Battery pack

Abstract

A battery pack includes: a battery cell; a first attachment cover surrounding a first portion of the battery cell and attachable to and detachable from the battery cell; a second attachment cover surrounding a second portion of the battery cell at a different position from the first attachment cover, and attachable to and detachable from the battery cell; and a release cover covering at least a portion of the first attachment cover and at least a portion of the second attachment cover, and attachable to and detachable from the first attachment cover and the second attachment cover.

Description

[0001] This application claims priority to and the benefit of Korean Patent Application No. 10-2024-0008929, filed on January 19, 2024, in the Korean Intellectual Property Office, the entire disclosure of which is incorporated herein by reference. TECHNICAL FIELD

[0002] Aspects of some embodiments relate to a battery pack. BACKGROUND

[0003] A secondary battery is a battery generally configured to be repeatedly charged and discharged, and can be used as an energy source for mobile devices, electric vehicles, hybrid vehicles, electric bicycles, uninterruptible power supplies, etc. The secondary battery can be used as a single battery cell according to the type of an external device to which it is applied, or as a module or a pack in which a plurality of battery cells are connected and constitute one unit.

[0004] The above information disclosed in this Background section is only for enhancement of understanding of the background of the disclosure, and therefore, it can not necessarily constitute the prior art. SUMMARY

[0005] Aspects of some embodiments include a battery pack that can attach a cover to a battery cell relatively stably.

[0006] However, the features according to embodiments of the disclosure are not limited to the above-described features, and other features not mentioned can be more clearly understood by those skilled in the art through the following description of embodiments according to the disclosure.

[0007] Additional aspects will be set forth in part in the description which follows, and in part will become apparent to those skilled in the art upon examination of the following description and drawings, or can be learned by practice of the presented embodiments of the disclosure.

[0008] According to some embodiments, a battery pack can include a battery cell; a first attachment cover surrounding a portion of the battery cell and attachable to and detachable from the battery cell; a second attachment cover surrounding another portion of the battery cell at a different location from the first attachment cover and attachable to and detachable from the battery cell; and a release cover covering at least a portion of the first attachment cover and at least a portion of the second attachment cover and attachable to and detachable from the first attachment cover and the second attachment cover.

[0009] According to some embodiments, the first attachment cover can be at the same level as the second attachment cover, and the release cover can be at a different level from the first attachment cover and the second attachment cover.

[0010] According to some embodiments, the second attachment cover can be positioned inward in a planar direction from a contour (or inner edge) of the first attachment cover.

[0011] According to some embodiments, the first attachment cover can include an opening, and the second attachment cover can be located inside the opening, can not overlap the first attachment cover, and a size of the second attachment cover can be equal to or smaller than a size of the opening.

[0012] According to some embodiments, the second attachment cover can be attached to or detached from the battery cell independently of the first attachment cover.

[0013] According to some embodiments, the battery cell can include a first surface, a second surface positioned opposite the first surface, a pair of long sides connecting the first surface and the second surface, and a pair of short sides connecting the first surface and the second surface at positions different from those of the pair of long sides.

[0014] According to some embodiments, the first attachment cover can surround all of the second surface, a portion of the first surface, and at least a portion of each of the pair of long sides.

[0015] According to some embodiments, the release cover can be on surfaces of the first attachment cover and the second attachment cover opposite surfaces of the first attachment cover and the second attachment cover facing the battery cell.

[0016] According to some embodiments, in a state in which the release cover is located on the first attachment cover and the second attachment cover, a portion of the first attachment cover can be located inside the release cover, and another portion of the first attachment cover can be located outside the release cover.

[0017] According to some embodiments, the release cover can include a first region covering at least a portion of the first attachment cover and at least a portion of the second attachment cover, and a second region extending from the first region toward any one of the pair of short sides and not overlapping the battery cell.

[0018] According to some embodiments, a protection circuit module connected to the battery cell can be further included, and the second region can extend toward a short side of the pair of short sides at a position corresponding to the protection circuit module and can be further convex outward than the short side.

[0019] According to some embodiments, the first region can have an adhesive material applied to a surface facing the battery cell, and the second region can not have an adhesive material applied to a surface facing the battery cell.

[0020] According to some embodiments, an adhesive material coated to a surface of the first attachment cover and the second attachment cover facing the battery cell can have a greater adhesive force than an adhesive force of the adhesive material coated to the first region.

[0021] According to some embodiments, the first attachment cover can include an inner region attached to the second surface, a first outer region connected to the inner region to correspond to any one of the long sides of the battery cell, and a second outer region connected to the inner region to correspond to the other of the long sides of the battery cell.

[0022] According to some embodiments, the release cover can cover an edge region.

[0023] According to some embodiments, a battery pack includes a battery cell, a first attachment cover surrounding a portion of the battery cell and attachable to and detachable from the battery cell, and a second attachment cover surrounding another portion of the battery cell at a different location from the first attachment cover and attachable to and detachable from the battery cell. BRIEF DESCRIPTION OF DRAWINGS

[0024] The above and other aspects, features, and characteristics of certain embodiments of the present disclosure will become more apparent from the following description with reference to the attached drawings.

[0025] The accompanying drawings, which are included to provide a further understanding of the application and are incorporated in and constitute a part of this application, illustrate embodiments of the present application and together with the description serve to explain the technical idea of the present application.

[0026] Figure 1 Illustrates one side of a battery pack according to some embodiments of the present disclosure.

[0027] Figure 2 Illustrates the other side of a battery pack according to some embodiments of the present disclosure.

[0028] Figure 3 Is an exploded view of a battery cell and a protection circuit module according to some embodiments of the present disclosure.

[0029] Figure 4 Illustrates a battery cell according to some embodiments of the present disclosure.

[0030] Figure 5 Is an exploded view of a battery cell and a protection circuit module according to some embodiments of the present disclosure.

[0031] Figure 6 Illustrates a battery cell according to some embodiments of the present disclosure.

[0032] Figure 7An example of a release cover according to some embodiments of the disclosure.

[0033] Figure 8 and Figure 9 An example of a state in which a first attachment cover, a second attachment cover, and a release cover according to some embodiments of the disclosure are attached to a battery cell.

[0034] Figure 10 An example of a state in which a release cover according to some embodiments of the disclosure is removed from a battery cell. DETAILED DESCRIPTION

[0035] Reference will now be made in detail to aspects of some embodiments, examples of which are illustrated in the accompanying drawings, wherein like reference numerals refer to like elements throughout. In this regard, embodiments according to the present disclosure can have different forms and should not be construed as being limited to the descriptions set forth herein. Accordingly, the embodiments are described below, by reference to the drawings, only, to explain aspects of the present description. As used herein, the term “and / or” includes any and all combinations of one or more of the associated listed items. Expressions such as “at least one of,” when preceding a list of elements, modify the entire list of elements and do not modify the individual elements of the list.

