CN2561104Y

CN2561104Y - disposable cylindrical zinc-air battery

Info

Publication number: CN2561104Y
Application number: CN 01280439
Authority: CN
Inventors: 朱刚; 李升宪; 钱敦勇; 刘军平; 曹文云; 王志安; 胡林木
Original assignee: Baowang Battery Co ltd Ningbo; Wuhan University WHU
Current assignee: Baowang Battery Co ltd Ningbo; Wuhan University WHU
Priority date: 2001-12-29
Filing date: 2001-12-29
Publication date: 2003-07-16
Anticipated expiration: 2011-12-29

Abstract

The utility model belongs to the technical field of chemical power supply, especially a disposable cylindrical zinc-air battery. The air-permeable zinc-plated anode comprises a metal shell (1) with a vent hole (11), a porous metal conductor (2), an air anode (3), a diaphragm (4) and a zinc cathode (5) from outside to inside in sequence; the battery bottom is sealed by negative pole end sealing member (7), and metal negative pole end (6) cover outside negative pole end sealing member (7), and negative pole mass flow body (61) pass negative pole end sealing member (7) and stretch into zinc negative pole (5) it has two or more concave ditches (71) to distribute in negative pole end sealing member (7) periphery. The battery has strong ventilation capacity, can provide the air (oxygen) amount required by the battery under the heavy current working condition, so the battery can work under the heavy current condition and has wide application range.

Description

Disposable cylindrical zinc-air battery

Technical Field

The utility model belongs to the technical field of chemical power supply, especially a disposable cylindrical zinc-air battery.

Background

The existing disposable batteries are always in the zinc-manganese battery stage. The battery has large consumption, poor performance and serious pollution; the alkaline manganese battery solves the pollution problem of the zinc-manganese battery to a certain extent, and the performance and the quality are improved to a certain extent, but the problem is not solved fundamentally. As a zinc-air battery, the zinc-air battery has the advantages of high specific energy (3-5 times of the capacity of an alkaline manganese battery with the same specification), stable working voltage, rich raw materials, no pollution and the like which cannot be compared with a common battery, and the zinc-air battery is widely concerned, and a button type square zinc-air battery and a large-volume square zinc-air battery are already commercialized, while a cylindrical zinc-air battery is not commercialized due to structural particularity and complexity of the traditional manufacturing process, is not suitable for industrial production and is not commercialized so far. The utility model discloses a patent No. 00229265.3's utility model discloses a positive pole of cylinder type zinc-air battery, it is the drum by conductive carbon black and thermoplastic manufacturing, the inner wall spraying of drum has a layer of catalyst, it has one deck non-woven fabrics diaphragm to hug closely the drum inner wall, pack metal calamine cream in the drum as the negative pole when using, the drum opening is sealed with moulding plastics and sealing the fusion welding, it has the negative pole cap to inlay in the sealing to mould plastics, it has the copper needle to pass to mould plastics to seal to insert in the calamine cream on the negative pole cap, the drum endotheca that has assembled is in battery case, it has conductive medium to fill between the outer wall of drum and the inner wall of battery case, there is the positive limit on battery case top, its peripheral division has a plurality of air apertures. The anode is a cylinder made of conductive plastic and provided with an opening at one end, the inner wall of the cylinder is sprayed with a layer of catalyst, a non-woven fabric diaphragm is sleeved in the cylinder, and the outer wall of the opening end of the cylinder is provided with an outer convex edge. In the utility model, the air (oxygen) required by the battery reaction is provided through the vent hole on the battery shell. The battery has the defects of poor ventilation capability and incapability of providing the air (oxygen) required by the battery under the condition of large-current working, so that the battery can only work under the condition of small current and has a small application range.

Disclosure of Invention

The utility model aims to solve the technical problem that a disposable cylindrical zinc-air battery is provided, its ventilation capability is strong, can provide the required air (oxygen) volume of battery under the heavy current working condition, so the battery can work under the heavy current condition, and application scope is big.

The utility model provides a technical scheme that above-mentioned technical problem adopted does: a disposable cylindrical zinc-air battery comprises a metal shell with a vent hole, a porous metal conductor, an air anode, a diaphragm and a zinc cathode in sequence from outside to inside; the bottom of the battery is sealed by a negative end sealing piece, the bottom of the metal negative electrode covers the outside of the negative end sealing piece, a negative current collector penetrates through the negative end sealing piece 7 and extends into the zinc negative electrode, and more than two grooves are uniformly distributed on the periphery of the negative end sealing piece.

The number of grooves may be two to eight.

Preferably, the number of said grooves is four.

The depth of the groove may be 0.2 to 1.5mm.

The groove depth may be 1mm.

The shape of the groove can be square, semicircular or triangular.

