Battery pack

Abstract

To provide a battery pack.SOLUTION: The battery pack includes a housing and a battery module in the housing. The housing includes a housing projection part formed on the housing and housing ribs extending from the housing projection part in directions different. The housing ribs formed on any one of the housing projection parts can be spaced apart from each other along a circumferential direction of the housing projection.SELECTED DRAWING: Figure 3

Description

[Technical Field]

[0001] The present invention relates to a battery pack. [Background technology]

[0002] A secondary battery is a battery designed to be capable of charging and discharging, and can be used as an energy source for mobile devices, electric vehicles, hybrid vehicles, electric bicycles, uninterruptible power supplies, etc. Depending on the type of external device to which it is applied, a secondary battery may be used in the form of a single battery cell, or in the form of a module or pack in which multiple battery cells are connected together to form a single unit.

[0003] The above information disclosed in the background of the invention is intended to enhance understanding of the background of the invention and may include information that does not constitute prior art. Summary of the Invention [Problem to be solved by the invention]

[0004] The problem to be solved by the present invention is to provide a battery pack that can distribute the load of the battery modules and increase the rigidity of the ribs that support the battery modules, thereby improving the durability and reliability of the battery pack.

[0005] However, the technical problems that the present invention aims to solve are not limited to the above-mentioned problems, and other problems not mentioned will be clearly understood by those skilled in the art from the following description of the invention. [Means for solving the problem]

[0006] The battery pack includes a housing and a battery module within the housing, the housing including a housing protrusion formed on the housing and housing ribs extending in different directions from the housing protrusion, and the housing ribs formed on any one of the housing protrusions may be spaced apart from each other along a circumferential direction of the housing protrusion.

[0007] The housing may include a first housing surface including a bottom surface of the housing and a second housing surface extending in a height direction along an edge of the first housing surface.

[0008] A housing rib extending from any one housing protrusion may be connected to another adjacent housing protrusion.

[0009] The housing protrusion may have a hollow cylindrical shape and may be connected to at least a portion of a bottom surface of the battery module.

[0010] The battery module may include a first coupling protrusion on a bottom surface thereof, and the first coupling protrusion may be inserted into the housing protrusion.

[0011] The housing protrusion may include a first housing boss, and the first coupling protrusions may be inserted into the first housing boss, respectively.

[0012] The housing may include a first fastening hole on a bottom surface, and the battery module may include a second fastening hole (second fastening component) on the bottom surface to correspond to the first fastening hole.

[0013] The housing protrusion may include a third housing boss, and the second fastening holes may be inserted into the third housing boss, respectively.

[0014] The housing protrusion may include a first housing boss, a second housing boss, and a third housing boss.

[0015] The first housing boss and the third housing boss may be inserted into the battery module, and the second housing boss may be spaced apart from a bottom surface of the battery module.

[0016] The second housing boss may be centrally located across the width of the housing.

[0017] The first housing boss may include a plurality of third housing bosses, and the plurality of third housing bosses may be formed to correspond to long sides of the battery module.

[0018] The first housing boss corresponding to any one of the battery modules may be within a first region defined by housing ribs connecting the plurality of third housing bosses corresponding to that battery module with the plurality of third housing bosses.

[0019] The first housing boss may include a plurality of first housing bosses, and the plurality of first housing bosses may be formed to correspond to central portions of corresponding battery modules.

[0020] The battery module may include a plurality of battery modules, and the second housing boss may include a plurality of second housing bosses.

[0021] The plurality of second housing bosses may be within a second region defined by a plurality of third housing bosses corresponding to the outer long side portions of any one of the battery modules, a plurality of third housing bosses corresponding to the outer long side portions of another of the battery modules, and a housing rib connecting the plurality of third housing bosses.

[0022] The first region may include a plurality of first regions, and the second regions may be formed between the plurality of first regions and may contact the first regions, respectively.

[0023] The housing ribs may include a first housing rib extending horizontally, a second housing rib extending vertically, and a third housing rib extending diagonally between the first housing rib and the second housing rib.

[0024] The first housing rib, the second housing rib, and the third housing rib may be connected to the second housing surface.

[0025] The height of the housing rib may be less than the height of the housing protrusion. [Effects of the Invention]

[0026] A battery pack according to an embodiment of the present invention can increase the rigidity of the ribs supporting the battery modules and distribute the load of the battery modules, thereby improving the durability and reliability of the battery pack.

[0027] However, the effects obtained through the present invention are not limited to the effects described above, and other technical effects not mentioned will be clearly understood by those skilled in the art from the following description of the invention. [Brief explanation of the drawings]

[0028] The following drawings attached to this specification illustrate embodiments of the present invention and, together with the description of the invention to be given later, serve to facilitate understanding of the technical concept of the present invention. The present invention is not to be interpreted as being limited to the details shown in the drawings. [Figure 1] FIG. 2 is a perspective view showing a battery pack. [Figure 2] FIG. 2 is an exploded view showing the battery pack. [Figure 3] 1 is a diagram showing the inside of a housing. [Figure 4] 4 is an enlarged view of a part of FIG. 3. [Figure 5] FIG. 5 is a plan view of FIG. [Figure 6] 6 is a cross-sectional view taken along line VI-VI' in FIG. [Figure 7]FIG. 7 is a cross-sectional view taken along line VII-VII′ in FIG. [Figure 8] 4 is an enlarged view of another part of FIG. 3. [Figure 9] 1 is a view showing a state in which a battery module is coupled to a housing; [Figure 10] 4 is an enlarged view of still another part of FIG. 3. [Figure 11] FIG. 11 is a plan view of FIG. [Figure 12] 1 is a diagram showing an inner cover and a battery module. [Figure 13] 10 is a view showing the inner surface of the inner cover. [Figure 14] 14 is an enlarged view of a part of FIG. 13. DETAILED DESCRIPTION OF THE INVENTION

[0029] The embodiments of the present invention and methods therefor can be understood with reference to the description of the invention and the drawings. The described embodiments may have various modifications and be implemented in other forms, and are not limited to the forms described in the description of the invention and the drawings. Furthermore, the features of the various embodiments of the present disclosure may be combined in part or in whole with each other. The embodiments may be implemented independently of each other or in conjunction with each other. The described embodiments are provided as examples and are intended to convey the concept of the present disclosure to those skilled in the art. The present disclosure may be substituted by all modifications, equivalents, and other elements within the concept and technical scope of the present disclosure. Therefore, processes, elements, and techniques unnecessary for those of ordinary skill in the art to fully understand the embodiments of the present disclosure will not be described.

[0030] Unless otherwise specified, the same reference numerals, characters, or combinations thereof throughout the accompanying drawings and the specification indicate the same components, and therefore, redundant explanations will be omitted. In addition, parts that are not relevant to the explanation will be omitted in order to clearly explain the present disclosure.

[0031] In the drawings, the relative sizes of elements, layers, and regions may be exaggerated for clarity. In the accompanying drawings, the use of hatching and / or shading is generally provided to clarify boundaries between adjacent elements. Therefore, the presence or absence of hatching or shading does not indicate preferred forms or requirements regarding specific materials, material properties, dimensions, proportions, commonalities between pictorial elements, and / or other properties, attributes, etc. of elements unless specified.

[0032] Various embodiments are described herein with reference to cross-sectional views that are schematic illustrations of embodiments and / or intermediate structures. Therefore, the shapes of the drawings may vary as a result of, for example, manufacturing techniques and / or tolerances. Furthermore, specific structural or functional descriptions disclosed herein are merely examples for describing embodiments according to the concepts of the present disclosure. Therefore, the embodiments disclosed herein should not be construed as limited to the shapes of the illustrated regions, and include, for example, deviations in shapes due to manufacturing.

