Energy-saving water cooling unit for energy storage

Abstract

The utility model relates to the field of new energy storage, in particular to an energy-saving water chilling unit for energy storage, which comprises a battery cluster, one end of the battery cluster is respectively connected with one end of a plate heat exchanger and a first three-way valve through an internal circulation water pump unit, and the other end of the battery cluster is respectively connected with the other end of the plate heat exchanger and a second three-way valve. Two ends of the plate heat exchanger are respectively connected with two ends of the condensation assembly, two ends of the condensation assembly are respectively connected with the first three-way valve and the second three-way valve, and the first three-way valve and the second three-way valve are respectively connected with two ends of the external circulation water pump unit. The energy-saving water chilling unit for energy storage can meet the requirements for large refrigerating power and heating power, has the advantages of being high in comprehensive energy efficiency ratio, multifunctional in matching, high in installation freedom degree and the like, can provide direct cooling capacity and heat output for heat management of a battery pack within a large-span environment temperature range, and is suitable for large-scale popularization and application. Meanwhile, the system energy efficiency ratio is greatly improved.

Description

Technical Field

[0001] The utility model relates to the field of new energy energy storage, in particular to an energy-saving water-cooled unit for energy storage. Background Art

[0002] In the field of new energy energy storage, as the power of energy storage containers gradually expands and the operating conditions requirements gradually increase, the thermal management of lithium batteries for energy storage continues to tend to the liquid cooling method, and the development of high-power output energy-saving water-cooled units for energy storage has been increasingly emphasized. To maintain the appropriate charging and discharging operating temperature range of the battery, the unit provides continuous cooling capacity and heat for the battery pack thermal management system, and at the same time, it also needs to provide corresponding refrigeration and heating power consumption. Its cooling structure can refer to the Chinese utility model patent with the application number CN202120256277.6 and the name of a thermal management unit for a containerized energy storage system. Currently, industrial and commercial energy storage users mainly focus on two major directions. One is the service life of energy storage and the corresponding number of cycles, and the other is the operating energy consumption of the energy storage system. The latter comes from the energy consumption loss of the electrical system on the one hand, and mainly comes from the energy consumption loss of the thermal management system on the other hand. Therefore, the main direction in the energy storage field in the future is to take energy-saving and production-increasing as the main development goal. For the unit, indirect cooling (air cooling or liquid cooling) cools the battery through refrigerant coolant or air, resulting in loss of refrigeration capacity, and it is difficult to improve the system energy efficiency ratio only by means of system scheme design, electrical equipment selection, etc. Summary of the Utility Model

[0003] The technical problem to be solved by the utility model is to provide an energy-saving water-cooled unit for energy storage that reduces the loss of refrigeration capacity.

[0004] To solve the above technical problem, the technical solution adopted by the utility model is: an energy-saving water-cooled unit for energy storage, including a battery cluster. One end of the battery cluster is respectively connected to one end of a plate heat exchanger and a first three-way valve through an internal circulation water pump unit, and the other end of the battery cluster is respectively connected to the other end of the plate heat exchanger and a second three-way valve. Both ends of the plate heat exchanger are respectively connected to both ends of a condensation component, both ends of the condensation component are respectively connected to the first three-way valve and the second three-way valve, and the first three-way valve and the second three-way valve are respectively connected to both ends of an external circulation water pump unit.

[0005] Further, the internal circulation water pump unit includes an internal circulation water pump and a heater. One end of the battery cluster is sequentially connected to the heater and the internal circulation water pump and then respectively connected to one end of the plate heat exchanger and the first three-way valve.

[0006] Further, the internal circulation water pump and the heater are arranged in sequence along the flow direction of the coolant.

[0007] Further, the condensation assembly includes a condenser and a compressor. The condenser is provided with a condensation fan. One end of the plate heat exchanger is connected to one end of the condenser through the compressor, and the other end of the plate heat exchanger is connected to the other end of the condenser.

[0008] Further, the other end of the plate heat exchanger is connected to the other end of the condenser through an expansion valve.

[0009] Further, the external circulation water pump unit includes an external circulation water pump and a heat exchanger. The two ends after the series connection of the external circulation water pump and the heat exchanger are respectively connected to the first three-way valve and the second three-way valve.

[0010] Further, the heat exchanger and the external circulation water pump are arranged in sequence along the flow direction of the coolant.

