Battery cooling control method, device and equipment for new energy commercial vehicle and storage medium

Abstract

The invention discloses a battery cooling control method, device and equipment for a new energy commercial vehicle and a storage medium, relates to the technical field of cooling control, and discloses a battery cooling control method for the new energy commercial vehicle, which comprises the following steps: acquiring the temperature of an evaporator, the average temperature of a battery pack, a first superheat degree and a second superheat degree; determining a refrigeration demand according to the evaporator temperature and / or the average temperature of the battery pack; the first opening degree of the first electronic expansion valve and / or the second opening degree of the second electronic expansion valve are / is determined according to at least one of the first superheat degree, the second superheat degree and the refrigeration requirement; and when the current time interval is a preset updating interval, the refrigerating capacity is controlled through the heat management controller according to the first opening degree and / or the second opening degree, so that battery cooling control over the new energy commercial vehicle is completed. Accurate distribution and real-time regulation and control of the battery cooling flow of the new energy commercial vehicle under multiple working conditions are achieved, and therefore the safety of battery cooling is improved.

Description

Technical Field

[0001] The present application relates to the field of cooling control technology, and in particular to battery cooling control methods, devices, equipment, and storage media for new energy commercial vehicles. Background Art

[0002] Currently, new energy commercial vehicles widely use large-capacity power batteries as the core energy source in their powertrains. To ensure the safety and stable performance of the power batteries during charging and operation, the battery temperature fluctuation range must be controlled through cooling. At the same time, to enhance the driver's riding comfort, the vehicles are also equipped with air conditioning systems with cooling functions. In new energy commercial vehicles, for considerations of space layout and resource utilization, the battery cooling circuit and the air conditioning refrigeration circuit are typically integrated into the design, using the same electronic compressor and condenser to serve both the battery pack and the air conditioning box assembly. This integrated structure offers significant resource reuse advantages in vehicle thermal management, and therefore is widely used in the industry.

[0003] Based on an integrated structure, traditional technical solutions typically use a thermal expansion valve to regulate the refrigerant flow in the cab air conditioning circuit, while simultaneously using an electronic expansion valve to adjust the refrigerant distribution in the battery cooling circuit, in order to achieve temperature control requirements for different cooling targets. However, due to the large capacity and charging current of the battery packs of new energy commercial vehicles, the entire battery pack requires a large amount of cooling capacity. When cooling both simultaneously, traditional technical solutions cannot dynamically balance the cooling distribution between cab comfort and battery cooling safety. When the battery load is high, the cab room is prone to being too low while the battery has not cooled to the target temperature, which can trigger a battery overtemperature alarm and even trigger the power limit mechanism.

[0004] The above content is only used to assist in understanding the technical solution of this application and does not constitute an admission that the above content is prior art. Summary of the Invention

[0005] The main purpose of this application is to provide a battery cooling control method, device, equipment and storage medium for new energy commercial vehicles, aiming to solve the technical problem of unbalanced cooling distribution when the air conditioner and battery of the new energy commercial vehicle are cooled at the same time, which cannot take into account both the comfort of the cab and the cooling safety of the battery pack.

[0006] To achieve the above objectives, the present application proposes a battery cooling control method for a new energy commercial vehicle. The battery cooling control method for a new energy commercial vehicle is applied to an air conditioning integrated system, wherein the air conditioning integrated system includes a first electronic expansion valve, a second electronic expansion valve, and a thermal management controller. The method includes:

[0007] Obtain the evaporator temperature, battery pack average temperature, first superheat degree, and second superheat degree;

[0008] determining a cooling requirement based on the evaporator temperature and / or the average temperature of the battery pack;

[0009] determining a first opening degree of the first electronic expansion valve and / or a second opening degree of the second electronic expansion valve according to at least one of the first superheat degree, the second superheat degree, and the cooling demand;

[0010] When the current time interval is the preset update interval, the cooling capacity is controlled by the thermal management controller according to the first opening degree and / or the second opening degree to complete the battery cooling control of the new energy commercial vehicle.

[0011] In one embodiment, the step of determining the first opening degree of the first electronic expansion valve and / or the second opening degree of the second electronic expansion valve according to at least one of the first superheat degree, the second superheat degree, and the cooling demand includes:

[0012] Obtaining a first superheat threshold, a second superheat threshold, a first opening value, and a second opening value, wherein the first superheat threshold is smaller than the second superheat threshold, and the first opening value is smaller than the second opening value;

[0013] When the cooling demand is to start cooling, determining whether the first superheat degree is less than the first superheat degree threshold or greater than the second superheat degree threshold;

[0014] When the first superheat degree is less than the first superheat degree threshold, determining the first opening degree and the second opening degree to be a first opening degree value;

[0015] When the first superheat degree is greater than the second superheat degree threshold, the first opening degree and the second opening degree are determined to be a second opening degree value.

[0016] In one embodiment, the step of determining the first opening degree of the first electronic expansion valve and / or the second opening degree of the second electronic expansion valve according to at least one of the first superheat degree, the second superheat degree, and the cooling demand further includes:

[0017] acquiring a third superheat threshold and a fourth superheat threshold, wherein the third superheat threshold is smaller than the fourth superheat threshold, and the third superheat threshold is larger than the second superheat threshold;

[0018] When the cooling demand is to increase cooling of the battery pack, confirming whether the second overheat degree is less than the third overheat degree threshold or greater than the fourth overheat degree threshold;

[0019] When the second superheat degree is less than the third superheat degree threshold, determining the second opening degree to be the first opening degree value;

[0020] When the second superheat degree is greater than the fourth superheat degree threshold, the second opening degree is determined to be a second opening degree value.

[0021] In one embodiment, the step of determining the first opening degree of the first electronic expansion valve and / or the second opening degree of the second electronic expansion valve according to at least one of the first superheat degree, the second superheat degree, and the cooling demand further includes:

[0022] obtaining a fifth superheat threshold and a sixth superheat threshold, wherein the fifth superheat threshold is less than the sixth superheat threshold, the sixth superheat threshold is less than the third superheat threshold, the fifth superheat threshold is less than the first superheat threshold, and the sixth superheat threshold is less than the second superheat threshold;

[0023] When the cooling demand is to increase cockpit cooling, determining whether the second superheat degree is less than the fifth superheat degree threshold or greater than the sixth superheat degree threshold;

[0024] When the second superheat degree is less than the fifth superheat degree threshold, determining the second opening degree to be the first opening degree value;

[0025] When the second superheat degree is greater than the sixth superheat degree threshold, the second opening degree is determined to be a second opening degree value.

[0026] In one embodiment, the step of determining the first opening degree of the first electronic expansion valve and / or the second opening degree of the second electronic expansion valve according to at least one of the first superheat degree, the second superheat degree, and the cooling demand further includes:

[0027] Acquire a third opening value, where the third opening value is smaller than the second opening value;

[0028] When the cooling demand is emergency cooling of the battery pack, the second opening degree is determined to be a third opening degree value.

[0029] In one embodiment, when the cooling demand is emergency cooling of the battery pack, after the step of determining the second opening degree to be a third opening value, the method further includes:

[0030] Acquire a fifth temperature threshold, where the fifth temperature threshold is greater than the second temperature threshold and less than the fourth temperature threshold;

[0031] When the average temperature of the battery pack is less than or equal to a fifth temperature threshold, confirming whether the second overheating degree is less than a third overheating degree threshold or greater than a fourth overheating degree threshold;

[0032] When the second superheat degree is less than the third superheat degree threshold, determining the second opening degree to be the first opening degree value;

[0033] When the second superheat degree is greater than the fourth superheat degree threshold, the second opening degree is determined to be a second opening degree value.

