JP7212434B2 - assembled battery - Google Patents

Description

The present invention relates to an assembled battery that is used by combining a plurality of cylindrical batteries.

As an assembled battery, for example, Patent Document 1 discloses an assembled battery in which a plurality of cylindrical batteries are arranged in contact with each other, spacer sheets are arranged on the upper and lower surfaces of the formed battery, and the whole is wrapped with a heat-shrinkable tube. is described. In Patent Document 2, a plurality of cylindrical batteries are arranged in a row by contacting and adhering their side surfaces, and a plate-shaped spacer called a plate-shaped contact plate is formed on the upper and lower surfaces of the formed battery and has a hanging wall on the outer peripheral edge of the flat plate. A covered battery pack is shown. Patent Literature 3 describes an assembled battery having an insulating member inserted between adjacent cylindrical batteries.

JP 2013-37866 A Japanese Utility Model Laid-Open No. 51-49428 JP 2015-176741 A

These assembled batteries are used as backup power sources for emergency lights and the like. After the assembled battery is manufactured, there are cases in which the assembled battery is accidentally dropped, and the assembled shape of the assembled battery may be distorted or the battery may be damaged due to the drop.

SUMMARY OF THE INVENTION The present invention has been made in view of the above-mentioned circumstances, and aims to prevent the shape of the assembled battery from being distorted and to prevent the battery from being damaged by alleviating the distortion and impact caused by dropping with a simple structure. The purpose is to provide an assembled battery capable of

The present invention meets these demands by arranging a large number of cylindrical batteries with their side surfaces in contact with each other, covering the formed upper and lower surfaces and the peripheral corners with a spacer, and furthermore, covering the upper surface of the spacer. The whole including a plurality of cylindrical batteries is wrapped with a heat-shrinkable tube. The spacer may be made by molding a synthetic resin, but the heat-shrinkable tube that wraps the outside must not be damaged, so molding is time-consuming and easy to bend. I used a board. This pressboard is a high density board laminated with paper. By attaching a heat-shrinkable tube after attaching the spacer made of the press board, the assembled battery can be prevented from moving and the insulation strength can be improved. In addition, the spacers and heat-shrinkable tubes can reinforce the upper and lower surfaces of the assembled battery and the corner ridgelines of the peripheral side, so that the distortion and impact caused by dropping etc. can be alleviated, and the distortion of the assembled battery shape can be eliminated. Strengthen the insulation and avoid the risk of short circuits. Furthermore, it is possible to prevent the battery from being damaged.

According to the present invention, it is possible to prevent the shape of the assembled battery from being distorted and to prevent the battery from being damaged by alleviating the distortion and impact caused by dropping with a simple structure.

BRIEF DESCRIPTION OF THE DRAWINGS It is a figure which shows the assembled battery which concerns on embodiment of this invention, (a) is a front view, (b) is a top view. It is a figure which shows the spacer used within an assembled battery, (a) is a front view, (b) is a top view, (c) is a right view, (d) is a left view. FIG. 10 is a front view of another spacer used within the assembled battery;

Hereinafter, an assembled battery of one embodiment of the present invention will be described with reference to the drawings.
FIG. 1 shows an assembled battery 10 according to an embodiment of the present invention, where (a) is a front view and (b) is a plan view. This assembled battery 10 is a combination of ten cylindrical batteries 1 whose side surfaces are covered with insulating tubes. They were arranged in two rows with their sides in direct contact with each other.

In this configuration, as the cylindrical battery 1, a nickel-cadmium storage battery formed in a cylindrical shape using a wound electrode group was used. In addition to the nickel-cadmium storage battery described above, a nickel-hydrogen storage battery is used as the alkaline storage battery for this cylindrical battery.

Moreover, it goes without saying that the side surfaces may be in direct contact with each other without using the insulating plate if it is not necessary.

A cylindrical battery group in which cylindrical batteries are arranged is fixed around its periphery with a fixing tape or the like, and then the cylindrical batteries 1 are connected in series using a connection plate such as a nickel plate. Lead wires 3 and 3 were connected to the positive and negative terminals of the type batteries 1 and 1, respectively.

The positive and negative terminals of the cylindrical batteries 1 are located above and below, respectively, and the cylindrical batteries 1 adjacent to each other in a row are arranged upside down so that they can be easily connected in series. The upper and lower surfaces of the arrayed cylindrical battery groups were each covered with a spacer 4 made of a sheet of electrical insulating paper.

