Heat dissipation method and device for power supply module of vehicle, vehicle and storage medium

Abstract

The invention relates to a heat dissipation method and device for a power supply module of a vehicle, the vehicle and a storage medium, and the method comprises the steps: obtaining a superheat degree adjustment value and a current change value corresponding to a current superheat degree adjustment range of the power supply module in a vehicle operation process, and determining that the superheat degree adjustment value is within a preset range; and under the condition that the current change value is detected and the heat release rate of the power supply module is determined to meet a preset condition based on the current change value, an adjustment coefficient for a preset control valve is determined according to the current change value, a target opening degree of the preset control valve is determined based on the superheat degree adjustment value and the adjustment coefficient, and the preset control valve is controlled to be opened according to the target opening degree so as to dissipate heat of the power supply module. In this way, the preset control valve can be accurately controlled, the overshoot phenomenon of PI adjustment on the preset control valve is reduced, and therefore the heat dissipation efficiency of the vehicle power supply module is improved.

Description

Technical Field

[0001] The present application relates to the field of vehicle technology, and in particular to a method and device for heat dissipation of a power supply module of a vehicle, a vehicle and a storage medium. Background Art

[0002] At present, during vehicle operation, the thermal management of vehicle batteries by the battery cooling system plays an important role in the safety of vehicle operation. For the thermal management of vehicle batteries, there is a refrigerant plate direct cooling method to dissipate the heat generated by the battery during vehicle operation. In this refrigerant plate direct cooling method, the refrigerant plate can be connected to an expansion valve, and the flow of refrigerant in the refrigerant plate can be controlled by controlling the opening of the expansion valve, thereby controlling the outlet superheat of the refrigerant plate.

[0003] In the related art, when the expansion valve is controlled, the PI adjustment of the expansion valve opening is performed by the difference between the target overheat of the battery and the current overheat. However, in actual applications, when the vehicle experiences sudden acceleration or deceleration, which causes the stability of the system to fluctuate, the heat release rate of the battery will also fluctuate violently within the change cycle, which will cause the target overheat of the battery to fluctuate. Therefore, when the PI adjustment of the expansion valve opening is performed according to the target overheat and the actual overheat of the battery, the delay in the feedback of the target overheat causes the PI adjustment to overshoot, which affects the stability of the vehicle's battery cooling system, thereby reducing the performance and stability of the battery and affecting the performance of the entire vehicle. Summary of the invention

[0004] The present application provides a method, device, vehicle and storage medium for heat dissipation of a power supply module of a vehicle, so as to solve the technical problem in the prior art that when PI adjustment is performed on the expansion valve opening according to the target overheat and actual overheat of the battery, the delay in the target overheat feedback causes overshoot in the PI adjustment, thereby affecting the stability of the vehicle's battery cooling system, thereby reducing the performance and stability of the battery and affecting the performance of the entire vehicle.

[0005] In a first aspect, the present application provides a method for heat dissipation of a power module of a vehicle, which is applied to a battery cooling system of the vehicle, wherein the battery cooling system controls the flow rate of a refrigerant for heat dissipation of a power module in the vehicle by controlling the opening of a preset control valve, and the method comprises:

[0006] During the operation of the vehicle, an overheat adjustment value and a current change value corresponding to a current overheat adjustment range of the power supply module are obtained;

[0007] When it is determined that the superheat adjustment value is within a preset range and the heat release rate of the power supply module meets a preset condition based on the current change value, determining the adjustment coefficient for the preset control valve according to the current change value;

[0008] Based on the superheat adjustment value and the adjustment coefficient, the target opening of the preset control valve is determined, and the preset control valve is controlled to open according to the target opening to dissipate heat from the power supply module.

[0009] As an optional implementation, the obtaining of the overheat adjustment value and the current change value corresponding to the current overheat adjustment range of the power supply module includes:

[0010] Obtaining a current overheat and a target overheat of the power supply module;

[0011] Subtract the current superheat from the target superheat to obtain a superheat adjustment value corresponding to the current superheat adjustment range of the power supply module;

[0012] Determine the average current value of the preset cycle to which the power supply module currently belongs, and obtain the previous average current value of the previous preset cycle;

[0013] The absolute value of the difference between the average current value and the previous average current value is determined as the current change value of the power supply module.

[0014] As an optional implementation manner, determining, based on the current change value, whether the heat release rate of the power supply module meets a preset condition includes:

[0015] Determine the average speed of the vehicle in the current preset period, and obtain the previous average speed of the vehicle in the previous preset period;

[0016] Determine the absolute value of the difference between the average vehicle speed and the previous average vehicle speed as the changed vehicle speed of the vehicle;

[0017] When the changed vehicle speed is greater than or equal to a preset vehicle speed change threshold, and the current change value is greater than or equal to a preset current change threshold, it is determined that the heat release rate of the power supply module meets the preset conditions.

[0018] As an optional implementation, determining the adjustment coefficient for the preset control valve according to the current change value includes:

[0019] According to the current change value, a target corresponding relationship including the current change value is determined from the preset corresponding relationships between multiple current change values ​​and adjustment coefficients of the power supply module; wherein, when the current change value is less than the preset value, the adjustment coefficient is in direct proportion to the current change value, and when the current change value is greater than the preset value, the adjustment coefficient is in inverse proportion to the current change value;

[0020] The adjustment coefficient included in the target corresponding relationship is determined as the adjustment coefficient for the preset control valve.

[0021] As an optional implementation, determining the target opening of the preset control valve based on the superheat adjustment value and the adjustment coefficient includes:

[0022] According to the superheat adjustment value, a first proportional factor and a first integral factor are determined from a correspondence between a preset superheat adjustment value and an adjustment parameter; wherein the adjustment parameter includes a proportional factor and an integral factor;

[0023] Acquiring the vehicle type of the vehicle, and determining the initial opening of the preset control valve according to the vehicle type;

[0024] According to a preset adjustment function, the superheat adjustment value, the first proportional factor, the first integral factor, and the initial opening are calculated to obtain a first opening of the preset control valve;

[0025] The first opening is adjusted according to the adjustment coefficient to obtain a target opening of the preset control valve.

[0026] As an optional implementation, adjusting the first opening according to the adjustment coefficient to obtain the target opening of the preset control valve includes:

[0027] The first opening is multiplied by the adjustment coefficient to obtain a target opening of the preset control valve.

[0028] As an optional implementation, the method further includes:

[0029] When it is determined that the superheat adjustment value is not within a preset range and / or when it is determined that the heat release rate of the power supply module does not meet a preset condition, a second proportional factor and a second integral factor are determined from a corresponding relationship between a preset superheat adjustment value and an adjustment parameter according to the superheat adjustment value; wherein the adjustment parameter includes a proportional factor and an integral factor;

[0030] Acquiring the vehicle type of the vehicle, and determining the initial opening of the preset control valve according to the vehicle type;

[0031] According to a preset adjustment function, the superheat adjustment value, the second proportional factor, the second integral factor, and the initial opening are calculated to obtain a second opening of the preset control valve;

[0032] The preset control valve is controlled to open according to the second opening degree to dissipate heat from the power supply module.

[0033] In a second aspect, the present application provides a heat dissipation device for a power module of a vehicle, which is applied to a battery cooling system of the vehicle. The battery cooling system controls the flow rate of a refrigerant for dissipating heat from a power module in the vehicle by controlling the opening of a preset control valve. The device comprises:

[0034] An acquisition module, used for acquiring an overheat adjustment value and a current change value corresponding to a current overheat adjustment range of the power supply module during operation of the vehicle;

[0035] A determination module, configured to determine, when it is determined that the superheat adjustment value is within a preset range and, based on the current change value, determine that the heat release rate of the power supply module meets a preset condition, a regulation coefficient for the preset control valve according to the current change value;

[0036] The heat dissipation module is used to determine the target opening of the preset control valve based on the superheat adjustment value and the adjustment coefficient, and control the preset control valve to open according to the target opening to dissipate heat for the power supply module.

[0037] In a third aspect, the present application provides a vehicle, comprising: a power supply module and a battery cooling system;

[0038] The battery cooling system dissipates heat for the power supply module;

[0039] The battery cooling system includes a processor and a memory, and the processor is used to execute a vehicle charging program stored in the memory to implement the vehicle power supply module heat dissipation method described in any one of the first aspects.

