Battery

Abstract

To obtain a battery that is easy to be removed from a battery box.SOLUTION: A battery 1 includes a positive electrode can having a cylindrical portion and a bottom 23 that covers one of the openings of the cylindrical portion formed integrally therewith, a negative electrode terminal plate that is provided at the other opening of the cylindrical portion and has a negative electrode terminal that protrudes outward beyond the other opening of the cylindrical portion, a substrate 51 that covers the outer peripheral surface of the cylindrical portion, and a covering material 52 that covers the surface of the substrate 51, and the covering material 52 is divided into a string-shaped portion 54 that is surrounded by a notch 53 and can be peeled off from the substrate 51, and a peripheral portion 55 that surrounds the periphery of string-shaped portion 54, and at one end of the string-shaped portion 54, the ends of notch 53 are spaced apart, and the string-shaped portion 54 and the peripheral portion 55 are connected.SELECTED DRAWING: Figure 3

Description

[Technical field]

[0001] SUMMARY OF THE DISCLOSURE The present invention relates to a battery. [Background technology]

[0002] Cylindrical batteries are known (see, for example, Patent Document 1). In some cases, batteries are used by being fitted into a battery box of a device in which they are used. When a battery is used up, it is removed from the battery box in order to be replaced with a new battery. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Patent Publication No. 2022-18320 Summary of the Invention [Problem to be solved by the invention]

[0004] In some cases, it may be difficult to remove the battery from the battery box because the gap between the battery box and the battery is small or the external shape of the battery expands due to the expansion of the internal active material.

[0005] The disclosed technology has been made in consideration of the above points, and has an object to obtain a battery that is easy to remove from a battery box. [Means for solving the problem]

[0006] A battery according to one embodiment of the present disclosure comprises a positive electrode can having a cylindrical portion and a bottom portion integrally formed with each other to cover one of the openings of the cylindrical portion, a negative electrode terminal plate provided in the other opening of the cylindrical portion and having a negative electrode terminal formed thereon that protrudes outward beyond the other opening of the cylindrical portion, a substrate covering the outer peripheral surface of the cylindrical portion, and a covering material covering the surface of the substrate, wherein the covering material is divided into a string-shaped portion surrounded by a notch so as to be peelable from the substrate, and a peripheral portion surrounding the periphery of the string-shaped portion, and at one end of the string-shaped portion, the ends of the notches are spaced apart to connect the string-shaped portion and the peripheral portion. Effect of the Invention

[0007] According to one aspect of the battery disclosed in the present application, a battery that can be easily removed from a battery box can be obtained. [Brief description of the drawings]

[0008] [Figure 1] FIG. 1 is a perspective view of a battery according to a first embodiment. [Diagram 2] FIG. 2 is a cross-sectional view of the battery according to the first embodiment. [Diagram 3] FIG. 3 is a perspective view of the battery showing a state in which the string-shaped portions have been peeled off from the substrate. [Figure 4] FIG. 4 is a diagram showing a procedure for removing the battery from the battery box according to the first embodiment. [Diagram 5] FIG. 5 is a diagram showing a procedure for removing the battery from the battery box according to the first embodiment. [Figure 6] FIG. 6 is a perspective view of a battery according to a modification of the first embodiment. [Figure 7] FIG. 7 is a perspective view of a battery according to a modified example, showing a state in which the string-shaped portion has been peeled off. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0009] Hereinafter, embodiments of the battery disclosed in the present application will be described in detail with reference to the drawings. Note that the battery disclosed in the present application is not limited to the following embodiments.

[0010] (Embodiment 1) Fig. 1 is a perspective view of the battery according to embodiment 1. Fig. 2 is a cross-sectional view of the battery according to embodiment 1. Battery 1 includes a positive electrode can 2, a negative electrode terminal plate 3, a gasket 4, and an exterior label 5.

[0011] The positive electrode can 2 has a cylindrical tube portion 21 and a bottom portion 23 that closes one opening 22 of the tube portion 21. The tube portion 21 and the bottom portion 23 are formed integrally. A positive electrode terminal 24 is formed on the bottom portion 23 of the positive electrode can 2.

