JPH0339884Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Field of Application] This invention relates to batteries, particularly sealed batteries.

[Conventional technology]

Sealed batteries generally include a valve mechanism that releases gas to the outside and reseals the battery when the internal pressure of the battery rises abnormally.

Conventionally, as this type of sealed battery, there is one shown in FIG.

This device includes a cathode terminal bottomed cylinder 31 and an insulating packing 32 at the opening of the cathode terminal bottomed cylinder 31.
In the battery chamber 35 surrounded by the lid plate 33 covered through the lid plate 33, the anode terminal cap 34 fixed to the upper surface of the lid plate 33, the cathode terminal bottomed cylinder 31, and the lid plate 33. The power generating element body 42 is housed, the elastic valve body 39 is housed in the valve chamber 36 surrounded by the anode terminal cap 34 and the cover plate 33, and closes the ventilation hole 37 formed in the cover plate 33, and Valve body 39
and a spring 41 that presses through the seat plate 40, a ventilation hole 38 is formed in the anode terminal cap 34, and an anode lead plate 43 of the power generating element body 42 is welded to the cover plate 33. .

[Problem that the invention attempts to solve]

However, in the above battery, the spring 41
Since the coil spring is expensive, there is a problem in that the cost of the battery is high.

Furthermore, since the part of the cover plate 33 where the anode lead plate 43 is spot-welded is on the back side of the elastic valve body 39, the elastic valve body 39 is welded to the cover plate 33 by the high temperature of welding.
There was a risk that the product would be burned into the product.

Therefore, the present invention aims to provide a battery having a structure that does not use a coil spring and does not cause the risk of burning the elastic valve body due to spot welding of the anode lead plate.

[Means for Solving the Problems] In order to solve the above problems, this invention, in the battery having the above structure, makes the central part of the cover plate protrude toward the valve chamber side to form a raised bottom part. A ventilation hole is formed at the top of the bottom, and an elastic valve body that closes the ventilation hole and a leaf spring that presses the elastic valve body are housed in a valve chamber at the top of the raised bottom. The anode lead plate of the lid plate is welded.

[Effect]

By forming the raised bottom part in the center of the lid plate as described above, the distance between the upper end surface of the valve chamber and the lid plate can be shortened at the raised bottom part. can be used. Since this leaf spring is cheaper than a coil spring, it is possible to reduce the product cost of the battery. In addition, by forming a raised bottom in the center of the lid plate, it is possible to weld the anode lead plate of the lid plate to the inner wall of the raised bottom or the outer periphery of the lower end of the inner wall of the raised bottom. Therefore, welding can be performed at a position away from the elastic valve body, and there is no risk of burning the elastic valve body.

〔Example〕

Hereinafter, an embodiment of the battery according to this invention will be described based on FIG. 1.

A cover plate 3 is fitted into the opening of a cathode terminal bottomed cylinder 1 which also serves as an exterior case through an insulating packing 2.
An anode terminal cap 4 is fixed to the upper surface of this cover plate 3.

The battery chamber 5 surrounded by the cathode terminal bottomed cylindrical body 1 and the lid plate 3 includes a cathode plate 6 whose active material is, for example, cadmium hydroxide, and an anode plate 7 whose active material is nickel hydroxide. A spiral power generation element body 9 is housed in which the power generation element body 9 is wound with a separator 8 in between.

A valve chamber 10 is formed in the center of the lid plate 3 and is surrounded by the lid plate 3 and the anode terminal cap 4.
A raised bottom portion 11 that protrudes to the side is formed. Ventilation holes 13 and 14 are formed in the top portion 12 of the raised bottom portion 11 and the anode terminal cap 4, respectively.

Inside the valve chamber 10, there is a top portion 12 of the raised bottom portion 11.
An elastic valve body 15 made of rubber, a seat plate 16, and a spring 17 are housed inside.

An insulating washer 1 is provided on the upper end surface of the power generation element 9.
8 is provided, and an anode lead plate 19 led out from the anode plate 7 is pulled out through the perforation 20 of the insulating washer 18 and spot-welded to the cover plate 3 at the lower end outer peripheral edge of the inner wall 21 of the raised bottom part 11.

[Effect of idea]

As described above, according to this invention, a battery can be obtained without using an expensive coil spring and without the risk of burning the elastic valve body due to spot welding of the anode lead plate.

[Brief explanation of drawings]

FIG. 1 is a partial sectional view showing an embodiment of the battery according to this invention, and FIG. 2 is a partial sectional view of a conventional battery. 1... Cathode terminal bottomed cylinder, 2... Insulating packing, 3... Lid plate, 4... Anode terminal cap, 5...
...Battery chamber, 9...Power generation element, 10...Valve chamber, 11
...Raised bottom, 12...Top, 13, 14...Vent hole, 15...Elastic valve body, 16...Seat plate, 17...
...Spring, 19...Anode lead plate.

Claims (1)

[Scope of utility model registration request] A cathode terminal bottomed cylinder 1, a cover plate 3 fitted into the opening of the cathode terminal bottomed cylinder 1 via an insulating packing 2, an anode terminal cap 4 fixed to the upper surface of the cover plate 3, A power generation element 9 is housed in a battery chamber 5 surrounded by a cathode terminal bottomed cylinder 1 and a cover plate 3, and a valve chamber 10 is housed in a valve chamber 10 surrounded by an anode terminal cap 4 and a cover plate 3. The anode terminal cap 4 has an elastic valve body 15 that is housed and closes a ventilation hole 13 formed in the cover plate 3, and a spring 17 that presses the elastic valve body 15, and a ventilation hole 14 is formed in the anode terminal cap 4. The anode lead plate 19 of the power generation element body 9 is the cover plate 3
In the battery, the lid plate 3 has a raised bottom part 11 in the center thereof that protrudes toward the valve chamber 10, a vent hole 13 of the lid plate 3 is formed at the top of the raised bottom part 11, and The spring 17 is constituted by a leaf spring, and the anode lead plate 19 is raised from the bottom part 11.
A battery characterized in that the battery is welded to the inner wall 21 of the battery.