Battery pack and method of forming battery pack

Abstract

The invention relates to a battery pack and a method of forming a battery pack. The battery pack includes: a stacked cell including a plurality of battery cells; a bracket surrounding the stacked cell and including a communication hole through which at least a portion of the stacked cell is exposed to an outside of the bracket; and a housing surrounding the bracket. An adhesive is provided for securing the stacked cells, the bracket, and the housing together.

Description

Technical Field

[0001] One or more embodiments relate to battery packs and methods of forming battery packs. Background Art

[0002] Secondary batteries are batteries designed for charging and discharging, and can be used as energy sources for mobile devices, electric vehicles, hybrid vehicles, electric bicycles, uninterruptible power supplies, etc. Depending on the type of external device using the secondary battery, a single secondary battery or a plurality of secondary batteries (secondary battery module) in which a plurality of battery cells are connected as a unit is used.

[0003] The above information disclosed in this Background section is only for enhancement of understanding of the background of the present disclosure and therefore it may contain information that does not constitute relevant art. Summary of the Invention

[0004] One or more embodiments include a battery pack that can increase fixing force between a battery cell and a case.

[0005] However, technical problems to be solved by the embodiments are not limited to those described herein, and other solved problems not mentioned herein will be clearly understood by those of ordinary skill in the art from the following description.

[0006] Additional aspects will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the presented embodiments.

[0007] According to one or more embodiments, a battery pack includes: a stacked cell, including a plurality of battery cells; a bracket, surrounding the stacked cell and including at least one communicating hole, at least a portion of the stacked cell being exposed to the outside of the bracket through the at least one communicating hole; a shell, surrounding the bracket; and an adhesive for fixing the stacked cell, the bracket and the shell together.

[0008] The adhesive may be configured to fix the stacked unit, the bracket, and the housing together in a region adjacent to the at least one communication hole.

[0009] The at least one communication hole may have a form of a long hole extending in any one of a longitudinal direction, a width direction, and a height direction of the bracket.

[0010] The at least one communication hole may include a side surface hole formed in a side surface of the bracket; and a corner hole formed in a top surface of the bracket at a position corresponding to the side surface hole.

[0011] The side surface hole may be spaced apart from a center of the side surface in a longitudinal direction of the bracket, may be adjacent to a corner portion of the bracket, and may have a form of a hole extending in the longitudinal direction of the bracket.

[0012] A plurality of side surface holes may be positioned side by side in the longitudinal direction of the bracket and may be spaced apart from each other in a height direction of the bracket, wherein the bracket further includes a plurality of ribs between the plurality of side surface holes.

[0013] The adhesive fixes the stacking unit, the bracket, and the case together on the inner surface of the bracket and the outer surface of the bracket in an area adjacent to the side surface hole.

[0014] The bracket may further include a coupling surface formed on the side surface of the bracket and a first protrusion formed on the side surface.

[0015] The bracket may further include a second protrusion adjacent to a corner portion of the bracket, wherein the side surface hole is between the first protrusion and the second protrusion in a longitudinal direction of the bracket.

[0016] The adhesive may be applied between or around the first protrusion and the second protrusion.

[0017] A plurality of coupling surfaces may be provided on a side surface of the bracket, wherein a plurality of protrusions are provided on sides of the coupling surfaces.

[0018] The communication hole may include a rear surface hole in a rear surface of the bracket and a rear hole in a top surface of the bracket.

[0019] The rear aperture may be positioned adjacent to the rear surface aperture, may be at a rear edge of the top surface of the bracket, and open into the rear surface aperture.

[0020] The adhesive may fix the stacking unit, the bracket, and the case together on an inner surface of the bracket and an outer surface of the bracket around the rear surface hole.

[0021] The at least one communication hole may include a front hole in a top surface of the bracket, wherein the bracket further includes a slit hole formed in the front surface of the bracket and into which a tab portion of each of the plurality of battery cells is inserted.

[0022] According to another embodiment, a method for forming a battery pack is provided. The method includes injecting an adhesive into at least one communication hole formed in a bracket surrounding a stacked unit including a plurality of battery cells, wherein the adhesive spreads throughout the battery pack to secure the stacked units, the bracket, and a housing surrounding the bracket.

[0023] The at least one connecting hole includes a corner hole formed in the top surface of the bracket and a side surface hole formed in the side surface of the bracket, and the adhesive is injected into the corner hole and flows through the side surface hole so as to fix the stacked unit, the bracket and the shell together on the inner surface of the bracket and the outer surface of the bracket in the area adjacent to the side surface hole.

[0024] The at least one connecting hole includes a rear surface hole formed in the rear surface of the bracket and a rear hole formed in the top surface of the bracket, and the adhesive is injected into the rear hole and flows through the rear surface hole to fix the stacked unit, the bracket and the shell together on the inner surface of the bracket and the outer surface of the bracket in an area adjacent to the rear surface hole. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] The above and other aspects, features and advantages of certain embodiments of the present disclosure will become more apparent from the following description taken in conjunction with the accompanying drawings.

[0026] The accompanying drawings illustrate preferred embodiments and, together with the foregoing disclosure, are used to provide a further understanding of the technical features of the present disclosure. Therefore, the present disclosure is not limited to the accompanying drawings, wherein:

[0027] Figure 1 Example battery pack;

[0028] Figure 2 is an exploded perspective view of an example battery pack;

[0029] Figure 3 Example housing and cover;

[0030] Figure 4 Example stacking monomers;

[0031] Figure 5 An exploded perspective view illustrating a stacked unit;

[0032] Figure 6 Example battery cells;

[0033] Figure 7 exemplifies the bracket viewed in one direction;

[0034] Figure 8 illustrates the bracket viewed in another direction;

[0035] Figure 9 illustrating a side surface of the bracket;

[0036] Figure 10 The rear surface of the example bracket;

[0037] Figure 11 illustrating a top surface of the bracket; and

[0038] Figures 12 to 15 The following illustrates a state where the adhesive is injected into the bracket. DETAILED DESCRIPTION

[0039] Reference will now be made in detail to the embodiments, examples of which are illustrated in the accompanying drawings, wherein the same reference numerals refer to the same elements throughout. In this regard, the present embodiment may have different forms and should not be construed as being limited to the description set forth herein. Accordingly, the embodiments are described below only with reference to the figures to explain aspects of this specification. As used herein, the term "and / or" includes any and all combinations of one or more related listed items. Expressions such as "at least one of...", if following a list of elements, modify the entire list of elements, not the individual elements in the list.

