DE2324254A1 - GALVANIC PRIMARY CELL - Google Patents

Description

Reg.-No .: PP 175-DT 6233 Kelkheim, 8 May 1973

EAP-Ksr / Ki

VARTA Batterie Aktiengesellschaft 3 Hannover, Stöckener Strasse 351

Galvanic primary cell

The invention relates to a galvanic primary cell in a cylindrical Shape with a positive pole protruding on one end face and a negative pole arranged on the opposite end face and a guarantee strip covering one pole of the cell in an electrically insulating manner,

Numerous designs of guarantee closures are known, which should give the buyer of a battery a guarantee for an unused battery.

In a number of such arrangements -you will find the guarantee strip as coherent whole with a thermoplastic plastic disc covering the end face of the primary cell (FR-PS 1556 324). Also the one-piece design of guarantee strips with what is known as a primary cell enveloping A plastic bell has been proposed in various solutions (DT-OS 1 671 720).

In most of these designs, the battery buyer has to use a knife or the like to seal the guarantee Remove the injection point or corresponding bars that should prevent uncontrolled use. Different Constructions work with predetermined breaking points, which should save the use of aids. Here, however, exists also the risk that predetermined breaking points already when handling the cells, such. B. on transport or when selling

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break unintentionally and lead to anger and misunderstanding.

In the case of primary cells with a flanged metal casing, a membrane-like cover covering the entire end face is attached Plastic film coating known (DT-OS 1 939 474), and the crimping of a guarantee strip covering the polar cap between the outer edge of the polar cap and insulating sleeve, the Metal casing (DT-PS 1 421 541).

The last-mentioned embodiments have, among other things, the disadvantage that, for example, the Protective film adhered to the outer edge either not immediately recognized by the buyer as a guarantee seal to be removed, or is only partially removed due to the difficult solvability, which in both cases leads to complications during assembly of a device with a battery set usually consisting of several primary cells.

If a guarantee strip covering the polar cap with the metal casing is crimped, the disadvantage arises that as a result of the manufacturing tolerances in the crimping operation, an uneven Attachment of the warranty strip can occur. If the flare is too tight, the guarantee strip can already During the manufacture of the primary cell in the automatic assembly machine, tear, or at least partially be injured. One less tight beading of the primary element causes insufficient attachment, so that the strip is before use when Customer can solve and is ineffective as a guarantee lock.

Another disadvantage is that the flanging of the metal casing usually "also the contact between the positive pole of the built-in negative solution electrode in the cup Primary cell and the negative contact disc arranged on the bottom of the same ensures. To be sure, if the crimping pressure is too low when assembling the primary cell, this would reduce the risk of damage of the guarantee strip, but possibly adversely affect the contact security.

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232425A -f-

The object of the invention is an improved guarantee lock for round primary cells that is independent of the mechanical effects attached simply, reliably and effectively during the assembly operations of the primary cells, and visually for the buyer conspicuous and easy without additional tools before using the Primary cell can be removed.

This object is achieved according to the invention in that the guarantee strip is sealed onto an end face of the cell or is glued on.

The guarantee strip made of paper, made of a paper-plastic sandwich or a paper-plastic-metal foil combination or made of plastic is over the positive contact cap or the negative contact disc arranged isolating and for the purpose of lighter. Provide removability with an additional handle end before use.

Primary elements with a cylindrical design have a centrally arranged and protruding positive contact on one of the two end faces, which is designed in one piece in the form of a so-called paddling cap made of metal. In other versions, the protruding one is Part of the positive contact made of metal, while the adjoining circular ring surface is made of a separate disc made of metal or Made of plastic, or a combination of both, and enclosed by the enclosing cell jacket made of metal or plastic (crimped) is.

As mentioned, the guarantee strip according to the invention is arranged insulated over the protruding contact and is sealed on the circular ring surface at one or more points at the same time by means of contact heat without additional adhesives. The seal is usually achieved by a commercially available one-sided coating of the guarantee strip on the basis of z. B. polyvinyl acetate, polyvinylidene chloride, polyethylene allows. On ^! the front sides

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of the primary element can also be used before the sealing operation Contact adhesive can be applied in dots, which increases the sealing speed or, in the case of profiled end faces, can serve as level compensation for the sealing stamp.

