JPS5844665A - Marking of battery - Google Patents

Abstract

PURPOSE:To mark manufactured years, months and so forth minutely on batteries clearly by a simple method so that they don't rub off by carving letters, marks and so forth on the surface of a synthetic resin member, which is a part of the exterior case of a battery, with a laser beam. CONSTITUTION:A mark written on an insulating plate 15 not only has various colors but also is carved on the surface of the plate 15. Therefore, it extremely hardly rubs off differently from usual print with ink. Since an optical image pattern obtained with a laser beam (l) is marked on the plate 15, a minute pattern can be highly clearly marked by properly reducing a pattern formed on a mask 6 by means of an optical system 5. Only an exceptionally short time is required to burn and broil the surface of the synthetic resin, and any time which was taken conventionally in order to dry ink becomes unnecessary. In addition, since marking of a battery can be performed in a remarkably short time without touching the battery, letters, marks and so forth can be efficiently carved successively on completed batteries sent on a line.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a method for marking the date of manufacture, etc. on the surface of the outer case of a battery.

As is well known, in a typical battery, a product name or the like is printed on the surface of a cylindrical metal outer case. This printing can be carried out in case of parts stage.If the battery is sold as a part and cannot be distributed, it must be marked with letters or marks indicating the date of manufacture. Letters indicating the month and year of manufacture, etc. must be clearly marked and must not be easily visible, and letters or marks indicating the month and year of manufacture, etc. must be marked on battery parts. Marking the part in advance means that the lead time until the part is used is generally rounded off, and there is no reason to do this. Therefore,
Markings such as characters indicating the date of manufacture must be made on completed batteries immediately before shipment.

Conventionally, II4 markings such as characters indicating the year of manufacture were placed on the outside of the battery case 1iKml! In those that do, it is done by a nine layer printing method using ink.

However, with this method, it is not possible to make minute markings, the ink takes time to dry, and it is difficult to print pre-designed designs such as the above-mentioned name of the tsuba item.

Printing the manufacturing date on the top will result in a clear starting point, which will affect the printing on the base! It is extremely difficult to make the characters such as the date of manufacture difficult to erase without causing any damage, and the disadvantages are that it is expensive.

This invention has been developed to solve the above-mentioned conventional problems, and the purpose of this invention is to use a simple method to write fine letters or marks indicating the date of manufacture etc. on a part of the surface of the outer case of the battery. The goal is to make it clear and easy to use.

In order to achieve this object, the present invention is characterized in that letters, marks, etc. are formed on the surface of a synthetic resin member constituting a part of the outer case of the battery using a laser beam.

DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, an embodiment of the battery marking method according to the present invention will be described in detail with reference to the drawings.

The battery marking method according to the present invention forms an optical image such as a mark inside a character, which is created by a laser light source and an appropriate optical system, on the surface of a synthetic resin member that constitutes a part of the outer case of the battery. The surface of the synthetic resin member in the circular image area irradiated with the laser beam is particularly moldy when the above-mentioned letters, marks, etc. are formed.

Here, in order to explain the synthetic resin member that forms a part of the external case of the battery, 6 batteries as shown in Fig. An anode terminal 13 and a cathode terminal 14 are located on both end faces of the metal case 12, and a disk-shaped insulating plate 1B having a center hole through which the anode terminal 1sv/1KFio terminal 13 passes is mounted. This insulating plate tS is made of synthetic resin such as vinyl chloride.

In the present invention, the insulating plate tsl* occupies most of one side of the outer case of the battery 11, the insulating plate tS is a synthetic resin member that constitutes a part of the outer case of the battery 11. The front @lfc of the insulating plate 15 is used to display characters, marks, etc. indicating the year and month of preparation.

