Energy storage heat management system and energy storage heat exchange unit

Abstract

The utility model discloses an energy storage heat management system and an energy storage heat exchange unit. The energy storage heat management system comprises a plate heat exchanger, a first inverter compressor, a first condenser assembly, a first drying filter and a first electronic expansion valve which are sequentially connected through fluorine pipes to form a first refrigeration circulation loop; the plate heat exchanger, a second inverter compressor, a second condenser assembly, a second dry filter and a second electronic expansion valve are sequentially connected through fluorine pipes to form a second refrigeration circulation loop; the water return pipe, the water tank, the pressure container, the circulating water pump, the plate heat exchanger, the PTC heater and the water outlet pipe are sequentially connected through water pipes to form a water circulation loop. The energy storage heat management system further comprises an electric control box, and the electric control box controls the first refrigeration circulation loop, the second refrigeration circulation loop and the water circulation loop to work. According to the utility model, the two variable-frequency compressors are adopted to respectively realize two refrigeration circulation loops, so that the refrigeration capacity range and the refrigeration range of the system are enlarged, and the cooling speed of the system is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of energy storage devices, and in particular to an energy storage thermal management system and an energy storage heat exchange unit. Background Art

[0002] Energy storage containers utilize advanced energy storage technology to store electrical energy and release it when needed, providing stable power support for various energy systems. Battery swap stations are centralized charging stations that centrally store, charge, and distribute a large number of batteries.

[0003] For large energy storage containers or large battery swap stations with a storage capacity greater than 5GKW / h, due to the large number of battery cluster assemblies and the uneven usage of battery packs, the heat source generated by battery charging and discharging has a wide range, and the optimal temperature difference between battery charging and discharging is between ±1°C. Therefore, refrigeration equipment with a large cooling capacity range, fast cooling speed and small temperature difference range is required. Utility Model Content

[0004] The utility model provides an energy storage thermal management system and an energy storage heat exchange unit, which have the characteristics of a large refrigeration capacity range, a fast cooling speed and a small temperature difference range.

[0005] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0006] In a first aspect, the utility model provides an energy storage thermal management system, comprising a plate heat exchanger, a first variable frequency compressor, a first condenser assembly, a first filter drier, a first electronic expansion valve, a second variable frequency compressor, a second condenser assembly, a second filter drier, a second electronic expansion valve, a return pipe, a water tank, a pressure vessel, a circulating water pump, a PTC heater, and a water outlet pipe;

[0007] The plate heat exchanger, the first variable frequency compressor, the first condenser assembly, the first drying filter and the first electronic expansion valve are sequentially connected through fluorine pipes to form a first refrigeration cycle;

[0008] The plate heat exchanger, the second variable frequency compressor, the second condenser assembly, the second drying filter and the second electronic expansion valve are sequentially connected through fluorine pipes to form a second refrigeration cycle;

[0009] The return pipe, the water tank, the pressure vessel, the circulating water pump, the plate heat exchanger, the PTC heater and the outlet pipe are sequentially connected through water pipes to form a water circulation loop;

[0010] The energy storage thermal management system further includes an electrical control box, which is used to control the operation of the first refrigeration cycle loop, the second refrigeration cycle loop, and the water cycle loop;

[0011] Fans are provided on the air outlet sides of the first condenser assembly and the second condenser assembly.

[0012] In one possible implementation, a refrigerant filling port, a refrigerant pressure sensor, and a refrigerant temperature sensor are provided on the fluorine pipe between the plate heat exchanger and the first variable-frequency compressor, the fluorine pipe between the first variable-frequency compressor and the first condenser assembly, the fluorine pipe between the plate heat exchanger and the second variable-frequency compressor, and the fluorine pipe between the second variable-frequency compressor and the second condenser assembly;

[0013] The refrigerant pressure sensor and the refrigerant temperature sensor are both electrically connected to the electric control box.

[0014] In a possible implementation, an ambient temperature sensor is further included;

[0015] The ambient temperature sensor is electrically connected to the electric control box and is used to collect the external ambient temperature.

