CN-224232709-U - Energy storage liquid cooling system

CN224232709UCN 224232709 UCN224232709 UCN 224232709UCN-224232709-U

Abstract

The utility model discloses an energy storage liquid cooling system which comprises a heat exchanger, a first infusion part, a refrigerating module, an air cooling part, a second infusion part, a liquid outlet of the cold end of the heat exchanger, a liquid inlet of the second infusion part and a liquid inlet of the first infusion part, wherein the first infusion part is communicated with a cold end of the heat exchanger to form a first liquid cooling flow path, the refrigerating module is communicated with a cold end of the heat exchanger to form a refrigerating loop, the air cooling part is communicated with the air cooling part to form a second liquid cooling flow path, the liquid outlet of the cold end of the heat exchanger is selectively communicated with the liquid inlet of the second infusion part through a first branch, and the liquid inlet of the first infusion part is selectively communicated with the liquid outlet of the air cooling part through a second branch. When the ambient temperature is higher and the heat exchange efficiency of the air cooling component is low, the first branch and the second branch bridge the first liquid cooling flow path and the second liquid cooling flow path, and the low-temperature secondary refrigerant in the first liquid cooling flow path can be partially introduced into the second liquid cooling flow path through the first branch, so that the cooling capacity compensation of PCS is realized, the defect of cooling capacity of PCS is overcome, and normal operation of PCS is ensured.

Inventors

SHI WENBO
LIU MINXUE
YAN LONGCHAO
WEI FENG
LIU GUOQIN

Assignees

青岛海信网络能源股份有限公司

Dates

Publication Date: 20260512
Application Date: 20250403

Claims (10)

1. An energy storage liquid cooling system, comprising: a heat exchanger; The first liquid cooling flow path is used for radiating heat of the energy storage battery; the refrigeration module is communicated with the cold supply end of the heat exchanger to form a refrigeration loop; An air cooling component; A second liquid cooling flow path formed by communicating the second liquid delivery member with the air cooling member, the second liquid cooling flow path is used for radiating PCS; The liquid outlet of the cold end of the heat exchanger is selectively communicated with the liquid inlet of the second infusion part through a first branch, and the liquid inlet of the first infusion part is selectively communicated with the liquid outlet of the air cooling part through a second branch.
2. The energy storage liquid cooling system of claim 1, further comprising: The first proportional regulating valve is arranged on the first branch and is used for regulating the flow of the first branch; The second proportional regulating valve is arranged on the second branch and is used for regulating the flow of the second branch; Wherein the first proportional control valve and the second proportional control valve are configured to be adjusted synchronously.
3. The energy storage liquid cooling system of claim 1, further comprising: One end of the bypass branch is communicated with the liquid outlet of the first infusion part, and the other end of the bypass branch is communicated with the liquid outlet of the cold end of the heat exchanger; The first valve is arranged on the bypass branch and used for opening or closing the bypass branch.
4. The energy storage liquid cooling system of claim 1 wherein the refrigeration module comprises: the compression refrigeration unit comprises a compressor, a condenser and an electronic expansion valve, wherein the compressor, the condenser, the electronic expansion valve and the cooling end of the heat exchanger are sequentially communicated through pipelines to form a compression refrigeration loop.
5. The energy storage and liquid cooling system of claim 4 wherein the refrigeration module further comprises: the fluorine pump refrigeration unit comprises a liquid storage device, a fluorine pump and the electronic expansion valve, wherein the liquid storage device, the fluorine pump, the electronic expansion valve and the cooling end of the heat exchanger are sequentially communicated through pipelines.
6. The energy storage liquid cooling system of claim 5, further comprising: the first pipeline is connected in parallel with two ends of the compressor; The first check valve is arranged on the first pipeline, the input end of the first check valve is connected with the input end of the compressor, and the output end of the first check valve is connected with the output end of the compressor.
7. The energy storage liquid cooling system of claim 6, further comprising: the second pipeline is connected in parallel with the two ends of the fluorine pump and the liquid reservoir; The second one-way valve is arranged on the second pipeline, the input end of the second one-way valve is communicated with the liquid inlet of the liquid reservoir, and the output end of the second one-way valve is communicated with the liquid outlet of the fluorine pump; the first electromagnetic valve is arranged on a pipeline connected between the liquid storage device and the condenser; And the second electromagnetic valve is arranged on a pipeline connected between the liquid reservoir and the fluorine pump.
8. The energy storage liquid cooling system of claim 6, further comprising: the second pipeline is connected in parallel with two ends of the fluorine pump; The second one-way valve is arranged on the second pipeline, the input end of the second one-way valve is communicated with the liquid inlet of the fluorine pump, and the output end of the second one-way valve is communicated with the liquid outlet of the fluorine pump; the first electromagnetic valve is arranged on a pipeline connected between the liquid storage device and the condenser; the second electromagnetic valve is arranged on a pipeline connected between the liquid reservoir and the fluorine pump; And the third electromagnetic valve is arranged on pipelines connected with two ends of the first electromagnetic valve, the liquid storage device and the second electromagnetic valve in parallel.
9. The energy-storage liquid cooling system of claim 1, further comprising a temperature sensor and a pressure sensor, wherein the temperature sensor and the pressure sensor are disposed at the liquid inlet and the liquid outlet of the first liquid cooling flow path and the liquid inlet and the liquid outlet of the second liquid cooling flow path, respectively.
10. The energy storage liquid cooling system of claim 1, further comprising: An expansion tank; A first connecting pipe, one end of which is communicated with the first liquid cooling flow path, and the other end of which is communicated with the output end of the expansion tank; The second valve is arranged on the first connecting pipeline and is used for opening or closing the first connecting pipeline; one end of the second connecting pipeline is communicated with the second liquid cooling flow path, and the other end of the second connecting pipeline is communicated with the output end of the expansion tank; and the third valve is arranged on the second connecting pipeline and is used for opening or closing the second connecting pipeline.

