Electronic expansion valve opening degree adjusting method, device, equipment and vehicle

Abstract

The application provides an electronic expansion valve opening degree adjusting method, device, equipment and vehicle. The application determines the refrigeration level of the cab based on the temperature in the vehicle, determines the refrigeration level of the battery based on the battery cell temperature, and determines the target superheat degree of the cab side and the target superheat degree of the battery side based on the refrigeration level of the cab and the refrigeration level of the battery, so as to actively adjust the target superheat degree of the cab side and the target superheat degree of the battery side based on the temperature in the vehicle and the battery cell temperature. Then, the opening degree of the first electronic expansion valve is adjusted based on the target superheat degree of the cab side, and the opening degree of the second electronic expansion valve is adjusted based on the target superheat degree of the battery side, so as to reasonably distribute the refrigeration capacity or the refrigerant flow of the cab side refrigeration and the battery side refrigeration, and ensure the refrigeration effect of the cab and the refrigeration effect of the battery.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of air conditioning, in particular to an electronic expansion valve opening degree adjusting method, device, equipment and vehicle. BACKGROUND

[0002] In the prior art, when the thermal management air conditioning system is in a dual refrigeration mode of a cab and a battery, the cab side refrigeration is controlled by an electromagnetic control valve and a thermal expansion valve, and the battery side refrigeration is controlled by an electronic expansion valve, which can cause the valve opening degree of the cab side to be uncontrollable. In addition, the opening degree of the electronic expansion valve is usually controlled by an opening degree lookup table method or a target superheat degree algorithm, which is passive adjustment and cannot reasonably distribute the refrigeration capacity of the cab side refrigeration and the battery side refrigeration. SUMMARY

[0003] Based on the defects and deficiencies of the prior art, the present application provides an electronic expansion valve opening degree adjusting method, device, equipment and vehicle, which can determine the cab side target superheat degree and the battery side target superheat degree based on the refrigeration level of the cab and the refrigeration level of the battery, and adjust the opening degree of the first electronic expansion valve and the opening degree of the second electronic expansion valve based on the cab side target superheat degree and the battery side target superheat degree, so as to solve the problem of uncontrollable valve opening degree of the cab side or passive adjustment, which causes unreasonable distribution of the refrigeration capacity of the cab side refrigeration and the battery side refrigeration.

[0004] According to a first aspect of an embodiment of the present application, an electronic expansion valve opening degree adjusting method is provided, which is applied to a thermal management air conditioning system in a dual refrigeration mode of a cab and a battery, the thermal management air conditioning system is provided with a first electronic expansion valve and a second electronic expansion valve, the first electronic expansion valve is used to adjust the flow of refrigerant in cab refrigeration, and the second electronic expansion valve is used to adjust the flow of refrigerant in battery refrigeration, and the method comprises:

[0005] determining the refrigeration level of the cab based on the temperature in the vehicle, and determining the refrigeration level of the battery based on the battery cell temperature;

[0006] determining the cab side target superheat degree and the battery side target superheat degree based on the refrigeration level of the cab and the refrigeration level of the battery;

[0007] adjusting the opening degree of the first electronic expansion valve based on the cab side target superheat degree, and adjusting the opening degree of the second electronic expansion valve based on the battery side target superheat degree.

[0008] According to a second aspect of the embodiments of the present application, an electronic expansion valve opening degree adjusting device is provided, which is applied to a thermal management air conditioning system in a dual refrigeration mode of a cab and a battery, the thermal management air conditioning system is provided with a first electronic expansion valve and a second electronic expansion valve, the first electronic expansion valve is used to adjust the flow of refrigerant in cab refrigeration, and the second electronic expansion valve is used to adjust the flow of refrigerant for battery refrigeration, and the device comprises:

[0009] A determination module is configured to determine a refrigeration level of the cab based on an indoor temperature, and determine a refrigeration level of the battery based on a battery cell temperature;

[0010] A first adjusting module is configured to adjust a target superheat degree of the cab side and a target superheat degree of the battery side based on the refrigeration level of the cab and the refrigeration level of the battery;

[0011] A second adjusting module is configured to adjust the opening degree of the first electronic expansion valve based on the target superheat degree of the cab side, and adjust the opening degree of the second electronic expansion valve based on the target superheat degree of the battery side.

[0012] According to a third aspect of the embodiments of the present application, an electronic device is provided, comprising a memory and a processor;

[0013] The memory is connected with the processor, and is configured to store a program;

[0014] The processor is configured to realize the electronic expansion valve opening degree adjusting method according to the first aspect by running the program in the memory.

[0015] According to a fourth aspect of the embodiments of the present application, a storage medium is provided, and the storage medium stores a computer program, and the computer program is run by a processor to realize the electronic expansion valve opening degree adjusting method according to the first aspect.

[0016] According to a fifth aspect of the embodiments of the present application, a vehicle is provided, and the vehicle is provided with the electronic expansion valve opening degree adjusting device according to the second aspect, or the electronic device according to the third aspect.

[0017] In the electronic expansion valve opening degree adjusting method, device, equipment and vehicle, the refrigeration level of the cab can be determined based on the temperature in the vehicle, the refrigeration level of the battery can be determined based on the battery cell temperature, and the target superheat degree of the cab side and the target superheat degree of the battery side can be determined based on the refrigeration level of the cab and the refrigeration level of the battery, so that the target superheat degree of the cab side and the target superheat degree of the battery side are actively adjusted based on the temperature in the vehicle and the battery cell temperature. Then, the opening degree of the first electronic expansion valve is adjusted based on the target superheat degree of the cab side, and the opening degree of the second electronic expansion valve is adjusted based on the target superheat degree of the battery side, so that the refrigeration amount or refrigerant flow of the cab side refrigeration and the battery side refrigeration is reasonably distributed, and the refrigeration effect of the cab and the refrigeration effect of the battery are ensured. BRIEF DESCRIPTION OF DRAWINGS

[0018] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the drawings needed in the embodiments or prior art description will be briefly introduced below. Obviously, the drawings in the following description are only embodiments of the present application, and other drawings can be obtained by those skilled in the art without creative labor on the basis of the provided drawings.

[0019] FIG. 1 A schematic diagram of a feasible application scenario of an electronic expansion valve opening degree adjusting method given by an embodiment of the present application is shown.

[0020] FIG. 2 A schematic diagram of the flow of an electronic expansion valve opening degree adjusting method given by an embodiment of the present application is shown.

[0021] FIG. 3 A flowchart of a cab refrigeration and battery refrigeration priority control given by an embodiment of the present application is shown.

[0022] FIG. 4 A flowchart of adjusting the target superheat degree of the cab side given by an embodiment of the present application is shown.

[0023] FIG. 5 A flowchart of adjusting the target superheat degree of the battery side given by an embodiment of the present application is shown.

[0024] FIG. 6 A schematic diagram of an electronic expansion valve adjusting flow given by an embodiment of the present application is shown.

[0025] FIG. 7 A structural schematic diagram of an electronic expansion valve opening degree adjusting device given by an embodiment of the present application is shown.

[0026] FIG. 8 A structural schematic diagram of an electronic device given by an embodiment of the present application is shown. DETAILED DESCRIPTION

[0027] The technical solutions in the embodiments of the present application will be described clearly and completely in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative work belong to the scope of protection of the present application.

[0028] SUMMARY

[0029] As described in the background, when the thermal management air conditioning system is in the dual refrigeration mode of the cab and the battery, controlling the cab side refrigeration through the electromagnetic control valve and the thermal expansion valve and controlling the battery side refrigeration through the electronic expansion valve will cause the valve opening of the cab side to be uncontrollable. In addition, the opening of the electronic expansion valve is usually controlled by using the opening lookup table method or the target superheat algorithm, which is passive adjustment and cannot reasonably distribute the refrigeration capacity of the cab side refrigeration and the battery side refrigeration in the system.

