Battery pack

Abstract

A battery pack includes: a housing; a plurality of battery cells in the housing and each including a vent hole; a first bracket in the housing and configured to support one side of each of the plurality of battery cells; a first connection member facing the first bracket and electrically connected to the plurality of battery cells; and a guide in the first connection member and configured to guide a flow of emissions discharged from the exhaust hole. According to one or more embodiments of the present disclosure, a first connection member has a structure having a minimum or reduced overlapping area with a vent hole, and a guide member is formed in the first connection member such that emissions generated by a battery cell can be smoothly or easily discharged if the battery cell burns.

Description

Technical Field

[0001] Aspects of embodiments of the present disclosure relate to a battery pack. Background Art

[0002] Unlike primary batteries that cannot be recharged, secondary batteries are batteries that can be recharged and discharged. Low-capacity secondary batteries can be used in portable small electronic devices (such as smart phones, feature phones, notebook computers, digital cameras and camcorders), and high-capacity secondary batteries are widely used as power batteries for driving motors and hybrid vehicles or electric vehicles. Secondary batteries include an electrode assembly including a positive electrode and a negative electrode, a housing for accommodating the electrode assembly, electrode terminals connected to the electrode assembly, etc.

[0003] Secondary batteries can be used as battery packs formed by connecting multiple unit cells in series and / or parallel to provide high energy density. A battery pack can be formed by connecting the electrode terminals of multiple unit cells to each other to meet the required power output and realize a high-power secondary battery for, for example, electric vehicles.

[0004] The above information disclosed in the art forming the background of the present disclosure is provided to enhance understanding of the background of the present disclosure and therefore may contain information that does not constitute related art. Summary of the Invention

[0005] According to aspects of an embodiment of the present disclosure, there is provided a battery pack capable of smoothly or easily discharging emissions generated from battery cells if the battery cells burn, and capable of preventing (preventing or substantially preventing) chain combustion of the battery cells.

[0006] The above and other aspects and features of the present disclosure will be described in or will be apparent from the following description of some embodiments of the present disclosure.

[0007] According to one or more embodiments of the present disclosure, a battery pack includes: a housing; a plurality of battery cells in the housing and each including an exhaust hole; a first bracket in the housing and configured to support one side of each of the plurality of battery cells; a first connecting member facing the first bracket and electrically connected to the plurality of battery cells; and a guide in the first connecting member and configured to guide the flow of exhaust discharged from the exhaust hole.

[0008] The first bracket may include: a first bracket body; a plurality of first insertion holes passing through the first bracket body, and the plurality of battery cells are respectively inserted into the plurality of first insertion holes; and a transfer hole passing through the first bracket body, connected to the first insertion holes, and facing the exhaust hole.

[0009] The first bracket body may include: a first separator arranged around (e.g., surrounding) the first insertion hole; and a second separator extending from the first separator and arranged around (e.g., surrounding) the transfer hole, wherein the second separator may protrude outward from a battery cell among the plurality of battery cells.

[0010] Each of the plurality of battery cells may include: a cell shell accommodating an electrode assembly; and an upper cover coupled to the cell shell, with the exhaust hole extending in the upper cover, and the first connecting member may include: a tab body located on the first bracket body; and a connecting tab extending from the tab body and connected to the upper cover.

[0011] The connecting terminal tab may include: a first extension portion extending from the terminal tab body and facing the transmission hole; a second extension portion extending from the first extension portion and inserted into the transmission hole; and a third extension portion extending from the second extension portion and contacting the upper cover.

[0012] The upper cover may include: an inner body; an outer body coaxially arranged with the inner body; and a plurality of bridging portions between the inner body and the outer body and configured to support the inner body relative to the outer body, and the exhaust hole may be between adjacent bridging portions among the plurality of bridging portions.

[0013] A distance between the first bracket body and the second extension portion may be greater than a distance between the first bracket body and the inner body.

[0014] The length of the second extension portion may be greater than or equal to 1 mm and less than or equal to 3 mm.

[0015] The third extension may have a width smaller than a diameter of the inner body.

[0016] An end portion of the third extension may be on the inner body.

[0017] The guide may include a cavity between the first bracket body and the connection tab; and a slit extending through the connection tab and connected to the cavity and the transfer hole.

[0018] An opposite side of the chamber may be open and connected to the transfer hole.

[0019] The slit may extend such that a longitudinal direction of the slit is parallel to a longitudinal direction of the connecting tab.

[0020] The width of the slit may be greater than or equal to 0.8 mm and less than or equal to 1.2 mm.

[0021] The slit may include: a first slit passing through the first extension; a second slit connected to the first slit and passing through the second extension; and a third slit connected to the second slit and passing through the third extension.

[0022] One end portion of the first slot may face the outer body.

[0023] The battery pack may further include: a second bracket spaced apart from the first bracket and configured to support the other side of each of the plurality of battery cells; and a protective member between the first bracket and the second bracket and arranged around (e.g., encircling) each of the plurality of battery cells.

[0024] The protection member may include a first protection member extending from the first bracket toward the second bracket; and a second protection member extending from the second bracket toward the first bracket and contacting the first protection member.

[0025] The battery pack may further include a plurality of blocking members each facing a battery cell among the plurality of battery cells and configured to cover the vent hole.

[0026] When the exhaust is discharged from the exhaust hole, a corresponding blocking member of the plurality of blocking members may be separated from the exhaust hole. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] The accompanying drawings attached to this specification illustrate some embodiments of the present disclosure and, together with the detailed description of the present disclosure, further describe aspects and features of the present disclosure. However, the present disclosure should not be construed as being limited to the accompanying drawings.

[0028] Figure 1 is an exploded perspective view schematically illustrating a configuration of a battery pack according to an embodiment of the present disclosure;

[0029] Figure 2 This is a schematic illustration Figure 1 A cross-sectional view of a configuration of a battery pack;

[0030] Figure 3 is a perspective view schematically illustrating a configuration of a battery cell according to an embodiment of the present disclosure;

[0031] Figure 4 This is a schematic illustration Figure 3 A cross-sectional view of the configuration of a battery cell;

[0032] Figure 5is a perspective view schematically illustrating the configuration of a first connecting member and a guide member according to an embodiment of the present disclosure;

[0033] Figure 6 This is a schematic illustration Figure 5 a plan view of an arrangement of a first connecting member and a guide member;

[0034] Figure 7 This is a schematic illustration Figure 5 a front sectional view of an arrangement of a first connecting member and a guide member;

[0035] Figure 8 This is a schematic illustration Figure 5 a side sectional view of an arrangement of a first connecting member and a guide member;

[0036] Figure 9 and Figure 10 is a view schematically illustrating an operation process of a battery pack according to an embodiment of the present disclosure;

[0037] Figure 11 is a view schematically illustrating a configuration of a battery pack according to another embodiment of the present disclosure;

[0038] Figure 12 This is a schematic illustration Figure 11 A view of the operating status of the battery pack;

[0039] Figure 13 is a view schematically illustrating a configuration of a battery pack according to another embodiment of the present disclosure; and

[0040] Figure 14 This is a schematic illustration Figure 13 A view of the operating status of the battery pack. DETAILED DESCRIPTION

[0041] Herein, some embodiments of the present disclosure will be described in more detail with reference to the accompanying drawings. The terms or words used in this specification and claims should not be interpreted as being limited to the ordinary meaning or dictionary meaning, and should be interpreted as meanings and concepts consistent with the technical idea of ​​the present disclosure based on the principle that the inventor can appropriately define the concept of the term for his / her own lexicon compiler.

