JPH04104455A - Sealed lead-acid battery - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to an improvement in a thin sealed lead-acid battery used particularly as a power source for portable equipment and the like.

2. Description of the Related Art Conventionally, when seed batteries are stacked to form an assembled battery, each middle battery is bound by wrapping tape or the like when stacking each battery.

Problems to be Solved by the Invention Compared to other devices, power supplies used in portable devices and the like are required to have shock resistance such as vibration resistance and drop resistance. This is because it may be caused by vibrations in the luggage compartment of the automobile or by falling during transportation.

In the conventional structure, the stacked cells are wrapped with tape or the like while they are in a stacked state, so when an impact is applied to each cell, the electrical connections between the cells are strained.
In the worst case, the connection will break.

Means for Solving the Problem At least a part of the heat-adhering portion of the battery case made of a synthetic resin film or sheet around the electrode plate group is integrated with each battery.

Even when subjected to action and shock, the positional relationship between the cells does not change.

Example An embodiment of the present invention will be described.

An electrode plate group 4 in which an anode plate 1 and a cathode plate 2 are arranged facing each other with 11 glass fibers and a separator 3 in the shape of a pine tree 1 is sandwiched between two films 5 mainly made of polypropylene. A battery case is formed by thermally welding the films 5 around the electrode plate group 4 to each other, and a unit cell is produced. Next, the heat-welded parts 6 of the individual cells obtained by stacking the cells thus obtained are bonded to each other and integrated. A unit cell with such a structure is prevented from shifting due to an impact or the like. 7 is the adhesive part. Although an adhesive is used to bond the thermally welded parts 6 together, there is no problem in using means such as thermal welding as long as the connection strength targeted by the present invention can be obtained.

Next, a sealed lead-acid battery of the present invention and a sealed lead-acid battery with a conventional structure were manufactured, and a concrete 1.
Table 1 shows the results of a drop on the floor.

Table 1 From Table 1 above, compared to the conventional sealed lead-acid battery whose inter-cell connection was damaged by the 5th drop, the sealed lead-acid battery of the present invention withstood the 155th drop.

Effects of the Invention As described above, the present invention has great industrial value, such as being able to exhibit stable performance even when a sealed lead acid battery is accidentally dropped as a power source for Hawk Bull equipment, etc.

[Brief explanation of drawings]

The drawing is a sectional view of the sealed lead acid battery of the present invention. 1 is an anode plate, 2 is a cathode plate, 3 is a separator, 4 is a group of electrode plates, 5 is a film, 6 is a heat welding part, 7 is an adhesive part

Claims (1)

[Claims] An electrode group consisting of a positive electrode plate, a negative electrode plate, and a separator is sandwiched between two acid-resistant and heat-weldable film-like or sheet-like synthetic resin bodies, and the synthetic resin bodies around the electrode plate group are heat-welded to each other. 1. A sealed lead-acid battery in which a battery case is formed by stacking sealed lead-acid batteries, characterized in that at least a portion of the heat-welded parts of the stacked batteries are bonded or heat-welded to each other to be integrated.