JP3042131B2 - Lead storage battery - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a lead-acid battery, and more particularly, to a sealed lead-acid battery, one of a pair of terminals in a terminal box provided at one end of a battery case, and an electrode plate group in a cell room furthest from the terminal box. In connection with one of the positive and negative terminals.

[0002]

2. Description of the Related Art Conventionally, the arrangement of cell chambers in a lead-acid battery having a plurality of cell chambers for accommodating an electrode plate group is roughly classified into two types: cell chambers arranged in the same direction or U-shaped. Is done. However, the external shape of the battery is often limited to an elongated shape. In such a case, a method in which cell chambers are arranged in a line in the same direction and cells are connected in series is mainly used.

[0003] Further, there is an increasing demand for small-sized sealed lead-acid batteries in which cell chambers are arranged in a line, which are compact, lightweight, easy to handle, and can be loaded into equipment to be used with one touch. In response to this demand, a system has been adopted in which a pair of input / output terminals of a battery are housed in a terminal box provided at one end of an elongated battery case.

In this method, one of a positive terminal and a negative terminal of a pair of terminals in a terminal box is connected to one of a positive terminal and a negative terminal provided on an electrode plate group in a cell chamber farthest from the terminal box. Is connected to the opening of the battery case by using a lead arranged so as to cross the opening.

FIG. 4 is a schematic view of a cross section of an upper portion of a conventional lead-acid battery using this method. In FIG. 4, the lead 1 mainly used is a thin stranded wire coated with a resin.
Are mounted on partition walls 3 that partition between cell chambers of the battery case 2 so as to cross them. Then, the upper portion of the opening of the battery case 2 and the inner lid 4 are adhered to each other by an adhesive filled in the lid or the inner lid 4, and the battery is sealed.

[0006]

However, in a lead-acid battery having a terminal box in which a plurality of cell chambers are arranged in a row and a pair of input / output terminals are accommodated at one end, FIG.
When one terminal in the terminal box is connected to either the positive terminal or the negative terminal of the cell chamber farthest from this terminal box by a lead, the lead portion facing the cell chamber is securely fixed. In addition, since the battery is not protected, it is often exposed to or adheres to the diluted sulfuric acid electrolyte or its spray when the battery is used.The adhesion of the diluted sulfuric acid causes the lead coating or the core wire to corrode and break. Had the problem that

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned problem. In a lead-acid battery provided with a terminal box in which a plurality of cell chambers are arranged in the same direction and one end of which has a terminal box for accommodating a pair of input / output terminals. One terminal in the box is connected to one terminal of the electrode group in the cell chamber farthest from this terminal box, and the lead is not corroded by the dilute sulfuric acid electrolyte when using the battery, and is not disconnected. It is an object of the present invention to provide a lead storage battery in which a lead lead-out portion is protected.

[0008]

In order to solve such a problem, a lead storage battery of the present invention includes a battery case having the above-described structure, and stores a group of electrode plates in each cell chamber of the battery case. Connect one input / output terminal in the terminal box provided at the end of the battery case to one terminal of the electrode group in the cell chamber farthest from the terminal box with a lead, and attach the lid to the battery case opening with adhesive. In the lead-acid battery which is fixed and hermetically sealed, the lead is embedded in an adhesive filled on the back side of the lid.

Here, one terminal in the terminal box is connected to:
The lead connected to one terminal of the electrode group in the cell chamber furthest from the terminal box is preferably fixed by a recess provided on a partition partitioning each cell chamber of the battery case. Further, it is preferable that the lead fixing recess is formed as a cut or a slit formed at the tip of a small protruding piece provided so as to slightly protrude upward therefrom integrally with the partition.

[0010]

With such a structure, the lead connecting one terminal in the terminal box and one terminal of the electrode group in the cell chamber farthest from the terminal box can be formed as follows.
A single straight line that is fixed to the upper part of the partition wall and taut can be maintained. Therefore, the lead can be completely embedded in the adhesive filled on the back side of the lid, and the lead can be completely surrounded and protected by the adhesive. No lead is corroded or broken.

The leads can be securely fixed in a straight line without being displaced by fitting them into recesses provided above partition walls that partition the inside of the battery case into cell chambers. Therefore, the lead can be completely embedded in the adhesive filled on the back side of the lid at the same time when the battery case and the lid are fixed with the adhesive.

[0012]

Embodiments of the present invention will be described below with reference to the drawings.

FIG. 1 is a perspective view of a sealed lead-acid battery of the present invention, in which a battery case and a part of a lid are cut away. As shown in FIG.
In the sealed lead-acid battery of the present invention, the battery case 2 includes a plurality of cell chambers 5 arranged in a row, and a terminal box 7 at one end of which accommodates a pair of input / output terminals 6 for connecting to equipment. The electrode groups 8 are housed in the respective cell chambers 5, and these electrode groups 8 are electrically connected in series by inter-cell connecting pieces.

