SE457180B - SET FOR MAKE A BATTERY OF FLAT CELLS WITH METAL TERMINAL - Google Patents

Description

457 180 10 15 20 25 30 35 2 briquettes, these can advantageously be rounded in the corners.

In view of the fact that the rutile carbon briquettes can expand, they are about 0.06-0.08 mm narrower than the metal terminal when inserted.

The invention will be explained in more detail in the following with reference to the accompanying drawing, in which Fig. 1 shows a part of a battery, showing a bushing to a metal terminal which is in contact with a rutile-carbon briquette, and Fig. 2 shows the metal terminal itself.

The alkaline battery shown in Fig. 1 consists of a number of flat cells stacked on top of each other. The individual cell contains a zinc anode, an alkaline electrolyte and a cathode in the form of a rutile-carbon briquette 1. The lignite-carbon briquette is in contact with a metal terminal 2.

However, a satisfactory contact must be made between the rutile-carbon briquette 1 and the metal terminal 2, since this connection is decisive for the short-circuit current. If you use a square terminal with bends along all four edges, the bends would bend outwards and the connection would be insufficient. According to the invention, use has been made of a bent piece of metal - see Fig. 2 - with bends along two opposite edges, which bends turn about 1-3 ° inwards. In this case a sufficiently good clamping of the rut-carbon briquette 1 is achieved. The terminal 2 must of course be of a sufficiently resilient material, such as nickel-plated iron. In this case a short-circuit current of 3-5 A is achieved. In the earlier round cells this problem was not encountered at all, since the electrode mass in question was introduced under pressure and thereby made the necessary contact, taking advantage of the fact that the cylindrical body was capable. to absorb the pressure in question, without it affecting the contact.

The method according to the invention is furthermore suitable for mass production, since the terminal body is symmetrical, and the heat-carbon briquettes can be pushed in from the side, if they are rounded in the corners.

The terminal may be equipped with an additional bend 4, whereby a certain contact can also be achieved at the bottom surface. The briquettes have a width that is approximately 0.06-0.08 mm smaller than the terminal, so that it is taken into account that the briquettes expand slightly as a result of the release of stresses during electrolyte addition.

In a concrete embodiment, the terminal has a height of 2.7 mm, a length of 17.5 mm and a width of 13.8 mm.

The material thickness is about 0.1-0.3 mm.

Claims (4)

457 180 PATENT REQUIREMENTS A method of manufacturing a battery consisting of stacked flat cells, containing a zinc anode, an alkaline electrolyte and a cathode in the form of a rutile-carbon briquette (1), which abuts against one side of a metal terminal (2) in the form of a plate with two opposite edges, bending towards the briquette, characterized in that the briquette (1) is fastened to the negative metal terminal (2) by clamping action along said two opposite bent-up edges of this terminal, between which edges the briquette is inserted from one open end of the plate. 2. A method according to claim 1, characterized in that said two opposite edges of the metal terminal (2) are bent slightly more than 90 °. 3. A method according to claim 2, characterized in that said two opposite edges of the metal terminal (2) are bent 1-3 ° more than 90 °. 4. A method according to any one of claims 1-3, characterized by an additional bend (4) of about 90 ”of the outermost parts on the bent edges of the metal terminal X2).