Method, device and equipment for adjusting opening degree of electronic expansion valve and vehicle

Abstract

The invention provides an electronic expansion valve opening degree adjusting method, device and equipment and a vehicle. The refrigeration level of a cab is determined based on the temperature in the vehicle, the refrigeration level of a battery is determined based on the battery cell temperature, and the opening degree of an electronic expansion valve is adjusted based on the refrigeration level of the cab and the refrigeration level of the battery. According to the method, the cab side target superheat degree and the battery side target superheat degree are determined according to the vehicle interior temperature and the battery cell temperature, so that active adjustment of the cab side target superheat degree and the battery side target superheat degree is achieved based on the vehicle interior temperature and the battery cell temperature, and then the opening degree of a first electronic expansion valve is adjusted based on the cab side target superheat degree. And the opening degree of the second electronic expansion valve is adjusted based on the battery side target superheat degree, reasonable distribution of the refrigerating capacity or refrigerant flow of cab side refrigeration and battery side refrigeration is achieved, and the cab refrigeration effect and the battery refrigeration effect are ensured.

Description

Technical Field

[0001] The present application relates to the field of air conditioning technology, and in particular to an electronic expansion valve opening adjustment method, device, equipment and vehicle. Background Art

[0002] In the prior art, when the thermal management air conditioning system is in the dual cooling mode of the cab and the battery, the cab side cooling is controlled by the electromagnetic control valve and the thermal expansion valve, and the battery side cooling is controlled by the electronic expansion valve, which will cause the valve opening on the cab side to be uncontrollable. In addition, the opening of the electronic expansion valve is usually controlled by the opening table method or the target superheat algorithm, which is a passive adjustment and cannot reasonably allocate the cooling capacity of the cab side cooling and the battery side cooling in the system. Summary of the invention

[0003] Based on the defects and shortcomings of the above-mentioned prior art, the present application proposes an electronic expansion valve opening adjustment method, device, equipment and vehicle, which can determine the target superheat of the cab side and the target superheat of the battery side based on the cooling level of the cab and the cooling level of the battery, and adjust the opening of the first electronic expansion valve and the opening of the second electronic expansion valve based on the target superheat of the cab side and the target superheat of the battery side, so as to solve the problem of unreasonable refrigeration distribution of the cab side and the battery side due to the uncontrollable or passive adjustment of the valve opening on the cab side.

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

[0005] Determine the cooling level of the cabin based on the vehicle interior temperature and determine the cooling level of the battery based on the battery cell temperature;

[0006] Determining a target overheat degree on the cab side and a target overheat degree on the battery side based on a cooling level of the cab and a cooling level of the battery;

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

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

[0009] A determination module, configured to determine a cooling level of the cab based on the temperature inside the vehicle, and to determine a cooling level of the battery based on the temperature of the battery cell;

[0010] A first adjustment module, configured to adjust a target overheat degree of the cab side and a target overheat degree of the battery side based on a cooling level of the cab and a cooling level of the battery;

[0011] The second regulating module is used to regulate the opening of the first electronic expansion valve based on the target superheat on the cab side, and to regulate the opening of the second electronic expansion valve based on the target superheat on the battery side.

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

[0013] The memory is connected to the processor and is used to store programs;

[0014] The processor is used to implement the electronic expansion valve opening adjustment method as described in the first aspect by running the program in the memory.

[0015] According to a fourth aspect of an embodiment of the present application, a storage medium is provided, on which a computer program is stored. When the computer program is executed by a processor, the electronic expansion valve opening adjustment method as described in the first aspect is implemented.

[0016] According to a fifth aspect of an embodiment of the present application, a vehicle is provided, wherein the vehicle is provided with the electronic expansion valve opening adjustment device as described in the second aspect, or the electronic device as described in the third aspect.

[0017] In the above-mentioned electronic expansion valve opening adjustment method, device, equipment and vehicle, the cooling level of the cab can be determined based on the temperature in the vehicle, the cooling level of the battery can be determined based on the temperature of the battery cell, and the target overheat of the cab side and the target overheat of the battery side can be determined based on the cooling level of the cab and the cooling level of the battery, thereby achieving active adjustment of the target overheat of the cab side and the target overheat of the battery side based on the temperature in the vehicle and the temperature of the battery cell. Thereafter, the opening of the first electronic expansion valve is adjusted based on the target overheat of the cab side, and the opening of the second electronic expansion valve is adjusted based on the target overheat of the battery side, thereby achieving a reasonable distribution of the cooling capacity or refrigerant flow of the cab side refrigeration and the battery side refrigeration, thereby ensuring the cooling effect of the cab and the battery. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on the provided drawings without paying any creative work.

[0019] Figure 1 A schematic diagram of a feasible application scenario of a method for adjusting the opening of an electronic expansion valve provided in an embodiment of the present application;

[0020] Figure 2 A schematic diagram of a process of an electronic expansion valve opening adjustment method provided in an embodiment of the present application;

[0021] Figure 3 A schematic diagram of a process flow of priority control of cab cooling and battery cooling provided in an embodiment of the present application;

[0022] Figure 4 A schematic diagram of a process for adjusting the target superheat degree on the cab side proposed in an embodiment of the present application;

[0023] Figure 5 A schematic diagram of a process for adjusting a target superheat degree on a battery side proposed in an embodiment of the present application;

[0024] Figure 6 A schematic diagram of an electronic expansion valve regulation process proposed in an embodiment of the present application;

[0025] Figure 7 A schematic diagram of the structure of an electronic expansion valve opening adjustment device proposed in an embodiment of the present application;

[0026] Figure 8 A schematic diagram of the structure of an electronic device proposed in an embodiment of the present application. DETAILED DESCRIPTION

[0027] The following will be combined with the drawings in the embodiments of the present application to clearly and completely describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0028] Overview

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

[0030] On this basis, the inventors found through further research that by determining the cooling level of the cab based on the temperature inside the vehicle, determining the cooling level of the battery based on the battery cell temperature, and determining the target overheat of the cab side and the target overheat of the battery side based on the cooling level of the cab and the cooling level of the battery, the active adjustment of the target overheat of the cab side and the target overheat of the battery side is achieved based on the temperature inside the vehicle and the temperature of the battery cell. Afterwards, the opening of the first electronic expansion valve is adjusted based on the target overheat of the cab side, and the opening of the second electronic expansion valve is adjusted based on the target overheat of the battery side, so as to achieve a reasonable distribution of the cooling capacity or refrigerant flow of the cab side refrigeration and the battery side refrigeration, thereby ensuring the cooling effect of the cab and the battery.