[0034] In one embodiment, the step of determining the cooling requirement based on the evaporator temperature and / or the average temperature of the battery pack includes:

[0035] Acquire a first temperature threshold, a second temperature threshold, a third temperature threshold, and a fourth temperature threshold, wherein the first temperature threshold is less than the third temperature threshold, the third temperature threshold is less than the second temperature threshold, and the second temperature threshold is less than the fourth temperature threshold;

[0036] When the evaporator temperature is less than a first temperature threshold or the battery pack average temperature is greater than or equal to a second temperature threshold, determining that the cooling requirement is to increase battery pack cooling;

[0037] When the evaporator temperature is greater than or equal to a third temperature threshold and the average battery pack temperature is less than a second temperature threshold, determining that the cooling demand is to increase cockpit cooling;

[0038] When the average temperature of the battery pack is greater than or equal to a fourth temperature threshold, it is determined that the cooling requirement is emergency cooling of the battery pack.

[0039] In addition, to achieve the above-mentioned purpose, the present application also proposes a battery cooling control device for a new energy commercial vehicle, the battery cooling control device for a new energy commercial vehicle comprising: a data acquisition module for acquiring an evaporator temperature, an average battery pack temperature, a first degree of superheat, and a second degree of superheat;

[0040] a demand determination module, configured to determine a cooling demand based on the evaporator temperature and / or the average temperature of the battery pack;

[0041] an opening degree determining module, configured to determine a first opening degree of the first electronic expansion valve and / or a second opening degree of the second electronic expansion valve according to at least one of the first superheat degree, the second superheat degree, and the cooling demand;

[0042] The cooling control module is used to control the cooling capacity through the thermal management controller according to the first opening degree and / or the second opening degree when the current time interval is the preset update interval, so as to complete the battery cooling control of the new energy commercial vehicle.

[0043] In addition, to achieve the above-mentioned purpose, the present application also proposes a battery cooling control device for a new energy commercial vehicle, the device comprising: a memory, a processor, and a computer program stored on the memory and executable on the processor, the computer program being configured to implement the steps of the battery cooling control method for a new energy commercial vehicle as described above.

[0044] In addition, to achieve the above-mentioned purpose, the present application also proposes a storage medium, which is a computer-readable storage medium. A computer program is stored on the storage medium. When the computer program is executed by the processor, the steps of the battery cooling control method for the new energy commercial vehicle as described above are implemented.

[0045] In addition, to achieve the above-mentioned purpose, the present application also provides a computer program product, which includes a computer program. When the computer program is executed by a processor, it implements the steps of the battery cooling control method for new energy commercial vehicles as described above.

[0046] One or more technical solutions proposed in this application have at least the following technical effects:

[0047] Due to the use of a joint collection and calculation method based on the evaporator temperature, the average battery pack temperature, the first superheat and the second superheat, after judging the current cooling demand, the thermal management controller is used to control the cooling capacity distribution according to the dynamically determined openings of the first electronic expansion valve and the second electronic expansion valve, thereby forming a dynamic refrigerant flow adjustment path driven by multi-parameter real-time feedback. This technical means solves the problems of unbalanced distribution, untimely response, and control rigidity when the battery pack and the cockpit are cooled at the same time in the existing technology. It enables new energy commercial vehicles to still achieve a dynamic balance control effect with battery cooling priority and air conditioning comfort under complex heat load changes. Compared with the traditional control method based on refrigerant solenoid valves and thermal expansion valves, the system's adaptability, response speed and cooling capacity utilization efficiency are improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0048] The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the present application and, together with the description, serve to explain the principles of the present application.

[0049] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, for ordinary technicians in this field, other drawings can be obtained based on these drawings without any creative work.

[0050] Figure 1 A flowchart of a first embodiment of a battery cooling control method for a new energy commercial vehicle of this application is provided;

[0051] Figure 2 A schematic diagram of the original cooling control system provided in Example 1 of the battery cooling control method for a new energy commercial vehicle of this application;

[0052] Figure 3A schematic diagram of the improved cooling control system provided in Example 1 of the battery cooling control method for a new energy commercial vehicle of this application;

[0053] Figure 4 A flow chart of the second embodiment of the battery cooling control method for a new energy commercial vehicle of this application;

[0054] Figure 5 This is a schematic diagram of the module structure of the battery cooling control device for a new energy commercial vehicle according to an embodiment of the present application;

[0055] Figure 6 This is a schematic diagram of the device structure of the hardware operating environment involved in the battery cooling control method for new energy commercial vehicles in the embodiment of the present application.

[0056] The purpose, features and advantages of this application will be further explained in conjunction with the embodiments and with reference to the accompanying drawings. DETAILED DESCRIPTION

[0057] It should be understood that the specific embodiments described herein are merely used to explain the technical solutions of the present application and are not intended to limit the present application.

[0058] In order to better understand the technical solution of the present application, a detailed description will be given below in conjunction with the accompanying drawings and specific implementation methods.

[0059] The main solution of the embodiment of the present application is: obtaining the evaporator temperature, the average temperature of the battery pack, the first superheat and the second superheat; determining the cooling demand based on the evaporator temperature and / or the average temperature of the battery pack; determining the first opening of the first electronic expansion valve and / or the second opening of the second electronic expansion valve based on the first superheat, the second superheat and at least one of the cooling demand; when the current time interval is the preset update interval, controlling the cooling capacity through the thermal management controller according to the first opening and / or the second opening to complete the battery cooling control of the new energy commercial vehicle.

[0060] In this embodiment, for ease of description, the following description is made with the identification of a battery cooling control device of a new energy commercial vehicle as the execution subject.

[0061] Since the existing technology cannot balance the cooling distribution between cab comfort and battery pack cooling safety when the air conditioner and battery of new energy commercial vehicles are cooled simultaneously, the present application provides a solution. By adopting a joint collection and calculation method based on the evaporator temperature, the average temperature of the battery pack, the first superheat and the second superheat, after judging the current cooling demand, the thermal management controller is used to control the cooling capacity distribution according to the dynamically determined openings of the first electronic expansion valve and the second electronic expansion valve, thereby forming a dynamic refrigerant flow adjustment path driven by real-time feedback of multiple parameters. This technical means solves the problems of unbalanced distribution, untimely response, and control rigidity when the battery pack and the cockpit are cooled simultaneously in the existing technology, so that new energy commercial vehicles can still achieve a dynamic balance control effect with battery cooling priority and air conditioning comfort under complex heat load changes. Compared with the traditional control method based on refrigerant solenoid valves and thermal expansion valves, the system's adaptability, response speed and cooling capacity utilization efficiency are improved.

[0062] It should be noted that the execution subject of this embodiment can be a computing service device with data processing, network communication, and program execution functions, such as a tablet computer, personal computer, mobile phone, etc., or an electronic device capable of performing the above functions, a battery cooling control device for a new energy commercial vehicle, and an air conditioning integration system. The following uses the air conditioning integration system as an example to illustrate this embodiment and the following embodiments.

[0063] Based on this, the embodiment of the present application provides a battery cooling control method for a new energy commercial vehicle, referring to Figure 1 , Figure 1 This is a flow chart of the first embodiment of the battery cooling control method for a new energy commercial vehicle of the present application.