[0036] The embodiments of the present disclosure and the method for implementing the same can be understood more readily by reference to the detailed description of the embodiments and the accompanying drawings. In the following, the embodiments will be described in more detail with reference to the accompanying drawings. However, the described embodiments can be modified in various ways, and can be implemented in different forms, and the present disclosure should not be construed as being limited to the embodiments described herein. In addition, individual features of various embodiments of the present disclosure can be combined with each other or partially or wholly incorporated, so that various technically interconnected and actuated operations are achieved. Individual embodiments can be implemented independently of each other or in association with each other. The described embodiments are provided as examples so that the present disclosure can be complete, and the idea of the present disclosure will be sufficiently conveyed to one of ordinary skill in the art. The present disclosure should be understood to include all modifications and equivalents, and substitutions can be made within the spirit and technical scope of the present disclosure. Therefore, processes, components, and technologies that one of ordinary skill in the art fully understands that aspects of the present disclosure are not required can not be described.

[0037] Unless otherwise stated, throughout the drawings and specification, the same reference numbers, letters, or combinations thereof, refer to the same components, and the description thereof is omitted. In addition, for clarity of explanation, parts that are not relevant in describing the embodiments can not be shown.

[0038] For clarity, relative dimensions of the elements, layers, and regions in the drawings can be exaggerated. Moreover, the use of shading and / or line styles in the drawings is generally for illustrative purposes and does not indicate relative size or importance of the elements, layers, and regions depicted. For example, the use of shading and / or line styles in the drawings is not intended to convey any preference for particular material, material properties, dimensions, ratios, commonality, and / or any other characteristic, attribute, property, etc. of the elements, layers, and regions illustrated in the drawings.

[0039] Various embodiments are described herein with reference to cross-sectional illustrations that are schematic illustrations of exemplary embodiments and / or intermediate structures for purposes of explaining various embodiments and / or aspects thereof. Thus, as such, the dimensions of the various features in the drawings can be exaggerated relative to other features, for clarity. Further, the specific structural and functional details disclosed herein are merely representative for purposes of describing and illustrating the embodiments of this disclosure. Thus, the embodiments disclosed in this specification are not limited to the specific examples described herein, but can include any alternatives, modifications, equivalents, etc. within the spirit and / or scope of this disclosure.

[0040] The regions illustrated in the figures are intended to be schematic and are not necessarily drawn to scale. Furthermore, the embodiments described herein can be modified in various ways and can be implemented in different ways without departing from the spirit or scope of the present disclosure.

[0041] Numerous specific details are presented herein in order to provide a thorough understanding of the various embodiments. However, in cases of specific details, one or more embodiments can well not be an actual implementation and thus, can include well fabricating processes including one or more of such embodiments. In other instances, well-known structures and devices are shown in block diagram form in order to avoid unnecessarily obscuring the embodiments.

[0042] As illustrated in the figures, spatially relative terms, such as "under", "above", "lower", "upper", and the like, can be used herein for ease of description to describe one element or feature's relationship to another element(s) or feature(s) as illustrated in the figures. The spatially relative terms are intended to encompass different orientations of the device in use or operation in addition to the orientations depicted in the figures. For example, if a device in the figures is turned over, elements described as "below" or "beneath" other elements or features would then be oriented "above" the other elements or features. Thus, the exemplary term "below" can encompass both an orientation of above and below. The device can be otherwise oriented (e.g., rotated 90° or at other orientations) and the spatially relative descriptors used herein interpreted accordingly. Similarly, when a first part is stated to be "above" a second part, it can mean that the first part is above or below the second part.

[0043] Furthermore, the expression "from plan view" means the case where an object is viewed from above, and the expression "in an approximate cross-sectional view" means the case where an object is cut vertically or horizontally to obtain a substantially cross-section. The term "as viewed from the side" means that a first object can be above, below, or beside a second object, or vice versa. Furthermore, the term "overlap" can include layer, stack, face, extend over, cover, or partially cover, or any other suitable term as would be appreciated and understood by one of ordinary skill in the art. The expression "not overlap" can include the meaning such as "isolate" or "separate" as well as any other suitable equivalent meaning as recognized and understood by one of ordinary skill in the art. The term "face" can mean that a first object can directly or indirectly face a second object. When there is a third object between the first object and the second object, it can be understood that the first object and the second object face each other, but indirectly face each other.

[0044] It will be understood that when an element, layer, region or a component is referred to as being "formed on", "connected to" or "coupled to" another element, layer, region or component, it can be directly formed on, connected to or coupled to another element, layer, region or component, or indirectly formed on, connected to or coupled to another element, layer, region or component, such that one or more intervening elements, layers, regions or components can exist. In addition, "formed in", "connected to" or "in combination with" can collectively refer to integral or non-integral combination or connection using direct or indirect combination or connection of elements, layers, regions or components, such that one or more elements, layers, regions or components can exist. For example, when a layer, region or component is referred to as being "electrically connected" or "electrically coupled" to another layer, region or component, it can be directly electrically connected or coupled to another layer, region and / or component, or there can be an intervening layer, region or component. However, "directly connected to" or "in direct combination with" means that a component is directly connected or combined with another component without an intervening component, or the former is on the latter. In addition, in the present disclosure, when a part of a layer, film, region, guide plate, etc. is formed on another part, the formation direction is not limited to the upward direction, and includes the case where the part is formed on the side or bottom. Conversely, when a part of a layer, film, region, guide plate, etc. is formed "under" another part, this includes not only the case where the part is "directly under" another part, but also the case where there is yet another part between the part and another part. Meanwhile, other expressions describing the relationship between components such as "between", "directly between", or "adjacent to" and "directly adjacent to" can be similarly interpreted. In addition, it will also be understood that when an element or layer is referred to as being "between" two elements or layers, it can be the only element or layer between the two elements or layers, or there can be one or more intervening elements or layers.

[0045] For purposes of the present disclosure, expressions such as "at least one of," "one or more of," and "at least a variant of" are used to include any singular entity or combination of two or more entities. For example, "at least one of X, Y, and Z" or "one or more of X, Y, and Z" can include X alone, Y alone, Z alone, or a combination of any two or more of X, Y, and Z. Similarly, "at least one of A and B" or "at least one of A or B" can include A, B, or both A and B. In the present disclosure, the term "and / or" generally includes all combinations of one or more relevant items listed. For example, the expression "A and / or B" can include A, B, or both A and B.