[0042] The embodiments described in this specification and the configurations shown in the drawings are provided as some example embodiments of the present disclosure and do not necessarily represent all technical ideas, aspects, and features of the present disclosure. Accordingly, it should be understood that at the time of filing this application, various equivalents and modifications that can replace or modify the embodiments described herein may exist.

[0043] It should be understood that when an element or layer is referred to as being “on,” “connected to,” or “coupled to” another element or layer, it can be directly on, directly connected to, or coupled to the other element or layer, or one or more intervening elements or layers may be present. When an element or layer is referred to as being “directly on,” “directly connected to,” or “directly coupled to” another element or layer, there are no intervening elements or layers. For example, when a first element is described as being “coupled to” or “connected to” a second element, the first element can be directly coupled or connected to the second element, or the first element can be indirectly coupled or connected to the second element via one or more intervening elements.

[0044] In the drawings, for clarity of illustration, the sizes of various elements, layers, etc. may be exaggerated. The same reference numerals indicate identical or similar elements. As used herein, the term "and / or" includes any one and all combinations of one or more associated listed items. In addition, the use of "may" when describing the embodiments of the present disclosure relates to "one or more embodiments of the present disclosure". Expressions such as "at least one of..." and "any one of..." modify the entire list of elements when following a list of elements, rather than modifying the individual elements in the list. When phrases such as "at least one of A, B, and C," "at least one of A, B, or C," "at least one selected from the group of A, B, and C," or "at least one selected from the middle of A, B, and C" are used to indicate a list of elements A, B, and C, the phrase may refer to any one of A, B, and C and all suitable combinations or subsets, such as A, B, C, A and B, A and C, B and C, or A and B and C. As used herein, the term "use" may be considered synonymous with the term "utilize." As used herein, the terms "substantially," "approximately," and similar terms are used as terms of approximation rather than terms of degree, and are intended to take into account the inherent variation in measurements or calculations that one of ordinary skill in the art would recognize.

[0045] It should be understood that although the terms "first," "second," "third," etc. may be used herein 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. Thus, a first element, component, region, layer, or section discussed below may be referred to as a second element, component, region, layer, or section without departing from the teachings of the example embodiments.

[0046] For ease of description, spatial relative terms (such as "below," "beneath," "down," "above," "on," etc.) may be used herein to describe the relationship of an element or feature to another element or feature as shown in the figures. It should be understood that spatial relative terms are intended to encompass different orientations of the device in use or operation in addition to the orientation depicted in the figures. For example, if the device in the figure is flipped, the element described as being "below" or "beneath" other elements or features will then be oriented as being "above" or "above" other elements or features. Therefore, the term "below" can encompass both above and below orientations. The device can be oriented in other ways (e.g., rotated 90 degrees or in other orientations), and the spatial relative descriptors used herein should be interpreted accordingly.

[0047] The terms used herein are for the purpose of describing the embodiments of the present disclosure and are not intended to limit the present disclosure. As used herein, the singular form "a" is intended to also include the plural form, unless the context clearly indicates otherwise. It should be further understood that the terms "comprise" and / or "comprising" when used in this specification specify the presence of the features, integers, steps, operations, elements and / or parts, but do not exclude the presence or addition of one or more other features, integers, steps, operations, elements, parts and / or groups thereof.

[0048] In addition, any numerical range disclosed and / or listed herein is intended to include all subranges of the same numerical precision contained in the listed range. For example, the range of "1.0 to 10.0" is intended to include all subranges between the listed minimum value 1.0 and the listed maximum value 10.0 (and including the listed minimum value 1.0 and the listed maximum value 10.0), that is, all subranges (e.g., such as 2.4 to 7.6) with a minimum value equal to or greater than 1.0 and a maximum value equal to or less than 10.0. Any maximum numerical limit listed herein is intended to include all lower numerical limits contained therein, and any minimum numerical limit listed in this specification is intended to include all higher numerical limits contained therein. Accordingly, the applicant reserves the right to amend this specification including the claims to explicitly list any subranges contained in the range explicitly listed herein.

[0049] Referring to two compared elements, features, etc. as "the same" may mean that they are identical or substantially identical. Thus, the phrases "the same" or "substantially the same" may include situations with what is considered in the art to be low deviations (e.g., 5% or less). Additionally, when a parameter is referred to as being consistent in a given region, it may mean that it is consistent in terms of average value.

[0050] Throughout the specification, unless otherwise stated, each element may be in the singular or in the plural.

[0051] When any element is referred to as being arranged (or located or positioned) "on (or under)" or "on (or under)" a component, it may mean that the element is placed in contact with the upper surface (or lower surface) of the component, and may also mean that another component may be interposed between the component and any element arranged (or located or positioned) on (or under) the component.

[0052] In addition, it should be understood that when an element is referred to as being “coupled,” “linked,” or “connected” to another element, the elements may be directly “coupled,” “linked,” or “connected” to each other, or one or more intervening elements may be present therebetween, through which the element may be “coupled,” “linked,” or “connected” to the other element. In addition, when a part is referred to as being “electrically coupled” to another part, the part may be directly electrically connected to the other part, or one or more intervening parts may be present therebetween, such that the part and the other part are indirectly electrically connected to each other.

[0053] Throughout this specification, unless otherwise stated, when "A and / or B" is stated, it means A, B, or A and B. That is, "and / or" includes any or all combinations of the listed items. Unless otherwise stated, when "C to D" is stated, it means C or more and D or less.

[0054] The terms used in this specification are used to describe the embodiments of the present disclosure and are not intended to limit the present disclosure.

[0055] In this document, when describing the present disclosure with reference to multiple embodiments, repeated descriptions of components that are identical, equivalent, or corresponding to each other in the multiple embodiments may be omitted. For example, when a component that is identical, equivalent, or corresponding to a component disclosed in one embodiment is disclosed in another embodiment, the corresponding component may be omitted from the description of the other embodiment, and the description may focus on the components that are different from those in the one embodiment.

[0056] Figure 1 is an exploded perspective view schematically illustrating a configuration of a battery pack according to an embodiment of the present disclosure; and

[0057] Figure 2 This is a schematic illustration Figure 1 A cross-sectional view of the configuration of a battery pack.

