JPH0831391A - Battery manufacturing method, marking method for metal outer can used for the battery, and aligning device used for the marking method - Google Patents

Abstract

(57) [Abstract] [Purpose] By engraving a laser on a specific surface position of a metal outer can, the problem of liquid leakage when using a laser beam is overcome, and the quality of the marking is improved by increasing the sharpness and the display. The purpose is to improve the efficiency of the work of switching the marking contents. [Structure] The metal outer can 13 is a single body and is stamped on the side surface of the metal outer can by a laser beam except for the abutting portion 14, and the rotation stopper 16 and the notch 15 of the metal outer can 13 are formed. Upon fitting, the rotation of the metal outer can 13 by the rotating roller 18 is stopped, the directions of the metal outer can 13 are aligned, and marking is performed by a common laser light source.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method of manufacturing a battery, a method of marking a metal outer can used for the battery, and an alignment device used in the method of marking.

[0002]

2. Description of the Related Art A conventional method for manufacturing a battery will be described below.

FIG. 3 is a semi-mounting side sectional view of a typical manganese dry battery using a metal outer can. The inside of the positive electrode 3 made of the carbon rod 1 and the positive electrode mixture 2, the negative electrode 4 made of a zinc can, the electrolytic solution-impregnated separator 5 for separating the two electrodes, and the bottom paper 6 is sealed with a resin-sealed opening. The battery is covered with a body 7, a bottom plate 8 and a seal ring 9 are used, the whole battery is wrapped with a resin tube 10, a cap 11 and an insulating ring 12 are used to seal the battery, and the whole is covered with a metal outer can 13. There is. Then, necessary markings such as manufacturing date and manufacturing number are provided on the bottom plate 8 as shown in FIG. Figure 4
The bottom plate 8 shown in (1) was stamped with a stamping die when it was molded from a flat plate by a press machine.

However, when the stamping die wears, there is a problem that the marking display contents become unclear, and the stamping die management is complicated.

When the marking content is changed, the productivity is inevitably reduced due to a waste of time for changing the marking die in manufacturing the bottom plate.

On the other hand, the smaller the battery size is, the smaller the display content becomes, and there is a problem that it cannot be clearly seen. Therefore, it has been desired to improve the quality of the marking display.

In order to solve these various problems, there has been proposed a technique in which after the battery is completed, the side surface of the metal outer can of the completed battery is marked with laser light.

[0008] However, when this method is used, some of the metal outer cans are engraved on the designed part, which is aesthetically unfavorable.

Further, when the laser beam is applied to the abutting portion, which is a minute void portion on the side surface of the metal outer can, not only the characters of the marking are missing, but also a hole is opened in the resin tube 10 through the minute void. I will end up. If a hole is formed in this resin tube 10, it will cause liquid leakage when the battery is consumed.

[0010]

Problems to be Solved by the Invention A conventional engraving method on a bottom plate before completion of a battery has a problem such as wear of the engraving mold and difficulty in seeing due to battery size. When a can is engraved with laser light, laser light may be irradiated to the abutting portion, which is a minute gap in the vertical direction on the side surface, which may cause inconvenience.

Therefore, the present invention solves the above-mentioned conventional problems, and a method for easily and easily producing a battery with excellent marking, a method for marking a metal outer can used for the battery, and the marking. It is an object to provide an orientation device for use in a method.

[0012]

SUMMARY OF THE INVENTION In order to achieve the above-mentioned object, the present invention according to claim 1 is a surface excluding an abutting portion which is a linear gap in a vertical direction generated by forming a cylindrical bending. A metal outer can engraved with laser light on the top, positive and negative electrodes, electrolyte impregnated separator, cap, bottom plate,
This is a method for manufacturing a battery by assembling other battery components such as a resin tube.

According to a second aspect of the present invention, there is provided a step of aligning abutting portions, which are linear gaps in the vertical direction, formed in a plurality of metal outer cans before being assembled into a battery by a cylindrical bending formation in a certain direction, A light source for irradiating laser light is arranged on the surface of the metal outer can excluding the butt portion,
The present invention provides a method for engraving a metal outer can with a step of continuously engraving the surface of a large number of metal outer cans with the same laser light source.

According to a third aspect of the present invention, a notch portion is provided at a fixed position on the peripheral edge of the opening with respect to the abutting portion, which is a linear gap in the vertical direction generated by forming the cylindrical bending, and the metal sheath is formed. Rotating the metal outer can while pressing the rotation stopping body against the opening peripheral portion having the cutout portion of the can,
When the rotation stopper fits into the cutout portion of the metal outer can, the rotation of the metal outer can is stopped, and the butting of a large number of metal outer cans in which the butting portions of the metal outer can are aligned in a certain direction. This is a method for engraving a metal outer can in which a common laser light source is used for engraving with a laser beam on the surface excluding parts.

According to a fourth aspect of the present invention, the metal outer can in the invention according to the third aspect is formed as a cutout portion at the end of the abutting portion of the metal outer can, and the metal outer can is connected to the battery. In this case, the V-shaped notch provided for curling the edge of the metal outer can is used to engrave the metal outer can.

According to a fifth aspect of the present invention, there is provided a roller for rotating a metal outer can, which has a butting portion which is a linear gap in the vertical direction generated by the formation of a cylindrical bend, and a notch portion on the peripheral edge of the opening. A rotation stopper pressed against the opening peripheral edge of the metal outer can, and when the rotation stopper fits into a cutout portion of the metal outer can, the rotation of the metal outer can is stopped and the metal outer can is rotated by the rotating roller. This is a direction aligning device used in a method of marking a metal outer can, which is configured to be separated.