[0046] Although the terms "first," "second," "third," etc. can be used herein to describe various elements, components, regions, layers, and / or sections, these elements, components, regions, layers, and / or sections are not limited by these terms. These terms are used to distinguish one element, component, region, layer, or section from another element, component, region, layer, or section. Thus, a first element, component, region, layer, or section described below could be termed a second element, component, region, layer, or section, without departing from the spirit and scope of the present disclosure. Describing an element as "first" does not require or imply the presence of a second element or other elements. The terms such as "first," "second," etc. can be used in the present disclosure to distinguish between different categories or groups of elements. For clarity, the terms "first," "second," etc. can be used to denote "first category (or group)," "second category (or group)," etc.

[0047] The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the present disclosure. As used in the present disclosure, singular forms "a," "an," and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise. It will be further understood that the terms "comprises," "comprising," "includes," and "including," when used in this specification, specify the presence of stated features, integers, steps, operations, elements, and / or components, but do not preclude the presence or addition of one or more other features, integers, steps, operations, elements, components, and / or groups thereof.

[0048] When one or more embodiments can be implemented differently, a specific process sequence can be performed differently from the described sequence. For example, two processes described in succession can be performed simultaneously (or substantially simultaneously), or can be performed in an order opposite to the described sequence.

[0049] The terms "substantially," "about," "approximately," and the like are used as terms of approximation and not as terms of degree, and are intended to account for the inherent variations in a measurement or calculation that would be expected by those of ordinary skill in the art given the nature of the measurement or calculation. For example, "about" can mean within one or more standard deviations, or within ±30%, ±20%, ±10%, or ±5% of a specified value.

[0050] Unless otherwise defined, all terms used in disclosing aspects of the disclosure, including technical or scientific terms, have the same meaning as commonly understood by one of ordinary skill in the art to which the disclosure belongs. The terminology used herein should be interpreted as having a meaning that is consistent with its meaning in the context of the relevant art and the present disclosure, and will not be interpreted in an idealized or overly formal sense unless specifically so defined herein.

[0051] Figure 1 Illustrating one side of a battery pack 10 according to some embodiments of the disclosure. Figure 2 Illustrating the other side of a battery pack 10 according to some embodiments of the disclosure. Figure 3 Is an exploded view of a battery cell 100 and a protection circuit module 200 according to some embodiments of the disclosure. Figure 4 Illustrating a battery cell 100 according to some embodiments of the disclosure. Figure 5 Is an exploded view of a first attachment cover 300, a second attachment cover 400, and a release cover 500 according to some embodiments of the disclosure. Figure 6 Illustrating a first attachment cover 300 and a second attachment cover 400 according to some embodiments of the disclosure. Figure 7 Illustrating a release cover 500 according to some embodiments of the disclosure. Figure 8 And Figure 9 Illustrating a state in which a first attachment cover 300, a second attachment cover 400, and a release cover 500 are attached to a battery cell 100 according to some embodiments of the disclosure. Figure 10 Illustrating a state in which a release cover 500 is removed from a battery cell 100 according to some embodiments of the disclosure.

[0052] A battery pack 10 can include a battery cell 100 that is a pouch-type battery, a protection circuit module 200, a first attachment cover 300, a second attachment cover 400, and a release cover 500. As Figure 1 shown, the battery pack 10 can have at least one surface (e.g., a surface parallel to the X-Y plane of Figure 1 ) in a flat uniform shape. At least a portion of the battery pack 10 can have a curved shape. The battery pack 10 can have two side surfaces (e.g., Figure 1The battery pack 10 can include one or more straps and a protection circuit module 200 for supporting and protecting the battery cell 100. The one or more straps are located on at least one of the battery cell 100 and the protection circuit module 200, and can contain an insulating material.

[0053] The battery pack 10 can include: a battery cell 100; a first attachment cover 300 surrounding a portion of the battery cell 100 and attachable to and detachable from the battery cell 100; a second attachment cover 400 surrounding another portion of the battery cell 100 at a different location from the first attachment cover 300 and attachable to and detachable from the battery cell 100; and a release cover 500 covering at least a portion of the first attachment cover 300 and at least a portion of the second attachment cover 400 and attachable to and detachable from the first attachment cover 300 and the second attachment cover 400.

[0054] The battery cell 100 can include an electrode assembly 110, an electrode tab 120, and a case P.

[0055] The battery pack 10 can include: a battery cell 100 including an electrode assembly 110 and an electrode tab 120 extending from the electrode assembly 110; and a protection circuit module 200 including a substrate 210 and a substrate tab 230 located on the substrate 210 and connected to the electrode tab 120.

[0056] As shown in FIG. 1, the electrode assembly 110 can include a first electrode plate 111 and a second electrode plate 112 having opposite polarities to each other and a separator 113 between the first electrode plate 111 and the second electrode plate 112. The electrode assembly 110 can be formed in a jelly-roll type by winding the first electrode plate 111, the second electrode plate 112, and the separator 113. The electrode assembly 110 can have a winding axis parallel to a longitudinal direction (e.g., a Y-axis direction) of the battery cell 100. Alternatively, the electrode assembly 110 can be formed in a stack type by stacking a plurality of the first electrode plate 111, the second electrode plate 112, and the separator 113. Alternatively, the electrode assembly 110 can include a mixture of the jelly-roll type and the stack type configuration. The first electrode plate 111 can be a negative electrode, and the second electrode plate 112 can be a positive electrode. Alternatively, the first electrode plate 111 can be a positive electrode, and the second electrode plate 112 can be a negative electrode. Figure 3 Figure 3

[0057] ​​The first electrode plate 111 can be formed by coating a first electrode active material such as graphite or carbon to a first electrode current collector plate formed of a metal foil such as copper, copper alloy, nickel, or nickel alloy. The first electrode plate 111 can include a first uncoated portion that is a region to which the first electrode active material is not coated, and at least a portion of the first uncoated portion can include a first electrode tab 121. The first electrode tab 121 can be a path for current flow between the first electrode plate 111 and the first electrode current collector plate. When the first electrode plate 111 is manufactured, the first electrode tab 121 can be formed by a cutting process such that at least a portion of the first electrode plate 111 protrudes to the outside of the electrode assembly 110 in advance. Alternatively, without a separate cutting process, the first electrode tab 121 can protrude further to the outside of the electrode assembly 110 than the separator 113.

