Battery pack

Abstract

A battery pack includes: a battery cell including a first main surface and a second main surface opposite to each other; and a cover tape including a first cover area and a second cover area, the first cover area and the second cover area being different areas on the first main surface and the second main surface of the battery cell, respectively, and the cover tape having an inner surface facing the battery cell and an outer surface facing away from the battery cell, wherein the cover tape includes a gloss coating forming an outer surface of the second cover area formed in a relatively small area.

Description

[0001] This application claims priority and benefit to Korean Patent Application No. 10-2024-0046952, filed on April 5, 2024, with the Korean Intellectual Property Office, the disclosure of which is incorporated herein by reference in its entirety. Technical Field

[0002] The embodiment relates to a battery pack. Background Technology

[0003] Generally, unlike primary batteries which cannot be recharged, secondary batteries are batteries that can be both charged and discharged. Secondary batteries are used as an energy source for mobile devices, electric vehicles, hybrid vehicles, electric bicycles, and uninterruptible power supplies, and can be used either as a single battery or as a group of multiple batteries connected and bundled into a single unit, depending on the type of external device to which they are applied.

[0004] Small mobile devices, such as mobile phones, can operate for a period of time using the output and capacity of a single battery. For larger mobile devices that require longer or higher power consumption, such as laptops, electric vehicles, or hybrid vehicles, a battery pack containing multiple batteries is preferred due to output and capacity limitations. Depending on the number of built-in batteries, the output voltage or output current can be increased. Utility Model Content

[0005] The embodiment includes a battery pack comprising: a battery cell including a first main surface and a second main surface opposite to each other; and a cover strip including a first cover area and a second cover area, the first cover area and the second cover area having different areas and respectively disposed on the first main surface and the second main surface of the battery cell, and the cover strip having an inner surface facing the battery cell and an outer surface facing away from the battery cell, wherein the cover strip includes a glossy coating layer forming the outer surface of the second cover area.

[0006] The outer surface of the second covering area may have a lower surface roughness than the outer surface of the first covering area.

[0007] The outer surface of the second coverage area may have a higher reflectivity than the outer surface of the first coverage area.

[0008] The outer surface of the second covered area may have a lower peel strength or adhesion than the outer surface of the first covered area.

[0009] Regarding the peel strength or adhesion used to peel the corresponding object from the outer surface of the first covering area and the outer surface of the second covering area, the peel strength or adhesion of the outer surface of the second covering area may be lower than that of the outer surface of the first covering area.

[0010] The first coverage area and the second coverage area may be continuous along the tape substrate, which is a common support substrate for the first coverage area and the second coverage area. The outer surface of the first coverage area may be formed by the outer surface of the tape substrate, and the outer surface of the second coverage area may be formed by the gloss coating on the outer surface of the tape substrate.

[0011] Compared to the outer surface of the substrate forming the outer surface of the first covering region, the outer surface of the glossy coating forming the second covering region may have at least one surface characteristic, including: i) lower surface roughness; ii) higher reflectivity; or iii) lower peel strength or adhesion.

[0012] Compared to the outer surface of the substrate of the second covering region on which the gloss coating is formed, the outer surface of the second covering region formed by the gloss coating may have at least one surface characteristic, including: i) lower surface roughness; ii) higher reflectivity; or iii) lower peel strength or adhesion.

[0013] The covering tape may include: the tape substrate; the glossy coating formed on the outer surface of the tape substrate in the second covering region; and an adhesive layer formed on the inner surface of the tape substrate in the first covering region and the second covering region.

[0014] The battery cell may further include: a top surface and a bottom surface opposite to each other, connecting the first main surface to the second main surface; and a first side surface and a second side surface, opposite to each other in a direction intersecting the direction extending from the top surface toward the bottom surface, and connecting the first main surface and the second main surface to each other, wherein the first main surface and the second main surface occupy an area larger than the area of ​​any one of the top surface, the bottom surface, the first side surface, and the second side surface.

[0015] The second coverage area may include: a 2-1 coverage area extending from the first coverage area disposed on the first main surface to the second main surface and surrounding the first side surface; a 2-2 coverage area extending from the first coverage area disposed on the first main surface to the second main surface and surrounding the second side surface; and a 2-3 coverage area extending from the first coverage area disposed on the first main surface to the second main surface and surrounding the bottom surface.

[0016] The second-1 covering area may be arranged on the second main surface at a position adjacent to the first side surface, the second-2 covering area may be arranged on the second main surface at a position adjacent to the second side surface, and the second-3 covering area may be arranged on the second main surface at a position adjacent to the bottom surface, wherein the interior region of the second main surface is exposed from the second covering area, and the interior region of the second main surface includes the central region of the second main surface.

[0017] The protective strip can be attached to the interior area of ​​the second main surface that is exposed from the second covered area.

[0018] The protective strip can cover the inner area of ​​the second main surface exposed from the second coverage area, and can cover the end portions of the second-1 coverage area, the second-2 coverage area, and the second-3 coverage area extending toward the inner area.

[0019] Peeling tabs for peeling off the protective strip can be formed on the protective strip.

[0020] The second-1 coverage area, the second-2 coverage area, and the second-3 coverage area may have different areas and different shapes from each other.

[0021] The second-1 covering area may include a wide and a narrow portion of different widths in a stepped manner in the longitudinal direction of the first side surface, the second-2 covering area may extend with a uniform width in the longitudinal direction of the second side surface, and the second-3 covering area may include a pair of second-3 covering areas spaced apart from each other in the longitudinal direction of the bottom surface.

[0022] Compared to the narrow width portion of the second-1 covering area, the wide width portion of the second-1 covering area can be arranged with a relatively wide width in the longitudinal direction of the first side surface at a position relatively close to the first side surface, and compared to the wide width portion of the second-1 covering area, the narrow width portion of the second-1 covering area can be arranged with a relatively narrow width in the longitudinal direction of the first side surface at a position relatively far from the first side surface.

[0023] Among the 2-1 coverage area, the 2-2 coverage area, and the 2-3 coverage area, the 2-1 coverage area has the largest area, the 2-3 coverage area has the smallest area, and the 2-2 coverage area has an area smaller than the 2-1 coverage area but larger than the 2-3 coverage area.

