A new energy vehicle thermal management system with three parallel radiators

Abstract

The utility model discloses a new energy vehicle with heat management system of three parallel radiator, including air conditioning system and drive cooling system, air conditioning system includes compressor, condenser and battery package, and the cabin heat exchanger parallel connected with battery package, drive cooling system includes electric drive control cooling system, drive cooling system, water pump and PTC heater, first radiator and second radiator that parallel connection each other, first radiator is located condenser air inlet end one side, and second radiator is located condenser air outlet end one side, and be configured as when air conditioning system is refrigeration mode, the cooling liquid that water pump pumps out flows through second radiator, when heating mode, cooling liquid flows through first radiator. Refrigeration mode second radiator and condenser can not exchange heat, and the condenser air inlet temperature is ambient temperature, guarantees refrigeration mode normal operation, when heating mode, first radiator absorbs the heat of vehicle drive system and PTC heater, and the heat exchange with condenser, improves heating efficiency.

Description

Technical Field

[0001] This utility model relates to the field of vehicle parts technology, and specifically to a thermal management system for new energy vehicles with three parallel radiators. Background Technology

[0002] With the rapid development of new energy vehicle technology, the complexity and importance of vehicle thermal management systems are becoming increasingly prominent. Unlike traditional fuel vehicles, the thermal management of electric vehicles requires the coordinated management of three core needs: cabin air conditioning, battery pack temperature control, and heat dissipation of the electric drive system (motor, electronic control, etc.). Its energy consumption and efficiency directly determine the vehicle's range and reliability. Existing vehicle thermal management systems can effectively regulate the temperature of each subsystem, but they lack unified planning for the energy of the entire vehicle, resulting in low efficiency and waste of usable waste heat. This leads to low heat absorption efficiency of the heat pump system in low-temperature heating mode, making it unable to quickly heat the battery and passenger compartment. Utility Model Content

[0003] One of the objectives of this utility model is to provide a thermal management system for new energy vehicles with three parallel radiators, in order to solve the problem of low heat absorption efficiency of heat pump systems in low-temperature heating mode caused by the waste of available waste heat in vehicles in the prior art.

[0004] To achieve the above objectives, the technical solution adopted by this utility model is as follows: A thermal management system for new energy vehicles with three parallel radiators includes an air conditioning system and a drive cooling system. The air conditioning system includes a compressor, a condenser, and a battery pack forming a loop, as well as a cabin heat exchanger connected in parallel with the battery pack. The drive cooling system includes an electric drive control cooling system, a drive cooling system, a water pump and a PTC heater forming a loop, a first radiator, and a second radiator connected in parallel with the first radiator. The electric drive control cooling system and the drive cooling system are used for cooling the vehicle's drive system. The water pump is used to pump coolant to the first radiator / second radiator. The first radiator is located on the air inlet side of the condenser, and the second radiator is located on the air outlet side of the condenser. The first radiator and the second radiator are configured such that when the air conditioning system is in cooling mode, the coolant pumped by the water pump flows only through the second radiator; when the air conditioning system is in heating mode, the coolant pumped by the water pump flows only through the first radiator.

[0005] Based on the aforementioned technical means, in the cooling mode of the air conditioning system, the second radiator located on the air outlet side of the condenser cannot exchange heat with the condenser, and the condenser intake air temperature is the ambient temperature. This ensures the normal operation of the cooling mode while dissipating the heat generated by the vehicle drive system to the outside. In the heating mode of the air conditioning system (i.e., in a low-temperature environment), the first radiator can absorb the heat generated by the vehicle drive system and the PTC heater and exchange heat with the condenser. After heat exchange, the condenser transfers the heat to the battery pack and passenger compartment, improving the energy utilization efficiency of the heating mode in low-temperature environments. This allows the air conditioning system to quickly heat the vehicle battery and passenger compartment, thus improving the heating efficiency of the air conditioning system.

[0006] Furthermore, the drive cooling system also includes a first solenoid valve and a second solenoid valve; the first solenoid valve is located in the branch where the first radiator is located, and is used to control the flow of coolant through / out of the first radiator; the second solenoid valve is located in the branch where the second radiator is located, and is used to control the flow of coolant through / out of the second radiator.

[0007] According to the above technical means, the first solenoid valve can control the flow of coolant pumped by the water pump to or from the first radiator by opening / closing, and the second solenoid valve can control the flow of coolant pumped by the water pump to or from the second radiator by opening / closing, so as to achieve the purpose of the coolant flowing through the second radiator in the air conditioning system in the cooling mode and the coolant flowing through the first radiator in the heating mode.

