A battery thermal management system integrating thermoelectric power generation and refrigeration

Abstract

The application provides a battery thermal management system integrating thermoelectric power generation and refrigeration device, relates to the field of vehicle power battery thermal management, and changes different heat exchange pipelines among a fuel heater, a thermoelectric device and a power battery through the change of an electromagnetic valve, so that the thermoelectric device can be used for both power generation and refrigeration to perform thermal management on the power battery; when the vehicle starts, the heat of the fuel heater can be used to generate power through the thermoelectric device, and the waste heat of the cold end is used for low-temperature heating of the battery pack; when the power battery needs to be cooled, the thermoelectric device uses the Peltier effect to perform refrigeration to reduce the temperature of the battery pack; meanwhile, the thermoelectric device can also be used as a heating device to perform low-temperature heating on the battery pack in the working condition in which the fuel heater does not start, and provides preheating, cooling and heating management of the power battery, so that the power battery can maintain a suitable working temperature range in different working conditions and the service life of the power battery is prolonged.

Description

Technical Field

[0001] This invention relates to the field of thermal management of automotive power batteries, specifically a battery thermal management system that integrates thermoelectric power generation and refrigeration devices. Background Technology

[0002] With advancements in electric drive system technology and the implementation of the "dual-carbon" strategy, electrification has become a crucial development direction for future vehicles. Electric drive systems, due to their fast response and high power output, are increasingly being used in vehicle powertrains. Furthermore, the growing electrical demands within vehicles necessitate the use of high-energy-density batteries for storage. Lithium-ion batteries, with their advantages of high energy density, long cycle life, low self-discharge rate, low operating and maintenance costs, wide operating temperature range, and excellent reliability, have become the most widely used power batteries for new energy vehicles.

[0003] For vehicles that operate in cold conditions for extended periods, fuel-powered parking heaters are typically installed to preheat the engine when starting the vehicle in cold weather. However, because fuel heaters are usually quite hot, they cannot directly preheat the battery. Without preheating, the battery will experience increased internal resistance and reduced capacity at low temperatures. In extreme conditions, this can even lead to electrolyte freezing and the battery failing to discharge. The low-temperature performance of the battery system is significantly affected, resulting in reduced power output and driving range in electric vehicles.

[0004] Furthermore, after the power battery has been working for a period of time, a lot of heat will be generated inside the battery due to electrochemical reactions. The battery pack has a relatively compact structure, making it difficult to dissipate the excess heat. This can affect the battery's lifespan or even cause the battery to catch fire or explode, resulting in a safety accident.

[0005] Furthermore, my country has a large latitude and longitude span and a complex and diverse climate. Electric vehicles usually face sub-zero temperatures in winter, which causes a sharp decline in the charging and discharging performance of the power battery. When the battery generates heat, it is difficult to dissipate heat effectively, resulting in the power battery being unable to maintain its suitable operating temperature range under different operating conditions, which greatly restricts the performance of electric vehicles. Summary of the Invention

[0006] Technical problems to be solved To address the shortcomings of existing technologies, this invention provides a battery thermal management system that integrates thermoelectric power generation and refrigeration devices. The aim is to solve the energy management problem inside vehicles and to provide an integrated thermal management system for the power battery and the fuel-powered parking heater in vehicles under cold operating conditions.

[0007] The fuel heater provides heat for the engine's cold start while simultaneously using high-temperature heat-conducting oil to carry away heat, which is then used as the hot end of a thermoelectric device to generate electricity. The cooled end of the thermoelectric device is then used to rapidly heat the battery to its normal operating temperature. In battery heating conditions where the burner is not needed as a heat source, the thermoelectric device can also act as a heat pump to heat the battery at low temperatures. When the battery needs cooling, the thermoelectric device can be powered by an electric current, acting as a cooler, and by opening and closing relevant valves, it dissipates heat from the battery pack to maintain the battery within its optimal operating temperature range.

[0008] Technical solution To achieve the above objectives, the present invention provides the following technical solution: a battery thermal management system integrating thermoelectric power generation and refrigeration devices, comprising a fuel heater, thermoelectric devices, and two sets of closed circulation pipelines connected to them. Different working fluids flow in the two sets of circulation pipelines. The left circulation pipeline is sequentially connected to a tubular heat exchanger attached to the fuel heater, a first liquid storage tank, and a first working fluid pump. The right circulation pipeline is sequentially connected to a battery pack liquid cooling jacket, a second liquid storage tank, and a second working fluid pump. A power battery is installed inside the battery pack liquid cooling jacket. The battery thermal management system also includes an auxiliary battery and a control module. The thermoelectric devices, the first working fluid pump, and the second working fluid pump are electrically connected to the control module. The control module controls the first and second working fluid pumps to drive the working fluid to flow in the two sets of circulation pipelines to maintain the most suitable operating temperature range of the power battery.

