Battery tape and battery taping method

Abstract

This invention provides battery tape and a battery taping method. [Solution] The battery tape includes a first member positioned on a first surface of the battery, and a second member extending from the side of the first member to cover the side of the battery and adhering to a second surface of the battery facing the first surface, wherein the first member can undergo anisotropic thermal shrinkage to contact the first surface of the battery, and the second member can undergo anisotropic thermal shrinkage to contact the side of the battery.

Description

Technical Field

[0001] The present invention relates to a battery tape and a battery taping method.

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 driving and power storage batteries in hybrid vehicles and electric vehicles. Such secondary batteries include an electrode assembly composed of a positive electrode and a negative electrode, a case that houses the electrode assembly, and electrode terminals connected to the electrode assembly.

[0003] Particularly, when a battery is mounted on a portable small electronic device or the like, it can be adhered together with a battery tape. The battery tape must prevent the battery from floating within the electronic device and prevent the battery from being separated when the electronic device falls.

[0004] The attachment site of the battery tape can be diverse, but depending on the attachment site of the battery tape, the battery may float when the electronic device falls, which causes a problem of deteriorating the quality of the electronic device.

[0005] The above-mentioned 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 include information that does not constitute the prior art.

Prior Art Documents

Patent Documents

[0006]

Patent Document 1

Summary of the Invention

[0007] This disclosure provides a battery tape and a battery taping method to solve the aforementioned problems.

[0008] 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]

[0009] A battery tape according to one embodiment of the present disclosure for solving the aforementioned technical problems includes a first member disposed on a first surface of a battery and a second member extending from the side of the first member, covering the side of the battery and adhering to a second surface of the battery facing the first surface, wherein the first member and the second member may be anisotropic heat-shrinkable films.

[0010] A battery taping method according to one embodiment of the present disclosure for solving the aforementioned technical problems includes the steps of: providing a battery tape including a first member and a second member; placing the first member on a first surface of a battery; bending the second member along the side of the battery and adhering at least a portion of the second member to the second surface of the battery; and heat-treating the first member and the second member to shrink them.

[0011] <Summary of the Invention> According to one embodiment of the present disclosure, the first member includes a first base portion and a first coating layer laminated on both sides of the first base portion, wherein the first base portion may be an anisotropic heat-shrinkable material.

[0012] According to one embodiment of the present disclosure, the first member may further include a first printed layer laminated on at least one surface of the first coating layer.

[0013] According to one embodiment of the present disclosure, the second member includes a second base portion and a second coating layer laminated on both sides of the second base portion, wherein the second base portion may be an anisotropic heat-shrinkable material.

[0014] According to one embodiment of the present disclosure, the second member may further include a second printed layer laminated on at least one surface of the second coating layer.

[0015] According to one embodiment of the present disclosure, the second member further includes an adhesive layer formed on at least one surface of the second coating layer, the adhesive layer allowing the second member to adhere to the second surface.

[0016] According to one embodiment of the present disclosure, when heat is supplied to a first member while it is positioned at a distance from the first surface of the battery, it can contract in a first direction and a second direction perpendicular to the first direction to come into contact with the first surface of the battery.

[0017] According to one embodiment of the present disclosure, the second member can be bent along the side of the battery so that at least a portion of it adheres to the second surface of the battery.

[0018] According to one embodiment of the present disclosure, when heat is supplied, the second member may contract in a first direction and a second direction perpendicular to the first direction to come into contact with the side of the battery.

[0019] According to one embodiment of the present disclosure, a protective circuit module is attached to one side of the battery, and the second member can adhere to at least a portion of the second surface of the battery while covering the protective circuit module.

[0020] According to one embodiment of the present disclosure, the first member and the second member may be made of PC (polycarbonate), PP (polypropylene), PE (polyethylene), or PET (polyethylene terephthalate).

[0021] According to an embodiment of the present disclosure, the first member and the second member can be heat-shrunk in a temperature range of 60°C to 70°C.

[0022] According to an embodiment of the present disclosure, the first member and the second member are formed with a thickness of 20 μm to 50 μm, and when heat is supplied, they can shrink by the same amount in the first direction and the second direction perpendicular to the first direction.

[0023] According to an embodiment of the present disclosure, four second members extend from the four side portions of the first member respectively, and each second member can be adhered to the second surface of the battery in a state where they do not contact each other.

[0024] According to an embodiment of the present disclosure, in the step of adhering the second member, the second member can be adhered to the second surface of the battery so as not to contact each other.

