Energy storage high-voltage direct-current liquid cooling decoupling temperature control system

Abstract

The application relates to the technical field of heat exchange and temperature control, and provides a high-voltage direct-current liquid cooling decoupling temperature control system with energy storage, which comprises a refrigerant circulation loop, an evaporator, a first cold carrier circulation loop, a liquid storage tank and a second cold carrier circulation loop. The evaporator is connected with the refrigerant circulation loop. The first cold carrier circulation loop is connected with the evaporator and the liquid storage tank, the first cold carrier circulation loop is used for extracting the cold carrier from the liquid storage tank and conveying the cold carrier to the evaporator, and is also used for receiving the cold carrier from the evaporator and conveying the cold carrier to the liquid storage tank. The second cold carrier circulation loop is connected with the liquid storage tank and a product, the second cold carrier circulation loop is used for extracting the cold carrier from the liquid storage tank, conveying the extracted cold carrier to the product, receiving the cold carrier output by the product, and conveying the received cold carrier to the liquid storage tank. The application has the effect of avoiding the influence of temperature change of the product on the circulation stability of the cold carrier.

Description

Technical Field

[0001] This application relates to the field of heat exchange and temperature control technology, and proposes an energy storage high-voltage DC liquid cooling decoupled temperature control system. Background Technology

[0002] In industrial production and daily life, precise temperature control is crucial for the stable operation of many devices and systems. Traditional temperature control systems typically employ a single-cycle approach to control the temperature of products (such as the temperature control piping of automotive battery cells). One common method is to directly connect the refrigerant circulation loop to the product, regulating its temperature through direct heat exchange. Another method utilizes a refrigerant circulation loop, where the refrigerant circulates between the product and the refrigeration equipment, carrying away or transferring heat from the product. Some systems use water as the refrigerant, using its circulation to control product temperature. However, existing temperature control systems have significant drawbacks. In traditional systems, the product is directly linked to the refrigerant circulation loop, and changes in the product's temperature directly affect the refrigerant's circulation speed. Large temperature fluctuations in the product lead to instability in the refrigerant circulation, consequently affecting the performance and stability of the entire temperature control system, making precise temperature control difficult to achieve.

[0003] The aforementioned technologies have the drawback that temperature changes in the product directly affect the cyclic stability of the refrigerant. Summary of the Invention

[0004] To prevent temperature changes in the product from affecting the circulation rate of the refrigerant, this application provides an energy storage high-voltage DC liquid-cooled decoupled temperature control system.

[0005] The energy storage high-voltage DC liquid-cooled decoupled temperature control system provided in this application adopts the following technical solution: A high-voltage direct current liquid-cooled decoupled temperature control system for energy storage includes: A refrigerant circulation loop has an internal path for the refrigerant to circulate. An evaporator is connected to the refrigerant circulation loop, the evaporator being used to receive the refrigerant from the refrigerant circulation loop and to supply the refrigerant to the refrigerant circulation loop; A first refrigerant circulation loop is connected to the evaporator and the storage tank. The first refrigerant circulation loop has a path for the refrigerant to circulate. The first refrigerant circulation loop is used to draw the refrigerant from the storage tank, deliver the refrigerant drawn from the storage tank to the evaporator, receive the refrigerant from the evaporator, and deliver the refrigerant received from the evaporator to the storage tank. A liquid storage tank for containing the refrigerant; The second refrigerant circulation loop is connected to the liquid storage tank and the product. The second refrigerant circulation loop is used to draw refrigerant from the liquid storage tank, deliver the refrigerant drawn from the liquid storage tank to the product, receive the refrigerant output from the product, and deliver the refrigerant output from the product to the liquid storage tank; wherein, the refrigerant in the evaporator is used to exchange heat with the refrigerant in the evaporator.

