Power supply module heat dissipation method and device of vehicle, vehicle and storage medium

Abstract

The application relates to a power supply module heat dissipation method and device of a vehicle, the vehicle and a storage medium. The method comprises the following steps: obtaining an overheat degree adjustment value corresponding to an overheat degree adjustment range of a power supply module and a current change value in the process of running the vehicle; when it is determined that the overheat degree adjustment value is in a preset range and the heat dissipation rate of the power supply module meets a preset condition based on the current change value, determining an adjustment coefficient of a preset control valve according to the current change value; determining a target opening degree of the preset control valve based on the overheat degree adjustment value and the adjustment coefficient; and controlling the preset control valve to open according to the target opening degree to dissipate heat of the power supply module. Therefore, the preset control valve can be accurately controlled, the overshoot phenomenon of PI adjustment of the preset control valve is reduced, and the heat dissipation efficiency of the power supply module of the vehicle is improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of vehicles, and particularly relates to a power supply module heat dissipation method and device of a vehicle, the vehicle and a storage medium. BACKGROUND

[0002] At present, in the process of vehicle operation, the thermal management of the battery cooling system on the vehicle battery plays an important role in the safety of vehicle operation. For the thermal management of the vehicle battery, there is a straight cooling mode of a refrigerant plate to dissipate the heat generated by the battery during vehicle operation. In the straight cooling mode of the refrigerant plate, the refrigerant plate can be connected to an expansion valve, and the flow of the cold coal in the refrigerant plate is controlled by controlling the opening degree of the expansion valve, so as to control the outlet superheat degree of the refrigerant plate.

[0003] In the related art, when the expansion valve is controlled, the difference between the target superheat degree and the current superheat degree of the battery is used for PI adjustment of the opening degree of the expansion valve. However, in actual application, when the vehicle appears sudden acceleration or sudden deceleration and the like, the stability of the system fluctuates, and the heat release rate of the battery also fluctuates sharply in the change period, which causes the target superheat degree of the battery to fluctuate. Therefore, when the opening degree of the expansion valve is adjusted according to the target superheat degree and the actual superheat degree of the battery, due to the time delay of the target superheat degree feedback, the PI adjustment appears overshoot, which affects the stability of the battery cooling system of the vehicle, thereby reducing the performance and stability of the battery and affecting the performance of the whole vehicle. SUMMARY

[0004] The present application provides a power supply module heat dissipation method and device of a vehicle, a vehicle and a storage medium to solve the technical problem that in the prior art, when the opening degree of the expansion valve is adjusted according to the target superheat degree and the actual superheat degree of the battery, due to the time delay of the target superheat degree feedback, the PI adjustment appears overshoot, which affects the stability of the battery cooling system of the vehicle, thereby reducing the performance and stability of the battery and affecting the performance of the whole vehicle.

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

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

[0007] In a case where the superheat degree adjustment value is determined to be in a preset range and the heat release rate of the power supply module is determined to meet a preset condition based on the current change value, a regulation coefficient for the preset control valve is determined according to the current change value;

[0008] Determine a target opening degree of the preset control valve based on the overheating adjustment value and the adjustment coefficient, and control the preset control valve to open according to the target opening degree, so as to dissipate heat of the power supply module.

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

[0010] Obtain a current overheating degree and a target overheating degree of the power supply module.

[0011] Obtain a current overheating adjustment value corresponding to the current overheating adjustment range of the power supply module by subtracting the current overheating degree from the target overheating degree.

[0012] Determine an average current value of a current preset period to which the power supply module belongs, and obtain a previous average current value of a previous preset period.

[0013] Determine an absolute value of a difference between the average current value and the previous average current value as a current change value of the power supply module.

[0014] As an optional implementation, the determining of the heat dissipation rate of the power supply module satisfying a preset condition based on the current change value comprises:

[0015] Determine an average vehicle speed of a current preset period to which the vehicle belongs, and obtain a previous average vehicle speed of a previous preset period.

[0016] Determine an absolute value of a difference between the average vehicle speed and the previous average vehicle speed as a change vehicle speed of the vehicle.

[0017] In a case where the change vehicle speed is greater than or equal to a preset vehicle speed change threshold value and the current change value is greater than or equal to a preset current change threshold value, determine that the heat dissipation rate of the power supply module satisfies a preset condition.

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

[0019] According to the current change value, determine a target corresponding relationship containing the current change value from a preset corresponding relationship between a plurality of current change values and adjustment coefficients of the power supply module; wherein, in a case where the current change value is less than a preset value, the adjustment coefficient is in a positive proportional relationship with the current change value, and in a case where the current change value is greater than the preset value, the adjustment coefficient is in an inverse proportional relationship with the current change value.

[0020] Determine the adjustment coefficient contained in the target corresponding relationship as the adjustment coefficient for the preset control valve.

[0021] As an optional implementation manner, the determining the target opening degree of the preset control valve based on the overheating adjustment value and the adjustment coefficient comprises:

[0022] determining a first proportional factor and a first integral factor from a preset correspondence between the overheating adjustment value and adjustment parameters according to the overheating adjustment value, wherein the adjustment parameters comprise a proportional factor and an integral factor;

[0023] obtaining a vehicle type of the vehicle, and determining an initial opening degree of the preset control valve according to the vehicle type;

[0024] calculating the overheating adjustment value, the first proportional factor, the first integral factor, and the initial opening degree according to a preset adjustment function, to obtain a first opening degree of the preset control valve;

[0025] adjusting the first opening degree according to the adjustment coefficient to obtain a target opening degree of the preset control valve.

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

[0027] multiplying the first opening degree by the adjustment coefficient to obtain the target opening degree of the preset control valve.

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

[0029] determining a second proportional factor and a second integral factor from a preset correspondence between the overheating adjustment value and adjustment parameters according to the overheating adjustment value in a case that the overheating adjustment value is determined not to be in a preset range, and / or a case that the heat dissipation rate of the power supply module is determined not to satisfy a preset condition, wherein the adjustment parameters comprise a proportional factor and an integral factor;

[0030] obtaining a vehicle type of the vehicle, and determining an initial opening degree of the preset control valve according to the vehicle type;

[0031] calculating the overheating adjustment value, the second proportional factor, the second integral factor, and the initial opening degree according to a preset adjustment function, to obtain a second opening degree of the preset control valve;

[0032] controlling the preset control valve to open according to the second opening degree, to dissipate heat of the power supply module.

