Temperature control system based on quasi-isothermal compression refrigeration and flow channel design method

Abstract

The temperature control system comprises a refrigeration cycle unit and a liquid cooling plate heat exchange unit, the refrigeration cycle unit comprises an evaporator, the liquid cooling plate heat exchange unit comprises a heat exchanger, and the evaporator is connected with the heat exchanger to achieve heat exchange. The intelligent control unit controls the refrigeration cycle unit and the liquid cooling plate heat exchange unit to work; according to the piston of the refrigeration compressor, a traditional piston and the porous medium are combined to form the isothermal piston, a gas-liquid-solid coupling structure is formed in the refrigeration compressor through the porous medium, heat transfer in the compression process is enhanced, quasi-isothermal compression is achieved, the exhaust pressure of the refrigeration compressor is ensured, meanwhile, the exhaust temperature of the refrigeration compressor is reduced, and the service life of the refrigeration compressor is prolonged. Energy consumption of a refrigeration compressor is reduced, and efficiency of an energy storage battery temperature control system is improved; according to the regional heat dissipation difficulty degree of the energy storage battery, the flow channel density of the liquid cooling plate of the energy storage battery is designed, the problem that the internal temperature distribution of the energy storage battery is not uniform is solved, and the service life of the energy storage battery is prolonged.

Description

Technical Field

[0001] The present invention relates to the technical field of energy storage battery temperature control, and specifically to a temperature control system based on quasi-isothermal compression refrigeration and a design method for optimizing the flow channel density of the system. Background Art

[0002] In recent years, electrochemical energy storage technology has developed rapidly, and energy storage batteries have developed towards high energy density and large capacity, and the accompanying temperature control problem has gradually become prominent. Large capacity, high energy density, and high power have put forward higher requirements for the heat dissipation of energy storage batteries. At present, the mainstream cooling solutions for energy storage batteries include liquid cooling and air cooling, and the market share of liquid cooling solutions is gradually increasing. The liquid cooling solution uses the circulation of liquid in the liquid cooling plate flow channel to remove the heat generated during the operation of the energy storage battery to achieve cooling.

[0003] Regarding the temperature control problem of energy storage batteries, the main research contents include: 1) Temperature control method of energy storage system or battery: For example, patent CN 116799367A proposes an energy storage system and temperature control method. The liquid inlet pipe of the temperature control device is connected to multiple temperature control valves corresponding to multiple battery clusters, and the amount of coolant flowing into each battery module in the battery cluster corresponding to each temperature control valve is adjusted according to the target opening value of the temperature control valve. It is possible to solve the problem of poor voltage consistency of energy storage batteries within and between clusters without adding DC converters, and to solve the circulation problem formed by energy storage batteries during the charging and discharging process without increasing costs. Patent CN 116885331A proposes an energy storage battery temperature control system and energy storage battery cabinet, which solves the problem that traditional energy storage temperature control systems cannot adapt to conditions in different regions and operate efficiently. 2) Liquid cooling plate flow channel design optimization: Patent CN 116910973A proposes a cold plate flow channel path design method and a liquid cooling plate, which combines thermal design problems with graph theory and operations research, converts the flow channel path design problem into a shortest path problem with constraints and increased weights, and obtains the lowest flow resistance while ensuring the heat dissipation performance of the cold plate when the flow channel passes through the heat source points of each device. It also fully considers the reliability of engineering applications and the practicality of production and processing, providing a standard reference for the cold plate flow channel design of electronic devices. Patent CN112290583A proposes an incremental liquid cooling channel design method, channel system and battery pack. The design method adopts an incremental cooling channel design, which helps to achieve uniform temperature of heat dissipation and solves the problem of local high temperature and local low temperature. There are fewer channels near the water inlet, and the heat exchange area is small, which reduces the heat exchange between the battery cell and the liquid cooling plate at the water inlet. There are more channels far away from the water inlet, and the heat exchange area is large, which improves the heat exchange between the remote battery cell and the liquid cooling plate, helps to reduce the flow resistance of the thermal management components, and helps to improve the yield of liquid cooling plate stamping. The structure and method of the patented temperature control system are complex and difficult to apply. The patent does not involve how to reduce refrigeration energy consumption, nor does it involve optimizing the flow channel layout of energy storage batteries by regional division.