[0058] refer to Figure 1 and Figure 2 , the battery pack according to the present embodiment includes a housing 100 , a battery cell 200 , a first bracket 300 , a first connection member 400 , and a guide member or guide 500 .

[0059] The outer case 100 forms a schematic exterior of the battery pack and provides a space in which the battery cells 200 may be accommodated.

[0060] The housing 100 may include a housing body 110 and a cover 120 .

[0061] The housing body 110 may be formed to have a substantially box shape with an empty interior and one side open. The open side of the housing body 110 may be arranged to face upward. However, the cross-sectional shape of the housing body 110 is not limited to the following. Figure 1 The quadrilateral is shown, and may be varied in design to have any of various suitable shapes, such as any of a polygonal shape, a circular shape, and an elliptical shape.

[0062] The cover 120 may be coupled to the housing body 110 and may close the interior space of the housing body 110. As an example, the cover 120 may be formed to have a substantially plate shape and may be disposed to face the open side of the housing body 110 (i.e., the upper side of the housing body 110). The cover 120 may be fixed to the housing body 110 by any of various types of coupling methods, such as any of bolting, welding, and fitting coupling. In one embodiment, the thickness of the cover 120 may be formed to be equal to the thickness of the housing body 110.

[0063] The battery cell 200 may be a unit structure that stores and supplies power in a battery pack.

[0064] Herein, the case where the battery cell 200 is a lithium ion secondary battery and has a cylindrical shape will be described as an example. However, the present disclosure is not limited thereto, and for example, the battery cell 200 may be a lithium polymer battery or a prismatic battery.

[0065] Figure 3 is a perspective view schematically illustrating a configuration of a battery cell according to an embodiment of the present disclosure; and Figure 4 This is a schematic illustration Figure 3 A cross-sectional view of the configuration of a battery cell;

[0066] refer to Figure 3 and Figure 4 , the battery cell 200 may include a cell case 210 , an electrode assembly 220 , and a cap assembly 230 .

[0067] The single body housing 210 may include a bottom 211 having a generally circular shape and a sidewall portion 212 extending upward from the bottom 211. In one embodiment, the single body housing 210 may be made of steel, steel alloy, nickel-plated steel, nickel-plated steel alloy, aluminum, or aluminum alloy.

[0068] During the assembly process of the battery cell 200, the upper portion of the cell case 210 may be open. Therefore, in one embodiment, during the assembly process of the battery cell 200, the electrode assembly 220 may be integrated into one structure and inserted into the cell case 210. Thereafter, an electrolyte may be additionally injected into the cell case 210.

[0069] A crimping portion 213 that is recessed toward the central axis of the cap assembly 230 may be formed on the upper side of the unit housing 210 to prevent or substantially prevent the cap assembly 230 from being separated from the outside. The crimping portion 213 may be provided at a lower portion of the cap assembly 230. A crimping portion 214 that is bent around (e.g., wraps around) the edge of the cap assembly 230 may be formed on an upper portion of the crimping portion 213.

[0070] The electrode assembly 220 may be housed inside the cell housing 210. The electrode assembly 220 may include or be referred to as an electrode, an electrode group, or an electrode core. The electrode assembly 220 may include a negative electrode plate 221 coated with a negative electrode active material (e.g., graphite, carbon, etc.), a positive electrode plate 222 coated with a positive electrode active material (e.g., a transition metal oxide (e.g., LiCoO2, LiNiO2, LiMn2O4, etc.)), and a separator 223 located between the negative electrode plate 221 and the positive electrode plate 222 to prevent or substantially prevent short circuits and only allow lithium ions to move. In one embodiment, the negative electrode plate 221, the positive electrode plate 222, and the separator 223 may be wound into a generally cylindrical shape. In some examples, the negative electrode plate 221 may be copper (Cu) foil, the positive electrode plate 222 may be aluminum (Al) foil, and the separator 223 may be polyethylene (PE) or polypropylene (PP).

[0071] In one embodiment, the negative electrode tab 224 can be welded to the negative electrode plate 221. The negative electrode tab 224 can protrude downward from the electrode assembly 220 and extend a certain length (e.g., a certain length). In one embodiment, the positive electrode tab 225 can be welded to the positive electrode plate 222. The positive electrode tab 225 can protrude upward from the electrode assembly 220 and extend a certain length (e.g., a certain length). In one embodiment, the negative electrode tab 224 can be made of copper (Cu) or nickel (Ni), and the positive electrode tab 225 can be made of aluminum (Al).

[0072] In one embodiment, the negative electrode tab 224 may be welded to the bottom 211 of the cell case 210. Thus, the cell case 210 may function as a negative electrode. In some examples, the negative electrode tab 224 may be ultrasonically or laser welded to the bottom 211 of the cell case 210. However, in one embodiment, the positive electrode tab 225 may be welded to the bottom 211 of the cell case 210. In this case, the cell case 210 may function as a positive electrode.

[0073] The electrode assembly 220 may further include a center pin 240. In one embodiment, the center pin 240 may have a hollow cylindrical shape and may be coupled to the center or substantially the center of the electrode assembly 220. In one embodiment, the center pin 240 may be made of steel, stainless steel, aluminum, an aluminum alloy, or polybutylene terephthalate, but its material is not limited thereto. The center pin 240 may suppress deformation of the electrode assembly 220 during charging and discharging of the battery cell 200. The center pin 240 may serve as a channel through which gas generated inside the secondary battery moves. However, in some cases, the center pin 240 may be omitted.

[0074] Cap assembly 230 can seal the opening of cell housing 210 to protect electrode assembly 220 from the external environment. If the internal pressure of cell housing 210 rises above a reference pressure due to thermal runaway or combustion of battery cell 200, cap assembly 230 can rupture to release the internal gas of cell housing 210 to the outside. In some examples, cap assembly 230 can serve as a positive electrode terminal.

[0075] The cover assembly 230 may include an upper cover 231 , an exhaust plate 232 , and a lower cover 233 .

[0076] The upper cover 231 may function as a terminal electrically connected to an external device. In some examples, the upper cover 231 may function as a positive electrode terminal.

[0077] A vent hole V may be formed in the upper cover 231. If abnormal internal pressure is generated inside the cell case 210, such as due to overcharging, the vent hole V may discharge internal gas to the outside. In one embodiment, the upper cover 231 may be made of aluminum or an aluminum alloy.

[0078] As an example, the upper cover 231 may include an inner body 231 a , an outer body 231 b , and a bridge portion 231 c .

[0079] The inner body 231a may form an outer portion of the central portion of the upper cover 231. As an example, the inner body 231a may be formed to have a substantially disk shape. The inner body 231a may be disposed so that its central axis is aligned with the central axis C of the single body case 210.

