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Cap and battery with cap

A cap and battery technology, applied in battery pack components, circuits, electrical components, etc., can solve problems such as cap corrosion and blackening, and achieve the effect of solving corrosion and blackening and reducing battery safety risks.

Pending Publication Date: 2020-11-10
EVE ENERGY CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Aiming at the current problem of cap corrosion and blackening, the present invention provides a cap, its preparation method and a battery with the cap, which can solve the problem of cap corrosion and blackening and battery safety risks

Method used

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  • Cap and battery with cap
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  • Cap and battery with cap

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0139] In a specific embodiment, the present invention provides a figure 1 The shown cap 1, the cap 1 includes a cap body, the cap body includes a top plate 11 and a first surrounding wall 12 that is arranged on one side of the top plate 11, the top plate 11 and the first surrounding wall 12 form The inner side of the space or the inner side of the top plate 11 is provided with an M layer 23, a transition layer 22 and an anti-corrosion layer 21 in sequence. The base material of the cap body is 316L steel, the M layer 23 is a chromium layer, and the transition layer 22 is Cr / The Al transition layer (specifically, a chrome-aluminum co-plating layer), and the anti-corrosion layer 21 is an aluminum film.

[0140] The thickness of the chromium layer is ≦50 μm, preferably 0.001 μm-20 μm.

[0141] The thickness of the Cr / Al transition layer is ≤50 μm, preferably 0.001 μm-20 μm.

[0142] The thickness of the aluminum film is ≤100 μm, preferably 1 μm-20 μm.

[0143] This specific e...

Embodiment 2

[0151] The difference from Example 1 is that an aluminum film is directly provided inside the space formed by the top plate 11 and the first surrounding wall 12 or inside the top plate 11 without containing a chromium layer and a Cr / Al transition layer.

Embodiment 3

[0153] The difference from Example 1 is that a chromium layer and an aluminum film are sequentially provided inside the space formed by the top plate 11 and the first surrounding wall 12 or inside the top plate 11 , without the Cr / Al transition layer.

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Abstract

The invention discloses a cap and a battery with the cap. An anti-corrosion layer is arranged at at least one side of a battery cap body. According to the battery cap, the anti-corrosion layer is arranged at at least one side of the cap body, so that the problem of blackening of the cap due to corrosion of the cap can be solved, and the battery safety risk is reduced.

Description

technical field [0001] The invention belongs to the technical field of new energy, and relates to a cap and a battery with the cap. Background technique [0002] The positive terminal caps of batteries currently on the market are generally made of stainless steel, such as 304, 316, and 316L; the material of the positive tab inside the battery is generally Al, and are electrically connected by ultrasonic welding, resistance welding, etc. However, this structural product generally has the problem of corrosion and blackening inside the cap. And in the process of use or storage, with the effect of temperature and time, the corrosion of the cap will intensify, and the oxide produced by the corrosion of the cap will fall into the battery cell, which will also cause an internal short circuit, causing the battery to fail or pose a safety risk. Contents of the invention [0003] Aiming at the problem of corrosion and blackening of the current cap, the present invention provides a ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M2/04H01M2/26H01M2/32H01M50/571
Inventor 李吉栋徐悦斌何巍李碧梅张梦菲祝媛刘建华刘金成
Owner EVE ENERGY CO LTD