[0040] Hereinafter, the embodiments will be described in more detail with reference to the accompanying drawings. However, the described embodiments may have various modifications and may be embodied in different forms and should not be construed as being limited to the embodiments illustrated herein. In addition, each feature of the various embodiments may be combined in part or in whole or in combination with each other, and various interlocks and drives are technically possible. Each embodiment may be implemented independently of one another or may be implemented together in association. The described embodiments are provided as examples so that this disclosure will be thorough and complete and will fully convey the aspects of the present disclosure to those skilled in the art. It should be understood that the present disclosure covers all modifications, equivalents and replacements within the scope of the ideas and techniques of the present disclosure. Accordingly, processes, elements and techniques that are unnecessary for a person of ordinary skill in the art to fully understand the aspects of the present disclosure may not be described.

[0041] Unless otherwise specified, throughout the drawings and written description, identical reference numerals, characters, or combinations thereof represent identical elements, and therefore, description thereof will not be repeated. In addition, parts that are irrelevant or unrelated to the description of the embodiments may not be shown in order to make the description clear.

[0042] In the drawings, the relative sizes of elements, layers, and regions may be exaggerated for clarity. In addition, the use of cross-hatching and / or shading in the drawings is generally provided to clarify the boundaries between adjacent elements. As such, unless otherwise indicated, the presence or absence of cross-hatching or shading does not convey or indicate any preference or requirement for specific materials, material properties, dimensions, proportions, commonalities between illustrated elements, and / or any other characteristics, attributes, properties, etc. of the elements.

[0043] Various embodiments are described herein with reference to cross-sectional illustrations, which are schematic illustrations of embodiments and / or intermediate structures. As such, variations from the illustrated shapes due to, for example, manufacturing techniques and / or tolerances are to be expected. Furthermore, specific structural or functional descriptions disclosed herein are merely illustrative for purposes of describing embodiments according to the presently disclosed concepts. Accordingly, the embodiments disclosed herein should not be construed as limited to the illustrated shapes of regions, but are intended to include deviations in shapes resulting from, for example, manufacturing.

[0044] The regions illustrated in the drawings are schematic in nature, and their shapes are not intended to illustrate the actual shape of a region of a device and are not intended to be limiting. Additionally, as will be appreciated by those skilled in the art, the described embodiments may be modified in various ways, all without departing from the spirit or scope of the present disclosure.

[0045] In the detailed description, for purposes of explanation, numerous specific details are set forth to provide a thorough understanding of the various embodiments. However, it will be apparent that the various embodiments can be practiced without these specific details or with one or more equivalent arrangements. In other cases, well-known structures and devices are shown in block diagram form to avoid unnecessarily obscuring the various embodiments.

[0046] For ease of explanation, spatial relative terms such as "below", "below", "down", "downside", "below", "above", "upper side" etc. can be used in this article to describe the relationship between an element or feature and another element or feature as illustrated in the figure. It will be understood that spatial relative terms are intended to cover different orientations of the device in use or operation except the orientation depicted in the figure. For example, if the device in the figure is turned over, the element described as being "below", "below" or "below" other elements or features will be oriented "above" other elements or features. Therefore, the example terms "below" and "below" can cover both above and below orientations. The device can be oriented in other ways (for example, rotated 90 degrees or in other orientations), and the spatial relative descriptors used in this article should be interpreted accordingly. Similarly, when a first part is described as being arranged "on" a second part, this indicates that the first part is arranged on the upper or lower side of the second part, and is not limited to its upper side based on the direction of gravity.

[0047] In addition, the phrase "in a plan view" means when the object portion is viewed from above, and the phrase "in a schematic cross-sectional view" means when a schematic cross-section taken by vertically cutting the object portion is viewed from the side. The term "overlapping" means that the first object can be above or below or to the side of the second object, and vice versa. In addition, the term "overlapping" can include layered placement, stacking, facing, extending above, covering or partially covering, or any other suitable term that a person of ordinary skill in the art will recognize and understand. The expression "non-overlapping" can include meanings such as "separated from..." or "set aside" or "offset" and any other suitable equivalent meanings that a person of ordinary skill in the art will recognize and understand. The term "facing" can mean that the first object can be directly or indirectly opposite to the second object. In the case where a third object is between the first object and the second object, the first object and the second object can be understood as being indirectly opposite to each other, but still facing each other.

[0048] It will be understood that when an element, layer, region, or component is referred to as being "formed on," "on," "connected to," or "(operably or communicatively) coupled to" another element, layer, region, or component, it may be directly formed on, directly on, directly connected to, or coupled to, another element, layer, region, or component, or indirectly formed on, indirectly on, indirectly connected to, or coupled to, another element, layer, region, or component such that one or more intervening elements, layers, regions, or components may be present. Additionally, this may collectively mean direct or indirect coupling or connection, as well as integral or non-integrated coupling or connection. 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 may be directly electrically connected or coupled to, another layer, region, and / or component, or there may be intervening layers, regions, or components. However, "direct connection / direct coupling" or "directly on..." refers to a component that is directly connected or coupled to another component, or is on another component without an intermediate component. In addition, in this specification, when a part of a layer, film, region, plate, etc. is formed on another part, the formation direction is not limited to the upper direction, but includes forming the part on the side surface or in the lower direction. On the contrary, when a part of a layer, film, region, plate, etc. is formed "below" another part, this includes not only the situation where the part is "directly under" the other part, but also the situation where there is further another part between the part and the other part. At the same time, other expressions describing the relationship between components (such as "between...", "directly between..." or "adjacent to..." and "directly adjacent to...") can be interpreted similarly. In addition, it will also be understood that when an element or layer is referred to as "between" two elements or layers, it can be the only element or layer between the two elements or layers, or one or more intermediate elements or layers can also be present.

[0049] For the purposes of this disclosure, expressions such as “at least one of” or “any of” when following a list of elements modify the entire list of elements and do not modify the individual elements in the list. For example, “at least one of X, Y, and Z,” “at least one of X, Y, or Z,” “at least one selected from the group consisting of X, Y, and Z,” and “at least one selected from the group consisting of X, Y, or Z” may be interpreted as only X, only Y, only Z, any combination of two or more of X, Y, and Z (such as, for example, XYZ, XYY, YZ, and ZZ), or any variation thereof. Similarly, expressions such as “at least one of A and B” and “at least one of A or B” may include A, B, or A and B. As used herein, “or” generally means “and / or,” and the term “and / or” includes any and all combinations of one or more of the associated listed items. For example, expressions such as “A and / or B” may include A, B, or A and B.

