Battery adhesive tape and battery with the tape attached.

Abstract

This relates to battery adhesive tape and batteries to which the tape has been attached. [Solution] The battery adhesive tape is a battery adhesive tape having an adhesive portion formed on one surface, wherein the adhesive portion may include a weak adhesive portion, a strong adhesive portion with stronger adhesive force than the weak adhesive portion, and a perforated line drilled along the outer edge of the strong adhesive portion.

Description

Technical Field

[0001] The present disclosure relates to a battery-attaching tape and a battery to which the tape is attached, and more particularly, to a battery-attaching tape having a structure with improved ease of battery disassembly and a battery to which the tape is attached.

Background Art

[0002] A secondary battery is a battery that can be charged and discharged, unlike a primary battery that cannot be charged. Low-capacity secondary batteries are used in portable small electronic devices such as smartphones, feature phones, laptop computers, digital cameras, and camcorders, and high-capacity secondary batteries are widely used as power sources for motor drives such as hybrid vehicles and electric vehicles and as batteries for power storage. Such secondary batteries include an electrode assembly composed of a positive electrode and a negative electrode, a case for housing the electrode assembly, and electrode terminals connected to the electrode assembly.

[0003] In some of the above-described batteries, for the convenience of the user, a pull tab tape can be attached to the battery cell during the battery separation process. Here, when there is a strong adhesive portion on the tape attachment surface, it is difficult to separate from the battery cell, so there is a problem that it is difficult to remove the pull tab tape. Also, when the area of the weak adhesive portion is increased without using a strong adhesive portion, floating between the pull tab tape and the cell may occur. Therefore, there is a need to overcome the above problems by changing the structure in the attachment area.

[0004] The above information disclosed in the background art of such an invention is only for improving the understanding of the background of the present invention, and thus may also include information that does not constitute the prior art.

Prior Art Documents

Patent Documents

[0005]

Patent Document 1

[0006] This disclosure provides a battery adhesive tape and a battery to which the tape is attached, which help prevent problems such as the tape lifting off the battery cells in situations such as when electronic devices are dropped, and which also improves the ease of battery disassembly.

[0007] However, the technical problems that this invention aims to solve are not limited to those mentioned above, and other problems not mentioned should be clearly understood by those skilled in the art from the description of the invention below. [Means for solving the problem]

[0008] According to one embodiment of the present disclosure for solving technical problems, the battery adhesive tape is a battery adhesive tape having an adhesive portion formed on one surface, wherein the adhesive portion may include a weak adhesive portion, a strong adhesive portion with stronger adhesive force than the weak adhesive portion, and a perforation line perforated along the outer edge of the strong adhesive portion. [Effects of the Invention]

[0009] The adhesive portion of the battery attachment tape according to various embodiments of this disclosure has multiple strongly adhesive portions surrounded by sequentially perforated lines in the direction in which the tape peels off, making it easier for the user to peel off the battery attachment tape. In addition, by having one or more non-adhesive portions, it is possible to prevent a part of the battery attachment tape from detaching from the battery cell due to dropping or distortion of the electronic device caused by carelessness during use, thereby preventing lifting and noise generation.

[0010] In the various embodiments of the present disclosure, the ease of peeling can be increased by forming the peeling direction of the battery adhesive tape and the extending direction of the strong adhesive portion in directions that are preferably perpendicular, or at least close to perpendicular.

[0011] The effects of this disclosure are not limited thereto, and other technical effects not mentioned herein should be clearly understood by those skilled in the art from the description of the invention set forth below. [Brief explanation of the drawing]

