Cover assembly, battery including cover assembly, and battery pack including cover assembly

Abstract

The disclosure relates to a cap assembly, a battery including the cap assembly, and a battery pack including the cap assembly. A cap assembly according to one embodiment includes: a cap plate coupled to a case to cover an opening in the case, the case accommodating an electrode assembly therein; a terminal extending through the cap plate, a first end portion of the terminal being electrically connected to an electrode of the electrode assembly and a second end portion of the terminal protruding to an outside of the case; an insulating member, at least a portion of which is disposed between the cap plate and the terminal to electrically insulate the cap plate and the terminal; and a wiring member electrically connecting the cap plate and the terminal.

Description

[0001] Cross-reference to related applications

[0002] This application claims priority and benefit to Korean Patent Application No. 10-2024-0140849, filed with the Korean Intellectual Property Office on October 16, 2024, the entire disclosure of which is incorporated herein by reference. Technical Field

[0003] This disclosure relates to a cover assembly, a battery including a cover assembly, and a battery pack including a cover assembly. Background Technology

[0004] Unlike primary batteries, which cannot be recharged, secondary batteries can be discharged and recharged. Low-capacity secondary batteries are used in small portable electronic devices such as smartphones, feature phones, laptops, digital cameras, and camcorders. High-capacity secondary batteries are widely used as motor drive power sources and storage batteries in hybrid vehicles, electric vehicles, and the like. Such secondary batteries include a positive electrode, a negative electrode, an electrode assembly containing the electrodes, a housing (or canister) housing the electrode assembly, and electrode terminals connected to the electrode assembly.

[0005] With technological advancements, there is a need for rechargeable batteries with higher capacity. Therefore, multiple rechargeable batteries can be electrically connected and used together. For example, rechargeable batteries can be applied to electronic devices in the form of battery modules comprising multiple rechargeable batteries and / or battery packs comprising multiple battery modules. In other words, a battery pack can consist of multiple rechargeable batteries. Battery packs can be used in electronic devices requiring high output and / or high capacity, such as electric vehicles.

[0006] A battery module or battery pack (hereinafter referred to as a "battery pack") has multiple secondary batteries arranged in a housing in at least one direction. The multiple secondary batteries may be arranged adjacent to each other in the housing, or they may be spaced apart from each battery by a predetermined gap. In this case, if any one of the secondary batteries experiences a short circuit, the short circuit may propagate to the entire pack, potentially leading to a thermal runaway event.

[0007] The above information forms the background of this disclosure and is intended only to enhance understanding of this disclosure; therefore, it may include information that does not constitute related technology. Summary of the Invention

[0008] This disclosure relates to providing a cover assembly that can suppress or prevent short circuits from extending to adjacent secondary cells or the entire battery pack, even when a voltage equal to or greater than a reference value is applied to any secondary cell in the battery pack and / or a current equal to or greater than a reference value flows to any secondary cell in the battery pack. The invention also relates to batteries and battery packs including the cover assembly.

[0009] However, the technical problems to be solved by this disclosure are not limited to those described above, and those skilled in the art can clearly understand other unmentioned problems from the description provided herein.

[0010] According to embodiments of the present disclosure, a cover assembly is provided, the cover assembly comprising: a cover plate configured to cover an opening in a battery housing, the housing accommodating an electrode assembly; a terminal extending through the cover plate, a first end of the terminal being configured to be electrically connected to an electrode of the electrode assembly and a second end of the terminal being configured to protrude to the outside of the housing; an insulating member, at least a portion of which is disposed between the cover plate and the terminal to electrically insulate the cover plate and the terminal; and a wiring member electrically connecting the cover plate and the terminal.

[0011] According to one aspect of the embodiment, the wiring member can be a short-circuit propagation prevention member, with a first end connected to a cover plate and a second end connected to a terminal. For example, the wiring member can be a fuse component.

[0012] According to another aspect of the embodiment, the wiring member can be bonded to the surface of the insulating member. For example, the insulating member and the wiring member can be manufactured by insert injection. Alternatively, the insulating member can be manufactured by a laser direct structuring method. Alternatively, the wiring member can be manufactured using a conductive adhesive applied to the insulating member.

[0013] According to another aspect of the embodiment, the terminal can be configured to be connected to the positive electrode of the electrode assembly.

[0014] According to one embodiment of the present invention, a battery is provided, the battery comprising: a housing including an opening; an electrode assembly housed within the housing; and a cover assembly closing the opening of the housing. Furthermore, the cover assembly comprises: a cover plate coupled to the housing to cover the opening of the housing; a terminal extending through the cover plate, a first end of the terminal being electrically connected to an electrode of the electrode assembly and a second end of the terminal protruding to the outside of the housing; an insulating member, at least a portion of which is disposed between the cover plate and the terminal to electrically insulate the cover plate and the terminal; and a wiring member electrically connecting the cover plate and the terminal.

[0015] According to one aspect of the embodiment, the wiring member may be a short-circuit propagation prevention member, with a first end of the wiring member connected to a cover plate and a second end of the wiring member connected to a terminal.

[0016] According to one embodiment of this disclosure, a battery pack is provided, comprising a plurality of batteries spaced apart from each other and arranged in at least one direction, a busbar electrically connected to the batteries, and a housing therein housing the batteries and the busbar. Furthermore, each of the batteries includes: an electrode assembly; a housing including an opening, and the electrode assembly being housed within the housing; and a cover assembly closing the opening of the housing, the cover assembly including: a cover plate coupled to the housing to cover the opening of the housing; a terminal extending through the cover plate, a first end of the terminal being electrically connected to an electrode of the electrode assembly and a second end of the terminal protruding to the outside of the housing; an insulating member, at least a portion of which is disposed between the cover plate and the terminal to electrically insulate the cover plate and the terminal; and a wiring member electrically connecting the cover plate and the terminal.

[0017] According to one aspect of the embodiment, the wiring member may be a short-circuit propagation prevention member, with a first end of the wiring member connected to a cover plate and a second end of the wiring member connected to a terminal.

[0018] According to another aspect of the embodiment, the battery pack may further include a partition wall member disposed between adjacent batteries among a plurality of batteries to electrically insulate the adjacent batteries from each other.

