JPH0431737Y2 - - Google Patents

Description

[Detailed Description of the Invention] Industrial Application Field The present invention relates to improvements in safety valves for sealed storage batteries, particularly small storage batteries, used as power sources for portable equipment and the like.

BACKGROUND ART Conventionally, a safety valve for a sealed storage battery of this type has a structure as shown in FIG. In Figure 3, 1
0 is a sheet-like rubber valve, 11 is a cushion material, 1
2 is a holding plate, which is attached to the recess 5 of the battery case 1,
It constitutes a safety valve that always closes an exhaust port 6 opened at the bottom of the recess 5. To attach these to the recess of the battery case, the valve 10, cushion material 11, presser material 1
A method was adopted in which 2 were incorporated one after the other.

Problems that the invention attempts to solve This conventional configuration has the following problems. (1) The parts are small and insertion work is not easy. In other words, it takes a lot of man-hours. (2) There are many parts, which requires a lot of management time. (3) There are variations in the dimensional accuracy of parts. (4) It is difficult to automate valve installation.

The present invention solves these problems.

Means for solving the problem In order to solve this problem, the present invention consists of three parts: a sheet rubber valve, a cushion material,
The presser plate is attached in advance with adhesive to form a single piece. The method of unifying the parts is to attach three reasonably large sheet-like parts with adhesive, and then punch them out at once using a five-plate tooth pattern, which improves dimensional accuracy.

Effect: With this configuration, the rubber valve, the cushion material, and the presser plate can be easily attached, and the quality of the valve body is stable, and a sealed storage battery with constant performance can be obtained.

Embodiments Hereinafter, embodiments of the present invention will be described with reference to FIGS. 1 and 2.

1 is a battery case, and a frame body 2 made of heat-fusible resin
and side plates 3 and 4 thermally welded to both sides thereof. A recess 5 is provided on the top surface of the battery case, and an exhaust port 6 communicating with the inside of the cell is open at the bottom of the recess 5. Further, on the opening edge of the recess 5, a protrusion 7, which will be described later, prevents the presser plate from coming off.
8 is provided.

9 is a sheet-like rubber valve 1 that blocks the exhaust port 6;
0, a cushion material 11 made of sponge or the like that elastically presses the rubber valve 10, and a valve body made by integrating these materials with a pressing plate 12 from above using an adhesive. This valve body is made by pasting together three sheet-like materials with adhesive and then punching them out to a predetermined size.

To explain the structure of this battery in detail, inside the frame 2, there are a positive electrode plate 13 having a pole column part 13a, a separator 14, and a negative electrode plate 15 having a pole column part 15a.
By heat welding side plates 3 and 4 made of rigid metal to both sides of the frame body 2, on which a heat-fusible resin layer is provided by pasting a heat-fusible resin film on the inner surface. It is closed.

In addition, on the upper side surface of the frame 2, there are pole portions 13a,
Recesses 16 and 17 are provided for fitting 15a,
No resin layer is formed on the inner surfaces of the side plates 3 and 4 corresponding to these parts. Therefore, the side plates 3 and 4 are in contact with the pole pillars, respectively, and serve as a positive terminal and a negative terminal. Further, the electrode plates 13 and 15 are made of a lead alloy grid integrated with the pole column portion and coated with a paste-like active material.

After configuring the sealed electrode containing the electrode plate group as described above, the electrolyte is injected into the cell from the exhaust port 6, and then the valve body 9 is pushed into the recess 5 on the top surface of the battery case, and the end of the holding plate 12 is closed. By bringing the parts into contact with the lower surfaces of the protrusions 7 and 8, a sealed storage battery is completed.

The size of this battery is, for example, 17 mm wide and 6 mm thick.
mm, height 67mm, capacity is approx. at 10 hour rate discharge.
It is 300mAh.

By using a valve body that integrates three parts as described above, the approximately 30 seconds it would take to assemble the three parts individually could be reduced to 1/3. Also,
Since it is assembled into one valve body, automatic assembly by a machine is also possible.

Effects of the Invention According to the present invention, not only is it easier to attach the valve body, but also the accuracy of parts is improved, and a sealed storage battery with constant performance can be obtained.

[Brief explanation of the drawing]

FIG. 1 is an exploded perspective view showing the main parts of a battery according to the present invention, FIG. 2 is an exploded perspective view showing the overall structure of the battery, and FIG. 3 is an exploded perspective view of the main parts of a conventional battery. 1...Battery case, 5...Recess, 6...Exhaust port, 10
... Valve, 11 ... Cushion material, 12 ... Holding plate.

Claims (1)

[Scope of utility model registration request] A recess is provided on the top surface of the battery case, an exhaust port is opened in the recess, a sheet-shaped valve is used to block the exhaust port, a cushion material is elastically pressurized to the valve, and a presser foot is used to press the cushion material from above. A sealed storage battery in which a plate is integrated with an adhesive and installed in the recess.