JPH06124697A - Sealed type lead acid battery - Google Patents

Abstract

PURPOSE:To provide a sealed type lead acid battery having high reliability and small size, and manufactured at a low cost. CONSTITUTION:In a sealed type lead-acid battery constructed by using a cell which receives a group of plates consisting of a positive pole, a negative pole and a separator and has a terminal lead and a lid made of synthetic resin and having a terminal plate so as to receive the cell in a metal case, so that the terminal part for making contact with an device is exposed above the cell via the lid, a concave part 16 is provided on the upper corner of a cell 1, a terminal lead 2 is exposed from the concave part 16, and a pair of terminal plates 4 are formed in one body with a lid 6. One end of the terminal plate 4 is exposed on the upper surface of the lid 6, a lead plate 5 is formed so that it may project vertically downward from the lid 6, the lead plate 5 is positioned to face to the concave part 16 of the cell 1, and the lead plate 5 is soldered to a terminal lead 2. A groove 21 is provided on the lid 6 on out side of the lead plate 5 by transversing it in parallel to the lead plate 5, and the lid is folded downward from the groove 21 after soldering.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a sealed lead acid battery.

[0002]

2. Description of the Related Art Lead-acid batteries are widely used in various fields because of their high energy density and excellent economic efficiency. Of these, sealed lead-acid batteries are maintenance-free and have sufficient reliability, so demand for them as a power source for small electronic devices such as video tape recorders is rapidly increasing.

Conventionally, as shown in FIG. 5, a plurality of cells 1 are stacked, one pair of terminal leads 2 exposed on the upper surface are connected with a tin-plated connector 3 of brass, and AB
A lid 6 made of S resin and having a terminal plate 4 and a lead plate 5 drawn out from the terminal plate 4 attached thereto is placed on the upper surface of the cell 1, and the pair of lead plates 5 and the other pair of terminal leads 2a are shown in FIG. As shown in the drawing, the cell 1 is soldered by the soldering section 7, and the cell 1 is housed in the metal case 8 via the insulating plate 9 that prevents the metal case 8 and the soldering section 7 from coming into contact with each other.

[0004]

However, in such a conventional configuration, (1) since the soldering portion 7 projects above the upper surface of the cell 1, the thickness of the soldering portion 7 increases the height of the battery. . (2) The lid 6, the terminal lead 2a, the connector 3, the soldering portion 7 and the like are arranged on the upper surface of the cell 1 so that the workability is poor. In addition, there is a risk of damaging the lid 6 during soldering. (3) The insulating plate 9 is required. There were drawbacks such as. SUMMARY OF THE INVENTION It is an object of the present invention to eliminate such drawbacks and to provide a small size, highly reliable and low cost sealed lead acid battery.

[0005]

In order to achieve the above object, the sealed lead-acid battery of the present invention is provided with a recess at the upper corner of the cell, the terminal leads are exposed from the recess, and the pair of terminal plates are integrated with the lid. And one end of the terminal plate is exposed on the upper surface of the lid, and the other end vertically projects downward from the lid to form a lead plate, and the lead plate is located at a position corresponding to the concave portion of the cell,
The lead plate is soldered to the terminal leads of the cell. In addition, the lid has a structure in which a groove is formed outside the lead plate in parallel with the lead plate so as to traverse the lid, and after the lead plate and the terminal lead are soldered, the outside of the groove of the lid can be bent from the groove. is there.

[0006]

With this structure, (1) the soldering portion between the lead plate and the terminal lead can be provided in the concave portion at the upper corner of the cell. (2) Parts, soldering parts, etc., which were concentrated on the upper part of the cell, can be dispersed on the upper and side surfaces. (3) The lid can also serve as the insulating plate.

[0007]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A sealed lead acid battery according to an embodiment of the present invention will be described below with reference to the drawings. The same members as those in the conventional example will be described with the same reference numerals. In FIG. 1, a cell 1 includes a polyethylene frame 13 that houses a positive electrode plate 10 and a negative electrode plate 11 via a separator 12, and an opening 14 of the frame 13.
And a polyethylene film 15 for sealing
The frame 13 has a pot 18 formed by walls 13 a provided on both sides of an exhaust port 19 at the center of the upper portion and protruding upward.
And the recess 1 formed at the outer corner of the pot 18.
6, one end of the terminal lead 2 tinned to the copper wire is soldered to the ears 17 of the positive electrode plate 10 and the negative electrode plate 11 exposed in the pot 18 of the frame body 13, respectively. The other end is exposed in the recess 16 of the frame body 13. Frame 1
After inserting the electrode plate group consisting of the positive electrode plate 10, the negative electrode plate 11, and the separator 12 into 3, the film 15 is heat-welded to the frame body 13, and an adhesive (not shown) is put in the pot 18 to seal and the exhaust port. An electrolytic solution is injected from 19 and a safety valve 20 is attached to complete the cell 1.