Details of this spacer 4 are shown in FIG. In FIG. 2, (a) is a front view, (b) is a plan view, (c) is a right side view, and (d) is a left side view. The spacer 4 is formed into a lid-like body, such as a lunch box lid, by bending the entire circumference of a sheet of electrical insulating paper having a thickness of about 2 to 5 mm. Therefore, there is no need to create a molding die for the spacer according to the number of batteries and the arrangement of the batteries, and the cost can be reduced.

Further, as shown in the right side view of (c) and the left side view of (d), the lower portion of the bent hanging wall 41 of the spacer 4 was notched into a curved shape by cutting to form a concave portion 42 . This is for drawing out the lead wires 3, 3 from this concave cutout 42, and the lead wires are formed on both sides, such as those on the right side, those on the left side, or those on both sides. This is because it can be used in common with If it is desired to use a dedicated spacer 4 for each case, it is of course possible to form the recessed portion 42 only in one of them. Two spacers 4 were prepared to cover the upper and lower surfaces of the arranged cylindrical battery groups, respectively, and lead wires were drawn out laterally from recessed cutouts 42, and the peripheral corners of the cylindrical battery groups were also covered. .

In this case, when the upper surface protrudes upward as a connecting portion for the lead wires 3, 3, as shown in FIG. is preferred.

Further, in the above-described embodiment, the spacer 4 is formed by bending one sheet of electrical insulating paper, but it is not necessarily required to be formed by one sheet of electrical insulating paper. For example, one spacer 4 may be configured by using two or more sheets of electrical insulating paper and sticking them together. However, from the viewpoint of preventing an increase in the number of members, it is desirable to configure the spacer 4 with one sheet of electrical insulating paper.

Moreover, although the type of the electrical insulating paper used for the spacer 4 was not specifically described, various types can be used. For example, capacitor paper, coil insulation paper, pressboard, polyester film-coated paper, or fiber paper can be used. Among these, it is preferable to use a press board, which is a high-density board in which paper is laminated and which is easy to bend.

Moreover, the paper constituting the spacer 4 should have at least electrical insulation, and it is not always necessary to use insulating paper. For example, it is also possible to apply an insulating material to the inner surface facing the storage space of the cylindrical battery group made of paper formed in the lid-like body so as to provide electrical insulation. be.

Next, the cylindrical battery group, whose upper and lower surfaces are covered with spacers 4 formed on the lid-like body, is entirely covered with a heat-shrinkable tube 5 made of a synthetic resin such as polyethylene, polypropylene, or polyvinyl chloride. The assembled battery 10 was completed. As shown in FIG. 1, the heat-shrinkable tube 5 is open on the left and right sides of the cylindrical battery group.

In this way, a drop test was conducted in which the assembled battery constructed using pressboard as a spacer was dropped from a height of 75 cm onto a plate with a thickness of 10 cm. None of the pieces had a distorted shape, but only one piece had a hole in the heat-shrinkable tube covering its periphery.

On the other hand, for comparison, one out of 10 assembled batteries that were covered with a press board instead of using a heat-shrinkable tube was distorted, and the insulating tube surrounding the cylindrical battery cracked. There were 5 of them with .

As described above, the assembled battery of the present invention was not distorted due to being dropped, and cracks in the insulating tube of the cylindrical battery could be prevented. Therefore, if the assembled battery is accidentally dropped before shipment, but there is no abnormality in the cylindrical battery itself, it is sufficient to replace the heat-shrinkable tube that covers the cylindrical battery group with the product of the present invention. In the assembled battery of the example, the connecting plate had to be removed, the side surface of the cylindrical battery had to be newly covered with an insulating tube, and the assembled battery had to be reassembled.

1 Cylindrical Battery 2 Insulating Plate 3 Lead Wire 4 Spacer 41 Hanging Wall 42 Recess 43 Upper Surface 44 Step 5 Heat Shrinkable Tube 10 Assembled Battery

Claims (6)

The upper and lower surfaces and the corners of a large number of cylindrical batteries arranged in contact with each other are covered with spacers made of paper, and the whole is wrapped with a heat-shrinkable tube. assembled battery. 2. The assembled battery according to claim 1, wherein the spacer is a cover-like body formed by folding a single sheet of paper. 3. The assembled battery according to claim 1, wherein the spacer is formed by cutting a part of the outer edge of the sheet-shaped paper material into a curved shape as an outlet for the lead wire. . 4. The assembled battery according to any one of claims 1 to 3, wherein the spacer has a step on the lead wire lead-out side as a lead wire connecting portion on the upper surface of the lid-like body. The assembled battery according to any one of claims 1 to 4, wherein the spacer is made of electrical insulating paper. 6. The assembled battery according to claim 5, wherein the electrical insulating paper is composed of capacitor paper, coil insulating paper, pressboard, polyester film-coated paper, or fiber paper.

Images