JP2007141513A - Pack battery - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To improve a seal-breaking property for a battery pack made by bundling a plurality of cylindrical batteries with shrink packaging. <P>SOLUTION: The battery pack is provided with a row of cylindrical batteries aligned in a row so that an outer periphery face of each of the plurality of cylindrical batteries 1<SB>1</SB>to 1<SB>8</SB>is in contact with the other, a heat-shrinkable film 3 for bundling the row of the cylindrical batteries, notched parts 4 formed at the heat-shrinkable film 3 so as to oppose gaps between an outer periphery face of adjacent cylindrical batteries, a first indicator label 5 fixed on the heat-shrinkable film 3 so as to coat the notched parts 4, and first perforations 7<SB>1</SB>to 7<SB>2</SB>formed in parallel with the alignment direction of the cylindrical batteries on the first indicator label 5. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a battery pack in which a plurality of cylindrical batteries are bundled by shrink wrapping.

  A battery pack in which a plurality of cylindrical batteries are arranged in a row so that the outer peripheral surfaces of the batteries are in contact with each other and these batteries are bundled by shrink wrapping is known. Polyethylene terephthalate (hereinafter referred to as PET) film and polyolefin (hereinafter referred to as PO) film are used for the heat shrinkable film used in the shrink wrapping. PET films are frequently used when the number of batteries is 4 or less. When the number of batteries is 4 or more, PO films are frequently used. Since the heat-shrinkable film made of PO is sticky, it has a characteristic that it is not easily torn when dropped even if the thickness of the film is reduced. For this reason, it is a material suitable for a pack battery with many numbers.

  The pack battery that is shrink-wrapped is required to have improved openability in order to provide more universal products. In Patent Document 1 and Patent Document 2, a plurality of cylindrical batteries assembled in parallel are bundled with a heat-shrinkable film, and a cut portion or a perforation is provided in the heat-shrinkable film, thereby improving the openability of the battery pack. I'm trying.

However, in particular, a heat-shrinkable film made of PO has a stickiness, so that even when a perforation is provided, the film stretches during opening and cannot be easily opened.
JP 2001-130626 A JP 2002-96865 A

  An object of the present invention is to provide a battery pack having excellent openability.

The battery pack according to the present invention includes a plurality of cylindrical batteries arranged in a row so that their outer peripheral surfaces are in contact with each other;
A heat shrinkable film for bundling the rows of cylindrical batteries together;
A notch formed in the heat-shrinkable film so as to face the gap between the outer peripheral surfaces of adjacent cylindrical batteries;
A first display label fixed on the heat-shrinkable film so as to cover the notch,
The first display label includes a first perforation formed in parallel with the arrangement direction of the cylindrical batteries.

In addition, the battery pack according to the present invention includes a plurality of cylindrical batteries arranged in a row so that their outer peripheral surfaces are in contact with each other,
A first seal portion fixed to an outer peripheral surface portion positioned on a side surface parallel to a battery arrangement direction of the cylindrical battery row, and a side surface positioned opposite to the side surface to which the first seal portion is fixed A second seal portion fixed to the outer peripheral surface portion, and a terminal covering portion that is positioned between the first seal portion and the second seal portion and covers one terminal of the plurality of cylindrical batteries A second display label comprising:
A third perforation formed on the first seal portion of the second display label so as to face a boundary line between the cylindrical batteries, and the cylindrical battery in which the second display label is fixed. A heat-shrinkable film to bundle the rows of
A notch formed in the heat-shrinkable film;
And a first display label fixed on the heat-shrinkable film so as to cover the notch.

  ADVANTAGE OF THE INVENTION According to this invention, the battery pack excellent in openability can be provided.

  Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.

(First embodiment)
1 is a schematic perspective view of the battery pack according to the first embodiment of the present invention as viewed from the front side, and FIG. 2 is a state before the first display label in the battery pack of FIG. 1 is attached. It is the perspective view which showed typically. 3 is a perspective view schematically showing a state in which the first display label of the battery pack of FIG. 1 is peeled off, and FIG. 4 is a side view of the state of FIG. 3 viewed from the positive electrode terminal side.