[0024] The covering strip may further include a region connected to the second-1 covering area and the second-2 covering area and covering the first side surface and the second side surface adjacent to the second main surface of the battery cell, and a region connected to the region covering the first side surface and the second side surface and covering the top surface and the bottom surface adjacent to the first side surface and the second side surface. Attached Figure Description

[0025] Features will become apparent to those skilled in the art from the detailed description of exemplary embodiments with reference to the accompanying drawings, wherein:

[0026] Figure 1 It is a perspective view of the first main surface of a battery pack according to one or more embodiments;

[0027] Figure 2 According to one or more embodiments Figure 1 A perspective view of the second main surface of the battery pack shown;

[0028] Figure 3 According to one or more embodiments Figure 1 A perspective view of the first main surface of a battery cell in the battery pack shown;

[0029] Figure 4 According to one or more embodiments Figure 1 An exploded perspective view of the second main surface of the battery pack shown;

[0030] Figure 5 According to one or more embodiments Figure 1 A plan view of the second main surface of the battery pack shown;

[0031] Figure 6 According to one or more embodiments Figure 1 The diagram showing the unfolded coverage area;

[0032] Figure 7 It is according to one or more embodiments along Figure 6 A cross-sectional view of the cover zone intercepted by line VII-VII in the diagram;

[0033] Figure 8A and Figure 8B The different reflection characteristics of the second and first coverage areas of the incident light, as illustrated by one or more embodiments, are explained as... Figure 1 A graph showing the different reflectivities of the surface properties of the first and second covered areas of the covering strip;

[0034] Figure 9A and Figure 9B The peel strength or adhesion of the second and first coverage areas against the protective tape and set tape peeling from the second and first coverage areas, respectively, according to one or more embodiments, is explained as... Figure 1 The diagram shows the different peel strengths or adhesions of the surface properties of the first and second covered areas of the covering strip; and

[0035] Figure 10A and Figure 10B Experimental results according to one or more embodiments are shown to evaluate the adhesion of a cover strip without a gloss coating and the adhesion of a cover strip with a gloss coating, to confirm the difference in adhesion depending on whether a gloss coating is formed. Detailed Implementation

[0036] Example embodiments will now be described more fully below with reference to the accompanying drawings; however, they may be implemented in different forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey exemplary implementation methods to those skilled in the art.

[0037] In the drawings, the dimensions of layers and regions may be exaggerated for clarity. It will also be understood that if a layer or element is referred to as "on" another layer or substrate, it may be directly on that other layer or substrate, or there may be intervening layers. Furthermore, it will be understood that if a layer is referred to as "below" another layer, it may be directly below, or there may be one or more intervening layers. Additionally, it will be understood that if a layer is referred to as "between two layers," it may be the only layer between the two layers, or there may be one or more intervening layers. Similar reference numerals always indicate similar elements.

[0038] As used herein, the term "and / or" includes any one and all combinations of one or more of the associated listed items. Expressions such as "at least one of..." modify the entire list of elements if they follow the list of elements, not individual elements within the list.

[0039] In the following description, a battery pack according to one or more embodiments is described with reference to the accompanying drawings.

[0040] Figure 1 It is a perspective view of the first main surface of a battery pack according to one or more embodiments.

[0041] Figure 2 According to one or more embodiments Figure 1 A perspective view of the second main surface of the battery pack shown.

[0042] Figure 3 According to one or more embodiments Figure 1 A perspective view of the first main surface of a battery cell in the battery pack shown.

[0043] Figure 4 According to one or more embodiments Figure 1 An exploded perspective view of the second main surface of the battery pack shown.

[0044] Figure 5 According to one or more embodiments Figure 1 The diagram shows a plan view of the second main surface of the battery pack.

[0045] Figure 6 According to one or more embodiments Figure 1 The diagram shows the unfolded shape of the coverage area.

[0046] Figure 7 It is according to one or more embodiments along Figure 6 A cross-sectional view of the covering zone taken from line VII-VII in the diagram.

[0047] Referring to the accompanying drawings, a battery pack according to one or more embodiments may include: a battery cell 10, including a first main surface M1 and a second main surface M2 opposite to each other; and a covering strip attached to the first main surface M1 and the second main surface M2 of the battery cell 10.

[0048] According to one or more embodiments, the battery cell 10 may include a first main surface M1 and a second main surface M2 occupying a relatively large area and being a pair of opposite first main surfaces M1 and M2, a top surface U and a bottom surface B connecting the first main surface M1 to the second main surface M2 and being a pair of opposite top surfaces U and B, and a first side surface S1 and a second side surface S2 connecting the first main surface M1 to the second main surface M2 and being opposite to each other in a direction intersecting with the direction from the top surface U toward the bottom surface B.

[0049] According to one or more embodiments, the top surface U of the battery cell 10 can be formed as an electrode surface, the electrodes of the battery cell 10 are arranged on the electrode surface, and the charging power and discharging power can be input and output as electrical input and electrical output of the battery cell 10 through the top surface U or the electrode surface. For this purpose, a circuit portion 20 electrically connected to the electrodes of the battery cell 10 can be disposed on the top surface U or the electrode surface of the battery cell 10. According to one or more embodiments, the circuit portion 20 may include: a circuit board equipped with switching devices (such as field-effect transistors (FETs)) to control the charging and discharging operations of the battery cell 10; and input / output wiring IO connected to the circuit board, forming paths for the charging and discharging current of the battery cell 10 and connected to an external device (external charger or external load).

[0050] According to one or more embodiments, the battery cell 10 may be surrounded by a cover strip T1. For example, the cover strip T1 may extend toward a second main surface M2 while covering a first main surface M1 of the battery cell 10. In order to substantially cover the entire first main surface M1 and a portion of the second main surface M2 of the battery cell 10, a portion of the cover strip T1 may cover the entire first main surface M1, and the remainder of the cover strip T1 may extend toward the second main surface M2 opposite to the first main surface M1 to cover a portion of the second main surface M2. According to one or more embodiments, the cover strip T1 may cover the first main surface M1 and the second main surface M2 using different first coverage areas A1 and second coverage areas A2. The first coverage area A1 where the cover strip T1 covers the first main surface M1 of the battery cell 10 may correspond to substantially the entire area of ​​the first main surface M1, and the second coverage area A2 where the cover strip T1 covers the second main surface M2 of the battery cell 10 may correspond to a portion of the area smaller than the entire area of ​​the second main surface M2. However, according to some embodiments, within the range where the cover strip T1 covers the first main surface M1 and the second main surface M2 of the battery cell 10 using different first cover areas A1 and second cover areas A2, the cover strip T1 may cover all or a portion of the first main surface M1 of the battery cell 100, and may also cover a portion of the second main surface M2 of the battery cell 10. In other words, the cover strip T1 may cover all or a portion of the first main surface M1 of the battery cell 10, and may cover a portion of the second main surface M2 of the battery cell 10 that is smaller than the first cover area A1 covering the first main surface A1 of the battery cell 10. However, the cover strip T1 does not cover the entire second main surface M2 of the battery cell 10.

