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负极在电池制作各工序段的厚度膨胀研究

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摘要 文章以NCM811软包锂离子电池为平台,研究电池制作过程中各工序段对负极片厚度膨胀的影响。不同类型的石墨制作的负极片在辊压后常温物理搁置过程和注液后的吸液过程中厚度膨胀率变化较小(<3%)。而负极片在真空烘烤过程中厚度变化较大,膨胀率可增加10%以上。电池首次充满电后负极片厚度变化最大,膨胀率可大于20%,总膨胀率大于30%。
出处 《科学大众(科技创新)》 2019年第5期88-88,94,共2页
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