JPH0644022U - Cylindrical assembled battery - Google Patents

Abstract

(57) [Summary] [Purpose] To prevent the bending of a cylindrical assembled battery. [Structure] A spacer 10 made of an insulator is interposed at a connecting portion of each unit cell 1. The spacer 10 has a substantially disc shape, and a notch 10a for receiving the protruding terminal portion 1a and the connection plate 2 for electrically connecting the unit cells 1 to each other is formed in a rectangular shape by connecting the central portion and the peripheral portion. At the same time, it is formed with the same thickness as the gap corresponding to the height of the terminal portion 1a formed between the unit cells 1. With the notch 10a positioned so that the terminal portion 1a and the bent connection plate 2 are housed, the spacer 10 is inserted between the unit cells 1 to form the outer tube 4
By enclosing the outer periphery of each unit cell 1 with the above and compressing the outer tube 4 by heat contraction, one cylindrical assembled battery is completed.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to improvement of a cylindrical assembled battery used as a power source for driving a communication device, for example.

[0002]

[Prior art]

 A cylindrical assembled battery is used as a driving power source for a communication device.

In this assembled battery, as shown in FIG. 6, a terminal plate 1 a protruding from the tip of each cylindrical unit cell 1 and a terminal surface 1 b on the rear end side of the front side unit cell 1 are connected by a connecting plate 2. While connecting, the terminal portion 1a is butted against the terminal surface 1b with the peripheral edge of the terminal portion 1a covered with the insulating plate 3, and the plurality of unit cells 1 are arranged in a straight line. ), Etc., and tightened by heat shrinkage to expose the terminal portion 1a of the foremost unit cell 1 and the terminal surface 1b of the last unit cell 1 into a single assembled battery. Is forming.

[0004]

[Problems to be solved by the device]

 However, in the assembled battery of this form, even when each unit cell 1 is surrounded and tightly bound by the outer tube 4, there is a drawback that bending occurs as shown by an imaginary line in the figure. The reason for this is that when the terminal portion 1a and the terminal surface 1b of each unit cell 1 are in point contact with each other at the center of the terminal unit 1a, a gap corresponding to the protruding portion of the terminal unit 1a is generated between the unit cells 1. Therefore, if the shrinkage of the outer tube 4 has a directional property during the heat shrinkage, it is likely that the outer tube 4 is easily bent with the gap portion, which is a connection portion between the individual batteries 1, as a node.

If this bending occurs at the time of manufacturing, it can be rejected as a defective product, but it is a major cause of yield reduction. Also, if bending occurs due to aging after manufacturing or due to external force, this type of battery should be taken out of the waterproof container of the equipment used under normal conditions to avoid consumption, or the polarity should be reversed. Since it is stored inside, there is a concern that it may not be able to be loaded or may not be able to be pulled out when trying to load it into the container in an emergency.

In order to solve this problem, each unit cell is put into a rigid vinyl chloride pipe, a through plate and a core rod for preventing bending are arranged, and the whole assembled battery is rigidly molded by means such as resin molding. Although it may be possible to use a structure, in both cases, there is a problem in that the outer diameter dimension becomes larger than the current one, so the outer diameter of each unit cell must be reduced accordingly, which causes a problem in the capacity standard. In addition, in particular, the resin mold structure cannot be implemented due to the melting temperature.

The present invention solves the above problems, and an object thereof is to provide a cylindrical assembled battery in which bending can be prevented by adding a simple structure without causing a problem of outer diameter dimension. To do.

[0008]

[Means for Solving the Problems]

 In order to achieve the above-mentioned object, the present invention is to connect a plurality of tubular unit cells in series via a connecting plate connecting one end side projecting terminal portion and the other end side terminal surface of each unit cell, and A cylindrical assembled battery in which the terminal part is aligned with the other end side terminal surface and arranged in a straight line, and the outer periphery of the terminal part is surrounded by an insulating outer tube to form a single unit.A cutout for receiving the protruding terminal part and the connection plate. Is formed and has a thickness equivalent to the gap corresponding to the height of the protruding terminal portion formed between the unit cells, and is formed to have a diameter corresponding to the outer diameter of each unit cell. A spacer made of an insulator is interposed between the unit cells.

[0009]

[Action]

 According to the above configuration, the spacer eliminates the gap between the connecting portions of the unit cells and increases the seating area.Therefore, the outer tube does not bend due to heat contraction, change over time, or bending due to external force. . Further, since the outer diameter dimension is the same as the conventional one, there is no problem in terms of the capacity standard and the outer diameter standard.

[0010]

【Example】

 Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. 1 and 2 show a first embodiment of this idea. In the figure, the same parts as those in the prior art are designated by the same reference numerals, and only different parts or newly added parts are described by using different reference numerals.

Referring to FIG. 1, a cylindrical assembled battery according to the present invention has a terminal portion 1 a projecting from the tip of each cylindrical cell 1 and a rear end side of the front side cell 1 as in the conventional case. The terminal surface 1b is electrically connected to the terminal surface 1b by the connecting plate 2, and the terminal portion 1a is butted against the terminal surface 1b with the peripheral edge of the terminal portion 1a covered with the insulating plate 3 to arrange the plurality of unit cells 1 in a straight line. , The outer periphery is surrounded by an outer tube 4 made of an insulating material such as vinyl chloride, and the outer tube 4 is tightened by heat shrinkage, and the terminal portion 1a of the frontmost unit cell 1 and the terminal of the last unit cell 1 One surface of the cylindrical assembled battery is formed with the surface 1b exposed.

