JPH0515724Y2 - - Google Patents

Description

[Detailed description of the invention] Industrial application field The present invention relates to an improvement of a sealed lead-acid battery.

Conventional technology Conventionally, sealed lead-acid batteries have characteristics such as no leakage of electrolyte during use, a function to absorb oxygen gas generated from the positive electrode at the negative electrode during charging, and no gas discharge outside the battery. ing. In order to provide the above characteristics, dilute sulfuric acid, which is an electrolytic solution, is gelled with silica gel or alumina sol to make it non-fluid. On the other hand, a safety valve is provided to prevent rupture due to sudden gas generation due to overcharging, etc., which would cause the internal pressure of the battery to rise.

Problems that the invention aims to solve Generally, when a gel is subjected to vibration, it turns into a sol and becomes fluid. For this reason, when the above batteries are placed horizontally and vibrations are applied, the gel electrolyte becomes a sol and flows into the safety valve, obstructing the safety valve's operation.This also causes deterioration of the safety valve, resulting in liquid loss due to poor sealing and oxidation of the cathode plate. It has the problem of causing

Means for Solving the Problems The present invention solves the above problems and further improves the safety of the battery. It is characterized by being filled with a sticky cotton material.

Function The present invention has the above-mentioned features, and by holding the gel that becomes a sol due to vibration and making the electrolyte non-fluid, it is possible to prevent the safety valve from being inhibited from operating or deteriorating.

Example An embodiment of the present invention will be described with reference to the drawings.

As shown in FIG. 2, after inserting the plate group 1 into the battery case 2, acrylic wool 3 is stuffed between the battery case and the plate group 1 using the inserter 4. Once you have inserted it all the way to the top of electrode group 1, close the lid.

Then, an electrolytic solution consisting of silica sol and sulfuric acid is mixed and injected to form a gel. This causes the battery to
As shown in FIG. 1, in addition to the gel held on the electrode plate group 1, all the gel between the electrode plate group 1 and the battery case 2 can be held with the acrylic wool 3. Therefore, the frequency
Even when a strong vibration of 20 Hz, amplitude of 3 cm, and acceleration of 3 G is applied, the gel electrolyte is difficult to become a sol, and even if it becomes a sol, it is held by the acrylic wool 3 and does not flow. Further, elongation of the anode plate is a major factor in battery life, but since the acrylic wool 3 is elastic, even if the anode plate stretches, it does not press the anode plate and does not affect battery life.
Note that 5 is a safety valve provided on the lid 6 of the battery.

Effects of the invention As mentioned above, the invention uses an acid-resistant and elastic cotton-like material such as acrylic wool to fill between the electrode plate group and the battery case, thereby reducing the gel electrolyte in this area. Because it can be retained, the gel electrolyte does not flow inside the battery even if the battery is subjected to vibration. This prevents electrolyte from flowing into the safety valve even if the battery is subjected to vibrations in any installation state, which prevents the safety valve from interfering with its operation or deteriorating.It has great practical value in that it further improves the sealing and safety of the battery. It is a big thing.

[Brief explanation of the drawing]

FIG. 1 is an explanatory diagram of a sealed lead-acid battery showing an embodiment of the present invention, and FIG. 2 is an explanatory diagram of its manufacturing state. 1... Plate group, 2... Battery case, 3... Acrylic wool, 4... Inserter, 5... Safety valve.

Claims (1)

[Scope of utility model registration request] A closed type, which is made by filling an acid-resistant and elastic cotton-like material such as acrylic wool between the electrode plate group consisting of the positive electrode, negative electrode, gel electrolyte, its holder, and separator, and the battery case. Lead acid battery.