[0011] Further, a filter is provided between the internal circulation water pump unit and the plate heat exchanger.

[0012] Further, an expansion tank is connected to the other end of the battery cluster.

[0013] Further, one ends of two or more battery clusters in parallel are respectively connected to one end of the plate heat exchanger and the first three-way valve, and the other ends of two or more battery clusters in parallel are respectively connected to the other end of the plate heat exchanger and the second three-way valve.

[0014] The beneficial effects of the present utility model are as follows: An energy-saving water-cooled unit for energy storage. When the first three-way valve and the second three-way valve are in the first position, the external circulation water pump unit works, exchanges heat with the condensation assembly, and refrigerates for a conventional fluorine system. The condensation fan can directly release the heat of the battery cluster into the atmospheric environment. When the first three-way valve and the second three-way valve are in the second position, the condensation assembly does not work, and the external circulation water pump unit and the internal circulation water pump unit form a cooling circuit for the battery cluster system. The energy-saving water-cooled unit for energy storage provided by the present utility model can meet the requirements of relatively large refrigeration power and heating power. It belongs to a relatively large unit type in the energy storage industry and has advantages such as a high comprehensive energy efficiency ratio, multi-functional matching, and high installation freedom. It can provide direct cold and heat output for the thermal management of battery packs within a relatively large ambient temperature range, and at the same time greatly improve the energy efficiency ratio of the system. At the same time, the internal circulation water pump can be independently controlled or controlled simultaneously, that is, it can cool a single battery cluster alone or cool all battery clusters simultaneously. Therefore, it can be applied to both the string-type pcs scheme and the integrated pcs scheme at the same time. Description of the Drawings

[0015] Figure 1 It is a structural schematic diagram of the energy-saving water-cooled unit for energy storage;

[0016] Label Description:

[0017] 1. Battery cluster; 11. Expansion tank; 2. Inner circulation water pump unit; 21. Inner circulation water pump; 22. Heater; 3. Plate heat exchanger; 31. Expansion valve; 32. Filter; 4. First three-way valve; 5. Second three-way valve; 6. Condensation component; 61. Condenser; 611. Condensation fan; 62. Compressor; 7. Outer circulation water pump unit; 71. Outer circulation water pump; 72. Heat exchanger. Detailed implementation mode

[0018] To describe the technical content, achieved purpose and effects of the present utility model in detail, the following is described in conjunction with the implementation modes and with reference to the drawings.

[0019] The present utility model provides an energy-saving water-cooled unit for energy storage. Aiming at the problem that it is difficult to improve the energy efficiency ratio of the indirect cooling system, a secondary fluorine system cooling scheme unit is provided, which not only effectively reduces the system energy consumption, but can also be applied to the string type pcs scheme or the integrated pcs scheme at the same time.

[0020] Please refer to Figure 1 As shown in the figure, an energy-saving water-cooled unit for energy storage of the present utility model includes a battery cluster 1. One end of the battery cluster 1 is respectively connected to one end of a plate heat exchanger 3 and a first three-way valve 4 through an inner circulation water pump unit 2. The other end of the battery cluster 1 is respectively connected to the other end of the plate heat exchanger 3 and a second three-way valve 5. Both ends of the plate heat exchanger 3 are respectively connected to both ends of a condensation component 6. Both ends of the condensation component 6 are respectively connected to the first three-way valve 4 and the second three-way valve 5. The first three-way valve 4 and the second three-way valve 5 are respectively connected to both ends of an outer circulation water pump unit 7.

[0021] It can be seen from the above description that the beneficial effect of the present utility model is as follows: an energy-saving water-cooled unit for energy storage. When the first three-way valve 4 and the second three-way valve 5 are in the first position, the outer circulation water pump unit 7 works and exchanges heat with the condensation component 6 for conventional fluorine system refrigeration, and the condensation fan 611 can directly release the heat of the battery cluster 1 into the atmospheric environment. When the first three-way valve 4 and the second three-way valve 5 are in the second position, the condensation component 6 does not work, and the outer circulation water pump unit 7 and the inner circulation water pump unit 2 form a cooling circuit for the battery cluster 1 system. The energy-saving water-cooled unit for energy storage provided by the present utility model can meet the requirements of larger refrigeration power and heating power. It belongs to a relatively large unit type in the energy storage industry and has advantages such as high comprehensive energy efficiency ratio, multi-functional matching, and high installation freedom. It can provide direct cooling and heat output for the battery pack thermal management within a relatively large ambient temperature range, and at the same time greatly improve the system energy efficiency ratio. At the same time, the inner circulation water pump 21 can be independently controlled or controlled simultaneously, that is, it can cool a single battery cluster alone or cool all battery clusters simultaneously. Therefore, it can be applied to the string type pcs scheme or the integrated pcs scheme at the same time.

