New energy automobile air conditioner-battery liquid cooling system and automobile

Abstract

The utility model discloses a new energy automobile air conditioner-battery liquid cooling system and an automobile. The system comprises an air conditioner liquid cooling circulation loop, a battery liquid cooling circulation loop and a cooling water circulation loop, each of the air conditioner liquid cooling circulation loop and the battery liquid cooling circulation loop comprises a compressor and a condenser, and a refrigerant output end of the compressor is connected with a refrigerant input end of the condenser; a refrigerant output end of the condenser is connected to a refrigerant input end of the compressor through a refrigerant pipeline of the refrigerator to form a battery liquid cooling circulation loop; a cooling water pipeline of the refrigerator is sequentially connected with the battery module and the battery water pump in series to form a cooling water circulation loop; the refrigerant output end of the condenser is connected to the refrigerant input end of the compressor through the evaporator to form an air conditioner liquid cooling circulation loop. According to the system, reasonable distribution of the refrigerating capacity of the air conditioner is achieved while the requirements for air conditioner refrigeration and battery heat dissipation in the cockpit are met, and the utilization rate of refrigeration resources of the whole vehicle is increased.

Description

Technical Field

[0001] The utility model belongs to the field of new energy vehicles. Specifically, the utility model relates to a new energy vehicle air conditioning-battery liquid cooling system and a vehicle. Background Art

[0002] Air conditioning is a crucial accessory for new energy vehicles, and its energy management is a key research topic. Especially in summer, air conditioning systems not only regulate the cabin temperature for driving comfort but also, in some cases, regulate the battery cooling circuit to ensure charging efficiency.

[0003] A reference document (CN118936951A) provides a hybrid vehicle air conditioning refrigeration performance testing system and method. The system includes a front-row face temperature sensor, a second-row face temperature sensor, a front-row face wind speed sensor, a second-row face wind speed sensor, a front-row air outlet temperature sensor, a second-row air outlet temperature sensor, a compressor voltage sensor, a compressor current sensor, a battery pack bus voltage sensor, a battery pack bus current sensor, an air conditioning system pressure sensor, a data collector, and a host computer. Each sensor is electrically connected to the data collector, which is electrically connected to the vehicle's OBD interface and the host computer. The present invention establishes more reasonable air conditioning refrigeration test conditions for hybrid vehicles, ensuring that test results can more accurately represent refrigeration performance, more fully verify the combined refrigeration performance of the battery pack and passenger compartment, and maximize the user's actual usage habits and driving conditions.

[0004] However, the above-mentioned comparative documents do not involve the energy distribution between the air-conditioning cooling capacity used for air-conditioning in the cockpit and the air-conditioning cooling capacity used for battery heat dissipation. It is impossible to efficiently utilize the cooling resources of the entire vehicle, resulting in resource waste. Utility Model Content

[0005] The present invention aims to overcome the deficiencies of the prior art and proposes a new energy vehicle air conditioning-battery liquid cooling system and vehicle to achieve the following objectives: through the system of the present application, while meeting the needs of air conditioning cooling and battery heat dissipation in the cockpit, a reasonable distribution of air conditioning cooling capacity is achieved, thereby improving the utilization rate of the vehicle's cooling resources.

[0006] In order to achieve the above-mentioned purpose, the technical solution adopted by the utility model is: a new energy vehicle air-conditioning-battery liquid cooling system, the system includes an air-conditioning liquid cooling circulation loop, a battery liquid cooling circulation loop, and a cooling water circulation loop, the air-conditioning liquid cooling circulation loop and the battery liquid cooling circulation loop include common parts: a compressor and a condenser, wherein the refrigerant output end of the compressor is connected to the refrigerant input end of the condenser; the refrigerant output end of the condenser is connected to the refrigerant input end of the compressor through the refrigerant pipeline of the refrigerator to form a battery liquid cooling circulation loop; the cooling water pipeline of the refrigerator is connected in series with the battery module and the battery water pump in sequence to form a cooling water circulation loop; the refrigerant output end of the condenser is also connected to the refrigerant input end of the compressor through an evaporator to form an air-conditioning liquid cooling circulation loop.

