CN2410744Y

CN2410744Y - Positive pole of cylinder zinc-air battery

Info

Publication number: CN2410744Y
Application number: CN00229265U
Authority: CN
Inventors: 杨汉西; 曹余良; 李升宪; 周新松; 毛湘林
Original assignee: Wuhan Sky Power LLC; Wuhan University WHU
Current assignee: Wuhan Sky Power LLC; Wuhan University WHU
Priority date: 2000-02-22
Filing date: 2000-02-22
Publication date: 2000-12-13
Anticipated expiration: 2010-02-22

Abstract

The utility model relates to an anode of a cylindrical zinc-air battery, which is a cylinder made from conductive carbon black and thermoplastic plastics; a layer of catalyst is sprayed on the inner wall of the cylinder; a layer of non-woven fabric diaphragm is appressed with the inner wall of the cylinder; when in use, metallic calamine cream is served as a cathode to be filled in the cylinder; an opening of the cylinder is sealed in a fusion welding mode by an injection closure in which a cathode cap is embedded; the cathode cap is connected with a copper needle which passes through the injection closure to be inserted into the calamine cream. An assembled cylinder is internally sheathed in a battery case; a conducting medium is filled between the outer wall of the cylinder and the inner wall of the battery case; the top end of the battery case is provided with an anode point; the periphery of the anode point is provided with a plurality of small air holes. The utility model has the advantages of easy fabrication, low cost and safety, and the utility model can be served as a replacing product of primary batteries with medium and low power.

Description

The positive pole of a kind of garden column type zinc-air cell

The utility model relates to the positive pole of a kind of garden column type zinc-air cell.

Air cell is to utilize airborne oxygen to produce the device of electric energy as positive pole.Because the electrochemistry capacitance of metallic zinc is high and cheap, therefore zinc had the advantage that energy density is high with the cost of material is low as the zinc-air cell of the negative pole made of air cell.Existing in the market small-sized button and large-scale zinc air prismatic, and the cylindrical zinc air cell does not form commodity so far yet.Research in the past specially this has been done a large amount of exploration work [as Wu Zhiyuan: ZL94206870, X (940320); Yang Hanxi etc.: ZL97241293, X], but, causing the manufacturing process of air electrode various because the mode that rolls film forming is all adopted in the manufacturing of its positive pole, raw material is valuable, is difficult to form industrialized mode production.

The purpose of this utility model is the problem that solves the complicated and material cost of the production that exists in the above-mentioned technology, proposes a kind of reliable cylinder positive pole, is used for suitability for industrialized production high-energy-density, safe and reliable, cheap zinc-air cell.

For achieving the above object, the utility model adopts following technical scheme: the cylinder of the end opening that the just very conductive carbon black of air cell and thermoplastics are made, the inner-wall spraying of cylinder one deck catalyst, suit nonwoven fabrics barrier film in the cylinder, this barrier film carries modulation such as metal oxide and polymer solution such as polyvinyl acetaldehyde, tetrafluoroethene-hexafluoroethylene copolymer, vinylidene fluoride copolymers, methymethacrylate-BS by common charcoal and forms, and the outer wall of cylinder opening end has outer flange.To fill in cylinder in the negative pole of calamine cream as air cell, then the opening socket injection moulding of cylinder is sealed and the melting welding sealing in use; Be embedded with the negative pole cap during injection moulding is sealed, pass injection moulding from the center of negative pole cap and seal and be connected with the copper pin, the copper pin inwardly inserts in the calamine cream; To be placed in this cylinder among the battery case, make the outer flange of cylinder and the inwall tight connecting of battery case, and filled conductive medium such as nickel foam, foam copper or metal clips etc. in the gap between the outer wall of the inwall of battery case and anodal cylinder, bound edge is fixed again; One end opening of battery case, the other end has positive limit, and its periphery has some air apertures.

Compared with prior art, the utility model has following main feature:

1. should adopt more cheap raw material by positive pole, product cost is significantly reduced.

2. this electrode adopts one-time heating compression molding and spraying Catalytic Layer technology, and the electrode shape size is accurately controlled, stable and reliable for performance, mechanical strength significantly strengthens, and technical process is simplified low cost of manufacture.

3. in use available ultrasonic fusion welding method sealing makes it to have prevented electric liquid leakage phenomenon in conjunction with firmly, has improved the security reliability of product.

Describe the utility model in detail below in conjunction with accompanying drawing.

Fig. 1 is the generalized section of this positive pole when using in zinc-air cell.

Fig. 2 is this anodal generalized section.

Fig. 3 is the generalized section with this anodal matching used negative pole external member.

Among Fig. 1,1 is the positive pole of air cell, and 2 is the barrier film pad, and 3 is the outer flange of cylinder opening end, and 4 is calamine cream, and 5 is conducting medium, and 6 seal for injection moulding, and 7 is the negative pole cap, and 8 is the copper pin, and 9 is battery case, and 10 is positive limit, and 11 is the air aperture.The cylinder 1 of the end opening that the just very conductive carbon black of air cell and thermoplastics are made, the inner-wall spraying of cylinder 1 one deck catalyst, and suit nonwoven fabrics barrier film 2, this barrier film carries modulation such as metal oxide and polymer solution such as polyvinyl acetaldehyde, tetrafluoroethene-hexafluoroethylene copolymer, vinylidene fluoride copolymers, methymethacrylate-BS by common charcoal and forms, and the outer wall of cylinder 1 openend has outer flange 3; The negative pole of air cell is a calamine cream 4, fills in it in cylinder 1; The openend of cylinder is socketed with injection moulding and seals 6, injection moulding seal 6 with cylinder 1 usefulness melting welding sealing, injection moulding is sealed and is embedded with negative pole cap 7 in 6, passes injection moulding from the center of negative pole cap 7 and seals 6 and be connected with copper pin 8, copper pin 8 inwardly inserts in the calamine creams 4; Be placed in the cylinder 1 among the battery case 9, the outer flange 3 of cylinder and the inwall tight connecting of battery case 9, leave the gap between the outer wall of the inwall of battery case 9 and cylinder 1, be filled with conducting medium 5 in the gap as nickel foam, foam copper or metal clips etc., and bound edge is fixed; The other end of battery case has positive limit 10, and its periphery has some air apertures 11.

An end opening of shown in Figure 2 anodal 1, an end are circular base, and flange 3 outside the outer wall of openend has.

Negative pole external member shown in Figure 3 is to be welded with copper pin 8 in the centre of negative pole cap 7, and then on negative pole cap 7 and copper pin 8 plastic closures 6 of injection moulding respective shapes.

Claims

1. the positive pole of a cylindrical zinc air cell, it is characterized in that described positive pole is the cylinder of the end opening that is made by conductive plastics, the inner-wall spraying of cylinder one deck catalyst, suit nonwoven fabrics barrier film in the cylinder, the outer wall of cylinder opening end has outer flange.

2. according to the positive pole of the described air cell of claim 1, it is characterized in that described conductive plastics is the high dispersive mixture of conductive carbon black and hydrophobicity plastics, the hydrophobicity plastics can be one or more the mixtures in the macromolecular materials such as s-B-S copolymer, methymethacrylate-BS, TPO, polystyrene type, polyvinyl-fluoride.

3. according to the positive pole of the described air cell of claim 1, it is characterized in that described catalyst is the solution that charcoal carries metal oxide and alkaline-resisting hydrophobic polymer, the polymer of employing is a kind of in polyvinyl acetaldehyde, tetrafluoroethene-hexafluoroethylene copolymer, vinylidene fluoride copolymers, the methymethacrylate-BS.