[0025] According to an embodiment of the present disclosure, the step of heat-treating and shrinking may include a step in which when heat is supplied while the first member is disposed apart from the first surface of the battery, the first member shrinks in the first direction and the second direction perpendicular to the first direction and contacts the first surface of the battery.

[0026] According to an embodiment of the present disclosure, the step of heat-treating and shrinking may include a step in which when heat is supplied while the second member is bent along the side surface of the battery and at least a part of it is adhered to the second surface of the battery, the second member shrinks in the first direction and the second direction perpendicular to the first direction and contacts the side surface of the battery.

[0027] According to an embodiment of the present disclosure, the step of heat-treating and shrinking can be performed in a temperature range of 60°C to 70°C.

[0028] According to one embodiment of the present disclosure, the step of heat treatment to shrink the first member and the second member may include the step of forming them with a thickness of 20 μm to 50 μm and, when heat is supplied, shrinking by the same amount in a first direction and a second direction perpendicular to the first direction. [Effects of the Invention]

[0029] According to various embodiments of this disclosure, the first and second members, which are anisotropic heat-shrinkable films, shrink under heat when heat is supplied, thereby eliminating the gap between the battery and the battery tape, and thus preventing the battery from moving when the electronic device is dropped.

[0030] According to various embodiments of this disclosure, the contact of the battery tape with the first surface of the battery due to thermal shrinkage can improve wrinkles that may occur in the battery tape.

[0031] However, the effects obtained by the present invention are not limited to those described above, and other technical effects not mentioned should be clearly understood by those skilled in the art from the description of the invention below. [Brief explanation of the drawing]

[0032] 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, serve to further enhance understanding of the technical concept of the present invention. Therefore, the present invention should not be interpreted as being limited solely to the matters described in such drawings. [Figure 1] This is a perspective view showing the state of a battery tape according to one embodiment of the present invention before the battery is placed on it. [Figure 2] Figure 1 shows the state in which the first surface of the battery is placed on the battery tape according to one embodiment of the present invention. [Figure 3] This is a plan view showing a battery to which a battery tape according to one embodiment of the present disclosure is attached. [Figure 4]This is a bottom view showing a battery tape according to one embodiment of the present disclosure. [Figure 5] This is a cross-sectional view of the battery tape along line AA in Figure 4. [Figure 6a] This is a side view from the X-axis direction of a battery to which a battery tape according to one embodiment of the present disclosure is attached before heat shrinkage, with the second member omitted. [Figure 6b] This is a side view from the X-axis direction of a battery to which a battery tape according to one embodiment of the present disclosure has been attached after heat shrinkage, with the second member omitted. [Figure 7a] This is a side view from the Y-axis direction of a battery to which a battery tape according to one embodiment of the present disclosure is attached before heat shrinkage, with the second member omitted. [Figure 7b] This is a side view from the Y-axis direction of a battery to which a battery tape according to one embodiment of the present disclosure has been attached after heat shrinkage, with the second member omitted. [Figure 8] This flowchart shows an example of a battery taping method according to one embodiment of the present disclosure. [Modes for carrying out the invention]

[0033] <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.

[0034] 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. Also, when describing embodiments of the present invention, “may be,” and “may include,” “one or more embodiments of the present invention.”

[0035] 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 reference numeral is assigned to the same component in different embodiments.

[0036] 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.

[0037] 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.

[0038] Throughout the specification, unless otherwise stated, each component may be singular or plural.

[0039] 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 top (or bottom) surface of the component, but also that other components may be interposed between the component and any component placed above (or below) it.

[0040] Furthermore, when it is stated that one component is "linked," "joined," or "connected" to another component, it must be understood that these components can be directly linked or connected to one another, but that other components can also "intersect" between them, or that components can be "linked," "joined," or "connected" through other components.

[0041] Furthermore, when we say that one part is electrically coupled to another part, this includes not only cases where they are directly connected, but also cases where other elements are in between to form the connection.

[0042] 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.

[0043] The terms used herein are for the purpose of describing the embodiments of this disclosure and are not intended to limit this disclosure.

[0044] Figure 1 is a perspective view showing the state before the battery is placed on the battery tape according to one embodiment of the present invention; Figure 2 is a view showing the state in which the first surface of the battery is placed on the battery tape according to one embodiment of the present invention; Figure 3 is a plan view showing the battery to which the battery tape according to one embodiment of the present disclosure is attached; and Figure 4 is a bottom view showing the battery tape according to one embodiment of the present disclosure.

[0045] A battery tape according to one embodiment of the present invention includes a first member 100 and a second member 200, the first member 100 and the second member 200 being anisotropic heat-shrinkable films. The first member 100 may be positioned on a first surface 11 of the battery 10. For example, the first member 100 may be formed in a rectangular shape. The first member 100 may be formed according to the shape and size of the first surface 11 of the battery 10.