[0051] refer to Figures 1 to 5According to one or more embodiments, an insulating tape T3 may surround a circuit portion 20 disposed on the top surface U of the battery cell 10. The insulating tape T3 may protect the circuit portion 20 from physical and electrical interference between the circuit portion 20 and the surrounding environment by surrounding at least a portion of the circuit portion 20 disposed on the top surface U of the battery cell 10.

[0052] Figure 8A and Figure 8B This illustrates the different reflection characteristics of the second and first coverage areas of incident light to explain why... Figure 1 The diagram shows the different reflectivities of the surface properties of the first and second covered areas of the covering strip.

[0053] Figure 9A and Figure 9B These are examples illustrating the peel strength or adhesion of the second and first coverage areas against the protective strip and the installation strip peeling off from the second and first coverage areas, respectively, to explain as... Figure 1 The diagram shows the different peel strengths or adhesions of the surface properties of the first and second covered areas of the covering strip.

[0054] Referring to the accompanying drawings, according to one or more embodiments, the cover strip T1 may be formed in different configurations in the first cover region A1 and the second cover region A2 to exhibit different surface properties. For example, according to some embodiments, the cover strip T1 may have different surface properties, such as different reflectivities, surface roughness, or peel strength (or adhesion). According to one or more embodiments, the fact that the cover strip T1 has different surface properties in the first cover region A1 and the second cover region A2 can refer to differences in surface properties on the surfaces of the first cover region A1 and the second cover region A2, either through different surface treatments or by forming the first cover region A1 and the second cover region A2 in different configurations. For example, according to some embodiments, reflectivity, which refers to the relative ratio of the intensity of reflected light to the intensity of incident light incident on the surface of the cover strip T1, can correspond to the surface properties of the cover strip T1. Surface roughness, as a measure of whether the surface of the cover strip T1 forms a rough or smooth surface, can correspond to the surface properties of the cover strip T1. Peel strength (or adhesion), which refers to the strength required to peel a corresponding object attached to the cover strip T1 using the same adhesive from the cover strip T1, can also correspond to the surface properties of the cover strip T1. In other words, as a surface characteristic of the covering tape T1 or the first covering area A1 and the second covering area A2, the peel strength (or adhesion) of the covering tape T1 or the peel strength (or adhesion) of the first covering area A1 and the second covering area A2 forming the covering tape T1 can refer to the strength required to peel the corresponding object attached to the covering tape T1 or the first covering area A1 and the second covering area A2 from the covering tape T1, rather than the strength required to peel the covering tape T1 or the first covering area A1 and the second covering area A2. For example, according to one or more embodiments, the peel strength or adhesion can refer to the strength required to peel the protective tape T2 attached to the second covering area A2 or the covering tape T1 forming the second covering area A2 from the second covering area A2 or the covering tape T1 forming the second covering area A2.

[0055] Therefore, according to one or more embodiments, the first covering region A1 of the covering strip T1 disposed on the first main surface M1 of the battery cell 10 may have different surface characteristics than the second covering region A2 of the covering strip T1 disposed on the second main surface M2 of the battery cell 10. For example, the first covering region A1 and the second covering region A2 of the covering strip T1 may have the following relationship with respect to the surface characteristics listed above:

[0056] i) The reflectivity of the first coverage area A1 is less than the reflectivity of the second coverage area A2.

[0057] ii) The surface roughness of the first coverage area A1 is greater than the surface roughness of the second coverage area A2, and

[0058] iii) The peel strength of the first covered area A1 is greater than that of the second covered area A2.

[0059] According to one or more embodiments, the first covering region A1 may have a relatively rough surface, and the second covering region A2 may have a relatively smooth surface. Accordingly, compared to the first covering region A1 with a relatively rough surface, the second covering region A2 with a relatively smooth surface may have a relatively high reflectivity, a relatively low surface roughness, and a relatively low peel strength. For example, according to one or more embodiments, compared to the first covering region A1 with a relatively rough surface, the second covering region A2 with a relatively smooth surface may provide a relatively small adhesive area and may have a limited volume of pores capable of accommodating the adhesive due to the relatively small pore volume.

[0060] The second covering region A2, having a relatively smooth surface, can provide a relatively small adhesive area between the corresponding object and the second covering region A2. In other words, the first covering region A1, having a relatively rough surface, can increase the adhesive area by forming multiple uneven shapes on its surface, and provides sufficient volume of pores to accommodate the adhesive due to the uneven shapes. Accordingly, the first covering region A1 can provide higher peel strength compared to the second covering region A2, which has a smooth surface.

[0061] According to one or more embodiments, the cover strip T1 does not include additional configuration to protect the first main surface M1 exposed from the first cover area A1, while substantially covering the entire first main surface M1 in the relatively large first cover area A2. Unlike the first cover area A1, the second cover area A2 covering the second main surface M2 of the battery cell 10 may be formed as the remaining portion of the cover strip T1 extending toward the second main surface M2 of the battery cell 10 after a portion of the cover strip T1 covers the first main surface M1 of the battery cell 10. According to one or more embodiments, unlike the first main surface M1 which is substantially completely covered by the first cover area A1 of the cover strip T1, the second main surface M2 is partially covered by the remaining portion of the cover strip T1 after a portion of the cover strip T1 covers the first main surface M1; a portion of the second main surface M2 may be covered by the second cover area A2 of the cover strip T1, and another portion of it not covered by the second cover area A2 of the cover strip T1 may be exposed from the cover strip T1. According to one or more embodiments, since the first covering area A1 covering the first main surface M1 of the battery cell 10 and the second covering area A2 covering the second main surface M2 of the battery cell 10 can have different areas, while the first main surface M1 and the second main surface M2 of the battery cell 10 can have substantially the same area, the second covering area A2, formed with a relatively small area, can expose a portion of the second main surface M2, rather than covering the entire second main surface M2. Therefore, the protective strip T2, separate from the covering strip T1, can be attached to the second main surface M2 to cover the exposed portion of the second main surface M2 of the battery cell 10 not covered by the covering strip T1. The protective strip T2 can cover the portion of the second main surface M2 of the battery cell 10 exposed from the covering strip T1 and the second covering area A2 of the covering strip T1. Thus, the protective strip T2 can overlap with the covering strip T1 on the second main surface M2 of the battery cell 10 without forming a space between the protective strip T2 and the covering strip T1. For example, the second main surface M2 of the battery cell 10 exposed from the space between the protective strip T2 and the covering strip T1 may not be exposed, thereby preventing the formation of physical and electrical interference with the surrounding environment of the battery cell 10. Furthermore, unlike the first covering area A1 of the covering strip T1 that covers all or most of the first main surface M1, the second covering area A2 that only covers a portion of the second main surface M2 may lift up due to a lack of adhesion to the battery cell 10. For example, the end portion at the end of the covering strip T1 may be formed in the second covering area A2 formed by the remaining portion of the covering strip T1 after a portion of the covering strip T1 covers the first main surface M1 of the battery cell 10. Accordingly, the end portion of the second covering area A2 with relatively weak adhesion to the battery cell 10 may peel off from the battery cell 10, or may cause adhesion defects, such as lifting up from the battery cell 10.The protective strip P2 can eliminate adhesion failure or lack of the second coverage area A2 by covering the portion of the second main surface M2 of the battery cell 10 exposed from the second coverage area A2 and the end portion of the second coverage area A2. The end portion of the second coverage area A2 can be protected inside the protective strip T2 and is not exposed due to the protective strip T2 covering the end portion of the second coverage area A2.

