JPH02170344A - Sealed lead storage battery - Google Patents

Abstract

PURPOSE:To eliminate a jig, and to reduce the number of process and the cost of parts, by spreading a liquid sealing agent on the outer surface of exhaust ports, providing a plain synthetic rubber, a continuously foamy sponge body, and an upper lid in order in the front side recess, and providing projections to gear with the holes arranged on the upper side of the upper lid on a cover. CONSTITUTION:Around the exhaust ports B of an inner lid 2, a liquid sealing agent 8 is spread, over which a synthetic rubber 4 and a sponge 5 are installed, and then, an upper lid 6' is installed. In this case, holes E are provided to the upper lid 6' at the positions parallel to the projections D of the inner lid 2, the size of the diameter phi1 of the holes E is made smaller than the diameter phi2 of the projections D, and when the projections D are inserted to the holes E, the projections D are geared while the peripheries of the holes E are smashed. Under such a condition, the synthetic rubber 4 and the sponge 5 are not slipped, and the upper lid 6' is fixed to the inner lid 2. Consequently, a jig to position the synthetic rubber 4 and the sponge 5 can be eliminated, and the number of process and the cost of parts can be reduced.

Description

[Detailed description of the invention] Industrial applications The present invention relates to a sealed lead acid battery.

BACKGROUND OF THE INVENTION Conventional sealed lead-acid batteries are manufactured by mounting a jig 3 in such a way that the shaded area A provided in the middle M2 is exposed, as shown in FIGS. 5 to 8.
, apply liquid sealant 8 around the exhaust hole B,
A rigid rubber 4 and a sponge 5 are mounted on top of it, and a lid 6 is further mounted on top of it. Then, while pressing the synthetic rubber 4 and sponge 5, the ultrasonic horn 7 is applied to the outer surface of the top lid 6.
The inner lid 2 and the upper lid 6 were placed in close contact with each other using ultrasonic waves, and were used as a safety valve.

Problems to be Solved by the Invention In such a conventional configuration, the jig 4 for attaching the LM 6, synthetic rubber 4, and sponge 5 to predetermined positions of the inner lid 2 and the exhaust hole B requires a lot of man-hours. In addition, the cost of parts is high. In addition, as shown in Fig. 8, in order to keep the suppression of the synthetic rubber 4 and sponge 5 constant and have a stable valve function, and to ultrasonically weld the upper lid 6 and the inner lid 2, the inner lid 2 is vented. A bank 0 is provided at a position higher than the outer surface B' of hole B, but before the sponge 5 is suppressed, it is more than twice as thick as the height of the bank C, so there is a possibility that it will climb up onto the bank C and be installed. If the upper lid 6 is ultrasonically welded to the inner lid 2 in this state, an appropriate valve function cannot be obtained.

The present invention is intended to solve these problems, and aims to eliminate the use of jigs, reduce work man-hours and component costs, and provide stable valve function.

Means for solving the problem Four parts with exhaust holes are provided on the top surface of the cover that covers the battery case,
A sealed lead-acid battery in which oxygen gas generated from the positive electrode plate during charging is absorbed and removed by the negative electrode plate, and the outer surface of the exhaust hole is coated with a liquid sealant, and the battery is made of flat synthetic rubber and continuous foam. A sponge body and a top cover are provided in order in the front recess, and the cover is provided with a protrusion that fits into a hole provided in the top cover.

Function: With this configuration, it is possible to eliminate jigs for positioning the synthetic rubber, sponge body, and top cover, which reduces work man-hours and parts costs, and eliminates misalignment between the synthetic rubber and the sponge body, and ensures proper positioning. Since it can be installed in the position, it can have stable valve function.

Embodiment Hereinafter, one embodiment of the present invention will be described with reference to the drawings. Note that the same reference numerals are given to the parts having the same configuration as in the conventional example, and the explanation thereof will be omitted.

FIG. 1 is a perspective view showing the structure of a sealed lead-acid battery according to an embodiment of the present invention, and FIGS. 2 to 4 show cross-sectional views of its main parts and a manufacturing method.

1 to 4, a liquid sealant 8 is applied around the exhaust hole B of the inner lid 2, and a synthetic rubber 4 and a sponge 5 are applied on top of the liquid sealant 8.
Attach. At this time, the inner lid 2 is provided with protrusions that come to both ends of the synthetic rubber 4 and the sponge 5, and the height H of this protrusion is .

Thickness tl of synthetic rubber 4, thickness t2 of sponge 5, and E lid 6
Because the dimensions are greater than the sum of the thicknesses t3 of ゛, there is no need to worry about the synthetic rubber 4 and sponge 5 climbing up on the embankment 〇 (they can be installed in the designated position.And after installing the synthetic rubber 4 and sponge 5, Attach M6''.The method is to make a hole E in the upper lid 6'' at a location parallel to the protruding part of the inner lid 2.
The diameter φ of this hole E is the diameter of the protrusion φ
When a hole E smaller than 2 is inserted into the protrusion, the periphery of the hole E is crushed while fitting into the protrusion. In this state, the synthetic rubber 4 and the sponge 5 are misaligned, and the upper lid 6' is fixed to the inner lid. Then, while pressing the synthetic rubber 4 and sponge 5, the ultrasonic horn 7 hits the outer surface of the upper M6'.
Ultrasonically weld middle M2 and upper M6'. In this case, since the protrusion is flattened, there is no risk of the F lid 6' lifting up (it can have a stable valve function).

Effects of the Invention As described above, in the sealed lead-acid battery of the present invention, there is no misalignment between the synthetic rubber and the sponge body (and it can be installed in a predetermined position, so it can have a stable valve function. , sponge body,'' - Since the jig for positioning the lid can be eliminated, parts costs and work man-hours can be reduced, and an inexpensive sealed lead-acid battery can be provided.

[Brief explanation of the drawing]

FIG. 1 is a perspective view showing the structure of a sealed lead-acid battery according to an embodiment of the present invention, FIGS. 2, 3, and 4 are sectional views of the main parts thereof, and FIGS. FIG. 7 is a perspective view showing the structure and manufacturing method of a conventional sealed lead-acid battery, and FIG. 8 is a sectional view of the main parts thereof. 1...Battery case, 2...Lid (cover), 4
...Synthetic rubber, 5...Sponge body, 6
゛・・・Top lid, 8・Old・Liquid sealant, B・・
...Exhaust hole, D...Protrusion. Agent's name: Patent attorney Shigetaka Awano 1 person/-1 cypress

Claims (1)

[Claims] A recess with an exhaust hole is provided on the top surface of the cover that covers the battery case.
A sealed lead-acid battery in which oxygen gas generated from the positive electrode plate during charging is absorbed and removed by the negative electrode plate, and the outer surface of the exhaust hole is coated with a liquid sealant, and the battery is made of flat synthetic rubber and continuous foam. A sealed lead-acid battery, wherein a sponge body and a top cover are provided in order in a front recess, and the cover is provided with a protrusion that fits into a hole provided in the top cover.