As shown in FIGS. 1 and 2, a plurality of (for example, eight) cylindrical batteries (for example, alkaline dry batteries and manganese dry batteries) ₁₁ to ₁₈ have surfaces on which positive electrode terminals 2 are formed (hereinafter, positive electrodes). They are arranged in a row so that their outer peripheral surfaces are in contact with each other. The rows of cylindrical batteries 1 ₁ to ₁₈ are bundled together by a heat shrinkable film 3.

As shown in FIG. 2, the arc-shaped cutout 4 is formed in the heat-shrinkable film 3 between the cylindrical battery 1 ₁ located at the end of the row and the adjacent cylindrical battery 1 _2. It is formed to face (valley). Both ends of the cutout portion 4 are extended in a direction in which the first display label is peeled off. Although both ends of the notch 4 may be extended in a direction opposite to the direction in which the first display label is peeled off, the heat shrinkable film 3 can be more easily opened by extending in the peeling direction.

The position of the notch 4 is not limited to the position shown in FIG. 2, and can be provided at a position facing a gap (valley) existing between the cylindrical batteries 1 ₂ to ₁₈ , for example. It is also possible to form it at a plurality of locations. Incidentally, there is an advantage that when the face the gap existing between the cylindrical battery located at the end of the column 1 ₁ and the cylindrical battery 1 ₂ of the next, a thermally shrinkable film 3 easily remove the battery.

  Moreover, the shape of the notch 4 is not limited to an arc shape, and can be, for example, a U-shape.

The first display label (also called a print label) 5 is made of a rectangular sheet on which information such as a product name and a barcode is displayed. The first display label 5 is fixed on the heat-shrinkable film 3 and faces the outer peripheral surface of the cylindrical batteries ₁₁ to ₁₈ through the heat-shrinkable film 3. First display label 5, except for one end portion in the short side direction (the end portion corresponding to the cylindrical battery 1 _1), the back surface is in sealing surface (adhesive surface). One end portion in the short side direction functions as a peeling margin 6. The dimension of the peeling margin 6 is not particularly limited, but if the peeling margin 6 overlaps the cutout portion 4, it becomes difficult to open the heat-shrinkable film 3, so that the size does not cover the cutout portion 4. It is desirable to do.

The first perforations 7 ₁ and 7 ₂ are formed on the first display label 5 in parallel with the arrangement direction of the cylindrical batteries. Specifically, the first display label 5 is formed at both ends on the long side. The distance D between the first perforations 7 ₁ and 7 ₂ and the long side of the first display label 5 is set to a size corresponding to 10 to 20% of the length of the short side of the first display label 5. It is desirable. By setting the distance D to 10% or more, the first display label 5 can be easily separated along the _first perforations 7 ₁ and 7 ₂ , so that the heat-shrinkable film 3 can be easily opened. . At the same time, by setting the distance D to 20% or less, it becomes easy to take out the battery from the opened heat-shrinkable film 3. In particular, when the number of cylindrical batteries is 8, the distance D is desirably 5 to 8 mm.

In the battery pack having the above-described configuration, as shown in FIGS. 3 and 4, when the first display label 5 is peeled off from the peeling margin 6, the first display label 5 is removed from the first perforations 7 ₁ , 7. Can be peeled along ₂ . Since the heat-shrinkable film 3 in which the cutout portion 4 is formed is fixed to the back surface of the first display label 5, the first display label 5 is placed along the _first perforations 7 ₁ and 7 ₂ . At the same time as the peeling, the heat-shrinkable film 3 is torn starting from the notch 4. Thus, the heat-shrinkable film 3 can be easily opened.

As shown in FIG. 5, the first display label 5 includes a cylindrical battery 12 located _second from the end of the row to a cylindrical battery ₁₇ located second from the opposite end of the row. it is possible to form the second perforations 8 _{1-8 5} to the boundary line and a position facing the outer peripheral surface between the cylindrical batteries. Thereby, the heat-shrinkable film 3 can be opened separately for each battery. In addition, since the second perforations 8 ₁ to 8 ₅ are formed between the upper long side of the first display label 5 and the first perforation 7 ₂ , the heat-shrinkable film 3 is, for example, the second perforation. when opened up perforations _82, it is possible to prevent the battery 1 ₄ to 1 ₈ remaining unused fall apart. Even to form a second perforations 8 _{1-8 5} between the first perforation ₇₁ to the lower long side of the first label 5, the opening of the heat-shrinkable film batteries 1 This can be done separately, and the remaining unused batteries can be prevented from falling apart.

