JPH0412596Y2 - - Google Patents

Description

[Detailed Description of the Invention] Industrial Application Field The present invention relates to an improvement in the exhaust structure of a sealed storage battery.

Conventional technology and its problems In general, in a cathode plate gas absorption sealed storage battery equipped with an exhaust structure, most of the injected electrolyte is absorbed by the electrode plate and a separator made of fine glass fibers, and free fluid electrolysis occurs. There is no liquid present. Conventionally, the exhaust structure of this type of storage battery has been to either provide a rubber valve to the liquid filler plug in each cell chamber and use it as a dual-use exhaust plug, or to form a common gas collection chamber for each cell chamber on the back side of the battery lid. A structure is known in which an exhaust plug with a rubber valve is provided at one location above the gathering chamber, and a liquid filling plug is provided in each cell chamber. However, all of these have disadvantages in that they have a complicated structure, resulting in poor productivity and disadvantages in terms of cost.

Purpose of the invention The present invention eliminates the above-mentioned drawbacks and provides a sealed storage battery with an extremely simple structure and low cost.

Structure of the invention The present invention is a sealed storage battery having a lid 1, and the lid 1 has cell chamber partition walls 2a, 2b on the back side.
2c, 2d, 2e, and a gas collecting chamber 11, each of the cell chamber partition walls 2a, 2b, 2c, 2d, 2.
e is gas vent 3a, 3b, 3c, 3d, 3e
The gas collecting chamber 11 is closed around the periphery and has an exhaust hole 4 in the lower part and an escape hole 14 in the upper part, and the gas collecting chamber 11 has the partition wall of each cell chamber. 2
a, 2b, 2c, 2d, and 2e, and the gas vent hole 3c of the partition wall 2c is formed of a notch and communicates with the exhaust hole 4 of the gas collecting chamber 11.
At least one inner surface 10 is formed flush with the inner surface 9 of the exhaust hole 4, and each of the other cell chamber partition walls 2
a, 2b, 2d, 2e gas vents 3a, 3b,
3d and 3e are characterized by consisting of notches or through holes.

Embodiment An embodiment of the present invention will be described in detail based on the drawings. FIG. 1 is a perspective view of the back side of the storage battery lid 1 used in the present invention, and each cell chamber partition wall 2a, 2b, 2c, 2d, 2e of the storage battery lid 1 made of polyolefin synthetic resin has a gas groove cut out in a square shape. Ventilation holes 3a, 3b,
3c, 3d, and 3e, and a cylindrical gas collection chamber 11 having an exhaust hole 4 and an escape hole 14 is formed integrally with the partition wall 2c in the center of the storage battery lid 1. Figure 2 shows the battery case 6 used in this invention.
2 is a perspective view of the external appearance, in which a group of electrode plates 8 is inserted into each cell chamber 7 of the battery case 6. FIG. 3 is a partially cutaway view of the storage battery 5 of the present invention, in which the battery case 6 and the lid 1 are thermally welded.

Note that the lid 1 and the battery case 6 are made of the same material.

The storage battery 5 of the present invention is hermetically sealed using the cathode plate gas absorption method, and most of the injected electrolyte is absorbed by the electrode plate and the separator made of fine glass fibers.
Used in the absence of free flowing electrolyte. Also, gas generated from each cell chamber 7 during use of the battery is removed from each gas vent 3a as shown by the arrow in FIG.
3e, the gas passes through the exhaust hole 4 and the gas collection chamber 11 and is discharged from the escape hole 14 to the outside of the battery. FIG. 4 is a sectional view taken along the line A-A' in FIG. 1, and the inner surface 9 of the exhaust hole 4 and the inner surface 10 of at least one of the gas vent holes 3c are formed flush with each other. FIG. 5 is a perspective view of the back side of a storage battery lid 1 showing another embodiment. Gas vent holes 3a, 3b, 3d, and 3e of the storage battery lid 1 are formed by penetrating near the end of the partition wall, and gas collection The chamber 11 is formed similarly to the storage battery lid 1 of the previous embodiment.

Effects of the invention By adopting the above-mentioned structure, the present invention can eliminate the conventional gas collection chamber that is common to each cell chamber, and can reduce the size of the gas collection chamber and simplify the structure, increasing productivity. It is possible to provide a sealed storage battery that has excellent performance and is low in cost. In addition, since the inner surface of the exhaust hole and the inner surface of at least one of the gas vents are formed flush with each other, acid droplets that tend to accumulate in the gas collecting chamber easily flow down into the cell chamber, preventing liquid leakage to the outside of the battery. There is no fear.

[Brief explanation of the drawing]

Fig. 1 is a rear perspective view of the storage battery lid used in the present invention, Fig. 2 is an external perspective view of the battery case, Fig. 3 is a partial cross-sectional view of the storage battery of the invention, and Fig. 4 is A of Fig. 1. -A' is a sectional view, and FIG. 5 is a rear perspective view of a storage battery lid of another embodiment. 1...Storage battery lid, 2a to 2e...Each cell chamber partition of the storage battery lid, 3a to 3e...Gas vent, 4...
Exhaust hole, 9...Inner surface of exhaust hole, 10...Inner surface of gas vent, 11...Gas collection chamber, 14...Escape hole.

Claims (1)

[Claims for Utility Model Registration] A sealed storage battery having a lid 1, the lid 1 having cell chamber partition walls 2a, 2b,
2c, 2d, 2e, and a gas collecting chamber 11, each of the cell chamber partition walls 2a, 2b, 2c, 2d, 2.
e is gas vent 3a, 3b, 3c, 3d, 3e
The gas collecting chamber 11 is closed around the periphery and has an exhaust hole 4 at the lower part and an escape hole 14 at the upper part, Bulkhead 2
a, 2b, 2c, 2d, and 2e, and the gas vent hole 3c of the partition wall 2c is formed of a notch and communicates with the exhaust hole 4 of the gas collecting chamber 11.
At least one inner surface 10 is formed flush with the inner surface 9 of the exhaust hole 4, and the other gas vents 3a, 3b, 3d, 3e of each of the cell chamber partition walls 2a, 2b, 2d, 2e are notched. or a sealed storage battery characterized by having a through hole.