[0007] Preferably, the system further includes a vehicle controller, which is connected to the compressor and the battery water pump respectively, and is used to control the operation of the air conditioning liquid cooling circulation loop, the battery liquid cooling circulation loop, and the cooling water circulation loop.

[0008] Preferably, in the air-conditioning liquid cooling circulation loop, a stop valve is connected in series between the refrigerant output end of the condenser and the refrigerant input end of the evaporator, and the control end of the stop valve is connected to the vehicle controller.

[0009] Preferably, in the battery liquid cooling circulation loop, an electromagnetic expansion valve is connected in series between the refrigerant output end of the condenser and the refrigerant pipeline input end of the refrigerator, and the control end of the electromagnetic expansion valve is connected to the vehicle controller.

[0010] Preferably, the system further includes an air conditioning switch and a BMS, and both the air conditioning switch and the BMS are connected to the vehicle controller.

[0011] Preferably, the system is further equipped with a blower for each of the condenser and the evaporator, for accelerating the blowing of hot air around the condenser to outside the cockpit, or accelerating the blowing of cold air around the evaporator into the cockpit.

[0012] At the same time, the present application also proposes a vehicle, which includes the above-mentioned new energy vehicle air-conditioning-battery liquid cooling system.

[0013] The technical effects of the utility model are:

[0014] (1) The air conditioning liquid cooling circulation circuit, battery liquid cooling circulation circuit, and cooling water circulation circuit provided in this application simultaneously meet the needs of air conditioning cooling and battery heat dissipation in the driving layer.

[0015] (2) This application uses a vehicle controller to control the compressor, battery water pump, stop valve, electromagnetic expansion valve, etc., thereby improving the automation level of the system. At the same time, through flexible control of the two working conditions of air conditioning cooling and battery heat dissipation in the cockpit, it realizes the reasonable distribution of air conditioning cooling capacity and improves the utilization rate of the vehicle's cooling resources.

[0016] (3) The system of the present application further integrates the status monitoring information of new energy vehicles such as air-conditioning switches and BMS, so that according to the status monitoring information of new energy vehicles, especially the battery status information collected by BMS, higher-precision control of the air-conditioning cooling and battery heat dissipation in the cockpit can be achieved, thereby further improving the utilization rate of the vehicle's cooling resources while meeting the user's cooling needs. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 This is a structural diagram of a new energy vehicle air conditioning-battery liquid cooling system according to an embodiment of the present utility model. DETAILED DESCRIPTION

[0018] The following is a further detailed description of the specific implementation of the present invention through the description of the embodiments with reference to the accompanying drawings, with the aim of helping those skilled in the art to have a more complete, accurate and in-depth understanding of the utility model concept and technical solution of the present invention, and to facilitate its implementation. It should be noted that the "connection" described in this application includes both the process of connecting a power supply, electrical equipment or electronic equipment to a power supply or to other electrical equipment to form communication by wired or wireless means; and includes the connection between pipelines for carrying liquids or gases such as cooling water and refrigerants. In order to make the technical solution of the present invention clearer, the present invention is explained through the following embodiments.

[0019] This embodiment proposes a new energy vehicle air conditioning-battery liquid cooling system, such as Figure 1 As shown, the system includes an air-conditioning liquid cooling circulation loop, a battery liquid cooling circulation loop, and a cooling water circulation loop. The air-conditioning liquid cooling circulation loop and the battery liquid cooling circulation loop include common parts: a compressor and a condenser, wherein the refrigerant output end of the compressor is connected to the refrigerant input end of the condenser; the refrigerant output end of the condenser is connected to the refrigerant input end of the compressor through the refrigerant pipeline of the chiller to form a battery liquid cooling circulation loop; the cooling water pipeline of the chiller is connected in series with the battery module and the battery water pump in sequence to form a cooling water circulation loop; the refrigerant output end of the condenser is also connected to the refrigerant input end of the compressor through an evaporator to form an air-conditioning liquid cooling circulation loop.