[0064] In this embodiment, the battery cooling control method for a new energy commercial vehicle includes steps S10 to S40:

[0065] Step S10, obtaining the evaporator temperature, the average temperature of the battery pack, the first superheat degree, and the second superheat degree;

[0066] It should be noted that evaporator temperature refers to the real-time temperature of the refrigerant at the evaporator outlet in the cab's air conditioning circuit. Evaporator temperature is typically measured by a temperature sensor located on the evaporator outlet pipe and is used to assess the cooling efficiency of the air conditioning circuit. Lower evaporator temperatures indicate greater cooling output for that branch, while lower temperatures indicate decreased cooling efficiency. Evaporator temperature is a key indicator for determining whether cooling capacity allocation to the cab should be increased or decreased.

[0067] The average battery pack temperature is a temperature indicator calculated by averaging the temperatures of multiple battery cells within the pack. This temperature reflects the overall thermal state of the battery pack and is typically measured using temperature sensors placed at key locations within the pack. Excessively high average pack temperatures can trigger overheating protection or even limit power, making it a top priority in thermal management strategies.

[0068] Additionally, the first superheat value is the difference between the actual refrigerant temperature at the outlet and the corresponding saturation temperature after the refrigerant simultaneously acts on the battery cooler and evaporator during the initial startup phase. In this embodiment, the first superheat value is used during the initial startup phase, when the battery pack temperature and the cabin temperature are close, as a basis for uniformly adjusting the openings of the first expansion valve (EXV1) and the second expansion valve (EXV2), achieving initial control of cooling capacity distribution based on demand.

[0069] In addition, the second superheat is the superheat of the electronic expansion valve EXV2 after cooling for a period of time.

[0070] Reference Figure 2 , Figure 2 This is a schematic diagram of the original cooling control system principle of the first embodiment of the battery cooling control method for new energy commercial vehicles in this application.

[0071] like Figure 2 As shown, the battery pack is connected to a water-cooled plate via a water pipe, which in turn is connected to a battery chiller. A PT temperature measurement point is located at the inlet of the battery chiller. The battery chiller is connected to the HVAC system via an electronic expansion valve. The HVAC system is then connected to the refrigerant solenoid valve via a thermal expansion valve. The refrigerant solenoid valve's outlet is connected to the electronic compressor via a condenser and directly to the electronic compressor. The outlet of the electronic compressor is connected to the battery chiller via one route and to the HVAC system via another. Temperature measurement points T1 and T2, as well as a P pressure measurement point, are also located throughout the system. The thermal expansion valve and refrigerant solenoid valve control the cooling of the battery pack, but the cooling capacity is uncontrollable.

[0072] Air conditioning integrated system is to improve the cooling control system, refer to Figure 3 , Figure 3 This is a schematic diagram of the principle of an improved cooling control system of the first embodiment of the battery cooling control method for new energy commercial vehicles in this application.

[0073] like Figure 3As shown, the battery pack is connected to the water pump through a water pipe, and the water pump is connected to the battery cooler (Chiller). There is a PT temperature measurement point at the inlet of the battery cooler (Chiller). The battery cooler (Chiller) is connected to the air conditioning box assembly (HVAC) through the electronic expansion valve EXV1. The air conditioning box assembly (HVAC) is connected to the condenser through the electronic expansion valve EXV2. The condenser is connected to the electronic compressor. The electronic compressor is connected to the battery cooler (Chiller) and the air conditioning box assembly (HVAC). In the entire system, T1, T2 temperature measurement points and P pressure measurement point are arranged. Compared with Figure 2 Cooling control system, Figure 3 , that is, the improved cooling control system adds an electronic expansion valve EXV2, and replaces the refrigerant solenoid valve with the electronic expansion valve EXV2, and is directly connected to the electronic compressor after the condenser, and Figure 2 The path from the condenser to the electronic compressor is through the refrigerant solenoid valve. The cooling capacity can be controlled by the electronic expansion valve EXV2, which can be combined with subsequent control methods to achieve effective cooling capacity control.

[0074] Step S20, determining a cooling demand based on the evaporator temperature and / or the average temperature of the battery pack;

[0075] It should be noted that the cooling demand refers to the specific cooling capacity demand status of the battery pack and the cab, which is determined based on the evaporator temperature and / or the average temperature of the battery pack, including whether the cooling capacity needs to be increased or decreased, and which demand should be met first.

[0076] It is understood that by analyzing the evaporator temperature and the average battery pack temperature, the current cooling requirements for the battery pack and cab are determined. Cooling requirements may include, but are not limited to, reducing cab cooling capacity, prioritizing battery pack cooling, increasing cab cooling capacity, suspending cab cooling, and restoring balanced cooling between the battery pack and cab.

[0077] In a feasible implementation, step S20 may include steps S21 to S24:

[0078] Step S21, obtaining a first temperature threshold, a second temperature threshold, a third temperature threshold, and a fourth temperature threshold, wherein the first temperature threshold is less than the third temperature threshold, the third temperature threshold is less than the second temperature threshold, and the second temperature threshold is less than the fourth temperature threshold;

[0079] It should be noted that the first temperature threshold is a critical temperature for determining whether the cab cooling capacity is excessive. In this embodiment, the value is 5°C. This threshold is set based on the cab comfort temperature range. When the evaporator temperature is lower than this value, the cab cooling capacity is excessive.

[0080] In addition, the second temperature threshold is a critical temperature for determining whether the battery pack needs to be cooled first. In this embodiment, the second temperature threshold is 45° C. If the battery pack temperature is too high during operation, its performance will be affected.

[0081] In addition, the third temperature threshold is the critical temperature for determining whether the cab requires enhanced cooling. In this embodiment, the value is 12°C. When the evaporator temperature reaches or exceeds this value, it indicates that the cab cooling effect is insufficient and the temperature is too high, and the cooling capacity needs to be increased to improve user comfort.

[0082] In addition, the fourth temperature threshold is the critical temperature for determining whether the battery pack requires emergency cooling. In this embodiment, its value is 48°C. When the average battery pack temperature reaches or exceeds this threshold, if emergency measures are not taken immediately, the battery pack overtemperature alarm or power limit may be triggered, and cooling needs must be prioritized.

[0083] Step S22, when the evaporator temperature is less than a first temperature threshold or the battery pack average temperature is greater than or equal to a second temperature threshold, determining that the cooling demand is to increase battery pack cooling;

[0084] It should be noted that increasing battery pack cooling is a cooling demand state, which means that when the cab cooling is excessive or the battery pack temperature is high, more cooling capacity needs to be allocated to the battery pack. By increasing the refrigerant flow in the battery cooling circuit, the cooling effect on the battery pack is enhanced to ensure that the battery pack temperature is stable within a safe range.

[0085] It can be understood that when any one of the two conditions is met, the cooling demand is determined to be to increase the battery pack cooling: one is that the evaporator temperature is less than the first temperature threshold (5°C), indicating that the cab is overcooled and the cooling capacity is excessive, and the cab cooling capacity can be reduced and allocated to the battery pack; the other is that the average temperature of the battery pack is ≥ the second temperature threshold (45°C), indicating that the battery pack temperature is high and more cooling capacity is urgently needed for cooling.

[0086] Step S23, when the evaporator temperature is greater than or equal to a third temperature threshold and the average temperature of the battery pack is less than a second temperature threshold, determining that the cooling demand is to increase cockpit cooling;

[0087] It should be noted that increasing cabin cooling is another cooling demand state, which means that when the cabin temperature is high and the battery pack temperature is normal, more cooling capacity needs to be allocated to the cabin. By increasing the refrigerant flow in the air-conditioning circuit, the cooling intensity of the cabin is improved and the cabin temperature is quickly reduced.