[0012] The following drawings and other illustrations attached to this specification illustrate preferred embodiments of the present invention and, together with the detailed description of the invention later, play a role in further understanding the technical concept of the present invention. Therefore, the present invention should not be analyzed in isolation from the matters described in such drawings. [Figure 1] This is a disassembled perspective view of a battery including a battery adhesive tape according to one embodiment of the present invention. [Figure 2] This figure shows the adhesive surface of a battery attachment tape according to one embodiment of the present invention. [Figure 3] This figure shows the adhesive surface of a battery attachment tape according to one embodiment of the present disclosure. [Figure 4] This is a perspective view showing a battery adhesive tape according to one embodiment of the present invention in a state where it is attached to a battery cell. [Figure 5] This figure shows a perforation line extending along a strongly bonded portion according to one embodiment of the present invention. [Figure 6] This is an enlarged view of area A in Figure 5, showing a state in which there is a space between the strongly bonded portion and the perforation line according to one embodiment of the present invention. [Figure 7] This is an enlarged view of area A in Figure 5, showing a state in which there is no space between the strongly bonded portion and the perforation line according to one embodiment of the present invention. [Figure 8] This figure shows the region where the fixing tape and strong adhesive portion according to one embodiment of the present invention overlap. [Figure 9]A diagram showing the width of the gripping portion and the width of the strong adhesion portion in the Y direction according to an embodiment of the present invention.

Mode for Carrying Out the Invention

[0013] <Summary of the Invention> According to an embodiment of the present disclosure, a plurality of perforation lines are arranged along the outer peripheral edge, and adjacent perforation lines can be arranged at a predetermined interval.

[0014] According to an embodiment of the present disclosure, the predetermined interval can be 0.4 mm.

[0015] According to an embodiment of the present disclosure, the strong adhesion portion can include a groove formed at a position corresponding to the predetermined interval between adjacent perforation lines.

[0016] According to an embodiment of the present disclosure, the gripping portion is further included on the side surface of the adhesion portion, and the strong adhesion portion overlaps with the gripping portion in the first direction and can extend in the second direction orthogonal to the first direction.

[0017] According to an embodiment of the present disclosure, the extension length of the strong adhesion portion can be equal to or greater than the width of the gripping portion in the second direction.

[0018] According to an embodiment of the present disclosure, the perforation lines and the strong adhesion portion can be arranged so as to be separated by a predetermined distance.

[0019] According to an embodiment of the present disclosure, the section separated by the predetermined distance can be formed as a non-adhesive region.

[0020] According to an embodiment of the present disclosure, the section separated by the predetermined distance can be formed as a weak adhesion portion.

[0021] According to an embodiment of the present disclosure, the outer peripheral edges of the perforation lines and the strong adhesion portion can be formed in contact with each other.

[0022] According to an embodiment of the present disclosure, the battery-attaching tape further includes a non-adhesive portion, and one or more non-adhesive portions can be provided at the ends of the weak adhesion portion.

[0023] According to one embodiment of the present disclosure, the strong adhesive portion may overlap, at least in part, with the fixing tape that is attached to the other side of the battery attachment tape.

[0024] According to one embodiment of the present disclosure, in a battery to which a battery adhesive tape including an adhesive portion is attached, the adhesive portion may include a weak adhesive portion, a strong adhesive portion having stronger adhesive force than the weak adhesive portion, and a perforation line perforated along the outer edge of the strong adhesive portion.

[0025] According to one embodiment of the present disclosure, a plurality of perforation lines may be arranged along the outer edge, with a predetermined distance between adjacent perforation lines.

[0026] According to one embodiment of the present disclosure, the default interval may be 0.4 mm.

[0027] According to one embodiment of the present disclosure, the strong adhesive portion may include grooves formed at positions corresponding to a predetermined interval between adjacent perforation lines.

[0028] According to one embodiment of the present disclosure, the adhesive portion further includes a gripping portion on its side surface, and the strong adhesive portion may overlap the gripping portion in a first direction and extend in a second direction perpendicular to the first direction.

[0029] According to one embodiment of the present disclosure, the extended length of the strong adhesive portion may be greater than or equal to the width of the gripping portion in the second direction.

[0030] According to one embodiment of the present disclosure, the strong adhesive portion may overlap, at least in part, with the fixing tape that is attached to the other side of the battery attachment tape.

