JPS5949164A - Air cell - Google Patents

Abstract

PURPOSE:To increase the vertical strength of a cylindrical or square columned air cell by connecting a sealing plate and a gasket, which are used for sealing the upper and the lower sections of a cylindrical or square columned gas electrode, by means of a current-collecting body of a negative electrode. CONSTITUTION:After a cylindrical gas electrode 1 is formed by the use of a thin-film- like member prepared by unifying a water repellent base body, a catalyst layer and a current collecting body, a lead 2 is welded to the top end of the current collecting body, and the other end of the lead 2 is welded to a positive terminal plate 8. Next, the top section of the gas electrode 1 is buried in a battery lid 3 to form a cup-like body. Next, a separator 5 is installed inside the cup-like body before it is packed with a negative mixture prepared by kneading alkaline electrolyte with a gelling agent, then a current collecting body 7 connected to a negative electrode terminal 9 is installed in such a manner that the body 7 contacts the battery lid 3 through the separator 5. After that, the opening of the cup-like body is sealed with a gasket 4, the peripheries of the electrode terminals are covered with insulating sleeves 11 and 12, and the air cell is crimped with a metallic can 10 having air holes 10'. Owing to such constitution as above, the mechanical strength of the air cell can be increased by dispersing vertical force caused in the air cell.

Description

DETAILED DESCRIPTION OF THE INVENTION [Technical Field of the Invention] The present invention relates to an air IL pond! 1t is negative a・5ζ4(
4lij field improvement.

[Technical background of the invention and what's going on! ? [Point] A water-repellent substrate with gas permeability from porous polytetrafluoroethylene (polytetrafluoroethylene) to the gases used in conventional air batteries (4ξ, f9, and porous polytetrafluoroethylene). (-11 occupancy carbon, manganese dioxide, ◇1 ton, platinum 2c, etc. catalyst)
1;xi combination of 1;xi mixed with polytetrafluoroethylene and polytetrafluoroethylene. Apply or press the snout and touch it! The catalyst layer consists of nickel, silver, etc.

Crimping 4 pieces of multi-use grid or gilt bronze (
Assemble the IW water injection base catalyst layer and current collector into one.
Line 1115 proposes gas polarization in the form of a thin plateau.

This gas electrode is made by adding a catalyst such as platinum, nickel, or pafudium to a bonded substrate of nickel, charcoal, etc., or a pressurized body, and then making it water repellent by packing it in. Compared to , the manufacturing method is simple and has flexibility, so it has good processability. It has the advantage that it occupies a small amount of space inside the cell, which allows it to be filled with a large amount of negative electrode active material, and that it has excellent large current discharge performance.

However, this thin film-like falling electrode does not have sufficient mechanical strength, and there is a concern that the TY pole may buckle due to pressure from the top and bottom of the I4 cell when used as a core. The more detailed structure shown in Figure 1 is adopted. That is, the gas electrode 1'ffi is formed into a cylindrical shape or a rectangular tube shape, and its upper end is in contact with the periphery of the positive electrode terminal plate 8 via the lead 2. After that, a negative electrode mixture 6 and a negative electrode terminal 9 made by kneading zinc powder, an alkaline electrolyte, and a gelling agent are mixed into the top (Ill) of the top (Ill) through a separator 5. The body 7 is loaded into the negative electrode assembly 1 connected to the body 7, and the opening of the cup-shaped body is covered with a gasket 4 made of synthetic resin such as polyethylene or polypropylene.
It will be sealed at. Furthermore, the positive terminal.

The periphery of the negative electrode terminal is covered with an insulating sleeve 11, 12, which is crimped with a metal outer can 10 having an air intake hole 10.

In this battery structure, lIj pond t,;'j, ,)
Gasket 4 for pressure from the y direction. And conquer “
1 exterior can 10 can withstand the summer, but Cυ, the vertical force of 1 battery must be withstood by I5, Tonto Tagasumi pole 1, and ti da Ii3!
'lt Poor 1\1i1i of gilt copper, punched metal, etc. that make up the electrode: There is a limit to the pressure that the body can withstand. , if force is applied from above and below to the positive terminal and the negative terminal, the sealing plate and gasket will be buried, the gas pole will become shaped like a ♀, and in the worst case, it will cause the battery to explode.

