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14 小时
宝马大圆柱电池,如何解特斯拉头疼的量产难题?
比如在冲压工艺上,与方形电池常用的铝壳不同,46系列大圆柱电池多采用镀镍钢壳保证结构强度和抗腐蚀性。钢材的屈服强度、硬度和弹性模量都高于铝材,也就意味着塑性差于铝材,在同样的拉伸冲压加工下,达到同样的形变需要更大的冲压力。
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