JP2021012764A - Battery pack - Google Patents

Abstract

To prevent the shape of a battery pack from being distorted or a battery from being damaged when the battery pack formed by arranging a large number of cylindrical batteries is accidentally dropped.SOLUTION: An upper surface and a lower surface formed by contacting the side surfaces of a cylindrical battery with each other and arranged side by side, and the corners around the upper and lower surfaces thereof are each covered with one spacer, and it is possible to prevent distortion of the shape of a battery pack and damage to the battery at the time of dropping by wrapping the entire upper surface of the spacer with a heat-shrinkable tube including a plurality of cylindrical batteries to form the battery pack.SELECTED DRAWING: Figure 1

Description

The present invention relates to an assembled battery used in combination with a plurality of cylindrical batteries.

As an assembled battery, for example, in Patent Document 1, a plurality of cylindrical batteries are arranged in contact with each other on their side surfaces, spacer sheets are arranged on the formed upper and lower surfaces, and the entire assembled battery is wrapped in a heat-shrinkable tube. Is described. In Patent Document 2, a plurality of cylindrical batteries are arranged by abutting and adhering their side surfaces to each other, and a spacer called a dish-shaped plate having a hanging wall formed on the outer peripheral edge of a flat plate on the formed upper and lower surfaces is used. The covered battery is listed. Patent Document 3 describes an assembled battery including an insulating member inserted between adjacent cylindrical batteries.

Japanese Unexamined Patent Publication No. 2013-378666 Jitsukaisho No. 51-49428 JP 2015-176741

These assembled batteries are used as a standby power source for emergency lights and the like. After the assembled battery is manufactured, a fall accident may occur by mistake, and the fall may distort the assembled shape of the assembled battery or damage the battery, and improvement is desired.

The present invention has been made in view of the above circumstances, and has a simple configuration to prevent distortion and impact due to dropping to prevent distortion of the assembled battery shape and prevent the battery from being damaged. The purpose is to provide an assembled battery that can be used.

In order to meet these demands, 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 upper and lower surfaces formed and the corners around them with a single spacer, and further covering the upper surface of the spacer. The whole is packaged in a heat-shrinkable tube including a plurality of cylindrical batteries. The spacer may be manufactured by molding a synthetic resin, but since the heat-shrinkable tube that wraps the outside should not be damaged, the molding is easy to take time and is a kind of electrically insulating paper that is easy to bend. A board was used. This press board is a high-density board in which paper is laminated. By hanging the heat-shrinkable tube after attaching the spacer made of this press board, the assembled battery does not move and the dielectric 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 ridges on the peripheral side surfaces, so distortion and impact due to dropping can be alleviated, and distortion of the assembled battery shape can be eliminated. Insulation enhancement and risk of short circuit can be avoided. Furthermore, it is possible to prevent the battery from being damaged.

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

It is a figure which shows the assembled battery which concerns on embodiment of this invention, (a) is a front view, (b) is a plan view. It is a figure which shows the spacer used in the assembled battery, (a) is a front view, (b) is a plan view, (c) is a right side view, (d) is a left side view. It is a front view of other spacers used in an assembled battery.

Hereinafter, the assembled battery of one embodiment of the present invention will be described with reference to the drawings.
1A and 1B are views showing an assembled battery 10 according to an embodiment of the present invention, in which FIG. 1A is a front view and FIG. 1B is a plan view. This assembled battery 10 is a combination of 10 cylindrical batteries 1 whose side surfaces are covered with an insulating tube, and the insulating plates 2 made of synthetic resin or the like are formed by directly contacting the side surfaces of the batteries 10 to form a row of 5 batteries. The sides were indirectly abutted through each other and arranged in two rows.

In this configuration, as the cylindrical battery 1, a nickel-cadmium storage battery formed in a cylindrical shape using a group of wound electrodes was used. In this cylindrical battery, a nickel hydrogen storage battery is used as the alkaline storage battery in addition to the nickel cadmium storage battery described above, but it goes without saying that a lithium ion storage battery or other storage battery may be used in addition to the nickel hydrogen storage battery.

Needless to say, the insulating plates may be directly contacted with each other without being used if it is not necessary.

After fixing the periphery of the cylindrical battery group in which the cylindrical batteries are arranged with a fixing tape or the like, the cylindrical batteries 1 are connected in series using a connecting plate such as a nickel plate, and two cylinders located at one end are connected in series. Lead wires 3 and 3 were connected to the positive electrode terminal and the negative electrode terminal of the mold batteries 1 and 1, respectively.