[0046] In this case, the first surface 11 of the battery 10 may be, but is not limited to, the lower surface of the battery 10 shown in Figure 6a. The battery 10 can be placed on the first member 100 with its lower surface facing the first member 100.

[0047] The second member 200 can extend from the side of the first member 100 to cover the side 13 of the battery 10. The second member 200 can be bent along the side 13 of the battery 10 so that at least a portion of it adheres to the second surface 12 of the battery 10. The second member 200 can extend from four sides of the first member 100 to cover the four side 13 of the battery 10. The second member 200 can adhere to the second surface 12 of the battery 10 that is opposite the first surface 11 of the battery 10.

[0048] The first surface 11 of the battery 10 faces the second surface 12, and the side surface 13 of the battery 10 may be a surface connecting the first surface 11 and the second surface 12. Since the second member 200 has adhesive properties, an adhesive can be applied to the second member 200.

[0049] Any commonly used adhesive may be used. The adhesive may be an acrylic adhesive. The acrylic adhesive can be selected from PMMA (polymethyl methacrylate), PEMA (polyethyl methacrylate), or PBMA (polybutyl methacrylate).

[0050] The second member 200 may have an adhesive applied to at least a portion of it and adhere to the second surface 12 of the battery 10. The second member 200 may adhere to at least a portion of the second surface 12 of the battery 10. In this case, the second surface 12 of the battery 10 may be, but is not limited to, the upper surface of the battery 10.

[0051] The second member 200 extends from the side of the first member 100, and the second member 200 is attached to at least a portion of the battery 10, which can make the bond between the battery tape and the battery 10 stronger.

[0052] The second member 200 can have a variety of shapes. Four second members 200 are formed, each extending from one of the four sides of the first member 100, and each of the second members 200 can be attached to the second surface 12 of the battery 10 without being in contact with one another. For example, the second member 200 may have multiple rounded edges and become narrower in width as it moves further away from the sides of the first member 100. However, the shape of the second member 200 is not limited to this.

[0053] The second member 200 is bent toward the side 13 of the battery 10. For example, as shown in Figure 2, when the battery 10 is placed on the first member 100, and the four second members 200 are bent, the second members 200 can be made so that they do not touch each other, as shown in Figure 3. When the second members 200 are bent with the battery 10 placed on the first member 100, the second members 200 can adhere to the second surface 12 while covering the side 13 of the battery 10. Adhesive does not need to be applied to the portion of the second member 200 that covers the side 13 of the battery 10.

[0054] For example, the side surface 13 of the battery 10 may be connected to a first surface 11 and a second surface 12. The first surface 11 may be the bottom surface of the battery 10, and the second surface 12 may be the top surface of the battery 10. If the battery 10 is a hexahedron, the side surface 13 of the battery 10 may include a third surface, a fourth surface, a fifth surface, and a sixth surface connected to the first surface 11 and the second surface 12. The third surface may face the fifth surface, and the fourth surface may face the sixth surface. In this case, the second member 200 may adhere to a part of the second surface 12 while covering the third surface, the fourth surface, the fifth surface, and the sixth surface of the battery 10.

[0055] The first member 100 and the second member 200 may be anisotropic heat-shrinkable films. The second member 200 may be attached to at least a portion of the second surface 12 of the battery 10, and the first member 100 may be positioned at a distance from the first surface 11 of the battery 10. When heat is supplied while the first member 100 is positioned at a distance from the first surface 11 of the battery 10, it may shrink in a first direction D1 and a second direction D2 perpendicular to the first direction D1 to come into contact with the first surface 11 of the battery 10.

[0056] For example, the first direction D1 can mean a direction inclined by 45° with respect to the boundary line between the first member 100 and the second member 200. The second direction D2 can mean a direction perpendicular to the first direction D1 and inclined by 45° with respect to the boundary line between the first member 100 and the second member 200. Alternatively, the first direction D1 can mean a direction inclined by 90° with respect to the boundary line between the first member 100 and the second member 200. The second direction D2 can mean a direction perpendicular to the first direction D1 and parallel or perpendicular to the boundary line between the first member 100 and the second member 200. The first direction D1 and the second direction D2 are not limited to these, and can be varied in many ways as long as there are two mutually orthogonal directions. When heat above a predetermined temperature is supplied to the second member 200, it may contract in the first direction D1 and the second direction D2 perpendicular to the first direction D1, and come into contact with the side surface 13 of the battery 10.