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

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

[0035] a determination module configured to, when the overheat adjustment value is within a preset range and the heat dissipation rate of the power supply module meets a preset condition based on the current change value, determine an adjustment coefficient for the preset control valve according to the current change value;

[0036] a heat dissipation module configured to determine a target opening degree of the preset control valve based on the overheat adjustment value and the adjustment coefficient, and control the preset control valve to open at the target opening degree to dissipate heat from 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 from the power supply module;

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

[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 power supply module heat dissipation method of any one of the first aspect.

[0041] The technical scheme provided in the embodiments of the present application comprises the following steps: obtaining the overheat adjustment value corresponding to the current overheat adjustment range of the power supply module and the current change value during the running of the vehicle; determining the adjustment coefficient of the preset control valve according to the current change value when the overheat adjustment value is within the preset range and the heat dissipation rate of the power supply module meets the preset condition based on the current change value; determining the target opening degree of the preset control valve based on the overheat adjustment value and the adjustment coefficient; and controlling the preset control valve to open according to the target opening degree to dissipate heat for the power supply module. The technical scheme sets the overheat adjustment range of the power supply module of the vehicle in advance, which is affected by the heat dissipation rate of the power supply module, and feeds back the heat dissipation 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 meets the preset range and the heat dissipation rate meets the preset condition that may affect the overheat adjustment, the adjustment coefficient for adjusting the opening degree of the control valve is determined through the current change value of the power supply module. The target opening degree of the preset control valve is determined based on the adjustment coefficient, so that the control of the preset control valve is introduced into the influencing factor of the battery heat dissipation rate, the opening degree of the preset control valve is accurately controlled, the preset control valve is accurately controlled, the overshoot phenomenon of PI adjustment of the preset control valve is reduced, and the heat dissipation efficiency of the power supply module of the vehicle is improved. BRIEF DESCRIPTION OF DRAWINGS

[0042] The accompanying drawings, which are incorporated into and form part of the specification, illustrate embodiments consistent with the present application and, together with the description, serve to explain the principles of the 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 to be used in the embodiments or the prior art text will be briefly introduced below. Obviously, for those skilled in the art, other drawings can also be obtained without creative labor based on these drawings.

[0044] One or more embodiments are exemplarily illustrated by the pictures in the corresponding drawings, which do not constitute a limitation on the embodiments. Elements with the same reference numerals in the drawings represent similar elements, unless otherwise specified. The drawings in the drawings do not constitute a proportional limitation.

[0045] Figure 1 A structural schematic diagram of a battery cooling system of a vehicle provided by the embodiments of the present application;

[0046] Figure 2 An embodiment flowchart of a power supply module heat dissipation method of a vehicle provided by the embodiments of the present application;

[0047] Figure 3Another embodiment flow chart of a method for cooling a power supply module of a vehicle is provided in accordance with an embodiment of the present application;

[0048] Figure 4 Another embodiment flow chart of a method for cooling a power supply module of a vehicle is provided in accordance with an embodiment of the present application;

[0049] Figure 5 Another embodiment flow chart of a method for cooling a power supply module of a vehicle is provided in accordance with an embodiment of the present application;

[0050] Figure 6 Another embodiment block diagram of a device for cooling a power supply module of a vehicle is provided in accordance with an embodiment of the present application;

[0051] Figure 7 Another embodiment block diagram of a device for cooling a power supply module of a vehicle is provided in accordance with an embodiment of the present application; DETAILED DESCRIPTION

[0052] In order to make the objects, technical solutions and advantages of the embodiments of the present application clearer, the following will clearly and completely text the technical solutions in the embodiments of the present application with reference to the drawings in the embodiments of the present application. Obviously, the embodiments described in the text are only a part of the embodiments of the present application, rather than all the embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by a person of ordinary skill in the art without creative work fall within the scope of protection of the present application.

[0053] The following disclosure provides many different embodiments, or examples, for implementing different structures of the present application. For the purpose of simplifying the present application, certain examples of components and arrangements are texted in the following. Of course, they are merely examples and are not intended to limit the present application. Furthermore, the present application can repeat reference numerals and / or letters in different examples. Such repetition is for the purpose of simplicity and clarity and does not indicate the relationship between the various embodiments and / or arrangements discussed.

[0054] In order to solve the technical problem in the prior art that when the opening degree of the expansion valve is adjusted according to the target overheat degree and the actual overheat degree of the battery, the PI adjustment has overshoot phenomenon due to the delay of the target overheat degree feedback, which affects the stability of the battery cooling system of the vehicle, thereby reducing the performance and stability of the battery, and affecting the performance of the vehicle, the application provides a power supply module heat dissipation method and device of a vehicle, a vehicle and a storage medium, which can set an overheat degree adjustment range of the power supply module of the vehicle affected by the heat release rate of the power supply module in advance, and feed back the heat release rate of the power supply module through the trend of current change, when it is determined that the overheat degree adjustment value corresponding to the current overheat degree adjustment range of the power supply module meets the preset range, and the heat release rate meets the preset condition that may affect the overheat degree adjustment, the adjustment coefficient for adjusting the opening degree of the valve is determined through the current change value of the heat supply module, so as to determine the target opening degree of the preset control valve on the basis of the adjustment coefficient, thereby introducing the influence factor of the battery heat release rate into the control of the preset control valve, realizing accurate control of the opening degree of the preset control valve, reducing the overshoot phenomenon of PI adjustment of the preset control valve, and improving the heat dissipation efficiency of the power supply module of the vehicle.

[0055] In order to facilitate understanding of the power supply module heat dissipation method of the vehicle provided by the embodiments of the application, the battery cooling system of the vehicle related to the power supply module heat dissipation method provided by the application will be exemplified first.

[0056] Referring to Figure 1 A structural schematic diagram of a battery cooling system of a vehicle provided by an embodiment of the application is shown in the figure. Figure 1 As shown in the figure, the battery cooling system 10 can 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] 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 by the refrigerant, so as to obtain the low-temperature steam corresponding to the refrigerant, and the size and type of the evaporator 11 are not limited in the embodiments of the application.

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

[0059] The above-mentioned condenser 13 is used to release heat to the outside world for the input superheated steam, so as to condense the superheated steam into subcooled liquid as refrigerant, and the type and size of the condenser 13 are not limited in the embodiments of the application.

[0060] The above straight cooling plate 14 is used to obtain corresponding low-temperature steam by circulating flow of coolant to take away the heat generated by the power battery. The type and size of the straight cooling plate 14 are not limited in the embodiment.

[0061] The above expansion valve 15 is used to control the flow of coolant to the evaporator 11. The type and size of the expansion valve 15 are not limited in the embodiment.