[0033] The regions shown in the figures are schematic in nature and their shapes are not intended to illustrate or limit the actual shapes of device regions. Also, as one of ordinary skill in the art would recognize, the illustrated embodiments can be modified in various ways without departing from the spirit or scope of the present disclosure.

[0034] Although numerous specific details are presented in the specification to provide a thorough understanding of various embodiments, various embodiments may be practiced without, or including, one or more of these specific details. In other instances, well-known structures and devices are shown in block diagram form in order to avoid unnecessarily obscuring the various embodiments.

[0035] For ease of description, spatially relative terms such as "below," "above," "lower," and "upper" may be used herein to describe the relationship of one element or feature to another, as illustrated in the figures. Spatially relative terms are intended to encompass various orientations of the device in use or operation in addition to the orientation depicted in the figures. For example, if the device in the figures were inverted, other elements or features described as "below" or "lower" would be oriented "above" the other elements or features. Thus, the exemplary terms "below" and "lower" can encompass both an orientation of above and below. The device may be oriented in other ways (e.g., rotated 90 degrees or at other orientations), and the spatially relative descriptions used herein should be interpreted accordingly. Similarly, when a first portion is described as being "above" a second portion, this means that the first portion is positioned above or below the second portion.

[0036] Furthermore, the term "plan view" refers to a view of an object portion from above, and the term "in schematic cross section" refers to a view of an object portion cut vertically to form a schematic cross section. The term "side view" refers to a first object being above, below, or to the side of a second object, or vice versa. Furthermore, the terms "overlapping" and "overlapping" may include layer, stack, surface, extension, covering, partially covering, or any other suitable term understood and understood by a person of ordinary skill in the art. The term "not overlapping" may include meanings such as "apart from" or "spaced apart from" and any other suitable equivalents recognized and understood by a person of ordinary skill in the art. The terms "surface" and "surface" refer to a first object that may directly or indirectly face a second object. If a third object is present between the first and second objects, the first and second objects may also be understood to face each other but indirectly face each other.

[0037] When an element, layer, region, or component is referred to as being "formed," "coupled," or "bonded" to another element, it may be directly formed on the layer, region, or component, or may be formed on, coupled to, or bonded to the other component, layer, region, or component. This also refers to direct or indirect bonding or coupling of elements, layers, regions, or components, and integral or non-integral bonding or coupling, such that one or more elements, layers, regions, or components are present. For example, when an element, layer, region, or component is referred to as being "electrically coupled" or "electrically coupled" to another element, layer, region, or component, this means that the other element, layer, region, or component is directly electrically coupled or bonded to the other element, layer, region, or component, or the other element, layer, region, or component may be present. However, "directly coupled" or "directly coupled" means that one component is directly coupled or bonded to or on the other component, without intermediate components. Furthermore, in this specification, when a part of a layer, film, region, guide plate, etc. is formed on another part, the forming direction is not limited to above, but also includes forming the part on the side or bottom. Conversely, when a part of a layer, film, region, guide plate, etc. is formed "under" another part, it includes not only when the part is "directly below" the other part, but also when there is another part between the part and the other part. Meanwhile, other expressions describing the relationship between components, such as "between," "immediately between," "adjacent to," and "immediately adjacent to," can be interpreted similarly. Furthermore, when an element or layer is referred to as being "between" two elements or layers, this may be the only element between the two elements or layers, or there may be other elements between them.

[0038] For purposes of this specification, phrases such as "at least one or more" or "any one" do not limit the order of individual elements. For example, "at least one of X, Y, and Z," "at least one of X, Y, or Z," or "at least one selected from the group consisting of X, Y, and Z" may include X alone, Y alone, Z alone, or any combination of two or more of X, Y, and Z. Similarly, phrases 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. Generally, the term "and / or" used herein includes all combinations of one or more of the associated listed items. For example, phrases such as "A and / or B" may include A, B, or A and B.

[0039] Terms such as "first," "second," and "third" may be used herein to describe various elements, components, regions, layers, and / or sections, but such elements, components, regions, layers, and / or sections are not limited by such terms. Such 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 may be referred to as a second element, component, region, layer, or section without departing from the spirit and scope of the present invention. Describing an element as a "first" element does not require or imply the presence of a second or other elements. Terms such as "first" and "second" may be used herein to distinguish between different categories or sets of elements. For clarity, terms such as "first" and "second" may refer to a "first category (or first set)," a "second category (or second set)," etc., respectively.

[0040] The terms used in this application are used only to describe particular embodiments and are not intended to limit the present invention. As used in this specification, the singular is intended to include the plural, and the plural is intended to include the singular unless the context clearly dictates otherwise. The terms "comprise," "comprise," and "have," as used herein, are meant to specify the presence of stated features, integers, and steps. These terms do not exclude the presence or addition of one or more other features, steps, operations, components, and / or groups thereof.

[0041] In some embodiments, the order of certain processes may be different from that described, for example, two steps described as successive may be performed substantially simultaneously or may be performed in the reverse order of that described.

[0042] The terms "substantially," "about," "approximately," and similar terms are used as terms of approximation, rather than terms of degree, to describe inherent variations in measured or calculated values. As used herein, "about" and "approximately" mean inclusive of the stated value and within an acceptable range of variation from the specified value (e.g., the range of variation due to the limitations of the measurement system) determined by one of ordinary skill in the art taking into account the measurement and associated errors. For example, "about" can mean within one or more standard deviations, or within ±30%, 20%, 10%, or 5% of the stated value.

[0043] Unless otherwise defined, all terms used herein, including technical or scientific terms, have the same meaning as commonly understood by a person of ordinary skill in the art to which this invention pertains. Terms as defined in commonly used dictionaries should be interpreted to have a meaning consistent with their meaning in the context of the relevant art and / or this specification, and should not be interpreted as idealized or overly formal unless explicitly defined herein.

[0044] FIG. 1 shows a perspective view of the battery pack 10, FIG. 2 shows an exploded view of the battery pack 10, FIG. 3 shows the inside of the housing 100, and FIG. 4 shows an enlarged portion of FIG. 3. For example, FIG. 4 shows an enlarged view of the upper left corner of FIG. 3. FIG. 5 shows a plan view of FIG. 4, FIG. 6 shows a cross section taken along the cross section line VI-VI' in FIG. 3, and FIG. 7 shows a cross section taken along the cross section line VII-VII' in FIG. 3. For example, FIG. 6 shows a cross section of the housing 100 and the battery module 400 in a coupled state.

[0045] FIG. 8 shows an enlarged view of another portion of FIG. 3. For example, FIG. 8 shows an enlarged view of the second housing surface 102 of the housing 100 on which the contact protrusions 150 are formed. FIG. 9 shows a state in which the battery module 400 is coupled to the housing 100. For example, FIG. 9 shows an enlarged plan view of the area around the contact protrusions 150. FIG. 10 shows an enlarged view of yet another portion of FIG. 3. For example, FIG. 10 shows an enlarged view of the second housing surface 102 of the housing 100 on which the pocket 160 is formed. FIG. 11 shows a plan view of FIG. 10, FIG. 12 shows the inner cover 300 and the battery module 400, FIG. 13 shows the inner surface of the inner cover 300, and FIG. 14 shows an enlarged view of a portion of FIG. 13. For example, FIG. 14 shows an enlarged view of the upper left corner of FIG. 13.

[0046] The battery pack 10 can be applied to large applications such as ESS and electric vehicles, or small and medium-sized applications such as power tools and smartphones. For example, the battery pack 10 can be connected to other devices. For example, the battery pack 10 can be connected to various external devices via an adapter A. The external device can be a power tool such as a chain saw, a drill, or a lawn mower.

