The optimal charging current for lithium batteries has three phases

Daily express the"The lithium battery is for lithium battery charging current "in the process of charging by quick charge from the perspective of the charging current stage, as a dynamic process, lithium battery's charging current is actually divided into three stages.

1, the best in the process of the charging current: when the initial/no-load voltage is lower than the forecast of lithium-ion batteries charging threshold, first of all, through a preliminary stage of charging, as a single lithium ion batteries, the threshold is 3.0 V, commonly at this stage, the charging current in advance about the next stage, about 10% of the constant current charging phase current.

2, constant current charging the best current: the so-called constant current is constant current, voltage, entered the stage of quick charge at this time.Most of the constant current charging current setting between 0.4 ~ 0.6 C, can be understood as 0.5 C, which is under the condition of without considering other factors, can be filled with about two hours.0.5 C, was chosen as the current well done charging charging time and the balance of the security.

3, constant voltage charging charging current: in terms of single section lithium ion battery, when the battery reaches a certain voltage value, namely into the constant voltage charging, the voltage is 4.2 V, commonly at this stage, the voltage constant, current decreased;The current decrease is a passive process, most of the lithium battery protection 0.01 C to terminate the current choice, this means that the charging process into the end state.Once the end of charging, the charging current zero.

Lithium battery at the heart of the best charging current is constant current charging current design, want to stress here is that the most convenient type of lithium battery charge the appropriate design of 0.5 C, such as,18650 lithium batteries conventional capacity is 1800-2600 mAh, can choose 1 A charge, while the ratio for 1200-1500 mAh, charging current is 0.7 A 0.5 C.

Lithium battery charging current largest strictly is determined by the cell structure, therefore, each lithium battery manufacturers.This regulation is not consistent, some set of 0.6 C, portable lithium battery top rules for 1 C.

Of course also cannot ignore constant voltage charging and charging current is designed, in the process of the two, if not less than the initial voltage charging threshold is 3.0 V, there are no charging process.In general, in the constant current charging process before and after the process of brewing a advance and movement to recover is conducive to the long-term use of lithium-ion batteries.

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