[0080] The outer body 231b may form the outer portion of the edge of the upper cover 231. As an example, the outer body 231b may be formed to have a generally hollow ring shape. The diameter of the outer body 231b may be greater than the diameter of the inner body 231a. In one embodiment, the outer body 231b may be coaxially arranged with the inner body 231a. In other words, the central axis of the outer body 231b may be arranged to align with the central axis of the inner body 231a and the central axis C of the monomer housing 210.

[0081] The inner body 231a and the outer body 231b may be disposed vertically spaced apart from each other. As an example, the outer body 231b may be disposed below the inner body 231a. However, the inner body 231a and the outer body 231b may be disposed on the same plane.

[0082] The bridging portion 231c is disposed between the inner body 231a and the outer body 231b and can support the inner body 231a relative to the outer body 231b. In one embodiment, the bridging portion 231c can be formed into a rod shape having two end portions or opposite end portions connected to the outer circumferential surface of the inner body 231a and the inner circumferential surface of the outer body 231b, respectively. A plurality of bridging portions 231c can be provided. The plurality of bridging portions 231c can be arranged to be spaced apart from each other at a spacing (e.g., a set spacing) along the periphery of the central axis C surrounding the monomer housing 210. In one embodiment, the spacing between adjacent bridging portions 231c can be the same.

[0083] The exhaust hole V may be formed in the shape of a hole formed through the upper cover 231. As an example, the exhaust hole V may be formed in the shape of a hole passing through the area between the inner body 231a and the outer body 231b. A plurality of exhaust holes V may be provided. Each of the plurality of exhaust holes V may be individually provided between adjacent bridge portions 231c. However, the number of exhaust holes V is not limited to Figure 3 Quantities shown and may vary in design.

[0084] The exhaust plate 232 may be located below the upper cover 231. The exhaust plate 232 may be in close contact, contact, coupled, or connected to the lower portion of the upper cover 231. As an example, the exhaust plate 232 may be in close contact, contact, coupled, or connected to an edge of the upper cover 231 (such as the outer body 231b, rather than the upwardly protruding central portion of the upper cover 231 (such as the inner body 231a)). In one embodiment, the end portion of the exhaust plate 232 may extend in a curved manner around the end portion of the outer body 231b (e.g., around the end portion of the outer body 231b). In one embodiment, the exhaust plate 232 may be made of aluminum or an aluminum alloy.

[0085] The exhaust plate 232 may include a recess 232 a . The recess 232 a may be formed to be recessed from the outer side surface of the exhaust plate 232 (eg, recessed to a certain depth).

[0086] When the internal pressure of the battery cell 200 increases to above the reference pressure (or the rupture pressure of the vent plate 232) due to thermal runaway or combustion of the battery cell 200, the notch 232a may rupture, and the emissions generated inside the cell case 210 may sequentially pass through the notch 232a and the vent hole V to be discharged to the outside. Here, the emissions discharged from the vent hole V may include at least one of flame, gas, and smoke.

[0087] The lower cover 233 may be disposed below the exhaust plate 232. The lower cover 233 may be in close contact, in contact with, connected to, or coupled to the exhaust plate 232. The lower cover 233 may be electrically connected to the electrode assembly 220 via the positive electrode tab 225. The lower cover 233 may be electrically connected to the exhaust plate 232 and the upper cover 231. In one embodiment, the positive electrode tab 225 of the electrode assembly 220 may be welded to the lower surface of the lower cover 233. In some examples, the lower surface of the lower cover 233 may be ultrasonically and / or laser welded to the positive electrode tab 225. In some examples, the lower cover 233 may be made of aluminum or an aluminum alloy.

[0088] In some examples, if thermal runaway or combustion of the battery cell 200 occurs, the exhaust plate 232 may be deformed by the internal pressure of the cell case 210 , and the lower cover 233 and the exhaust plate 232 may be electrically separated from each other.

[0089] The first insulating member 234 may be installed between the exhaust plate 232 and the lower cover 233. The first insulating member 234 may be located between the edge of the exhaust plate 232 and the edge of the lower cover 233. If the exhaust plate 232 is deformed due to internal gas, the first insulating member 234 may insulate between the lower cover 233 and the exhaust plate 232. In some examples, the first insulating member 234 may be formed of a resin material such as polyethylene (PE), polypropylene (PP), or polyethylene terephthalate (PET), but the material is not limited thereto.

[0090] The second insulating member 235 may be mounted on the upper side of the monomer housing 210. The second insulating member 235 may be located between the end portion of the outer body 231b of the exhaust plate 232 that surrounds (e.g., surrounds) the upper cover 231 and the monomer housing 210. Both sides or opposite sides of the second insulating member 235 may be in close contact with the end portion of the exhaust plate 232 and the inner side surface of each of the crimping portion 214 and the crimping portion 213, respectively. The second insulating member 235 may be insulated between the monomer housing 210 and the cover assembly 230. The second insulating member 235 may be formed of a resin material such as polyethylene (PE), polypropylene (PP), or polyethylene terephthalate (PET), but its material is not limited thereto.

[0091] The battery cell 200 may be disposed inside the housing 100. As an example, the battery cell 200 may be disposed in the interior space of the housing body 110. The battery cell 200 may be disposed such that the bottom 211 faces the bottom surface of the housing body 110 and the vent hole V faces the cover 120. However, the battery cell 200 is not limited thereto and may be disposed such that the bottom 211 faces the cover 120 and the vent hole V faces the bottom surface of the housing body 110.

[0092] A plurality of battery cells 200 may be provided. The plurality of battery cells 200 may be arranged in parallel with each other in the housing 100. The plurality of battery cells 200 may be arranged inside the housing 100 in any of a variety of patterns, such as a grid shape or a zigzag shape. The number of battery cells 200 may vary in design depending on the size of the housing 100, etc.

[0093] The first bracket 300 may be disposed inside the housing 100 and may support one side of each of the plurality of battery cells 200. The first bracket 300 may maintain a spacing (eg, a constant spacing) between the plurality of battery cells 200.

[0094] The first bracket 300 may include a first bracket body 310 , a first insertion hole 320 , and a transmission hole 330 .

[0095] The first bracket body 310 may be formed to have a substantially plate shape. As an example, the first bracket body 310 may be located on an upper side surface of each battery cell 200 where the vent hole V is formed.

[0096] The first insertion hole 320 may provide a space in the first bracket body 310 into which one side of the battery cell 200 is inserted. As an example, the first insertion hole 320 may be formed to be recessed upward from the lower surface of the first bracket body 310. The cross-sectional area of ​​the first insertion hole 320 may be larger than the cross-sectional area of ​​the battery cell 200. The upper end portion of the battery cell 200, where the cap assembly 230 is formed, may be inserted into the first insertion hole 320.

[0097] A plurality of first insertion holes 320 may be provided. The plurality of first insertion holes 320 may be provided spaced apart from each other in the first holder body 310. In one embodiment, upper end portions of the plurality of battery cells 200 may be respectively inserted into different first insertion holes 320.

