JPH11283587A - Lead-acid battery - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a compact lead-acid battery, capable of preventing damaging of a strap or an exhaust chamber formed on the under surface of a cover when a battery jar and a cover are thermally bonded, ensuring the strength of the cover before it is fixed to the battery container, and reducing dead space. SOLUTION: A battery jar 1 is partitioned into a plurality of cell chambers 3 with partitions 2, the partition 2 has a first projection 2c and a second projection 2d, the undersurface of a cover 11 is partitioned with a partition 15, the partition 15 has a first recess 15c and a second recess 15d in the lower part, an electrode group 4 is housed in the cell chamber 3, an anode strap 4 and a cathode strap 6 are arranged, an intermediate post 7 stands erect from one side of the strap of at least one hand, the first projection 2c is located between adjoined intermediate posts 7 and higher than the posts, the second projection 2d is located between adjoined, differing polarity straps 5, 6 and higher than these straps, the upper edge of the first projection 2c and the lower edge of the first recess 15c are brought into contact with the upper edge of the second projection 2d and the lower edge of the second recess 15d and thermally boded to them respectively.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a monoblock lead-acid battery used for automobiles and the like.

[0002]

2. Description of the Related Art Monoblock lead-acid batteries are:
As shown in FIGS. 5 and 6, the inside of the battery case 1 is divided into a plurality of cell chambers 3 by partition walls 2, and the electrode groups 4 are housed in each cell chamber 3, and the adjacent electrode groups 4 and 4 are shaded. A partition wall 2 formed by an intermediate pole 7 rising from the anode straps 5 and 6 and an inter-cell connector 8;
Are connected via a through-hole 9 formed in the first hole. The partition 2 has a convex portion 2 b formed at a portion facing the intermediate pole 7, and an upper edge 2 a is higher than the intermediate pole 7 immediately above the through hole 9. In addition, the upper edge 2 a where the convex portion 2 b is not formed is on the same horizontal plane as the upper edge 13 a of the peripheral wall 13.

The terminal pole 10 rises from the strap 5 or 6 of the pole group 4 accommodated in the cell chambers 3 at both ends and is exposed on the upper surface of the lid 11 or, as shown in FIG. Connected to terminal 12. The lid 11 is
It has a peripheral wall 13 of the battery case 1, a downward peripheral wall 14 formed opposite to each partition 2, and each partition 15, and the convex portion 2 of the battery case 2.
A concave portion 15b is formed in each partition wall 15 so as to face b. The lower edges 14a, 15a of the lid 11 are fused and integrated with the opposing peripheral wall 13 of the battery case 1 and the upper edges 13a, 2a of each partition 2.

[0004] Such a lead-acid battery is provided with a partition 15 of the lid 11.
In this case, the convex portion 2a of the battery case partition wall 2 cuts into the space, and the upper space (called dead space) of the pole group 4 can be reduced by the height of the cut, so that the size is reduced.

[0005] The terminal pole 10 has a flange 17, the periphery thereof is covered with a resin 18, and is thermally welded to the lid 11.

In order to make such a battery more compact, the distance between the upper end of the convex portion 2b of the battery case partition 2 and the lower surface 11a of the lid 11 is almost eliminated as shown in FIGS. 6 to the horizontal upper edge 2a of the battery case partition wall 2.
Higher batteries have been proposed. However, in such a battery, as shown in FIG. 9, when the straps of the adjacent pole groups 4 and 4 and the lid partition wall 15 are thermally welded, the hot plate 1
9 had to be inserted to melt the battery case partition 2. At that time, there is a problem that the straps 5 and 6 are melted or deformed by the heat of the hot plate 19.

Also, as shown in FIG.
Is higher than the height of the straps 5 and 6 and the intermediate pole 7 so as to be formed at the same height from the opposing surface of the strap 6 to the opposing surface of the intermediate pole 7. However, the lid attached to such a battery case has a partition wall of the battery case 1.
However, there is a problem that the shape of the partition hardly remains, and the strength is weakened because it is largely scraped off in opposition to the convex portion 2b. Furthermore, when an exhaust chamber or the like is provided in the center of each cell chamber on the back surface of the lid in the vicinity of each partition, when the battery case 1 and the lid are thermally welded, the exhaust chamber or the like is melted or deformed. Had problems.