[0016] In a possible implementation, the return pipe and the outlet pipe are both provided with a water pipe pressure sensor and a water pipe temperature sensor;

[0017] The water pipe pressure sensor and the water pipe temperature sensor are both electrically connected to the electric control box.

[0018] In a possible implementation, a filter is provided on the water pipe between the water tank and the water pipe pressure sensor of the return pipe.

[0019] In a possible implementation, a liquid level sensor is provided in the water tank, and the liquid level sensor is electrically connected to the electrical control box.

[0020] In a possible implementation, a water supply pipe is further provided on the water pipe between the filter and the water pipe pressure sensor of the return pipe;

[0021] The water supply pipe is sequentially provided with a one-way valve and a water supply pump for supplying water toward the water tank.

[0022] In a second aspect, the present invention provides an energy storage heat exchange unit, comprising a box and any one of the above energy storage thermal management systems;

[0023] The first refrigeration cycle loop, the second refrigeration cycle loop, the water cycle loop and the electrical control box of the energy storage thermal management system are all arranged in the box body. The fan of the energy storage thermal management system is embedded in the surface of the box body, and the surface of the box body is provided with heat dissipation holes.

[0024] In a possible implementation, the electric control box divides the box body into an upper area and a lower area;

[0025] The first condenser assembly, the second condenser assembly, the first variable frequency compressor, the second variable frequency compressor, the first filter drier, and the second filter drier of the energy storage thermal management system are all arranged in the upper area; the first condenser assembly, the second condenser assembly, the first filter drier, and the second filter drier are integrated to form a condensation plate, and the first variable frequency compressor and the second variable frequency compressor are located on the air inlet side of the condensation plate;

[0026] The lower area is vertically divided into a first area and a second area; the plate heat exchanger, the first electronic expansion valve and the second electronic expansion valve of the energy storage thermal management system are all arranged in the first area; the pressure vessel, the water tank and the circulating water pump of the energy storage thermal management system are arranged in the second area from top to bottom, the PTC heater of the energy storage thermal management system is vertically arranged on one side of the water tank, and the return pipe and the outlet pipe of the energy storage thermal management system pass through the same side of the box.

[0027] In a possible implementation, a forklift socket is provided at the bottom of the box.

[0028] The energy storage thermal management system provided by the embodiment of the present utility model adopts two variable frequency compressors to realize two refrigeration cycle loops respectively, thereby increasing the refrigeration capacity range and refrigeration range of the system, improving the refrigeration speed and cooling rate of the system, and increasing the refrigeration range of the system.

[0029] Cooling operation is provided through two refrigeration cycle loops, and heating operation is achieved through the PTC heater, thereby maintaining the release temperature of the heat source at the battery end and providing the optimal operating temperature for the battery cluster or battery pack, that is, making the battery cluster or battery pack operate within a smaller temperature difference range.

[0030] Compared with ordinary compressors, the use of variable frequency compressors can provide smaller cooling requirements, maintain low-power operation for a long time, reduce power consumption, and thus reduce subsequent electricity bills and operating costs.

[0031] The two refrigeration systems and variable frequency compressor can give the energy storage thermal management system an ultra-long refrigeration range, making it easier to maintain a stable temperature difference. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] Figure 1 A schematic diagram of the system structure of an energy storage thermal management system provided by an embodiment of the utility model;

[0033] Figure 2 A schematic diagram of the overall structure of an energy storage heat exchange unit provided in an embodiment of the present utility model;

[0034] Figure 3 A schematic diagram of the internal structure of an energy storage heat exchange unit provided in an embodiment of the present utility model.

