Battery cell and battery module comprising same

Abstract

The present disclosure provides a battery cell and a battery module including the same, the battery cell including: an electrode assembly; a cell case accommodating the electrode assembly and having a vent hole; an exhaust member that seals the exhaust hole and opens if the internal pressure of the cell case increases (e.g., when the internal pressure of the cell case increases); a blocking member installed in the exhaust hole and covering the exhaust member; and a guide member installed in the exhaust hole and guiding the blocking member to open if the exhaust member is open (e.g., when the exhaust member is open). According to the present disclosure, if a fire occurs in any one of the battery cells (e.g., when a fire occurs in any one of the battery cells); the possibility that a plurality of battery cells will be sequentially ignited due to flames, gases, smoke, and / or the like introduced into the vent holes of the battery cells adjacent to the battery cell on fire may be prevented or reduced by using a blocking member covering the vent plate.

Description

Technical Field

[0001] Embodiments of the present disclosure relate to a battery cell and a battery module including the battery cell. Background Art

[0002] Unlike primary batteries, which cannot be recharged, secondary batteries (also known as rechargeable batteries) are batteries that can be discharged and recharged. Low-capacity secondary batteries are used in small portable electronic devices such as smartphones, feature phones, laptop computers, digital cameras, and camcorders, while high-capacity secondary batteries are widely used as power sources for driving motors in hybrid vehicles, electric vehicles, and the like, and as batteries for power storage.

[0003] Such a secondary battery may include an electrode assembly including (eg, consisting of) a positive electrode and a negative electrode, a case accommodating the electrode assembly, an electrode terminal connected to the electrode assembly, and / or the like.

[0004] Secondary batteries can be used as battery modules or battery packs formed by connecting multiple unit battery cells in series and / or in parallel to provide high energy density. A battery module or battery pack can be formed by connecting the electrode terminals of multiple unit battery cells to each other to meet the desired or required amount of power, and, for example, to achieve a high-output secondary battery for electric vehicles.

[0005] The above information disclosed in the background of the disclosure is only for enhancement of understanding of the background of the disclosure and therefore it may contain information that does not constitute prior art. Summary of the Invention

[0006] Aspects of one or more embodiments of the present disclosure are directed to providing a battery cell and a battery module including the battery cell, which are capable of preventing or reducing the possibility of chain ignition of the battery cells and ensuring smooth exhaust performance.

[0007] Additional aspects will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the presented embodiments of the disclosure.

[0008] According to one or more embodiments of the present disclosure, a battery cell includes: an electrode assembly; a cell shell that accommodates the electrode assembly and has a vent hole; a vent member that seals the vent hole and opens if the internal pressure of the cell shell increases (for example, when the internal pressure of the cell shell increases); a blocking member that is installed in the vent hole and covers the vent member; and a guide member that is installed in the vent hole and guides the blocking member to open if the vent member is opened (for example, when the vent member is opened).

[0009] In one or more embodiments of the present disclosure, the guide member may include a guide body disposed inside the blocking member and having a first end in contact with the exhaust member and a second end opposite to the first end.

[0010] In one or more embodiments of the present disclosure, the width of the guide body may increase from the second end portion toward the first end portion.

[0011] In one or more embodiments of the present disclosure, the second end portion may be exposed to the outside of the blocking member.

[0012] In one or more embodiments of the present disclosure, the exhaust component may include: an exhaust plate, fixed to the single body shell and facing the exhaust hole; and a cut-off portion, on the exhaust plate, and including a cut-off line that is cut off if the internal pressure of the single body shell increases (when the internal pressure of the single body shell increases), and the first end portion may be in contact with the cut-off portion.

[0013] In one or more embodiments of the present disclosure, the first end portion may face the cutoff line and extend along the cutoff line.

[0014] In one or more embodiments of the present disclosure, the exhaust member may further include a notch concavely recessed into the cut-off portion and extending along the cut-off line.

[0015] In one or more embodiments of the present disclosure, the first end portion may be inserted into the interior of the recess.

[0016] In one or more embodiments of the present disclosure, the guide body may further include a third end portion contacting an inner surface of the exhaust hole.

[0017] In one or more embodiments of the present disclosure, the blocking member may be injected into the exhaust hole in a liquid state and then solidified.

[0018] In one or more embodiments of the present disclosure, the blocking member may include at least one of silicone, epoxy, urethane, and polyurethane.

[0019] In one or more embodiments of the present disclosure, the guide member may further include dispersed holes passing through the guide body.

[0020] In one or more embodiments of the present disclosure, the dispersion holes may be provided as a plurality of dispersion holes, and the plurality of dispersion holes may be spaced and / or separated (eg, spaced apart or separated) from each other in the extension direction of the guide body.

[0021] The guide member may be separated from the blocking member after the blocking member is cured.

[0022] In one or more embodiments of the present disclosure, the width of the guide body may decrease from the second end portion toward the first end portion.

[0023] In one or more embodiments of the present disclosure, the guide member may further include a gripping portion extending from the second end portion and protruding to the outside of the blocking member.

[0024] According to one or more embodiments of the present disclosure, a battery module includes: a module housing; and one or more battery cells inside the module housing, wherein each of the battery cells includes: an electrode assembly; a cell shell that accommodates the electrode assembly and has an exhaust hole; an exhaust member that seals the exhaust hole and opens if the internal pressure of the cell shell increases (for example, when the internal pressure of the cell shell increases); a blocking member installed in the exhaust hole and covering the exhaust member; and a guide member installed in the exhaust hole and guides the blocking member to open if the exhaust member is opened (for example, when the exhaust member is opened).

[0025] In one or more embodiments of the present disclosure, the battery module may further include: a bus bar bracket inside the module housing and supporting the bus bar connected to the battery cell; and a bracket vent hole passing through the bus bar bracket and facing the vent hole of the battery cell.