[0057] Before heat is supplied, the first member 100 is positioned at a distance from the first surface 11 of the battery 10, and a gap may exist between the first member 100 and the first surface 11 of the battery 10. When heat is supplied in this state, the first member 100 contracts in the first direction D1 and the second direction D2, eliminating the gap and allowing it to come into contact with the first surface 11 of the battery 10. Therefore, wrinkles that may occur due to the gap between the first member 100 and the first surface 11 of the battery 10 can be improved, and the movement of the battery 10 can be prevented when the electronic device with the battery 10 is dropped.

[0058] Before heat is supplied, the second member 200 is positioned so that a portion of it is in contact with the second surface 12 of the battery 10 and away from the side surface 13 of the battery 10, and a gap may exist between the second member 200 and the side surface 13 of the battery 10. When heat is supplied in this state, the second member 200 contracts in the first direction D1 and the second direction D2, eliminating the gap and allowing it to come into contact with the side surface 13 of the battery 10. Therefore, wrinkles that may occur due to the gap between the second member 200 and the side surface 13 of the battery 10 can be improved, and the movement of the battery 10 when the electronic device is dropped can be prevented.

[0059] The first member 100 and the second member 200 may include PC (polycarbonate), PP (polypropylene), PE (polyethylene), or PET (polyethylene terephthalate). The material of the first member 100 and the second member 200 can be any material that exhibits anisotropic heat shrinkage. For example, the first member 100 and the second member 200 can be heat-shrunk in a temperature range of 60°C to 70°C. Alternatively, the first member 100 and the second member 200 can be heat-shrunk in a temperature range of 62°C to 68°C. Alternatively, the first member 100 and the second member 200 can be heat-shrunk in a temperature range of 64°C to 66°C.

[0060] For example, the first member 100 and the second member 200 may be films that do not shrink at room temperature or below 60°C, but can shrink tens to hundreds of times more than a typical PEF film when a small amount of heat is supplied. The shrinkage principle of the first member 100 and the second member 200 is that residual stress is generated by stretching a group of polymers having a chain length above a certain level, and when a certain amount of heat is supplied while the material has residual stress, it can shrink in order to relieve the residual stress.

[0061] According to one embodiment, the first member 100 and the second member 200 may be formed with a thickness of 20 μm to 50 μm. Alternatively, the first member 100 and the second member 200 may be formed with a thickness of 25 μm to 40 μm. Alternatively, the first member 100 and the second member 200 may be formed with a thickness of 30 μm to 35 μm. When heat above a predetermined temperature is supplied to the first member 100 and the second member 200, they may shrink by the same amount in a first direction D1 and a second direction D2 perpendicular to the first direction D1.

[0062] As a result, the gap between the first component 100 and the first surface 11 of the battery 10, and the gap between the second component 200 and the side surface 13 of the battery 10 are uniformly filled, thereby preventing the battery 10 from moving when dropped. Furthermore, since no additional subsequent process is required to remove the gap between the battery and the battery tape, the manufacturing process can be simplified.

[0063] In one embodiment, a protection circuit module 20 is mounted on one side surface 13 of the battery 10, and the second member 200 can adhere to at least a portion of the second surface 12 of the battery 10 while covering the protection circuit module 20. The protection circuit module (PCM) can be connected to the battery 10 by welding or soldering, for example, via a conductive nickel plate. The protection circuit module 20 can be connected to the leads of the battery 10 by spot welding or soldering.

[0064] The protection circuit module 20, by being electrically connected to the battery 10, can prevent overheating and explosion that may occur due to overcharging, over-discharging, or overcurrent of the battery 10. The protection circuit module 20 may include safety elements consisting of passive elements such as resistors and capacitors, active elements such as field transistors, or protection circuit elements in which integrated circuits can be selectively formed.

[0065] The protection circuit module 20 may be located on the side 13 of the battery 10. The protection circuit module 20 may include a flexible printed circuit board. The flexible printed circuit board may have a bendable shape. The protection circuit module 20 may include a connector on one side of a pull-out section that extends from one side, for connection to an external device. The protection circuit module 20 may be connected to an external device via the connector. The protection circuit module 20 can transmit electrical energy stored in the battery 10 to an external device, or receive control signals from an external device to control the operation of the battery 10.

[0066] With the protection circuit module 20 in contact with one side surface 13 of the battery 10, the second member 200 can cover the side surface 13 of the battery 10 including the protection circuit module 20. In this state, when heat is supplied to the second member 200, the second member 200 can shrink due to anisotropic thermal contraction.