[0006] By adopting the above technical solution, the liquid receiver tank acts as a buffer tank, ensuring that the hydraulic operations of the first and second refrigerant circulation loops do not interfere with each other. When the flow rate or pressure on the product side (second refrigerant circulation loop) fluctuates drastically due to process requirements, it will not directly impact the evaporator side (first refrigerant circulation loop), thus ensuring the stability of the refrigeration unit's operation. The water in the liquid receiver tank has significant thermal inertia, which can smooth temperature fluctuations, prevent frequent compressor start-stops, and extend equipment life.

[0007] Optionally, the refrigerant circulation loop includes a compressor, a condenser, and an electronic expansion valve. The first end of the compressor is connected to the first interface of the evaporator, the second end of the compressor is connected to the first end of the condenser, the second end of the condenser is connected to the first end of the electronic expansion valve, and the second end of the electronic expansion valve is connected to the second interface of the evaporator.

[0008] By adopting the above technical solutions, compared with thermostatic expansion valves or capillary tubes, electronic expansion valves (EEVs) can adjust refrigerant flow more quickly and accurately, adapt to a wide range of load changes, and improve the system's part-load energy efficiency. Electronic expansion valves can also better control superheat and prevent compressor liquid slugging.

[0009] Optionally, the refrigerant circulation loop further includes an inlet pressure sensor, an inlet temperature sensor, and an inlet needle valve, wherein the inlet pressure sensor, the inlet temperature sensor, and the inlet needle valve are all disposed on the pipeline between the compressor and the evaporator.

[0010] By adopting the above technical solution, combining pressure data from the intake pressure sensor and temperature data from the intake temperature sensor, the intake superheat can be calculated in real time and fed back to the electronic expansion valve for precise adjustment, ensuring optimal energy efficiency. The intake needle valve provides a maintenance interface for easy refrigerant charging or vacuum extraction, and also facilitates connection to instruments for fault diagnosis.

[0011] Optionally, the refrigerant circulation loop further includes an exhaust temperature sensor, an exhaust pressure sensor, and an exhaust needle valve, wherein the exhaust temperature sensor, the exhaust pressure sensor, and the exhaust needle valve are all disposed on the loop between the compressor and the condenser.

[0012] By employing the above technical solution, exhaust temperature and high pressure are monitored in real time using exhaust temperature and pressure sensors to prevent compressor overheating and burnout or system overpressure explosion, triggering a protective shutdown. Analyzing exhaust parameters helps determine if the condenser is clogged or if the fan is malfunctioning.

[0013] Optionally, the first refrigerant circulation loop includes a first water pump, a first end of the first water pump being connected to a second interface of the liquid storage tank, a second end of the first water pump being connected to a third interface of the evaporator, and a fourth interface of the evaporator being connected to a first interface of the liquid storage tank.

[0014] By adopting the above technical solution, the first water pump is specifically responsible for overcoming the resistance of the evaporator and pipeline, ensuring that the cold energy stored in the tank is continuously generated, maintaining the turbulent heat exchange efficiency in the evaporator, and preventing the evaporator from freezing.

[0015] Optionally, the first refrigerant circulation loop further includes a first three-way valve, a second three-way valve, a natural cooling radiator, and an ambient temperature sensor. The first three-way valve is located between the liquid storage tank and the evaporator. The first end of the first three-way valve is connected to the first interface of the liquid storage tank, and the second end of the first three-way valve is connected to the fourth interface of the evaporator. The second three-way valve is located between the first water pump and the evaporator. The first end of the second three-way valve is connected to the second end of the first water pump, and the second end of the second three-way valve is connected to the third interface of the evaporator. The first end of the natural cooling radiator is connected to the third end of the first three-way valve, and the second end of the natural cooling radiator is connected to the third end of the second three-way valve. The ambient temperature sensor is mounted on the natural cooling radiator.

[0016] By adopting the above technical solution, when the ambient temperature is lower than the set value (such as in winter or transitional seasons), the system can switch between the first three-way valve and the second three-way valve, utilizing the low-temperature outdoor air to directly cool the refrigerant through the natural cooling radiator, thereby reducing or even stopping the compressor's operation and significantly reducing power consumption. Through the cooperation of the first three-way valve, the second three-way valve, and the ambient temperature sensor, the system can automatically switch between mechanical refrigeration, natural cooling, or hybrid cooling modes.

