Scientists reveal lithium battery explosion: design flaws leading to expansion battery explosion-IT information
Digital Trends website reported that lithium-ion batteries are widely used in a variety of electronic products, Samsung fire, explosion causes recall Galaxy Note7 make people aware of the lithium-ion battery safety issues: they will swell, and may cause a fire or explosion, causing accidents.
In a paper published in the journal of the Electrochemical Society, scientists at the Canadian Light Source research expands internal lithium-ion battery for more changes.
Energy storage and the composites, researchers Toby? bond (Toby Bond) to Digital Trends, said, "we would like to know when the lithium-ion battery produces gas and expansive Imaging pillow shape, its internal changes. Lithium-ion expansion caused by many reasons, but usually it is overheating, overcharging, or other extreme conditions. Many lithium-ion battery expansion will not lead to serious consequences – some can even continue to use, but inflation may be the harbinger of a fire or explosion. ”
Digital Trends says research team using high resolution CT (computer tomography), creating gas and expansion before and after the three-dimensional images of the internal lithium-ion battery.
Bond said, "we found that the electrodes arrangement styles of some minor deficiencies, when expanded, these weaknesses will become more apparent. This may affect the status of battery, because the expansion of the inconsistency will affect the pressure distribution inside the battery. ”
Digital Trends says, it is not clear whether the expansion was recently associated with lithium-ion batteries of blame for the disaster, but the Canadian Light Source research in a way that reveals a potentially significant design flaws. In view of the many electric vehicles use lithium-ion batteries for the same design-but on a larger scale, hopes that this study will help improve the battery.
Bond said, "we have revealed the product expansion of lithium ion battery in the process of internal change, we hope that battery manufacturers can take advantage of our research results to better understand the expansion process. If these tiny manufacturing flaws can cause a significant impact, manufacturers can better control them, or modifying the internal structure to prevent cell swelling, thus producing a more secure cell. ”
科学家揭秘锂电池
爆炸：设计缺陷导致膨胀变形 - 电池,
爆炸 - IT资讯
据Digital Trends网站报道，锂离子电池被广泛应用在各种电子产品中，三星因起火、爆炸原因召回Galaxy Note7让人们意识到锂离子电池存在安全问题：它们会膨胀，然后就可能起火或爆炸，酿成安全事故。
在《电化学学会期刊》发表的一篇论文中，Canadian Light Source的科学家研究了锂离子电池膨胀时内部的详细变化。
能源存储和复合材料研究人员托比?邦德(Toby Bond)向Digital Trends表示，“我们希望了解，当锂离子电池产生气体并膨胀成像枕头那样的形状时，其内部的变化。引起锂离子膨胀的原因有许多，但通常是过热、过充电，或其他一些极端情况。许多锂离子电池膨胀后不会造成严重后果——有些甚至还能继续使用，但膨胀也可能是起火或爆炸的先兆。”
Digital Trends表示，研究团队利用高分辨率CT(电脑断层扫描)，创建产生气体并膨胀前、后锂离子电池内部的三维图像。
邦德表示，“我们发现，电极排列方式存在一些小缺陷，当电池膨胀后，这些缺陷会变得更为明显。这可能会影响到电池之后的状况，因为膨胀的不一致性，会影响电池内部压力的分布。”
Digital Trends称，目前尚不清楚这种膨胀是否就是最近与锂离子电池有关的灾难的罪魁祸首，但Canadian Light Source的研究在某种程度上揭示了潜在的重大设计缺陷。鉴于许多电动汽车都使用相同设计的锂离子电池——不过规模更大，希望这一研究有助于提高电池安全性。
邦德表示，“我们已经初步揭示了商品化锂离子电池膨胀过程中内部的变化，我们希望电池制造商能利用我们的研究成果，更好地了解膨胀过程。如果这些微小的制造缺陷会引发重大影响，厂商可以通过更好地控制这些缺陷，或修改电池内部结构，防止电池不断膨胀，从而生产出更安全的电池。”