[0031] Based on the above concept, an embodiment of the present specification provides an electronic expansion valve opening adjustment method, which will be described exemplarily in conjunction with the accompanying drawings.

[0032] Example scenarios

[0033] like Figure 1 As 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, and the compressor 110 sucks in the low-temperature and low-pressure gaseous refrigerant, i.e., the refrigerant, and compresses it into a high-pressure and high-temperature gaseous refrigerant, which is sent to the condenser 120 along the pipeline. The compressor 110 drives the refrigerant to circulate in the system to provide power for the refrigeration cycle. The condenser 120 dissipates the high-temperature and high-pressure refrigerant vapor discharged from the compressor 110 into the atmosphere through the radiator 450, condensing it into liquid refrigerant. The liquid refrigerant continues to pass through the first electronic expansion valve 130 along the pipeline to the evaporator 140. The evaporator 140 converts the low-temperature and low-pressure liquid refrigerant into a low-temperature and low-pressure gaseous refrigerant to provide a cooling effect for the cab. The gaseous refrigerant continues to return to the compressor 110 along the pipeline, and the cycle is repeated in this way to reduce the temperature of the cab.

[0035] like Figure 1 As shown, 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 refrigerant flows through the heat exchanger 220, it exchanges heat with the cooling water in the heat exchanger 220. At the same time, the second water pump 230 is turned on to circulate water to reduce the battery temperature.

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

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

[0039] When the cab needs to be heated, the water temperature is adjusted by adjusting the power of the PTC heater 310 to increase the water temperature. At the same time, the first water pump 330 is turned on for water circulation, 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 transfers the heat energy to the cab through the air-conditioning system to heat the cab.

[0040] like Figure 1 As shown, the thermal management air conditioning system also includes a second water tank 240 .

[0041] When the battery needs to be heated, the second electronic expansion valve 210 is disconnected. When the refrigerant flows through the heat exchanger 220, it does not exchange heat with the cooling water in the heat exchanger 220. The second water pump 230 is turned on for water circulation, so that the water in the second water tank 240 flows through the second water pump 230 to the battery box assembly 250, and then returns to the second water tank 240. This cycle is repeated to heat the battery evenly.

[0042] like Figure 1 As shown, the thermal management air conditioning system further includes 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 includes a chassis drive motor, a top motor and a top motor driver, and the controller 440 can be an all-in-one controller.

[0044] As the heat generated by the motor group 410 and the controller 440 increases with the increase in working time, the fan 460 on the radiator 450 inhales air and accelerates its flow, so that the coolant flowing through the radiator 450 is cooled more quickly, thereby reducing the temperature of the third water tank 420. The third water pump 430 is turned on to promote the circulation of cooling water to reduce the temperature of the cooling water in the entire pipeline. This cycle is repeated to achieve heat dissipation for the motor group 410 and the controller 440. At the same time, the fan 460 is used to dissipate heat for the condenser 120.

[0045] It is understandable that the operating modes of the thermal management air-conditioning system include single cab cooling mode, single battery cooling mode, cab and battery dual cooling mode, cab heating and battery cooling mode, cooling and demisting mode, heating and demisting 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 follows: Figure 1 As indicated by the arrows shown.

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

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

[0049] Exemplary Methods

[0050] See also Figure 2 In an exemplary embodiment, a method for adjusting the opening of an electronic expansion valve is provided, which is applied to Figure 1In the thermal management air-conditioning system shown, the thermal management air-conditioning system is in a dual cooling mode of the cab and the 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 rate of the refrigerant in the cab cooling, and the second electronic expansion valve is used to adjust the flow rate of the refrigerant in the battery cooling.

[0051] like Figure 2 As shown, the electronic expansion valve opening adjustment method includes steps S201-S203:

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

[0053] The in-car temperature is detected by the in-car temperature sensor. Generally, the in-car temperature is a real-time temperature.

[0054] The cooling level of the cab can be used to characterize the importance of cab cooling. The higher the cooling level of the cab, the more important the cab cooling is, and the higher the gear / intensity of the cab cooling is.

[0055] Since the higher the temperature inside the vehicle, the more the cab needs to be cooled, the more important the cab cooling is. Therefore, the higher the temperature inside the vehicle, the higher the cooling level of the cab.

[0056] Specifically, the cooling level of the cab can be divided into at least two levels based on actual needs. In the embodiment of the present application, the cooling level of the cab is divided into two levels as an example to introduce the solution. The two levels are level 1 and level 2.

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

[0058] In addition, the battery cell temperature is obtained by detecting the battery cell temperature through the battery cell temperature sensor. Generally, the battery cell temperature is a real-time temperature.

[0059] The battery cooling level can be used to characterize the importance of battery cooling. The higher the battery cooling level, the more important the battery cooling is, and the higher the gear / intensity of the battery cooling is.

[0060] Since the higher the battery cell temperature, the more the battery needs to be cooled, the more important the battery cooling is. Therefore, the higher the battery cell temperature, the higher the battery cooling level.