[0047] The battery pack 10 may be implemented in a form that can be worn or carried by a user. For example, the battery pack 10 may be implemented in the form of a backpack that a user carries on their back. A connecting member such as a string, buckle, or belt may be attached to the battery pack 10 (e.g., the back surface of the battery pack 10). The user may connect the connecting member to their body, such as their shoulder or waist, and then connect the battery pack 10 to an external device, such as a power tool, to supply power to the external device. The battery pack 10 may include a handle H for carrying by a user. Although the handle H is illustrated on the top of the housing 100 in FIG. 1, one or more handles H may be provided on the front surface (e.g., the surface facing the Z-axis direction in FIG. 1), the back surface, side surface, bottom surface, etc. of the housing 100.

[0048] The battery pack 10 may include a housing 100 and a battery module 400 within the housing 100. The housing 100 may include housing protrusions 110 formed on the housing 100 and housing ribs 120 extending in different directions from the housing protrusions 110. The housing ribs 120 formed on any one of the housing protrusions 110 may be spaced apart from each other along the circumferential direction of the housing protrusion 110.

[0049] The battery pack 10 may include a housing 100 , an outer cover 200 , an inner cover 300 , and a battery module 400 .

[0050] The housing 100 may hold and / or support other components of the battery pack 10 (e.g., the outer cover 200, the inner cover 300, and the battery module 400). The housing 100 may be located at the bottom of the battery pack 10 (e.g., the bottom in the Z-axis direction in FIG. 1 ) and may be hollow. The battery module 400 may be located inside the housing 100. The housing 100 may be hollow or may be a rectangular parallelepiped with an open top. However, the shape of the housing 100 is not limited thereto and may vary depending on the shape of the battery pack 10 or the size and capacity of the battery module 400.

[0051] The housing 100 may include a first housing side 101 and a second housing side 102 .

[0052] The first housing surface 101 may include a bottom surface of the housing 100. For example, as shown in FIG. 3 , the first housing surface 101 corresponds to the inner bottom surface of the housing 100, and at least a portion of the housing protrusion 110, the housing rib 120, the mounting guide 130, the contact protrusion 150, and the pocket 160 may be formed on the first housing surface 101. In addition, the battery module 400 may be disposed on the first housing surface 101.

[0053] The second housing surface 102 may include a side surface of the housing 100. For example, as shown in FIG. 3 , the second housing surface 102 may extend along an edge of the first housing surface 101 and correspond to an inner side surface of the housing 100. The second housing surface 102 may extend in a height direction (e.g., the Z-axis direction in FIG. 1 ) at the edge of the first housing surface 101 and, together with the first housing surface 101, define an internal space in which the battery module 400 is located. At least a portion of the housing ribs 120, the mounting guides 130, the contact protrusions 150, and the pockets 160 may be formed on the second housing surface 102.

[0054] The housing 100 may include a housing protrusion 110 and a housing rib 120 .

[0055] One or more housing protrusions 110 may be formed on the housing 100 to support the battery module 400. For example, as shown in FIG. 3 , a plurality of housing protrusions 110 may be formed on the first housing surface 101 and protrude upward from the first housing surface 101. The upper surface of the housing protrusions 110 may contact the bottom surface of the battery module 400 to support the battery module 400. In addition, the housing protrusions 110 may space the bottom surface of the battery module 400 from the first housing surface 101, thereby forming a space through which heat generated at the bottom of the battery module 400 can be smoothly dissipated. The housing protrusions 110 may have a hollow cylindrical shape. A portion of the battery module 400 (e.g., the first coupling protrusions 420) may be inserted into the housing protrusions 110 to fix the battery module 400 to the housing 100. The plurality of housing protrusions 110 may be spaced apart from each other and connected to the housing ribs 120. The housing protrusion 110 may be coupled to at least a portion of the bottom surface of the battery module 400 .

[0056] The housing protrusion 110 may include a first housing boss 111 , a second housing boss 112 , and a third housing boss 113 .

[0057] One or more first housing bosses 111 may be formed on the first housing surface 101 and may be connected to the battery module 400. For example, the first housing boss 111 may include a plurality of first housing bosses 111. A plurality of first housing bosses 111 may be formed to correspond to one battery module 400, and the battery module 400 may be connected to the first housing boss 111 by inserting at least a portion of the battery module 400 into the first housing boss 111 or by inserting at least a portion of the first housing boss 111 into the battery module 400. For example, a first coupling protrusion 420 of the battery module 400 may be inserted into the first housing boss 111. For example, as shown in FIG. 6 , the battery module 400 may include a first coupling protrusion 420. The first coupling protrusion 420 may extend downward from the bottom surface of the battery module 400 and may have a cylindrical shape. The first coupling protrusion 420 may have a height H2 that is smaller than the height H1 of the first housing boss 111. Here, the height H1 is the height from the first housing surface 101 to the upper end of the first housing boss 111, and the height H2 is the height from the bottom surface of the battery module 400 to the lower end of the first coupling protrusion 420. The height H1 may be greater than the height H of the housing rib 120. The first coupling protrusion 420 may have a diameter that is the same as or smaller than the inner diameter of the first housing boss 111 and can be inserted into the first housing boss 111.

[0058] The first housing boss 111 may be formed to correspond to the center of the battery module 400. In one embodiment, as shown in FIG. 3 , two first housing bosses 111 may be formed at the center of the battery module 400 (indicated by the dotted line) in the width direction (e.g., the X-axis direction in FIG. 3 ). The two first housing bosses 111 may be formed on the same line in the length direction (e.g., the Y-axis direction in FIG. 3 ) of the housing 100. A plurality of first housing bosses 111 may be formed to correspond to each battery module 400. In one embodiment, as shown in FIG. 3 , two first housing bosses 111 may be formed to correspond to each battery module 400, and a total of four first housing bosses 111 may be formed on the first housing surface 101. However, the number of first housing bosses 111 is not limited to four and may vary depending on the size and shape of the battery module 400 and the battery pack 10.

[0059] The first housing boss 111 may be connected to a plurality of housing ribs 120. For example, as shown in FIGS. 3 and 4, a plurality of housing ribs 120 may be connected to the outer circumferential surface of the first housing boss 111. A plurality of housing ribs 120 (e.g., a first housing rib 121, a second housing rib 122, and a third housing rib 123) may be connected around the first housing boss 111 at equal or different intervals. The plurality of housing ribs 120 may extend radially from the center of the first housing boss 111. The plurality of radially extending housing ribs 120 may be connected to other first housing bosses 111, the second housing boss 112 and / or the third housing boss 113, or the second housing surface 102. Therefore, the first housing boss 111, the second housing boss 112, and the third housing boss 113 are connected to each other by a plurality of housing ribs 120, which can efficiently distribute the weight of the battery module 400 and increase the rigidity of the first housing boss 111, the second housing boss 112, and the third housing boss 113.

[0060] In one embodiment, the first housing boss 111 may be formed inside the third housing boss 113. The first housing boss 111 may be formed within a region formed by connecting a plurality of third housing bosses 113. For example, as shown in FIG. 3, two first housing bosses 111 may be formed inside each of region A1 and region A2 (e.g., a first region) formed by connecting a plurality of third housing bosses 113 corresponding to each battery module 400. Here, region A1 and region A2 may also be virtual regions formed by connecting a plurality (e.g., six) third housing bosses 113 corresponding to any one battery module 400 with the first housing ribs 121 and second housing ribs 122 connected to each third housing boss 113, as shown in FIGS. 3 and 5. That is, the first housing boss 111 corresponding to any one battery module 400 may be within a first region (region A1 and region A2) defined by the housing rib 120 connecting the plurality of third housing bosses 113 corresponding to that battery module 400.

[0061] Therefore, the first housing boss 111 may be first connected to the battery module 400 inside the plurality of third housing bosses 113, thereby forming a primary connection between the housing 100 and the battery module 400. In this state, the third housing boss 113 may be fastened to the battery module 400 outside the first housing boss 111 using a fastening member such as a bolt, thereby easily aligning the housing 100 and the battery module 400 and firmly fastening the battery module 400 to the housing 100.