[0008] Furthermore, the first solenoid valve is provided on both sides of the first radiator, and / or the second solenoid valve is provided on both sides of the second radiator.

[0009] Based on the above technical means, a first solenoid valve is provided on both sides of the first radiator to ensure effective control of whether the coolant flows through the first radiator; similarly, a second solenoid valve is provided on both sides of the second radiator to ensure effective control of whether the coolant flows through the second radiator.

[0010] Furthermore, the drive cooling system also includes a cooling fan for heat dissipation of the vehicle drive system.

[0011] Based on the above-mentioned technical means, the cooling fan can accelerate airflow, improve the heat dissipation efficiency of the vehicle drive system, and prevent the performance of various components in the vehicle drive system from deteriorating or their lifespan from being shortened due to overheating.

[0012] Furthermore, the vehicle drive system includes a vehicle controller and a motor, the electric drive control cooling system is used for heat dissipation of the vehicle controller; the drive cooling system is used for heat dissipation of the motor.

[0013] Based on the above technical means, the electric drive control cooling system and the drive cooling system dissipate heat for the vehicle controller and the motor respectively, which can ensure that the vehicle controller and the motor are cooled as needed, and avoid insufficient or excessive cooling of the vehicle controller or the motor.

[0014] Furthermore, the air conditioning system also includes a four-way reversing valve, which is installed in the circuit of the air conditioning system and connected in series with the compressor to guide the flow direction of the refrigerant in the air conditioning system circuit.

[0015] Based on the aforementioned technical means, the four-way reversing valve changes the flow direction of refrigerant in the air conditioning system, enabling the air conditioning system to switch between cooling and heating modes. At the same time, when abnormal situations such as high and low pressure imbalance occur in the air conditioning system, the four-way reversing valve can also cut off the refrigerant circuit to prevent damage to the compressor.

[0016] Furthermore, the air conditioning system also includes a first expansion valve and a second expansion valve, which are respectively disposed on two parallel branches where the battery pack and the cabin heat exchanger are located.

[0017] Based on the aforementioned technical means, the first expansion valve and the second expansion valve have the function of controlling the flow rate of refrigerant through the branches where the battery pack and the cabin heat exchanger are located, respectively, to ensure efficient heat exchange between the battery pack and the crew cabin.

[0018] Furthermore, the air conditioning system also includes a third expansion valve, which is located on the branch where the condenser is located.

[0019] Based on the above technical means, the third expansion valve can regulate the refrigerant flow into the condenser (when it acts as an evaporator in the heating mode of the air conditioning system), thereby controlling the evaporation pressure, which in turn enables the compressor to compress the refrigerant efficiently and improve the refrigerant compression efficiency.

[0020] Furthermore, the first expansion valve, the second expansion valve, and the third expansion valve are all electronic expansion valves.

[0021] Based on the aforementioned technical means, the electronic expansion valve has the advantages of being able to accurately regulate the refrigerant flow and quickly respond to changes in the operating conditions of the air conditioning system, enabling the air conditioning system to work quickly and stably after switching between cooling and heating modes, thereby improving the adaptability of the air conditioning system.

[0022] Furthermore, the air conditioning system also includes a blower for blowing air onto the cabin heat exchanger.

[0023] Based on the aforementioned technical means, the blower can not only accelerate the airflow speed around the cabin heat exchanger and improve the heat exchange efficiency of the cabin heat exchanger, but also quickly transfer the heat from the cabin heat exchanger into the passenger compartment, thereby increasing the cooling or heating speed of the passenger compartment.

[0024] The beneficial effects of this utility model are as follows: In the cooling mode of the air conditioning system, the second radiator located on the air outlet side of the condenser cannot exchange heat with the condenser. The condenser intake air temperature is the ambient temperature, ensuring the normal operation of the cooling mode while dissipating the heat generated by the vehicle drive system to the outside. In the heating mode of the air conditioning system (i.e., in a low-temperature environment), the first radiator can absorb the heat generated by the vehicle drive system and the PTC heater and exchange heat with the condenser. After heat exchange, the condenser transfers the heat to the battery pack and passenger compartment, improving the energy utilization efficiency of the heating mode in low-temperature environments. This allows the air conditioning system to quickly heat the vehicle battery and passenger compartment, thus improving the heating efficiency of the air conditioning system. Attached Figure Description

[0025] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0026] Figure 1 This is a schematic diagram of the overall system structure of this utility model; Figure 2 This is a schematic diagram of the operating circuit of the system in cooling mode according to this utility model; Figure 3 This is a schematic diagram of the working circuit of the system in heating mode according to this utility model.