[0031] <Detailed description of the invention> Preferred embodiments of this disclosure will now be described in detail based on the accompanying drawings. First, terms and words used in this specification and in the claims should not be interpreted in a manner limited to their ordinary and dictionary meanings, but rather in a manner consistent with the technical idea of ​​the present invention, in accordance with the principle that inventors may define the concepts of terms as appropriate to best describe their invention. Accordingly, it should be understood that the embodiments and configurations shown in the drawings described herein represent only a selection of preferred embodiments of the present invention and do not represent the entirety of the technical idea of ​​the present invention, and that there may be a variety of equivalents and modifications that can substitute for them at the time of filing this application.

[0032] Furthermore, as used herein, “comprise,” “comprising,” “include,” and “including” specify the presence of the shapes, figures, steps, actions, members, elements, and / or groups mentioned, and do not exclude the presence or addition of one or more other shapes, figures, actions, members, elements, and / or groups.

[0033] Furthermore, to aid in understanding the invention, the accompanying drawings may not be shown to actual scale, and the dimensions of some components may be exaggerated. Also, the same component will be assigned the same reference numeral in different embodiments.

[0034] The statement that two comparison objects are "identical" means that they are "substantially identical." Therefore, being substantially identical may include having deviations that are considered low in this industry, for example, deviations of 5% or less. Furthermore, the uniformity of a parameter within a given domain can mean uniformity in terms of the average.

[0035] While terms like "first," "second," etc., are used to describe various components, these components are not limited by these terms. These terms are merely used to distinguish one component from another, and unless otherwise stated, the first component can be the second component.

[0036] Throughout the specification, unless otherwise stated, each component may be singular or plural.

[0037] When we say that any component is placed "above (or below)" or "above (or below)" a component, it means not only that the component is placed in contact with the upper (or lower) surface of the component, but also that other components may be interposed between the component and any component placed above (or below) it.

[0038] Furthermore, when it is stated that one component is "connected," "bonded," or "linked" to another component, it must be understood that these components can be directly connected or linked to each other, but they can also be "interposed" between other components, or each component can be "connected," "bonded," or "linked" through other components. Also, when it is said that one part is electrically coupled to another part, this includes not only cases where they are directly connected, but also cases where they are connected with another element in between.

[0039] Throughout the specification, when we refer to "A and / or B," we mean A, B, or A and B unless otherwise specified. That is, "and / or" includes all combinations or any combination of the listed items. When we refer to "C through D," we mean C or greater and D or less, unless otherwise specified.

[0040] The terms used herein are for the purpose of describing the embodiments of this disclosure and are not intended to limit this disclosure.

[0041] Figure 1 is an exploded perspective view of a battery including a battery adhesive tape 100 according to one embodiment of the present disclosure.

[0042] Referring to Figure 1, a battery according to one embodiment of the present invention may include a battery cell 10, a battery adhesive tape 100, a fixing tape 20, and a battery fixing part 30. In one embodiment, the battery includes at least a battery cell 10 and a battery adhesive tape 100, and may include the above-mentioned configuration etc. in a stacking manner as shown in Figure 1. The battery adhesive tape 100 may be directly attached to the battery cell 10. Specifically, one side of the battery adhesive tape 100 may be attached to one side of the battery cell 10, one side of the fixing tape 20 may be attached to the other side of the battery adhesive tape 100, and one side of the battery fixing part 30 may be attached to the other side of the fixing tape 20. Here, the battery fixing part 30 may be a structure that is placed inside or outside a case or housing of an electronic device or the like.

[0043] Here, the battery adhesive tape 100 may have an adhesive portion with adhesive force formed on one surface that faces the battery cell 10. That is, the film-like battery adhesive tape 100 can be configured to have adhesive force on one surface and not on the opposite surface. Therefore, when the battery adhesive tape 100 is attached to the fixing tape 20, it can be attached depending on the adhesive force of the fixing tape 20. The fixing tape 20 can be configured to have a predetermined adhesive force on all surfaces, including the surface facing the battery adhesive tape 100 and the surface facing the battery fixing portion 30.

[0044] Figure 2 shows the adhesive surface of a battery attachment tape 100 according to one embodiment of the present disclosure.

