Feasibility of the multistage reuse of commercial LiFePO4/C batteries

doi:10.19799/j.cnki.2095-4239.2021.0317

Abstract

Abstract:

The material recycling of LiFePO₄ batteries has low value; hence, the only way to maximize their value is to reuse them. In this study, a three-stage simulation test is established with different loads to verify the reuse feasibility of LiFePO₄ batteries. The experiment results show that all samples can regularly attenuate before the capacity retention rate becomes higher than 50%. The individual samples suffer from sudden death when the capacity decays to less than 50%. Based on research on the battery decay law during the test, proposals are suggested for the application scenarios of LiFePO₄ batteries at different stages.

Key words: traction batteries, LiFePO₄/C, multi-stage reuse, reuse applications

CLC Number:

TH 3

Tianyi MA, Weizhe WANG, Chunjing LIN, Guangli BAI, Zhen WEI, Shiqiang LIU. Feasibility of the multistage reuse of commercial LiFePO₄/C batteries[J]. Energy Storage Science and Technology, 2022, 11(1): 119-126.

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因素	参数
额定电压/V	3.2
额定容量/(A·h)	1.5
放电截止电压/V	2.5
充电保护电压/V	3.65
尺寸/(mm×mm)	18.3×65
质量/g	43
密度/(g/cm³)	2.52

循环阶段	充电电流	放电电流	性能标定的频率	终止条件
阶段Ⅰ	2 C	2 C	每循环80次	初始容量的70%或初始内阻的120%
阶段Ⅱ	1 C	1 C	每循环50次
阶段Ⅲ	0.5 C	0.5 C	每循环50次

使用阶段	工况强度	典型工况	再利用方式
阶段Ⅰ	高强度	车载工况	成组利用
阶段Ⅱ	中强度	电网储能、基站备电、低速电动车、电动三轮车/两轮车、移动充电站等	成组利用
阶段Ⅲ	低强度	太阳能路灯、工程用灯、便携式LED照明	电芯级单只利用或少量成组利用

Feasibility of the multistage reuse of commercial LiFePO₄/C batteries

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