[0008] The present invention has been made in view of the above problems, and an object thereof is to provide a strap and an exhaust chamber provided on the lower surface of the lid when the battery case and the lid are thermally welded. An object of the present invention is to provide a compact lead-acid battery that is not damaged, secures the strength of a lid before being attached to a battery case, and has a small dead space.

[0009]

In order to achieve the above object, the present invention relates to a lead-acid battery having a battery case 1, a lid 11, and a pole group 4, wherein the battery case 1 has an inside. The partition 2 is divided into a plurality of cell chambers 3, and has a first convex portion 2 c and a second convex portion 2 d on the upper portion of the partition 2.
Reference numeral 1 denotes a lower surface partitioned by a partition wall 15, the partition wall 15 having a first concave portion 15c and a second concave portion 15d at an upper portion, and the pole group 4 is housed in the cell chamber 3, And a cathode strap 5 and an anode strap 6 for connecting the first convex portion 2 to the intermediate pole 7 from one side of at least one of the straps 5 or 6.
c is located between the intermediate poles 7 of the adjacent pole group 4 and is higher than the upper end of the intermediate pole 7, and the second protrusion 2 d is adjacent to the intermediate pole 7. It is located between the straps 5 and 6 having different polarities and is formed higher than the upper surface of the strap 5 or 6.
1 is characterized in that the first convex portion 2c and the first concave portion 15c are heat-welded with the second convex portion 2d and the second concave portion 115d in contact with each other.

Then, a first projection 13c and a second projection 13d facing the first projection 2c and the second projection 2d of the partition 2 are formed on the peripheral wall 13 of the battery case 1. May be.

The first convex portion 2c of the partition 2 and the second convex portion 2c
And / or the first protrusion 13c and the second protrusion 13d of the peripheral wall 13 may be integrated.
In that case, the first convex portion 2c is taller than the second convex portion 2d.

[0012]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments of the present invention will be described with reference to the drawings.

(Embodiment 1) FIG. 1 is a perspective view showing an embodiment of the present invention with a lid removed, and FIG. 2 is a partially cutaway perspective view of the lid of the present invention with its lower surface facing upward. ~ FIG.
The same reference numerals denote the same names.

The battery case 1 has a box shape with an open upper surface, and the inside is partitioned into a plurality of cell chambers 3 by a plurality of partition walls 2. The partition 2 has a first convex portion 2c and a second
Is formed, and the first protrusion 2c is formed with a through hole 9d.
(See FIG. 6) is formed and is taller than the second convex portion 2d. The upper edge of the partition wall 2 excluding the first convex portion 2c and the second convex portion 2d is at the same height as the upper edge of the peripheral wall 13 in the longitudinal direction and is horizontal. The peripheral wall 13 facing the partition wall 2, that is, the peripheral wall 13 in the short direction has a first convex portion 13c and a second convex portion 13d formed on an upper edge, and the first convex portion 2c of the partition wall 2 has a first convex portion 13c and a second convex portion 13d. 2 and has the same height. In each cell chamber 3, a pole group 4 is stored.

The pole group 4 includes a cathode strap 5 for connecting a row of cathodes and an anode strap 6 for connecting a row of anodes.
And Then, the terminal pole 10 is inserted from the side of one of the straps 5 or 6 of the pole group 4 stored in the cell chambers 3 at both ends.
Rise, and the intermediate pole 7 rises from one side of the other strap 6 or 5. Also, the intermediate cell room 3
In each of the straps of the pole group 4 housed in the center pole, the intermediate pole pole 7 stands up from one side.

The intermediate pole 7 is formed on the first projection 2 of the partition 2.
c, which are connected to the adjacent intermediate pole columns 7 of different polarities via the through holes 9 by inter-cell connectors 8 (see FIG. 6).

The strap 5 stored in the end cell chamber 3
And the strap 5 on which the intermediate pole 7 stands up
And 6, the other side faces the first convex portion 13c of the peripheral wall 13,
Strap 5 or 6 where terminal pole 10 stands up
Has one side facing the second projection 13d of the peripheral wall 13 and the other side facing the second projection 2d of the partition 2.