[0027] in, 100. Air conditioning system; 110. Compressor; 120. Condenser; 130. Battery pack; 140. Cabin heat exchanger; 150. Four-way reversing valve; 160. First expansion valve; 170. Second expansion valve; 180. Third expansion valve; 190. Blower; 200. Cooling system; 210. Electric drive control cooling system; 220. Drive cooling system; 230. Water pump; 240. PTC heater; 250. First radiator; 260. Second radiator; 270. First solenoid valve; 280. Second solenoid valve; 290. Cooling fan. Detailed Implementation

[0028] The embodiments of the present invention will be described below with reference to the accompanying drawings and preferred embodiments. The drawings are for illustrative purposes only and should not be construed as limiting the present invention. Those skilled in the art can easily understand other advantages and effects of the present invention from the content disclosed in this specification. The present invention can also be implemented or applied through other different specific embodiments, and various details in this specification can also be modified or changed based on different viewpoints and applications without departing from the spirit of the present invention. It should be understood that the preferred embodiments are only for illustrating the present invention and not for limiting the scope of protection of the present invention.

[0029] It should be noted that the illustrations provided in the following embodiments are only schematic representations of the basic concept of the present invention. Therefore, the drawings only show the components related to the present invention and are not drawn according to the actual number, shape and size of the components in the actual implementation. In the actual implementation, the form, quantity and proportion of each component can be arbitrarily changed, and the layout of the components may also be more complex.

[0030] Example 1 This embodiment provides, as follows: Figures 1 to 3 The diagram illustrates a thermal management system for a new energy vehicle with three parallel radiators, comprising an air conditioning system 100 and a cooling system 200. The air conditioning system 100 includes a compressor 110, a condenser 120, and a battery pack 130 forming a circuit, as well as a cabin heat exchanger 140 connected in parallel with the battery pack 130. The cooling system 200 includes an electric drive-controlled cooling system 210, a drive cooling system 220, a water pump 230, and a PTC heater 240 forming a circuit in series, a first radiator 250, and a second radiator 260 connected in parallel with the first radiator 250. The electric drive-controlled cooling system 210... 10 and drive cooling system 220 are used for heat dissipation of the vehicle drive system; water pump 230 is used to pump coolant to the first radiator 250 / second radiator 260; the first radiator 250 is located on the air inlet side of the condenser 120, and the second radiator 260 is located on the air outlet side of the condenser 120; the first radiator 250 and the second radiator 260 are configured such that: when the air conditioning system 100 is in cooling mode, the coolant pumped by water pump 230 flows only through the second radiator 260; when the air conditioning system 100 is in heating mode, the coolant pumped by water pump 230 flows only through the first radiator 250.

[0031] In this embodiment, the condenser 120 is an air-cooled condenser.

[0032] When the vehicle is started and the air conditioning system needs to be turned on 100% in summer, such as Figure 2As shown in the cooling mode circuit diagram, the first solenoid valve 270 is closed and the second solenoid valve 280 is open, so that the coolant pumped by the water pump 230 flows only through the second radiator 260 and not through the first radiator 250. At this time, the air inlet temperature of the condenser 120 is the ambient temperature, and the second radiator 260 dissipates heat to the outside. In cooling mode, the PTC heater 240 does not heat. When the heating mode of the air conditioning system 100 needs to be activated in winter, such as... Figure 3 As shown in the heating mode circuit diagram, the first solenoid valve 270 is open and the second solenoid valve 280 is closed, so that the coolant pumped by the water pump 230 flows only through the first radiator 250 and not through the second radiator 260. In heating mode, the PTC heater 240 is turned on to heat, and the refrigerant compressed by the compressor 110 flows through the battery pack 130 and the cabin heat exchanger 140 before reaching the condenser 120. At this time, the condenser 120 exchanges heat with the second radiator 260, while the first radiator 250 can absorb the waste heat from the PTC heater 240 and the vehicle drive system, reducing the additional heating demand and thus improving the energy efficiency ratio and heating efficiency of the air conditioning system 100.

[0033] In the cooling mode of the air conditioning system 100, the second radiator 260 located on the side of the condenser outlet cannot exchange heat with the condenser 120. The air inlet temperature of the condenser 120 is the ambient temperature, ensuring the normal operation of the cooling mode while dissipating the heat generated by the vehicle drive system to the outside. In the heating mode of the air conditioning system 100 (i.e., in a low-temperature environment), the first radiator 250 can absorb the heat generated by the vehicle drive system and the PTC heater 240 and exchange heat with the condenser 120. After heat exchange, the condenser 120 transfers the heat to the battery pack 130 and the passenger compartment, improving the energy utilization efficiency of the heating mode in low-temperature environments. This allows the air conditioning system 100 to quickly heat the vehicle battery and passenger compartment, improving the heating efficiency of the air conditioning system 100.

