Battery module

Abstract

A battery module includes: a housing; a plurality of battery cells arranged in the housing along a first direction; a plurality of cell busbars connected to the plurality of battery cells; a bracket disposed on the plurality of battery cells and supporting the plurality of cell busbars; a module busbar including an extension portion connected to the cell busbars and disposed on the bracket; and an adhesive member securing the extension portion to the bracket. According to one or more embodiments of this disclosure, separation of the module busbars due to overvoltage that may occur during thermal runaway of the battery cells can be prevented or substantially prevented, and short circuits between the module busbars and the housing can be prevented or substantially prevented.

Description

Technical Field

[0001] An aspect of the embodiments of this disclosure relates to a battery module. Background Technology

[0002] Generally speaking, due to the recent surge in battery-powered electronic devices such as mobile phones, laptops, and electric vehicles, the demand for rechargeable batteries with high energy density and high capacity has increased rapidly. Accordingly, research and development to improve the performance of lithium-ion rechargeable batteries are actively underway.

[0003] A lithium secondary battery is a battery that includes a positive electrode and a negative electrode containing active materials capable of inserting and deintercalating lithium ions, as well as an electrolyte solution, and generates energy through oxidation / reduction reactions when lithium ions are inserted / deintercalated at the positive and negative electrodes.

[0004] Lithium secondary batteries can be used in the form of battery packs that include multiple battery cells connected in series and / or parallel and a battery management system (BMS) that controls the charging and discharging of the multiple battery cells.

[0005] The information disclosed above in the art that forms the background of this disclosure is provided to enhance the understanding of the background of this disclosure, and may therefore include information that does not constitute related art. Summary of the Invention

[0006] According to an embodiment of the present disclosure, a battery module capable of strengthening the fixing force on the module busbar is provided.

[0007] The above and other aspects and features of this disclosure will be described in, or will be apparent from, the following description of some embodiments of this disclosure.

[0008] According to one or more embodiments of the present disclosure, a battery module includes: a housing; a plurality of battery cells arranged in the housing along a first direction; a plurality of cell busbars connected to the plurality of battery cells; a bracket arranged on the plurality of battery cells and supporting the plurality of cell busbars; a module busbar including an extension portion connected to the cell busbars and arranged on the bracket; and an adhesive member for securing the extension portion to the bracket.

[0009] The extension portion can be arranged parallel to the first direction.

[0010] The adhesive component may include a first adhesive component between the support and the extension portion.

[0011] The bracket may include a bracket bonding hole between the battery cell and the extension portion, and the bonding member may further include: a second bonding member between the battery cell and the bracket; and a connecting portion in the bracket bonding hole and connected to the first bonding member and the second bonding member.

[0012] The first adhesive member can be formed by being introduced between the bracket and the extension through the bracket adhesive hole when the bracket is pressed toward the battery cell.

[0013] The cross-sectional area of ​​the first adhesive component may be larger than the cross-sectional area of ​​the connecting portion.

[0014] The bracket bonding holes may include a plurality of bracket bonding holes spaced apart from each other between the battery cell and the module busbar.

[0015] Each of the plurality of battery cells may include: an exhaust member facing the bracket; and a terminal spaced apart from the exhaust member and connected to a corresponding battery busbar in the plurality of battery cell busbars, and the second adhesive member may be located between the exhaust member and the terminal.

[0016] The bracket may further include: a first bracket surface facing the battery cell; a second bracket surface opposite to the first bracket surface; and a groove spaced apart from the bracket bonding hole and recessed from the first bracket surface toward the second bracket surface.

[0017] The exhaust element and the terminal may be spaced apart along a second direction intersecting the first direction, and the groove may include a first groove and a second groove, which are spaced apart along the second direction and located on opposite sides of the bracket bonding hole, respectively.

[0018] The interval between the first slot and the second slot can be smaller than the interval between the terminal and the exhaust component.

[0019] The first slot and the second slot can pass through the surface of the second bracket.

[0020] The interval between the first groove and the second groove may be less than the width of the extension in the second direction.

[0021] The module busbar may include a busbar adhesive hole passing through the extension portion, and the adhesive member may further include a third adhesive member extending from the first adhesive member and located in the busbar adhesive hole.

[0022] The busbar bonding holes may include a plurality of busbar bonding holes spaced apart from each other in the extension portion.

[0023] The bonding hole of the busbar can be offset from the bonding hole of the bracket.

[0024] The extension portion may include a first surface facing the bracket and a second surface opposite to the first surface. The manifold adhesive hole may include: a first through portion passing through the first surface; and a second through portion passing through the second surface and connected to the first through portion, wherein the cross-sectional area of ​​the second through portion may be greater than the cross-sectional area of ​​the first through portion.

[0025] The busbar bonding hole can be formed recessed from the side surface of the extension portion.

[0026] The battery module may further include ribs extending from the bracket and facing the side surface of the extension.

[0027] The rib can contact the side surface of the extension. Attached Figure Description

[0028] The accompanying drawings included in 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, this disclosure should not be construed as limited to the drawings.

[0029] Figure 1 This is a perspective view schematically illustrating the configuration of a battery module according to an embodiment of the present disclosure;

[0030] Figure 2 It is shown schematically. Figure 1 An exploded perspective view of the battery module configuration;

[0031] Figure 3 This is a perspective view schematically illustrating the configuration of a battery cell according to an embodiment of the present disclosure;

[0032] Figure 4 It is shown schematically. Figure 3 A cross-sectional view of the configuration of a single battery cell;

[0033] Figure 5 This is a view schematically illustrating the configuration of an electrode assembly according to an embodiment of the present disclosure;

[0034] Figure 6 This is a view schematically illustrating the configuration of the adhesive member according to an embodiment of the present disclosure;

[0035] Figure 7 This is a schematic cross-sectional view illustrating the configuration of a battery module according to another embodiment of the present disclosure;

[0036] Figure 8 It is shown schematically. Figure 7 An exploded perspective view of the battery module configuration;

[0037] Figures 9 to 11 It schematically shows the formation Figure 7 A view of the process of bonding components for the battery module;

[0038] Figure 12 This is a schematic cross-sectional view illustrating the configuration of a battery module according to another embodiment of the present disclosure;

[0039] Figures 13 to 15 It schematically shows the formation Figure 12 A view of the process of bonding components for the battery module;

[0040] Figure 16 This is a perspective view schematically illustrating the configuration of a battery module according to another embodiment of the present disclosure;

[0041] Figure 17 It is shown schematically. Figure 16 An exploded perspective view of the battery module configuration;

[0042] Figure 18 It is shown schematically. Figure 16 A cross-sectional view of the battery module configuration;

[0043] Figure 19 It is shown schematically. Figure 16 An enlarged view of the configuration of the busbar bonding holes in the battery module;

[0044] Figure 20 and Figure 21 It schematically shows the formation Figure 16 A view of the process of the third adhesive component of the battery module;

[0045] Figure 22 This is a perspective view schematically illustrating the configuration of a battery module according to another embodiment of the present disclosure;

[0046] Figure 23 It is shown schematically. Figure 22 An exploded perspective view of the battery module configuration;

[0047] Figure 24 It is shown schematically. Figure 22 A cross-sectional view of the battery module configuration;

[0048] Figure 25 It is shown schematically. Figure 22 An enlarged view of the rib configuration of the battery module; and

[0049] Figure 26 and Figure 27 It schematically shows the formation Figure 22 A view of the process of the third adhesive component of the battery module. Detailed Implementation

[0050] In this document, 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 construed as limited to their common or dictionary meanings, but should be interpreted as having meanings and concepts consistent with the technical spirit of the present disclosure, based on the principle that the inventor is capable of being his / her own lexicographer to appropriately define the concepts of the terms.

[0051] The embodiments described in this specification and the configurations shown in the accompanying drawings are provided as some exemplary embodiments of this disclosure and do not necessarily represent all technical ideas, aspects, and features of this disclosure. Accordingly, it should be understood that various equivalents and modifications may exist to replace or modify the embodiments described herein at the time of filing this application.

[0052] It should be understood that when an element or layer is referred to as being "on," "connected to," or "linked to" another element or layer, it can be directly on, directly connected to, or directly linked to the other element or layer, or one or more intermediary elements or layers may be present. When an element or layer is referred to as being "directly on," "directly connected to," or "directly linked to" another element or layer, no intermediary element or layer is present. For example, when a first element is described as being "linked" or "connected" to a second element, the first element can be directly linked to or connected to the second element, or the first element can be indirectly linked to or connected to the second element via one or more intermediary elements.