[0061] Specifically, the cooling level of the battery can be divided into at least two levels based on actual needs. In the embodiment of the present application, the cooling level of the battery is divided into two levels as an example to introduce the solution. The two priorities are level 1 and level 2 respectively.

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

[0063] S202: Adjusting a target superheat degree on the cab side and a target superheat degree on the battery side based on a cooling level of the cab and a cooling level of the battery.

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

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

[0066] Specifically, the target superheat degree on the cab side may be adjusted based on the cooling level of the cab.

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

[0068] For example, when the cooling level of the cab is level 1, the target superheat degree of the cab side is adjusted to △T1 corresponding to the cooling level of the cab, and when the cooling level of the cab is level 2, the target superheat degree of the cab side is adjusted to △T2 corresponding to the cooling level of the cab 2. If the cooling intensity of level 1 is lower than that of level 2, then △T1>△T2.

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

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

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

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

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

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

[0075] Accordingly, the difference between the target superheat degree on the battery side and the actual superheat degree on the battery side is first 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, the difference between the target superheat degree on the battery side and the actual superheat degree on the battery side is first 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 is proportional integral derivative (PID) adjustment or proportional integral (PI) adjustment, etc.

[0076] In this way, by setting the opening of the second electronic expansion valve based on the required opening of the second electronic expansion valve, the difference between the target superheat on the battery side and the actual superheat on the battery side can be effectively eliminated, and the actual superheat on the battery side can be adjusted to the target superheat on the battery side, thereby ensuring the cooling effect on the battery side.

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

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

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

[0080] In this embodiment, the cooling level of the cab is determined based on the temperature inside the vehicle, the cooling level of the battery is determined based on the temperature of the battery cell, and the target overheat of the cab side and the target overheat of the battery side are determined based on the cooling level of the cab and the cooling level of the battery. Thus, based on the temperature inside the vehicle and the temperature of the battery cell, active adjustment of the target overheat of the cab side and the target overheat of the battery side is achieved. Thereafter, the opening of the first electronic expansion valve is adjusted based on the target overheat of the cab side, and the opening of the second electronic expansion valve is adjusted based on the target overheat of the battery side, so as to achieve a reasonable distribution of the cooling capacity or refrigerant flow of the cab side refrigeration and the battery side refrigeration, thereby ensuring the cooling effect of the cab and the battery.

[0081] In order to reduce the impact of temperature fluctuations inside the vehicle on the determination of the cooling level of the cab and ensure stability and reliability in determining the cooling level of the cab, in some embodiments, when determining the cooling level of the cab based on the temperature inside the vehicle, a buffer temperature interval for the temperature inside the vehicle, i.e., an in-vehicle buffer temperature interval or an in-vehicle temperature hysteresis interval, is set, and the cooling level of the cab is determined in combination with the changing trend of the temperature inside the vehicle.

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

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

[0084] If the interior temperature is less than or equal to the first preset interior temperature, the cooling level of the cab is determined to be level 1; if the interior temperature is within the interior buffer temperature range, that is, the interior temperature is greater than the first preset interior temperature and less than or equal to the second preset interior temperature, the cooling level of the cab is determined based on the changing trend of the interior temperature; if the interior temperature is greater than the second preset interior temperature, the cooling level of the cab is determined to be level 2.

[0085] When determining the cooling level of the cab based on the changing trend of the interior temperature of the vehicle, if the interior temperature of the vehicle rises from less than or equal to the first preset interior temperature to the interior buffer temperature range, the cooling level of the cab is determined to be level 1; if the interior temperature of the vehicle decreases from greater than the second preset interior temperature to the interior buffer temperature range, the cooling level of the cab is determined to be level 2.

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

[0087] Exemplarily, taking the example of dividing the cooling level of the cab into level 1 and level 2 according to the temperature inside the vehicle, when determining the cooling level of the cab, that is, the vehicle state state_cabin, based on the vehicle temperature Tc, if Tc≤30℃, then state_cabin=1, and state_cabin=1 indicates that the cooling level of the cab is level 1; if Tc>32℃, then state_cabin=2, and state_cabin=2 indicates that the cooling level of the cab is level 2; if 30℃<Tc≤32℃, then state_cabin=unchanged, and state_cabin=unchanged indicates the hysteresis interval of the vehicle temperature, and the first measured Tc satisfies 30℃<Tc≤32℃, then unchanged is 2, Tc changes from Tc≤30℃ to 30℃<Tc≤32℃, then unchanged is 1, and Tc changes from Tc>32℃ to 30℃<Tc≤32℃, then unchanged is 2.

[0088] In this embodiment, an in-vehicle buffer temperature interval is set for the in-vehicle temperature. When the in-vehicle temperature is less than or equal to the first preset in-vehicle temperature, that is, the in-vehicle temperature is not higher than the lower limit of the in-vehicle buffer temperature interval, the cooling level of the cab is determined to be level 1. When 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. When 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, which is higher than level 1. When 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. In this way, the cooling level of the cab can be determined based on whether the in-vehicle temperature is within the in-vehicle buffer temperature interval, and whether the in-vehicle temperature is greater than the in-vehicle buffer temperature interval or less than the in-vehicle buffer temperature interval before, which can effectively reduce the influence of the fluctuation of the in-vehicle temperature on the cooling level of the cab and ensure the stability and reliability of the determined cooling level of the cab.

[0089] In some embodiments, if the indoor temperature cannot be detected, the evaporator surface temperature is used instead of the indoor temperature to perform logic control in the above manner to determine the cooling level of the cab.

[0090] In order to reduce the impact of battery cell temperature fluctuations on the determination of the battery cooling level and ensure the stability and reliability of the determined battery cooling level, in some embodiments, when determining the battery cooling level based on the battery cell temperature, a battery cell buffer temperature range or a battery cell temperature hysteresis range is set for the battery cell temperature, and the battery cooling level is determined in combination with the changing trend of the battery cell temperature.