The same effect is also achieved with adhesives, whereby a sealable coating of the guarantee strip is dispensed with can.

The guarantee strip is usually automatically cut to length from the roll in the form of a tape and at the same time on the face of the Primary cell positioned and sealed. With an alternative solution the strip can also be positioned as a blank from the stack like a label and sealed or glued. As one Another option is to manufacture the guarantee strip as a thermoplastic injection-molded part and use heat or through Gluing can be applied. Finally, the guarantee strip can be in the form of a sealable, coated and stamped metal foil similar to tin cans with a zip fastener on the front of the battery to be arranged in an insulating manner. The guarantee strip can also be printed in one or more colors.

Various exemplary embodiments of the invention are explained below with reference to FIGS. 1-8.

FIG. 1 is a partial section of a galvanic primary cell with one on the circular ring surface of the positive contact Guarantee strips attached to the front.

Figure 2 shows the guarantee strip according to Figure 1 in perspective View.

Figure 3 shows a guarantee strip attached to the shoulder of the primary cell enclosure.

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Figures 4 and 5 show a guarantee strip with an elongated one Handle end.

FIGS. 6 and 7 show a guarantee strip injection-molded from thermoplastic with handle end.

Figure 8 shows a guarantee strip on the negative contact side on the bottom of the primary cell.

In Figures 1 and 2, the guarantee strip 1 is on the front side the primary cell 2 * shown. The positive contact part 3 of the flange cap 4 projects over the annular sealing surface emerged. The cell casing 6 is flanged in a form-fitting manner with the insulating sleeve 7 which tightly encloses the galvanic cell made of paper or plastic. The cell insulation 8 consists, for example, of bitumen. The negative zinc electrode is with 9, the positive electrode with 10 and its lead with 11 designated.

Figure 3 shows the guarantee strip 12 on the shoulder is sealed or glued to the flanged cell envelope.

In the Piguren 4 and 5 the guarantee strip 14 is with a extended handle part 15 shown on the end face of the primary cell.

In Figures 6 and 7, the guarantee strip 16 'is thermoplastic Injection molded part made of insulating plastic, which has the extended handle part 17. The possible Sealing or adhesive surfaces are denoted by 18.

In Figure 8 i. The guarantee strip 19 is on the negative contact side 20 of the primary cell 2 with the positive contact 3 is shown.

- Claims 409848/0627

Claims (7)

Registration number. PP 175 DT 6233 Kelkheim / Ts., September 4, 1973 EAP-Fri / HH Patent claims 1. Galvanic primary cell in cylindrical shape with a on one end protruding positive pole and arranged on the opposite end face negative pole and a guarantee strip covering one pole of the row in an electrically insulating manner, characterized in that that the guarantee strip is on one face of the cell is sealed or glued on. z. Galvanic primary cell according to Claim 1, characterized in that the guarantee strip has at least one handle end projecting beyond the circumference of the line. 3. Galvanic primary ze lie according to claims 1 and 2, thereby characterized in that the guarantee strip on the annular surface surrounding the protruding positive pole is sealed or glued. 4. Galvanic primary element according to claims 1 and 2, characterized in that the guarantee strip was on the the shoulder of the cell envelope enclosing the end face is sealed or glued on. 5. Galvanic primary element according to claims 1 to 4, characterized in that the guarantee strip consists of a film made of J ^ apiei-, plastic, metal, ΐextiigewebe or from a combination of two or more of the above. Materials is made. 409848/0627 _2- 6. Galvanisch.es primary element according to claims 1 to 4, characterized in that the guarantee strip is an injection-molded part from thermoplastic material. 7. Galvanic primary element according to claims 1 to 6, characterized in that the guarantee strip or is printed in multiple colors or is unprinted, 409848/0627