[0058] The second electrode plate 112 can be formed by coating a second electrode active material such as a transition metal oxide to a second electrode current collector plate formed of a metal foil such as aluminum or aluminum alloy. The second electrode plate 112 can include a second uncoated portion that is a region to which the second electrode active material is not coated, and at least a portion of the second uncoated portion can include a second electrode tab 122. The second electrode tab 122 can be a path for current flow between the second electrode plate 112 and the second electrode current collector plate. When the second electrode plate 112 is manufactured, the second electrode tab 122 can be formed by a cutting process such that at least a portion of the second electrode plate 112 protrudes to the outside of the electrode assembly 110 in advance. Alternatively, without a separate cutting process, the second electrode tab 122 can protrude further to the outside of the electrode assembly 110 than the separator 113.

[0059] The electrode assembly 110 can be surrounded by a case P. As Figure 3 shown, the electrode assembly 110 can have a size smaller than that of the case P and can be located inside the case P to be connected to the protection circuit module 200 through the electrode tab 120.

[0060] The electrode tab 120 can be connected to the electrode assembly 110. The electrode tab 120 can be electrically connected to the electrode assembly 110, can be drawn out from the case P surrounding the electrode assembly 110, and can be drawn out from the platform portion T of the case P. As Figure 3As shown, the electrode tabs 120 can include first and second electrode tabs 121 and 122 having different polarities, and the first and second electrode tabs 121 and 122 can be electrically connected to the first and second electrode plates 111 and 112, respectively. In addition, the electrode tabs 120 can be connected to the substrate tabs 230. For example, the first electrode tab 121 can be connected to the first substrate tab 231, and the second electrode tab 122 can be connected to the second substrate tab 232. The electrode tabs 120 can be connected to the substrate tabs 230 by welding, bolting, or the like.

[0061] The insulation tape 130 can be attached to the electrode tabs 120 to provide insulation and sealing between the electrode tabs 120 and the case P. As shown, the insulation tape 130 can be located on a side of the electrode tabs 120 close to the electrode assembly 110. One side of the insulation tape 130 can be in contact with the electrode assembly 110. Figure 3

[0062] The first and second electrode tabs 121 and 122 can be on the same surface of the electrode assembly 110. As shown, the first and second electrode tabs 121 and 122 can be on one surface perpendicular to the winding axis of the electrode assembly 110 (e.g., the surface facing the protection circuit module 200). Figure 3 Figure 3 Alternatively, the first and second electrode tabs 121 and 122 can be on different surfaces of the electrode assembly 110. The first and second electrode tabs 121 and 122 are spaced apart from each other and can be welded and electrically connected to the first and second electrode current collector plates, respectively.

[0063] The case P can contain a flexible outer material such as a pouch. The case P can include an insulation layer formed on either surface of a thin metal layer such as aluminum, and can be formed by a forming process such as drawing. The case P can include first and second cases P1 and P2 facing each other with the electrode assembly 110 therebetween. Each of the first and second cases P1 and P2 includes an inner space, and the other of the first and second cases P1 and P2 can cover the electrode assembly 110 after the electrode assembly 110 is seated in the inner space of one of the first and second cases P1 and P2. The first and second cases P1 and P2 can have the same or different sizes and shapes.

[0064] ​​The case P can include a folding portion P3 that folds the first case P1 and the second case P2 to overlap each other. The first case P1 and the second case P2 can be folded in directions facing each other about the folding portion P3 to form the case P that accommodates the electrode assembly 110. The first case P1 and the second case P2 can be folded to each other by the folding portion P3. As shown in Figure 3 In a state in which the first case P1 and the second case P2 have been folded about the folding portion P3, each of the first case P1 and the second case P2 can include a sealing portion TS for sealing the accommodation portion A, in addition to the accommodation portion A that accommodates the electrode assembly 110. The sealing portion TS can be formed along an outer periphery of the accommodation portion A to seal the accommodation portion A that accommodates the electrode assembly 110. The sealing portion TS can be formed along the remaining corners of the case P, except for the corner of the case P in which the folding portion P3 is formed. The case P can have a substantially rectangular parallelepiped shape by folding the first case P1 and the second case P2. Also, the sealing portion TS can be continuously formed along the other short side portions and the long side portions, except for the short side portion in which the folding portion P3 is formed.

[0065] The sealing portion TS can include a platform portion T from which the electrode tabs 120 electrically connected to the electrode assembly 110 are drawn, and a side sealing portion S that is in contact with the platform portion T and extends in a direction crossing the platform portion T. As shown in Figure 3 The platform portion T can be formed at one short side portion of the case P, and the side sealing portion S can be formed at either side portion of a pair of long side portions of the case P. The platform portion T can seal the accommodation portion A while extending in a direction crossing the electrode tabs 120, and the side sealing portion S can seal the accommodation portion A while extending in a direction crossing the platform portion T. The platform portion T and the side sealing portion S can form the sealing portion TS that continuously extends in contact with each other and seals the accommodation portion A together.

[0066] The sealing portion TS can be formed by folding the first case P1 and the second case P2 in directions facing each other. The sealing portion TS can have one surface of the first case P1 and one surface of the second case P2 as outer surfaces, and can include a sealing surface B that is an inner surface of the first case P1 and the second case P2 at a portion where the two surfaces are in contact with each other. The platform portion T of the sealing portion TS can include a first surface T1 of the first case P1 and a second surface T2 of the second case P2, and can include a sealing surface B that is an inner surface of the first case P1 and the second case P2 at a portion where the first surface T1 and the second surface T2 are in contact with each other.

[0067] The first housing P1 and the second housing P2 can include a first accommodation portion A1 and a second accommodation portion A2, respectively, which accommodate different portions of the electrode assembly 110. The accommodation portion A that accommodates the electrode assembly 110 can be provided by coupling the first housing P1 and the second housing P2 to each other. For example, the accommodation portion A that accommodates the electrode assembly 110 can be formed by connecting the first accommodation portion A1 of the first housing P1 and the second accommodation portion A2 of the second housing P2 to each other.

[0068] As Figure 4 illustrated, the side sealing portion S is located on both sides in the width direction (for example, the X-axis direction) of the battery cell 100 and can be folded upward. The pair of side sealing portions S can be folded in one direction (for example, a direction toward the upper surface of the battery cell 100 or the Z-axis direction).