[0053] In the figures, the dimensions of various elements, layers, etc., may be exaggerated for clarity of illustration. The same reference numerals indicate the same or similar elements. As used herein, the term “and / or” includes any and all combinations of one or more of the associated listed items. Furthermore, the use of “may” in describing embodiments of this disclosure refers to “one or more embodiments of this disclosure.” Expressions such as “at least one of…” and “any one of…” modify the entire list of elements when following it, not individual elements in the list. When phrases such as “at least one of A, B, and C,” “at least one of A, B, or C,” “at least one selected from the group of A, B, and C,” or “at least one selected from A, B, and C” are used to indicate a 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 term “use” may be considered synonymous with the term “utilize.” As used herein, the terms “substantially,” “about,” and similar terms are used as approximate terms rather than as terms of degree, and are intended to take into account the inherent variations in the measured or calculated values ​​that would be recognized by one of ordinary skill in the art.

[0054] 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 segments, these elements, components, regions, layers, and / or segments should not be limited by these terms. These terms are used to distinguish one element, component, region, layer, or segment from another element, component, region, layer, or segment. Therefore, without departing from the teachings of the exemplary embodiments, the first element, component, region, layer, or segment discussed below may be referred to as the second element, component, region, layer, or segment.

[0055] For ease of description, spatial relative terms such as “below,” “under,” “down,” “above,” and “above” are used herein to describe the relationship between one element or feature and another element or feature as shown in the figure. It should be understood that spatial relative terms are intended to cover different orientations of the device in use or operation other than the orientation depicted in the figure. For example, if the device in the figure is flipped, an element described as “below” or “under” other elements or features would then be oriented as “above” or “above” other elements or features. Therefore, the term “below” can encompass both above and below orientations. The device may be oriented in other ways (e.g., rotated 90 degrees or in other orientations), and the spatial relative descriptive terms used herein should be interpreted accordingly.

[0056] The terminology used herein is for the purpose of describing embodiments of this disclosure and is not intended to limit this disclosure. As used herein, the singular form “a” is intended to include the plural form as well, unless the context clearly indicates otherwise. It should be further understood that the terms “comprising” and / or “including” as used in this specification specify the presence of the stated features, integers, steps, operations, elements, and / or components, but do not exclude the presence or addition of one or more other features, integers, steps, operations, elements, components, and / or groups thereof.

[0057] Furthermore, any numerical range disclosed and / or described herein is intended to include all subranges with the same numerical precision contained within the described range. For example, the range “1.0 to 10.0” is intended to include all subranges between (and including) the described minimum value of 1.0 and the described maximum value of 10.0, i.e., a minimum value equal to or greater than 1.0 and a maximum value equal to or less than 10.0, such as 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 herein 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 describe any subranges contained within the scope explicitly described herein.

[0058] Referring to two compared elements, features, etc., as “identical” can mean that they are identical or substantially identical. Therefore, the phrase “identical” or “substantially identical” can include cases with a deviation considered low in the art (e.g., 5% or less). Furthermore, when a parameter is said to be consistent in a given region, it can mean that it is consistent in terms of average value.

[0059] Throughout this specification, unless otherwise stated, each element may be singular or plural.

[0060] When any element is referred to as being arranged (or located or positioned) "above (or below)" or "on (or below)" a component, it may mean that the element is placed in contact with the upper (or lower) surface of the component, and may also mean that another component may be located between the component and any element arranged (or located or positioned) on (or below) the component.

[0061] Furthermore, it should be understood that when an element is referred to as "connected," "linked," or "attached" to another element, these elements may be directly "connected," "linked," or "attached" to each other, or one or more intermediary elements may exist between them, through which the element may be "connected," "linked," or "attached" to the other element. Furthermore, when a part is referred to as "electrically connected" to another part, the part may be directly electrically connected to the other part, or one or more intermediary elements may exist between them, allowing the part to be indirectly electrically connected to the other part.

[0062] Throughout this specification, unless otherwise stated, the phrase "A and / or B" means A, B, or A and B. That is, "and / or" includes any one or all of the listed items. Unless otherwise stated, the phrase "C to D" means C and below D.

[0063] The terminology used in this specification is for describing embodiments of this disclosure and is not intended to limit this disclosure.

[0064] Figure 1 This is a perspective view schematically illustrating the configuration of a battery module according to an embodiment of the present disclosure; and Figure 2 It is shown schematically. Figure 1 An exploded perspective view of the battery module configuration.

[0065] refer to Figure 1 and Figure 2 According to the embodiments, the battery module may include a housing 100, a battery cell 200, a cell busbar 300, a bracket 400, a module busbar 500, and an adhesive member 600.

[0066] The housing 100 forms the overall exterior of the battery module and provides space to accommodate the individual battery cells 200. The housing 100 protects the individual battery cells 200 from external impacts and foreign objects.

[0067] The housing 100 may include the housing body 110.

[0068] The outer casing 110 can be formed in a box shape, having an empty interior and open sides. For example, relative to Figure 1 The open side of the housing body 110 can be perpendicular to a third direction (e.g., the Z direction) and can face upwards. However, the cross-sectional shape of the housing body 110 is not limited to... Figure 1 The shape shown can be any shape, such as a polygon, a circle, an ellipse, etc.

[0069] The housing 100 according to an embodiment may further include a housing cover 120.

[0070] The housing cover 120 can be attached to the housing body 110 and can close the internal space of the housing body 110. For example, the housing cover 120 can be formed to have a generally plate shape. The housing cover 120 can be positioned to face the upper surface of the housing body 110 along a third direction. The housing cover 120 can be secured to the upper portion of the housing body 110 by any of various types of connection methods such as bolting, welding, mating, etc.

[0071] The battery cell 200 can be used as a unit structure for storing and supplying power in a battery module. Multiple battery cells 200 can be provided. The multiple battery cells 200 can be arranged along a first direction (e.g., the X direction). However, the arrangement of the multiple battery cells 200 is not limited to this, and the multiple battery cells 200 can be arranged in multiple rows along a second direction (e.g., the Y direction), or they can be arranged in multiple rows along both the first and second directions.

[0072] In this document, examples of battery cell 200, such as prismatic batteries and lithium-ion secondary batteries, will be described. However, this disclosure is not limited thereto; for example, battery cell 200 may be a lithium polymer battery or a cylindrical battery.

[0073] Figure 3 This is a perspective view schematically illustrating the configuration of a battery cell according to an embodiment of the present disclosure; and Figure 4 It is shown schematically. Figure 3 A cross-sectional view of the configuration of a single battery cell.

[0074] refer to Figures 1 to 4 According to an embodiment, the battery cell 200 includes an electrode assembly 210, a housing 220, a cover plate 230, a terminal 240, and an exhaust vent 250.

[0075] The electrode assembly 210 can be used as a unit structure for performing electrical charging and discharging operations in the battery cell 200. The electrode assembly 210 can be housed in the housing 220.

[0076] Figure 5 This is a view schematically illustrating the configuration of an electrode assembly according to an embodiment of the present disclosure.

[0077] refer to Figures 1 to 5 The electrode assembly 210 according to the embodiment may include a first electrode 211, a second electrode 212 and a diaphragm 213.

[0078] In this document, an example of an electrode assembly 210 being formed as a stacked type in which a plurality of first electrodes 211, a plurality of second electrodes 212, and a plurality of diaphragms 213 are alternately stacked along a first direction will be described. However, the electrode assembly 210 is not limited to this, and may, for example, be formed as an electrode core type wound around a winding axis in a state in which the first electrodes 211, second electrodes 212, and diaphragms 213 are stacked in sequence.

[0079] In one embodiment, the first electrode 211 can be used as the positive electrode of the electrode assembly 210.

[0080] The first electrode 211 according to the embodiment can be formed in a foil shape and comprise a metallic material (such as aluminum or an aluminum alloy). The two surfaces or opposite surfaces of the first electrode 211 can be arranged perpendicular to the first direction. The type, size, shape, etc., of the first electrode 211 are not particularly limited, as long as it is conductive and does not cause chemical changes in the secondary battery. The shape of the first electrode 211 can be any shape other than a rectangular shape.

[0081] Multiple first electrodes 211 can be provided. The multiple first electrodes 211 can be arranged along a first direction. The number of first electrodes 211 can vary depending on the charging capacity of the battery cell 200, etc.