[0088] It can be understood that when two conditions are met at the same time, the cooling demand is determined to be increased cabin cooling: first, the evaporator temperature is ≥ the third temperature threshold (12°C), indicating that the cabin temperature is too high and the cooling is insufficient; second, the average battery pack temperature is < the second temperature threshold (45°C), indicating that the battery pack temperature is within a safe range and there is no need to prioritize the allocation of cooling capacity.

[0089] Step S24 : When the average temperature of the battery pack is greater than or equal to a fourth temperature threshold, determining that the cooling demand is emergency cooling of the battery pack.

[0090] It should be noted that emergency cooling of the battery pack is a cooling requirement in an emergency situation. When the battery pack temperature reaches an extremely high level (≥48°C), the cab cooling needs to be suspended and all cooling capacity must be concentrated on the battery pack to reduce its temperature as quickly as possible to avoid performance limitations or safety risks caused by overheating.

[0091] It is understandable that when the average temperature of the battery pack is ≥ the fourth temperature threshold (48°C), it means that the battery pack is in an extremely high temperature state and faces the risk of over-temperature alarm or power limitation. At this time, the cooling demand is determined to be emergency cooling of the battery pack, and the cab cooling needs to be suspended, and all cooling capacity is concentrated on cooling the battery pack.

[0092] Step S30, determining a first opening degree of the first electronic expansion valve and / or a second opening degree of the second electronic expansion valve according to at least one of the first superheat degree, the second superheat degree, and the cooling demand;

[0093] It should be noted that the first electronic expansion valve, namely the electronic expansion valve EXV1, is a component that controls the flow of refrigerant entering the battery cooler. Its first opening refers to the degree of opening of the valve (expressed as a percentage). The size of the opening determines the refrigerant flow in the battery cooling circuit, which in turn affects the cooling intensity of the battery cooling.

[0094] In addition, the second electronic expansion valve, namely the electronic expansion valve EXV2, is a component that controls the flow of refrigerant entering the air-conditioning box. Its second opening refers to the degree of opening of the valve (expressed as a percentage). The size of the opening determines the refrigerant flow in the air-conditioning circuit, which in turn affects the cooling intensity of the cab.

[0095] It is understood that the first opening degree of the first electronic expansion valve and / or the second opening degree of the second electronic expansion valve can be calculated and determined based on the first superheat degree, the second superheat degree, and the cooling demand determined in step S20. By accurately calculating the opening degree based on the superheat range and the cooling demand, the refrigerant flow distribution is ensured to match the actual demand, thereby avoiding excess cooling on one side while ensuring sufficient cooling on the other side.

[0096] In a feasible implementation, step S30 may include steps A31 to A34:

[0097] Step A31: obtaining a first superheat threshold, a second superheat threshold, a first opening value, and a second opening value, wherein the first superheat threshold is smaller than the second superheat threshold, and the first opening value is smaller than the second opening value;

[0098] It should be noted that when the power is just turned on, the temperatures near the battery and the air conditioner are similar and can be controlled to have a uniform opening. The opening of the electronic expansion valve EXV is hysteresis-controlled between a first superheat threshold and a second superheat threshold according to the superheat SH. The first superheat threshold is the lower limit of the first superheat range, and in this embodiment, the value is 8. The second superheat threshold is the upper limit of the first superheat range, and in this embodiment, the value is 12.

[0099] Step A32: when the cooling demand is to start cooling, determining whether the first superheat degree is less than the first superheat degree threshold or greater than the second superheat degree threshold;

[0100] It should be noted that startup cooling refers to the initial stage when the battery pack and the cab are cooled at the same time. At this time, the temperatures near the two are similar, the refrigeration system is in the startup operation state, and the opening of electronic expansion valve 1 and electronic expansion valve 2 can be adjusted at the same time.

[0101] It can be understood that when the cooling demand is to start cooling, the thermal management controller detects the current first superheat value and determines whether it exceeds the range of the first superheat threshold (8) to the second superheat threshold (12), specifically, whether the superheat is less than 8 or greater than 12.

[0102] Step A33: when the first superheat degree is less than the first superheat degree threshold, determining the first opening degree and the second opening degree to be a first opening degree value;

[0103] It should be noted that the first opening value is the adjustment amount of the electronic expansion valve opening when the superheat is less than the first superheat threshold, and the value is -5%, that is, the opening is reduced by 5%.

[0104] It can be understood that when the first superheat is less than the first superheat threshold (8), it is determined that the first opening of the first electronic expansion valve (EXV1) and the second opening of the second electronic expansion valve (EXV2) are both adjusted to the first opening value (-5%), that is, the openings of both are reduced by 5%.

[0105] Step A34: When the first superheat degree is greater than the second superheat degree threshold, determine that the first opening degree and the second opening degree are a second opening degree value.

[0106] It should be noted that the second opening value is the adjustment amount of the electronic expansion valve opening when the superheat is greater than the second superheat threshold, and the value is +1%, that is, the opening increases by 1%.

[0107] It can be understood that when the first superheat is greater than the second superheat threshold (12), it is determined that the first opening of the first electronic expansion valve (EXV1) and the second opening of the second electronic expansion valve (EXV2) are both adjusted to the second opening value (+1%), that is, the openings of both are increased by 1%.

[0108] In a feasible implementation, step S30 may include steps B31 to B34:

[0109] Step B31, obtaining a third superheat threshold and a fourth superheat threshold, wherein the third superheat threshold is smaller than the fourth superheat threshold, and the third superheat threshold is larger than the second superheat threshold;

[0110] It should be noted that when the cab cooling capacity is excessive or the battery pack urgently needs additional cooling capacity, the TMS controls the opening of the electronic expansion valve EXV2 through the LIN, with the superheat SH hysteresis set between 15 and 20. The third superheat threshold is the lower limit of the second superheat range, with a value of 15. The fourth superheat threshold is the upper limit of the second superheat range, with a value of 20.

[0111] Step B32: When the cooling demand is to increase battery pack cooling, confirm whether the second overheating degree is less than the third overheating degree threshold or greater than the fourth overheating degree threshold;

[0112] It can be understood that when the cooling demand is to increase the cooling of the battery pack, the thermal management controller detects the current second superheat value and determines whether it exceeds the range of the third superheat threshold (15) to the fourth superheat threshold (20), that is, determines whether the second superheat is <15 or >20.

[0113] Step B33: when the second superheat degree is less than the third superheat degree threshold, determining the second opening degree to be the first opening degree value;

[0114] It can be understood that when the second superheat is less than the third superheat threshold (15), it means that too much refrigerant enters the air-conditioning box, resulting in a low superheat. At this time, the second opening of the second electronic expansion valve (EXV2) is adjusted to the first opening value (-5%), that is, the opening is reduced by 5%, so as to reduce the refrigerant flow entering the air-conditioning box, allocate more refrigerant to the battery cooler, and enhance the cooling of the battery pack.

[0115] Step B34: When the second superheat degree is greater than the fourth superheat degree threshold, determine the second opening degree to be a second opening degree value.

[0116] It can be understood that when the second superheat is greater than the fourth superheat threshold (20), it means that too little refrigerant enters the air-conditioning box, resulting in a high superheat. At this time, the second opening of the second electronic expansion valve (EXV2) is adjusted to the second opening value (+1%), that is, the opening is increased by 1% to appropriately increase the refrigerant flow entering the air-conditioning box (but the battery pack cooling is still prioritized, and only a small adjustment is made).