[0012] The negative electrode terminal plate 3 is provided in the other opening 25 of the cylindrical portion 21 of the positive electrode can 2. The negative electrode terminal 31 is formed. The negative electrode terminal 31 is formed so as to protrude outward from the opening 25 when provided in the opening 35. The shape of the negative electrode terminal 31 when viewed along the central axis of the cylindrical portion 21 is circular. The gasket 4 is sandwiched between the edge of the opening 25 of the positive electrode can 2 and the negative electrode terminal plate 3. The gasket 4 is formed of an insulating material. The gasket 4 is sandwiched between the edge of the opening 25 of the positive electrode can 2 and the negative electrode terminal plate 3, thereby insulating the positive electrode can 2 and the negative electrode terminal plate 3. In addition, the gasket 4 is sandwiched between the edge of the opening 25 of the positive electrode can 2 and the negative electrode terminal plate 3, thereby forming an internal space surrounded by the positive electrode can 2, the negative electrode terminal plate 3, and the gasket 4 inside the battery 1.

[0013] The internal space of the battery 1 surrounded by the positive electrode can 2 and the negative electrode terminal plate 3 contains a positive electrode mixture, a negative electrode mixture, a separator, an electrolyte, etc., but detailed description of these will be omitted.

[0014] The exterior label 5 has a base material 51 and a covering material 52. The base material 51 covers the outer peripheral surface of the tube portion 21, and the overall shape of the base material 51 is cylindrical. The base material 51 is formed of an insulating material. A partial area of ​​the base material 51 functions as a mount for the sticker. The area that functions as a mount will be described later.

[0015] The facing material 52 covers the surface of the base material 51, and the overall shape of the facing material 52 is cylindrical. The facing material 52 has a linear cut 53 formed therein, penetrating from the front surface to the back surface.

[0016] Both ends of the notch 53 are located closer to the negative electrode terminal plate 3 than the bottom 23. The notch 53 extends along the axial direction of the tubular portion 21. The notch 53 has a generally U-shape overall. The covering material 52 is divided into a string-like portion 54 surrounded by the notch 53 and a surrounding portion 55 surrounding the periphery of the string-like portion 54. As the notch 53 extends along the axial direction of the tubular portion 21, the string-like portion 54 also extends along the axial direction of the tubular portion 21.

[0017] At root portion 56, which is one end of string-like portion 54, the ends of notches 53 are spaced apart. At root portion 56 of string-like portion 54, string-like portion 54 and peripheral portion 55 are connected. Note that in the vicinity of the end of notch 53, the distance between the portions increases as they approach the end. This makes root portion 56 of string-like portion 54 wider than other portions.

[0018] A circular portion 58 is formed at tip portion 57, which is the other end of string-like portion 54. The diameter of circular portion 58 is larger than the diameter of negative electrode terminal 31. An adhesive is provided on the surface of string-like portion 54 that comes into contact with substrate 51. The region of substrate 51 that comes into contact with string-like portion 54 functions as a backing for the sticker. This makes it possible to peel string-like portion 54 from substrate 51.

[0019] The adhesive adheres to string-shaped portion 54 when string-shaped portion 54 is pulled away from substrate 51. The adhesive used has a property that it does not lose its adhesiveness even when peeled off from substrate 51. Therefore, circular portion 58 formed at one end of string-shaped portion 54 can be attached to negative electrode terminal plate 3 after string-shaped portion 54 is peeled off from the substrate.

[0020] The battery 1 is generally used by fitting it into a battery box. The battery box is formed with a terminal that contacts the positive electrode terminal 24 and a terminal that contacts the negative electrode terminal 31. The battery 1 is removed from the battery box by pulling the battery 1 with a fingernail or the like inserted into the gap between the battery box and the battery 1. However, there are cases where it is difficult to remove the battery 1 from the battery box because the gap between the battery box and the battery is small or the external shape of the battery 1 expands due to expansion of the internal active material.

[0021] In the battery 1 described above, the covering material 52 is divided into a string-like portion 54 surrounded by the notch 53 and capable of being peeled off from the base material 51, and a peripheral portion 55 surrounding the periphery of the string-like portion 54. Moreover, at one end of the string-like portion 54, the ends of the notch 53 are spaced apart, and the string-like portion 54 and the peripheral portion 55 are connected at a base portion 56 of the string-like portion 54.