[0082] The first electrode 211 may include a first active material layer 211a.

[0083] The first active material layer 211a may be provided in the form of being applied to at least a portion of the first electrode 211. The first active material layer 211a may be applied to both surfaces or opposite surfaces of the first electrode 211, or it may be applied to only one surface of the first electrode 211.

[0084] In one embodiment, the first electrode 211 is used as a positive electrode, and the first active material layer 211a may include a positive electrode active material.

[0085] The positive electrode active material can be a compound capable of reversibly inserting and deintercalating lithium (lithiation intercalation compound). In one embodiment, one or more composite oxides of a metal selected from the group consisting of cobalt, manganese, nickel, iron, and combinations thereof with lithium can be used as the positive electrode active material.

[0086] As an example, the positive electrode active material may include lithium iron phosphate oxide (LiFePO4, LFP), lithium manganese iron phosphate oxide (LiMnFePO4, LMFP), and lithium nickel cobalt manganese oxide (LiNi). x Co y Mn zat least one of O2, NCM). Here, 0 < x < 1, 0 < y < 1, 0 < z < 1, and x + y + z = 1 can be satisfied. The positive electrode active material may include lithium iron phosphate oxide (LiFePO4, LFP), lithium manganese iron phosphate oxide (LiMnFePO4, LMFP), and lithium nickel cobalt manganese oxide (LiNi x Co y Mn z O2, NCM), or may include two or all of lithium iron phosphate oxide (LiFePO4, LFP), lithium manganese iron phosphate oxide (LiMnFePO4, LMFP), and lithium nickel cobalt manganese oxide (LiNixCoyMnzO2, NCM).

[0087] The first active material layer 211a may further include a positive electrode conductive material.

[0088] The positive electrode conductive material imparts conductivity to the first active material layer 211a, and any suitable conductive material that does not cause a chemical change may be used. Examples of the positive electrode conductive material may include carbon-based materials (such as natural graphite, artificial graphite, carbon black, acetylene black, Ketjen black, carbon fiber, carbon nanofiber, and carbon nanotube), metal-based materials in the form of metal powders or metal fibers containing copper, nickel, aluminum, silver, etc., conductive polymers (such as polyphenylene derivatives, etc.), or mixtures thereof.

[0089] The first active material layer 211a may further include a positive electrode binder.

[0090] The positive electrode binder is used to well attach the particles constituting the positive electrode active material to each other and also well attach the positive electrode active material to the first electrode 211.

[0091] Examples of the positive electrode binder may include non-aqueous binders, aqueous binders, dry binders, or combinations thereof.

[0092] Non-aqueous binders may include polyvinyl chloride, carboxylated polyvinyl chloride, polyvinyl fluoride, ethylene propylene copolymer, polystyrene, polyurethane, polytetrafluoroethylene, polyvinylidene fluoride, polyethylene, polypropylene, polyamideimide, polyimide, or combinations thereof.

[0093] Aqueous binders may be selected from styrene-butadiene rubber, (meth)acrylate-modified styrene-butadiene rubber, (meth)acrylonitrile-butadiene rubber, (meth)acrylic rubber, butyl rubber, fluoroelastomer, polyethylene oxide, polyvinylpyrrolidone, epichlorohydrin, polyphosphazene, poly(meth)acrylonitrile, ethylene propylene diene copolymer, polyvinylpyridine, chlorosulfonated polyethylene, latex, polyester resin, (meth)acrylic resin, phenolic resin, epoxy resin, polyvinyl alcohol, and combinations thereof.

[0094] If an aqueous binder is used as the positive electrode binder, the aqueous binder may further include a cellulose compound capable of imparting viscosity. As a cellulose compound, one or more of carboxymethyl cellulose, hydroxypropyl methyl cellulose, methyl cellulose, and their alkali metal salts may be mixed and used. In one embodiment, the alkali metal may be Na, K, or Li.

[0095] Dry adhesives can be fibrous polymeric materials, such as polytetrafluoroethylene, polyvinylidene fluoride, polyvinylidene fluoride-hexafluoropropylene copolymer, polyethylene oxide, or combinations thereof.

[0096] The first electrode 211 may include a first uncoated portion 211b to which the first active material layer 211a is not coated. According to an embodiment, the first uncoated portion 211b may be located at the end region of the first electrode 211 facing the second direction. However, the first uncoated portion 211b is not limited to this form, and in one embodiment, it may be formed over the entire edge region of the first electrode 211.

[0097] In one embodiment, the second electrode 212 can be used as the negative electrode of the electrode assembly 210.

[0098] The second electrode 212 according to the embodiment can be formed in a foil shape and comprise a metallic material (such as copper, copper alloy, nickel, or nickel alloy). The two surfaces or opposite surfaces of the second electrode 212 can be arranged perpendicular to the first direction. The type, size, shape, etc., of the second electrode 212 are not particularly limited, as long as it is conductive and does not cause chemical changes in the secondary battery. The shape of the second electrode 212 can be, except... Figure 5 Any shape other than the rectangle shape shown.

[0099] Multiple second electrodes 212 may be provided. The multiple second electrodes 212 may be arranged along a first direction. The multiple first electrodes 211 and second electrodes 212 may be alternately arranged along the first direction.

[0100] The second electrode 212 may include a second active material layer 212a and a second uncoated portion 212b.

[0101] The second active material layer 212a may be provided in the form of being applied to at least a portion of the second electrode 212. The second active material layer 212a may be applied to both surfaces or opposite surfaces of the second electrode 212, or it may be applied to only one surface of the second electrode 212.

[0102] In one embodiment, the second electrode 212 is used as a negative electrode, and the second active material layer 212a may include a negative electrode active material.

[0103] The negative electrode active material may include materials capable of reversibly inserting / deintercalating lithium ions, lithium metal, lithium metal alloys, materials capable of doping and dedoping lithium, or transition metal oxides.

[0104] Materials capable of reversibly inserting / deintercalating lithium ions can be carbon-based negative electrode active materials, which may include, for example, crystalline carbon, amorphous carbon, or combinations thereof. Examples of crystalline carbon may include graphite, such as amorphous, plate-shaped, sheet-shaped, spherical, or fibrous natural or artificial graphite, and examples of amorphous carbon may include soft carbon, hard carbon, mesophase pitch carbides, calcined coke, etc.

[0105] As a lithium metal alloy, an alloy of lithium with a metal selected from Na, K, Rb, Cs, Fr, Be, Mg, Ca, Sr, Si, Sb, Pb, In, Zn, Ba, Ra, Ge, Al, and Sn can be used.

[0106] As materials capable of doping and dedoping lithium, Si-based or Sn-based negative electrode active materials can be used. Si-based negative electrode active materials can be silicon, silicon-carbon composites, or SiO₂. x (0 < x ≤ 2), Si-Q alloy (Q is selected from alkali metals, alkaline earth metals, group 13 elements, group 14 elements (excluding Si), group 15 elements, group 16 elements, transition metals, rare earth elements, and combinations thereof) or combinations thereof. The active material for the Sn-based negative electrode can be Sn or SnO. x (0 < x ≤ 2, e.g. SnO2), Sn-based alloys or combinations thereof.

[0107] Silicon-carbon composites can be composites of silicon and amorphous carbon. According to one embodiment, the silicon-carbon composite can be in the form of silicon particles and amorphous carbon coated on the surface of the silicon particles. For example, the silicon-carbon composite can include secondary particles (cores) in which primary silicon particles are aggregated, and an amorphous carbon coating (shell) on the surface of the secondary particles. The amorphous carbon can be located between the primary silicon particles, for example, such that the primary silicon particles can be coated with amorphous carbon. The secondary particles can be dispersed in an amorphous carbon matrix.

[0108] The silicon-carbon composite may further include crystalline carbon. For example, the silicon-carbon composite may include a core comprising crystalline carbon and silicon particles, and an amorphous carbon coating on the surface of the core.

[0109] Si-based or Sn-based negative electrode active materials can be used in combination with carbon-based negative electrode active materials.

[0110] The second active material layer 212a may further include a negative electrode conductive material and a negative electrode binder.

[0111] The negative electrode conductive material imparts conductivity to the second active material layer 212a, and any suitable conductive material that does not cause a chemical change can be used. Examples of negative electrode conductive materials may include carbon-based materials (such as natural graphite, artificial graphite, carbon black, acetylene black, Ketjen black, carbon fibers, carbon nanofibers, and carbon nanotubes), metal-based materials in the form of metal powders or metal fibers containing copper, nickel, aluminum, silver, etc., conductive polymers (such as polyphenylene derivatives, etc.), or mixtures thereof.