[0091] Among them, the upper and lower limits of the battery cell buffer temperature range are preset battery cell temperatures, which are respectively the first preset battery cell temperature and the second preset battery cell temperature, 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 cell temperature to the cell buffer temperature range, or the battery cell temperature decreases from greater than or equal to the second preset cell temperature to the cell buffer temperature range.

[0093] If the battery cell temperature is less than or equal to the first preset cell temperature, the battery cooling level is determined to be level 1; if the battery cell temperature is within the battery cell buffer temperature range, that is, the battery cell temperature is greater than the first preset cell temperature and less than or equal to the second preset cell temperature, then based on the changing trend of the battery cell temperature, the battery cooling level is determined; if the battery cell temperature is greater than the second preset cell temperature, the battery cooling level is determined to be level 2.

[0094] When determining the battery cooling level based on the changing trend of the battery cell temperature, if the changing trend of the battery cell temperature is that the battery cell temperature increases from less than or equal to the first preset cell temperature to the cell buffer temperature interval, then the battery cooling level is determined to be level 1; if the battery cell temperature decreases from greater than or equal to the second preset cell temperature to the cell buffer temperature interval, then the battery cooling level is determined to be level 2.

[0095] That is, if the battery cell temperature is less than or equal to the first preset cell temperature, the battery cooling level is determined to be level 1; if the battery cell temperature rises 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; if the battery cell temperature decreases from greater than or equal to the second preset cell temperature to the cell buffer temperature interval, the battery cooling level is determined to be level 2; if the battery cell temperature is greater than the second preset cell temperature, the battery cooling level is determined to be level 2.

[0096] Exemplarily, taking the battery cooling level being divided into level 1 and level 2 according to the battery cell temperature as an example, when determining the battery cooling level, i.e., the battery state state_battery, based on the battery cell temperature Tb, if Tb≤45°C, then state_battery=1, and state_battery=1 indicates that the battery cooling level is level 1; if Tb>47°C, then state_battery=2, and state_battery=2 indicates that the battery cooling level is level 2; if 45°C<Tb≤47°C, then state_battery=unchanged, and state_battery=unchanged indicates the hysteresis interval, and the first measured Tb satisfies 45°C<Tb≤47°C, then unchanged is 1, and Tb changes from Tb≤45°C to 45°C<Tb≤47°C, then unchanged is 1, and Tb changes from Tb>47°C to 45°C<Tb≤47°C, then 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 the first preset cell temperature, that is, 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 rises 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 the 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 within 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, which can effectively reduce the influence of the fluctuation of the battery cell temperature on the battery cooling level and ensure the stability and reliability of the determined battery cooling level.

[0098] In order to achieve a reasonable distribution of refrigerant flow in cab cooling and battery cooling, in some embodiments, when determining the target overheat of the cab side and the target overheat of the battery side based on the cooling level of the cab and the cooling level of the battery, first judge the priority order of cab cooling and battery cooling based on the cooling level of the cab and the cooling level of the battery, and adjust the target overheat of the cab side and the target overheat of the battery side based on the priority order of cab cooling and battery cooling.

[0099] Among them, the priority order of cab cooling and battery cooling represents the importance of cab cooling relative to battery cooling.

[0100] Specifically, in the priority order of cab cooling and battery cooling, if cab cooling is before battery cooling, that is, cab cooling takes precedence over battery cooling, then this priority order represents that the importance of cab cooling is higher than the importance of battery cooling; if cab cooling is after battery cooling, that is, battery cooling takes precedence over cab cooling, then this priority order represents that the importance of cab cooling is lower than the importance of battery cooling.

[0101] When adjusting the target overheat of the cab side and the target overheat of the battery side based on the priority order of cab cooling and battery cooling, generally, if the cab cooling takes precedence over the battery cooling, the target overheat of the cab side is adjusted to be lower than the target overheat of the battery side; if the battery cooling takes precedence over the cab cooling, the target overheat of the cab side is adjusted to be higher than the target overheat of the battery side.

[0102] When the thermal management air conditioning system is in operation, the battery safety must be ensured first. On this basis, the tolerance of the human body cannot be exceeded. On the basis that the battery safety and human tolerance are met, the battery performance and human comfort can be further considered to ensure the performance of the thermal management air conditioning system. When the thermal management air conditioning system works in dual cooling mode, when the cooling level of the cab is level 1, it can meet the human comfort requirements, when the cooling level of the battery is level 1, it can ensure the battery performance, when the cooling level of the cab is level 2, it can meet the human tolerance requirements, and when the cooling level of the battery is level 2, it can meet the battery safety requirements.

[0103] Therefore, based on the cooling level of the cab and the cooling level of the battery, when judging the priority order between cab cooling and battery cooling, the priority of state_cabin=1 is the same as the priority of state_battery=1, 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 cooling level of the cab and the cooling level of the battery are both level 1, it is determined that the priority of cab cooling and battery cooling is the same; if the cooling level of the cab and the cooling level of the battery are both level 2, or the cooling level of the cab is level 1 and the cooling level of the battery is level 2, then the priority order between cab cooling and battery cooling is determined to be battery cooling takes precedence over cab cooling, that is, the priority of battery cooling is higher than the priority of cab cooling; if the cooling level of the cab is level 2 and the cooling level of the battery is level 1, then the priority order between cab cooling and battery cooling is determined to be cab cooling takes precedence over battery cooling, that is, the priority of cab cooling is higher than the priority of battery cooling.

