JP2000164244A - Lead storage battery - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a lead storage battery having a structure of simply aligning a terminal to a through-hole of a cover and superior in productivity and preven tive of defectives during assembly. SOLUTION: A resin wrapped terminal 1 has a lead pole column 2 and a resin portion 3 molded while wrapping the lead pole column on its periphery in an air-tight manner. The lead pole column 2 of the terminal 1 is inserted into a through-hole of a cover 8 and the resin portion 3 is welded around the lower part of the through-hole. The resin wrapped terminal 1 is positioned by a sleeve 12 hanging down from the lower face of the cover 8. The sleeve 12 preferably hangs down from the lower face of the cover 8 so as to contact the side of the resin portion 3 at least at three points.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a structure for positioning a resin wound terminal of a lead storage battery.

[0002]

2. Description of the Related Art FIG. 3 is an explanatory view showing a conventional method of manufacturing a lead storage battery, and shows a state immediately before welding a resin wound terminal and a lid, and a battery case and a lid. In the figure, 1 is a resin wound terminal, 2 is a lead pole of the terminal 1, 3 is a resin portion formed by hermetically surrounding the peripheral surface of the lead pole 2, 4 is the terminal 1
, 5 are ears of a number of electrode plates (electrodes of opposite polarity opposite to the electrode plate 6) connected by the strap 4, 7 is a battery case, and 8 is attached to the upper surface of the battery case. The lid 9 is a through hole of the lid 8, 10 is a faston terminal connected to the tip of the resin wound terminal 1, and 11 is a projection formed around the lower part of the through hole 9 of the lid.

In order to attach the lid 8 to the battery case 7 accommodating the electrode group with the resin winding terminal 1, the upper edge 7 a of the battery case 7 and the lower edge 8 a of the lid 8 are aligned as shown in the figure. When they are aligned, the lead pole 2 of the resin wound terminal 1 is
Have to fit in. Therefore, the following countermeasures have conventionally been taken. That is, when the electrode group is inserted into the battery case 7, the terminal 1 is fixed by the positioning jig so that the position of the terminal 1 does not shift from the position of the through hole 9 of the lid 8. Further, the size of the through hole 9 is made larger than the outer diameter of the tip of the lead pole 2 so that the terminal 1 can cope with a slight displacement of the terminal 1 from the through hole 9. Then, before heat-welding the battery case 7 and the lid 8 and the battery case 7 and the terminal 1, a lid or a jig instead of the lid is placed on the battery case, and the terminal 1 is positioned from the upper surface of the through hole of the lid or the jig. After checking, the terminal with misalignment was corrected.

[0004]

However, after the pole group is stored in the battery case, the position of the terminal cannot be corrected by moving the entire pole group. Therefore, only the terminal is moved to correct the position. The terminal was inclined from the vertical direction, and the upper surface of the resin portion 3 was inclined from the horizontal direction. When a hot plate is pressed against and melted on the upper surface of such a resin portion, and the upper surface of the resin portion and the protrusion 11 of the lid are to be thermally welded, the inclination of the terminal 1 is further promoted by pressing the resin portion, and the terminal There was a problem in that it was displaced from the position of the through hole 9 and did not fit in the through hole.

Therefore, an object of the present invention is to provide a structure in which the terminal is automatically fitted into the through hole even if the position of the terminal and the through hole is displaced, and the position of the terminal and the through hole is accurately adjusted. An object of the present invention is to provide a lead-acid battery that does not need to be melted and that is fitted into the through-hole even if the position of the terminal is slightly shifted after the resin portion is melted.

[0006]

In order to achieve the above object, the present invention provides a resin wound terminal comprising a lead pole and a resin portion formed by hermetically surrounding the peripheral surface of the lead pole. In a lead-acid battery in which a lead pole of the terminal is inserted into a through-hole of a lid and a resin portion is welded around a lower portion of the through-hole, the resin-wound terminal is positioned by a sleeve hanging down from a lower surface of the lid. It is characterized by having. Further, it is preferable that the sleeve hangs down from the lower surface of the lid so as to contact at least three places on the side surface of the resin portion.

[0007]

DESCRIPTION OF THE PREFERRED EMBODIMENTS FIG. 1 is a partially sectional front view showing an embodiment of the present invention, FIG. 2 is an explanatory view showing a manufacturing method of FIG. 1, and the same symbols as those in FIG. .