[0050] It will be understood that although the terms "first", "second", "third", etc. can be used in this article to describe various elements, components, regions, layers and / or sections, these elements, components, regions, layers and / or sections should not be 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. Therefore, without departing from the spirit and scope of the present disclosure, the first element, component, region, layer or section described below can be referred to as the second element, component, region, layer or section. Describing an element as a "first" element may not require or imply the presence of a second element or other elements. The terms "first", "second", etc. can also be used in this article to distinguish elements of different classes or different groups. For the sake of brevity, the terms "first", "second", etc. can respectively represent "first class (or first group)", "second class (or second group)", etc.

[0051] The terms used in this application are only used to describe specific embodiments and are not intended to limit the present disclosure. As used in this article, the singular form "one" is intended to also include the plural form, and the plural form is also intended to include the singular form, unless the context clearly indicates otherwise. It will be further understood that the terms "comprise", "have" and "comprising" indicate the presence of described features, integers, steps, operations, elements and / or parts when used in this specification. However, these terms do not exclude the presence or addition of one or more other features, integers, steps, operations, elements, parts and / or their groups.

[0052] When one or more embodiments can be implemented differently, the specific process order can be performed differently from the described order. For example, two consecutively described processes can be performed substantially simultaneously, or can be performed in the reverse order of the described order.

[0053] As used herein, the terms "substantially," "about," "approximately," and similar terms are used as terms of approximation, not as terms of degree, and are intended to account for the inherent variation in measured or calculated values ​​that one of ordinary skill in the art would recognize. For example, "approximately" can mean within one or more standard deviations, or within ±30%, 20%, 10%, 5% of the stated value.

[0054] Unless otherwise defined, all terms (including technical and scientific terms) used herein have the same meaning as commonly understood by those skilled in the art to which the present disclosure belongs. It will be further understood that terms such as those defined in commonly used dictionaries should be interpreted as having a meaning consistent with their meaning in the context of the relevant art and / or this specification, and should not be interpreted in an idealized or overly formal sense unless explicitly defined as such herein.

[0055] Figure 1 A battery pack 10 is illustrated as an example. Figure 2 1 is an exploded perspective view illustrating the battery pack 10 . Figure 3 The housing 300 and the cover 400 are illustrated. Figure 4 A stacked unit 100 is illustrated. Figure 5 FIG. 1 is an exploded perspective view illustrating the stacking unit 100 . Figure 6 A battery cell 110 is illustrated as an example. Figure 7 The bracket 200 is illustrated as viewed in one direction. Figure 8 The bracket 200 is illustrated as viewed from another direction. Figure 9 The side surface of the bracket 200 is illustrated. Figure 10 The rear surface of the bracket 200 is illustrated. Figure 11 The top surface of the bracket 200 is illustrated.

[0056] The battery pack 10 refers to a battery assembly that supports a stacked cell 100 in which a plurality of battery cells 110 are combined into a group to protect the plurality of battery cells 110 from external shocks, heat, vibrations, and the like. The battery pack 10 may include a plurality of battery cells 110, each of which has a prismatic shape, a pouch shape, or a cylindrical shape. The following will describe an embodiment in which the battery pack 10 includes a stacked cell 100 comprising a plurality of battery cells 110, each of which has a pouch shape. The battery pack 10 can be applied to large applications such as energy storage systems (ESS) or small applications such as power tools. Alternatively, the battery pack 10 can be used in electric vehicles. The battery pack 10 can be used alone or can be electrically connected to another battery pack 10. The battery pack 10 may include: a stacked cell 100 including a plurality of battery cells 110; a bracket 200 surrounding the stacked cell 100 and including a communication hole 210, through which at least a portion of the stacked cell 100 is exposed to the outside of the bracket 200; a housing 300 surrounding the bracket 200; and an adhesive G for fixing the stacked cell 100, the bracket 200, and the housing 300 together. In particular, the adhesive G may be configured to fix the stacked cell 100, the bracket 200, and the housing 300 together around the communication hole 210 (i.e., in an area adjacent to the communication hole 210).

[0057] The battery pack 10 may include a stacked cell 100 , a bracket 200 , a case 300 , a cover 400 , a fixing tape 500 , and a support 600 .

[0058] The stacked cell 100 may be a collection of a plurality of battery cells 110. The stacked cell 100 may be supported on the bracket 200 by the adhesive G. The stacked cell 100 may include the battery cell 110, a tab portion 120, a support member 130, a separation member 140, and a fixing member 150.

[0059] The battery cell 110 is a pouch-type battery cell and may be arranged in a height direction (eg, Figure 4 The plurality of battery cells 110 may be stacked in the Z-axis direction of the battery pack 10 to form a stacked unit 100. The plurality of battery cells 110 may be individually stacked in the height direction of the battery pack 10 while being separated from each other. Alternatively, the plurality of battery cells 110 may be folded toward each other while being connected in one direction and stacked in the height direction of the battery pack 10. Figure 4 The stacked unit 100 is illustrated as including seven battery cells 110, but the number of battery cells 110 is not limited to seven. For example, the number of battery cells 110 included in the stacked unit 100 may be two to six, or may be eight or more. The battery cells 110 may be formed by winding and / or stacking an electrode assembly in which a separator is located between a negative electrode layer and a positive electrode layer.

[0060] Each battery cell 110 may include an electrode assembly 111 and a case 112 .

[0061] The electrode assembly 111 may be manufactured in a jellyroll form by winding the first electrode plate 1111, the second electrode plate 1112, and the separator 1113 between the first electrode plate 1111 and the second electrode plate 1112. Alternatively, the electrode assembly 111 may be manufactured in a stacked form by stacking the separator 1113 between a plurality of first electrode plates 1111 and second electrode plates 1112. Alternatively, the electrode assembly 111 may be manufactured by applying both the jellyroll form and the stacked form.

[0062] The first electrode plate 1111 includes a first active material coating portion formed by intermittently coating a first active material on a first substrate (which is a sheet-shaped conductive material) and a first uncoated portion where the first active material is not coated, exposing the first substrate. For example, the first electrode plate 1111 may be a negative electrode plate, and the first active material may be a negative electrode active material including a carbon material (such as crystalline carbon, amorphous carbon, a carbon composite, or a carbon filler), lithium metal, or a lithium alloy.