[0069] The battery cell 100 can include a first surface FS and a second surface BS opposite the first surface FS. As Figure 4 illustrated, in a state in which the first housing P1 and the second housing P2 are coupled to each other, the surface of the first housing P1 of the battery cell 100 that faces the outside can be the first surface FS, and the surface of the second housing P2 that faces the outside can be the second surface BS. In the battery cell 100, the housing P can include a short side portion SS and a long side portion LS. As Figure 4 illustrated, in a state in which the first housing P1 and the second housing P2 are coupled to each other, the two long edges can become the long side portion LS, and the two short edges can become the short side portion SS. As Figure 4 illustrated, the long side portion LS can mean the two long edges of the housing P in a state in which the side sealing portion S is folded toward the housing P. The pair of long side portions LS and the pair of short side portions SS can be connected to the first surface FS and the second surface BS at different positions.

[0070] Referring back to Figure 3 , the protection circuit module 200 can control charging and discharging operations of the battery cell 100 to prevent or reduce overdischarge and overcharge of the battery cell 100. The protection circuit module 200 can be connected to the battery cell 100 through the electrode tab 120. As Figure 1 and Figure 3 illustrated, the protection circuit module 200 can be located above the electrode tab 120 of the battery cell 100 that protrudes.

[0071] The protection circuit module 200 can include a substrate 210, a connector 220, and a substrate tab 230.

[0072] The substrate 210 can include a circuit and various devices. The substrate 210 can be connected to the electrode tab 120 in one direction (for example, Figure 3The substrate 210 has an elongated shape in the X-axis direction or the width direction of the battery cell 100. The substrate 210 is a printed circuit board, and at least a portion thereof may contain a flexible material.

[0073] Connector 220 allows the substrate 210 to be connected to an external device (e.g., a battery monitoring system (BMS)). Figure 1 and Figure 3 As shown, connector 220 can be located at the end portion of substrate 210 in the longitudinal direction. Connector 220 can be located in a direction intersecting the longitudinal direction of substrate 210 (e.g., the longitudinal direction of battery cell 100 or...). Figure 3 It extends in the Y-axis direction and may include terminals for connection to external devices.

[0074] At least one substrate terminal block 230 may be located on the substrate 210 and connected to the electrode terminal block 120. At least one substrate terminal block 230 includes a conductor that can be electrically connected to the electrode terminal block 120, and may contain, for example, nickel, copper, aluminum, etc. Figure 3 As shown, two substrate terminals 230 can be located on the top surface of substrate 210 and can be spaced apart from each other. The number of substrate terminals 230 can be the same as the number of electrode terminals 120. The substrate terminals 230 can be located at positions corresponding to the electrode terminals 120 and can be connected to the electrode terminals 120 by soldering or the like to electrically connect the battery cell 100 to the protection circuit module 200. The substrate terminals 230 may include a first substrate terminal 231 connected to the first electrode terminal 121 and a second substrate terminal 232 connected to the second electrode terminal 122.

[0075] The first attachment cover 300 can be attached to and detached from the battery cell 100, and can surround a portion of the battery cell 100. The first attachment cover 300 can be a film comprising materials such as polyethylene terephthalate (PET) or thermoplastic polyurethane (TPU). The first attachment cover 300 can be in at least one direction (e.g., the width direction of the battery cell 100 or...). Figure 1 The first attachment cover 300 may have a dimension larger than the size of the first surface FS or the second surface BS of the battery cell 100 in the X-axis direction. The first attachment cover 300 may surround at least a portion of the first surface FS and at least a portion of the second surface BS of the battery cell 100. Figure 1 and Figure 2 As shown, the first attachment cover 300 may surround the entire second surface BS of the battery cell 100 and a portion of the first surface FS of the battery cell 100.

[0076] The first attachment cover 300 may surround one or more corners of the battery cell 100. For example... Figure 1 andFigure 2 As illustrated, the first attachment cover 300 can at least partially surround each of the two long sides LS while attached to the battery cell 100. A portion of the first surface FS can be exposed to the outside while the first attachment cover 300 is attached to the battery cell 100.

[0077] The first attachment cover 300 may have each of the pair of long sides LS in the width direction of the battery cell 100 (e.g., Figure 1 Different lengths extending along the X-axis direction. For example... Figure 1 As shown, the length of the first attachment cover 300 extending toward the inside of the battery cell 100 in the width direction at the position corresponding to the left long side of the pair of long sides LS can be longer than the length of the first attachment cover 300 extending toward the inside of the battery cell 100 in the width direction at the position corresponding to the right long side of the pair of long sides LS.

[0078] The first attachment cover 300 may have an adhesive material applied to the surface facing the battery cell 100. The adhesive material has a weak adhesive strength, which allows a user to attach and remove the first attachment cover 300 to and from the battery cell 100 by hand, and allows the first attachment cover 300 to and from the battery cell 100 repeatedly.

[0079] refer to Figure 5 The first attachment cover 300 may include an inner region 310, a wing 320, an opening 330, an edge region 340, a first outer region 350, a second outer region 360, and a protrusion 370.

[0080] The inner region 310 may contact one surface of the battery cell 100 (e.g., the second surface BS). Figure 5 As shown, the inner region 310 may have a size and shape corresponding to the second surface BS of the battery cell 100. The inner region 310 may be attached to the second surface BS of the battery cell 100 to support other components of the first attachment cover 300, such as the wing 320, opening 330, edge region 340, first outer region 350, second outer region 360, and protrusion 370. The inner region 310 may be connected to the first outer region 350 and the second outer region 360. The first outer region 350 may be connected to either of the pair of long sides LS of the inner region 310 (e.g., Figure 5 The edge corresponding to the right long side portion LS or the long side portion LS positioned opposite to the second attachment cover 400. Furthermore, the second outer region 360 can be connected to the inner region 310 corresponding to the other of the pair of long sides (e.g., Figure 5 The other edge corresponding to the left long side portion LS or the long side portion LS that overlaps with the second attachment cover 400.

[0081] The wing 320 may surround a portion of the battery cell 100. The wing 320 may surround a portion of the first surface FS of the battery cell 100. The wing 320 is connected to the second outer region 360 and may be attached to the first surface FS together with the second attachment cover 400. The outer surface of the wing 320 contacts the release cover 500, and a portion of the wing 320 may be located inside the release cover 500, and another portion may be located outside the release cover 500. Here, inside and outside may refer to the planar direction (e.g., Figure 5 (The X-axis and / or Y-axis directions in the image). For example... Figure 5 As shown, the outer end portion and the top tip of the wing 320 are located inside the release cover 500 in the width direction of the battery cell 100, and can be relatively stably guided and attached to the first surface FS of the battery cell 100 through the release cover 500. Furthermore, the bottom end of the wing 320 is located outside the release cover 500, allowing the former to function as an indicator for checking the attachment position of the wing 320.