[0004] Reducing refrigeration energy consumption can ensure the efficient and stable operation of the energy storage battery temperature control system. Specifically, the regional division method is used to optimize the flow path layout of the energy storage battery, effectively alleviate the problem of uneven temperature distribution inside the energy storage battery, and increase its service life. Research in this area is relatively scarce. Summary of the invention

[0005] The purpose of the present invention is to provide a temperature control system based on quasi-isothermal compression refrigeration, and a design method for optimizing the flow channel density of the temperature control system. Aiming at the energy consumption problem of the temperature control system of an energy storage battery, a porous medium is used to form an isothermal piston, so as to realize the quasi-isothermal compression of the refrigeration compressor, reduce the energy consumption of the refrigeration compressor, improve the efficiency of the temperature control system of the energy storage battery, and ensure the efficient and stable operation of the temperature control system of the energy storage battery; at the same time, combined with the difficulty of regional heat dissipation of the energy storage battery, the flow channel layout density of the liquid cooling plate of the energy storage battery is optimized and designed, so as to effectively alleviate the problem of uneven temperature distribution inside the energy storage battery and improve its service life.

[0006] To achieve the above objectives, the technical solution of the present invention is:

[0007] A temperature control system based on quasi-isothermal compression refrigeration includes a refrigeration cycle unit and a liquid cooling plate heat exchange unit connected to the refrigeration cycle unit, the refrigeration cycle unit includes an evaporator, the liquid cooling plate heat exchange unit includes a heat exchanger, the evaporator and the heat exchanger are in contact and connected to realize heat exchange, and an intelligent control unit is electrically connected to the refrigeration cycle unit and the liquid cooling plate heat exchange unit to control the operation of the refrigeration cycle unit and the liquid cooling plate heat exchange unit.

[0008] Furthermore, the refrigeration cycle unit includes a refrigeration compressor, a condenser, a throttling device, and an evaporator. The outlet of the refrigeration compressor is connected to the inlet of the condenser through a pipeline, the outlet of the condenser is connected to the inlet of the throttling device through a pipeline, the outlet of the throttling device is connected to the inlet of the evaporator through a pipeline, and the outlet of the evaporator is connected to the inlet of the refrigeration compressor through a pipeline.

[0009] Furthermore, a porous medium is provided at the piston of the refrigeration compressor, and a liquid is filled in the compression chamber of the refrigeration compressor. The liquid is cooling oil or other liquid with heat storage and heat conductivity properties. The input into the refrigeration compressor is a low-temperature and low-pressure gaseous working medium. The quasi-isothermal refrigeration compressor combines a traditional piston with a porous medium to form an isothermal piston, and injects a small amount of liquid into the compression chamber to form a gas-liquid-solid coupling structure to enhance heat transfer during the compression process. The liquid absorbs a large amount of compression heat through the porous medium, and quickly exchanges heat with the outside world through liquid circulation to dissipate heat; while ensuring the exhaust pressure of the refrigeration compressor, its exhaust temperature is effectively reduced, reducing the energy consumption of the refrigeration compressor.

[0010] Furthermore, the throttling device includes but is not limited to a throttling valve, an expansion valve or other devices for achieving a change in the flow rate of the refrigerant.

[0011] Furthermore, the liquid cooling plate heat exchange unit includes a circulation pump, a heat exchanger, a liquid storage device, a liquid replenishing pump, and an energy storage battery liquid cooling plate. The energy storage battery liquid cooling plate is filled with coolant, and the energy storage battery is installed on the energy storage battery liquid cooling plate. The outlet of the energy storage battery liquid cooling plate is connected to the water suction port of the circulation pump through a pipeline, the water outlet of the circulation pump is connected to the inlet of the heat exchanger through a pipeline, and the outlet of the heat exchanger is connected to the inlet of the energy storage battery liquid cooling plate.

[0012] Furthermore, the heat exchanger includes but is not limited to a plate heat exchanger, a fin heat exchanger or other devices for achieving heat exchange.

