JP3965661B2 - Lead acid battery - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a monoblock lead-acid battery applied to automobiles and the like.
[0002]
[Prior art and its problems]
As shown in FIGS. 5 and 6, the monoblock type lead-acid battery is divided into a plurality of cell chambers 3 by partition walls 2 inside the battery case 1, and the electrode groups 4 are accommodated in the cell chambers 3 and are adjacent to each other. The pole groups 4 and 4 are connected to the intermediate pole column 7 rising from the cathode / anode straps 5 and 6 through the through-hole 9 formed in the partition wall 2 by the inter-cell connector 8. In the partition wall 2, a convex portion 2 b is formed at a portion facing the intermediate pole column 7, and the upper edge 2 a is higher than the intermediate pole column 7 directly above the through hole 9. Further, the upper edge 2 a of the part where the convex part 2 b is not formed is on the same horizontal plane as the upper edge 13 a of the peripheral wall 13.
[0003]
The terminal pole 10 rises from the strap 5 or 6 of the pole group 4 housed in the cell chamber 3 at both ends and is exposed on the upper surface of the lid 11 or is connected to the flat terminal 12 on the upper surface of the lid 11 as shown in FIG. It is connected. The lid 11 has a downward peripheral wall 14 formed opposite to the peripheral wall 13 of the battery case 1 and each partition wall 2, and each partition wall 15. The cover 11 faces the convex portion 2 b of the battery case 2 to each partition wall 15. A recess 15b is formed. The lower edges 14a and 15a of the lid 11 are fused and integrated with the peripheral wall 13 of the opposing battery case 1 and the upper edges 13a and 2a of each partition wall 2.
[0004]
Such a lead-acid battery has a shape in which the convex portion 2a of the battery case partition 2 bites into the partition wall 15 of the lid 11, and the upper space (referred to as dead space) of the pole group 4 is reduced by the height of the bite. It was made compact.
[0005]
In addition, the terminal pole 10 is formed with a flange 17, the periphery of which is covered with a resin 18, and is thermally welded to the lid 11.
[0006]
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 wall 2 and the ceiling lower surface 11a of the lid 11 is almost eliminated as shown in FIGS. Has been proposed that has a height higher than that of the horizontal upper edge 2a of the battery case partition wall 2. However, in such a battery, when the straps of adjacent pole groups 4 and 4 and the cover partition 15 are heat-welded as shown in FIG. 2 had to be melted. 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.
[0007]
Further, as shown in FIG. 10, the convex part 2 b of the partition wall 2 of the battery case 1 is made higher than the height of the straps 5, 6 and the back of the intermediate pole 7, and the surface of the strap 6 is opposed to the intermediate pole 7. Some of them are formed at the same height up to the surface. However, such a lid attached to the battery case has a problem that the partition wall is greatly scraped away from the convex portion 2b of the battery case 1, so that the shape of the partition wall hardly remains and the strength is weakened. Was. Furthermore, when an exhaust chamber or the like is provided in the central portion of each cell chamber on the back surface of the lid and close to each partition wall, 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 its object is to damage the exhaust chamber provided on the strap or the lower surface of the lid when heat-welding the battery case and the lid. It is another object of the present invention to provide a compact lead-acid battery that ensures the strength of the lid before being attached to the battery case and has a small dead space.
[0009]
[Means for Solving the Problems]
In order to achieve the above object, the present invention provides a battery case 1 having an interior partitioned into a plurality of cell chambers 3 by a partition wall 2 having a first convex portion 2c and a second convex portion 2d at the top, A lid 11 having a first concave portion 15c corresponding to the partition wall 2 and facing the first convex portion 2c and a second concave portion 15d facing the second convex portion 2d, and accommodated in the cell chamber 3 A lead storage battery having a pole group 4, the pole group 4 having the cathode strap 5 and the anode strap 6, and having an intermediate pole column 7 at one end of the strap, The adjacent cell chambers 3 are accommodated in the cell chamber 3 such that the upper end of the intermediate pole 7 is lower than the upper end of the first convex portion 2c and the upper surface of the strap is lower than the upper end of the second convex portion 2d. The straps of different polarities of the pole group 4 housed in the intermediate pole column 7 via the first protrusion 2c The opposite ends of the first electrode 2 are opposed to each other, the other ends not having the intermediate pole 7 are opposed to each other via the second protrusion 2d, the intermediate poles 7 are connected to each other, and the first protrusion 2c The first concave portion 15c is fitted, the second convex portion 2d and the second concave portion 15d are fitted, and heat welding is performed.
[0010]
And even if the 1st convex part 13c and the 2nd convex part 13d which oppose the 1st convex part 2c and the 2nd convex part 2d of the said partition 2 are formed in the surrounding wall 13 of the said battery case 1. FIG. Good.