[0062] One or more second housing bosses 112 may be formed on the first housing surface 101 and may not be directly connected to the battery module 400. For example, the second housing boss 112 may include a plurality of second housing bosses 112. The first housing boss 111 and the third housing boss 113 may be connected to the battery module 400 by inserting the battery module 400 or via a fastening member, while the second housing boss 112 may not contact the battery module 400. When the battery module 400 is connected to the first housing boss 111 and the third housing boss 113, the second housing boss 112 may be spaced apart from the bottom surface of the battery module 400. The second housing boss 112 has a height H2. The height H2 is smaller than the height H1 of the first housing boss 111 and the height H3 of the third housing boss 113. The height H2 is larger than the height H of the housing rib 120.

[0063] The second housing boss 112 may be formed in the center of the housing 100. For example, a plurality of second housing bosses 112 may be formed in the center of the housing 100 in the width direction (e.g., the X-axis direction in FIG. 3). In one embodiment, two second housing bosses 112 may be formed in the center of the housing 100. The two second housing bosses 112 may be formed on the same line in the length direction (e.g., the Y-axis direction in FIG. 3) of the housing 100. The two second housing bosses 112 may be located below one of the battery modules 400 and may not overlap the battery module 400. The plurality of second housing bosses 112 may connect the first housing boss 111 and the third housing boss 113 corresponding to different battery modules 400 to each other.

[0064] The second housing boss 112 may be formed inside the first housing boss 111 and the third housing boss 113. For example, as shown in FIG. 3, two second housing bosses 112 may be formed inside a region A3 (second region) formed by connecting the plurality of third housing bosses 113 to each other. Here, as shown in FIGS. 3 and 5, the region A3 may also be a virtual region formed by connecting the plurality of third housing bosses 113 corresponding to different battery modules 400 and the first housing ribs 121 and second housing ribs 122 connected to each of the third housing bosses 113. That is, the plurality of second housing bosses 112 may be within the second region (region A3) defined by the plurality of third housing bosses 113 corresponding to the outer long sides of one battery module 400, the plurality of third housing bosses 113 corresponding to the outer long sides of another battery module 400, and the housing rib 120 connecting the plurality of third housing bosses 113. For example, the first region (regions A1 and A2) may include a plurality of first regions, and the second region (region A3) may be formed between the plurality of first regions and may contact the first regions. For example, as shown in FIG. 3, one long side of region A3 may contact the inner long side of region A1, and the other long side of region A3 may contact the inner long side of region A2.

[0065] The second housing boss 112 may be connected to a plurality of housing ribs 120. For example, as shown in FIGS. 3 and 4, a plurality of housing ribs 120 may be connected to the outer circumferential surface of the second housing boss 112. A plurality of housing ribs 120 (e.g., a first housing rib 121, a second housing rib 122, and a third housing rib 123) may be connected around the second housing boss 112 at equal or varying intervals. The plurality of housing ribs 120 may extend radially from the center of the second housing boss 112. The plurality of radially extending housing ribs 120 may be connected to other second housing bosses 112, the first housing boss 111 and / or the third housing boss 113, or the second housing surface 102. The second housing boss 112 may be connected to the first housing boss 111 and the second housing boss 112 corresponding to different battery modules 400, thereby dispersing loads and vibrations applied to the first housing boss 111 and the second housing boss 112. In one embodiment, the second housing boss 112 may not be directly connected to the battery module 400, but may be connected to the first housing boss 111 and the third housing boss 113 via a housing rib 120. For example, as shown in FIG. 3 , the second housing boss 112 may be connected to the adjacent first housing boss 111 via a first housing rib 121 and may be connected to the adjacent third housing boss 113 via a third housing rib 123.

[0066] The second housing boss 112 may be formed on an imaginary line like the first housing boss 111. In one embodiment, the center of the second housing boss 112 may be located on a line extending horizontally (e.g., in the X-axis direction in FIG. 3) from the center of the first housing boss 111.

[0067] One or more third housing bosses 113 may be formed on the first housing surface 101 and may be connected to the battery module 400. For example, the third housing boss 113 may include a plurality of third housing bosses 113. A plurality of third housing bosses 113 may be formed to correspond to one battery module 400, and at least a portion of the battery module 400 may be inserted into the third housing boss 113, or at least a portion of the third housing boss 113 may be inserted into the battery module 400 to connect the battery module 400 to the third housing boss 113. In one embodiment, the second fastening hole 430 of the battery module 400 may be inserted into the third housing boss 113. For example, as shown in FIG. 7 , the battery module 400 may include a second fastening hole 430 on the bottom surface, and the second fastening hole 430 may be formed to correspond to the third housing boss 113 and the first fastening hole 140 of the housing 100. The first fastening hole 140 may be formed on the bottom surface of the housing 100 and may communicate with the third housing boss 113. A lower end of the second fastening hole 430 may be inserted into the third housing boss 113 while the first fastening hole 140 and the second fastening hole 430 correspond to each other. A fastening member, such as a bolt, may be inserted into the lower part of the first fastening hole 140 to couple the housing 100 and the battery module 400. The third housing boss 113 has a height H3 from the first housing surface 101 to an upper end of the third housing boss 113. An inner bottom surface of the third housing boss 113 is higher than the first housing surface 101, and a lower end of the second fastening hole 430 may contact the inner bottom surface of the third housing boss 113. The second fastening hole 430 may have a diameter equal to or smaller than an inner diameter of the third housing boss 113 and may be inserted into the third housing boss 113.

[0068] The third housing bosses 113 may be formed to correspond to edges of the battery modules 400. For example, as shown in FIG. 3, three third housing bosses 113 may be formed to correspond to each end (e.g., a pair of long sides) of the battery modules 400 (indicated by dotted lines). A plurality (e.g., three) of the third housing bosses 113 corresponding to the long sides of any one battery module 400 may be formed on the same imaginary line in the longitudinal direction of the housing 100 (e.g., the Y-axis direction in FIG. 3). In one embodiment, six third housing bosses 113 correspond to one battery module 400, and a total of twelve third housing bosses 113 may be formed on the first housing surface 101. However, the number of third housing bosses 113 is not limited to twelve and may vary depending on the size and shape of the battery modules 400 and the battery pack 10.

[0069] The third housing boss 113 may be connected to a plurality of housing ribs 120. In one embodiment, as shown in FIGS. 3 and 4 , a plurality of housing ribs 120 may be connected to the outer circumferential surface of the third housing boss 113. The plurality of housing ribs 120 (e.g., first housing rib 121, second housing rib 122, and third housing rib 123) may be connected around the third housing boss 113 at equal or unequal intervals. The plurality of housing ribs 120 may extend radially from the center of the third housing boss 113. The plurality of radially extending housing ribs 120 may be connected to other third housing bosses 113, the first housing boss 111 and / or the second housing boss 112, or the second housing surface 102. Therefore, the third housing boss 113, the first housing boss 111, and the second housing boss 112 may be connected to each other by a plurality of housing ribs 120, thereby efficiently distributing the weight of the battery module 400 and increasing the rigidity of the first housing boss 111, the second housing boss 112, and the third housing boss 113.

[0070] The third housing boss 113 may be formed outside the first housing boss 111 and the second housing boss 112. For example, as shown in Fig. 3, the first housing boss 111 may be formed inside regions A1 and A2 formed by connecting a plurality of third housing bosses 113 corresponding to each battery module 400, and the plurality of third housing bosses 113 may be formed on outer edges of the regions A1 and A2.

