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英国储能系统安全风险分析(英文)

电池广告

将电池用于家庭储能不仅是对电网供电的一种有吸引力的“清洁”选择,而且通过最大限度地利用可再生能源或由第三方使用电池来为消费者提供经济优势。提供网格服务。尽管这些系统的高成本一直是其增长的限制因素,但电动汽车 (EV) 市场的增长继续压低现代锂离子 (Li-ion) 电池的价格,预计这将进一步刺激市场。
尽管国内电池储能系统 (BESS) 的事故鲜为人知,但在国内环境中使用大型电池仍存在安全隐患。针对这一问题,本报告受委托对国内 BESS 的潜在故障机制、与故障相关的危害、风险缓解以及现有安全标准和目前正在制定的标准进行广泛研究。报告发现,如果制造商和安装商遵循最佳行业实践和标准,他们可以显着降低 BESS 住宅应用中的风险。
• 该评估的一部分涉及与利益相关者面谈,以便更好地了解他们的担忧,收集他们的改进建议,并解决他们的问题。一个特别重要的观点是,由于行业处于引入 BESS 的早期阶段,现在是时候考虑所有潜在情况以及如何正确地做事,建立不仅适用于现在而且适用于未来的标准和指南当 BESS 可能广泛传播并成为日常生活的一部分时。
建立技术上合理、有意义的安全标准对于 BESS 的成功至关重要。
根据最近的多项研究,锂离子电池的主要火灾特性可归纳为以下三个危险类别:
• 当电池组发生故障和热失控通过电池组传播时,电池组内部深处会产生过多的热量,这凸显了设计电池组的必要性,以最大限度地降低传播风险并限制电池/模块之间的火势蔓延。早期检测和冷却单个电池的方法,因为它们开始出现故障,对于避免整个系统的热失控很重要。
• 电池和电池组故障会产生大量气体,这是由于系统升温时压力迅速升高和排气口释放造成的。在包装和系统设计中必须考虑对产生的气体的管理。
电池起火产生的气体的毒性可能需要在通风系统的设计中特别考虑。
从电池到系统设计和系统安装,各个层面的风险缓解都有很多可能性。许多缓解风险和要求都包含在现有标准或正在制定的标准中。以下是有关风险缓解的一些注意事项:
电池管理系统 (BMS) 在将电池保持在电压、电流和温度的工作窗口内方面发挥着核心作用。 BESS 安全标准具有适用于 BMS 的特定要求和测试。

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