JP3556422B2 - Lead-acid battery case lid - Google Patents

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a battery case lid for a lead-acid battery used as a power source for electric vehicles and leisure equipment.
[0002]
[Prior art]
As a battery case lid of a conventional lead storage battery used for the above-mentioned applications, a battery having a stud bolt type terminal cast therein is often used. The stud bolt type terminal has a lead bushing which fits a pole extending upward from the electrode plate group in the battery case, and a cross-section in which a plurality of flanges protrude from a peripheral surface of the lead bushing which extends horizontally from a peripheral side surface of the lead bushing. It comprises a round or square rod-shaped lead joint and a bolt-type terminal whose head is cast into the lead joint and protrudes upward.
[0003]
[Problems to be solved by the invention]
However, when the lead joint of the stud bolt type terminal has a circular cross-sectional shape, the height is large, and the thickness of the battery case cover in which the lead joint is cast is large. The height of the covered battery is increased. Further, when the cross-sectional shape is square, the effect of preventing the sulfuric acid electrolytic solution from seeping up at the flange is lower than that of the round shape. If the cross-sectional area is the same as that of a circular one, the strength is reduced. When the cross-sectional area is increased to increase the strength, the weight of the storage battery becomes heavier than in the case of a round shape.
Therefore, a stud bolt type terminal which can solve such a conventional inconvenience, improves the effect of preventing the electrolyte from leaking out, and can reduce the weight and height of the storage battery as compared with the conventional stud bolt type terminal. The development of is desired.
[0004]
[Means for Solving the Problems]
The present invention solves the above-mentioned conventional problems, and a battery case lid for a lead-acid battery that has achieved the above object is a lead-acid battery case with a stud-bolt type terminal cast therein. The cross-sectional shape of a rod-shaped connecting portion having a plurality of flanges protruding from the peripheral surface is formed into an elliptical shape, and is cast with its major axis side horizontal.
[0005]
BEST MODE FOR CARRYING OUT THE INVENTION
A battery case lid of a lead-acid battery according to an embodiment of the present invention will be described with reference to the accompanying drawings.
FIG. 1 is a plan view of a part of a battery case lid into which a stud bolt type terminal which is a main part of the present invention is cast, and FIG. 2 is a cross-sectional view of a side surface of the cast stud bolt type terminal. FIG. 3 is a sectional view taken along line III-III of FIG. 1, and FIG. 4 is a sectional view taken along line IV-IV of FIG.
[0006]
In the drawing, reference numeral 1 denotes a stud bolt type terminal which is a main part of the present invention and is cast when molding the battery case 2 made of synthetic resin of the present invention. The stud bolt type terminal 1 is composed of a lead bushing 3 having a plurality of flanges 3a protruding from a peripheral surface cast in the thickness direction of the lid 2 and a lid 2 extending integrally from a peripheral side surface of the lead bushing 3 in a horizontal direction. A rod-shaped lead joint 4 having a plurality of flanges 4a protruding from a peripheral surface cast so as to extend through the inside of the thickness of the joint, and the upper surface is exposed to the outside integrally with the other part of the joint 4. The head 6a is cast into the lead terminal seat 5 having a plurality of flanges 5a protruding from the peripheral surface cast into the lid 2 and the threaded columnar portion 6b is projected upward from the terminal seat 5. And a bolt-type terminal 6 as described above.
[0007]
According to the present invention, the cross-sectional shape of該鉛coupling portion 4 of the stud bolt type terminal 1 is formed into an elliptical as best seen in FIG. 4, and allowed to position the direction of the major axis L in the horizontal direction, minor It was cast with H in the height direction. Therefore, the plurality of flanges 4a protruding from the peripheral surface also have an elliptical shape, so that the effect of preventing the sulfuric acid electrolyte from seeping out is more improved than that of the conventional joint having a circular or square cross section. Also, since the cross-sectional shape is elliptical, the thickness of the circular joint having the same cross-sectional area can be reduced, and therefore, the thickness of the battery case lid into which it is cast can be made thinner and lighter, and When the battery case lid of the present invention is applied to a battery-containing battery case to form a storage battery, the height of the storage battery can be reduced and the weight of the battery can be reduced.
In the illustrated example, the cross-sectional area of the elliptical joint 4 was 120.1 cm ² , the long L was 18 mm, and the short diameter H was 8.5 mm.
[0008]
【The invention's effect】
As described above, according to the present invention, the connecting portion of the stud bolt type terminal has an elliptical cross-sectional shape and is cast into the battery case lid with its major axis in the horizontal direction, so that the conventional cross-sectional shape is circular or square. When compared to the case where a stud bolt type terminal having a portion is cast, the effect of preventing the electrolyte from bleeding up is improved, a thin and lightweight battery case lid is obtained, and the battery case is built in a battery case with a built-in battery. , Resulting in a low battery.
[Brief description of the drawings]
FIG. 1 is a plan view of a part of a battery case lid into which a stud bolt type terminal of a lead storage battery of the present invention is cast.
FIG. 2 is a sectional view of the lid showing a peripheral side surface of the stud bolt type terminal cast into the lid.
FIG. 3 is a sectional view taken along line III-III of FIG. 1;
FIG. 4 is a sectional view taken along line IV-IV of FIG. 1;
[Explanation of symbols]
REFERENCE SIGNS LIST 1 stud bolt type terminal battery case 2 battery case cover 3 lead bushing 4 coupling part with elliptical cross section 5 lead terminal seat 6 bolt type terminal L major diameter dimension H minor dimension

Claims (1)

In a battery case for a lead-acid battery in which a stud-bolt-type terminal is cast, a cross-sectional shape of a rod-shaped coupling portion having a plurality of flanges protruding on a peripheral surface constituting a part of the stud-bolt-type terminal is made elliptical, A battery case lid for a lead-acid battery, wherein the battery case lid is cast with its major diameter side horizontal.

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