FIG. 2 schematically shows an apparatus for implementing the battery marking method according to the present invention. Here, first, a laser beam t emitted from a V-laser emitter 8 is guided to an optical system 6 by a reflecting mirror 4. In the optical system 6, the laser beam t
The light is once diffused (using a concave lens or the like) and then passed through a mask 6. The mask 6 is made of a transparent stencil or the like with characters or markings indicating the date of manufacture etc. punched out. The V-the light ray t passing through the mask 6 is focused by lenses 7a and 7b and irradiated onto a predetermined position on the surface of the insulating plate 150 of the battery 10. Then, a bright and dark image of the pattern punched out on the mask 6 is formed on the outer surface of the insulating plate tS. This butter/
1i11gA received V-the ray t.

Only the light-receiving portion of the synthetic resin of the insulating plate 15 is partially cauterized, and that portion turns a dark purple color, and the surface texture of that portion changes to form irregularities. the result,
The above-mentioned pattern, that is, the letters and markings representing the month of manufacture, are formed by the surface rMK color and the unevenness of the insulating plate 15. here.

Is the ground color of the insulating plate 1s clearly browned (often yellowish) by the laser beam @tK? j! It is preferable to choose a color that will be recognized by the user.Also, this starting point is not only a color change, but also carved by the surface 1iK unevenness of the insulating plate tS! 1. Since it has a flat shape, it can be printed using normal printing methods! 4,
It completely disappears and becomes a thing. It was a cabinet. Since an optical image pattern is generated by the laser beam t, the pattern of the mask 6 is appropriately reduced by the optical system 6, so that a fine pattern can be created with a very bright NK pattern. 17V, The time required to cauterize the synthetic tree with a laser beam is extremely short, and the conventional ink drying time is not required. J! ! As is clear from the above explanation, the single marking method is non-contact and can be done in a very short time, so it is possible to efficiently add letters, marks, etc. one after another to the completed battery flowing over the twin. I can do it.

Here, ζ will be explained based on a specific embodiment of the tROJI41. The target batteries are 9 batteries, 6 batteries, and 11 batteries.The insulating plate 1s of this is made of black vinyl chloride. aO8 and w6. as V-de oscillators. A gas Rade tube with a mixed gas of wavelength l·, SSO is used.

This is driven by the soo w input. The pattern formed on the mask 6 had a size of 21 x 23 cm.

The optical system 6 is used to reduce the IK of the white part to the insulating plate tSO.
An image was formed on the surface, and the exposure time was set to 1/1000 second.

As a result, a pattern (alphabets and numbers indicating the date of manufacture) was made very clearly on the 15 sides of the black insulating board using a dark yellow color with nine concave and convex patterns.

In addition, the synthetic resin members of the battery to which the present invention is applied are as follows:
Of course, the present invention is not limited to the above-mentioned insulating plate t5, but in the case of other types of external members, the present invention is applied to other synthetic resin members.

As explained in detail above, the battery marking method according to the present invention can be used in a very short time! Arbitrary starting points are formed on the surface of the exterior member of the battery in a non-contact state, and the starting points are minute and clear, and are extremely indelible.

[Brief explanation of drawings]

FIG. 1 is an external view of an Ei5 battery as an example to which the present invention is applied; FIG. 2 is a schematic diagram showing an example of a rounding device for carrying out the marking method of the present invention. 8...Laser oscillator 5111111 ・aa @II・Optical system゛6...
...Mask ti---8...Battery 151@4111+ae...Insulation/plate (synthetic resin member)
Patent applicant: Daikanhachi Fuji Electrochemical Co., Ltd.
Patent Attorney - Kensuke Iro 1st 1st and 2nd illustrations, IC: 327-6 ~70? b

Claims (1)

[Claims] (1) On the surface of the synthetic resin member that makes up part of the battery's exterior case, characters are created using a laser light source and an appropriate optical system. - Forming an optical image such as laser light, and cauterizing and discoloring the synthetic resin in the image area irradiated with the laser beam; Marking the above characters, marks, etc. on the surface rH of the synthetic resin member; A battery marking method featuring: