JPH07105919A - Rectangular sealed storage battery - Google Patents

Abstract

PURPOSE:To reduce poor workmanship in assembling a lid of a rectangular sealed storage battery and perform the assembly with good easiness in works. CONSTITUTION:A gasket, hollow rivet, insulative spacer, and metal washer are fixed to a seal plate, and a battery lid is fitted with a positive electrode terminal equipped with a relief valve in the upper part of the hollow rivet, and the opening of a battery vessel accommodating power generating elements is sealed with this lid. An angular-form sealed storage battery is thus accomplished, wherein a recess 5a for location of the metal washer is provided in the insulative spacer 5 in symmetricity about a through hole 5b provided therein.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a prismatic closed type storage battery, and more particularly to improvement of a battery lid thereof.

[0002]

2. Description of the Related Art The planar shape of a prismatic sealed storage battery is rectangular or square, and accordingly, the planar shape of both the battery container and the battery lid is rectangular or square.

Therefore, when assembling the battery lid of the prismatic sealed storage battery, unlike the case of the circular battery, it is necessary to align the three parts of the sealing plate, the insulating spacer and the metal washer in a certain direction, and the parts are assembled at the time of assembling. There is a problem in that if the battery rotates and the position shifts, a defective assembly occurs, and a defective fitting also occurs when the battery lid is fitted to the battery container.

[0004]

DISCLOSURE OF THE INVENTION The present invention solves the problem that the conventional prismatic closed type storage battery is liable to cause the assembly failure, and the assembly operation is less likely to occur. It is an object of the present invention to provide a prismatic sealed storage battery having good performance.

[0005]

According to the present invention, a recess for positioning a metal washer is provided in an insulating spacer, and the recess is symmetrical with respect to the through hole of the insulating spacer.
Alternatively, by making it symmetrical with respect to the through hole, the occurrence of defective assembly can be reduced and the assembling workability can be improved to achieve the above object.

[0006]

Embodiments of the present invention will now be described with reference to the drawings. However, the present invention is not limited to only those illustrated in these examples.

Example 1 FIG. 1 is a schematic perspective view showing an insulating spacer used in Example 1, and FIG. 2 is a sectional view showing an essential part of a battery lid using the insulating spacer shown in FIG. In FIG. 2, in order to avoid complication, only the cut surface is shown, and the contour line and the like behind the cut surface are omitted. And FIG. 3 is a schematic perspective view of a prismatic sealed storage battery.

First, the components of the battery lid will be briefly described with reference to FIG. 2. The battery lid 1 includes a sealing plate 2, a gasket 3, a hollow rivet 4, an insulating spacer 5, a metal washer 6, an elastic valve body 7 and a cap-shaped positive electrode. It is composed of terminals 8.

Next, the insulating spacer 5 will be described in detail with reference to FIG. The insulating spacer 5 shown in FIG. 1 is shown in an upside-down state as compared with when it is assembled in the battery lid 1 shown in FIG. 2, and a metal washer 6 is provided on the upper part thereof.
It has a concave portion 5a for positioning.

A through hole 5 is formed in the center of the insulating spacer 5.
b, the recess 5a is symmetrical with respect to the through hole 5b, and the recess 5a accommodates a part of the metal washer 6 and is used for positioning the metal washer 6 as shown in FIG. Has been done.

The through hole 5 in the central portion of the insulating spacer 5
Reference numeral b is for penetrating the shaft portion of the hollow rivet 4, and a cutout recess 5c is provided on the surface of the insulating spacer 5 opposite to the surface on which the recess 5a is provided. The downwardly projecting portion in the central portion of the sealing plate 2 is accommodated.

Next, the assembly of the battery cover 1 will be described.

First, the leg portion of the gasket 3 is inserted into the through hole in the central portion of the sealing plate 2, and the shaft portion of the hollow rivet 4 is inserted into the through hole in the central portion of the gasket 3, or the hollow rivet 4 is inserted. After inserting the shaft into the through hole of the gasket 3,
The leg portion of the gasket 3 is inserted into the through hole of the sealing plate 2, and the shaft portion of the hollow rivet 4 penetrates the through hole of the sealing plate 2 with the leg portion of the gasket 3 interposed.

From the opposite side, the insulating spacer 5
Is inserted into the shaft portion of the hollow rivet 4 and the outer peripheral side of the leg portion of the gasket 3 using the through hole 5b, and the metal washer 6 is further inserted into the shaft portion of the hollow rivet 4 and the gasket 3.
Fit on the outer peripheral side of the legs. At this time, a part of the metal washer 6 is housed in the recess 5a of the insulating spacer 5, and the metal washer 6 is positioned by the recess 5a.

After fitting the metal washer 6 as described above, the hollow rivet 4 is caulked to fix the gasket 3, the hollow rivet 4, the insulating spacer 5 and the metal washer 6 to the sealing plate 2.

Next, an elastic valve body 7 made of rubber is placed on the through hole of the hollow rivet 4, the elastic valve body 7 is compressed and fixed by a cap-shaped positive electrode terminal 8, and the flange portion of the elastic rivet 4 is fixed. The assembly of the battery cover 1 is completed by spot welding to the head.

The metal washer 6 has a function as a positive electrode current collector. The metal washer 6 comes into contact with the shaft of the hollow rivet 4 by caulking, and the insulating spacer 5 has the metal washer 6 and the sealing plate 2. Insulate and.

The elastic valve body 7 normally closes the through hole of the hollow rivet 4, but when gas is generated inside the battery due to some accident and the pressure inside the battery rises abnormally, it deforms and becomes hollow. Acts as a safety valve that opens the through hole of the rivet 4 from the closed state and releases the gas inside the battery to the outside of the battery through a slit (not shown) provided in the positive electrode terminal 8 to prevent the battery from bursting under high pressure. To do.