[0062] The protective strip T2 may cover the portion of the second main surface M2 of the battery cell 10 exposed from the second coverage area A2, for example, the central region of the second main surface M2 of the battery cell 10 exposed from the second coverage area A2. For example, according to one or more embodiments, the protective strip T2 may cover the end portion of the second coverage area A2 and the central region of the second main surface M2, which may be exposed from the second coverage area A2 formed by the covering strip T1 after a portion of the covering strip T1 covers the first main surface M1.

[0063] According to one or more embodiments, the second covering area A2 of the covering strip T1 may include a second-1 covering area A2-1 and a second-2 covering area A2-2 extending from the first main surface M1 to the second main surface M2 and surrounding the first side surface S1 and the second side surface S2, respectively. For example, according to one or more embodiments, the second covering area A2 of the covering strip T1 may include a second-1 covering area A2-1 extending from the first main surface M1 to the second main surface M2 and surrounding the first side surface S1, a second-2 covering area A2-2 extending from the first main surface M1 to the second main surface M2 and surrounding the second side surface S2, and a second-3 covering area A2-3 extending from the first main surface M1 to the second main surface M2 and surrounding the bottom surface B. Thus, the second covering area A2 may include the second-1 covering area A2-1, the second-2 covering area A2-2, and the second-3 covering area A2-3 formed by the remaining portion of the covering strip T1 after a portion of the covering strip T1 covers the first main surface M1, and may have different placement relationships on the second main surface M2. For example, the second-first covering area A2-1 can be mainly arranged adjacent to the first side surface S1 of the battery cell 10, the second-second covering area A2-2 can be mainly arranged adjacent to the second side surface S2 of the battery cell 10, and the second-third covering area A2-3 can be mainly arranged adjacent to the bottom surface B of the battery cell 10. Furthermore, the second-first covering area A2-1, the second-second covering area A2-2, and the second-third covering area A2-3 forming the second covering area A2 can have different areas, for example, they can have the following relationship regarding area: the area of ​​the second-first covering area A2-1 > the area of ​​the second-second covering area A2-2 > the area of ​​the second-third covering area A2-3. In one embodiment, the covering strip T1 may further include a region connected to the 2-1 covering region A2-1 and the 2-2 covering region A2-2 and covering the first side surface S1 and the second side surface S2 adjacent to the second main surface M2 of the battery cell 10, and a region connected to the region covering the first side surface S1 and the second side surface S2 and covering the top surface U and the bottom surface B adjacent to the first side surface S1 and the second side surface S2.

[0064] According to one or more embodiments, a second-1 covering region A2-1 extending from the first main surface M1 to the second main surface M2 and surrounding the first side surface S1 can be formed in a stepped shape in the longitudinal direction of the first side surface S1. For example, according to one or more embodiments, the second-1 covering region A2-1 may include a wide width portion W1 having a relatively wide width in the longitudinal direction of the first side surface S1 and a narrow width portion W2 having a relatively narrow width. Regarding the stepped arrangement of the wide width portion W1 and the narrow width portion W2 in the longitudinal direction of the first side surface S1, the wide width portion W1 may be formed relatively adjacent to the first side surface S1, and the narrow width portion W2 may be formed relatively far away from the first side surface S1.

[0065] According to one or more embodiments, a protective strip T2 may be placed on a cover strip T1. The protective strip T2 attached to the cover strip T1 may cause inconvenience in maintaining the battery cell 10 if the adhesive of the protective strip T2 remains on the cover strip T1 after peeling off the protective strip T2. Peeling the cover strip T1, contaminated with the adhesive of the protective strip T2, from the battery cell 10 to maintain the battery cell 10 may result in failure. For example, according to one or more embodiments, the protective strip T2 may be attached to both the second main surface M2 and the cover strip T1 attached to the second main surface M2. By covering the second main surface M2 and the cover strip T1 attached to the second main surface M2, the protective strip T2 can prevent peeling of the cover strip T1 from both the exposed end portion of the cover strip T1 on the second main surface M2 and the end portion of the cover strip T1 attached to the second main surface M2. According to one or more embodiments, to provide a peeling start position for the protective strip T2 from the second main surface M2 and the cover strip T1 on the second main surface M2, the protective strip T2 may include a peeling tab T2a protruding from the body of the protective strip T2. For example, according to one or more embodiments, the peeling tab T2a of the protective strip T2 can protrude from the protective strip T2 attached to the second main surface M2 to a position outside the second main surface M2 of the battery cell 10.

[0066] According to one or more embodiments, in order to eliminate contamination of the cover strip T1 due to the adhesive of the protective strip T2 if the protective strip T2 peels off from the cover strip T1, the surface characteristics of the second cover region A2 disposed on the second main surface M2 of the battery cell 10 can be improved, wherein the cover strip T1 and the protective strip T2 have a laminated structure to overlap each other on the second main surface M2 of the battery cell 10. For example, the surface characteristics of the second cover region A2 can be improved such that the second cover region A2 has different surface characteristics from the first cover region A1 disposed on the first main surface M1 of the battery cell 10. According to one or more embodiments, the second cover region A2 may have a relatively lower surface roughness, higher reflectivity, or lower peel strength (adhesion) compared to the first cover region A1. According to one or more embodiments, a coating Tc can be formed on the surface of the second cover region A2 of the cover strip T1. According to one or more embodiments, a glossy coating Tc can be formed on the surface of the second cover region A2. In other words, the cover strip T1 may include a coating forming the outer surface of the second cover region A2 such that the outer surface of the second cover region A2 has a higher gloss than the outer surface of the first cover region A1. For example, the surface of the first covering area A1 of the covering strip T1 can be formed as a relatively rough surface, and the surface of its second covering area A2 can be formed as a relatively smooth surface compared to the first covering area A2. For example, the setting strip ST (see...) is used to prevent components from falling from a kit equipped with a battery pack according to one or more embodiments and using the battery pack as a drive power source, or to prevent physical or electrical interference from other components of the kit. Figure 9B It can be attached to a first covering area A1 covering the first main surface M1 of the battery cell 10. According to one or more embodiments, a section ST (see...) is provided. Figure 9B The first covering area A1 of the first main surface M1 covering the battery cell 10 can be attached to the first covering area A1. Considering adhesion with the provided ST, the first covering area A1 of the first main surface M1 covering the battery cell 10 can be formed with a relatively rough surface (see...). Figure 9B For example, the relatively rough surface of the first coverage area A1 can increase the adhesive area with the set strip ST (see...). Figure 9B ) and the volume of pores capable of accommodating the adhesive, thereby increasing adhesion to the setting with ST (see Figure 9B ).

