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2015•Unpublished venueOpen access

Analysis of Lithium Iron Phosphate Battery Damage

Yinquan Hu, Xiaobing Wu, Guorui Hu, Qiheng Fan

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Abstract

Charge-discharge experiments of lithium iron phosphate (LiFePO 4 ) battery packs have been performed on an experimental platform, and electrochemical properties and damage mechanism of LiFePO 4 batteries are also analyzed in extreme cases.Our results indicate that overcharge has little impact on utilizable capacity of the battery in the short term.Over-discharge has a huge impact on utilizable capacity of the battery.Based on these results, a management method of battery pack for reducing battery damage is proposed.At the same time, this method can also slow the rate of battery pack capacity attenuation and extend cycle life of battery pack.

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What this paper is about

Charge-discharge experiments of lithium iron phosphate (LiFePO 4 ) battery packs have been performed on an experimental platform, and electrochemical properties and damage mechanism of LiFePO 4 batteries are also analyzed in extreme cases.Our results indicate that overcharge has little impact on utilizable capacity of the battery in the short term.Over-discharge has a huge impact on utilizable capacity of the battery.Based on these results, a management method of battery pack for reducing battery damage is proposed.At the same time, this method can also slow the rate of battery pack capacity attenuation and extend cycle life of battery pack.

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Available abstract

Charge-discharge experiments of lithium iron phosphate (LiFePO 4 ) battery packs have been performed on an experimental platform, and electrochemical properties and damage mechanism of LiFePO 4 batteries are also analyzed in extreme cases.Our results indicate that overcharge has little impact on utilizable capacity of the battery in the short term.Over-discharge has a huge impact on utilizable capacity of the battery.Based on these results, a management method of battery pack for reducing battery damage is proposed.At the same time, this method can also slow the rate of battery pack capacity attenuation and extend cycle life of battery pack.

Key concepts: Overcharge, Lithium iron phosphate, Battery (electricity), Battery pack, Capacity loss, Charge cycle, Materials science, Automotive battery

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