[0017] Optionally, the energy storage high-voltage DC liquid cooling decoupled temperature control system further includes a heat dissipation fan, which is connected to the condenser and the natural cooling radiator, and is used to dissipate heat from the condenser and the natural cooling radiator.

[0018] By adopting the above technical solution, the condenser and natural cooling radiator share the same fan, reducing the size and floor space of the equipment. It also reduces the number of motors and the complexity of the control circuitry, thereby lowering manufacturing costs.

[0019] Optionally, the second refrigerant circulation loop includes a second water pump and an electric heater. The first end of the second water pump is connected to the fourth interface of the storage tank, and the second end of the second water pump is used to connect to the product. The first end of the electric heater is connected to the third interface of the storage tank, and the second end of the electric heater is used to connect to the product. The refrigerant flowing out of the storage tank flows sequentially through the electric heater, the product, and the second water pump before flowing into the storage tank.

[0020] By adopting the above technical solution, the addition of an electric heater enables the system to have heating capabilities, which is crucial for products requiring constant temperature (neither too hot nor too cold), thus improving temperature control accuracy. The second water pump is independently controlled, and the flow rate can be adjusted according to the specific needs of the product without affecting the cooling efficiency of the primary side.

[0021] Optionally, the second refrigerant circulation loop further includes an automatic vent valve, a return liquid temperature sensor, a return liquid pressure sensor, a supply liquid temperature sensor, and a supply liquid pressure sensor. The automatic vent valve is installed on the pipeline between the second water pump and the storage tank. The return liquid temperature sensor and the return liquid pressure sensor are both installed on the pipeline between the second water pump and the product. The supply liquid temperature sensor and the supply liquid pressure sensor are both installed on the pipeline between the electric heater and the product.

[0022] By adopting the above technical solutions, the supply water temperature sensor and return water temperature sensor provide the data basis for calculating the load heat load, which facilitates the precise control of heater power or water pump speed by the PID algorithm. The pressure sensor can monitor whether the pipeline is leaking (underpressure) or blocked (overpressure), and the automatic air vent valve prevents cavitation, protects the water pump, and ensures heat exchange efficiency.

[0023] Optionally, the energy storage high-voltage DC liquid-cooled decoupled temperature control system further includes a liquid replenishment and pressure stabilization circuit. The liquid replenishment and pressure stabilization circuit includes a safety valve, a liquid replenishment tank, a liquid replenishment pump, and a check valve. The first end of the safety valve is connected to the first end of the second water pump, the second end of the safety valve is connected to the first end of the liquid replenishment tank, the second end of the liquid replenishment tank is connected to the first end of the liquid replenishment pump, the second end of the liquid replenishment pump is connected to the first end of the check valve, and the second end of the check valve is connected to the second end of the second water pump.

[0024] By adopting the above technical solution, the refrigerant replenishment and pressure stabilization circuit ensures that the system is always under positive pressure, preventing outside air from being drawn into the pipeline and causing air blockage or corrosion. When a minor leak occurs or the system needs maintenance and drainage, it can automatically replenish the refrigerant, enabling unattended operation. The safety valve automatically opens to relieve pressure when the system pressure abnormally increases, preventing pipeline rupture.