  In FIG. 1 to FIG. 5 described above, the first perforation is formed at both ends on the long side of the first display label 5, but it may be at one end on the long side. If the first perforation is formed only at one end portion on the long side of the first display label 5, the first display label 5 can be peeled off leaving only one end portion on the long side. The opening area of the film 3 can be increased. As a result, the heat-shrinkable film 3 becomes easier to open and the battery can be taken out more easily. When the second perforation is provided, the length of the second perforation may be equal to the length of the short side of the first display label 5 or from the long side of the first display label 5 to the second side. The second perforation may be formed except for the first perforation.

(Second Embodiment)
A battery pack according to a second embodiment will be described with reference to FIGS. FIG. 6 is a schematic perspective view of the battery pack according to the second embodiment of the present invention as viewed from the front side. FIG. 7 is a schematic perspective view of the battery pack in a state before the first display label is attached, as viewed from the front side, and FIG. 8 is a schematic view of the battery pack of FIG. 7 as viewed from the rear side. It is a perspective view. FIG. 9 is a schematic diagram showing a coating process with a heat-shrinkable film. Members similar to those described in FIGS. 1 to 5 are denoted by the same reference numerals and description thereof is omitted.

  The battery pack according to the second embodiment further includes a second display label attached directly to the cylindrical battery of the battery pack according to the first embodiment. This will be specifically described below.

The second display label 9 (also called a print label) is made up of a single rectangular sheet on which information such as a product name and a barcode is displayed. The second display label 9 directly covers the columns of the cylindrical batteries ₁₁ to _{18 while} being folded in a U-shape. The second display label 9 is provided between the first seal portion 9a and the second seal portion 9b, and the first seal portion 9a and the second seal portion 9b. It is comprised from the terminal coating | coated part 9c which is located in and connects these. In order to facilitate separation of the display label, the length L _{2 of} the second seal portion 9b (the length in the direction parallel to the height of the cylindrical battery) is shorter than the length L _{1 of} the first seal portion 9a. It is. Information to be displayed on the second display label 9 may be printed on any of the first seal portion 9a, the second seal portion 9b, and the terminal covering portion 9c. Furthermore, it is desirable to display the handling method of the second display label in addition to the barcode and the product name.

The second sealing portion 9b of the second label 9, as shown in FIG. 7, is adhered to the outer peripheral surface portion positioned parallel sides cell arrangement direction of the rows of the cylindrical batteries 1 ₁ to 1 ₈ ing. As shown in FIG. 8, the 1st seal | sticker part 9a is affixed on the outer peripheral surface part of the side surface located in the other side of the side surface in which the 2nd seal | sticker part 9b was affixed. The terminal covering portion 9c covers the surface (hereinafter referred to as the positive terminal surface) on which the positive terminals 2 of the cylindrical batteries 1 ₁ to ₁₈ are formed.

For example, the seven third perforations 10 ₁ to 10 ₇ are opposed to the boundary line between the outer peripheral surfaces of the cylindrical batteries 1 ₁ to _{18 on} the first seal portion 9 a of the second display label 9. Is formed. The faces the boundary of the cylindrical battery 1 ₁ and the cylindrical battery 1 ₂ is the third perforation 10 _1. The third perforations 10 ₂ is opposed to the boundary line of the cylindrical battery 1 ₂ and cylindrical cells 1 _3. After that, the third perforations are 10 ₃ to 10 _{7 in} order from the left side of the column.