[0026] In one or more embodiments of the present disclosure, a cross-sectional area of ​​the vent hole of the bracket may be smaller than a cross-sectional area of ​​the vent hole of the battery cell. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] The accompanying drawings attached to this specification illustrate certain 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] The above and other objects, features and / or principles of the present disclosure will become apparent to those skilled in the art through the following description of embodiments with reference to the accompanying drawings, in which:

[0029] Figure 1 is a perspective view schematically illustrating a configuration of a battery module according to one or more embodiments of the present disclosure;

[0030] Figure 2 is a schematic diagram illustrating one or more embodiments of the present disclosure. Figure 1 A perspective view of the configuration of a battery cell;

[0031] Figure 3 is a schematic diagram illustrating one or more embodiments of the present disclosure. Figure 2 A plan view of the configuration of the battery cells;

[0032] Figure 4 is a schematic diagram illustrating one or more embodiments of the present disclosure. Figure 2 A cross-sectional view of the configuration of a battery cell;

[0033] Figure 5 is an enlarged view schematically illustrating the configuration of an exhaust member according to one or more embodiments of the present disclosure;

[0034] Figure 6 is a schematic diagram illustrating one or more embodiments of the present disclosure. Figure 5 A cross-sectional view of the configuration of the exhaust component;

[0035] Figure 7 is a perspective view schematically illustrating a configuration of a guide member according to one or more embodiments of the present disclosure;

[0036] Figure 8 is a schematic diagram illustrating one or more embodiments of the present disclosure. Figure 7 a plan view of the configuration of the guide member;

[0037] Figure 9 is a schematic diagram illustrating one or more embodiments of the present disclosure. Figure 7 A cross-sectional view of the configuration of the guide member;

[0038] Figure 10 and Figure 11 is a schematic diagram illustrating the injection of a barrier member into a device including a Figure 7 A perspective view of the process of guiding the exhaust hole of the member;

[0039] Figure 12 is an enlarged perspective view schematically illustrating the configuration of a bus bar bracket and bracket vents according to one or more embodiments of the present disclosure;

[0040] Figure 13 is a cross-sectional view schematically illustrating a configuration of a guide member according to one or more embodiments of the present disclosure;

[0041] Figure 14 is a cross-sectional view schematically illustrating a configuration of a guide member according to one or more embodiments of the present disclosure;

[0042] Figure 15is a perspective view schematically illustrating a configuration of a guide member according to one or more embodiments of the present disclosure;

[0043] Figure 16 is a schematic illustration of a barrier member according to one or more embodiments of the present disclosure being injected into a Figure 15 A view of a state of the exhaust hole of the guide member;

[0044] Figure 17 is a perspective view schematically illustrating a configuration of a guide member according to one or more embodiments of the present disclosure;

[0045] Figure 18 is a schematic diagram illustrating one or more embodiments of the present disclosure. Figure 17 A cross-sectional view of the configuration of the guide member;

[0046] Figure 19 and Figure 20 is a schematic diagram illustrating the injection of a barrier member into a device including a Figure 17 a view of the process of guiding the exhaust hole of the member; and

[0047] Figure 21 is a view schematically illustrating a state in which a guide member is separated from a blocking member according to one or more embodiments of the present disclosure. DETAILED DESCRIPTION

[0048] The present disclosure can be modified in various alternative forms, and therefore specific embodiments will be illustrated in the drawings and described in more detail. However, it should be understood that this is not intended to limit the present disclosure to the particular forms disclosed, but is intended to cover all modifications, equivalents and substitutes falling within the spirit and scope of the present disclosure.

[0049] Hereinafter, example embodiments will be described in more detail with reference to the accompanying drawings. However, the present disclosure can be implemented in a variety of different forms and should not be construed as being limited to only the embodiments illustrated herein. On the contrary, these embodiments are provided as examples so that the present disclosure will be thorough and complete and will fully convey the aspects and features of the present disclosure to those skilled in the art. Accordingly, processes, elements, and techniques that are not necessary for a person of ordinary skill in the art to fully understand the aspects and features of the present disclosure may not be described.

[0050] It will be understood that when an element (such as a zone, layer, film, region, or portion) is referred to as being "on," "connected to," or "coupled to" another element, it can be directly on, connected to, or coupled to the other element, or one or more intervening elements may also be present. When an element is referred to as being "directly on," "directly connected to," or "directly coupled to" another element, there are no intervening elements. For example, when a first element is described as being "coupled" 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. Additionally, it will be understood that when an element is referred to as being "between" two elements, it can be the only element between the two elements, or one or more intervening elements may also be present.

[0051] In the drawings, the sizes of various elements, layers, etc. may be exaggerated for clarity of illustration. Unless otherwise noted, like reference numerals designate like elements throughout the drawings and written description, and thus repeated descriptions thereof may not be provided.

[0052] As used herein, the term "and / or" includes any and all combinations of one or more associated listed items. In addition, the use of "may" when describing embodiments of the present disclosure refers to "one or more embodiments of the present disclosure." Unless otherwise apparent from the present disclosure, expressions such as "at least one of," "a plurality of," "one of," and other prepositional phrases when preceding / following a list of elements should be understood to include separate items if written as a connected list, and vice versa. For example, the expression "at least one of a, b, or c," "at least one of a, b, and / or c," "one selected from the group consisting of a, b, and c," "at least one selected from among a, b, and c," "at least one among a, b, and c," "one among a, b, and c," "at least one of a to c" means only a, only b, only c, both a and b, both a and c, both b and c, all of a, b, and c, or variations thereof.

[0053] As used herein, the term "use" may be considered synonymous with the term "utilize."

[0054] As used herein, the terms "substantially," "approximately," and similar terms are used as terms of approximation and not terms of degree, and are intended to take into account the inherent variation in measured or calculated values ​​that one of ordinary skill in the art would recognize. "Substantially," as used herein, is inclusive of the stated value and means within an acceptable range of deviation from the stated value as determined by one of ordinary skill in the art, taking into account the measurement in question and the errors associated with the measurement of the particular quantity (i.e., the limitations of the measurement system). For example, "substantially" can mean within one or more standard deviations, or within ±30%, 20%, 10%, 5% of the stated value.

[0055] 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 spirit and scope of the present disclosure.

[0056] For ease of explanation, spatially relative terms (such as "below," "beneath," "below," "above," "on," etc.) may be used herein to describe the relationship of one element or feature to another element or feature as shown in the figures. It should be understood that spatially relative terms are intended to encompass different orientations of the device in use or operation in addition to the orientation depicted in the drawings. For example, if the device in the drawings is flipped, an element described as being "below" or "beneath" other elements or features would then be oriented as being "above" or "above" the other elements or features. Thus, the example 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 spatially relative descriptors used herein should be interpreted accordingly.

[0057] The terms used herein are for the purpose of describing specific embodiments of the present disclosure and are not intended to limit the present disclosure. As used herein, unless the context clearly indicates otherwise, the singular forms "a", "an" and "the" are intended to also include the plural forms. 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.

[0058] 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 with a minimum value equal to or greater than 1.0 and a maximum value equal to or less than 10.0 (for example, such as 2.4 to 7.6). 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.