[0035] Reference numerals and description of the drawings:

[0036] 1. Plate heat exchanger; 2. First variable frequency compressor; 3. First condenser assembly; 4. First drier filter; 5. First electronic expansion valve; 6. Second variable frequency compressor; 7. Second condenser assembly; 8. Second drier filter; 9. Second electronic expansion valve; 10. Return pipe; 11. Water tank; 12. Pressure vessel; 13. Circulating water pump; 14. PTC heater; 15. Outlet pipe; 16. Electrical control box; 17. Fan; 18. Refrigerant filling port; 19. Refrigerant pressure sensor; 20. Refrigerant temperature sensor; 21. Ambient temperature sensor; 22. Water pipe pressure sensor; 23. Water pipe temperature sensor; 24. Filter; 25. Liquid level sensor; 26. Water supply pipe; 27. One-way valve; 28. Water supply pump; 29. ​​Box; 30. Heat dissipation hole; 31. Forklift socket; 32. Condenser plate. DETAILED DESCRIPTION

[0037] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0038] In the following, the terms "first" and "second" are used for descriptive purposes only and are not to be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Thus, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the embodiments of the present disclosure, unless otherwise specified, "multiple" means two or more. In addition, the use of "based on" or "according to" means openness and inclusiveness, because the process, steps, calculations or other actions "based on" or "according to" one or more of the conditions or values ​​may be based on additional conditions or values ​​beyond the stated in practice.

[0039] The embodiments of the present utility model provide an energy storage thermal management system and an energy storage heat exchange unit, which have the characteristics of a large cooling capacity range, a fast cooling speed and a small temperature difference range.

[0040] like Figure 1As shown, in the first aspect, an embodiment of the present invention provides an energy storage thermal management system, which includes a plate heat exchanger 1, a first variable frequency compressor 2, a first condenser assembly 3, a first drying filter 4, a first electronic expansion valve 5, a second variable frequency compressor 6, a second condenser assembly 7, a second drying filter 8, a second electronic expansion valve 9, a return pipe 10, a water tank 11, a pressure vessel 12, a circulating water pump 13, a PTC heater 14 and a water outlet pipe 15.

[0041] The plate heat exchanger 1 , the first variable frequency compressor 2 , the first condenser assembly 3 , the first filter drier 4 and the first electronic expansion valve 5 are sequentially connected via fluorine tubes to form a first refrigeration cycle.

[0042] The plate heat exchanger 1 , the second variable frequency compressor 6 , the second condenser assembly 7 , the second drying filter 8 and the second electronic expansion valve 9 are sequentially connected via fluorine pipes to form a second refrigeration cycle.

[0043] The return pipe 10 , the water tank 11 , the pressure vessel 12 , the circulating water pump 13 , the plate heat exchanger 1 , the PTC heater 14 and the water outlet pipe 15 are sequentially connected through water pipes to form a water circulation loop.

[0044] The energy storage thermal management system further includes an electric control box 16 , and the electronic components in the first refrigeration cycle loop, the second refrigeration cycle loop, and the water cycle loop are all connected to the electric control box 16 via a wiring harness.

[0045] The electrical control box 16 is used to control the operation of the first refrigeration cycle circuit, the second refrigeration cycle circuit, and the water cycle circuit.

[0046] Specifically, the electrical control box 16 provides power to each electronic component, and data from each electronic component is input or output to the controller within the electrical control box 16. The controller within the electrical control box 16 also sends corresponding control signals to each electronic unit to control the operating status of the corresponding electronic unit. The power supply includes high-voltage and low-voltage power supplies, thereby controlling the operation of the first refrigeration cycle, the second refrigeration cycle, and the water circulation circuit.

[0047] Fans 17 are provided on the air outlet sides of the first condenser assembly 3 and the second condenser assembly 7 .

[0048] Furthermore, a refrigerant filling port 18, a refrigerant pressure sensor 19, and a refrigerant temperature sensor 20 are provided on the fluorine pipe between the plate heat exchanger 1 and the first variable frequency compressor 2, the fluorine pipe between the first variable frequency compressor 2 and the first condenser assembly 3, the fluorine pipe between the plate heat exchanger 1 and the second variable frequency compressor 6, and the fluorine pipe between the second variable frequency compressor 6 and the second condenser assembly 7;

[0049] The refrigerant pressure sensor 19 and the refrigerant temperature sensor 20 are both electrically connected to the electrical control box 16 .