[0071] The multiple housing ribs 120 connected to the housing protrusion 110 may extend from different portions of the housing protrusion 110. In one embodiment, as shown in FIG. 3, the multiple housing ribs 120 extending from the outer circumferential surface of any one housing protrusion 110 may extend from different portions of the housing protrusion 110, and may overlap or not be connected to adjacent housing ribs 120. Therefore, shock or vibration transmitted from any one housing rib 120 may be absorbed by the housing protrusion 110 and transmitted to other housing ribs 120, thereby increasing the durability of the housing ribs 120.

[0072] The housing ribs 120 may be formed on the first housing surface 101 and / or the second housing surface 102 to connect the plurality of housing protrusions 110 to one another. For example, the plurality of housing ribs 120 may extend along the first housing surface 101 around the plurality of housing protrusions 110 and connect adjacent housing protrusions 110. The plurality of housing ribs 120 may cross each other to form a lattice pattern or a net pattern. The housing ribs 120 may distribute the load and vibration of the battery module 400 applied to the housing protrusions 110, thereby increasing the durability of the housing 100 including the housing protrusions 110.

[0073] The housing rib 120 may be connected to the second housing surface 102. In one embodiment, as shown in Figures 3 and 4, the housing rib 120 extending from the housing protrusion 110 adjacent to the second housing surface 102 of the housing 100 may be connected to the second housing surface 102. Therefore, the load and vibration of the battery module 400 may be distributed to the second housing surface 102 via the housing protrusion 110 and the housing rib 120.

[0074] The housing ribs 120 may include a first housing rib 121 , a second housing rib 122 , and a third housing rib 123 .

[0075] A plurality of first housing ribs 121 may be formed on the first housing surface 101 and the second housing surface 102 and may be connected to the housing protrusions 110. For example, the first housing rib 121 may be a rib extending in the width direction of the housing 100 (e.g., the X-axis direction in FIG. 3 ) along the first housing surface 101. The first housing rib 121 may connect the first housing boss 111, the second housing boss 112, and the third housing boss 113 in the horizontal direction (e.g., the Y-axis direction). The first housing rib 121 has a height H, which may be smaller than the height H1 of the first housing boss 111, the height H2 of the second housing boss 112, and the height H3 of the third housing boss 113. The first housing rib 121 may extend from the outer circumferential surfaces of the first housing boss 111, the second housing boss 112, and the third housing boss 113 and cross the second housing rib 122. The first housing rib 121 may be connected to the second housing surface 102. For example, as shown in FIGS. 3 and 4 , portions of the first housing rib 121 extending from the first housing boss 111, the second housing boss 112, and the third housing boss 113 may extend along the first housing surface 101 and contact the second housing surface 102. Therefore, load and vibration transmitted along the first housing rib 121 may be distributed to the second housing surface 102.

[0076] A plurality of second housing ribs 122 may be formed on the first housing surface 101 and the second housing surface 102 and may be connected to the housing protrusions 110. In one embodiment, the second housing ribs 122 are ribs extending along the first housing surface 101 in the longitudinal direction of the housing 100 (e.g., the Y-axis direction in FIG. 3 ). The second housing ribs 122 may vertically connect the first housing boss 111, the second housing boss 112, and the third housing boss 113. The second housing ribs 122 may have the same height H as the first housing rib 121, and the height H may be smaller than the height H1 of the first housing boss 111, the height H2 of the second housing boss 112, and the height H3 of the third housing boss 113. The second housing ribs 122 may extend from the outer peripheral surfaces of the first housing boss 111, the second housing boss 112, and the third housing boss 113 and cross the first housing ribs 121 and the third housing ribs 123. The second housing rib 122 may be connected to the second housing surface 102. For example, as shown in FIGS. 3 and 4 , portions of the second housing rib 122 extending from the first housing boss 111, the second housing boss 112, and the third housing boss 113 may extend along the first housing surface 101 and contact the second housing surface 102. Therefore, load and vibration transmitted along the second housing rib 122 may be distributed to the second housing surface 102.

[0077] A plurality of third housing ribs 123 may be formed on the first housing surface 101 and the second housing surface 102 and may be connected to the housing protrusions 110. For example, the third housing ribs 123 may be ribs extending diagonally along the first housing surface 101 of the housing 100 (e.g., in the direction between the X-axis and Y-axis in FIG. 3). The third housing ribs 123 may diagonally connect the first housing boss 111, the second housing boss 112, and the third housing boss 113. The third housing ribs 123 may have the same height H as the first housing rib 121, and the height H may be smaller than the height H1 of the first housing boss 111, the height H2 of the second housing boss 112, and the height H3 of the third housing boss 113. The third housing rib 123 may extend from the outer peripheral surfaces of the first housing boss 111, the second housing boss 112, and the third housing boss 113 and cross the first housing rib 121 and the second housing rib 122. The third housing rib 123 may be connected to the second housing surface 102. For example, as shown in FIGS. 3 and 4 , portions of the third housing rib 123 extending from the first housing boss 111, the second housing boss 112, and the third housing boss 113 may extend along the first housing surface 101 and contact the second housing surface 102. Therefore, load and vibration transmitted along the third housing rib 123 may be distributed to the second housing surface 102.

[0078] The first housing rib 121, the second housing rib 122, and the third housing rib 123 extending from any one of the housing protrusions 110 may be connected to different portions of the outer circumferential surface of the housing protrusion 110. In one embodiment, as shown in FIG. 3 , the first housing rib 121, the second housing rib 122, and the third housing rib 123 may be connected to the outer circumferential surfaces of the first housing boss 111, the second housing boss 112, and the third housing boss 113, respectively. The first housing rib 121, the second housing rib 122, and the third housing rib 123 extending from any one of the first housing boss 111, the second housing boss 112, and the third housing boss 113 may be connected to different portions of the outer circumferential surfaces of the first housing boss 111, the second housing boss 112, and the third housing boss 113. Therefore, impact or vibration transmitted from any one of the first housing rib 121, the second housing rib 122, and the third housing rib 123 is absorbed by the housing protrusion 110 and transmitted to the other first housing rib 121, the second housing rib 122, and the third housing rib 123, thereby increasing the durability of the first housing rib 121, the second housing rib 122, and the third housing rib 123.

[0079] The housing 100 may further include an attachment guide 130. One or more attachment guides 130 may be formed on the first housing surface 101 and the second housing surface 102 and may guide the attachment position of the battery module 400. For example, a plurality of attachment guides 130 may be formed on corners of the housing 100. For example, as shown in FIGS. 3 and 4 , two attachment guides 130 may be formed on each of the left and right corners of the housing 100. The attachment guides 130 may separate the battery module 400 from the second housing surface 102 so that the corners of the battery module 400 do not come into direct contact with the second housing surface 102. In addition, the attachment guides 130 may align the battery module 400 when the battery module 400 is coupled to the housing 100.

[0080] The housing 100 may further include contact protrusions 150. One or more contact protrusions 150 may be formed on the housing 100. In one embodiment, as shown in FIGS. 3 and 8 , the contact protrusions 150 may be formed between the first housing surface 101 and the second housing surface 102 and may extend upward (e.g., in the Z-axis direction) from the first housing surface 101 along the second housing surface 102. In one embodiment, the contact protrusions 150 have a height H4. The height H4 may be the same as or lower than the height of the second housing surface 102 and may be the same as or lower than the height of the bus bar 500. When the battery module 400 is inserted into the housing 100, the contact protrusions 150 may come into contact with the bus bar 500 fastened to the battery module 400. Therefore, the contact protrusions 150 tightly attach the bus bar 500 to the battery module 400, and an additional component for fixing the bus bar 500 may not be formed on the battery module 400.

