Battery pack and vehicle including the same

Abstract

The present disclosure relates to a battery pack and a vehicle including the same, which are directed to providing a battery pack capable of improving energy efficiency compared to a battery pack of the same volume and weight. To this end, the present disclosure provides a battery pack comprising: a case; a plurality of battery cells each including a first surface and a second surface opposite to each other, and an exhaust port and a terminal formed on the first surface, and disposed within the case; a guide member disposed between the housing and the first surface and configured to guide a flow of emissions discharged from the exhaust port; and a buffer member disposed between the housing and the first surface and configured to absorb an impact applied to the terminal. According to one or more embodiments of the present disclosure, a volume ratio of battery cells may be increased and energy efficiency may be improved by integrating an exhaust path into a lower space of a battery pack, which is used for bollard performance evaluation by impact analysis.

Description

Technical Field

[0001] The present disclosure relates to a battery pack and a vehicle including the 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 small portable electronic devices such as smartphones, feature phones, laptops, digital cameras, and camcorders, and high-capacity secondary batteries are widely used as power sources and storage batteries for drive motors in hybrid vehicles or electric vehicles. Secondary batteries include an electrode assembly including a positive electrode and a negative electrode, a housing that accommodates the electrode assembly, an electrode terminal connected to the electrode assembly, and the like.

[0003] Secondary batteries can be used as battery packs formed by connecting multiple unit cells in series and / or in parallel to provide high energy density. A battery pack can be formed by interconnecting electrode terminals of multiple unit cells to meet the desired amount of power, for example, to achieve a high-power secondary battery for an electric vehicle.

[0004] The above information disclosed in the art forming the background art of the present disclosure is only intended to enhance understanding of the background art of the present disclosure and therefore may include information that does not constitute the relevant art. Summary of the invention

[0005] Aspects of embodiments of the present disclosure are directed to providing a battery pack capable of improving energy efficiency compared with a battery pack of the same volume and weight, and a vehicle including the battery pack.

[0006] These 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, a battery pack includes: a shell; a plurality of battery cells, each battery cell including a first surface and a second surface opposite to each other, and an exhaust port and a terminal formed on the first surface, and disposed within the shell; a guide member disposed between the shell and the first surface and configured to guide the flow of emissions discharged from the exhaust port; and a buffer member disposed between the shell and the first surface and configured to absorb impact applied to the terminal.

[0008] The case may include a case body, a first cover coupled to the case body and disposed to face the first surface, and a second cover coupled to the case body and disposed to face the second surface.

[0009] The housing may further include a cooling channel which is provided inside the second cover and through which the refrigerant flows.

[0010] The first surface may be disposed to face downward, and the first cover may be disposed below the housing body.

[0011] The guide member may include: a bus bar holder, which is arranged between the first cover and the first surface and includes a bus bar connected to the terminal; a ventilation bracket, which is arranged between the first cover and the bus bar holder; a plurality of transmission holes formed to pass through the bus bar holder and the ventilation bracket; a first chamber, which is arranged inside the ventilation bracket and connected to the transmission holes; and a second chamber, which is arranged outside the ventilation bracket and is configured to accommodate a buffer member.

[0012] The plurality of battery cells may be arranged along a first direction, and the first chamber and the second chamber may extend along the first direction.

[0013] The first chambers and the second chambers may be alternately arranged in a second direction crossing the first direction.

[0014] The vent bracket may include a bracket body disposed to surround the first chamber, a first extending portion extending from the bracket body and contacting the first cover, and a second extending portion extending from the first extending portion and contacting the housing body.

[0015] The guide member may further include a sealing member configured to seal the first chamber and the transfer hole.

[0016] The sealing member may include a first sealing member disposed between the first cover and the first extending portion, a second sealing member disposed between the bus bar holder and the bracket body, and a third sealing member disposed between the bus bar holder and the first surface.

[0017] The sealing member may further include a fourth sealing member disposed inside the second chamber.

[0018] The guide member may further include a fixing member connected to the vent bracket and configured to prevent movement of the vent bracket.

[0019] The fixing member may include a first fixing body passing through the second extension portion and inserted into the shell body, a second fixing body disposed inside the shell body and coupled to the first fixing body, and a pressing flange extending from the first fixing body and configured to press the second extension portion toward the shell body.

[0020] The guide member may further include a plurality of reinforcement members configured to enhance the rigidity of the ventilation bracket.

[0021] The plurality of battery cells may be arranged along a first direction, and the transfer holes and the reinforcement members may be alternately disposed along the first direction.

[0022] The reinforcement member may protrude from the bracket body, and the reinforcement member may be disposed such that a longitudinal direction thereof is parallel to a second direction crossing the first direction.

[0023] The terminals may be provided in a pair, and the buffer member may include a first pad provided on one side of the vent bracket and facing one terminal of the pair of terminals, and a second pad provided on the other side of the vent bracket and facing the other terminal of the pair of terminals.

[0024] The first pad and the second pad may be provided to be elastically deformable.

[0025] According to one or more embodiments, a vehicle includes a vehicle body and a battery pack coupled to the vehicle body, wherein the battery pack includes: a shell; a plurality of battery cells, each battery cell including a first surface and a second surface opposite to each other, and an exhaust port and a terminal formed on the first surface, and disposed within the shell; a guide member disposed between the shell and the first surface and configured to guide the flow of emissions discharged from the exhaust port; and a buffer member disposed between the shell and the first surface and configured to absorb impact applied to the terminal.

[0026] The battery pack may be disposed under the vehicle body, and the first surface may be disposed to face downward.

[0027] According to one or more embodiments of the present disclosure, by integrating an exhaust path into a lower space of a battery pack, which is used for bollard performance evaluation through impact analysis, a volume ratio of a battery cell may be increased and energy efficiency may be improved.