[0025] In summary, this application includes at least one of the following beneficial technical effects: 1. The liquid receiver tank acts as a buffer, ensuring that the hydraulic operations of the first and second refrigerant circulation loops do not interfere with each other. When the flow rate or pressure on the product side (second refrigerant circulation loop) fluctuates drastically due to process requirements, it will not directly impact the evaporator side (first refrigerant circulation loop), thus guaranteeing the stability of the refrigeration unit's operation. The water in the liquid receiver tank has significant thermal inertia, which helps smooth temperature fluctuations, prevents frequent compressor start-stop cycles, and extends equipment life. 2. Compared to thermostatic expansion valves or capillary tubes, electronic expansion valves (EEVs) can regulate refrigerant flow more quickly and accurately, adapting to a wide range of load changes and improving the system's part-load efficiency. Electronic expansion valves also provide better control over superheat, preventing compressor liquid slugging. 3. By combining pressure data from the intake pressure sensor and temperature data from the intake temperature sensor, the intake superheat can be calculated in real time and fed back to the electronic expansion valve for precise adjustment, ensuring optimal energy efficiency. The intake needle valve provides a maintenance interface for easy refrigerant charging or vacuum extraction, and also facilitates connection to instruments for fault diagnosis. 4. When the ambient temperature is lower than the set value (such as in winter or transitional seasons), the system can switch between the first three-way valve and the second three-way valve to utilize the low-temperature outdoor air to directly cool the refrigerant through the natural cooling radiator, thereby reducing or even stopping the compressor's operation and significantly reducing power consumption. Through the cooperation of the first three-way valve, the second three-way valve, and the ambient temperature sensor, the system can automatically switch between mechanical refrigeration, natural cooling, or hybrid cooling modes. Attached Figure Description

[0026] Figure 1 This is a schematic diagram of the structure of an energy storage high-voltage DC liquid-cooled decoupled temperature control system according to an embodiment of this application; Figure 2 This is a high-voltage power distribution diagram of an energy storage high-voltage DC liquid-cooled decoupled temperature control system according to an embodiment of this application; Figure 3 This is a low-voltage control diagram of an energy storage high-voltage DC liquid-cooled decoupled temperature control system according to an embodiment of this application.

[0027] Explanation of reference numerals in the attached diagram: 100, Dual-cycle hydraulic refrigeration module; 10, Refrigerant circulation loop; 11, Inlet pressure sensor; 12, Inlet temperature sensor; 13, Inlet needle valve; 14, Compressor; 15, Exhaust temperature sensor; 16, Exhaust pressure sensor; 17, Exhaust needle valve; 18, Condenser; 19, Electronic expansion valve; 20, Evaporator; 30, First refrigerant circulation loop; 31, First three-way valve; 32, Second three-way valve; 33, Natural cooling radiator; 34, Ambient temperature sensor; 35, First water pump; 40, Storage... 50. Liquid tank; 51. Second refrigerant circulation loop; 52. Automatic vent valve; 53. Second water pump; 54. Return liquid temperature sensor; 55. Return liquid pressure sensor; 56. Supply liquid temperature sensor; 57. Supply liquid pressure sensor; 68. Electric heater; 69. Liquid replenishment and pressure regulating loop; 60. Safety valve; 61. Liquid level switch; 62. Liquid replenishment tank; 63. Liquid replenishment pump; 64. One-way valve; 70. Cooling fan; 200. High-voltage DC power distribution module; 300. Battery bus; 400. DC-DC step-down module; 500. Low-voltage control module. Detailed Implementation

[0028] The following combination Figures 1-3 This application will be described in further detail.

[0029] This application discloses an energy storage high-voltage DC liquid-cooled decoupled temperature control system.

[0030] Figure 1 This is a schematic diagram of the structure of an energy storage high-voltage direct current liquid-cooled decoupled temperature control system according to an embodiment of this application. (Refer to...) Figure 1The energy storage high-voltage DC liquid-cooled decoupled temperature control system includes a dual-cycle hydraulic refrigeration module 100. The dual-cycle hydraulic refrigeration module 100 includes a refrigerant circulation loop 10, an evaporator 20, a first refrigerant circulation loop 30, a liquid storage tank 40, a second refrigerant circulation loop 50, and a liquid replenishment and pressure regulating loop 60. The refrigerant circulation loop 10 is connected to the evaporator 20 and has an internal path for refrigerant circulation. The first refrigerant circulation loop 30 is connected to the evaporator 20 and has an internal path for refrigerant circulation. The refrigerant inside the evaporator 20 and the refrigerant can exchange heat. The first refrigerant circulation loop 30 is also connected to the liquid storage tank 40. The first refrigerant circulation loop 30 is used to draw refrigerant from the liquid storage tank 40 and transport the drawn refrigerant to the evaporator 20, so that the refrigerant exchanges heat with the refrigerant in the evaporator 20, and then transports the refrigerant back to the liquid storage tank 40 after heat exchange. The second refrigerant circulation loop 50 is connected to the liquid storage tank 40 and the product. The second refrigerant circulation loop 50 is used to transport the refrigerant in the liquid storage tank 40 to the product, so that the refrigerant exchanges heat with the product, and then transports the refrigerant back to the liquid storage tank 40 after heat exchange. The product can be a temperature control pipeline in a vehicle's power battery cell.

