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Lithium ion battery liquid cooling system and energy storage system

A lithium-ion battery and liquid cooling technology, which is applied to secondary batteries, circuits, electrical components, etc., can solve the problems of affecting the life of the battery module and increasing the longitudinal temperature difference of the battery, so as to improve long-term insulation, reduce the longitudinal temperature difference, and prevent The effect of being penetrated

Pending Publication Date: 2021-11-16
CHINA ELECTRIC POWER RES INST +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to provide a lithium-ion battery liquid cooling system and energy storage system to solve the technical problem that the battery longitudinal temperature difference in the existing liquid cooling scheme becomes large and affects the life of the battery module

Method used

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  • Lithium ion battery liquid cooling system and energy storage system

Examples

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Comparison scheme
Effect test

Embodiment 1

[0030] see figure 1 As shown, this embodiment provides a lithium ion battery liquid cooling system, including a liquid cooling plate 3; the liquid cooling plate 3 is provided with a number of fins 2 perpendicular to the surface of the liquid cooling plate 3; between adjacent fins 2 An installation space for the lithium ion battery 1 is provided; the distance between adjacent fins 2 is equal to the thickness of the lithium ion battery 1 ; the adjacent fins 2 are closely attached to the two longitudinal surfaces of the middle lithium ion battery 1 .

[0031] The surfaces of the fins 2 and the liquid cooling plate 3 are nitrided, and the liquid cooling plate is provided with a cooling liquid inlet 30 and a cooling liquid outlet. When the system is running, the low-temperature coolant enters the cooling plate 3 through the coolant inlet 30, and circulates out of the cooling plate 3 from the coolant inlet and outlet to keep the cooling plate 3 at a low temperature. Part of the heat...

Embodiment 2

[0034] In this embodiment, a lithium-ion battery liquid cooling system, on the basis of Embodiment 1, also includes an airtight cabin; the airtight cabin is filled with oil and silicone oil; all lithium-ion batteries 1 and fins 2 are placed in the silicone oil in the airtight cabin; The airtight cabin is also connected with silicon oil cooling circulation equipment, which is used to circulate and cool the silicone oil in the airtight cabin.

[0035] The lithium-ion battery 1 and the fins 2 are placed in the silicone oil, one is to strengthen the heat exchange and discharge the heat of the lithium-ion battery in time; the other is to maintain insulation in the silicone oil to improve the service life.

[0036] In the present invention, part of the heat generated by the lithium-ion battery 1 is exchanged through the contact surface between the bottom of the battery and the cooling plate 3, and part of the heat is exchanged between the fins 2 and the cooling plate 3;

[0037] The...

Embodiment 3

[0039] This embodiment is a lithium-ion battery energy storage system, including a lithium-ion battery cooling system provided in embodiment 1 or embodiment 2 and several lithium-ion batteries 1 .

[0040] The lithium-ion battery 1 is installed in the corresponding installation space; the adjacent fins 2 are in close contact with the two longitudinal surfaces of the middle lithium-ion battery 1 ; one lateral surface of the lithium-ion battery 1 is in close contact with the surface of the liquid cold plate 3 .

[0041] When the system is running, the low-temperature coolant enters the cooling plate 3 through the coolant inlet 30, and circulates out of the cooling plate 3 from the coolant inlet and outlet to keep the cooling plate 3 at a low temperature. Part of the heat generated by the lithium-ion battery 1 contacts the cooling plate 3 through the bottom of the battery The heat exchange is realized on the surface, and the other part of the heat is exchanged with the cooling pla...

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Abstract

The invention belongs to the field of lithium ion batteries, and discloses a lithium ion battery liquid cooling system and an energy storage system. The lithium ion battery liquid cooling system comprises a liquid cooling plate; at least two fins which are arranged on the liquid cooling plate; and a lithium ion battery mounting space which is arranged between every two adjacent fins. The fins are arranged on the surface of the cooling plate, and the lithium ion batteries are arranged between the adjacent fins; when the system runs, low-temperature cooling liquid enters the cooling plate through the cooling liquid inlet, so that the cooling plate is kept at a low temperature, one part of heat generated by the battery exchanges heat with the contact surface of the cooling plate through the bottom of the battery, the other part of heat exchanges heat with the cooling plate through the fins, the longitudinal temperature difference of the battery module is effectively reduced, and heat management of the battery is further realized.

Description

technical field [0001] The invention belongs to the field of lithium ion batteries, and in particular relates to a liquid cooling system and an energy storage system for a lithium ion battery. Background technique [0002] In the large-scale application of energy storage systems, prefabricated cabin energy storage systems are gradually becoming the mainstream application form due to their outstanding flexibility and convenience. Judging from the existing and under-construction energy storage power stations, most of the energy storage systems are prefabricated cabins. Compared with traditional fixed energy storage power stations, the modular design of the prefabricated cabin energy storage system adopts standardized container sizes, allowing ocean and road transportation, and can be hoisted by overhead cranes, with strong mobility and no geographical restrictions. In addition, the prefabricated cabin energy storage system can be factory-produced and assembled and debugged di...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M10/613H01M10/627H01M10/6551H01M10/6554H01M10/6556H01M10/6567H01M10/0525
CPCH01M10/613H01M10/627H01M10/6551H01M10/6554H01M10/6556H01M10/6567H01M10/0525Y02E60/10
Inventor 刘皓赖铱麟渠展展杨凯高飞张明杰范茂松耿萌萌
Owner CHINA ELECTRIC POWER RES INST