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

[0063] The above power battery 17 is the source of heat generation. The type and size of the power battery are not limited in the embodiment.

[0064] In an 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 evaporation transformation into 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 temperature of the power battery 17 is reduced by directly absorbing the heat of the liquid coolant through the straight cooling plate 14, thereby ensuring the stable operation of the battery system. Subsequently, the coolant that has absorbed heat (whether it is steam after evaporation in the evaporator 11 or liquid coolant heated in the power battery 17) is absorbed and compressed into superheated steam by the compressor 12 and then flows into the condenser 13. In the condenser 13, the superheated steam of the coolant transfers heat to the outside air passing through the condenser 13, thereby being cooled and liquefied into liquid coolant. The liquid coolant then enters the evaporator 11 and the power battery 17 again through the adjustment of the expansion valve 15 and the expansion valve 16, starting a new round of cooling cycle.

[0065] Currently, in vehicle operation, the thermal management of the battery cooling system plays an important role in the safety of vehicle operation. For the thermal management of the vehicle battery, there is a straight cooling way of coolant plate to dissipate the heat generated by the battery during vehicle operation. In the straight cooling way of coolant plate, the coolant plate can be connected to an expansion valve, and the flow of coolant in the coolant plate is controlled by controlling the opening of the expansion valve, thereby controlling the outlet superheat degree of the coolant plate.

[0066] In the related art, when the expansion valve is controlled, the PI adjustment of the expansion valve opening degree is performed through the difference between the target superheat degree and the current superheat degree of the battery. However, in actual application, when the vehicle appears sudden acceleration or sudden deceleration, etc., the stability of the system fluctuates, and the heat dissipation rate of the battery also fluctuates in the change cycle, which causes the target superheat degree of the battery to fluctuate. Therefore, when the PI adjustment of the expansion valve opening degree is performed according to the target superheat degree and the actual superheat degree of the battery, due to the delay of the target superheat degree feedback, the PI adjustment appears overshoot, which affects the stability of the battery cooling system of the vehicle, thereby reducing the performance and stability of the battery and affecting the performance of the vehicle.

[0067] To this end, the application provides a heat dissipation method for a power supply module of a vehicle. The heat dissipation method includes the following steps: setting a superheat degree adjustment range of the power supply module, which is affected by a heat dissipation rate of the power supply module; and feeding back the heat dissipation rate of the power supply module according to a current change trend of a current. When it is determined that a superheat degree adjustment value corresponding to a current superheat degree adjustment range of the power supply module satisfies the preset range and the heat dissipation rate satisfies a preset condition that may affect the superheat degree adjustment, an adjustment coefficient for adjusting an opening degree of a control valve is determined according to a current change value of the power supply module, and a target opening degree of the control valve is determined based on the adjustment coefficient. Thus, the control of the control valve is introduced into the influencing factor of the heat dissipation rate of the battery, the opening degree of the control valve is accurately controlled, the control valve is accurately controlled, the overshoot of the PI adjustment of the control valve is reduced, and the heat dissipation efficiency of the power supply module of the vehicle is improved.

[0068] The heat dissipation method for the power supply module of the vehicle provided by the application will be further explained in detail below with reference to the accompanying drawings and specific embodiments. The embodiments do not limit the embodiments of the application.

[0069] Participation Figure 2 An embodiment flowchart of the heat dissipation method for the power supply module of the vehicle provided by the application is shown. As an embodiment, Figure 2 The flowchart shown can be applied to a battery cooling system of a vehicle, for example Figure 1 The cooling system 10 shown. As Figure 2 The flowchart can include the following steps:

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

[0071] Step 202, when it is determined that the superheat degree adjustment value is within a preset range and the heat dissipation rate of the power supply module satisfies a preset condition based on the current change value, an adjustment coefficient for the control valve is determined according to the current change value.

[0072] The following describes steps 201 and 202 together:

[0073] The power supply module refers to a module for supplying power to the vehicle, for example Figure 1 The power battery 17 of the cooling system 10.

[0074] The overheat adjustment range refers to the overheat adjustment range affected by the heat dissipation rate of the power supply module when adjusting the power supply module of the vehicle, which is used to measure the degree of heat dissipation required by the power supply module.

[0075] The overheat adjustment value refers to the heat dissipation amount or cooling degree that the power supply module should adjust based on the current overheat.

[0076] The current change value refers to the current value of the current change of the power supply module, which can be used to feedback the heat dissipation rate of the power supply module. Optionally, the current change value can be positively correlated with the heat dissipation rate of the power supply module, that is, the greater the current change value of the power supply module, the greater the heat dissipation rate.

[0077] The preset range refers to the preset overheat adjustment range of the power supply module affected by the heat dissipation rate of the power supply module when adjusting the opening of the preset control valve, that is, when the overheat adjustment value of the power supply module is within the preset range, the opening of the preset control valve is adjusted by PI, and the heat dissipation rate of the power supply module is affected. For example, when the overheat adjustment value is (5, -5), the deviation between the current overheat value and the target value is small, at this time the influence of the battery heat dissipation rate on the PI adjustment trend is large, and when the overheat adjustment value is (25, 5) or (-5, -10), the overheat deviation is large, and the battery cooling system has not entered the steady state adjustment process, at this time the change of the battery heat dissipation rate can be ignored.

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

[0079] The preset condition refers to the condition when the heat dissipation rate of the power supply module fluctuates greatly within the preset change period, thereby affecting the overheat adjustment, for example, the change value of the heat dissipation rate of the power supply module within the change period is greater than the preset change threshold.

[0080] Since the change value of the heat dissipation rate of the power supply module cannot be directly obtained, the change trend of the heat dissipation 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 dissipation rate of the power supply module meets the preset condition.

[0081] The aforementioned adjustment coefficient refers to the coefficient used to adjust the opening degree of the preset control valve. Through this adjustment coefficient, the opening degree of the preset control valve can be adjusted more accurately, thereby achieving more precise heat dissipation of the vehicle's power supply module. This application embodiment does not limit this.

[0082] In some embodiments of this application, to prevent a delay in target overheat feedback during vehicle operation when the power supply module adjusts the expansion valve opening based on the target overheat and actual overheat of the battery during heat dissipation, the executing entity of this application can obtain the overheat adjustment value and current change value corresponding to the current overheat adjustment range of the power supply module during vehicle operation.