[0030] On this basis, the inventors have further found that by determining the refrigeration level of the cab based on the temperature in the vehicle, determining the refrigeration level of the battery based on the battery cell temperature, and determining the target superheat of the cab side and the target superheat of the battery side based on the refrigeration level of the cab and the refrigeration level of the battery, active adjustment of the target superheat of the cab side and the target superheat of the battery side based on the temperature in the vehicle and the battery cell temperature is realized, and then the opening of the first electronic expansion valve is adjusted based on the target superheat of the cab side, and the opening of the second electronic expansion valve is adjusted based on the target superheat of the battery side, so as to realize reasonable distribution of the refrigeration capacity or refrigerant flow of the cab side refrigeration and the battery side refrigeration, and ensure the refrigeration effect of the cab and the refrigeration effect of the battery.

[0031] Based on the above idea, the electronic expansion valve opening adjustment method provided in the embodiments of the present application is described below in conjunction with the drawings.

[0032] Exemplary scenarios

[0033] As FIG. 1 shown, the thermal management air conditioning system includes a compressor 110, a condenser 120, a first electronic expansion valve 130, and an evaporator 140.

[0034] When the cab needs to be cooled, the first electronic expansion valve 130 is opened, the compressor 110 sucks in low-temperature and low-pressure gaseous refrigerant, i.e. coolant, and makes it into high-temperature and high-pressure gaseous refrigerant through compression, and sends it into the condenser 120 along the pipeline, the compressor 110 drives the refrigerant to circulate in the system and provides power for the refrigeration cycle, the condenser 120 dissipates the high-temperature and high-pressure refrigerant vapor discharged by the compressor 110 to the atmosphere through the radiator 450, so that it condenses into liquid refrigerant, the liquid refrigerant continues to pass through the first electronic expansion valve 130 to the evaporator 140, the evaporator 140 converts the low-temperature and low-pressure liquid refrigerant into low-temperature and low-pressure gaseous refrigerant to provide a refrigeration effect for the cab, and the gaseous refrigerant continues to return to the compressor 110 along the pipeline, so as to circulate to reduce the temperature of the cab.

[0035] As shown in FIG. 1 , the thermal management air conditioning system further includes a second electronic expansion valve 210, a heat exchanger 220, and a second water pump 230.

[0036] When the battery needs to be cooled, the second electronic expansion valve 210 is opened, and when the coolant flows through the heat exchanger 220, it exchanges heat with the cooling water in the heat exchanger 220, and the second water pump 230 is started to circulate water, so as to reduce the temperature of the battery.

[0037] As shown in FIG. 1 , the thermal management air conditioning system further includes a PTC heater 310, a heating module 320, a first water pump 330, and a first water tank 340.

[0038] Among them, the heating module 320 and the evaporator 140 are arranged in the air conditioning box.

[0039] When the cab needs to be heated, the power of the PTC heater 310 is adjusted to adjust the water temperature, so that the water temperature increases, and the first water pump 330 is started to circulate water, so that the water in the first water tank 340 flows through the first water pump 330 and the PTC heater 310 to the heating module 320, the heating module 320 uses the cooling circulating water as a heat source, and transmits heat energy to the cab through the air conditioning system to heat the cab.

[0040] As shown in FIG. 1 , the thermal management air conditioning system further includes a second water tank 240.

[0041] When the battery needs to be heated, the second electronic expansion valve 210 is disconnected, the coolant flowing through the heat exchanger 220 does not exchange heat with the cooling water in the heat exchanger 220, the second water pump 230 is started to circulate water, so that the water in the second water tank 240 flows through the second water pump 230 to the battery tank assembly 250, and then returns to the second water tank 240, so as to circulate back and forth, so that the battery is uniformly heated.

[0042] AsFIG. 1 As shown, the thermal management air conditioning system further comprises a motor group 410, a third water tank 420, a third water pump 430, a controller 440, and a radiator 450 arranged in parallel with the third water tank 420.

[0043] The motor group 410 comprises a chassis drive motor, an upper drive motor, and an upper drive motor driver, and the controller 440 can be an all-in-one controller.

[0044] When the motor group 410 and the controller 440 generate more heat as the working time increases, the fan 460 on the radiator 450 draws in air and accelerates its flow, so that the cooling liquid flowing through the radiator 450 is cooled more quickly, thereby reducing the temperature of the third water tank 420. By turning on the third water pump 430, the circulation of cooling water is promoted to reduce the temperature of the cooling water in the entire pipeline. In this way, the heat dissipation of the motor group 410 and the controller 440 is achieved, and at the same time, the condenser 120 is cooled by the fan 460.

[0045] It can be understood that the working modes of the thermal management air conditioning system include single cab refrigeration mode, single battery refrigeration mode, cab and battery dual refrigeration mode, cab heating and battery refrigeration mode, refrigeration defogging mode, heating defogging mode, etc.

[0046] Specifically, the flow direction of the refrigerant or cooling water in each pipeline of the thermal management air conditioning system can be as shown by the arrows. FIG. 1

[0047] The thermal management air conditioning system further comprises a cab temperature sensor (i.e., an in-vehicle temperature sensor, not shown in FIG. 1 ), a battery cell temperature sensor (not shown in FIG. 1 ), a heat exchanger outlet temperature sensor 510 (i.e., T2), an evaporator outlet temperature sensor 520 (i.e., T4), an evaporator surface temperature sensor 530 (i.e., T3), a low-pressure PT sensor 540 (i.e., PT), a compressor outlet (exhaust) temperature sensor 550 (i.e., T1), a condenser outlet pressure sensor 560 (i.e., PH), a battery inlet water temperature sensor 570 (i.e., T5), and a battery outlet water temperature sensor 580 (i.e., T6).

[0048] The low-pressure PT sensor 540 can measure the low-pressure pressure of the refrigerant at its location, and the low-pressure pressure has a corresponding relationship with the evaporation saturation temperature of the refrigerant.

[0049] Exemplary methods

[0050] Please refer to FIG. 2 In an exemplary embodiment, an electronic expansion valve opening degree adjusting method is provided, which is applied to an air conditioning system as shown in FIG. 1 ​In the heat management air conditioning system shown, the heat management air conditioning system is in a dual refrigeration mode of the cab and the battery, the heat management air conditioning system is provided with a first electronic expansion valve and a second electronic expansion valve, the first electronic expansion valve is used to adjust the flow of refrigerant in the cab refrigeration, and the second electronic expansion valve is used to adjust the flow of refrigerant in the battery refrigeration.

[0051] As shown in the figure, the electronic expansion valve opening degree adjusting method includes steps S201-S203: FIG. 2

[0052] S201: Determine the refrigeration level of the cab based on the temperature in the vehicle, and determine the refrigeration level of the battery based on the battery cell temperature.

[0053] Wherein, the temperature in the vehicle is detected by the above-mentioned vehicle temperature sensor, generally, the temperature in the vehicle is the real-time temperature.

[0054] The refrigeration level of the cab can be used to represent the importance of the cab refrigeration, the higher the refrigeration level of the cab, the higher the importance of the cab refrigeration, and the higher the gear / stronger the intensity of the cab refrigeration.

[0055] Because the higher the temperature in the vehicle, the more the need for refrigeration of the cab, the higher the importance of the cab refrigeration. Therefore, the higher the temperature in the vehicle, the higher the refrigeration level of the cab.

[0056] Specifically, the refrigeration level of the cab can be divided into at least two levels based on actual needs. In the embodiments of the present application, taking the refrigeration level of the cab divided into two levels as an example, the scheme is introduced. Among them, the two levels are level 1 and level 2.

[0057] If the temperature in the vehicle is less than or equal to the preset temperature in the vehicle, the refrigeration level of the cab is determined to be level 1; if the temperature in the vehicle is greater than the preset temperature in the vehicle, the refrigeration level of the cab is determined to be level 2.

