Novel method for sealing cylindrical zinc-air battery

A zinc-air battery and air electrode technology, which is applied to fuel cell half-cells and primary battery half-cells, battery electrodes, circuits, etc., to achieve stable working voltage, excellent strength, and excellent sealing.

Inactive Publication Date: 2010-12-08
BEIJING CHANGLI UNION ENERGY TECH CO
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  • Abstract
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  • Application Information

AI Technical Summary

Problems solved by technology

[0007] The purpose of the present invention is to provide a new type of sealing method for cylindrical zinc-air batteries, which adopts the method of heating and molding to directly shape the air electrodes of cylindrical batteries, and does not use glue at all, which can completely solve the problem of cylindrical zinc-air batteries. battery sealing problem

Method used

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  • Novel method for sealing cylindrical zinc-air battery
  • Novel method for sealing cylindrical zinc-air battery
  • Novel method for sealing cylindrical zinc-air battery

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preparation example Construction

[0032] 3. Preparation of the inner catalytic membrane of the air electrode

[0033] The catalytic layer is prepared according to the following ratio: the mixed material of the catalyst is configured by weight: polytetrafluoroethylene: 10-25%, acetylene black or carbon black: 45-75%, catalyst: 10-35%.

[0034] Described catalyst can be: MnO 2 , KMnO 4 , MnSO 4 , SnO 2 , Fe 2 o 3 ,Co 3 o 4 , Co, CoO, Fe, Pt and Pd, etc.

[0035] Add 2 times the weight of the aqueous solution to the above mixed material, fully mix and stir to agglomerate into a slurry, and then dry out the water in it, so that the soluble catalyst is dispersed and precipitated on the surface of the carbon black; add 3 times the organic Solvent (such as alcohol), after repeated rolling and fibrosis, is finally pressed to a specified thickness (0.05-0.2mm), which is used as a pre-embedded catalytic membrane.

[0036] 4. Molding and preparation of air electrode

[0037] ① Bond the catalytic membrane into a...

Embodiment 1

[0047] 1. First, prefabricate a stainless steel battery case with air holes.

[0048] 2. Add adhesive, conductive agent and remodeling material according to the weight ratio of 10%: 60%: 30%, and prepare waterproof powder for use after heat sealing and crushing; the adhesive is low-pressure polyethylene; The modified material is OP-10; the conductive agent is acetylene black.

[0049] 3. According to PTFE 10%; acetylene black 75%, MnO 2 A mixture of 15% by weight of the catalyst; add 2 times the weight of the aqueous solution to the above mixture, fully mix and stir to form a slurry, and then dry out the water in it, so that the soluble catalyst is dispersed and precipitated on the surface of the carbon black; Add 3 times alcohol to the final mixture, after repeated rolling and fibrosis, it is pressed to a thickness of 0.05mm, and it is used as a pre-embedded catalytic membrane.

[0050] 4. Bond the catalytic membrane into a cylindrical shape, pre-embed it in the hot-pressin...

Embodiment 2

[0056] Concrete method is the same as embodiment 1, and difference is:

[0057] In step 2, according to the weight ratio of 35:40:25, adhesive, conductive agent and remodeling material are added, and after heat sealing and crushing, waterproof powder is prepared for use; the adhesive is polytetrafluoroethylene; the The modified material described above is OP-10; the conductive agent described is acetylene black.

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Abstract

The invention discloses a method for sealing a cylindrical zinc-air battery, which comprises the following steps of: prefabricating a stainless steel battery case with air holes, adding an adhesive, a modified material and a conductive agent according to a weight ratio, performing heat seal and crushing to prepare modified low-pressure polyethylene or polytetrafluoroethylene waterproof powder; preparing a catalyst mixed material according to a weight proportion; adding aqueous solution into the mixed material, mixing and aggregating to form slurry, and drying; adding an organic solvent into the dried mixture, performing repeated rolling fibration, and finally rolling into the specific thickness; preparing a catalytic membrane, and preparing the catalytic membrane into an air electrode in an embedded air electrode molding mold; and dip-coating an alkaline resisting glue line on the edge of the air electrode, drying to form a thin sealing film, and packaging into the stainless steel battery case. By adopting a heating and mould pressing mode, the air electrode of the cylindrical battery is directly molded and produced, a gluing mode is not used at all, and the sealing problem of the cylindrical zinc-air battery can be radically solved.

Description

technical field [0001] The invention relates to battery manufacturing technology, in particular to a novel sealing method for a cylindrical zinc-air battery. Background technique [0002] Zinc-air batteries have the advantages of large capacity, high specific energy, stable working voltage, safe use, low price, and environmental friendliness, and have always attracted the attention of research institutes and enterprises at home and abroad. With the development of modern manufacturing technology, its potential is gradually revealed, and its application is gradually expanded. It not only continues to be widely used in traditional fields such as portable communication machines, medical devices, river navigation lights, electronic watches, and calculators. Develop power supplies suitable for a variety of advanced portable electronic products such as mobile phones and notebook computers, as well as power supplies for electric vehicles. [0003] The electrochemical principle of t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M12/06H01M4/88
CPCY02E60/50Y02E60/128
Inventor 张树雄周利民周跃民
Owner BEIJING CHANGLI UNION ENERGY TECH CO
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