[0050] Specifically, taking the first refrigeration cycle as an example, the end where the plate heat exchanger 1 is connected to the first variable frequency compressor 2 is the low-pressure side, and the end where the first variable frequency compressor 2 is connected to the first condenser assembly 3 is the high-pressure side.

[0051] There are two refrigerant filling ports 18, one on the high-pressure side and the other on the low-pressure side. The high-pressure side refrigerant filling port 18 is mainly used to check and adjust the working state of the compressor, and the low-pressure side refrigerant filling port 18 is used to add refrigerant.

[0052] There are two refrigerant pressure sensors 19, which are respectively arranged on the high-pressure side and the low-pressure side, for monitoring the pressure in the first refrigeration cycle.

[0053] There are two refrigerant temperature sensors 20, which are respectively arranged on the high-pressure side and the low-pressure side, for monitoring the temperature in the first refrigeration cycle.

[0054] The second refrigeration cycle is the same as the first refrigeration cycle.

[0055] Furthermore, the energy storage thermal management system further includes an ambient temperature sensor 21 , which is electrically connected to the electrical control box 16 and is used to collect the external ambient temperature.

[0056] Specifically, the electric control box 16 controls the first refrigeration cycle circuit and the second refrigeration cycle circuit to work independently or in coordination, or adjusts the operating frequencies of the first variable frequency compressor and the second variable frequency compressor according to changes in the external ambient temperature.

[0057] Furthermore, a water pipe pressure sensor 22 and a water pipe temperature sensor 23 are provided on the return pipe 10 and the water outlet pipe 15 , and the water pipe pressure sensor 22 and the water pipe temperature sensor 23 are both electrically connected to the electric control box 16 .

[0058] Specifically, the water temperature at the inlet of the water circulation loop is monitored by the water pipe temperature sensor 23 provided on the return pipe 10 , and the water temperature at the outlet of the water circulation loop is monitored by the water pipe temperature sensor 23 provided on the outlet pipe 15 .

[0059] The pressure at the inlet end of the water circulation loop is monitored by a water pipeline pressure sensor 22 provided on the return pipe 10 , and the pressure at the outlet end of the water circulation loop is monitored by a water pipeline pressure sensor 22 provided on the outlet pipe 15 .

[0060] Furthermore, a filter 24 is provided on the water pipe between the water tank 11 and the water pipe pressure sensor 22 of the return pipe 10 .

[0061] Specifically, solid impurities contained in the passing water are removed by the filter 24, thereby extending the service life of the subsequently connected circulating water pump 13, plate heat exchanger 1 and other equipment. In this embodiment, the filter 24 is a Y-type filter.

[0062] Furthermore, a liquid level sensor 25 is provided in the water tank 11 . The liquid level sensor 25 is electrically connected to the electrical control box 16 and is used to monitor the water level in the water tank 11 .

[0063] A water inlet may also be provided on the top of the water tank 11 , and when the water level in the water tank 11 is low, water is added to the water tank 11 through the water inlet.

[0064] Furthermore, a water supply pipe 26 is provided on the water pipe between the filter 24 and the water pipe pressure sensor 22 of the return pipe 10;

[0065] The water supply pipe 26 is provided with a one-way valve 27 and a water supply pump 28 in sequence for supplying water to the water tank 11 .

[0066] Specifically, water is supplied to the water circulation loop through the water supply pipe 26 .

[0067] The energy storage thermal management system provided by the embodiment of the present utility model adopts two variable frequency compressors to realize two refrigeration cycle loops respectively, thereby increasing the refrigeration capacity and refrigeration range of the system, improving the refrigeration speed and cooling rate of the system, and increasing the refrigeration range of the system; it not only solves the problem of a large refrigeration range required due to different usage and heat release of battery clusters and battery packs, but also solves the problem of high refrigeration efficiency and fast cooling speed required for battery clusters and battery packs.