[0031] The refrigerant circulation loop 10 includes an intake pressure sensor 11, an intake temperature sensor 12, an intake needle valve 13, a compressor 14, an exhaust temperature sensor 15, an exhaust pressure sensor 16, an exhaust needle valve 17, a condenser 18, and an electronic expansion valve 19. The first end of the compressor 14 is connected to the first interface of the evaporator 20, the second end of the compressor 14 is connected to the first end of the condenser 18, the second end of the condenser 18 is connected to the first end of the electronic expansion valve 19, and the second end of the electronic expansion valve 19 is connected to the second interface of the evaporator 20.

[0032] An intake pressure sensor 11, an intake temperature sensor 12, and an intake needle valve 13 are installed on the pipeline between the compressor 14 and the evaporator 20. An exhaust temperature sensor 15, an exhaust pressure sensor 16, and an exhaust needle valve 17 are installed on the pipeline between the compressor 14 and the condenser 18. The condenser 18 is also connected to the cooling fan 70.

[0033] The first refrigerant circulation loop 30 includes a first three-way valve 31, a second three-way valve 32, a natural cooling radiator 33, an ambient temperature sensor 34, and a first water pump 35. The first end of the first three-way valve 31 is connected to the first interface of the liquid storage tank 40, and the second end of the first three-way valve 31 is connected to the fourth interface of the evaporator 20. The first end of the first water pump 35 is connected to the second interface of the liquid storage tank 40, the second end of the first water pump 35 is connected to the first end of the second three-way valve 32, and the second end of the second three-way valve 32 is connected to the third interface of the evaporator 20.

[0034] The first end of the natural cooling radiator 33 is connected to the third end of the first three-way valve 31, and the second end of the natural cooling radiator 33 is connected to the third end of the second three-way valve 32. The natural cooling radiator 33 is also connected to the cooling fan 70 through the condenser 18.

[0035] The second refrigerant circulation loop 50 includes an automatic vent valve 51, a second water pump 52, a return liquid temperature sensor 53, a return liquid pressure sensor 54, a supply liquid temperature sensor 55, a supply liquid pressure sensor 56, and an electric heater 57. The first end of the second water pump 52 is connected to the fourth interface of the storage tank 40, and the second end of the second water pump 52 is used to connect to the product. The automatic vent valve 51 is installed on the pipeline between the second water pump 52 and the storage tank 40. The return liquid temperature sensor 53 and the return liquid pressure sensor 54 are installed on the pipeline between the product and the second water pump 52.

[0036] The first end of the electric heater 57 is connected to the third interface of the liquid storage tank 40, and the second end of the electric heater 57 is used to connect to the product. The liquid supply temperature sensor 55 and the liquid supply pressure sensor 56 are installed on the pipeline between the product and the electric heater 57.

[0037] The replenishment and pressure control circuit 60 includes a safety valve 61, a level switch 62, a replenishment tank 63, a replenishment pump 64, and a check valve 65. The first end of the safety valve 61 is connected to the first end of the second water pump 52, the second end of the safety valve 61 is connected to the first interface of the replenishment tank 63, the second interface of the replenishment tank 63 is connected to the first end of the replenishment pump 64, the second end of the replenishment pump 64 is connected to the first end of the check valve 65, and the second end of the check valve 65 is connected to the second end of the second water pump 52. The level switch 62 is mounted on the replenishment tank 63.