[0059] Unless otherwise defined, all terms (including technical and scientific terms) used herein have the same meaning as commonly understood by those skilled in the art to which the present disclosure belongs. It will be further understood that terms such as those defined in commonly used dictionaries should be interpreted as having a meaning consistent with their meaning in the context of the relevant technology and / or this specification, and should not be interpreted in an idealized or overly formal sense unless explicitly defined as such herein.

[0060] 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 variations that are considered low in the art, for example, 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.

[0061] Throughout the specification, unless otherwise stated, each element may be in the singular or in the plural.

[0062] When any element is referred to as being arranged (or located or positioned) “on (or below)” or “on (or below)” 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) above (or below) or on (or below) the component.

[0063] 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 so that the part and the other part are indirectly electrically connected to each other.

[0064] Throughout the 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.

[0065] The terms used in this specification are for describing the embodiments of the present disclosure and are not intended to limit the present disclosure.

[0066] Figure 1 is a perspective view schematically illustrating a configuration of a battery module according to one or more embodiments of the present disclosure.

[0067] refer to Figure 1 A battery module according to one or more embodiments may include a housing (also referred to as a module housing) 10 and a battery cell 20 .

[0068] The outer case 10 may serve as a member that supports the battery cells 20 and protects the battery cells 20 from external impacts and foreign substances.

[0069] The longitudinal direction of the housing 10, which will be described in more detail below, is Figure 1 The direction of the housing 10 may be parallel to the X axis, and the width direction of the housing 10 may be parallel to the X axis. Figure 1 In terms of direction, it can be parallel to the Y axis.

[0070] The housing 10 may include a housing body 11 and a housing cover 12 .

[0071] The housing body 11 may provide a space therein for accommodating the battery cell 20. The housing body 11 according to one or more embodiments may be formed to have a box shape having an empty interior and an open side. Figure 1 In terms of the housing body 11, the opening side can be arranged to face upward. The cross-sectional shape of the housing body 11 is not limited to Figure 1 The quadrilateral is shown, and the design of the cross-sectional shape of the housing body 11 may be changed to one or more suitable shapes, such as a polygonal shape, a circular shape, an elliptical shape, and / or the like.

[0072] The housing cover 12 may be coupled to the housing body 11 and close the interior space of the housing body 11. The housing cover 12 according to one or more embodiments may be formed to have a substantially plate shape (e.g., substantially a plate shape). The housing cover 12 may be arranged to face the open side of the housing body 11, e.g., the upper surface of the housing body 11. The housing cover 12 may be fixed to the housing body 11 using one or more suitable types of coupling methods (e.g., bolting, welding, fitting, and / or the like).

[0073] The battery cell 20 may be used as a unit structure for storing and supplying power in the battery module and may be arranged inside the housing 10 .

[0074] The battery cell 20 may be provided as one or more battery cells 20. Figure 1 An example in which the battery cell 20 is provided as a plurality of battery cells 20 is illustrated, but the battery cell 20 is not limited thereto and may also be provided as a single battery cell 20 .

[0075] When the battery cell 20 is provided as a plurality of battery cells 20, the plurality of battery cells 20 may be arranged in a plurality of columns inside the housing 10. For example, the plurality of battery cells 20 may be arranged in a longitudinal direction (in terms of the longitudinal direction) of the housing 10. Figure 1 However, the arrangement of the plurality of battery cells 20 is not limited thereto, and the plurality of battery cells 20 may be arranged in a plurality of rows in the width direction of the housing 10 (in terms of the X-axis direction). Figure 1 The housing 10 may be arranged in a plurality of columns in the Y-axis direction (in terms of the Y-axis direction), or may be arranged in a plurality of columns in the longitudinal direction and the width direction of the housing 10.

[0076] Hereinafter, an example in which the battery cell 20 is a lithium ion secondary battery and has a prismatic shape will be described. However, the present disclosure is not limited thereto, and the battery cell 20 may be a lithium polymer battery or a cylindrical battery.

[0077] Figure 2 is a schematic diagram illustrating one or more embodiments of the present disclosure. Figure 1 A perspective view of the configuration of the battery cells, Figure 3 is a schematic diagram illustrating one or more embodiments of the present disclosure. Figure 2 A plan view of the configuration of the battery cells, and Figure 4 is a schematic diagram illustrating one or more embodiments of the present disclosure. Figure 2 A cross-sectional view of the configuration of a battery cell.

[0078] refer to Figures 2 to 4, the battery cell 20 according to one or more embodiments of the present disclosure includes an electrode assembly 100 , a cell case 200 , a gas exhaust member 300 , a blocking member 400 , and a guide member 500 .

[0079] The electrode assembly 100 may include a positive electrode 110 , a negative electrode 120 , and a separator 130 disposed between the positive electrode 110 and the negative electrode 120 .

[0080] The positive electrode 110 and the negative electrode 120 may include a coated portion, which is a region where a current collector formed of a thin metal foil is coated with an active material, and uncoated portions 110a and 120a, respectively, which are regions where the current collector is not coated with the active material.

[0081] The electrode assembly 100 may be wound in the form of a core after the separator 130, which is an insulator, is interposed between the positive electrode 110 and the negative electrode 120. However, the electrode assembly 100 is not limited to such a shape and may be formed into a stacked structure in which the positive electrodes 110 and the negative electrodes 120, each made of a plurality of sheets, are alternately stacked with the separator 130 interposed therebetween.

[0082] The electrode assembly 100 may be formed as a single electrode assembly, or may be provided as a plurality of electrode assemblies 100 .

[0083] The cell case 200 may form an overall appearance of the battery cell 20. The cell case 200 may house therein the electrode assembly 100. The cell case 200 may include a conductive metal material such as aluminum, an aluminum alloy, and / or nickel-plated steel.

[0084] The single body case 200 according to one or more embodiments may include a case body 210 and a cover plate 220 .

[0085] The housing body 210 may be formed to have a rectangular parallelepiped shape with one open surface. The open surface of the housing body 210 may be arranged to face upward from the inside of the housing 10 and to face the housing cover 12 vertically.

[0086] The cover plate 220 can be coupled to the housing body 210 and seal the cell housing 200. For example, the cover plate 220 can be formed into a flat plate shape. The cover plate 220 can be arranged on the upper side of the housing body 210 to cover the open side of the housing body 210. The cover plate 220 can be coupled to the housing body 210 using one or more suitable types of coupling methods, such as welding, bolting, fitting, and / or the like.