[0034] like Figure 1 As shown, in this embodiment, the cooling system 200 further includes a first solenoid valve 270 and a second solenoid valve 280. The first solenoid valve 270 is located in the branch where the first radiator 250 is located, and is used to control the flow of coolant through / out of the first radiator 250. The second solenoid valve 280 is located in the branch where the second radiator 260 is located, and is used to control the flow of coolant through / out of the second radiator 260. The first solenoid valve 270 can control the flow of coolant pumped by the water pump 230 through or out of the first radiator 250 by opening / closing, and the second solenoid valve 280 can control the flow of coolant pumped by the water pump 230 through or out of the second radiator 260 by opening / closing, so as to achieve the purpose of the air conditioning system 100 having coolant flowing through the second radiator 260 in cooling mode and coolant flowing through the first radiator 250 in heating mode.

[0035] like Figure 1 As shown, in this embodiment, the cooling system 200 further includes a cooling fan 290, which is used for heat dissipation of the vehicle drive system. The cooling fan 290 can accelerate airflow, improve the heat dissipation efficiency of the vehicle drive system, and prevent the performance of various components in the vehicle drive system from deteriorating or their lifespan from being shortened due to overheating.

[0036] like Figure 1 As shown, in this embodiment, the vehicle drive system includes a vehicle controller and a motor. The electric drive control cooling system 210 is used for heat dissipation of the vehicle controller; the drive cooling system 220 is used for heat dissipation of the motor. The electric drive control cooling system 210 and the drive cooling system 220 respectively dissipate heat for the vehicle controller and the motor, ensuring that the vehicle controller and the motor are cooled as needed, and avoiding insufficient or excessive cooling of the vehicle controller or the motor.

[0037] like Figure 1 As shown, in this embodiment, the air conditioning system 100 also includes a four-way reversing valve 150. The four-way reversing valve 150 is disposed in the circuit of the air conditioning system 100 and connected in series with the compressor 110, and is used to guide the flow direction of the refrigerant in the circuit of the air conditioning system 100. By changing the flow direction of the refrigerant in the air conditioning system 100, the four-way reversing valve 150 enables the air conditioning system 100 to switch between cooling mode and heating mode; at the same time, when the air conditioning system 100 experiences abnormal conditions such as high and low pressure imbalance, the four-way reversing valve 150 can also cut off the refrigerant circuit to prevent damage to the compressor 110.

[0038] like Figure 1 As shown, in this embodiment, the air conditioning system 100 further includes a first expansion valve 160 and a second expansion valve 170, which are respectively disposed on two parallel branches where the battery pack 130 and the cabin heat exchanger 140 are located. The first expansion valve 160 and the second expansion valve 170 control the flow rate of refrigerant through the branches where the battery pack 130 and the cabin heat exchanger 140 are located, respectively, to ensure efficient heat exchange between the battery pack 130 and the passenger compartment.

[0039] like Figure 1 As shown, in this embodiment, the air conditioning system 100 also includes a third expansion valve 180, which is disposed on the branch where the condenser 120 is located. The third expansion valve 180 can regulate the refrigerant flow into the condenser 120 (when it acts as an evaporator in the heating mode of the air conditioning system 100), thereby controlling the evaporation pressure, which in turn enables the compressor 110 to efficiently compress the refrigerant and improve the refrigerant compression efficiency.

[0040] like Figure 1As shown, in this embodiment, the first expansion valve 160, the second expansion valve 170, and the third expansion valve 180 are all electronic expansion valves. Electronic expansion valves have the advantages of being able to accurately regulate refrigerant flow and quickly respond to changes in the operating conditions of the air conditioning system 100, enabling the air conditioning system 100 to operate quickly and stably after switching between cooling and heating modes, thereby improving the adaptability of the air conditioning system 100.

[0041] like Figure 1 As shown, in this embodiment, the air conditioning system 100 also includes a blower 190, which is used to blow air onto the cabin heat exchanger 140. The blower 190 can not only accelerate the airflow around the cabin heat exchanger 140 and improve the heat exchange efficiency of the cabin heat exchanger 140, but also quickly transfer the heat from the cabin heat exchanger 140 into the passenger compartment, thereby increasing the cooling or heating rate of the passenger compartment.