[0063] The second electrode plate 1112 has a polarity different from that of the first electrode plate 1111, and includes a second active material coating portion formed by intermittently coating a second active material on a second substrate (which is a sheet-shaped conductive material) and a second uncoated portion where the second active material is not coated to expose the second substrate. For example, the second electrode plate 1112 may be a positive electrode plate, and the second active material may include a positive electrode active material including LiCoO2, LiNiO2, LiMnO2, LiMn2O4, LiNi 1-x-y Co x M y O2 (where M is a metal) or LiFePO4 (LFP).

[0064] The separator 1113 is between the first electrode plate 1111 and the second electrode plate 1112. The separator 1113 can insulate the first electrode plate 1111 from the second electrode plate 1112 and allow lithium ions to be exchanged between the first electrode plate 111 and the second electrode plate 1112. The separator 1113 can have a sufficient length to completely insulate the first electrode plate 1111 from the second electrode plate 1112 even when the electrode assembly 111 contracts or expands while the battery cell 110 is charged and discharged.

[0065] The tab portion 120 may include a cell tab 121 and a membrane portion 122 .

[0066] The cell tab 121 may be located on each of the first electrode plate 1111 and the second electrode plate 1112 and may protrude from one side of the battery cell 110. For example, a pair of cell tabs 121 may be provided to correspond to the first electrode plate 1111 and the second electrode plate 1112. The cell tab 121 may be electrically connected to one side of the first uncoated portion and may extend toward the outside of the electrode assembly 111. In addition, the cell tab 121 may be electrically connected to one side of the second uncoated portion of the second electrode plate 1112 and may extend toward the outside of the electrode assembly 111.

[0067] The membrane portion 122 may be on the cell tab 121. The membrane portion 122 is on one surface of the cell tab 121 or surrounds the cell tab 122. The membrane portion 122 may seal the cell tab 121 exposed to the outside of the electrode assembly 111. For example, in order to prevent a short circuit from occurring when the cell tab 121 contacts a metal layer exposed at one end of the sealing portion 1124 of the outer case 112, the membrane portion 122 is thermally fused to the sealing portion 1124 so that the cell tab 121 and the sealing portion 1124 are tightly coupled to each other.

[0068] The outer shell 112 forms the exterior of the battery cell 110, and the electrode assembly 111 is located in the outer shell 112. The shape and size of the outer shell 112 are not particularly limited, and the outer shell 112 may have a shape and size corresponding to the electrode assembly 111. For example, Figure 6 As shown, the housing 112 may have a rectangular parallelepiped shape providing an internal space. Alternatively, the housing 112 may have other polyhedral shapes or a cylindrical shape.

[0069] The housing 112 may include a cover 1121 , a lower housing 1122 , an inner space 1123 , and a sealing portion 1124 .

[0070] The lower case 1122 may provide an inner space 1123 having a size larger than that of the electrode assembly 111, and the electrode assembly 111 may be inserted into the inner space 1123. The cover 1121 may be connected to the top surface of the lower case 1122 to open and close, and may cover the lower case 1122 when the electrode assembly 111 is inserted into the inner space 1123.

[0071] The sealing portion 1124 may be formed along the upper edge of the lower case 1122. In a state where the electrode assembly 111 is accommodated in the lower case 1122, a portion of the tab portion 120 may be exposed to the outside of the case 112. The film portion 122 provided on the tab portion 120 may be provided between the cover 1121 and the lower case 1122 at a position corresponding to the sealing portion 1124. Accordingly, the battery cell 110 having the electrode assembly 111 accommodated in the lower case 1122 may be formed.

[0072] Each battery cell 110 may include one or more tab portions 120. The tab portion 120 may extend from the battery cell 110 and may be connected to a substrate tab (such as a protection circuit module). Figure 4 As shown, each battery cell 110 may include two tab portions 120. The two tab portions 120 may be connected to a first electrode plate 1111 and a second electrode plate 1112 of the battery cell 110, respectively.

[0073] The support member 130 may be located at one side of the battery cell 110 to support the tab portion 120. For example, Figure 4 As shown, the support member 130 may be formed on one surface (eg, Figure 4 The support member 130 is disposed on a platform (on the front surface in the X-axis direction). One support member 130 may correspond to two battery cells positioned adjacent to each other in the height direction of the battery pack 10, and may support the tab portion 120 of each battery cell 110. The support member 130 may have a bar shape and may support the tab portion 120 so that the tab portion 120 is not excessively bent or damaged.

[0074] One or more separator members 140 may be included in the stacked cells 100. For example, one separator member 140 may correspond to two adjacent battery cells 110. The separator members 140 may separate the adjacent battery cells 110 from each other so that if one battery cell 110 swells, it is prevented from squeezing or damaging another battery cell 110. For example, Figure 5 As shown, the partition member 140 may include an opening on the inner side of the partition member 140. The opening of the partition member 140 may be positioned to correspond to the center of the battery cell 110, thereby forming a spare space between adjacent battery cells 110. Accordingly, even if the center of the battery cell 110 swells, the battery cell 110 can be prevented from contacting another battery cell 110, or the force pressing the other battery cell 110 can be reduced.

[0075] The fixing member 150 may be located between two adjacent battery cells 110 to fix the two battery cells 110 to each other. Figure 4 and Figure 5As shown, one surface of the fixing member 150 can be attached to the top surface or bottom surface of one of the battery cells 110, and the other surface of the fixing member 250 can be attached to the top surface or bottom surface of the adjacent battery cell 110 to fix the two adjacent battery cells 110 to each other in the height direction. The fixing member 150 can be positioned to correspond to the center of the battery cell 110 and can have a size smaller than the size of the battery cell 110. For example, the fixing member 150 can be arranged in the longitudinal direction of the stacked cell 100 (e.g., Figure 4 X-axis direction) and / or the width direction of the stacked unit 100 (eg, Figure 4 The fixing member 150 may be formed on the inner side of the outer periphery of the battery cell 110 in the Y-axis direction. The fixing member 150 may have a polygonal shape such as a triangle or a quadrilateral, a circular shape, or an elliptical shape. The adhesive material may be applied to both surfaces of the fixing member 150.