[0028] However, the effects obtainable by the present disclosure are not limited to the above-mentioned effects, and other technical effects not mentioned will be clearly understood by those skilled in the art from the following description of the present disclosure. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] 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 interpreted as being limited to the accompanying drawings:

[0030] Figure 1 is a perspective view schematically showing a configuration of a battery pack according to one embodiment of the present disclosure;

[0031] Figure 2 is a bottom perspective view schematically showing a configuration of a battery pack according to one embodiment of the present disclosure;

[0032] Figure 3 is an exploded perspective view schematically showing a configuration of a battery pack according to one embodiment of the present disclosure;

[0033] Figure 4is a cross-sectional view schematically showing a configuration of a battery pack according to one embodiment of the present disclosure;

[0034] Figure 5 is a perspective view schematically showing a configuration of a battery cell according to one embodiment of the present disclosure;

[0035] Figure 6 is a cross-sectional view schematically showing a configuration of a battery cell according to one embodiment of the present disclosure;

[0036] Figure 7 is an exploded perspective view schematically showing a configuration of a guide member according to an embodiment of the present disclosure;

[0037] Figure 8 is a cross-sectional view schematically showing a configuration of a guide member according to an embodiment of the present disclosure;

[0038] Fig. 9 and Fig.10 is a cross-sectional perspective view schematically showing a configuration of a guide member according to one embodiment of the present disclosure;

[0039] Fig.11 and Fig.12 is an enlarged view schematically showing a configuration of a buffer member according to an embodiment of the present disclosure;

[0040] Fig.13 is a view schematically showing a configuration of a fourth sealing member according to one embodiment of the present disclosure; and

[0041] Fig.14 is a view schematically showing a configuration of a vehicle according to one embodiment of the present disclosure. DETAILED DESCRIPTION

[0042] 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 limited to the usual or dictionary meanings, and should be interpreted as meanings and concepts consistent with the technical concept of the present disclosure based on the principle that the inventor can be his / her own lexicon compiler to appropriately define the concepts of the terms.

[0043] The embodiments described in this specification and the configurations shown in the accompanying drawings are provided as some example embodiments of the present disclosure and do not represent all technical concepts, aspects and features of the present disclosure. Therefore, it should be understood that when submitting this application, there may be various equivalents and modifications that can replace or modify the embodiments described herein.

[0044] 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 may be directly on, directly connected to, or coupled to the other element or layer, or one or more intermediate elements or layers may also 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 intermediate elements or layers. For example, when a first element is described as being "coupled to" or "coupled to" a second element, the first element may be directly coupled to or coupled to the second element, or the first element may be indirectly coupled to or coupled to the second element via one or more intermediate elements.

[0045] In the accompanying drawings, for clarity, the sizes of various elements, layers, etc. may be exaggerated. The same reference numerals represent the same or similar elements. As used herein, the term "and / or" includes any and all combinations of one or more associated listed items. In addition, when describing the embodiments of the present disclosure, the use of "may" relates to "one or more embodiments of the present disclosure". Statements such as "at least one of ... " and "any one of ... " modify the entire element list when they are before the element list, without 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 of the group selected from A, B and C" or "at least one of A, B and C" are used to specify the list of elements A, B and C, the phrase may refer to any and all suitable combinations or subsets of A, B and C, such as A, B, C, A and B, A and C, B and C, or A and B and C. As used herein, the terms "use," "using," and "used" may be considered synonymous with the terms "utilize," "utilizing," and "utilized," respectively. As used herein, the terms "substantially," "about," and similar terms are used as terms of approximation rather than terms of degree, and are intended to take into account the inherent variations in measured or calculated values ​​that one of ordinary skill in the art would recognize.

[0046] 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 parts, these elements, components, regions, layers and / or parts should not be limited by these terms. These terms are used to distinguish one element, component, region, layer or part from another element, component, region, layer or part. Therefore, without departing from the teachings of the exemplary embodiments, the first element, component, region, layer or part discussed below may be referred to as a second element, component, region, layer or part.

[0047] For ease of description, spatially relative terms such as "below", "below", "lower", "above", "upper", etc. may be used herein to describe the relationship between one element or feature as shown in the figure and another one or more elements or features. It should be understood that in addition to the orientation shown in the figure, the spatially relative terms are intended to cover different orientations of the device in use or operation. For example, if the device in the accompanying drawings is turned over, the elements described as "below" or "below" other elements or features will be oriented to be "above" or "above" other elements or features. Therefore, the term "below" can cover both above and below orientations. The device can be oriented in other ways (e.g., rotated 90 degrees or in other orientations), and the spatially relative descriptors used herein should be interpreted accordingly.

[0048] 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 forms "a" and "an" are intended to also include plural forms, unless the context clearly states otherwise. It should also be understood that when used in this specification, the terms "includes", "including", "comprises" and / or "comprising" specify the presence of the features, wholes, steps, operations, elements and / or parts, but do not exclude the presence or addition of one or more other features, wholes, steps, operations, elements, parts and / or groups thereof.

[0049] In addition, any numerical range disclosed and / or described herein is intended to include all sub-ranges of the same numerical precision contained in the range. For example, the range of "1.0 to 10.0" is intended to include all sub-ranges between the minimum value 1.0 and the maximum value 10.0 (and including endpoints), that is, having a minimum value equal to or greater than 1.0 and a maximum value equal to or less than 10.0, such as, for example, 2.4 to 7.6. Any maximum numerical limit described herein is intended to include all lower numerical limits contained therein, and any minimum numerical limit described in this specification is intended to include all higher numerical limits contained therein. Therefore, the applicant reserves the right to modify this specification (including claims) to explicitly describe any sub-ranges contained in the range explicitly described herein.

[0050] Referring to two compared elements, features, etc. as "the same" may mean that they are "substantially the same." Thus, the phrase "substantially the same" may include situations with deviations that are considered low in the art, such as 5% or less. Additionally, when a parameter is referred to as being uniform in a given area, it may mean that it is uniform in terms of average value.

[0051] Throughout the specification, unless otherwise specified, each element may be in the singular or in the plural.

[0052] When any element is referred to as being arranged (or positioned or located) "on (or below)" or "on (or under)" a component, it may mean that the arbitrary element is placed in contact with the upper (or lower) surface of the component, and may also mean that another component may be interposed between the component and any arbitrary element arranged (or positioned or located) on (or under) the component.

[0053] 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 intermediate elements may be present between them, through which the element may be “coupled,” “linked,” or “connected” to another element. In addition, when a component is referred to as being “electrically coupled” to another component, the component may be directly electrically connected to the other component, or one or more intermediate components may be present therebetween, so that the component and the other component are indirectly electrically connected to each other.

[0054] Throughout the specification, unless otherwise specified, 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 multiple items. When "C to D" is stated, unless otherwise specified, it means C or greater and D or less.

[0055] 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.

[0056] Figure 1 is a perspective view schematically showing a configuration of a battery pack according to one embodiment of the present disclosure,

[0057] Figure 2 is a bottom perspective view schematically showing a configuration of a battery pack according to one embodiment of the present disclosure,

[0058] Figure 3 is an exploded perspective view schematically showing a configuration of a battery pack according to one embodiment of the present disclosure, Figure 4 is a cross-sectional view schematically showing a configuration of a battery pack according to one embodiment of the present disclosure.

