Battery unit, battery module, and vehicle

By connecting the positive electrode tab to the housing and using multiple connection portions on the electrode tabs, the corrosion issue of battery housings is addressed, resulting in a simplified structure with reduced impedance and extended service life.

JP7864824B2Active Publication Date: 2026-05-25BYD CO LTD
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Patent Information

Authority / Receiving Office
JP · JP
Patent Type
Patents
Current Assignee / Owner
BYD CO LTD
Filing Date
2022-10-18
Publication Date
2026-05-25

AI Technical Summary

Technical Problem

The corrosion of battery housings, typically made of aluminum, occurs due to the reaction with lithium ions forming an aluminum-lithium alloy, which affects the service life of the battery.

Method used

The positive electrode tab is directly connected to the housing, allowing the housing to be charged and preventing corrosion by ensuring it does not react with lithium ions, while reducing internal structure complexity and impedance through multiple connection portions on the electrode tabs.

Benefits of technology

This connection method prevents corrosion of the housing, simplifies the internal structure, and reduces impedance, thereby extending the service life and improving safety of the battery.

✦ Generated by Eureka AI based on patent content.

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Abstract

A battery unit, a battery module, and a vehicle are disclosed. The battery unit includes a housing, an electrode body, a first post, and a second post. A chamber is defined within the housing. The electrode body is disposed in the chamber and includes a first tab and a second tab, one of the first tab and the second tab is a positive electrode tab, and the other of the first tab and the second tab is a negative electrode tab, and the positive electrode tab is connected and electrically connected to the housing. The first post is electrically connected to the first tab. The second post is electrically connected to the second tab.
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