[0105] Specifically, based on the priority order between cab cooling and battery cooling, when adjusting the target overheat of the cab side and the target overheat of the battery side, if the cab cooling and the battery cooling have the same priority, the target overheat of the cab side is adjusted based on the temperature inside the vehicle and the set temperature of the air-conditioning panel, and the target overheat of the battery side is adjusted based on the vehicle operating conditions; if the priority of cab cooling is higher than the priority of battery cooling, or the priority of cab cooling is lower than the priority of battery cooling, the target overheat of the cab side and the target overheat of the battery side are adjusted by assigning preset values.

[0106] Among them, when adjusting the target overheat of the cab side and the target overheat of the battery side by assigning preset values, if the priority of battery cooling is higher than that of cab cooling, the first preset cab side overheat is determined as the target overheat of the cab side, the first preset battery side overheat is determined as the target overheat of the battery side, and the first preset cab side overheat is greater than the first preset battery side overheat; if the priority of cab cooling is higher than that of battery cooling, the second preset cab side overheat is determined as the target overheat of the cab side, the second preset battery side overheat is determined as the target overheat of the battery side, and the second preset cab side overheat is less than the second preset battery side overheat.

[0107] For example, the first preset cab side overheat is 25° C., and the first preset battery side overheat is 5° C. The second preset cab side overheat is 6° C., and the second preset battery side overheat is 28° C.

[0108] That is to say, when the priority of cab cooling and battery cooling is the same, there is no intervention in the determination of the target overheat of the cab side and the target overheat of the battery side. The target overheat of the cab side and the target overheat of the battery side are determined directly based on relevant temperature parameters and operating conditions. When cab cooling takes precedence over battery cooling or battery cooling takes precedence over cab cooling, the target overheat of the cab side and the target overheat of the battery side are directly assigned values ​​to control the values ​​of the target overheat of the cab side and the target overheat of the battery side.

[0109] For example, the process of determining the priority order of cabin cooling and battery cooling, or the process of controlling the priority of cabin cooling and battery cooling, can be as follows: Figure 3 As shown. Among them, based on the actual indoor temperature of the cab (i.e. the above-mentioned vehicle interior temperature), the cooling level of the cab is determined to be level 1 or level 2, and based on the (maximum) temperature of the battery cell, the cooling level of the battery is determined to be level 1 or level 2. If the cooling level of the cab and the cooling level of the battery are both level 1, the cooling state of the thermal management air-conditioning system is determined to be state 1, and no intervention is performed in state 1, that is, the priority of cab cooling and battery cooling is not set; if the cooling level of the cab is level 2 and the cooling level of the battery is level 1, the cooling state of the thermal management air-conditioning system is determined to be state 2, and cab cooling is prioritized in state 2, that is, the priority of cab cooling is set higher than the priority of battery cooling; if the cooling level of the cab is level 1 and the cooling level of the battery is level 2, the cooling state of the thermal management air-conditioning system is determined to be state 3, and battery cooling is prioritized in state 3, that is, the priority of battery cooling is set higher than the priority of cab cooling; if the cooling level of the cab and the cooling level of the battery are both level 2, the cooling state of the thermal management air-conditioning system is determined to be state 4, and battery cooling is prioritized in state 4, that is, the priority of battery cooling is set higher than the priority of cab cooling.

[0110] That is to say, when adjusting the target overheat of the cab side and the target overheat of the battery side based on the cooling level of the cab and the cooling level of the battery, if the cooling level of the cab and the cooling level of the battery are both level 1, the target overheat of the cab side is adjusted based on the temperature in the vehicle and the set temperature of the air-conditioning panel, and the target overheat of the battery side is adjusted based on the vehicle operating condition; if the cooling level of the cab and the cooling level of the battery are both level 2, or the cooling level of the cab is level 1 and the cooling level of the battery is level 2, the first preset overheat of the cab side is determined as the target overheat of the cab side, the first preset overheat of the battery side is determined as the target overheat of the battery side, and the first preset overheat of the cab side is greater than the first preset overheat of the battery side; if the cooling level of the cab is level 2 and the cooling level of the battery is level 1, the second preset overheat of the cab side is determined as the target overheat of the cab side, the second preset overheat of the battery side is determined as the target overheat of the battery side, and the second preset overheat of the cab side is less than the second preset overheat of the battery side.

[0111] In this way, when determining the target overheat of the cab side and the target overheat of the battery side based on the cooling level of the cab and the cooling level of the battery, the target overheat of the cab side and the target overheat of the battery side are determined based on the cooling level of the battery and the cab using relevant temperature parameters and operating conditions, or the target overheat of the cab side and the target overheat of the battery side are directly assigned, and the target overheat of the cab side and the target overheat of the battery side can be adjusted based on the actual operating conditions to ensure the reasonable distribution of refrigerant flow in cab cooling and battery cooling.

[0112] In order to ensure the cooling effect of the cab, in some embodiments, when determining the target superheat of the cab side based on the interior temperature of the vehicle and the set temperature of the air-conditioning panel, the first difference is first determined, that is, the difference between the interior temperature of the vehicle and the set temperature of the air-conditioning panel. Then, based on the first difference, the superheat of the cab side is adjusted to obtain the target superheat of the cab side.

[0113] When adjusting the superheat degree on the cab side, the adjusted superheat degree on the cab side is the initial target superheat degree on the cab side, or the target superheat degree on the cab side after the last adjustment.

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

[0115] For example, the process of adjusting the target superheat degree of the cab side based on the first difference may be as follows: Figure 4 The target superheat degree on the cab side is a variable value, which varies within the preset cab side superheat degree range. The variation can be divided into 4 cases, among which the preset cab side superheat degree range is [5℃, 8℃]:

[0116] Case 1: When the difference between the actual temperature inside the vehicle (i.e. the above-mentioned temperature inside the vehicle) and the set temperature of the air-conditioning panel, i.e. the first difference dT≤0°C, the target superheat on the cab side is set to the maximum value within the preset cab side superheat range, i.e. 8°C.