[0022] FIG. 3 is a perspective view of the battery showing a state in which the string-like portion is peeled off from the substrate. FIG. 4 and FIG. 5 are diagrams showing a procedure for removing the battery according to the first embodiment from the battery box. Even if the string-like portion 54 is peeled off from the substrate, the string-like portion 54 is connected to the battery 1 at the base portion 56. Therefore, by pulling the string-like portion 54, the battery 1 can be easily pulled with a strong force compared to pulling with a fingernail or the like. Therefore, even if it is difficult to remove the battery 1 from the battery box 6 because the gap between the battery box 6 and the battery 1 is small, the battery 1 can be easily removed from the battery box 6 as shown in FIG. 4 and FIG. 5 by peeling the string-like portion 54 from the substrate 51 and pulling it. In most cases, the battery 1 is removed from the battery box 6 when the battery 1 has been used. Therefore, by peeling off the string-like portion 54, it is possible to visually grasp that the battery 1 has been used.

[0023] In addition, the base portion 56 of the string-like portion 54 is located closer to the negative electrode terminal plate 3 than the bottom portion 23. This allows the battery 1 to be removed from the battery box by pulling the string-like portion 54 and pulling it out from the negative electrode terminal plate 3 side.

[0024] In addition, a circular portion 58 is formed at the tip 57 of the string-shaped portion 54 with a diameter larger than the diameter of the negative electrode terminal 31. In addition, an adhesive that does not lose its adhesiveness even when peeled off from the base material 51 is attached to the string-shaped portion 54. In addition, since the base of the string-shaped portion 54 is provided in a position close to the negative electrode terminal plate 3, the circular portion 58 formed at the tip 57 of the string-shaped portion 54 can be attached to the negative electrode terminal 31. Since the diameter of the circular portion 58 is larger than the diameter of the negative electrode terminal 31, the circular portion 58 can cover the entire negative electrode terminal plate 3. This prevents a conductor from coming into contact across the edge of the opening 25 of the tube portion 21 of the battery 1 removed from the battery box 6 and the negative electrode terminal 31, causing a short circuit between the positive electrode can 2 and the negative electrode terminal plate 3.

[0025] If the diameter of the circular portion 58 is larger than the diameter of the opening 25 of the tubular portion 21, the circular portion 58 can cover the entire negative terminal plate 3 and can be attached so as to straddle between the edge of the opening 25 of the tubular portion 21 and the negative terminal plate 3. This can more reliably prevent a conductor from coming into contact with the edge of the opening 25 of the tubular portion 21 of the battery 1 removed from the battery box and the negative terminal plate 3.

[0026] Furthermore, because the string-like portion 54 extends along the axial direction of the tube portion 21, although the string-like portion 54 may not be visible depending on the direction from which the outer surface of the tube portion 21 is viewed, the entire string-like portion 54 can be exposed from the battery box 6 as shown in Fig. 4. Therefore, if the string-like portion 54 is fitted into the battery box 6 in a position in which it is exposed, the string-like portion 54 can be easily peeled off.

[0027] Furthermore, by making the width of the string-like portion 54 2 mm or more, the strength of the string-like portion 54 can be ensured and the occurrence of tearing when the string-like portion 54 is pulled can be suppressed. Furthermore, by making the thickness of the covering material 52 50% or more of the thickness of the base material 51, the strength of the string-like portion 54 can be ensured and the occurrence of tearing when the string-like portion 54 is pulled can be suppressed.

[0028] A notch may be formed in at least one of string-like portion 54 and peripheral portion 55 so as to provide a gap between circular portion 58 and cutout 53. In this case, by inserting a fingernail or the like into the gap between circular portion 58 and cutout 53, string-like portion 54 can be easily peeled off from substrate 51.

