Thermal management system with battery heat recovery and vehicle

Abstract

This invention relates to the field of vehicle thermal management technology, providing a thermal management system and vehicle with battery heat recovery. The system includes an air conditioning unit and a thermal management unit. The air conditioning unit consists of a gas-liquid separator, a compressor, a four-way reversing valve, a condenser, a first throttling device, and an evaporator connected sequentially via a first pipe. The evaporator is connected to the gas-liquid separator via the four-way reversing valve. The thermal management unit consists of a liquid storage device, a pumping device, and a heat exchange device connected sequentially via a second pipe. The heat exchange device is also connected to the gas-liquid separator and the evaporator via a third pipe. When the temperature is low, the heat generated by the vehicle's battery heats the heat exchange liquid in the heat exchange device. The heated heat exchange liquid is then added to the heat exchange liquid circulation of the air conditioning unit, thereby utilizing the heat generated by the battery to raise the temperature of the vehicle interior. When the temperature is high, the air conditioning unit can cool the vehicle interior and the heat exchange device through the heat exchange liquid circulation, thereby cooling the battery.

Description

Technical Field

[0001] This invention relates to the field of vehicle thermal management technology, and more particularly to a thermal management system and vehicle with battery heat recovery. Background Technology

[0002] Existing new energy vehicles (such as new energy rapid transit vehicles) include equipment such as power batteries, air conditioning units, and battery thermal management units. The air conditioning unit is mainly used to regulate the interior temperature of the vehicle, such as the passenger compartment. In low temperatures (such as winter), the air conditioning unit needs to heat the passenger compartment to ensure passenger comfort. The battery thermal management unit typically includes a water-cooled radiator and a fan. It dissipates the heat generated by the power battery into the environment through heat exchange via circulating heat exchange fluid. However, this heat is not fully utilized and is wasted.

[0003] Based on the configuration and characteristics of the aforementioned vehicles, there is an urgent need for a battery heat recovery system that can recover the heat generated by the power battery and use it to heat the interior of the vehicle. Summary of the Invention

[0004] This invention provides a thermal management system and vehicle with battery heat recovery, which solves the defect in the prior art that the heat generated by the power battery is not fully utilized and is wasted and lost, and realizes the use of the heat generated by the power battery to heat the interior of the vehicle when the temperature is low.

[0005] This invention provides a thermal management system with battery heat recovery, comprising: an air conditioning unit, a thermal management unit, and a third pipeline;

[0006] The air conditioning unit includes a compressor, a ventilation device, a condensing device, a first throttling device, a four-way reversing valve, and a gas-liquid separator. The gas-liquid separator, the compressor, and the first port of the four-way reversing valve are connected in sequence through a first pipe. The second port of the four-way reversing valve, the condensing device, the first throttling device, the ventilation device, and the fourth port of the four-way reversing valve are connected in sequence through the first pipe. The third port of the four-way reversing valve is connected to the gas-liquid separator through the first pipe, forming a circuit for adjusting the outlet air temperature of the ventilation device.

[0007] One end of the third pipe is connected to the first pipe between the gas-liquid separator and the four-way reversing valve, and the connection point is the first end point; the other end of the third pipe is connected to the first pipe between the ventilation device and the first throttling device, and the connection point is the second end point.

[0008] The thermal management unit includes a liquid storage device, a pumping device, and a heat exchange device; the liquid storage device and the pumping device are connected through a second pipe and form a circuit for cooling the battery; a portion of the heat exchange device is installed on the second pipe, and a portion is installed on the third pipe.

[0009] According to the present invention, a thermal management system with battery heat recovery is provided, wherein a first valve is installed on a third pipe between the heat exchange device and the first endpoint, and a second valve is installed on the third pipe between the heat exchange device and the second endpoint.

[0010] According to the present invention, a thermal management system with battery heat recovery is provided, wherein a first branch pipe is provided on the third pipe between the second valve and the heat exchange device, the first branch pipe is connected to the first pipe between the first throttling device and the condensing device, and a third valve is installed on the first branch pipe.

[0011] According to the present invention, a thermal management system with battery heat recovery is provided, wherein a second branch pipe is provided on the second pipe between the first valve and the heat exchange device, and the second branch pipe is connected to the first pipe between the four-way reversing valve and the ventilation device; a fourth valve is installed on the second branch pipe.