[0020] Specifically, the compressor acts as a power source, compressing low-temperature, low-pressure gaseous refrigerant to a high-temperature, high-pressure state, thereby powering the refrigerant's circulation. The condenser, on the other hand, cools and condenses the high-temperature, high-pressure gaseous refrigerant output by the compressor into a liquid state, releasing heat into the air. This process reduces both the pressure and temperature of the refrigerant, achieving a cooling effect. The cooled refrigerant output by the condenser further circulates through the air conditioning liquid cooling circuit and / or the battery liquid cooling circuit.

[0021] The battery liquid cooling circulation loop of this embodiment is used to dissipate heat for new energy vehicle batteries. Among them, cooling water is produced by a refrigerator to cool the battery. The refrigerator includes a refrigerant pipeline and a cooling water pipeline. The refrigerator can cool the cooling water pipeline by the refrigerant flowing in the refrigerant pipeline to obtain cooling water. The cooling water is pushed by the battery water pump to circulate in the cooling water circulation loop. The battery module refers to a device used for battery heat dissipation, which is usually a shell wrapped around the battery. A cooling water pipeline is provided on the shell to take away the heat of the battery through the flow of cooling water. Among them, the cooling water pipeline is often bent and wound to maximize the heat dissipation area of ​​the battery.

[0022] The air conditioning liquid cooling circuit of this embodiment is used to provide cooling air to the cockpit. The flowing liquid low-temperature refrigerant boils into vapor in the evaporator, absorbing heat from the air in the cockpit during the process, thereby reducing the ambient temperature in the cockpit.

[0023] To improve the controllability and automation of the air conditioning and battery liquid cooling system, the system of this embodiment also includes a vehicle controller, which is connected to the compressor and battery water pump, respectively, to automatically control the operation of the air conditioning liquid cooling circuit, the battery liquid cooling circuit, and the cooling water circuit. The vehicle controller can automatically start and stop the compressor or battery water pump based on user needs to control the start and stop of the air conditioning and battery liquid cooling system. For example, when active battery cooling is not needed, the water pump can be turned off, thereby rationally allocating the cooling capacity of the vehicle's air conditioning and improving the utilization of the vehicle's cooling resources.

[0024] However, after shutting down the compressor, both the air conditioning and battery cooling circuits cease operation. Even if the battery water pump is turned on, the chiller cannot obtain cooling water, effectively cooling the battery. Therefore, this embodiment provides more sophisticated control devices, namely a shutoff valve and a solenoid expansion valve (EXV), to achieve more precise control of the air conditioning and battery cooling circuits. This allows for flexible selection of cockpit air conditioning cooling, battery cooling, or both, depending on demand.

[0025] Specifically, in the air conditioner liquid cooling circuit, a shutoff valve is connected in series between the refrigerant output of the condenser and the refrigerant input of the evaporator, and the control end of the shutoff valve is connected to the vehicle controller. Similarly, in the battery liquid cooling circuit, an electromagnetic expansion valve is connected in series between the refrigerant output of the condenser and the refrigerant line input of the refrigerator, and the control end of the electromagnetic expansion valve is connected to the vehicle controller.

[0026] The shut-off valve and the electromagnetic expansion valve are both controlled by the vehicle controller. The shut-off valve and the electromagnetic expansion valve each control the on-off of a liquid cooling circulation loop, thereby flexibly allocating the cooling capacity of the air conditioner and improving the utilization rate of the vehicle's cooling resources.

[0027] In order to further improve the system control effect and enhance the degree of automation of new energy vehicles, the system of this embodiment also includes an air-conditioning switch and a BMS (battery management system). Both the air-conditioning switch and the BMS are connected to the vehicle controller. Thus, the vehicle controller can flexibly control the start and stop of the shut-off valve and the electromagnetic expansion valve, and even the opening degree, according to the status of the air-conditioning switch in the cockpit and the battery status monitored by the BMS, thereby achieving higher-precision control.

