深海环境锂离子电池荷电状态分析

Analysis of Lithium Ion Battery SOC Under Deep Sea Environment

针对应用于某4500 m深度等级载人潜水器的充油锂离子电池,对于其深海环境下的典型工况,即下潜、作业和上浮过程,在不同深度下分析了110 V主电池的荷电状态(SOC)与工作电流的关系,同时分析了SOC与工作环境、温度的关系,在陆上分别模拟了常温常压充放电循环试验、低温容量测试和常温高压强放电循环试验,还比较了实际下潜时并联电池模块之间SOC的变化特点,发现深海低温环境和不同的工作电流对锂离子电池的SOC有较明显作用,在此可以对锂离子电池在深海环境的使用提供相关技术参考。

For application on a 4500 meters deep level of oil charge lithium ion battery in manned submersible,as for its typical deep sea environment condition of diving,working and floatation,the state of charge of 110 V main battery is analyzed under different environment temperature and load current,and the charge and discharge cycle test at room temperature and pressure,low temperature capacity test and high pressure discharge cycle test are simulated on land,and the analysis is also done between parallel modules,it seems that the deep sea low temperature environment and different load current have obvious effect on lithium ion battery,it can provide reference for the application of lithium ion batteries in deep sea environment.