[0013] Furthermore, the energy storage battery liquid cooling plate is filled with a coolant including but not limited to water, ethanol or other liquids capable of achieving heat transfer, and the liquid stored in the liquid storage device is consistent with the type and concentration of the liquid filled in the energy storage battery liquid cooling plate.

[0014] Furthermore, a rehydration pump is connected to the pipeline between the heat exchanger outlet and the energy storage battery liquid cooling plate inlet, the water outlet of the rehydration pump is connected to the pipeline connecting the heat exchanger outlet and the energy storage battery liquid cooling plate inlet, and the water suction port of the rehydration pump is connected to the liquid storage device.

[0015] Furthermore, the intelligent control unit includes sensors, a host computer, and a computer monitoring system. A pressure sensor and a temperature sensor are provided on the refrigeration compressor. The information collected by the sensors on the refrigeration compressor includes the pressure and temperature of the refrigerant before and after compression by the refrigeration compressor; a temperature sensor and a flow sensor are provided on the heat exchanger. The sensor on the heat exchanger collects the inlet and outlet temperatures and flow rates of the heat exchanger. A liquid level gauge sensor is provided on the liquid storage device to detect the liquid level of the liquid storage device. A temperature sensor is provided on the energy storage battery liquid cold plate to detect the inlet and outlet temperatures and flow rates of the energy storage battery liquid cold plate; the data monitored by each sensor is transmitted to the computer monitoring system, and the computer monitoring system analyzes the collected parameter information to determine the working status of the refrigeration cycle unit and the liquid cold plate heat exchange unit; the host computer issues a control instruction according to the determined working status to control the start and stop of each device in the system.

[0016] A method for designing a flow channel of the temperature control system, characterized in that the method comprises the following steps:

[0017] S1: Simulate the heat dissipation of the energy storage battery during operation by heat dissipation simulation software to obtain a heat dissipation distribution diagram of the entire energy storage battery, wherein the heat dissipation distribution diagram is marked with the area with the highest temperature, the area with a higher temperature, and the area with a lower temperature of the energy storage battery;

[0018] S2: Analyze the difficulty of heat dissipation of the energy storage battery according to the heat dissipation distribution diagram obtained in step S1, and the area with the highest temperature of the energy storage battery is the area with the most difficulty in heat dissipation;

[0019] S3: Based on the analysis results of step S3, the density of the flow channel layout of the energy storage battery liquid cooling plate is designed. For the parts of the liquid cooling plate that are in direct contact with the area with the highest temperature of the energy storage battery, the flow channel layout of the parts of the liquid cooling plate can be denser than the flow channel layout of other parts of the liquid cooling plate.

[0020] The beneficial effects of the present invention are:

[0021] 1. In the present invention, the piston of the refrigeration compressor is an isothermal piston formed by combining a traditional piston with a porous medium. The porous medium forms a gas-liquid-solid coupling structure in the refrigeration compressor, thereby enhancing heat transfer during the compression process and achieving quasi-isothermal compression. The liquid absorbs a large amount of compression heat through the porous medium and quickly exchanges heat with the outside world through liquid circulation to dissipate heat. While ensuring the exhaust pressure of the refrigeration compressor, its exhaust temperature is effectively reduced, thereby reducing the energy consumption of the refrigeration compressor, improving the efficiency of the energy storage battery temperature control system, and ensuring the efficient and stable operation of the energy storage battery temperature control system.

[0022] 2. The present invention optimizes the flow channel density of the liquid cooling plate of the energy storage battery according to the regional heat dissipation difficulty of the energy storage battery, effectively alleviating the problem of uneven temperature distribution inside the energy storage battery and improving its service life. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 Schematic diagram of the structure of a liquid cooling plate temperature control system based on a quasi-isothermal vapor compression refrigeration cycle in an embodiment of the present invention.

[0024] Figure 2 The present invention is a flow chart of the temperature control system design based on flow channel density optimization.

[0025] Among them: refrigeration compressor 1; condenser 2; throttling device 3; evaporator 4; circulation pump 5; heat exchanger 6; liquid storage device 7; liquid replenishment pump 8, energy storage battery liquid cooling plate 9; intelligent control unit 10. DETAILED DESCRIPTION

[0026] In order to make the purpose, technical solutions and advantages of the invention clearer, the present invention is further described below with reference to the accompanying drawings.

