充电设施对电池管理系统保护需求响应评估

充电状态下的电动汽车动力电池或电池管理系统(BMS)出现异常时,充电设施应能可靠响应,以确保充电安全。文中分析了BMS保护需求,定义了充电设施对BMS保护需求的响应率;参考现有标准及工程实际,建立了响应率指标体系,涵盖了动力电池故障及BMS故障等评价指标。采用层次分析法对各项指标权重进行了分析计算;最后,结合实际工程数据,对两种充电设施的响应率进行评估,基于单项响应率和综合响应率等指标,找出充电设施对动力电池及BMS故障响应能力的薄弱环节,并根据评估结果提出提高响应率的措施。结果表明,响应率指标体系可量化评估充电设施对BMS保护需求的响应能力。

Response Assessment of Charging Facilities to Protection Demands of Battery Management Systems

In the process of charging electric vehicle, the charging facilities(CF)should be able to reliably respond to the protection of battery management system(BMS)when the power battery and BMS are abnormal. This paper analyzes the protection demands of BMS, and defines the response rate of CF to the protection demand of BMS. By referring to the existing standards and engineering practice, the indicator system of response rate is developed, which covers the evaluation indicators of power battery failure and BMS failure. The weights of indicators are calculated by the analytic hierarchy process(AHP)method. Finally, with the assessment of the response rates of two CFs, the weak link of charging system is found according to the indicators of single response rate and comprehensive response rate, while measures to improve the response rate are proposed. The result shows that the response rate is able to quantify the response ability of CF to BMS protection demand.