KR20030044813A - Storage battery - Google Patents

Abstract

PURPOSE: A storage battery is provided, to prevent the damage of the conductive function between a terminal and the pole plate even if an outside force is applied to the terminal by employing a rotation stop means. CONSTITUTION: The storage battery comprises a first terminal member(1) provided with a threaded part(13) at the top face, and a second terminal member made of a metal, embedding the leg part of the first terminal member. The first terminal member(1) is provided with a rotation stop means at the top part which is not embedded in the second terminal member. Preferably the rotation stop means is asymmetric to the central axis of the thread part(13) of the first terminal member. Preferably the step portion at the boundary of the top part and the leg part of the first terminal member(1) is tapered or is made nearly in arc shape.

Description

Storage battery {STORAGE BATTERY}

The present invention relates to a storage battery, in particular a sealed storage battery, characterized by the terminal portion.

Recently, in order to facilitate the installation of batteries, batteries having a bolt or a nut at the terminal portion of the battery have been increasing. For example, Patent Literature 1 describes a terminal having a structure in which a terminal member having a screw hole is fitted into a terminal portion on an upper shelf connecting a pole plate.

[Patent Document 1]

Japanese Patent Laid-Open No. 9-245764 (FIG. 3, FIG. 2)

3 is a perspective view showing the structure of a first terminal member according to a conventional lead acid battery, and FIG. 4 is a sectional view of the vicinity of a terminal of a lead acid battery using the terminal member of FIG. 3.

In FIG. 4, the ear part 103 of the pole plate of each cell in a rolling tank is a shelf part of the 2nd terminal member 102 made of the lead alloy which embedded the copper 1st terminal member 101 in the head part. Is bonded to. On the other hand, a lead alloy bushing 105 for fitting the second terminal member 102 is formed in the rolled lid 104 serving as a lid of the lead storage battery. Therefore, after joining the 2nd terminal member 102 in which the 1st terminal member 101 was embedded to the ear part 103 of the pole plate of each cell, the roll cover 104 is covered with a roll (not shown), The second terminal member 102 is fitted to the bushing 105.

At this time, the first terminal member 101 is exposed on the roll cover 104. After adhering to the rolling cover 104 (not shown), the head part of the second terminal member 102 and the bushing 105 are heated and welded with a burner to form a welding portion 106 to form the welding portion 106 by the rolling cover 104. Fix it. It seals by injecting and hardening filler 107, such as an epoxy resin, from the upper part of this welding part 106.

As shown in FIG. 3, the 1st terminal member 101 consists of the large diameter part 111 of the upper part, and the small diameter part 112 of the lower part, and the large diameter part 111 is the screw part 113 in the apex surface. The small diameter portion 112 is embedded in the second terminal member 102 made of lead alloy. Moreover, the small diameter part 112 is provided with the pair of notch 114 which opposes rotation prevention. In addition, prior to embedding the first terminal member 101 in the second terminal member 102, solder plating is performed on the first terminal member 101, whereby fusion with the lead alloy (weldability with the lead alloy) is satisfactorily achieved. do.

In order to embed this first terminal member 101 in the second terminal member 102, an insert for forming the second terminal member 102 by inserting a molten lead alloy melted into a mold supported by the first terminal member 101; Molding is generally carried out.

However, in the small diameter part 112 of the 1st terminal member 101 in which the anti-rotation cutout 114 as shown in FIG. 3 was formed, many each part exists in the small diameter part 112 of a 1st terminal member, By the viscosity of the melted lead alloy, the lead alloy is not surely formed in the shape of the terminal member 101. It is easy to cause so-called hot water circulation failure. When the hot water circulation failure occurs, the first terminal member and the second terminal member are likely to cause poor contact, the conductivity from the terminal to the electrode deteriorates, and constant quality cannot be maintained.

As the first terminal member 101 and the second terminal member 102, metals having different melting points are used. This is for preventing the 1st terminal member 101 from deforming when the molten metal which melt | dissolved metal was put into the mold which set the 1st terminal member for insert molding. Therefore, in the first terminal member 101 and the second terminal member 102, metals having different electrical conductivity are used, and variations in electrical conductivity from the terminals to the electrodes are likely to occur. In addition, since the small diameter portion 112 of the first terminal member 101 is not equidistant from the central axis by the anti-rotation cutout 114 of the first terminal member, there is a variation in electrical conduction from the terminal to the electrode. Generated, the conductivity is not good.

