Influence of SOC on the storage performance of Li-ion battery and the screening process of K value
The state of charge (SOC) and aging process of Li-ion battery have important influence on the storage performance of the battery,and the preparation and performance of the module.The influence of the SOC on the storage performance of lithium iron phosphate Li-ion battery is studied.When the battery is stored at high temperature (60 ℃) for a long time,the gas production of the battery becomes serious with the decrease of the SOC,the side reaction on the anode is the main source of gas production.At 30％ SOC,the battery can be in an ideal storage state with less gas production.At 30％ SOC,the K-value screening process is optimized by adjusting the aging time at 45 ℃ and room temperature.High-temperature aging is beneficial to distinguish cells with different self-discharge rates.The charge-discharge consistency test shows that the charge-discharge voltage difference of the module decreases and the consistency of the battery increases with the increase of high-temperature aging time.The experimental results provide a reference solution for the long-term storage,transportation and preparation of lithium iron phosphate Li-ion battery.
lithium iron phosphateLi-ion batterystate of charge (SOC)high temperature agingmodule
国家科技期刊平台
NSTL
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