[0058] In addition, the battery cell temperature is detected by the above-mentioned battery cell temperature sensor, generally, the battery cell temperature is the real-time temperature.

[0059] The refrigeration level of the battery can be used to represent the importance of the battery refrigeration, the higher the refrigeration level of the battery, the higher the importance of the battery refrigeration, and the higher the gear / stronger the intensity of the battery refrigeration.

[0060] Because the higher the battery cell temperature, the more the need for refrigeration of the battery, the higher the importance of the battery refrigeration. Therefore, the higher the battery cell temperature, the higher the refrigeration level of the battery.

[0061] ​Specifically, the refrigeration level of the battery can be divided into at least two levels based on actual needs. In the embodiments of the present application, the refrigeration level of the battery is divided into two levels as an example, and the scheme is introduced. Among them, the two priorities are level 1 and level 2.

[0062] If the battery cell temperature is less than or equal to the preset cell temperature, the refrigeration level of the battery is determined to be level 1; if the battery cell temperature is greater than the preset cell temperature, the refrigeration level of the battery is determined to be level 2.

[0063] S202: Based on the refrigeration level of the cab and the refrigeration level of the battery, adjust the cab side target superheat and the battery side target superheat.

[0064] Because the higher the refrigeration level of the cab, the more refrigerant is needed to cool the cab to ensure the refrigeration effect of the cab, the flow rate of the refrigerant used for the cab cooling is related to the opening size of the first electronic expansion valve, and the opening of the first electronic expansion valve is determined by the cab side target superheat and the cab side actual superheat. Similarly, the higher the refrigeration level of the battery, the more refrigerant is needed to cool the battery to ensure the refrigeration effect of the battery, and the flow rate of the refrigerant used for the battery cooling is related to the opening size of the second electronic expansion valve, and the opening of the second electronic expansion valve is determined by the battery side target superheat and the battery side actual superheat.

[0065] Therefore, in order to ensure the refrigeration effect of the cab and the refrigeration effect of the battery, the cab side target superheat and the battery side target superheat can be adjusted based on the refrigeration level of the cab and the refrigeration level of the battery, and then the opening of the first and second electronic expansion valves can be adjusted based on the cab side target superheat and the battery side target superheat.

[0066] Specifically, the cab side target superheat can be adjusted based on the refrigeration level of the cab.

[0067] More specifically, when adjusting the cab side target superheat based on the refrigeration level of the cab, the cab side target superheat can be adjusted to the cab side target superheat corresponding to the refrigeration level of the cab based on the corresponding relationship between the refrigeration level of the cab and the cab side target superheat. Generally, the higher the refrigeration level of the cab, the lower the corresponding cab side target superheat.

[0068] For example, when the refrigeration level of the cab is level 1, the cab side target superheat is adjusted to the cab side target superheat corresponding to the level 1, which is △T1, and when the refrigeration level of the cab is level 2, the cab side target superheat is adjusted to the cab side target superheat corresponding to the level 2, which is △T2. Among them, the refrigeration intensity of level 1 is lower than that of level 2, so △T1>△T2.

[0069] Similarly, the battery-side target superheat can be adjusted based on the battery's cooling level.

[0070] More specifically, when adjusting the battery-side target superheat based on the battery's cooling level, the battery-side target superheat can be adjusted to a battery-side target superheat corresponding to the battery's cooling level based on a correspondence between the battery's cooling level and the battery-side target superheat. Generally, the higher the battery's cooling level, the lower the corresponding battery-side target superheat.

[0071] S203: Adjust the opening degree of the first electronic expansion valve based on the cab-side target superheat, and adjust the opening degree of the second electronic expansion valve based on the battery-side target superheat.

[0072] Based on the cab-side target superheat and the battery-side target superheat, the required opening degree of the first electronic expansion valve and the required opening degree of the second electronic expansion valve are determined by lookup table method or adaptive adjustment algorithm, and then the opening degree of the first electronic expansion valve is set based on the required opening degree of the first electronic expansion valve, and the opening degree of the second electronic expansion valve is set based on the required opening degree of the second electronic expansion valve.

[0073] Specifically, first, the difference between the cab-side target superheat and the cab-side actual superheat is determined, and then the opening degree of the first electronic expansion valve corresponding to the difference is determined as the required opening degree of the first electronic expansion valve. Alternatively, first, the difference between the cab-side target superheat and the cab-side actual superheat is determined, and then the opening degree of the first electronic expansion valve is adjusted based on the difference to obtain the required opening degree of the first electronic expansion valve. The adjustment method can be PID adjustment or PI adjustment, etc.

[0074] In this way, by setting the opening degree of the first electronic expansion valve based on the required opening degree of the first electronic expansion valve, the difference between the cab-side target superheat and the cab-side actual superheat can be effectively eliminated, and the cab-side actual superheat can be adjusted to the cab-side target superheat, thereby ensuring the cab-side cooling effect.

[0075] Correspondingly, first, the difference between the battery-side target superheat and the battery-side actual superheat is determined, and then the opening degree of the second electronic expansion valve corresponding to the difference is determined as the required opening degree of the second electronic expansion valve. Alternatively, first, the difference between the battery-side target superheat and the battery-side actual superheat is determined, and then the opening degree of the second electronic expansion valve is adjusted based on the difference to obtain the required opening degree of the second electronic expansion valve. The adjustment method can be proportional integral derivative (PID) adjustment or proportional integral (PI) adjustment, etc.

[0076] Thus, by setting the opening degree of the second electronic expansion valve based on the required opening degree of the second electronic expansion valve, the difference between the battery-side target overheat degree and the battery-side actual overheat degree can be effectively eliminated, and the battery-side actual overheat degree can be adjusted to the battery-side target overheat degree, thereby ensuring the battery-side refrigeration effect.

[0077] When setting the opening degree of the first electronic expansion valve based on the required opening degree of the first electronic expansion valve, a control signal can be first generated based on the required opening degree of the first electronic expansion valve, and then the first electronic expansion valve is controlled to perform an action of adjusting its opening degree to the required opening degree of the first electronic expansion valve in response to the control signal. That is, the control signal is used to control the opening degree of the first electronic expansion valve to be the required opening degree of the first electronic expansion valve.

[0078] Similarly, when setting the opening degree of the second electronic expansion valve based on the required opening degree of the second electronic expansion valve, a control signal can be first generated based on the required opening degree of the second electronic expansion valve, and then the second electronic expansion valve is controlled to perform an action of adjusting its opening degree to the required opening degree of the second electronic expansion valve in response to the control signal. That is, the control signal is used to control the opening degree of the second electronic expansion valve to be the required opening degree of the second electronic expansion valve.

[0079] The first electronic expansion valve can also feed back the actual opening degree after performing the action of adjusting the opening degree to the thermal management control system, so as to facilitate the next opening degree adjustment of the first electronic expansion valve. Correspondingly, the second electronic expansion valve can also feed back the actual opening degree after performing the action of adjusting the opening degree to the thermal management system, so as to facilitate the next opening degree adjustment of the second electronic expansion valve.

[0080] In the embodiment, by determining the refrigeration level of the cab based on the in-vehicle temperature, determining the refrigeration level of the battery based on the battery cell temperature, and determining the cab-side target overheat degree and the battery-side target overheat degree based on the refrigeration level of the cab and the refrigeration level of the battery, the cab-side target overheat degree and the battery-side target overheat degree are actively adjusted based on the in-vehicle temperature and the battery cell temperature, and then the opening degree of the first electronic expansion valve is adjusted based on the cab-side target overheat degree, and the opening degree of the second electronic expansion valve is adjusted based on the battery-side target overheat degree, so as to realize reasonable distribution of the refrigeration amount or refrigerant flow of the cab-side refrigeration and the battery-side refrigeration, and ensure the cab refrigeration effect and the battery refrigeration effect.