[0022] In an alternative embodiment, the internal circulation water pump unit 2 includes an internal circulation water pump 21 and a heater 22. One end of the battery cluster 1 is sequentially connected to the heater 22 and the internal circulation water pump 21, and then is respectively connected to one end of the plate heat exchanger 3 and the first three-way valve 4.

[0023] In an alternative embodiment, the internal circulation water pump 21 and the heater 22 are arranged in sequence along the coolant flow direction.

[0024] In an alternative embodiment, the condensation assembly 6 includes a condenser 61 and a compressor 62. The condenser 61 is provided with a condensation fan 611. One end of the plate heat exchanger 3 is connected to one end of the condenser 61 through the compressor 62, and the other end of the plate heat exchanger 3 is connected to the other end of the condenser 61.

[0025] In an alternative embodiment, the other end of the plate heat exchanger 3 is connected to the other end of the condenser 61 through an expansion valve 31.

[0026] In an alternative embodiment, the external circulation water pump unit 7 includes an external circulation water pump 71 and a heat exchanger 72. The two ends after the series connection of the external circulation water pump 71 and the heat exchanger 72 are respectively connected to the first three-way valve 4 and the second three-way valve 5.

[0027] In an alternative embodiment, the heat exchanger 72 and the external circulation water pump 71 are arranged in sequence along the coolant flow direction.

[0028] In an alternative embodiment, a filter 32 is provided between the internal circulation water pump unit 2 and the plate heat exchanger 3.

[0029] In an alternative embodiment, an expansion tank 11 is connected to the other end of the battery cluster 1.

[0030] In an alternative embodiment, one ends of two or more battery clusters 1 in parallel are respectively connected to one end of the plate heat exchanger 3 and the first three-way valve 4, and the other ends of two or more battery clusters 1 in parallel are respectively connected to the other end of the plate heat exchanger 3 and the second three-way valve 5.

[0031] As can be seen from the above description, the water pumps can be individually controlled to cool their respective battery clusters, and can be applied to both the string-type pcs scheme and the integrated pcs scheme simultaneously.

[0032] Please refer to Figure 1 As shown, Embodiment 1 of the present utility model is: an energy-saving water-cooled unit for energy storage, including a battery cluster 1. One end of the battery cluster 1 is respectively connected to one end of the plate heat exchanger 3 and the first three-way valve 4 through the internal circulation water pump unit 2, and the other end of the battery cluster 1 is respectively connected to the other end of the plate heat exchanger 3 and the second three-way valve 5. The two ends of the plate heat exchanger 3 are respectively connected to the two ends of the condensation assembly 6, the two ends of the condensation assembly 6 are respectively connected to the first three-way valve 4 and the second three-way valve 5, and the first three-way valve 4 and the second three-way valve 5 are respectively connected to the two ends of the external circulation water pump unit 7.

[0033] The internal circulation water pump unit 2 includes an internal circulation water pump 21 and a heater 22. One end of the battery cluster 1 is successively connected to the heater 22 and the internal circulation water pump 21 and then respectively connected to one end of the plate heat exchanger 3 and the first three-way valve 4. The internal circulation water pump 21 and the heater 22 are arranged in sequence along the coolant flow direction. The condensation assembly 6 includes a condenser 61 and a compressor 62. The condenser 61 is provided with a condensation fan 611. One end of the plate heat exchanger 3 is connected to one end of the condenser 61 through the compressor 62, and the other end of the plate heat exchanger 3 is connected to the other end of the condenser 61. The other end of the plate heat exchanger 3 is connected to the other end of the condenser 61 through an expansion valve 31. The external circulation water pump unit 7 includes an external circulation water pump 71 and a heat exchanger 72. Both ends after the external circulation water pump 71 and the heat exchanger 72 are connected in series are respectively connected to the first three-way valve 4 and the second three-way valve 5. The heat exchanger 72 and the external circulation water pump 71 are arranged in sequence along the coolant flow direction. A filter 32 is provided between the internal circulation water pump unit 2 and the plate heat exchanger 3. The other end of the battery cluster 1 is connected with an expansion tank 11. One ends of two or more parallel-connected battery clusters 1 are respectively connected to one end of the plate heat exchanger 3 and the first three-way valve 4, and the other ends of two or more parallel-connected battery clusters 1 are respectively connected to the other end of the plate heat exchanger 3 and the second three-way valve 5.