[0009] Preferably, the thermoelectric device includes a plurality of hot-end collectors and cold-end collectors. Each hot-end collector and cold-end collector is provided with a liquid inlet and a liquid outlet. The first end of the circulation pipeline on the left is connected to the liquid inlet and liquid outlet of the hot-end collector, and the first end of the circulation pipeline on the right is connected to the liquid inlet and liquid outlet of the cold-end collector.

[0010] Preferably, several hot-end collectors and cold-end collectors are arranged alternately, and a thermoelectric element is provided between the hot-end collectors and the cold-end collectors.

[0011] Preferably, the collector of the thermoelectric device needs to be covered with heat insulation material on its outer surface to prevent heat loss.

[0012] Preferably, a first air-cooled radiator is also connected in parallel through the left-side circulation pipeline. A first electromagnetic three-way valve and a second electromagnetic three-way valve are respectively installed at the junction of the first air-cooled radiator and the left-side circulation pipeline. The first electromagnetic three-way valve and the second electromagnetic three-way valve are electrically connected to the control module. The control module controls the opening and closing of the first electromagnetic three-way valve and the second electromagnetic three-way valve to realize the flow direction of the working fluid in the left-side circulation pipeline.

[0013] Preferably, a second air-cooled radiator is also connected in parallel through the circulation pipeline on the right side. A third electromagnetic three-way valve and a fourth electromagnetic three-way valve are respectively installed at the junction of the second air-cooled radiator and the circulation pipeline on the right side. The third electromagnetic three-way valve and the fourth electromagnetic three-way valve are electrically connected to the control module. The control module controls the opening and closing of the third electromagnetic three-way valve and the fourth electromagnetic three-way valve to realize the flow direction of the working fluid in the circulation pipeline on the right side.

[0014] Preferably, a flow regulating valve is also provided in the circulation pipeline on the right side. The flow regulating valve is connected between the working fluid pump 2 and the liquid storage tank 2, and the flow regulating valve is electrically connected to the control module.

[0015] Preferably, the working fluid flowing in the circulation pipeline on the left is a heat-conducting liquid.

[0016] Preferably, the working fluid flowing in the circulation pipeline on the right is a coolant.

[0017] Preferably, the liquid flows in opposite directions in the two interconnected circulation pipes of the thermoelectric device. Beneficial effects

[0018] This invention provides a battery thermal management system integrating thermoelectric power generation and refrigeration devices. It offers the following advantages: This integrated thermoelectric power generation and cooling battery thermal management system modifies the heat exchange pipelines between the fuel heater, thermoelectric devices, and power battery by changing the solenoid valves. This allows the thermoelectric devices to perform both power generation and cooling functions, providing thermal management for the power battery. When the vehicle starts, the heat from the fuel heater can be used to generate electricity through the thermoelectric devices, while the waste heat from the cold end is used for low-temperature heating of the battery pack. When the power battery needs cooling, the thermoelectric devices utilize the Peltier effect to cool the battery pack and lower its temperature. Simultaneously, the thermoelectric devices can also act as heating devices to provide low-temperature heating for the battery pack when the fuel heater is not running. This provides preheating, heat dissipation, and heating management for the power battery, ensuring it maintains its suitable operating temperature range under different operating conditions and improving its lifespan. Attached Figure Description

[0019] Figure 1 This invention relates to a power battery thermal management system pipeline that integrates thermoelectric power generation and refrigeration.

[0020] Figure 2 This is a schematic diagram of the working fluid and heat flow direction within the system pipeline of Embodiment 1 of the present invention; Figure 3 This is a schematic diagram of the working fluid and heat flow direction within the system pipeline of Embodiment 2 of the present invention; Figure 4 This is a schematic diagram of the working fluid and heat flow direction within the system pipeline of Embodiment 3 of the present invention; Figure 5This is a schematic diagram of the working fluid and heat flow direction within the system pipeline of Embodiment 4 of the present invention; Figure 6 This is a simplified structural diagram of the thermoelectric device of the present invention, which can be used for both power generation and cooling.

