Battery cells, batteries and electrical devices

By incorporating a lithium replenishment component within a single battery cell, and using an insulating outer shell and inner shell to sandwich the replenishment component, which is then connected to the electrode assembly via conductive components, the problem of lithium-ion consumption during charging and discharging of lithium-ion batteries is solved, thereby improving the battery's cycle efficiency and stability.

CN116470122BActive Publication Date: 2026-05-26CONTEMPORARY AMPEREX TECHNOLOGY CO LTD
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
CONTEMPORARY AMPEREX TECHNOLOGY CO LTD
Filing Date
2022-01-11
Publication Date
2026-05-26

AI Technical Summary

Technical Problem

During the charging and discharging process, lithium ions are consumed, leading to a decrease in battery capacity and energy density. Existing lithium replenishment methods pose safety risks or performance impacts.

Method used

A lithium replenishment assembly is provided between the battery cell casing and the electrode assembly. The assembly includes an insulating outer shell and an inner shell, with a lithium replenishment component sandwiched between them. Lithium ions are replenished to the electrode assembly through an ion channel and connected to the lithium replenishment electrode through a conductive component to achieve lithium ion replenishment.

Benefits of technology

This reduces the consumption of lithium ions on the positive electrode during the first charge, improves the battery's cycle efficiency and lifespan, and reduces the risk of the casing becoming charged, thus enhancing the battery's stability and performance.

✦ Generated by Eureka AI based on patent content.

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    Figure CN116470122B_ABST
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Abstract

This application provides a battery cell, a battery, and an electrical device. The battery cell includes a housing, an electrode assembly, an end cap assembly, and a lithium replenishment assembly. The housing has an opening. The electrode assembly is housed within the housing. The end cap assembly closes to the opening to enclose the electrode assembly within the housing. The lithium replenishment assembly is disposed between the electrode assembly and the housing, and includes an insulating outer shell and an inner shell with ion channels. The insulating outer shell insulates and isolates the electrode assembly and the housing. A lithium replenishment element is sandwiched between the insulating outer shell and the inner shell, and the lithium replenishment element replenishes lithium ions to the electrode assembly through the ion channels. The lithium replenishment assembly can insulate and isolate the housing from the electrode assembly when the battery cell is in use, preventing the housing from becoming charged; it can also replenish the negative electrode plate with lithium ions to form an SEI film during the first charge of the battery cell; and it can also provide lithium ions to the negative or positive electrode plate during the charging and discharging process of the battery cell to replenish the lithium ion consumption in the electrode assembly.
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