[0112] The negative electrode binder is used to attach the particles constituting the negative electrode active material well, and also to attach the negative electrode active material well to the second electrode 212.

[0113] Examples of negative electrode adhesives may include non-aqueous adhesives, aqueous adhesives, dry adhesives, or combinations thereof.

[0114] Non-aqueous adhesives may include polyvinyl chloride, carboxylated polyvinyl chloride, polyvinyl fluoride, ethylene-propylene copolymer, polystyrene, polyurethane, polytetrafluoroethylene, polyvinylidene fluoride, polyethylene, polypropylene, polyamide-imide, polyimide, or combinations thereof.

[0115] Waterborne adhesives can be selected from styrene-butadiene rubber, (meth)acrylated styrene-butadiene rubber, (meth)acrylonitrile-butadiene rubber, (meth)acrylic rubber, butyl rubber, fluoroelastomers, polyethylene oxide, polyvinylpyrrolidone, polyepoxychloropropane, polyphosphazene, poly(meth)acrylonitrile, ethylene propylene diene copolymer, polyvinylpyridine, chlorosulfonated polyethylene, latex, polyester resin, (meth)acrylic resin, phenolic resin, epoxy resin, polyvinyl alcohol, and combinations thereof.

[0116] If the aqueous binder is used as the negative electrode binder, the aqueous binder may further include a cellulose-based compound capable of imparting viscosity. As a cellulose-based compound, one or more of carboxymethyl cellulose, hydroxypropyl methyl cellulose, methyl cellulose, and their alkali metal salts may be mixed and used. In one embodiment, the alkali metal may be Na, K, or Li.

[0117] Dry adhesives are polymeric materials that can be fibrous, such as polytetrafluoroethylene, polyvinylidene fluoride, polyvinylidene fluoride-hexafluoropropylene copolymer, polyethylene oxide, or combinations thereof.

[0118] The second electrode 212 may include a second uncoated portion 212b to which the second active material layer 212a is not coated. According to an embodiment, the second uncoated portion 212b may be located at the end region of the second electrode 212. However, the second uncoated portion 212b is not limited to this form, and in one embodiment, it may be formed over the entire edge region of the second electrode 212.

[0119] A diaphragm 213 may be disposed between the first electrode 211 and the second electrode 212. The diaphragm 213 can prevent or substantially prevent short circuits between the first electrode 211 and the second electrode 212, while allowing lithium ions to move between them. In one embodiment, the diaphragm 213 may be configured to completely surround the surface region of the electrode assembly 210. Accordingly, the diaphragm 213 can prevent or substantially prevent the first electrode 211 and the second electrode 212 from being directly exposed to the outside of the electrode assembly 210.

[0120] The diaphragm 213 may be made of polyethylene, polypropylene, polyvinylidene fluoride or a multilayer membrane of two or more layers thereof, and may be a mixed multilayer membrane such as a two-layer membrane of polyethylene / polypropylene, a three-layer membrane of polyethylene / polypropylene / polyethylene or a three-layer membrane of polypropylene / polyethylene / polypropylene.

[0121] The diaphragm 213 may include a porous substrate and a coating, comprising an organic material, an inorganic material, or a combination thereof, located on one or both or opposite surfaces of the porous substrate.

[0122] The porous substrate can be a polymer film made from one polymer selected from polyolefins (such as polyethylene and polypropylene), polyesters (such as polyethylene terephthalate and polybutylene terephthalate), polyacetal, polyamide, polyimide, polycarbonate, polyetherketone, polyaryletherketone, polyetherimide, polyamideimide, polybenzimidazole, polyethersulfone, polyphenylene ether, cyclic olefin copolymers, polyphenylene sulfide, polyethylene naphthalate, glass fiber and polytetrafluoroethylene (e.g., Teflon), or copolymers or mixtures of two or more of the above materials.

[0123] Organic materials may include polyvinylidene fluoride polymers or (meth)acrylic acid polymers.

[0124] Inorganic materials may include, but are not limited to, inorganic particles selected from Al2O3, SiO2, TiO2, SnO2, CeO2, MgO, NiO, CaO, GaO, ZnO, ZrO2, Y2O3, SrTiO3, BaTiO3, Mg(OH)2, boehmite and combinations thereof.

[0125] Organic and inorganic materials can be mixed in a coating, or they can be in the form of a coating that includes organic materials and a coating that includes inorganic materials stacked on top of each other.

[0126] The electrode assembly 210 according to the embodiment may further include a first terminal 214 and a second terminal 215.

[0127] The first connector 214 can be connected to the first electrode 211.

[0128] According to an embodiment, the first terminal piece 214 may have a foil shape extending from the first uncoated portion 211b of the first electrode 211 in a direction parallel to the second direction. The first terminal piece 214 may have a generally rectangular shape. However, the shape of the first terminal piece 214 is not limited to this and may be any of a variety of shapes.

[0129] In one embodiment, the first terminal piece 214 may be integrally formed with the first electrode 211. For example, the first terminal piece 214 may be the remaining area of ​​the first uncoated portion 211b after a portion of the first uncoated portion 211b has been cut or removed by a grooving process or the like. In one embodiment, the first terminal piece 214 may be manufactured separately from the first electrode 211 and then connected to the first uncoated portion 211b by welding or the like. In one embodiment, the material of the first terminal piece 214 may be the same as the material of the first electrode 211.

[0130] Multiple first terminals 214 may be provided. Each first terminal 214 may extend individually from the first uncoated portion 211b of a different first electrode 211. Adjacent first terminals 214 may be arranged facing each other along a first direction. That is, multiple first terminals 214 may be arranged along the first direction. Adjacent first terminals 214 may be arranged parallel to each other. Adjacent first terminals 214 may be in contact with each other, or may be spaced apart by the thickness of the diaphragm 213.

[0131] Multiple first terminals 214 may be provided on each first electrode 211. For example, a pair of first terminals 214 may be formed on each first electrode 211. The pair of first terminals 214 formed on each first electrode 211 may be arranged along a third direction.

[0132] The second connector 215 can be connected to the second electrode 212.

[0133] According to an embodiment, the second terminal 215 may have a foil shape extending from the second uncoated portion 212b of the second electrode 212 in a direction parallel to the second direction. The extending directions of the first terminal 214 and the second terminal 215 may be opposite to each other. The second terminal 215 may have a generally rectangular shape. However, the shape of the second terminal 215 is not limited to this and may be any of a variety of shapes.

[0134] In one embodiment, the second terminal piece 215 may be integrally formed with the second electrode 212. For example, the second terminal piece 215 may be the remaining area of ​​the second uncoated portion 212b after a portion of the second uncoated portion 212b has been cut or removed by grooving or the like. In one embodiment, the second terminal piece 215 may be manufactured separately from the second electrode 212 and then connected to the second uncoated portion 212b by welding or the like. In one embodiment, the material of the second terminal piece 215 may be the same as the material of the second electrode 212.

[0135] Multiple second terminals 215 may be provided. Each second terminal 215 may extend individually from the second uncoated portion 212b of a different second electrode 212. Adjacent second terminals 215 may be arranged facing each other along a first direction. That is, multiple second terminals 215 may be arranged along the first direction. Adjacent second terminals 215 may be arranged parallel to each other. Adjacent second terminals 215 may be in contact with each other, or may be spaced apart by the thickness of the diaphragm 213.

[0136] Multiple second terminals 215 may be provided on each second electrode 212. For example, a pair of second terminals 215 may be formed on each second electrode 212. The pair of second terminals 215 formed on each second electrode 212 may be arranged along a third direction.

[0137] The housing 220 may form the overall exterior of the battery cell 200 and may house the electrode assembly 210. In one embodiment, the housing 220 may comprise a conductive metallic material, such as aluminum, aluminum alloy, or nickel-plated steel.

[0138] According to an embodiment, the housing 220 may include a bottom portion 221, a first side portion 222, and a second side portion 223.

[0139] The bottom portion 221 may form the lower exterior of the housing 220. According to an embodiment, the bottom portion 221 may have a rectangular plate shape. The bottom portion 221 may be configured to face the bottom surface of the housing body 110. The bottom portion 221 may be configured to face the bottom surface of the housing body 110 along a third direction.