[0040] In a fourth aspect, the present application provides a storage medium, characterized in that the storage medium stores one or more programs, and the one or more programs can be executed by one or more processors to implement the vehicle power supply module heat dissipation method described in any one of the first aspects.

[0041] The technical solution provided by the embodiment of the present application obtains the superheat adjustment value and the current change value corresponding to the current superheat adjustment range of the power supply module during the operation of the vehicle, and when it is determined that the superheat adjustment value is within a preset range and the heat release rate of the power supply module meets the preset conditions based on the current change value, determines the adjustment coefficient for the preset control valve according to the current change value, determines the target opening of the preset control valve based on the superheat adjustment value and the adjustment coefficient, and controls the opening of the preset control valve according to the target opening to dissipate heat from the power supply module. This technical solution pre-sets an overheat adjustment range for the vehicle's power supply module that is affected by the heat release rate of the power supply module, and feeds back the heat release rate of the power supply module through the trend of current change. When it is determined that the overheat adjustment value corresponding to the current overheat adjustment range of the power supply module satisfies the preset range, and the heat release rate satisfies the preset conditions and may affect the overheat adjustment, the adjustment coefficient for adjusting the opening of the control valve is determined by the current change value of the heating module, so as to determine the target opening of the preset control valve based on the adjustment coefficient, thereby introducing the control of the preset control valve into the influencing factors of the battery heat release rate to achieve precise control of the opening of the preset control valve, thereby achieving accurate control of the preset control valve and reducing the overshoot phenomenon of PI adjustment of the preset control valve, thereby improving the heat dissipation efficiency of the vehicle's power supply module. BRIEF DESCRIPTION OF THE DRAWINGS

[0042] The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the present application and, together with the description, serve to explain the principles of the present application.

[0043] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the drawings required for use in the embodiments or the prior art texts are briefly introduced below. Obviously, for ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative labor.

[0044] One or more embodiments are exemplarily described by pictures in the corresponding drawings, and these exemplified descriptions do not constitute limitations on the embodiments. Elements with the same reference numerals in the drawings represent similar elements, and unless otherwise stated, the figures in the drawings do not constitute proportional limitations.

[0045] Figure 1 A schematic diagram of the structure of a battery cooling system for a vehicle provided in an embodiment of the present application;

[0046] Figure 2 A flow chart of an embodiment of a method for heat dissipation of a power supply module of a vehicle provided in an embodiment of the present application;

[0047] Figure 3This is a flow chart of another embodiment of a method for heat dissipation of a power supply module of a vehicle provided in an embodiment of the present application;

[0048] Figure 4 A flow chart of another embodiment of a method for heat dissipation of a power supply module of a vehicle provided in an embodiment of the present application;

[0049] Figure 5 A flow chart of another embodiment of a method for heat dissipation of a power supply module of a vehicle provided in an embodiment of the present application;

[0050] Figure 6 A block diagram of an embodiment of a heat dissipation device for a power supply module of a vehicle provided in an embodiment of the present application;

[0051] Figure 7 A schematic diagram of the structure of a vehicle provided in an embodiment of the present application. DETAILED DESCRIPTION

[0052] In order to make the purpose, technical scheme and advantages of the embodiments of the present application clearer, the technical scheme in the embodiments of the present application will be clearly and completely described in conjunction with the drawings in the embodiments of the present application. Obviously, the embodiments described in the text are part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of this application.

[0053] The disclosure below provides many different embodiments or examples to realize the different structures of the present application. In order to simplify the disclosure of the present application, the parts and settings of specific examples are described in detail below. Of course, they are only examples, and the purpose is not to limit the present application. In addition, the present application can repeat reference numbers and / or letters in different examples. This repetition is for the purpose of simplification and clarity, and does not itself indicate the relationship between the various embodiments and / or settings discussed.

[0054] In order to solve the technical problem in the prior art that when the expansion valve opening is PI-regulated according to the target overheat and actual overheat of the battery, the delay in the target overheat feedback causes the PI regulation to overshoot, affecting the stability of the vehicle's battery cooling system, thereby reducing the performance and stability of the battery and affecting the performance of the entire vehicle, the present application provides a vehicle power module heat dissipation method, device, vehicle and storage medium, which can pre-set the overheat adjustment range affected by the heat release rate of the power module for the vehicle, and feed back the heat release rate of the power module through the trend of current change. When it is determined When the superheat adjustment value corresponding to the current superheat adjustment range of the power supply module satisfies the preset range, and the heat release rate satisfies the preset conditions and may affect the superheat adjustment, the adjustment coefficient used to adjust the opening of the control valve is determined by the current change value of the heating module, so as to determine the target opening of the preset control valve based on the adjustment coefficient, thereby achieving precise control of the opening of the preset control valve by introducing the control of the preset control valve into the influencing factors of the battery heat release rate, realizing accurate control of the preset control valve, reducing the overshoot phenomenon of PI adjustment of the preset control valve, and thus improving the heat dissipation efficiency of the vehicle power supply module.

[0055] To facilitate understanding of the heat dissipation method for a power supply module of a vehicle provided in an embodiment of the present application, the battery cooling system of the vehicle involved in the heat dissipation method for a power supply module of a vehicle provided in the present application is first illustrated below.

[0056] See also Figure 1 , is a schematic diagram of the structure of a battery cooling system for a vehicle provided in an embodiment of the present application. Figure 1 As shown, the battery cooling system 10 may include an evaporator 11 , a compressor 12 , a condenser 13 , a direct cooling plate 14 , an expansion valve 15 , an expansion valve 16 and a power battery 17 .

[0057] Among them, the above-mentioned evaporator 11 is a heat exchange component in the cooling system 10, which is used to absorb the hot air of the battery through the refrigerant, thereby obtaining low-temperature steam corresponding to the refrigerant. The embodiment of the present application does not limit the size and type of the evaporator 11.

[0058] The compressor 12 is a power component in the cooling system 10 , which is used to absorb low-temperature steam output by the evaporator and the power battery and compress it into superheated steam. The embodiment of the present application does not limit the type of the compressor 12 .

[0059] The condenser 13 is used to release heat from the input superheated steam to the outside, thereby condensing the superheated steam into a supercooled liquid as a refrigerant. The embodiment of the present application does not limit the type and size of the condenser 13.

[0060] The direct cooling plate 14 is used to obtain corresponding low-temperature steam by utilizing the circulating flow of the coolant, thereby taking away the heat generated by the power battery. The embodiment of the present application does not limit the type and size of the direct cooling plate 14 .

[0061] The expansion valve 15 is used to control the flow rate of the coolant flowing to the evaporator 11 . The embodiment of the present application does not limit the type and size of the expansion valve 15 .

[0062] The expansion valve 16 is used to control the coolant flow to the direct cooling plate 14, and the temperature of the power battery is controlled by controlling the coolant flow.

[0063] The power battery 17 is the source of heat generation. The embodiment of the present application does not limit the type and size of the power battery.

[0064] In one embodiment, during the operation of the cooling system 10, the coolant in the condenser 13 first enters the evaporator 11 through the expansion valve 15. In the evaporator 11, the coolant can effectively absorb the heat of the air flowing through the evaporator 11, thereby realizing its own evaporation transformation and becoming a low-temperature steam state. At the same time, the coolant can also enter the power battery 17 through the expansion valve 16. In the power battery 17, the heat of the liquid coolant is directly absorbed by the direct cooling plate 14 to reduce the temperature of the power battery 17, thereby ensuring the stable operation of the battery system. Subsequently, these coolants that have absorbed heat (whether it is steam evaporated in the evaporator 11 or liquid coolant heated in the power battery 17) will be absorbed by the compressor 12 and compressed into superheated steam and then flow into the condenser 13. In the condenser 13, the superheated steam coolant transfers heat to the air outside the vehicle passing through the condenser 13, thereby cooling and liquefying and becoming liquid coolant. The liquid coolant then enters the evaporator 11 and the power battery 17 again through the regulation of the expansion valve 15 and the expansion valve 16, and starts a new round of cooling cycle.

