Battery casing, battery, battery pack and electrical equipment

CN118645743BActive Publication Date: 2024-12-10BYD CO LTD
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Patent Information

Application Number
CN202411088862.4
Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
Filing Date
2024-08-09
Publication Date
2024-12-10
Estimated Expiration
2044-08-09

AI Technical Summary

Technical Problem

Lithium-ion batteries are deficient in liquid due to electrolyte sinking during use, which affects battery life and safety, and the prior art is difficult to effectively solve this problem.

Method used

A battery case is designed, including a shell body and a flow guide. The shell body is equipped with a storage cavity for receiving the electrode core and a liquid accumulation tank for receiving the electrolyte. The flow guide is arranged on the inner side wall of the shell body for use in The electrolyte in the effusion tank is directed to the side of the electrode core or the top of the shell body to ensure that the electrode core is fully infiltrated with the electrolyte and reduce the deposition of the electrolyte at the bottom of the shell body.

Benefits of technology

Through the design of the flow guide, the supply consistency of the electrode core to the electrolyte is improved, the battery life is extended, the electrolyte is reduced to the bottom of the shell body is reduced, and the battery's safety performance is improved, especially in lithium-ion batteries. Lithium evolution phenomenon extends the service life of the battery.

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Abstract

The present application relates to the field of battery technology, and in particular to a battery case, a battery, a battery pack, and an electrical device. The battery case includes a shell body and at least one guide member, the shell body has a receiving cavity for receiving a pole core, the bottom of the shell body has at least one liquid storage tank for receiving an electrolyte, the guide member is arranged on at least one inner side wall of the shell body, and the guide member is used to guide the electrolyte in the liquid storage tank to the side of the pole core close to the top of the shell body. The battery case provided in the embodiment of the present application can replenish the electrolyte for the pole core to avoid lithium deposition in the battery, thereby avoiding affecting the life of the battery.
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