[0068] Cooling operation is provided by two refrigeration cycle loops, and heating operation is achieved through the PTC heater 14, thereby maintaining the release temperature of the heat source at the battery end and providing the optimal operating temperature for the battery cluster or battery pack, that is, allowing the battery cluster or battery pack to operate within a smaller temperature difference range (±1°C).

[0069] Compared with ordinary compressors, the use of variable frequency compressors can provide smaller cooling requirements, maintain low-power operation for a long time, reduce power consumption, and thus reduce subsequent electricity bills and operating costs.

[0070] The two refrigeration systems and variable frequency compressor can give the energy storage thermal management system an ultra-long refrigeration range, making it easier to maintain a stable temperature difference.

[0071] like Figures 1 to 3 As shown, in the second aspect, an embodiment of the present utility model provides an energy storage heat exchange unit, including a box body 29 and any one of the energy storage thermal management systems described above.

[0072] The first refrigeration cycle loop, the second refrigeration cycle loop, the water cycle loop and the electric control box 16 of the energy storage thermal management system are all arranged in the box body 29 .

[0073] The fan 17 of the energy storage thermal management system is embedded in the surface of the box 29 , and the surface of the box 29 is provided with heat dissipation holes 30 .

[0074] Furthermore, the electrical control box 16 divides the box body 29 into an upper area and a lower area.

[0075] In this embodiment, the box body 29 is a vertical cabinet, and the electric control box 16 is a long strip box body 29. The electric control box 16 is fixed inside the box body 29 parallel to the top wall of the box body 29, dividing the box body 29 into an upper area and a lower area.

[0076] The first condenser assembly 3, the second condenser assembly 7, the first variable frequency compressor 2, the second variable frequency compressor 6, the first drying filter 4 and the second drying filter 8 of the energy storage thermal management system are all arranged in the upper area.

[0077] Specifically, the first condenser assembly 3 , the second condenser assembly 7 , the first drying filter 4 and the second drying filter 8 are integrated to form a condensation plate 32 , and the first variable frequency compressor 2 and the second variable frequency compressor 6 are located on the air inlet side of the condensation plate 32 .

[0078] In this embodiment, the first condenser assembly 3 and the second condenser assembly 7 are spliced ​​up and down.

[0079] The lower area is vertically divided into a first area and a second area.

[0080] The plate heat exchanger 1 , the first electronic expansion valve 5 and the second electronic expansion valve 9 of the energy storage thermal management system are all arranged in the first area.

[0081] The pressure vessel 12, water tank 11 and circulating water pump 13 of the energy storage thermal management system are arranged in the second area from top to bottom, and the PTC heater 14 of the energy storage thermal management system is vertically arranged on one side of the water tank 11. The return pipe 10 and the outlet pipe 15 of the energy storage thermal management system pass through the same side of the box body 29.

[0082] Furthermore, in order to facilitate the movement of the energy storage heat exchange unit, a forklift socket 31 is provided at the bottom of the box body 29.

[0083] The energy storage heat exchange unit of the utility model is used in the application field of large energy storage cabinets or battery thermal management systems of battery swap stations, and is used to transfer the heat source at the battery end to the outside air through cooling water.

[0084] Compared with traditional large-scale energy storage and heat exchange units, the energy storage and heat exchange unit of the present invention is smaller in size, lighter in weight, simpler to control, lower in cost, generates higher economic benefits, and is more suitable for large-scale promotion.

[0085] The above description is merely a specific embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any changes or substitutions within the technical scope disclosed in the present invention shall be covered by the scope of protection of the present invention. Therefore, the scope of protection of the present invention shall be based on the scope of protection of the claims.