[0065] At present, during vehicle operation, the thermal management of vehicle batteries by the battery cooling system plays an important role in the safety of vehicle operation. For the thermal management of vehicle batteries, there is a refrigerant plate direct cooling method to dissipate the heat generated by the battery during vehicle operation. In this refrigerant plate direct cooling method, the refrigerant plate can be connected to an expansion valve, and the flow of refrigerant in the refrigerant plate can be controlled by controlling the opening of the expansion valve, thereby controlling the outlet superheat of the refrigerant plate.

[0066] In the related art, when the expansion valve is controlled, the PI adjustment of the expansion valve opening is performed by the difference between the target overheat of the battery and the current overheat. However, in actual applications, when the vehicle experiences sudden acceleration or deceleration, which causes the stability of the system to fluctuate, the heat release rate of the battery will also fluctuate violently within the change cycle, which will cause the target overheat of the battery to fluctuate. Therefore, when the PI adjustment of the expansion valve opening is performed according to the target overheat and the actual overheat of the battery, the delay in the feedback of the target overheat causes the PI adjustment to overshoot, which affects the stability of the vehicle's battery cooling system, thereby reducing the performance and stability of the battery and affecting the performance of the entire vehicle.

[0067] In this regard, the present application adopts a method for dissipating heat from a vehicle's power supply module, by pre-setting an overheat adjustment range for the vehicle's power supply module that is affected by the heat release rate of the power supply module, and feeding back the heat release rate of the power supply module through the trend of current change. When it is determined that the overheat adjustment value corresponding to the current overheat adjustment range of the power supply module satisfies the preset range, and the heat release rate satisfies the preset conditions and may affect the overheat adjustment, the adjustment coefficient for adjusting the opening of the control valve is determined through the current change value of the heating module, so as to determine the target opening of the preset control valve based on the adjustment coefficient, thereby achieving precise control of the opening of the preset control valve by introducing the control of the preset control valve into the influencing factors of the battery heat release rate, thereby achieving accurate control of the preset control valve, reducing the overshoot phenomenon of PI adjustment of the preset control valve, and thus improving the heat dissipation efficiency of the vehicle's power supply module.

[0068] The heat dissipation method for the power supply module of the vehicle provided by the present application is further explained below with reference to specific embodiments in conjunction with the accompanying drawings. The embodiments do not constitute a limitation on the embodiments of the present application.

[0069] join Figure 2 , is a flow chart of an embodiment of a method for heat dissipation of a power supply module of a vehicle provided in an embodiment of the present application. As an embodiment, Figure 2 The process shown can be applied to the battery cooling system of a vehicle, e.g. Figure 1 The cooling system 10 shown. Figure 2 As shown, the process may include the following steps:

[0070] Step 201: During the operation of the vehicle, the superheat adjustment value and the current change value corresponding to the current superheat adjustment range of the power supply module are obtained.

[0071] Step 202: When it is determined that the superheat adjustment value is within a preset range and the heat release rate of the power supply module meets a preset condition based on the current change value, determine the adjustment coefficient for the preset control valve according to the current change value.

[0072] The following is a unified description of step 201 and step 202:

[0073] The above-mentioned power supply module refers to the module that supplies power to the vehicle, such as Figure 1 The power battery 17 of the cooling system 10 is provided.

[0074] The above-mentioned superheat adjustment range refers to the superheat adjustment range affected by the heat release rate of the power supply module when the power supply module of the vehicle is adjusted, which is used to measure the degree of heat dissipation required by the power supply module.

[0075] The above-mentioned overheat adjustment value means that the power supply module should adjust the heat dissipation or cooling degree based on the current overheat.

[0076] The above-mentioned current change value refers to the current value of the current change in the power supply module, which can be used to feedback the heat release rate of the power supply module. Optionally, the above-mentioned current change value may be positively correlated with the heat release rate of the power supply module, that is, the greater the current change value of the power supply module, the greater its heat release rate.

[0077] The above-mentioned preset range refers to the preset superheat adjustment range corresponding to the power supply module affected by the heat release rate of the power supply module when the opening of the preset control valve is adjusted. That is, when the superheat adjustment value of the power supply module is within the preset range, the opening of the preset control valve is PI-adjusted, which is greatly affected by the heat release rate of the power supply module. For example, when the superheat adjustment value is (5, -5), the deviation between the current superheat value and the target value is small, and the battery heat release rate has a greater impact on the PI adjustment trend. When the superheat adjustment value is (25, 5) or (-5, -10), the superheat deviation is large, and the battery cooling system has not yet entered the steady-state adjustment process. At this time, the change in the battery heat release rate can be ignored.

[0078] The above heat release rate refers to the heat released by the power supply module per unit time.

[0079] The above-mentioned preset conditions refer to the conditions when the heat release rate of the power supply module fluctuates greatly within the preset change cycle, thereby affecting the superheat regulation. For example, the change value of the heat release rate of the power supply module within the change cycle is greater than the preset change threshold.

[0080] Among them, since the change value of the heat release rate of the power supply module cannot be directly obtained, the change trend of the heat release rate of the power supply module can be fed back through the current change value of the power supply module, so as to determine whether the heat release rate of the power supply module meets the preset conditions.

[0081] The above-mentioned adjustment coefficient refers to a coefficient used to adjust the opening of a preset control valve. The adjustment coefficient can be used to more accurately adjust the opening of the preset control valve, thereby achieving more precise heat dissipation of the vehicle's power supply module. The embodiment of the present application does not impose any restrictions on this.

[0082] In some embodiments of the present application, during the operation of the vehicle, in order to prevent the power supply module from being delayed in the target superheat feedback when the expansion valve opening is PI-adjusted according to the target superheat and actual superheat of the battery during the heat dissipation process, the execution subject of the embodiment of the present application can obtain the superheat adjustment value and current change value corresponding to the current superheat adjustment range of the power supply module during the operation of the vehicle.

[0083] Afterwards, it can be determined whether the superheat adjustment value is within the preset range, and whether the heat release rate of the power supply module meets the preset conditions based on the current change value. The heat release rate of the power supply module is obtained based on the feedback of the current change value, that is, whether the heat release rate of the power supply module meets the preset conditions can be determined based on the current change value.

[0084] Optionally, when it is determined that the superheat adjustment value is within a preset range and the heat release rate of the power supply module meets preset conditions based on the current change value, the adjustment coefficient for the preset control valve can be determined according to the current change value.

[0085] As for how to obtain the superheat adjustment value and current change value corresponding to the current superheat adjustment range of the power supply module, and determine whether the heat release rate of the power supply module meets the preset conditions based on the current change value, it can be seen in the following Figure 3 The process shown is explained and will not be described in detail here.

[0086] As for how to determine the adjustment coefficient for the preset control valve according to the current change value, it can be found in the following Figure 4 The process shown is explained and will not be described in detail here.

[0087] Step 203: Based on the superheat adjustment value and the adjustment coefficient, determine the target opening of the preset control valve, and control the preset control valve to open according to the target opening to dissipate heat from the power supply module.

[0088] The above-mentioned preset control valve refers to a preset control valve for controlling the amount of refrigerant for cooling the power supply module, for example Figure 1 The expansion valve 15 of the cooling system 10 is provided.

[0089] The above-mentioned target opening refers to the degree of opening of the preset control valve, such as fully opening the preset control valve, partially opening the preset control valve, or closing the preset control valve.

[0090] In some embodiments of the present application, during the operation of the vehicle, the target opening of the preset control valve is determined based on the superheat adjustment value and the adjustment coefficient, and the preset control valve is controlled to open according to the target opening to dissipate heat from the power supply module. The opening of the preset control valve can be precisely controlled, and while accurately controlling the preset control valve, the overshoot phenomenon of PI adjustment of the preset control valve is reduced, thereby improving the heat dissipation efficiency of the vehicle power supply module.

[0091] As for how to determine the target opening of the preset control valve based on the superheat adjustment value and the adjustment coefficient, it can be seen in the following Figure 4 The process shown is explained and will not be described in detail here.