[0034] In summary, for the energy-saving water-cooled unit for energy storage of the present utility model, when the first three-way valve and the second three-way valve are in the first position, the external circulation water pump unit works, exchanges heat with the condensation assembly, refrigerates for a conventional fluorine system, and the condensation fan can directly release the heat of the battery cluster to the atmospheric environment. When the first three-way valve and the second three-way valve are in the second position, the condensation assembly does not work, and the external circulation water pump unit and the internal circulation water pump unit form a cooling circuit for the battery cluster system. The energy-saving water-cooled unit for energy storage provided by the present utility model can meet the requirements of relatively large refrigeration power and heating power, belongs to a relatively large unit type in the energy storage industry, has advantages such as a high comprehensive energy efficiency ratio, multi-functional matching, and high installation freedom, can provide direct cooling capacity and heat output for the thermal management of the battery pack within a relatively large ambient temperature range, greatly improves the system energy efficiency ratio at the same time, and the internal circulation water pump can be independently controlled or controlled simultaneously, that is, it can cool a certain battery cluster alone or cool all battery clusters simultaneously, so it can be applied to the string-type pcs scheme or the integrated pcs scheme at the same time.

[0035] The above are only the embodiments of the present utility model, and do not limit the patent scope of the present utility model accordingly. All equivalent transformations made by using the content of the specification and drawings of the present utility model, or directly or indirectly applied in the relevant technical fields, are equally included in the patent protection scope of the present utility model.

Claims

1. An energy-saving water-cooled unit for energy storage, characterized in that, It includes a battery cluster. One end of the battery cluster is respectively connected to one end of a plate heat exchanger and a first three-way valve through an internal circulation water pump unit. The other end of the battery cluster is respectively connected to the other end of the plate heat exchanger and a second three-way valve. The two ends of the plate heat exchanger are respectively connected to the two ends of a condensation assembly. The two ends of the condensation assembly are respectively connected to the first three-way valve and the second three-way valve. The first three-way valve and the second three-way valve are respectively connected to the two ends of an external circulation water pump unit.

2. The energy-saving water-cooled unit for energy storage according to claim 1, wherein, The internal circulation water pump unit includes an internal circulation water pump and a heater. One end of the battery cluster is connected to one end of the plate heat exchanger and the first three-way valve respectively after sequentially connecting the heater and the internal circulation water pump.

3. The energy-saving water-cooled unit for energy storage according to claim 2, wherein, The internal circulation water pump and the heater are arranged in sequence along the coolant flow direction.

4. The energy-saving water-cooled unit for energy storage according to claim 1, characterized in that, The condensation assembly includes a condenser and a compressor. The condenser is provided with a condensation fan. One end of the plate heat exchanger is connected to one end of the condenser through the compressor. The other end of the plate heat exchanger is connected to the other end of the condenser.

5. The energy-saving water-cooled unit for energy storage according to claim 4, characterized in that, The other end of the plate heat exchanger is connected to the other end of the condenser through an expansion valve.

6. The energy-saving water-cooled unit for energy storage according to claim 1, characterized in that The external circulation water pump unit includes an external circulation water pump and a heat exchanger. The two ends after the external circulation water pump and the heat exchanger are connected in series are respectively connected to the first three-way valve and the second three-way valve.

7. The energy-saving water-cooled unit for energy storage according to claim 6, wherein, The heat exchanger and the external circulation water pump are arranged in sequence along the coolant flow direction.

8. The energy-saving water-cooled unit for energy storage according to claim 1, wherein, A filter is provided between the internal circulation water pump unit and the plate heat exchanger.

9. The energy-saving water-cooled unit for energy storage according to claim 1, wherein An expansion tank is connected to the other end of the battery cluster.

10. The energy-saving water-cooled unit for energy storage according to claim 1, wherein, One ends of two or more battery clusters connected in parallel are respectively connected to one end of the plate heat exchanger and the first three-way valve. The other ends of two or more battery clusters connected in parallel are respectively connected to the other end of the plate heat exchanger and the second three-way valve.

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