[0012] A thermal management system with battery heat recovery provided by the present invention further includes a flow control module, the flow control module including a fourth pipe and a flow regulating valve; one end of the fourth pipe is connected to the first pipe between the four-way reversing valve and the condensing device, and the other end is connected to the first pipe between the four-way reversing valve and the ventilation device; the flow regulating valve is installed on the fourth pipe.

[0013] According to the present invention, a thermal management system with battery heat recovery is provided, wherein the flow control module further includes a fifth valve, the fifth valve being installed on the first pipe between the four-way reversing valve and the condensing device, and located between the four-way reversing valve and the fourth pipe.

[0014] According to the present invention, a thermal management system with battery heat recovery is provided, wherein a one-way valve is installed on the first pipe between the compressor and the four-way reversing valve to prevent liquid in the first pipe from flowing from the four-way reversing valve to the compressor.

[0015] According to the present invention, a thermal management system with battery heat recovery is provided, wherein a second throttling device is installed on the third pipe between the heat exchange device and the first branch pipe.

[0016] According to the present invention, a thermal management system with battery heat recovery is provided, wherein at least one filter device is installed on the third pipe.

[0017] The present invention also provides a vehicle comprising any of the above-described thermal management systems having battery heat recovery.

[0018] The present invention provides a thermal management system and vehicle with battery heat recovery, including an air conditioning unit and a thermal management unit. The air conditioning unit includes a compressor, a ventilation device, a condensing device, a first throttling device, an evaporator, a four-way reversing valve, and a gas-liquid separator. The gas-liquid separator, compressor, four-way reversing valve, condensing device, first throttling device, and evaporator are sequentially connected through a first pipe. The evaporator is connected to the gas-liquid separator through the four-way reversing valve, forming a loop for regulating the ventilation temperature of the ventilation device. The thermal management unit includes a liquid storage device, a pumping device, and a heat exchange device. The liquid storage device, pumping device, and heat exchange device are sequentially connected through a second pipe, forming a loop for cooling the battery. The heat exchange device is also connected to the gas-liquid separator and evaporator through a third pipe. The heat generated by the vehicle's battery heats the heat exchange liquid in the heat exchange device. The heated heat exchange liquid is added to the heat exchange liquid circulation of the air conditioning unit, realizing the use of the heat generated by the battery to raise the temperature of the vehicle interior and reducing the loss and waste of battery heat. Attached Figure Description

[0019] To more clearly illustrate the technical solutions in this invention 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 some embodiments of this invention. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0020] Figure 1 This is a schematic diagram of the thermal management system with battery heat recovery provided by the present invention;

[0021] Figure 2 This is a schematic diagram of the operation of the thermal management system with battery heat recovery under operating condition 1 in the embodiment of the present invention;

[0022] Figure 3 This is a schematic diagram of the operation of the thermal management system with battery heat recovery under operating condition 2 in this embodiment of the invention;

[0023] Figure 4 This is a schematic diagram of the operation of the thermal management system with battery heat recovery under operating condition 3 in the embodiment of the present invention;

[0024] Figure 5 This is a schematic diagram of the operation of the thermal management system with battery heat recovery under operating condition 4 in the embodiment of the present invention;

[0025] Figure 6 This is a schematic diagram of the operation of the thermal management system with battery heat recovery under operating condition 5 in this embodiment of the invention;

[0026] Figure 7 This is a schematic diagram of the operation of the thermal management system with battery heat recovery under operating condition 6 in the embodiment of the present invention;

[0027] Figure 8 This is a schematic diagram of the operation of the thermal management system with battery heat recovery under operating condition 7 in this embodiment of the invention.

[0028] Figure label:

[0029] 1. First piping; 2. Thermal management unit; 3. Third piping; 4. Flow control module; 5. Second throttling device; 6. Filter device; 7. Battery; 12. Compressor; 13. Four-way reversing valve; 14. Condensation device; 15. First throttling device; 16. Ventilation device; 17. Gas-liquid separator; 18. Check valve; 21. Pumping device; 22. Liquid storage device; 23. Heat exchange device; 24. Second piping; 31. First valve; 32. Second valve; 33. Third valve; 34. Fourth valve; 41. Fourth piping; 42. Flow regulating valve; 43. Fifth valve. Detailed Implementation

[0030] To make the objectives, technical solutions, and advantages of this invention clearer, the technical solutions of this invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this invention. All other embodiments obtained by those skilled in the art based on the embodiments of this invention without creative effort are within the scope of protection of this invention.