[0059] The first direction described below can be shown as being based on Figures 1 to 3 The first direction is shown as a direction parallel to the Y-axis, and the second direction can be shown as a direction parallel to the X-axis.

[0060] Reference Figures 1 to 4, the battery pack 1 according to the present embodiment includes a case 100 , a battery cell 200 , a guide member 300 , and a buffer member 400 .

[0061] The case 100 forms a basic appearance of the battery pack 1 , and may serve as a component that completely supports the battery cells 200 , the guide member 300 , and the buffer member 400 , which will be described below.

[0062] The case 100 may include a case body 110 , a first cover 120 , and a second cover 130 .

[0063] The case body 110 may include a body 111 , a first partition wall 112 , and a second partition wall 113 .

[0064] The body 111 may be formed to have a box shape, the interior of which is empty and the upper and lower sides are open. The cross-sectional shape of the body 111 is not limited to Figure 3 The shape shown in FIG. 1 and may be changed in design to various shapes according to the number, arrangement form, etc. of battery cells 200 to be described below.

[0065] The first partition wall 112 and the second partition wall 113 are disposed inside the main body 111 and can separate the internal space of the main body 111. That is, the first partition wall 112 and the second partition wall 113 can be used as components to enhance the structural rigidity of the main body 111 and to divide the internal space of the main body 111 in which the battery cell 200 is accommodated into a plurality of accommodating spaces. The first partition wall 112 and the second partition wall 113 can be disposed to cross each other. For example, the first partition wall 112 can be disposed so that its longitudinal direction is parallel to the first direction, and the second partition wall 113 can be disposed so that its longitudinal direction is parallel to the second direction.

[0066] One or more first partition walls 112 and one or more second partition walls 113 may be formed. Figure 3 As shown, the first partition wall 112 may be formed as a single partition wall, and the second partition wall 113 may be formed as a plurality of partition walls. The first partition wall 112 may be disposed in the central portion of the body 111, and the plurality of second partition walls 113 may be arranged at predetermined intervals in a direction parallel to the first direction. As an example, Figure 3 The case where the first partition wall 112 is formed as a single partition wall is shown, but alternatively, a plurality of first partition walls 112 may be formed. In this case, the plurality of first partition walls 112 may be arranged at predetermined intervals in a direction parallel to the second direction. The number of the first partition walls 112 and the second partition walls 113 may be variously changed in design according to the size of the body 111, the number of the battery cells 200, etc., which will be described below.

[0067] The first cover 120 and the second cover 130 are coupled to the case body 110 , and may close an inner space of the case body 110 .

[0068] In an example, the first cover 120 may be formed to have a substantially plate shape and disposed to face the lower side surface of the case body 110. The first cover 120 may be fixed to the case body 110 by various types of coupling methods such as bolting, welding, and fitting.

[0069] The second cover 130 may be formed to have a substantially plate shape and disposed to face an upper side surface of the case body 110. The second cover 130 may be fixed to the case body 110 by various types of coupling methods such as bolting, welding, and fitting.

[0070] The housing 100 may further include a cooling passage 140 .

[0071] The cooling channel 140 may be provided inside the second cover 130 and may provide a flow path for a refrigerant supplied from the outside. The cooling channel 140 may be used as a component for cooling the battery cell 200 by a heat exchange effect between the refrigerant flowing therethrough and the battery cell 200, which will be described below. The cooling channel 140 may extend to form a zigzag shape in the second cover 130 so that the refrigerant circulates throughout the entire area of ​​the second cover 130. The refrigerant flowing through the cooling channel 140 may be changed in design to various types of heat exchange media, such as water, insulating oil, etc.

[0072] The battery cell 200 may be used as a unit structure for storing and supplying electric power in the battery pack 1 .

[0073] Figure 5 is a perspective view schematically showing a configuration of a battery cell according to one embodiment of the present disclosure, and Figure 6 is a cross-sectional view schematically illustrating a configuration of a battery cell according to one embodiment of the present disclosure.

[0074] Reference Figure 5 and Figure 6 The battery cell 200 may include at least one electrode assembly 10, a shell 20, and a cap assembly 30 coupled to an opening of the shell 20, in which the separator 13 as an insulator is inserted between the positive electrode 11 and the negative electrode 12 and wound together, and the electrode assembly 10 is embedded in the shell 20.

[0075] Hereinafter, a case where the battery cell 200 is a lithium ion secondary battery and has a prismatic shape will be described as an example. However, the present disclosure is not limited thereto, and the battery cell 200 may be a lithium polymer battery or a cylindrical battery.

[0076] The positive electrode 11 and the negative electrode 12 may include a coated portion, which is a region where an active material is applied on a current collector formed of a thin metal foil, and uncoated portions 11a and 12a, which are regions where the active material is not applied.

[0077] The positive electrode 11 and the negative electrode 12 may be wound after inserting the separator 13 as an insulator therebetween. However, the present disclosure is not limited thereto, and the electrode assembly 10 may have a structure in which positive and negative electrodes (each formed of a plurality of sheets) are alternately stacked while inserting a separator therebetween.

[0078] The case 20 forms the overall appearance of the battery cell 200 and may be formed of a conductive metal such as aluminum, an aluminum alloy, or nickel-plated steel. In addition, the case 20 may provide a space in which the electrode assembly 10 is accommodated.

[0079] The cap assembly 30 may include a cap plate 31 configured to cover the opening of the case 20, and the case 20 and the cap plate 31 may be made of a conductive material. Here, the terminal 21 electrically connected to the positive electrode 11 or the negative electrode 12 may be installed to protrude to the outside through the cap plate 31.

[0080] In addition, the terminal 21 protruding to the outside of the cap plate 31 may be formed as a pair. A pair of terminals 21 may be connected to the positive electrode 11 and the negative electrode 12, respectively, and may be used as the positive electrode terminal and the negative electrode terminal of the battery cell 200, respectively. More specifically, the terminal 21 may be electrically connected to a current collector, which includes a first current collector 40 and a second current collector 50 (hereinafter referred to as a positive electrode current collector and a negative electrode current collector) respectively joined to the positive electrode uncoated portion 11a and the negative electrode uncoated portion 12a by welding. For example, a pair of terminals 21 may be respectively bonded to the positive electrode current collector 40 and the negative electrode current collector 50 by welding. However, the present disclosure is not limited thereto, and the terminal 21 may be integrally bonded to the positive electrode current collector 40 and the negative electrode current collector 50, respectively. The outer peripheral surface of the upper column of the terminal 21 may be threaded and may be fixed to the cap plate 31 with a nut.