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

[0084] Optionally, if the superheat adjustment value is determined to be within the preset range, and the heat release rate of the power supply module is determined to meet the 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 overheat adjustment value and current change value corresponding to the current overheat adjustment range of the power supply module, and how to determine whether the heat dissipation rate of the power supply module meets the preset conditions based on the current change value, it can be explained in the following text. Figure 3 The process shown will be explained in detail here.

[0086] The specific method for determining the adjustment coefficient for the preset control valve based on the current change value will be explained below. Figure 4 The process shown will be explained in detail here.

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

[0088] The aforementioned preset control valve refers to a preset control valve that controls the amount of refrigerant used to cool the power supply module, for example... Figure 1 Expansion valve 15 of intermediate cooling system 10.

[0089] The target opening degree mentioned above 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 degree of the preset control valve is determined based on the overheating adjustment value and the adjustment coefficient, and the preset control valve is controlled to open according to the target opening degree to dissipate heat for the power supply module, so as to accurately control the opening degree of the preset control valve and reduce the overshoot phenomenon of PI adjustment of the preset control valve, thereby improving the heat dissipation efficiency of the power supply module of the vehicle.

[0091] As to how to determine the target opening degree of the preset control valve based on the overheating adjustment value and the adjustment coefficient, the following Figure 4 will be described, which will not be described in detail here.

[0092] The technical scheme provided by the embodiments of the present application acquires the overheating adjustment value and the current change value corresponding to the current overheating adjustment range of the power supply module during the operation of the vehicle, determines the adjustment coefficient for the preset control valve based on the current change value when the overheating adjustment value is within the preset range and the heat release rate of the power supply module meets the preset condition based on the current change value, determines the target opening degree of the preset control valve based on the overheating adjustment value and the adjustment coefficient, and controls the preset control valve to open according to the target opening degree to dissipate heat for the power supply module. This technical scheme sets the overheating adjustment range of the power supply module of the vehicle in advance, which 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 overheating adjustment value corresponding to the current overheating adjustment range of the power supply module meets the preset range and the heat release rate meets the preset condition that may affect the overheating adjustment, the adjustment coefficient for adjusting the opening degree of the preset control valve is determined based on the current change value of the power supply module, so as to determine the target opening degree 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, accurately controlling the opening degree of the preset control valve, accurately controlling the preset control valve, reducing the overshoot phenomenon of PI adjustment of the preset control valve, and improving the heat dissipation efficiency of the power supply module of the vehicle.

[0093] Referring to Figure 3 , another embodiment flowchart of the method for dissipating heat for the power supply module of the vehicle provided by the embodiments of the present application is provided. Figure 3 The flowchart is shown in Figure 2 , which describes in detail how to acquire the overheating adjustment value corresponding to the current overheating adjustment range of the power supply module and the current change value, and determine that the heat release rate of the power supply module meets the preset condition based on the current change value. As Figure 3 shown, the flowchart can include the following steps:

[0094] Step 301, acquiring the current overheating degree and the target overheating degree of the power supply module.

[0095] Step 302, difference between the current superheat and the target superheat is obtained, and the superheat adjustment value corresponding to the current superheat adjustment range of the power supply module is obtained.

[0096] The following describes steps 301 to 302:

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

[0098] The target superheat refers to the superheat of the power supply module to be reached when the power supply module is refrigerated. At the target superheat, the stability and safety of the power supply module are higher.

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

[0100] As an optional implementation, the superheat at the outlet of the refrigeration module (for example Figure 1 The direct cooling plate 14) in the refrigeration system for refrigerating the power supply module can be obtained, 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 period to which the power supply module belongs, and obtain the last average current value of the last preset period.

[0102] Step 304, the absolute value of the difference between the average current value and the last average current value is determined as the current change value of the power supply module.

[0103] The following describes steps 303 to 304:

[0104] The preset period refers to a preset collection period for collecting the current of the power supply module, which can be 1 hour, 30 minutes, or 10 minutes, etc. The embodiments of the present application do not limit this.

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

[0106] The last average current value refers to the average current value corresponding to the last preset period adjacent to the current preset period.

[0107] The absolute value of the difference between the average current value and the previous average current value is obtained by subtracting the previous average current value from the average current value in the current preset period, and then 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) to obtain a subtraction result of -15A, and the absolute value of the subtraction result is 15A. Therefore, 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) to obtain a subtraction result of 15A, and the absolute value of the subtraction result is 15A. Therefore, 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 period of the power supply module is determined, and the previous average current value of the previous period of the current preset period is determined. The average current value of the current preset period is subtracted from the average current value of the previous period of the current preset period 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 period is 10A, and the average current value of the second period is 15A. The second period is the next period of the first period, and the second period is the current period. Therefore, the average current value of the current preset period is 15A, and the previous average current value of the previous preset period is 10A. The average current value (15A) in the current preset period is subtracted from the average current value (10A) in the previous period 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, 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 current values is calculated to obtain the average current value corresponding to the current preset period.

[0110] Step 305, determining the average vehicle speed of the current preset period to which the vehicle belongs, and obtaining the previous average vehicle speed of the previous preset period.

[0111] Step 306, determining the absolute value of the difference between the average vehicle speed and the previous average vehicle speed as the change speed of the vehicle.

[0112] The steps 305 to 306 are described as follows:

[0113] The average vehicle speed refers to an average value of a vehicle speed in a current preset period during vehicle operation. The average vehicle speed and the average current value correspond to a unified period, that is, the average vehicle speed and the average current value are average vehicle speeds and average currents of the vehicle in the current preset period.

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

[0115] The absolute value of the difference between the average vehicle speed and the last average vehicle speed refers to subtracting the average vehicle speed in the current preset period from the average vehicle speed in the last period of the current preset period to obtain a subtraction result, and obtaining an absolute value of the subtraction result. For example, the average vehicle speed is 5 m / s, the last average vehicle speed is 20 m / s, the average vehicle speed (5 m / s) is subtracted from the last average vehicle speed (20 m / s) to 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. Conversely, the average vehicle speed is 20 m / s, the last average vehicle speed is 5 m / s, the average vehicle speed (20 m / s) is subtracted from the last average vehicle speed (5 m / s) to 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 the embodiment of the application, during vehicle operation, an average value of a vehicle speed in a current preset period and an average value of a vehicle speed in a last period of the current preset period are determined, the average value of the vehicle speed in the current preset period is subtracted from the average value of the vehicle speed in the last period of the current preset period to obtain a subtraction result, and an absolute value of the subtraction result is obtained to obtain a change speed of the vehicle. For example, the average value of the vehicle speed in the current period (the second period) is 20 m / s, the average value of the vehicle speed in the first period is 5 m / s, the first period is the last period of the second period, and the second period is the current period. Therefore, the average value of the vehicle speed in the current preset period is 20 m / s, the average value of the vehicle speed in the last period of the current preset period is 5 m / s, the average value of the vehicle speed in the current preset period (20 m / s) is subtracted from the average value of the vehicle speed in the last period of the current preset period (5 m / s) to obtain a subtraction result (15 m / s), and the absolute value (15 m / s) of the subtraction result (15 m / s) is obtained to obtain a change speed of the vehicle (15 m / s).