[0081] In order to reduce the influence of the fluctuation of the in-vehicle temperature on the determination of the refrigeration level of the cab, and ensure the stability and reliability of the determination of the refrigeration level of the cab, in some embodiments, when determining the refrigeration level of the cab based on the in-vehicle temperature, a buffer temperature range of the in-vehicle temperature, i.e., an in-vehicle buffer temperature range or an in-vehicle temperature hysteresis range, is set to determine the refrigeration level of the cab in combination with the change trend of the in-vehicle temperature.

[0082] The upper and lower limits of the in-vehicle buffer temperature range are preset in-vehicle temperatures, which are a first preset in-vehicle temperature and a second preset in-vehicle temperature, respectively, and the first preset in-vehicle temperature is lower than the second preset in-vehicle temperature.

[0083] In addition, the change trend of the in-vehicle temperature is that the in-vehicle temperature increases from less than or equal to the first preset in-vehicle temperature to the in-vehicle buffer temperature range, or the in-vehicle temperature decreases from greater than or equal to the second preset in-vehicle temperature to the in-vehicle buffer temperature range.

[0084] If the in-vehicle temperature is less than or equal to the first preset in-vehicle temperature, the cooling level of the cab is determined to be level 1; if the in-vehicle temperature is in the in-vehicle buffer temperature range, i.e., the in-vehicle temperature is greater than the first preset in-vehicle temperature and less than or equal to the second preset in-vehicle temperature, the cooling level of the cab is determined based on the change trend of the in-vehicle temperature; and if the in-vehicle temperature is greater than the second preset in-vehicle temperature, the cooling level of the cab is determined to be level 2.

[0085] Based on the change trend of the in-vehicle temperature, if the in-vehicle temperature increases from less than or equal to the first preset in-vehicle temperature to the in-vehicle buffer temperature range, the cooling level of the cab is determined to be level 1; and if the in-vehicle temperature decreases from greater than the second preset in-vehicle temperature to the in-vehicle buffer temperature range, the cooling level of the cab is determined to be level 2.

[0086] That is, if the in-vehicle temperature is less than or equal to the first preset in-vehicle temperature, the cooling level of the cab is determined to be level 1; if the in-vehicle temperature increases from less than or equal to the first preset in-vehicle temperature to greater than the first preset in-vehicle temperature and less than or equal to the second preset in-vehicle temperature, the cooling level of the cab is determined to be level 1; if the in-vehicle temperature decreases from greater than the second preset in-vehicle temperature to greater than the first preset in-vehicle temperature and less than or equal to the second preset in-vehicle temperature, the cooling level of the cab is determined to be level 2; and if the in-vehicle temperature is greater than the second preset in-vehicle temperature, the cooling level of the cab is determined to be level 2.

[0087] For example, the cooling level of the driver's cabin is divided into level 1 and level 2 according to the temperature in the vehicle. When the cooling level of the driver's cabin is determined based on the temperature in the vehicle Tc, if Tc≤30℃, state_cabin=1, which indicates that the cooling level of the driver's cabin is level 1; if Tc>32℃, state_cabin=2, which indicates that the cooling level of the driver's cabin is level 2; if 30℃<Tc≤32℃, state_cabin=unchanged, which indicates that the temperature in the vehicle is in a hysteresis interval. The first measured Tc satisfies 30℃<Tc≤32℃, unchanged is 2. Tc changes from Tc≤30℃ to 30℃<Tc≤32℃, unchanged is 1. Tc changes from Tc>32℃ to 30℃<Tc≤32℃, unchanged is 2.

[0088] In this embodiment, a hysteresis temperature interval of the temperature in the vehicle is set. When the temperature in the vehicle is less than or equal to a first preset temperature in the vehicle, i.e., the temperature in the vehicle is not higher than the lower limit of the hysteresis temperature interval, the cooling level of the driver's cabin is determined to be level 1. When the temperature in the vehicle increases from less than or equal to the first preset temperature in the vehicle to greater than the first preset temperature in the vehicle and less than or equal to a second preset temperature in the vehicle, the cooling level of the driver's cabin is determined to be level 1. When the temperature in the vehicle decreases from greater than the second preset temperature in the vehicle to greater than the first preset temperature in the vehicle and less than or equal to the second preset temperature in the vehicle, the cooling level of the driver's cabin is determined to be level 2, which is higher than level 1. When the temperature in the vehicle is greater than the second preset temperature in the vehicle, the cooling level of the driver's cabin is determined to be level 2. In this way, the cooling level of the driver's cabin can be determined based on whether the temperature in the vehicle is in the hysteresis temperature interval and whether the temperature in the vehicle was greater than the hysteresis temperature interval or less than the hysteresis temperature interval before that. This can effectively reduce the influence of fluctuations in the temperature in the vehicle on the cooling level of the driver's cabin and ensure the stability and reliability of the determined cooling level of the driver's cabin.

[0089] In some embodiments, if the indoor temperature cannot be detected, the surface temperature of the evaporator is used instead of the indoor temperature to determine the cooling level of the driver's cabin in the above manner.

[0090] To reduce the influence of fluctuations in the temperature of the battery cell on the determination of the cooling level of the battery and ensure the stability and reliability of the determined cooling level of the battery, in some embodiments, when the cooling level of the battery is determined based on the temperature of the battery cell, a hysteresis temperature interval of the temperature of the battery cell, i.e., a cell temperature hysteresis interval, is set. The cooling level of the battery is determined in combination with the change trend of the temperature of the battery cell.

[0091] The upper and lower limits of the battery cell buffering temperature range are preset battery cell temperatures, which are a first preset battery cell temperature and a second preset battery cell temperature, respectively, and the first preset battery cell temperature is lower than the second preset battery cell temperature.

[0092] The change trend of the battery cell temperature is that the battery cell temperature increases from less than or equal to the first preset battery cell temperature to the battery cell buffering temperature range, or the battery cell temperature decreases from greater than or equal to the second preset battery cell temperature to the battery cell buffering temperature range.

[0093] If the battery cell temperature is less than or equal to the first preset battery cell temperature, the cooling level of the battery is determined to be level 1; if the battery cell temperature is in the battery cell buffering temperature range, i.e., the battery cell temperature is greater than the first preset battery cell temperature and less than or equal to the second preset battery cell temperature, the cooling level of the battery is determined based on the change trend of the battery cell temperature; and if the battery cell temperature is greater than the second preset battery cell temperature, the cooling level of the battery is determined to be level 2.

[0094] If the change trend of the battery cell temperature is that the battery cell temperature increases from less than or equal to the first preset battery cell temperature to the battery cell buffering temperature range, the cooling level of the battery is determined to be level 1; and if the battery cell temperature decreases from greater than or equal to the second preset battery cell temperature to the battery cell buffering temperature range, the cooling level of the battery is determined to be level 2.

[0095] That is, if the battery cell temperature is less than or equal to the first preset battery cell temperature, the cooling level of the battery is determined to be level 1; if the battery cell temperature increases from less than or equal to the first preset battery cell temperature to the battery cell buffering temperature range, the cooling level of the battery is determined to be level 1; if the battery cell temperature decreases from greater than or equal to the second preset battery cell temperature to the battery cell buffering temperature range, the cooling level of the battery is determined to be level 2; and if the battery cell temperature is greater than the second preset battery cell temperature, the cooling level of the battery is determined to be level 2.

[0096] For example, the battery cooling level is divided into level 1 and level 2 according to the battery cell temperature. When the battery cooling level state_battery is determined based on the battery cell temperature Tb, if Tb≤45℃, state_battery=1, which indicates that the battery cooling level is level 1; if Tb>47℃, state_battery=2, which indicates that the battery cooling level is level 2; if 45℃<Tb≤47℃, state_battery=unchanged, which indicates a hysteresis interval. The first measured Tb satisfies 45℃<Tb≤47℃, unchanged is 1. Tb changes from Tb≤45℃ to 45℃<Tb≤47℃, unchanged is 1. Tb changes from Tb>47℃ to 45℃<Tb≤47℃, unchanged is 2.