Description

Energy storage liquid cooling system Technical Field The utility model relates to the technical field of energy storage, in particular to an energy storage liquid cooling system. Background Large-scale energy storage systems typically use containers as carriers in which are assembled battery systems, energy management systems, battery Management Systems (BMS), converter systems (PCS), cooling systems, fire protection systems, lighting and monitoring systems, and the like. With the continuous increase of the scale of energy storage machines, energy storage battery cells are developing towards large capacity, low cost and long service life. The high energy density of the high-capacity battery core brings challenges to the energy storage temperature control and heat management. The liquid cooling temperature control technology is widely applied to the container energy storage system, and the heat generated by the energy storage system is taken away through liquid circulation, so that the stability of the internal temperature of the system is maintained. At present, a PCS liquid cooling circulation system mainly utilizes an air natural cold source, and when the temperature of the external environment is high, the condition of insufficient cold quantity can occur, so that the internal temperature of the PCS is increased, and the PCS cannot normally operate. Disclosure of utility model Aiming at the problems pointed out in the background art, the utility model provides an energy storage liquid cooling system to solve the problems that in the prior art, when the temperature of the PCS liquid cooling circulation system in the external environment is high, insufficient cooling capacity can occur, so that the internal temperature of the PCS is increased, and the PCS cannot normally operate. In order to achieve the aim of the utility model, the utility model is realized by adopting the following technical scheme: The utility model provides an energy storage liquid cooling system, which comprises: a heat exchanger; The first liquid cooling flow path is used for radiating heat of the energy storage battery; the refrigeration module is communicated with the cold supply end of the heat exchanger to form a refrigeration loop; An air cooling component; A second liquid cooling flow path formed by communicating the second liquid delivery member with the air cooling member, the second liquid cooling flow path is used for radiating PCS; The liquid outlet of the cold end of the heat exchanger is selectively communicated with the liquid inlet of the second infusion part through a first branch, and the liquid inlet of the first infusion part is selectively communicated with the liquid outlet of the air cooling part through a second branch. The embodiment has the advantages that the heat exchanger, the first infusion part, the refrigerating module, the air cooling part and the second infusion part are arranged, the refrigerating module indirectly refrigerates the secondary refrigerant in the first liquid cooling flow path through heat exchange of the heat exchanger, the liquid outlet of the cold end of the heat exchanger is selectively communicated with the liquid inlet of the second infusion part through the first branch, the liquid inlet of the first infusion part is selectively communicated with the liquid outlet of the air cooling part through the second branch, when the ambient temperature is high and the heat exchange efficiency of the air cooling part is low, the first branch and the second branch bridge the first liquid cooling flow path and the second liquid cooling flow path, the low-temperature secondary refrigerant in the first liquid cooling flow path can be partially led into the second liquid cooling flow path through the first branch, so that cold compensation of PCS is realized, the condition of insufficient cold of PCS can be compensated, and normal operation of PCS is guaranteed. In some embodiments of the application, the energy storage liquid cooling system further comprises: The first proportional regulating valve is arranged on the first branch and is used for regulating the flow of the first branch; The second proportional regulating valve is arranged on the second branch and is used for regulating the flow of the second branch; Wherein the first proportional control valve and the second proportional control valve are configured to be adjusted synchronously. The embodiment has the advantages that the first proportional regulating valve is arranged on the first branch, the second proportional regulating valve is arranged on the second branch, and the first proportional regulating valve and the second proportional regulating valve can be synchronously regulated, so that the refined distribution control of the cold quantity is realized. In some embodiments of the application, the energy storage liquid cooling system further comprises: One end of the bypass branch is communicated with the liquid outlet of the fi