As shown in FIG. 2A, the lid 6 is made of ABS resin integrally formed with a pair of terminal plates 4 in which a pair of brass is nickel-plated, and the top surface of the terminal plate 4 for contacting the equipment. As shown in FIG. 2B, the lower end of the terminal plate 4 has an exposed portion at one end and is connected to the terminal lead 2 of the cell 1. The other end of the terminal plate 4 projects to a position corresponding to the recess 16 of the cell 1. The lead plate 5 is formed. The lid 6 is provided outside the lead plate 5 in parallel with the lead plate 5.
It has a structure in which a groove 21 that traverses is provided.

As for the method of assembling the battery, as shown in FIG. 3, after assembling two cells 1, one terminal lead 2 (not shown) exposed in the recess 16 of the cell 1 was tin-plated on brass. After connecting with the connector 3, the lid 6 is covered from above and the lead plate 5 and the other terminal lead 2 of the cell 1 are soldered. Then, as shown in FIG. 4, the outer side 2 of the groove 21 of the lid 6
The battery 2 is bent in the direction of the soldering portion 7 and housed in the metal case 8 to form a battery. In this embodiment, only the terminal plate 4 is formed integrally with the lid 6, but the connector 3 may also be formed integrally, and the groove 21 provided in the lid 6 is for facilitating bending. The exposed position of the lead plate 5 may be provided in a point-symmetrical, line-symmetrical or asymmetrical position around the center of the lid 6 depending on the number of combinations of the cells 1.

[0010]

As is apparent from the above description, according to the sealed lead-acid battery of the present invention, (1) the terminal lead and the lead plate and the soldering portion of the terminal lead and the connector are provided at the corners of the upper part of the cell. The size of the battery can be reduced by providing it in the recess. (2) The workability is improved by dispersing the soldering portions of the terminal lead and the lead plate and the terminal lead and the connector from the cell top surface to the cell side surface. (3) The cost can be reduced by sharing the insulating plate and the lid.

[Brief description of drawings]

FIG. 1 is an exploded perspective view of a cell of a sealed lead acid battery according to an embodiment of the present invention.

2A is a top perspective view of the lid, and FIG. 2B is a bottom perspective view of the lid.

FIG. 3 is an exploded perspective view of the cell and the lid.

FIG. 4 is an exploded perspective view of the cell and a metal case.

FIG. 5 is an exploded perspective view of a conventional sealed lead-acid battery

FIG. 6 is an exploded perspective view of the cell and a metal case.

[Explanation of symbols]

 1 Cell 2 Terminal Lead 4 Terminal Plate 5 Lead Plate 6 Lid 8 Metal Case 10 Positive Plate 11 Negative Plate 12 Separator 13 Frame 13a Wall 16 Recess 17 Ear 18 Pot 19 Exhaust Port 21 Groove

Claims (2)

[Claims] 1. A synthetic resin lid is mounted on top of a plurality of cells in which a positive electrode plate and a negative electrode plate facing each other with a separator interposed therebetween are housed in a synthetic resin frame, and the cells are housed in a metal case. In the sealed lead-acid battery, the frame includes a pot formed by walls provided on both sides of an exhaust port at the center of the upper portion so as to project upward, and a recess formed in a corner on the outside of the pot, Insert one end of the terminal lead connected to each ear of the positive electrode plate and the negative electrode plate into the pot of the frame body, and insert the other end of the terminal lead into the recess of the frame body,
A sealed lead-acid battery in which a pair of terminal plates exposed on the upper surface of the lid are connected to terminal leads inserted in the pot, and a pair of lead plates protruding below the lid are connected to terminal leads inserted in the recesses. 2. The lid is provided with a groove on the outer side of the lead plate, the groove traversing the lid parallel to the lead plate, and after connecting the lead plate to the terminal lead, the outer side of the groove of the lid is bent from the groove. Item 1. A sealed lead acid battery according to Item 1.