[0076] The stacked unit 100 may include a plurality of (eg, seven) battery cells 110. The plurality of battery cells 110 may be stacked in a height direction (eg, Figure 4 The battery cells 110 are stacked in the Z-axis direction, and each battery cell 110 may include a plurality of (e.g., two) tab portions 120. One support member 130 may be located on a platform of two battery cells 110 adjacent to each other in the height direction, and each support member 130 may support a plurality of tab portions 120. A partition member 140 and a fixing member 150 may be provided between adjacent battery cells 110. The partition member 140 and the fixing member 150 may be at different levels, i.e., at Figure 4 At different positions in the Z-axis direction. That is, the separator members 140 and the fixing members 150 may be positioned alternately and may not be between the same two adjacent battery cells 110. For example, when the separator member 140 is between one battery cell 110 and a battery cell 110 adjacent to the one battery cell 110 in one direction, the fixing member 150 may be between the one battery cell 110 and a battery cell 110 adjacent to the one battery cell 110 in another direction.

[0077] The bracket 200 can be connected to the housing 300 to support the stacking monomer 100. The bracket 200 can prevent the stacking monomer 100 from colliding with the housing 300 and being damaged by the housing 300. In a state where the stacking monomer 100 is accommodated in the bracket 200, the bracket 200 can be accommodated in the receiving space 310 of the housing 300. One surface of the bracket 200 (for example, the bottom surface facing the inner bottom surface of the housing 300) can be open. Accordingly, in a state where the stacking monomer 100 is accommodated in the bracket 200, the fixing belt 500 attached to the bottom surface of the stacking monomer 100 can contact the inner bottom surface of the housing 300. The bracket 200 can be connected to the stacking monomer 100 and the housing 300 by an adhesive G.

[0078] The bracket 200 may include a communication hole 210 , a front slit 220 , a rib 230 , a coupling surface 240 , a first protrusion 250 , and a second protrusion 260 .

[0079] One or more communication holes 210 may be formed in the bracket 200 so that the inside and outside of the bracket 200 are connected to each other. Adhesive G may be injected through the communication holes 210, and the injected adhesive G may move to the stacking unit 100 and the housing 300. In addition, the stacking unit 100, the bracket 200, and the housing 300 may be fixed to each other by the adhesive G around the communication holes 210. One or more communication holes 210 may be formed in at least one of the top surface 200a, the side surface 200b, the front surface 200c, and the rear surface 200d of the bracket 200. Figure 7 As shown, based on the four corner portions C of the bracket 700, one surface in the X-axis direction may be the front surface 200c, and the two surfaces connected to both sides of the front surface 200b may be the side surfaces 200b. In addition, the surface facing the front surface 200c may be the rear surface 200d, and one surface in the Z-axis direction may be the top surface 200a. The communication hole 210 may be in the form of a long hole extending in any one of the longitudinal direction, width direction, and height direction of the bracket 200.

[0080] The communication hole 210 may include a side surface hole 211 , a rear surface hole 212 , a rear hole 213 , a corner hole 214 , and a front hole 215 .

[0081] The side surface hole 211 may be formed in the surface of the bracket 200. For example, the side surface hole 211 may be formed in at least one of the side surfaces 200b of the bracket 200. The side surface hole 211 may be formed adjacent to the corner portion C of the bracket 200. For example, as Figure 7 As shown, a plurality of side surface holes 211 may be provided in the longitudinal direction of the bracket 200 (eg, Figure 7 The X-axis direction of the bracket 200 extends side by side, and the height direction of the bracket 200 (for example, Figure 7The side surface holes 211 may be spaced apart from each other in the Z-axis direction of the bracket 200. Each side surface hole 211 may have a hole (e.g., a long hole) extending in the longitudinal direction of the bracket 200 and may be located between the first protrusion 250 and the second protrusion 260. In addition, the side surface holes 211 may be formed at positions corresponding to the corner holes 214. Figure 9 As shown, when the bracket 200 is viewed from the side, an imaginary line connecting the centers of the plurality of side surface holes 211 adjacent to one corner portion C may pass through the corresponding corner hole 214. Alternatively, the plurality of side surface holes 211 adjacent to one corner portion C may be arranged in the longitudinal direction of the bracket 200 (e.g., Figure 7 Alternatively, the plurality of side surface holes 211 adjacent to one corner portion C may be located in the height direction of the bracket 200 (e.g., Figure 7 The adhesive G is injected into the corner holes 214, and the injected adhesive G can move downward due to gravity and be applied to the inner and outer sides of the plurality of side surface holes 211. Therefore, the stacked unit 100, the bracket 200, and the housing 300 can be fixed together on the inner and outer surfaces of the bracket 200 around the side surface holes 211.

[0082] Each side surface hole 211 may be formed in the longitudinal direction of the bracket 200 (eg, Figure 9 The length L1 is in the X-axis direction of the bracket 100, and the height direction of the bracket 100 (for example, Figure 9 The side surface holes 211 have a height H1 in the Z-axis direction of the bracket 200. The length L1 of the side surface hole 211 may be equal to or less than the length of the corner hole 214. Accordingly, the adhesive G that moves through the side surface hole 211 can be prevented from being applied to an area that is too wide. Although six side surface holes 211 are shown, the number of side surface holes 211 may be five or less or seven or more. The side surface holes 211 may be spaced apart from the center in the longitudinal direction of the bracket 200 so as to be adjacent to the corner portion C of the bracket 200, and the side surface holes 211 may have the form of a long hole in the longitudinal direction of the bracket.

[0083] Because the side surface hole 211 is between the first protrusion 250 and the second protrusion 260, the adhesive G introduced into the side surface 200b of the bracket 200 through the side surface hole 211 may not flow to another area of ​​the side surface 200b. Accordingly, the other area of ​​the bracket 200 may not be contaminated by the adhesive G, and the stacked unit 100, the bracket 200, and the housing 300 can be firmly fixed at the position where the side surface hole 211 is formed.

[0084] One or more rear surface holes 212 may be formed in the rear surface 200d of the bracket 200. For example, Figure 7 and Figure 8 As shown, two rear surface holes 212 may be formed in the rear surface 200d of the bracket 200, and the two rear plane holes 212 may be formed in the width direction of the bracket 200 (eg, Figure 8 The rear surface holes 212 are spaced apart from each other in the Y-axis direction of the stacking unit 100, the bracket 200, and the housing 300. Each rear surface hole 212 can be provided in an area where the stacking unit 100, the bracket 200, and the housing 300 are fixed by the adhesive G. For example, the rear surface hole 212 can be connected to the rear hole 213, and the adhesive G injected from the rear hole 213 can be introduced into the rear surface hole 216. Therefore, the stacking unit 100, the bracket 200, and the housing 300 can be fixed to each other by the adhesive G around the rear surface hole 212 on the inner and outer surfaces of the bracket 200. The rear surface hole 212 can be between two adjacent corner portions C.

