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Combined covering cap in use for columniform secondary battery of zinc-nickel

A secondary battery, cylindrical technology, applied in the direction of battery pack parts, circuits, electrical components, etc., can solve the problem of battery internal pressure rise, achieve the effect of preventing internal pressure rise, novel structure, and scientific composition

Inactive Publication Date: 2006-12-06
山东国金汽车工程技术有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, as the storage time of the battery goes on, the alkali creep phenomenon existing inside the battery-that is, the alkaline electrolyte infiltrates and expands along the surface of the copper current collector plated with lead, tin or lead-tin alloy to the bottom cover of the combined cap and even The phenomenon of wetting the entire surface of the bottom cover makes the zinc of the electrode connect with the nickel on the surface of the bottom cover through the alkaline electrolyte, the corrosion of the primary battery is still inevitable, hydrogen will still be precipitated on the surface of the nickel, and the internal pressure of the battery is caused the problem still exists

Method used

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  • Combined covering cap in use for columniform secondary battery of zinc-nickel

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Experimental program
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Effect test

specific Embodiment approach 1

[0023] The first combination cap for 2 / 3AA cylindrical zinc-nickel secondary battery is composed of end cap 1, bottom cover 2 and explosion-proof parts 3 arranged between the end cap and the bottom cover, and the bottom cover 2 is welded with the zinc The current collector 4 of the negative electrode is connected by welding.

[0024] A lead-tin alloy layer 5 with a thickness of 5 microns and a high hydrogen evolution overpotential is electroplated and deposited on the surface of the bottom cover 2 .

[0025] The surface of the bottom cover 2 and the surface of the current collector 5 connected thereto are coated with an anti-corrosion paint layer, which is not shown in the drawings.

[0026] The anti-corrosion coating layer is a phenolic-acetal polymer bonding layer made of a JSF-2 phenolic-polyvinyl butyral adhesive.

specific Embodiment approach 2

[0027] The second combination cap for 2 / 3AA cylindrical zinc-nickel secondary battery has the same composition and structure as the first embodiment.

[0028] The anti-corrosion paint layer coated on the surface of the bottom cover 2 and the surface of the current collector 5 connected thereto is a phenolic-nitrile polymer bonding layer made of J-15 phenolic-nitrile rubber adhesive.

specific Embodiment approach 3

[0029] The third combination cap for 2 / 3AA cylindrical zinc-nickel secondary battery has the same composition and structure as the first embodiment.

[0030] The surface of the bottom cover 2 and the anti-corrosion paint layer coated on the surface of the current collector 5 connected to it are epoxy-nitrile polymer adhesives made of J-23 nitrile rubber modified epoxy adhesive. layer.

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Abstract

The disclosed composite covering cap is composed of end cap, bottom cover, and explosion prevention piece. Being connected to afflux body of zinc negative pole, the bottom cover is made from metal or alloy, or which is setup on surface of the bottom cover, with high over potential for separating out hydrogen. Corrosion preventive paint coat is coated on surface of the bottom cover, and surface of the connected afflux body. Being selected from metlbond-acetal type polymer, epoxy-butyronitrile type polymer, or epoxy-nylon polymer etc, the corrosion preventive paint coat possesses characteristics: good affinity, cohesiveness to surface of metal so as to contact surface of metal fully; not checking property of resisting dipping in alkali for long time. Thus, the bottom cover can prevent corrosion from appearing on surfaces of bottom cover or afflux body. The invention possesses marked effect on accumulation of hydrogen, and against step up internal pressure.

Description

technical field [0001] The invention relates to an end cover of an inactive part of a secondary battery for directly converting chemical energy into electrical energy, in particular to a combined cover for a cylindrical zinc-nickel secondary battery. Background technique [0002] Zinc-nickel secondary battery has the superior performance of zinc-silver battery with extremely high capacity of zinc negative electrode and nickel-cadmium battery with long service life. At present, it has been used as the power supply of portable electric tools, as well as the starting lighting and ignition power supply of passenger cars and trucks. And it is expected to be used as a power source for electric vehicles. The development of long-life, high-sealing zinc-nickel secondary batteries will promote the development of electric vehicles and bring prosperity and competition to the battery market. As a combination cap of zinc-nickel secondary battery sealing assembly, it is generally composed...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M2/04H01M50/152
CPCY02E60/12Y02E60/10
Inventor 朱志坚
Owner 山东国金汽车工程技术有限公司
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