[0087] The cell housing 200 may further include a cell terminal 230 .

[0088] The cell terminal 230 may be installed to pass through the cover plate 220 and protrude to the outside of the cover plate 220. The outer peripheral surface of the upper column of the cell terminal 230 may be screwed and fixed to the cover plate 220 using a nut. However, the present disclosure is not limited thereto, and the cell terminal 230 may have a rivet structure and be riveted, or may be coupled to the cover plate 220 by welding.

[0089] The cell terminals 230 protruding from the outside of the cap plate 220 may be formed as a pair of cell terminals 230. One of the pair of cell terminals 230 may be connected to the positive electrode 110 of the electrode assembly 100, and the other of the pair of cell terminals 230 may be connected to the negative electrode 120. Accordingly, the pair of cell terminals 230 may serve as the positive and negative terminals of the battery cell 20, respectively.

[0090] For example, the cell terminal 230 may be electrically connected to the first current collector 240 and the second current collector 250 welded to the positive electrode uncoated portion 110a and the negative electrode uncoated portion 120a, respectively. The first current collector 240 and the second current collector 250 may serve as the positive electrode current collector and the negative electrode current collector of the battery cell 20, respectively. More specifically, one of the pair of cell terminals 230 may be coupled to the first current collector 240, and the other of the pair of cell terminals 230 may be coupled to the second current collector 250 by welding. However, the present disclosure is not limited thereto, and the cell terminal 230 and the first current collector 240 and the second current collector 250 may be coupled and formed integrally.

[0091] The cell case 200 may further include a vent hole 221 .

[0092] The exhaust hole 221 may be formed in the shape of a hole that vertically passes through two surfaces (e.g., opposing surfaces) of the cover plate 220. The exhaust hole 221 may serve as a component that provides a path through which flames, gases, smoke, and / or the like formed inside the cell housing 200 are discharged from the battery cell 20 if thermal runaway of the battery cell 20 occurs (e.g., when thermal runaway of the battery cell 20 occurs). The lower side of the exhaust hole 221 may be connected to the internal space of the housing body 210. The upper side of the exhaust hole 221 may be connected to the external space of the cover plate 220. The design of the cross-sectional shape of the exhaust hole 221 may be changed to one or more suitable shapes, such as an elliptical shape, a circular shape, a polygonal shape, and the like.

[0093] The cell case 200 may further include an electrolyte injection port 222 formed through the cap plate 220 and in which a sealing plug can be installed.

[0094] The insulating member may be installed between the electrode assembly 100 and the cap plate 220. The insulating member may include first and second lower insulating members 260 and 270, and each of the first and second lower insulating members 260 and 270 may be installed between the electrode assembly 100 and the cap plate 220.

[0095] One end of a separation member capable of being installed to face one side surface of the electrode assembly 100 may be installed between the insulation member and the cell terminal 230 .

[0096] The separation member may include a first separation member 280 and a second separation member 290 .

[0097] One end of the first and second separation members 280 and 290 , which can be installed to face one side surface of the electrode assembly 100 , may be respectively installed between the first and second lower insulation members 260 and 270 and the pair of cell terminals 230 .

[0098] A pair of cell terminals 230 welded to the first and second current collectors 240 and 250 may be coupled to one end of the first and second lower insulation members 260 and 270 , respectively, and to one end of the first and second separation members 280 and 290 , respectively.

[0099] The vent member 300 may be installed in the vent hole 221 and may be opened or closed in response to changes in the internal pressure of the cell housing 200. For example, during normal operation of the battery cell 20, the vent member 300 may remain in a closed state to seal the vent hole 221. If the internal pressure of the cell housing 200 increases to a set level or more due to overcharging of the battery cell 20, a fire, and / or the like (for example, when the internal pressure of the cell housing 200 increases to a set level or more due to overcharging of the battery cell 20, a fire, and / or the like), the vent member 300 may open and may allow flames, gas, smoke, and / or the like generated from the interior of the cell housing 200 to be discharged to the outside of the cell housing 200.

[0100] Figure 5 is an enlarged view schematically illustrating the configuration of an exhaust member according to one or more embodiments of the present disclosure, and Figure 6 is a schematic diagram illustrating one or more embodiments of the present disclosure. Figure 5 A cross-sectional view of the configuration of the exhaust component.

[0101] refer to Figure 5 and Figure 6 The exhaust member 300 according to one or more embodiments may include an exhaust plate 310 and a cut-off portion 320 .

[0102] The exhaust plate 310 can be fixed to the single body shell 200 and arranged to face the exhaust hole 221. The exhaust plate 310 according to one or more embodiments can be formed to have a substantially plate shape. The exhaust plate 310 can be arranged below the cover plate 220. The upper surface of the exhaust plate 310 can be arranged to face the lower end of the exhaust hole 221 vertically (for example, in the direction from the bottom of the shell body 210 to the cover plate 220). The area of ​​the exhaust plate 310 can be larger than the cross-sectional area of ​​the exhaust hole 221. The upper surface of the exhaust plate 310 can be fixed to the lower surface of the cover plate 220 with one or more suitable types (kinds) of coupling methods (such as welding, bolting, fitting and / or similar methods). The thickness of the exhaust plate 310 can be less than the thickness of the cover plate 220. Accordingly, if the internal pressure of the monolithic shell 200 increases (e.g., when the internal pressure of the monolithic shell 200 increases), the exhaust plate 310 can be easily broken or cut off (e.g., ruptured due to the increased pressure inside the monolithic shell 200 above the set pressure or threshold pressure).

[0103] The cutout portion 320 may be on the exhaust plate 310. The cutout portion 320 may form a portion of the exterior of the exhaust plate 310. When the internal pressure of the cell housing 200 increases to a set pressure or higher, the cutout portion 320 may open the exhaust plate 310 along a cutout line 321.

[0104] Among the entire area of ​​the exhaust plate 310, the cutoff line 321 may be a linear area that is preferentially cut off (e.g., ruptured or broken) if (e.g., when) the internal pressure of the cell case 200 increases to a set pressure or higher (e.g., when the internal pressure of the cell case 200 increases to a set pressure or higher). Figure 5 As shown, the central portion of the cutoff line 321 may have a straight line shape that spans the exhaust plate 310 in the width direction of the housing 10, and both sides (e.g., opposite sides) of the cutoff line 321 may have a shape that branches into a pair of strands (lines) from the end of the central portion of the cutoff line 321. However, the shape of the cutoff line 321 is not limited thereto, and the design of the shape of the cutoff line 321 may be changed to one or more suitable shapes.