[0067] For example, according to one or more embodiments, the fact that the first covering region A1 and the second covering region A2 of the covering strip T1 have different surface properties can mean that different situations of different surface properties are observed. For example, if we observe the physical structure of the first covering region A1 and the second covering region A2, the fact that the first covering region A1 has a relatively rough surface that is conducive to adhesion and the second covering region A2 has a relatively smooth surface that is conducive to peeling can mean that the first covering region A1, which has a relatively rough surface, has a relatively high surface roughness compared to the second covering region A2, which has a relatively smooth surface. For example, from an optical point of view, the reflectivity of the first covering region A1 and the reflectivity of the second covering region A2 are respectively the ratio of the intensity of reflected light reflected from the first covering region A1 to the intensity of incident light incident on the first covering region A1 and the ratio of the intensity of reflected light reflected from the second covering region A2 to the intensity of incident light incident on the second covering region A2. The high reflectivity, near-specular reflection due to relatively low surface roughness, can be measured in the second covering area A2, which has a relatively smooth surface, while the relatively low reflectivity, such as scattering or diffuse reflection, due to high surface roughness, can be measured in the first covering area A1, which has a relatively rough surface. Furthermore, regarding peel strength (adhesion), i.e., the peel strength (adhesion) used to peel corresponding objects attached to the first covering area A1 and the second covering area A2 via adhesive from the first covering area A1 and the second covering area A2, the second covering area A2 can exhibit relatively low peel strength because it has a relatively small adhesive area and a volume of pores capable of accommodating the adhesive due to its relatively low surface roughness, while the first covering area A1, with its relatively rough surface, can exhibit relatively high peel strength because it has a relatively large adhesive area and a volume of pores capable of accommodating the adhesive due to its relatively high surface roughness.

[0068] According to one or more embodiments, the covering tape T1, including a first covering region A1 and a second covering region A2, may have substantially the same configuration. For example, the first covering region A1 and the second covering region A2 may include a tape substrate Ta and an adhesive (e.g., an adhesive layer) Tb formed on a first surface T11 of the tape substrate Ta (see...). Figure 7Unlike the first coverage area A1, the second coverage area A2 may further include a glossy coating Tc formed on a second surface T12 of the substrate Ta. According to one or more embodiments, the first surface T11 of the substrate Ta may refer to the inner surface of the substrate Ta facing the battery cell 10, and the second surface T12 of the substrate Ta may refer to the outer surface of the substrate Ta facing away from the battery cell 10. Furthermore, according to one or more embodiments, the substrate Ta is not limited to a single layer with a uniform composition, but may include a multilayer stack having multiple layers, each layer having a different uniform composition. For example, according to one or more embodiments, the surface of the first coverage area A1 may refer to the second surface T12 of the substrate Ta, and the surface of the second coverage area A2 may refer to the surface of the glossy coating Tc formed on the second surface T12 of the substrate Ta. Accordingly, the second surface T12 of the substrate Ta corresponding to the surface of the first coverage area A1 may be formed as a relatively rough surface, and the glossy coating Tc formed on the second surface T12 of the substrate Ta corresponding to the surface of the second coverage area A2 may be formed as a relatively smooth surface. For example, the first covering region A1 and the second covering region A2 can share a substrate Ta, which forms a common substrate (e.g., a common support substrate) for a component of a continuously extending covering strip T1. The surface of the second covering region A2 can be formed by a glossy coating Tc formed on the substrate Ta, while the surface of the first covering region A1 can be formed by the substrate Ta (e.g., the second surface T12 of the substrate Ta). Thus, since the first covering region A1 and the second covering region A2 share the substrate Ta as a common substrate for the first covering region A1 and the second covering region A2, the process of forming the first covering region A1 and the second covering region A2 with different surface properties can be simplified. For example, according to one or more embodiments, a covering strip T1 including the first covering region A1 and the second covering region A2 with different surface properties can be formed by selectively applying the glossy coating Tc to the area corresponding to the second covering region A2 on the second surface T12 of the substrate Ta, which is shared by the first covering region A1 and the second covering region A2 as a common substrate, excluding the area corresponding to the first covering region A1. Therefore, according to one or more embodiments, the fact that the first covering region A1 and the second covering region A2 have different surface properties can mean that the surface properties of the first covering region A1 exhibited by the second surface T12 of the strip substrate Ta forming the common substrate of the first covering region A1 and the second covering region A2 are different from the surface properties of the second covering region A2 exhibited by the gloss coating Tc formed on the second surface T12 of the strip substrate Ta. For example, considering the first covering region A1 overlapping each other on the first main surface M1 of the battery cell 10 and the strip ST (see... Figure 9BDue to the adhesion between the two, the surface of the first covering region A1 can be formed as a rough surface. Considering the peeling between the second covering region A2 overlapping each other on the second main surface M2 of the battery cell 10 and the protective strip T2, the glossy coating Tc formed on the surface of the second covering region A2 on the second surface T12 of the strip substrate Ta can be formed as a smooth surface.

[0069] According to one or more embodiments, the second surface T12 of the substrate Ta can form the surface of the first covering region A1. Accordingly, the substrate Ta can have a structure such as a primer applied to the fabric of the covering tape T1 to form the second surface T12 of the substrate Ta, which forms the surface of the first covering region A1, as a rough surface. In other words, the covering tape T1, including the first covering region A1 and the second covering region A2, can integrally include the substrate Ta and the adhesive Tb formed on the first surface T11 of the substrate Ta (see...). Figure 7 Considering the adhesion to the set strip ST, the second surface T12 of the strip substrate Ta can be formed into a relatively rough surface by applying a primer or the like to the fabric covering the strip T1 (see...). Figure 9B ).