[0098] The transfer hole 330 can transfer the exhaust discharged from the exhaust hole V of the battery cell 200 to the internal space of the housing 100. The transfer hole 330 can be formed to be recessed downward from the upper side surface of the first bracket body 310. The lower side surface of the transfer hole 330 can be connected to the upper side surface of the first insertion hole 320. Accordingly, the first insertion hole 320 and the transfer hole 330 can be formed to continuously pass through the first bracket body 310 in the vertical direction.

[0099] The transfer hole 330 may be provided to face the exhaust hole V of the battery cell 200 inserted into the first insertion hole 320 . Accordingly, exhaust discharged from the exhaust hole V may be transferred to the inner space of the housing 100 through the transfer hole 330 .

[0100] The cross-sectional area of ​​the transmission hole 330 may be smaller than the cross-sectional area of ​​the first insertion hole 320. Accordingly, the upper end portion of the battery cell 200 inserted into the first insertion hole 320 may not protrude upward from the first bracket body 310 through the transmission hole 330. In one embodiment, the diameter of the transmission hole 330 may be, for example, 13 mm.

[0101] A plurality of transmission holes 330 may be provided. Each of the plurality of transmission holes 330 may be provided at a position facing the first insertion hole 320 and the exhaust hole V, respectively.

[0102] The first bracket body 310 may include a first partition 311 and a second partition 312 .

[0103] The first spacer 311 forms an outer portion of one side of the first bracket body 310 and may be provided around (e.g., surround) the first insertion hole 320. That is, the first spacer 311 may refer to a lower area of ​​the first bracket body 310 that surrounds (e.g., surrounds) the first insertion hole 320 among the entire area of ​​the first bracket body 310. The first spacer 311 may be inserted into the space between adjacent battery cells 200. Accordingly, the first spacer 311 may ensure that the spacing between adjacent battery cells 200 remains at a constant size.

[0104] The second partition 312 may form an outer portion of the other side of the first bracket body 310 and may be provided around (e.g., surround) the transfer hole 330. That is, the second partition 312 may refer to an upper side area of ​​the first bracket body 310 that surrounds (e.g., surrounds) the transfer hole 330 among the entire area of ​​the first bracket body 310.

[0105] The second separator 312 may protrude outward from the battery cell 200. That is, the second separator 312 may be disposed at a position higher than the position of the exhaust hole V. Since the cross-sectional area of ​​the transfer hole 330 is smaller than the cross-sectional area of ​​the first insertion hole 320, the second separator 312 may be located on the upper side surface of the battery cell 200. The second separator 312 may serve as a blocking wall that blocks the path through which the exhaust hole V of one battery cell 200 flows into the exhaust hole V of an adjacent battery cell 200. Accordingly, the second separator 312 can prevent or substantially prevent chain combustion of the battery cell 200.

[0106] The first connection member 400 may be disposed to face the first bracket 300 and may be electrically connected to the battery cell 200. The first connection member 400 may connect the plurality of battery cells 200 disposed inside the housing 100 to each other in series or in parallel.

[0107] Figure 5 is a perspective view schematically illustrating the configuration of a first connecting member and a guide member according to an embodiment of the present disclosure; Figure 6 is a plan view schematically illustrating the configuration of a first connecting member and a guide member according to an embodiment of the present disclosure; Figure 7 is a front sectional view schematically illustrating the configuration of a first connecting member and a guide member according to an embodiment of the present disclosure; and Figure 8 is a side sectional view schematically illustrating the configuration of a first connecting member and a guide member according to an embodiment of the present disclosure.

[0108] refer to Figures 1 to 8 , the first connection member 400 may include a tab body 410 and a connection tab 420 .

[0109] The tab body 410 may be located on the first bracket body 310 and may support the connection tab 420. The tab body 410 may be formed to have a generally plate shape and may be located on the upper surface of the first bracket body 310. The tab body 410 may be fixed to the upper surface of the first bracket body 310 by any of various types of coupling methods, such as welding, bonding, bolting, or fitting. The tab body 410 may have a shape that does not directly face the transmission hole 330 formed through the first bracket body 310.

[0110] Tab body 410 may be formed of a conductive material such as copper, nickel, aluminum, etc. Tab body 410 may be electrically connected to the external terminals of the battery pack. Tab body 410 may collect power received from connection tab 420, which will be described below, and transmit the power to the external terminals of the battery pack, or distribute power received from the external terminals of the battery pack to connection tab 420.

[0111] The tab body 410 may be formed in multiple pieces or in a single piece. In the case where a plurality of tab bodies 410 are formed, the plurality of tab bodies 410 may be electrically connected to each other.

[0112] The connection tab 420 extends from the tab body 410 and can be connected to the upper cover 231 of the battery cell 200. A plurality of connection tabs 420 may be provided. The plurality of connection tabs 420 may extend from the tab body 410 toward different battery cells 200 and may each be connected to the upper cover 231 of a different battery cell 200. In one embodiment, the upper cover 231 serves as a positive electrode terminal, and the first connection member 400 may serve as a component for electrically connecting the positive electrodes of the battery cells 200 to each other.

[0113] The connection tab 420 may include a first extension portion 421 , a second extension portion 422 , and a third extension portion 423 .

[0114] In one embodiment, the first extension portion 421 can extend from the tab body 410 and fully support the second extension portion 422 and the third extension portion 423, which will be described below. The first extension portion 421 can face the transmission hole 330. In one embodiment, the end portion of the first extension portion 421 can be arranged to vertically face the transmission hole 330. The longitudinal direction of the first extension portion 421 can be arranged to be parallel to the tab body 410.

[0115] The second extension portion 422 may extend from the first extension portion 421 toward the delivery hole 330. As an example, the second extension portion 422 may extend downward from an end portion of the first extension portion 421 and may be inserted into the delivery hole 330. The longitudinal direction of the second extension portion 422 may be provided to intersect with the longitudinal direction of the first extension portion 421. As an example, the longitudinal direction of the second extension portion 422 may be provided to be perpendicular to the first extension portion 421.

[0116] The third extension portion 423 may extend from the second extension portion 422 and may contact the upper cover 231. As an example, the third extension portion 423 may extend from an end portion of the second extension portion 422 in a direction parallel to the longitudinal direction of the first extension portion 421. The lower surface of the third extension portion 423 may contact the upper surface of the inner body 231a of the upper cover 231. The third extension portion 423 may be fixed to the inner body 231a by any of various coupling methods, such as any of welding, fitting coupling, and bolting.

[0117] The first extension portion 421 , the second extension portion 422 , and the third extension portion 423 may have a structure that minimizes or reduces an area facing the exhaust hole V to allow exhaust to be discharged from the exhaust hole V smoothly or easily.