[0045] Referring to Figure 2, the battery adhesive tape 100 may include an adhesive portion on one side, which is an adhesive surface that adheres to the surface of the battery cell 10. The adhesive portion includes a weak adhesive portion 110 and a strong adhesive portion 120 that has stronger adhesive force than the weak adhesive portion 110, and may include a perforation line 122 drilled along the outer edge of the strong adhesive portion 120. In addition, a gripping portion 130 may be included on the side of the adhesive portion.

[0046] In one embodiment, the weakly adhesive portion 110 can occupy at least half of the total adhesive area formed on the adhesive portion. The weakly adhesive portion 110 can include a plurality of dot-shaped adhesive areas of a predetermined size. As shown in Figure 2, the dot shape may be circular, but is not limited to this. For example, such a dot shape can be formed by forming a mask corresponding to the dot shape on the adhesive surface of the adhesive film.

[0047] The adhesive strength of the weakly bonded portion 110 may be weaker than the adhesive strength of the strongly bonded portion 120. Here, adhesive strength is the force generated over the same area and can be determined by the exposed area of ​​the adhesive material or by the type of adhesive material. Specifically, for the adhesive strength of the weakly bonded portion 110 to be weaker than that of the strongly bonded portion 120 means that, upon peeling, it has a higher adhesive strength over the same area within the bonded portion.

[0048] In one embodiment, the strong adhesive portion 120 can occupy at least a portion of the remaining area excluding the weak adhesive portion 110. The battery adhesive tape 100 may have multiple strong adhesive portions 120. Furthermore, multiple strong adhesive portions 120 may be arranged symmetrically with respect to the center of the adhesive portion. In one embodiment, as shown in Figure 2, if two strong adhesive portions 120 are provided, they may be arranged within the weak adhesive portion 110 symmetrically with respect to the center of the adhesive portion.

[0049] In one embodiment, the strong adhesive portion 120 may have perforation lines 122 formed on its peripheral edge, which may be configured so that the thin film is separated when the battery adhesive tape 100 is peeled off from the battery cell 10. Specifically, when the battery adhesive tape 100 is peeled off, the strong adhesive portion 120 has multiple perforation lines 122 arranged along its outer edge, so the sections where the perforation lines 122 are separated, i.e., the sections where the film is connected, are separated. Therefore, even after the peeling is complete from the battery, for example, the electronic device, the strong adhesive portion 120 may remain attached to the battery cell 10. On the other hand, when the battery adhesive tape 100 is peeled off, the tensile strength of the film is formed to be weaker than the adhesive strength of the strong adhesive portion 120, and can have a tensile strength greater than or equal to the adhesive strength of the weak adhesive portion, in order to ensure the separation of the film along the perforation lines 122. The detailed structure of the strong adhesive portion 120 and the perforation lines 122 will be described in detail with reference to Figures 5 to 7.

[0050] In one embodiment, the strong adhesive portion 120 may overlap with the gripping portion 130 located on the side of the adhesive portion in a first direction and extend in a second direction perpendicular to the first direction. In this disclosure, the first direction may be the X direction as shown in Figure 2, and the second direction may be the Y direction. That is, the width in the first direction may be relatively narrow, and the width in the second direction may be relatively long. Multiple strong adhesive portions 120 can be arranged symmetrically to minimize the separation of the battery due to distortion or dropping of the electronic device.

[0051] More specifically, since battery distortion occurs in the diagonal direction, it can occur along an axis connecting the edge of the adhesive part and the diagonally located edge, as shown in Figure 2. Therefore, the strong adhesive part 120 is positioned in a symmetrical manner, and the axis through which distortion occurs can extend over a length that crosses the strong adhesive part 120. As mentioned above, this design minimizes the separation of the battery due to distortion or dropping of the electronic device by allowing the strong adhesive part 120 to maintain its adhesive state in response to external forces and to transmit a more mitigated force to the surrounding weak adhesive part 110.

[0052] In one embodiment, the adhesive portion may include at least one non-adhesive portion 101. For example, as shown in Figure 2, the non-adhesive portion 101 may have at least one along the end of the adhesive portion. In the example in Figure 2, two non-adhesive portions 101 are formed on the upper end and two on the lower end, respectively, but the position of the non-adhesive portions 101 is not limited to this, and depending on the design, one to four non-adhesive portions 101 can be provided on the four edges.

