JPS58201260A - Battery manufacturing method - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention provides a method for sealing the opening of a battery case containing a power generation element, such as a silver oxide battery, a mercury battery, or a zinc-air battery, by using a sealing plate via an insulating sealant. The present invention relates to a method for manufacturing a button-type battery that is sealed tightly. The purpose of this is to increase the compression ratio of the sealing plate kink that contacts the side wall of the battery case, thereby improving leakage resistance and enabling a design that increases the internal volume of the sealing plate to increase battery capacity. It is in.

The manufacturing method of the present invention is characterized by first forming a battery having an outer diameter larger than the desired outer diameter of the battery, and then applying force from the outside over the entire side surface of the battery case using rollers to form the desired outer diameter of the battery. The purpose is to reduce the diameter.

Hereinafter, embodiments of the present invention will be described with reference to the drawings, while comparing them with the example of the Song Dynasty.

Figures 1 and 1B show the structure of a button ff1li silver oxide battery manufactured by the conventional manufacturing method and changes in the outer diameter dimensions of the parts, and Figures 2 and 2 show the structure and changes in the outer diameter dimensions of the button ff1li silver oxide battery according to the present invention. It shows the change in outer diameter dimensions of parts. In the figure, numeral 1 is a spider-shaped gold case, and numeral 2 is a positive electrode mixture placed at the inner bottom of the case 1, which is made by press-molding a mixed powder of silver oxide, graphite, etc. 3 is a separator placed on the positive electrode mixture 2;

4 is an electrolyte-impregnated material placed on the top of the separator 3, which is impregnated with an alkaline electrolyte. Reference numeral 5 denotes a negative electrode mixture disposed at L of the impregnating material 4, which is made of a mixed powder of hardened curved lead, a thickener, etc.

Reference numeral 6 is a ring-shaped insulating sealing banking having an angular cross-section, and is made of synthetic rubber with excellent elasticity and flexibility, or synthetic resin with excellent aging resistance and mechanical strength. Reference numeral 7 denotes a single metal bent seal plate in the shape of an inverted vessel which closes the opening of the case 1 with an insulating seal banking 6 interposed therebetween.
A folded portion 7b extending in a U-shape is provided. 8 is on the inside wall of the case) 1) Prevents burrs on fIJ! Gold 1 with a cross-section shape inserted for 1-4,
It is 41J.

In this manufacturing method for one lid shown in Figure 1, the outer diameter C of the battery case was designed to be approximately equal to the outer diameter d of the completed battery before the battery was assembled in step 5. Therefore, the design is based on the outer diameter a of the sealing plate 7 and the outer diameter d (=c) of the sealing pano and king 6, and the degree of compression of the sealing rock jig and the increase in the inner volume of the sealing plate are determined by the q'' method. It was restricted.

On the other hand, in the manufacturing method of the present invention shown in FIGS. 2A, B, and C, the outer diameter C' of the battery case 1 is designed dimensionally larger than the outer diameter d'' (-d) when the battery is completed. Accordingly, the outer diameter a/ of the sealing plate 7 and the outer diameter b' of the sealing plate 7 are designed to be larger than the conventional ones.Using these exterior members, the outer diameter of the battery when completed is larger than the outer diameter d''. B. Make a battery with d'. Thereafter, one or more planetary rollers 9 are used to narrow down the entire side surface of the battery case 1 to a desired battery outer diameter alL to reduce the diameter as shown in C. The drawing allowance at that time is
Although the side portions of the sealing plate 7 are compressed, the outer diameter a' of the sealing plate 7 is not changed significantly. By using IAl as described in 2 above, a battery was obtained in which the compression ratio of the side portion of the sealing plate was larger than that of the conventional battery, and the capacity could be expected to be increased by the larger internal volume of the sealing plate.

Below, we will discuss a silver oxide battery 5R44 manufactured using a conventional manufacturing method, and a negative electrode composite with a sealing plate outer diameter 0.3 mm larger than A and a negative electrode mixture filling rate with respect to the sealing plate inner volume equal to that of battery A. A comparison with battery B according to the present invention using an amount of positive electrode mixture commensurate with the amount of agent is shown.

