JPH041652Y2 - - Google Patents

Description

[Detailed description of the invention] [Field of industrial application] The present invention is an improvement of a lead-acid battery having an anode tapered terminal fitting and a cathode tapered terminal fitting whose upper end has a smaller diameter than the anode tapered terminal fitting. It's about.

[Prior Art] In lead-acid batteries for automobiles, etc., the anode tapered terminal fitting and the cathode tapered terminal fitting are formed so that the diameter of the upper end of the cathode tapered terminal fitting is smaller than that of the anode tapered terminal fitting according to international standards. It's becoming like that. As shown in FIG. 2, the conventional anode tapered terminal fitting A of this type of lead-acid battery is constructed by attaching an anode bushing 4a to a truncated conical anode pole 1a with a diameter of a at the tip. be done. The anode bushing 4a is integrally cast into the lid terminal seat 3a of the lid 2 and is formed to protrude from the lid 2. The anode pole 1a is inserted into the hole 4a1 of the anode bushing 4a, and its tip end is welded to the anode bushing 4a.

Further, as shown in FIG. 3, the cathode tapered terminal fitting B is also constructed by attaching a cathode bushing 4b to a truncated conical cathode pole 1b having a diameter b at its tip. The cathode bushing 4b is integrally cast into the lid terminal seat 3b of the lid 2 and is formed to protrude from the lid 2. The cathode pole 1b is inserted into the hole 4b1 of the cathode bushing 4b, and its tip is welded to the cathode bushing 4b. In the conventional lead-acid battery, the diameter a of the tip of the anode pole 1a is made the same as the diameter b of the tip of the cathode pole 1b, and the thickness tb of the cathode bushing 4b is set to the thickness of the anode bushing 4a. By making the thickness smaller than ta, the diameter of the upper end of the cathode tapered terminal fitting B was made smaller than that of the anode tapered terminal fitting A.

[Problems to be solved by the invention] However, in the conventional lead-acid battery described above, the wall thickness tb of the cathode bushing 4b is
Since the wall thickness ta of the cathode bushing 4b was made thinner than the wall thickness ta of the cathode bushing 4b, there was a risk that a melting accident would occur due to excessive current. In addition, with conventional lead-acid batteries,
Diameter dimension a of the tip of the anode pole 1a and cathode pole 1
Since the diameter dimension b of the tip part of b is the same as that of b, there was a risk of misunderstanding the polarity of the pole during battery assembly and incorrectly attaching the bushing. In particular, in this type of lead-acid battery, even if the cells are arranged in the same way, the terminal polarity may be reversed, which makes it easy to misidentify the terminal polarity. It was hot.

An object of the present invention is to provide a lead-acid battery that does not have any parts that are likely to cause a melting accident due to excessive current, and that does not require misunderstanding the polarity of terminals when assembling the battery.

[Means for Solving the Problems] The present invention will be explained with reference to FIGS. 1 and 2 showing an embodiment thereof. It is a lead-acid battery with In the present invention, in the anode tapered terminal fitting A, a truncated conical anode pole 1a is inserted into a hole 4a1 of an anode bushing 4a formed protruding from the lid 2, and the tip of the anode pole 1a and The anode bushing 4a is welded to the anode bushing 4a. In addition, the cathode tapered terminal fitting C has a truncated conical cathode pole 1c inserted into a hole 4c1 of a cathode bushing 4c formed protruding from the lid 2, and the cathode bushing 4c is connected to the tip of the cathode pole 1c. and are welded together. And the diameter dimension of the tip of the pole pole 1c
c is made smaller than the diameter a of the tip of the anode pole 1a, and the wall thickness ta of the cathode bushing 4c is made approximately the same as the wall thickness ta of the anode bushing 4a.

[Function] In the lead-acid battery of the present invention, the diameter c of the tip of the cathode pole 1c is made smaller than the diameter a of the tip of the anode pole 1a, and the wall thickness ta of the cathode bushing 4c is made smaller than that of the anode bushing. Since it is formed to be approximately the same as the wall thickness ta of 4a, it is possible to eliminate parts that are likely to cause meltdown accidents due to excessive current, and there is no risk of misunderstanding the polarity and installing the wrong polarity bushing when assembling the battery. In particular, even in batteries where the arrangement of cells is the same but the polarity of the terminals is reversed, the polarity can be misidentified because the diameter of the tip of the polarity differs between the anode pole and the cathode pole. There is no danger.