To prevent this! 10:17 It is possible to increase the strength by making the body thicker, but this will result in a decrease of 8fA in the heavy oil, and the workability of the gas electrode will deteriorate.If the thickness increases further, it will cause problems with Fil and 71 due to 19T. There were drawbacks such as the traces of the battery being cut off and the battery not functioning properly.

[Purpose of the invention]

In view of the above-mentioned drawbacks, the present invention provides an air cell with high strength against vertical force.

[Summary of the invention]

The present invention uses cylindrical or square tubular air I'! <In order to increase the strength of the pond in the vertical direction, a negative electrode current collector is used to connect the sealing plates or gaskets that seal the upper and lower sides of the cylindrical or prismatic gas '1' pole, as shown in Figure 2 below. The present invention will be explained with reference to FIG. 3, taking nitrate-bent lead heavy oil as an example.

Figure 2i42 shows a cross-sectional view of the gas electrode used in the air pond 1a of the present invention.
A mixture of a catalyst powder such as activated carbon, manganese dioxide, silver, or platinum and a chemically resistant binder such as polytetrafluoroethylene is coated or formed into a sheet and pressed together to form a catalyst 1.
The water-repellent substrate, the catalyst layer, and the current collector are integrated by forming a grid and crimping a porous grid current collector made of nickel, silver, etc., or punched metal to this catalyst layer. The fW film-like gas bonded to the A dull annealing process has been applied.

This gas t4 (form the pole into a cylinder or square 1Fij shape,
0.05 to 0.1 mm 4jj to the current collector at the upper end
The thick IJf lead 2 made of metal such as nickel, copper, or silver is welded using a sporato welder or the like, and the other end of the lead 2 is made of nickel or a nickel-plated copper plate. The area around the positive electrode terminal plate 8 having a thickness of approximately 0.2 +++ m is made of sporato welder or the like (?'i %
Q1, Kirani (7) Gas the top of the pole with polyamide, polyethylene.

It is embedded in a battery cover 3 made of polypropylene, polytetrafluoroethylene, etc. to form a pot-shaped body.

Polypropylene, polyamide,
Thickness o, os~0.2 made of polyvinyl alcohol etc.
Separates made of my non-woven fabric~”l: jik M,'
L. This includes 30 mesh passes of frozen zinc powder, an alkaline electrolyte consisting of an aqueous solution of potassium hydroxide, sodium hydroxide, etc., and polyvinyl alcohol.

A negative electrode mixture 6 prepared by mixing a gelling agent such as sodium polyacrylate is filled. The blank electric body 7 made of copper, silver, silver, etc. is connected to the negative electrode terminal 9 having a thickness of about 0.2 mm, which has a nickel plate or nickel plated on the awn, and is connected to the battery through a separator or directly. Install it so that it touches the lid 3. In this case, the current collector is usually a cylinder with a diameter of 1 to 3 mm, but gold SA・4. punched metal,
A porous metal material may be used, and if it is considered insufficient in terms of strength, polytetrafluoroethylene or polyamide may be used.

It can also be reinforced with a resin such as polyethylene or a molded body of titanium oxide powder.

Furthermore, the opening of the pot is sealed with a gasket 4 made of polyamide, polyethylene, polypropylene, or the like. 0.05~Q, 2m around the positive and negative terminals
Covered with an insulating sleeve 11.12 made of resin such as polyvinyl chloride, polyethylene or polypropylene with a thickness of
It is crimped with a full-knit outer can 10 having the following properties.

As shown in Fig. 3, inside the battery cover 3, there may be plate-shaped objects made of stainless steel, steel plates, metals such as nickel, aluminum nitride, aluminum oxide, titanium chloride lamix, or lumps. By installing 12 as a reinforcement, it will not explode! You can further improve your performance.

〔Effect of the invention〕

According to the present invention, the negative electrode current collector is made of a cylindrical or prismatic gas electrode. f1i'
By connecting the gaskets sealed in the gasket, and if necessary, by using a reinforcing material in the gasket, it is possible to It is possible to disperse the force in the direction of Kuzenike-hi F without stopping the Uke with just the electrodes, and it is possible to greatly increase the strength of the 4.11 precepts of 'd3:ike.