[0019] According to another aspect of the embodiment, the battery pack may further include a battery management device configured to detect the state of each of the batteries, and the battery management device may be electrically connected to the housing of at least one of the plurality of batteries. Attached Figure Description

[0020] The accompanying drawings illustrate embodiments of the present disclosure, and together with the detailed description of the present disclosure, aspects and features of the present disclosure are further described. The present disclosure is not limited to the embodiments depicted in the drawings.

[0021] Figure 1 This is a perspective view schematically illustrating the construction of a battery pack according to an embodiment of the present disclosure;

[0022] Figure 2 It is shown schematically. Figure 1 A perspective view of the structure of the batteries included in the battery pack;

[0023] Figure 3 It is shown schematically. Figure 2 An exploded perspective view of the structure of the cover assembly included in the battery;

[0024] Figure 4 This is a perspective view schematically illustrating an example of a wiring component;

[0025] Figure 5 This is an exploded perspective view showing a schematic construction of a battery according to another embodiment of the present disclosure;

[0026] Figure 6 This is a diagram illustrating the equivalent circuit of a battery according to an embodiment of the present disclosure;

[0027] Figure 7A This is a diagram illustrating the equivalent circuit of a battery pack comprising eight batteries according to an embodiment of the present disclosure;

[0028] Figure 7B This is an equivalent circuit diagram illustrating the mechanism used to prevent short circuit propagation in a battery pack when a short circuit occurs between adjacent batteries.

[0029] Figure 7C This is an equivalent circuit diagram illustrating the mechanism used to prevent short circuit propagation in the battery pack when a short circuit occurs between the battery casing and the battery pack housing.

[0030] Figure 8A This is a schematic diagram illustrating the construction for measuring the voltage in a battery pack, including conventional batteries; and

[0031] Figure 8B This is a schematic diagram illustrating a construction for measuring the voltage in a battery pack including a battery according to an embodiment of the present disclosure. Detailed Implementation

[0032] In the following, embodiments of this disclosure will be described in detail with reference to the accompanying drawings. The terms or words used in this specification and claims should not be interpreted according to their general or dictionary meaning, but rather based on the principle that the inventor can be his / her own lexicographer to appropriately define terms and concepts to best describe his / her invention, and should be interpreted as having meanings and concepts consistent with the technical spirit of this disclosure. The embodiments described in this specification and the constructions shown in the accompanying drawings are merely some embodiments of this disclosure and do not represent all aspects, features, and embodiments of this disclosure. Therefore, it should be understood that at the time of filing this application, various equivalents and modifications may exist to replace or modify one or more of the embodiments or features described herein.

[0033] Furthermore, when used herein, the terms “including or comprising” and / or “included or comprising” specify the presence of the mentioned shapes, quantities, steps, operations, components, elements and / or groups thereof, and are not intended to exclude the presence or addition of one or more other shapes, quantities, operations, components, elements and / or groups thereof.

[0034] Furthermore, to aid in understanding this disclosure, the accompanying drawings are not drawn to scale, and the dimensions of some components may be enlarged. Additionally, in different embodiments, the same reference numerals are assigned to the same components.

[0035] Referring to two compared elements, features, etc., as "identical" can mean that they are "substantially identical." Therefore, the term "substantially identical" can include situations where the deviation is considered low in the field, such as a deviation of less than 5%. Furthermore, if a parameter is said to be uniform over a given region, it can mean that it is uniform in terms of its average value.

[0036] Although terms like "first," "second," etc., are used to describe various components, the components are not limited to these terms. These terms are only used to distinguish one component from another, and unless otherwise specified, it should be understood that a first component can also be a second component.

[0037] Throughout this specification, unless otherwise specified, each element may be singular or plural.

[0038] When any component is set "above or below" a component, or "above or below" a component, it means not only that any component is set to contact that component, but also that another component can be inserted between that component and any component set above (or below) that component.

[0039] Furthermore, when a component is described as being “on,” “connected,” or “linked” to another component, the aforementioned components may be directly connected or linked to each other, but it should be understood that other components may be “inserted” between each component, or each component may be “connected,” “linked,” or “linked” to another component.

[0040] As used herein, the term “and / or” includes any and all combinations of one or more of the associated enumerations. Furthermore, the use of “may” in describing embodiments of this disclosure refers to “one or more embodiments of this disclosure.” Expressions such as “one or more” and “one or more” preceding a list of elements modify the entire list of elements, rather than individual elements within the list.

[0041] Throughout this specification, unless otherwise stated, when “A and / or B” is mentioned, 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 mentioned, it means above C and below D.

[0042] When a list of elements A, B, and C is specified using terms such as “at least one of A, B, and C”, “at least one selected from the group of A, B, and C”, or “at least one selected from A, B, and C”, the term 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.

[0043] The term “use” may be considered synonymous with the term “utilization”. As used herein, the terms “substantially,” “approximately,” and similar terms are used as approximate terms rather than 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.

[0044] It will be understood that although the terms first, second, third, etc., may be used herein to describe various elements, components, regions, layers, and / or portions, these elements, components, regions, layers, and / or portions should not be limited by these terms. These terms are used to distinguish one element, component, region, layer, or portion from another element, component, region, layer, or portion. Therefore, without departing from the teachings of the exemplary embodiments, the first element, component, region, layer, or portion discussed below may be referred to as a second element, component, region, layer, or portion.

[0045] For ease of description, this document uses spatially related terms such as “below,” “under,” “down,” “above,” and “above” to describe the relationship of one element or feature shown in the accompanying drawings to one or more other elements or features. It will be understood that, in addition to the orientation shown in the accompanying drawings, the spatially related terms are also intended to cover different orientations of the device in use or operation. For example, if the device in the figure is flipped, an element described as “below” or “under” other elements or features would be oriented as “above” or “above” other elements or features. Therefore, the term “below” may encompass both above and below orientations. The device may be oriented in other ways (e.g., rotated 90 degrees or otherwise), and the spatially related descriptors used herein should be interpreted accordingly.

[0046] The terminology used herein is for the purpose of describing embodiments of this disclosure and is not intended to limit this disclosure.