[0097] In this embodiment, a cell buffer temperature interval of the battery cell temperature is set. When the battery cell temperature is less than or equal to a first preset cell temperature, i.e., the battery cell temperature is not higher than the lower limit of the cell buffer temperature interval, the battery cooling level is determined to be level 1. When the battery cell temperature increases from less than or equal to the first preset cell temperature to the cell buffer temperature interval, the battery cooling level is determined to be level 1. When the battery cell temperature decreases from greater than or equal to a second preset cell temperature to the cell buffer temperature interval, the battery cooling level is determined to be level 2, which is higher than level 1. When the battery cell temperature is greater than the second preset cell temperature, the battery cooling level is determined to be level 2. In this way, the battery cooling level can be determined based on whether the battery cell temperature is located in the cell buffer temperature interval and whether the battery cell temperature is greater than the maximum value of the in-vehicle buffer temperature interval or less than the minimum value of the in-vehicle buffer temperature interval before that. The influence of the fluctuation of the battery cell temperature on the battery cooling level can be effectively reduced, and the stability and reliability of the determined battery cooling level can be ensured.

[0098] In order to realize reasonable allocation of refrigerant flow in the cab cooling and battery cooling, in some embodiments, when the cab side target superheat and the battery side target superheat are determined based on the cooling level of the cab and the cooling level of the battery, the priority order of the cab cooling and the battery cooling is first determined based on the cooling level of the cab and the cooling level of the battery, and the cab side target superheat and the battery side target superheat are adjusted based on the priority order of the cab cooling and the battery cooling.

[0099] The priority order of the cab cooling and the battery cooling indicates the importance of the cab cooling relative to the battery cooling.

[0100] Specifically, in the priority order of the cabin refrigeration and the battery refrigeration, if the cabin refrigeration is prior to the battery refrigeration, that is, the cabin refrigeration is prior to the battery refrigeration, the priority order represents that the importance of the cabin refrigeration is higher than the importance of the battery refrigeration, if the cabin refrigeration is after the battery refrigeration, that is, the battery refrigeration is prior to the cabin refrigeration, the priority order represents that the importance of the cabin refrigeration is lower than the importance of the battery refrigeration.

[0101] In the adjustment of the cabin side target superheat degree and the battery side target superheat degree based on the priority order of the cabin refrigeration and the battery refrigeration, generally, if the cabin refrigeration is prior to the battery refrigeration, the cabin side target superheat degree is lower than the battery side target superheat degree; if the battery refrigeration is prior to the cabin refrigeration, the cabin side target superheat degree is higher than the battery side target superheat degree.

[0102] When the thermal management air conditioning system is in the working state, the battery safety needs to be ensured first, on this basis, the human body tolerance cannot be exceeded, on the basis of meeting the battery safety and the human body tolerance, the battery working performance and the human body comfort can be further considered to ensure the working performance of the thermal management air conditioning system. When the thermal management air conditioning system works in the double refrigeration mode, the refrigeration level of the cabin is 1, the human body comfort demand can be met, the refrigeration level of the battery is 1, the battery working performance can be ensured, the refrigeration level of the cabin is 2, the human body tolerance demand can be met, and the refrigeration level of the battery is 2, the battery safety demand can be met.

[0103] Therefore, based on the refrigeration level of the cabin and the refrigeration level of the battery, when judging the priority order between the cabin refrigeration and the battery refrigeration, the priority of state_cabin=1 and the priority of state_battery=1 can be the same, the priority of state_cabin=1 and the priority of state_battery=1 are lower than the priority of state_cabin=2, and the priority of state_cabin=2 is lower than the priority of state_battery=2.

[0104] Specifically, if the refrigeration level of the cab and the refrigeration level of the battery are both level 1, it is determined that the priorities of the cab refrigeration and the battery refrigeration are the same; if the refrigeration level of the cab and the refrigeration level of the battery are both level 2, or the refrigeration level of the cab is level 1 and the refrigeration level of the battery is level 2, it is determined that the priority order between the cab refrigeration and the battery refrigeration is that the battery refrigeration is prior to the cab refrigeration, that is, the priority of the battery refrigeration is higher than that of the cab refrigeration; if the refrigeration level of the cab is level 2 and the refrigeration level of the battery is level 1, it is determined that the priority order between the cab refrigeration and the battery refrigeration is that the cab refrigeration is prior to the battery refrigeration, that is, the priority of the cab refrigeration is higher than that of the battery refrigeration.

[0105] Specifically, based on the priority order between the cab refrigeration and the battery refrigeration, when adjusting the cab side target superheat degree and the battery side target superheat degree, if the priorities of the cab refrigeration and the battery refrigeration are the same, the cab side target superheat degree is adjusted based on the indoor temperature and the air conditioning panel setting temperature, and the battery side target superheat degree is adjusted based on the vehicle working condition; if the priority of the cab refrigeration is higher than that of the battery refrigeration, or the priority of the cab refrigeration is lower than that of the battery refrigeration, the cab side target superheat degree and the battery side target superheat degree are adjusted in a preset value assignment manner.

[0106] When the cab side target superheat degree and the battery side target superheat degree are adjusted in the preset value assignment manner, if the priority of the battery refrigeration is higher than that of the cab refrigeration, the first preset cab side superheat degree is determined as the cab side target superheat degree, and the first preset battery side superheat degree is determined as the battery side target superheat degree, the first preset cab side superheat degree being greater than the first preset battery side superheat degree; if the priority of the cab refrigeration is higher than that of the battery refrigeration, the second preset cab side superheat degree is determined as the cab side target superheat degree, and the second preset battery side superheat degree is determined as the battery side target superheat degree, the second preset cab side superheat degree being less than the second preset battery side superheat degree.

[0107] For example, the first preset cab side superheat degree is 25℃, and the first preset battery side superheat degree is 5℃. The second preset cab side superheat degree is 6℃, and the second preset battery side superheat degree is 28℃.

[0108] That is, when the priorities of the cab refrigeration and the battery refrigeration are the same, no intervention is made to the determination of the cab side target superheat degree and the battery side target superheat degree, and the cab side target superheat degree and the battery side target superheat degree are directly determined based on the related temperature parameters and the working condition; when the cab refrigeration is prior to the battery refrigeration or the battery refrigeration is prior to the cab refrigeration, the cab side target superheat degree and the battery side target superheat degree are directly assigned to control the values of the cab side target superheat degree and the battery side target superheat degree.

[0109] Exemplarily, the flow of determining the priority order of the cabin refrigeration and the battery refrigeration, or the flow of the priority control of the cabin refrigeration and the battery refrigeration, can be as shown in the following table. FIG. 3 In the table, the refrigeration level of the cabin is determined to be level 1 or level 2 based on the actual temperature in the cabin (i.e., the above-mentioned vehicle temperature), and the refrigeration level of the battery is determined to be level 1 or level 2 based on the (maximum) temperature of the battery cell. If the refrigeration level of the cabin and the refrigeration level of the battery are both level 1, it is determined that the refrigeration state of the thermal management air conditioning system is state 1, in which no intervention is made, i.e., no priority of the cabin refrigeration and the battery refrigeration is set. If the refrigeration level of the cabin is level 2 and the refrigeration level of the battery is level 1, it is determined that the refrigeration state of the thermal management air conditioning system is state 2, in which the cabin refrigeration is prioritized, i.e., the priority of the cabin refrigeration is set to be higher than that of the battery refrigeration. If the refrigeration level of the cabin is level 1 and the refrigeration level of the battery is level 2, it is determined that the refrigeration state of the thermal management air conditioning system is state 3, in which the battery refrigeration is prioritized, i.e., the priority of the battery refrigeration is set to be higher than that of the cabin refrigeration. If the refrigeration level of the cabin and the refrigeration level of the battery are both level 2, it is determined that the refrigeration state of the thermal management air conditioning system is state 4, in which the battery refrigeration is prioritized, i.e., the priority of the battery refrigeration is set to be higher than that of the cabin refrigeration.