[0067] When the second component 200 is thermally shrunk, the gap on the side 13 of the battery 10 is eliminated, allowing the second component 200 to contact one side of the protection circuit module 20. Therefore, the protection circuit module 20 can maintain a stable mounting position on the side 13 of the battery 10.

[0068] Figure 5 is a cross-sectional view of the battery tape along line AA in Figure 4.

[0069] Referring to Figure 5, the first member 100 may include a first base portion 110 and a first coating layer 120 laminated on both sides of the first base portion 110. The first base portion 110 may be an anisotropic heat-shrinkable material. The first member 100 may further include a first printed layer 130 laminated on at least one surface of the first coating layer 120.

[0070] The second member 200 may include a second base portion 210 and a second coating layer 220 laminated on both sides of the second base portion 210. The second base portion 210 may be an anisotropic heat-shrinkable material. The second member 200 may further include a second printed layer 230 laminated on at least one surface of the second coating layer 220.

[0071] Furthermore, the second member 200 may further include an adhesive layer 240 formed on at least one surface of the second coating layer 220. The adhesive layer 240 allows the second member 200 to adhere to the second surface 12 of the battery 10. The adhesive layer 240 may be formed only on the portion of the second member 200 that is bent along the side surface of the battery 10 and comes into contact with the second surface 12. This allows the side surface of the battery 10 to be positioned away from the first surface 11 without coming into contact with it, while the second member 200 is adhered to the second surface 12 of the battery 10. For example, the first coating layer 120 and the second coating layer 220 may be formed with a low-temperature primer coating. As an example, the first coating layer 120 and the second coating layer 220 may be formed in a temperature range of 40°C to 50°C. Alternatively, the first coating layer 120 and the second coating layer 220 may be formed in a temperature range of 42°C to 48°C. Alternatively, the first coating layer 120 and the second coating layer 220 may be formed in a temperature range of 44°C to 46°C.

[0072] For example, the first printed layer 130 and the second printed layer 230 may be formed by color printing and UV drying. The first printed layer 130 may be formed on a part of the surface of the first member 100. The second printed layer 230 may be formed on a part of the surface of the second member 200.

[0073] The adhesive layer 240 may be formed on at least one surface of the second coating layer 220. The adhesive layer 240 may be formed on a portion of the second coating layer 220 so that the second member 200 adheres to the second surface 12 of the battery 10.

[0074] The adhesive layer 240 may be made from a commonly used adhesive. The adhesive layer 240 may be formed by applying an acrylic adhesive to the second coating layer 220. The acrylic adhesive can be selected from PMMA (poly methyl methacrylate), PEMA (poly ethyl methacrylate), or PBMA (poly butyl methacrylate).

[0075] The adhesive layer 240 can be coated onto the second coating layer 220 by various known methods to achieve various thicknesses. For example, the adhesive layer 240 can be coated to a thickness of 2% to 16% of the total thickness of the second member 200. Alternatively, the adhesive layer 240 can be coated to a thickness of 4% to 14% of the total thickness of the second member 200. Alternatively, the adhesive layer 240 can be coated to a thickness of 6% to 12% of the total thickness of the second member 200. In one embodiment, the adhesive layer 240 can be formed by a thermosetting method or a UV curing method.

[0076] The adhesive layer 240 may be formed on a portion of the second coating layer 220. The adhesive layer 240 may be formed only on the portion of the second coating layer 220 that comes into contact with the second surface 12 when the second member 200 is bent along the side of the battery 10.

[0077] Figure 6a is a side view from the X-axis direction of a battery to which a battery tape according to one embodiment of the present disclosure is attached before heat shrinkage, with the second member omitted. Figure 6b is a side view from the X-axis direction of a battery to which a battery tape according to one embodiment of the present disclosure is attached after heat shrinkage, with the second member omitted. Figure 7a is a side view from the Y-axis direction of a battery to which a battery tape according to one embodiment of the present disclosure is attached before heat shrinkage, with the second member omitted. Figure 7b is a side view from the Y-axis direction of a battery to which a battery tape according to one embodiment of the present disclosure is attached after heat shrinkage, with the second member omitted.

[0078] Referring to Figures 6a to 7b, the battery tape, including the first member 100 and the second member 200, can eliminate the gap between the battery 10 and the battery tape through anisotropic thermal shrinkage.

[0079] As shown in Figures 6a and 7a, with the first member 100 positioned on the first surface 11 of the battery 10 and the second member 200 adhering to the second surface 12 of the battery 10, a gap may be formed between the first member 100 and the first surface 11 of the battery 10 before heat shrinkage. Also, a gap may be formed between the second member 200 and the side surface 13 of the battery 10 before heat shrinkage.

