The utility model discloses a mercury free button battery comprises a battery shell, anode, cathode, electrolyte and sealing ring, wherein the battery shell is composed of a cathode cover and an anode shell structure, the negative edge cover provided with flanging part, which is characterized in that the cathode cover by the inner cover and the outer cover. Which part of the cathode cover flange is located in the inner edge of the cover surface is electroplated on the anti-corrosion coating, cover on the surface of the Ni coating on the outer wall of the shape, the shape of the inner wall and the outer cover and the inner cover is matched with the outer cover superimposed on the inner cover, the outer wall. The inner wall of the outer cover and the inner cover, and the outer cover is clamped on the inner edge of the flange part. The utility model has the advantages of long storage life and high passing rate, and the preparation method of the negative electrode cap is simple, the efficiency is high and the cost is low.
【技术实现步骤摘要】
本技术涉及一种无汞钮扣电池。
技术介绍
钮扣型碱性锌-二氧化锰电池简称钮扣电池,它是缪尔·鲁本在1942年实用新型的,至今,钮扣电池的机械结构仍未发生太大的变化。如图1所示,常规的钮扣电池包括电池外壳、负极4、正极5、密封圈3和电解液,其中,电池外壳由负极盖1和正极壳体2构成,密封圈3设置在负极盖1和正极壳体2之间,负极盖1的边缘设置有翻边部11,该翻边部与密封圈3过盈配合,使负极盖1紧固在正极壳体2上,负极4、正极5和电解液设置在电池外壳内。钮扣电池的负极原料中含锌,锌易腐蚀作为钮扣电池负极盖基材的金属而析出氢气体,使钮扣电池气胀、漏液甚至爆炸。以往,常在负极中添加汞来减少锌对负极盖基材的腐蚀,但基于环保原因,该方法已渐渐被禁止使用,无汞钮扣电池成为钮扣电池发展的主流。无汞钮扣电池受限于体积较小而无法设置容纳氢气的气室,而其负极盖又直接罩覆在负极上,使负极盖的内壁与含锌负极相接触,因此,无汞钮扣电池常通过在负极盖内壁电镀铟、铜锡合金或者锌锡合金等镀层 ...
【技术保护点】
一种无汞钮扣电池,包括电池外壳、负极(4)、正极(5)、密封圈(3)和电解液,其中电池外壳由负极盖(1)和正极壳体(2)构成,所述负极盖(1)的边缘设置有翻边部,其特征在于:所述的负极盖(1)由内盖(1a)和外盖(1c)组成,其中,所述负极盖(1)的翻边部(1b)位于内盖(1a)的边缘,在内盖(1a)表面上电镀有防腐蚀镀层(1d),在外盖(1c)表面上电镀有镍镀层(1e),且所述外盖(1c)的内壁形状与所述内盖(1a)的外壁形状相适配,所述外盖(1c)叠合在内盖(1a)外,使外盖(1c)的内壁与内盖(1a)的外壁贴合,并且外盖(1c)的边缘夹装在所述内盖(1a)的翻边部(1b)中。
【技术特征摘要】
2013.02.07 CN 201320071184.11.一种无汞钮扣电池,包括电池外壳、负极(4)、正极(5)、密封圈(3)
和电解液,其中电池外壳由负极盖(1)和正极壳体(2)构成,所述负极盖(1)
的边缘设置有翻边部,其特征在于:所述的负极盖(1)由内盖(1a)和外盖(1c)
组成,其中,所述负极盖(1)的翻边部(1b)位于内盖(1a)的边缘,在内盖
(1a)表面上电镀有防腐蚀镀层(1d),在外盖(1c)表面上电镀有镍镀层(1e),
且所述外盖(1c)...
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