In this structure, a spacer 10 is interposed at the connecting portion between the unit cells 1. As shown in FIG. 1, the spacer 10 is a disk-shaped one made of an insulating material, and the notch 10a for receiving the projecting portion of the terminal portion 1a and the connecting plate 2 is formed in a rectangular shape by connecting the center and the peripheral portion thereof. It is formed with the same thickness as the gap formed between the unit cells 1 and corresponding to the height of the terminal portions 1a.

Then, the unit cells 1 are connected in series by the connecting plate 2, and then the unit cells 1 are arranged in a straight line, and the notch 10a side of the spacer 10 is connected to the terminal portion 1a and the connecting plate in a bent state. When the spacer 10 is inserted between the unit cells 1 in the state of being positioned at 2, then the outer circumference of each unit cell 1 is surrounded by the outer tube 4, and the outer tube 4 is tightened by heat shrinkage, as shown in FIG. Then, one cylindrical assembled battery is completed.

At this time, even if a force that bends the entire assembled battery in one direction is applied due to the direction of thermal contraction of the outer tube 4, the spacer 10 resists bending and holds the assembled battery in a linear shape. . Although the outer tube 4 is illustrated as a single layer in the drawing, a plurality of outer tubes 4 may be stacked and used within the allowable range of the outer diameter dimension in order to maintain the bending strength.

FIGS. 3 (a), 3 (b) and 4 show a second embodiment of the present invention, in which the spacer 12 has a spacer portion 14 having a notch 14a similar to that of the first embodiment. , And a relatively thin insulating portion 16 integrally provided on the bottom surface of the spacer portion 14. The insulating portion 16 corresponds to the insulating plate 3 of the first embodiment, and has a hole 16a formed at the center thereof for fitting with the terminal portion 1a.

The spacer 12 is fitted in advance to the terminal portion 1 a of each unit cell 1, and the outer circumference thereof is surrounded and tightly bound by the heat-shrinkable tube 18 to be fixed to the front terminal portion 1 a side of the unit cell 1. Then, similarly to the first embodiment, after connecting the unit cells 1 by the connecting plate 2, the connecting plate 2 is housed in the notch 14a of the spacer 12 in a bent state and arranged in a straight line, and the outer periphery thereof is arranged. A single cylindrical assembled battery is completed by surrounding and tightly binding the outer tube 4 with the outer tube 4. Since the unit cells 1 and the spacers 12 are fixed in advance by using the heat-shrinkable tube 18, workability when assembling the unit cells 1 with each other is improved, but the heat-shrinkable tube 18 is not always required. Not mandatory.

In this embodiment, the same effect as that of the first embodiment is produced, and the number of parts to be assembled can be reduced by integrally forming the spacer portion 12 and the insulating portion 16.

FIGS. 5 (a) and 5 (b) show a modified example of the spacer. The spacer 20 in FIG. 5 (a) has an annular shape in which a notch 20a is partially formed. And is formed into a substantially C shape. The spacer 22 shown in FIG. 5 (b) is formed by integrally forming an insulating portion 26 on the bottom of a spacer portion 24 formed in the same manner as in FIG. 5 (a). 24a is a notch and 26a is a fitting. It is a pagoda.

In the above modification, since the spacers 20 or 22 are provided only on the outer periphery of the gap between the unit cells 1, the battery pack is lightweight and the notch area is large, so that the connecting plate is large. The storage and positioning of item 2 is easy and the workability of assembly is good.

[0020]

[Effect of device]

 As described in detail with reference to the embodiments above, in the cylindrical assembled battery according to the present invention, bending does not occur in a state in which the outer circumferences of a plurality of unit cells linearly arranged by the outer tube are enclosed and bound. Therefore, it is possible to prevent the yield from decreasing due to deviation from the shape and dimension standard, and to prevent bending due to changes over time after manufacturing, and to prevent bending due to external force, thus eliminating loading problems during use.

Further, according to the present invention, since an insulating spacer is simply provided between the unit cells, there is an advantage that the operation can be performed easily and inexpensively, and the outer diameter dimension is the same as the conventional one. It can be used in the same manner as a conventional assembled battery without changing the capacity standard or the outer diameter standard.

[Brief description of drawings]

FIG. 1 is a perspective view showing a relationship between a spacer and a unit cell according to a first embodiment of the present invention.

FIG. 2 is a cross-sectional view showing a completed state of a cylindrical assembled battery in which the spacer is arranged.

3A and 3B are perspective views showing a relationship between a spacer and a unit cell according to a second embodiment of the present invention.

FIG. 4 is a cross-sectional view showing a completed state of a tubular assembled battery in which the spacers are arranged.

5A and 5B are perspective views showing a modified example of a spacer.

FIG. 6 is a cross-sectional view showing the structure of a conventional cylindrical assembled battery.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Unit battery 1a Terminal part 1b Terminal plate 2 Connection plate 3 Insulation plate 4 Exterior tube 10,12,20,22 Spacer 10a, 14a, 20a, 24a Notch

Claims (1)

[Scope of utility model registration request] 1. A plurality of tubular unit cells are connected in series via a connecting plate connecting one end side protruding terminal portion and the other end side terminal surface of each unit cell, and the protruding terminal portion is connected to the other end side. In a cylindrical assembled battery, which is arranged in a straight line by abutting against the terminal surface, and the outer periphery of which is surrounded by an insulating outer tube to form a single unit,
A notch is formed to receive the protruding terminal portion and the connection plate, and has a thickness equivalent to a gap corresponding to the height of the protruding terminal portion formed between the unit cells, A cylindrical assembled battery, wherein a spacer made of an insulator and having a diameter corresponding to the outer diameter is interposed between the unit cells.