The rows of cylindrical batteries 1 ₁ to ₁₈ with the second display label 9 attached are bundled together by the heat-shrinkable film 3. Specifically, as shown in FIG. 9, a row of cylindrical batteries ₁₁ to ₁₈ to which the second display label 9 is attached is inserted into the tubular heat-shrinkable film 3. Thereafter, the rows of cylindrical batteries ₁₁ to ₁₈ are covered with the heat-shrinkable film 3 by shrink wrapping that heat-shrinks the heat-shrinkable film 3 and bundled together. Subsequently, after forming the cutout portion 4 in the heat-shrinkable film 3, the battery pack according to the second embodiment is obtained by sticking the first display label 5. The first display label 5 can be disposed on the side surface of the second display label 9 covered with the first seal portion 9a, but as illustrated in FIG. 6, the second seal portion 9b By disposing on the side surface covered with, opening with the first display label 5 becomes easier.

In the battery pack having the above-described configuration, when the first display label 5 is peeled off from the peeling margin 6 along the _first perforations 7 ₁ and 7 ₂ , the heat-shrinkable film 3 starts from the notch 4. Thus, the heat-shrinkable film 3 can be easily opened.

Even opening the heat-shrinkable film 3, the outer peripheral surface portion of the cylindrical battery 1 ₁ to 1 ₈ is fixed to the first sealing portion 9a and the second sealing portion 9b of the second label 9 Therefore, it is possible to prevent the batteries from falling apart. When the second display label 9 is stripped along the third perforations 10 ₁ to 10 ₇ of the first seal portion 9a, the batteries can be subdivided one by one. Further, since the unused battery is still attached with the second display label 9, it is easy to separate old and new. Further, when the second label 9 for example along a third perforation 10 ₁ torn off, can be taken out only cylindrical battery 1 _1, the battery 1 _{2-1 8} remaining unused first Since it is fixed to the first seal portion 9a and the second seal portion 9b, it does not fall apart and can be stored in a state where unused batteries are bundled together.

  Since the outer peripheral surface portion of the battery is located on the side surface parallel to the battery arrangement direction of the column of cylindrical batteries, there is some unevenness. By fixing the first display label 5 on the heat-shrinkable film 3 covering the second display label 9, the smoothness of the first display label 5 can be improved, and the first display label 5 Reading errors of the bar code displayed on the label 5 can be reduced.

6 to 9 described above, the third perforations 10 ₁ to 10 ₇ are formed in the first seal portion 9a of the second display label 9, but not only the first seal portion 9a, It can also be formed on the terminal covering portion 9c. An example of this is shown in FIG. If the third perforations 10 ₁ to 10 ₇ are also formed in the terminal covering portion 9c, the second display label 9 can be more easily torn off. On the other hand, it is desirable to form the _first perforations 10 ₁ to 10 ₇ only on the first seal portion 9a in terms of storing unused batteries in a bundled state.

  6 to 9 described above, the positive electrode terminal surface is covered with the second display label 9, but the surface on which the negative electrode terminal 11 is formed is formed on the second display label 9 as shown in FIG. You may coat | cover with the terminal coating | coated part 9c.

In FIGS. 6 to 11 described above, the first display label 5 is sized so as to cover all the cylindrical batteries ₁₁ to ₁₈ , but the size of the first display label 5 is limited to this. Is not to be done. When the second display label 9 is used in combination, the size of the first display label 5 can be made large enough to cover the cutout portion 4. Thus, the heat-shrinkable film 3 can be easily opened without providing the first perforation on the small first display label 5. An example of this is shown in FIG. Notches 4 are formed on the heat-shrinkable film 3 in a U-shape, and faces a gap (valleys) that exist between the cylindrical batteries 1 ₂ and the cylindrical batteries 1 ₃ next to it. First display label 5, the covers the notches 4, the heat-shrinkable so as to be opposed to the the opposite end the second from the cylindrical battery 1 ₂ from end to a second cylindrical batteries 1 ₇ Attached to the film 3.

  Hereinafter, the constituent members of the battery pack according to the first and second embodiments will be described in more detail.

  The number of cylindrical batteries to be used is not particularly limited as long as it is plural, but 2 to 12 is appropriate. Further, the size of the cylindrical battery is not particularly limited, and can be used from single 1 type to single 5 type.

  Examples of the heat-shrinkable film include a polystyrene (PS) film and a polyolefin film. Among these, a polyolefin film is preferable. This is because damage to the film when an impact such as dropping the battery pack by mistake can be reduced. As the polyolefin material constituting the polyolefin film, for example, at least one of polyethylene (PE) and polypropylene (PP) can be used.

