JP2002289156A - Storage battery - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a storage battery having a highly airtight and liquid-tight terminal portion. SOLUTION: The battery comprises: a battery casing (1) provided with a hole (2) through which to insert a conductive terminal (4); an annular projection (3) formed around the hole (2) on the inside wall of the casing (1); a means (5) to tighten the terminal (4); and a terminal base (6), made of deformable conductive material, which is connected to the terminal (4) in the casing (1), wherein the projections (3) is forced to cut into the top surface of the base(6) by tightening the means (5).

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a storage battery having an improved terminal and a method for manufacturing the same.

[0002]

2. Description of the Related Art As is well known, it is important to prevent airtight leakage in a sealed storage battery. In addition, for a storage battery having a fluid electrolyte, prevention of liquid leakage is also an important technical problem. FIG. 1 is a view showing an example of a conventional terminal structure disclosed in Japanese Utility Model Application Laid-Open No. Sho 61-30960, wherein reference numeral 1 denotes a storage battery container, and 2 denotes a terminal formed on an upper portion (lid) of the storage battery container 1. The insertion opening 3 is an annular projection formed around the opening 2 on the inner wall surface of the storage battery container, 4 is a terminal inserted through the opening 2, and 5 is a fastening means mounted on the terminal 4 outside the storage battery container. , 6 are terminal seats connected to the terminals 4 inside the storage battery container.

In this example, the terminal 4 and the terminal seat 6 are formed integrally. The annular projection 3 is pressed against the upper surface of the terminal seat 6 by inserting the terminal 4 into the opening 2 and screwing and tightening a nut 5 serving as a fastening means on a male screw (not shown) formed on the terminal 4. This is to prevent the electrolyte from reaching the terminal portion at that portion.

FIG. 2 shows another conventional example disclosed in Japanese Utility Model Application Laid-Open No. 63-155255, in which 1 is a storage battery container (in the present specification, the storage battery container is also referred to including a cover), and 2 is a storage battery. Terminal insertion opening formed in the upper part (lid) of container 1 is an annular projection formed around opening 2 on the inner wall surface of the storage battery container, 4 is a terminal inserted in the opening, and 5 is a terminal inserted in the opening. Fastening means mounted on the outside of the storage battery container of the terminal,
6 is a terminal seat connected to the end portion 4 inside the storage battery container;
Reference numeral 7 denotes a packing disposed between the upper surface of the terminal seat 6 and the inner wall surface of the storage battery container on which the annular projection 3 is formed.

Also in this example, the terminal 4 and the terminal seat 6 are formed integrally. The terminal 4 formed integrally with the terminal seat 6 is inserted into the opening 2, and a nut 5 serving as a fastening means is screwed and fastened to a male screw portion formed on the terminal 4, whereby the annular projection 3 is attached to the packing 7. This prevents the electrolyte from leaking out of the terminal portion by being pressed and sandwiched between the upper surface of the terminal seat 6 and the inner wall of the storage battery container.

FIGS. 3 and 4 are diagrams showing still another conventional example disclosed in Japanese Patent Application Laid-Open No. 57-87062. FIG.
In the figure, 1 is a storage battery container, 2 is a terminal insertion opening formed in the upper part (lid portion) of the storage battery container 1, and 3 is an annular projection formed around the opening 2 on the inner wall surface of the storage battery container. Reference numeral 4 denotes a terminal to be inserted into the opening. A male screw 5 is formed at a lower portion, and a hexagonal convex portion 8 is formed at an upper portion. Reference numeral 6 denotes a terminal seat disposed inside the storage battery container, and an annular concave portion 9 corresponding to the annular projection 3 is formed on the upper surface thereof.
Are fitted in the annular recess 9 so that they are shown identically). Reference numeral 10 denotes a female screw recess formed on the terminal seat 6 for screwing the screw portion 5 of the terminal 4. Hexagonal projection 8 is sandwiched by a spanner or the like, and male screw 5 is female screw recess 1.
4, the upper surface of the terminal seat 6 and the inner wall surface of the storage battery container having the annular projection 3 come into close contact with each other as shown in FIG.
Thus, airtight leakage and liquid leakage are prevented.