[0085] Each rear surface hole 212 may be formed in the width direction of the bracket 200 (eg, Figure 10 The width W2 is provided in the Y-axis direction of the bracket 20, and the width W2 can be provided in the height direction of the bracket 20 (for example Figure 10 Although two rear surface holes 212 are shown, the number of rear surface holes may be one or three or more.

[0086] One or more rear holes 213 may be formed in the bracket 200 to communicate with (eg, open to) the rear surface hole 212. For example, Figure 7 and Figure 8 As shown, rear holes 213 may be formed in the top surface 200a of the bracket 200 at positions corresponding to each rear surface hole 212. Two rear holes 213 may be formed at the rear edge of the top surface 200a. The rear holes 213 serve as inlets through which adhesive G is injected, and the injected adhesive G may move to the rear surface holes 212 to connect the stacked unit 100 to the bracket 200 and connect the bracket 200 to the housing 300. The rear edge of the rear hole 213 may be connected to the rear surface hole 212.

[0087] One or more corner holes 214 may be formed to correspond to the corner portions C of the bracket 200. The corner holes 214 are inlets through which the adhesive G is injected, and the injected adhesive G may be introduced into the side surface holes 211. For example, Figure 7 and Figure 8As shown, one corner hole 214 may be formed at each of the four corner portions C of the bracket 200. Furthermore, each corner hole 214 may be formed in the top surface 200a, the side surface 200b, and the front surface 200c around a corresponding corner portion C, or may be formed in the top surface 200b, the side surface 200b, and the rear surface 200d around a corresponding corner portion C. The corner portion 214 may be located further outward than the rear hole 213 in the width direction of the bracket 200, and may be located higher than the side surface hole 211 in the height direction of the bracket 200. The corner hole 214 may be formed in the top surface 200a of the bracket 200 at a position corresponding to the side surface hole 211.

[0088] Each corner hole 214 can be in the longitudinal direction of the bracket 200 (eg, Figure 11 The length L3 may be in the width direction of the bracket 100 (eg, Figure 11 The length L3 of the corner hole 214 may be equal to or greater than the length L1 of the side surface hole 211.

[0089] One or more front holes 215 may be formed in one surface of the bracket 200. For example, one front hole 215 may be formed in the top surface of the bracket 200 at a position adjacent to the front slit 220. When necessary, an adhesive G may be injected through the front hole 215. The injected adhesive G may fix the front surface of the stacking unit 100 (e.g., the platform of the stacking unit 100, the wiring portion 120 of the stacking unit 100, or the support member 130) to the front surface of the bracket 200 in the area adjacent to the front slit 220. Alternatively, when necessary, the wiring connected in the stacking unit 100 may pass through the front hole 215. The front hole 215 may be located between two side surface holes 211 adjacent to each other in the width direction of the bracket 200.

[0090] One or more front slots 220 may be formed in the front surface 200c of the bracket 200 at positions corresponding to the front opening 320 of the housing 300. For example, Figure 7 As shown, the front slit 220 may be formed in the front surface 200c of the bracket 200 and may be formed in the width direction of the bracket 100 (eg, Figure 7 The tab portion 120 of the battery cell 110 may protrude to the outside of the bracket 200 and the housing 300 through the front slit 220.

[0091] One or more ribs 230 may be formed on both side surfaces 200b of the bracket 200 at positions adjacent to the side surface holes 211. For example, Figure 7As shown, ribs 230 may be formed between two adjacent side surface holes 211. That is, each rib 230 may be formed between two different adjacent side surface holes 211. When adhesive G injected into corner holes 214 flows into and out of bracket 200 through side surface holes 211, ribs 230 may evenly distribute adhesive G around the plurality of side surface holes 211 and prevent excess adhesive G from leaking from bracket 200. Furthermore, ribs 230 may increase the rigidity of side surface 200b of bracket 200, where the plurality of side surface holes 211 are formed. Ribs 230 may be formed adjacent to corner portion C and may be located between first protrusion 250 and second protrusion 260.

[0092] The coupling surface 240 may be formed on at least one of the side surfaces 200b of the bracket 200 and may be a region where the bracket 200 and the housing 300 are coupled to each other. Figure 7 As shown, the coupling surface 240 may be an area divided by a plurality of first protrusions 250 on the side surface 200b of the bracket 200, and two coupling surfaces 240 may be formed on one side surface 200b. The protrusions 330 of the housing 300 may be coupled to the coupling surfaces 240. For example, when the bracket 200 slides downward into the housing 300, the protrusions 330 may be inserted into each coupling surface 240, and the first protrusion 250 may be located between the two protrusions 330, thereby coupling the bracket 200 and the housing 300 to each other.

[0093] The first protrusions 250 may be formed on both side surfaces 200b of the bracket 200. For example, Figure 7 As shown, a plurality of first protrusions 250 may be formed on both sides of the coupling surface 240. The first protrusions 250 may extend in the height direction on the side surface 200b of the bracket 200 to divide and separate the coupling surface 240. In addition, the first protrusions 250 may be inserted into the insertion grooves 340 to couple the bracket 200 to the housing 300. For example, three first protrusions 250 may be formed on one side surface 200b. The coupling surface 240 may be divided into two sections in the longitudinal direction of the bracket 200 (e.g., Figure 7 The first protrusion 250 at each end is formed between the two first protrusions 250, and the middle first protrusion 250 can separate the coupling surface 240 into two surfaces. In addition, the middle first protrusion 250 can be inserted into the insertion groove 340 to connect the bracket 200 to the housing 300. On each coupling surface 240, two first protrusions 250 can be formed at both ends, and one first protrusion 250 can be formed between the two first protrusions 250.

[0094] One or more second protrusions 260 may be formed adjacent to the corner portion C of the bracket 200. For example, Figure 7As shown, a second protrusion 260 may be formed adjacent to each corner portion C. The second protrusion 260 may be formed in the height direction of the bracket 200 (eg, Figure 7 The second protrusion 260 may partition the region in which the side surface hole 211 is formed together with the first protrusion 250, and may function as a partition wall that prevents the adhesive G introduced through the side surface hole 211 from being excessively introduced into another region.

