【摘要】 传统方法在保护电池短路与过充过程中存在时延过长的问题,为了合理管理电池热量,提高电池性能,延长电池使用寿命,提出基于热分析模型的电池热量管理与安全保护方法。采用平均密度法和理论法分别计算电池密度和电池比热容等电池热特性参数,根据计算结果运用Bernardi生热率模型获取电池生热速率。在此基础上构建电池热分析模型,利用该模型分析差异边界环境中电池在不同生热速率下的生热效果,最后对电池组保护电路进行设计,具体包括充、放电驱动电路、过充保护和短路保护,实现对电池热量的有效管理与安全保护。结果表明该方法可以模拟电池放电升温过程,且与实际情况较为吻合,可以实现电路短路保护和过充保护等功能。更多还原

【Abstract】 The traditional method has the problem of too long time delay in the process of protecting the battery from short circuit and overcharging.In order to rationally manage the battery heat,improve battery performance,and extend battery life,a battery thermal management and safety protection method was proposed based on a thermal analysis model.The battery density and specific heat capacity were calculated by using the average density method and the theoretical method,and the Bernardi heat generation rate model was used to obtain the battery heat generation rate.A battery thermal analysis model was constructed,and the model was used to analyze the heat generation effect of batteries at different heat generation rates in different boundary environments.Finally,the battery pack protection circuit was designed to achieve effective management and safety protection of battery heat,including charge and discharge drive circuits,overcharge protection and short circuit protection.The results show that the method can simulate the process of battery discharge temperature rise,which is more in line with the actual situation,and can achieve the functions of battery short circuit protection and overcharge protection.更多还原