The positive and negative terminals of the cylindrical battery 1 are located at the top and bottom, respectively, and the top and bottom of the cylindrical batteries 1 adjacent to each other in a row are arranged upside down to facilitate series connection. Then, the upper and lower surfaces of the arranged cylindrical battery groups were each covered with a spacer 4 made of a sheet of electrically insulating paper.

Details of the 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 in a lid-like body, for example, like a lunch box lid, by bending the entire circumference of a sheet-shaped electric insulating paper having a thickness of about 2 to 5 mm. Therefore, it is not necessary to create a molding mold for the spacer according to the number of batteries and the battery arrangement configuration, 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 cut out in a bay shape by cutting to form a recessed portion 42. This is for pulling out the lead wires 3 and 3 from the recessed portion 42, and the lead wires formed on both side surfaces are those having the lead wires on the right side, those on the left side, or both. This is because it can be used in common with. Of course, if it is desired to use the dedicated spacer 4 in each case, the recessed portion 42 may be formed in only one of them. Two spacers 4 were prepared and covered on the upper and lower surfaces of the cylindrical battery group arranged respectively, the lead wire was pulled out laterally from the recess 42, and the corners around the cylindrical battery group were also covered. ..

At this time, when the upper surface protrudes upward as a connecting portion of the lead wires 3 and 3, use a spacer 4 having a step 44 provided on the lead wire drawing side of the upper surface portion 43 as shown in FIG. Is preferable.

Further, in the above embodiment, the spacer 4 is formed by bending one sheet of electrically insulating paper, but it does not necessarily have to be composed of one sheet of electrically insulating paper. For example, one spacer 4 may be formed by using two or more sheets of electrically insulating paper and bonding them to each other. However, from the viewpoint of preventing an increase in the number of members, it is desirable to configure the spacer 4 with a single piece of electrically insulating paper.

Further, although the type of electrically insulating paper used for the spacer 4 is not particularly described, various types can be used. For example, condenser paper, coil insulating paper, press board, polyester film processed paper, fiber paper and the like can be used. Among these, it is preferable to use a press board which is a high-density board in which paper is laminated because it is easy to bend.

Further, the paper constituting the spacer 4 may have at least electrical insulation, and it is not always necessary to use insulating paper. For example, it is also possible to use a paper material formed in a lid-like body, which is processed so as to have electrical insulation by applying an insulating material to the inner surface facing the storage space of the cylindrical battery group. is there.

Next, the cylindrical battery group whose upper and lower surfaces are covered with a spacer 4 formed in a 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 has open left and right side surfaces of the cylindrical battery group.

In this way, a drop test was conducted in which the assembled battery constructed by using a press board as a spacer was dropped from a height of 75 cm onto a plate having a thickness of 10 cm, and as a result of confirming the collapse state, 1 out of 10 assembled batteries was found. None of the pieces had a distorted shape, but only one had a hole in the heat-shrinkable tube surrounding it.

On the other hand, for comparison, in the assembled battery covered with the press board adhered without using the heat-shrinkable tube, the shape of one out of ten batteries is distorted, and the insulating tube surrounding the cylindrical battery is cracked. There were 5 of them.

As described above, the assembled battery of the present invention is not distorted in shape due to dropping, and it is possible to prevent cracks in the insulating tube of the cylindrical battery. Therefore, if the assembled battery is accidentally dropped before shipping, but the cylindrical battery itself is normal, the product of the present invention only needs to replace the heat-shrinkable tube that covers the cylindrical battery group. In the example assembled battery, the connection plate had to be removed and the side surface of the cylindrical battery had to be newly covered with an insulating tube and reassembled.

1 Cylindrical battery 2 Insulation plate 3 Lead wire 4 Spacer 41 Hanging wall 42 Recessed part 43 Top surface part 44 Step 5 Heat shrinkable tube 10 sets Battery

Claims (6)

It is characterized in that the upper and lower surfaces and corners formed by arranging a large number of cylindrical batteries in contact with each other are covered with spacers made of paper, and the whole is wrapped with a heat-shrinkable tube. Batteries assembled. The assembled battery according to claim 1, wherein the spacer is a lid-like body formed by bending a sheet of paper material. The assembled battery according to claim 1 or 2, wherein the spacer is a part of the outer side of the sheet-shaped paper material cut out in a bay shape as a lead wire outlet. .. The assembled battery according to any one of claims 1 to 3, wherein the spacer is formed with a step on the lead wire drawing 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 electrically insulating paper. The assembled battery according to claim 5, wherein the electrically insulating paper is made of a capacitor paper, a coil insulating paper, a press board, a polyester film processed paper, or a fiber paper.

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