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Aging refers to loading and running a product at a certain temperature and/or load, and testing whether the performance indicators of the product meet technical requirements after a period of time or cycling.

The aging of lithium-ion batteries generally refers to the placement after the first charging after the completion of battery assembly and liquid injection. It can be aged at room temperature or high temperature, and is used to stabilize the properties and composition of the sei film formed after the initial charging. The normal temperature aging temperature is 25 degrees, and the high temperature aging varies from factory to factory, with some ranging from 38 degrees to 45 degrees, and the duration is between 48 and 72 hours.

Aging can be divided into two situations: opening aging and sealing aging:

For batteries with open aging, if the relative humidity can be controlled below 2% for room temperature aging, it is better to seal them after aging,

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