[0117] In step 307, it is determined that the heat dissipation rate of the power supply module meets the preset condition when the change 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.

[0118] The preset vehicle speed change threshold refers to a preset average vehicle speed value, which can be used to measure whether the speed of the vehicle changes rapidly, for example, rapid acceleration or rapid deceleration, etc. The preset vehicle speed change threshold can be 15 km / h, or 10 km / h, and the embodiments of the present application do not limit this.

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

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

[0121] Optionally, in the case where the change 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 indicates that the speed of the vehicle changes rapidly at this time, and the heat dissipation rate of the power supply module changes. At this time, if the opening degree of the preset control valve is adjusted by PI, overshoot will occur due to the influence of the heat dissipation rate, so it can be determined that the heat dissipation rate of the power supply module meets the preset condition.

[0122] For example, assuming that the preset current change threshold is 10 A, the current change value of the power supply module is 15 A, the current change value (15 A) is greater than the preset current change threshold (10 A), the preset vehicle speed change threshold is 10 m / s, and the change speed of the vehicle is 20 m / s, the change speed (20 m / s) is greater than the preset vehicle speed change threshold (10 m / s), so the case where the change 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 is met. On the contrary, the preset current change threshold is 10 A, the current change value of the power supply module is 5 A, the current change value (5 A) is less than the preset current change threshold (10 A), the preset vehicle speed change threshold is 10 m / s, and the change speed of the vehicle is 5 m / s, the change speed (5 m / s) is less than the preset vehicle speed change threshold (10 m / s), so the case where the change 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 is not met, that is, the heat dissipation rate of the power supply module does not meet the preset condition.

[0123] Wherein, according to the lithium ion battery heat release formula, the current change trend can feedback the battery heat release rate change, the lithium ion battery heat release formula is shown in formula (I) as follows:

[0124]

[0125] The above Q is the battery heat release, the above V is the battery volume, the above I is the battery discharge instantaneous current, R J is the battery joule resistance, R P is the battery internal resistance, U OCV is the open circuit voltage of the battery. Through the above lithium ion battery heat release formula (I), it can be found that the battery charging and discharging current I is positively correlated with the heat release rate Q, the battery volume V, the battery internal resistance R P and the open circuit voltage U OCV of the battery are all fixed parameters of the battery, and the battery discharge instantaneous current changes with the running state of the vehicle, so the change trend of the battery current can directly reflect the change trend of the battery heat release. Therefore, it can be determined that the current change trend can feedback the battery heat release rate change.

[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 10m / s, and the change vehicle speed of the vehicle is 20m / s, the change vehicle speed (20m / s) is greater than the preset vehicle speed change threshold (10m / s), then the change vehicle speed greater than or equal to the preset vehicle speed change threshold and the current change value greater than or equal to the preset current change threshold, which means that the vehicle speed changes rapidly at this time, and the heat release rate of the power supply module increases, so if the PI regulation is performed on the opening of the preset control valve, the overshoot phenomenon will occur due to the influence of the heat release rate, therefore it can be determined that the heat release rate of the power supply module meets the preset condition.

[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 10m / s, and the change vehicle speed of the vehicle is 5m / s, the change vehicle speed (5m / s) is less than the preset vehicle speed change threshold (10m / s), then the change vehicle speed greater than or equal to the preset vehicle speed change threshold and the current change value greater than or equal to the preset current change threshold, which means that the heat release rate of the power supply module does not meet the preset condition.

[0128] The technical scheme provided by the embodiments of the present application comprises the following steps: obtaining a current overheat degree and a target overheat degree of a power supply module, and obtaining an overheat degree adjustment value corresponding to a current overheat degree adjustment range of the power supply module by subtracting the current overheat degree from the target overheat degree; determining an average current value of a current preset period to which the power supply module currently belongs, and obtaining a previous average current value of a previous preset period; determining a current change value of the power supply module as an absolute value of a difference between the average current value and the previous average current value; determining an average vehicle speed of the current preset period to which the vehicle currently belongs, and obtaining a previous average vehicle speed of the previous preset period; determining a change vehicle speed as an absolute value of a difference between the average vehicle speed and the previous average vehicle speed; and determining that a heat dissipation rate of the power supply module meets a preset condition when the change 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. This technical scheme determines whether an overshoot phenomenon occurs when the preset control valve opening degree is adjusted by using the overheat degree adjustment value, the current change value, and the change vehicle speed of the vehicle, and accurately determines whether the heat dissipation rate of the power supply module meets the preset condition when the overheat degree adjustment value is in a preset range.

[0129] Referring to Figure 4 An embodiment flowchart of a vehicle power supply module heat dissipation method provided by the embodiments of the present application is shown. Figure 4 The flowchart shown in Figure 2 Based on the flowchart shown in Figure 4 The flowchart can comprise the following steps:

[0130] Step 401: determining a target corresponding relationship containing the current change value from a plurality of corresponding relationships between current change values and adjustment coefficients of the power supply module according to the current change value; wherein the adjustment coefficient is in a direct proportional relationship with the current change value when the current change value is less than a preset value, and the adjustment coefficient is in an inverse proportional relationship with the current change value when the current change value is greater than the preset value.

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

[0132] The following describes steps 401 to 402:

[0133] The aforementioned correspondence between current change values ​​and adjustment coefficients refers to the pre-set correspondence between current change values ​​and adjustment coefficients. This correspondence can be represented in tabular form or in dot plot form; this application embodiment does not impose any limitations on this. Specifically, this correspondence indicates that when the current change value decreases, the target opening of the expansion valve obtained by the corresponding PI adjustment needs to be corrected and reduced to adapt to the current change trend.

[0134] The aforementioned adjustment coefficient refers to the coefficient used to adjust the opening degree of the preset control valve. This adjustment coefficient allows for more precise adjustment of the preset control valve's opening degree, thereby achieving more accurate heat dissipation for the vehicle's power supply module. This application's embodiments do not impose limitations on this. For example, Figure 1 The opening degree of the expansion valve 16 is accurately adjusted by adjusting the coefficient. This application does not limit the scope of the embodiments.