[0105] Among the entire area of ​​the exhaust plate 310, the cut-off portion 320 according to one or more embodiments may be a partial area arranged on both sides (e.g., opposite sides) of the cut-off line 321 relative to the cut-off line 321. The cut-off portion 320 may be cut (e.g., ruptured or broken) to both sides (e.g., opposite sides) of the cut-off line 321 by pressure applied from the internal space of the cell housing 200.

[0106] The cut-off portion 320 may protrude convexly from the exhaust plate 310 toward the exhaust hole 221. The cut-off portion 320 may be formed to have a width that narrows toward its upper end (e.g., the upper end of the cut-off portion 320 that protrudes toward or into the exhaust hole 221). The cut-off line 321 may be arranged at the upper end of the cut-off portion 320. Accordingly, if the internal pressure of the cell housing 200 increases (e.g., when the internal pressure of the cell housing 200 increases), the pressure applied from the interior of the cell housing 200 is concentrated on the upper end of the cut-off portion 320 where the cut-off line 321 is arranged, and the cut-off portion 320 may be more easily cut along the cut-off line 321 (e.g., more easily ruptured or broken due to the increased pressure inside the cell housing 200 above the set pressure or threshold pressure). However, the shape of the cut-off portion 320 is not limited thereto, and the cut-off portion 320 may be formed to have a flat plate shape parallel to the exhaust plate 310.

[0107] Exhaust component 300 may further include a notch 322 .

[0108] The notch 322 may be formed in the cut-off portion 320 and may guide the cut-off operation (e.g., rupture or break) of the cut-off portion 320 if the internal pressure of the cell housing 200 increases (e.g., when the internal pressure of the cell housing 200 increases). For example, the notch 322 may serve as a member that guides the cut-off portion 320 to cut (e.g., rupture or break) more easily along the cut-off line 321.

[0109] The notch 322 according to one or more embodiments may be formed in the shape of a groove formed concavely recessed upward from the lower surface of the cutoff portion 320. The notch 322 may be arranged at the upper end portion of the cutoff portion 320 to face the cutoff line 321 vertically. The notch 322 may extend along the cutoff line 321 on the lower surface of the cutoff portion 320. The notch 322 may be formed to have a cross-sectional area that gradually narrows (becomes thinner) toward the cutoff line 321.

[0110] The thickness of the region of the cutout portion 320 where the notch 322 is formed may be smaller than the thickness of the remaining region of the cutout portion 320 where the notch 322 is not formed. Accordingly, if the internal pressure of the cell housing 200 increases (for example, when the internal pressure of the cell housing 200 increases), the notch 322 may guide the cutout portion 320 to be cut more easily along the cutout line 321.

[0111] The blocking member 400 may be installed in the vent hole 221 and cover the vent member 300. The blocking member 400 may serve as a component that blocks flames, gases, smoke, foreign matter, and / or the like generated outside the battery cells 20 from being introduced into the vent hole 221 or coming into direct contact with the vent member 300. Accordingly, if a fire occurs in any one of the battery cells 20 (e.g., when a fire occurs in any one of the battery cells 20), the blocking member 400 may prevent or reduce the possibility of sequential ignition of multiple battery cells 20 due to flames, gases, smoke, and / or the like being introduced into the vent holes 221 of the battery cells 20 adjacent to the battery cell 20 that is releasing flames, gases, smoke, and / or the like.

[0112] The blocking member 400 can be injected into the vent 221 in a liquid state and then solidified into a solid state. Accordingly, regardless of the curvature and cross-sectional shape of the vent 221, the interior space of the vent 221 can be filled with the blocking member 400 without any gaps. The blocking member 400 can be made of a highly heat-resistant material, such as at least one of silicone, epoxy, urethane, and polyurethane.

[0113] The blocking member 400 may be provided as a plurality of blocking members 400. Each blocking member 400 may be individually installed in the vent hole 221 of a different battery cell 20.

[0114] The guide member 500 may be installed in the vent hole 221 and guide the blocking member 400 to open if the vent member 300 is opened (e.g., when the vent member 300 is opened). For example, the guide member 500 may serve as a component that guides the blocking member 400 to open together with the vent member 300 if the vent member 300 is opened due to an increase in the internal pressure of the cell housing 200 (e.g., when the vent member 300 is opened due to an increase in the internal pressure of the cell housing 200). Accordingly, if any one of the battery cells 20 ignites (e.g., when any one of the battery cells 20 ignites), the guide member 500 may prevent or reduce the possibility of chain ignition of the battery cells 20 due to the explosion of the one battery cell 20 by guiding the gas and / or the like generated from the one battery cell 20 to be discharged smoothly.

[0115] The guide member 500 may be provided as a plurality of guide members 500. Each guide member 500 may be individually installed in the vent hole 221 of a different battery cell 20.

[0116] Figure 7 is a perspective view schematically illustrating a configuration of a guide member according to one or more embodiments of the present disclosure, Figure 8 is a schematic diagram illustrating one or more embodiments of the present disclosure. Figure 7A plan view of the configuration of the guide member, Figure 9 is a schematic diagram illustrating one or more embodiments of the present disclosure. Figure 7 A cross-sectional view of the configuration of the guide member, and Figure 10 and Figure 11 is a schematic diagram illustrating the injection of a barrier member into a device including a Figure 7 A perspective view of the process of guiding the exhaust hole of the member.

[0117] refer to Figures 1 to 11 , the guide member 500 according to one or more embodiments may include a guide body 510 .

[0118] The guide body 510 can be arranged inside the blocking member 400. For example, the guide body 510 can be inserted into the exhaust hole 221 before the blocking member 400 is injected into the exhaust hole 221 and positioned on the exhaust member 300. Because the blocking member 400 is injected into the exhaust hole 221 and solidifies, the guide body 510 can be fixed while arranged inside the blocking member 400. For example, if the blocking member 400 solidifies (e.g., when the blocking member 400 is solidified), the guide body 510 can serve as a component that forms a relatively weakened area or a preliminary incision line inside the blocking member 400. Accordingly, if the exhaust member 300 is opened (e.g., when the exhaust member 300 is opened), the blocking member 400 can be easily opened along the boundary area with the guide body 510 due to the pressure of gas and / or the like exhausted from the exhaust member 300.

[0119] The guide body 510 may be formed in a film or sheet shape. The guide body 510 may be made of one or more suitable types (kinds) of materials (such as plastic, synthetic resin, paper material, and / or the like) that can maintain its own shape during the injection process of the blocking member 400 and prevent or reduce the possibility of deformation due to heat.