[0007]

However, in the case of the conventional example shown in FIG. 1, there is a problem that the airtightness or liquid tightness is not maintained if there is any unevenness on the upper surface of the terminal seat 6, so that the reliability is inferior. is there. In the case of the conventional example shown in FIG. 2, there is no problem even if there are some irregularities on the upper surface of the terminal seat. There is a problem that a liquid leak or an airtight leak occurs due to this.

3 and 4, the annular projection 3 formed around the opening 2 on the inner wall surface of the storage battery container and the annular recess 9 formed on the upper surface of the terminal seat 6 are securely formed. Since high dimensional accuracy of both is required so as to be fitted into the case, if the dimensional accuracy is slightly inferior, there is a problem that airtight leakage or liquid leakage due to poor fitting is likely to occur. The present invention has been made to solve the above-described problems, and an object of the present invention is to provide a storage battery having a more reliable airtight and liquid-tight terminal portion.

[0009]

According to a first aspect of the present invention, there is provided a storage battery container having an opening for inserting a terminal, and a battery container formed around the opening on the inner wall surface of the storage battery container. An annular protrusion, a conductive terminal inserted through the opening, a fastening means disposed on the terminal, and a terminal seat connected to the terminal inside the storage battery container, which is made of a deformable conductive material. The storage battery is characterized in that the annular projection is configured to bite into the upper surface of the terminal seat by fastening the fastening means.

According to a second aspect of the present invention, there is provided a storage battery according to the first aspect, wherein an elastic body pressed between the inner wall surface of the storage battery container having the annular projection and the upper surface of the terminal seat is disposed. is there.

According to a third aspect of the present invention, there is provided a storage battery container having an opening for terminal insertion and having an annular projection formed around the opening on the inner wall surface of the storage battery container, and a conductive terminal inserted into the opening. By using a fastening means arranged on the terminal and a terminal seat connected to the terminal inside the storage battery container and made of a deformable conductive material, the annular projection is tightened by fastening the fastening means. Characterized in that the first portion is cut into the upper surface of the terminal seat.
It is a method of manufacturing a storage battery according to the invention.

According to a fourth aspect of the present invention, there is provided a storage battery container having an opening for terminal insertion and having an annular projection formed around the opening on the inner wall of the storage battery container, and a conductive terminal inserted into the opening. A fastening means disposed on the terminal, a terminal seat connected to the terminal inside the storage battery container, the terminal seat being made of a deformable conductive material, a storage battery container inner wall surface on which the annular protrusion is formed, and a terminal. A second elastic member disposed on a surface of the terminal seat and tightening the tightening means, thereby causing the annular protrusion to bite into the upper surface of the terminal seat and pressing the elastic member. 4 is a method for manufacturing a storage battery according to the present invention.

[0013]

DESCRIPTION OF THE PREFERRED EMBODIMENTS A storage battery according to a first aspect of the present invention is a storage battery container having a terminal insertion opening, an annular projection formed around the opening on the inner wall surface of the storage battery container, and An inserted conductive terminal, fastening means disposed on the terminal, and a terminal seat connected to the terminal inside the storage battery container, the seat being made of a deformable conductive material; By tightening
It is characterized in that the annular projection is configured to cut into the upper surface of the terminal seat.

FIG. 6 is a diagram showing an embodiment of the present invention.
Reference numeral 2 denotes a terminal insertion opening formed in the upper part (lid) of the storage battery container 1. The storage battery container is generally formed of a polyolefin resin, but a metal may be used (in the case of a metal, an insulating member is provided between a terminal described later). Reference numeral 3 denotes an annular protrusion formed around the opening 2 on the inner wall surface of the storage battery container, and 4 denotes a conductive terminal inserted through the opening 2. Through this terminal, electricity is exchanged between the storage battery and the external device. Reference numeral 5 denotes a fastening means mounted on the terminal 4 outside the storage battery container. In this example, a nut is screwed to a male screw (not shown) formed on the terminal. Reference numeral 6 denotes a terminal seat made of a deformable conductive material and connected to the terminal 4 inside the storage battery container. Although the terminal seat is made of a Pb-0.5% Sn alloy in this example, another deformable conductive material can be used.