[0021] In the diagram: 1. Fuel heater; 2. Tubular heat exchanger; 3. Liquid storage tank 1; 4. Auxiliary battery; 5. Control module; 6. Solenoid three-way valve 1; 7. Air-cooled radiator 1; 8. Solenoid three-way valve 2; 9. Working fluid pump 1; 10. Thermoelectric device; 101. Hot end collector; 102. Cold end collector; 103. Liquid inlet; 104. Liquid outlet; 105. Thermoelectric element; 11. Solenoid three-way valve 3; 12. Working fluid pump 2; 13. Flow regulating valve; 14. Liquid storage tank 2; 15. Battery pack liquid cooling jacket; 16. Solenoid three-way valve 4; 17. Air-cooled radiator 2; 18. Thermal insulation material. Detailed Implementation

[0022] This invention provides a battery thermal management system integrating thermoelectric power generation and refrigeration devices, such as... Figure 1-6 As shown, the device includes components such as a fuel heater 1, a tubular heat exchanger 2, a liquid storage tank 14 and a liquid storage tank 2, an auxiliary battery 4, a control module 5, a solenoid three-way valve 16 and a solenoid three-way valve 2, an air-cooled radiator 17 and an air-cooled radiator 2, a working fluid pump 19 and a working fluid pump 2, a thermoelectric device 10, a flow regulating valve 13, a battery pack liquid cooling jacket 15, a solenoid three-way valve 3 11, and a solenoid three-way valve 4 16. The outlet of the tubular heat exchanger 2 of the fuel heater 1 is connected to port a of the solenoid three-way valve 6, with the liquid storage tank 3 connected in the middle. Port b of the solenoid three-way valve 6 is connected to the working fluid pump 9, and the other end of the working fluid pump 9 is connected to the hot end collector 101 of the thermoelectric device 10. The outlet of the hot end collector 101 is connected to... The b port of electromagnetic three-way valve 2 is connected; the c port of electromagnetic three-way valve 16 is connected to air-cooled radiator 7, and the other end of air-cooled radiator 7 is connected to the c port of electromagnetic three-way valve 2; one end of the battery pack liquid cooling jacket 15 passes through the liquid storage tank 2 14, flow regulating valve 13, and working fluid pump 2 12, and is connected to the cold end collector 102 of thermoelectric device 10; the outlet of the cold end collector 102 is connected to the a port of electromagnetic three-way valve 3 11, the c port of electromagnetic three-way valve 3 11 is connected to the c port of electromagnetic three-way valve 4 16, the b port of electromagnetic three-way valve 3 11 passes through air-cooled radiator 2 17 and is connected to the b port of electromagnetic three-way valve 4 16; the a port of electromagnetic three-way valve 4 16 is connected to the inlet of battery pack liquid cooling jacket 15. The wires connected to thermoelectric device 10 are connected to control module 5 and auxiliary battery 4. The function of control module 5 is to perform voltage regulation and current direction control.

[0023] Furthermore, the opening and closing of each port of electromagnetic three-way valve 16, electromagnetic three-way valve 28, electromagnetic three-way valve 311, and electromagnetic three-way valve 416 can be controlled by the control module to realize the connection of different pipelines under different working conditions.

[0024] Furthermore, the working fluid used in the working fluid pump 9 and the closed pipeline is a heat-conducting liquid with a high boiling point and a high thermal conductivity.

[0025] Furthermore, the working fluid used in the working fluid pump 2 12 and the closed pipeline is a coolant with high thermal conductivity and a wide operating temperature range.

[0026] Furthermore, in the tubular heat exchanger 2 attached to the fuel heater 1, high-temperature gas and heat-conducting liquid exchange heat; the air-cooled radiator 1 7 is where the heat-conducting liquid in the pipeline exchanges heat with the external environment under forced air cooling; and the air-cooled radiator 2 17 is where the coolant in the pipeline exchanges heat with the external environment under forced air cooling.

[0027] Furthermore, the control module 5 has the functions of controlling the opening and closing of each electromagnetic three-way valve, temperature acquisition, pressure regulation, and changing the direction of the current entering the thermoelectric device.

[0028] Furthermore, in the thermoelectric device 10, the liquid flow directions at both ends are opposite, that is, the working fluid pump 9 and the working fluid pump 12 pump the liquid in the two closed pipes in opposite directions.