[0082] Opening 330 is an empty area of ​​the first attachment cover 300, and may be an area where the second attachment cover 400 is positioned. Opening 330 extends across the inner area 310, the wing 320, and the second outer area 360, and may be adjacent to either of a pair of long sides LS. Figure 5 As shown, opening 330 can correspond to the long side portion LS adjacent to wing 320. The shape of opening 330 is not particularly limited and can be circular, elliptical, or a polygon such as a triangle or rectangle. Figure 5 As shown, the opening 330 may have a rectangular shape that is elongated in the longitudinal direction of the battery cell 100. A pair of long sides of the opening 330 may be located in the inner region 310 and the wing 320, and each of its pair of short sides may extend across the inner region 310, the wing 320 and the second outer region 360.

[0083] Edge region 340 is a region extending along the edge of opening 330 and may extend to include opening 330 or a second attachment cover 400 within opening 330. Similar to opening 330, edge region 340 is an empty region of first attachment cover 300, and the region of opening 330 where the second attachment cover 400 is positioned may be spaced apart from regions such as inner region 310, wing 320, and second outer region 360 to form a boundary. Optionally, edge region 340 is a region for supporting the second attachment cover 400, and adhesive material is applied to the inner surface of edge region 340 (e.g., the surface facing battery cell 100) such that the edge of the second attachment cover 400 can be attached thereto. Release cap 500 may cover edge region 340.

[0084] The first outer region 350 is connected to the inner region 310 and can surround any one of a pair of long sides LS of the battery cell 100. As shown in Figure 5 and Figure 9 The first outer region 350 can surround the long side LS located at the opposite side of the opening 330 or the second outer region 360. A portion of the first outer region 350 can surround the side surface of the battery cell 100 corresponding to the long side LS, and another portion of the first outer region 350 can surround the first surface FS. The first outer region 350 can be attached to the long side LS and the first surface FS of the battery cell 100. When the first attachment cover 300 is attached to the battery cell 100 or the second attachment cover 400 or the release cover 500 is separated from the battery cell 100, the first outer region 350 can be configured so that the first attachment cover 300 is not separated from or deviated from the battery cell 100.

[0085] The second outer region 360 is connected to the inner region 310 and can surround any one of a pair of long sides LS of the battery cell 100. As shown in Figure 5 and Figure 9 The second outer region 360 can surround the long side LS located at the opposite side of the first outer region 350. A portion of the second outer region 360 can surround the side surface of the battery cell 100 corresponding to the long side LS, and another portion of the second outer region 360 can surround the first surface FS. The second outer region 360 can be attached to the long side LS and the first surface FS of the battery cell 100. When the first attachment cover 300 is attached to the battery cell 100 or the second attachment cover 400 or the release cover 500 is separated from the battery cell 100, the second outer region 360 can be configured so that the first attachment cover 300 is not separated from or deviated from the battery cell 100.

[0086] The protrusion 370 can be attached to the short side SS of the battery cell 100 to support the first attachment cover 300 to the battery cell 100. The protrusion 370 can include a plurality of protruding portions. For example, as shown in Figure 5 The protrusion 370 can include first protruding portions 371 located at the top ends of the first outer region 350 and the second outer region 360, respectively, and second protruding portions 372 located at the bottom ends of the first outer region 350 and the second outer region 360, respectively. Each of the first protruding portions 371 can be attached to the upper short side SS of a pair of short sides SS, and each of the second protruding portions 372 can be located on the lower short side SS of the pair of short sides SS. When the first outer region 350 and the second outer region 360 are attached to the pair of long sides LS, the first protruding portions 371 and the second protruding portions 372 can be folded toward the short side SS and then attached to the short side SS.

[0087] The second attachment cover 400 can be attached to and detached from the battery cell 100, and can surround a portion of the battery cell 100. For example, the second attachment cover 400 can be a thin film of the same material as that of the first attachment cover 300 or a different material, such as PET or TPU. The second attachment cover 400 can have a size smaller than that of the first surface FS or the second surface BS of the battery cell 100 in at least one direction (e.g., the X-axis direction of the battery cell 100). The second attachment cover 400 can surround at least a portion of the first surface FS and at least a portion of the second surface BS of the battery cell 100. As shown in FIGS. 4A and 4B, the second attachment cover 400 can surround a portion of the second surface BS of the battery cell 100, and can surround a portion of the first surface FS of the battery cell 100. Figure 1 The second attachment cover 400 can surround at least a portion of the first surface FS of the battery cell 100. The second attachment cover 400 can surround at least a portion of the second surface BS of the battery cell 100. The second attachment cover 400 can surround at least a portion of the first surface FS and at least a portion of the second surface BS of the battery cell 100. Figure 1 The second attachment cover 400 can surround at least a portion of the first surface FS of the battery cell 100. The second attachment cover 400 can surround at least a portion of the second surface BS of the battery cell 100. The second attachment cover 400 can surround at least a portion of the first surface FS and at least a portion of the second surface BS of the battery cell 100. Figure 2 The second attachment cover 400 can surround at least a portion of the first surface FS of the battery cell 100. The second attachment cover 400 can surround at least a portion of the second surface BS of the battery cell 100. The second attachment cover 400 can surround at least a portion of the first surface FS and at least a portion of the second surface BS of the battery cell 100. The second attachment cover 400 can surround at least a portion of the first surface FS of the battery cell 100. The second attachment cover 400 can surround at least a portion of the second surface BS of the battery cell 100. The second attachment cover 400 can surround at least a portion of the first surface FS and at least a portion of the second surface BS of the battery cell 100.

[0088] The second attachment cover 400 can surround at least a portion of the first surface FS of the battery cell 100. The second attachment cover 400 can surround at least a portion of the second surface BS of the battery cell 100. The second attachment cover 400 can surround at least a portion of the first surface FS and at least a portion of the second surface BS of the battery cell 100. Figure 5 The second attachment cover 400 can surround at least a portion of the first surface FS of the battery cell 100. The second attachment cover 400 can surround at least a portion of the second surface BS of the battery cell 100. The second attachment cover 400 can surround at least a portion of the first surface FS and at least a portion of the second surface BS of the battery cell 100. The second attachment cover 400 can surround at least a portion of the first surface FS of the battery cell 100. The second attachment cover 400 can surround at least a portion of the second surface BS of the battery cell 100. The second attachment cover 400 can surround at least a portion of the first surface FS and at least a portion of the second surface BS of the battery cell 100.