[0027] A temperature control system based on quasi-isothermal compression refrigeration, such as Figure 1 As shown, it includes a refrigeration cycle unit, a liquid cooling plate heat exchange unit and an intelligent control unit 10, wherein:

[0028] The refrigeration cycle unit includes a refrigeration compressor 1, a condenser 2, a throttling device 3, and an evaporator 4. The refrigeration compressor 1, the condenser 2, the throttling device 3, and the evaporator 4 are connected through a pipeline. The outlet of the refrigeration compressor 1 is connected to the inlet of the condenser 2 through a pipeline, the outlet of the condenser 2 is connected to the inlet of the throttling device 3 through a pipeline, the outlet of the throttling device 3 is connected to the inlet of the evaporator 4 through a pipeline, and the outlet of the evaporator 4 is connected to the inlet of the refrigeration compressor 1 through a pipeline.

[0029] In the refrigeration cycle unit, heat is absorbed and cold is transferred by the change of the physical state of the refrigerant between the components. The input into the refrigeration compressor is a low-temperature, low-pressure gaseous working medium, which is converted into a high-temperature, high-pressure gaseous working medium by the refrigeration compressor 1. The low-temperature, low-pressure gaseous working medium can be oxygen, helium, neon, etc. The high-temperature, high-pressure gaseous working medium enters the condenser 2 through a pipeline, dissipates heat to the outside through the condenser 2 and liquefies, and becomes a medium-temperature, high-pressure liquid in the condenser 2. The medium-temperature, high-pressure liquid enters the throttling device 3 through a pipeline, and becomes a low-temperature, low-pressure liquid in the throttling device 3. The low-temperature, low-pressure liquid enters the evaporator 4 through a pipeline, and finally generates heat exchange with the heat exchanger 6 in the liquid cold plate heat exchange unit through the evaporator 4, absorbs heat, transfers cold and becomes a low-temperature, low-pressure gaseous state, and begins to enter the next cycle.

[0030] Refrigeration compressor 1 combines a traditional piston with a porous medium to form an isothermal piston. The porous medium is a common space occupied by multiphase substances, and is also a combination of multiphase substances coexisting. The part of the space without a solid skeleton is called a pore, which is jointly occupied by liquid or gas or gas-liquid. Relative to one of the phases, the other phases are dispersed in it, and the solid phase is used as the solid skeleton. Some of the cavities that constitute the void space are interconnected. A porous medium is set at the piston at the outlet of the refrigeration compressor 1 to delay the flow rate of the high-temperature and high-pressure gas discharged from the refrigeration compressor 1 and enhance heat dissipation. A small amount of liquid is injected into the compression chamber of the refrigeration compressor 1, and a gas-liquid-solid coupling structure is formed in the refrigeration compressor 1 to enhance heat transfer during the compression process. The liquid absorbs a large amount of compression heat through the porous medium, and quickly generates heat exchange and heat dissipation with the outside world through liquid circulation; while ensuring the exhaust pressure of the refrigeration compressor, its exhaust temperature is effectively reduced, reducing the energy consumption of the refrigeration compressor.

[0031] A small amount of liquid is injected into the refrigeration compressor 1, including but not limited to cooling oil and other liquids with good heat storage and heat conductivity properties.

[0032] The condenser 2 should maintain a proper temperature difference with the outside when dissipating heat and condensing to the outside; and should have a proper tube length and heat exchange area to ensure matching with the flow rate of the refrigerant.

[0033] The throttling device 3 is used to adjust the flow rate of the refrigerant in the cycle, and includes but is not limited to devices such as throttling valves and expansion valves to achieve changes in the flow rate of the refrigerant. After the medium-temperature and high-pressure liquid in the condenser 2 enters the throttling device 3, the throttling device 3 can slow down the flow rate of the liquid in the device, which is beneficial to the heat dissipation of the liquid.

[0034] The liquid cooling plate heat exchange unit includes a circulation pump 5, a heat exchanger 6, a liquid storage device 7, a liquid replenishing pump 8, and an energy storage battery liquid cooling plate 9. The energy storage battery liquid cooling plate 9 absorbs the heat generated by the energy storage battery. The circulation pump 5 drives the liquid in the flow channel to flow, enter the heat exchanger 6, and generate heat exchange with the evaporator in the refrigeration cycle unit, absorb cold energy, and transfer heat.