[0118] As an example, the distance L1 between the first bracket body 310 and the second extension 422 may be greater than the distance L2 between the first bracket body 310 and the inner body 231a. Here, the distance L1 between the first bracket body 310 and the second extension 422 may refer to the distance between the first partition 311 and the inner surface of the second extension 422, and the distance L2 between the first bracket body 310 and the inner body 231a may refer to the distance between the first partition 311 and the outer peripheral surface of the inner body 231a. Accordingly, the lower end portion of the second extension 422 may be positioned so as not to directly face the exhaust hole V, thereby preventing or substantially preventing interference with the discharge of exhaust from the exhaust hole V.

[0119] In one embodiment, the length L of the second extension portion 422 is a It can be greater than or equal to 1 mm and less than or equal to 3 mm. a If the length L of the second extension portion 422 is less than 1 mm, the installation space for the guide member 500 to be described below may become too narrow. a If it is greater than 3 mm, the thickness of the first support body 310 or the tab body 410 may be excessively increased, thereby reducing the overall energy density.

[0120] The width W1 of the third extension portion 423 may be smaller than the diameter W2 of the inner body 231a. The end portion of the third extension portion 423 may be disposed on the inner body 231a. Therefore, the third extension portion 423 does not protrude outward from the inner body 231a and may not directly face the exhaust hole V disposed outside the inner body 231a.

[0121] The guide member 500 is provided in the first connection member 400 and may guide the flow of the exhaust discharged from the exhaust hole V. In other words, the guide member 500 may provide a path through which the exhaust discharged from the exhaust hole V is smoothly or easily discharged to the outside of the transfer hole 330 without interfering with the first connection member 400.

[0122] The guide member 500 may include a cavity 510 and a slit 520 .

[0123] The chamber 510 may be provided between the first bracket body 310 and the connection tab 420. For example, the chamber 510 may refer to a space surrounded by the second partition 312, the first extension 421, and the second extension 422 within the inner space of the first bracket body 310 facing the exhaust hole V. The lower surface of the chamber 510 faces the exhaust hole V and may be connected to the exhaust hole V. Accordingly, exhaust discharged from the exhaust hole V can flow into the interior of the chamber 510 without being blocked by the connection tab 420.

[0124] The two or opposite sides of the chamber 510 that are spaced apart from each other in the width direction of the connection tab 420 may be formed to be open. The chamber 510 may be connected to the transfer hole 330 through the open sides. Accordingly, the discharge flowing into the chamber 510 may be transferred to the transfer hole 330 through the two or opposite sides of the chamber 510.

[0125] A slit 520 may be formed through the connection tab 420. The slit 520 may provide a path in the connection tab 420 through which the exhaust flowing into the chamber 510 is transferred to the transfer hole 330. Accordingly, the exhaust flowing into the chamber 510 can be smoothly or easily transferred to the transfer hole 330 through the slit 520 and both sides or opposite sides of the chamber 510.

[0126] Slit 520 may be disposed such that its longitudinal direction is parallel to the longitudinal direction of connection tab 420. Here, the longitudinal direction of connection tab 420 may not refer to any one direction, but may refer to a direction parallel to a direction extending continuously from first extension portion 421 toward second extension portion 422 and third extension portion 423. That is, slit 520 has different sections that pass through first extension portion 421, second extension portion 422, and third extension portion 423, respectively, and each section of slit 520 may be disposed parallel to the extending directions of first extension portion 421, second extension portion 422, and third extension portion 423, respectively.

[0127] As an example, the slot 520 may include a first slot 521 , a second slot 522 , and a third slot 523 .

[0128] The first slit 521 may have the shape of a hole passing through the first extension 421. The first end portion of the first slit 521 may be located at the boundary region between the first extension 421 and the second extension 422. The second end portion of the first slit 521 may extend from the first end portion of the first slit 521 in the direction in which the first extension 421 extends. Here, the direction in which the first extension 421 extends may be parallel to the radial direction of the inner body 231a. The second end portion of the first slit 521 may be positioned to face the upper surface of the outer body 231b. Accordingly, the length of the first slit 521 parallel to the direction in which the first extension 421 extends may be greater than the length of the exhaust hole V parallel to the direction in which the first extension 421 extends. The first slit 521 may be positioned to directly face the exhaust hole V in the vertical direction, or may be positioned offset from the exhaust hole V.

[0129] The second slit 522 may have a shape of a hole passing through the second extension 422. A first end portion of the second slit 522 is located at a boundary region between the first extension 421 and the second extension 422 and may be connected to the first slit 521. A second end portion of the second slit 522 may extend from the first end portion of the second slit 522 in an extending direction of the second extension 422. The second end portion of the second slit 522 may be located at a boundary region between the second extension 422 and the third extension 423.

[0130] The third slit 523 may have a shape of a hole passing through the third extension portion 423. A first end portion of the third slit 523 is located at a boundary area between the second extension portion 422 and the third extension portion 423 and may be connected to the second slit 522. A second end portion of the third slit 523 may extend from the first end portion of the third slit 523 in the extending direction of the third extension portion 423. The second end portion of the third slit 523 may pass through an end portion of the third extension portion 423. Accordingly, the third extension portion 423 may have a shape divided into two sides based on the third slit 523.

[0131] In one embodiment, the width W of the slot 520 is s It can be greater than or equal to 0.8 mm and less than or equal to 1.2 mm. s If the width W of the slit 520 is less than 0.8 mm, the discharge flowing into the chamber 510 may not pass smoothly or easily through the slit 520. s If the width of the connecting tab 420 is greater than 1.2 mm, the width of the connecting tab 420 may be excessively reduced, and power may not be smoothly or easily transmitted between the tab body 410 and the battery cell 200. In one embodiment, the first slit 521, the second slit 522, and the third slit 523 may all be formed to have the same width. As an example, the width of each of the first slit 521, the second slit 522, and the third slit 523 may be formed to be the same as the width W of the slit 520. s same.

[0132] The battery pack according to the present embodiment may further include a second bracket 600 and a second connection member 700 .

[0133] The second bracket 600 may be spaced apart from the first bracket 300 and may support the other side of each of the plurality of battery cells 200. The second bracket 600, together with the first bracket 300, may maintain a spacing (eg, a constant spacing) between the plurality of battery cells 200.

[0134] The second bracket 600 may include a second bracket body 610 and a second insertion hole 620 .

[0135] The second bracket body 610 may be formed to have a substantially plate shape. The second bracket body 610 may be disposed between the bottom surface of the housing body 110 and the bottom 211 of the battery cell 200. The upper surface and lower surface of the second bracket body 610 may be located on the bottom 211 of the battery cell 200 and the bottom surface of the housing body 110, respectively.

[0136] The second insertion hole 620 can provide a space in the second bracket body 610 into which the other side of the battery cell 200 is inserted. As an example, the second insertion hole 620 can be formed to be recessed downward from the upper surface of the second bracket body 610. The cross-sectional area of ​​the second insertion hole 620 can be larger than the cross-sectional area of ​​the battery cell 200. The lower end portion of the battery cell 200 can be inserted into the second insertion hole 620.