[0031] The following is combined Figures 1 to 7 The present invention describes a thermal management system with battery 7 heat recovery.

[0032] like Figure 1 As shown, the present invention provides a thermal management system with battery 7 heat recovery, including an air conditioning unit, a thermal management unit 2 and a third pipe 3.

[0033] The air conditioning unit includes a compressor 12, a ventilation device 16, a condensing device 14, a first throttling device 15, a four-way reversing valve 13, and a gas-liquid separator 17. Preferably, the air conditioning unit in this invention is a variable frequency heat pump air conditioning unit, which can heat the heat exchange liquid in the pipes through a heat pump. The first interface of the gas-liquid separator 17, the compressor 12, and the four-way reversing valve 13 are sequentially connected through a first pipe 1. The second interface of the four-way reversing valve 13, the condensing device 14, the first throttling device 15, the ventilation device 16, and the fourth interface of the four-way reversing valve 13 are sequentially connected through the first pipe 1. The third interface of the four-way reversing valve 13 is connected to the gas-liquid separator 17 through the first pipe 1, forming a circuit for regulating the outlet air temperature of the ventilation device 16. It should be understood that the first pipe 1 in this invention does not refer to a single pipe, but rather to the various pipes in the air conditioning unit used to connect the various components and for circulating the heat exchange liquid. The first interface of the four-way reversing valve 13 described in this specification is the interface connected to the compressor 12. Figure 1 Taking the first port of the four-way reversing valve 13 as an example, the second, third, and fourth ports are the other three ports in a clockwise direction. In an optional embodiment of the present invention, the condensing device 14 includes a condenser for exchanging heat between the heat exchange liquid in the circuit and the outside environment, and a condensing fan for accelerating heat exchange; the ventilation device 16 includes a condenser and a fan, the heat exchange liquid in the circuit exchanges heat with the outside air through the evaporator, the air blown out by the fan changes temperature after passing through the evaporator, and then enters the vehicle interior (e.g., the passenger compartment) to regulate the temperature inside the vehicle. Preferably, the first throttling device 15 in the present invention is an electronic expansion valve for regulating the flow rate of the heat exchange liquid in the circuit.

[0034] One end of the third pipe 3 is connected to the first pipe 1 between the gas-liquid separator 17 and the four-way reversing valve 13, and the connection point is the first end point; the other end of the third pipe 3 is connected to the first pipe 1 between the ventilation device 16 and the first throttling device 15, and the connection point is the second end point. The heat exchange liquid in the third pipe 3 participates in the circulation of the heat exchange liquid in the first pipe 1 under the action of the compressor 12.

[0035] The thermal management unit 22 includes a liquid storage device 22, a pumping device 21, and a heat exchange device 23. The liquid storage device 22 (e.g., a water tank) and the pumping device 21 are connected through a second pipe 24, forming a circuit for cooling the battery 7. A section of the second pipe 24 contains heat exchange fluid that exchanges heat with the vehicle's battery 7, cooling or heating the battery 7. It should be understood that the second pipe 24 in this invention does not refer to a single pipe, but rather to the various pipes within the thermal management unit 22 used to connect different components and circulate the heat exchange fluid. A portion of the heat exchange device 23 is installed on the second pipe 24, and another portion is installed on the third pipe 3, for heat exchange with the heat exchange fluid in the two circuits. When there is a temperature difference between the heat exchange fluids in the two circuits, the heat exchange device 23 can transfer heat. For example, if the temperature of the heat exchange fluid in one circuit is higher than that in the other circuit, the heat exchange device 23 can transfer heat to balance the temperatures of the heat exchange fluids in the two circuits. In an optional embodiment of the present invention, the heat exchange device 23 may be a plate heat exchanger. It should be understood that the present invention does not limit the specific structure and material of the plate heat exchanger; for example, it may be a conventional finned structure or a microchannel structure, and the fins may be made of copper or aluminum. The pumping device 21 provides power to circulate the heat exchange liquid in the second pipe 24 in the loop and to exchange heat through the heat exchange device 23. Preferably, the pumping device 21 in the present invention is a water pump.

