JPH0447902Y2 - - Google Patents

Description

[Detailed Description of the Invention] Industrial Application Field The present invention relates to improvements in monoblock sealed lead-acid batteries, and in particular to the structure of the exhaust valve.

Conventional technology and its problems In recent years, small sealed lead-acid batteries have come into widespread use in electronic devices and backup power supplies, but with advances in electronic devices, power consumption has become extremely low. Along with this, batteries have also become smaller. As is well known, in sealed lead-acid batteries, the electrolyte is made into a gel, or the so-called retainer type is used in which only the porous separator and positive and negative electrode plates are impregnated with the electrolyte, and the oxygen gas generated at the positive electrode during charging is removed. A commonly used method is to make it easier to diffuse into the negative electrode and absorb it at the negative electrode. In this case, when air enters the battery, the negative electrode is oxidized by oxygen in the air, reducing battery performance. Therefore, when the amount of gas generated increases and the inside of the battery becomes pressurized, such as when charging with a large current, the gas is released to the outside of the battery, but in other conditions, the gas outside the battery is released into the battery. A so-called check valve is used that prevents water from entering. Further, this check valve has a structure using a ring-shaped elastic body as shown in FIG. 2. However, even as batteries become smaller, check valves with the structure shown in Figure 2 still need to be installed in each cell one by one.Furthermore, with very small batteries, the installation process becomes difficult. It was hot.

Means for Solving the Problems The present invention has an exhaust hole on the side of the exhaust pipe provided for each cell, and a common ring-shaped elastic body spans at least two exhaust pipes. The exhaust hole is sealed by the tensile force of a ring-shaped elastic body to maintain airtightness.
With this structure, the present invention aims to eliminate the drawbacks of the conventional check valve and provide a check valve having a structure suitable for a monoblock sealed lead-acid battery.

EXAMPLE Next, the monoblock sealed lead-acid battery of the present invention will be explained based on the drawings.

FIG. 1 is a schematic diagram of a check valve section showing an embodiment of the monoblock sealed lead-acid battery of the present invention, in which 1 is a ring-shaped elastic body, 2 is an exhaust hole, and 3 is an exhaust hole provided for each cell of the battery. It is a cylinder. The exhaust hole 2 is provided on the side of the exhaust pipe 3.

a is when two exhaust holes are blocked using one ring-shaped elastic body, b is when four exhaust holes are blocked, and c is when three exhaust holes are blocked by making the ring-shaped elastic body meander. This is the case. By combining these, it is possible to close any number of exhaust holes with one ring-shaped elastic body.

Effects of the invention As described above, the invention uses the same principle as the conventionally used ring-type check valve, which uses the tension of a ring-shaped elastic body to perform exhaust and blockage, so it has a high In addition to being reliable, the number of elastic bodies that make up the check valve can be greatly reduced even though it is a monoblock battery case, and the structure is simple, reducing manufacturing costs. Excellent effects such as being able to obtain a check valve suitable for lead-acid batteries can be achieved.

[Brief explanation of the drawing]

FIG. 1 is a schematic diagram of a check valve section showing an embodiment of the monoblock sealed lead-acid battery of the present invention, and FIG. 2 is a schematic diagram of a check valve conventionally used in sealed lead-acid batteries. 1... Ring-shaped elastic body, 2... Exhaust hole, 3...
Exhaust pipe.

Claims (1)

[Scope of Claim for Utility Model Registration] A monoblock sealed lead-acid battery consisting of a plurality of cells each having an exhaust pipe 3, each exhaust pipe 3 having an exhaust hole 2 on the side, each exhaust hole 2 is a monoblock type sealed lead-acid battery that is sealed by the tension of a common ring-shaped elastic body 1, and the ring-shaped elastic body 1 is spanned over at least two exhaust pipes.