[0035] In the liquid cooling plate heat exchange unit, the energy storage battery liquid cooling plate 9 is filled with coolant, the energy storage battery is installed on the energy storage battery liquid cooling plate 9, the outlet of the energy storage battery liquid cooling plate 9 is connected to the water suction port of the circulation pump 5 through a pipeline, the water outlet of the circulation pump 5 is connected to the inlet of the heat exchanger 6 through a pipeline, the outlet of the heat exchanger 6 is connected to the inlet of the energy storage battery liquid cooling plate 9, a liquid replenishment pump 8 is arranged on the pipeline between the outlet of the heat exchanger 6 and the inlet of the energy storage battery liquid cooling plate 9, the water outlet of the liquid replenishment pump 8 is connected to the pipeline connecting the outlet of the heat exchanger 6 and the inlet of the energy storage battery liquid cooling plate 9, and the water suction port of the liquid replenishment pump 8 is connected to the liquid storage device 7.

[0036] The heat exchanger 6 includes but is not limited to a plate heat exchanger, a fin heat exchanger and other devices for achieving heat exchange.

[0037] In the liquid cooling plate heat exchange unit, the circulating liquid includes but is not limited to water, ethanol and other liquids with good specific heat capacity and capable of heat transfer.

[0038] The intelligent control unit 10 collects relevant data parameters of the refrigeration cycle unit and the liquid cold plate heat exchange unit, and adjusts the operating state of the control system. The intelligent control unit 10 includes sensors, a host computer, and a computer monitoring system; a pressure sensor and a temperature sensor are set on the refrigeration compressor 1, and the sensor on the refrigeration compressor 1 collects parameter information including the pressure and temperature of the refrigerant before and after the refrigeration compressor is compressed. A temperature sensor and a flow sensor are set on the heat exchanger 6, and the sensor on the heat exchanger 6 collects the inlet and outlet temperature and flow of the heat exchanger, a liquid level meter sensor is set on the liquid storage device 7 to detect the liquid level of the liquid storage device, and a temperature sensor is set on the energy storage battery liquid cold plate 9 to detect the inlet and outlet temperature and flow of the energy storage battery liquid cold plate; the data monitored by each sensor is transmitted to the computer monitoring system by wired or wireless means, and the computer monitoring system analyzes the collected parameter information to determine the working state of the refrigeration cycle unit and the liquid cold plate heat exchange unit; the host computer issues a control instruction according to the determined working state to control the start and stop of each device in the system.

[0039] The liquid stored in the liquid storage device 7 is consistent with the circulating liquid in terms of type, concentration and other characteristics. According to the instruction of the intelligent control unit 10, when the liquid is insufficient during the circulation of the liquid cooling plate heat exchange unit, the liquid storage device 7 controls the liquid replenishing pump 8 to work, and replenishes the coolant into the circulation pipeline of the liquid cooling plate heat exchange unit through the liquid replenishing pump 8.

[0040] The cooling cycle of the energy storage battery of the present invention is as follows:

[0041] The energy storage battery liquid cooling plate 9 absorbs the heat generated by the energy storage battery, so that the temperature of the energy storage battery is reduced, and the temperature of the liquid in the energy storage battery liquid cooling plate 9 is increased. When the liquid with increased temperature in the energy storage battery liquid cooling plate 9 flows along the pipeline to the heat exchanger 6, since the heat exchanger 6 is connected to the evaporator 4, in a specific embodiment, the heat exchanger 6 can be in contact with the evaporator 4. The temperature of the liquid in the heat exchanger 6 is relatively high, and the evaporator 4 is a low-temperature and low-pressure liquid. The heat exchanger 6 and the evaporator 4 generate heat exchange to reduce the temperature of the liquid in the heat exchanger 6. The liquid with reduced temperature in the heat exchanger 6 flows along the pipeline to the energy storage battery liquid cooling plate 9 to realize cyclic cooling of the energy storage battery. After the evaporator 4 and the heat exchanger 6 complete the heat exchange, the low-temperature and low-pressure liquid in the evaporator 4 is vaporized into a low-temperature and low-pressure gas. The vaporized low-temperature and low-pressure gas in the evaporator 4 flows through the pipeline to the refrigeration compressor 1 for cyclic use.

