Lithium-ion power battery charging and discharging method

Abstract

The invention discloses a lithium ion power battery charging and discharging method, which overcomes the problem of short service life of the battery in the prior art, and comprises a first charging and discharging method and a second charging and discharging method.The first charging and discharging method is to limit the charging power of the lithium iron phosphate battery system, and the secondcharging and discharging method is used for limiting the charging electric quantity and the discharging electric quantity of the ternary and high-voltage ternary battery system. The charging and discharging voltage interval of the battery is strictly limited, the charging and discharging voltage is controlled, charging and discharging under the condition of a low SOC interval are prevented, the internal stress of the battery is reduced drastically, overcharging caused by charging and discharging under the condition of a high SOC interval of the ternary battery is reduced, and the service lifeof the lithium ion battery can be prolonged.

Description

technical field [0001] The invention relates to the technical field of lithium-ion battery applications, in particular to a charging and discharging method for a lithium-ion power battery capable of prolonging the service life of the lithium-ion battery. Background technique [0002] The service life of lithium-ion power and energy storage batteries determines their cost-effectiveness. With people's increasingly stringent pursuit of energy-saving and emission-reducing value of power batteries, power batteries that adapt to long-life cycles should not only start with battery materials, battery cell consistency control, etc. The charge and discharge state control during battery use is also very important. The prior art does not limit the charging and discharging range and operating range voltage of the battery, resulting in a short operating life of the battery. [0003] For example, a "a battery multi-stage temperature control discharge method, device and system" disclosed i...

AI Technical Summary

Problems solved by technology

[0004] The present invention aims to overcome the problem of short operating life of batteries in the prior art, and provides a charging and discharging method for lithium-ion power batteries. The method strictly limits the charging and discharging voltage interval of the battery, controls the charging and discharging voltage, and prevents charging and discharging under low SOC interval conditions. , reduce the severe internal stress of the battery, reduce the overcharge of the ternary battery under the condition of high SOC range, and prolong the life of the lithium-ion battery