[0092] The technical solution provided in the embodiment of the present application obtains the superheat adjustment value and the current change value corresponding to the current superheat adjustment range of the power supply module during the operation of the vehicle, and when it is determined that the superheat adjustment value is within the preset range and the heat release rate of the power supply module meets the preset conditions based on the current change value, the adjustment coefficient for the preset control valve is determined according to the current change value, and the target opening of the preset control valve is determined based on the superheat adjustment value and the adjustment coefficient, and the preset control valve is controlled to open according to the target opening to dissipate heat from the power supply module. This technical solution pre-sets an overheat adjustment range for the vehicle's power supply module that is affected by the heat release rate of the power supply module, and feeds back the heat release rate of the power supply module through the trend of current change. When it is determined that the overheat adjustment value corresponding to the current overheat adjustment range of the power supply module satisfies the preset range, and the heat release rate satisfies the preset conditions and may affect the overheat adjustment, the adjustment coefficient for adjusting the opening of the preset control valve is determined by the current change value of the heating module, so as to determine the target opening of the preset control valve based on the adjustment coefficient, thereby introducing the control of the preset control valve into the influencing factors of the battery heat release rate to achieve precise control of the opening of the preset control valve, thereby achieving accurate control of the preset control valve and reducing the overshoot phenomenon of PI adjustment of the preset control valve, thereby improving the heat dissipation efficiency of the vehicle's power supply module.

[0093] See also Figure 3 , which is a flow chart of an embodiment of another method for dissipating heat of a power supply module of a vehicle provided in an embodiment of the present application. Figure 3 The process shown in Figure 2 Based on the process shown, it describes how to obtain the superheat adjustment value and current change value corresponding to the current superheat adjustment range of the power supply module, and determine whether the heat release rate of the power supply module meets the preset conditions based on the current change value. Figure 3 As shown, the process may include the following steps:

[0094] Step 301: Obtain the current superheat and target superheat of the power supply module.

[0095] Step 302: Subtract the current superheat from the target superheat to obtain a superheat adjustment value corresponding to the current superheat adjustment range of the power supply module.

[0096] The following is a unified description of step 301 to step 302:

[0097] The above current overheat refers to the overheat of the power supply module at this time, for example Figure 1 Overheating of the power battery 17 of the cooling system 10.

[0098] The above-mentioned target superheat refers to the superheat of the power supply module to be achieved when the power supply module is cooled. Under this target superheat, the stability and safety of the power supply module are relatively high.

[0099] In some embodiments of the present application, the current superheat and target superheat of the power supply module are obtained, and then the current superheat is subtracted from the target superheat to obtain a superheat adjustment value corresponding to the current superheat adjustment range of the power supply module.

[0100] As an optional implementation, a refrigeration module (eg, Figure 1 The superheat of the outlet of the direct cooling plate 14) shown in the figure is determined and the superheat is determined as the target superheat of the power supply module.

[0101] Step 303: determine the average current value of the current preset cycle of the power supply module, and obtain the previous average current value of the previous preset cycle.

[0102] Step 304: determine the absolute value of the difference between the average current value and the previous average current value as the current change value of the power supply module.

[0103] The following is a unified description of step 303 to step 304:

[0104] The above-mentioned preset period refers to a preset period for collecting the current of the power supply module, which may be 1 hour, 30 minutes, or 10 minutes, etc., and the embodiment of the present application does not impose any limitation on this.

[0105] The above average current value refers to the average value of the current value output by the power supply module within the current preset cycle during the operation of the vehicle.

[0106] The above-mentioned previous average current value refers to the average current value corresponding to the previous preset period adjacent to the current preset period.

[0107] The absolute value of the difference between the above-mentioned average current value and the previous average current value refers to subtracting the average current value in the current preset cycle from the average current value in the previous cycle of the current preset cycle to obtain a subtraction result, and obtaining the absolute value of the subtraction result. For example, the average current value is 5A, and the previous average current value is 20A. The average current value (5A) is subtracted from the previous average current value (20A), and the subtraction result is -15A. The absolute value of the subtraction result is 15A, so the absolute value of the difference is 15A. Conversely, the average current value is 20A, and the previous average current value is 5A. The average current value (20A) is subtracted from the previous average current value (5A), and the subtraction result is 15A. The absolute value of the subtraction result is 15A, so the absolute value of the difference is 15A.

[0108] In some embodiments of the present application, during the operation of the vehicle, the average current value of the current preset cycle of the power supply module and the previous average current value of the previous cycle of the current preset cycle are determined, and the average current value of the current preset cycle is subtracted from the average current value of the previous cycle of the current preset cycle to obtain a subtraction result, and the absolute value of the subtraction result is obtained to obtain the current change value of the power supply module. For example, the average current value of the first cycle is 10A, the average current value of the second cycle is 15A, the second cycle is the next cycle of the first cycle, and the second cycle is the current cycle, then the first cycle is the previous cycle of the current preset cycle, so the average current value of the current preset cycle is 15A, and the previous average current value of the previous preset cycle is 10A. The average current value (15A) in the current preset cycle is subtracted from the average current value (10A) in the previous cycle to obtain a subtraction result (5A), and the absolute value (5A) of the subtraction result (5A) is obtained to obtain the current change value (5A) of the power supply module.

[0109] As an optional implementation method, all current values ​​of the power supply module in the current preset period can be continuously collected by a preset current collection device, and the average value of all the above current values ​​can be calculated to obtain the average current value corresponding to the current preset period.

[0110] Step 305: determine the average speed of the vehicle in the current preset period, and obtain the previous average speed of the vehicle in the previous preset period.

[0111] Step 306: Determine the absolute value of the difference between the average vehicle speed and the previous average vehicle speed as the vehicle's changed speed.

[0112] The following is a unified description of step 305 to step 306:

[0113] The above average vehicle speed refers to the average value of the vehicle speed during the current preset period during the operation of the vehicle. The average vehicle speed and the preset period corresponding to the above average current value are the same period, that is, the above average vehicle speed and average current value are the average vehicle speed and the average current value of the power supply module determined in the current preset period.

[0114] The previous average vehicle speed refers to the average vehicle speed corresponding to the previous preset period adjacent to the current preset period.

[0115] The absolute value of the difference between the above average speed and the previous average speed refers to subtracting the average speed in the current preset cycle from the average speed in the previous cycle of the current preset cycle to obtain the subtraction result and obtain the absolute value of the subtraction result. For example, if the average speed is 5 m / s and the previous average speed is 20 m / s, the average speed (5 m / s) minus the previous average speed (20 m / s) will obtain a subtraction result of -15 m / s, and the absolute value of the subtraction result is 15 m / s, so the absolute value of the difference is 15 m / s. On the contrary, if the average speed is 20 m / s and the previous average speed is 5 m / s, the average speed (20 m / s) minus the previous average speed (5 m / s) will obtain a subtraction result of 15 m / s, and the absolute value of the subtraction result is 15 m / s, so the absolute value of the difference is 15 m / s.

[0116] In an embodiment of the present application, during the operation of the vehicle, the average value of the vehicle running speed in the current preset cycle and the average value of the vehicle running speed in the previous cycle of the current preset cycle are determined, the average value of the vehicle running speed in the current preset cycle is subtracted from the average value of the vehicle running speed in the previous cycle of the current preset cycle to obtain the subtraction result, the absolute value of the subtraction result is obtained, and the changing speed of the vehicle is obtained. For example, the average vehicle running speed in the current cycle (second cycle) is 20 m / s, the average vehicle running speed in the first cycle is 5 m / s, the first cycle is the previous cycle of the second cycle, and the second cycle is the current cycle, so the first cycle is the previous cycle of the current cycle, so the average vehicle running speed in the current preset cycle is 20 m / s, and the current preset cycle is the average vehicle running speed of the previous cycle is 5 m / s. The average vehicle running speed in the current preset cycle (20 m / s) is subtracted from the average vehicle running speed in the previous cycle (5 m / s) of the current preset cycle to obtain the subtraction result (15 m / s), and the absolute value (15 m / s) of the subtraction result (15 m / s) is obtained to obtain the changing speed of the vehicle (15 m / s).

[0117] Step 307: When the vehicle speed change is greater than or equal to a preset vehicle speed change threshold, and the current change value is greater than or equal to a preset current change threshold, determine that the heat release rate of the power supply module meets the preset conditions.

[0118] The above-mentioned preset vehicle speed change threshold refers to the pre-set average vehicle speed value. The preset vehicle speed change threshold can be used to measure whether the vehicle speed changes rapidly, such as sudden acceleration or sudden deceleration, etc. The preset vehicle speed change threshold can be 15km / h or 10km / h, and the embodiment of the present application does not impose any restrictions on this.