As shown in FIGS. 1 and 2, the resin-wound terminal 1 comprises a columnar lead pole 2 and a resin portion 3 formed on the peripheral surface of the pole. The resin part 3 has a lid 8
Is welded to a projection 11 projecting from the lower part of the through hole 9, and a projection 13 is formed on the peripheral surface.
Contacting with the inner surface of the sleeve 12 that hangs down from the periphery of the projection 11 of FIG. The sleeve 12 has a cylindrical shape, and has a lower edge inclined inward so as to guide the terminal inward when the terminal 1 is inserted from below.

The lead pole 2 has an upper part inserted into the through hole 9 of the lid 8 and a leading end connected to one end of a faston terminal 10 arranged on the upper surface of the lid 8. The lower part of the pole 2 is connected to a strap part 4, and the strap 4 connects the ears 5 of a plurality of poles of different polarity facing the pole plate 6.

The lid 8 is generally in the form of a box with a lower opening, and has a partition wall 14 for partitioning the inside into a plurality of cell chambers. The box-shaped battery case 7 corresponds to the positions of the partition wall 14 and the peripheral wall 15. Also has a partition 16 and a peripheral wall 17. The upper and lower edges of the partition walls 14 and 16 and the peripheral walls 15 and 17 are heat-welded to be integral. Although not shown, an upper lid is mounted on the Faston terminal 10.

Note that the sleeve 12 according to the present embodiment is
Although the inner diameters are made equal, the inner diameter of the lower part may be made larger than that of the upper part so that the terminal 1 can be easily inserted. Further, instead of a cylindrical shape, for example, a rod-shaped material may be provided evenly at least at three places around the resin portion.

Next, the manufacturing method of the present invention will be described with reference to FIG.

First, a jig is applied to the electrode plate surfaces at both ends of the electrode group with the resin-wound terminal 1 to apply pressure and compress the electrode group, and housed in a battery case. Then, the lid 8 is temporarily placed on the upper part of the battery case 7, and it is checked whether or not the terminal 1 on the upper part of the electrode group fits into the through hole 9 of the lid 8,
If it does not fit, fix it with a jig. In this case, terminal 1
May not be coincident with the center of the through hole 9 and may be slightly shifted. Next, the upper surface of the resin portion of the terminal 1, the upper edge 7a of the battery case and the lower edge 8a of the lid are melted with a hot plate, and after removing the hot plate, the lower edge 8a of the lid is quickly brought into contact with the upper edge 7a of the battery case. The lid 8 is pushed down in the direction of the battery case 7 so as to be positioned so as to be in contact with each other and to fit the terminal 1 into the sleeve 12 of the lid 8. Then, the upper edge 7 a of the battery case and the lower edge 8 a of the lid are welded, and the upper surface of the resin portion is welded to the lower surface of the projection 11 of the lid 8. Thereafter, the upper lid is attached to the upper surface of the faston terminal 10 to complete the assembly of the battery of the present invention.

[0014]

As described in detail above, according to the present invention,
When assembling the battery, the terminal and the through-hole may be slightly displaced from each other, so that adjustment of the terminal position by fitting the lid can be eliminated, and the productivity is excellent. Further, even if the terminal portion is slightly displaced from the through hole after the resin portion of the terminal, the battery case, and the lid are melted by the hot plate, the terminal is corrected by the sleeve, so that occurrence of defective products can be suppressed.

[Brief description of the drawings]

FIG. 1 is a partially sectional front view showing an embodiment of a lead storage battery of the present invention.

FIG. 2 is a partial cross-sectional front view showing the lead-acid battery of FIG. 1 in the process of being manufactured.

FIG. 3 is a partial cross-sectional front view showing a conventional lead storage battery in the course of manufacturing.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Resin winding terminal 2 Lead pole 3 Resin part 8 Lid 9 Through hole 12 Sleeve

Claims (2)

[Claims] 1. A resin-wound terminal comprising a lead pole and a resin part formed by hermetically surrounding the peripheral surface of the lead pole, wherein the lead pole is inserted into a through hole of a lid, and the resin part is A lead-acid battery welded around the lower part of the through-hole, wherein the resin-wound terminal is positioned by a sleeve hanging down from a lower surface of the lid. 2. The lead-acid battery according to claim 1, wherein the sleeve is suspended from a lower surface of the lid so as to be in contact with at least three portions of the side surface of the resin portion.