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

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

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

[0120] In this embodiment, based on the difference between the temperature inside the vehicle and the set temperature of the air-conditioning panel, that is, the first difference, the superheat on the cab side is adjusted to obtain the target superheat on the cab side, thereby achieving active and reasonable adjustment of the target superheat on the cab side, and when the opening of the first electronic expansion valve is adjusted based on the target superheat on the cab side, a reasonable refrigerant flow is allocated to the cab side to ensure the cooling effect of the cab.

[0121] In some embodiments, the method for adjusting the superheat on the cab side may be PID adjustment or PI adjustment.

[0122] Since the working state of the battery is different under driving or charging conditions, in order to ensure the battery cooling effect, when adjusting the target overheat of the battery side based on the vehicle operating condition, the target overheat of the battery side can be determined based on whether the vehicle operating condition is a driving condition or a charging condition.

[0123] Among them, if the vehicle operating condition is a driving condition, the target superheat of the battery side is determined based on the evaporator surface temperature; if the vehicle operating condition is a charging condition, the target superheat of the battery side is determined based on the battery water inlet temperature.

[0124] Specifically, when determining the target superheat degree of the battery side based on the evaporator surface temperature, the evaporator target surface temperature is used as the target, and based on the difference between the evaporator surface temperature and the evaporator target surface temperature, the battery side superheat degree is adjusted by table lookup or adaptive algorithm adjustment to obtain the battery side target superheat degree. Exemplarily, the adjustment range of the adjusted battery side superheat degree is [15°C, 30°C], and accordingly, the value range of the battery side target superheat degree is [15°C, 30°C].

[0125] Among them, when the evaporator surface temperature is far away from the evaporator target surface temperature, that is, when the difference between the evaporator surface temperature and the evaporator target surface temperature increases, the target superheat on the battery side increases; when the evaporator surface temperature is close to the evaporator target surface temperature, that is, when the difference between the evaporator surface temperature and the evaporator target surface temperature decreases, the target superheat on the battery side decreases.

[0126] Specifically, when determining the target temperature of the battery side based on the battery water inlet temperature, first determine the second difference, that is, the difference between the battery water inlet temperature and the preset battery water inlet temperature, and then adjust the overheat of the battery side based on the second difference to obtain the target overheat of the battery side.

[0127] Among them, the larger the second difference is, the smaller the target overheat degree on the battery side is, and the smaller the second difference is, the larger the target overheat degree on the battery side is.

[0128] For example, the process of adjusting the target superheat of the battery side can be as follows: Figure 5 The target overheat degree of the battery side is a variable value, and the adjustment of the target temperature of the battery side can be divided into two cases:

[0129] Case 1: Under driving conditions, the target surface temperature of the evaporator in the cab is used as the target, and the battery side superheat is adjusted by table lookup or adaptive algorithm, and the adjustment range is [15°C, 30°C] to obtain the driving-battery side target superheat, that is, the battery side target superheat under driving conditions. Example: When the evaporator surface temperature is far away from the target surface temperature, the battery side superheat increases, and when the evaporator surface temperature is close to the target surface temperature, the battery side superheat decreases.

[0130] Case 2: Under charging conditions, the target overheat degree of the battery side 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, i.e., the second difference dT=T1-T2. Among them, dT represents the difference between the battery (actual) water inlet temperature and the battery target water inlet temperature, T1 represents the battery water inlet temperature, and T2 represents the battery target water inlet temperature. The smaller dT is, the greater the target overheat degree of the battery side is, and the larger dT is, the smaller the target overheat degree of the battery side is. In addition, the (adjustment) range of the target overheat degree of the battery side is defined as [Ovt min , Ovt max ], Ovt max The maximum value of the adjustment range of the target overheat degree on the battery side, Ovt min The minimum value of the adjustment range of the target superheat degree on the battery side is represented, for example, [15°C, 25°C]; the range of dT is defined as [dT min , dT max ], dT max Characterizes the maximum value of dT, dT min Characterizes the minimum value of dT, Ovt min The minimum value of the adjustment range of the target overheat degree of the battery side is represented, for example, [0°C, 15°C]; the target water inlet temperature of the battery is a fixed value, for example, 15°C. According to Ovt = [(Ovt max -Ovt min ) / (dT max -dT min )]*(dT-dT min )+Ovt min The target superheat of the charging-battery side is calculated, that is, the target superheat of the battery side under the charging condition, and Ovt represents the target superheat of the charging-battery side.

[0131] In this way, based on different operating conditions, during driving conditions, the target superheat of the battery side can be determined based on the evaporator surface temperature, and during charging conditions, the target superheat of the battery side can be determined based on the battery inlet water temperature, thereby achieving targeted adjustment of the target superheat of the battery side according to different operating conditions, thereby effectively ensuring the battery cooling effect under different operating conditions.

[0132] For example, the adjustment process of the first electronic expansion valve and the second electronic expansion valve may be as follows: Figure 6 As shown, when the thermal management air-conditioning system is in the dual cooling mode of the cab and the battery, when the opening of the first electronic expansion valve on the cab side is adjusted, the initial target superheat of the cab side is determined based on the difference range between the actual indoor temperature and the set temperature of the air-conditioning panel; when the opening of the second electronic expansion valve is adjusted, under the driving condition, the initial target superheat of the battery side is determined based on the evaporator surface temperature, and under the charging condition, the initial target superheat of the battery side is determined based on the difference dT between the actual battery water inlet temperature T1 and the target battery water inlet temperature T2, that is, dT=T1-T2.