In this example, a terminal with a terminal base 41 prepared in advance is set in a mold, and a molten Pb-0.5% Sn alloy is poured around the terminal base 41 to form a terminal 4.
Although the terminal 1 and the terminal seat 6 are integrated, it is also possible to adopt a method in which a male screw portion is formed below the terminal 4 and a female screw portion is also formed in the terminal seat, thereby connecting the two. .
The terminal seat 6 is conductively connected to a not-shown pole plate.

According to the present invention, since the annular projection 3 bites into the upper surface of the terminal seat 6 by tightening the nut 5, even if there is some unevenness on the upper surface of the terminal seat 6, airtightness and liquid tightness are impaired. Never be. In FIG. 6, there is a gap between the inner wall surface of the storage battery container having the annular projection 3 and the upper surface of the terminal seat 6. Reference numeral 11 denotes an annular dam portion formed on the inner wall surface of the storage battery container. The outer peripheral surface 61 of the terminal and the inner wall surface 11 of the annular dam portion are provided.
When it is configured to be in close contact with 1, the airtightness and liquid tightness can be further improved.

The storage battery according to the first invention can be manufactured by the method according to the third invention. That is,
As shown in FIG. 5, a storage battery container 1 having a terminal insertion opening 2 and an annular projection 3 formed around the opening on the inner wall of the storage battery container, and a conductive material inserted into the opening 2 A terminal 3, a fastening means 5 disposed on the terminal, and a terminal seat 6 connected to the terminal 3 inside the storage battery container, which is made of a deformable conductive material and has a flat upper surface. It is preferable that the annular projection 3 be cut into the upper surface of the terminal seat 6 by tightening the tightening means 5 using a screw.

The term “bite” does not mean that an annular concave portion corresponding to the annular projection 3 is formed in advance on the upper surface of the terminal seat 6 and that the two are closely attached to each other. Shall mean the state in which
As long as that is the case, the upper surface of the terminal seat may be flat as shown in FIG. 6 or may be concave. Annular projection 3
Is a design item that can be appropriately selected depending on the material, strength, and the like of the storage battery container and the terminal seat.

The storage battery according to the second invention has the same basic configuration as the storage battery according to the first invention. However, as shown in FIG. Characterized in that an elastic body 9 pressed between the upper surface and the upper surface is disposed. An O-ring or packing can be used as the elastic body 9. The material and size can be appropriately selected according to the storage battery specifications. According to the present invention, not only the airtight holding and the liquid-tight holding at the portion of the annular projection 3 biting into the upper surface of the terminal seat 6 but also the airtight holding and the liquid-tight holding with the pressed elastic body 9 are ensured. More effective.

FIG. 7 is a view showing a method of manufacturing the storage battery according to the second invention. The terminal 4 with the O-ring 9 is inserted into the opening 2 and the tightening means 5 is tightened, so that the annular projection 3 is formed. And cut into the top of the terminal seat 6
The O-ring 9 may be pressed.

In any of the above, other storage battery configurations, such as the electrode configuration and the method of electrically connecting the terminal seats to the electrodes, are irrelevant to the gist of the present invention. .

[0022]

9. In FIG. 9, reference numeral 50 denotes a spirally wound electrode group for a cylindrical sealed lead-acid battery, having a height of about 90 mm and a diameter of about 45 m.
m. 40a is a lead alloy positive electrode strap disposed on the upper end surface of the spiral electrode group 50, 40b is a lead alloy negative electrode strap, 50a is a disk-shaped terminal seat connected to the positive electrode strap 40a, 4a is a positive electrode terminal, 50b Is a disk-shaped terminal seat connected to the negative electrode strap 40b, and 4b is a negative electrode terminal. The terminal, the terminal seat, and the strap are integrally formed by setting an M5 bolt in a mold and pouring a Pb-0.5% Sn alloy. These structures were stored in a low-cylindrical container made of polyolefin resin having an inner diameter of 46 mm and a depth of 110 mm to obtain a semi-finished storage battery.

The positive electrode has a degree of oxidation of 70% (metal lead 30).
%, 70% lead monoxide) and dilute sulfuric acid to obtain an active material paste, and then filling them on both sides of the grid. The negative electrode has an oxidation degree of 70% (metal lead 30%). %, 70% of lead monoxide), a small amount of carbon powder and lignin are added, diluted sulfuric acid is kneaded to obtain an active material paste, and these are filled on both sides of the lattice. These positive electrode 6 and negative electrode 7 are wound via a glass mat separator 5.