Compared with the prior art, the utility model has the advantages of solved the pollution problem of zinc-manganese cell, performance and quality also have very big improvement, especially the utility model discloses it is strong to have its air permeability of ditch more than two at the peripheral evenly distributed of negative pole end sealing member, can provide the required air (oxygen) volume of battery under heavy current operational aspect, so the battery can work under the heavy current condition, and application scope is big.

Drawings

FIG. 1 is a structural view of an integral cylindrical zinc-air cell;

fig. 2 is a cross-sectional view of the negative plastic seal;

fig. 3 is a top view of fig. 2.

Detailed Description

The present invention will be described in further detail with reference to the following embodiments.

A disposable cylindrical zinc-air battery as shown in fig. 1-3, which comprises a metal shell 1 with a vent hole 11, a porous metal conductor 2, an air anode 3, a diaphragm 4 and a zinc cathode 5 in sequence from outside to inside; the bottom of the battery is sealed by a negative end sealing piece 7, the metal negative bottom 6 covers the outside of the negative end sealing piece 7, a negative current collector 61 penetrates through the negative end sealing piece 7 and extends into the zinc negative electrode 5, and more than two grooves 71 are uniformly distributed on the periphery of the negative end sealing piece 7.

In fig. 1, 1 is a metal shell, the metal shell 1 of the battery is cylindrical, the axis of the metal shell protrudes out of the anode head 12, four vent holes 11 are uniformly distributed around the anode head 12, the diameter of the vent holes is 0.9mm, and the number of the vent holes 11 can be selected from 2 to 8 according to the specification requirement of the product: the size of the vent hole 11 can be selected between 0.2 mm and 1.5mm. The vent hole 11 is used for allowing external air to enter the interior of the battery to react; a metal conductor 2 (which can be foam nickel, foam copper or metal mesh) is arranged between the metal shell 1 and the air anode 3, and the metal conductor has the functions of increasing the current collecting area of the anode and improving the performance of the battery; the air anode 3 is a straight cylinder which is hot-pressed by anode materials after being mixed and has one end with an arc bottom and one open end, and the inner wall of the straight cylinder is sprayed or impregnated with a catalytic thin layer: the diaphragm 4 is arranged on the inner wall of the air anode 3 and mainly plays a role in isolating the anode and the cathode; the diaphragm 4 is provided with a zinc cathode 5; a negative seal 7 is provided at the negative end of the cell and is constructed as shown in figure 2. The center of the metal negative electrode bottom 6 is spot welded with a negative electrode current collector 61 (a copper needle plated with tin, lead and indium), the metal negative electrode bottom 6 is injected with a plastic sealing element 7, the structure of the plastic sealing element is shown in figure 3, 4 grooves 71 with the depth of 1mm are uniformly distributed on the periphery of the plastic sealing element, the number of the grooves can be selected from two to eight according to the specification requirements of products, the depth of the grooves can be selected from 0.2-1.5 mm, the shapes of the grooves 71 can be square, semicircular or triangular, and the like, specifically shown in figures 2-1,2-2,2-3 and figures 3-1,3-2,3-3, the battery negative electrode sealing element 7 with the grooves and an air vent 9 on a battery metal shell 1 form an air circulation channel, so that the air convection speed is increased, and the improvement of the battery performance is facilitated. Meanwhile, the vent holes 11 are formed at the two ends of the battery, so that the battery is convenient to package. The seal is injection molded from one of the polymer plastics. The periphery of the negative end plastic sealing piece 7 is coated with a layer of sealant and is inserted into the zinc negative electrode 5, so that the edge of the opening end of the air anode 3 is in close contact with the negative end plastic sealing piece 7, the heat welding is carried out for sealing, the sealing performance of the battery is ensured, and the phenomenon of alkali leakage in a creeping way is avoided. The metal shell 1 and the cathode end plastic sealing element 7 are fixed by mechanical edge buckling.

Claims

1. A disposable cylindrical zinc-air battery comprises a metal shell (1) with a vent hole (11), a porous metal conductor (2), an air anode (3), a diaphragm (4) and a zinc cathode (5) in sequence from outside to inside; the battery bottom is sealed by negative pole end sealing member (7), and metal negative pole end (6) cover outside negative pole end sealing member (7), and negative pole mass flow body (61) pass negative pole end sealing member (7) and stretch into zinc negative pole (5), its characterized in that: more than two grooves (71) are distributed on the periphery of the negative end sealing element (7).

2. A disposable cylindrical zinc-air cell according to claim 1, wherein: two to eight of the grooves (71) are provided.

3. A disposable cylindrical zinc-air cell according to claim 2, wherein: four of the grooves (71).

4. A disposable cylindrical zinc-air cell according to claim 1, wherein: the depth of the groove (71) is 0.2-1.5 mm.

5. A disposable cylindrical zinc air cell according to claim 4 wherein: the depth of the groove (71) is 1mm.

6. A disposable cylindrical zinc-air cell according to any one of claims 1 to 5, wherein: the shape of the groove (71) can be square, semicircular or triangular.