[0036] The heat exchange fluid in the second pipe 24 cools the battery 7 while heating itself. When the temperature of the heat exchange fluid in the third pipe 3 is lower than that of the heat exchange fluid in the second pipe 24, the heat exchange fluid in the second pipe 24 heats the heat exchange fluid in the third pipe 3 through the heat exchange device 23. The heat exchange fluid in the third pipe 3 participates in the circulation of the loop, which raises the temperature of the heat exchange fluid in the entire loop. This, in turn, raises the temperature of the air blown out by the fan in the evaporator, heating the interior of the vehicle. This achieves the recovery and utilization of the heat dissipated by the battery 7, reducing the power consumption of the air conditioning unit for heating the interior of the vehicle.

[0037] In one optional embodiment of this application, a first valve 31 is installed on the third pipe 3 between the heat exchanger 23 and the first endpoint, and a second valve 32 is installed on the third pipe 3 between the heat exchanger 23 and the second endpoint. This invention does not limit the specific types of the first valve 31, second valve 32, third valve 33, fourth valve 34, and fifth valve 43; for example, solenoid valves, three-way valves, etc., can be used, with solenoid valves being a preferred option. When both the first valve 31 and the second valve 32 are open, the heat exchange liquid in the third pipe 3 participates in the circulation of the heat exchange liquid in the first pipe 1. When both the first valve 31 and the second valve 32 are closed, the heat exchange liquid in the third pipe 3 does not participate in the circulation of the heat exchange liquid in the first pipe 1, and the air conditioning unit and thermal management unit 2 perform self-circulation.

[0038] In an optional embodiment of the present invention, a first branch pipe is provided on the third pipe 3 between the second valve 32 and the heat exchange device 23. The first branch pipe is connected to the first pipe 1 between the first throttling device 15 and the condensing device 14. The third valve 33 is installed on the first branch pipe.

[0039] In an optional embodiment of the present invention, a second branch pipe is provided on the second pipe 24 between the first valve 31 and the heat exchange device 23, and the second branch pipe is connected to the first pipe 1 between the four-way reversing valve 13 and the ventilation device 16; a fourth valve 34 is installed on the second branch pipe. When the first valve 31, the second valve 32 and the first throttling device 15 are all closed and the fourth valve 34 is open, the ventilation device 16 does not participate in the circulation of the heat exchange liquid, and the air conditioning unit exchanges heat with the thermal management unit 2 through the heat exchange device 23.

[0040] In an optional embodiment of the present invention, the above-described thermal management system with battery 7 heat recovery further includes a flow control module 4, which includes a fourth pipe 41 and a flow regulating valve 42. One end of the fourth pipe 41 is connected to a first pipe 1 between the four-way reversing valve 13 and the condensing device 14, and the other end is connected to a first pipe 1 between the four-way reversing valve 13 and the ventilation device 16. The flow regulating valve 42 is installed on the fourth pipe 41 and is used to regulate the ratio of heat exchange liquid entering the fourth pipe 41 and entering the first pipe 1.

[0041] In an optional embodiment of the present invention, the flow control module 4 further includes a fifth valve 43, which is installed on the first pipe 1 between the four-way reversing valve 13 and the condensing device 14, and is located between the four-way reversing valve 13 and the fourth pipe 41. When the fifth valve 43 is closed, the heat exchange liquid can only enter the condensing device 14 through the fourth pipe 41 for heat exchange, and the heat exchange liquid can be prevented from flowing back from the condensing device 14 to the gas-liquid separator 17 through the four-way reversing valve 13.

[0042] In an optional embodiment of the present invention, in order to ensure the unidirectional flow of heat exchange liquid in the circuit from compressor 12 to four-way reversing valve 13, a one-way valve 18 is installed on the first pipeline 1 between compressor 12 and four-way reversing valve 13 to prevent the liquid in the first pipeline 1 from flowing from four-way reversing valve 13 to compressor 12.

[0043] In an optional embodiment of the present invention, a second throttling device 5 is installed on the third pipe 3 between the heat exchange device 23 and the first branch pipe. Preferably, the second throttling device 5 is an electronic expansion valve, used to regulate the flow rate of the heat exchange liquid in the third pipe 3.

[0044] In an optional embodiment of the invention, at least one filter device 6 is installed on the third pipe 3. Preferably, the filter device 6 is a filter, which is installed on the third pipe 3 on both sides of the second throttling device 5 to prevent impurities in the cooling liquid from clogging the second throttling device 5.

[0045] The following are some specific examples, combined with Figures 2 to 8 The working principle of the thermal management system with battery 7 heat recovery provided by this invention will be explained. The arrows on each pipe in the figure indicate the flow direction of the cooling liquid in the pipe:

[0046] Operating Condition 1: Both the vehicle's passenger compartment and battery 7 require cooling.