[0080] The gap between the first member 100 and the first surface 11 of the battery 10, and the gap between the second member 200 and the side surface 13 of the battery 10, can cause the battery 10 to separate from the electronic device case or to shift position within the electronic device case when the electronic device is dropped. Therefore, the battery tape according to one embodiment of the present invention can fundamentally solve the problem of the battery 10 moving when the electronic device is dropped by filling these gaps with the first member 100 and the second member 200 made of anisotropic heat-shrinkable material.

[0081] When heat is supplied to the first member 100 and the second member 200, as shown in Figures 6b and 7b, the first member 100 and the second member 200 undergo anisotropic thermal shrinkage, filling the gap between the first member 100 and the first surface 11 of the battery 10, and the gap between the second member 200 and the side surface 13 of the battery 10. Before the thermal shrinkage process, the second member 200 can be bent along the side surface of the battery 10 so that it adheres only to the portion that contacts the second surface 12. As a result, with the second member 200 adhering to the second surface 12 of the battery 10, a gap may be created between the first member 100 and the first surface 11 of the battery 10, and a gap may be created between the second member 200 and the side surface 13 of the battery 10.

[0082] As shown in Figures 6a to 7b, when the first member 100 and the second member 200 undergo anisotropic thermal contraction, the second member 200 is pulled downwards from the battery 10, allowing it to come into contact with the side surface 13 of the battery 10.

[0083] The second member 200, while partially adhering to the second surface 12 of the battery 10, is pulled downward by anisotropic thermal shrinkage, thereby protecting the side surface 13 of the battery 10. As the second member 200 adheres to at least a portion of the battery 10 and undergoes anisotropic thermal shrinkage, the bond between the battery tape and the battery 10 can be made stronger.

[0084] Figure 8 is a flowchart showing an example of a battery taping method according to one embodiment of the present disclosure.

[0085] In one embodiment, the battery taping method may include the steps of: providing a battery tape including a first member 100 and a second member 200 (S100); placing the first member 100 on a first surface 11 of a battery 10 (S200); bending the second member 200 along a side surface 13 of the battery 10 and adhering at least a portion of the second member 200 to a second surface 12 of the battery 10 (S300); and heat-treating the first member 100 and the second member 200 to shrink them (S400).

[0086] The battery taping method is initiated by providing a battery tape including a first member 100 and a second member 200 (S100). The first member 100 may correspond to the area of ​​the first surface 11 of the battery 10.

[0087] In the step of providing the battery tape (S100), the first member 100 may include a first base portion 110, a first coating layer 120 laminated on both sides of the first base portion 110, and a first printed layer 130. The second member 200 may include a second base portion 210, a second coating layer 220 laminated on both sides of the second base portion 210, a second printed layer 230, and an adhesive layer 240.

[0088] In the step of providing the battery tape (S100), the first base portion 110 and the second base portion 210 may be made of an anisotropic heat-shrinkable material. After the first base portion 110 and the second base portion 210 are prepared, the first coating layer 120 and the second coating layer 220 may be formed on the first base portion 110 and the second base portion 210 by a low-temperature primer coating. For example, the low-temperature primer coating can be carried out in a temperature range of 40°C to 50°C. Alternatively, the low-temperature primer coating can be carried out in a temperature range of 42°C to 48°C. Alternatively, the low-temperature primer coating can be carried out in a temperature range of 44°C to 46°C.

[0089] Low-temperature primer coating can be performed before the heat shrink treatment, where low temperature means a temperature lower than the process temperature of the heat shrink treatment.

[0090] The first printed layer 130 may be formed on a portion of the surface of the first coating layer 120. The second printed layer 230 may also be formed on a portion of the surface of the second coating layer 220. For example, the first printed layer 130 and the second printed layer 230 may be formed by color printing followed by UV drying. In one embodiment, the first printed layer 130 and the second printed layer 230 may have a hue. For example, the hue may be dark gray.

[0091] The adhesive layer 240 may be formed on at least one surface of the second coating layer 220. For example, the second surface 12 of the battery 10 may be heat-treated at a temperature of 50°C or less for 48 hours to cause the second member 200 to adhere to the battery 10 via the adhesive layer 240.

[0092] In the step of providing the battery tape (S100), the adhesive layer 240 can be manufactured using a commonly used adhesive. The adhesive layer 240 can be formed by applying an acrylic adhesive to the second coating layer 220. In this case, the acrylic adhesive can be selected from PMMA (polymethyl methacrylate), PEMA (polyethyl methacrylate), or PBMA (polybutyl methacrylate).