[0120] The guide body 510 may include a first end portion 511 and a second end portion 512 .

[0121] The first end portion 511 may be a region of the entire region of the guide body 510 that is in direct contact with the exhaust member 300. For example, referring to Figures 7 to 9 , the first end portion 511 may be a region of a lower end portion of the guide body 510 .

[0122] The first end portion 511 may be in contact with the cutting portion 320. More specifically, the first end portion 511 may be arranged to face the cutting line 321 perpendicularly, may extend along the cutting line 321, and may be located on the cutting line 321. For example, the first end portion 511 may be parallel to the cutting line 321. Figure 1The cross-sectional shape of the XY plane may correspond to the cross-sectional shape of the cutoff line 321 parallel to the XY plane. Accordingly, the guide body 510 can match the opening area of ​​the blocking member 400 with the opening area of ​​the exhaust member 300 and ensure that the opening pressure of the exhaust member 300 is uniformly (e.g., substantially uniformly) transmitted across the entire first end portion 511 of the guide body 510.

[0123] Among the upper end portion and the lower end portion of the guide body 510, the second end portion 512 may be arranged opposite to the first end portion 511. For example, referring to Figures 7 to 9 , the second end portion 512 may be an upper end region of the guide body 510 .

[0124] The second end portion 512 may pass through the upper end portion of the blocking member 400 and be exposed to the outside of the blocking member 400. Accordingly, the guide body 510 may pass through the blocking member 400 upward and downward, and if the exhaust member 300 is opened (for example, when the exhaust member 300 is opened), the guide blocking member 400 is more easily opened. The cross-sectional shape of the second end portion 512 parallel to the XY plane may be formed to correspond to the cross-sectional shape of the first end portion 511 parallel to the XY plane.

[0125] In one or more embodiments, the width of the guide body 510 intersecting the extending direction of the cutoff line 321 may be constant. For example, the width of the guide body 510 may remain constant without increasing or decreasing from the second end 512 toward the first end 511.

[0126] The guide body 510 may further include a third end portion 513 .

[0127] The third end portion 513 may be a side end region of the guide body 510 disposed inside the exhaust hole 221 to face the inner surface of the exhaust hole 221. Here, the inner surface of the exhaust hole 221 may be an inner region of the circumferential surface of the cover plate 220 disposed to surround (e.g., encircle) the exhaust hole 221.

[0128] The third end portion 513 may be in contact with the inner surface of the exhaust hole 221. The third end portion 513 may be pressed against the inner surface of the exhaust hole 221, or may be fixed to the inner surface of the exhaust hole 221 by a separate adhesive and / or the like. Accordingly, before the blocking member 400 is injected into the exhaust hole 221, the guide body 510 may stably maintain its upright position on the exhaust member 300.

[0129] The battery module according to one or more embodiments may further include a bus bar holder 30 and a holder vent hole 40 .

[0130] For example, Figure 1 and Figure 12As shown, the bus bar support 30 may be disposed inside the housing 10 and may serve as a member for supporting the bus bar 31 .

[0131] Figure 12 is an enlarged view schematically illustrating the configuration of a bus bar holder and a holder vent hole according to one or more embodiments of the present disclosure.

[0132] refer to Figure 1 and Figure 12 The bus bar support 30 according to one or more embodiments may be formed into a flat plate shape. The upper and lower surfaces of the bus bar support 30 may be arranged to face the housing cover 12 and the upper surface of the battery cell 20 (e.g., the cover plate 220), respectively. The bus bar support 30 may include an electrically insulating polymer composite material.

[0133] The busbars 31 may be electrically connected to the battery cells 20. The busbars 31 may be fixed to the busbar holders 30 using one or more suitable types of coupling methods, such as welding, bolting, fitting, and / or the like. The busbars 31 may contact the cell terminals 230 of the battery cells 20. The busbars 31 may include a conductive material, such as aluminum, nickel, copper, and / or the like, to enable the busbars 31 to be electrically connected to the cell terminals 230.

[0134] The bus bar 31 may be provided as a plurality of bus bars 31. The plurality of bus bars 31 may connect the plurality of battery cells 20 in series or in parallel. The number and arrangement of the plurality of bus bars 31 may be variously changed according to the series and / or parallel connection structure of the battery cells 20.

[0135] The bracket vent holes 40 may serve as a component for providing an exhaust path for gas, flame, smoke, and / or the like exhausted from the battery cells 20 to the bus bar bracket 30. The bracket vent holes 40 according to one or more embodiments may be formed in the shape of a hole that vertically passes through the bus bar bracket 30. The bracket vent holes 40 may be arranged to face the exhaust holes 221 of the battery cells 20.

[0136] The support vent hole 40 may be provided as a plurality of support vent holes 40. The plurality of support vent holes 40 may be arranged along the longitudinal direction of the housing 10. The number of support vent holes 40 may be formed to correspond to the number of battery cells 20. Each support vent hole 40 may be individually arranged to face the vent holes 221 of different battery cells 20.

[0137] The cross-sectional area of ​​the holder vent hole 40 may be smaller than the cross-sectional area of ​​the vent hole 221 of the battery cell 20. Accordingly, the bus bar holder 30 may prevent or reduce the possibility of the blocking member 400 being separated from the vent hole 221 during normal operation of the battery cell 20 by pressing the edge area of ​​the blocking member 400.

[0138] Hereinafter, a battery module according to one or more embodiments of the present disclosure will be described.

[0139] The battery module according to one or more embodiments may be configured as a reference Figures 1 to 12 The described battery modules according to one or more embodiments of the present disclosure differ only in the configuration of the guide member 500 .

[0140] Accordingly, when describing a battery module according to one or more embodiments below, only the detailed configuration of the guide member 500 will be described, which is different from the configuration of the guide member 500 in the battery module according to the above-described embodiments of the present disclosure.

[0141] The description of the battery module according to the above-described embodiments of the present disclosure may be equally applied to the remaining components of the battery module according to the following embodiments.

[0142] Figure 13 is a cross-sectional view schematically illustrating a configuration of a guide member according to one or more embodiments of the present disclosure.

[0143] refer to Figure 13 According to one or more embodiments, the guide body 510 may be formed to have a width that increases from the second end portion 512 toward the first end portion 511. For example, the guide body 510 intersecting the extending direction of the cutoff line 321 may be formed to have a shape in which its width gradually increases toward the exhaust member 300. Accordingly, before the blocking member 400 is injected into the exhaust hole 221, the guide body 510 may more stably maintain its upright position on the exhaust member 300.