[0110] That is, when adjusting the cabin side target superheat and the battery side target superheat based on the refrigeration level of the cabin and the refrigeration level of the battery, if the refrigeration level of the cabin and the refrigeration level of the battery are both level 1, the cabin side target superheat is adjusted based on the vehicle temperature and the air conditioning panel set temperature, and the battery side target superheat is adjusted based on the vehicle operating condition. If the refrigeration level of the cabin and the refrigeration level of the battery are both level 2, or the refrigeration level of the cabin is level 1 and the refrigeration level of the battery is level 2, the first preset cabin side superheat is determined as the cabin side target superheat, and the first preset battery side superheat is determined as the battery side target superheat, the first preset cabin side superheat being greater than the first preset battery side superheat. If the refrigeration level of the cabin is level 2 and the refrigeration level of the battery is level 1, the second preset cabin side superheat is determined as the cabin side target superheat, and the second preset battery side superheat is determined as the battery side target superheat, the second preset cabin side superheat being less than the second preset battery side superheat.

[0111] Thus, based on the refrigeration levels of the cab and the battery, the target overheat degrees of the cab side and the battery side are determined based on the relevant temperature parameters and working conditions, or the target overheat degrees of the cab side and the battery side are directly assigned, so that the target overheat degrees of the cab side and the battery side can be adjusted based on the actual working conditions, and the reasonable distribution of the refrigerant flow in the cab refrigeration and the battery refrigeration is ensured.

[0112] To ensure the refrigeration effect of the cab, in some embodiments, when the target overheat degree of the cab side is determined based on the indoor temperature and the air conditioning panel setting temperature, a first difference, i.e., the difference between the indoor temperature and the air conditioning panel setting temperature, is first determined, and then the target overheat degree of the cab side is adjusted based on the first difference.

[0113] When the target overheat degree of the cab side is adjusted, the adjusted target overheat degree of the cab side is the initial target overheat degree of the cab side or the target overheat degree of the cab side after the last adjustment.

[0114] Specifically, based on the first difference, the target overheat degree of the cab side is determined as the cab overheat degree corresponding to the value of the first difference.

[0115] For example, the process of adjusting the target overheat degree of the cab side based on the first difference can be as shown in FIG. 4 The target overheat degree of the cab side is a variable value that changes within a preset target overheat degree range of the cab side, and the change can be divided into four cases, wherein the preset target overheat degree range of the cab side is [5℃, 8℃]:

[0116] Case 1: When the difference between the actual indoor temperature (i.e., the above-mentioned indoor temperature) and the air conditioning panel setting temperature, i.e., the first difference dT, is ≤0℃, the target overheat degree of the cab side is set to the maximum value in the preset target overheat degree range of the cab side, i.e., 8℃.

[0117] Case 2: When 0℃< dT≤5℃, the target overheat degree of the cab side is set to 7℃.

[0118] Case 3: When 5℃< dT≤10℃, the target overheat degree of the cab side is set to 6℃.

[0119] Case 4: When dT>10℃, the target overheat degree of the cab side is set to 5℃.

[0120] In the embodiment, the cab side overheat degree is adjusted based on a first difference value between the temperature in the vehicle and the temperature set by the air conditioning panel, to obtain the cab side target overheat degree, so that active and reasonable adjustment of the cab side target overheat degree is realized, and in the case of adjusting the opening degree of the first electronic expansion valve based on the cab side target overheat degree, reasonable refrigerant flow is provided for the cab side, and the cab refrigeration effect is ensured.

[0121] In some embodiments, the adjustment method when adjusting the cab side overheat degree can be PID adjustment or PI adjustment, etc.

[0122] Since the working state of the battery is different in the driving or charging working condition, in order to ensure the battery refrigeration effect, when adjusting the battery side target overheat degree based on the vehicle working condition, it is determined whether the vehicle working condition is the driving working condition or the charging working condition, to determine the battery side target overheat degree.

[0123] If the vehicle working condition is the driving working condition, the battery side target overheat degree is determined based on the evaporator surface temperature; if the vehicle working condition is the charging working condition, the battery side target overheat degree is determined based on the battery water inlet temperature.

[0124] Specifically, when the battery side target overheat degree is determined based on the evaporator surface temperature, the evaporator target surface temperature is taken as the target, and the battery side overheat degree is adjusted based on the difference between the evaporator surface temperature and the evaporator target surface temperature by table lookup or self-adaptive algorithm adjustment to obtain the battery side target overheat degree. Exemplarily, the adjustment range of the adjusted battery side overheat degree is [15℃, 30℃], and accordingly, the value range of the battery side target overheat degree is [15℃, 30℃].

[0125] When the evaporator surface temperature deviates from the evaporator target surface temperature, that is, the difference between the evaporator surface temperature and the evaporator target surface temperature increases, the battery side target overheat degree increases; when the evaporator surface temperature approaches the evaporator target surface temperature, that is, the difference between the evaporator surface temperature and the evaporator target surface temperature decreases, the battery side target overheat degree decreases.

[0126] Specifically, when the battery side target temperature is determined based on the battery water inlet temperature, a second difference value, that is, the difference between the battery water inlet temperature and the preset battery water inlet temperature, is first determined, and then the battery side overheat degree is adjusted based on the second difference value to obtain the battery side target overheat degree.

[0127] The greater the second difference value, the smaller the battery side target overheat degree, and the smaller the second difference value, the greater the battery side target overheat degree.

[0128] Exemplarily, the flow of adjusting the battery side target overheat degree can be as shown in FIG. 5 The battery side target overheat degree is a variable value, and the adjustment of the battery side target overheat degree can be divided into two cases:

[0129] Case 1, in driving condition, taking the target surface temperature of the evaporator in the cab as the target, the battery side overheat degree is adjusted by table lookup or adaptive algorithm, the adjustment range is [15℃, 30℃], the driving-battery side target overheat degree is obtained, that is, the battery side target overheat degree in driving condition. For example, when the evaporator surface temperature deviates from the target surface temperature, the battery side overheat degree increases, when the evaporator surface temperature approaches the target surface temperature, the battery overheat degree decreases.

[0130] Case 2, in charging condition, the battery side target overheat degree is adjusted according to the difference between the actual battery (pack) water inlet temperature (i.e. the above-mentioned battery water inlet temperature) and the target battery water inlet temperature, that is, the second difference dT=T1-T2. Wherein, dT represents the difference between the battery (actual) water inlet temperature and the target battery water inlet temperature, T1 represents the battery water inlet temperature, T2 represents the target battery water inlet temperature, the smaller dT is, the larger the battery side target overheat degree is, the larger dT is, the smaller the battery side target overheat degree is. In addition, the (adjustment) range of the battery side target overheat degree is defined as [Ovt min , Ovt max ], Ovt max represents the maximum value of the adjustment range of the battery side target overheat degree, Ovt min represents the minimum value of the adjustment range of the battery side target overheat degree, for example [15℃, 25℃]; the range of dT is defined as [dT min , dT max ], dT max represents the maximum value of dT, dT min represents the minimum value of dT, Ovt min represents the minimum value of the adjustment range of the battery side target overheat degree, for example [0℃, 15℃]; the target battery water inlet temperature is a constant value, for example 15℃. The charging-battery side target overheat degree, that is, the battery side target overheat degree in charging condition, is calculated according to Ovt=[(Ovt max -Ovt min ) / (dT max -dT min )]*(dT-dT min )+Ovt min , Ovt represents the charging-battery side target overheat degree.

[0131] In this way, based on different conditions, in driving condition, the battery side target overheat degree can be determined based on the evaporator surface temperature, in charging condition, the battery side target overheat degree can be determined based on the battery water inlet temperature, so as to realize the targeted adjustment of the battery side target overheat degree for different conditions, thereby effectively ensuring the battery refrigeration effect under different conditions.