[0093] The adhesive layer 240 can be coated onto the second coating layer 220 by various known methods to achieve various thicknesses. For example, the adhesive layer 240 can be formed by coating the second member 200 with an adhesive to a thickness of 2 to 16% of its total thickness by knife coating.

[0094] In step (S200) of placing the first member 100 on the first surface 11 of the battery 10, the first member 100 may be positioned facing the first surface 11 of the battery 10. In step (S200) of placing the first member 100 on the first surface 11 of the battery 10, the second member 200 may be positioned in an unfolded state on the outer casing of the side surface 13 of the battery 10.

[0095] In step (S300), which involves bending the second member 200 along the side 13 of the battery 10 and adhering at least a portion of the second member 200 to the second surface 12 of the battery 10, the second member 200 can extend from the side of the first member 100 and cover the side 13 of the battery 10. The second member 200 is bent toward the side 13 of the battery 10.

[0096] The second member 200 is bent along the side 13 of the battery 10 so that at least a portion of it can adhere to the second surface 12 of the battery 10. Here, the second member 200 extends from the four sides of the first member 100 so that it can cover the four side 13 of the battery 10.

[0097] In step (S300) of adhering a portion of the second member 200 to the second surface 12 of the battery 10, the second member 200 can be attached to at least a portion of the second surface 12 of the battery 10. Here, the second member 200 can be adhered to the second surface 12 of the battery 10 without touching each other.

[0098] For example, the second member 200 may have multiple rounded edges and a shape that narrows in width as it moves further away from the side of the first member 100, and in the step (S300) of adhering a part of the second member 200 to the second surface 12 of the battery 10, the multiple edges of the second member 200 can maintain a state of separation from each other.

[0099] In the step (S400) of heat-treating and shrinking the first member 100 and the second member 200, the first member 100, while positioned at a distance from the first surface 11 of the battery 10, may be supplied with heat above a predetermined temperature, and may contract in a first direction D1 and a second direction D2 perpendicular to the first direction D1, thereby coming into contact with the first surface 11 of the battery 10.

[0100] Furthermore, the heat treatment and shrinking step (S400) may include the step of bending the second member 200 along the side surface 13 of the battery 10 and, with at least a portion of it in contact with the second surface 12 of the battery 10, applying heat above a predetermined temperature, causing it to shrink in a first direction D1 and a second direction D2 perpendicular to the first direction D1, thereby contacting the side surface 13 of the battery 10.

[0101] The heat treatment and shrinkage step (S400) can be carried out in a temperature range of 60°C to 70°C. When heat is supplied to the first member 100 and the second member 200 in the heat treatment and shrinkage step (S400), the first member 100 and the second member 200 can undergo anisotropic thermal shrinkage.

[0102] The first member 100, when heat is supplied while it is positioned at a distance from the first surface 11 of the battery 10, can contract in a first direction D1 and a second direction D2 perpendicular to the first direction D1, and come into contact with the first surface 11 of the battery 10. The second member 200, when heat above a predetermined temperature is supplied, can contract in a first direction D1 and a second direction D2 perpendicular to the first direction D1, and come into contact with the side surface 13 of the battery 10.

[0103] In the heat treatment shrinkage step (S400), the first member 100 and the second member 200 may be formed with a thickness of 20 μm to 30 μm. The heat treatment shrinkage step (S400) may include a step in which the first member 100 and the second member 200 shrink by the same amount in a first direction D1 and a second direction D2 perpendicular to the first direction D1 when heat above a predetermined temperature is supplied.

[0104] In the heat treatment and shrinking step (S400), the first member 100 is positioned at a distance from the first surface 11 of the battery 10 before heat is supplied. When heat is supplied in this state, the first member 100 shrinks in the first direction D1 and the second direction D2, eliminating the gap and allowing it to come into contact with the first surface 11 of the battery 10.

[0105] In the heat treatment and shrinkage step (S400), before heat is supplied, the second member 200 may be positioned so that a portion of it is in contact with the second surface 12 of the battery 10 and away from the side surface 13 of the battery 10. When heat is supplied in this state, the second member 200 shrinks in the first direction D1 and the second direction D2, eliminating the gap and allowing it to come into contact with the side surface 13 of the battery 10.

[0106] In the heat treatment and shrinking step (S400), the first member 100 and the second member 200, to which heat is supplied, can shrink by the same amount in the first direction D1 and the second direction D2 perpendicular to the first direction D1. At this time, the gap between the first member 100 and the first surface 11 of the battery 10, and the gap between the second member 200 and the side surface 13 of the battery 10 are uniformly filled, thereby preventing the battery 10 from moving when dropped.