[0011]
Further, the second convex portion 2d may be provided above the partition wall 2, and the first convex portion 2c may be provided above the second convex portion 2d.
[0012]
DETAILED DESCRIPTION OF THE INVENTION
Embodiments of the present invention will be described with reference to the drawings.
[0013]
(Embodiment 1)
FIG. 1 is a perspective view showing an embodiment of the present invention with the lid removed, and FIG. 2 is a partially cutaway perspective view of the lid of the present invention with the lower surface facing upward, having the same reference numerals as in FIGS. Indicates the same name.
[0014]
The battery case 1 has a box shape with an upper surface opened, and the inside is partitioned into a plurality of cell chambers 3 by a plurality of partition walls 2. The partition wall 2 is formed with a first protrusion 2c and a second protrusion 2d on the upper edge, and the first protrusion 2c is formed with a through hole 9 (see FIG. 6) to form a second protrusion. It is taller than 2d. Further, the upper edge of the partition wall 2 excluding the first convex part 2c and the second convex part 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, is formed with a first convex portion 13c and a second convex portion 13d on the upper edge, and the first convex portion 2c of the partition wall 2 and the first convex portion It faces the convex part 2d of 2 and has the same height. In each cell chamber 3, a pole group 4 is housed.
[0015]
The pole group 4 includes a cathode strap 5 that connects cathode ear rows and an anode strap 6 that connects anode ear rows. A terminal pole column 10 rises from the side surface of one strap 5 or 6 of the pole group 4 housed in the cell chamber 3 at both ends, and an intermediate pole column 7 rises from one side of the other strap 6 or 5. In addition, in both straps of the pole group 4 housed in the intermediate cell chamber 3, an intermediate pole column 7 rises from one side.
[0016]
The intermediate pole 7 faces the first protrusion 2c of the partition wall 2 and is connected by the interpolar connecting body 8 (see FIG. 6) with the opposite polarity intermediate pole 7 adjacent to each other through the through hole 9. Has been.
[0017]
Of the straps 5 and 6 housed in the end cell chamber 3, the straps 5 and 6 with the intermediate pole 7 rising are facing the first convex portion 13 c of the peripheral wall 13 on the other side, and the terminal pole 10 is rising. One side of the strap 5 or 6 facing the second convex portion 13 d of the peripheral wall 13 faces the second convex portion 2 d of the partition wall 2.
[0018]
The terminal pole 10 is L-shaped as in FIG. 6, and a flange 17 is formed in the middle of the rising portion, and a resin 18 is attached 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.
[0019]
The lid 11 has a peripheral wall 14 and a partition wall 15 corresponding to the peripheral wall 13 and the partition wall 2 of the battery case 1, and a first protrusion 13 c and a second protrusion of the battery case peripheral wall 13 are formed at the lower edge of the peripheral wall 14. A first concave portion 14c and a second concave portion 14d facing the portion 13d are formed, and the lower edge of the partition wall 15 is opposed to the first convex portion 2c and the second convex portion 2d of the battery case partition wall 2. A first recess 15c and a second recess 15d are formed.
[0020]
Thus, if the peripheral wall 14 and the partition wall 15 between the two recesses 14c and 14d, and 15c and 15d are extended from the bottom surface of the lid, an exhaust chamber or the like is provided at the center of the bottom surface of the lid above each cell chamber. If so, the battery case and lid can be heat welded away from the chamber.
[0021]
Next, a method of welding the lid 11 and the battery case 1 according to the above embodiment will be described with reference to FIG.
[0022]
First, as shown in FIG. 1, each cell chamber 3 of the battery case 1 accommodates the pole group 4 attached with the straps 5 and 6, the intermediate pole 7 and the terminal pole 10, and has the same shape as the upper edge of the battery case 1. While the applied hot plate 20 is applied to the upper edge of the battery case 1 and melted, the lower edge of the lid 11 is also melted by the hot plate 20 having the same shape.
[0023]
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 melted portions are 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.
[0024]
(Embodiment 2)
FIG. 4 is a perspective view showing another embodiment of the present invention excluding the lid, and the same reference numerals as those in FIG. 1 denote the same names.
[0025]
The battery case partition 2 of the present embodiment is such that the first convex portion 2c and the second convex portion 2d in the first embodiment are integrally connected, and the horizontal upper edge 2a is the second convex portion 2d. The height is further raised, and the height is further raised by the first convex portion 2c. Moreover, the convex part 13e of the surrounding wall 13 which faces the working surface of an electrode plate is the 1st convex part 13c in Embodiment 1, and the 2nd convex part 13d which continued. Correspondingly, the peripheral wall 14 of the lid 11 in FIG. 2 and the two recesses 14c and 14d of the partition wall 15 and 15c and 15d are also integrally connected. (The lid of this embodiment is not shown)
In this way, assuming that the two convex portions and the two concave portions are connected, the rising and falling diagonal portions of the upper edge and the lower edge are reduced, and the welded portion of the lid and the battery case is shortened. Welding defects are reduced. Also, the welding work is simplified.