[0038] The dual-cycle hydraulic decoupled temperature control system has the following working modes: compressor cooling mode, natural cooling mode, hybrid cooling mode, heating mode, and self-circulation mode.

[0039] The compressor cooling mode is suitable for scenarios requiring cooling in high-temperature environments during summer. In this mode, the natural cooling radiator 33 is not operating, the compressor 14 is operating, the first three-way valve 31 is adjusted so that its first and second ends are connected, and the second three-way valve 32 is adjusted so that its first and second ends are connected. Both the first water pump 35 and the second water pump 52 are operating, and the electric heater 57 is not operating.

[0040] The natural cooling mode is suitable for scenarios requiring cooling in winter environments. In this mode, the first three-way valve 31 is adjusted so that its first and third ends are connected, and the second three-way valve 32 is adjusted so that its first and third ends are connected. The compressor 14 is not operating, the electric heater 57 is not operating, the natural cooling radiator 33 is operating, the cooling fan 70 is operating, and the first water pump 35 and the second water pump 52 are operating.

[0041] The hybrid cooling mode is suitable for scenarios requiring cooling in spring and autumn environments. In this mode, the electric heater 57 is not operating, the compressor 14 is operating, the natural cooling radiator 33 is operating, the first water pump 35 is operating, the second water pump 52 is operating, and the cooling fan 70 is operating. The opening ratios of the first and second ends and the first and third ends of the first three-way valve 31, the first and second ends and the first and third ends of the second three-way valve 32, and the operating capacity of the compressor 14 are adjusted according to the difference between the required water temperature, the ambient temperature, and the actual water temperature.

[0042] The heating mode is suitable for scenarios requiring heating in winter environments. In this heating mode, the compressor 14 is not working, the natural cooling radiator 33 is not working, the first water pump 35 is not working, the second water pump 52 is working, the first three-way valve 31 is closed, the second three-way valve 32 is closed, and the heating capacity of the electric heater 57 is adjusted according to the required water temperature.

[0043] The self-circulation mode is suitable for scenarios where the battery cell temperature is uneven and needs to be uniformized when stationary. In the self-circulation mode, the electric heater 57 is not working, the compressor 14 is not working, the natural cooling radiator 33 is not working, the first water pump 35 is not working, the second water pump 52 is working, the first three-way valve 31 is closed, and the second three-way valve 32 is closed. The temperature difference of the product is adjusted to the required target through the circulation of the refrigerant.

[0044] Figure 2This is a high-voltage power distribution diagram of an energy storage high-voltage direct current liquid-cooled decoupled temperature control system according to an embodiment of this application. (Refer to...) Figure 2 The energy storage high-voltage DC liquid cooling decoupled temperature control system further includes a high-voltage DC power distribution module 200 and a battery bus 300. The high-voltage DC power distribution module 200 is connected to the battery bus 300, and is also connected to the compressor 14, the first water pump 35, the second water pump 52, the electric heater 57, the replenishment pump 64, and the cooling fan 70. The high-voltage DC power distribution module 200 is used to provide electrical energy to the compressor 14, the first water pump 35, the second water pump 52, the electric heater 57, the replenishment pump 64, and the cooling fan 70.