[0117] In a feasible implementation, step S30 may include steps C31 to C34:

[0118] Step C31, obtaining a fifth superheat threshold and a sixth superheat threshold, wherein the fifth superheat threshold is less than the sixth superheat threshold, the sixth superheat threshold is less than the third superheat threshold, the fifth superheat threshold is less than the first superheat threshold, and the sixth superheat threshold is less than the second superheat threshold;

[0119] It should be noted that when the cab cooling capacity needs to be increased, the TMS controls the opening of the electronic expansion valve EXV2 via the LIN, with the superheat SH hysteresis set between 6 and 10. The fifth superheat threshold is the lower limit of the third superheat range and, in this embodiment, is 6. The sixth superheat threshold is the upper limit of the third superheat range and, in this embodiment, is 10.

[0120] Step C32: when the cooling demand is to increase cockpit cooling, confirm whether the second superheat degree is less than the fifth superheat degree threshold or greater than the sixth superheat degree threshold;

[0121] It can be understood that when the cooling demand is to increase the cooling of the cockpit (i.e., the evaporator temperature is ≥12°C and the average temperature of the battery pack is <45°C), the thermal management controller detects the current second superheat (i.e., the superheat at the air-conditioning box evaporator outlet) and determines whether it exceeds the range of the fifth superheat threshold (6) to the sixth superheat threshold (10), specifically, whether the superheat is <6 or >10.

[0122] Step C33: when the second superheat degree is less than the fifth superheat degree threshold, determining the second opening degree to be the first opening degree value;

[0123] It can be understood that when the second superheat is less than the fifth superheat threshold (6), it means that too much refrigerant has entered the evaporator of the air-conditioning box, resulting in a low superheat. At this time, the second opening of the second electronic expansion valve (EXV2) is adjusted to the first opening value (-5%), that is, the opening is reduced by 5%, so as to reduce the amount of refrigerant entering, so as to promote the superheat to return to the range of 6 to 10, and avoid the liquid refrigerant affecting the system operation.

[0124] Step C34: When the second superheat degree is greater than the sixth superheat degree threshold, determine the second opening degree to be a second opening degree value.

[0125] It can be understood that when the second superheat is greater than the sixth superheat threshold (10), it means that the refrigerant entering the air-conditioning box evaporator is too little, resulting in a high superheat and insufficient cooling efficiency. At this time, the second opening of the second electronic expansion valve (EXV2) is adjusted to the second opening value (+1%), that is, the opening is increased by 1% to increase the amount of refrigerant entering, so as to reduce the superheat to the range of 6 to 10, thereby enhancing the cooling effect of the cockpit.

[0126] Step S40: When the current time interval is the preset update interval, the cooling capacity is controlled by the thermal management controller according to the first opening degree and / or the second opening degree to complete the battery cooling control of the new energy commercial vehicle.

[0127] It should be noted that the current time interval refers to the length of time from the last adjustment of the electronic expansion valve opening to the current preparation for adjustment, and is used to determine whether the adjustment timing has arrived.

[0128] In addition, the preset update interval is a fixed adjustment period set by the thermal management controller, which is 3 seconds in this embodiment, that is, the electronic expansion valve opening is allowed to be updated every 3 seconds. The purpose is to allow the opening adjustment to have enough time to affect the temperature change and avoid system fluctuations due to frequent adjustments.

[0129] It is understood that when the previous time interval reaches the preset update interval (3 seconds), the thermal management controller sends control instructions to the first and / or second electronic expansion valves based on the first and / or second opening degrees, adjusting their opening degrees, thereby controlling the refrigerant flow, achieving cooling capacity distribution, and completing battery cooling control. After completing battery cooling control, when the battery pack and the cab are cooled simultaneously, the cab is not very cold, causing user comfort complaints, and the battery pack overtemperature alarm and power limit affecting user use are no longer affected, thus improving the user experience.

[0130] This embodiment provides a battery cooling control method for a new energy commercial vehicle. By introducing an electronic expansion valve 2 into the thermal management system of the new energy commercial vehicle and adopting an intelligent control strategy based on the evaporator temperature, the average temperature of the battery pack, the first superheat degree, and the second superheat degree, the method solves the technical problem of uncontrollable cooling capacity and the inability to dynamically adjust the cooling capacity to meet the different cooling requirements of the battery pack and the cab in traditional thermal management systems. The method achieves the beneficial effects of improving cooling efficiency, optimizing battery pack and cab temperature control, and enhancing user comfort and vehicle performance.

[0131] Based on the first embodiment of the present application, in the second embodiment of the present application, the same or similar contents as those in the above embodiment 1 can be referred to the above introduction and will not be described in detail later. Figure 4, step S30 of the battery cooling control method for new energy commercial vehicles further includes steps S31 to S32:

[0132] Step S31, obtaining a third opening value, wherein the third opening value is smaller than the second opening value;

[0133] It should be noted that the third opening value is the opening setting value of the second electronic expansion valve (EXV2) when the cooling demand is emergency cooling of the battery pack. In this embodiment, the value is 0%, that is, fully closed.

[0134] Step S32: When the cooling demand is emergency cooling of the battery pack, determine that the second opening is a third opening value.

[0135] It is understood that when the cooling demand is for emergency cooling of the battery pack (i.e., the average battery pack temperature is ≥48°C), the thermal management controller determines the second opening of the second electronic expansion valve (EXV2) to be the third opening value (0%), that is, controlling EXV2 to be completely closed. At this point, all refrigerant no longer enters the air conditioning unit, but enters the battery cooler, and the cooling capacity is concentrated on reducing the battery pack temperature.

[0136] In a feasible implementation manner, after step S32, steps S33 to S36 may be further included:

[0137] Step S33, obtaining a fifth temperature threshold, where the fifth temperature threshold is greater than the second temperature threshold and less than the fourth temperature threshold;

[0138] It should be noted that the fifth temperature threshold, 46°C, is the critical temperature for determining whether the battery pack has returned to normal regulation from emergency cooling. This value is greater than the second temperature threshold (45°C) and less than the fourth temperature threshold (48°C). Its function is to release the emergency state and resume normal regulation of the second electronic expansion valve when the battery pack temperature drops to 46°C or below after emergency cooling, balancing the cooling needs of the battery pack and the cockpit.

[0139] Step S34, when the average temperature of the battery pack is less than or equal to a fifth temperature threshold, confirming whether the second overheating degree is less than a third overheating degree threshold or greater than a fourth overheating degree threshold;

[0140] It can be understood that when the average temperature of the battery pack is ≤46°C (the fifth temperature threshold), it means that the battery pack temperature has dropped to a safe range and the emergency cooling state can be released. At this time, it is necessary to confirm whether the second superheat (based on the refrigerant state of the air-conditioning box evaporator outlet) deviates from the range of the third superheat threshold (15) to the fourth superheat threshold (20), that is, to determine whether the superheat is <15 or >20.

[0141] Step S35, when the second superheat degree is less than the third superheat degree threshold, determining the second opening degree to be the first opening degree value;

[0142] It can be understood that when the second superheat is less than the third superheat threshold (15), it means that too much refrigerant has entered the air-conditioning box, resulting in a low superheat. At this time, the second opening of the second electronic expansion valve (EXV2) is determined to be the first opening value (-5%), that is, the opening is reduced by 5% to reduce the refrigerant flow rate and promote the superheat to return to the range of 15 to 20.