[0053] More specifically, as shown in Figure 2, if the adhesive portion has a roughly rectangular shape, and the edges where the non-adhesive portion 101 may be located are referred to as the first edge to the fourth edge, then in one embodiment, the non-adhesive portion 101 can be formed on the first edge to the fourth edge, respectively. As shown in Figure 2, the first and second edges may be located on the left and right sides of the upper end of the adhesive portion, respectively, and the third and fourth edges may be located on the left and right sides of the lower end of the adhesive portion, respectively.

[0054] In one embodiment, the area of ​​the non-adhesive portion 101 may be 5% to 20% of the total area of ​​the adhesive portion. For example, the non-adhesive portion 101 can occupy approximately 13% of the total area of ​​the adhesive portion. However, it is not limited to this, and the non-adhesive portion can have a variety of areas as long as the adhesive portion can be attached to the battery cell 10. In one embodiment, it is desirable that the combined area of ​​the weakly adhesive portion 110 and the non-adhesive portion 101 be larger than the area of ​​the strongly adhesive portion 120, so that the user can easily remove the battery adhesive tape 100 from the battery cell 10.

[0055] In one embodiment, the non-adhesive portion 101 may include a boundary line of a c-cut 102 that separates the adhesive surface from the non-adhesive surface by at least diagonal lines. That is, the shape of the non-adhesive portion 101 may be a triangle, a polygon such as a trapezoid, or a semicircle. Here, the c-cut 102 may be a structure that can accommodate distortion that occurs mainly in the X or Y direction when the battery adhesive tape 100 is attached to the battery cell 10 by the adhesive portion. More specifically, when the battery cell 10 is affected by distortion, it can mean that a part of the adhesive portion separates, thereby preventing the generation of noise. More specifically, noise may repeatedly occur in the process of the adhesive between the adhesive portion of the battery adhesive tape 100 and the battery cell 10 coming off, re-adhering due to the adhesive force remaining in the adhesive portion, and then separating again. However, by providing the non-adhesive portion 101 on at least one edge of the adhesive portion of the battery adhesive tape 100, the generation of such noise can be minimized.

[0056] In one embodiment, the battery adhesive tape 100 may include a gripping portion 130 extending in one direction from the adhesive portion. At least a portion of the gripping portion 130 may have adhesive force. For example, at least a portion of the area of ​​the adhesive gripping portion 130 may be attached to one or more faces of the hexahedral battery cell 10. Here, the adhesive area between the gripping portion 130 and the battery cell 10 may be selected within the range of adhesive strength of the weak adhesive portion 110 and the strong adhesive portion 120.

[0057] On the other hand, in one embodiment, the fixing tape 20 may be attached to another surface of the battery attachment tape 100, that is, a surface on which no adhesive portion is formed. The fixing tape 20 may overlap at least a portion with the strong adhesive portion 120 of the battery attachment tape 100. That is, the fixing tape 20 may be positioned such that a portion of it overlaps with the strong adhesive portion 120, and the remaining portion does not overlap.

[0058] Figure 3 shows the adhesive surface of a battery attachment tape 100 according to one embodiment of the present disclosure.

[0059] The battery attachment tape shown in Figure 3 has the same structure as the example in Figure 2, except that the strong adhesive portion 120 is formed without overlapping with the weak adhesive portion 110, so redundant explanations will be omitted.

[0060] As shown in Figure 3, according to one embodiment, a weakly adhesive portion 110 can be formed only in the area other than the area where the strongly adhesive portion 120 is formed. As mentioned above, the weakly adhesive portion 110 may be an adhesive area consisting of multiple dots, and may be formed by forming a mask corresponding to the dot shape on the adhesive surface of the adhesive film. In contrast, the strongly adhesive portion 120 may use the adhesive surface of the adhesive film as is.