The present invention has been made to solve the problems of the prior art, and an object of the present invention is to provide a storage battery having a terminal for maintaining a rotation preventing function without impairing the conduction efficiency.

1 is a perspective view showing the structure of a first terminal member of a lead acid battery according to an embodiment of the present invention.

FIG. 2 is a cross-sectional view of a terminal vicinity of a lead acid battery using the first terminal member shown in FIG. 1. FIG.

3 is a perspective view showing the structure of a first terminal member related to a conventional lead acid battery.

4 is a cross-sectional view of the vicinity of a terminal of a lead acid battery using the terminal member of FIG. 3.

5 is a cross-sectional view of a terminal vicinity of a storage battery according to an embodiment of the present invention.

Explanation of symbols on the main parts of the drawings

1, 1 ': first terminal member 2: second terminal member

4: roll cover 7: filler

8: terminal portion 11, 11 ': head portion of first terminal member

12, 12 ': Leg portions of the first terminal member 13, 13': Thread portion

14, 14 ': fall prevention portion 15: taper

16: the portion whose cross section is approximately arc-shaped

A storage battery according to the present invention is a storage battery having a terminal portion in which a vertex surface is exposed to the outside from a roll cover, wherein the terminal portion is a first terminal member made of metal having a screw portion in the vertex surface, and a leg of the first terminal member. It is provided with the metal 2nd terminal member which embeds a part, and a 1st terminal member is equipped with a rotation prevention means in the head part which is not embedded in the 2nd terminal member.

According to the storage battery according to the present invention, when the leg portion of the first terminal member is embedded in the second terminal member, the terminal portion of the storage battery is formed, and the vertex surface of the first terminal member including the screw portion is exposed from the roll cover of the storage battery. Moreover, rotation prevention means is provided in the head part of the 1st terminal member which is not embedded in the 2nd terminal member.

Therefore, the anti-rotation means is attached to the head of the first terminal member rather than the junction with the second terminal member to secure the anti-rotation function, while the anti-rotation means is a leg of the first terminal member that is the junction with the second terminal member. No need to install on Thereby, when embedding the leg part of the 1st terminal member in a 2nd terminal member, the flow of the molten metal melt | dissolved by the rotation preventing means is not obstructed, and metal flows smoothly, It is possible to prevent the deterioration of the conduction efficiency at the terminal portion, thereby keeping the quality of the storage battery constant.

Moreover, in the storage battery which concerns on this invention, since the shape of the leg part of the 1st terminal member which is a junction part with a 2nd terminal member can be formed equidistant with respect to the central axis of a 1st terminal member, the deviation of electric conduction generate | occur | produces. It is difficult to make it possible to improve the conduction efficiency.

In addition, the screw part provided in the vertex surface of a 1st terminal member may be a female screw opened to the vertex surface, and may be a male screw provided upward from the vertex surface of a 1st terminal member.

Examples of the storage battery include lead storage batteries. For example, copper or a copper alloy can be used for the first terminal member, and lead or lead alloy can be used, for example, for the second terminal member.

The first terminal member is preferably configured to include a fall prevention means in the leg portion. According to such a structure, it can prevent that a 1st terminal member falls out from a 2nd terminal member.

In addition, the rotation preventing means is preferably configured to have an outer shape which is asymmetrical with respect to the central axis of the screw portion of the first terminal member. According to such a structure, since the rotation prevention means can be formed without using another member, a 1st terminal member can be manufactured with few component points. Here, as a shape asymmetrical with respect to the central axis of the screw portion, all shapes other than round circles such as hexagons, ellipses, and the like, and round circles whose centers are shifted from the central axis of the screw portions can be applied.

Preferably, the rotation preventing means is fixed by a resin filled in the gap between the roll cover and the first terminal member. According to such a structure, both the sealing and anti-rotation function can be shown simultaneously in the resin for sealing the formed terminal part and a rolling cover, and a storage battery can be manufactured easily. Herein, epoxy resin may be applied as the resin.