[0070] For example, according to one or more embodiments, the fact that the first covering region A1 and the second covering region A2 have different surface properties can mean that the second surface T12 of the substrate Ta forming the surface of the first covering region A1 has different surface properties than the gloss coating Tc formed on the second surface T12 of the substrate Ta forming the surface of the second covering region A2. For example, the second surface T12 of the substrate Ta forming the common substrate of the first covering region A1 and the second covering region A2 has different surface properties than the gloss coating Tc formed on the second surface T12 of the substrate Ta. In this sense, according to one or more embodiments, the gloss coating Tc forming the surface of the second covering region A2 may include any component having surface properties such as relatively lower surface roughness, relatively higher reflectivity, or relatively lower peel strength (adhesion) compared to the second surface T12 of the substrate Ta forming the common substrate of the first covering region A1 and the second covering region A2 (i.e., the second surface T12 of the substrate Ta forming the surface of the first covering region A1). For example, the surface of the gloss coating Tc opposite to the battery cell 10 may include any configuration having a surface exhibiting the aforementioned surface characteristics (such as relatively low surface roughness, relatively high reflectivity, or relatively low peel strength (adhesion)). According to one or more embodiments, the gloss coating Tc may exhibit relatively high reflectivity if the relatively smooth surface of the gloss coating Tc is observed from the outside. For example, the fact that a high reflectivity similar to specular reflection is observed may mean exhibiting the surface characteristics of the gloss coating Tc. For example, according to one or more embodiments, if the surface characteristics of a layer (corresponding to the gloss coating Tc) formed on a substrate Ta forming the common substrate of the first covering region A1 and the second covering region A2 are relatively low in surface roughness, relatively high in reflectivity, or relatively low in peel strength compared to the surface characteristics of the first covering region A1 or the surface characteristics of the second surface T12 of the substrate Ta forming the common substrate of the first covering region A1 and the second covering region A2, then the layer may be understood as the gloss coating Tc of this disclosure, regardless of the specific value of the optical characteristics (such as gloss or reflectivity or peel strength). In this sense, according to one or more embodiments, the glossy coating Tc formed on the second surface T12 of the substrate Ta forming the common substrate of the first covering region A1 and the second covering region A2 can be interpreted as a broad term encompassing any layer having improved surface properties for peeling rather than adhesion.

[0071] According to one or more embodiments, the second coverage area A2 may include a 2-1 coverage area A2-1 extending from the first main surface M1 of the battery cell 10 to the second main surface M2 and surrounding the first side surface S1, a 2-2 coverage area A2-2 extending from the first main surface M1 of the battery cell 10 to the second main surface M2 and surrounding the second side surface S2, and a 2-3 coverage area A2-3 extending from the first main surface M1 of the battery cell 10 to the second main surface M2 and surrounding the bottom surface B. On the second surface T12 of the substrate Ta corresponding to the second covering area A2, a covering strip T1 including all of the second-1 covering area A2-1, the second-2 covering area A2-2, and the second-3 covering area A2-3 covering the second main surface M2 can be formed in the second covering area A2 where the glossy coating Tc is formed, or a covering strip T1 including some of the second-1 covering area A2-1, the second-2 covering area A2-2, and the second-3 covering area A2-3 covering the second main surface M2 can be formed in the second covering area A2 where the glossy coating Tc is formed, wherein the glossy coating Tc may not be formed in some areas without the second covering area A2, so as to expose the second surface T12 of the substrate Ta.

[0072] According to one or more embodiments, the second covering area A2 may include multiple areas, such as three covering areas: a second-1 covering area A2-1 adjacent to the first side surface S1 and arranged on the second main surface M2; a second-2 covering area A2-2 adjacent to the second side surface S2 and arranged on the second main surface M2; and a second-3 covering area A2-3 adjacent to the bottom surface B and arranged on the second main surface M2. According to one or more embodiments, the second-1 covering area A2-1, the second-2 covering area A2-2, and the second-3 covering area A2-3 may each have different shapes and areas. For example, the second-1 covering area A2-1 may include a wide width portion W1 and a narrow width portion W2 with different widths in a stepped manner in the longitudinal direction of the first side surface S1. For example, the second-1 covering area A2-1 may include a wide width portion W1 formed adjacent to the first side surface S1 and a narrow width portion W2 formed away from the first side surface S1. Therefore, according to one or more embodiments, by forming a wide-width portion W1 and a narrow-width portion W2 with different widths in a stepped shape in the second-1 covering region A2-1, the peeling of the covering strip T1, which can start from the second covering region A2, can be easily performed. For example, in order to repair the battery cell 10, the covering strip T1 surrounding the battery cell 10 can be peeled off, and this peeling can start from the narrow-width portion W2 of the second covering region A2 to peel off the covering strip T1. By peeling off the covering strip T1 starting from the narrow-width portion W2, which has a relatively narrow width in the longitudinal direction of the first side surface S1 of the second covering region A2, for example, by peeling off the covering strip T1 starting from the narrow-width portion W2 of the second-1 covering region A2-1 forming the second covering region A2, the covering strip T1 can be easily peeled off. The peeling of the cover strip T1 can easily begin from the narrow width portion W2 of the second-1 cover region A2-1, which has a relatively limited adhesive area with the battery cell 10, and the peeling of the cover strip T1 starting from the narrow width portion W2 can proceed toward the wide width portion W1 adjacent to the narrow width portion W2. For example, according to one or more embodiments, the second-1 cover region A2-1 can form a relatively large area compared to the other cover regions forming the second cover region A2 (including the second-2 cover region A2-2 and the second-3 cover region A2-3). Thus, as the peeling of the cover strip T1 proceeds continuously along the relatively large area by setting the second-1 cover region A2-1, which occupies a relatively large area, as the peeling start position of the cover strip T1 is set, the cover strip T1 can be easily peeled off. According to one or more embodiments, since the end portion of the cover strip T1 is formed at a position relatively far from the first side surface S1, the narrow width portion W2 of the second-1 cover region A2-1, which has a relatively narrow width in the longitudinal direction of the first side surface S1, can be used as the peeling start position.According to one or more embodiments, a peeling tab (not shown) for peeling off the cover strip T1 may be formed in the second-first cover region A2-1. For example, according to one or more embodiments, the peeling tab may be formed on a wide portion W1 in the second-first cover region A2-1 having a relatively wide width in the longitudinal direction of the first side surface S1. According to some embodiments, the second-first cover region A2-1 may provide a peeling start position for the peeling of the cover strip T1. For example, a narrow width portion W2 of the second-first cover region A2-1 may be provided as a peeling start position for the cover strip T1. According to some embodiments, the peeling tab formed on the wide width portion W1 of the second-first cover region A2-1 may also be provided as a peeling start position for the cover strip T1. The cover strip T1 can be peeled from the battery cell 10 by using the narrow width portion W2 and the peeling tab as different peeling start positions.

