JPH05266865A - Exterior label for alkaline batteries - Google Patents

Abstract

(57) [Summary] [Purpose] An alkaline battery exterior label that can be detected electrically as a defective insulation product by solving the problem that a defective product in which electrolyte leaked from a unit cell could not be detected in a foil exterior alkaline battery. The purpose is to provide. [Structure] The insulating heat-shrinkable synthetic resin film 3 of the outer label and the printing layer 2 are not partially laminated, but the aluminum vapor deposition layer 4 is partially exposed. When the alkaline electrolyte leaks from the unit cell, the adhesive layer 5 and the aluminum vapor deposition layer 4 are dissolved and the metal container is exposed. If a high voltage is applied between the positive electrode terminal and the exposed metal portion, it can be detected as a defective insulation product.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an outer label for alkaline batteries.

[0002]

2. Description of the Related Art In an alkaline battery using an aqueous alkaline solution as an electrolytic solution, the electrolytic solution may be defective due to a defective molding of a resin gasket used for sealing the battery or a defective press working of a case filled with an active material. May leak to the outside, which may lead to deterioration of battery performance or damage to equipment using batteries. In an alkaline battery in which the unit cell is packaged in a metallic outer can that is electrically insulated from the positive electrode terminal and the negative electrode terminal, if the electrolyte leaks from the unit cell, the leaked electrolyte solution may leak through the inner surface of the outer can. The terminals and the outer can become conductive, resulting in poor insulation. Therefore, by applying an alternating high voltage between the positive electrode terminal and the metal exposed portion on the surface of the outer can, the battery in which the electrolytic solution has leaked can be electrically detected as a defective insulation product.

[0003]

However, in the case of an alkaline battery using an exterior label, the surface of the aluminum vapor deposition layer of the exterior label is covered with a non-conductive heat-shrinkable synthetic resin film, so that the above insulation failure occurs. It was not possible to detect the alkaline battery in which the electrolyte leaked with the detection device. The present invention solves such a problem, and an object of the present invention is to provide an exterior label for an alkaline battery capable of detecting an electrolyte leakage battery.

[0004]

In order to achieve this object, the outer label for an alkaline battery of the present invention is partially heat-shrinked in order to detect an alkaline battery from which electrolyte leaks as defective insulation. The synthetic resin film and the printed layer are not laminated, and the aluminum vapor deposition layer is partially exposed.

[0005]

With this structure, when the electrolytic solution leaks from the alkaline battery, the adhesive layer and the aluminum vapor deposition layer are dissolved and the metal container is exposed. Therefore, a high voltage is applied between the exposed metal part and the positive electrode terminal of the battery. If so, it can be detected as a defective insulation product.

[0006]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An alkaline battery label according to an embodiment of the present invention will be described below in detail with reference to the drawings.

In FIG. 1, an insulating adhesive layer 5 is provided on the back surface.
The insulating heat-shrinkable synthetic resin film 3 and the printing layer 2 are laminated on the surface of the aluminum vapor-deposited layer 4 having the above, and the varnish coat 1 is applied. When the electrolytic solution of the alkaline battery using this outer label leaks from the unit cell, the adhesive layer 5 and the aluminum vapor deposition layer 4 are melted by the alkaline electrolytic solution to expose the metal container. Therefore, if a high voltage is applied between the exposed metal part and the positive electrode terminal of the battery, a current flows, so that it can be detected as a defective insulation product. Table 1 shows the leak detection failure status of alkaline batteries when the conventional outer label and the outer label of the present embodiment are used.

[0008]

[Table 1]

As shown in Table 1, when the conventional outer label was used, 100 leaking defective products could not be detected at all, but when the outer label according to the embodiment was used, All 100 could be detected.

[0010]

EFFECTS OF THE INVENTION As is clear from the description of the above embodiments, according to the outer battery label for an alkaline battery of the present invention, the electrolytic solution leaks out by partially exposing the aluminum vapor deposition layer of the outer battery outer label. Batteries can be detected.

[Brief description of drawings]

FIG. 1A is a cross-sectional view showing a main part of an outer battery label for an alkaline battery according to an embodiment of the present invention. FIG. 1B is a plan view showing the main part.

[Explanation of symbols]

 2 Printing layer 3 Heat shrinkable synthetic resin film 4 Aluminum vapor deposition layer 5 Adhesive layer 6 Partially exposed aluminum vapor deposition layer

 ─────────────────────────────────────────────────── ─── Continuation of front page (72) Inventor Mitsuyuki Yamamoto 1006 Kadoma, Kadoma City, Osaka Prefecture Matsushita Electric Industrial Co., Ltd.

Claims (1)

[Claims] 1. An outer label for an alkaline battery, comprising a heat-shrinkable synthetic resin film and a printing layer laminated on the surface of an aluminum vapor-deposited layer having an adhesive layer used for bonding with an alkaline battery main body on the back surface. An outer label for an alkaline battery, which has a heat-shrinkable resin film and an aluminum vapor-deposited layer with a printing layer partially exposed.