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首页> 外文会议>Battery engineering symposium 2019 >Validating Material Purity Using X-Ray Technology to Improve Safety and Yield of LIB
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Validating Material Purity Using X-Ray Technology to Improve Safety and Yield of LIB

机译：使用X射线技术验证材料纯度以提高LIB的安全性和产量

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摘要

The production volume of lithium-ion batteries (LiB) for automotive purpose is dramatically increasing year by year. LiB are widely used in mobile devices, but over heating and ignition accidents have been reported. It is essential to improve safety and yield of batteries at site of LiB manufacturing. One of the causes for decreasing safety and yield is the internal short circuit due to metal particle contamination in LiB, and management of metal particle contamination is getting more important. Inspection of metal particle contamination in LiB used for electric vehicle is required to obtain measurement results faster, which is required to build up new inspection and analysis methods urgently. Therefore, in this study, we examined the application of X-ray fluorescence analysis and X-ray transmission imaging as rapid inspection methods for LiB to reduce internal short circuits. Three types of samples, (1) a separator, (2) an electrode plate, and (3) an electrode conductive material, were used to determine the detection time of 20um diameter contaminant metal particles within samples 250 mm × 200 mm in size and to evaluate the identification capabilities of the elemental analysis. As a result, the metal particles were detected in approximately 5 minutes for the separator, approx. 10 min for the electrode plate, and approx. 18 min for the electrode conductive material, respectively. Moreover, elements can be identified by fluorescent X-ray, and it is proved that metal particle inspection in a large-sized LiB can be performed in a short period of time. In conclusion, this rapid effective analysis method could contribute to process improvement and reduce internal short circuits, furthermore, which can be expected to improve safety and yield of batteries.
机译：汽车用锂离子电池（LiB）的产量逐年急剧增长。 LiB广泛用于移动设备中，但是已经报道了过热和着火事故。在LiB生产现场提高电池的安全性和成品率至关重要。安全性和良率降低的原因之一是由于LiB中金属颗粒污染引起的内部短路，并且金属颗粒污染的管理变得越来越重要。为了更快地获得测量结果，需要检查用于电动车辆的LiB中的金属颗粒污染，这是紧急建立新的检查和分析方法所必需的。因此，在这项研究中，我们研究了X射线荧光分析和X射线透射成像作为LiB减少内部短路的快速检查方法的应用。使用三种类型的样品（1）隔板，（2）电极板和（3）电极导电材料来确定尺寸为250 mm×200 mm的样品中直径为20um的污染物金属颗粒的检测时间，以及评估元素分析的识别能力。结果，在约5分钟内检测到分离器的金属颗粒，约为2μm。电极板大约需要10分钟，大约需要10分钟。电极导电材料分别需要18分钟。此外，可以通过荧光X射线识别元素，并且证明可以在短时间内进行大尺寸LiB中的金属颗粒检查。总而言之，这种快速有效的分析方法可有助于改进工艺并减少内部短路，并且有望提高电池的安全性和良率。

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  • 会议地点 Strasbourg(FR)
  • 作者

    Masaaki Muraoka; David Peter Semiono; Keiichiro Shinohara;

  • 作者单位

    Hitachi High-Tech Science Corporation, 24-14, Nishi-shimbashi 1-chome, Minato-ku, Tokyo, 105-0003 Japan;

    Hitachi High-Technologies Europe GmbH, Theodor-Heuss-Anlage 12, Mannheim, D-68165 Germany;

    Hitachi High-Tech Science Corporation, 24-14, Nishi-shimbashi 1-chome, Minato-ku, Tokyo, 105-0003 Japan;

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