[0081] However, the present disclosure is not limited thereto, and the terminal 21 may have a rivet structure and may be riveted to the cap plate 31 or welded to the cap plate 31 .

[0082] In addition, the cap plate 31 may be made of a thin plate and coupled to the opening of the case 20. In the cap plate 31, an electrolyte injection hole 32 in which the sealing cap 33 may be installed may be formed, and a gas exhaust port 34 may be installed.

[0083] The exhaust port 34 may be opened and closed in conjunction with changes in the internal pressure of the case 20. That is, the exhaust port 34 may seal the case 20 by maintaining a closed state during normal operation of the electrode assembly 10. The exhaust port 34 may be opened as the internal pressure of the case 20 increases to a set size or more due to overcharge, fire occurrence, etc., and may discharge emissions such as flames and gas from the inside of the case 20 to the outside of the case 20.

[0084] In addition, an insulating member may be installed between the electrode assembly 10 and the cap plate 31. Here, the insulating member may include first and second lower insulating members 60 and 70, and each of the first and second lower insulating members 60 and 70 may be installed between the electrode assembly 10 and the cap plate 31.

[0085] In addition, according to the present embodiment, one end of a separation member that may be installed to face one side surface of the electrode assembly 10 may be installed between the insulating member and the terminal 21 .

[0086] Here, the separation member may include a first separation member 80 and a second separation member 90 .

[0087] Therefore, one end of the first separation member 80 and one end of the second separation member 90 can be respectively installed between the first lower insulating member 60 and the second lower insulating member 70 and a pair of terminals 21, and each of the first separation member 80 and the second separation member 90 can be installed to face a side surface of the electrode assembly 10.

[0088] As a result, the terminals 21 welded to the positive and negative electrode collectors 40 and 50 may be coupled to the first and second lower insulating members 60 and 70 and one end of the first and second separating members 80 and 90 , respectively.

[0089] The battery cell 200 may include a first surface 201 and a second surface 202 opposite to each other. Here, the first surface 201 may refer to the top surface of the cap plate 31, and the second surface 202 may refer to the bottom surface of the housing 20. Therefore, the terminal 21 and the vent 34 may be formed on the first surface 201 of the battery cell 200.

[0090] The battery cell 200 may be disposed inside the case 100. The first surface 201 of the battery cell 200 may be disposed to face the first cover 120 in the case 100. That is, the first surface 201 may be disposed to face downward, and the terminal 21 and the vent 34 formed on the first surface 201 may also be disposed to face downward.

[0091] The second surface 202 of the battery cell 200 may be disposed to face the second cover 130. That is, the second surface 202 may be disposed to face upward. The second surface 202 may be spaced apart from the second cover 130 by a predetermined distance.

[0092] A heat dissipation member 141 for improving heat exchange efficiency between the battery cell 200 and the refrigerant flowing through the cooling channel 140 may be installed between the second surface 202 and the second cover 130. The heat dissipation member 141 may be formed of a material having high thermal conductivity, such as thermal glue. The heat dissipation member 141 may be applied to the second cover 130 or the second surface 202 in a liquid or gel state, and then cured and fixed between the second surface 202 and the second cover 130. The shape of the heat dissipation member 141 is not limited to Figure 3 and Figure 4 The shape shown in the figure may be variously changed in design according to the shape of the battery cell 200, the distance between the second surface 202 and the second cover 130, etc.

[0093] A plurality of battery cells 200 may be provided. A plurality of battery cells 200 may be disposed inside the housing 100. A plurality of battery cells 200 may be disposed in a set number and form for each different accommodation space of the housing 100, the accommodation space being separated by the main body 111, the first partition wall 112, and the second partition wall 113. A plurality of battery cells 200 may be arranged in the housing 100 along a first direction. The battery cells 200 arranged in the first direction may be arranged in multiple rows in the second direction. For example, 24 battery cells 200 may be arranged in each accommodation space of the housing 100 along the first direction, and the 24 battery cells 200 arranged in the first direction may be arranged in two rows along the second direction. However, the number and arrangement form of the plurality of battery cells 200 are not limited thereto, and may be changed to various numbers and arrangement forms in design.

[0094] The guide member 300 may be disposed between the housing 100 and the first surface 201 of the battery cell 200. The guide member 300 may serve as a component for guiding the flow of exhaust in the housing 100, and the exhaust is discharged from the exhaust port 34 in the event of explosion or thermal runaway of the battery cell 200. Here, the exhaust may be various materials such as gas, flame, smoke, and other diffused materials discharged from the exhaust port 34 in the event of explosion or thermal runaway of the battery cell 200.

[0095] Figure 7 is an exploded perspective view schematically showing a configuration of a guide member according to an embodiment of the present disclosure, Figure 8 is a cross-sectional view schematically showing a configuration of a guide member according to an embodiment of the present disclosure, Fig. 9 and Fig.10is a cross-sectional perspective view schematically illustrating a configuration of a guide member according to one embodiment of the present disclosure.

[0096] Reference Figures 1 to 10 , the guide member 300 may include a bus bar holder 310 , a vent bracket 320 , a transfer hole 330 , a first chamber 340 , and a second chamber 350 .

[0097] The bus bar holder 310 may be disposed between the first cover 120 and the first surface 201 of the battery cell 200. The bus bar holder 310 is formed to have a substantially plate shape and may be seated on the first surface 201 of the battery cell 200. The bus bar holder 310 may be formed of an electrically insulating material.

[0098] A plurality of bus bar holders 310 may be provided. The plurality of bus bar holders 310 may be individually disposed in accommodation spaces of the housing 100 separated by the body 111, the first partition wall 112, and the second partition wall 113. The area of ​​the bus bar holder 310 may be smaller than the area of ​​each accommodation space, and may be larger than the sum of the areas of the first surfaces 201 of each of the plurality of battery cells 200 disposed in each accommodation space.

[0099] The bus bar holder 310 may include a bus bar 311 .