[0047] Figure 1 This is a perspective view schematically illustrating the construction of a battery pack according to an embodiment of the present disclosure. See also Figure 1 The battery pack 1 includes a battery 100, a battery pack casing 200, a busbar 300, and a partition wall component 400.

[0048] Battery 100 may include multiple batteries within battery pack housing 200. The multiple batteries 100 may be arranged in a row along the longitudinal or width direction of battery pack housing 200. Although Figure 1An example is shown in which eight batteries 100 are arranged in the longitudinal direction (X-axis direction) of the battery pack housing 200, but the arrangement of the multiple batteries 100 is not limited to this and can be designed to have various arrangements. For example, the multiple batteries 100 can be arranged in the Y-axis direction, two or more of the multiple batteries 100 arranged in a row in the X-axis direction can be arranged in the Y-axis direction, or two or more of the multiple batteries 100 arranged in a row in the Y-axis direction can be arranged in the X-axis direction. Alternatively, two or more of the multiple batteries 100 arranged in a row in the X-axis direction and / or Y-axis direction can be stacked and arranged in the Z-axis direction.

[0049] Figure 2 It is shown schematically. Figure 1 A perspective view of the structure of the battery 100 included in the battery pack 1. Figure 3 It is shown schematically. Figure 2 An exploded perspective view of the structure of the cover assembly 130 included in the battery 100. Figure 2 and Figure 3 The battery 100 shown is a prismatic lithium-ion secondary battery. However, the battery 100 is not limited to this. Figure 2 and Figure 3 The battery 100 is shown in a prismatic shape, but can be configured as other types or with other structures. Furthermore, the battery 100 is not limited to a prismatic shape, but can be a pouch-type or cylindrical battery.

[0050] See Figure 2 and Figure 3 The battery 100 includes an electrode assembly 110, a housing 120 that houses the electrode assembly 110, and a cover assembly 130 coupled to the housing 120 to close an opening in the housing 120.

[0051] Electrode assembly 110 includes a positive electrode, a negative electrode, and a diaphragm inserted between the positive and negative electrodes. The positive and negative electrodes can typically be polygonal sheets, and multiple positive and negative electrodes can be stacked alternately with the diaphragm acting as an insulator between them. However, this disclosure is not limited to this configuration, and positive and negative electrodes of predetermined lengths can be wound after the diaphragm is inserted.

[0052] positive electrode

[0053] The positive electrode of battery 100 may include a current collector and a positive electrode active material layer formed on the current collector. The positive electrode active material layer may include a positive electrode active material and may further include a binder and / or a conductive material. Furthermore, the positive electrode may further include an additive used as a sacrificial positive electrode.

[0054] As the positive electrode active material, compounds capable of reversible lithium insertion and extraction (lithiation intercalation compounds) can be used. Specifically, one or more composite oxides of lithium with metals selected from cobalt, manganese, nickel, and combinations thereof can be used.

[0055] The composite oxide can be a lithium transition metal composite oxide, such as lithium nickel oxides, lithium cobalt oxides, lithium manganese oxides, lithium iron phosphate compounds, cobalt-free nickel-manganese oxides, and combinations thereof. As an example, a compound represented by any of the following chemical formulas can be used: Li a A 1-b X b O 2-c D c (0.90≤a≤1.8, 0≤b≤0.5, 0≤c≤0.05), Li a Mn 2-b X b O 4-c D c (0.90≤a≤1.8, 0≤b≤0.5, 0≤c≤0.05), Li a Ni 1-b-c Co b X c O 2-α D α (0.90≤a≤1.8, 0≤b≤0.5, 0≤c≤0.5, 0<α<2), Li a Ni 1-b-c Mn b X c O 2-α D α (0.90≤a≤1.8, 0≤b≤0.5, 0≤c≤0.5, 0<α<2), Li a Ni b Co c L 1 d G e O2(0.90≤a≤1.8, 0≤b≤0.9, 0≤c≤0.5, 0≤d≤0.5, 0≤e≤0.1), Li a NiG b O2(0.90≤a≤1.8, 0.001≤b≤0.1), Li a CoG b O2(0.90≤a≤1.8, 0.001≤b≤0.1), Li a Mn 1-b G b O2(0.90≤a≤1.8, 0.001≤b≤0.1), Li aMn2G b O4(0.90≤a≤1.8, 0.001≤b≤0.1), Li a Mn 1-g G g PO4(0.90≤a≤1.8, 0≤g≤0.5), Li (3-f) Fe2(PO4)3 (0≤f≤2) and Li a FePO4 (0.90≤a≤1.8). In these chemical formulas, A is Ni, Co, Mn or a combination thereof; X is Al, Ni, Co, Mn, Cr, Fe, Mg, Sr, V, rare earth elements or a combination thereof; D is O, F, S, P or a combination thereof; G is Al, Cr, Mn, Fe, Mg, La, Ce, Sr, V or a combination thereof; and L1 is Mn, Al or a combination thereof.

[0056] In some examples, the positive electrode active material can be a high-nickel positive electrode active material, based on 100 mol% of metals other than lithium in lithium transition metal composite oxides. This high-nickel positive electrode active material has a nickel content of 80 mol% or more, 85 mol% or more, 90 mol% or more, 91 mol% or more, or 94 mol% or more and 99 mol% or less. High-nickel-based positive electrode active materials can provide high capacity and are therefore suitable for use in high-capacity, high-density secondary batteries.

[0057] Based on a 100 wt% positive electrode active material layer, the amount of positive electrode active material can be from 90 wt% to 99.5 wt%. Based on a 100 wt% positive electrode active material layer, the amount of each of the binder and conductive material can be from 0.5 wt% to 5 wt%.

[0058] The binder is used to adhere the positive electrode active material particles to each other and also to the positive electrode active material to the current collector. Representative examples of binders include polyvinyl alcohol, carboxymethyl cellulose, hydroxypropyl cellulose, diacetyl cellulose, polyvinyl chloride, carboxylated polyvinyl chloride, polyvinyl fluoride, ethylene oxide-containing polymers, polyvinylpyrrolidone, polyurethane, polytetrafluoroethylene, polyvinylidene fluoride, polyethylene, polypropylene, styrene-butadiene rubber, (meth)acrylated styrene-butadiene rubber, epoxy resin, (meth)acrylate resin, polyester resin, nylon, etc. However, this disclosure is not limited to these examples.