Next, as shown in FIG. 5A, a lid having an opening for inserting the positive and negative terminals and having an annular projection formed around the opening on the inner wall of the storage battery container was prepared. The annular projection 3 had a △ -shaped cross section, and the height of the peak was 3 mm.

Next, after attaching to the positive and negative terminals of the semi-finished storage battery a donut-shaped rubber hack having the same outer diameter as the terminal seat, setting the lid, and screwing a washer and a nut to the terminal. Thus, a comparative storage battery similar to the terminal structure of FIG. 2 was obtained. Apart from this, without going through the packing,
As shown in FIG. 6, a storage battery of Example 1 having the same configuration as that of the comparative example was obtained except that the annular projection was cut into the upper surface of the terminal seat. Further, a storage battery was obtained in Example 2 having the same configuration as Example 1 except that a pressed donut-shaped packing was disposed inside the annular projection.

A dilute sulfuric acid aqueous solution was injected under reduced pressure into these storage batteries according to a well-known method, and the battery was formed at a constant current of 0.25 C for 40 hours to obtain a cylindrical sealed lead storage battery having a nominal capacity of 12 Ah. After discharging 20 of each of these cylindrical sealed lead-acid batteries at a discharge rate of 0.2 C, in order to evaluate the cycle life, 1 C discharge (1.7 V end voltage), 1 C constant current × 2.45 V constant. A charge / discharge cycle test of voltage charging (1.5 hours) was performed.

FIG. 10 shows the average number of life cycles excluding those where the test was stopped due to an apparent internal short circuit. Although the cycle life is longer in the order of Example 2, Example 1, and Comparative Example, it is clear that the present invention is effective because the life of the sealed storage battery depends on the airtightness and liquid tightness. .

[0028]

As described above, according to the present invention, airtightness,
A storage battery having a terminal having improved liquid tightness is provided.

[Brief description of the drawings]

FIG. 1 is a diagram showing a conventional example.

FIG. 2 is a diagram showing a conventional example.

FIG. 3 is a diagram showing a conventional example.

FIG. 4 is a diagram showing a conventional example.

FIG. 5 is a diagram showing an example.

FIG. 6 is a diagram showing an example.

FIG. 7 is a diagram showing an example.

FIG. 8 is a diagram showing an example.

FIG. 9 is a diagram showing an example.

FIG. 10 is a view showing test results.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Storage battery container 2 Terminal insertion opening 3 Annular protrusion 4 Terminal 5 Fastening means 6 Terminal seat 9 Elastic body

Claims (4)

[Claims] 1. A storage battery container having a terminal insertion opening,
An annular projection formed around the opening on the inner wall surface of the storage battery container, a conductive terminal inserted into the opening, fastening means disposed on the terminal, and connected to the terminal inside the storage battery container. And a terminal seat made of a deformable conductive material, wherein the annular projection is configured to bite into an upper surface of the terminal seat by fastening the fastening means. 2. The storage battery according to claim 1, wherein an elastic body pressed between the inner wall of the storage battery container having the annular projection and the upper surface of the terminal seat is provided. 3. A storage battery container having a terminal insertion opening and having an annular projection formed around the opening on the inner wall of the storage battery container, a conductive terminal inserted through the opening, By using a tightening means provided and a terminal seat connected to the terminal inside the storage battery container and made of a deformable conductive material, the annular protrusion is fixed to the terminal seat by tightening the tightening means. 2. The method for manufacturing a storage battery according to claim 1, wherein the storage battery is cut into an upper surface. 4. A storage battery container having a terminal insertion opening and having an annular projection formed around the opening on the inner wall of the storage battery container, a conductive terminal inserted through the opening, Fastening means provided, a terminal seat connected to the terminal inside the storage battery container, the terminal seat being made of a deformable conductive material, and a storage battery container inner wall surface having the annular projection formed thereon and a terminal seat upper surface. By using an elastic body disposed therebetween, by tightening the tightening means,
The method for manufacturing a storage battery according to claim 2, wherein the annular protrusion is cut into the upper surface of the terminal seat and the elastic body is pressed.