JPS6035964Y2 - alkaline battery separator - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to an improvement of a separator for an alkaline secondary battery.

In general, separators for nickel and zinc secondary batteries, as shown in Figure 1, have an isolation layer made of cellophane as the center and nine electrolyte-impregnated layers made of synthetic leather or non-woven fabric of natural fibers attached to both sides. A three-layer laminate separator is used, but with such a separator, the gas generated during charging and discharging stagnates on the electrode surface or in the electrolyte-impregnated layer, and is insufficiently discharged outside the electrode reaction surface. There was a problem in that battery characteristics deteriorated due to non-uniform electrolyte and current distribution.

The present invention has been improved in view of the above points, in which a microporous film is interposed between a pair of nonwoven fabrics made of synthetic leather or natural fibers, and synthetic resin wires are placed at intervals on both sides of the film. They are characterized in that they are arranged in parallel to form a three-layer separator.

Examples thereof will be explained below with reference to FIG. 2. 1.1 is a nonwoven fabric made of polyamide/polyolefin fibers;
2 is a microporous polypropylene film, and 3 is a wire made of polyamide/polyolefin resin. This three-layer separator S is produced by the apparatus shown in FIG.

That is, 4 is a pair of supply rollers having grooves into which the wire rods 3 fit, and attach the wire rods 3 at a predetermined interval to both upper and lower surfaces of the microporous film 2 moving in the direction of the arrow.

Reference numerals 5 and 5 denote application rollers for adhesive such as starch material, which apply the adhesive to the inner surfaces of the pair of sent-out nonwoven fabrics 1. It is attached to the top and bottom surfaces of the adhesive film 2.

Figure 4 shows a battery using such a separator.
8 is a battery case, 8 is a nickel anode, and 9 is a zinc cathode. The separator S is closely inserted between both electrodes 8 and 9 so that the wire 3 between the microporous film 2 and the nonwoven fabric 1 is in the vertical direction.

According to the present invention, synthetic resin wires are arranged parallel to each other with a gap between the microporous film in the three-layer separator and the nonwoven fabric on both sides of the film. A penetrating space is formed and the electrolyte and gas can be easily replaced. Therefore, the generated gas does not stagnate inside the separator or on the electrode surface, but is led upward through this space and reaches the electrode reaction surface. It has the advantage that it can be quickly removed from the battery to prevent deterioration of battery characteristics.

[Brief explanation of the drawing]

Figure 1 is a sectional view of a conventional three-layer separator, Figure 2 is a sectional view of a three-layer separator of the present invention, Figure 3 is a diagram showing an example of making the above separator, and Figure 4 is a diagram of a battery using the above separator. FIG. 1... Non-woven fabric, 2... Microporous film, 3... Synthetic resin wire.

Claims (1)

[Scope of utility model registration request] A microporous film is interposed between a pair of nonwoven fabrics made of synthetic leather or natural fibers, and wires made of synthetic leather are arranged in parallel at intervals on both sides of the microporous film. Alkaline battery separator.