...
  • 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Journal of Energy Storage >Overcharge and thermal destructive testing of lithium metal oxide and lithium metal phosphate batteries incorporating optical diagnostics
【24h】

Overcharge and thermal destructive testing of lithium metal oxide and lithium metal phosphate batteries incorporating optical diagnostics

机译：结合了光学诊断功能的锂金属氧化物和磷酸锂金属电池的过充电和热破坏测试

获取原文
获取原文并翻译 | 示例
           
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

Lithium batteries have a tendency to fail violently under adverse conditions leading to the rapid venting of gas. Overcharge, thermal heating, and a combination of the two conditions are applied here to investigate the gas venting process. A test chamber has been constructed with data recordings including chamber pressure and temperature, battery voltage, current, and surface temperature as functions of time throughout the charging and failure processes. High-speed imaging and schlieren flow visualization are used to visualize the gas venting process. A direct comparison between lithium iron phosphate based K2 26650 and lithium nickel manganese cobalt oxide LG 18650 cells is made through a test series of the three failure methods. Failure under thermal, overcharge, and thermal-overcharge conditions are generally similar in terms of the gas venting process, but are observed to have increasingly energetic failures. The thermal-overcharge abuse condition demonstrates an ability to reconnect via internal short circuit even after an initial electrical failure seen as the refusal to accept charge. This reconnection is associated with a secondary, more energetic failure which can produce weak shock pressure waves.
机译：锂电池在不利条件下会剧烈失效，从而导致气体快速排出。在此应用过充，热加热以及这两种条件的组合来研究排气过程。在整个充电和故障过程中，测试室的数据记录包括时间，压力，温度，电池电压，电流和表面温度。高速成像和schlieren流量可视化用于可视化排气过程。通过一系列三种失效方法的测试，直接比较了磷酸锂铁基K2 26650和锂镍锰钴氧化物LG 18650电池。就排气过程而言，在热，过充和热过充条件下的故障通常相似，但观察到的故障越来越多。热过充电滥用情况表明，即使在最初的电气故障（被视为拒绝接受充电）之后，也可以通过内部短路重新连接。这种重新连接与继发的，更有力的故障有关，后者可能产生微弱的冲击压力波。

著录项

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱：kefu@zhangqiaokeyan.com

京公网安备：11010802029741号 ICP备案号：京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有

  • 客服微信

  • 服务号