[0119] The above-mentioned preset current change threshold refers to a preset current change threshold of the power supply module, and the preset current change threshold can be used to measure whether the heat release rate of the power supply module increases. That is, when the current change value is greater than or equal to the preset current change threshold, it indicates that the heat release rate of the power supply module increases at this time, which affects the opening adjustment of the preset control valve. The above-mentioned preset current change threshold can be 20A, 25A, or other values, and the embodiments of the present application do not limit this.

[0120] In an embodiment of the present application, after obtaining the current change value of the power supply module and the changing speed of the vehicle through steps 304 and 306, it can be determined whether the changing speed is greater than or equal to the preset speed change threshold, and whether the current change value is greater than or equal to the preset current change threshold.

[0121] Optionally, when it is determined that the changed vehicle speed is greater than or equal to the preset vehicle speed change threshold and the current change value is greater than or equal to the preset current change threshold, it means that the vehicle speed has changed rapidly and the heat release rate of the power supply module has increased. At this time, if the opening of the preset control valve is PI-adjusted, it will be affected by the heat release rate and overshoot will occur. Therefore, it can be determined that the heat release rate of the power supply module meets the preset conditions.

[0122] For example, assuming that the preset current change threshold is 10A, the current change value of the power supply module is 15A, the current change value (15A) is greater than the preset current change threshold (10A), the preset vehicle speed change threshold is 10 m / s, the vehicle speed change is 20 m / s, and the change speed (20 m / s) is greater than the preset speed change threshold (10 m / s), then the change speed is greater than or equal to the preset speed change threshold and the current change value is greater than or equal to the preset current change threshold. On the contrary, if the preset current change threshold is 10A, the current change value of the power supply module is 5A, the current change value (5A) is less than the preset current change threshold (10A), the preset vehicle speed change threshold is 10 m / s, the vehicle speed change is 5 m / s, and the change speed (5 m / s) is less than the preset speed change threshold (10 m / s), then the change speed is greater than or equal to the preset speed change threshold and the current change value is greater than or equal to the preset current change threshold is not satisfied, that is, the heat release rate of the power supply module does not meet the preset conditions.

[0123] Among them, according to the heat release formula of lithium-ion batteries, the current change trend can reflect the change in the heat release rate of the battery. The heat release formula of lithium-ion batteries is shown in the following formula (I):

[0124]

[0125] The above Q is the heat released by the battery, the above V is the battery volume, the above I is the instantaneous current of the battery discharge, and R J is the battery internal resistance in Joules, R P is the internal resistance of the battery, U OCV is the open circuit voltage of the battery. According to the above lithium-ion battery heat release formula (I), it can be found that the battery charge and discharge current I is positively correlated with the heat release rate Q, and the battery volume V and battery internal resistance R P and the battery open circuit voltage U OCV These are all fixed parameters of the battery, while the instantaneous current of battery discharge changes with the running state of the vehicle. Therefore, the changing trend of the battery current can directly reflect the changing trend of the battery heat release. Therefore, it can be determined that the current change trend can feedback the change of the battery heat release rate.

[0126] For example, assuming that the preset current change threshold is 10A, the current change value of the power supply module is 15A, the current change value (15A) is greater than the preset current change threshold (10A), the preset vehicle speed change threshold is 10 m / s, the vehicle's changing speed is 20 m / s, and the changing speed (20 m / s) is greater than the preset speed change threshold (10 m / s), then the changing speed is greater than or equal to the preset speed change threshold and the current change value is greater than or equal to the preset current change threshold, indicating that the vehicle speed has changed rapidly at this time, and the heat release rate of the power supply module has increased. At this time, if the opening of the preset control valve is adjusted by PI, it will be affected by the heat release rate and overshoot will occur. Therefore, it can be determined that the heat release rate of the power supply module meets the preset conditions.

[0127] On the contrary, the preset current change threshold is 10A, the current change value of the power supply module is 5A, the current change value (5A) is less than the preset current change threshold (10A), the preset vehicle speed change threshold is 10 m / s, the vehicle's changing speed is 5 m / s, and the changing speed (5 m / s) is less than the preset speed change threshold (10 m / s), then the situation that the changing speed is greater than or equal to the preset speed change threshold and the current change value is greater than or equal to the preset current change threshold is not satisfied, that is, the heat release rate of the power supply module does not meet the preset conditions.

[0128] The technical solution provided in the embodiment of the present application obtains the current overheat and target overheat of the power supply module, subtracts the current overheat from the target overheat, obtains the overheat adjustment value corresponding to the current overheat adjustment range of the power supply module, determines the average current value of the preset cycle to which the power supply module currently belongs, obtains the previous average current value of the previous preset cycle, and determines the absolute value of the difference between the average current value and the previous average current value as the current change value of the power supply module, determines the average speed of the vehicle in the preset cycle to which the vehicle currently belongs, and obtains the previous average speed of the vehicle in the previous preset cycle, and determines the absolute value of the difference between the average speed and the previous average speed as the changing speed of the vehicle, and when the changing speed is greater than or equal to the preset speed change threshold, and the current change value is greater than or equal to the preset current change threshold, determines that the heat release rate of the power supply module meets the preset conditions. This technical solution determines whether overshoot occurs when adjusting the preset control valve opening through the overheat adjustment value of the power supply module, the current change value, and the vehicle speed change. It can accurately determine whether the heat release rate of the power supply module meets the preset conditions when the superheat adjustment value is within the preset range.

[0129] See also Figure 4 , which is a flow chart of an embodiment of another method for heat dissipation of a power supply module of a vehicle provided in an embodiment of the present application. Figure 4 The process shown in Figure 2 Based on the process shown in FIG. 1 , it is described how to determine the adjustment coefficient for the preset control valve according to the current change value, and how to determine the target opening of the preset control valve based on the superheat adjustment value and the adjustment coefficient. Figure 4 As shown, the process may include the following steps:

[0130] Step 401, according to the current change value, determine the target correspondence relationship including the current change value from the correspondence relationship between multiple current change values ​​and adjustment coefficients of the preset power supply module; wherein, when the current change value is less than the preset value, the adjustment coefficient is directly proportional to the current change value, and when the current change value is greater than the preset value, the adjustment coefficient is inversely proportional to the current change value.

[0131] Step 402: Determine the adjustment coefficient included in the target corresponding relationship as the adjustment coefficient for the preset control valve.

[0132] The following is a unified description of step 401 to step 402:

[0133] The above-mentioned correspondence between the current change value and the adjustment coefficient refers to the correspondence between the preset current change value and the adjustment coefficient, which can be expressed in the form of a table or a dot graph, and the embodiment of the present application does not limit this. Among them, the above-mentioned correspondence indicates that when the current change value decreases, the corresponding PI adjustment target opening of the expansion valve needs to be corrected and reduced to adapt to the current change trend.

[0134] The above adjustment coefficient refers to a coefficient used to adjust the opening of the preset control valve. The adjustment coefficient can more accurately adjust the opening of the preset control valve, thereby achieving more accurate heat dissipation of the vehicle's power supply module. The embodiment of the present application does not limit this. For example, Figure 1 , the opening of the expansion valve 16 is accurately regulated by adjusting the coefficient. The embodiment of the present application does not limit this.

[0135] The above target corresponding relationship refers to the corresponding relationship between the above determined current change value and the adjustment coefficient.

[0136] In some embodiments of the present application, Figure 3 From the process shown, it can be seen that the current change value of the power supply module can feed back the change in the heat release rate of the power supply module, and the change in the heat release rate of the power supply module causes overshoot in the PI adjustment of the preset control valve opening. Therefore, in order to avoid the overshoot of the preset control valve opening caused by the change in the heat release rate of the power supply module, the correspondence between different current change values ​​and the adjustment coefficient can be pre-set, so as to determine the adjustment coefficient for adjusting the preset control valve opening according to the current change value, and then adjust the preset control valve opening based on the adjustment coefficient.