[0140] The first side portion 222 may extend from the bottom portion 221 and form part of the exterior of the side surface of the housing 220.

[0141] According to an embodiment, the first side portion 222 may have a rectangular plate shape extending from the bottom portion 221 in a direction parallel to a third direction. The first side portion 222 may be disposed perpendicular to a second direction. The lower end portion of the first side portion 222 may be connected to the edge of the bottom portion 221 disposed parallel to the first direction. The upper end portion of the first side portion 222 may be configured to face the housing cover 120. The upper end portion of the first side portion 222 may be configured to face the housing cover 120 along a third direction.

[0142] A pair of first side portions 222 may be provided. The pair of first side portions 222 may be arranged at a certain interval and may face each other along a second direction. The pair of first side portions 222 may be arranged parallel to each other.

[0143] The second side portion 223 may extend from the bottom portion 221 and may form the remainder of the exterior of the side surface of the housing 220.

[0144] According to the embodiment, the second side portion 223 may have a rectangular plate shape extending from the bottom portion 221 in a direction parallel to a third direction. The second side portion 223 may be configured to intersect with the first side portion 222. For example, the second side portion 223 may be configured perpendicular to the first direction.

[0145] The lower end of the second side portion 223 can be connected to the edge of the bottom portion 221 that is parallel to the second direction. The upper end of the second side portion 223 can be configured to face the outer casing cover 120. The upper end of the second side portion 223 can be configured to face the outer casing cover 120 along a third direction.

[0146] The area of ​​the second side portion 223 can be larger than the area of ​​the first side portion 222.

[0147] A pair of second side portions 223 may be provided. The pair of second side portions 223 may be arranged at a certain interval and may face each other along a first direction. The pair of second side portions 223 may be arranged parallel to each other.

[0148] Accordingly, the housing 220 according to the embodiment may have a cuboid shape and an open upper portion facing the outer casing 120.

[0149] The cover plate 230 can be connected to the housing 220 and can seal the housing 220.

[0150] According to the embodiment, the cover plate 230 can be formed to have a flat plate shape. The cover plate 230 can be configured to face the housing 220 along a third direction. For example, the inner surface of the cover plate 230 can be configured to face the open upper portion of the housing 220. The outer surface of the cover plate 230 can be configured to face the inner surface of the outer cover 120. The cover plate 230 can be disposed parallel to the bottom portion 221 of the housing 220 and the outer cover 120.

[0151] In one embodiment, the cover plate 230 may be disposed on the upper end portion of the second side portion 223 and the upper end portion of the first side portion 222. In one embodiment, the cover plate 230 may be inserted into the housing 220, and its outer peripheral surface may contact the inner surface of the second side portion 223 and the inner surface of the first side portion 222. The cover plate 230 may be connected to the upper end portion of the second side portion 223 and the upper end portion of the first side portion 222 by any of various types of connection methods such as welding, bolting, mating, etc.

[0152] Terminal 240 can be connected to cover 230 and can protrude outward from cover 230. Terminal 240 can be electrically connected to electrode assembly 210.

[0153] According to the embodiment, the terminal 240 can pass through the cover plate 230 in a third direction. The upper portion of the terminal 240 can protrude outward from the cover plate 230, and the lower portion of the terminal 240 can protrude into the housing 220. The specific shape of the terminal 240 is not limited to this. Figures 2 to 3 The shape shown can be transformed into any shape with various shapes.

[0154] Terminal 240 may be formed of a conductive material such as aluminum, nickel, copper, etc.

[0155] A pair of terminals 240 may be provided. The pair of terminals 240 may be arranged at intervals on the cover plate 230 along the second direction.

[0156] A pair of terminals 240 can be connected to the first electrode 211 and the second electrode 212 of the electrode assembly 210, respectively. Accordingly, the pair of terminals 240 can be used as the positive electrode terminal and the negative electrode terminal of the battery cell 200, respectively.

[0157] For example, either terminal 240 of a pair of terminals 240 may be connected to the first terminal 214. In one embodiment, either terminal 240 may be indirectly connected to the first terminal 214 via a current collector 241 soldered to the first terminal 214. In another embodiment, terminal 240 may be directly connected to the first terminal 214.

[0158] Furthermore, the other terminal 240 of the pair of terminals 240 can be connected to the second terminal piece 215. In one embodiment, the other terminal 240 of the pair of terminals 240 can be indirectly connected to the second terminal piece 215 via a current collector 241 soldered to the second terminal piece 215. In another embodiment, the terminal 240 can be directly connected to the second terminal piece 215.

[0159] In one embodiment, an insulator G may be mounted between the electrode assembly 210 and the cover plate 230. A pair of insulators G may be provided. The pair of insulators G may be spaced apart from each other between the electrode assembly 210 and the cover plate 230 along a second direction. The pair of insulators G may be configured to surround different terminals 240 respectively. The insulator G may be formed of an insulating material such as polyethylene (PE), polypropylene (PP), polyethylene terephthalate (PET), rubber, etc.

[0160] The exhaust element 250 can be installed in the cover plate 230 and can open and close in response to changes in the internal pressure of the housing 220. If the internal pressure of the housing 220 rises above a certain pressure (e.g., a set pressure) due to overcurrent, thermal runaway, etc., the exhaust element 250 can provide a discharge path for gases, flames, smoke, etc. generated in the housing 220. The exhaust element 250 can be disposed between a pair of terminals 240. The longitudinal direction of the exhaust element 250 described below can refer to a direction parallel to a second direction, and the width direction of the exhaust element 250 can refer to a direction parallel to a first direction.

[0161] The vent 250 may be spaced apart from the terminal 240 along the second direction. For example, the vent 250 may be disposed between a pair of terminals 240 facing each other along the second direction.

[0162] In one embodiment, the exhaust member 250 may include an exhaust port 251 and an exhaust plate 252.

[0163] The vent 251 can be formed as a hole shape that passes through the cover plate 230 along a third direction. The lower side of the vent 251 can be connected to the interior space of the housing 220. The upper side of the vent 251 can be connected to the space outside the cover plate 230. The cross-sectional shape of the vent 251 can be any shape of various shapes such as elliptical, circular, polygonal, etc.

[0164] The vent plate 252 can open and close in response to changes in the internal pressure of the housing 220. That is, the vent plate 252 can remain closed during normal operation of the battery cell 200 to seal the housing 220. The vent plate 252 can open when the internal pressure of the housing 220 rises above a certain pressure (e.g., a set pressure) due to overcharging of the battery cell 200, the occurrence of a fire, etc., and can discharge flames, gases, smoke, etc., generated inside the housing 220 to the outside of the housing 220.

[0165] According to an embodiment, the exhaust plate 252 can be formed into a flat plate shape. The exhaust plate 252 can be configured to face the exhaust hole 251 along a third direction. In one embodiment, the thickness of the exhaust plate 252 can be less than the thickness of the cover plate 230. The upper surface of the exhaust plate 252 can be connected to the lower surface of the cover plate 230 by any of various types of connection methods such as welding, bolting, mating, etc. In one embodiment, the exhaust plate 252 can be inserted into the exhaust hole 251, and the outer peripheral surface of the exhaust plate 252 can be connected to the inner surface of the exhaust hole 251.

[0166] In one embodiment, an exhaust recess 253 may be formed in the exhaust plate 252 to induce a breaking operation of the exhaust plate 252. The exhaust recess 253 according to the embodiment may have a groove shape that recesses inward from the outer surface of the exhaust plate 252 toward the interior of the exhaust plate 252. However, the shape of the exhaust recess 253 is not limited to this. Figure 3 The shape shown can be formed into any pattern with various patterns on the exhaust plate 252.

[0167] The cell busbar 300 can be connected to the battery cell 200. The cell busbar 300 can be used to electrically interconnect multiple battery cells 200. The cell busbar 300 can be formed of a conductive material (such as copper, nickel, aluminum, etc.).

[0168] The cell busbar 300 can be disposed between the battery cell 200 and the housing cover 120. The cell busbar 300 can be configured as a terminal 240 facing the battery cell 200 along a third direction between the battery cell 200 and the housing cover 120.

[0169] Multiple individual cell busbars 300 can be provided. These multiple individual cell busbars 300 can connect multiple battery cells 200 in series, parallel, or a combination of series and parallel connections. For example, each individual cell busbar 300 can be connected to a terminal 240 serving as a positive electrode in one of adjacent battery cells 200 arranged along a first direction and a terminal 240 serving as a negative electrode in another adjacent battery cell 200. The individual cell busbars 300 can be mechanically connected and electrically connected to the terminals 240 via methods such as laser welding.

