JPH10144341A - Lead acid battery - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a tightly closed type lead acid battery excellent in its resistance against vertical vibration by fixing, with an adhesive, a rib provided on the bottom part of a battery jar and not visible from upside, to the bottom part of a pole plate group. SOLUTION: A rib 6b is provided on the bottom part of a tightly closed type lead acid battery. The tip end of the rib 6b is formed in a wedge shape, for instance, so that a wedge sleeve part may not be visible from upside. Or, it is possible to provide such a configuration that a lateral hole is drilled at the tip end part of the rib so that its inside is not be visible from upside. This rib 6b and bottom part 1a are fixed together by means of an adhesive such as anchor bond 7 or a fixing agent. These rib configurations can be obtained by a punching work process or heating molding, after molding a battery jar made of resin. In this way, the vibration-proofing property of a tightly closed type lead acid battery can be remarkably improved not only in longitudinal and lateral directions but also in vertical direction.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an improvement in a lead storage battery.

2. Description of the Related Art Lead-acid batteries are used for various purposes such as automobiles, portable equipment, and stationary equipment. In recent years, the use of violent vibrations and shocks for motor vehicles such as electric vehicles, water scooters, motocross vehicles, and off-road vehicles has been expanding.

As a method for improving the vibration resistance of a lead storage battery, it has been attempted to provide a rib at the bottom of the battery case as shown in FIG. 1 and fix the rib to the bottom of the electrode plate group with an anchor bond.

[0003] On the other hand, as a battery case material for a lead storage battery, use of a polyolefin-based resin, which is inexpensive in raw material cost, excellent in productivity and light in weight, has become widespread.

[0004]

However, since the polyolefin resin has the property of extremely low adhesive strength with various adhesives, the bottom of the battery case and the bottom of the electrode plate group are anchor-bonded by a conventional method. The method of fixing improves the vibration resistance in the front-rear and left-right directions, but for vertical vibrations, the anchor plates are easily removed from the ribs, so the electrode group is not fixed, and especially vertical vibrations are applied. Was a major challenge.

[0005]

SUMMARY OF THE INVENTION The present invention improves the vertical vibration resistance of a sealed lead-acid battery by providing a rib having a shape having a surface invisible from above at the bottom of the battery case and using an anchor bond. Things.

[0006]

BEST MODE FOR CARRYING OUT THE INVENTION

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below based on embodiments.
2 to 4 show the electrode plate group lower part 1a and the rib 6 provided on the bottom of the battery case.
It is the figure which expanded the joint part (A part of FIG. 1) with a, 6b, 6c. FIG. 2 shows the shape of the rib 6a of the conventional battery, FIG. 3 shows the rib 6b of the first embodiment of the battery of the present invention, and FIG. 4 shows the shape of the rib 6c of another second embodiment of the battery of the present invention. In FIG. 3, the tip of the rib has a wedge shape, and the skirt portion of the wedge is invisible from the upper portion. In FIG. 4, a hole 8 is provided in a part of the rib in the lateral direction, and the hole 8 has a shape that cannot be seen from above. It is difficult to form the rib shape as shown here at the time of molding the battery case, and it is necessary to perform punching or heat molding after molding. Anchor bond 7 is attached to the rib at the bottom of the battery case of these batteries.
Is applied and fixed to the lower portion 1a of the electrode plate group, so that the anchor bond can be prevented from coming off in the upward direction.

A sealed lead-acid battery was assembled using a polyolefin resin battery case having a rib having the shape shown in FIG. 3 of the first embodiment at the bottom of the battery case and subjected to a vibration test. The reason for using the sealed type is that a non-sealed type battery containing a large amount of electrolyte is disadvantageous in terms of condition because the weight of the electrode group is reduced by the buoyancy of the electrolyte and the electrode group is less likely to be damaged by vibration. A sealed battery was used.

The condition of the vibration test is that the frequency is swept up and down at an acceleration of 10 G from 15 Hz to 200 Hz in 15 minutes. For comparison, a conventional product was also subjected to a vibration test. Fig. 5 shows the transition of battery open circuit voltage during vibration.
Shown in In the conventional product, a remarkable voltage drop occurred in 1 hour and 10 minutes, and the battery voltage became 0V. The product of the present invention was subjected to a vibration test up to 10 hours, but there was no change in the open circuit voltage. When these were disassembled and inspected after the test, the inside of the battery was disconnected due to vibration, but the product of the present invention showed no abnormality. The same test was performed for the second example, but the same results as in the first example were obtained.

[0009]

As described in detail above, a sealed lead-acid battery having extremely excellent vibration resistance is provided by fixing a rib having a shape having a surface that cannot be seen from above to the bottom of the battery case and the electrode plate group. And its industrial value is enormous.

[Brief description of the drawings]

FIG. 1 is a schematic diagram showing the internal structure of a sealed lead-acid battery.

FIG. 2 is an enlarged schematic view of a main part of a bottom portion of a battery case according to a conventional technique.

FIG. 3 is an enlarged schematic view of a main part of the bottom of the battery case showing the first embodiment according to the present invention.

FIG. 4 is an enlarged schematic view of a main part of a bottom part of a battery case showing a second embodiment according to the present invention.

FIG. 5 is a characteristic diagram showing a comparison of changes in open circuit voltage between a conventional battery and a battery of the present invention during a vibration test in an example according to the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Electrode group 2 Battery case 3 Terminal pole 4 Cell connection part 5 Terminal 6 Battery case bottom rib 7 Anchor bond 8 Side hole

Claims (1)

[Claims] 1. A lead characterized in that a rib having a shape having a surface that cannot be seen from above is provided at the bottom of the battery case, and the rib and the bottom of the electrode plate group are fixed using an adhesive or a fixing agent. Storage battery.