[0143] Step S36: When the second superheat degree is greater than the fourth superheat degree threshold, determining the second opening degree to be a second opening degree value.

[0144] It is understood that when the second superheat is greater than the fourth superheat threshold (20), it indicates that too little refrigerant is entering the air-conditioning box, resulting in a high superheat. At this time, the second opening of the second electronic expansion valve (EXV2) is determined to be the second opening value (+1%), that is, the opening is increased by 1% to increase the refrigerant flow rate, thereby reducing the superheat to within the range of 15 to 20. When the refrigerant is too little during the recovery phase, the second opening is slightly increased to supplement the cooling capacity of the cockpit, ensuring that the superheat returns to a reasonable range, taking into account both cockpit comfort and battery pack safety, and achieving a smooth transition.

[0145] This embodiment provides a battery cooling control method for a new energy commercial vehicle. By completely closing the second electronic expansion valve (EXV2) in the battery pack emergency cooling state, all cooling capacity is concentrated on reducing the battery pack temperature. After the battery pack temperature drops to a safe range, the opening of the second electronic expansion valve (EXV2) is dynamically adjusted to balance the cooling needs of the battery pack and the cockpit. This technical means solves the problems of cockpit overheating and poor user comfort that may occur during emergency cooling of high-temperature battery packs, as well as unreasonable cooling capacity distribution and poor system stability during the recovery phase. It achieves the beneficial effect of ensuring the safety of the battery pack while taking into account the comfort of the cockpit, improving the overall stability of the system and user experience.

[0146] It should be noted that the above examples are only used to understand the present application and do not constitute a limitation on the battery cooling control method for new energy commercial vehicles of the present application. More simple transformations based on this technical concept are all within the scope of protection of the present application.

[0147] This application also provides a battery cooling control device for new energy commercial vehicles, please refer to Figure 5 , the battery cooling control device of the new energy commercial vehicle includes:

[0148] The data acquisition module 10 is used to obtain the evaporator temperature, the average temperature of the battery pack, the first superheat degree, and the second superheat degree;

[0149] a demand determination module 20, configured to determine a cooling demand based on the evaporator temperature and / or the average temperature of the battery pack;

[0150] an opening degree determining module 30, configured to determine a first opening degree of the first electronic expansion valve and / or a second opening degree of the second electronic expansion valve according to at least one of the first superheat degree, the second superheat degree, and the cooling demand;

[0151] The cooling control module 40 is configured to control the cooling capacity through a thermal management controller according to the first opening degree and / or the second opening degree when the current time interval is the preset update interval, so as to complete the battery cooling control of the new energy commercial vehicle.

[0152] The battery cooling control device for a new energy commercial vehicle provided in this application utilizes the battery cooling control method for a new energy commercial vehicle described in the aforementioned embodiments. This device can address the technical issue of unbalanced cooling distribution, which occurs when both the air conditioner and the battery in a new energy commercial vehicle are cooled simultaneously, preventing both cab comfort and battery pack cooling safety from being compromised. Compared to the prior art, the battery cooling control device for a new energy commercial vehicle provided in this application achieves the same beneficial effects as the battery cooling control method for a new energy commercial vehicle described in the aforementioned embodiments. Other technical features of the battery cooling control device for a new energy commercial vehicle are the same as those disclosed in the aforementioned embodiments and are not further elaborated upon here.

[0153] In one embodiment, the opening determination module 30 is further used to obtain a first superheat threshold, a second superheat threshold, a first opening value, and a second opening value, wherein the first superheat threshold is less than the second superheat threshold, and the first opening value is less than the second opening value; when the refrigeration demand is to start refrigeration, determine whether the first superheat is less than the first superheat threshold or greater than the second superheat threshold; when the first superheat is less than the first superheat threshold, determine the first opening and the second opening to be the first opening value; when the first superheat is greater than the second superheat threshold, determine the first opening and the second opening to be the second opening value.

[0154] In one embodiment, the opening determination module 30 is further used to obtain a third overheat threshold and a fourth overheat threshold, the third overheat threshold being less than the fourth overheat threshold, and the third overheat threshold being greater than the second overheat threshold; when the cooling demand is to increase battery pack cooling, confirm whether the second overheat is less than the third overheat threshold or greater than the fourth overheat threshold; when the second overheat is less than the third overheat threshold, determine the second opening to be the first opening value; when the second overheat is greater than the fourth overheat threshold, determine the second opening to be the second opening value.

[0155] In one embodiment, the opening determination module 30 is further configured to obtain a fifth superheat threshold and a sixth superheat threshold, wherein the fifth superheat threshold is less than the sixth superheat threshold, the sixth superheat threshold is less than the third superheat threshold, the fifth superheat threshold is less than the first superheat threshold, and the sixth superheat threshold is less than the second superheat threshold; when the cooling demand is to increase cockpit cooling, confirm whether the second superheat is less than the fifth superheat threshold or greater than the sixth superheat threshold; when the second superheat is less than the fifth superheat threshold, determine the second opening to be the first opening value; and when the second superheat is greater than the sixth superheat threshold, determine the second opening to be the second opening value.

[0156] In one embodiment, the opening determination module 30 is further configured to obtain a third opening value, which is smaller than the second opening value; and when the cooling requirement is emergency cooling of the battery pack, the second opening is determined to be the third opening value.

[0157] In one embodiment, the opening determination module 30 is further used to obtain a fifth temperature threshold, where the fifth temperature threshold is greater than the second temperature threshold and less than the fourth temperature threshold; when the average temperature of the battery pack is less than or equal to the fifth temperature threshold, confirm whether the second overheat is less than the third overheat threshold or greater than the fourth overheat threshold; when the second overheat is less than the third overheat threshold, determine the second opening to be the first opening value; when the second overheat is greater than the fourth overheat threshold, determine the second opening to be the second opening value.

[0158] In one embodiment, the demand determination module 20 is further used to obtain a first temperature threshold, a second temperature threshold, a third temperature threshold and a fourth temperature threshold, the first temperature threshold is less than the third temperature threshold, the third temperature threshold is less than the second temperature threshold, and the second temperature threshold is less than the fourth temperature threshold; when the evaporator temperature is less than the first temperature threshold or the average temperature of the battery pack is greater than or equal to the second temperature threshold, the cooling demand is determined to be increased battery pack cooling; when the evaporator temperature is greater than or equal to the third temperature threshold and the average temperature of the battery pack is less than the second temperature threshold, the cooling demand is determined to be increased cockpit cooling; when the average temperature of the battery pack is greater than or equal to the fourth temperature threshold, the cooling demand is determined to be emergency cooling of the battery pack.

[0159] The present application provides a battery cooling control device for a new energy commercial vehicle. The battery cooling control device for a new energy commercial vehicle includes: at least one processor; and a memory communicatively connected to the at least one processor; wherein the memory stores instructions executable by the at least one processor, and the instructions are executed by the at least one processor so that the at least one processor can execute the battery cooling control method for a new energy commercial vehicle in the above-mentioned embodiment 1.

[0160] Reference below Figure 6 , which shows a schematic structural diagram of a battery cooling control device for a new energy commercial vehicle suitable for implementing an embodiment of the present application. The battery cooling control device for a new energy commercial vehicle in the embodiment of the present application may include, but is not limited to, mobile terminals such as mobile phones, laptop computers, digital broadcast receivers, PDAs (Personal Digital Assistants), PADs (Portable Application Descriptions), PMPs (Portable Media Players), in-vehicle terminals (e.g., in-vehicle navigation terminals), and fixed terminals such as digital TVs and desktop computers. Figure 6 The battery cooling control device for the new energy commercial vehicle shown is merely an example and should not limit the functions and scope of use of the embodiments of the present application.