[0137] As an optional implementation, the target correspondence relationship including the current change value can be determined from the correspondence relationship between multiple current change values ​​and adjustment coefficients of the preset power supply module according to the above current change value. Wherein, when the current change value is less than the preset value, the adjustment coefficient is directly proportional to the current change value, and when the current change value is greater than the preset value, the adjustment coefficient is inversely proportional to the current change value. The adjustment coefficient table indicates that when the current heat release rate decreases (that is, the absolute value of the current change value decreases), the corresponding PI adjustment to obtain the expansion valve target opening needs to be corrected and reduced.

[0138] As an exemplary implementation, the current change value can be used as a keyword to search for a preset adjustment coefficient table to obtain a target correspondence relationship including the current change value, and the adjustment coefficient included in the target correspondence relationship is determined as the adjustment coefficient for the preset control valve. The above adjustment coefficient table contains the correspondence between the current change value of the power supply module and the adjustment coefficient. The above adjustment coefficient table can be shown in Table 1 below:

[0139] Table 1

[0140] Current difference α -125 -95 -45 -20 0 20 45 95 125 Adjustment coefficient E 0.8 0.65 0.45 0.3 0 1.15 1.35 1.65 1.75

[0141] For example, assuming that the current change value is 20, the preset adjustment coefficient table is searched with the current change value (20) as the keyword to obtain the target correspondence relationship including the current change value (i.e., the current change value 20 corresponds to the adjustment coefficient 1.15), and the adjustment coefficient 1.15 in the target correspondence relationship is used as the adjustment coefficient for the preset control valve. When the preset value is 30, the current change value (20) is less than the preset value (30), and the adjustment coefficient is directly proportional to the current change value. When the preset value is 10, the current change value (20) is greater than the preset value (10), and the adjustment coefficient is inversely proportional to the current change value.

[0142] As an exemplary implementation, when searching a preset adjustment coefficient table with the current change value as a keyword, optionally, if the keyword is found in the adjustment coefficient table, the corresponding relationship including the keyword is determined as the target corresponding relationship.

[0143] Optionally, if the keyword is not found in the adjustment coefficient table, the current change interval to which the keyword (current change value) belongs in the above adjustment coefficient table can be determined, and the two corresponding relationships corresponding to the maximum value and minimum value contained in the current change interval can be determined as the target corresponding relationships.

[0144] Afterwards, a first difference between the maximum value and the current change value, and a second difference between the current change difference and the minimum value can be determined, and a ratio of the first difference to the second difference can be determined. Based on the determined ratio, a maximum adjustment coefficient corresponding to the maximum value and a minimum adjustment coefficient corresponding to the minimum value can be determined from the above target correspondence. Afterwards, the adjustment coefficient for the preset control valve can be determined based on the above ratio, the above maximum adjustment coefficient, and the minimum adjustment coefficient.

[0145] As an exemplary implementation, the adjustment coefficient of the preset control valve can be determined by the following formula (II):

[0146]

[0147] Among them, a max is the maximum adjustment coefficient, a min is the minimum adjustment coefficient, x is the adjustment coefficient of the preset control valve, and b is the above ratio.

[0148] For example, if the current change value is 25, the corresponding maximum value is 45 and the minimum value is 20. Therefore, the first difference is 20 and the second difference is 5. According to Table 1, the maximum adjustment coefficient corresponding to the maximum value is 1.35, and the minimum adjustment coefficient corresponding to the minimum value is 1.15.max (1.35), minimum adjustment coefficient a min (1.15), the maximum value I corresponding to the current change value max (45), the minimum value I corresponding to the current change value min (20) is substituted into the above formula (II), and the adjustment coefficient x (1.19) of the preset control valve can be calculated.

[0149] When the superheat adjustment value is within the preset range, and the heat release rate of the power supply module determined based on the current change value meets the preset conditions, steps 403 to 406 are executed.

[0150] Step 403: According to the superheat adjustment value, determine a first proportional factor and a first integral factor from the corresponding relationship between the preset multiple heat adjustment values ​​and the adjustment coefficient, wherein the adjustment coefficient includes a proportional factor and an integral factor.

[0151] Step 404: Obtain the vehicle type of the vehicle, and determine the initial opening of the preset control valve according to the vehicle type.

[0152] Step 405: Calculate the superheat adjustment value, the first proportional factor, the first integral factor, and the initial opening according to a preset adjustment function to obtain a first opening of the preset control valve.

[0153] The following is a unified description of steps 403 to 405:

[0154] The first proportional factor refers to a parameter that is adjusted according to the current deviation during PI regulation, and determines the response speed to the deviation.

[0155] The first integral factor mentioned above refers to the long-term adjustment by accumulating previous deviations during PI adjustment to ensure that a stable state can be achieved in the end.

[0156] The above-mentioned initial opening refers to the initial opening value of the preset control valve before being adjusted when cooling and dissipating heat for the power supply module, which may be a value pre-set according to the vehicle type of the vehicle.

[0157] The above-mentioned regulation function refers to a pre-set function for performing PI regulation on the opening of a preset control valve.

[0158] The first opening degree refers to the opening degree of the preset control valve determined by the adjustment function, and the opening degree has not been further adjusted by the adjustment coefficient.

[0159] In some embodiments of the present application, in order to determine the target opening of a preset control valve under current working conditions, the opening value before the adjustment coefficient is adjusted can be first determined through a preset adjustment function.

[0160] As an optional implementation, the first proportional factor and the first integral factor may be determined from the corresponding relationship between the preset superheat adjustment value and the adjustment parameter according to the above superheat adjustment value. The above adjustment parameter may be used for the proportional factor and the integral factor for adjustment.

[0161] As an exemplary implementation, the first proportional factor and the first integral factor may be determined from a preset adjustment parameter table according to the superheat adjustment value. The adjustment parameter table may include a corresponding relationship between the superheat adjustment value and the adjustment parameter, which may be shown in Table 2 below:

[0162] Table 2

[0163] Superheat adjustment value: 25 22 18 15 12 …… 5 First scale factor 10 8 12 9 6 …… 9 First integrating factor 3.5 2.8 2.2 2.5 1.5 …… 3.5

[0164] For example, the superheat adjustment value is 15. According to the superheat adjustment value (15), it can be determined from Table 2 that the second proportional factor is 19 and the second integral factor is 2.5.

[0165] Afterwards, the vehicle type of the vehicle can be obtained, and the initial opening of the preset control valve can be determined according to the vehicle type. The above vehicle type may refer to the drive type of the vehicle, such as pure electric drive or extended range drive (electric drive + fuel drive), etc. For another example, when the vehicle type is extended range drive, the initial opening of the preset control valve is 10, and when the vehicle type is pure electric drive, the initial opening of the preset control valve is 20.

[0166] Finally, the superheat adjustment value, the first proportional factor, the first integral factor, and the initial opening can be calculated according to the preset adjustment function to obtain the first opening of the preset control valve.

[0167] As an exemplary implementation, the first opening of the preset control valve may be determined by a regulation function shown in the following formula (III):

[0168]

[0169] Where diff is the superheat adjustment value, p is the first proportional factor, I is the first integral factor, p v is the initial opening, p req It is the first opening of the preset control valve.

[0170] Step 406: adjust the first opening according to the adjustment coefficient to obtain a target opening of the preset control valve.

[0171] The above-mentioned target opening refers to the final opening after adjusting the preset control valve opening, that is, the opening of the preset control valve can be adjusted according to the target opening, and the embodiment of the present application does not limit this.

[0172] In some embodiments of the present application, after the first opening and the adjustment coefficient are determined, the first opening can be adjusted according to the adjustment coefficient to obtain a target opening of the preset control valve.

[0173] As an optional implementation method, the first opening can be multiplied by the adjustment coefficient to obtain the target opening of the preset control valve. For example, the adjustment coefficient is 0.1, the first opening is 0.5, and the first opening (0.5) is multiplied by the adjustment coefficient (0.1) to obtain the target opening of the preset control valve (0.05).

[0174] Steps 403 to 406 describe that when the superheat adjustment value is within a preset range and the heat release rate of the power supply module determined based on the current change value meets the preset conditions, the first proportional factor and the first integral factor are determined from a preset adjustment parameter table according to the superheat adjustment value, the vehicle type of the vehicle is obtained, and the initial opening of the preset control valve is determined according to the vehicle type. According to the preset adjustment function, the superheat adjustment value, the first proportional factor, the first integral factor, and the initial opening are calculated to obtain the first opening of the preset control valve, and the first opening is adjusted according to the adjustment coefficient to obtain the target opening of the preset control valve, so that the preset control valve is controlled to open according to the target opening to achieve heat dissipation of the power supply module.