[0026]
The lid 11 attached to such a battery case has almost no partition wall 2 on the bottom surface of the lid where the first recess 15c is formed, but a short partition wall on the bottom surface of the lid where the second recess 15d is formed. Since it will remain, the intensity | strength of the lid | cover 11 is maintained. In addition, the short partition wall can maintain an appropriate distance from the exhaust chamber and the like, and the heat exhaust chamber and the like are not melted or deformed when the lid and the battery case are thermally welded.
[0027]
【The invention's effect】
Since this invention is comprised as mentioned above, there exists an effect described below.
[0028]
(1) According to the first aspect, part or all of the height of the strap can be taken into the partition wall side of the lid, so that dead space is reduced and a compact lead-acid battery can be provided.
[0029]
(2) According to claim 1, since the convex part is formed in the battery case partition facing the strap and the intermediate pole, and the upper edge of the convex part is higher than the strap and the intermediate pole, the upper edge When melting, the strap and the intermediate pole are not melted or deformed.
[0030]
(3) According to claim 1, even if an exhaust chamber or the like is provided at a position facing the partition wall between the first recess and the second recess, the lid is not melted or deformed. And the battery case can be heat-welded.
[0031]
(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. Therefore, when the upper edge is melted, Does not melt or deform. Further, when an exhaust chamber or the like is provided on the lower surface of the lid as in the case (3), the exhaust chamber or the like is not melted or deformed when the lower edge of the peripheral wall is melted.
[0032]
(5) According to claim 3, 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. Further, since the partition wall remains on the lower surface of the lid in which the second recess is formed, the strength of the lid is maintained, and the lid and the battery case can be thermally welded while avoiding the 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 bottom surface facing upward.
FIG. 3 is an explanatory diagram showing a manufacturing method according to an embodiment of the present invention.
FIG. 4 is a perspective view showing another embodiment of the present invention excluding a lid.
FIG. 5 is a perspective view showing a conventional embodiment with a lid removed.
6 is a cross-sectional view taken along the line AA of FIG. 5 with a lid attached.
FIG. 7 is a perspective view showing another conventional embodiment with the lid removed.
8 is a cross-sectional view taken along line AA of FIG. 7 with a lid attached.
FIG. 9 is an explanatory view showing a manufacturing method of another conventional embodiment.
FIG. 10 is a perspective view showing still another conventional embodiment with the lid removed.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Battery case 2 Battery case partition 2c Battery case partition 1st convex part 2d Battery case partition 2nd convex part 3 Cell chamber 4 Electrode group 5 Cathode strap 6 Anode strap 7 Intermediate pole 11 Lid 13 Battery case Peripheral wall 13c First convex portion 13d of battery case peripheral wall Second convex portion 15 of battery case peripheral wall 15 Lid of partition wall 15c First concave portion of lid partition wall 15d Second concave portion of lid partition wall

Claims (3)

A battery case (1) having an interior partitioned into a plurality of cell chambers (3) by a partition wall (2) having a first protrusion (2c) and a second protrusion (2d) at the top; 2) and a lid (11) having a first concave portion (15c) facing the first convex portion (2c) and a second concave portion (15d) facing the second convex portion (2d). And a pole group (4) housed in the cell chamber (3),
The pole group (4) includes the cathode strap (5) and the anode strap (6), and includes an intermediate pole column (7) at one end of the strap, and the intermediate pole column (7). ) Is accommodated in the cell chamber (3) and adjacent to each other such that the upper end of the strap is lower than the upper end of the first protrusion (2c) and the upper surface of the strap is lower than the upper end of the second protrusion (2d). The different polarity straps of the pole group (4) accommodated in the cell chamber (3) are arranged so that the ends having the intermediate pole column (7) are opposed to each other via the first convex part (2c), and the second The other ends not having the intermediate pole column (7) are opposed to each other via the projection (2d), the intermediate pole columns (7) are connected to each other, and the first projection (2c) and the first The recess (15c) is fitted and the second projection (2d) and the second recess (15d) are fitted and heat-welded. And,
Lead acid battery.   On the peripheral wall (13) of the battery case (1), the first protrusion (13c) is opposed to the first protrusion (2c), and the second protrusion (2d) is opposed to the second protrusion (2d). The lead acid battery according to claim 1, wherein a convex portion (13d) is formed. The battery case (1) has a protrusion (13e) on the upper part of the peripheral wall (13), a second protrusion (2d) on the upper part of the partition wall (2), and an upper part of the second protrusion (2d). The lead storage battery according to claim 1 , further comprising a first protrusion (2c).

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