[0042] A flow channel optimization design method for a temperature control system based on quasi-isothermal compression refrigeration, the design flow chart is as follows: Figure 2 As shown, based on the difficulty of regional heat dissipation of energy storage batteries, the density of the flow channel layout of the energy storage battery liquid cooling plate is optimized.

[0043] The flow channel optimization design method of the liquid cooling plate temperature control system based on the quasi-isothermal vapor compression refrigeration cycle comprises the following steps:

[0044] S1: Simulate the heat dissipation of the energy storage battery during operation by heat dissipation simulation software to obtain a heat dissipation distribution diagram of the entire energy storage battery, wherein the heat dissipation distribution diagram is marked with the area with the highest temperature, the area with a higher temperature, and the area with a lower temperature of the energy storage battery. Areas with different temperatures can be marked with different colors on the heat dissipation distribution diagram;

[0045] S2: Analyze the difficulty of heat dissipation of the energy storage battery according to the heat dissipation distribution diagram obtained in step S1, and the area with the highest temperature of the energy storage battery is the area with the most difficulty in heat dissipation;

[0046] S3: Based on the analysis results of step S3, the density of the flow channel layout of the energy storage battery liquid cooling plate is designed.

[0047] The energy storage battery is installed on the liquid cooling plate, and some parts of the liquid cooling plate are in direct contact with the parts with the highest temperature of the energy storage battery, and other parts of the liquid cooling plate are in direct contact with the parts with higher or lower temperatures of the energy storage battery. For the parts of the liquid cooling plate that are in direct contact with the areas with the highest temperature of the energy storage battery, the flow channel layout of the parts of the liquid cooling plate can be more dense, for example, the flow channels of the parts of the liquid cooling plate that are in contact with the areas with the highest temperature of the energy storage battery can be arranged in a ring or curve shape to increase the flow time of the coolant in the parts and enhance the heat dissipation effect of the areas with the highest temperature of the energy storage battery.

[0048] Finally, it should be noted that the contents not described in detail in this specification belong to the prior art known to professional and technical personnel in this field. The above description is only the preferred embodiment of the present invention and is not used to limit the present invention. Although the present invention is described in detail with reference to the aforementioned embodiments, it is still possible for those skilled in the art to modify the technical solutions recorded in the aforementioned embodiments, or to replace some of the technical features therein by equivalents. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A temperature control system based on quasi-isothermal compression refrigeration, comprising a refrigeration cycle unit, characterized in that: It also includes a liquid cooling plate heat exchange unit connected to the refrigeration cycle unit, the refrigeration cycle unit includes an evaporator (4), the liquid cooling plate heat exchange unit includes a heat exchanger (6), the evaporator (4) and the heat exchanger (6) are in contact and connected to achieve heat exchange, and the intelligent control unit (10) is electrically connected to the refrigeration cycle unit and the liquid cooling plate heat exchange unit to control the operation of the refrigeration cycle unit and the liquid cooling plate heat exchange unit.

2. A temperature control system based on quasi-isothermal compression refrigeration according to claim 1, characterized in that: The refrigeration cycle unit comprises a refrigeration compressor (1), a condenser (2), a throttling device (3), and an evaporator (4); the outlet of the refrigeration compressor (1) is connected to the inlet of the condenser (2) via a pipeline, the outlet of the condenser (2) is connected to the inlet of the throttling device (3) via a pipeline, the outlet of the throttling device (3) is connected to the inlet of the evaporator (4) via a pipeline, and the outlet of the evaporator (4) is connected to the inlet of the refrigeration compressor (1) via a pipeline.

3. A temperature control system based on quasi-isothermal compression refrigeration according to claim 2, characterized in that: A porous medium is provided at the piston of the refrigeration compressor (1), and a liquid is filled in the compression chamber of the refrigeration compressor (1), wherein the liquid is cooling oil or other liquid with heat storage and heat conduction properties.