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

[0134] Exemplary Devices

[0135] like Figure 7 As shown, an embodiment of the present application also provides an electronic expansion valve opening adjustment device, in a thermal management air-conditioning system in a dual cooling mode of a cab and a battery, wherein a first electronic expansion valve and a second electronic expansion valve are provided in the thermal management air-conditioning system, the first electronic expansion valve is used to adjust the flow rate of the refrigerant in the cab cooling, and the second electronic expansion valve is used to adjust the flow rate of the refrigerant in the battery cooling, and the device includes a first adjustment module 701, a second adjustment module 702 and an opening setting module 703.

[0136] in,

[0137] A determination module 701, configured to determine a cooling level of the cab based on the temperature inside the vehicle, and to determine a cooling level of the battery based on the temperature of the battery cell;

[0138] A first adjustment module 702, configured to adjust a target overheat degree of the cab side and a target overheat degree of the battery side based on a cooling level of the cab and a cooling level of the battery;

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

[0140] The electronic expansion valve opening adjustment device provided in this embodiment belongs to the same application concept as the electronic expansion valve opening adjustment method provided in the above embodiment of this application, and can execute the method provided in any of the above embodiments of this application, and has the corresponding functional modules and beneficial effects of the execution method. For the technical details not fully described in this embodiment, please refer to the specific processing content of the electronic expansion valve opening adjustment method provided in the above embodiment of this application, which will not be repeated here.

[0141] The functions implemented by the above determination module 701, the first adjustment module 702 and the second adjustment module 703 can be implemented in the form of software called by the same or different processors, respectively, and the embodiment of the present application is not limited thereto.

[0142] Exemplary Electronic Devices

[0143] Another embodiment of the present application also provides an electronic device, see Figure 8 As shown, the electronic device includes: a memory 800 and a processor 801.

[0144] The memory 800 is connected to the processor 801 and is used to store programs;

[0145] The processor 801 is used to implement the electronic expansion valve opening adjustment method disclosed in any of the above embodiments by running the program stored in the memory 800.

[0146] Specifically, the electronic device may 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 to each other via a bus.

[0148] A bus may include a pathway that transfers information between components of a computer system.

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

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

[0151] The memory 800 stores a program for executing the technical solution of the present application, and may also store an operating system and other key services. Specifically, the program may include a program code, and the program code includes a computer operation instruction. More specifically, the memory 800 may 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 storage, a flash, and the like.

[0152] The input device 803 may include a device for receiving 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.

[0153] Output device 804 may include a device that allows information to be output to a user, such as a display screen, printer, speaker, etc.

[0154] The communication interface 802 may include any transceiver or the like to communicate with other devices or communication networks, such as Ethernet, Radio Access Network (RAN), Wireless Local Area Network (WLAN), etc.

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

[0156] Those skilled in the art will understand that Figure 8 The structure shown in the figure is merely a block diagram of a partial structure related to the scheme of the present application, and does not constitute a limitation on the electronic device to which the scheme of the present application is applied. The specific electronic device may include more or fewer components than shown in the figure, or combine certain components, or have a different arrangement of components.

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

[0158] An embodiment of the present application also provides a vehicle, in which the above-mentioned electronic expansion valve opening adjustment device or the above-mentioned electronic device is provided.

[0159] In addition to the above-mentioned methods and devices, an embodiment of the present application proposes a computer program product, which includes computer program instructions, which, when executed by a processor, enable the processor to execute the steps of the electronic expansion valve opening adjustment method according to various embodiments of the present application described in the above-mentioned "Exemplary Method" section of this specification.

[0160] The computer program product may be written in any combination of one or more programming languages ​​to write program codes for performing the operations of the embodiments of the present application, including object-oriented programming languages, such as Java, C++, etc., and conventional procedural programming languages, such as "C" language or similar programming languages. The program code may be executed entirely on the user computing device, partially on the user device, as an independent software package, partially on the user computing device and partially on a remote computing device, or entirely on a remote computing device or server.

[0161] In addition, an embodiment of the present application also proposes a storage medium on which a computer program is stored, and the computer program is executed by a processor to execute the steps of the electronic expansion valve opening adjustment method according to various embodiments of the present application described in the above "Exemplary Method" section of this specification.

[0162] The basic principle of the present invention is described above in conjunction with specific embodiments. However, it should be pointed out that the advantages, strengths, effects, etc. mentioned in the present invention are only examples and not limitations, and it cannot be considered that these advantages, strengths, effects, etc. must be possessed by each embodiment of the present invention. In addition, the specific details disclosed above are only for the purpose of illustration and facilitation of understanding, rather than limitation, and the above details do not limit the present invention to being implemented by adopting the above specific details.

[0163] The block diagrams of the devices, apparatuses, equipment, and systems involved in the present invention are only illustrative examples and are not intended to require or imply that they must be connected, arranged, and configured in the manner shown in the block diagrams. As will be appreciated by those skilled in the art, these devices, apparatuses, equipment, and systems can be connected, arranged, and configured in any manner. Words such as "including", "comprising", "having", etc. are open words, referring to "including but not limited to", and can be used interchangeably with them. The words "or" and "and" used here refer to the words "and / or" and can be used interchangeably with them, unless the context clearly indicates otherwise. The word "such as" used here refers to the phrase "such as but not limited to", and can be used interchangeably with it.

[0164] It should also be noted that in the device, apparatus and method of the present invention, each component or each step can be decomposed and / or reassembled, and such decomposition and / or reassembly should be regarded as an equivalent solution of the present invention.

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

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

[0167] The above description has been given for the purpose of illustration and description. In addition, this description is not intended to limit the embodiments of the present invention to the forms disclosed herein. Although a number of example aspects and embodiments have been discussed above, those skilled in the art will recognize certain variations, modifications, changes, additions and sub-combinations thereof.