[0095] The housing 300 can support the elements of the battery pack 10 (e.g., the stacked monomer 100, the bracket 200, the cover 400, the fixing band 500, and the support 600). The stacked monomer 100 and the bracket 200 can be located in the internal space of the housing 300, and the fixing band 500 can be provided on the inner bottom surface of the housing 300 so that the stacked monomer 100 is fixed to the housing 300. Moreover, the cover 400 can be detachably located on the housing 300. In a state where the stacked monomer 100 and the bracket 200 are located in the housing 300, the fixing band 500 can be provided on the top surface of the stacked monomer 100, and the fixing band 500 can be attached to the cover 400 while the cover 400 covers the top of the housing 300. The housing 300 can be connected to the bracket 200 using an adhesive G.

[0096] The housing 300 may include a receiving space 310 , a front opening 320 , a protruding portion 330 , and an insertion groove 340 .

[0097] The receiving space 310 is a space formed inside the housing 300, and the stacking unit 100 and the bracket 200 can be located in the receiving space 310. When the stacking unit 100 is accommodated in the receiving space 310, a portion of the stacking unit 100 (for example, the tab portion 120) can protrude outside the receiving space 310. The receiving space 310 can be opened and closed by the cover 400.

[0098] The front opening 320 may be formed on the front surface of the housing 300 (eg, Figure 3 In a state where the stacked unit 100 is located in the receiving space 310, the tab portion 120 may protrude from the front opening 320. For example, Figure 3 As shown, two front openings 320 may be formed to correspond to the tab portion 120 of each battery cell 110 .

[0099] One or more protrusions 330 may be formed on the housing 300 to help couple the bracket 200 to the housing 300. For example, Figure 3As shown, a protrusion 330 may be formed on the inner side surface of the housing 300 to face the receiving space 310. The protrusion 330 may protrude from the inner side surface of the housing 300 toward the receiving space 310, and a plurality of protrusions (e.g., two protrusions) may be formed on each side surface of the housing 300. The protrusion 330 may be inserted into the coupling surface 240 of the bracket 200 to support the bracket 200 and the housing 300.

[0100] One or more insertion slots 340 may be formed in the housing 300 to facilitate coupling the bracket 200 to the housing 300. For example, Figure 3 As shown, the insertion groove 340 may be formed in the inner side surface of the housing 300 to face the receiving space 310. The insertion groove 340 may be recessed relative to the protruding portion 330, and one insertion groove 340 may be formed in each side surface of the housing 300. Figure 3 As shown, the insertion groove 340 may be formed between the two protruding portions 330 and may be formed in the height direction of the battery pack 10 (eg, Figure 3 One of the first protrusions 250 of the bracket 200 may be inserted into the insertion groove 340 to fix the bracket 200 to the housing 300.

[0101] The cover 400 can open and close the receiving space 310 of the housing 300 and can be detachably attached to the housing 300. Figure 1 As shown, in a state where the stacking unit 100 and the bracket 200 are located in the housing 300, the cover 400 may cover the top of the housing 300. Alternatively, the cover 400 may be rotatably connected to the housing 300 by a hinge or the like.

[0102] The fixing band 500 can fix the stacking unit 100 to the bracket 200 and the housing 300. For example, Figure 2 As shown, the fixing band 500 may be located on each of the top and bottom surfaces of the stacking unit 100 to fix the top surface of the stacking unit 100 to the inner top surface of the bracket 200 and to fix the bottom surface of the stacking unit 100 to the inner bottom surface of the housing 300. The fixing band 500 may be positioned to correspond to the center of the stacking unit 100. Although two fixing bands 500 are shown, two or more fixing bands 500 may be located on each of the top and bottom surfaces of the stacking unit 100.

[0103] If the battery pack 10 is shaken or damaged, the support member 600 can prevent the stacked cells 100 from contacting the bracket 200 and damaging the stacked cells 100. One or more support members 600 may be between the stacked cells 100 and the bracket 200. One support member 600 may correspond to a corresponding side surface of the stacked cell 100, with one surface of the support member 600 facing the side surface of the stacked cell 100 and the other surface of the support member 600 facing the inner side surface of the bracket 200. The height of the support member 600 may be equal to or less than the height of the stacked cell 100 in the height direction.

[0104] Figures 12 to 15 A state where the adhesive G is injected into the bracket 200 is illustrated.

[0105] like Figure 12 As shown in FIG, the adhesive G can be injected into the battery pack 10 through the corner hole 214, and the injected adhesive G can move downward due to its own weight. As the adhesive G moves along the inner side of the side surface 200b of the bracket 200, a portion of the adhesive G can flow to the outside of the side surface 200b through the side surface hole 211, and the remaining portion can flow to the inside of the side surface 200b. Figure 12 As shown, the adhesive G having a certain viscosity can flow around the plurality of side surface holes 211. Figure 13 As shown, adhesive G can be applied to the inside and outside of the bracket 200 relative to the corner hole 214. Accordingly, the stacked cells 100 inside the bracket 200 can be fixed to the bracket 200, and the bracket 200 can be fixed to the housing 300 outside the bracket 200. Therefore, the stacked cells 100, the bracket 200, and the housing 300 can be fixed around the side surface holes 211 by the adhesive G. Accordingly, even if the battery pack 10 vibrates or is subjected to external impact, the stacked cells 100, the bracket 200, and the housing 300 can remain fixed relative to each other, thereby preventing the stacked cells 100 from colliding with the bracket 200 or preventing the bracket 200 from colliding with the housing 300.

[0106] The adhesive G injected into the corner hole 214 may be applied to the area between or around the first protrusion 250 and the second protrusion 260. Figure 13 As shown, a portion of the adhesive G injected into the corner hole 214 may flow to the outside of the bracket 200 through the plurality of side surface holes 211 and may be coated between or around the first protrusion 250 and the second protrusion 260. In this regard, Figure 12 The adhesive G injected into the corner hole 214 is applied to the area between the first protrusion 250 and the second protrusion 260. Here, the "area between the first protrusion 250 and the second protrusion 260" may include the first protrusion 250 and the second protrusion 260. Figure 13The adhesive G injected into the corner hole 214 is applied to the area around the first protrusion 250 and the second protrusion 260. Here, the "area around the first protrusion 250 and the second protrusion 260" may include the end portions of the first protrusion 250 and the second protrusion 260 in the longitudinal direction of the bracket 200 or the area around the end portions of the first protrusion 250 and the second protrusion 160.

