Lithium battery charging method, system, device and storage medium

Abstract

The application provides a lithium battery charging method, system, device and storage medium. The method comprises: when a low-temperature charging condition is met, entering a low-temperature charging process; the low-temperature charging process comprises: charging the lithium battery at a preset rate; if a difference between the voltage of the lithium battery and a target voltage is greater than or equal to a first voltage difference, when the voltage of the lithium battery rises by the first voltage difference, reducing the current charging voltage by a second voltage difference and then charging the lithium battery at a constant voltage, and when the lithium precipitation elimination condition meets the switching condition, returning to the step of charging the lithium battery at the preset rate; the second voltage difference is less than the first voltage difference; if the difference between the voltage of the lithium battery and the target voltage is less than the first voltage difference, when the voltage of the lithium battery rises to the target voltage, maintaining the current charging voltage to charge the lithium battery at a constant voltage, and stopping charging when the charging current of the lithium battery is less than a first target current. The method greatly improves the low-temperature charging efficiency.

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