[0107] The flowchart shown in Figure 8 and the description described above are merely illustrative examples, and the scope of this disclosure is not limited to the flowchart shown in Figure 8 and the description described above. For example, one or more steps in the flowchart and the description described above can be added / modified / deleted, the order of one or more steps can be changed, and one or more steps can be performed simultaneously.

[0108] 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]

[0109] 10 batteries 11 First side 12. Second side 13 Side view 20 Protection Circuit Modules 100 First component 110 First base section 120 First coating layer 130 First printing layer 200 Second component 210 Second base section 220 Second coating layer 230 Second printing layer 240 Adhesive layer

Claims

1. A first component positioned on the first surface of the battery, The present invention includes a second member that extends from the side of the first member, covers the side of the battery, and adheres to a second surface of the battery facing the first surface, A battery tape wherein the first member undergoes anisotropic thermal shrinkage to contact the first surface of the battery, and the second member undergoes anisotropic thermal shrinkage to contact the side surface of the battery.

2. The first member is, The first base section, The first coating layer is laminated on both sides of the first base portion, The battery tape according to claim 1, wherein the first base portion corresponds to an anisotropic heat-shrinkable material.

3. The battery tape according to claim 2, wherein the first member further comprises a first printed layer laminated on at least one surface of the first coating layer.

4. The second member is, The second base section, The invention includes a second coating layer laminated on both sides of the second base portion, The battery tape according to claim 1, wherein the second base portion corresponds to an anisotropic heat-shrinkable material.

5. The battery tape according to claim 4, wherein the second member further comprises a second printed layer laminated on at least one surface of the second coating layer.

6. The battery tape according to claim 4, wherein the second member further includes an adhesive layer formed on at least one surface of the second coating layer, and the second member adheres to the second surface by the adhesive layer.

7. The battery tape according to claim 1, wherein the first member, when heat is supplied while positioned at a distance from the first surface of the battery, contracts by the same amount in a first direction and in a second direction perpendicular to the first direction, and comes into contact with the first surface of the battery.

8. The battery tape according to claim 1, wherein the second member is bent along the side of the battery so that at least a portion of it adheres to the second surface of the battery.

9. The battery tape according to claim 8, wherein when heat is supplied, the second member shrinks by the same amount in a first direction and in a second direction perpendicular to the first direction, and comes into contact with the side surface of the battery.

10. The battery tape according to claim 1, wherein a protective circuit module is attached to one side of the battery, and the second member adheres to at least a portion of the second surface of the battery while covering the protective circuit module.

11. The battery tape according to claim 1, wherein the first member and the second member include PC, PP, PE, or PET.

12. The battery tape according to claim 6, wherein the first member and the second member are heat-shrinkable in a temperature range of 60°C to 70°C.

13. The battery tape according to claim 1, wherein the first member and the second member are formed with a thickness of 20 μm to 50 μm, and when heat is supplied, they shrink by the same amount in a first direction and in a second direction perpendicular to the first direction.

14. The battery tape according to claim 1, wherein four second members are formed, each extending from one of the four sides of the first member, and each second member is attached to the second surface of the battery but does not come into contact with one another.

15. The steps include providing a battery tape including a first member and a second member, The steps include placing the first member on the first surface of the battery, The steps include bending the second member along the side of the battery and adhering at least a portion of the second member to the second surface of the battery, The process includes the step of heat-treating the first member and the second member to cause them to shrink, A battery taping method comprising the following steps: the first member undergoes anisotropic thermal shrinkage to contact the first surface of the battery, and the second member undergoes anisotropic thermal shrinkage to contact the side surface of the battery.

16. The battery taping method according to claim 15, wherein in the step of adhering the second member, the second member is adhered to the second surface of the battery so that it does not come into contact with each other.

17. The battery taping method according to claim 15, wherein the heat treatment step includes the step of supplying heat to the first member while it is positioned at a distance from the first surface of the battery, causing it to contract in a first direction and a second direction perpendicular to the first direction, and to come into contact with the first surface of the battery.

18. The battery taping method according to claim 15, wherein the heat treatment and shrinking step includes the step of bending the second member along the side of the battery so that at least a portion of it is adhered to the second surface of the battery, and when heat is supplied, it shrinks in a first direction and a second direction perpendicular to the first direction to come into contact with the side of the battery.

19. The battery taping method according to claim 15, wherein the heat treatment step is performed in a temperature range of 60°C to 70°C.

20. The battery taping method according to claim 15, wherein the heat treatment step includes the step of forming the first member and the second member with a thickness of 20 μm to 50 μm, and when heat is supplied, they shrink by the same amount in a first direction and in a second direction perpendicular to the first direction.

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