Storage precautions for lithium ion batteries

During the use and suspension of the lithium battery, the battery continuously forms/consumes the SEI film, which will generate a negative electrode film-forming gas, which will cause flatulence (bulging). The internal crystal of the lithium battery is too active to cause the battery to swell (drum), the general reason the battery is over charged, over discharged, charging current is too large, long-term full power storage. Lithium battery internal crystal long-term activity is high, will make the battery slowly bulge, long time is full state, this chemical reaction has been at a faster rate, although the self-discharge rate of the battery is relatively low, the chemical reaction continues, and the reaction speed is faster than the terminal voltage of 3.8V.

Battery manufacturer: Lithium battery, regardless of use or not, will inevitably lose capacity over time. This refers to the loss of irreparability. Lithium battery starts from the factory and the chemical reaction that causes capacity loss Start slowly, when the battery voltage is relatively high, the faster the reaction, so if the lithium battery is not used for a long time, the terminal voltage is 3.8V, so that the above reaction is not too fast, and the long-term storage will not be depleted. 3.8V is the result of comprehensive consideration, so the new factory's new lithium battery is mostly 3.7-3.9V. The battery protection board in the lithium battery pack has more or less self-consumption current, so the inferior protection board is likely to increase the self-consumption current value, which will indirectly cause irreversible capacity loss of the battery.

At the same time, there are drawbacks in the long-term storage of lithium battery full power: 1.It will increase the safety hazard 2. Accelerate battery aging; Digital battery has real-time battery status monitoring and use monitoring function, the battery is not used for a long time (>10 days), and the battery is at When the battery is fully charged, the battery storage function will be automatically turned on to automatically stop the storage function when the average battery voltage is reduced to 3.8V (or the minimum voltage drops to 3.75v when the battery pack is unbalanced); the digital battery is stored in the storage process. In the process, once the battery is operated by the user, the storage process can be terminated without affecting the user's use; when the battery is in the rest state, the time accumulation is restarted.

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