Claims

1. A method for adjusting the opening of an electronic expansion valve, characterized in that: Applicable to a thermal management air conditioning system in a dual cooling 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 rate of the refrigerant in the cab cooling, and the second electronic expansion valve is used to adjust the flow rate of the refrigerant in the battery cooling, the method comprises: Determine the cooling level of the cabin based on the vehicle interior temperature and determine the cooling level of the battery based on the battery cell temperature; Adjusting a target superheat degree on the cab side and a target superheat degree on the battery side based on a cooling level of the cab and a cooling level of the battery; The opening degree of the first electronic expansion valve is adjusted based on the cab-side target superheat degree, and the opening degree of the second electronic expansion valve is adjusted based on the battery-side target superheat degree.

2. The method for adjusting the opening of an electronic expansion valve according to claim 1, characterized in that: The cooling level of the cab includes level 1 and level 2, and the determining the cooling level of the cab based on the temperature inside the vehicle includes: If the vehicle interior temperature is less than or equal to a first preset vehicle interior temperature, determining that the cooling level of the cab is level 1; If the vehicle interior temperature increases from less than or equal to the first preset vehicle interior temperature to greater than the first preset vehicle interior temperature and less than or equal to the second preset vehicle interior temperature, determining that the cooling level of the cab is level 1; If the vehicle interior temperature decreases from being greater than the second preset vehicle interior temperature to being greater than the first preset vehicle interior temperature and less than or equal to the second preset vehicle interior temperature, determining that the cooling level of the cab is level 2; If the vehicle interior temperature is greater than the second preset vehicle interior temperature, it is determined that the cooling level of the cab is level 2.

3. The method for adjusting the opening of an electronic expansion valve according to claim 1, characterized in that: The battery cooling level includes level 1 and level 2, and determining the battery cooling level based on the battery cell temperature includes: If the battery cell temperature is less than or equal to the first preset battery cell temperature, determining that the cooling level of the battery is level 1; If the battery cell temperature increases 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 the second preset cell temperature, it is determined that the cooling level of the battery is level 1; If the battery cell temperature decreases from being greater than the second preset battery cell temperature to being greater than the first preset battery cell temperature and less than or equal to the second preset battery cell temperature, determining that the cooling level of the battery is level 2; If the battery cell temperature is greater than the second preset battery cell temperature, it is determined that the cooling level of the battery is level 2.

4. The method for adjusting the opening of an electronic expansion valve according to claim 1, characterized in that: The adjusting the target overheat degree of the cab side and the target overheat degree of the battery side based on the cooling level of the cab and the cooling level of the battery includes: Determining the priority order of cab cooling and battery cooling based on the cab cooling level and the battery cooling level; Based on the priority order, the cab-side target superheat degree and the battery-side target superheat degree are adjusted.

5. The method for adjusting the opening of an electronic expansion valve according to claim 4, characterized in that: The determining the priority order of cab cooling and battery cooling based on the cab cooling level and the battery cooling level includes: If the cooling level of the cab and the cooling level of the battery are both level 1, determining that the cab cooling and the battery cooling have the same priority in the priority order; If the cooling level of the cab and the cooling level of the battery are both level 2, or the cooling level of the cab is level 1 and the cooling level of the battery is level 2, then determining the priority order is that the priority of the battery cooling is higher than the priority of the cab cooling; If the cooling level of the cab is level 2 and the cooling level of the battery is level 1, the priority order is determined to be that the priority of the cab cooling is higher than the priority of the battery cooling.

6. The method for adjusting the opening of an electronic expansion valve according to claim 4, characterized in that: Based on the priority order, adjusting the cab side target overheat degree and the battery side target overheat degree includes: If the cab cooling and the battery cooling have the same priority, adjusting the cab side target superheat based on the vehicle interior temperature and the air conditioning panel setting temperature, and adjusting the battery side target superheat based on the vehicle operating conditions; If the priority of the battery cooling is higher than the priority of the cab cooling, a first preset cab side overheat is determined as the cab side target overheat, a first preset battery side overheat is determined as the battery side target overheat, and the first preset cab side overheat is greater than the first preset battery side overheat; If the priority of the cab cooling is higher than the priority of the battery cooling, the second preset cab side overheat is determined as the cab side target overheat, and the second preset battery side overheat is determined as the battery side target overheat, and the second preset cab side overheat is less than the second preset battery side overheat.

7. The method for adjusting the opening of an electronic expansion valve according to claim 6, characterized in that: The adjusting the target superheat degree of the battery side based on the vehicle operating condition includes: If the vehicle operating condition is a driving operating condition, determining the battery side target superheat degree based on the evaporator surface temperature; If the vehicle operating condition is a charging condition, the battery side target overheat degree is determined based on the battery inlet water temperature.

8. An electronic expansion valve opening adjustment device, characterized in that: Applicable to a thermal management air conditioning system in a dual cooling 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 rate of the refrigerant in the cab cooling, and the second electronic expansion valve is used to adjust the flow rate of the refrigerant in the battery cooling, the device comprises: A determination module, configured to determine a cooling level of the cab based on the temperature inside the vehicle, and to determine a cooling level of the battery based on the temperature of the battery cell; A first adjustment module, configured to adjust a target overheat degree of the cab side and a target overheat degree of the battery side based on a cooling level of the cab and a cooling level of the battery; The second regulating module is used to regulate the opening of the first electronic expansion valve based on the target superheat of the cab side, and to regulate the opening of the second electronic expansion valve based on the target superheat of the battery side.

9. An electronic device, characterized in that: including memory and processor; The memory is connected to the processor and is used to store programs; The processor is used to implement the electronic expansion valve opening adjustment method according to any one of claims 1 to 7 by running the program in the memory.

10. A vehicle, characterized in that: The vehicle is provided with the electronic expansion valve opening adjustment device as claimed in claim 8 or the electronic device as claimed in claim 9.

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