[0137] A plurality of second insertion holes 620 may be provided. The plurality of second insertion holes 620 may be provided to be spaced apart from each other in the second holder body 610. In one embodiment, lower end portions of the plurality of battery cells 200 may each be inserted into a corresponding second insertion hole 620.

[0138] The second connection member 700 may be disposed to face the second bracket 600 and may be electrically connected to the battery cell 200. The second connection member 700 may connect the plurality of battery cells 200 disposed inside the housing 100 to each other in series or in parallel.

[0139] As an example, the second connection member 700 may be located on the lower surface of the second bracket body 610. The second connection member 700 may be fixed to the lower surface of the second bracket body 610 by any of various types of coupling methods, such as welding, bonding, bolting, or fitting. The second connection member 700 may be formed of a conductive material, such as copper, nickel, aluminum, etc.

[0140] One side of the second connection member 700 may be electrically connected to the bottom 211 of each of the plurality of cell cases 210. In one embodiment, the cell cases 210 serve as negative electrode terminals, and the second connection member 700 may serve as a component for electrically connecting the negative electrodes of the battery cells 200. The other side of the second connection member 700 may be electrically connected to an external terminal of the battery pack.

[0141] Herein, the operation of the battery pack according to the present embodiment will be described.

[0142] Figure 9 and Figure 10 is a view schematically illustrating an operation process of a battery pack according to an embodiment of the present disclosure.

[0143] refer to Figure 9 and Figure 10 If thermal runaway or combustion of the battery cell 200 occurs, emissions (such as flame, gas, smoke, etc.) generated inside the battery cell 200 may be discharged to the outside of the battery cell 200 through the exhaust hole V.

[0144] Emissions discharged from the exhaust holes V that do not directly face the connection tab 420 among the plurality of exhaust holes V are directly transferred to the transfer hole 330 and discharged to the outside of the first bracket 300 through the transfer hole 330 .

[0145] Emissions exhausted from the exhaust holes V facing the connection tab 420 among the plurality of exhaust holes V flow into the chamber 510 through the exhaust holes V.

[0146] The discharge flowing into the chamber 510 may be smoothly or easily transferred to the transfer hole 330 through the narrow mouth 520 and the opened two or opposite sides of the chamber 510 , and discharged to the outside of the first bracket 300 through the transfer hole 330 .

[0147] In this process, because the second separator 312 is disposed at a position higher than the vent hole V, exhaust discharged from the vent hole V of any one battery cell 200 can be discharged to the outside of the first bracket 300 without flowing into the vent hole V of an adjacent battery cell 200 .

[0148] Herein, a battery pack according to another embodiment of the present disclosure will be described.

[0149] Figure 11 is a view schematically illustrating a configuration of a battery pack according to another embodiment of the present disclosure.

[0150] refer to Figure 11 The battery pack according to this embodiment can be configured to Figure 1 The battery pack of the embodiment further includes a protection member 800.

[0151] The protective member 800 may be disposed between the first bracket 300 and the second bracket 600. The protective member 800 may be disposed around (e.g., surround) the battery cells 200, and more specifically, around (e.g., surround) the sidewall portions 212 of the battery cells 200. That is, if the battery cells 200 burn, the protective member 800 may block emissions from being transmitted between the sidewall portions 212 of adjacent battery cells 200. Accordingly, the protective member 800 may prevent or substantially prevent chain combustion of the battery cells 200 due to damage or penetration of the sidewall portions 212 of the battery cells 200.

[0152] In one embodiment, a plurality of protective members 800 may be provided. Each of the plurality of protective members 800 may be disposed between pairs of adjacent battery cells 200.

[0153] In one embodiment, the protective member 800 may include a first protective member 810 and a second protective member 820 .

[0154] The first protective member 810 may extend from the first bracket 300 toward the second bracket 600. For example, the first protective member 810 may have a partition shape extending from the lower end portion of the first bracket body 310 (i.e., the lower end portion of the first partition 311) toward the upper end portion of the second bracket body 610. In one embodiment, the first protective member 810 may be integrally formed with the first bracket body 310, or may be manufactured as a separate component from the first bracket body 310 and then inserted between the first bracket 300 and the second bracket 600.

[0155] The second protective member 820 may extend from the second bracket 600 toward the first bracket 300. For example, the second protective member 820 may have a spacer shape extending from the upper end portion of the second bracket body 610 toward the lower end portion of the first bracket body 310. The upper end portion of the second protective member 820 may contact the lower end portion of the first protective member 810. Accordingly, the first and second protective members 810, 820 can seal the space between the sidewall portions 212 of adjacent battery cells 200.

[0156] In one embodiment, the second protection member 820 may be integrally formed with the second bracket body 610 , or may be manufactured as a component separate from the second bracket body 610 and then inserted between the first bracket 300 and the second bracket 600 .

[0157] In one embodiment, the first protective member 810 and the second protective member 820 may include insulating and heat-resistant synthetic resin, ceramic material, or the like.

[0158] Herein, the operation of the battery pack according to the present embodiment will be described.

[0159] Figure 12 This is a schematic illustration Figure 11 A view of the operating status of the battery pack.

[0160] refer to Figure 12 , if the battery cell 200 burns, the internal pressure of the cell case 210 may excessively increase, or the cell case 210 may be damaged by external impact.

[0161] For example, when the sidewall portion of the cell housing 210 is torn or a through hole is formed in the cell housing 210 , emissions (such as flame, gas, smoke, etc.) are discharged to the outside of the battery cell 200 through the sidewall portion 212 of the battery cell 200 rather than through the exhaust hole V.

[0162] In this case, the exhaust discharged from the sidewall portion 212 of any one battery cell 200 may flow toward the adjacent battery cell 200 .

[0163] However, since the first and second protective members 810 and 820 are disposed between adjacent battery cells 200 , the flow of exhaust discharged from the sidewall portion 212 of any one battery cell 200 may be blocked by the first and second protective members 810 and 820 and not transmitted to the adjacent battery cells 200 .

[0164] Accordingly, a temperature increase of the burning battery cell 200 and the adjacent battery cells 200 may be suppressed, and chain combustion of the battery cells 200 may be prevented or substantially prevented.

[0165] Herein, a battery pack according to another embodiment of the present disclosure will be described.

[0166] Figure 13 is a view schematically illustrating a configuration of a battery pack according to another embodiment of the present disclosure; and Figure 14 This is a schematic illustration Figure 13 A view of the operating status of the battery pack.

[0167] refer to Figure 13 and Figure 14 The battery pack according to this embodiment can be configured to Figure 1 or Figure 11 The battery pack of the embodiment further includes a blocking member 900 .

[0168] exist Figure 13 and Figure 14 In the embodiment, the case where the battery pack according to the present embodiment includes the protection member 800 is illustrated as an example, but the battery pack according to the present embodiment may also be configured not to include the protection member 800 .

