JPH07226211A - Alkaline battery and its manufacture - Google Patents

Abstract

PURPOSE:To manufacture an alkaline battery with high leakage resistance by forming a film of alkylthiol such as octadecanethiol on the surface or part of at least one of a container can and a cover or a current collector and a gasket. CONSTITUTION:A button type silver oxide battery measuring 6.8mm in outer diameter and 2.6mm in height consists of a negative can 1, a negative mix 2, an electrolyte impregnation material 3, a separator 4, a positive mix 5, a positive can 6, a gasket 7, and an electrolyte. Octadecanethiol is attached to the surface 1a of the negative can 1 and the surface 6a of the positive can 6. When the surfaces of the can and the cover or the current collector or the gasket, or a specific part relating to sealing is covered with alkylthiol such as octadecanethiol, the covered surface is shut out from air, and deterioration caused by oxygen and moisture in air is retarded. The battery can be assembled without microscopic deterioration in quality on the surface.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an alkaline battery and an improvement in its manufacturing method.

[0002]

2. Description of the Related Art Conventionally, in the production of alkaline batteries, a can, which is a container, a lid or a current collector, and a gasket are assembled as they are produced.

[0003]

In the containers of the above-mentioned conventional method, microscopic changes such as surface oxidation and alteration occur in the air, so that the alkaline liquid is likely to rise. Therefore, the conventional alkaline battery has a problem of leakage of the alkaline solution.

[0004]

In order to solve the above-mentioned problems, the present invention provides an alkylthiol such as octadecanethiol in one or more of all of a can, a lid or a current collector and a gasket which are containers. Apply the film of.

[0005]

As described above, when the surface of the can, the lid or the current collector and the gasket, or the surface of the specific portion related to the sealing is coated with alkylthiols such as octadecanethiol, the surface is exposed to the air. It is blocked, and deterioration due to oxygen, moisture, etc. in the air is suppressed. Therefore, it is possible to assemble the battery without causing microscopic deterioration of the surface.

[0006]

EXAMPLE The present invention was carried out in a button type silver oxide battery having an outer diameter of 6.8 mm and a height of 2.6 mm. The constituent elements are the negative electrode can 1, the negative electrode mixture 2, the electrolytic solution impregnating agent 3, the separator 4, the positive electrode mixture 5, the positive electrode can 6, the gasket 7, and the electrolytic solution. Octadecanethiol is the surface 1a of the negative electrode can 1 and the positive electrode can 6.
And 6a. The product of the present invention was compared and evaluated with the battery of the prior art, and the results shown in Table 1 below were obtained. The evaluation method is to compare the number of leaked liquids after storing for 100 days in a constant temperature and humidity chamber of 60 ° C. × 90% Rh.
It is an individual.

[0007]

[Table 1]

Incidentally, sodium hydroxide was used as the electrolytic solution.

[0009]

EFFECTS OF THE INVENTION It is clear from the results of comparative evaluation of Examples and conventional products that the present invention has the effect of improving the liquid leakage resistance of alkaline batteries. The octadecane thiol coating has been shown to be effective in protecting the surfaces of container parts. In addition, although there are various kinds of alkyl thiols such as dodecane thiol, decane thiol, and octane thiol, all of them are effective because they form the same film and have the same action as octecan thiol.

[Brief description of drawings]

FIG. 1 is a partial cross-sectional view showing an embodiment of an alkaline battery of the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Negative electrode can 1a Ocdecane thiol attaching surface of negative electrode can 2 Negative electrode mixture 3 Electrolyte impregnating material 4 Separator 5 Positive electrode mixture 6 Positive electrode can 6a Ocdecane thiol attaching surface of positive electrode can 7 Gasket

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Nobuyoshi Takahashi 5-30-1 Nishitaga, Taichiro-ku, Sendai-shi, Miyagi Seiko Electronic Components Co., Ltd. (72) Go Tsuyoshi Shishido 5-30, Nishitaga, Taihaku-ku, Sendai-shi, Miyagi No. 1 in Seiko Electronic Components Co., Ltd. (72) Inventor Shigehiro Inomata 5-30-30 Nishitaga, Taihaku-ku, Sendai-shi, Miyagi Prefecture In Seiko Electronic Components Co., Ltd. (72) Toyo Hayasaka Nishitaga, Taishiro-ku, Sendai-shi, Miyagi Prefecture 5-30-1 Seiko Electronic Components Co., Ltd.

Claims (1)

[Claims] 1. An alkaline battery comprising a step of disposing an alkyl thiol such as octadecane thiol on the surface of a can, a lid, a current collector, and a gasket as a container or a part thereof, and the production thereof. Method.