JPS599873A - storage battery - Google Patents

Abstract

PURPOSE:To prevent a short-circuit to the positive pole strap caused by falling off of active material and/or piling up of sponge lead by a method wherein spacers, whose positive pole strap side is made to be lower than the negative pole strap side, are provided while the projections, which prevent the spacers from floating and are thinner than the thickness of the negative pole strap, are prepared in the position higher than the height of the spacers at the end part of the negative pole strap. CONSTITUTION:The projections 11 preventing the floating of the spacers and having the thickness half of the thickness of the negative pole strap 6 are provided on both ends of said negative pole strap 6. Further, the spacers 8 are step-shaped so that the side of their negative pole strap 6 has the height up to the under surface of said negative pole strap 6 while the side of said positive pole strap 7 has the same height with the upper side of the pole plate surface of the negative pole side plate 4b.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a storage battery with an improved spacer.

A spacer is provided with a portion that extends to the ear portion of the electrode plate, and this portion is secured to the end of the strap.

It has been proposed to prevent the spacer from lifting up.

By the way, one of the causes of short circuits in storage batteries is that sponge lead is deposited on the anode plate and eventually grows to the anode strap, causing a short circuit at the top. In addition, the cathode plate (hereinafter referred to as the 1ion side plate) located at the edge of the colony is generally thinner than the other cathode plates (hereinafter referred to as the cathode center plate), so if the spacer is placed at the edge of the anode plate, If the side of the cathode is also extended, the space volume for the growth of sponge vessels on the cathode side plate is smaller than that on the cathode center plate, so the sponge lead generated on the cathode side plate reaches the anode streak wrap. faster than what originates on the center plate reaches the
There was a point when a short circuit occurred in the core and the life span was reached.

The present invention has been made in view of the above points, and includes a spacer in which the anode strap side is lower than the @ pole strap side in a battery, and a cathode at a position higher than the height of the spacer at the end of the cathode strap. This strap is characterized by having a spacer lifting prevention protrusion that is thinner than the thickness of the strap.

The present invention will be explained below with reference to drawings showing one embodiment thereof. In other words, Figures 1 and 2 are a front cross-sectional view and a main cross-sectional view of the main part, respectively, where 1 is a battery case, 2 is a battery case lid, 3 is a positive handle plate, 4a is a cathode center plate, and 4b is a cathode side. Board, 5 is 7 paleta.

6 is a cathode strap, 7 is an anode strap, 8 is a spacer, 9 is an electrolytic solution, and 10 is a splash-proof plate.

At both ends of the cathode strap 6, anti-lifting protrusions 11 having a thickness half the thickness of the cathode strap 6 are provided. Also, the spacer 8 is connected to its cathode strap 6.
It has a step-like shape with one side having the same height as the lower surface of the cathode strap 6, and the descending strap 7 side having the same height as the upper side of the electrode plate surface of the negative loincloth side plate 4b.

This sail has the above configuration.

It has the following effects.

a. Even if the spacer tries to lift up due to vibrations during transportation or use of the storage battery, the spacer hits the spacer lifting prevention protrusion.

Since the spacer does not rise any further, the active material does not fall off due to the spacer rising, and the capacity does not decrease.

b. A protrusion to prevent spacer lifting is provided at a position higher than the height of the spacer, and a gap is formed between the upper edge of the spacer and the protrusion to prevent spacer lifting, so dimensional errors in the electrode plate, spacer, etc. , the rope plate is not lifted up by the spacer. If the upper edge of the spacer is lower than the upper edge of the separator, the splash-proof plate will shift in the stacking direction of the rope plates, causing a short circuit, so the height of the spacer should be higher than the height of the separator. There is a need. By the way, the gap between the splash-proof plate and the cathode strap is relatively narrow, so if the spacer anti-lifting protrusion has the same thickness as the cathode strap, there is a possibility that the upper edge of the spacer will be lower than the top of the separator. is high. For this reason, in the present invention, the spacer lifting prevention protrusion is made thinner than the thickness of the cathode strap.

It also has a cutout shape at the bottom.

0. Since the deposition strap side of the spacer is configured to be low, the lead generated on the cathode side plate is also deposited on the spacer, and the deposition height of the sponge ship increases rapidly. VIJ Goku Sushi strap never short-circuits.

Although only one embodiment of the present invention has been described in detail above, the present invention can also be applied to a storage battery in which, for example, seven pallets are arranged in a zigzag pattern between the electrode plates, and the outer surface of the cathode side plate is covered. It is also possible to apply this method by lengthening the spacer lifting prevention protrusion accordingly.

The above two NpBs can prolong battery life and prevent capacity reduction, and are of great practical value.

[Brief explanation of the drawing]

Figures 1 and fs2 are a front sectional view and a side sectional view of a main part, respectively, in an embodiment of the present invention. Applicant Yuasa Battery Co., Ltd.

Claims (1)

[Claims] A spacer is provided with the @ electrode strap side lower than the cathode strap side, and at the end of the cathode strap,
A storage battery characterized in that a spacer lifting-prevention protrusion is provided at a position higher than the height of the spacer and is thinner than the thickness of the cathode strap.