[0100] The bus bar 311 may be supported by the bus bar holder 310 and electrically connected to the terminal of the battery cell 200. The bus bar 311 may be exemplified by various types of connection members that may be electrically connected to the battery cell 200 to form a charging and discharging path of the battery cell 200. The bus bar 311 may be formed of a conductive material such as nickel, aluminum, copper, etc. One surface of the bus bar 311 may be fixed to the terminal 21 of the battery cell 200 by welding or the like. The other surface of the bus bar 311 may be disposed to face the first cover 120.

[0101] A plurality of bus bars 311 may be provided. The plurality of bus bars 311 may be disposed at positions facing the terminals 21 of the plurality of battery cells 200. The plurality of bus bars 311 may be arranged in a plurality of rows in the first direction and the second direction. The shape and arrangement form of the plurality of bus bars 311 are not limited to Figure 3 and Figure 7 , and may be variously changed in design according to the series or parallel connection structure between the plurality of battery cells 200 .

[0102] A flexible circuit board (not shown) and various sensors (not shown) capable of detecting state information of each battery cell 200 , such as temperature, current, and voltage, may be additionally installed in the bus bar holder 310 .

[0103] The vent bracket 320 may be disposed between the first cover 120 and the bus bar holder 310. The vent bracket 320 may support the battery cell 200 and the bus bar holder 310 relative to the first cover 120. The vent bracket 320 may separate the first cover 120 and the bus bar holder 310 from each other, thereby providing a space between the first cover 120 and the bus bar holder 310, in which a first chamber 340 and a second chamber 350 described below may be formed. The thickness of the vent bracket 320 may be 0.5 mm to 3 mm.

[0104] The ventilation bracket 320 may include a bracket body 321 , a first extending portion 322 , and a second extending portion 323 .

[0105] The bracket body 321 may form the appearance of the central part of the vent bracket 320. The bracket body 321 may be formed to have a cup shape, the interior of which is empty and the lower side is open. The bracket body 321 may be disposed between the bus bar holder 310 and the first cover 120. The open side of the bracket body 321 (i.e., the lower side surface of the bracket body 321) may be disposed to face the first cover 120. The upper side surface of the bracket body 321 may be disposed to face the bus bar holder 310. The upper side surface of the bracket body 321 may be spaced apart from the bus bar holder 310, and alternatively, may be in direct contact with the bus bar holder 310. The upper side surface of the bracket body 321 may be disposed to face the exhaust port 34 of the battery cell 200, and the bus bar holder 310 is interposed between the upper side surface of the bracket body 321 and the exhaust port 34 of the battery cell 200.

[0106] The support body 321 may extend in a longitudinal direction parallel to the first direction. Therefore, the upper side surface of the support body 321 may be arranged to face the exhaust ports 34 of the plurality of battery cells 200 arranged in the first direction, and the bus bar holder 310 is located between the upper side surface of the support body 321 and the exhaust ports 34 of the plurality of battery cells 200.

[0107] A plurality of support bodies 321 may be provided. Each of the support bodies 321 may be individually provided for each different row of the battery cells 200 arranged in the first direction.

[0108] The first extension portion 322 may form an appearance of an edge of the bracket body 321. The first extension portion 322 may extend from a lower end portion of the bracket body 321 in a width direction of the bracket body 321 (i.e., in a direction parallel to the second direction). The first extension portion 322 may contact an upper side surface of the first cover 120. Therefore, the first extension portion 322 may support the bracket body 321 between the bus bar holder 310 and the first cover 120.

[0109] The second extending portion 323 may extend from the first extending portion 322 and may contact the case body 110. The second extending portion 323 may be formed to protrude upward from the first extending portion 322 toward the bus bar holder 310.

[0110] A plurality of second extension portions 323 may be provided. The plurality of second extension portions 323 may be individually provided for each position facing the second partition wall 113 in the entire region of the first extension portion 322. An upper side surface of the second extension portion 323 may contact a lower side surface of the second partition wall 113.

[0111] The second extension portion 323 may be formed to have a Fig.10 The hollow interior is shown, or alternatively, may be formed to have a filled interior.

[0112] The transfer hole 330 may be used as a component that provides a path through which the exhaust discharged from the exhaust port 34 is transferred to the first chamber 340, which will be described below. The transfer hole 330 may be formed in the shape of a hole that vertically passes through the bus bar holder 310 and the vent bracket 320 (more specifically, the bracket body 321). Both the upper and lower ends of the transfer hole 330 may be connected to the exhaust port 34 and the first chamber 340 of the battery cell 200, respectively, which will be described below. The transfer hole 330 may be disposed to face the exhaust port 34 of the battery cell 200. In addition Fig. 9 In addition to the illustrated elliptical shape, the cross-sectional shape of the transmission hole 330 may be changed in design to various shapes such as a circular shape, a polygonal shape, etc.

[0113] A plurality of transmission holes 330 may be provided. The plurality of transmission holes 330 may be arranged at predetermined intervals in the longitudinal direction of the bracket body 321 (i.e., in the first direction). The plurality of transmission holes 330 may be disposed to face the exhaust ports 34 formed in different battery cells 200, respectively. The gap between adjacent transmission holes 330 may be the same as the gap between the exhaust ports 34 formed in adjacent battery cells 200.

[0114] The first chamber 340 may be disposed inside the vent bracket 320. The first chamber 340 may refer to a space surrounded by the inner side surface of the vent bracket 320 in the entire space formed between the bus bar holder 310 and the first cover 120. The upper end of the first chamber 340 may be connected to the lower end of the transmission hole 330 vertically through the bus bar holder 310 and the vent bracket 320. The longitudinal direction of the first chamber 340 may be parallel to the longitudinal direction of the vent bracket 320. That is, the first chamber 340 may be formed in a shape having a flow path whose longitudinal direction extends in the first direction. The end of the first chamber 340 in the longitudinal direction may be connected to the external space of the housing 100. Therefore, in the event of an explosion or thermal runaway of the battery cell 200, the exhaust discharged from the exhaust port 34 may be discharged to the external space of the housing 100 through the transmission hole 330 and the first chamber 340 in sequence. The height of the first chamber 340 may be 12 mm or more and 20 mm or less.

[0115] The second chamber 350 may be provided outside the ventilation bracket 320. The second chamber 350 may refer to a space excluding the first chamber 340 from the entire space formed between the bus bar holder 310 and the first cover 120. The longitudinal direction of the second chamber 350 may be parallel to the longitudinal direction of the ventilation bracket 320. That is, the second chamber 350 may be formed in a shape having a flow path whose longitudinal direction extends in the first direction. The bus bar 311 connected to the terminal 21 of the battery cell 200 and the buffer member 400 to be described below may be accommodated in the second chamber 350.