[0170] However, the specific shape and arrangement of the individual busbar 300 are not limited to Figure 1 and Figure 2 Those shown can be designed to have any of a variety of shapes and arrangements.

[0171] The bracket 400 can be mounted on the battery cell 200 and can support the cell busbar 300.

[0172] According to an embodiment, the bracket 400 can be disposed between the battery cell 200 and the housing cover 120. The bracket 400 can be formed of an insulating material (such as polyethylene (PE), polypropylene (PP), polyethylene terephthalate (PET), etc.) to ensure the insulation of the battery cell 200.

[0173] The support 400 may include a first support surface 401 and a second support surface 402 that are opposite to each other.

[0174] In one embodiment, the first bracket surface 401 and the second bracket surface 402 may be arranged perpendicular to a third direction. The first bracket surface 401 may be the lower surface of the bracket 400 facing the battery cell 200, and the second bracket surface 402 may be the upper surface of the bracket 400 facing the housing cover 120.

[0175] According to an embodiment, the bracket 400 may include a bracket vent 410.

[0176] According to an embodiment, the bracket vent 410 may have a hole shape that passes through the central region of the bracket 400 along a third direction and faces the vent 250 of the battery cell 200. In one embodiment, the area of ​​the bracket vent 410 may be larger than the area of ​​the vent 250.

[0177] Multiple bracket vents 410 can be provided. The multiple bracket vents 410 can be arranged at certain intervals along a first direction. In one embodiment, the number of bracket vents 410 can be the same as the number of battery cells 200, and each bracket vent 410 can be configured to face the vent 250 of a different battery cell 200.

[0178] The bracket 400 according to an embodiment may include a support hole 420.

[0179] The support hole 420 provides space to accommodate the individual busbar 300 in the bracket 400.

[0180] According to the embodiment, the support hole 420 may have a hole shape that passes through the bracket 400 along a third direction. The support hole 420 may be configured to face the terminal 240 of the battery cell 200. The support hole 420 and the bracket vent 410 may be spaced apart from each other along a second direction.

[0181] Multiple support holes 420 can be provided. The multiple support holes 420 can be arranged in two rows along a second direction, with the bracket vent 410 between them. The multiple support holes 420 in each row can be arranged at intervals along a first direction. Each individual busbar 300 can be inserted into a corresponding support hole 420. The individual busbar 300 can be supported in the support hole 420 by any of various methods such as mating with the bracket 400, simple contact, bolting, welding, etc.

[0182] The module busbar 500 can be connected to the individual unit busbar 300. The module busbar 500 can provide electrical connections between different individual unit modules or between the battery module and external electronic devices. The module busbar 500 can be formed of conductive materials such as copper, nickel, aluminum, etc.

[0183] The module busbar 500 may include an extension portion 510 and a connection portion 520.

[0184] The extension portion 510 can form the exterior of one side of the module busbar 500 and can be mounted on the bracket 400.

[0185] According to the embodiment, the extension portion 510 can extend along a first direction. That is, the longitudinal direction of the extension portion 510 can be arranged parallel to the first direction, and the width direction of the extension portion 520 can be arranged parallel to a second direction.

[0186] The extension portion 510 may include a first surface 501 disposed facing the second support surface 402 of the support 400 (e.g., see...). Figure 6 ) and a second surface 502 opposite to the first surface 501 (e.g., see Figure 6 The first surface 501 can be arranged parallel to the second support surface 402. The first surface 501 and the second surface 502 can be arranged parallel to each other.

[0187] The extension portion 510 can be disposed between the bracket vent 410 and the support hole 420. The width of the extension portion 510 in the second direction can be less than the interval between the bracket vent 410 and the support hole 420. Accordingly, the extension portion 510 can avoid interfering with the bracket vent 410 and the support hole 420.

[0188] The end portion of the extension portion 510 can be connected to any one of the multiple individual busbars 300. The end portion of the extension portion 510 can be connected to the individual busbar 300 by any of a variety of connection methods such as laser welding, ultrasonic welding, bolt connection, etc.

[0189] The connecting portion 520 can be connected to the extension portion 510 and can form the exterior of the other side of the module busbar 500. The connecting portion 520 can be disposed outside the bracket 400. According to the embodiment, the connecting portion 520 can be the remaining area of ​​the module busbar 500 that does not directly face the bracket 400 and is disposed outside the bracket 400. The connecting portion 520 can be connected to the module busbar 500 of an external electronic device or another battery module by any of a variety of connection methods such as welding, bolting, etc. However, the shape of the connecting portion 520 is not limited to... Figure 2 The shape shown can be any shape among various shapes.

[0190] The adhesive member 600 secures the extension 510 to the bracket 400. That is, the adhesive member 600 secures the relative position of the module busbar 500 with respect to the bracket 400. Accordingly, the adhesive member 600 prevents or substantially prevents separation of the module busbar 500 due to overvoltage during thermal runaway of the battery cell 200, and prevents or substantially prevents short circuits between the module busbar 500 and the housing cover 120. In one embodiment, the adhesive member 600 may comprise a resin material having adhesive strength, such as epoxy resin, urethane, polyurethane, etc.

[0191] Figure 6 It is shown schematically. Figure 1 A view of the configuration of the adhesive components of the battery module.

[0192] refer to Figures 1 to 6 According to an embodiment, the adhesive member 600 may include a first adhesive member 610.

[0193] The first adhesive member 610 can be disposed between the bracket 400 and the extension portion 510.

[0194] According to an embodiment, the first adhesive member 610 can be applied to the second support surface 402 of the support 400. The first adhesive member 610 can be disposed between the support vent 410 and the support hole 420. The first adhesive member 610 can be applied to the second support surface 402 in a liquid state. A plurality of first adhesive members 610 can be provided. In one embodiment, a plurality of first adhesive members 610 can be arranged in multiple rows on the second support surface 402 along a first direction and a second direction.

[0195] When the extension 510 is placed on the second support surface 402, the first surface 501 of the extension 510 can contact the first adhesive member 610. During this process, a plurality of first adhesive members 610 arranged in multiple rows along a first and a second direction on the second support surface 402 can be spread along the first and second directions and can connect to each other by the compressive force between the extension 510 and the support 400. Accordingly, in one embodiment, the first adhesive member 610 can ensure the bonding force between the extension 510 and the support 400 over the entire area of ​​the extension 510.

[0196] Subsequently, the first adhesive member 610 hardens into a solid state, and can integrally fix the bracket 400 and the extension portion 510.

[0197] In this document, a battery module according to another embodiment of the present disclosure will be described.

[0198] According to another embodiment, the battery module can be configured with respect to the bracket 400 and the adhesive member 600. Figure 1 The battery modules are different.

[0199] Accordingly, in the description of the battery module according to this embodiment, only those related to... Figure 1 Detailed configuration of different brackets 400 and adhesive components 600 for the battery module.

[0200] Figure 1 The description of the battery module can be applied as is to the remaining configurations of the battery module according to this embodiment.

[0201] Figure 7 This is a schematic cross-sectional view illustrating the configuration of a battery module according to another embodiment of the present disclosure; Figure 8 It is shown schematically. Figure 7 An exploded perspective view of the battery module configuration; and Figures 9 to 11 It schematically shows the formation Figure 7 A view of the process of bonding components for the battery module.

[0202] refer to Figures 7 to 11 According to this embodiment, the adhesive member 600 may further include a second adhesive member 620 and a connecting portion 630.

[0203] The second adhesive component 620 can be disposed between the battery cell 200 and the bracket 400.

[0204] The second adhesive member 620 according to the embodiment can be applied to the cover plate 230 of the battery cell 200. The second adhesive member 620 can be applied to the cover plate 230 in a liquid state. The second adhesive member 620 can be disposed between the venting member 250 and the terminal 240.

[0205] The longitudinal direction of the second adhesive member 620 can be parallel to the first direction, and the width direction of the second adhesive member 620 can be parallel to the second direction. The length of the second adhesive member 620 can be greater than the width of the cover plate 230 in the first direction. Accordingly, the second adhesive member 620 can be disposed on the cover plate 230 of a plurality of battery cells 200 arranged along the first direction. The length of the second adhesive member 620 can be less than the length of the extension portion 510. The width of the second adhesive member 620 can be less than the interval between the vent 250 and the terminal 240. Accordingly, the second adhesive member 620 may not be in direct contact with the vent 250 and the terminal 240.