[0059] The conductive material is used to endow the electrode with conductivity, and any material that does not cause chemical changes and has electronic conductivity can be used in the constructed battery. Examples of the conductive material include: carbonaceous materials such as natural graphite, artificial graphite, carbon black, acetylene black, Ketjen black, carbon fiber, carbon nanofiber, and carbon nanotube; metallic materials containing copper, nickel, aluminum, silver, etc. in the form of metal powder or metal fiber; conductive polymers such as polyphenylene derivatives; and mixtures thereof.

[0060] Aluminum can be used as the current collector, but the current collector is not limited thereto.

[0061] negative electrode

[0062] The negative electrode of the battery 100 includes a current collector and a negative electrode active material layer located on the current collector. The negative electrode active material layer may further include a binder and / or a conductive material. For example, the negative electrode active material layer may include 90 wt% to 99 wt% of the negative electrode active material, 0.5 wt% to 5 wt% of the binder, and 0 wt% to 6 wt% of the conductive material.

[0063] The negative electrode active material includes a material capable of reversibly inserting / extracting lithium ions, lithium metal, an alloy of lithium and a metal, a material capable of doping and dedoping lithium, or a transition metal oxide.

[0064] The material capable of reversibly inserting / extracting lithium ions may be a carbonaceous negative electrode active material, such as crystalline carbon, amorphous carbon, or a combination thereof. Examples of crystalline carbon may include graphite (such as amorphous, plate-like, flaky, spherical, or fibrous natural graphite or artificial graphite), and examples of amorphous carbon may include soft carbon or hard carbon, mesophase pitch carbide, or calcined coke, etc.

[0065] As the alloy of lithium and a metal, an alloy of lithium and 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.

[0066] As the material capable of doping and dedoping lithium, a Si-based negative electrode active material or a Sn-based negative electrode active material can be used. The Si-based negative electrode active material may include silicon, a silicon-carbon composite, SiO x (0 < x < 2), a Si-Q alloy, or a combination thereof. The Sn-based negative electrode active material may include Sn, SnO2, a Sn-based alloy, or a combination thereof. In the chemical formula Si-Q, 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.

[0067] The silicon-carbon composite can be a composite of silicon and amorphous carbon. According to embodiments, 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) therein aggregated silicon primary particles and an amorphous carbon coating (shell) on the surface of the secondary particles. The amorphous carbon can also be located between the silicon primary particles; for example, the silicon primary particles can be coated with amorphous carbon. The secondary particles can be dispersed in an amorphous carbon matrix.

[0068] The silicon-carbon composite may further include crystalline carbon. The silicon-carbon composite may include, for example, a core comprising crystalline carbon and silicon particles, and an amorphous carbon coating on the surface of the core.

[0069] Si-based or Sn-based negative electrode active materials can be used in combination with carbon-based negative electrode active materials.

[0070] The binder is used to adhere the negative electrode active material particles to each other and also to the negative electrode active material to the current collector. Non-aqueous binders, aqueous binders, dry binders, or combinations thereof can be used as binders.

[0071] 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.

[0072] 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, polydichloroethanol, 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.

[0073] When using an aqueous binder as the negative electrode binder, it 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. As an alkali metal, Na, K, or Li may be used.

[0074] Dry binders can be fibrous polymeric materials, such as polytetrafluoroethylene, polyvinylidene fluoride, polyvinylidene fluoride-hexafluoropropylene copolymer, polyethylene oxide, or combinations thereof.

[0075] Conductive materials are used to impart conductivity to electrodes, and any material that does not cause chemical changes and has electronic conductivity can be used in the constructed battery. Examples of conductive materials include: carbon-based materials such as natural graphite, synthetic graphite, carbon black, acetylene black, Ketjen black, carbon fibers, carbon nanofibers, and carbon nanotubes; metallic materials containing copper, nickel, aluminum, silver, etc., in the form of metal powders or metal fibers; conductive polymers such as polyphenylene derivatives; and mixtures thereof.

[0076] The negative electrode current collector can be selected from copper foil, nickel foil, stainless steel foil, titanium foil, nickel foam, copper foam, polymer substrate coated with conductive metal, and combinations thereof.

[0077] electrolyte

[0078] The electrolyte used in battery 100 may include non-aqueous organic solvents and lithium salts.

[0079] Non-aqueous organic solvents act as a medium through which ions participating in the electrochemical reactions of the battery move.

[0080] Non-aqueous organic solvents can be carbonates, esters, ethers, ketones or alcohols, aprotic solvents or combinations thereof.

[0081] Examples of carbonate solvents that can be used include dimethyl carbonate (DMC), diethyl carbonate (DEC), dipropyl carbonate (DPC), methyl propyl carbonate (MPC), ethyl propyl carbonate (EPC), methyl ethyl carbonate (MEC), ethylene carbonate (EC), propylene carbonate (PC), butyl carbonate (BC), etc.

[0082] Examples of ester solvents that can be used include methyl acetate, ethyl acetate, n-propyl acetate, dimethyl acetate, methyl propionate, ethyl propionate, decanoic acid lactone, mevalonate lactone, and valonate lactone.

[0083] Examples of usable ether solvents include dibutyl ether, tetraethylene glycol dimethyl ether, diethylene glycol dimethyl ether, dimethoxyethane, 2-methyltetrahydrofuran, 2,5-dimethyltetrahydrofuran, and tetrahydrofuran. Additionally, cyclohexanone and the like can be used as ketone solvents. As alcohol solvents, ethanol and isopropanol, etc., can be used, and as aprotic solvents, nitrile solvents (such as R-CN (where R is a straight-chain, branched, or cyclic hydrocarbon group having 2 to 20 carbon atoms, and may include double bonds, aromatic rings, or ether groups); amides (such as dimethylformamide); dioxolane (such as 1,3-dioxolane and 1,4-dioxolane, etc.); and sulfolane.

[0084] Non-aqueous organic solvents can be used alone or in combination of two or more.

[0085] Furthermore, when using carbonate solvents, cyclic carbonates and chain carbonates can be mixed and used, and cyclic carbonates and chain carbonates can be mixed in volume ratios of 1:1 to 1:9.