[0029] Furthermore, the collector of the thermoelectric device 10 needs to be covered with heat insulation material 18 on its outer surface to prevent heat loss.

[0030] Based on the battery thermal management system of the integrated thermoelectric power generation and refrigeration device described above, the following are examples of operating conditions: Example 1. Under low-temperature start-up conditions, both the car engine and the power battery need to be preheated. At this time, the fuel heater 1 is activated to provide a heat source for both.

[0031] At this time, the control module opens ends a and b of electromagnetic three-way valve 6 and electromagnetic three-way valve 8, and closes ends c of both, forming a closed-loop circulation pipeline for the working fluid. Working fluid pump 9 starts working, pumping the heat transfer liquid into the tubular heat exchanger of the burner to absorb heat. The high-temperature heat transfer liquid flows through storage tank 3, three-way valve 6, and working fluid pump 9, entering the hot plate of the hot-end collector 101 of the thermoelectric device 10. It exchanges heat with the cold-end collector 102 through the thermoelectric element 105, generating electrical energy. After voltage regulation and stabilization by the control module 5, the auxiliary battery 4 is charged. After exiting the thermoelectric device, the working fluid flows back into the tubular heat exchanger 2 through electromagnetic three-way valve 8. Meanwhile, in the circulation pipeline on the other side, the control module 5 controls the opening of ends a and c of the electromagnetic three-way valve 11 and electromagnetic three-way valve 16, and closes ends b of both. The coolant working fluid is pumped by the working fluid pump 12 and flows through the heat spreader plate of the cold end collector 102 of the thermoelectric device 10. After absorbing the heat transferred by the thermoelectric device 10, it enters the battery pack liquid cooling jacket 15 to preheat the battery pack. The working fluid passes through the liquid storage tank 14 and the flow regulating valve 13. At this time, the flow control valve is opened to the maximum to achieve the best heat exchange performance. The battery pack is equipped with a temperature sensor. If the temperature reaches the appropriate level, but the burner is still preheating the engine, the passages of the electromagnetic three-way valve 11 and electromagnetic three-way valve 16 are changed. The a and b ends of the two valves are opened, and the c end is closed. This closes branch one, allowing the working fluid to enter branch two and flow through the air-cooled radiator 17. Some of the heat from the coolant is dissipated through the tubular heat exchanger 2, reducing the temperature of the working fluid at the cold end and preventing the battery pack from burning out due to excessive temperature. At the same time, the temperature difference during power generation is increased until the fuel heater 1 finishes heating, at which point the working fluid pump 9 stops working.

[0032] Example 2: Under heat dissipation conditions where the battery heat generation is not high; The battery pack does not require enhanced heat dissipation from thermoelectric cooling devices. It can dissipate heat simply by pumping coolant into the air-cooled radiator 17 via the working fluid pump 12. The heat transfer fluid circuit on the other side is closed. At this time, the thermoelectric device 10 is not energized. The a and b ends of the electromagnetic three-way valve 11 and the electromagnetic three-way valve 16 are open, while the c end is closed. After absorbing heat in the battery pack liquid cooling jacket 15, the coolant flows through the liquid storage tank 14, the flow regulating valve 13, the working fluid pump 12, and the heat spreader of the cold-end collector 102, and dissipates heat in the air-cooled radiator 17, thus dissipating the heat carried by the coolant. The function of the flow regulating valve 13 is to regulate the working fluid flow rate to increase or decrease the heat exchange in the battery liquid cooling jacket 15, thereby controlling the battery temperature.

[0033] Example 3. Under heat dissipation conditions where the battery generates a lot of heat; Thermoelectric device 10 needs to be in cooling mode to enhance heat transfer. At this time, the a and c ends of electromagnetic three-way valve 11 and electromagnetic three-way valve 16 are open, and the b end is closed. The working fluid pump 12 is started, and the coolant flows counterclockwise. After absorbing heat in the battery pack liquid cooling jacket 15, it flows through the liquid storage tank 14 and the flow regulating valve 13, and enters the cold end collector 102 of thermoelectric device 10 for heat exchange. According to the battery temperature, the control module 5 outputs different currents to control the cooling capacity of thermoelectric device 10, transferring the heat carried by the coolant from the cold end collector 102 to the hot end collector 101. The coolant continues to flow back to the battery pack through branch one to absorb heat. If the battery pack generates a large amount of heat, the coolant will still be at a high temperature after flowing through the thermoelectric device. Control module 5 controls the opening of ends a and b of electromagnetic three-way valve 11 and electromagnetic three-way valve 16, while closing end c. The coolant then flows through the air-cooled radiator 17 in branch two for further heat dissipation before flowing back to the battery pack. In the circulation system on the left, the fuel heater 1 is in the off state. Electromagnetic three-way valve 6 and electromagnetic three-way valve 8 have ends b and c open, while end a is closed. After absorbing heat in the thermoelectric device 10, the heat-conducting liquid flows through the air-cooled radiator 7 to dissipate all the heat, and then flows back to the hot end heat spreader of the thermoelectric device 10 via the working fluid pump 9, completing the circulation.