[0107] like Figure 14 As shown, the adhesive G may be injected into the rear hole 213, and the injected adhesive G may move downward due to its own weight. A portion of the adhesive G may flow to the outside of the rear surface 200d through the rear surface hole 212, and the remaining portion may flow to the inside of the rear surface 200d. Figure 14 As shown, the adhesive G having a certain viscosity can flow around the plurality of rear surface holes 212. Figure 15 , adhesive G can be applied to the inside and outside of the bracket 200 relative to the rear surface hole 212. Accordingly, the stacked cells 100 inside the bracket 200 can be fixed to the bracket 200, and the bracket 200 can be fixed to the housing 300 outside the bracket 200. That is, the stacked cells 100, the bracket 200, and the housing 300 can be fixed around the rear surface hole 212 by the adhesive G. Accordingly, even if the battery pack 10 is shaken or subjected to external impact, the stacked cells 100, the bracket 200, and the housing 300 can be fixed to each other, thereby preventing the stacked cells 100 from colliding with the bracket 200 or preventing the bracket 200 from colliding with the housing 300.

[0108] In one embodiment, the method of forming the battery pack 10 may include injecting an adhesive G into at least one communicating hole 210 formed in a bracket 200 surrounding the stacked cells 100, and the adhesive G may diffuse in the battery pack 10 so as to fix the stacked cells 100, the bracket 200, and the shell 300 surrounding the bracket 200 together.

[0109] In the battery pack according to various embodiments, since the stacked cells, the bracket, and the case are relatively fixed together due to the adhesive, damage to the stacked cells, the bracket, and the case can be reduced.

[0110] The technical effects of the present disclosure are not limited to those discussed herein, and other unmentioned technical effects will be apparent to those of ordinary skill in the art from the description.

[0111] It should be understood that the embodiments described herein should be considered merely as illustrative and not for purposes of limitation. The description of features or aspects in 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 drawings, it will be understood by those skilled in the art 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.

Claims

1. A battery pack comprising: Stacked cells, including multiple battery cells; a bracket surrounding the stacked unit and comprising at least one communicating hole, wherein at least a portion of the stacked unit is exposed to the outside of the bracket through the at least one communicating hole; a housing surrounding the bracket; as well as An adhesive is used to fix the stacking unit, the bracket and the housing together. 2 . The battery pack according to claim 1 , wherein the adhesive is configured to fix the stacked cells, the bracket, and the case together in a region adjacent to the at least one communication hole. 3 . The battery pack according to claim 1 , wherein the at least one communication hole has a form of a long hole extending in any one of a longitudinal direction, a width direction, and a height direction of the bracket.

4. The battery pack according to claim 1, wherein the at least one communication hole comprises: a side surface hole formed in a side surface of the bracket; as well as Corner holes are formed in the top surface of the bracket at positions corresponding to the side surface holes. 5 . The battery pack according to claim 4 , wherein the side surface hole is spaced apart from a center of the side surface in a longitudinal direction of the bracket, is adjacent to a corner portion of the bracket, and has a form of a hole extending in the longitudinal direction of the bracket.

6. The battery pack according to claim 5, wherein a plurality of side surface holes are positioned side by side in the longitudinal direction of the bracket and are spaced apart from each other in a height direction of the bracket, wherein the bracket further comprises a plurality of ribs between the plurality of side surface holes, wherein the corner hole has a length in the longitudinal direction of the bracket that is equal to or greater than a length of the side surface hole in the longitudinal direction of the bracket. 7 . The battery pack according to claim 4 , wherein the adhesive fixes the stacked cells, the bracket, and the case together on an inner surface of the bracket and an outer surface of the bracket in an area adjacent to the side surface hole.

8. The battery pack according to claim 4, wherein the bracket further comprises: a coupling surface formed on the side surface of the bracket; as well as protrusions formed on the side surfaces, The side surface hole is located further outward than the first protrusion in the longitudinal direction of the bracket.

9. The battery pack according to claim 8, wherein the protrusion is a first protrusion, wherein the bracket further comprises a second protrusion adjacent to a corner portion of the bracket, and The side surface hole is located between the first protrusion and the second protrusion in the longitudinal direction of the bracket. 10 . The battery pack according to claim 9 , wherein the injected adhesive is applied between or around the first protrusion and the second protrusion.

11. The battery pack according to claim 8, wherein a plurality of coupling surfaces are provided on a side surface of the bracket, wherein a plurality of protrusions are provided on the sides of the coupling surface, The housing comprises: a protruding portion formed on an inner surface of the housing and coupled to the coupling surface; as well as An insertion groove into which a protrusion among the plurality of protrusions located between the plurality of coupling surfaces is inserted.

12. The battery pack according to claim 1, wherein the at least one communication hole comprises: a rear surface hole formed in the rear surface of the bracket; as well as A rear hole is formed in the top surface of the bracket. 13 . The battery pack according to claim 12 , wherein the rear hole is positioned adjacent to the rear surface hole at a rear edge of the top surface of the bracket and opens into the rear surface hole. 14 . The battery pack according to claim 12 , wherein the adhesive fixes the stacked cells, the bracket, and the case together on an inner surface of the bracket and an outer surface of the bracket in an area adjacent to the rear surface hole.

15. The battery pack according to claim 1, wherein the at least one communication hole comprises a front hole in a top surface of the bracket, wherein the bracket further includes a slit hole formed in a front surface of the bracket, and a tab portion of each of the plurality of battery cells is inserted into the slit hole.

16. A method of forming a battery pack, the method comprising: injecting an adhesive into at least one communication hole formed in a bracket surrounding a stacked unit including a plurality of battery cells, The adhesive is spread in the battery pack to fix the stacked cells, the bracket, and a housing surrounding the bracket together.

17. The method according to claim 16, wherein the at least one communication hole comprises a corner hole formed in a top surface of the bracket and a side surface hole formed in a side surface of the bracket, and The adhesive is injected into the corner holes and flows through the side surface holes to fix the stacking unit, the bracket and the housing together on the inner surface of the bracket and the outer surface of the bracket in areas adjacent to the side surface holes.

18. The method of claim 16, wherein the at least one communication hole comprises a rear surface hole formed in a rear surface of the bracket and a rear hole formed in a top surface of the bracket, and The adhesive is injected into the rear hole and flows through the rear surface hole to fix the stacking unit, the bracket and the housing together on the inner surface of the bracket and the outer surface of the bracket in an area adjacent to the rear surface hole.

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