[0116] The first chamber 340 and the second chamber 350 may be alternately arranged in a second direction intersecting the first direction. That is, a pair of second chambers 350 may be respectively arranged on both sides of one first chamber 340. Therefore, in the battery pack according to the present embodiment, the volume ratio of the battery cell 200 can be increased by integrating the exhaust path into the space for bollard performance evaluation via impact analysis.

[0117] The guide member 300 may further include a sealing member 360 .

[0118] The sealing member 360 may serve as a component for sealing the first chamber 340 and the transfer hole 330 in order to prevent the exhaust discharged from the exhaust port 34 from leaking from the first chamber 340 and the transfer hole 330 .

[0119] The sealing member 360 may include a first sealing member 361 , a second sealing member 362 , and a third sealing member 363 .

[0120] The first sealing member 361 can be disposed between the first cover 120 and the first extension portion 322, and can be sealed between the first cover 120 and the first extension portion 322. The first sealing member 361 can be formed to have a substantially strip-shaped shape, and its upper surface and lower surface can be in contact with the lower side surface of the first extension portion 322 and the upper side surface of the first cover 120, respectively. The first sealing member 361 can be a glue or adhesive that is applied between the first cover 120 and the first extension portion 322 in a liquid or gel state and then solidified. Alternatively, the first sealing member 361 can be formed of an elastically deformable material such as rubber, silicone, etc. Therefore, the upper and lower surfaces of the first sealing member 361 can be more firmly attached to the first cover 120 and the first extension portion 322 by its own elastic restoring force. The specific shape of the first sealing member 361 is not limited to Figure 7 The shape shown in FIG. 1 and may be changed in design to various forms capable of sealing between the first cover 120 and the first extension portion 322 .

[0121] The second sealing member 362 may be disposed between the bus bar holder 310 and the bracket body 321, and may be sealed between the bus bar holder 310 and the bracket body 321. The second sealing member 362 may be formed to have a substantially strip-shaped shape, and its upper surface and lower surface may contact the lower side surface of the bus bar holder 310 and the upper side surface of the bracket body 321, respectively. For any one bracket body 321, the second sealing member 362 may be disposed in pairs. A pair of second sealing members 362 may be disposed to face each other with a transmission hole 330 therebetween.

[0122] The second sealing member 362 may be a glue or adhesive that is applied between the bus bar holder 310 and the bracket body 321 in a liquid or gel state and then cured. Alternatively, the second sealing member 362 may be formed of an elastically deformable material such as rubber, silicone, etc. Therefore, the upper and lower surfaces of the second sealing member 362 may be more firmly attached to the bus bar holder 310 and the bracket body 321 by their own elastic restoring force. The specific shape of the second sealing member 362 is not limited to Figure 7 The shape shown in the figure may be changed in design to various forms capable of sealing between the bus bar holder 310 and the bracket body 321 .

[0123] The third sealing member 363 may be disposed between the bus bar holder 310 and the first surface 201 of the battery cell 200, and may be sealed between the bus bar holder 310 and the first surface 201. The third sealing member 363 may be formed to have a substantially strip-shaped shape, and its upper surface and lower surface may contact the first surface 201 and the upper side surface of the bus bar holder 310, respectively. For any one of the bracket bodies 321, the third sealing members 363 may be disposed in pairs. A pair of third sealing members 363 may be disposed to face each other with a transmission hole 330 therebetween.

[0124] The third sealing member 363 may be a glue or adhesive that is applied between the bus bar holder 310 and the first surface 201 of the battery cell 200 in a liquid or gel state and then cured. Alternatively, the third sealing member 363 may be formed of an elastically deformable material such as rubber, silicone, etc. Therefore, the upper and lower surfaces of the third sealing member 363 may be more firmly attached to the bus bar holder 310 and the first surface 201 by their own elastic restoring force. The specific shape of the third sealing member 363 is not limited to Figure 7 The shape shown in FIG. 1 is different from that shown in FIG. 1 and may be changed in design to various forms capable of sealing between the bus bar holder 310 and the first surface 201 .

[0125] The guide member 300 may further include a fixing member 370 .

[0126] The fixing member 370 may be connected to the vent bracket 320 and may prevent the vent bracket 320 from moving between the bus bar holder 310 and the first cover 120. Therefore, the fixing member 370 may prevent the sealing performance of the sealing member 360 sealing the transfer hole 330 and the first chamber 340 from being deteriorated due to the movement of the vent bracket 320.

[0127] The fixing member 370 may include a first fixing body 371 , a second fixing body 372 , and a pressing flange 373 .

[0128] The first fixing body 371 may be formed in a rod shape vertically passing through the second extension part 323 in a vertical direction. An upper end portion of the first fixing body 371 may pass through the second extension part 323 and may be inserted into the case body 110, more specifically, into the second partition wall 113. A screw thread may be formed on an outer circumferential surface of the first fixing body 371.

[0129] The second fixed body 372 can be coupled to the first fixed body 371, and can prevent the first fixed body 371 from being separated from the second extension portion 323. The second fixed body 372 can be disposed inside the housing body 110, more specifically, inside the second partition wall 113. The second fixed body 372 can be formed in the shape of a hollow ring, and a thread is formed on its inner circumferential surface. The inner side surface of the second fixed body 372 can be threadedly coupled to the outer side surface of the first fixed body 371. When the second fixed body 372 is fully coupled to the first fixed body 371, the lower side surface of the second fixed body 372 can contact the inner side surface of the second partition wall 113. Therefore, when the second fixed body 372 is fully coupled to the first fixed body 371, due to the contact force with the second partition wall 113, the first fixed body 371 can be prevented from being separated from the second partition wall 113 and the second extension portion 323.

[0130] The pressing flange 373 may extend from the first fixing body 371, and press the second extension portion 323 toward the housing body 110 by interlocking with the first fixing body 371 and the second fixing body 372. The pressing flange 373 may have a shape of a circular plate extending from the lower end of the first fixing body 371 in the radial direction of the first fixing body 371. When the upper end of the first fixing body 371 is inserted into the second partition wall 113, the upper side surface of the pressing flange 373 may contact the outer side surface of the second extension portion 323. When the second fixing body 372 is completely coupled to the first fixing body 371, the pressing flange 373 may press the second extension portion 323 toward the housing body 110 by a force generated by the contact between the second fixing body 372 and the second partition wall 113.