[0047] This operating condition typically occurs in summer when the passenger compartment requires cooling, and the vehicle's thermal management unit 2 is unable to meet the cooling capacity requirements of the battery 7. For example... Figure 2 As shown, under this operating condition, the first valve 31 and the second valve 32 remain closed, the flow regulating valve 42 remains closed, the third valve 33, the fourth valve 34, and the fifth valve 43 remain open, the first and second ports of the four-way reversing valve 13 are connected, the third and fourth ports are connected, and the first throttling device 15 and the second throttling device 5 remain open. High-temperature, high-pressure gaseous refrigerant (i.e., gaseous heat exchange liquid) flows from the compressor 12, passes through the four-way reversing valve 13, and then passes through the condenser to become high-temperature liquid refrigerant (i.e., liquid heat exchange liquid). At point A, the refrigerant splits into two paths: one path passes through the first throttling device 15, the evaporator, and the four-way reversing valve 13, sending air into the passenger compartment; the other path passes through the third valve 33 and the second throttling device 5, and then the two paths merge, returning to the compressor 12 via the four-way reversing valve 13 and the gas-liquid separator 17. This process achieves both passenger compartment cooling and battery 7 cooling.

[0048] Operating Condition 2: Passenger compartment requires cooling; Battery 7 self-circulation.

[0049] This operating condition typically occurs in summer, assuming the vehicle's thermal management unit 2 can meet the cooling requirements of the battery 7. For example... Figure 3 As shown, under this operating condition, the fifth valve 43 remains open, the flow regulating valve 42 remains closed, and the first valve 31, second valve 32, third valve 33, and fourth valve 34 all remain closed. The first and second ports of the four-way reversing valve 13 are connected, as are the third and fourth ports. The first throttling device 15 remains open. The high-temperature, high-pressure gaseous refrigerant flowing from the compressor 12 passes through the four-way reversing valve 13 and then becomes a high-temperature liquid refrigerant through the condenser. The refrigerant passes through the first throttling device 15 and the ventilation device 16 to reach the four-way reversing valve 13, and then returns to the compressor 12 through the gas-liquid separator 17. At this time, the thermal management unit 2 performs self-circulation.

[0050] Condition 3: The heating required for the passenger compartment is greater than the cooling required for battery 7.

[0051] This operating condition typically occurs in winter, when the passenger compartment needs to be heated and battery 7 needs to be cooled. For example... Figure 4 As shown, under this operating condition, the flow regulating valve 42 remains closed, the third valve 33 and the fourth valve 34 remain closed, the first valve 31, the second valve 32 and the fifth valve 43 remain open, the first and fourth ports of the four-way reversing valve 13 are connected, the second and third ports are connected, and the first throttling device 15 and the second throttling device 5 remain open. High-temperature, high-pressure gaseous refrigerant flows from the compressor 12 through the four-way reversing valve 13 to the ventilation device 16. At point A, the refrigerant splits into two paths: one path passes through the first throttling device 15, the condenser 14, and the four-way reversing valve 13; the other path passes through the second valve 32, the second throttling device 5, and the heat exchange device 23. The two paths then converge and return to the compressor 12 via the gas-liquid separator 17. During this process, the heat generated by the battery 7 is insufficient to raise the passenger room temperature to the target temperature; therefore, the heat pump needs to be turned on to meet the heating needs of the passenger room.

[0052] Condition 4: The heating requirement of the passenger compartment is less than the cooling requirement of battery 7.

[0053] This operating condition typically occurs in winter, when the passenger compartment needs to be heated and battery 7 needs to be cooled. For example... Figure 5As shown, under this operating condition, the fourth valve 34 and the fifth valve 43 remain closed, while the first valve 31, the second valve 32, and the third valve 33 remain open. The first and fourth ports of the four-way reversing valve 13 are connected, as are the second and third ports. The first throttling device 15 remains closed, the second throttling device 5 remains open, and the flow regulating valve 42 remains open. The high-temperature, high-pressure gaseous refrigerant flowing from the compressor 12 passes through the four-way reversing valve 13. At point A, the refrigerant is divided into two paths: one path goes to the ventilation device 16 to provide the required heat to the passenger compartment; under the distribution of the flow regulating valve 42, the remaining heat enters the condensing device 14 through the fourth pipe 41. Then, the two refrigerant paths merge, pass through the second throttling device 5, and enter the heat exchange device 23 to cool the battery 7. Finally, it returns to the compressor 12 via the gas-liquid separator 17. During this process, the waste heat of the battery 7 can be fully utilized, achieving both heating of the passenger compartment and cooling of the battery 7. For example, when the heating capacity required for the guest room is 8 kW and the cooling capacity required for battery 7 is 15 kW, the heat obtained from battery 7 is distributed at point A through the flow regulating valve 42 to regulate the flow rate, providing 8 kW to the guest room, and the remaining 7 kW is dissipated to the external environment through the condenser 14.