[0073] The second-2 covering area A2-2 can be arranged adjacent to the second side surface S2 on the second main surface M2, and can extend adjacent to the second side surface S2 on the second main surface M2 in the longitudinal direction of the second side surface S2. The second-2 covering area A2-2 can be arranged at a position opposite to the second-1 covering area A2-1 in the direction extending from the first side surface S1 toward the second side surface S2, can extend in the longitudinal direction of the second side surface S2 with substantially the same width in the longitudinal direction of the second side surface S2, and can form an area smaller than the area of ​​the second-1 covering area A2-1.

[0074] According to one or more embodiments, the covering strip T1 may be formed with wing portions 50 protruding from the second-1 covering region A2-1 and the second-2 covering region A2-2 (see...). Figure 6 In order to cover the bottom surface B and side surfaces S1 and S2 adjacent to the second main surface M2 of the battery cell 10, which is covered by the second-1 covered area A2-1 and the second-2 covered area A2-2, the wing portion 50 (see...) Figure 6 It can protrude from the 2-1 covering area A2-1 and the 2-2 covering area A2-2 toward the first side surface S1 and the second side surface S2 and the bottom surface B of the battery cell 10.

[0075] The second-third covering region A2-3 may include a pair of second-third covering regions A2-3 spaced apart from each other in the longitudinal direction of the bottom surface B at a position adjacent to the bottom surface B. Thus, the covering strip T1 can be easily peeled off from the pair of separate second-third covering regions A2. For example, the covering strip T1 surrounding the battery cell 10 can be easily peeled off by peeling from the second-first covering region A2-1 adjacent to the first side surface S1 and from the second-third covering region A2-3 adjacent to the bottom surface B. According to one or more embodiments, the second-third covering region A2-3 may be formed with a smaller area than the other areas forming the second covering region A2 (including the second-first covering region A2-1 and the second-second covering region A2-2). Among the second-first covering region A2-1, the second-second covering region A2-2, and the second-third covering region A2-3 forming the second covering region A2, the second-third covering region A2-3 may be formed with the smallest area. For example, the 2-1 covering region A2-1 can provide a peeling start position for peeling the covering strip T1 from the battery cell 10 through the narrow width portion W2. A pair of 2-3 covering regions A2-3, spaced apart from each other, with a relatively small area, can provide another peeling start position. The 2-2 covering region A2-2 can provide, for example, a peeling end position for the covering strip T1, rather than a peeling start position. According to some embodiments, a peeling tab (not shown) formed on the wide width portion W1 of the 2-2 covering region A2-2 can also provide a peeling start position for the covering strip T1.

[0076] For example, the peeling of the cover strip T1, starting from the second-1 cover area A2-1 and the second-3 cover area A2-3, can proceed along the first main surface M1 and end at the second-2 cover area A2-2 on the second main surface M2. According to one or more embodiments, the second-1 cover area A2-1 can be formed with a relatively wide area to provide a stable peeling start point. The second-3 cover area A2-3 can be formed with a minimal area to facilitate peeling. The second-2 cover area A2-2, providing the peeling end point, can be formed with an area approximately midway between the second-1 cover area A2-1 and the second-3 cover area A2-3. For example, the second-1 cover area A2-1 can be formed with a relatively large area to initiate the peeling of the cover strip T1 and ensure stable peeling, and the second-3 cover area A2-3 can provide another peeling start point for peeling the cover strip T1 from the bottom surface B without interfering with the peeling of the cover strip T1 starting from the first main surface M1. According to one or more embodiments, the protective strip T2 can be attached from the center position of the battery cell 10 exposed from the second main surface M2 of the battery cell 10, to cover the entirety of the second-1 covering area A2-1, the second-2 covering area A2-2, and the second-3 covering area A2-3 forming the second covering area A2. According to one or more embodiments, the protective strip T2 can be attached from the center position of the second main surface M2 (where the end portions are concentrated) to cover all end portions of the second-1 covering area A2-1 or the second-3 covering area A2-3.

[0077] According to one or more embodiments, in order to repair the battery cell 10, it may be necessary to peel off the cover strip T1 and the protective strip T2 surrounding the battery cell 10. For example, to provide a peel start point for peeling off the protective strip T2, a peeling tab T2a may be formed on one side of the protective strip T2 to provide a peel start point. For example, the peeling tab T2a of the protective strip T2 may protrude beyond the second main surface M2 and protrude outwards from the battery cell 10. According to one or more embodiments, the protective strip T2 attached to the second main surface M2 of the battery cell 10 may be peeled off, and the cover strip T1 may be peeled off from the peeling tab (not shown) formed on the cover strip T1 as a peel start point or from the end portion of the second cover area A2 exposed after peeling off the protective strip T2. The battery cell 10 may be exposed due to the peeling off of the cover strip T1, and the exposed battery cell 10 may be repaired.

[0078] Figure 10A and Figure 10BExperimental results are shown to evaluate the adhesion of cover strips without a gloss coating and the adhesion of cover strips with a gloss coating, to confirm the difference in adhesion depending on whether a gloss coating is formed.

[0079] refer to Figure 10A For the cover tape without a glossy coating, an average adhesive force of 3436.53 gf was measured. (Reference) Figure 10B For the cover strip with a glossy coating, an average adhesive force of 1728.78 gf was measured. These experimental results confirm that the adhesive strength decreases due to the formation of the glossy coating, and confirm that the adhesive strength decreases by approximately 50%. For example, in... Figure 10A and Figure 10B In the experiment, the same corresponding objects, including the same adhesive and the same substrate, were attached to cover tapes with and without gloss coatings, and the peel strength or adhesion of the corresponding objects attached to each cover tape was measured.

[0080] According to this disclosure, in order to maintain the battery cells, a battery pack is provided having improved surface characteristics to achieve different adhesion or peel strength depending on the location of the cover strip, thereby eliminating peel failure or reattachment of the cover strip due to adhesive residue on the cover strip if the cover strip surrounding the battery cells and the protective strip exposed from the end portion of the cover strip including the cover strip are peeled off.

