JPH0351884Y2 - - Google Patents

Description

[Detailed Description of the Invention] Industrial Field of Application The present invention relates to a sealed lead-acid battery that is equipped with a cap-shaped rubber valve on the valve cylinder of the exhaust section to isolate the inside and outside of the battery.

Conventional technology Sealed lead-acid batteries retain electrolyte in a gelled state or impregnated with thin glass fiber non-woven fabric, and absorb oxygen gas generated during charging with a cathode plate, thereby removing the electrolyte from the cathode. In addition to preventing this from occurring, it also achieves hermetic sealing. At the same time, a rubber valve is mainly used to isolate the outside from the inside of the battery. The rubber valve part generally used in sealed lead-acid batteries is as shown in Figure 3, in which a rubber valve 2 whose inner dimensions are slightly smaller is placed over a valve cylinder 1 molded into the battery container. There is. In the battery production process, a rubber valve is attached manually or automatically after electrolyte is injected.

Problems that the invention aims to solve: In the automatic rubber valve mounting machine, equipment errors (misalignment, diagonal mounting) of rubber valves occurred, and when manually mounting the valves, the rubber valves were often forgotten to be mounted.

Means for Solving the Problems The present invention solves the above problems and provides a method to prevent mistakes in the installation of rubber valves.In this invention, a cap-shaped rubber valve is attached to the valve cylinder of the exhaust section to allow internal and external connections between the inside and outside of the battery. In a sealed lead-acid battery that is shut off, the entire exhaust section is
It is covered with an upper lid, and the upper lid has a bar-shaped protrusion on its lower surface, and the exhaust part has a surrounding wall and a storage part for the protrusion around the side wall of the rubber valve. and the protrusion has a thickness that is greater than or equal to the distance between the peripheral wall and the side wall of the rubber valve and less than or equal to the distance between the peripheral wall and the side wall of the valve barrel. Features.

Function: The present invention has the above-mentioned features, so that when installing the top cover, it is possible to check whether or not the internal rubber valves are installed in all cases, depending on whether or not the protrusion is present only in the storage section.

Example An embodiment of the present invention will be described.

Fig. 1 is a horizontal sectional view of the present invention, and Fig. 2 is a vertical sectional view, in which a protrusion 4, which is a feature of the present invention, is formed on the top cover 3, and a rubber valve 2 is placed over the valve barrel 1 at the top of the battery case. A protrusion 4 is set at a position where it contacts. However, since the distance between the valve cylinder 1 and its surrounding wall 5 is narrow, when the rubber valve 2 is covered, the top cover 3 cannot be formed unless the protrusion 4 enters the storage recess 6 at the top of the battery case. Therefore, when the top cover 3 is installed in the state shown in Figure 2, if the rubber valve 2 is not available, the top cover 3 can be removed by rotating the circular top cover 3 around the valve barrel.
can be rotated. This indicates that there is no rubber valve, so you can easily check whether a rubber valve is installed.

Effects of the invention As described above, the present invention has extremely great practical value in that it can easily determine the presence or absence of an internal rubber valve after installing the top cover, and eliminate product defects.

[Brief explanation of drawings]

FIGS. 1 and 2 are a cross-sectional view and a vertical cross-sectional view of a main part showing an embodiment of the present invention, respectively, and FIG. 3 is a vertical cross-sectional view of a main part showing a conventional sealed lead-acid battery. 1 is a valve barrel, 2 is a rubber valve, 3 is an upper lid, 4 is a protrusion, 5 is a surrounding wall, and 6 is a storage recess.

Claims (1)

[Scope of Claim for Utility Model Registration] A sealed lead-acid battery in which a cap-shaped rubber valve is attached to the valve cylinder of the exhaust section to isolate the inside and outside of the battery, the entire exhaust section being covered with a top lid, The upper lid has a rod-shaped protrusion on its lower surface, the exhaust part has a surrounding wall around the side wall of the rubber valve, and a storage part for the protrusion, The protrusion has a thickness that is greater than or equal to the distance between the peripheral wall and the side wall of the rubber valve and less than or equal to the distance between the peripheral wall and the side wall of the valve barrel. Lead acid battery.