[0206] The connecting portion 630 can be disposed between the first adhesive member 610 and the second adhesive member 620. The connecting portion 630 can connect the first adhesive member 610 and the second adhesive member 620 to each other.

[0207] According to the embodiment, the connecting portion 630 can be disposed in the bracket bonding hole 430 formed through the bracket 400.

[0208] For example, the bracket bonding hole 430 may have a hole shape that passes through the bracket 400 along a third direction. The bracket bonding hole 430 may be disposed between the battery cell 200 and the extension portion 510. That is, the upper and lower portions of the bracket bonding hole 430 may be configured to face the extension portion 510 and the battery cell 200, respectively.

[0209] The bracket bonding hole 430 can be disposed between the bracket vent 410 and the support hole 420. Multiple bracket bonding holes 430 can be provided. These multiple bracket bonding holes 430 can be arranged in multiple rows along a first direction and a second direction between the bracket vent 410 and the support hole 420. However, the arrangement of the multiple bracket bonding holes 430 can vary in various ways within a range where the upper portion of the bracket bonding holes 430 faces the extension portion 510.

[0210] The connecting portion 630 can extend from the second adhesive member 620 toward the bracket adhesive hole 430. For example, when the bracket 400 is pressed toward the battery cell 200, the portion of the second adhesive member 620 applied to the battery cell 200 can be introduced or configured to be introduced into the bracket adhesive hole 430 by the pressure acting between the bracket 400 and the battery cell 200, and can form the connecting portion 630. That is, in one embodiment, the connecting portion 630 can be the portion of the second adhesive member 620 introduced into the bracket adhesive hole 430.

[0211] Multiple connecting parts 630 can be provided. Each connecting part 630 can be individually provided in a different bracket adhesive hole 430.

[0212] In one embodiment, when the bracket 400 is pressed toward the battery cell 200, the first adhesive member 610 can be introduced through the bracket adhesive hole 430 between the bracket 400 and the extension portion 510, i.e., introduced onto the second bracket surface 402. In one embodiment, the first adhesive member 610 can be the portion of the connecting portion 630 that overflows onto the second bracket surface 402 through the upper end of the bracket adhesive hole 430. The cross-sectional area of ​​the first adhesive member 610 can be larger than the cross-sectional area of ​​the connecting portion 630.

[0213] Multiple first adhesive members 610 can be respectively connected to multiple connecting portions 630.

[0214] After the plurality of first adhesive members 610 are disposed on the second support surface 402, the extension portion 510 can be placed on the second support surface 402 and can contact the first adhesive members 610. In this process, the plurality of first adhesive members 610 can be spread along the first and second directions and can be connected to each other by the compressive force between the extension portion 510 and the support 400.

[0215] In this document, a battery module according to another embodiment of the present disclosure will be described.

[0216] Figure 12 This is a schematic cross-sectional view illustrating the configuration of a battery module according to another embodiment of the present disclosure; and Figures 13 to 15 It schematically shows the formation Figure 12 A view of the process of bonding components for the battery module.

[0217] refer to Figures 12 to 15 The battery module according to this embodiment may further include a slot 700.

[0218] The battery module according to this embodiment can be connected with... Figure 7 The only difference between the battery module and the one that further includes a slot 700 is that the battery module is further distinguished from the one that includes a slot 700.

[0219] Accordingly, in the description of the battery module according to this embodiment, only those not in Figure 7 The slot 700 is described in the battery module.

[0220] Figure 7 The description of the battery module can be applied as is to the remaining configurations of the battery module according to this embodiment.

[0221] The groove 700 may be spaced apart from the bracket adhesive hole 430 and may be recessed from the first bracket surface 401 toward the second bracket surface 402. The groove 700 may prevent the second adhesive member 620 from being introduced into the terminal 240 or the vent 250 during the process of placing the bracket 400 on the battery cell 200.

[0222] According to an embodiment, slot 700 may include a first slot 710 and a second slot 720.

[0223] The first groove 710 and the second groove 720 can be provided on both sides or opposite sides of the bracket bonding hole 430. For example, the first groove 710 and the second groove 720 can be spaced apart along a second direction, with the bracket bonding hole 430 between them.

[0224] The gap L1 between the first groove 710 and the second groove 720 can be smaller than the gap L2 between the terminal 240 and the vent 250. Here, the gap L1 between the first groove 710 and the second groove 720 can refer to the maximum gap between the first groove 710 and the second groove 720 in the second direction. Accordingly, when the bracket 400 is placed on the battery cell 200, the end region of the second adhesive member 620 that diffuses toward the terminal 240 and the vent 250 can be introduced into the first groove 710 and the second groove 720 before contacting the terminal 240 and the vent 250.

[0225] The first groove 710 and the second groove 720 can pass through the second support surface 402. In one embodiment, the first groove 710 and the second groove 720 may have a hole shape that passes through the first support surface 401 and the second support surface 402 along a third direction. The interval L1 between the first groove 710 and the second groove 720 may be less than the width L3 of the extension portion 510 in the second direction. Accordingly, in one embodiment, the end region of the second adhesive member 620 introduced into the first groove 710 and the second groove 720 can pass through the first groove 710 and the second groove 720 to the second support surface 402 and serve as an adhesive means for securing the extension portion 510 to the support 400. However, the first groove 710 and the second groove 720 are not limited to these shapes and may have a groove shape that does not pass through the second support surface 402.

[0226] The longitudinal direction of the first groove 710 and the second groove 720 may be parallel to the first direction. The first groove 710 and the second groove 720 may have a straight line shape that extends continuously along the first direction. In one embodiment, a plurality of first grooves 710 and a plurality of second grooves 720 are provided, and the plurality of first grooves 710 and second grooves 720 may be arranged at certain intervals along the first direction.

[0227] In this document, a battery module according to another embodiment of the present disclosure will be described.

[0228] The battery module according to this embodiment can be similar to the module busbar 500 and adhesive member 600 only in terms of their configuration. Figure 7 The battery modules are different.

[0229] Accordingly, in the description of the battery module according to this embodiment, only those described according to... Figure 7 Detailed configuration of different module busbars 500 and adhesive components 600 for the battery module.

[0230] Figure 7 The description of the battery module can be applied as is to the remaining configurations of the battery module according to this embodiment.

[0231] Figure 16 This is a perspective view schematically illustrating the configuration of a battery module according to another embodiment of the present disclosure; Figure 17 It is shown schematically. Figure 16 An exploded perspective view of the battery module configuration; and Figure 18 It is shown schematically. Figure 16 A cross-sectional view of the battery module configuration.

[0232] refer to Figures 16 to 18 According to this embodiment, the module busbar 500 may further include a busbar bonding hole 530 passing through the extension portion 510.

[0233] In one embodiment, the busbar bonding hole 530 may have a hole shape that passes through the center of the extension 510 (e.g., the center of the extension 510 in a second direction) along a third direction. A plurality of busbar bonding holes 530 may be provided. The plurality of busbar bonding holes 530 may be spaced apart from each other in the extension 510. The plurality of busbar bonding holes 530 may be arranged at intervals along a first direction. However, the number of busbar bonding holes 530 is not limited to this. Figure 17 The quantity shown, and can have any quantity from various quantities.

[0234] Figure 19 It is shown schematically. Figure 16 An enlarged view of the configuration of the busbar bonding holes in the battery module.

[0235] refer to Figures 16 to 19 According to the embodiment, the manifold adhesive hole 530 may include a first through portion 531 and a second through portion 532.

[0236] The first through portion 531 may be the lower end region of the first surface 501 of the through extension portion 510 of the busbar bonding hole 530 in the entire area of ​​the busbar bonding hole 530.

[0237] The second through portion 532 may be the second surface 502 of the through extension portion 510 of the busbar bonding hole 530 in the entire area of ​​the busbar bonding hole 530 and connected to the upper region of the first through portion 531.

[0238] The adhesive member 600 according to the embodiment may further include a third adhesive member 640.

[0239] The third adhesive member 640 may extend from the first adhesive member 610 and may be disposed in the busbar adhesive hole 530. The third adhesive member 640 may be used as a configuration to strengthen the connection force between the support 400 and the extension 510 in the busbar adhesive hole 530.