[0089] The second attachment cover 400 can surround at least a portion of the first surface FS of the battery cell 100. The second attachment cover 400 can surround at least a portion of the second surface BS of the battery cell 100. The second attachment cover 400 can surround at least a portion of the first surface FS and at least a portion of the second surface BS of the battery cell 100. Figure 5 The second attachment cover 400 can surround at least a portion of the first surface FS of the battery cell 100. The second attachment cover 400 can surround at least a portion of the second surface BS of the battery cell 100. The second attachment cover 400 can surround at least a portion of the first surface FS and at least a portion of the second surface BS of the battery cell 100. The second attachment cover 400 can surround at least a portion of the first surface FS of the battery cell 100. The second attachment cover 400 can surround at least a portion of the second surface BS of the battery cell 100. The second attachment cover 400 can surround at least a portion of the first surface FS and at least a portion of the second surface BS of the battery cell 100.

[0090] The second attachment cover 400 can have an adhesive material applied to a surface facing the battery cell 100. The adhesive material has a weak adhesive strength, which allows a user to attach and detach the second attachment cover 400 to the battery cell 100 by hand, and allows the second attachment cover 400 to be repeatedly attached to and detached from the battery cell 100.

[0091] The first attachment cover 300 and the second attachment cover 400 can be used to separate the battery pack 10 from an application (e.g., a smart phone, a battery charging device, etc.). For example, when a user separates and pulls the second attachment cover 400 attached to the first surface FS while the first attachment cover 300 and the second attachment cover 400 are attached to the battery cell 100, the battery cell 100 can be separated from the application through the second attachment cover 400 attached to the second surface BS.

[0092] The first attachment cover 300 and the second attachment cover 400 can be at the same level. As shown, one of the first attachment cover 300 and the second attachment cover 400 can not be positioned above or below the other, but can be at the same level. Figure 5

[0093] The release cover 500 overlaps at least a portion of the first attachment cover 300 and the second attachment cover 400, and allows the first attachment cover 300 and the second attachment cover 400 to be relatively stably attached to the battery cell 100. The release cover 500 can be attached to and detachable from the first attachment cover 300 and the second attachment cover 400. A portion of the release cover 500 can be positioned on the second surface BS of the battery cell 100, and another portion of the release cover 500 can be positioned on any one of the pair of long sides LS and the first surface FS of the battery cell 100 to cover a portion of the first attachment cover 300 and the second attachment cover 400. Further, the release cover 500 can cover the entire opening 330 and the entire second attachment cover 400, such that the opening 330 is positioned inside. Accordingly, the release cover 500 can relatively stably support the first attachment cover 300 and the second attachment cover 400 when the first attachment cover 300 and the second attachment cover 400 are attached to the battery cell 100. Further, when the second attachment cover 400 positioned inside the opening 330 is attached to the battery cell 100, the release cover 500 covers the entire opening 330 and the entire second attachment cover 400, such that an attachment quality is not deteriorated, such as wrinkling. Further, another portion of the release cover 500 does not overlap the battery cell 100 or the first attachment cover 300 and the second attachment cover 400, and can protrude outside any one of the pair of short sides SS of the battery cell 100.

[0094] ​The release cover 500 can be at a level different from that of the first and second attachment covers 300 and 400. For example, the release cover 500 can be located on surfaces of the first and second attachment covers 300 and 400 opposite the surfaces facing the battery cell 100. The release cover 500 can be located on outer surfaces of the first and second attachment covers 300 and 400 when the first and second attachment covers 300 and 400 are attached to the battery cell 100.

[0095] As shown in FIG. 10, when the release cover 500 is located on the first and second attachment covers 300 and 400, a portion of the first attachment cover 300 can be located inside the release cover 500, another portion can be located outside the release cover 500, and the second attachment cover 400 can be located entirely inside the release cover 500. Figure 5

[0096] The release cover 500 can include a first region 510 and a second region 520. The first region 510 is a portion surrounding the battery cell 100 (e.g., the first surface FS or the second surface BS of the battery cell 100) and can overlap the first and second attachment covers 300 and 400. The first region 510 can cover at least a portion of the first attachment cover 300 and at least a portion of the second attachment cover 400.

[0097] Because the adhesive material G2 is applied to the surface facing the battery cell 100, the first region 510 can be attached to the first and second attachment covers 300 and 400. The adhesive material G2 can be a material having an adhesive force weaker than that of the adhesive material G1. Accordingly, when the release cover 500 is separated from the battery cell 100, it can be possible to prevent or reduce a case in which the first and second attachment covers 300 and 400 are separated from the battery cell 100.

[0098] The adhesive material G2 can not be applied to the second region 520. That is, the first region 510 can be an adhesive region in which the adhesive material G2 is applied to the surface facing the battery cell 100 to be adhered to the battery cell 100, and the second region 520 can be a non-adhesive region in which the adhesive material G2 is not applied to the surface facing the battery cell 100 and thus is not adhered to the battery cell 100. Accordingly, it can be possible to separate the release cover 500 from the first and second attachment covers 300 and 400 by pulling the second region 520. As shown in FIG. 10, in a state in which the first and second attachment covers 300 and 400 and the release cover 500 are attached to the battery cell 100, the second region 520 can be a region not overlapping the battery cell 100. Figure 8

[0099] ​​The second region 520 can extend from the first region 510 toward any one of the pair of short sides SS. For example, the second region 520 extends toward the short side SS of the pair of short sides SS at a position corresponding to the protection circuit module 200 (e.g., the short side SS of the pair of short sides SS located above) and can be further outwardly protruded than the short side SS.

[0100] Before being attached to the battery cell 100, the first attachment cover 300, the second attachment cover 400, and the release cover 500 can be attached to separate release papers. For example, the first attachment cover 300, the second attachment cover 400, and the release cover 500 have one or more release papers attached to surfaces coated with the adhesive material G1, G2, and the first attachment cover 300, the second attachment cover 400, and the release cover 500 can be attached to the battery cell 100 after the one or more release papers are separated.

[0101] Reference Figures 8 to 10 is described. For reference, although the protection circuit module 200 is not shown in the battery cell 100 in order to facilitate the description in Figures 8 to 10 , the protection circuit module 200 can be connected to the battery cell 100.

[0102] First, the first attachment cover 300, the second attachment cover 400, and the release cover 500 are prepared. In this state, the release cover 500 can be attached to outer surfaces (e.g., surfaces opposite to surfaces facing the battery cell 100) of the first attachment cover 300 and the second attachment cover 400. In addition, one or more release papers can be attached to inner surfaces of the first attachment cover 300 and the second attachment cover 400.

[0103] Next, the first attachment cover 300 is attached to the second surface BS Figure 8 of the battery cell 100. When the release paper is attached to the first attachment cover 300, the second surface BS of the battery cell 100 is attached to the surface of the first attachment cover 300 coated with the adhesive material G1 after the release paper is removed. For example, the second surface BS can be attached to the inner region 310. In addition, even a portion of the second attachment cover 400 can be attached to the second surface BS.

