软包磷酸铁锂电池高电压浮充后热安全研究
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尹涛, 贾隆舟, 常修亮, 戴作强, 郑莉莉
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Research on thermal safety of soft-pack LiFePO4 battery after high-voltage float charge
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Tao YIN, Longzhou JIA, Xiuliang CHANG, Zuoqiang DAI, Lili ZHENG
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表3 4.05、4.25和4.50 V电压浮充后电池高温热失控特征参数汇总表
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Table 3 Summary table of battery high temperature thermal runaway characteristic parameters after 4.05, 4.25 and 4.50 V voltage float charge
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| 特征参数 | 新电池 | 4.05 V | 4.25 V | 4.50 V | 5.0 V |
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| Q/Ah | 21.363 | 21.380 | 21.317 | 21.336 | 20.990 | | T/℃ | 125.24 | 132.76 | 131.41 | 125.56 | — | | t1/s | 36354 | 24697 | 27436 | 34025 | — | | Td/℃ | 138.46 | 144.46 | 149.82 | 152.73 | — | | t2/s | 37560 | 25263 | 28480 | 35483 | — | | Ts/℃ | 284.36 | 249.86 | 275.68 | 278.65 | — | | t3/s | 38312 | 25686 | 28986 | 36196 | — | | t3-t2/s | 752 | 423 | 506 | 713 | — | | t3-t1/s | 1958 | 989 | 1550 | 2171 | — | | Tm/℃ | 562.08 | 484.67 | 520.55 | 516.08 | — | | dT/dt max/(℃/min) | 392.97 | 298.67 | 305.35 | 315.08 | — | | 热失控前后质量变化/g | 421.30/341.46 | 427.06/341.18 | 421.65/336.94 | 421.31/334.25 | 422.57/396.63 | | 减重比/% | 18.95 | 20.11 | 20.85 | 20.6 | 6.14 |
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