4. A temperature control system based on quasi-isothermal compression refrigeration according to claim 2, characterized in that: The throttling device (3) includes but is not limited to a throttling valve, an expansion valve or other devices for achieving a change in the flow rate of the refrigerant.

5. The temperature control system based on quasi-isothermal compression refrigeration according to claim 1, characterized in that: The liquid cooling plate heat exchange unit comprises a circulation pump (5), a heat exchanger (6), a liquid storage device (7), a liquid replenishing pump (8), and an energy storage battery liquid cooling plate (9). The energy storage battery liquid cooling plate (9) is filled with cooling liquid. The energy storage battery is mounted on the energy storage battery liquid cooling plate (9). The outlet of the energy storage battery liquid cooling plate (9) is connected to the water suction port of the circulation pump (5) through a pipeline. The water outlet of the circulation pump (5) is connected to the inlet of the heat exchanger (6) through a pipeline. The outlet of the heat exchanger (6) is connected to the inlet of the energy storage battery liquid cooling plate (9).

6. A temperature control system based on quasi-isothermal compression refrigeration according to claim 5, characterized in that: The heat exchanger (6) includes but is not limited to a plate heat exchanger, a fin heat exchanger or other devices for achieving heat exchange.

7. The temperature control system based on quasi-isothermal compression refrigeration according to claim 5, characterized in that: The energy storage battery liquid cooling plate (9) is filled with a cooling liquid including but not limited to water, ethanol or other liquids capable of achieving heat transfer, and the liquid stored in the liquid storage device (7) is consistent in type and concentration with the liquid filled in the energy storage battery liquid cooling plate (9).

8. The temperature control system based on quasi-isothermal compression refrigeration according to claim 5, characterized in that: A rehydration pump (8) is connected to the pipeline between the outlet of the heat exchanger (6) and the inlet of the energy storage battery liquid cooling plate (9); the water outlet of the rehydration pump (8) is connected to the pipeline connecting the outlet of the heat exchanger (6) and the inlet of the energy storage battery liquid cooling plate (9); and the water suction port of the rehydration pump (8) is connected to the liquid storage device (7).

9. The temperature control system based on quasi-isothermal compression refrigeration according to claim 1, characterized in that: The intelligent control unit (10) includes a sensor, a host computer, and a computer monitoring system. A pressure sensor and a temperature sensor are provided on the refrigeration compressor (1). The information collected by the sensor on the refrigeration compressor (1) includes the pressure and temperature of the refrigerant before and after compression by the refrigeration compressor. A temperature sensor and a flow sensor are provided on the heat exchanger (6). The sensor on the heat exchanger (6) collects the inlet and outlet temperatures and flow rates of the heat exchanger. A liquid level meter sensor is provided on the liquid storage device (7) to detect the liquid level of the liquid storage device. A temperature sensor is provided on the energy storage battery liquid cooling plate (9) to detect the inlet and outlet temperatures and flow rates of the energy storage battery liquid cooling plate. The data monitored by each sensor is transmitted to the computer monitoring system, and the computer monitoring system analyzes the collected parameter information to determine the working status of the refrigeration cycle unit and the liquid cooling plate heat exchange unit; the host computer issues a control instruction according to the determined working status to control the start and stop of each device in the system.

10. A method for designing a flow channel of a temperature control system according to any one of claims 1 to 9, characterized in that: The method comprises the following steps: S1: Simulate the heat dissipation of the energy storage battery during operation by heat dissipation simulation software to obtain a heat dissipation distribution diagram of the entire energy storage battery, wherein the heat dissipation distribution diagram is marked with the area with the highest temperature, the area with a higher temperature, and the area with a lower temperature of the energy storage battery; S2: Analyze the difficulty of heat dissipation of the energy storage battery according to the heat dissipation distribution diagram obtained in step S1, and the area with the highest temperature of the energy storage battery is the area with the most difficulty in heat dissipation; S3: Based on the analysis results of step S3, the density of the flow channel layout of the energy storage battery liquid cooling plate is designed. For the parts of the liquid cooling plate that are in direct contact with the area with the highest temperature of the energy storage battery, the flow channel layout of the parts of the liquid cooling plate can be denser than the flow channel layout of other parts of the liquid cooling plate.

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