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The purpose of pre charging lithium-ion batteries

Due to the high energy ratio of lithium-ion batteries, entering the fast charging mode directly can cause damage to the battery, affect its lifespan, and potentially pose safety hazards. When charging lithium-ion batteries, it is possible to damage the battery due to excessive constant current. Therefore, pre charging should be carried out first to activate the active substance before charging the battery normally.

Although lithium-ion batteries are currently designed with built-in circuit protection boards, the probability of overcharging is usually low. However, if the battery is not pre charged at first, it can bring many hidden dangers, such as protection board failure, long-term self discharge rate, etc. When the battery is over discharged, it will make it difficult to recover the active substance. Therefore, it is necessary to first charge it to 2.5V to 3.0V with a small current, and then convert it to fast charging. Pre charged small batteries can effectively handle the charging problem of discharged batteries.

So experts suggest that consumers should have a correct understanding of the importance of pre charging lithium-ion batteries. The reason why lithium-ion batteries have increased pre charging function during the design process is because of this. Therefore, new batteries must be pre charged and appropriate constant current values should be selected for charging.

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