JPH04332463A - Closed type lead-acid battery - Google Patents

Abstract

PURPOSE:To secure a closed condition by means of interference within tolerance of deformation of an O ring while putting a pole pillar hole of a cap and a pole pillar in a concentrical form by intruding/embedding a projection of the pole pillar having the same diameter as the pole pillar hole of the cap into the pole pillar hole. CONSTITUTION:A projection 2a is arranged on a pole pillar 2, and is welded to a pole plate group 1, and is housed in a battery jar 3. Next, a cap 4 is turned upside down, and bond 6 is filled into a fitting groove 4b to which an outside wall upper edge part 3a of the battery jar 3 and an inside partition wall upper edge part 3b of the battery jar are fitted together. Afterwards, the group 1 installed in the battery jar 3 is turned upside down, and fitting to the cap 4 is carried out in order from the pole pillar 2, and the battery jar 3 and the cap 4 are connected together. Next, an O ring 5 is inserted between the pole pillar 2 and a pole pillar hole 4a, and a closed condition is formed, and adhesive 7 is poured into a recess part of the cap 4 in the upper part of the O ring 5 so as to seal up completely. Thereby, the pole pillar and the pole pillar hole can be put in a concentrical form, so that a closed condition can be secured by means of interference within tolerance of deformation of the O ring.

Description

[Detailed description of the invention]

0001

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a sealed lead-acid battery, and more particularly to a sealed lead-acid battery with an improved pole structure.

0002

2. Description of the Related Art In recent years, sealed lead-acid batteries have been required to have a high energy density per volume as power sources for cordless electronic devices and as backup power sources for computers and the like. One way to meet this requirement is to reduce the space between the electrode and the lid.

[0003] The structure of a conventional sealed lead-acid battery in the vicinity of the pole will be explained below. Conventional sealed lead-acid batteries, electrodes (
This figure shows the structure of the cylindrical structure (hereinafter referred to as a pole column) and the lid. In FIG. 4, 1 is a group of electrode plates, 2 is a pole pole, 3 is a battery case, 4 is a lid having a pole hole 4a, and 5 is an O-ring rubber packing that seals between the pole pole 2 and the pole hole 4a. (hereinafter abbreviated as O-ring), 6 is a bonding agent for the battery case 3 and the lid 4,
7 is an adhesive for sealing the recess 4c of the lid 4 above the pole post 2 and the O-ring 5.

[0004] The manufacturing process of the sealed lead-acid battery constructed as described above will be explained below. First, the pole pole 2 is welded to the pole plate group 1 and housed in the battery case 3. Next, the lid 4 is turned upside down and the bonding agent 6 is inserted into the fitting groove 4b into which the upper edge 3a of the outer wall of the battery case 3 and the upper edge 3b of the inner partition wall of the battery case fit.
Fill it. After making the above preparations, the electric board group 1 placed in the battery case 3 is turned upside down and fitted to the lid 4 sequentially starting from the pole post 2, thereby joining the battery case 3 and the lid 4.

Next, as shown in FIG. 4, the O-ring 5 is inserted between the pole post hole 4a and the pole post 2 to create a sealed state, and finally, adhesive 7 is applied to the recess 4c of the lid 4 above the O-ring 5. Drain and seal completely.

[0006]

However, in the above-mentioned conventional configuration, the pole post 2 is not positioned concentrically or nearly concentrically with the pole post hole 4a of the lid 4, so the sealing action of the O-ring 5 is not effective. The problem was that it did not work. The main reason is that the pole post 2 has a smaller diameter than the pole post hole 4a.
This is because if the O-ring 5 is eccentrically inserted into the pole post hole 4a, the O-ring 5 cannot perform a normal sealing action between the pole post 2 and the pole post hole 4a. The problem is that if the pole post 2 and the pole post hole 4a are made to have approximately the same diameter, the fitting operation becomes difficult, and if the allowable deformation range of the O-ring 5 is increased, it becomes difficult to insert the O-ring 5 into the pole post 2. Therefore, the pole post 2 needs to be at least about 0.5 mm thinner than the pole post hole 4a.

The present invention solves the above-mentioned conventional problems, and when the battery case and the lid are fitted, the position of the pole is determined to be concentric or almost concentric with the pole pole hole of the lid, and the O-ring The purpose of the present invention is to provide a sealed lead-acid battery that can ensure complete sealing.

[0008]

[Means for Solving the Problems] In order to solve this problem, the sealed lead-acid battery of the present invention has a structure in which the poles are arranged so that the poles are positioned concentrically or almost concentrically with respect to the poles holes in the lid. The part of the lid that contacts the pole hole is equipped with a protrusion that is larger in diameter than the top of the pole.