[0104] Next, the first attachment cover 300 is attached to the first surface FS Figure 9 of the battery cell 100. For example, the release cover 500 can be folded toward the first surface FS to attach the first attachment cover 300 and the second attachment cover 400 attached to the release cover 500 to the first surface FS at the same time. Accordingly, as Figure 9As illustrated, a portion of the second attachment cover 400 and the second outer region 360 can surround any one long side LS of the battery cell 100, and another portion of the second attachment cover 400 and the wing portion 320 can be attached to the first surface FS. Also, the first outer region 350 can surround the other long side LS of the battery cell 100. The operation of attaching the first outer region 350 to the long side LS and the operation of attaching the second outer region 360 to the long side LS can be performed simultaneously, or either operation can be performed first.

[0105] Also, the protrusions 370 are attached to the short side SS of the battery cell 100. For example, a pair of first protrusion portions 371 are attached to the short side SS above the battery cell 100, and a pair of second protrusion portions 372 are attached to the short side SS below the battery cell 100.

[0106] Next, the release cover 500 is removed ( Figure 10 ). The release cover 500 can be removed from the first attachment cover 300 and the second attachment cover 400 by pulling a portion of the release cover 500. For example, the release cover 500 can be removed by pulling the second region 520 to which the adhesive material G2 is not applied.

[0107] Also, the battery pack 10 can be inserted into the application while the release cover 500 is removed. Thereafter, when the battery pack 10 is repositioned or removed, a portion of the second attachment cover 400 can be separated from the battery cell 100 and then pulled to remove the battery pack 10 from the application.

[0108] The battery pack 10 can be easily separated from the application and repositioned by the first attachment cover 300 and the second attachment cover 400. Also, when the first attachment cover 300 and the second attachment cover 400 are attached to the battery cell 100 by the release cover 500 that supports the first attachment cover 300 and the second attachment cover 400, the battery pack 10 can prevent or reduce a case in which the second attachment cover 400 is misaligned with respect to the first attachment cover 300 or attached to the battery cell 100 with wrinkles.

[0109] With the first attachment cover and the second attachment cover, the battery pack can be easily removed from the application and repositioned. Also, the release cover supports the first attachment cover and the second attachment cover, thereby preventing or reducing a case in which the second attachment cover is misaligned with the first attachment cover or attached to the battery cell with wrinkles when the first attachment cover and the second attachment cover are attached to the battery cell.

[0110] However, the features according to embodiments of the present disclosure are not limited to the above-described features, and other features not mentioned can be more clearly understood by those skilled in the art through the description of the present disclosure.

[0111] It is to be understood that the embodiments described herein are to be considered in a descriptive sense only and not for purposes of limitation. Descriptions of features or aspects in each of the embodiments typically apply to other embodiments as well. While one or more embodiments have been described with reference to the figures, it will be understood by those of ordinary skill in the art that various changes in form and details can be made therein without departing from the spirit and scope of the disclosure as defined by the following claims and their equivalents.

Claims

1. A battery pack, characterized in that, The battery pack includes: Battery cell; A first attachment cover surrounds a first portion of the battery cell and is attachable to and detachable from the battery cell; A second attachment cover surrounds a second portion of the battery cell at a different location than the first attachment cover, and is attachable to and detachable from the battery cell; and A release cap that covers at least a portion of the first attachment cap and at least a portion of the second attachment cap, and is attachable to and detachable from the first attachment cap and the second attachment cap.

2. The battery pack according to claim 1, characterized in that: The first attachment cover is at the same level as the second attachment cover, and The release cap is at a different level than the first attachment cap and the second attachment cap.

3. The battery pack according to claim 1, characterized in that, The second attachment cover is positioned inward in the planar direction from the outline of the first attachment cover.

4. The battery pack according to claim 1, characterized in that: The first attachment cover includes an opening, and The second attachment cover is located inside the opening, does not overlap with the first attachment cover, and the size of the second attachment cover is equal to or smaller than the size of the opening.

5. The battery pack according to claim 1, characterized in that, The second attachment cover can be attached to or detached from the battery cell independently of the first attachment cover.

6. The battery pack according to claim 1, characterized in that, The battery cell includes: First surface; The second surface is opposite to the first surface; A pair of long sides connect the first surface to the second surface; and A pair of short sides connect the first surface and the second surface at positions different from those of the pair of long sides, wherein: The first attachment cover surrounds at least a portion of the pair of long sides, and The second attachment cover surrounds at least a portion of either of the pair of long sides.

7. The battery pack according to claim 6, characterized in that, The first attachment cover surrounds the entire second surface, a portion of the first surface, and at least a portion of each of the pair of long sides.

8. The battery pack according to claim 6, characterized in that, The release cover is on the surface of the first attachment cover and the second attachment cover opposite to the surfaces of the first attachment cover and the second attachment cover that face the battery cell.

9. The battery pack according to claim 8, characterized in that, With the release cover located on the first attachment cover and the second attachment cover, a portion of the first attachment cover is inside the release cover, and another portion of the first attachment cover is outside the release cover, and the entire second attachment cover is inside the release cover.

10. The battery pack according to claim 8, characterized in that, The release cap includes: The first area covers at least a portion of the first attachment cover and at least a portion of the second attachment cover; and The second region extends from the first region toward either of the pair of short sides and does not overlap with the battery cell.

11. The battery pack according to claim 10, characterized in that, The battery pack further includes a protection circuit module connected to the battery cell, wherein the second region extends toward the short side of the pair of short sides at a position corresponding to the protection circuit module, and protrudes further outward than the short side.

12. The battery pack according to claim 10, characterized in that: The first region has an adhesive material applied to the surface facing the battery cell, and The second region does not have the adhesive material applied to the surface facing the battery cell.

13. The battery pack according to claim 12, characterized in that, The adhesive material applied to the surfaces of the first and second attachment covers facing the battery cell has a greater adhesive force than the adhesive material applied to the first area.

14. The battery pack according to claim 6, characterized in that, The first attachment cover includes: The inner region is attached to the second surface; A first outer region is connected to the inner region to correspond to any one of the long sides of the battery cell; The second outer region is connected to the inner region to correspond to another of the long sides of the battery cell; The wing is connected to the second outer region and attached to the first surface; An opening extending across the wing, the second outer region, and the inner region; and Edge region, extending along the edge of the opening, wherein: The second attachment cover is located inside the opening.

15. The battery pack according to claim 14, characterized in that, The release cap covers the edge area.

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