[Embodiments of the invention]

' The present invention will be explained below based on examples.

Examples 1 to 3 A polytetrafluoroethylene film with a thickness of 100 μm in which 11 pores were evenly distributed and had an average pore diameter of 10 p was used as the water-repellent layer, and platinum 5 jif j@, as the porous catalyst layer.
6.6 A thickness prepared by mixing supported activated carbon powder with an average particle size of 100μ and polytetrafluoroethylene powder in an amount corresponding to its 20 weight QA, and rolling the obtained mixed powder by a conventional method. A 0.5mm film was used as a current collector layer. A nickel gold steel with y+@φ40 mesh was prepared.

Plant these in the above order and make the whole 'I: l tol
It was pressurized at a pressure of 1,/cm2 to form a gas electrode sheet.

The two sides 21+Im of the obtained sheet were connected, formed into a cylindrical shape, and welded together by spot welding, and the missing part of the gas electrode was filled with epoxy resin to form a cylindrical gas electrode. Further Q, 1111111)'# 2
) A gas electrode and a positive terminal were spot welded to both ends of the nickel lead, and the openings Ihi and i were sealed with a gasket made of polyamide resin to create a pot-shaped polarization.

Q. A separator made of a polypropylene non-woven fabric with a thickness of 1 mm was placed inside the pot-shaped 'ul electrode, and a zinc negative electrode mixture for LR was filled inside the separator. Furthermore, a negative electrode collection (if,
the gasket through the separator,
The open end of the battery element was sealed with polyamide resin to prepare battery element sample 1.

As the negative electrode current collector, a copper foam with a diameter of 5 mm containing a reinforcement 44 of polytetrafluoroethylene with a diameter of 3 mm in its center 111 was used. Sample 2 was created.

Gasket) 3 (m 3 see figure) thickness l rn
m.

Battery element sample 3 was prepared in exactly the same manner as sample 1, except that a stainless steel copper plate with a diameter of 7 mm was buried.

An outer can with a ``genki'' tag was installed on these samples, and LR-6 shaped circles (10 pieces were made in each pond.
Table 1 shows the average value of the pressure at which the gas electrode was damaged when force was applied in the IJ direction on L.

Table 1 Comparative Example A conventional example battery was prepared in exactly the same manner as Sample 1 of Example 1, with a gap of about 3 minutes between the negative electrode current collector and the metal cap 3.
Table 1 also lists the average value of the pressure when the gas electrode breaks when force is applied in the vertical direction of the battery.

The results shown in Table 1 show that by using the structure of the air battery of the present invention, its mechanical strength can be improved to a large degree, indicating that it has great industrial value.

Although the above embodiment has been explained about the cylindrical zinc-air battery, the same applies to the prismatic zinc nitride battery, and the same applies to the air-iron and nitrogen-magnesium batteries. Needless to say, it is effective.

[Brief explanation of the drawing]

Figure 1 is a conventional example! 2 and 3 are cross-sectional views of the air battery according to the embodiment of the present invention. 1... Gas electrode 2... Lead 3.
...Gasket 4...Gasket 5...
Sehalator 6...Negative electrode mixture 7...Negative electrode current collector
8...jF terminal - terminal 9...negative other terminal
1o...Exterior can 10...Air intake hole 1
1... Grommet 12... Reinforced kidnapping agent Patent attorney Rule 7.・Mansuke ((ri,y”
y-1 person) Figure 1 Figure 2 Figure 3 Figure I? t't4-to'

Claims (1)

[Claims] K) A water-repellent substrate having air permeability, 1. A thin film gas electrode consisting of a catalyst layer and a current collector layer υ that performs vapor chemical reduction is formed into a cylindrical shape (still a square tube), and the upper and lower ends of the gas electrode are made of synthetic resin, natural rubber, etc., respectively. In an air battery that is sealed and buried with a gasket consisting of υ, the gas tljl, the negative electrode current collector present inside the electrode, and the electrolyte resistant 1. An air battery characterized in that the air battery is V-connected to at least one of metal, plastic, and metal oxide molded bodies. (2. In claim 1, a reinforcing material made of metal or ceramics is provided inside the gasket that seals the upper and lower open ends of the cylindrical or prismatic gas pole. Air II pond characterized by being buried.