[0131] The guide member 300 may further include a reinforcing member 380 .

[0132] The reinforcing member 380 may be provided in the vent bracket 320 and may reinforce the rigidity of the vent bracket 320. That is, the reinforcing member 380 may serve as a component for preventing deformation of the vent bracket 320 caused by the pressure of exhaust discharged from the exhaust port 34 by increasing the inherent rigidity of the vent bracket 320.

[0133] In an example, the reinforcing member 380 may have a shape of a rib protruding from the upper side surface of the bracket body 321 toward the first chamber 340. The reinforcing member 380 may be formed so that its longitudinal direction is parallel to the width direction of the bracket body 321, that is, the second direction. A plurality of reinforcing members 380 may be provided. The plurality of reinforcing members 380 may be arranged at predetermined intervals in the longitudinal direction (that is, the first direction) of the bracket body 321. In this case, the plurality of transmission holes 330 and the plurality of reinforcing members 380 may be alternately arranged in the longitudinal direction (that is, the first direction) of the bracket body 321.

[0134] The buffer member 400 may be disposed between the housing 100 and the first surface 201 of the battery cell 200. The buffer member 400 may be disposed to face the terminal 21 of the battery cell 200, and may absorb an impact applied to the terminal 21. That is, the buffer member 400 may serve as a component for preventing damage to the battery cell 200, the terminal 21, and the bus bar 311 due to an impact applied from the outside of the housing 100.

[0135] Fig.11 and Fig.12 is an enlarged view schematically showing the configuration of a buffer member according to one embodiment of the present disclosure.

[0136] Reference Figures 1 to 12 , the buffer member 400 may include a first pad 410 and a second pad 420 .

[0137] The first and second pads 410 and 420 may be disposed between the bus bar holder 310 and the first cover 120, more specifically, within the second chamber 350. The first and second pads 410 and 420 may be disposed on both sides of the vent bracket 320, respectively, with the vent bracket 320 interposed therebetween.

[0138] The first pad 410 may be arranged to face one of the pair of terminals 21 of the battery cell 200. In an example, the first pad 410 may be arranged to face the terminal 21 of the pair of terminals 21 of the battery cell 200, which is adjacent to the first partition wall 112 or the body 111. The first pad 410 may be arranged to face the terminal 21, and the bus bar 311 is interposed between the first pad 410 and the terminal 21. The lower side surface of the first pad 410 may be in contact with the upper side surface of the first cover 120. The upper side surface of the first pad 410 may be spaced apart from the bus bar 311, and alternatively, may be in direct contact with the bus bar 311. The first pad 410 may be formed of an elastically deformable material. Therefore, the first pad 410 may be elastically deformed by an impact applied from the outside, and absorbs the impact transmitted to the bus bar 311 and the terminal 21.

[0139] The first pad 410 may be formed of an insulating material. Therefore, the first pad 410 may electrically insulate the bus bar 311 and the terminal 21 from the first cover 120, thereby preventing safety accidents caused by short circuits, etc. In an example, the first pad 410 may include at least one of silicone, rubber, and other synthetic resin materials that are elastically deformable and have insulating properties.

[0140] The first pad 410 may include a first protrusion 411. The first protrusion 411 may protrude upward from the upper side surface of the first pad 410 and may contact the lower side surface of the bus bar holder 310. In this case, the first pad 410 may be disposed to completely surround the bus bar 311 protruding downward from the bus bar holder 310. Therefore, when an impact is applied from the outside, the first pad 410 may be prevented from changing position relative to the bus bar 311.

[0141] The second pad 420 may be arranged to face the remaining one terminal 21 of the pair of terminals 21 of the battery cell 200. In the example, the second pad 420 may be arranged to face the terminal 21 of the pair of terminals 21 of the battery cell 200 that is adjacent to the battery cell 200 in the second direction. The second pad 420 may be arranged to face the terminal 21, and the bus bar 311 is interposed between the second pad 420 and the terminal 21. The lower side surface of the second pad 420 may be in contact with the upper side surface of the first cover 120. The upper side surface of the second pad 420 may be spaced apart from the bus bar 311, and alternatively, may be in direct contact with the bus bar 311. The second pad 420 may be formed of an elastically deformable material such as rubber or silicone. Therefore, the second pad 420 may be elastically deformed by an impact applied from the outside, and absorbs the impact transmitted to the bus bar 311 and the terminal 21.

[0142] The second pad 420 may be formed of an insulating material. Therefore, the second pad 420 may electrically insulate the bus bar 311 and the terminal 21 from the first cover 120, thereby preventing safety accidents caused by short circuits, etc. In an example, the second pad 420 may include at least one of silicone, rubber, and other synthetic resin materials that are elastically deformable and have insulating properties.

[0143] The length of the second pad 420 parallel to the second direction may be greater than that of the first pad 410. Therefore, the second pad 420 may be formed in each of a pair of battery cells 200 adjacent to each other in the second direction and disposed to face a pair of terminals 21 disposed adjacent to each other.

[0144] The second pad 420 may include a second protrusion 421. The second protrusion 421 may protrude upward from the upper side surface of the second pad 420 and may contact the lower side surface of the bus bar holder 310. In this case, the second pad 420 may be disposed to completely surround the bus bar 311 protruding downward from the bus bar holder 310. Therefore, when an impact is applied from the outside, the second pad 420 may be prevented from changing position relative to the bus bar 311.

[0145] Fig.13 is a view schematically showing a configuration of a fourth sealing member according to one embodiment of the present disclosure.

[0146] Reference Fig.13 , the sealing member 360 may further include a fourth sealing member 364 .

[0147] The fourth sealing member 364 may be disposed in the second chamber 350. The fourth sealing member 364 may serve as a component that blocks the emission discharged from the first chamber 340 or the transmission hole 330 to the second chamber 350 from spreading in the second chamber 350. Therefore, even when the first sealing member 361, the second sealing member 362, and the third sealing member 363 are damaged or deviated from their normal positions due to external impact, pressure rise caused by thermal runaway of the battery cell 200, etc., the fourth sealing member 364 may preliminarily ensure sealing performance relative to the first chamber 340 or the transmission hole 330.

[0148] The fourth sealing member 364 may include a material having excellent sealing performance and having insulating properties and heat resistance. In an example, the fourth sealing member 364 may include at least one material of silicone, rubber, epoxy, polyurethane, and aerogel.

