Lithium iron phosphate battery floating charge optimization method

Abstract

The invention provides a lithium iron phosphate battery floating charge optimization method, which comprises the following steps: charging a lithium battery by adopting a plurality of sequentially reduced charging currents until the voltage of the lithium battery reaches a preset step voltage threshold value; carrying out floating charge on the lithium battery for a first time value; and carryingout constant-current discharging on the lithium battery until a preset cut-off voltage is reached. According to the lithium iron phosphate battery floating charge optimization method, in the floatingcharge recycling process of the lithium iron phosphate battery, a stepped charge-floating charge-constant current discharge three-section charge and discharge mode is adopted, and when the floating charge cycle reaches a certain period, deep discharge and constant-current and constant-voltage charge are carried out; and by means of the charging strategy and regular deep discharging and constant-current constant-voltage charging of the lithium iron phosphate battery, degradation of active substances is reduced, the safety performance of floating charging of the lithium iron phosphate battery can be improved, and the cycle service life of the lithium iron phosphate battery can be prolonged.

Description

technical field [0001] The invention relates to the technical field of lithium batteries, in particular to a method for optimizing the float charge of a lithium iron phosphate battery. Background technique [0002] In the field of energy storage, the battery, as an emergency power supply after a power failure, provides power for key equipment and ensures the operation of key switches and equipment, which plays a very important role in the reliability of the system. The reliability of the battery directly affects the reliability of the equipment system. Traditional storage batteries generally use lead-acid batteries, which have disadvantages such as heavy maintenance workload, short life time, and capacity greatly affected by temperature. With the development of system equipment, higher requirements are placed on battery performance, and traditional lead-acid batteries are becoming less and less suitable. Lithium iron phosphate batteries have become a good substitute for lea...

AI Technical Summary

Problems solved by technology

However, because the battery of the storage power station adopts floating charge management, if the charging strategy is unreasonable and accumulated over time, the operating status of the entire battery may be significantly reduced, resulting in overcharge and overdischarge of the battery, resulting in a sharp decline in battery capacity and life.

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