Claims

1. An energy storage thermal management system, characterized in that: It includes a plate heat exchanger, a first variable frequency compressor, a first condenser assembly, a first drying filter, a first electronic expansion valve, a second variable frequency compressor, a second condenser assembly, a second drying filter, a second electronic expansion valve, a return pipe, a water tank, a pressure vessel, a circulating water pump, a PTC heater, and a water outlet pipe; The plate heat exchanger, the first variable frequency compressor, the first condenser assembly, the first drying filter and the first electronic expansion valve are sequentially connected through fluorine pipes to form a first refrigeration cycle; The plate heat exchanger, the second variable frequency compressor, the second condenser assembly, the second drying filter and the second electronic expansion valve are sequentially connected through fluorine pipes to form a second refrigeration cycle; The return pipe, the water tank, the pressure vessel, the circulating water pump, the plate heat exchanger, the PTC heater and the outlet pipe are sequentially connected through water pipes to form a water circulation loop; The energy storage thermal management system further includes an electrical control box, which is used to control the operation of the first refrigeration cycle loop, the second refrigeration cycle loop, and the water cycle loop; Fans are provided on the air outlet sides of the first condenser assembly and the second condenser assembly.

2. The energy storage thermal management system according to claim 1, characterized in that: A refrigerant filling port, a refrigerant pressure sensor, and a refrigerant temperature sensor are provided on the fluorine pipe between the plate heat exchanger and the first variable frequency compressor, on the fluorine pipe between the first variable frequency compressor and the first condenser assembly, on the fluorine pipe between the plate heat exchanger and the second variable frequency compressor, and on the fluorine pipe between the second variable frequency compressor and the second condenser assembly; The refrigerant pressure sensor and the refrigerant temperature sensor are both electrically connected to the electric control box.

3. The energy storage thermal management system according to claim 2, characterized in that: Also included is an ambient temperature sensor; The ambient temperature sensor is electrically connected to the electric control box and is used to collect the external ambient temperature.

4. The energy storage thermal management system according to claim 1, characterized in that: The return pipe and the outlet pipe are both provided with a water pipe pressure sensor and a water pipe temperature sensor; The water pipe pressure sensor and the water pipe temperature sensor are both electrically connected to the electric control box.

5. The energy storage thermal management system according to claim 4, characterized in that: A filter is provided on the water pipe between the water tank and the water pipe pressure sensor of the return pipe.

6. The energy storage thermal management system according to claim 5, characterized in that: A liquid level sensor is provided in the water tank, and the liquid level sensor is electrically connected to the electric control box.

7. The energy storage thermal management system according to claim 6, characterized in that: A water supply pipe is also provided on the water pipe between the filter and the water pipe pressure sensor of the return pipe; The water supply pipe is sequentially provided with a one-way valve and a water supply pump for supplying water toward the water tank.

8. An energy storage heat exchange unit, characterized in that: It comprises a box and the energy storage thermal management system according to any one of claims 1 to 7; The first refrigeration cycle loop, the second refrigeration cycle loop, the water cycle loop and the electrical control box of the energy storage thermal management system are all arranged in the box body. The fan of the energy storage thermal management system is embedded in the surface of the box body, and the surface of the box body is provided with heat dissipation holes.

9. The energy storage and heat exchange unit according to claim 8, characterized in that: The electric control box divides the box body into an upper area and a lower area; The first condenser assembly, the second condenser assembly, the first variable frequency compressor, the second variable frequency compressor, the first filter drier, and the second filter drier of the energy storage thermal management system are all arranged in the upper area; the first condenser assembly, the second condenser assembly, the first filter drier, and the second filter drier are integrated to form a condensation plate, and the first variable frequency compressor and the second variable frequency compressor are located on the air inlet side of the condensation plate; The lower area is vertically divided into a first area and a second area; the plate heat exchanger, the first electronic expansion valve and the second electronic expansion valve of the energy storage thermal management system are all arranged in the first area; the pressure vessel, the water tank and the circulating water pump of the energy storage thermal management system are arranged in the second area from top to bottom, the PTC heater of the energy storage thermal management system is vertically arranged on one side of the water tank, and the return pipe and the outlet pipe of the energy storage thermal management system pass through the same side of the box.

10. The energy storage heat exchange unit according to claim 9, characterized in that: A forklift socket is provided at the bottom of the box.

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