JPH08329923A - Lead-acid battery - Google Patents

Abstract

PURPOSE: To provide a lead-acid battery having high durability to vibration by increasing the strength of an electrode pole for interconnection of cells. CONSTITUTION: At least two of ribs 2 are successively formed along the height direction of a cylindrical pole 1 in the circumferential face of an electrode pole for interconnection of cells and the width (m) of the cross section surface area of the ribs 2 and the projected length (l) of the ribs are adjusted to be (0.04-0.2) and (0.1-0.3) to the diameter k1 of the electrode pole 1, respectively, to make a lead-acid battery highly durable to vibration.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an improvement of a pole for connecting cells of a lead storage battery.

[0002]

2. Description of the Related Art Generally, in a lead-acid battery, inter-cell connection by an over-partition system is performed by using an inter-cell connecting pole 5 provided in an electrode plate group 3 as shown in FIG. After connecting the cells, when the battery case 7 and the inner lid 4 are bonded with the adhesive 6, at the same time, they are integrated with the inner lid 4 while being embedded in the adhesive 6. At this time, the connecting pole 5 used has a simple columnar shape 1 as shown in FIG. 3, and the lower end thereof is the upper surface of the shelf 9 for integrally welding the ears 8 of the polar plate. Was installed in.

[0003]

However, in recent years, lead-acid batteries, especially sealed lead-acid batteries, have been increasingly used in places with severe vibration such as radios and electric lawnmowers mounted on automobiles. In such a situation of use, if the poles are cylindrical in shape, they are fixed to the shelf 9 at the lower end when vibration is applied in a direction of about 90 ° with respect to the standing direction of the poles. The part will move as a fulcrum. For this reason, excessive force acts on the pole 5 and the pole 5 is easily cut at the joint (A) with the inner lid 4 and the base (B) of the pole shown in FIG. 2, and many defects are caused by this. Has become.

The present invention is intended to solve such problems, and an object thereof is to provide a lead storage battery which is resistant to vibration.

[0005]

In order to solve the above problems, the present invention provides two or more poles in the height direction from the root of the pole of the pole when connecting poles for connecting cells to the rack. The rib is integrally formed, and the rib has a width (m) of 0.04 to 0.2 when the diameter (k) of the pole is 1, and a forward protruding length (l) of the rib. The ratio of (k) is 0.1 to 0.3.

[0006]

As described above, by forming continuous ribs in the columnar portion of the pole column in the height direction, the stress during casting of the pole column is released to the ribs, and cracks that tend to occur at the base of the columnar portion are prevented. At the same time, the strength of the base of the cylinder is increased. Moreover, since the cross-sectional area of the pole is increased and the ribs are continuously formed in the height direction, not only the base of the pole as shown in FIG. Since it is also reinforced, the two points that form the fulcrum become strong even during vibration. Therefore, the lead storage battery has durability against the vibration applied from the direction perpendicular to the height direction of the pole.

[0007]

Embodiments of the present invention will be described below.

As shown in FIG. 1, a column 1 having a diameter of 5 mm is provided at the center of a shelf 9 to which the ears 8 of the same polar plate are welded. The diameter of the cylinder 1 is (k), and the projection lengths (l) are 0.1, 0.5, 1.0, at equal intervals on the circumferential surface of the cylinder 1.
1.5 mm, width (m) is 0.1, 0.2, 0.5, 1.
Two 0 mm ribs 2 were formed. A battery having a voltage of 6 V and a nominal capacity of 3.0 AH was experimentally manufactured using this and a conventional pole column having no rib 2, that is, 0 in both (l) and (m). At this time, the distance from the base of the pole 9 to the shelf 9 to the joint with the inner lid 4 was all 15 mm. Then, in order to make the condition of a fully charged battery stricter than the vibration test method according to the usual JIS standard, a vibration with an amplitude of 8 mm and a vibration frequency of 50 times / min, which is twice the standard amplitude, is used as x, y , 50 vibration tests were performed on each z axis for 60 minutes, and it was evaluated whether or not the pole column was broken.

The results are shown in (Table 1). In Table 1, 1 = 0 and m = 0 indicate the result of using the conventional columnar pole. From this result, m = 0.1 mm, l =
It was found that breakage did not occur except for the combination of 0.1 to 1.5 mm.

From these results, the width (m) of the rib is 0.04 or more with respect to the diameter (k) of the cylindrical portion, and the length (l) of the protruding portion of the rib is the diameter (k) of the cylindrical portion. It has been found that a ratio of 0.1 or more with respect to 1 is sufficient. Preferably (m) is 0.04 to 0.2 with respect to (k), (l)
Is 0.1 to 0.3. The diameter (k) of the column is 3 ~
When the ratio of (m) and (l) was within the range of 15 mm, the vibration test was conducted under the vibration condition causing breakage, and similarly good results were obtained. In addition, the distance from the base of the pole to the joint of the inner lid is 20 to 30 m.
The same result was obtained when a similar test was performed when the length was increased to m. Although the number of ribs is two in this embodiment, it may be three or more.

[0011]

[Table 1]

[0012]

As described above, by using the pole column with the rib of the present invention in which the width and the protruding length of the rib are defined, the strength of the pole column of the conventional cylindrical shape is increased, and it is strong against vibration and reliable. It is possible to obtain a lead storage battery having a high price.

[Brief description of drawings]

FIG. 1 is a diagram showing a pole shape according to the present invention.

FIG. 2 is a cross-sectional view showing a lead-acid battery in which cells are connected by inter-cell connection poles.

FIG. 3 is a diagram showing a conventional pole column shape.

[Explanation of symbols]

 1 Cylindrical part of a pole 2 Rib 3 Pole plate group 4 Inner lid 5 Pole pillar 6 Adhesive 7 Battery case 8 Ear of pole plate 9 Shelf for connection

Claims (1)

[Claims] 1. A pole column for connecting cells is provided on a shelf welded to the ears of the same polarity electrode plate, and the pole column is formed with two or more ribs continuous in the height direction from the root of the shelf. The width (m) of this rib is 0.04 to 0.2 when the diameter (k) of the pole is 1, and the protruding length (l) is (k). The lead storage battery is characterized by having a ratio of 0.1 to 0.3.