[0144] Hereinafter, a battery module according to one or more embodiments of the present disclosure will be described.

[0145] The battery module according to one or more embodiments may be configured as a reference Figures 1 to 12 The battery modules according to the above-described embodiments of the present disclosure are described as being different only in the connection relationship between the exhaust member 300 and the guide member 500 .

[0146] Accordingly, when describing the battery module according to one or more embodiments below, only the connection relationship between the exhaust member 300 and the guide member 500 will be described, which is different from the connection relationship in the battery module according to the above-described embodiments of the present disclosure.

[0147] The description of the battery module according to the above-described embodiments of the present disclosure may be equally applied to the remaining components of the battery module according to the following embodiments.

[0148] Figure 14is a cross-sectional view schematically illustrating a configuration of a guide member according to one or more embodiments of the present disclosure.

[0149] Figure 14 An example is illustrated in which the width of the guide body 510 is kept constant from the second end portion 512 toward the first end portion 511, but the guide body 510 is not limited thereto, and the width of the guide body 510 may be as follows. Figure 13 As shown, it increases from the second end 512 toward the first end 511 .

[0150] refer to Figure 14 According to one or more embodiments, the notch 322 may be formed concavely downward from the upper surface of the cutoff portion 320. For example, the notch 322 may be disposed on the upper side of the cutoff line 321 and vertically facing the first end 511 of the guide body 510.

[0151] The first end portion 511 of the guide body 510 can be inserted into the recess 322. Accordingly, the guide body 510 can more stably maintain its upright position on the exhaust member 300 before the blocking member 400 is injected into the guide body 510. The width of the upper end portion of the recess 322 can be greater than the width of the first end portion 511, so that the first end portion 511 can be inserted more smoothly.

[0152] Hereinafter, a battery module according to one or more embodiments of the present disclosure will be described.

[0153] The battery module according to one or more embodiments may be configured to be different from the battery module according to the above-described embodiments of the present disclosure only in the configuration of the guide member 500 .

[0154] Accordingly, when describing a battery module according to one or more embodiments below, only the configuration of the guide member 500 will be described, which is different from the configuration of the guide member 500 in the battery module according to the above-described embodiments of the present disclosure.

[0155] Figure 15 is a perspective view schematically illustrating a configuration of a guide member according to one or more embodiments of the present disclosure, and Figure 16 is a schematic illustration of a barrier member according to one or more embodiments of the present disclosure being injected into a Figure 15 A view of the state of the exhaust hole of the guide member.

[0156] refer to Figure 15 and Figure 16 , the guide member 500 according to one or more embodiments may further include dispersion holes 520 .

[0157] The dispersion hole 520 may serve as a part for dispersing the blocking member 400 injected into the exhaust hole 221 in a liquid state throughout the exhaust hole 221 .

[0158] The dispersion holes 520 according to one or more embodiments may be formed in the shape of a hole formed through the guide body 510. The dispersion holes 520 may pass through the guide body 510 in a width direction of the guide body 510 intersecting with the extending direction of the cutoff line 321. Accordingly, in the process of injecting the blocking member 400 into the exhaust hole 221, the blocking member 400 may be uniformly (e.g., substantially uniformly) dispersed into different inner spaces of the exhaust hole 221 separated by the guide body 510 through the dispersion holes 520.

[0159] The dispersion holes 520 may be provided as a plurality of dispersion holes 520. The plurality of dispersion holes 520 may be arranged to be spaced apart and / or separated (eg, spaced apart or separated) from each other in the extending direction of the guide body 510. Figure 15 As shown, the plurality of dispersion holes 520 may be individually arranged in the third end portion 513 of the guide body 510 and the central portion of the guide body 510. The number, cross-sectional shape, position and / or the like of the dispersion holes 520 are not limited to Figure 15 those shown, and the design of the number, cross-sectional shape, position and / or the like of the dispersion holes 520 may be variously changed according to the size and shape of the guide body 510.

[0160] Hereinafter, a battery module according to one or more embodiments of the present disclosure will be described.

[0161] The battery module according to one or more embodiments may be configured to be different from the battery module according to the above-described embodiments of the present disclosure only in the configuration of the guide member 500 .

[0162] Accordingly, when describing a battery module according to one or more embodiments below, only the configuration of the guide member 500 will be described, which is different from the configuration of the guide member 500 in the battery module according to the above-described embodiments of the present disclosure.

[0163] Figure 17 is a perspective view schematically illustrating a configuration of a guide member according to one or more embodiments of the present disclosure, Figure 18 is a schematic diagram illustrating one or more embodiments of the present disclosure. Figure 17 A cross-sectional view of the configuration of the guide member, Figure 19 and Figure 20 is a schematic diagram illustrating the injection of a barrier member into a device including a Figure 17 A view of the process of guiding the exhaust hole of the member, and Figure 21is a view schematically illustrating a state in which a guide member is separated from a blocking member according to one or more embodiments of the present disclosure.

[0164] Figures 17 to 21 An example in which the guide member 500 includes the dispersion holes 520 is illustrated, but the guide member 500 is not limited thereto, and the guide member 500 may be configured not to include the dispersion holes 520 .

[0165] refer to Figures 17 to 21 , the guide member 500 according to one or more embodiments can be separated from the blocking member 400 after the blocking member 400 is solidified. Therefore, a cutting groove as large as the width of the guide member 500 can be formed in the blocking member 400, and thus if the exhaust member 300 is opened (for example, when the exhaust member 300 is opened), the blocking member 400 can be opened more easily based on the cutting groove.

[0166] In order to easily separate the guide member 500, the guide body 510 according to one or more embodiments may be formed to have a width that decreases from the second end 512 toward the first end 511. For example, the width of the guide body 510 intersecting the extending direction of the cutoff line 321 may gradually decrease toward the exhaust member 300.

[0167] The guide member 500 according to one or more embodiments may further include a gripping portion 530 .

[0168] The gripping portion 530 may serve as a portion gripped by a user during a process of separating the guide member 500 from the blocking member 400. Accordingly, the gripping portion 530 may allow for further improvement in efficiency of the separation operation of the guide member 500.