[Example] Hereinafter, an example of the present invention will be described with reference to drawings 1 and 2.
This will be explained in detail with reference to the drawings.

The lead-acid battery of the present invention has an anode tapered terminal fitting A having the same structure as the conventional anode tapered terminal fitting A shown in FIG. 2, and a cathode tapered terminal fitting C shown in FIG. There is. The cathode tapered terminal fitting C has a cathode bushing attached to a truncated conical cathode pole 1c whose tip diameter c is smaller than the diameter a of the tip of the anode pole 1a of the anode tapered terminal fitting A. 4c is installed. The cathode bushing 4c is attached to the lid 2 so as to protrude from the lid 2.
The anode bushing 4a is provided with a wall thickness that is approximately the same as the wall thickness ta of the anode bushing 4a.
The cathode pole 1c is connected to the hole 4 of the cathode bushing 4c.
c1, and its top end is welded to the cathode bushing 4c at its upper end. Further, in the cathode tapered terminal fitting C, the vicinity of the tip of the cathode pole 1c is in close contact with the inner wall surface 5 of the cathode bushing 4c, thereby reducing contact resistance.
The upper end of the cathode tapered terminal fitting C is connected to the anode pole 1a.
It has a diameter approximately equal to the sum of the diameter a of the tip of the anode bushing 4a and the length obtained by twice the wall thickness ta of the anode bushing 4a. In addition, the cathode pole 1c
It is desirable that the depth of the welded portion between the cathode bushing 4c and the cathode bushing 4c is 1.5 times greater than that of the conventional welding distance.

According to international standards, the diameter of the upper end of each terminal fitting configured in this way is 16.0 mm for a thick terminal and 16.0 mm for a thin terminal.
11.1 mm, and the diameter of the upper end of the anode tapered terminal fitting A is 17.5 mm for thick terminals and 12.7 mm for thin terminals.
It is said that

[Effects of the invention] As described above, according to the invention, the diameter of the tip of the cathode pole is made smaller than the diameter of the tip of the anode pole, and the thickness of the cathode bushing is made smaller than that of the anode bushing. Since it is formed to have approximately the same thickness, it is possible to eliminate parts that are likely to cause meltdown accidents due to excessive current, and there is no risk of misunderstanding the pole pole of polarity and attaching the wrong polarity bushing when assembling the battery. In particular, even in batteries where the arrangement of the cells is the same but the pole poles of the terminals are reversed in position, the diameter of the tip of the pole poles is different between the anode pole and the cathode pole, so the polarity cannot be changed. There is no risk of misunderstanding.

[Brief explanation of the drawing]

Fig. 1 is a longitudinal sectional view of the cathode tapered terminal fitting of a lead-acid battery according to the present invention, Fig. 2 is a longitudinal sectional view of the anode tapered terminal fitting common to the conventional and the present invention, and Fig. 3 is a longitudinal sectional view of the cathode tapered terminal of the conventional lead-acid battery. FIG. 3 is a vertical cross-sectional view of the metal fitting. 1a... Anode pole, 1b, 1c... Cathode pole,
2... Lid, 3a, 3b... Lid terminal seat, 4a... Anode bushing, 4a1... Hole, 4b, 4c...
... Cathode bushing, 4c1... Hole, 5... Inner wall surface, A... Anode tapered terminal fitting, B, C... Cathode tapered terminal fitting.

Claims (1)

[Scope of claim for utility model registration] Anode tapered terminal fitting A and cathode tapered terminal fitting C
The anode tapered terminal fitting A has a truncated conical anode pole 1a inserted into a hole 4a1 of an anode bushing 4a protrudingly formed on the lid 2, and The tip of the pillar 1a and the anode bushing 4a are welded together, and the cathode tapered terminal fitting C is truncated into the hole 4c1 of the cathode bushing 4c formed protruding from the lid 2. A conical cathode pole 1c is inserted, and the tip of the cathode pole 1c and the cathode bushing 4c are welded, and the diameter of the upper end of the cathode taper terminal fitting C is as described above. It is smaller than the diameter of the upper end of the anode tapered terminal fitting A, and the diameter c of the tip of the cathode pole 1c is smaller than the diameter a of the tip of the anode pole 1a. A lead-acid battery characterized in that the wall thickness ta is approximately the same as the wall thickness ta of the anode bushing 4a.