The invention discloses an extremely thin cylindrical lithium battery cap without a top cover, which in turn includes orifice plate, insulating ring, explosion-proof sheet and sealing ring. A through hole is arranged in the middle of the insulating ring, and the explosion-proof sheet is provided with a convex platform. The convex platform is welded with the orifice plate through the through hole arranged on the insulating ring. Through the structural change, the overall thickness of the original cap was reduced from 3.45 mm to 1.90 mm, 45% thin. The effective space of 1.55 mm was reserved for the core, and the capacity space of the battery with the same unit volume was increased. Compared with the existing technology, in terms of production process, the number of parts is reduced. The original design of the top cover has five parts, and now there are four parts without the top cover. This reduces the assembly process accordingly. There are two welding processes in the existing technology, namely, the welding of the top cover, the explosion-proof sheet and the orifice plate. The application of the invention only needs one welding, that is, the explosion-proof sheet and the orifice plate. Welding of orifice plate.
【技术实现步骤摘要】
一种无顶盖的极薄型圆柱锂电池盖帽
本专利技术涉及动力锂电池领域,尤其涉及一种无顶盖的极薄型圆柱锂电池盖帽。
技术介绍
锂电池盖帽,又叫安全阀,是动力锂电池的安全组件,其结构包括顶盖、孔板、绝缘圈、密封圈和防爆片等,如专利申请20171065000616一种动力锂电池防爆盖帽组件、2018101875827-动力锂电池盖帽及2018101875579-一种锂电池盖帽组件等专利申请,无论结构如何改变,但其包含的基本结构组件是相同的前述结构组件。上述传统的锂电池盖帽存在如下弊端:(1)整体较厚,占用钢壳储能容量;(2)工艺焊接次数为两次,易焊穿,尤其是防爆片与顶盖焊接时,采用材料不同,热系数差异,导致存在“焊穿”“炸火”等现象,工艺难度大。因此,需要设计更好的锂电池盖帽。
技术实现思路
本专利技术涉及一种无顶盖的极薄型圆柱锂电池盖帽,解决了上述问题,通过结构改变,使得原来的盖帽整体厚度从3.45mm降到1.90mm,薄了45%.,为电芯多预留1.55mm的有效空间,为同等单位体积的电池增加容量空间。为达此目的,本专利技术采用以下技术方案:一种无顶盖的极薄型圆柱锂电池盖帽,其 ...
【技术保护点】
1.一种无顶盖的极薄型圆柱锂电池盖帽,其特征在于,依次包括孔板(1)、绝缘圈(2)、防爆片(3)及密封圈(4),所述绝缘圈(2)的中间设有一通孔(21),所述防爆片(3)设有一凸台(31),所述凸台(31)通过所述绝缘圈(2)上所设置的所述通孔(21)与所述孔板(1)相焊接。
【技术特征摘要】
1.一种无顶盖的极薄型圆柱锂电池盖帽,其特征在于,依次包括孔板(1)、绝缘圈(2)、防爆片(3)及密封圈(4),所述绝缘圈(2)的中间设有一通孔(21),所述防爆片(3)设有一凸台(31),所述凸台(31)通过所述绝缘圈(2)上所设置的所述通孔(21)与所述孔板(1)相焊接。2.如权利要求1所述的一种无顶盖的极薄型圆柱锂电池盖帽,其特征在于,所述防爆片(3)上设有用于将所述绝缘圈(2)卡扣于所述防爆片(3)上圆形凸环(32),所述凸环(32)的半径与所述绝缘圈(2)的半径相匹配。3.如权利要求2所述的一种无顶盖的极薄型圆柱锂电池盖帽,其特征在于,所述凸环(32)具有向外侧的角度,该角度设为30°~75°。4.如权利要求2所述的一种无顶盖的极薄型圆柱锂电池盖帽,其特征在于,所述孔板(1)上设有圆形的焊接部(12),该焊接...
【专利技术属性】
技术研发人员:李晓平,刘勇,陈绍辉,
申请(专利权)人:江苏镭腾能源科技有限公司,
类型:发明
国别省市:江苏,32
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