[0034] Example 4. Under the condition that the battery requires low-temperature heating, but the burner does not need to be started; Thermoelectric device 10 is used as a heater. Under the control of module 5, the current flowing into thermoelectric device 10 is reversed, turning the original cold end into the hot end, replacing the traditional PTC heater, and acting as a heat pump to heat the power battery pack. The b and c ends of the left-side pipeline electromagnetic three-way valve 6 and electromagnetic three-way valve 8 are opened, while the a end is closed. The working fluid pump 9 starts working, and the heat transfer liquid flows only through the pipes of the air-cooled radiator 7, which serves as the cold end heat absorption pipe of the refrigeration device. The working fluid flows through the heat spreader of thermoelectric device 10 and air-cooled radiator 7 and absorbs heat, and then flows through the working fluid pump 9 and thermoelectric device 10 to complete the cycle. In the right-side pipeline, ends a and c of electromagnetic three-way valve 311 and electromagnetic three-way valve 416 are open, while end b is closed. Working fluid pump 212 is working, and the coolant gains heat in the heat spreader of thermoelectric device 10. It then flows into the battery pack liquid cooling jacket 15 to heat the power battery pack to meet the temperature requirements of the battery pack. Then it flows through storage tank 214, flow regulating valve 13, and working fluid pump 212, and re-enters the thermoelectric device to absorb heat, completing the cycle.

[0035] The fuel heater, solenoid three-way valve, air-cooled radiator, flow regulating valve, temperature sensor, and working fluid pump involved in this embodiment are all commercially available products and can be selected according to requirements.

[0036] Working Principle: This invention utilizes thermoelectric cooling technology, a novel cooling method developed based on the Peltier effect. When direct current passes through a PN junction composed of P-type and N-type semiconductors, heat is absorbed at the junction where the N-type semiconductor flows to the P-type semiconductor, and released at the junction where the P-type semiconductor flows to the N-type semiconductor. Thermoelectric power generation is based on the Seebeck effect; when there is a large temperature difference across the PN junction, current is generated in the path, directly converting heat energy into electrical energy. Similar in structure to thermoelectric cooling devices, both are thermoelectric devices made by thermally paralleling and electrically connecting multiple thermoelectric units, enabling the transfer between electrical and heat energy. Compared with traditional waste heat recovery or chillers, thermoelectric devices have advantages such as compact structure, small size, long lifespan, no vibration or noise, simple operation, and no environmental pollution. By altering the solenoid valves, the heat exchange pipelines between the fuel heater 1, thermoelectric device 10, and power battery are changed, enabling the thermoelectric device to perform both power generation and cooling functions, thus managing the power battery's thermal performance. When the vehicle starts, the heat from the fuel heater 1 can be used to generate electricity through the thermoelectric device 10, with the waste heat from the cold end used for low-temperature heating of the battery pack. When the power battery needs cooling, the thermoelectric device 10 utilizes the Peltier effect to cool the battery pack and lower its temperature. Simultaneously, the thermoelectric device 10 can also function as a heating element, providing low-temperature heating for the battery pack when the fuel heater 1 is not running. This provides preheating, heat dissipation, and heating management for the power battery, maintaining it within its appropriate operating temperature range under different conditions and improving its lifespan.

[0037] In summary, this battery thermal management system, which integrates thermoelectric power generation and refrigeration, modifies the heat exchange pipelines between the fuel heater, thermoelectric devices, and power battery by changing the solenoid valves. This allows the thermoelectric devices to perform both power generation and refrigeration, thus managing the power battery's thermal performance. When the vehicle starts, the heat from the fuel heater can be used to generate electricity through the thermoelectric devices, while the waste heat from the cold end is used for low-temperature heating of the battery pack. When the power battery needs cooling, the thermoelectric devices utilize the Peltier effect to lower the battery pack temperature. Simultaneously, the thermoelectric devices can also function as heating devices, providing low-temperature heating for the battery pack when the fuel heater is not activated. This provides preheating, heat dissipation, and heating management for the power battery, maintaining it within its suitable operating temperature range under different operating conditions and improving its lifespan.