Embodiment of the invention

EMBODIMENT OF THE INVENTION Hereinafter, one Embodiment of this invention is described taking an example of a lead acid battery, referring an accompanying drawing. FIG. 1A is a perspective view showing the structure of a first terminal member of a lead acid battery according to an embodiment of the present invention, and FIG. 2A is a view of a lead acid battery using the first terminal member shown in FIG. It is sectional drawing of the terminal part vicinity.

As shown in Fig. 2 (a), the ear portion 3 of the pole plate of each cell in the roll is made of a lead alloy made by embedding the first terminal member 1 made of copper shown in Fig. 1 in the head portion. 2 is welded to the shelf of the terminal member 2. In this manner, the melting point of the metal of the first terminal member 1 and the metal of the second terminal member 2 are lower than the melting point of the metal of the first terminal member 1. It is preferably an electrically conductive metal.

The use of lead or lead alloy as the metal of the second terminal member 2 is for matching with the lead portion 3 of the pole plate of each cell because the lead portion or lead alloy is lead or lead alloy.

In addition, the use of a metal having a higher melting point than that of the second terminal member as the metal of the first terminal member 1 has the purpose of securing the bonding strength to the mating terminal by exposing its apex surface to the outside, which will be described later. A metal having good electrical conductivity as a terminal after achieving the object of not melting the first terminal member 1 when the metal for the second terminal member 2 melted for insert molding is put into a mold having the first terminal member. Because this is required.

On the other hand, in the lead cover 14 of the lead acid battery, a bushing 5 made of a lead alloy for fitting the second terminal member 2 is formed in advance. Therefore, after welding the 2nd terminal member 2 in which the 1st terminal member 1 was embedded in the ear part 3 of the pole plate of each cell, the roll cover 4 is covered with a roll (not shown), The second terminal member 2 is fitted to the bushing 5.

At this time, the apex surface of the 1st terminal member 1 is exposed on the rolling lid 4. After the roll cover 4 is adhered to the roll (not shown), the head part and the bushing 5 of the second terminal member 2 are heated with a burner and welded to form a weld 6. Thereby, the terminal part 8 is fixed to the roll cover 4. Filler 7, such as an epoxy resin, is injected from the upper portion of the welded portion 6, and the resin is cured and sealed to prevent leakage of the electrolyte in the precursor to the outside. Here, the head part 11 of the 1st terminal member may be formed so that it may protrude from the rolling lid 4, as shown to Fig.2 (a).

As shown to Fig.1 (a), the 1st terminal member 1 is comprised by the head part 11 of a 1st terminal member, and the leg part 12 of a 1st terminal member. The head portion 11 of the first terminal member has a screw hole as the screw portion 13 on its vertex surface.

The head portion 11 of the first terminal member is provided with rotation preventing means having a hexagonal cross section. This anti-rotation means fixes the circumference with a filler such as epoxy resin, which is a curable resin, so that the first terminal member 1 is rotated together with the mating terminal when the mating terminal is screwed to the threaded portion 13. prevent. As shown in Fig. 1 (a), the head portion 11 of the terminal member is thicker than the leg portion 12, and the distance from the central axis of the screw portion 13 on the side of the head portion is the central axis of the screw portion on the side of the leg portion. Longer than distance from Therefore, in the storage battery provided with the rotation prevention means in the head part like the storage battery which concerns on this invention, compared with the battery provided with the rotation prevention means in the leg part shown in FIG. 4 as an example of the conventional battery, The advantage is that the torque can be received with less force. In the case of the storage battery according to the present invention, even when a torque of rotation is applied to the screw portion, an external force can be prevented from being applied to the joint surface of the terminal member 1 and the terminal member 2 or can be remarkably reduced.

In addition, the cross-sectional shape of the rotation preventing means does not have to be a hexagon as shown in Fig. 1A, and the rotation preventing means is formed even in a round shape if the central axis of the screw portion 13 and the central axis of the rotation preventing means are displaced. The function as can be achieved, and if it is polygonal or elliptical shape, the function as a rotation preventing means can be achieved irrespective of the position with respect to the central axis of the screw part 13.

The leg 12 of the first terminal member is embedded in the second terminal member 2 made of lead alloy, as shown in FIG. It is formed by insert molding which forms the 2nd terminal member 2 by putting the lead alloy melt | dissolved in the mold by which the 1st terminal member 1 was supported. Further, prior to embedding the first terminal member 1 in the second terminal member 2, the first terminal member 1 is subjected to solder plating to improve the fusion with the lead alloy (weldability with the lead alloy). have.