The terminal pole 10 has an L-shape as in FIG. 6. A flange 17 is formed in the middle of the rising portion, and a resin 18 is mounted around the flange 17.
The upper surface of the resin 18 is thermally welded to the lower surface of the lid 11. The upper surface of the terminal pole 10 is connected to the plate-like terminal 12 by welding.

The lid 11 comprises a peripheral wall 13 of the battery case 1 and a partition wall 2.
Corresponding to the first and second projections 13 c and 13 of the battery case peripheral wall 13 at the lower edge of the peripheral wall 14.
d, a first concave portion 14c and a second concave portion 14d are formed, and a lower edge of the partition 15 is opposed to the first convex portion 2c and the second convex portion 2d of the battery case partition 2. 1 concave portion 15c
And a second recess 15d are formed.

Thus, the two recesses 14c and 14d,
If the peripheral wall 14 and the partition wall 15 between and 15c and 15d are formed so as to extend from the lower surface of the lid, if an exhaust chamber or the like is provided in the center of the lower surface of the lid above each cell chamber, it will be separated from the chamber. The tank and lid can be heat welded.

Next, the lid 1 of the above embodiment will be described with reference to FIG.
A method for welding the battery case 1 and the battery case 1 will be described.

First, as shown in FIG. 1, the pole group 4 attached with the straps 5 and 6, the intermediate pole 7, and the terminal pole 10 is stored in each cell chamber 3 of the battery case 1, and the upper edge of the battery case 1 A hot plate 20 having a similar shape is applied to the upper edge of the battery case 1 and melted, and a lower edge of the lid 11 is also melted by the hot plate 20 having a similar shape.

Next, the upper edge of the battery case 1 and the lower edge of the lid 11 are brought into contact with each other, and the molten portion is integrally fixed. At the same time, the upper surface of the resin 18 of the terminal pole 10 and the lower surface of the lid 11 are thermally welded.

(Embodiment 2) FIG. 4 is a perspective view showing another embodiment of the present invention except for a lid, and the same reference numerals as those in FIG. 1 denote the same names.

The battery case partition wall 2 of the present embodiment is formed by integrally connecting the first convex portion 2c and the second convex portion 2d of the first embodiment, and the horizontal upper edge 2a is formed of the second convex portion. The height is higher by one step at the portion 2d and further higher by the first protrusion 2c. Further, the projection 13 of the peripheral wall 13 facing the working surface of the electrode plate
"e" indicates that the first protrusion 13c and the second protrusion 13d in the first embodiment are connected to one another. Correspondingly, the peripheral wall 14 of the lid 11 and the two recesses 14c and 14d, 15c and 15d of the partition wall 15 in FIG. (The lid according to the present embodiment is not shown.) As described above, when the two convex portions and the two concave portions are continuous, the rising edge and the falling edge of the upper edge and the lower edge are reduced, and the lid and the lid are not connected. Since the welded portion of the battery case is shortened, welding defects are reduced. Also, the welding operation is simplified.

The lid 11 attached to such a battery case
Is almost completely provided on the lower surface of the lid where the first concave portion 15c is formed.
Is not left, but a short partition remains on the lower surface of the lid where the second recess 15d is formed, so that the strength of the lid 11 is maintained. In addition, the short partition walls can keep an appropriate distance from the exhaust chamber and the like, so that when the lid and the battery case are thermally welded, the exhaust chamber and the like are not melted or deformed.

[0027]

Since the present invention is configured as described above, the following effects can be obtained.

(1) According to the first aspect, part or all of the height of the strap can be taken into the partition side of the lid, so that dead space is reduced and a compact lead-acid battery can be provided.

(2) According to the first aspect, the convex portion is formed on the battery case partition wall facing the strap and the intermediate pole, and the upper edge of the convex portion is located higher than the strap and the intermediate pole. When the upper edge is melted, the strap and the intermediate pole are not melted or deformed.

(3) According to the first aspect, even if an exhaust chamber or the like is provided at a position facing a partition wall between the first concave portion and the second concave portion, the exhaust chamber or the like is melted or deformed. The lid and the battery case can be welded together without heat.