[0135] The aforementioned target correspondence refers to the correspondence between the determined current change value and the adjustment coefficient.

[0136] In some embodiments of this application, by Figure 3 As shown in the process diagram, the change in current of the power supply module can reflect the change in the heat dissipation rate of the power supply module. However, the change in the heat dissipation rate of the power supply module will cause overshoot in the PI regulation 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 dissipation rate of the power supply module, the correspondence between different current change values ​​and the adjustment coefficient can be preset. Then, the adjustment coefficient for adjusting the preset control valve opening can be determined based on the current change value, and the preset control valve opening can be adjusted based on the adjustment coefficient.

[0137] As an optional implementation, a target correspondence including the current change value can be determined from a preset correspondence between multiple current change values ​​and adjustment coefficients of the power supply module, based on the aforementioned current change value. Specifically, when the current change value is less than the preset value, the adjustment coefficient is directly proportional to the current change value; when the current change value is greater than the preset value, the adjustment coefficient is inversely proportional to the current change value. This adjustment coefficient table indicates that when the current heat dissipation rate decreases (i.e., the absolute value of the current change value decreases), the target opening of the expansion valve obtained by the corresponding PI regulation needs to be corrected and reduced.

[0138] As an exemplary implementation, a preset adjustment coefficient table can be searched using the current change value as a keyword to obtain a target correspondence containing the current change values. The adjustment coefficients contained in the target correspondence are then determined as the adjustment coefficients for a preset control valve. The aforementioned adjustment coefficient table contains the correspondence between the current change values ​​of the power supply module and the adjustment coefficients. The aforementioned 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 the current variation value is 20, the preset adjustment coefficient table is searched with the current variation value (20) as the key, and a target corresponding relationship containing the current variation value (i.e., the current variation value 20 corresponds to the adjustment coefficient 1.15) is obtained. The adjustment coefficient 1.15 in the target corresponding relationship is taken as the adjustment coefficient for the preset control valve. When the preset value is 30, the current variation value (20) is less than the preset value (30), and the adjustment coefficient is in a positive proportional relationship with the current variation value. When the preset value is 10, the current variation value (20) is greater than the preset value (10), and the adjustment coefficient is in an inverse proportional relationship with the current variation value.

[0142] As an exemplary embodiment, when the preset adjustment coefficient table is searched with the current variation value as the key, the corresponding relationship containing the key is determined as the target corresponding relationship, optionally, if the key is found in the adjustment coefficient table.

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

[0144] Subsequently, the first difference between the maximum value and the current variation value, and the second difference between the current variation difference and the minimum value are determined, and the ratio of the first difference to the second difference is determined. Based on the determined ratio, the maximum adjustment coefficient corresponding to the maximum value and the minimum adjustment coefficient corresponding to the minimum value are determined from the above target corresponding relationships. Subsequently, the adjustment coefficient for the preset control valve is determined according to the above ratio, the above maximum adjustment coefficient, and the minimum adjustment coefficient.

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

[0146]

[0147] wherein 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, the current variation value is 25, the corresponding maximum value is 45, and the minimum value is 20, so 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. The maximum adjustment coefficient amax (1.35), the 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) Substituting the above formula (two), the adjustment coefficient x of the preset control valve (1.19) can be calculated.

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

[0150] Step 403, according to the superheat adjustment value, determine the first proportional factor and the first integral factor from the preset correspondence between the superheat adjustment value and the adjustment coefficient, wherein the adjustment coefficient includes the proportional factor and the 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, according to the preset adjustment function, calculate the superheat adjustment value, the first proportional factor, the first integral factor, and the initial opening to obtain the first opening of the preset control valve.

[0153] The following describes steps 403-405:

[0154] The first proportional factor refers to the parameter for adjusting according to the current deviation during PI adjustment, which determines the response speed of the deviation.

[0155] The first integral factor refers to the long-term adjustment by accumulating previous deviations during PI adjustment to ensure that the final state can reach a stable state.

[0156] The initial opening refers to the initial opening value of the preset control valve before being adjusted when the power supply module is cooled, which can be a value preset according to the vehicle type of the vehicle.

[0157] The adjustment function refers to a function preset for PI adjustment of the opening of the preset control valve.

[0158] The first opening refers to the opening of the preset control valve determined by the adjustment function, which 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 the preset control valve under the current working condition, the opening value before adjustment by the adjustment coefficient can be determined by the preset adjustment function.

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

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

[0162] Table 2

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

[0164] For example, the superheat adjustment value is 15, and according to the superheat adjustment value (15) from Table 2, the second proportional factor is 19 and the second integral factor is 2.5.

[0165] Then, the vehicle type of the vehicle can be obtained, and the initial opening degree of the preset control valve can be determined according to the vehicle type. The vehicle type can refer to the driving type of the vehicle, such as pure electric driving or extended range driving (electric driving + fuel driving), and the like. For example, when the vehicle type is extended range driving, the initial opening degree of the preset control valve is 10, and when the vehicle type is pure electric driving, the initial opening degree 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 degree can be calculated according to a preset adjustment function to obtain the first opening degree of the preset control valve.

[0167] As an exemplary embodiment, the first opening degree of the preset control valve can be determined by the adjustment function shown in the following formula (III):

[0168]

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

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

[0171] The target opening degree refers to the final opening degree of the preset control valve after adjustment, that is, the opening degree of the preset control valve can be adjusted according to the target opening degree, which is not limited by the embodiments of the present application.

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

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

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

[0175] When the overheat adjustment range is not in the preset range and / or the heat dissipation rate of the power supply module does not meet the preset condition, the adjustment can be performed through the flowchart shown in FIG. 5, which is described below with reference to FIG. 5. Figure 5 FIG. 5 is another embodiment flowchart of a method for dissipating heat of a power supply module of a vehicle provided by an embodiment of the present application. As shown in FIG. 5, the flowchart can include the following steps: Figure 5 Figure 5 Step 501: determining a second proportional factor and a second integral factor from a preset correspondence between an overheat adjustment value and adjustment parameters according to the overheat adjustment value, wherein the adjustment parameters can include proportional factors and integral factors.

[0176] Step 502: obtaining a vehicle type of a vehicle and determining an initial opening degree of a preset control valve according to the vehicle type.

[0177] Step 503: calculating an overheat adjustment value, a second proportional factor, a second integral factor, and an initial opening degree according to a preset adjustment function to obtain a second opening degree of a preset control valve.