With this battery lid 1, when assembling it,
As described above, when the metal washer 6 is fitted into the shaft portion of the hollow rivet 4, a part of the metal washer 6 is housed in the recess 5a of the insulating spacer 5, whereby the metal washer 6 is positioned.

Therefore, when the battery cover 1 is assembled, the metal washer 6 is not displaced and the assembly failure is prevented. Further, since the concave portion 5a of the insulating spacer 5 is formed symmetrically with respect to the through hole 5b, the metal washer 6 can be accommodated in a half-rotated state, whereby the metal washer 6 can be positioned. Assembling workability is also good.

Then, the battery lid 1 assembled as described above is fitted into the opening of the battery container 10 accommodating the power generating element as shown in FIG. 3, and the battery lid 1 and the battery container 10 are joined together. The part was seam welded with a laser beam and sealed to produce a prismatic sealed storage battery.

Example 2 A battery lid was assembled in the same manner as in Example 1 except that the insulating spacer 5 shown in FIG. 4 was used, and a prismatic sealed storage battery was produced using the battery lid.

Now, the insulating spacer 5 shown in FIG. 4 will be described. The insulating spacer 5 shown in FIG. 4 is also shown in an upside down state when it is assembled into the battery lid 1 in the state shown in FIG. A recess 5a for positioning the metal washer 6 is provided on the upper surface thereof.

The recess 5a is a through hole 5b of the insulating spacer 5.
The metal washers 6 are symmetrically provided with respect to each other, and a part of the metal washer 6 can be housed in each of the right half space and the left half space, and can be used for positioning the metal washer 6.

Therefore, even when this insulating spacer 5 is used, since the metal washer 6 can be positioned by the concave portion 5a, defective assembly can be prevented.

Further, since the recess 5a is provided symmetrically with respect to the through hole 5b, the metal washer 6 can be positioned at either the left or right position, and the workability during assembly is also good.

Comparative Example 1 A battery lid was assembled in the same manner as in Example 1 except that the insulating spacer 5 shown in FIG. 5 was used, and a prismatic sealed storage battery was produced using the battery lid.

The insulating spacer 5 used in Comparative Example 1 will be described. The insulating spacer 5 shown in FIG. 5 is also shown in an upside-down state when assembled in the battery lid. 5 does not have a recess for positioning the metal washer, and Comparative Example 1 corresponds to the conventional example.

The assembly failure rate when the battery lid was assembled in Examples 1 to 2 and Comparative Example 1 was examined. The results are shown in Table 1.
Shown in.

[0030]

[Table 1]

As shown in Table 1, in Comparative Example 1 corresponding to the conventional example, as many as 15% of assembly defects occurred when the battery lid was assembled, but in the cases of Examples 1 and 2 of the present invention, the assembly defects occurred. It didn't happen at all. This is Example 1 of the present invention.
2, the metal washer 6 can be positioned by the concave portion 5a of the insulating spacer 5, and the metal washer 6 serves as the insulating spacer 5.
It is considered that this is because the assembly was performed while being fixed in the concave portion 5a.

[0032]

As described above, according to the present invention, since the insulating spacer 5 is provided with the recess 5a for positioning the metal washer 6 symmetrically, the occurrence of assembly failure during battery lid assembly is reduced, Moreover, the assembly could be performed with good workability.

[Brief description of drawings]

FIG. 1 is a schematic perspective view showing an example of an insulating spacer used for a battery lid of a prismatic sealed storage battery of the present invention.

FIG. 2 is a cross-sectional view showing a main part of a battery lid assembled using the insulating spacer shown in FIG.

FIG. 3 is a schematic perspective view showing an example of a prismatic sealed storage battery according to the present invention.

FIG. 4 is a schematic perspective view showing another example of an insulating spacer used for the battery lid of the prismatic sealed storage battery of the present invention.

FIG. 5 is a schematic perspective view showing an insulating spacer used in a battery lid of a conventional prismatic sealed storage battery.

[Explanation of symbols]

 1 Battery Cover 2 Sealing Plate 3 Gasket 4 Hollow Rivet 5 Insulating Spacer 5a Recess 5b Through Hole 6 Metal Washer 7 Elastic Valve Body 8 Positive Terminal

Claims (2)

[Claims] 1. A gasket 3 is provided in a through hole in a central portion of a sealing plate 2.
Through the legs of the hollow rivet 4 to penetrate the shaft,
The hollow rivet 4 is caulked to fix the gasket 3, the hollow rivet 4, the insulating spacer 5 and the metal washer 6 to the sealing plate 2, and the battery lid 1 having the positive electrode terminal 8 provided with the safety valve on the upper part of the hollow rivet 4 In a prismatic closed type storage battery in which an opening of a battery container 10 accommodating a power generation element is sealed, the insulating spacer 5 has a recess 5a for positioning a metal washer 6, and the recess 5a.
Is a left-right symmetric type with the through hole 5b of the insulating spacer 5 as the center, which is a prismatic sealed storage battery. 2. The gasket 3 is provided in the through hole at the center of the sealing plate 2.
Through the legs of the hollow rivet 4 to penetrate the shaft,
The hollow rivet 4 is caulked to fix the gasket 3, the hollow rivet 4, the insulating spacer 5 and the metal washer 6 to the sealing plate 2, and the battery lid 1 having the positive electrode terminal 8 provided with the safety valve on the upper part of the hollow rivet 4 In a prismatic closed type storage battery in which an opening of a battery container 10 accommodating a power generation element is sealed, the insulating spacer 5 has a recess 5a for positioning a metal washer 6, and the recess 5a.
Is a symmetric shape with respect to the through hole 5b, and is a prismatic sealed storage battery.