In this way, the rotation preventing means is provided in the head portion 11 of the first terminal member and is not provided at the junction of the first terminal member 1 and the second terminal member 2, thereby providing the legs of the first terminal member. The shape of the part 12 can be formed smoothly. Therefore, hot water circulation failure can be prevented at the time of forming the second terminal member 2. As mentioned above, the terminal part 8 provided with the anti-rotation function and without a bad contact can be formed, and the quality of a storage battery can be kept constant, without damaging electroconductivity.

Moreover, since the leg part 12 of the 1st terminal member which is a junction part with the 2nd terminal member 1 can be formed symmetrically with respect to the central axis of the terminal member 1, the deviation of electric conduction becomes difficult to occur, and electroconductivity The efficiency can be improved.

The leg portion 12 of the first terminal member is lathed in a shape as shown in Fig. 1, that is, a shape having a stepped portion having a different diameter (thickness of the lower end of the leg portion 12: the fall prevention portion 14). Thereby, it can also function as a fall prevention means for preventing the 1st terminal member 1 from coming off from the 2nd terminal member 2. As shown in FIG.

The 1st terminal member 1 as mentioned above turns the leg part 12 of a 1st terminal member by lathe, leaving a part from angular bar steel, such as a hexagonal bar, as the head part 11 of a 1st terminal member. Even if it forms, the leg part 12 of the 1st terminal member 1 is formed from a round bar steel by lathe processing, and the head part 11 of the 1st terminal member which becomes a rotation prevention means is formed by planar processing. do. When manufacturing the 1st terminal member 1 from a hexagonal bar steel, since it can manufacture by one work process, work efficiency can be improved and manufacturing cost can be reduced.

The screw part provided in the vertex surface of a 1st terminal member may be the female screw opened to the vertex surface as shown to Fig.1 (a), and as shown to Fig.1 (b) as above, the screw part 13 ' ) May be a male screw provided above the drawing from the vertex surface.

FIG. 2B is a sectional view of the vicinity of a terminal portion of a lead storage battery using the first terminal member 1 ′ shown in FIG. 1B. As shown in FIG.2 (b), even when the 1st terminal member 1 'is used, a terminal part can be made substantially the same structure as FIG.2 (a). Moreover, also in the case of the terminal of the lead acid battery which used the 1st terminal member 1 'shown to Fig.1 (b), the head part 11' of the 1st terminal member is the same as the terminal shown to Fig.1 (a). ), The anti-rotation function is provided. In addition, the fall prevention part 14 'is provided in the lower end part of the leg part 12' like FIG.2 (a).

5 is a cross-sectional view of a terminal vicinity of a storage battery according to an embodiment of the present invention. In the example described in FIG. 5A, the terminal is directed toward the head 11 (upward in the drawing) at the stepped portion of the boundary between the head 11 and the leg 12 of the first terminal member 1. The taper 15 which has the inclination which thickens the member 1 is formed. In the example described in FIG. 5B, the cross-sectional shape of the stepped portion that is the boundary between the head portion 11 and the leg portion 12 of the first terminal member 1 is viewed from the first terminal member 1. It is made into the substantially circular arc shape 16 which is convex.

As mentioned above, the terminal part 8 is shape | molded by setting the terminal member 1 to a mold, and putting molten metal which consists of lead or a lead alloy (insert molding). Although the said molten metal is put in from the lower side of the figure, when the step of the boundary between the head part 11 and the leg part 12 of the terminal member 1 is an angular shape like embodiment shown in FIG. 1, when a molten metal is put in, There is a fear that the air in the corner portion that is concave at right angles of the member 1 does not come out and the gas is accumulated. If the gas is solid, there is a fear that the deterioration of the bonding between the terminal member 1 and the terminal member 2 will lead to a decrease in the conductivity efficiency. According to the embodiment described in FIG. 5 (a) and FIG. 5 (b), the gas is likely to be removed, which is a preferred embodiment. Further, in order to smooth the flow of the molten metal, as shown in FIGS. 5A and 5B, the taper 15 ′ is also formed at the stepped portion or the lower portion of the upper end of the release preventing portion 14. It is also effective to make the cross section substantially arc-shaped 16 '.