[0081] The contact protrusions 150 may be formed between the guide protrusions 450 of the battery module 400. For example, as shown in FIG. 9 , the contact protrusions 150 may be formed between a pair of guide protrusions 450 formed on the side of the battery module 400 and may apply pressure to the bus bar 500 inserted between the pair of guide protrusions 450. For example, the contact protrusions 150 may be formed on a horizontal line passing through the center of a connector 600 that connects the bus bar 500 to the battery module 400. For example, the connector 600 may include a conductive material such as metal and electrically connect the cell tap and the bus bar 500. The bus bar 500 has a width W5, which may be the same as the distance between the pair of guide protrusions 450.

[0082] The contact protrusions 150 may have a tapered shape. In one embodiment, the contact protrusions 150 may have a shape that gradually narrows from bottom to top (e.g., in the Z-axis direction). For example, as shown in FIG. 8 , the contact protrusions 150 may have a width W4a at their bottom end (e.g., the width in the longitudinal direction of the housing 100 or the width in the Y-axis direction in FIG. 8 ) and a width W4b at their top end, where W4b is smaller than W4a. The contact protrusions 150 may have a shape in which the surface facing the battery module 400 is inclined. In one embodiment, as shown in FIG. 8 , the surface of the contact protrusions 150 opposite the second housing surface 102 may be inclined inward toward the top. Therefore, when the battery module 400 is inserted into the housing 100, the bus bar 500 does not interfere with the top end of the contact protrusions 150, and the battery module 400 may be stably inserted into the housing 100. In addition, the lower portion of the contact protrusion 150 may press the bus bar 500 to bring the bus bar 500 into close contact with the battery module 400 .

[0083] The housing 100 may further include a pocket 160. One or more pockets 160 may be formed in the housing 100. In one embodiment, as shown in FIGS. 3 and 10 , the pocket 160 may be formed between the first housing surface 101 and the second housing surface 102, on the second housing surface 102 opposite to the second housing surface 102 on which the contact protrusions 150 are formed. The pocket 160 may hold and support the substrate S. The substrate S may be connected to an LED panel exposed to the outside of the housing 100 to display the current status of the battery pack 10, such as the remaining battery charge.

[0084] The pocket 160 may include a partition 161 , a stopper 162 , a first insertion guide 163 and a second insertion guide 164 .

[0085] The partition wall 161 may extend from the first housing surface 101 and the second housing surface 102 and form a space between the first housing surface 101 and the second housing surface 102 to accommodate the substrate S. In one embodiment, as shown in FIG. 11 , the stopper 162 may extend from the second housing surface 102 toward the space between the partition wall 161 and the second housing surface 102. The stopper 162 may be formed in the partition wall 161 to guide the position of the substrate S when it is inserted into the partition wall 161 and prevent the substrate S from colliding with the second housing surface 102. When the substrate S is inserted into the partition wall 161, the stopper 162 may be spaced apart from the substrate S without contacting it. The stopper 162 may be spaced apart from the inner surface of the partition wall 161 and the first and second insertion guides 163 and 164.

[0086] The first insertion guide 163 and the second insertion guide 164 may fix the substrate S within the partition wall 161. In one embodiment, as shown in FIG. 11 , one or more first insertion guides 163 and second insertion guides 164 may be formed on the second housing surface 102 and extend toward the space between the partition wall 161 and the second housing surface 102. The first insertion guides 163 may be formed in pairs facing each other on the inner surfaces of the second housing surface 102 and the partition wall 161. The minimum distance between the first insertion guides 163 formed on the second housing surface 102 and the inner surfaces of the partition wall 161 is the same as the thickness of the substrate S. The substrate S may be inserted and fixed between the first insertion guides 163 formed on the inner surfaces of the second housing surface 102 and the partition wall 161. For example, as shown in FIG. 11 , the first insertion guides 163 may include two pairs of first insertion guides 163.

[0087] One or more second insertion guides 164 may be formed on the second housing surface 102 and may extend toward the space between the partition wall 161 and the second housing surface 102. In one embodiment, the second insertion guides 164 may have the same shape as the first insertion guides 163 formed on the second housing surface 102. The second insertion guides 164 may be formed between adjacent first insertion guides 163 and may contact and support the substrate S. The height of the first insertion guides 163 and the second insertion guides 164 may be lower than the height of the second housing surface 102. The first insertion guides 163 and the second insertion guides 164 may have a downwardly sloping shape. For example, as shown in FIG. 10 , the first insertion guides 163 and the second insertion guides 164 may include a sloping portion that gradually protrudes from the upper end to the lower end. The substrate S may be naturally placed within the partition wall 161 as the sloping portion comes into contact with the sloping portion.

[0088] The outer cover 200 is placed on the inner cover 300 so as to cover the inner cover 300 , and can be detachably connected to the housing 100 .

[0089] The inner cover 300 may be disposed on the housing 100 and cover the open top surface of the housing 100. In one embodiment, as shown in FIG. 2 , when the battery module 400 is inserted into the housing 100, the inner cover 300 may be positioned on the battery module 400 and may be connected to the housing 100 and the battery module 400 via fastening members such as bolts.

[0090] The inner cover 300 may include a first cover surface 301 and a second cover surface 302 .

[0091] The first cover surface 301 may include an upper surface of the inner cover 300 (when the outer cover 200 is set as the upper side). In one embodiment, as shown in Figures 13 and 14, the first cover surface 301 also corresponds to the inner upper surface of the inner cover 300 and faces the battery module 400. A cover protrusion 310, a cover rib 320, and a wing portion 330 may be formed on the first cover surface 301.

[0092] The second cover surface 302 may include a side surface of the inner cover 300. In one embodiment, as shown in Figures 13 and 14, the second cover surface 302 may extend along an edge of the first cover surface 301 and correspond to an inner side surface of the inner cover 300. The second cover surface 302 may extend in a height direction (e.g., the Z-axis direction in Figure 14) at the edge of the first cover surface 301. The second cover surface 302 may be formed with a cover protrusion 310, a cover rib 320, and a wing portion 330.

[0093] The inner cover 300 may include a cover protrusion 310 and a cover rib 320 .

[0094] One or more cover protrusions 310 may be formed on the first cover surface 301 and the second cover surface 302 and may be connected to the battery module 400. In one embodiment, the cover protrusions 310 may extend from the first cover surface 301 and the second cover surface 302 in a height direction (e.g., the Z-axis direction in FIG. 14 ) and communicate with an outer upper surface of the inner cover 300. In one embodiment, as shown in FIG. 12 , with the inner cover 300 positioned such that the cover protrusions 310 correspond to the second coupling protrusions 440, the second coupling protrusions 440 may be inserted into the cover protrusions 310, or the cover protrusions 310 may be inserted into the second coupling protrusions 440. Then, a fastening member, such as a bolt, may be inserted into the cover protrusions 310 from the outer upper surface of the inner cover 300 to fasten the cover protrusions 310 and the second coupling protrusions 440 together.

[0095] The cover protrusion 310 may include a first cover boss 311 and a second cover boss 312 .

[0096] One or more first cover bosses 311 may be formed on the first cover surface 301 and may be coupled to the second coupling protrusions 440 of the battery modules 400. In one embodiment, as shown in FIG. 13 , a plurality of first cover bosses 311 may be formed on the inner side of the inner cover 300 in the width direction (e.g., the X-axis direction in FIG. 13 ) and may be coupled to the second coupling protrusions 440, respectively. For example, the plurality of first cover bosses 311 may be formed in two rows in the length direction (e.g., the Y-axis direction in FIG. 13 ) of the inner cover 300, and the first cover bosses 311 included in each row may be coupled to different battery modules 400. For example, the first cover bosses 311 included in each row may be coupled to the second coupling protrusions 440 formed on the inner long sides of different battery modules 400, respectively. The first cover bosses 311 may have a hollow cylindrical shape. One end of the first cover boss 311 may be inserted into or surround the second coupling protrusion 440 , and the other end may communicate with the outer upper surface of the inner cover 300 .