[0086] Lithium salts are substances dissolved in organic solvents that act as a source of lithium ions in batteries to enable the basic operation of secondary batteries. Lithium salts facilitate the movement of lithium ions between the positive and negative electrodes. Representative examples of lithium salts can include LiPF6, LiBF4, LiSbF6, LiAsF6, LiClO4, LiAlO2, LiAlCl4, LiPO2F2, LiCl, LiI, LiN(SO3C2F5)2, Li(FSO2)2N (lithium bis(fluorosulfonyl)imide (LiFSI)), LiC4F9SO3, and LiN(C x F 2x+1 SO2)(C y F 2y+1 One or more of the following: (SO2) (x and y are integers from 1 to 20), lithium trifluoromethanesulfonate, lithium tetrafluoroethanesulfonate, lithium difluorobis(oxalate)phosphate (LiDFOB), and lithium bis(oxalate)borate (LiBOB).

[0087] diaphragm

[0088] The battery 100 may have a separator between the positive and negative electrodes. As the separator, multilayers of polyethylene, polypropylene, polyvinylidene fluoride, or two or more thereof may be used. Furthermore, hybrid multilayers may be used, such as two-layer polyethylene / polypropylene separators, three-layer polyethylene / polypropylene / polypropylene separators, and three-layer polypropylene / polypropylene / polypropylene separators. The separator may include a porous substrate and a coating on one or both surfaces of the porous substrate, the coating comprising organic materials, inorganic materials, or combinations thereof.

[0089] The porous substrate can be a polymer film formed 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, TEFLON® and polytetrafluoroethylene, or copolymers or mixtures of two or more thereof.

[0090] Organic materials may include polyvinylidene fluoride vinyl polymers or (meth)acrylate-based polymers. 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. Organic and inorganic materials may exist as a mixture in a single coating, or as a coating in which organic and inorganic materials are stacked.

[0091] The housing 120 forms the exterior of the battery 100 and may be formed of a conductive metal such as aluminum, aluminum alloy, or nickel-plated steel. The housing 120 provides space therein to house the electrode assembly 110.

[0092] In the prismatic battery 100, the housing 120 has a generally cuboid shape. The housing 120 may include, for example, a front and rear plate facing the X-axis, a left and right side plate facing the Y-axis, and a bottom plate facing the Z-axis. Furthermore, the upper surface facing the Z-axis may be open. A cover assembly 130 is disposed on the open upper surface of the housing 120. The front, rear, left, right, and bottom plates may each be formed as separate plate-like members and may be connected at joints. However, this disclosure is not limited thereto, and two or more plates may be formed by bending a large-area plate by 90 degrees.

[0093] The cover assembly 130 may include a cover plate 131 that covers the opening (i.e., the upper surface of the housing 120). The cover plate 131 may be made of a thin sheet. The cover plate 131 may be made of a conductive material such as copper, nickel, or aluminum. An insulating member may be installed between the cover plate 131 and the electrode assembly 110. The cover plate 131 may be connected to the opening of the housing 120 by various types of connection methods such as welding, bolting, or assembly.

[0094] A vent 132 can be formed in the cover plate 131. For example, a vent hole can be formed in the cover plate 131. The vent 132 can open and close in response to changes in the internal pressure of the housing 120. That is, during normal operation of the battery 100, the vent 132 can be closed to prevent leakage of electrolyte or the like from inside the housing 120 and to prevent moisture or foreign objects from entering the interior of the housing 120. On the other hand, the vent 132 can be opened, for example, during thermal runaway of the battery 100, to allow flames, gases, and fumes generated inside the housing 120 to be discharged to the outside of the housing 120.

[0095] An electrolyte inlet 133 may also be formed in the cover plate 131, and electrolyte can be injected into the housing 120 through the electrolyte inlet 133. After the electrolyte is injected, the electrolyte inlet 133 can be sealed with a sealing cap. The electrolyte inlet 133 may be located at a predetermined distance from the vent port 132.

[0096] The cover assembly 130 may include a pair of terminals 134a and 134b. For this purpose, through-holes through which terminals 134a and 134b can pass can be formed in the cover plate 131. The inner ends of terminals 134a and 134b passing through the cover plate 131 can be electrically connected to the positive and negative electrodes of the electrode assembly 110, and the outer ends of terminals 134a and 134b can protrude outward from the cover plate 131, for example, to the outside of the housing 120. Terminals 134a and 134b can serve as the positive and negative electrode terminals of the battery 100.

[0097] In the example, each of terminals 134a and 134b can be electrically connected to a positive or negative current collector soldered to the stacked uncoated positive or negative portion. In this case, each of terminals 134a and 134b can be soldered through its lower surface to face the upper surface of the positive or negative current collector.

[0098] The outer peripheral surface of each of the outer ends of terminals 134a and 134b may be threaded and may be secured to cover plate 131 with a nut. However, this disclosure is not limited thereto, and terminals 134a and 134b may have a riveted structure and may be riveted to cover plate 131 or may be directly welded to cover plate 131.

[0099] The cover assembly 130 may include insulating members 135a and 135b disposed between the cover plate 131 and the terminals 134a and 134b. Each of the insulating members 135a and 135b may be fixed between the cover plate 131 and the terminals 134a and 134b by means of press fitting, injection molding, or bonding. The insulating members 135a and 135b block the electrical connection between the cover plate 131 and the terminals 134a and 134b. In addition, by blocking the physical contact between the cover plate 131 and the terminals 134a and 134b, the insulating members 135a and 135b prevent moisture or foreign matter from entering the space between the cover plate 131 and the terminals 134a and 134b.

[0100] Insulating members 135a and 135b may have a predetermined thickness and be made of a material with insulating properties, and there are no particular limitations on the type or thickness of the material. According to an embodiment, insulating members 135a and 135b may be formed of insulating plastics such as polyethylene (PE) or polypropylene (PP) with high resistivity, insulating rubber such as polyethylene terephthalate (PET) rubber, or insulating ceramics.