[0042] Example 2 This embodiment is another implementation of the first solenoid valve 270 / second solenoid valve 280 in Embodiment 1, and the difference from Embodiment 1 is that: In this embodiment, the first solenoid valve 270 is provided on both sides of the first radiator 250, and / or the second solenoid valve 280 is provided on both sides of the second radiator 260. This ensures that the coolant does not flow through the second radiator 260 / first radiator 250 when the air conditioning system 100 is in cooling / heating mode, and also ensures effective control over whether the coolant flows through the first radiator 250 / second radiator 260 if one of the first solenoid valves 270 / second solenoid valve 280 fails.

[0043] In this embodiment, except for the number of the first solenoid valve 270 / second solenoid valve 280 installed in the coolant circuit, the implementation methods of other components are the same as in embodiment 1.

[0044] Of course, the thermal management system with three parallel radiators for new energy vehicles in Embodiments 1 and 2 can be applied to vehicles to improve the energy efficiency of vehicles.

[0045] Obviously, the above embodiments of this utility model are merely examples for clearly illustrating the present utility model, and are not intended to limit the implementation of the present utility model. Those skilled in the art can make other variations or modifications based on the above description. It is neither necessary nor possible to exhaustively list all possible implementations here. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this utility model should be included within the protection scope of the claims of this utility model.

Claims

1. A thermal management system for new energy vehicles with three parallel radiators, comprising an air conditioning system (100) and a cooling system (200), characterized in that: The air conditioning system (100) includes a compressor (110), a condenser (120) and a battery pack (130) forming a loop, and a cabin heat exchanger (140) connected in parallel with the battery pack (130). The cooling system (200) includes an electric drive control cooling system (210), a drive cooling system (220), a water pump (230), a PTC heater (240), a first radiator (250), and a second radiator (260) connected in parallel with the first radiator (250); the electric drive control cooling system (210) and the drive cooling system (220) are used for cooling the vehicle drive system; the water pump (230) is used to pump coolant to the first radiator (250) / the second radiator (260); the first radiator (250) is located on the air inlet side of the condenser (120), and the second radiator (260) is located on the air outlet side of the condenser (120); The first radiator (250) and the second radiator (260) are configured such that when the air conditioning system (100) is in cooling mode, the coolant pumped by the water pump (230) flows only through the second radiator (260); and when the air conditioning system (100) is in heating mode, the coolant pumped by the water pump (230) flows only through the first radiator (250).

2. A thermal management system for new energy vehicles with three parallel radiators according to claim 1, characterized in that, The cooling system (200) further includes a first solenoid valve (270) and a second solenoid valve (280); the first solenoid valve (270) is located in the branch where the first radiator (250) is located, and is used to control the flow of coolant through / out of the first radiator (250); the second solenoid valve (280) is located in the branch where the second radiator (260) is located, and is used to control the flow of coolant through / out of the second radiator (260).

3. A thermal management system for new energy vehicles with three parallel radiators according to claim 2, characterized in that, The first solenoid valve (270) is provided on both sides of the first radiator (250), and / or the second solenoid valve (280) is provided on both sides of the second radiator (260).

4. A thermal management system for new energy vehicles with three parallel radiators according to claim 1, characterized in that, The cooling system (200) also includes a cooling fan (290) for heat dissipation of the vehicle drive system.

5. A thermal management system for new energy vehicles with three parallel radiators according to claim 1 or 4, characterized in that, The vehicle drive system includes a vehicle controller and a motor. The electric drive control cooling system (210) is used to dissipate heat from the vehicle controller, and the drive cooling system (220) is used to dissipate heat from the motor.

6. A thermal management system for new energy vehicles with three parallel radiators according to claim 1, characterized in that, The air conditioning system (100) also includes a four-way reversing valve (150), which is disposed in the circuit of the air conditioning system (100) and connected in series with the compressor (110) to guide the flow direction of the refrigerant in the circuit of the air conditioning system (100).

7. A thermal management system for new energy vehicles with three parallel radiators according to claim 1, characterized in that, The air conditioning system (100) also includes a first expansion valve (160) and a second expansion valve (170), which are respectively located on two parallel branches of the battery pack (130) and the cabin heat exchanger (140).

8. A thermal management system for new energy vehicles with three parallel radiators according to claim 7, characterized in that, The air conditioning system (100) also includes a third expansion valve (180), which is located on the branch where the condenser (120) is located.

9. A thermal management system for new energy vehicles with three parallel radiators according to claim 8, characterized in that, The first expansion valve (160), the second expansion valve (170) and the third expansion valve (180) are all electronic expansion valves.

10. A thermal management system for new energy vehicles with three parallel radiators according to claim 1, characterized in that, The air conditioning system (100) also includes a blower (190) for blowing air onto the cabin heat exchanger (140).

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