Here, the pair of input / output terminals 6 in the terminal box 7 is held by a terminal holder and a part thereof is exposed outside the battery case. In another part of the holder, a thermal protector 9 that switches from on to off when the temperature of the battery case 2 is detected to be higher than a predetermined value by detecting a temperature rise in the battery case 2 and protects the battery.
The lead wire 10 of one terminal of the thermal protector 9 is connected to one pole 11 of a group of electrode plates housed in a cell chamber adjacent to the terminal box 7 . The lead wire of the other terminal of the thermal protector 9 is connected to one terminal of the input / output terminal 6. Therefore, this thermal protector 9 has one input / output terminal,
It also serves as a lead for connecting to either the positive or negative electrode group in the nearest cell chamber.

One end of the lead wire 1 is connected to the pole 12 which is one terminal of the electrode plate group housed in the cell chamber 5a farthest from the terminal box 7. In order to facilitate the linear arrangement, the electrode group 8 in each cell chamber 5 is installed on the upper side of the battery case 2 on the side opposite to the inter-cell connection side. The lead wire 1 is a concave portion 13 provided above the partition wall 3 between the cell chambers 5 of the battery case 2 as shown in FIG. 2, specifically, a part of the partition wall 3 shown in FIG. A small protruding piece 13a protruding upward is provided, and is fitted into a semicircular recess 13b provided at the tip thereof, and is securely fixed in a straight line by the clip force of the small protruding piece.

After the connection between the lead 1 and the thermal protector 9 has been completed and the electrical connection has been completed, the adhesive 1
4, the battery case 2 and the inner lid 4 were bonded, and the battery was sealed. At this time, in addition to an adhesive groove for fixing to the battery case, a shallow groove for inserting a lead wire is formed in a portion corresponding to the lead wire 1 fixed so as to cross the cell chamber. 1
By filling the groove 15 with the adhesive 14, the lead wire 1 is completely embedded in the adhesive 14 at the same time when the battery case 2 and the inner lid 4 are fixed as shown in FIG. I was able to.

Thus, in the sealed lead-acid battery according to the present invention, the lead wire connecting one terminal in the terminal box and one electrode group terminal in the cell chamber farthest from the terminal box is completely centered. Since it could be fixed in the adhesive on the back side of the lid and protected, the corrosion and disconnection of the lead wire during use of the battery could be completely prevented.

[0018]

As described above, according to the lead-acid battery of the present invention, in a lead-acid battery having a plurality of cell chambers arranged in a line and having a terminal box at one end, one terminal in the terminal box and this terminal box The lead connecting the terminal of one electrode group in the cell chamber farthest from the battery is completely embedded and protected in the adhesive filled on the back side of the inner lid. It is possible to reliably prevent the lead from being corroded or broken by the electrolytic solution without being exposed to or adhered to the spray, thereby improving the reliability of the battery.

[Brief description of the drawings]

FIG. 1 is a partially cutaway perspective view of a sealed lead-acid battery of the present invention.

FIG. 2 is a perspective view of a battery case of the sealed lead-acid battery of the present invention.

FIG. 3 is a schematic cross-sectional view of the upper part of the sealed lead-acid battery of the present invention.

FIG. 4 is a schematic cross-sectional view of the upper portion of a conventional sealed lead-acid battery.

[Explanation of symbols]

1 Lead for connecting one terminal of a terminal box to one terminal of a cell room furthest from the terminal box 2 Battery case 3 Partition wall 4 Inner lid 5 Cell room 5a Cell room farthest from the terminal box 6 Input / output terminal 7 terminal Box 8 Electrode group 9 Thermal protector 10 Lead wire of one terminal of thermal protector 11 Electrode pole of electrode group in cell room adjacent to terminal box 12 Electrode column of electrode group in cell room farthest from terminal box 13 A recess 13a provided on a partition partitioning the cell chamber 13a Small protruding piece 13b A recess 14 Adhesive 15 Groove of inner lid

──────────────────────────────────────────────────の Continued on the front page (58) Field surveyed (Int.Cl. ⁷ , DB name) H01M 2/02 H01M 2/04 H01M 2/22 H01M 2/30 H01M 10/00-10/34

Claims (3)

(57) [Claims] 1. A battery case having a plurality of cell chambers formed in a row and having a terminal box at one end for housing input / output terminals; an electrode plate group housed in each cell chamber of the battery case; One terminal in the terminal box and one terminal of the cell chamber furthest from the terminal box are connected, and a lead and a lid that covers the battery case are arranged on the upper part of the partition that divides the battery case into each cell room. Wherein the lid is a lead storage battery bonded to the battery case with an adhesive filled on the back side of the lid, wherein the lead is buried in the adhesive filled on the back side of the lid. 2. The lead-acid battery according to claim 1, wherein said lead is fitted and fixed in a recess provided on a partition partitioning a cell chamber of the battery case. 3. The lead-acid battery according to claim 2, wherein the lead fixing recess has a notch or a slit formed at a tip thereof by a small protruding piece slightly protruding upwardly integrally with the partition wall.