[0081] It should be understood that the embodiments described herein are to be considered in a descriptive sense only and are not intended to be limiting. The description of features or aspects within each embodiment should generally be considered applicable to other similar features or aspects in other embodiments. Although one or more embodiments have been described with reference to the figures, those skilled in the art will understand that various changes in form and detail may be made therein without departing from the spirit and scope of this disclosure as defined by the appended claims.

[0082] Example embodiments have been disclosed herein. While specific terminology has been used, it is used and interpreted in a general and descriptive sense only and is not intended to be limiting. In some cases, as will be apparent to those skilled in the art at the time of filing this application, features, characteristics, and / or elements described in connection with particular embodiments may be used alone or in combination with features, characteristics, and / or elements described in connection with other embodiments, unless otherwise specifically stated. Accordingly, those skilled in the art will understand that various changes in form and detail may be made without departing from the spirit and scope of this disclosure as set forth in the appended claims.

Claims

1. A battery pack characterized by comprising: The battery pack includes: A single battery cell includes a first main surface and a second main surface that are opposite to each other; and A cover strip includes a first cover area and a second cover area, the first cover area and the second cover area having different areas and respectively disposed on the first main surface and the second main surface of the battery cell, and the cover strip having an inner surface facing the battery cell and an outer surface facing away from the battery cell, wherein the cover strip includes a glossy coating forming the outer surface of the second cover area.

2. The battery pack of claim 1, wherein, The outer surface of the second covering region has a lower surface roughness than the outer surface of the first covering region.

3. The battery pack of claim 1, wherein, The outer surface of the second coverage area has a higher reflectivity than the outer surface of the first coverage area.

4. The battery pack of claim 1, wherein, The outer surface of the second covered area has a lower peel strength or adhesion than the outer surface of the first covered area.

5. The battery pack of claim 4, wherein, Regarding the peel strength or adhesion for peeling corresponding objects attached to the outer surface of the second covering area and the outer surface of the first covering area from the outer surface of the second covering area and the outer surface of the first covering area, respectively, the peel strength or adhesion of the outer surface of the second covering area is lower than that of the outer surface of the first covering area.

6. The battery pack according to claim 1, characterized in that: The first coverage area and the second coverage area are continuous along the strip substrate, which is a common support substrate for both the first coverage area and the second coverage area. The outer surface of the first covered area is formed by the outer surface of the substrate, and The outer surface of the second covered area is formed by the glossy coating on the outer surface of the substrate.

7. The battery pack of claim 6, wherein, Compared to the outer surface of the substrate forming the outer surface of the first covering region, the outer surface of the glossy coating forming the outer surface of the second covering region has at least one surface characteristic, the at least one surface characteristic including: i) Lower surface roughness; ii) High reflectivity; or iii) Lower peel strength or adhesion.

8. The battery pack of claim 6, wherein, Compared to the outer surface of the substrate of the second covered area where the glossy coating is formed, the outer surface of the second covered area formed by the glossy coating has at least one surface characteristic, the at least one surface characteristic including: i) Lower surface roughness; ii) High reflectivity; or iii) Lower peel strength or adhesion.

9. The battery pack of claim 6, wherein, The covering strip includes: The belt substrate; The glossy coating is formed in the second coverage area on the outer surface of the substrate; and An adhesive layer is formed on the inner surface of the tape substrate in the first and second coverage areas.

10. The battery pack of claim 1, wherein, The battery cell further includes: The top and bottom surfaces, which are opposite to each other, connect the first main surface to the second main surface; and The first side surface and the second side surface are opposite to each other in the direction that intersects the direction extending from the top surface toward the bottom surface, and connect the first main surface and the second main surface to each other, wherein the first main surface and the second main surface occupy an area larger than the area of ​​any one of the top surface, the bottom surface, the first side surface and the second side surface.

11. The battery pack of claim 10, wherein, The second coverage area includes: The second-1 covering area extends from the first covering area disposed on the first main surface to the second main surface and surrounds the first side surface; The second-2 covering area extends from the first covering area disposed on the first main surface to the second main surface and surrounds the second side surface; and The second-third covering area extends from the first covering area disposed on the first main surface to the second main surface and surrounds the bottom surface.

12. The battery pack of claim 11, wherein, The second-1 covering area is arranged on the second main surface at a position adjacent to the first side surface. The second-2 covering area is arranged on the second main surface at a position adjacent to the second side surface, and The second-third covering area is arranged on the second main surface at a position adjacent to the bottom surface, wherein the interior region of the second main surface is exposed from the second covering area, and the interior region of the second main surface includes the central region of the second main surface.

13. The battery pack of claim 12, wherein, The protective strip is attached to the interior area of ​​the second main surface exposed from the second covered area.

14. The battery pack according to claim 13, characterized in that, The protective strip covers the inner region of the second main surface exposed from the second coverage area, and covers the end portions of the second-1 coverage area, the second-2 coverage area, and the second-3 coverage area extending toward the inner region.

15. The battery pack according to claim 13, characterized in that, Peeling tabs for peeling off the protective strip are formed on the protective strip.

16. The battery pack according to claim 11, characterized in that, The second-1 coverage area, the second-2 coverage area, and the second-3 coverage area have different areas and different shapes from each other.

17. The battery pack according to claim 16, characterized in that, The second-1 covering area includes a wide-width portion and a narrow-width portion that are stepped in different widths in the longitudinal direction of the first side surface. The second-2 covering area extends with a uniform width in the longitudinal direction of the second side surface, and The second-third covering area comprises a pair of second-third covering areas spaced apart from each other in the longitudinal direction of the bottom surface.

18. The battery pack according to claim 17, characterized in that: Compared to the narrow width portion of the second-1st covering area, the wide width portion of the second-1st covering area is arranged at a position relatively close to the first side surface with a relatively wide width in the longitudinal direction of the first side surface, and Compared to the wide portion of the second-1 covering area, the narrow portion of the second-1 covering area is arranged at a position relatively far from the first side surface with a relatively narrow width in the longitudinal direction of the first side surface.

19. The battery pack according to claim 16, characterized in that, Among the 2-1 coverage area, the 2-2 coverage area, and the 2-3 coverage area, the 2-1 coverage area has the largest area, the 2-3 coverage area has the smallest area, and the 2-2 coverage area has an area smaller than the 2-1 coverage area but larger than the 2-3 coverage area.

20. The battery pack according to claim 16, characterized in that, The covering strip further includes a region connected to the second-1 covering area and the second-2 covering area and covering the first side surface and the second side surface adjacent to the second main surface of the battery cell, and a region connected to the region covering the first side surface and the second side surface and covering the top surface and the bottom surface adjacent to the first side surface and the second side surface.

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