[0097] The first cover boss 311 may be connected to a plurality of cover ribs 320. In one embodiment, the first cover boss 311 may have a plurality of cover ribs 320 extending from its outer circumferential surface. For example, as shown in FIG. 14 , the plurality of cover ribs 320 (e.g., first cover rib 321 and second cover rib 322) may be arranged at equal intervals along the outer circumferential surface of the first cover boss 311. For example, the plurality of cover ribs 320 (e.g., four) may extend in different directions from the outer circumferential surface of the first cover boss 311 at 90° angles. The first cover bosses 311 may be connected to each other via the cover ribs 320. Therefore, load and vibration applied to the first cover boss 311 may be dispersed via the cover ribs 320.

[0098] One or more second cover bosses 312 may be formed on the second cover surface 302 and may be coupled to the second coupling protrusions 440 of the battery modules 400. In one embodiment, as shown in FIG. 13 , a plurality of second cover bosses 312 may be formed on the outer side of the inner cover 300 in the width direction (e.g., the X-axis direction in FIG. 13 ) and may be coupled to the second coupling protrusions 440, respectively. For example, the plurality of second cover bosses 312 may be formed in two rows in the length direction (e.g., the Y-axis direction in FIG. 13 ) of the inner cover 300, and the second cover bosses 312 included in each row may be coupled to different battery modules 400. For example, the second cover bosses 312 included in each row may be coupled to the second coupling protrusions 440 formed on the outer long sides of different battery modules 400, respectively. The second cover bosses 312 may have a hollow cylindrical shape. One end of the second cover boss 312 may be inserted into or surround the second coupling protrusion 440 , and the other end may communicate with the outer upper surface of the inner cover 300 .

[0099] The second cover boss 312 may be connected to a plurality of cover ribs 320. In one embodiment, the second cover boss 312 may have a plurality of cover ribs 320 extending from its outer circumferential surface. For example, as shown in FIG. 14 , the plurality of cover ribs 320 (e.g., first cover rib 321 and second cover rib 322) may be arranged at equal intervals along the outer circumferential surface of the second cover boss 312. For example, the plurality of cover ribs 320 (e.g., four) may extend in different directions from the outer circumferential surface of the second cover boss 312 at 90° angles. The respective second cover bosses 312 may be connected to each other via the cover ribs 320. Therefore, load and vibration applied to the second cover boss 312 may be dispersed via the cover ribs 320.

[0100] The plurality of cover ribs 320 connected to the cover protrusion 310 may extend from different portions of the cover protrusion 310. In one embodiment, as shown in Fig. 13, the plurality of cover ribs 320 extending from the outer circumferential surface of any one of the cover protrusions 310 may extend from different portions of the cover protrusion 310 and may not overlap or be connected to adjacent cover ribs 320. Therefore, shock or vibration transmitted from any one of the cover ribs 320 is absorbed by the cover protrusion 310 and transmitted to the other cover ribs 320, thereby increasing the durability of the cover ribs 320.

[0101] The cover ribs 320 may be formed on the first cover surface 301 and / or the second cover surface 302 and may connect the plurality of cover protrusions 310 to one another. In one embodiment, the plurality of cover ribs 320 may extend around the plurality of cover protrusions 310 along the first cover surface 301 and the second cover surface 302, respectively, and connect adjacent cover protrusions 310. The plurality of cover ribs 320 may cross each other to form a lattice pattern or a net pattern. The cover ribs 320 may disperse vibration of the battery module 400 or external impact of the battery pack 10 applied to the cover protrusions 310, thereby increasing the durability of the inner cover 300 including the cover protrusions 310. Furthermore, the cover ribs 320 may disperse torque and impact generated when the inner cover 300 is fastened to the battery module 400.

[0102] The cover rib 320 may be connected to the second cover surface 302. In one embodiment, as shown in Figures 13 and 14, the cover rib 320 extending to the cover protrusion 310 adjacent to the second cover surface 302 of the housing 100 may be connected to the second cover surface 302. Therefore, the load and vibration of the battery module 400 may be distributed to the second cover surface 302 via the cover protrusion 310 and the cover rib 320.

[0103] The cover rib 320 may include a first cover rib 321 and a second cover rib 322 .

[0104] A plurality of first cover ribs 321 may be formed on the first cover surface 301 and the second cover surface 302 and may be connected to the cover protrusions 310. In one embodiment, the first cover ribs 321 may also be ribs extending in the width direction of the inner cover 300 (e.g., the X-axis direction in FIG. 13 ) along the first cover surface 301. The first cover ribs 321 may horizontally connect the first cover bosses 311 and the second cover bosses 312. The first cover ribs 321 may extend from the outer circumferential surfaces of the first cover bosses 311 and the second cover bosses 312 and cross the second cover ribs 322. The first cover ribs 321 may be connected to the second cover surface 302. For example, as shown in FIGS. 13 and 14 , portions of the first cover ribs 321 extending from the first cover bosses 311 and the second cover bosses 312 may extend along the first cover surface 301 and contact the second cover surface 302. Therefore, the load and vibration transmitted along the first cover rib 321 can be dispersed to the second cover surface 302 .

[0105] A plurality of second cover ribs 322 may be formed on the first cover surface 301 and the second cover surface 302 and may be connected to the cover protrusions 310. In one embodiment, the second cover ribs 322 are ribs extending along the first cover surface 301 in the longitudinal direction of the inner cover 300 (e.g., the Y-axis direction in FIG. 13 ). The second cover ribs 322 may vertically connect the first cover bosses 311 and the second cover bosses 312. The second cover ribs 322 may extend from the outer circumferential surfaces of the first cover bosses 311 and the second cover bosses 312 and cross the first cover ribs 321. The second cover ribs 322 may be connected to the second cover surface 302. For example, as shown in FIGS. 13 and 14 , a portion of the second cover rib 322 extending to the first cover boss 311 and the second cover boss 312 may extend along the first cover surface 301 and contact the second cover surface 302. Therefore, the load and vibration transmitted along the second cover rib 322 can be dispersed to the second cover surface 302 .

[0106] The first cover rib 321 and the second cover rib 322 extending from any one of the cover protrusions 310 may be connected to different portions of the outer circumferential surface of the cover protrusion 310. In one embodiment, as shown in FIG. 13 , the first cover rib 321 and the second cover rib 322 may be connected to the outer circumferential surfaces of the first cover boss 311 and the second cover boss 312, respectively. The first cover rib 321 and the second cover rib 322 extending from any one of the first cover boss 311 and the second cover boss 312 may be connected to different portions of the outer circumferential surfaces of the first cover boss 311 and the second cover boss 312. Therefore, impact or vibration transmitted from any one of the first cover rib 321 and the second cover rib 322 is absorbed by the housing protrusion 110 and transmitted to the other first cover rib 321 and the second cover rib 322, thereby increasing the durability of the first cover rib 321 and the second cover rib 322.

[0107] The inner cover 300 may further include wing portions 330. In one embodiment, as shown in Fig. 14, the wing portions 330 are portions where the cover ribs 320 are connected to the cover protrusions 310, and may have a height that is higher than the cover ribs 320 but lower than the cover protrusions 310. For example, as shown in Fig. 14, the cover ribs 320 may contact the outer circumferential surface of the cover protrusions 310 and extend upward along the height direction. The wing portions 330 may firmly support the connection portions between the cover ribs 320 and the cover protrusions 310, thereby increasing the durability of the cover protrusions 310 and the cover ribs 320.

[0108] The wing portion 330 may include a first wing portion 331 and a second wing portion 332. The first wing portion 331 may be formed on the outer peripheral surface of the first cover boss 311, and the second wing portion 332 may be formed on the outer peripheral surface of the second cover boss 312. The first wing portion 331 may have a greater height than the second wing portion 332.