[0009]

[Operation] With this configuration, the sealed lead-acid battery of the present invention has
The pole post and the pole post hole of the lid are concentric or almost concentric, and when the O-ring is inserted, a uniform tightness allows a sealed state to be maintained.

0010

DESCRIPTION OF THE PREFERRED EMBODIMENTS Sealed lead-acid batteries according to embodiments of the present invention will be described below with reference to the drawings.

In FIG. 1 showing a sealed lead-acid battery according to a first embodiment of the present invention, 1 is a group of electrode plates, 2 is a pole column, and 2a
is a projection (ring-shaped projection with a semicircular cross section) with a diameter larger than the diameter of the top of the pole provided at the part of the cover 4 of the pole pole 2 that is in contact with the pole pole hole 4a, 3 is a battery case, and 4 is a pole hole. lid with 4a, 5
is an O-ring, 6 is a bonding agent between the battery case 3 and the lid 4, and 7 is a pole pole 2a.
This is an adhesive for sealing the recess 4c of the lid 4 above the O-ring 5.

The operation of the sealed lead-acid battery constructed as described above will be explained below while following its manufacturing process.

First, the pole post 2 is manufactured as a component with the protrusion 2a, welded to the pole plate group 1, and housed in the battery case 3. Next, turn the lid 4 upside down and place it on the upper edge 3 of the outer wall of the battery case 3.
a. A bonding agent 6 is filled into the fitting groove 4b into which the upper edge 3b of the partition wall of the battery case is fitted. After making the above preparations, the electrode plate group 1 placed in the battery case 3 is turned upside down and fitted to the lid 4 sequentially starting from the pole post 2, thereby joining the battery case 3 and the lid 4. Next, the O-ring 5 is inserted between the pole post 2 and the pole post hole 4a of the lid 4 to create a sealed state, and finally the adhesive 7 is applied to the recessed part of the lid 4 above the O-ring 5.
Pour into c and seal completely.

As described above, according to this embodiment, by penetrating and fitting the protrusion 2a of the pole post 2 having approximately the same diameter as the pole post hole 4a of the lid 4 into the pole post hole 4a, the pole post of the lid 4 can be opened. The hole 4a and the pole post 2 are concentric or almost concentric, and a tightness margin is secured within the allowable deformation range of the O-ring 5, thereby eliminating sealing defects.

In the embodiment, the protrusion 2a of the first embodiment of the pole post 2 was a ring-shaped protrusion with a semicircular cross section, but the protrusions 2b, 2c, etc. of other embodiments as shown in FIG. It goes without saying that it is good to make it a protrusion. Second example 2b
Embodiment 2c is a ring-shaped protrusion with a trapezoidal cross section.

[0016]

[Effects of the Invention] As is clear from the invention of the above embodiments, according to the sealed lead acid battery of the present invention, when the battery case and the lid are fitted together,
To ensure that the pole is concentric or almost concentric with the pole hole of the lid, place a protrusion larger in diameter than the top of the pole (approximately the same diameter as the pole hole of the lid) on the part where the pole and the pole hole of the lid contact. ), it is possible to realize a sealed lead-acid battery with a highly airtight seal between the pole and the pole hole of the lid. In addition, the fitting work and the insertion work of the rubber packing of the O-ring can be performed at a conventional level of man-hours, and it is also possible to mechanize the work, which is extremely effective in improving productivity.

[Brief explanation of drawings]

FIG. 1 is a vertical cross-sectional view showing the main parts near the poles of a sealed lead-acid battery according to a first embodiment of the present invention.

FIG. 2 is a front view of a pole column equipped with a protrusion used in a sealed lead-acid battery according to the first, second and third embodiments of the present invention.

[Figure 3
] Front view of a pole used in a conventional sealed lead-acid battery

[Figure 4]
Vertical cross-sectional view showing the main parts near the poles of a conventional sealed lead-acid battery

[Explanation of symbols]

1 Pole group 2 Polar pillar 2a Protrusion 3 Battery case 4 Lid 4a Pole hole 5 O-ring rubber gasket 6. Bonding agent 7. Sealing adhesive

Claims (1)

[Claims] 1. A battery case, a group of electrode plates inserted into the battery case and having a cylindrical pole post, and a lid having a pole post hole penetrating the pole post and fitting into the battery case, A rubber packing is provided to be inserted between the pole post and the pole post hole of the lid, and when the lid is fitted to the battery case, the pole post is placed concentrically or almost concentrically with the pole post hole of the lid. A sealed lead-acid battery comprising a protrusion larger in diameter than the top of the pole on a portion of the pole that contacts the pole hole of the lid so as to determine the position of the pole.