[0132] Exemplarily, the adjustment process of the first electronic expansion valve and the second electronic expansion valve can be as shown in FIG. 6 When the opening degree of the first electronic expansion valve for the cab is adjusted, the initial target superheat degree for the cab side is determined based on the difference range between the actual indoor temperature and the air conditioning panel set temperature; when the opening degree of the second electronic expansion valve is adjusted, the initial target superheat degree for the battery side is determined based on the evaporator surface temperature in the driving working condition, and the difference dT between the actual battery water inlet temperature T1 and the battery target water inlet temperature T2, i.e. dT = T1-T2, in the charging working condition.

[0133] Then, the final target superheat degree for the cab side and the final target superheat degree for the battery side are determined through the priority control of the cab refrigeration and the battery refrigeration. After that, the valve opening degree of the first electronic expansion valve is adjusted based on, for example, a PID algorithm, and the valve opening degree of the second electronic expansion valve is adjusted based on, for example, a PID algorithm.

[0134] Exemplary apparatuses

[0135] As shown in FIG. 7 The embodiment of the present application also provides an electronic expansion valve opening degree adjustment device. The heat management air conditioning system in the dual refrigeration mode of the cab and the battery is provided with a first electronic expansion valve and a second electronic expansion valve. The first electronic expansion valve is used to adjust the flow of refrigerant in the cab refrigeration, and the second electronic expansion valve is used to adjust the flow of refrigerant in the battery refrigeration. The device comprises a first adjustment module 701, a second adjustment module 702 and an opening degree setting module 703.

[0136] The determination module 701 is used to determine the refrigeration level of the cab based on the indoor temperature, and determine the refrigeration level of the battery based on the battery cell temperature.

[0137] The determination module 701 is used to determine the refrigeration level of the cab based on the indoor temperature, and determine the refrigeration level of the battery based on the battery cell temperature.

[0138] The first adjustment module 702 is used to adjust the target superheat degree for the cab side and the target superheat degree for the battery side based on the refrigeration level of the cab and the refrigeration level of the battery.

[0139] The second adjustment module 703 is used to adjust the opening degree of the first electronic expansion valve based on the target superheat degree for the cab side, and adjust the opening degree of the second electronic expansion valve based on the target superheat degree for the battery side.

[0140] The electronic expansion valve opening degree adjusting device provided by the embodiment belongs to the same application concept as the electronic expansion valve opening degree adjusting method provided by the above-mentioned embodiments of the application, can execute the method provided by any of the above-mentioned embodiments of the application, and has the function modules and beneficial effects corresponding to the execution method. The technical details not described in detail in the embodiment can be referred to the specific processing content of the electronic expansion valve opening degree adjusting method provided by the above-mentioned embodiments of the application, which will not be described here.

[0141] The functions implemented by the determining module 701, the first adjusting module 702 and the second adjusting module 703 above can be implemented by the same or different processors in the form of calling software, which is not limited in the embodiments of the application.

[0142] Exemplary electronic devices

[0143] Another embodiment of the application further provides an electronic device, which refers to FIG. 8 The electronic device includes a memory 800 and a processor 801.

[0144] The memory 800 is connected with the processor 801, and is configured to store programs.

[0145] The processor 801 is configured to realize the electronic expansion valve opening degree adjusting method disclosed in any of the above-mentioned embodiments by running the programs stored in the memory 800.

[0146] Specifically, the electronic device can further include a bus, a communication interface 802, an input device 803 and an output device 804.

[0147] The processor 801, the memory 800, the communication interface 802, the input device 803 and the output device 804 are connected with each other through the bus.

[0148] The bus can include a path for transmitting information between various components of the computer system.

[0149] The processor 801 can be a general-purpose processor, such as a general-purpose central processing unit (CPU), a microprocessor, etc., or can be an application-specific integrated circuit (ASIC), or one or more integrated circuits for controlling the execution of programs of the application. It can also be a digital signal processor (DSP), an application-specific integrated circuit (ASIC), a ready-to-use programmable gate array (FPGA) or other programmable logic device, a discrete gate or transistor logic device, a discrete hardware component.

[0150] The processor 801 can include a main processor, and can further include a baseband chip, a modem, etc.

[0151] The memory 800 stores programs for implementing the technical solutions of the present application, and can also store operating systems and other key services. Specifically, the programs can include program codes, and the program codes include computer operation instructions. More specifically, the memory 800 can include a read-only memory (ROM), other types of static storage devices that can store static information and instructions, a random access memory (RAM), other types of dynamic storage devices that can store information and instructions, a disk memory, a flash, and the like.

[0152] The input device 803 can include devices that receive data and information input by a user, such as a keyboard, a mouse, a camera, a scanner, a light pen, a voice input device, a touch screen, a pedometer, or a gravity sensor, and the like.

[0153] The output device 804 can include devices that allow information to be output to a user, such as a display screen, a printer, a speaker, and the like.

[0154] The communication interface 802 can include devices such as a transceiver, to communicate with other devices or communication networks, such as an Ethernet, a radio access network (RAN), a wireless local area network (WLAN), and the like.

[0155] The processor 801 executes the programs stored in the memory 800, and calls other devices, which can be used to implement each step of any one of the electronic expansion valve opening degree adjustment methods provided by the above-mentioned embodiments of the present application.

[0156] Those skilled in the art can understand that, FIG. 8 The structure shown in the figure is only a block diagram of part of the structure related to the technical solutions of the present application, and does not constitute a limitation on the electronic device to which the technical solutions of the present application are applied. The specific electronic device can include more or fewer components than those shown in the figure, or combine certain components, or have a different arrangement of components.

[0157] The embodiments of the present application also propose a chip, which includes a processor and a data interface. The processor reads and runs programs stored on a memory through the data interface, to execute the electronic expansion valve opening degree adjustment method introduced in any one of the above-mentioned embodiments. The specific processing process and its beneficial effects can be referred to the above-mentioned embodiment introduction of the electronic expansion valve opening degree adjustment method.

[0158] The embodiments of the present application also provide a vehicle, which is provided with the above-mentioned electronic expansion valve opening degree adjustment device or the above-mentioned electronic device.

[0159] In addition to the above method and device, the embodiments of the present application provide a computer program product comprising computer program instructions that, when executed by a processor, cause the processor to perform the steps of the electronic expansion valve opening degree adjustment method according to various embodiments of the present application described in the above "Exemplary Method" section of the present specification.

[0160] The computer program product can be written in any combination of one or more programming languages, including an object oriented programming language such as Java, C++, etc., and conventional procedural programming languages, such as the "C" programming language or similar programming languages. The program code can execute entirely on the user's computing device, partly on the user's device, as a stand-alone software package, partly on the user's computing device and partly on a remote computing device or entirely on the remote computing device or server.

[0161] In addition, the embodiments of the present application also provide a storage medium having stored thereon a computer program, which, when executed by a processor, causes the processor to perform the steps of the electronic expansion valve opening degree adjustment method according to various embodiments of the present application described in the above "Exemplary Method" section of the present specification.

[0162] The above describes the basic principles of the present application in conjunction with specific embodiments, but it should be noted that the advantages, benefits, effects and the like mentioned in the present application are only examples and are not limiting, and these advantages, benefits, effects and the like cannot be considered as necessary for each embodiment of the present application. In addition, the above specific details disclosed are only for the purpose of example and understanding, and are not limiting, and the above details do not limit the present application to be necessarily implemented with the above specific details.

[0163] The block diagrams of the devices, apparatuses, equipment, systems involved in the present application are only illustrative examples and are not intended to require or imply that the connections, arrangements, configurations must be as shown in the block diagrams. As those skilled in the art will recognize, these devices, apparatuses, equipment, systems can be connected, arranged, configured in any manner. Words such as "include", "contain", "have" and the like are open-ended words that mean "including but not limited to", and can be used interchangeably. The words "or" and "and" used herein mean the word "and / or", and can be used interchangeably unless the context clearly indicates otherwise. The word "such as" used herein means the phrase "such as but not limited to", and can be used interchangeably.