[0169] The gripping portion 530 according to one or more embodiments may extend from the second end portion 512 of the guide body 510 exposed to the outside of the blocking member 400. The gripping portion 530 may protrude toward the outside of the blocking member 400 by a set or predetermined distance or more. The shape of the gripping portion 530 is not limited to Figures 17 to 21 The shape shown in , and the shape design of the gripping portion 530 can be changed to one or more suitable shapes that can be gripped by the user. A protrusion or other feature having an uneven shape to increase friction can be formed on the surface of the gripping portion 530 to prevent or reduce sliding.

[0170] According to the present disclosure, if a fire occurs in any one of the battery cells (for example, when a fire occurs in any one of the battery cells), the possibility that multiple battery cells will be sequentially ignited due to flames, gases, smoke and / or the like introduced into the exhaust holes of the battery cells adjacent to the burning battery cell can be prevented or reduced by using a blocking member covering the exhaust plate.

[0171] According to the present disclosure, since a blocking member is installed separately for each battery cell, if thermal runaway of any one battery cell occurs (for example, when thermal runaway of any one battery cell occurs), the possibility that the blocking members installed in other battery cells (other than the ignited battery cell) will rise can be prevented or reduced.

[0172] According to the present disclosure, if any one of the battery cells ignites (e.g., when any one of the battery cells ignites), the possibility of the exhaust performance of the battery cell being lost due to the blocking member can be prevented or reduced by using the guide member to guide the gas and / or the like generated from the ignited battery cell to be smoothly discharged.

[0173] According to the embodiment of the present disclosure, since the cross-sectional shape of the guide body is formed to correspond to the cross-sectional shape of the cutoff line, the opening area of ​​the blocking member can be matched with the opening area of ​​the exhaust member.

[0174] According to the present disclosure, the guide body can stably maintain its upright position inside the exhaust hole through its own cross-sectional shape, the notch, or the third end.

[0175] However, the effects obtainable by the present disclosure are not limited to the above effects, and those skilled in the art will understand other technical effects not mentioned from the above description of the present disclosure.

[0176] The portable devices, vehicles and / or batteries (e.g., battery controllers and / or any other related devices or components) according to the embodiments of the present disclosure described herein can be implemented using any suitable hardware, firmware (e.g., application specific integrated circuits), software, or a combination of software, firmware, and hardware. For example, the various components of the device can be formed on a single integrated circuit (IC) chip or on separate IC chips. In addition, the various components of the device can be implemented on a flexible printed circuit film, a tape carrier package (TCP), a printed circuit board (PCB), or formed on a substrate. In addition, the various components of the device can be processes or threads running on one or more processors in one or more computing devices, executing computer program instructions and interacting with other system components to perform the various functions described herein. The computer program instructions are stored in a memory, which can be implemented in the computing device using a standard storage device (e.g., random access memory (RAM)). The computer program instructions can also be stored in other non-transitory computer-readable media (such as, for example, a CD-ROM, a flash drive, etc.). Moreover, those skilled in the art will appreciate that, without departing from the scope of the embodiments of the present disclosure, the functions of the various computing devices can be combined or integrated in a single computing device, or the functions of a particular computing device can be distributed across one or more other computing devices.

[0177] It will be understood that, unless otherwise described, the description of features or aspects in each embodiment should generally be considered applicable to other similar features or aspects in other embodiments. Therefore, as will be apparent to one of ordinary skill in the art, unless expressly indicated otherwise, features, characteristics, and / or elements described in conjunction with a particular embodiment may be used alone or in combination with features, characteristics, and / or elements described in conjunction with other embodiments. It will be understood that the foregoing is illustrative of various exemplary embodiments and should not be construed as limiting the specific embodiments disclosed herein, and that various modifications of the disclosed embodiments as well as other exemplary embodiments are intended to be included within the spirit and scope of the present disclosure as defined in the appended claims and their equivalents.

Claims

1. A battery cell, comprising: electrode assembly; A single body shell, accommodating the electrode assembly, wherein the single body shell has a vent hole; a vent member that seals the vent hole and opens if the internal pressure of the cell case increases; a blocking member installed in the exhaust hole and covering the exhaust member; as well as A guide member is installed in the exhaust hole and guides the blocking member to open if the exhaust member is opened. 2 . The battery cell according to claim 1 , wherein the guide member includes a guide body disposed inside the blocking member and having a first end in contact with the venting member and a second end opposite to the first end. 3 . The battery cell according to claim 2 , wherein a width of the guide body increases from the second end portion toward the first end portion. 4 . The battery cell according to claim 2 , wherein the second end portion is exposed to the outside of the blocking member.

5. The battery cell according to claim 2, wherein the vent member comprises: an exhaust plate fixed to the single body shell and facing the exhaust hole; and a cut-off portion on the exhaust plate and including a cut-off line that is cut off if the internal pressure of the single body case increases, and The first end portion is in contact with the cut portion. 6 . The battery cell according to claim 5 , wherein the first end portion faces the cutoff line and extends along the cutoff line. 7 . The battery cell according to claim 5 , wherein the venting member further comprises a notch recessed into the cut-off portion in a concave shape and extending along the cut-off line. The battery cell according to claim 7 , wherein the first end portion is inserted into the recess. 9 . The battery cell according to claim 2 , wherein the guide body further includes a third end portion contacting an inner surface of the vent hole. 10 . The battery cell according to claim 2 , wherein the blocking member is injected into the vent hole in a liquid state and then solidified. 11 . The battery cell according to claim 10 , wherein the barrier member comprises at least one of silicone, epoxy, urethane, and polyurethane. 12 . The battery cell according to claim 10 , wherein the guide member further comprises dispersion holes passing through the guide body. 13 . The battery cell according to claim 12 , wherein the dispersion hole is provided as a plurality of dispersion holes, and the plurality of dispersion holes are spaced apart from each other in an extending direction of the guide body. 14 . The battery cell according to claim 10 , wherein the guide member is separated from the blocking member after the blocking member is cured. 15 . The battery cell according to claim 14 , wherein a width of the guide body decreases from the second end portion toward the first end portion. 16 . The battery cell according to claim 14 , wherein the guide member further comprises a gripping portion extending from the second end portion and protruding to the outside of the blocking member.

17. A battery module comprising: Module housing; as well as One or more battery cells, inside the module housing, Each of the battery cells is a battery cell according to any one of claims 1 to 16.

18. The battery module according to claim 17, further comprising: a bus bar support inside the module housing and supporting a bus bar connected to the battery cell; and The bracket vent hole passes through the bus bar bracket and faces the vent hole of the battery cell. 19 . The battery module according to claim 18 , wherein a cross-sectional area of ​​the vent hole of the bracket is smaller than a cross-sectional area of ​​the vent hole of the battery cell.

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