[0149] The fourth sealing member 364 may be injected into the second chamber 350 in a liquid or gel state and then solidified. Alternatively, the fourth sealing member 364 may be manufactured in a solid state and then inserted into the second chamber 350. The fourth sealing member 364 may be fixed to the surface of the first cover 120, the ventilation bracket 320, the first pad 410, and the second pad 420 facing the inner space of the second chamber 350. The fourth sealing member 364 may be fixed to the surface of the first cover 120, the ventilation bracket 320, the first pad 410, and the second pad 420 by its own adhesive force, or may be pressed onto the surface of the first cover 120, the ventilation bracket 320, the first pad 410, and the second pad 420. Therefore, the fourth sealing member 364 can seal the inner space of the second chamber 350 without a gap.

[0150] Hereinafter, a vehicle according to one embodiment of the present disclosure will be described.

[0151] Fig.14 is a view schematically showing a configuration of a vehicle according to one embodiment of the present disclosure.

[0152] Reference Figures 1 to 14 , the vehicle may include a battery pack 1 and a vehicle body 2 .

[0153] Battery pack 1 with reference Figures 1 to 13 The battery pack 1 described above is configured in the same manner, and thus a repeated description thereof will be omitted.

[0154] The vehicle body 2 forms a frame of the vehicle and supports the battery pack 1. The vehicle body 2 may be exemplified by a frame body, a monocoque body, a skateboard platform, etc., which are generally applied to vehicles. A plurality of wheels that rotate by receiving a driving force from a motor, an engine, etc. may be connected to the vehicle body 2.

[0155] The battery pack 1 may be disposed under the vehicle body 2. For example, the battery pack 1 may be coupled to a floor panel or the like of the vehicle body 2.

[0156] In this case, the first cover 120 of the housing 100 may be disposed to face downward, and the first surface 201 of the battery cell 200 may also be disposed to face downward. Therefore, in the vehicle according to the present embodiment, by integrating the exhaust path into the lower space of the battery pack 1 (which is used for bollard performance evaluation by impact analysis), the volume ratio of the battery cell 200 may be increased and energy efficiency may be improved.

[0157] The above-mentioned vehicle may be variously changed in design within the range of mobile devices (including electric vehicles, hybrid vehicles, electric motorcycles, and other electric vehicles) equipped with the battery pack 1 .

Claims

1. A battery pack comprising: case; A plurality of battery cells, each battery cell including a first surface and a second surface opposite to each other, and a vent and a terminal formed on the first surface, and disposed inside the housing; a guide member disposed between the housing and the first surface and configured to guide a flow of exhaust discharged from the exhaust port; as well as A buffer member is provided between the housing and the first surface and is configured to absorb an impact applied to the terminal.

2. The battery pack according to claim 1, wherein: The housing comprises: Shell body; a first cover coupled to the housing body and disposed to face the first surface; and A second cover is coupled to the housing body and is disposed to face the second surface.

3. The battery pack according to claim 2, wherein: The housing further includes a cooling passage that is disposed inside the second cover and through which a refrigerant flows.

4. The battery pack according to claim 2, wherein: The first surface is arranged to face downward, and The first cover is disposed below the housing body.

5. The battery pack according to claim 2, wherein: The guide member comprises: a bus bar holder disposed between the first cover and the first surface and including a bus bar connected to the terminal; a vent bracket disposed between the first cover and the bus bar holder; a plurality of transfer holes formed through the bus bar holder and the vent bracket; A first chamber disposed inside the ventilation support and connected to the delivery hole; and The second chamber is disposed outside the ventilation bracket and is configured to accommodate the buffer member.

6. The battery pack according to claim 5, wherein: The plurality of battery cells are arranged along a first direction, and The first chamber and the second chamber extend in the first direction.

7. The battery pack according to claim 6, wherein: The first chambers and the second chambers are alternately arranged in a second direction intersecting the first direction.

8. The battery pack according to claim 5, wherein: The ventilation support comprises: a support body, arranged to surround the first chamber; a first extending portion extending from the bracket body and contacting the first cover; and A second extending portion extends from the first extending portion and contacts the housing body.

9. The battery pack according to claim 8, wherein: The guide member further includes a sealing member configured to seal the first chamber and the transfer hole.

10. The battery pack according to claim 9, wherein: The sealing member comprises: a first sealing member disposed between the first cover and the first extending portion; a second sealing member provided between the bus bar holder and the bracket body; and A third sealing member is provided between the bus bar holder and the first surface.

11. The battery pack according to claim 10, wherein: The sealing member further includes a fourth sealing member disposed inside the second chamber.

12. The battery pack according to claim 8, wherein: The guide member also includes a fixing member connected to the vent bracket and configured to prevent movement of the vent bracket.

13. The battery pack according to claim 12, wherein: The fixing member comprises: a first fixing body, passing through the second extending portion and inserted into the housing body; a second fixing body disposed inside the housing body and coupled to the first fixing body; and A pressing flange extends from the first fixing body and is configured to press the second extending portion toward the housing body.

14. The battery pack according to claim 8, wherein: The guide member further includes a plurality of reinforcement members configured to reinforce the rigidity of the ventilation bracket.

15. The battery pack according to claim 14, wherein: The plurality of battery cells are arranged along a first direction, and The transmission holes and the reinforcement members are alternately arranged in the first direction.

16. The battery pack according to claim 15, wherein the reinforcing member protrudes from the bracket body, and The reinforcing member is disposed so that a longitudinal direction thereof is parallel to a second direction intersecting the first direction.

17. The battery pack according to claim 5, wherein: The terminals are provided as a pair, and The buffer member comprises: a first pad disposed on one side of the vent bracket and facing one terminal of the pair of terminals; and A second pad is disposed on the other side of the vent bracket and faces the other terminal of the pair of terminals.

18. The battery pack according to claim 17, wherein: The first pad and the second pad are provided to be elastically deformable.

19. A vehicle comprising: Car body; as well as A battery pack, coupled to the vehicle body, The battery pack comprises: case; a plurality of battery cells, each battery cell including a first surface and a second surface opposite to each other, and a vent and a terminal formed on the first surface, and disposed inside the housing; a guide member disposed between the housing and the first surface and configured to guide a flow of exhaust discharged from the exhaust port; and A buffer member is provided between the housing and the first surface and is configured to absorb an impact applied to the terminal.

20. The vehicle of claim 19, wherein: The battery pack is disposed below the vehicle body, and The first surface is arranged to face downward.

Images