[0054] Operating Condition 5: The heating requirement of the passenger compartment is equal to the cooling requirement of Battery 7.

[0055] This operating condition typically occurs in winter, when the passenger compartment needs to be heated and battery 7 needs to be cooled. For example... Figure 6 As shown, under this operating condition, the flow regulating valve 42 remains closed, the third valve 33, the fourth valve 34, and the fifth valve 43 remain closed, the first valve 31 and the second valve 32 remain open, the first and fourth ports of the four-way reversing valve 13 are connected, and the second and third ports are connected; the second throttling device 5 remains open. The high-temperature and high-pressure gaseous refrigerant flowing from the compressor 12 returns to the compressor 12 through the four-way reversing valve 13, the ventilation device 16, the second throttling device 5, the heat exchange device 23, and the gas-liquid separator 17, so that the waste heat of the battery 7 can be fully utilized, achieving both heating of the passenger compartment and cooling of the battery 7.

[0056] Operating Condition 6: Passenger cabin heating, battery 7 self-circulation

[0057] This operating condition typically occurs in winter, when the passenger compartment needs to be heated and the thermal management unit 2 can meet the heat dissipation requirements of the battery 7. For example... Figure 7As shown, under this operating condition, the flow regulating valve 42 remains closed, the fifth valve 43 remains open, and the first valve 31, second valve 32, third valve 33, and fourth valve 34 remain closed. The first and fourth ports of the four-way reversing valve 13 are connected, as are the second and third ports. The first throttling device 15 remains open. High-temperature, high-pressure gaseous refrigerant flows from the compressor 12, passes through the four-way reversing valve 13, the ventilation device 16, the first throttling device 15, and the ventilation device 16, and then returns to the compressor 12 via the gas-liquid separator 17. At this time, the battery 7 undergoes self-circulation.

[0058] Operating Condition 7: Vehicle Preparation in Low-Temperature Environments

[0059] This condition typically occurs in winter, during the vehicle preparation phase before departure. For example... Figure 8 As shown, under this operating condition, the flow regulating valve 42 remains closed, the first valve 31 and the second valve 32 remain closed, the third valve 33, the fourth valve 34 and the fifth valve 43 remain open, the first and fourth ports of the four-way reversing valve 13 are connected, the second and third ports are connected, and the second throttling device 5 remains open. High-temperature, high-pressure gaseous refrigerant flows from the compressor 12, passes through the four-way reversing valve 13, the heat exchange device 23, the second throttling device 5 and the condensing device 14, reaches the four-way reversing valve 13, and then returns to the compressor 12 via the gas-liquid separator 17. Under this operating condition, the heat pump heats the refrigerant in the air conditioning unit, and then, through the refrigerant circulation, heats the battery 7 via the heat exchange device 23, preventing the battery 7 from failing to function properly in low-temperature environments.

[0060] In summary, the thermal management system with battery 7 heat recovery provided by this invention consists of a variable frequency heat pump air conditioning unit and a thermal management unit 2, which saves some equipment of the traditional thermal management unit 2 (the equipment for cooling and the heating equipment for heating the battery 7). Whether in cooling or heating mode, the air conditioning unit and the thermal management unit share the third pipe 3, making the overall layout of the thermal management unit 2 more compact, occupying less space, and lighter. By adding and controlling components such as the first valve 31, the second valve 32, the third valve 33, the fourth valve 34, the fifth valve 43, and the flow regulating valve 42, the heat recovery and utilization of the battery 7 is realized, and the battery 7 can be heated or cooled by the air conditioning unit, which has good application effect.

[0061] Based on the same inventive concept, the present invention also provides a vehicle that includes any of the above-described thermal management systems with battery 7 heat recovery, thereby achieving the same technical effects as the above-described thermal management systems with battery 7 heat recovery.