Table 1 shows the number of batteries that leaked over the storage period when 100 batteries A and B were stored in an environment with a temperature of 600°C (relative humidity of 90-95%).

Table 1 Also, when 5 each of Battery M and Battery B are discharged using a resistance of 7.5Ω, the discharge capacity meter is compared.Battery B is 1.08Ω
It was double that.

Figures 3, B, and C show another embodiment of the present invention applied to the film formation of a button air zinc battery. 1 in the diagram
An air hole 1a is provided at the bottom of the battery case shown in .The air introduced through the air hole 1a is passed through the diffusion paper 10. The catalyst layer 21f (supplied, activated here, and reacted with the negative electrode mixture 5 mainly composed of monolayer lead) is passed through the water congratulation membrane 11 and serves as a positive electrode.The positive electrode catalyst layer 2 is , activated carbon powder, acetylene black, manganese dioxide powder, etc.
A paste made by kneading fluorinated ethylene resin as a binder was applied to a metal net, and the net was punched out into a disk shape.

In this case as well, the outer diameter C' of the battery case 1 is designed to be larger than the outer diameter d'' (-a) of the completed battery, and accordingly the outer diameter a' of the sealing plate 7 and the sealing plate 7 are 6 outer diameter b
′ is also designed larger than before. Using these exterior members, a battery having an outer diameter d' larger than the outer diameter d'' of the completed battery is formed as shown in B. Thereafter, one or more planetary rollers 9
Then, use the completed battery outer diameter d' to narrow down the outer diameter of the battery case 1 as shown in C. The drawing margin at this time is such that although the side portions of the sealing robber king 6 are compressed, the outer diameter a' of the sealing plate 7 does not change too much. By doing as above, iL
The compression ratio of the sealing lobe king θ side is greater than before,
A battery was obtained in which the interstitial net in the catalyst had good contact with the inner wall of the battery case, and the inner volume of the sealing plate was large.

The following is a battery C manufactured by Junto's film manufacturing method for an R44 type (battery outer diameter and height is equivalent to S R44) zinc-air battery, and a sealing plate with a sealing plate outer diameter 0.3 mm larger than that of C. A comparison will be made with a battery according to the present invention in which the filling ratio of the negative electrode mixture to the internal volume is the same as that of battery C, and the amount of the positive electrode mixture matches the amount of the negative electrode mixture by 1-1. Table 2 shows humidity 6
When 100 batteries each of C and D were stored in an environment of 0° C. and relative humidity of 90 to 95%, the number of batteries that leaked during storage is shown.

Table 2 also shows that when five batteries C and D were discharged using a resistance of 620Ω, the discharge capacity D was 1.07 times that of C.

[Brief explanation of the drawing]

Figures 1 and 1B are cross-sectional views showing the state before and after assembly of a button-type silver oxide battery using the conventional film-forming method; Figures 2A, B, and CI''
i A cross-sectional view showing the manufacturing process of a button I9 silver oxide battery in the 'X rotation example of the present invention and the change in the outer diameter dimension as a battery,
FIGS. 3A, 3B, and 3C are cross-sectional views showing the manufacturing process of a button-type air cell according to another embodiment of the present invention and changes in the outer diameter of the cell. 1...Battery case, 1a...Air hole, 2
......City electrode mixture, 2'...Positive electrode 1@medium layer, 3...Separator, 4...Electrolyte impregnated material, 6... ...Negative electrode mixture, 6...P edge sealing, 7... Sealing plate, 9...
Roller for diameter reduction, 10...Air diffusion paper, 1
1...] Water membrane. Name of agent: Patent attorney Masao Nakao and 1 other person No. 1
Figure 2 (

Claims (2)

[Claims] (1) Insulate and seal the battery case and the opening of this case.
A method of manufacturing a battery in which a power generating element is exteriorized with an exterior member consisting of a sealing plate sealed via a backing, in which a battery having an outer diameter larger than the desired battery outer diameter is formed, and then a roller is used to A method for manufacturing a battery, which comprises applying force from the outside to the entire side surface of a battery case to reduce the outer diameter of the battery to a desired outer diameter. (2) The method for manufacturing a battery according to claim 1, wherein the battery case has an air hole at the bottom and also serves as a terminal for one pole.