(4) According to the second aspect, the convex portion is formed on the upper edge of the peripheral wall facing the strap, and the upper edge of the convex portion is higher than the strap, so that when the upper edge is melted, The strap is not melted or deformed. Further, when an exhaust chamber or the like is provided on the lower surface of the lid as in (3) above, when the lower edge of the peripheral wall is melted, the exhaust chamber and the like are not melted or deformed.

(5) According to the third aspect, since the two convex portions of the partition wall and / or the peripheral wall of the battery case are integrated and the welded portion between the battery case and the lid is reduced, the rate of occurrence of poor welding is reduced. Less. Further, since the partition wall remains on the lower surface of the lid where the second concave portion is formed, the strength of the lid is maintained, and the lid and the battery case can be thermally welded while avoiding an exhaust chamber provided on the lower surface of the lid.

[Brief description of the drawings]

FIG. 1 is a perspective view showing an embodiment of the present invention without a lid.

FIG. 2 is a partially cutaway perspective view of the lid of FIG. 1 with the lower surface facing upward.

FIG. 3 is an explanatory diagram illustrating a manufacturing method according to an embodiment of the present invention.

FIG. 4 is a perspective view showing another embodiment of the present invention without a lid.

FIG. 5 is a perspective view showing one embodiment of the related art without a lid.

FIG. 6 is a sectional view taken along line AA of FIG. 5 with a lid attached.

FIG. 7 is a perspective view showing another conventional embodiment without a lid.

FIG. 8 is a sectional view taken along line AA of FIG. 7 with a lid attached.

FIG. 9 is an explanatory view showing a manufacturing method according to another conventional embodiment.

FIG. 10 is a perspective view showing still another conventional embodiment excluding a lid.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Battery case 2 Battery case partition 2c 1st convex part of a battery case partition 2d 2nd convex part of a battery case partition 3 Cell room 4 Pole group 5 Cathode strap 6 Anode strap 7 Intermediate pole 11 Cover 13 Battery case Peripheral wall 13c First convex portion of battery case peripheral wall 13d Second convex portion of battery case peripheral wall 15 Partition wall of lid 15c First concave portion of lid partition 15d Second concave portion of lid partition

 ──────────────────────────────────────────────────続 き Continued on the front page (72) Susumu Tanaka Inventor 6-6 Josaicho, Takatsuki-shi, Osaka Inside Yuasa Corporation

Claims (3)

[Claims] 1. A lead storage battery having a battery case (1), a lid (11), and a pole group (4), wherein the battery case (1) has a plurality of cells formed by partition walls (2). A partition (2) having a first convex portion (2c) and a second convex portion (2d) at an upper portion thereof; and a lower surface of the lid (11) having a partition ( 15), wherein the partition wall (15) has a first concave portion (15c) and a second concave portion (15d) at a lower portion, and the pole group (4) is provided in the cell chamber (3). The intermediate pole (7) is housed and has a cathode strap (5) and an anode strap (6), and an intermediate pole (7) stands up from one side of at least one of the straps (5, 6); Of the pole group (4, 4) adjacent to each other
Between the intermediate poles (7, 7).
The second convex portion (2d) is located between adjacent straps of different polarities (5 and 6), and the upper surface of the strap (5, 6). The battery case (1) and the lid (11) are formed so that the first convex portion (2
c) The upper edge and the lower edge of the second concave portion (15c) are heat-welded with the upper edge of the second convex portion (2d) and the lower edge of the second concave portion (15d) in contact with each other. , Lead-acid batteries. 2. A first projection (2c) and a second projection (2d) of the partition wall (2) on a peripheral wall (13) of the battery case (1).
The first convex portion (13c) and the second convex portion (13
The lead-acid battery according to claim 1, wherein d) is formed. 3. A first projection (2c) and a second projection (2d) of the partition (2) and / or the peripheral wall (13).
The first convex portion (13c) and the second convex portion (13d) are integrated, and the first convex portion (2c) is formed by the second convex portion (2c).
3. The lead-acid battery according to claim 1, which is taller than d).