[0038] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A battery thermal management system integrating a thermoelectric power generation and refrigeration device, characterized by: The system includes a fuel heater (1), a thermoelectric device (10), and two sets of closed circulation pipelines connected to it. Different working fluids flow in the two sets of circulation pipelines. The left circulation pipeline is connected in sequence to the tubular heat exchanger (2) attached to the fuel heater (1), the first liquid storage tank (3), and the first working fluid pump (9). The right circulation pipeline is connected in sequence to the battery pack liquid cooling jacket (15), the second liquid storage tank (14), and the second working fluid pump (12). The power battery is installed in the battery pack liquid cooling jacket (15). The battery thermal management system also includes an auxiliary battery (4) and a control module (5). The thermoelectric device (10), the first working fluid pump (9), and the second working fluid pump (12) are electrically connected to the control module (5). The control module (5) controls the first working fluid pump (9) and the second working fluid pump (12) to drive the working fluid to flow in the two sets of circulation pipelines in order to maintain the most suitable operating temperature range of the power battery. The thermoelectric device (10) includes several hot-end collectors (101) and cold-end collectors (102). Both the hot-end collectors (101) and the cold-end collectors (102) are provided with liquid inlet (103) and liquid outlet (104). The first end of the circulation pipeline on the left is connected to the liquid inlet (103) and liquid outlet (104) of the hot-end collector (101), and the first end of the circulation pipeline on the right is connected to the liquid inlet (103) and liquid outlet (104) of the cold-end collector (102). Several hot-end collectors (101) and cold-end collectors (102) are arranged alternately, and a thermoelectric element (105) is provided between the hot-end collectors (101) and the cold-end collectors (102). A first air-cooled radiator (7) is also connected in parallel through the circulation pipeline on the left. At the point where the first air-cooled radiator (7) connects to the circulation pipeline on the left, a first electromagnetic three-way valve (6) and a second electromagnetic three-way valve (8) are respectively installed. The first electromagnetic three-way valve (6) and the second electromagnetic three-way valve (8) are electrically connected to the control module (5). The control module (5) controls the opening and closing of the first electromagnetic three-way valve (6) and the second electromagnetic three-way valve (8) to realize the flow direction of the working fluid in the circulation pipeline on the left. A second air-cooled radiator (17) is also connected in parallel through the circulation pipeline on the right side. At the junction of the second air-cooled radiator (17) and the circulation pipeline on the right side, a third electromagnetic three-way valve (11) and a fourth electromagnetic three-way valve (16) are respectively installed. The third electromagnetic three-way valve (11) and the fourth electromagnetic three-way valve (16) are electrically connected to the control module (5). The control module (5) controls the opening and closing of the third electromagnetic three-way valve (11) and the fourth electromagnetic three-way valve (16) to realize the flow direction of the working fluid in the circulation pipeline on the right side.

2. The battery thermal management system integrated with a thermoelectric power generation and refrigeration device according to claim 1, characterized in that: The collector of the thermoelectric device (10) needs to be covered with heat insulation material (18) on its outer surface to prevent heat loss.

3. The battery thermal management system for an integrated thermoelectric power generation and refrigeration device according to claim 1, characterized in that: A flow regulating valve (13) is also provided in the circulation pipeline on the right side. The flow regulating valve (13) is connected between the working fluid pump (12) and the liquid storage tank (14). The flow regulating valve (13) is electrically connected to the control module (5).

4. The battery thermal management system for an integrated thermoelectric power generation and refrigeration device according to claim 1, characterized in that: The working fluid flowing in the circulation pipeline on the left is a heat-conducting liquid.

5. The battery thermal management system for an integrated thermoelectric power generation and refrigeration device according to claim 1, characterized in that: The working fluid flowing in the circulation pipeline on the right is a coolant.

6. A battery thermal management system for an integrated thermoelectric power generation and refrigeration device according to any one of claims 1-5, characterized in that: The liquid flows in opposite directions in the two sets of circulating pipes connected in the thermoelectric device (10).

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