• 主题
高级搜索  >
历史搜索 清空历史
首页> 外文会议>AABC tracks 2017: xEV battery technology, application amp; market and chemistry amp; materials for lead-based batteries >Internal Short Circuit Detection and Examples of Early Implementations
【24h】

Internal Short Circuit Detection and Examples of Early Implementations

机译：内部短路检测和早期实现示例

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

Li-ion batteries are critical to the commercial success of xEVs. The superior energy and power on both a weight and volume basis has made this chemistry the clear choice for these applications. However, this high-energy content is a direct consequence of the use of active materials and electrolytes which are extremely energetically reactive. Under certain triggers/abuses, Li-ion cells can experience thermal runaway, i.e., a rapid increase in cell temperature accompanied by venting, vent-with-flame, ejection of cell parts, fire and explosion. Internal short circuits causing failures in the field typically develop after some period of normal cell operation and occur in cells that passed all manufacturing safety and quality control screening. No adequate safety test to screen for future internal short development has been available, in part because these conditions develop slowly in the field and are not detectable at the point of manufacture. Recent events have heightened awareness that internal short circuits are a major cause of Li-ion battery safety events. We have developed multiple distinct, non-invasive and chemistry-agnostic technologies for sensitive early detection of developing internal shorts in Li-ion batteries before the shorts pose a thermal runaway threat. These technologies are based on extensive research into the underlying electrochemistry governing internal shorts, and on experience gained through safety audits of failures of Li-ion batteries in the field. They comprise hardware and software developed to utilize electrical markers only present when an internal short is present and deliver warning signals proportional to short severity. These technologies can be integrated with standard battery management electronics employed in Li-ion battery packs and provide early warning of incipient internal shorts that may lead to unsafe conditions. Furthermore, the internal short detection monitoring architectures are intrinsically suited to redundant implementations so that the system remains functional even if part of it is damaged or becomes non-operational. We have advanced two of these technologies to the point that they are ready for implementation in battery systems. In this poster presentation, we highlight how CAMX Power is implementing short detection for selected applications and will describe examples of its use and benefits. Implementation requires direct evaluation of the sensing technology in batteries that are fully fitted with protective components used in the field as well as batteries that are experiencing charge/discharge profiles. We will focus especially on data for large cells that might be employed in xEV applications as well as alternative xEV battery implementations that are based on large cell count battery packs employing smaller cells such as 18650s. We will show examples of real time signals illustrating detection of internal shorts staged in various cells in large cell arrays that are experiencing simultaneous charge-discharge cycleing.
机译：锂离子电池对于xEV的商业成功至关重要。无论是重量还是体积，卓越的能量和功率使该化学成为这些应用的明确选择。然而，这种高能量含量是使用极具能量反应性的活性材料和电解质的直接结果。在某些触发/滥用情况下，锂离子电池可能会遭受热失控，即电池温度快速升高，并伴有通风，火焰燃烧，电池部件弹出，着火和爆炸。通常会在正常的电池运行一段时间后，导致在现场导致内部故障的内部短路，并在通过所有制造安全和质量控制筛选的电池中发生内部短路。目前尚无足够的安全测试来筛选将来的内部短路问题，部分原因是这些条件在现场发展缓慢，在制造时无法检测到。最近发生的事件使人们更加意识到内部短路是锂离子电池安全事件的主要原因。我们已经开发出多种独特的，非侵入性的和化学不可知的技术，可以在短路造成热失控威胁之前，灵敏地及早发现锂离子电池内部短路。这些技术基于对控制内部短路的潜在电化学的广泛研究，以及通过对锂离子电池故障进行安全审核而获得的经验。它们包括经过开发的硬件和软件，可以利用仅在内部短路时才存在的电子标记，并发出与短路严重性成比例的警告信号。这些技术可以与锂离子电池组中使用的标准电池管理电子设备集成在一起，并针对可能导致不安全状况的初期内部短路提供预警。此外，内部短路检测监视体系结构本质上适用于冗余实现，因此即使部分系统损坏或无法运行，系统仍可正常运行。我们已经将其中的两项技术进行了改进，以使其可以在电池系统中实施。在此海报演示中，我们重点介绍CAMX Power如何对选定的应用程序实施短路检测，并将描述其使用和好处的示例。实施需要直接评估完全装有现场使​​用的保护组件的电池以及正在经历充电/放电曲线的电池中的传感技术。我们将特别关注xEV应用中可能使用的大型电池的数据，以及基于采用较小电池（例如18650s）的大型电池组电池组的替代xEV电池实现。我们将显示实时信号的示例，这些信号说明检测同时经历充放电循环的大型电池阵列中各个电池内发生的内部短路。

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