heating mode; wherein the second heating mode is a mode of heating the power battery by using heat generated by the vehicle based on the heating demand.

12. A heating control device for a power battery, comprising a memory and a processor, the memory storing executable instructions for controlling the processor to operate to perform the method of any one of claims 1-10.

13. A vehicle characterized by comprising: A power battery, a heating control device according to claim 11 or 12, and a heating system.

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