  Although the thickness of a heat-shrinkable film is not specifically limited, It is preferable to set it as the range of 15-30 micrometers.

  Although the thickness of a 1st display label and a 2nd display label is not specifically limited, It is preferable to set it as the range of 50-150 micrometers. The thicknesses of the first display label and the second display label may be the same or different.

  Moreover, the material of the first display label and the second display label is not particularly limited, but paper or synthetic paper is preferable.

  Note that the present invention is not limited to the above-described embodiment as it is, and can be embodied by modifying the components without departing from the scope of the invention in the implementation stage. In addition, various inventions can be formed by appropriately combining a plurality of constituent elements disclosed in the embodiment. For example, some components may be deleted from all the components shown in the embodiment. Furthermore, constituent elements over different embodiments may be appropriately combined.

The typical perspective view which looked at the battery pack which concerns on the 1st Embodiment of this invention from the front side. The perspective view which showed typically the state before sticking the 1st display label in the battery pack of FIG. The perspective view which showed typically the state which peeled the 1st display label of the battery pack of FIG. The side view which looked at the state of FIG. 3 from the positive electrode terminal side. The typical perspective view which looked at another pack battery concerning a 1st embodiment of the present invention from the front side. The typical perspective view which looked at the battery pack concerning the 2nd Embodiment of this invention from the front side. The typical perspective view which looked at the state before sticking the 1st display label in the battery pack of FIG. 6 from the front side. The typical perspective view which looked at the battery pack of FIG. 7 from the back side. The schematic diagram which shows the coating | coated process with a heat-shrinkable film. The typical perspective view which shows another example of the battery pack which concerns on 2nd Embodiment. The typical side view which shows another example of the battery pack which concerns on 2nd Embodiment. The typical side view which shows another example of the battery pack which concerns on 2nd Embodiment.

Explanation of symbols

1 ₁ to 1 ₈ ... cylindrical battery, 2 ... positive electrode terminal, 3 ... heat-shrinkable film, 4 ... notch, 5 ... first display label, 6 ... stripping margin, 7 _{1 to} 7 ₂ ... first perforation, 8 _{1-8 5} ... second perforations, 9 ... second label, 9a ... first seal portion, 9b ... second seal portion, 9c ... terminal cover part, 10 ₁ to 10 ₇ ... third perforation, 11 ... negative electrode terminal.

Claims (4)

A plurality of cylindrical batteries arranged in a row so that their outer peripheral surfaces are in contact with each other;
A heat shrinkable film for bundling the rows of cylindrical batteries together;
A notch formed in the heat-shrinkable film so as to face the gap between the outer peripheral surfaces of adjacent cylindrical batteries;
A first display label fixed on the heat-shrinkable film so as to cover the notch,
A battery pack, wherein the first display label includes a first perforation formed in parallel with an arrangement direction of the cylindrical battery.   A boundary between cylindrical batteries formed on the first display label and extending from a cylindrical battery located second from one end of the column of cylindrical batteries to a cylindrical battery located second from the other end. The battery pack according to claim 1, further comprising a second perforation formed so as to face the line. A plurality of cylindrical batteries arranged in a row so that their outer peripheral surfaces are in contact with each other;
A first seal portion fixed to an outer peripheral surface portion positioned on a side surface parallel to a battery arrangement direction of the cylindrical battery row, and a side surface positioned opposite to the side surface to which the first seal portion is fixed A second seal portion fixed to the outer peripheral surface portion, and a terminal covering portion that is positioned between the first seal portion and the second seal portion and covers one terminal of the plurality of cylindrical batteries A second display label comprising:
A third perforation formed on the first seal portion of the second display label so as to face a boundary line between the cylindrical batteries, and the cylindrical battery in which the second display label is fixed. A heat-shrinkable film to bundle the rows of
A notch formed in the heat-shrinkable film;
A battery pack comprising: a first display label fixed on the heat-shrinkable film so as to cover the notch.   The battery pack according to claim 1, wherein the heat-shrinkable film is made of polyolefin.

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