[0061] The strong adhesive portion 120 may overlap with the gripping portion 130 located on the side of the adhesive portion in a first direction and extend in a second direction perpendicular to the first direction. That is, the width in the first direction may be relatively narrow, and the width in the second direction may be relatively long. Also, the vertical level of the upper surface of the strong adhesive portion 120 and the vertical level of the upper surface of the weak adhesive portion 110 may be the same.

[0062] Figure 4 is a perspective view showing a battery adhesive tape 100 according to one embodiment of the present disclosure attached to a battery cell 10.

[0063] Referring to Figure 4, the gripping portion 130 can be peeled off by being pulled in a first direction (for example, the X direction). However, even if it is not pulled perfectly parallel to the first direction, but in a corresponding direction (De), the film can be separated along the perforation line 122, and the strongly adhesive portion 120 can be separated from the adhesive portion (i.e., the weakly adhesive portion 110).

[0064] More specifically, when the battery adhesive tape 100 is peeled off, in addition to the forces in the first and second directions, a force in a third direction (Z direction) may also act. Here, the force pulling in the third direction causes the weak adhesive portion 110 to separate from the battery cell 10, but the strong adhesive portion 120 adheres relatively strongly to the battery cell 10 and may remain adhered to the battery cell 10 while separating from the adhesive portion along the perforation line 122. This is due not only to the strong adhesive force of the adhesive portion, but also to the structure designed to separate the film between the perforation line 122 extending along the outer edge of the strong adhesive portion 120.

[0065] Figure 5 shows a perforation line 122 extending along a strong adhesive portion 120 according to one embodiment of the present disclosure. Figure 6 is an enlarged view of area A in Figure 5, showing a state in which there is a space between the strong adhesive portion 120 and the perforation line 122 according to one embodiment of the present disclosure.

[0066] Referring to Figures 5 and 6, the strong adhesive portion 120 can have a rectangular shape that extends long in one direction, and a perforation line 122 can be formed extending along the outer edge of the strong adhesive portion 120. The perforation line 122 is in the form of a through-hole that penetrates the film and may be in the form of an elongated hole extending in the direction of extension. There may be multiple perforation lines 122. For example, adjacent perforation lines 122 on a path in which multiple perforation lines 122 are arranged are separated by a predetermined interval (g1). For example, the predetermined interval (g1) may be 0.4 mm. The film in the separated section corresponding to the predetermined interval (g1) may be a non-adhesive area or a weakly adhesive area that does not contain adhesive material.

[0067] In one embodiment, the strong adhesive portion 120 may include grooves 125 formed at positions corresponding to a predetermined distance (g1) between adjacent perforation lines 122. In another embodiment, the strong adhesive portion 120 and the perforation lines 122 may include a separation space 123 separated by a predetermined distance. The separation space 123 may further refer to a space on the adhesive film formed by the grooves 125 of the strong adhesive portion 120. The separation space 123 may be a non-adhesive region where no adhesive material is present. Alternatively, the separation space 123 may be formed in a weak adhesive portion.

[0068] When the battery adhesive tape 100 is peeled off, the film in the separation space 123 and / or the section corresponding to the gap between adjacent perforation lines are separated, while the strong adhesive portion 120 may remain on the battery cell 10. Alternatively, the strong adhesive portion 120 may be separated by the groove 125 formed in the strong adhesive portion 120, and only a portion of the strong adhesive portion 120 may remain on the battery cell 10.

[0069] Figure 7 is an enlarged view of area A in Figure 5, showing a state in which there is no separation space between the strong adhesive portion 120 and the perforation line 122 according to one embodiment of the present disclosure.

[0070] Referring to Figure 7, since there is no separation space between the perforation line 122 and the strong adhesive portion 120 other than the separation space 123a in the region corresponding to the groove 125 of the strong adhesive portion 120, the outer edges of the perforation line 122 and the strong adhesive portion 120 can be formed in contact.

[0071] At this time, when the battery adhesive tape is peeled off, the film between the perforation lines 122 is separated, leaving only the strong adhesive portion 120 attached to the battery cell 10, while the weak adhesive portion 110 peels off, allowing the battery adhesive tape 100 to be removed. Alternatively, the strong adhesive portion 120 may be separated by the groove 125 formed in the strong adhesive portion 120, leaving only a portion of the strong adhesive portion 120 attached to the battery cell 10.