[0062] The device embodiments described above are merely illustrative. The units described as separate components may or may not be physically separate. The components shown as units may or may not be physical units; that is, they may be located in one place or distributed across multiple network units. Some or all of the modules can be selected to achieve the purpose of this embodiment according to actual needs. Those skilled in the art can understand and implement this without any creative effort.

[0063] Through the above description of the embodiments, those skilled in the art can clearly understand that each embodiment can be implemented by means of software plus necessary general-purpose hardware platforms, and of course, it can also be implemented by hardware. Based on this understanding, the above technical solutions, in essence or the part that contributes to the prior art, can be embodied in the form of a software product. This computer software product can be stored in a computer-readable storage medium, such as ROM / RAM, magnetic disk, optical disk, etc., and includes several instructions to cause a computer device (which may be a personal computer, server, or network device, etc.) to execute the methods described in the various embodiments or some parts of the embodiments.

[0064] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, and not to limit them; although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features; and these modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A thermal management system with battery heat recovery, characterized in that, This includes air conditioning units, thermal management units, and third-party piping; The air conditioning unit includes a compressor, a ventilation device, a condensing device, a first throttling device, a four-way reversing valve, and a gas-liquid separator. The gas-liquid separator, the compressor, and the first port of the four-way reversing valve are connected in sequence through a first pipe. The second port of the four-way reversing valve, the condensing device, the first throttling device, the ventilation device, and the fourth port of the four-way reversing valve are connected in sequence through the first pipe. The third port of the four-way reversing valve is connected to the gas-liquid separator through the first pipe, forming a circuit for adjusting the outlet air temperature of the ventilation device. One end of the third pipe is connected to the first pipe between the gas-liquid separator and the four-way reversing valve, and the connection point is the first end point; the other end of the third pipe is connected to the first pipe between the ventilation device and the first throttling device, and the connection point is the second end point. The thermal management unit includes a liquid storage device, a pumping device, and a heat exchange device; the liquid storage device and the pumping device are connected through a second pipe and form a circuit for cooling the battery; a part of the heat exchange device is installed on the second pipe and a part is installed on the third pipe for heat exchange with the heat exchange liquid in the two circuits. It also includes a flow control module, which includes a fourth pipe and a flow regulating valve; one end of the fourth pipe is connected to the first pipe between the four-way reversing valve and the condensing device, and the other end is connected to the first pipe between the four-way reversing valve and the ventilation device; the flow regulating valve is installed on the fourth pipe and is used to regulate the ratio of heat exchange liquid entering the fourth pipe and entering the first pipe. The heat generated by the battery can heat the heat exchange liquid in the heat exchange device. The heated heat exchange liquid is then added to the heat exchange liquid circulation of the air conditioning unit, thereby utilizing the heat generated by the battery to heat the interior of the vehicle and recovering the heat dissipated by the battery.

2. The thermal management system with battery heat recovery according to claim 1, characterized in that, A first valve is installed on the third pipe between the heat exchange device and the first end point, and a second valve is installed on the third pipe between the heat exchange device and the second end point.

3. The thermal management system with battery heat recovery according to claim 2, characterized in that, A first branch pipe is provided on the third pipe between the second valve and the heat exchange device. The first branch pipe is connected to the first pipe between the first throttling device and the condensing device. A third valve is installed on the first branch pipe.

4. The thermal management system with battery heat recovery according to claim 3, characterized in that, A second branch pipe is provided on the second pipe between the first valve and the heat exchange device, and the second branch pipe is connected to the first pipe between the four-way reversing valve and the ventilation device; a fourth valve is installed on the second branch pipe.

5. The thermal management system with battery heat recovery according to claim 4, characterized in that, The flow control module also includes a fifth valve, which is installed on the first pipe between the four-way reversing valve and the condensing device, and is located between the four-way reversing valve and the fourth pipe.

6. The thermal management system with battery heat recovery according to any one of claims 1-5, characterized in that, A check valve is installed on the first pipe between the compressor and the four-way reversing valve to prevent liquid in the first pipe from flowing from the four-way reversing valve toward the compressor.

7. The thermal management system with battery heat recovery according to any one of claims 3-5, characterized in that, A second throttling device is installed on the third pipe between the heat exchanger and the first branch pipe.

8. The thermal management system with battery heat recovery according to any one of claims 1-5, characterized in that, At least one filter device is installed on the third pipe.

9. A vehicle, characterized in that, Including a thermal management system with battery heat recovery as described in any one of claims 1-8.

Images