[0045] Figure 3 This is a low-voltage control diagram of a high-voltage DC liquid-cooled decoupled temperature control system for energy storage, according to an embodiment of this application. (Refer to...) Figure 3 The energy storage high-voltage DC liquid cooling decoupled temperature control system further includes a DC-DC step-down module 400 and a low-voltage control module 500. The DC-DC step-down module 400 is connected to the high-voltage DC power distribution module 200, and the DC-DC step-down module 400 is connected to the low-voltage control module 500. The low-voltage control module 500 is connected to the intake pressure sensor 11, the intake temperature sensor 12, the compressor 14, the exhaust temperature sensor 15, the exhaust pressure sensor 16, the electronic expansion valve 19, the first three-way valve 31, the second three-way valve 32, the ambient temperature sensor 34, the first water pump 35, the second water pump 52, the return liquid temperature sensor 53, the return liquid pressure sensor 54, the supply liquid temperature sensor 55, the supply liquid pressure sensor 56, the electric heater 57, the liquid level switch 62, the replenishment pump 64, and the cooling fan 70. The low-voltage control module 500 is used to collect parameters of the intake pressure sensor 11, the intake temperature sensor 12, the exhaust temperature sensor 15, the exhaust pressure sensor 16, the ambient temperature sensor 34, the return liquid temperature sensor 53, the return liquid pressure sensor 54, the supply liquid temperature sensor 55, the supply liquid pressure sensor 56, and the liquid level switch 62, and is used to control the compressor 14, the electronic expansion valve 19, the first three-way valve 31, the second three-way valve 32, the first water pump 35, the second water pump 52, the electric heater 57, the replenishment pump 64, and the cooling fan 70.

[0046] The implementation principle of the high-voltage direct current liquid-cooled decoupled temperature control system for energy storage according to this application embodiment is as follows: The liquid storage tank 40 acts as a buffer tank, ensuring that the hydraulic conditions of the first refrigerant circulation loop 30 and the second refrigerant circulation loop 50 do not interfere with each other. When the flow rate or pressure of the second refrigerant circulation loop 50 fluctuates drastically due to process requirements, it will not directly impact the first refrigerant circulation loop 30, thus ensuring the stability of the refrigeration unit's operation. The water in the liquid storage tank 40 has a large thermal inertia, which can smooth temperature fluctuations, prevent the compressor 14 from frequently starting and stopping, and extend the equipment's lifespan.

[0047] The above are all preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. A high-voltage direct current liquid-cooled decoupled temperature control system for energy storage, characterized in that, include: The refrigerant circulation loop (10) has an internal path for the refrigerant to circulate; An evaporator (20) is connected to the refrigerant circulation loop (10), the evaporator (20) being used to receive the refrigerant from the refrigerant circulation loop (10) and to supply the refrigerant to the refrigerant circulation loop (10); The first refrigerant circulation loop (30) is connected to the evaporator (20) and the liquid storage tank (40). The first refrigerant circulation loop (30) has a path for the refrigerant to circulate. The first refrigerant circulation loop (30) is used to draw the refrigerant from the liquid storage tank (40), transport the refrigerant drawn from the liquid storage tank (40) to the evaporator (20), receive the refrigerant from the evaporator (20), and transport the refrigerant received from the evaporator (20) to the liquid storage tank (40). Storage tank (40) for containing the refrigerant; The second refrigerant circulation loop (50) is connected to the liquid storage tank (40) and the product. The second refrigerant circulation loop (50) is used to draw the refrigerant from the liquid storage tank (40), deliver the refrigerant drawn from the liquid storage tank (40) to the product, receive the refrigerant output by the product, and deliver the refrigerant output by the product to the liquid storage tank (40). The refrigerant in the evaporator (20) is used to exchange heat with the refrigerant in the evaporator (20).

2. The energy storage high-voltage DC liquid-cooled decoupled temperature control system according to claim 1, characterized in that, The refrigerant circulation loop (10) includes a compressor (14), a condenser (18), and an electronic expansion valve (19). The first end of the compressor (14) is connected to the first interface of the evaporator (20), the second end of the compressor (14) is connected to the first end of the condenser (18), the second end of the condenser (18) is connected to the first end of the electronic expansion valve (19), and the second end of the electronic expansion valve (19) is connected to the second interface of the evaporator (20).

3. The energy storage high-voltage DC liquid-cooled decoupled temperature control system according to claim 2, characterized in that, The refrigerant circulation loop (10) also includes an intake pressure sensor (11), an intake temperature sensor (12), and an intake needle valve (13). The intake pressure sensor (11), the intake temperature sensor (12), and the intake needle valve (13) are all located on the pipeline between the compressor (14) and the evaporator (20).