[0175] When the superheat adjustment range is not within the preset range, and / or it is determined that the heat release rate of the power supply module does not meet the preset conditions, Figure 5 Adjust the process shown in the figure, see Figure 5 , is a flow chart of another embodiment of a method for cooling the power supply module of a vehicle provided in an embodiment of the present application. Figure 5 As shown, the process may include the following steps:

[0176] Step 501: According to the superheat adjustment value, determine a second proportional factor and a second integral factor from a correspondence between a preset superheat adjustment value and an adjustment parameter, wherein the adjustment parameter may include a proportional factor and an integral factor.

[0177] Step 502: Obtain the vehicle type of the vehicle, and determine the initial opening of the preset control valve according to the vehicle type.

[0178] Step 503: Calculate the superheat adjustment value, the second proportional factor, the second integral factor, and the initial opening according to a preset adjustment function to obtain a second opening of the preset control valve.

[0179] The following is a unified description of steps 501 to 503:

[0180] The above-mentioned preset correspondence between the superheat adjustment value and the adjustment parameter refers to a preset correspondence between the superheat adjustment value and the adjustment parameter, and the above-mentioned adjustment parameter may include a proportional factor and an integral factor. Therefore, the above-mentioned correspondence may include a correspondence between the superheat adjustment value, the proportional factor, and the integral factor. The above-mentioned correspondence may be represented in the form of a table or in the form of a dot graph, and the embodiment of the present application does not limit this.

[0181] The second proportional factor refers to a parameter that is adjusted according to the current deviation during PI regulation, and determines the response speed to the deviation.

[0182] The second integral factor mentioned above refers to the long-term adjustment by accumulating previous deviations during PI adjustment to ensure that a stable state can be achieved in the end.

[0183] The above-mentioned initial opening refers to the initial opening value of the preset control valve before being adjusted when cooling and dissipating heat for the power supply module, which may be a value pre-set according to the vehicle type of the vehicle.

[0184] The above-mentioned regulation function refers to a pre-set function for performing PI regulation on the opening of a preset control valve.

[0185] The second opening degree mentioned above refers to the opening degree of the preset control valve determined by the adjustment function, and the opening degree is used to control the opening degree of the preset control valve.

[0186] In some embodiments of the present application, the second opening of the preset control valve under the current working condition can be determined by a preset adjustment function.

[0187] As an optional implementation, the second proportional factor and the second integral factor may be determined from the corresponding relationship between the preset superheat adjustment value and the adjustment parameter according to the superheat adjustment value. The adjustment parameter may be used for the proportional factor and the integral factor for adjustment.

[0188] As an exemplary implementation, the second proportional factor and the second integral factor may be determined from a preset adjustment parameter table according to the superheat adjustment value. The adjustment parameter table may include a corresponding relationship between the superheat adjustment value and the adjustment parameter, which may be shown in Table 3 below:

[0189] Table 3

[0190] Superheat adjustment value: 25 22 18 15 12 …… 5 Second scale factor 10 8 12 9 6 …… 9 Second integrating factor 3.5 2.8 2.2 2.5 1.5 …… 3.5

[0191] For example, the superheat adjustment value is 18. According to the superheat adjustment value (18) from Table 3, it can be determined that the second proportional factor is 12 and the second integral factor is 2.2.

[0192] Afterwards, the vehicle type of the vehicle can be obtained, and the initial opening of the preset control valve can be determined according to the vehicle type. The above vehicle type may refer to the drive type of the vehicle, such as pure electric drive or extended range drive (electric drive + fuel drive), etc. For another example, when the vehicle type is extended range drive, the initial opening of the preset control valve is 10, and when the vehicle type is pure electric drive, the initial opening of the preset control valve is 20.

[0193] Finally, the superheat adjustment value, the second proportional factor, the second integral factor, and the initial opening can be calculated according to the preset adjustment function to obtain the second opening of the preset control valve.

[0194] As an exemplary implementation, the second opening of the preset control valve may be determined by a regulation function shown in the following formula (IV):

[0195]

[0196] Where diff is the superheat adjustment value, p is the second proportional factor, I is the second integral factor, p v is the initial opening, p req It is the second opening of the preset control valve.

[0197] Step 504 , controlling the preset control valve to open according to the second opening degree to dissipate heat from the power supply module.

[0198] In some embodiments of the present application, a preset control valve is opened according to a second opening control to dissipate heat from the power supply module.

[0199] Steps 501 to 504 describe that when the superheat adjustment range is not within the preset range, and / or the heat release rate of the power supply module determined based on the current change value does not meet the preset conditions, the second proportional factor and the second integral factor are determined from the preset adjustment parameter table according to the superheat adjustment value, the vehicle type of the vehicle is obtained, and the initial opening of the preset control valve is determined according to the vehicle type. According to the preset adjustment function, the superheat adjustment value, the second proportional factor, the second integral factor, and the initial opening are calculated to obtain the second opening of the preset control valve, so as to control the preset control valve to open according to the second opening to achieve heat dissipation of the power supply module.

[0200] The technical solution provided by the embodiment of the present application obtains a target corresponding relationship including the current change value by searching a preset adjustment coefficient table with the current change value as a keyword, wherein the adjustment coefficient table contains the corresponding relationship between the current change value of the power supply module and the adjustment coefficient; wherein, when the current change value is less than the preset value, the adjustment coefficient is in direct proportion to the current change value, and when the current change value is greater than the preset value, the adjustment coefficient is in inverse proportion to the current change value, and the adjustment coefficient included in the target corresponding relationship is determined as the adjustment coefficient for the preset control valve, and according to the superheat adjustment value, a first proportional factor and a first integral factor are determined from the corresponding relationship between the preset multi-heat adjustment value and the adjustment coefficient, wherein the above-mentioned adjustment coefficient includes the proportional factor and the integral factor, the vehicle type of the vehicle is obtained, and the initial opening of the preset control valve is determined according to the vehicle type, and according to the preset adjustment function, the superheat adjustment value, the first proportional factor, the first integral factor, and the initial opening are calculated to obtain the first opening of the preset control valve, and the first opening is adjusted according to the adjustment coefficient to obtain the target opening of the preset control valve. This technical solution pre-sets the corresponding relationship between the current change value and the adjustment coefficient, and the current change value can feedback the heat release rate of the vehicle power supply module. Therefore, the adjustment coefficient determined according to the electric charge change value can more accurately adjust the opening of the preset control valve. Based on this, after the first opening of the preset control valve is determined through PI adjustment, the first opening is further adjusted through the adjustment coefficient, which can more accurately determine the target opening of the preset control valve, thereby achieving more accurate determination of the target opening of the preset control valve.

[0201] See also Figure 6 , is a block diagram of an embodiment of a vehicle power supply module heat dissipation device provided in an embodiment of the present application, as an embodiment, Figure 6 The device shown can be applied to a battery cooling system of a vehicle, wherein the battery cooling system controls the flow rate of the refrigerant for dissipating heat to the power supply module in the vehicle by controlling the opening of a preset control valve, such as Figure 6 Said device may include:

[0202] The acquisition module 61 is used to acquire the overheat adjustment value and the current change value corresponding to the current overheat adjustment range of the power supply module during the operation of the vehicle;

[0203] A determination module 62, configured to determine a regulation coefficient for a preset control valve according to the current change value when it is determined that the superheat adjustment value is within a preset range and the heat release rate of the power supply module meets a preset condition based on the current change value;

[0204] The heat dissipation module 63 is used to determine the target opening of the preset control valve based on the superheat adjustment value and the adjustment coefficient, and control the preset control valve to open according to the target opening to dissipate heat for the power supply module.

