石墨烯
锂(药物)
材料科学
离子
薄膜
电荷(物理)
体积热力学
体积膨胀
光电子学
纳米技术
化学工程
化学
物理
热力学
工程类
有机化学
医学
量子力学
内分泌学
内科学
作者
Gerard Bree,Hongqing Hao,Zlatka Stoeva,Chee Tong John Low
出处
期刊:RSC Advances
[The Royal Society of Chemistry]
日期:2023-01-01
卷期号:13 (10): 7045-7054
被引量:3
摘要
Accurate monitoring of battery cell state of charge (SoC) and state of health (SoH) is vital to the safe and effective operation of rechargeable battery systems such as those in electric vehicles yet remains a challenge while the system is in use. A new surface-mounted sensor enabling simple and rapid monitoring of lithium-ion battery cell SoC and SoH is demonstrated. Small changes in cell volume brought about by the expansion and contraction of electrode materials during charge and discharge are detected through monitoring the changes in electrical resistance of a graphene film in the sensor. The relationship between sensor resistance and cell SoC/voltage was extracted, enabling rapid SoC determination without interruption to cell operation. The sensor was also capable of detecting early indications of irreversible cell expansion due to common cell failure modes, enabling mitigating steps to be taken to avoid catastrophic cell failure.
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