4. The energy storage high-voltage DC liquid-cooled decoupled temperature control system according to claim 2, characterized in that, The refrigerant circulation loop (10) also includes an exhaust temperature sensor (15), an exhaust pressure sensor (16), and an exhaust needle valve (17). The exhaust temperature sensor (15), the exhaust pressure sensor (16), and the exhaust needle valve (17) are all located on the loop between the compressor (14) and the condenser (18).

5. The energy storage high-voltage DC liquid-cooled decoupled temperature control system according to claim 2, characterized in that, The first refrigerant circulation loop (30) includes a first water pump (35), the first end of the first water pump (35) is connected to the second interface of the liquid storage tank (40), the second end of the first water pump (35) is connected to the third interface of the evaporator (20), and the fourth interface of the evaporator (20) is connected to the first interface of the liquid storage tank (40).

6. The energy storage high-voltage DC liquid-cooled decoupled temperature control system according to claim 5, characterized in that, The first refrigerant circulation loop (30) also includes a first three-way valve (31), a second three-way valve (32), a natural cooling radiator (33), and an ambient temperature sensor (34). The first three-way valve (31) is located between the liquid storage tank (40) and the evaporator (20). The first end of the first three-way valve (31) is connected to the first interface of the liquid storage tank (40), and the second end of the first three-way valve (31) is connected to the fourth interface of the evaporator (20). The second three-way valve (32) is located at the first water pump. (35) Between the evaporator (20), the first end of the second three-way valve (32) is connected to the second end of the first water pump (35), the second end of the second three-way valve (32) is connected to the third interface of the evaporator (20), the first end of the natural cooling radiator (33) is connected to the third end of the first three-way valve (31), the second end of the natural cooling radiator (33) is connected to the third end of the second three-way valve (32), and the ambient temperature sensor (34) is installed on the natural cooling radiator (33).

7. The energy storage high-voltage DC liquid-cooled decoupled temperature control system according to claim 6, characterized in that, It also includes a cooling fan (70), which is connected to the condenser (18) and the natural cooling radiator (33), and the cooling fan (70) is used to dissipate heat from the condenser (18) and the natural cooling radiator (33).

8. The energy storage high-voltage DC liquid-cooled decoupled temperature control system according to claim 1, characterized in that, The second refrigerant circulation loop (50) includes a second water pump (52) and an electric heater (57). The first end of the second water pump (52) is connected to the fourth interface of the storage tank (40), and the second end of the second water pump (52) is used to connect to the product. The first end of the electric heater (57) is connected to the third interface of the storage tank (40), and the second end of the electric heater (57) is used to connect to the product. The refrigerant flowing out of the storage tank (40) flows sequentially through the electric heater (57), the product and the second water pump (52) before flowing into the storage tank (40).

9. The energy storage high-voltage DC liquid-cooled decoupled temperature control system according to claim 8, characterized in that, The second refrigerant circulation loop (50) also includes an automatic vent valve (51), a return liquid temperature sensor (53), a return liquid pressure sensor (54), a supply liquid temperature sensor (55), and a supply liquid pressure sensor (56). The automatic vent valve (51) is installed on the pipeline between the second water pump (52) and the storage tank (40). The return liquid temperature sensor (53) and the return liquid pressure sensor (54) are both installed on the pipeline between the second water pump (52) and the product. The supply liquid temperature sensor (55) and the supply liquid pressure sensor (56) are both installed on the pipeline between the electric heater (57) and the product.

10. The energy storage high-voltage DC liquid-cooled decoupled temperature control system according to claim 8, characterized in that, It also includes a replenishment and pressure regulation circuit (60), which includes a safety valve (61), a replenishment tank (63), a replenishment pump (64), and a check valve (65). The first end of the safety valve (61) is connected to the first end of the second water pump (52), the second end of the safety valve (61) is connected to the first end of the replenishment tank (63), the second end of the replenishment tank (63) is connected to the first end of the replenishment pump (64), the second end of the replenishment pump (64) is connected to the first end of the check valve (65), and the second end of the check valve (65) is connected to the second end of the second water pump (52).

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