[0161] like Figure 6 As shown, the battery cooling control device of the new energy commercial vehicle may include a processing device 1001 (such as a central processing unit, a graphics processing unit, etc.), which can perform various appropriate actions and processes according to the program stored in the ROM (Read Only Memory) 1002 or the program loaded from the storage device 1003 to the RAM (Random Access Memory) 1004. In RAM1004, various programs and data required for the operation of the battery cooling control device of the new energy commercial vehicle are also stored. The processing device 1001, ROM1002 and RAM1004 are connected to each other via a bus 1005. An input / output (I / O) interface 1006 is also connected to the bus. Typically, the following systems can be connected to the I / O interface 1006: input devices 1007 including, for example, a touch screen, a touchpad, a keyboard, a mouse, an image sensor, a microphone, an accelerometer, a gyroscope, etc.; output devices 1008 including, for example, a liquid crystal display (LCD), a speaker, a vibrator, etc.; storage devices 1003 including, for example, a magnetic tape, a hard disk, etc.; and communication devices 1009. The communication device 1009 can allow the battery cooling control device of a new energy commercial vehicle to communicate wirelessly or wired with other devices to exchange data. Although the figure shows a battery cooling control device for a new energy commercial vehicle with various systems, it should be understood that it is not required to implement or have all the systems shown. More or fewer systems may be implemented or have alternatively.

[0162] In particular, according to the embodiments disclosed in the present application, the processes described above with reference to the flowcharts can be implemented as computer software programs. For example, the embodiments disclosed in the present application include a computer program product comprising a computer program carried on a computer-readable medium, the computer program comprising program code for executing the method shown in the flowchart. In such an embodiment, the computer program can be downloaded and installed from a network via a communication device, or installed from a storage device 1003, or installed from a ROM 1002. When the computer program is executed by the processing device 1001, the above-mentioned functions defined in the method of the embodiment disclosed in the present application are executed.

[0163] The battery cooling control device for a new energy commercial vehicle provided in this application utilizes the battery cooling control method for a new energy commercial vehicle described in the aforementioned embodiment. This device can address the technical issue of unbalanced cooling distribution, which occurs when both the air conditioner and the battery in a new energy commercial vehicle are cooled simultaneously, preventing both cab comfort and battery pack cooling safety from being compromised. Compared to the prior art, the battery cooling control device for a new energy commercial vehicle provided in this application achieves the same beneficial effects as the battery cooling control method for a new energy commercial vehicle described in the aforementioned embodiment. Other technical features of the battery cooling control device for a new energy commercial vehicle are the same as those disclosed in the aforementioned embodiment and are not further elaborated upon here.

[0164] It should be understood that the various parts disclosed in this application can be implemented using hardware, software, firmware, or a combination thereof. In the description of the above embodiments, specific features, structures, materials, or characteristics can be combined in any one or more embodiments or examples in a suitable manner.

[0165] The above description is merely a specific embodiment of the present application, but the scope of protection of the present application is not limited thereto. Any changes or substitutions that can be easily conceived by a person skilled in the art within the technical scope disclosed in this application should be included in the scope of protection of this application. Therefore, the scope of protection of this application should be based on the scope of protection of the claims.

[0166] The present application provides a computer-readable storage medium having computer-readable program instructions (i.e., a computer program) stored thereon, and the computer-readable program instructions are used to execute the battery cooling control method for the new energy commercial vehicle in the above-mentioned embodiment.

[0167] The computer-readable storage medium provided in this application can be, for example, a USB flash drive, but is not limited to electrical, magnetic, optical, electromagnetic, infrared, or semiconductor systems, systems or devices, or any combination thereof. More specific examples of computer-readable storage media can include, but are not limited to: an electrical connection with one or more wires, a portable computer disk, a hard disk, RAM (Random Access Memory), ROM (Read Only Memory), Erasable Programmable Read Only Memory (Erasable Programmable Read Only Memory or flash memory, EPROM), optical fiber, CD-ROM (CD-Read Only Memory, portable compact disk read-only memory), optical storage device, magnetic storage device, or any suitable combination thereof. In this embodiment, the computer-readable storage medium can be any tangible medium that contains or stores a program that can be used by or in combination with an instruction execution system, system or device. The program code contained on the computer-readable storage medium can be transmitted using any appropriate medium, including but not limited to: wires, optical cables, RF (Radio Frequency), etc., or any suitable combination thereof.

[0168] The computer-readable storage medium may be included in the battery cooling control device of the new energy commercial vehicle; or it may exist independently without being assembled into the battery cooling control device of the new energy commercial vehicle.

[0169] The above-mentioned computer-readable storage medium carries one or more programs. When the above-mentioned one or more programs are executed by the battery cooling control device of the new energy commercial vehicle, the battery cooling control device of the new energy commercial vehicle: obtains the evaporator temperature, the average temperature of the battery pack, the first superheat and the second superheat; determines the cooling demand according to the evaporator temperature and / or the average temperature of the battery pack; determines the first opening of the first electronic expansion valve and / or the second opening of the second electronic expansion valve according to at least one of the first superheat, the second superheat and the cooling demand; when the current time interval is a preset update interval, controls the cooling capacity according to the first opening and / or the second opening through the thermal management controller to complete the battery cooling control of the new energy commercial vehicle.

[0170] The computer program code for performing the operations of the present application can be written in one or more programming languages ​​or a combination thereof, including object-oriented programming languages ​​such as Java, Smalltalk, C++, and conventional procedural programming languages ​​such as "C" or similar programming languages. The program code can be executed entirely on the user's computer, partially on the user's computer, as a separate software package, partially on the user's computer and partially on a remote computer, or entirely on a remote computer or server. In cases involving a remote computer, the remote computer can be connected to the user's computer through any type of network, including a LAN (Local Area Network) or a WAN (Wide Area Network), or can be connected to an external computer (e.g., using an Internet service provider to connect via the Internet).

[0171] The flow charts and block diagrams in the accompanying drawings illustrate the possible architecture, functions and operations of the systems, methods and computer program products according to various embodiments of the present application. In this regard, each box in the flow chart or block diagram can represent a module, program segment or a part of code, and the module, program segment or a part of code contains one or more executable instructions for realizing the specified logical function. It should also be noted that in some alternative implementations, the functions marked in the box can also occur in a different order than that marked in the accompanying drawings. For example, two boxes represented in succession can actually be executed substantially in parallel, and they can sometimes be executed in the opposite order, depending on the functions involved. It should also be noted that each box in the block diagram and / or flow chart, and the combination of the boxes in the block diagram and / or flow chart can be implemented by a dedicated hardware-based system that performs the specified function or operation, or can be implemented by a combination of dedicated hardware and computer instructions.

[0172] The modules described in the embodiments of the present application may be implemented in software or hardware, wherein the name of a module does not necessarily limit the unit itself.

[0173] The computer-readable storage medium provided in this application is a computer-readable storage medium that stores computer-readable program instructions (i.e., a computer program) for executing the battery cooling control method for a new energy commercial vehicle. This computer-readable storage medium can address the technical issue of unbalanced cooling distribution when both the air conditioner and the battery of a new energy commercial vehicle are cooled simultaneously, resulting in an inability to balance cab comfort with battery pack cooling safety. Compared to the prior art, the beneficial effects of the computer-readable storage medium provided in this application are the same as those of the battery cooling control method for a new energy commercial vehicle provided in the aforementioned embodiment, and are not further elaborated here.