[0017]

In the invention according to claim 1, since the metal outer can is engraved except for the abutting portion in the state before being assembled and configured as a battery, the engraved character may be missing, or laser marking may be used. It is possible to manufacture a battery that does not have a hole in the resin tube.

Further, in the invention according to claim 2, before assembling and constructing a large number of metal outer cans as batteries, the directions can be aligned and engraved by a common laser light source.

In the invention according to claim 3, a plurality of metal outer cans can be aligned in the direction by utilizing the cutout portions of the metal outer cans, and the metal outer cans can be engraved by a common laser light source. it can.

Further, in the invention according to claim 4, the V-shaped notches for making it possible to smoothly connect the metal outer can to the battery are also used as the notches, and the directions of the metal outer can are aligned. You can

In the invention according to claim 5, the directions of the metal outer cans can be aligned mechanically.

[0022]

An embodiment of the present invention will be described below with reference to the drawings.

First, the battery outer can will be described. As an example of the battery outer can used in the present invention, a metal outer can 13 in which a V-shaped notch 15 is provided at the end of the abutting portion 14 as shown in FIG. As shown in FIG. 1, a metal outer can 1
The V-shaped rotation stop body 16 is pressed against the upper portion of the notch 15 of 3, and the metal outer can 13 is indirectly rotated by the two rotating rollers 18 while being attracted by the magnet 17. The rotation stopper 16 is pressed against the metal casing 13 and the lower end of the rotation stopper 16 is fitted into the V-shaped notch 15 of the metal casing 13 to stop the rotation of the metal casing 13 so that the position of the metal casing 13 is changed. Decide, butt 1 of metal outer can 13
Remove 4 and always irradiate the same position with any laser light,
Since it is engraved, it is not engraved on the design part, there are no letters missing, and there is no hole in the resin tube.

According to the present embodiment, a sufficient effect was recognized in the comprehensive evaluation such as the improvement of the quality by the marking sharpness and the display enlargement, the efficiency of the work of switching the marking content, and the prevention of liquid leakage.

In this embodiment, the metal outer can 13 has a V-shaped notch 15 formed on the upper edge so that the upper edge of the metal outer can 13 can be smoothly curled and coupled with other battery components.
The metal outer can 13 is fitted to the rotation stopper 16
The same effect can be obtained if it is a metal outer can for a battery that has a notch part that can stop the rotation of. The printing layer on the side surface of the metal outer can which is irradiated with the laser light is vaporized, and the traces of the printing layer become markings, but markings can be made even by irradiation of the laser light even on the metal surface.

[0026]

As described above, the present invention solves the problem of liquid leakage due to laser light by eliminating the problems of the size of characters and the wear of the marking die in the conventional marking on the bottom plate. It is possible to realize a battery and a marking method which are excellent in marking in a position, a size and a sharpness which are easy to see, and a direction aligning device therefor.

[Brief description of drawings]

FIG. 1 is a perspective view of a main part of a direction aligning device according to an embodiment of the present invention.

FIG. 2 is a perspective view of a metal outer can according to one embodiment of the present invention.

FIG. 3 is a semi-mounting side sectional view of a manganese dry battery in a conventional example.

FIG. 4 is a plan view of a bottom plate in a conventional example.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Carbon rod 2 Positive electrode mixture 3 Positive electrode 4 Negative electrode 5 Electrolyte impregnated separator 6 Bottom paper 7 Resin sealing body 8 Bottom plate 9 Seal ring 10 Resin tube 11 Cap 12 Insulation ring 13 Metal outer can 14 Butt portion 15 Notch 16 Rotation stop body 17 magnet 18 rotating roller

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

Claims (5)

[Claims] 1. A metal outer can, which is stamped with a laser beam on the surface excluding the abutting portion, which is a linear gap in the vertical direction generated by the formation of a cylindrical bend, a positive electrode, a positive electrode mixture, a negative electrode, and an electrolytic solution. A method for manufacturing a battery, which comprises assembling an impregnated separator, a cap, a bottom plate, and another battery component such as a resin tube. 2. A step of aligning the abutting portions, which are linear gaps in the vertical direction generated by the cylindrical bending formation of a large number of metal outer cans before assembling into a battery, in a certain direction, and the metal outer casing excluding the abutting portions. A method of marking a metal-coated can, comprising a step of arranging a light source for irradiating a laser beam on the surface of the can and continuously marking the surface of a large number of metal-coated cans with the same laser light source. 3. An opening having a cutout portion of the metal outer can, wherein a cutout portion is provided at a fixed position on the peripheral edge of the opening with respect to a butting portion which is a linear gap in the vertical direction generated by forming a cylindrical bending. The metal outer can is rotated while pressing the rotation stopping body against the peripheral portion, and the rotation stopping body is fitted into the cutout portion of the metal outer can to stop the rotation of the metal outer can. A method for marking a metal outer can using a common laser light source on a surface of a large number of metal outer cans in which the abutting parts are aligned in a certain direction except the abutting parts. 4. The cutout portion of the metal outer can according to claim 3, which is formed at an end of a butted portion of the metal outer can, and which is formed at an edge of the metal outer can when the metal outer can is connected to a battery. A method of marking a metal outer can using a V-shaped notch provided for curling. 5. A rotating roller for rotating a metal outer can, which has a butting portion which is a linear gap in the vertical direction generated by forming a cylindrical bend, and a cutout portion on the peripheral edge of the opening, and an opening of the metal outer can. A rotation stop body pressed against the periphery,
Direction used for engraving method of metal outer can configured to stop rotation of the metal outer can when the rotation stopper fits into the cutout portion of the metal outer can and separate the metal outer can from the rotating roller Alignment device.