[0240] Figure 20 and Figure 21 It schematically shows the formation Figure 16 A view of the process of the third adhesive component of the battery module.

[0241] refer to Figures 16 to 21 When the extension 510 is pressed toward the bracket 400, a portion of the first adhesive member 610, which passes through the bracket adhesive hole 430 and is transferred to the second bracket surface 402, can be introduced into the busbar adhesive hole 530 by the pressure acting between the extension 510 and the bracket 400, and can form a third adhesive member 640. In one embodiment, the third adhesive member 640 may be the portion of the first adhesive member 610 introduced into the busbar adhesive hole 530.

[0242] The busbar bonding hole 530 can be configured to be offset from the bracket bonding hole 430. That is, the busbar bonding hole 530 and the bracket bonding hole 430 can be configured not to face each other along a third direction. Accordingly, the first adhesive member 610 transferred to the second bracket surface 402 may not be immediately introduced into the busbar bonding hole 530, but may be introduced into the busbar bonding hole 530 after sufficient contact area with the second bracket surface 402 and the first surface 501 has been ensured.

[0243] In one embodiment, the cross-sectional area of ​​the second through portion 532 may be larger than the cross-sectional area of ​​the first through portion 531. Accordingly, the upper portion of the third adhesive member 640 introduced into the busbar adhesive hole 530 may be located in the busbar adhesive hole 530 without overflowing onto the second surface 502 of the extension portion 510.

[0244] In this document, a battery module according to another embodiment of the present disclosure will be described.

[0245] The battery module according to this embodiment can be modified only in terms of the configuration of the busbar adhesive hole 530 and the third adhesive member 640. Figure 16 The battery modules are different.

[0246] Accordingly, in the description of the battery module according to this embodiment, only those related to... Figure 16Detailed configuration of the different busbar bonding holes 530 and the third bonding member 640 of the battery module.

[0247] Figure 16 The description of the battery module can be applied as is to the remaining configurations of the battery module according to this embodiment.

[0248] Figure 22 This is a perspective view schematically illustrating the configuration of a battery module according to another embodiment of the present disclosure; Figure 23 It is shown schematically. Figure 22 An exploded perspective view of the battery module configuration; and Figure 24 It is shown schematically. Figure 22 A cross-sectional view of the battery module configuration.

[0249] refer to Figures 22 to 24 According to the embodiment, the busbar bonding hole 530 can be formed recessed from the side surface of the extension portion 510. The upper and lower portions of the busbar bonding hole 530 can pass through the second surface 502 and the first surface 501 of the extension portion 510, respectively.

[0250] Multiple busbar bonding holes 530 may be provided. In one embodiment, the multiple busbar bonding holes 530 may be symmetrically arranged on both sides or opposite sides of the extension portion 510 perpendicular to the second direction. The multiple busbar bonding holes 530 arranged on any side of the extension portion 510 may be arranged at certain intervals along the first direction.

[0251] The battery module according to the embodiment may further include rib 440.

[0252] Figure 25 It is shown schematically. Figure 22 An enlarged view of the rib configuration of the battery module.

[0253] refer to Figures 22 to 25 According to the embodiment, the rib 440 may have the form of a partition wall extending from the second support surface 402 of the support 400. The rib 440 may be configured to face the side surface of the extension 510 along a second direction. The rib 440 may contact the side surface of the extension 510.

[0254] A pair of ribs 440 may be provided. The pair of ribs 440 may be configured to face the two side surfaces of the extension 510 perpendicular to the second direction.

[0255] Figure 26 and Figure 27 It schematically shows the formation Figure 22 A view of the process of the third adhesive component of the battery module.

[0256] refer to Figures 22 to 27When the extension 510 is pressed toward the bracket 400, a portion of the first adhesive member 610, which passes through the bracket adhesive hole 430 and is transferred to the second bracket surface 402, can be introduced into the busbar adhesive hole 530 by the pressure acting between the extension 510 and the bracket 400, and can form a third adhesive member 640.

[0257] Since the rib 440 is in contact with the side surface of the extension 510, a portion of the first adhesive member 610 (i.e., the third adhesive member 640) can secure the extension 510 to the rib 440 in the busbar adhesive hole 530 without separating it from the busbar adhesive hole 530.

[0258] Figure 7 The description of the battery module can be applied as is to the remaining configurations of the battery module according to this embodiment.

[0259] According to one or more embodiments of this disclosure, it is possible to prevent or substantially prevent the separation of the module busbar due to overvoltage that may occur during thermal runaway of the battery cell, and to prevent or substantially prevent short circuits between the module busbar and the housing.

[0260] However, the aspects and effects that can be obtained through this disclosure are not limited to those described above, and those skilled in the art will clearly understand from the description of this disclosure other technical aspects and effects not mentioned.

[0261] While this disclosure has been described with reference to some embodiments shown in the accompanying drawings, these embodiments are merely illustrative, and it should be understood that those skilled in the art can derive various modifications and equivalent other embodiments based on these embodiments.

Claims

1. A battery module, comprising: shell; Multiple battery cells are arranged in the housing along a first direction; Multiple individual busbars are connected to the multiple battery cells; A bracket is arranged on the plurality of battery cells and supports the plurality of cell busbars; A module busbar, including an extension connected to the individual busbar and disposed on the bracket; as well as An adhesive component secures the extension portion to the bracket.

2. The battery module according to claim 1, wherein the extension portion is arranged parallel to the first direction.

3. The battery module according to claim 1, wherein the adhesive member includes a first adhesive member between the bracket and the extension portion.

4. The battery module according to claim 3, wherein the bracket includes a bracket bonding hole between the battery cell and the extension portion, and The adhesive component further includes: A second adhesive member between the battery cell and the bracket; And the connecting portion in the adhesive hole of the bracket and connected to the first adhesive member and the second adhesive member.

5. The battery module of claim 4, wherein the first adhesive member is formed by being introduced between the bracket and the extension portion through the bracket adhesive hole when the bracket is pressed toward the battery cell.

6. The battery module according to claim 4, wherein the cross-sectional area of ​​the first adhesive member is greater than the cross-sectional area of ​​the connecting portion.

7. The battery module according to claim 4, wherein the bracket bonding holes include a plurality of bracket bonding holes spaced apart from each other between the battery cell and the module busbar.

8. The battery module according to claim 4, wherein each of the plurality of battery cells comprises: The exhaust component faces the bracket; as well as Terminals, spaced apart from the exhaust components and connected to the corresponding individual busbar among the plurality of individual busbars, and The second adhesive member is located between the exhaust element and the terminal.

9. The battery module according to claim 8, wherein the bracket further comprises: The surface of the first support faces the battery cell; The surface of the second support is opposite to the surface of the first support. as well as The groove is spaced apart from the adhesive hole of the bracket and is formed recessedly from the surface of the first bracket toward the surface of the second bracket.

10. The battery module of claim 9, wherein the vent and the terminal are spaced apart along a second direction intersecting the first direction, and The groove includes a first groove and a second groove, which are spaced apart along the second direction and located on opposite sides of the adhesive hole of the bracket.

11. The battery module according to claim 10, wherein the interval between the first slot and the second slot is smaller than the interval between the terminal and the vent.

12. The battery module of claim 10, wherein the first groove and the second groove pass through the surface of the second bracket.

13. The battery module of claim 12, wherein the interval between the first slot and the second slot is less than the width of the extension portion in the second direction.

14. The battery module according to any one of claims 4 to 13, wherein the module busbar includes a busbar bonding hole passing through the extension portion, and The adhesive member further includes a third adhesive member extending from the first adhesive member and located in the manifold adhesive hole.

15. The battery module of claim 14, wherein the busbar bonding holes comprise a plurality of busbar bonding holes spaced apart from each other in the extension portion.

16. The battery module according to claim 14, wherein the busbar bonding hole is offset from the bracket bonding hole.

17. The battery module of claim 14, wherein the extension includes a first surface facing the bracket and a second surface opposite to the first surface. The busbar bonding hole includes: The first through-portion passing through the first surface; And a second through portion that passes through the second surface and connects to the first through portion, and The cross-sectional area of ​​the second through portion is greater than the cross-sectional area of ​​the first through portion.

18. The battery module of claim 14, wherein the busbar bonding hole is recessed from the side surface of the extension portion.

19. The battery module of claim 18, further comprising a rib extending from the bracket and facing the side surface of the extension portion.

20. The battery module of claim 19, wherein the rib contacts the side surface of the extension.

Images