[0072] Figure 8 shows the region where the fixing tape 20 and the strong adhesive portion 120 overlap according to one embodiment of the present disclosure.

[0073] Referring to Figure 8, as described above in Figure 1, the battery attachment tapes 100 can be attached to each other by the adhesive force of the fixing tapes 20. Since the adhesive area of ​​the battery attachment tape 100 is formed on only one of its two surfaces, the adhesive surface (the surface on which the weak adhesive portion 110 and the strong adhesive portion 120 are formed) can be attached to the battery cell 10, and the other surface can be attached to the fixing tape 20.

[0074] In this case, the fixing tape 20 is not a square shape, but can have various shapes depending on the design, but as one example, it may be similar in shape to the embodiment shown in Figure 8. Of course, it is not limited to this, and can be selectively determined by a designer skilled in the art. In this example, the fixing tape 20 may overlap with the weak adhesive portion 110 in some area and with the strong adhesive portion 120 in some area. For example, in a pair of strong adhesive portions 120 arranged in a first direction, an overlapping region (S2) that overlaps with the fixing tape 20 may be formed in a part of the strong adhesive portion 120, and a non-overlapping region (S1) that does not overlap with the fixing tape 20 may be formed in the remaining part. Of course, even in the case of overlap, the fixing tape is attached to the surface of the battery attachment tape 100 that does not have adhesive strength, and is not directly attached to the strong adhesive portion 120, but may be in contact with the film.

[0075] The adhesive strength of the fixing tape 20 can be weaker than that of the strong adhesive portion 120. When the battery attachment tape 100 is peeled off from the battery cell 10, the fixing tape can also be removed together with it during the peeling process. The fixing tape can also be attached to the battery fixing portion 30 and removed together with the battery fixing portion 30 when the battery fixing portion 30 is removed. However, in all cases, the adhesive strength formed on the overlapping area of ​​the fixing tape 20 and the strong adhesive portion 120 should not be stronger than that of the strong adhesive portion 120. Since the adhesive material of the fixing tape and the adhesive material of the strong adhesive portion 120 are attached to both sides with the film as the boundary, it is desirable that the adhesive material directly or indirectly attached to the strong adhesive portion 120 has a weaker adhesive strength than that of the strong adhesive portion 120, so that the strong adhesive portion 120 remains attached to the battery cell 10 after the battery attachment tape 100 is peeled off. That is, in the fixing tape 20, the adhesive strength in at least the area corresponding to the overlapping region (S2) can be formed to be weaker than the adhesive strength of the strong adhesive portion 120.

[0076] Figure 9 shows the width l1 of the gripping portion 130 and the width l2 of the strong adhesive portion in a second direction (for example, the Y direction) according to one embodiment of the present disclosure.

[0077] Referring to Figure 9, in one embodiment, the width (i.e., extension length) l2 of the strong adhesive portion 120 in the second direction may be greater than or equal to the width l1 of the gripping portion in the second direction. Here, the tensile strength of the film can be closer to the adhesive force of the weak adhesive portion 110 than to the adhesive force of the strong adhesive portion 120. For example, the tensile strength of the film may be formed at the same level as the adhesive force of the weak adhesive portion 110.

[0078] Furthermore, the strong adhesive portion 120 extending in the second direction (Y direction) may extend as far as it can cross the axis through which distortion occurs in the diagonal direction. However, this arrangement can be satisfied not only by the length extending in the second direction but also by the position in the first direction. For example, it may be positioned towards the center so as to cross the diagonal direction.

[0079] In order to satisfy all of the aforementioned conditions, a pair of strong adhesive portions 120 are provided at positions 1 / 3 and 2 / 3 of the way from the left end of the adhesive portion in the first direction, and each strong adhesive portion 120 may extend for a length corresponding to 90% of the width of the adhesive portion with respect to the second direction. However, the position and size of the strong adhesive portions 120 can be varied in various ways, but are not limited to this.