[0109] The battery module 400 includes a battery cell C, and one or more battery modules 400 may be included in the battery pack 10. In one embodiment, the battery module 400 includes a plurality of battery cells C, and two battery modules 400 are included in the housing 100. Each battery module 400 may be coupled to a housing protrusion 110 formed on the housing 100.

[0110] The battery module 400 may include an insertion hole 410 , a first coupling protrusion 420 , a second fastening hole 430 , a second coupling protrusion 440 , and a guide protrusion 450 .

[0111] The insertion holes 410 hold and support the battery cells C, and a plurality of the insertion holes 410 may be formed corresponding to the number of the battery cells C. The first coupling protrusions 420 may be formed on the bottom surface of the battery module 400 and inserted into the first housing bosses 111. For example, as shown in FIG. 6, the first coupling protrusions 420 may have a hollow cylindrical shape and a height H2. The housing 100 and the battery module 400 may be coupled together by inserting the first coupling protrusions 420 into the first housing bosses 111. Although FIG. 6 illustrates the first coupling protrusions 420 being formed below the insertion holes 410, the present invention is not limited thereto.

[0112] The second fastening holes 430 may be formed on the bottom surface of the battery module 400 to correspond to the first fastening holes 140 of the housing 100. In one embodiment, as shown in FIG. 7 , the second fastening holes 430 may be inserted into the third housing bosses 113. The second fastening holes 430 may have a height corresponding to the height of the inner surface of the third housing bosses 113 (e.g., the height from the inner bottom surface to the upper end of the third housing bosses 113). The second fastening holes 430 may communicate with the first fastening holes 140 and may include threads on the inside. Therefore, a fastening member, such as a bolt, inserted through the first fastening holes 140 may be coupled into the second fastening holes 430.

[0113] One or more second coupling protrusions 440 may be formed on the upper portion of the battery module 400 and may be connected to the inner cover 300. In one embodiment, as shown in FIG. 12 , a plurality of second coupling protrusions 440 may be formed to correspond to the long sides of each battery module 400. For example, six second coupling protrusions 440 may be formed on one battery module 400, with three second coupling protrusions 440 formed on each long side of the battery module 400. The second coupling protrusions 440 may correspond to the cover protrusions 310 of the inner cover 300 and may be connected to the cover protrusions 310 via a fastening member such as a bolt. For example, the second coupling protrusions 440 may have a hollow cylindrical shape and may include a thread on the inside to fasten a fastening member.

[0114] The guide protrusions 450 may be formed on the side of the battery module 400 to fix the bus bar 500. In one embodiment, as shown in FIG. 9 , two guide protrusions 450 may be formed spaced apart from each other on the side of the battery module 400. The bus bar 500 may be inserted between the two guide protrusions 450. In this state, when the battery module 400 is placed in the housing 100, the contact protrusions 150 may press the bus bar 500 toward the side of the battery module 400, thereby fixing the bus bar 500 to the battery module 400.

[0115] While the present invention has been described based on the embodiments shown in the drawings, these are merely examples. Those skilled in the art will appreciate that various modifications and equivalent embodiments are possible from the embodiments. Therefore, the true technical scope of protection of the present invention should be determined based on the claims. [Explanation of symbols]

[0116] 10 Battery pack 100 Housing 101 First housing surface 102 Second housing surface 110 housing protrusion 111 1st Housing Boss 112 Second Housing Boss 113 3rd Housing Boss 120 Housing Rib 121 First housing rib 122 Second housing rib 123 Third housing rib 130 Installation Guide 140 First Closing Hole 150 Contact protrusion 160 pockets 161 Bulkhead 162 Stopper 163 First Insertion Guide 164 Second Insertion Guide 200 outer cover 300 Inner cover 301 First cover surface 302 Second cover surface 310 Cover protrusion 311 1st cover boss 312 Second cover boss 320 Cover Rib 321 First cover rib 322 Second cover rib 330 Wing 331 First wing 332 Second wing 400 Battery Module 410 Insertion Hole 420 1st connecting protrusion 430 2nd Closing Hole 440 2nd connecting protrusion 450 Guide protrusion 500 busbar 600 Connector S board C Battery Cell

Claims

1. Housing and a battery module within the housing; The housing includes: a housing protrusion formed on the housing; housing ribs extending in different directions from the housing protrusion, A battery pack, wherein the housing ribs formed on any one of the housing protrusions are spaced apart from each other along a circumferential direction of the housing protrusion.

2. The housing includes: a first housing surface including a bottom surface of the housing; a second housing surface extending in a height direction along an edge of the first housing surface, The battery pack of claim 1 , wherein the housing rib is coupled to the second housing surface.

3. The battery pack according to claim 1 , wherein the housing rib extending from any one of the housing protrusions is connected to another adjacent housing protrusion.

4. The battery pack according to claim 1 , wherein the housing protrusion includes a hollow cylindrical shape and is coupled to at least a portion of a bottom surface of the battery module.

5. the battery module includes a first coupling protrusion on a bottom surface thereof; The battery pack according to claim 4 , wherein the first coupling protrusion is inserted into the housing protrusion.

6. the housing protrusion includes a first housing boss; The first coupling protrusions are inserted into the first housing bosses, The battery pack according to claim 5 , wherein a height of the first coupling protrusion is smaller than a height of the first housing boss.

7. The housing includes a first fastening hole on a bottom surface thereof; the battery module includes a second fastening hole on a bottom surface corresponding to the first fastening hole; The battery pack according to claim 4 , wherein the second fastening hole is inserted into the housing protrusion.

8. the housing protrusion includes a third housing boss; The second fastening holes are inserted into the third housing bosses, The battery pack according to claim 7 , wherein a fastening member is inserted into the second fastening hole through the first fastening hole.

9. The housing protrusion is A first housing boss; A second housing boss; a third housing boss; The battery pack according to claim 1 , wherein the first housing boss and the third housing boss are connected to the battery module, and the second housing boss is not connected to the battery module.

10. The battery pack according to claim 9 , wherein the first housing boss and the third housing boss are inserted into the battery module, and the second housing boss is spaced apart from a bottom surface of the battery module.

11. The battery pack according to claim 9 , wherein the second housing boss is located at a center in a width direction of the housing.

12. the third housing boss includes a plurality of third housing bosses, The battery pack according to claim 9 , wherein the plurality of third housing bosses are formed to correspond to long sides of the battery module.

13. 10. The battery pack according to claim 9, wherein the first housing boss corresponding to any one of the battery modules is located within a first region defined by the plurality of third housing bosses corresponding to that battery module and housing ribs connecting the plurality of third housing bosses.

14. the first housing boss includes a plurality of first housing bosses, The battery pack according to claim 13 , wherein the plurality of first housing bosses are formed to correspond to central portions of the corresponding battery modules.

15. The battery module includes a plurality of battery modules, the second housing boss includes a plurality of second housing bosses, The battery pack of claim 13 , wherein the plurality of second housing bosses connect the first housing boss and the third housing boss corresponding to different battery modules to each other.

16. 16. The battery pack of claim 15, wherein the plurality of second housing bosses are located within a second region defined by the plurality of third housing bosses corresponding to the outer long side portions of any one of the battery modules, the plurality of third housing bosses corresponding to the outer long side portions of another of the battery modules, and a housing rib connecting the plurality of third housing bosses.

17. the first region includes a plurality of first regions, The battery pack of claim 16 , wherein the second regions are formed between a plurality of first regions and are in contact with the first regions, respectively.

18. The housing rib is a first housing rib extending horizontally; a second housing rib extending vertically; 3. The battery pack according to claim 2, further comprising: a third housing rib extending diagonally between the first housing rib and the second housing rib.

19. The battery pack of claim 18 , wherein the first housing rib, the second housing rib, and the third housing rib are coupled to the second housing surface.

20. The battery pack according to claim 1 , wherein the height of the housing rib is lower than the height of the housing protrusion.

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