Efficient drying treatment method for lithium ion battery
CN122107719APending Publication Date: 2026-05-29QINGDAO LISHEN NEW ENERGY TECH CO LTD
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- QINGDAO LISHEN NEW ENERGY TECH CO LTD
- Filing Date
- 2024-11-19
- Publication Date
- 2026-05-29
AI Technical Summary
Technical Problem
In the current lithium-ion battery production process, the method of vacuum baking to remove moisture from the battery is time-consuming and energy-intensive, and the battery may oxidize during the preheating stage, leading to a decline in performance.
Method used
A combination of pre-vacuum, preheating, and heating stages is employed. Through a cyclical process of vacuuming, filling with inert gas, and repeated heating and vacuuming, moisture is ensured to be adsorbed and discharged, thus preventing battery oxidation.
Benefits of technology
It significantly shortens drying time, improves drying efficiency, ensures that the moisture content inside the battery meets the qualified standard, avoids battery oxidation, and improves battery performance.
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Smart Images
Figure CN122107719A_ABST
Abstract
The application discloses a kind of efficient drying treatment methods of lithium ion battery, comprising the following steps: S1, the multiple batteries to be dried are placed into oven, the inside of oven is operated, when reaching preset first vacuum degree value, stop operation;S2, inert gas is filled into oven and starts heating, when temperature rises to preset temperature value, stop heating, when vacuum degree value reaches preset second vacuum degree value, stop filling nitrogen and keep preset first duration;S3, the battery in oven is heated, and the inside of oven is operated, until reaching preset third vacuum degree value, stop, when the vacuum degree in oven increases to preset fourth vacuum degree value, vacuum operation is carried out again;S4, repeat the execution step S3, until the total sum of battery heating time reaches preset baking setting duration, pressure relief and take out battery.The application can avoid the oxidation of battery during temperature rising, make moisture adsorbed in nitrogen be discharged, improve drying efficiency.
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