[0174] The present application also provides a computer program product, including a computer program, which, when executed by a processor, implements the steps of the battery cooling control method for a new energy commercial vehicle as described above.

[0175] The computer program product provided in this application can address the technical issue of unbalanced cooling distribution when both the air conditioner and the battery are cooled simultaneously in new energy commercial vehicles, resulting in a failure to balance cabin comfort with battery pack cooling safety. Compared to the prior art, the beneficial effects of the computer program product provided in this application are similar to those of the battery cooling control method for new energy commercial vehicles provided in the aforementioned embodiments, and are not further elaborated here.

[0176] The above description is only part of the embodiments of the present application and does not limit the patent scope of the present application. All equivalent structural transformations made by using the contents of the present application specification and drawings under the technical concept of the present application, or direct / indirect application in other related technical fields are included in the patent protection scope of the present application.

Claims

1. A battery cooling control method for a new energy commercial vehicle, characterized in that: The battery cooling control method for a new energy commercial vehicle is applied to an air conditioning integrated system, which includes a first electronic expansion valve, a second electronic expansion valve, and a thermal management controller. The method includes: Obtain the evaporator temperature, battery pack average temperature, first superheat degree, and second superheat degree; determining a cooling requirement based on the evaporator temperature and / or the average temperature of the battery pack; determining a first opening degree of the first electronic expansion valve and / or a second opening degree of the second electronic expansion valve according to at least one of the first superheat degree, the second superheat degree, and the cooling demand; When the current time interval is the preset update interval, the cooling capacity is controlled by the thermal management controller according to the first opening degree and / or the second opening degree to complete the battery cooling control of the new energy commercial vehicle.

2. The method according to claim 1, wherein The step of determining the first opening degree of the first electronic expansion valve and / or the second opening degree of the second electronic expansion valve according to at least one of the first superheat degree, the second superheat degree, and the cooling demand comprises: Obtaining a first superheat threshold, a second superheat threshold, a first opening value, and a second opening value, wherein the first superheat threshold is smaller than the second superheat threshold, and the first opening value is smaller than the second opening value; When the cooling demand is to start cooling, determining whether the first superheat degree is less than the first superheat degree threshold or greater than the second superheat degree threshold; When the first superheat degree is less than the first superheat degree threshold, determining the first opening degree and the second opening degree to be a first opening degree value; When the first superheat degree is greater than the second superheat degree threshold, the first opening degree and the second opening degree are determined to be a second opening degree value.

3. The method according to claim 1, wherein The step of determining the first opening degree of the first electronic expansion valve and / or the second opening degree of the second electronic expansion valve according to at least one of the first superheat degree, the second superheat degree, and the cooling demand further includes: acquiring a third superheat threshold and a fourth superheat threshold, wherein the third superheat threshold is smaller than the fourth superheat threshold, and the third superheat threshold is larger than the second superheat threshold; When the cooling demand is to increase cooling of the battery pack, confirming whether the second overheat degree is less than the third overheat degree threshold or greater than the fourth overheat degree threshold; When the second superheat degree is less than the third superheat degree threshold, determining the second opening degree to be the first opening degree value; When the second superheat degree is greater than the fourth superheat degree threshold, the second opening degree is determined to be a second opening degree value.

4. The method according to claim 1, wherein The step of determining the first opening degree of the first electronic expansion valve and / or the second opening degree of the second electronic expansion valve according to at least one of the first superheat degree, the second superheat degree, and the cooling demand further includes: obtaining a fifth superheat threshold and a sixth superheat threshold, wherein the fifth superheat threshold is less than the sixth superheat threshold, the sixth superheat threshold is less than the third superheat threshold, the fifth superheat threshold is less than the first superheat threshold, and the sixth superheat threshold is less than the second superheat threshold; When the cooling demand is to increase cockpit cooling, determining whether the second superheat degree is less than the fifth superheat degree threshold or greater than the sixth superheat degree threshold; When the second superheat degree is less than the fifth superheat degree threshold, determining the second opening degree to be the first opening degree value; When the second superheat degree is greater than the sixth superheat degree threshold, the second opening degree is determined to be a second opening degree value.

5. The method according to claim 1, wherein The step of determining the first opening degree of the first electronic expansion valve and / or the second opening degree of the second electronic expansion valve according to at least one of the first superheat degree, the second superheat degree, and the cooling demand further includes: Acquire a third opening value, where the third opening value is smaller than the second opening value; When the cooling demand is emergency cooling of the battery pack, the second opening degree is determined to be a third opening degree value.

6. The method according to claim 1, wherein After the step of determining the second opening degree to be a third opening value when the cooling demand is for emergency cooling of the battery pack, the method further includes: Acquire a fifth temperature threshold, where the fifth temperature threshold is greater than the second temperature threshold and less than the fourth temperature threshold; When the average temperature of the battery pack is less than or equal to a fifth temperature threshold, confirming whether the second overheating degree is less than a third overheating degree threshold or greater than a fourth overheating degree threshold; When the second superheat degree is less than the third superheat degree threshold, determining the second opening degree to be the first opening degree value; When the second superheat degree is greater than the fourth superheat degree threshold, the second opening degree is determined to be a second opening degree value.

7. The method according to claim 1, wherein The step of determining the cooling requirement according to the evaporator temperature and / or the average temperature of the battery pack includes: Acquire a first temperature threshold, a second temperature threshold, a third temperature threshold, and a fourth temperature threshold, wherein the first temperature threshold is less than the third temperature threshold, the third temperature threshold is less than the second temperature threshold, and the second temperature threshold is less than the fourth temperature threshold; When the evaporator temperature is less than a first temperature threshold or the battery pack average temperature is greater than or equal to a second temperature threshold, determining that the cooling requirement is to increase battery pack cooling; When the evaporator temperature is greater than or equal to a third temperature threshold and the average battery pack temperature is less than a second temperature threshold, determining that the cooling demand is to increase cockpit cooling; When the average temperature of the battery pack is greater than or equal to a fourth temperature threshold, it is determined that the cooling requirement is emergency cooling of the battery pack.

8. A battery cooling control device for a new energy commercial vehicle, characterized in that: The device comprises: A data acquisition module is used to obtain the evaporator temperature, the average temperature of the battery pack, the first superheat degree, and the second superheat degree; a demand determination module, configured to determine a cooling demand based on the evaporator temperature and / or the average temperature of the battery pack; an opening degree determining module, configured to determine a first opening degree of the first electronic expansion valve and / or a second opening degree of the second electronic expansion valve according to at least one of the first superheat degree, the second superheat degree, and the cooling demand; The cooling control module is used to control the cooling capacity through the thermal management controller according to the first opening degree and / or the second opening degree when the current time interval is the preset update interval, so as to complete the battery cooling control of the new energy commercial vehicle.

9. A battery cooling control device for a new energy commercial vehicle, characterized in that: The device includes: a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein the computer program is configured to implement the steps of the battery cooling control method for a new energy commercial vehicle according to any one of claims 1 to 7.

10. A storage medium, characterized in that: The storage medium is a computer-readable storage medium, and a computer program is stored on the storage medium. When the computer program is executed by a processor, the steps of the battery cooling control method for a new energy commercial vehicle according to any one of claims 1 to 7 are implemented.

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