[0080] Although the present invention has been described above with reference to limited embodiments and drawings, it is not limited thereto, and of course, a wide range of modifications and variations are possible within the equivalent scope of the technical concept and claims of the present invention by persons with ordinary skill in the art to which the present invention pertains. [Explanation of Symbols]

[0081] 10 battery cells 20 Fixing Tapes 30 Battery fixing part 100 Battery Adhesive Tape 101 Non-adhesive area 102 c cut 110 Weakly bonded area 120 Strong adhesive part 122 Perforation Line 123, 123a Separate space 125 Groove 130 Gripping part l1 Width of the gripping portion in the second direction l2 Width of the strong adhesive area in the second direction A Enlarged Area g1 Default interval S1 Non-overlapping region S2 Overlap Region

Claims

1. In a battery adhesive tape with an adhesive portion formed on one surface, The aforementioned adhesive portion is Weakly bonded area, A strong adhesive portion having stronger adhesive strength than the weak adhesive portion, A battery adhesive tape comprising a perforation line drilled along the outer edge of the aforementioned strong adhesive portion.

2. The battery adhesive tape according to claim 1, wherein a plurality of perforations are arranged along the outer edge, and adjacent perforations are spaced apart by a predetermined interval.

3. The battery adhesive tape according to claim 2, wherein the predetermined interval is 0.4 mm.

4. The battery adhesive tape according to claim 2, wherein the strong adhesive portion includes a groove formed at a position corresponding to the predetermined interval between adjacent perforation lines.

5. The aforementioned strong adhesive portion has multiple parts, The battery adhesive tape according to claim 1, wherein the plurality of strong adhesive portions are arranged symmetrically with respect to the center of the adhesive portion.

6. The adhesive portion further includes a gripping portion on its side surface, The battery adhesive tape according to claim 1, wherein the strong adhesive portion overlaps with the gripping portion in a first direction and extends in a second direction perpendicular to the first direction.

7. The battery adhesive tape according to claim 6, wherein the extended length of the strong adhesive portion is greater than or equal to the width of the gripping portion in the second direction.

8. The battery adhesive tape according to claim 1, wherein the perforation line and the strong adhesive portion are arranged to be separated by a predetermined distance.

9. The battery attachment tape according to claim 8, wherein the section separated by the predetermined distance is formed as a non-adhesive region.

10. The battery attachment tape according to claim 8, wherein the section separated by the predetermined distance is formed by a weakly adhesive portion.

11. The battery adhesive tape according to claim 1, wherein the perforation line and the outer peripheral edge of the strong adhesive portion are formed in contact with each other.

12. The aforementioned battery attachment tape further includes a non-adhesive portion, The battery adhesive tape according to claim 1, wherein one or more non-adhesive portions are provided at the ends of the weakly adhesive portions.

13. The battery adhesive tape according to claim 1, wherein the strong adhesive portion overlaps, at least in part, with a fixing tape that is attached to the other side of the battery adhesive tape.

14. In a battery to which battery adhesive tape including an adhesive portion is attached, The aforementioned adhesive portion is Weakly bonded area, A strong adhesive portion having stronger adhesive strength than the weak adhesive portion, A battery, including a perforation line drilled along the outer edge of the strong adhesive portion.

15. The battery according to claim 14, wherein a plurality of the perforation lines are arranged along the outer edge, and adjacent perforation lines are spaced apart by a predetermined interval.

16. The battery according to claim 15, wherein the predetermined interval is 0.4 mm.

17. The battery according to claim 15, wherein the strong adhesive portion includes a groove formed at a position corresponding to the predetermined interval between adjacent perforation lines.

18. The adhesive portion further includes a gripping portion on its side surface, The battery according to claim 14, wherein the strong adhesive portion overlaps with the gripping portion in a first direction and extends in a second direction perpendicular to the first direction.

19. The battery according to claim 18, wherein the extended length of the strong adhesive portion is greater than or equal to the width of the gripping portion in the second direction.

20. The battery according to claim 14, wherein the strong adhesive portion overlaps at least a portion with the fixing tape attached to the other side of the battery attachment tape.

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