[0169] The blocking member 900 may be disposed to face the battery cell 200 and cover the vent hole V. A plurality of blocking members 900 may be provided. In one embodiment, the plurality of blocking members 900 may be disposed to each cover the vent hole V of a corresponding battery cell 200 .

[0170] During normal operation of the battery cells 200 , the blocking member 900 may close the vent holes V. Accordingly, if one of the battery cells 200 burns, the blocking member 900 may block exhaust discharged from the battery cell 200 from flowing into the vent holes V of adjacent battery cells 200 .

[0171] The blocking member 900 may include an insulating, heat-resistant, or fire-resistant material. For example, the blocking member 900 may include at least one of silicone, polystyrene, polyurethane, polyethylene, vinyl chloride, ceramic materials, and the like.

[0172] In one embodiment, the barrier member 900 may be manufactured in the form of a sheet and then attached to the cap assembly 230 of the battery cell 200. In another embodiment, the barrier member 900 may be applied to the cap assembly 230 of the battery cell 200 in a liquid state and then cured.

[0173] If the battery cell 200 burns, the blocking member 900 may be separated from the vent hole V by the pressure of the exhaust discharged from the vent hole V, thereby opening the vent hole V. The area of ​​the blocking member 900 may be smaller than the cross-sectional area of ​​the transmission hole 330. Accordingly, if the battery cell 200 burns, the blocking member 900 can be easily separated to the outside of the transmission hole 330.

[0174] According to one or more embodiments of the present disclosure, the first connecting member has a structure having a minimal or reduced overlapping area with the exhaust hole, and a guide member is formed in the first connecting member so that if the battery cell burns, emissions generated from the battery cell can be discharged smoothly or easily.

[0175] According to one or more embodiments of the present disclosure, the height of the second separator is higher than that of the vent hole, so that emissions discharged from the battery cells cannot be transferred to adjacent battery cells, thereby preventing or substantially preventing chain combustion of the battery cells.

[0176] According to one or more embodiments of the present disclosure, a protective member surrounding (e.g., encircling) a side wall portion of a battery cell is installed between a first bracket and a second bracket, so that if the side wall portion of the battery cell is damaged, emissions can be transmitted between the first bracket and the second bracket, thereby preventing or substantially preventing chain combustion of multiple battery cells.

[0177] According to one or more embodiments of the present disclosure, the blocking member can prevent or substantially prevent emissions generated if a battery cell burns from flowing into the exhaust holes of the remaining battery cells.

[0178] However, aspects and effects obtainable through the present disclosure are not limited to the above aspects and effects, and those skilled in the art will clearly understand other technical aspects and effects not mentioned from the above description of the present disclosure.

[0179] Although the present disclosure has been described with reference to some embodiments shown in the drawings, these embodiments are merely illustrative, and it is understood that those skilled in the art can derive various modifications and other equivalent embodiments based on the embodiments.

Claims

1. A battery pack comprising: shell; a plurality of battery cells in the housing and each including a vent; a first bracket in the housing and configured to support a side of each of the plurality of battery cells; a first connecting member facing the first bracket and electrically connected to the plurality of battery cells; and A guide is in the first connection member and is configured to guide a flow of exhaust discharged from the exhaust hole.

2. The battery pack according to claim 1, wherein the first bracket comprises: a first bracket body; a plurality of first insertion holes passing through the first bracket body, and the plurality of battery cells are respectively inserted into the plurality of first insertion holes; and A transmission hole passes through the first bracket body, is connected to the first insertion hole, and faces the exhaust hole.

3. The battery pack according to claim 2, wherein the first bracket body comprises: a first partition member surrounding the first insertion hole; and a second partition extending from the first partition and arranged around the transfer hole, The second separator protrudes outward from a battery cell among the plurality of battery cells.

4. The battery pack according to claim 3, wherein each of the plurality of battery cells comprises: A single body shell, accommodating the electrode assembly; and an upper cover coupled to the single body housing, wherein the exhaust hole extends in the upper cover, and The first connecting member comprises: a terminal lug body, located on the first bracket body; and A connecting lug extends from the lug body and is connected to the upper cover.

5. The battery pack according to claim 4, wherein the connecting tab comprises: a first extension portion extending from the wiring piece body and facing the transmission hole; a second extending portion extending from the first extending portion and inserted into the transmission hole; and The third extending portion extends from the second extending portion and contacts the upper cover.

6. The battery pack according to claim 5, wherein the upper cover comprises: inner subject; an outer body arranged coaxially with the inner body; and a plurality of bridge portions between the inner body and the outer body and configured to support the inner body relative to the outer body, The exhaust holes are located between adjacent bridge portions among the plurality of bridge portions. 7 . The battery pack according to claim 6 , wherein a distance between the first bracket body and the second extension portion is greater than a distance between the first bracket body and the inner body. 8 . The battery pack according to claim 6 , wherein a length of the second extension portion is greater than or equal to 1 mm and less than or equal to 3 mm. 9 . The battery pack according to claim 6 , wherein a width of the third extension portion is smaller than a diameter of the inner body. 10 . The battery pack according to claim 9 , wherein an end portion of the third extension is on the inner body.

11. The battery pack according to claim 6, wherein the guide member comprises: a chamber between the first bracket body and the connecting tab; and A slot extends through the connection lug and is connected to the chamber and the transfer hole. 12 . The battery pack according to claim 11 , wherein opposite sides of the chamber are open and connected to the transfer hole. 13 . The battery pack according to claim 11 , wherein the slit extends such that a longitudinal direction of the slit is parallel to a longitudinal direction of the connection tab. 14 . The battery pack according to claim 11 , wherein a width of the slit is greater than or equal to 0.8 mm and less than or equal to 1.2 mm.

15. The battery pack of claim 11 , wherein the narrow opening comprises: a first slot passing through the first extension; a second slot connected to the first slot and extending through the second extension; and A third slot is connected to the second slot and passes through the third extension. 16 . The battery pack according to claim 15 , wherein one end portion of the first slit faces the outer body.

17. The battery pack according to any one of claims 1 to 16, further comprising: a second bracket spaced apart from the first bracket and configured to support the other side of each of the plurality of battery cells; and A protective member is disposed between the first bracket and the second bracket and around each of the plurality of battery cells.

18. The battery pack according to claim 17, wherein the protective member comprises: a first protective member extending from the first bracket toward the second bracket; and The second protective member extends from the second bracket toward the first bracket and contacts the first protective member. 19 . The battery pack according to claim 1 , further comprising a plurality of blocking members each facing a battery cell among the plurality of battery cells and configured to cover the vent hole. 20 . The battery pack according to claim 19 , wherein when the exhaust is discharged from the exhaust hole, a corresponding blocking member of the plurality of blocking members is separated from the exhaust hole.

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