[0101] According to an embodiment, the cover assembly 130 may further include a wiring member 136. The wiring member 136 is used to electrically connect the cover plate 131 and the terminal 134a, with one end of the wiring member 136 electrically connected to the cover plate 131 and the other end of the wiring member 136 electrically connected to the terminal 134a. Therefore, the wiring member 136 can electrically connect the cover plate 131 and the housing 120 connected thereto to one of the electrodes (e.g., the positive electrode) of the secondary battery 100 via the positive electrode terminal 134a. In this case, the wiring member 136 may not be installed between the cover plate 131 and the negative electrode terminal 134b. However, in other embodiments, the wiring member 136 may be provided between the cover plate 131 and the negative electrode terminal 134b, rather than between the cover plate 131 and the positive electrode terminal 134a.

[0102] Therefore, the wiring member 136, the cover plate 131, and the housing 120 are electrically connected to the positive electrode of the battery 100. Since the cover plate 131 and the housing 120 are electrically connected to the positive electrode of the battery 100 when the battery 100 is operating, current flows through the cover plate 131 and the housing 120, thereby suppressing corrosion of the cover plate 131 and the housing 120 by electrolytes or moisture. Furthermore, when measuring the voltage of the battery 100, the measuring terminal does not necessarily need to be electrically connected to the terminal 134a, but can be electrically connected to the housing 120. Therefore, the limitations on the installation of the circuit for measuring the voltage of the battery 100 can be reduced, as will be described below.

[0103] Figure 4 This is a perspective view schematically illustrating an example of the wiring member 136. According to an embodiment, the wiring member 136 can be a short-circuit propagation prevention member that, like a fuse, blocks the flow of current under certain conditions. For example, the wiring member 136 can be configured to cut off the flow of current when the voltage across its terminals becomes greater than a reference voltage, or when a current higher than a reference current is present. However, the type of wiring member 136 is not limited, and there are no particular restrictions on its type, as long as it prevents the flow of current when a voltage higher than a reference value is applied or when a current higher than a reference value is present. Furthermore, there are no particular restrictions on the material of the wiring member 136, and the wiring member 136 can be formed of copper, zinc, or aluminum alloys, etc.

[0104] The wiring member 136 can be disposed between the cover plate 131 and the terminal 134a, and can be connected to the insulating member 135a. In this case, when one end of the wiring member 136 is electrically connected to the cover plate 131 and the other end is electrically connected to the terminal 134a, there are no particular limitations on the type, arrangement, and manufacturing method of the wiring member 136. For example, as... Figure 4As shown, the wiring member 136 may be a fuse component connected to the insulating member 135a. In this case, the insulating member 135a, including the wiring member 136, may be manufactured by an insert injection method (such as plastic insert injection), but this disclosure is not limited thereto. It will be apparent to those skilled in the art that... Figure 4 The arrangement of the wiring member 136 shown is merely exemplary. As another example, the wiring member 136 can be imprinted onto the insulating member 135a using a laser direct structuring (LDS) method. That is, a predetermined pattern can be created on the insulating member 135a using a laser, and the wiring member 136 can be manufactured by coating the pattern with a conductive metal or the like. As yet another example, the wiring member 136 can be formed using a conductive adhesive (or conductive bonding agent). That is, the wiring member 136 can be formed by providing a fuse pattern on the insulating member 135a with a conductive adhesive and then curing the fuse pattern.

[0105] Figure 5 This is an exploded perspective view illustrating a schematic construction of a battery according to another embodiment of the present disclosure. See also Figure 5 The battery 500 includes an electrode assembly 510, a housing 520 that houses the electrode assembly 510 and has openings on the left and right sides, and a pair of cover assemblies 530a and 530b respectively attached to the sides of the housing 520 to close the openings.

[0106] Figure 5 500 batteries and Figure 2 The difference with battery 100 is that electrode terminals 534a and 534b are located on both sides of housing 520. Therefore, the arrangement of electrode current collectors in electrode assembly 510 is also different. Figure 2 The electrode assembly 110, and the housing 520 and Figure 2 The location and number of openings in the housing 120 may vary. In the following text, we will focus primarily on... Figure 2 The differences between cover assemblies 530a and 530b and those of battery 100 cover assembly 130 are described in relation to the differences in cover assembly 130 of battery 100. Parts not specifically described herein can be referred to above. Figure 2 and Figure 3 The parts described are the same, or can be modified to correspond to the differences.

[0107] The cover assembly may include a pair of cover assemblies, namely a right cover assembly 530a and a left cover assembly 530b. The right cover assembly 530a may include a right cover plate 531a covering the opening on the right side surface (i.e., the right side surface of the housing 520). The left cover assembly 530b may include a left cover plate 531b covering the opening on the left side surface (i.e., the left side surface of the housing 520). An insulating member may be installed between each of the right cover plate 531a and the left cover plate 532b and the electrode assembly 510.

[0108] The right cover plate 531a may be provided with a vent 532. Furthermore, the right cover plate 531a may also have an electrolyte inlet 533 formed therein. However, this is exemplary, and both the vent 532 and the electrolyte inlet 533 may be provided in the left cover plate 531b, or one of the vent 532 and the electrolyte inlet 533 may be provided in the right cover plate 531a, and the other may be provided in the left cover plate 531b.

[0109] The right cover assembly 530a and the left cover assembly 530b may each have a terminal 534a or 534b. For example, the right cover plate 531a and the left cover plate 531b may each have a through hole through which the terminals 534a and 534b can pass. Specifically, the inner end of the terminal 534a passing through the through hole in the right cover plate 531a can be electrically connected to the positive electrode of the electrode assembly 510, and the terminal 534b passing through the through hole in the left cover plate 531b can be electrically connected to the negative electrode of the electrode assembly. In this case, the right terminal 534a can be used as the positive electrode of the battery 500, and the left terminal 534b can be used as the negative electrode of the battery 500. Alternatively, the battery 500 can be configured such that the right terminal 534a is used as the negative electrode of the battery 500, and the left terminal 534b is used as the positive electrode of the battery 500.

[0110] Cover assemblies 530a and 530b may include insulating members 535a and 535b disposed between the right cover plate 531a and the left cover plate 531b and the positive electrode terminal 534a and the negative electrode terminal 534b. Furthermore, cover assembly 530a may further include a wiring member (not shown) electrically connecting the right cover plate 531a and the positive electrode terminal 534a. In this case, the wiring member may be disposed between the right cover plate 531a and the positive electrode terminal 534a.