[0178] The following describes steps 501-503:

[0179] The following describes steps 501-503:

[0180] ​The preset overheat adjustment value and the adjustment parameter correspond to each other, which means that the preset overheat adjustment value and the adjustment parameter correspond to each other. The adjustment parameter can include a proportional factor and an integral factor. Therefore, the correspondence relationship can include the correspondence relationship among the overheat adjustment value, the proportional factor, and the integral factor. The correspondence relationship can be represented in the form of a table or a point graph, and the embodiments of the present application do not limit the form of the correspondence relationship.

[0181] The second proportional factor is a parameter for adjusting the current deviation during PI adjustment, which determines the response speed of the deviation.

[0182] The second integral factor is a parameter for long-term adjustment by accumulating previous deviations during PI adjustment, which ensures that the system can eventually reach a stable state.

[0183] The initial opening degree is the initial opening degree value of the control valve before being adjusted when the power supply module is cooled, which can be a value preset according to the vehicle type of the vehicle.

[0184] The adjustment function is a function preset for PI adjustment of the opening degree of the control valve.

[0185] The second opening degree is the opening degree of the control valve determined by the adjustment function, which is used to control the opening degree of the control valve.

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

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

[0188] As an exemplary embodiment, the second proportional factor and the second integral factor can be determined from the preset adjustment parameter table according to the overheat adjustment value. The adjustment parameter table can include the correspondence relationship between the overheat adjustment value and the adjustment parameter, which can be shown in Table 3 as follows:

[0189] Table 3

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

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

[0192] Then, a vehicle type of the vehicle can be acquired, and an initial opening degree of the preset control valve is determined according to the vehicle type. The vehicle type can refer to a driving type of the vehicle, such as pure electric driving or extended range driving (electric driving + fuel driving), and the like. For example, when the vehicle type is extended range driving, the initial opening degree of the preset control valve is 10, and when the vehicle type is pure electric driving, the initial opening degree of the preset control valve is 20.

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

[0194] As an exemplary embodiment, the second opening degree of the preset control valve can be determined by an adjustment function shown in the following formula (four):

[0195]

[0196] wherein diff is the overheat adjustment value, p is the second proportional factor, I is the second integral factor, p v is the initial opening degree, and p req is the second opening degree of the preset control valve.

[0197] Step 504: Controlling the preset control valve to open at the second opening degree to dissipate heat of the power supply module.

[0198] In some embodiments of the present application, the preset control valve is controlled to open at the second opening degree to dissipate heat of the power supply module.

[0199] Steps 501-504 describe that when the overheat adjustment range is not within the preset range, and / or the heat dissipation rate of the power supply module determined based on the current change value does not satisfy the preset condition, the second proportional factor and the second integral factor are determined from the preset adjustment parameter table according to the overheat adjustment value, the vehicle type of the vehicle is acquired, the initial opening degree of the preset control valve is determined according to the vehicle type, the overheat adjustment value, the second proportional factor, the second integral factor, and the initial opening degree are calculated according to the preset adjustment function to obtain the second opening degree of the preset control valve, and the preset control valve is controlled to open at the second opening degree to dissipate heat of the power supply module.

[0200] The technical scheme provided by the embodiment of the application comprises the following steps: a preset adjustment coefficient table is searched by taking a current change value as a keyword to obtain a target corresponding relationship containing the current change value, and the adjustment coefficient table contains a corresponding relationship between the current change value of a power supply module and an adjustment coefficient; in a case where the current change value is less than a preset value, the adjustment coefficient is in a direct proportional relationship with the current change value, and in a case where the current change value is greater than the preset value, the adjustment coefficient is in an inverse proportional relationship with the current change value; an adjustment coefficient contained in the target corresponding relationship is determined as an adjustment coefficient for a preset control valve; a first proportional factor and a first integral factor are determined from a preset corresponding relationship between overheating degree adjustment values and adjustment coefficients according to the overheating degree adjustment value, wherein the adjustment coefficient comprises the proportional factor and the integral factor; a vehicle type of the vehicle is obtained, and an initial opening degree of the preset control valve is determined according to the vehicle type; the overheating degree adjustment value, the first proportional factor, the first integral factor and the initial opening degree are calculated according to a preset adjustment function to obtain a first opening degree of the preset control valve; and the first opening degree is adjusted according to the adjustment coefficient to obtain a target opening degree of the preset control valve. This technical scheme can more accurately adjust the opening degree of the preset control valve by determining the adjustment coefficient according to the current change value, because the current change value can reflect the heat dissipation rate of the power supply module of the vehicle, and the target opening degree of the preset control valve can be more accurately determined by further adjusting the first opening degree according to the adjustment coefficient after the first opening degree of the preset control valve is determined by PI adjustment.

[0201] Referring to Figure 6 An embodiment of a vehicle power supply module heat dissipation device is provided in the embodiment of the application, as an embodiment, Figure 6 The device shown can be applied to a battery cooling system of a vehicle, and the battery cooling system controls the flow of refrigerant for heat dissipation of a power supply module in the vehicle by controlling the opening degree of a preset control valve, such as Figure 6 The device can comprise:

[0202] The obtaining module 61 is configured to obtain an overheating degree adjustment value and a current change value corresponding to an overheating degree adjustment range of the power supply module during the operation of the vehicle.

[0203] The determining module 62 is configured to determine an adjustment coefficient for the preset control valve according to the current change value in a case where the overheating degree adjustment value is in a preset range and the heat dissipation rate of the power supply module determined based on the current change value meets a preset condition.

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

[0205] As Figure 7 shown, a structural schematic diagram of a vehicle provided by an embodiment of the present application includes a power supply module 71 and a battery cooling system 72, which can 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 complete mutual communication through the communication bus 724,

[0206] The battery cooling system 72 is used to dissipate heat for the power supply module 71.

[0207] The memory 723 is used to store a computer program.

[0208] In an embodiment of the present application, when the processor 721 executes the program stored in the memory 723, the vehicle power supply module heat dissipation method provided by any one of the preceding method embodiments is implemented, including:

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

[0210] In a case where it is determined that the overheat degree adjustment value is within a preset range and that the heat dissipation rate of the power supply module meets a preset condition based on the current change value, an adjustment coefficient for the preset control valve is determined according to the current change value;

[0211] Based on the overheat degree adjustment value and the adjustment coefficient, a target opening degree of the preset control valve is determined, and the preset control valve is controlled to open according to the target opening degree, so as to dissipate heat for the power supply module.

[0212] The embodiment of the present application also provides a storage medium having a computer program stored thereon, and the computer program is executed by a processor to implement the steps of the vehicle power supply module heat dissipation method provided by any one of the preceding method embodiments.