[0028] For example, if the BMS detects that the battery temperature is above the preset charging temperature threshold while the vehicle is charging, or if the BMS detects that the battery temperature is above the preset overheat protection temperature threshold after the vehicle is high-voltage, or if the air conditioning switch is not on but the BMS issues a cooling request, the vehicle controller can control the shutoff valve to close. If the BMS issues a cooling request and the battery water pump is on, the vehicle controller can control the solenoid expansion valve to open. If the battery water pump fails or is off, or if the shutoff valve is open and there is no cooling request from the BMS, the vehicle controller can control the solenoid expansion valve to close.

[0029] In this embodiment, in order to improve the working efficiency of the system, the system is further equipped with a blower for the condenser and evaporator respectively, which is used to speed up the blowing of hot air around the condenser to the outside of the cockpit, or speed up the blowing of cold air around the evaporator into the cockpit.

[0030] At the same time, the present application also proposes a vehicle, which includes the above-mentioned new energy vehicle air-conditioning-battery liquid cooling system.

[0031] The above description of the present invention is provided as an example, in conjunction with the accompanying drawings. Obviously, the specific implementation of the present invention is not limited to the above-described method. Any non-substantial improvements made using the method concepts and technical solutions of the present invention, or any application of the above-described concepts and technical solutions of the present invention to other situations without modification, are all within the scope of protection of the present invention.

Claims

1. A new energy vehicle air conditioning-battery liquid cooling system, characterized by: The system includes an air-conditioning liquid cooling circulation loop, a battery liquid cooling circulation loop, and a cooling water circulation loop. The air-conditioning liquid cooling circulation loop and the battery liquid cooling circulation loop include common parts: a compressor and a condenser, wherein the refrigerant output end of the compressor is connected to the refrigerant input end of the condenser; the refrigerant output end of the condenser is connected to the refrigerant input end of the compressor through the refrigerant pipeline of the refrigerator to form a battery liquid cooling circulation loop; the cooling water pipeline of the refrigerator is connected in series with the battery module and the battery water pump in sequence to form a cooling water circulation loop; the refrigerant output end of the condenser is also connected to the refrigerant input end of the compressor through an evaporator to form an air-conditioning liquid cooling circulation loop.

2. The new energy vehicle air conditioning-battery liquid cooling system according to claim 1, characterized in that: The system also includes a vehicle controller, which is connected to the compressor and the battery water pump respectively, and is used to control the operation of the air conditioning liquid cooling circulation loop, the battery liquid cooling circulation loop, and the cooling water circulation loop.

3. The new energy vehicle air conditioning-battery liquid cooling system according to claim 2, characterized in that: In the air-conditioning liquid cooling circulation loop, a stop valve is connected in series between the refrigerant output end of the condenser and the refrigerant input end of the evaporator, and a control end of the stop valve is connected to the vehicle controller.

4. A new energy vehicle air conditioning-battery liquid cooling system according to claim 2 or 3, characterized in that: In the battery liquid cooling circulation loop, an electromagnetic expansion valve is connected in series between the refrigerant output end of the condenser and the refrigerant pipeline input end of the refrigerator, and the control end of the electromagnetic expansion valve is connected to the vehicle controller.

5. The new energy vehicle air conditioning-battery liquid cooling system according to claim 4, characterized in that: The system further includes an air conditioning switch and a BMS, and both the air conditioning switch and the BMS are connected to the vehicle controller.

6. The new energy vehicle air conditioning-battery liquid cooling system according to claim 5, characterized in that: The system is further provided with a blower for each of the condenser and the evaporator, for accelerating the blowing of hot air around the condenser to the outside of the cockpit, or accelerating the blowing of cold air around the evaporator into the cockpit.

7. A vehicle, characterized in that: The vehicle includes a new energy vehicle air conditioning-battery liquid cooling system according to any one of claims 1-6.

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