[0111] See you again Figure 1 The battery pack housing 200 can form the exterior of the battery pack 1 and can provide space therein for accommodating multiple batteries 100. According to this embodiment, the battery pack housing 200 may include a housing body 210 and a cover 220.

[0112] The outer shell 210 can be formed into a box shape with an empty interior and an open side. The cross-sectional shape of the outer shell 210 in the XY plane is not limited to a rectangle, and can be formed into various shapes, such as polygons, circles, ellipses or other shapes.

[0113] The cover 220 can be attached to the housing 210 and can close the internal space of the housing 210. In one example, the cover 220 can be formed as a generally plate-shaped cover with an open side facing the housing 210. The cover 220 can be secured to the housing 210 by various types of connection methods such as bolting, welding, or assembly.

[0114] Busbar 300 electrically connects multiple batteries 100. Busbar 300 may be disposed between cover 220 and battery 100. In some embodiments, busbar 300 may be provided as multiple busbars. Each busbar 300 may connect two or more adjacent batteries 100 in series or in parallel. In one example, the two sides of busbar 300 may be connected to the positive electrode terminal 134a of one of a pair of adjacent batteries 100 and the negative electrode terminal 134b of the other of the pair of adjacent batteries 100, respectively. Therefore, multiple batteries 100 can be connected in series through busbar 300. However, the busbar 300 is not limited to this connection form. Instead, both sides of the busbar 300 can be connected to the negative electrode terminal 134b of one of the pair of adjacent batteries 100 and the positive electrode terminal 134a of the other of the pair of adjacent batteries 100, or they can be connected to the positive or negative terminal of one of the pair of adjacent batteries 100 and the positive or negative terminal of the other of the pair of adjacent batteries 100, so as to connect multiple batteries 100 in parallel.

[0115] Busbar 300 can be formed of a conductive material such as copper, aluminum, or nickel. The specific shape of busbar 300 is not limited to... Figure 1 The shape shown is not shown. Instead, the busbar 300 can be designed to have various shapes that allow it to connect adjacent batteries 100.

[0116] Multiple busbars 300 can be supported within the housing 210 by a busbar retainer H. The busbar retainer H can be formed to have, for example, a flat plate shape. The busbar retainer H can be disposed between the cover 220 and the battery 100. The busbars 300 can be secured to the busbar retainer H by various types of connection methods such as assembly, bolting, and injection molding. The busbar retainer H can be configured to include an electrically insulating polymer composite material.

[0117] The partition wall member 400 is located in the gap between adjacent batteries 100, which are spaced apart by a predetermined distance in one direction. For example, as... Figure 1 As shown, when a gap is provided between the front panel of the housing 120 of one battery 100 and the opposite rear panel of the housing 120 of another battery 200, the partition wall member 400 can be located in the gap between the front panel and the rear panel.

[0118] If a thermal runaway event occurs in battery 100, the partition wall member 400 is used to prevent the thermal runaway from spreading to adjacent batteries 100. For this purpose, the partition wall member 400 may be formed of a material with a melting point higher than that of the material of the casing 120 or other components of battery 100. In an example embodiment, the partition wall member 400 may include a metallic material with a melting point higher than aluminum (Al) and / or a member formed of an insulating material such as ceramic.

[0119] If the battery 100 expands, the partition wall member 400 can physically absorb the increase in the size of the battery 100 to prevent damage to the battery pack 1. More specifically, when the battery 100 does not expand, the dimension of the partition wall member 400 in the X-axis direction (hereinafter referred to as "thickness") remains unchanged. On the other hand, if the battery 100 expands, the thickness of the partition wall member 400 can be reduced. Therefore, even if the battery 100 expands, the overall size of the battery pack 1 (especially the length in the X-axis direction) is maintained, thereby preventing damage to the cover plate 131 or the outer casing 210, etc.

[0120] although Figure 1 Although not shown, one or more insulating members may be disposed between the outer surface panels of the battery 100 and the housing 210. More specifically, among a plurality of batteries 100 arranged in one direction, insulating members may be disposed between the surfaces of the batteries 100 disposed at both ends and the housing 210 adjacent to the end batteries 100. For this purpose, the plurality of batteries 100 may be disposed within the housing 210 such that a predetermined gap exists between the surfaces of the batteries 100 and the housing 210. Then, the housing 120 of the battery 100 and the housing 210 may be electrically insulated from each other by the insulating members. The insulating members may be formed of a material having electrical insulating properties and a high melting point (e.g., insulating ceramics). However, this disclosure is not limited thereto.

[0121] although Figure 1 Although not shown, battery pack 1 may include a battery management system (BMS) for managing battery 100 and battery pack 1. The BMS may include detection devices, balancing devices, and control devices.

[0122] The detection device can detect the state of battery pack 1 (e.g., voltage, current, temperature, etc.) and can detect information indicating the state of battery pack 1. The detection device can detect the voltage of each of the batteries constituting battery pack 1. The detection device can also detect the current flowing through each of the batteries 100 constituting battery pack 1. The detection device can detect the ambient temperature of at least one portion of the batteries 100 and / or battery pack 1.

[0123] The balancing device can perform balancing operations on the secondary batteries 100 in battery pack 1. The control device can monitor and calculate the state of battery pack 1 (e.g., voltage, current, temperature, etc.) based on state information (e.g., voltage, current, temperature, state of charge (SOC), lifespan (state of health (SOH))) received from the detection device. Furthermore, the control device can also perform control functions (e.g., temperature control, balancing control, charge / discharge control, etc.) and protection functions (e.g., over-discharge protection, overcharge protection, overcurrent protection, short-circuit protection, fire suppression, etc.) based on the state monitoring results. In addition, the control device can perform wired or wireless communication functions with external devices of battery pack 1 (e.g., higher-level controllers, vehicles, chargers, PCS, etc.).

[0124] Figure 6 This is a diagram illustrating the equivalent circuit of a battery according to an embodiment of the present disclosure.