[0213] The device embodiments of the above text are only schematic, wherein the units described as separate components can or can not be physically separated, and the components shown as units can or can not be physical units, i.e., they can be located in one place, or distributed on multiple network units. According to actual needs, part or all of the modules can be selected to achieve the purpose of the embodiment scheme.

[0214] Those skilled in the art can clearly understand the above-mentioned embodiments through the text of the embodiments that the various embodiments can be realized by means of software plus a general hardware platform, and of course, can also be realized by hardware. Based on such understanding, the above technical solutions 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 a ROM / RAM, a magnetic disk, an optical disk, and the like, and includes a plurality of instructions to make a computer device (which can be a personal computer, a server, or a network device, etc.) execute the methods described in the various embodiments or some parts of the embodiments.

[0215] It is to be understood that the terminology used herein is for the purpose of describing particular example embodiments only and is not intended to be limiting. As used herein, the singular forms "a", "an" and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise. The terms "comprises", "comprising", "includes", "including" and "has" are inclusive and therefore specify the presence of stated features, steps, operations, elements, and / or components, but do not preclude the presence or addition of one or more other features, steps, operations, elements, components, and / or groups thereof. The method steps, processes, and operations described herein are not to be construed as necessarily requiring their performance in the particular order in which they are described unless specifically indicated as such. It is also to be understood that additional or alternative steps can be employed.

[0216] The above description is merely that of a specific implementation of the present application, and 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 these embodiments shown herein, but will conform to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A method for cooling a power supply module in a vehicle, characterized in that, A battery cooling system applied to a vehicle controls the flow of refrigerant for heat dissipation of a power supply module in the vehicle by controlling the opening degree of a preset control valve, and the method comprises: During the operation of the vehicle, a current overheat adjustment value corresponding to an overheat adjustment range of the power supply module and a current change value are obtained; In a case where the overheat adjustment value is determined to be within a preset range and the heat dissipation rate of the power supply module is determined to meet a preset condition based on the current change value, an adjustment coefficient for the preset control valve is determined according to the current change value; The target opening degree of the preset control valve is determined based on the overheat adjustment value and the adjustment coefficient, and the preset control valve is controlled to open at the target opening degree to dissipate heat from the power supply module.

2. The method of claim 1, wherein, The overheat adjustment value corresponding to the overheat adjustment range of the power supply module and the current change value are obtained, comprising: The current overheat and the target overheat of the power supply module are obtained; The difference between the current overheat and the target overheat is obtained to obtain the overheat adjustment value corresponding to the overheat adjustment range of the power supply module; The average current value of the current preset period to which the power supply module belongs is determined, and the last average current value of the last preset period is obtained; The absolute value of the difference between the average current value and the last average current value is determined as the current change value of the power supply module.

3. The method of claim 1, wherein, The heat dissipation rate of the power supply module is determined to meet the preset condition based on the current change value, comprising: The average vehicle speed of the current preset period to which the vehicle currently belongs is determined, and the last average vehicle speed of the last preset period is obtained; The absolute value of the difference between the average vehicle speed and the last average vehicle speed is determined as the change speed of the vehicle; In a case where the change 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 dissipation rate of the power supply module meets the preset condition.

4. The method of claim 1, wherein, The adjustment coefficient for the preset control valve is determined according to the current change value, comprising: According to the current change value, a target corresponding relationship containing the current change value is determined from a plurality of corresponding relationships between current change values and adjustment coefficients of the power supply module; wherein, in a case where the current change value is less than a preset value, the adjustment coefficient is in a positive proportional relationship with the current change value, and in a case where the current change value is greater than a preset value, the adjustment coefficient is in an inverse proportional relationship with the current change value; The adjustment coefficient contained in the target corresponding relationship is determined as the adjustment coefficient for the preset control valve.

5. The method of claim 1, wherein, The target opening degree of the preset control valve is determined based on the overheat adjustment value and the adjustment coefficient, comprising: A first proportional factor and a first integral factor are determined from a preset corresponding relationship between overheat adjustment values and adjustment parameters according to the overheat adjustment value; wherein, the adjustment parameters comprise proportional factors and integral factors; The vehicle type of the vehicle is obtained, and the initial opening degree of the preset control valve is determined 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 degree are calculated to obtain a first opening degree of the preset control valve; According to the adjustment coefficient, the first opening degree is adjusted to obtain a target opening degree of the preset control valve.

6. The method of claim 5, wherein, The adjustment of the first opening degree according to the adjustment coefficient to obtain the target opening degree of the preset control valve comprises: The first opening degree is multiplied by the adjustment coefficient to obtain the target opening degree of the preset control valve.

7. The method of claim 1, wherein, The method further comprises: In a case where it is determined that the superheat adjustment value is not within a preset range and / or it is determined that the heat dissipation 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 preset correspondence between superheat adjustment values and adjustment parameters according to the superheat adjustment value; wherein the adjustment parameters comprise proportional factors and integral factors; A vehicle type of the vehicle is obtained, and an initial opening degree of the preset control valve is determined 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 degree are calculated to obtain a second opening degree of the preset control valve; The preset control valve is controlled to open at the second opening degree to dissipate heat from the power supply module.

8. A heat dissipation device for a vehicle's power supply module, characterized in that, A battery cooling system applied to a vehicle, the battery cooling system controls the flow of refrigerant for dissipating heat from a power supply module in the vehicle by controlling the opening degree of a preset control valve, and the device comprises: An obtaining module is configured to obtain a superheat adjustment value corresponding to a superheat adjustment range of the power supply module and a current change value of the power supply module during operation of the vehicle; A determining module is configured to determine an adjustment coefficient for the preset control valve according to the current change value in a case where it is determined that the superheat adjustment value is within a preset range and the heat dissipation rate of the power supply module meets a preset condition based on the current change value; A heat dissipation module is configured to determine a target opening degree of the preset control valve based on the superheat adjustment value and the adjustment coefficient, and control the preset control valve to open at the target opening degree to dissipate heat from the power supply module.

9. A vehicle characterized by comprising: Comprise: A power supply module and a battery cooling system; The battery cooling system dissipates heat from the power supply module; The battery cooling system comprises a processor and a memory, and the processor is configured to execute a vehicle charging program stored in the memory to implement the method for dissipating heat from the power supply module of the vehicle according to any one of claims 1-7.

10. A storage medium, characterized by 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 method for dissipating heat from the power supply module of the vehicle according to any one of claims 1-7.

Images