JPS59173943A - Button type alkaline manganese battery - Google Patents

Abstract

PURPOSE:To prevent deformation of a negative can toward inner direction and increase leakage resistance by setting a cutting off part in the portion, to be in contact with the circumference of the negative can, of a gasket. CONSTITUTION:A positive mix 2 comprising manganese dioxide and graphite, and a separator are accommodated in a positive can. A gasket 4b in which a cutting off part a is set in the portion to be in contact with the circumference of a negative can is inserted into the positive can 2. An electrolyte absorbent material 5, a negative mix 6 comprising amalgamated zinc powder, carboxymethylcellulose, and sodium acrylate are placed on the separator 3. After electrolyte is poured, a negative can 7 is covered on them, then a battery is sealed. By this construction, an alkaline battery having good leakage resistance is obtained.

Description

[Detailed Description of the Invention] The present invention is a button-shaped alkali manganese! Regarding improvements to pond backings, is it possible to provide all batteries with excellent leakage resistance? purpose.

In order to streamline the AA manufacturing method, the inventor Ren'
A battery shown in FIG. 2 has been disclosed using a U-shaped backing with a cross-sectional shape shown in condyle (A).

Figure 1 (A) is a cross-sectional view of the backing of a pond where π is conventionally cut S.
Don't look over your shoulder.

FIG. 2 is a cross-sectional view of a conventional battery.

In the figure, 1 is a positive electrode can that houses a positive electrode mixture 2 and a separator 3. Next, insert backing 4ai. Further, 500 ml of electrolytic impregnating material was inserted, and 6 ml of negative electrode mixture was completely filled. Finally, an alkaline electrolyte is injected, and a negative electrode can 7 is placed on top to seal the final product.

However, in this battery structure, there is no notch on the surface of the backing that is in contact with the outer periphery 215 of the negative electrode can, so when sealing the battery, the circular thickness of the backing is large, so the negative electrode can is deformed inward. However, there is a disadvantage that the pressing force between the backing and the negative electrode can is reduced, reducing leakage resistance.

The present invention eliminates the drawback described in 1.The present invention prevents the inside deformation of the negative electrode can by providing a notch in the surface of the backing that comes into contact with one circumference of the negative electrode can, and improves leakage resistance. The present invention provides an excellent buhibutton type alkaline manno f2/metal pond.

FIG. 1(B) is a sectional view of the backing according to FIG. 1(8), which is further improved.

In the figure, a is a cut provided on the surface in contact with the outer periphery of the negative electrode can;
Department.

FIG. 5 is a side view of the battery of the present invention using the backing shown in 1(2) CB)'vc.

In the figure, ] is the positive electrode can, and the positive electrode mixture 2. is composed of manganese dioxide and graphite. Store the separator 6 and move up.

Then, the backing 4b:1 according to the invention is inserted.

In addition, insert 5 pieces of impregnated with decomposition liquid and add frozen zinc powder.

A negative electrode made of carbon dimethyl cellulose and polyacrylic acid powder is filled.Finally, an alkaline electrolyte is injected, and an electrode can 7 is placed on the battery to seal the battery.

Next, the second [t+, button type alkali 9 ng 7 ? shown in Figure 3]. Il, Pond LR44 (5M diameter 11.6h+m, high-
g 5.4 mm.

The leakage resistance was investigated by assembling the nominally 100 mAh). The results are shown in table 1 [/j].

It is data n-20.

Table p, HH131a oOh <-140℃, relative humidity #90~95 storage rate after storage for 1000 hours, Ell (middle 8 20 days + I6o C, relative humidity 9
7. Store for 20B1 at 0-95%. Later on, the liquid leakage rate of the battery was stored at 60℃ for 20 days, and the negative electrode resistance was 5Ω, and the final voltage was 1.2μ. The rate of side fluid generation after storage at room temperature for 6 months is shown.

Among them, liquid leakage detection is fC4゜, which treats anything above the level that can be determined as a secondary liquid under a microscope with a magnification of 10 as a liquid leakage. It has superior leakage resistance compared to FC batteries.

As described above, the present invention can provide an alkaline manganese battery with excellent leakage resistance, and the industrial value is significantly increased.

[Brief explanation of drawings]

1st + (/1.) is a cross-sectional view of the conventional backing, younger brother 1
Figure (B; 1 is a cross-sectional view of the backing of the present invention, Figure 2 is a cross-sectional view of a conventional button-type alkaline manganese battery, and Figure 3 is a cross-sectional view of the button-type alkaline manganese battery investigated by the present invention. 1... ...Positive electrode can 2...Positive electrode mixture 3...Cellulose 4a, 4b...
Backing 5... Fertilizer solution impregnation material 6...
...Negative electrode mixture 7...Negative electrode can a...
... Above the notch Figure 1 (A) Figure 1 (B) α Figure 2 Younger brother Figure 3

Claims (1)

[Claims] Diacid ratio mankan? A surface of the backing that is in contact with the negative electrode hierarchy periphery, comprising a positive electrode as an active material, a negative electrode as an active material of frozen zinc, and a U-shaped banking with a cross section that insulates and seals between the two electrodes. Features a cut-out section]
Noru button type alkaline manganese pond.