[0029] Even if the circular portion 58 is not provided, it is possible to obtain the effect of easily removing the battery 1 from the battery box by pulling the string-like portion 54. Furthermore, when it is not necessary to attach the string-like portion 54 separated from the base material 51, such as when the circular portion 58 is not provided, no adhesive is required. In this case, the cut 53 separating the string-like portion 54 from the peripheral portion 55 may be formed in a broken line, and the cut 53 may be broken to separate the string-like portion 54 from the base material 51 and allow the string-like portion 54 to be pulled.

[0030] In addition, the root portion 56 of the string-shaped portion 54 may be located closer to the bottom 23 of the tube portion 21 than the negative terminal plate 3. There are cases where the terminal that is provided on the battery box 6 and contacts the negative terminal 31 is formed of a coil spring. In such cases, it may be easier to remove the battery 1 by pulling the positive terminal 24 side, i.e., the bottom 23 side. If the root portion 56 of the string-shaped portion 54 is located closer to the bottom 23, the battery 1 can be easily removed from the battery box 6 by pulling the string-shaped portion 54 to pull the bottom 23 side.

[0031] Fig. 6 is a perspective view of a battery according to a modified example of embodiment 1. Fig. 7 is a perspective view of the battery according to the modified example, showing a state in which the string-like portion has been peeled off. In battery 1 according to the modified example, notches 53 and string-like portion 54 extend in the circumferential direction around tube portion 21. The mode of extending in the circumferential direction also includes a mode of extending in a spiral shape around tube portion 21.

[0032] Since the string-like portion 54 extends around the tubular portion 21 in the circumferential direction, the string-like portion 54 can be seen regardless of the orientation of the battery 1 fitted in the battery box 6, and the battery 1 is not difficult to remove without noticing the presence of the string-like portion 54. When the string-like portion 54 is formed by extending it in a spiral shape, it is possible to form the string-like portion 54 longer than the length along the axial direction of the tubular portion 21. Therefore, when the string-like portion 54 is formed by extending it in a spiral shape, it is possible to form the string-like portion 54 with a length that allows the circular portion 58 to be attached to the negative terminal 31 while providing the root portion 56 at a position closer to the bottom 23 than the negative terminal plate 3. [Explanation of symbols]

[0033] 1 battery 2 Positive electrode can 3 Negative terminal plate 4 Gasket 5 Exterior Label 6 Battery box 21 Cylinder part 22,25 aperture 23 Bottom 24 Positive terminal 31 Negative terminal 51 Base material 52 Covering materials 53 Cutting 54 Cord-like part 55 Surrounding area 56 Base 57 Tip 58 Circular section

Claims

1. a positive electrode can having a cylindrical portion and a bottom portion closing one opening of the cylindrical portion, the positive electrode can being integrally formed with the cylindrical portion; a negative electrode terminal plate provided in the other opening of the cylindrical portion and having a negative electrode terminal formed thereon that protrudes outward beyond the other opening of the cylindrical portion; A base material covering an outer peripheral surface of the cylindrical portion; A covering material covering a surface of the base material, The facing material is divided into a string-shaped portion surrounded by a cut and capable of being peeled off from the base material, and a peripheral portion surrounding the string-shaped portion, A battery in which, at one end of the string-shaped portion, the ends of the notches are spaced apart and the string-shaped portion and the peripheral portion are connected.

2. The battery according to claim 1 , wherein one end of the string-shaped portion is located closer to the negative electrode terminal plate than the bottom portion.

3. 3. The battery according to claim 2, wherein the other end of the string-shaped portion is a circular portion having a diameter larger than a diameter of the negative electrode terminal.

4. 4. The battery according to claim 3, wherein the other end of the string-shaped portion is a circular portion having a diameter larger than a diameter of the other opening of the cylindrical portion.

5. The battery according to claim 1 , wherein one end of the string-shaped portion is provided at a position closer to the bottom than the negative electrode terminal plate.

6. The battery according to claim 1 , wherein the string-like portion extends in a circumferential direction of the cylindrical portion.

7. The battery according to claim 1 , wherein the string-shaped portion extends along the axial direction of the cylindrical portion.

8. The battery according to claim 1 , wherein the width of the string-shaped portion is 2 mm or more.

9. The battery according to claim 1 , wherein the thickness of the covering material is 50% or more of the thickness of the base material.

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