[0205] like Figure 7 As shown, it is a structural schematic diagram of a vehicle provided in an embodiment of the present application, including a power supply module 71 and a battery cooling system 72, wherein the battery cooling system 72 may include a processor 721, a communication interface 722, a memory 723 and a communication bus 724, wherein the processor 721, the communication interface 722, and the memory 723 communicate with each other through the communication bus 724,

[0206] A battery cooling system 72, used to dissipate heat for the power supply module 71;

[0207] Memory 723, used for storing computer programs;

[0208] In one embodiment of the present application, the processor 721 is used to execute the program stored in the memory 723 to implement the power supply module heat dissipation method for a vehicle provided by any of the above method embodiments, including:

[0209] During the operation of the vehicle, an overheat adjustment value and a current change value corresponding to a current overheat adjustment range of the power supply module are obtained;

[0210] When it is determined that the superheat adjustment value is within a preset range and the heat release rate of the power supply module meets a preset condition based on the current change value, determining the adjustment coefficient for the preset control valve according to the current change value;

[0211] Based on the superheat adjustment value and the adjustment coefficient, the target opening of the preset control valve is determined, and the preset control valve is controlled to open according to the target opening to dissipate heat from the power supply module.

[0212] An embodiment of the present application also provides a storage medium having a computer program stored thereon. When the computer program is executed by a processor, the steps of the vehicle power supply module heat dissipation method provided in any of the aforementioned method embodiments are implemented.

[0213] The device embodiments described above are merely illustrative, wherein the units described as separate components may or may not be physically separated, and the components shown as units may or may not be physical units, that is, they may be located in one place or distributed on multiple network units. Some or all of the modules may be selected according to actual needs to achieve the purpose of the present embodiment.

[0214] Through the text of the above implementation methods, those skilled in the art can clearly understand that each implementation method can be implemented by means of software plus a general hardware platform, and of course, by hardware. Based on this understanding, the above technical solution is essentially or the part that contributes to the relevant technology can be embodied in the form of a software product, and the computer software product can be stored in a computer-readable storage medium, such as ROM / RAM, a disk, an optical disk, etc., including a number of instructions for a computer device (which can be a personal computer, a server, or a network device, etc.) to execute the methods described in each embodiment or some parts of the embodiment.

[0215] It should be understood that the terms used in the text are only for the purpose of the specific example implementation of the text, and are not intended to be limited. Unless the context clearly indicates otherwise, the singular forms "one", "an" and "said" as used in the text can also be represented to include plural forms. The terms "include", "comprise", "contain", and "have" are inclusive, and therefore specify the existence of the stated features, steps, operations, elements and / or parts, but do not exclude the existence or addition of one or more other features, steps, operations, elements, parts, and / or their combinations. The method steps, processes, and operations of the text in the text are not interpreted as necessarily requiring them to be performed in the specific order of the text or description, unless the execution order is clearly indicated. It should also be understood that additional or alternative steps can be used.

[0216] The above description is only a specific implementation of the present application, so that those skilled in the art can understand or implement the present application. Various modifications to these embodiments will be apparent to those skilled in the art, and the general principles defined herein can be implemented in other embodiments without departing from the spirit or scope of the present application. Therefore, the present application will not be limited to the embodiments shown herein, but will conform to the widest range consistent with the principles and novel features applied for herein.

Claims

1. A method for heat dissipation of a power supply module of a vehicle, characterized in that: A battery cooling system applied to a vehicle, wherein the battery cooling system controls the flow of a refrigerant for dissipating heat to a power supply module in the vehicle by controlling the opening of a preset control valve, and the method comprises: During the operation of the vehicle, an overheat adjustment value and a current change value corresponding to a current overheat adjustment range of the power supply module are obtained; When it is determined that the superheat adjustment value is within a preset range and the heat release rate of the power supply module meets a preset condition based on the current change value, determining the adjustment coefficient for the preset control valve according to the current change value; Based on the superheat adjustment value and the adjustment coefficient, the target opening of the preset control valve is determined, and the preset control valve is controlled to open according to the target opening to dissipate heat from the power supply module.

2. The method according to claim 1, characterized in that The obtaining of the overheat adjustment value and the current change value corresponding to the current overheat adjustment range of the power supply module includes: Obtaining a current overheat and a target overheat of the power supply module; Subtract the current superheat from the target superheat to obtain a superheat adjustment value corresponding to the current superheat adjustment range of the power supply module; Determine the average current value of the preset cycle to which the power supply module currently belongs, and obtain the previous average current value of the previous preset cycle; The absolute value of the difference between the average current value and the previous average current value is determined as the current change value of the power supply module.

3. The method according to claim 1, characterized in that The determining, based on the current change value, that the heat release rate of the power supply module meets a preset condition includes: Determine the average speed of the vehicle in the current preset period, and obtain the previous average speed of the vehicle in the previous preset period; Determine the absolute value of the difference between the average vehicle speed and the previous average vehicle speed as the changed vehicle speed of the vehicle; When the changed vehicle speed is greater than or equal to a preset vehicle speed change threshold, and the current change value is greater than or equal to a preset current change threshold, it is determined that the heat release rate of the power supply module meets the preset conditions.

4. The method according to claim 1, characterized in that: Determining the adjustment coefficient for the preset control valve according to the current change value includes: According to the current change value, a target corresponding relationship including the current change value is determined from the preset corresponding relationships between multiple current change values ​​and adjustment coefficients of the power supply module; wherein, when the current change value is less than the preset value, the adjustment coefficient is in direct proportion to the current change value, and when the current change value is greater than the preset value, the adjustment coefficient is in inverse proportion to the current change value; The adjustment coefficient included in the target corresponding relationship is determined as the adjustment coefficient for the preset control valve.

5. The method according to claim 1, characterized in that The step of determining the target opening of the preset control valve based on the superheat adjustment value and the adjustment coefficient includes: According to the superheat adjustment value, a first proportional factor and a first integral factor are determined from a correspondence between a preset superheat adjustment value and an adjustment parameter; wherein the adjustment parameter includes a proportional factor and an integral factor; Acquiring the vehicle type of the vehicle, and determining the initial opening of the preset control valve according to the vehicle type; According to a preset adjustment function, the superheat adjustment value, the first proportional factor, the first integral factor, and the initial opening are calculated to obtain a first opening of the preset control valve; The first opening is adjusted according to the adjustment coefficient to obtain a target opening of the preset control valve.

6. The method according to claim 5, characterized in that The step of adjusting the first opening according to the adjustment coefficient to obtain a target opening of the preset control valve includes: The first opening is multiplied by the adjustment coefficient to obtain a target opening of the preset control valve.

7. The method according to claim 1, characterized in that The method further comprises: When it is determined that the superheat adjustment value is not within a preset range and / or when it is determined that the heat release rate of the power supply module does not meet a preset condition, a second proportional factor and a second integral factor are determined from a corresponding relationship between a preset superheat adjustment value and an adjustment parameter according to the superheat adjustment value; wherein the adjustment parameter includes a proportional factor and an integral factor; Acquiring the vehicle type of the vehicle, and determining the initial opening of the preset control valve according to the vehicle type; According to a preset adjustment function, the superheat adjustment value, the second proportional factor, the second integral factor, and the initial opening are calculated to obtain a second opening of the preset control valve; The preset control valve is controlled to open according to the second opening degree to dissipate heat from the power supply module.

8. A heat dissipation device for a power supply module of a vehicle, characterized in that: A battery cooling system for a vehicle, wherein the battery cooling system controls the flow of a refrigerant for dissipating heat to a power supply module in the vehicle by controlling the opening of a preset control valve, and the device comprises: An acquisition module, used for acquiring an overheat adjustment value and a current change value corresponding to a current overheat adjustment range of the power supply module during operation of the vehicle; A determination module, configured to determine, when it is determined that the superheat adjustment value is within a preset range and, based on the current change value, determine that the heat release rate of the power supply module meets a preset condition, a regulation coefficient for the preset control valve according to the current change value; The heat dissipation module is used to determine the target opening of the preset control valve based on the superheat adjustment value and the adjustment coefficient, and control the preset control valve to open according to the target opening to dissipate heat for the power supply module.

9. A vehicle, characterized in that: include: Power module and battery cooling system; The battery cooling system dissipates heat for the power supply module; The battery cooling system includes a processor and a memory, and the processor is used to execute a vehicle charging program stored in the memory to implement the vehicle power supply module heat dissipation method according to any one of claims 1 to 7.

10. A storage medium, characterized in that: The storage medium stores one or more programs, and the one or more programs can be executed by one or more processors to implement the power supply module heat dissipation method for a vehicle according to any one of claims 1 to 7.

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