[0164] It should also be noted that in the apparatuses, equipment and methods of the present application, each component or each step can be decomposed and / or recombined. These decompositions and / or recombinations should be considered as equivalent solutions of the present application.

[0165] The above description of the disclosed aspects is provided to enable any person skilled in the art to make or use the application. Various modifications to these aspects will be readily apparent to those skilled in the art, and the generic principles defined herein can be applied to other aspects without departing from the scope of the application. Thus, the present application is not intended to be limited to the aspects shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

[0166] It should be understood that the limiting words "first", "second", "third", "fourth", "fifth" and "sixth" used in the embodiments description of the present application are only used for more clearly explaining the technical solutions, and cannot be used to limit the protection scope of the present application.

[0167] The above description has been presented for the purpose of illustration and description. Furthermore, this description is not intended to limit the embodiments of the application to the forms disclosed herein. Although several example aspects and embodiments have been discussed above, those of ordinary skill in the art will appreciate a variety of modifications, alternatives, permutations, additions, and sub-combinations of the described aspects and embodiments.

Claims

1. An electronic expansion valve opening degree adjustment method characterized by, The method is applied to a thermal management air conditioning system in a dual refrigeration mode of a cab and a battery, the thermal management air conditioning system is provided with a first electronic expansion valve and a second electronic expansion valve, the first electronic expansion valve is used to adjust the flow of refrigerant in cab refrigeration, and the second electronic expansion valve is used to adjust the flow of refrigerant in battery refrigeration, and the method comprises the following steps: determining the refrigeration level of the cab based on the temperature in the vehicle, and determining the refrigeration level of the battery based on the battery cell temperature; adjusting the target superheat degree of the cab side and the target superheat degree of the battery side based on the refrigeration level of the cab and the refrigeration level of the battery, comprising: determining the priority order of cab refrigeration and battery refrigeration based on the refrigeration level of the cab and the refrigeration level of the battery; adjusting the target superheat degree of the cab side and the target superheat degree of the battery side based on the priority order; adjusting the opening degree of the first electronic expansion valve based on the target superheat degree of the cab side, and adjusting the opening degree of the second electronic expansion valve based on the target superheat degree of the battery side.

2. The electronic expansion valve opening degree adjustment method according to claim 1, characterized by, The refrigeration level of the cab includes level 1 and level 2, and the determination of the refrigeration level of the cab based on the temperature in the vehicle comprises the following steps: if the temperature in the vehicle is less than or equal to a first preset temperature in the vehicle, the refrigeration level of the cab is determined to be level 1; if the temperature in the vehicle rises from less than or equal to the first preset temperature in the vehicle to greater than the first preset temperature in the vehicle and less than or equal to a second preset temperature in the vehicle, the refrigeration level of the cab is determined to be level 1; if the temperature in the vehicle decreases from greater than the second preset temperature in the vehicle to greater than the first preset temperature in the vehicle and less than or equal to the second preset temperature in the vehicle, the refrigeration level of the cab is determined to be level 2; if the temperature in the vehicle is greater than the second preset temperature in the vehicle, the refrigeration level of the cab is determined to be level 2.

3. The electronic expansion valve opening degree adjustment method according to claim 1, characterized by, The refrigeration level of the battery includes level 1 and level 2, and the determination of the refrigeration level of the battery based on the battery cell temperature comprises the following steps: if the battery cell temperature is less than or equal to a first preset cell temperature, the refrigeration level of the battery is determined to be level 1; if the battery cell temperature rises from less than or equal to the first preset cell temperature to greater than the first preset cell temperature and less than or equal to a second preset cell temperature, the refrigeration level of the battery is determined to be level 1; if the battery cell temperature decreases from greater than the second preset cell temperature to greater than the first preset cell temperature and less than or equal to the second preset cell temperature, the refrigeration level of the battery is determined to be level 2; if the battery cell temperature is greater than the second preset cell temperature, the refrigeration level of the battery is determined to be level 2.

4. The electronic expansion valve opening degree adjustment method according to claim 1, characterized by, The determination of the priority order of cab refrigeration and battery refrigeration based on the refrigeration level of the cab and the refrigeration level of the battery comprises the following steps: if the refrigeration level of the cab and the refrigeration level of the battery are both level 1, the priority of the cab refrigeration and the battery refrigeration in the priority order is determined to be the same; If the refrigeration level of the cab is level 2 and the refrigeration level of the battery is level 2, or the refrigeration level of the cab is level 1 and the refrigeration level of the battery is level 2, it is determined that the priority order is that the priority of the battery refrigeration is higher than the priority of the cab refrigeration. If the refrigeration level of the cab is level 2 and the refrigeration level of the battery is level 1, it is determined that the priority order is that the priority of the cab refrigeration is higher than the priority of the battery refrigeration.

5. The electronic expansion valve opening degree adjustment method according to claim 1, characterized by, Based on the priority order, the cab side target superheat degree and the battery side target superheat degree are adjusted, including: If the priorities of the cab refrigeration and the battery refrigeration are the same, the cab side target superheat degree is adjusted based on the vehicle temperature and the air conditioning panel setting temperature, and the battery side target superheat degree is adjusted based on the vehicle working condition. If the priority of the battery refrigeration is higher than the priority of the cab refrigeration, a first preset cab side superheat degree is determined as the cab side target superheat degree, and a first preset battery side superheat degree is determined as the battery side target superheat degree, the first preset cab side superheat degree being greater than the first preset battery side superheat degree. If the priority of the cab refrigeration is higher than the priority of the battery refrigeration, a second preset cab side superheat degree is determined as the cab side target superheat degree, and a second preset battery side superheat degree is determined as the battery side target superheat degree, the second preset cab side superheat degree being less than the second preset battery side superheat degree.

6. The electronic expansion valve opening degree adjustment method according to claim 5, characterized by, The battery side target superheat degree is adjusted based on the vehicle working condition, including: If the vehicle working condition is a driving working condition, the battery side target superheat degree is determined based on the evaporator surface temperature. If the vehicle working condition is a charging working condition, the battery side target superheat degree is determined based on the battery water inlet temperature.

7. An electronic expansion valve opening degree adjusting device characterized by comprising: The device is applied to a thermal management air conditioning system in a dual refrigeration mode of a cab and a battery, the thermal management air conditioning system is provided with a first electronic expansion valve and a second electronic expansion valve, the first electronic expansion valve is used to adjust the flow of refrigerant in the cab refrigeration, and the second electronic expansion valve is used to adjust the flow of refrigerant in the battery refrigeration, and the device includes: A determination module is configured to determine the refrigeration level of the cab based on the vehicle temperature and determine the refrigeration level of the battery based on the battery cell temperature. A first adjustment module is configured to adjust the cab side target superheat degree and the battery side target superheat degree based on the refrigeration level of the cab and the refrigeration level of the battery, including: judging the priority order of the cab refrigeration and the battery refrigeration based on the refrigeration level of the cab and the refrigeration level of the battery; and adjusting the cab side target superheat degree and the battery side target superheat degree based on the priority order. A second adjustment module is configured to adjust the opening degree of the first electronic expansion valve based on the cab side target superheat degree and adjust the opening degree of the second electronic expansion valve based on the battery side target superheat degree.

8. An electronic device, comprising: including a memory and a processor; The memory is connected with the processor and is used to store programs; The processor is configured to implement the electronic expansion valve opening degree adjustment method according to any one of claims 1 to 6 by running a program in the memory.

9. A vehicle characterized by comprising: The vehicle is provided with the electronic expansion valve opening degree adjustment device according to claim 7, or the electronic device according to claim 8.

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