In the present invention, the inclination of the taper and the size of the arc radius are not particularly limited, but in order for the molten metal to flow smoothly, it is preferable that the side surfaces of the tapered or approximately arc-shaped portions are erected in the longitudinal direction of the drawing. Do. In addition, to make the stepped portion of the first terminal member 1 described in FIGS. 5A and 5B into a tapered or substantially arc-shaped shape, a male screw is applied to the apex shown in FIG. The same applies to the terminal member having.

In the process of insert-molding the said terminal part 8, instead of the method of performing solder plating on the surface of the terminal member 1 as mentioned above, when setting the terminal member 1 to a mold, Applying flux, for example, to the joining surface (the surface of the leg part 12) with the terminal member 2 prevents metal oxidation of the joining surface, and makes the terminal member 1 and the terminal member 2 satisfactorily. It is a valid method because of the splicing.

According to the storage battery according to claim 1 of the present invention, the anti-rotation means is attached to the second terminal member while the anti-rotation means is secured by providing the anti-rotation means to the head portion of the first terminal member rather than the junction portion with the second terminal member. It does not need to be provided in the leg part of the 1st terminal member which is a junction part with. As a result, when the leg portion of the first terminal member is embedded in the second terminal member, the flow of the molten metal melted by the anti-rotation means is not obstructed, and the molten metal flows smoothly, and the terminal portion is caused by poor melt injection. It is possible to prevent the deterioration of the conduction efficiency at the same time and to keep the quality of the battery constant.

According to the storage battery according to claim 2 of the present invention, it is possible to prevent the first terminal member from being pulled out by the release preventing means provided in the leg portion of the first terminal member.

According to the storage battery according to claim 3 of the present invention, since the rotation prevention function can be provided without limiting the shape of the head portion of the terminal member 1, the degree of freedom in designing the terminal portion is increased.

According to the storage battery according to claim 4 of the present invention, the production of the storage battery is easy, and when external torque is applied to the first terminal member, an external force is prevented from being applied to the joint portion of the first terminal member and the second terminal member. Can be reduced or alleviated.

According to the storage battery according to claim 5 of the present invention, gas can be prevented from adhering to the joining surfaces of the terminal member 1 and the terminal member 2, and both terminal members can be joined together satisfactorily to increase the conductivity efficiency.

Claims (11)

An accumulator having a terminal portion in which a vertex surface is exposed to the outside from a rolling cover, The said terminal part is equipped with the metal 1st terminal member which has a screw part in a vertex surface, and the metal 2nd terminal member which embeds the leg part of this 1st terminal member, The said 1st terminal member is equipped with the rotation prevention means in the head part which is not embedded in the said 2nd terminal member, The storage battery characterized by the above-mentioned. The storage battery according to claim 1, wherein the first terminal member includes a fall prevention means in the leg portion. The storage battery according to claim 1, wherein the rotation preventing means has an outer shape which is asymmetrical with respect to the central axis of the screw portion of the first terminal member. 3. The storage battery according to claim 2, wherein the first terminal member includes a fall prevention means in the leg portion. The storage battery according to claim 1, wherein the rotation preventing means is fixed by a resin filled in a gap between the roll cover and the first terminal member. 6. The storage battery according to claim 5, wherein the first terminal member includes a fall prevention means in the leg portion. The said 1st terminal member is equipped with the fall prevention means in a leg part, The said rotation prevention means has an external shape which is asymmetric with respect to the central axis of the screw part of the said 1st terminal member. Storage battery. The storage battery according to claim 1, wherein the cross-sectional shape of the stepped portion, which is a boundary between the head portion and the leg portion of the first terminal member, is tapered or substantially arc-shaped. 9. The storage battery according to claim 8, wherein the first terminal member includes a fall prevention means in the leg portion. The said 1st terminal member is equipped with the fall prevention means in a leg part, The said rotation prevention means has an external shape which is asymmetric with respect to the central axis of the screw part of the said 1st terminal member. Storage battery. The said first terminal member is provided with the fall prevention means in a leg part, The said rotation prevention means has an external shape which is asymmetric with respect to the central axis of the screw part of the said 1st terminal member, The battery is fixed by a resin filled in the gap between the roll cover and the first terminal member.