The utility model discloses a differential thickness steel shell for battery, the differential thickness steel shell for battery comprises a cylinder body, a sealing end, a transition section between the cylinder body and the sealing end, wherein the differential thickness marking line of the differential thickness steel shell for battery is located in the cylinder body. The differential thickness steel shell for battery disclosed by the utility model can separate the differential thickness steel shell and the transition line by setting the differential thickness steel shell on the cylinder body. Because the transition section is located between the cylinder body and the sealing end, the strength of the transition section is improved, and the probability of the battery bulge outside the deformation area is effectively reduced when the battery is sealed and crimped; at the same time, the differential thickness steel shell is only changed by changing the differential thickness steel shell The position of the line can reduce the possibility of battery bulge in the deformation prone area when the battery is sealed and crimped, without increasing the work station and die structure, and without increasing the production cost.
【技术实现步骤摘要】
电池用差厚钢壳
本技术涉及电池壳
，更具体地说，涉及一种电池用差厚钢壳。
技术介绍
差厚钢壳因其显著的优越性，逐渐被广泛应用于电池。如图1所示，差厚钢壳包括：筒身本体13，位于筒身本体13底端的正极端14，位于筒身本体13顶端的封口端11，以及位于筒身本体13和封口端11之间的过渡段12；其中，筒身本体13的厚度较薄，称为薄壁段，薄壁段的厚度t1小于原材料厚度；封口端11的厚度较厚，称为厚壁段，厚壁段保留原材料厚度，即厚壁段的厚度t2大于或等于材料厚度。因差厚钢壳有薄壁段和厚壁段，并由多工位拉伸工艺决定，客观存在薄壁段和厚壁段之间的接痕，即差厚刻线17，该差厚刻线17位于过渡段12。电池生产方法为：先向差厚钢壳内填料，然后对钢壳实施轧线，形成轧线槽15，轧线位置在上述过渡段12处，如图2所示，再装入负极封口、集电组合体，最后封口卷边，如图2中箭头所示方向进行卷边。在封口卷边过程中，会产生较大的轴向压力，差厚钢壳自身会减弱钢壳的抗压能力，差厚刻线17所在位置，即过渡段12是整个差厚钢壳最薄弱的位置，轧线位为易变形...
【技术保护点】
1.一种电池用差厚钢壳，包括：筒身本体，封口端，位于所述筒身本体和所述封口端之间的过渡段；其特征在于，所述电池用差厚钢壳的差厚刻线位于所述筒身本体。/n
【技术特征摘要】 【专利技术属性】
1.一种电池用差厚钢壳，包括：筒身本体，封口端，位于所述筒身本体和所述封口端之间的过渡段；其特征在于，所述电池用差厚钢壳的差厚刻线位于所述筒身本体。
2.根据权利要求1所述的电池用差厚钢壳，其特征在于，所述差厚刻线距所述过渡段的距离为1.5mm-4.0mm。
技术研发人员：忻琳浩，周时健，何俊文，
申请(专利权)人：宁波光华电池有限公司，
类型：新型
国别省市：浙江;33
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