[0125] See Figure 6 The battery has a positive electrode electrically connected to the positive electrode terminal 134a and a negative electrode electrically connected to the negative electrode terminal 134b. Furthermore, the battery casing 120 is electrically connected to the positive electrode and the positive electrode terminal 134a via a wiring member 136 for preventing short circuits (as described above). According to this circuit configuration, when an overcurrent flows through the casing 120, the overcurrent also flows through the wiring member 136, and as a result, the short-circuit prevention function of the wiring member 136 can be activated (e.g., the fuse of the wiring member 136 blows), thereby blocking the current between the casing 120 and the positive electrode terminal 134a.

[0126] Figure 7A This is a diagram illustrating the equivalent circuit of a battery pack including eight batteries according to an embodiment of the present disclosure. Figure 7A The battery pack in the equivalent circuit shown can be Figure 1 The battery pack shown.

[0127] See Figure 7A In the equivalent circuit of the battery pack, eight batteries 100A to 100H can be connected in series with each other via busbar 300. Furthermore, as described above, the casings 120A to 120H of each of the eight batteries 100A to 100H are electrically connected to the positive electrode of each of the batteries 100A to 100H via protective wiring members 136A to 136H.

[0128] Figure 7B This is an equivalent circuit diagram illustrating the mechanism used to prevent short circuit propagation in a battery pack when a short circuit occurs between adjacent batteries. Figure 7B This is a case where the third battery 100C and the fourth battery 100D are short-circuited to each other.

[0129] See Figure 7BWhen the third battery 100C and the fourth battery 100D are short-circuited to each other, an overcurrent (indicated by the dashed line) flows through the housing 120C of the third battery 100C and the housing 120D of the fourth battery 100D. As a result, the overcurrent flows through the wiring member 136C of the third battery 100C and the wiring member 136D of the fourth battery 100D, and at least one of the wiring members 136C and 136D can be disconnected to prevent the overcurrent from flowing through the housings 120C and 120D. Therefore, the extension of the short-circuit event to the other batteries 100A, 100B, and 100E to 100H in the battery pack can be prevented or suppressed.

[0130] Figure 7C This is an equivalent circuit diagram illustrating the mechanism used to prevent short circuit propagation in the battery pack when a short circuit occurs between the battery casing and the battery pack housing. Figure 7C This refers to a short circuit between the casing 120C of the third battery 100C and the casing 120G of the seventh battery 100G and the battery pack outer casing 200. See [link / reference] Figure 7C When the casings 120C and 120G of each of the third battery 100C and the seventh battery 100G are short-circuited with the battery pack casing 200, an overcurrent (indicated by the dashed line) flows through the casing 120C of the third battery 100C and the battery pack casing 200, as well as the casing 120G of the seventh battery 100G and the battery pack casing 200. As a result, the overcurrent flows through the wiring member 136C of the third battery 100C and the wiring member 136G of the seventh battery 100G, and at least one of the wiring members 136C and 136G can be disconnected to prevent the overcurrent from flowing through the casings 120C and 120G and the battery pack casing 200. Therefore, the propagation of the short-circuit event to the other batteries 100A, 100B, and 100H in the battery pack can be prevented or suppressed.

[0131] Figure 8A and Figure 8B This is a schematic diagram illustrating the construction used to measure the voltage in a battery pack, where Figure 8A It is a battery pack that includes traditional batteries and Figure 8B It is a battery pack that includes the battery according to embodiments of this disclosure. Here, Figure 8A and Figure 8B The battery pack is equipped with Figure 1 The battery pack is constructed as shown, and each battery is connected in series via a busbar 300.

[0132] See Figure 8AFor battery packs that include conventional batteries, voltage is typically measured via busbars connecting adjacent batteries. In this case, the measurement points used to measure the voltage, i.e., the contacts V1 to V8 electrically connected to the BMS, need to be separated and located on opposite sides of the battery pack. As a result, when components including the circuitry for measuring the BMS voltage, i.e., the circuitry for connecting the BMS and contacts V1 to V8, are installed within the battery pack, this design requires a complex mounting structure.

[0133] See Figure 8B For a battery pack including a battery according to an embodiment of the present disclosure, the positive electrode of the battery is electrically connected to the casing, such that the measurement points for measuring voltage, i.e., the contact portions V1 to V8 electrically connected to the BMS, can all be located on the same side of the battery pack. As a result, when components including a circuit for measuring the voltage of the BMS, i.e., a circuit for connecting the BMS and the contact portions V1 to V8, are installed in the battery pack, a simple mounting structure can be used.

[0134] According to embodiments of this disclosure, an insulating member is inserted between the battery casing and the electrode terminals, and the battery casing and the electrode terminals are electrically connected to each other via a wiring member, thereby preventing corrosion of the casing. Furthermore, since the wiring member is a short-circuit propagation prevention member, it can effectively suppress or prevent short circuits from spreading to the entire battery pack, even when a high current flows through any cell in the battery pack. Additionally, a battery management device with a simple structural construction can measure the electrical characteristics of the batteries by directly connecting all or part of the multiple cells constituting the battery pack to the casing.

[0135] However, the effects obtained through this disclosure are not limited to those described above, and those skilled in the art will clearly understand from the description herein other technical effects not mentioned.

[0136] Although the invention has been described with reference to embodiments shown in the accompanying drawings, which are merely exemplary, those skilled in the art will understand that various modifications and other equivalent embodiments are possible.

Claims

1. A cover assembly for a battery, the cover assembly comprising: A cover plate is configured to cover an opening in the housing of the battery, the housing accommodating electrode assemblies; A terminal extending through the cover plate, a first end of the terminal being configured to be electrically connected to an electrode of the electrode assembly, and a second end of the terminal being configured to protrude to the outside of the housing; An insulating member, at least a portion of which is disposed between the cover plate and the terminal to electrically insulate the cover plate and the terminal; as well as A wiring component that electrically connects the cover plate and the terminal.

2. The cover assembly of claim 1, wherein the wiring member is a short-circuit propagation prevention member, a first end of the wiring member is connected to the cover plate and a second end of the wiring member is connected to the terminal.

3. The cover assembly according to claim 2, wherein the wiring component is a fuse component.

4. The cover assembly of claim 2, wherein the wiring member is engaged with the surface of the insulating member.

5. The cover assembly of claim 4, wherein the insulating member is manufactured by insert injection.

6. The cover assembly of claim 4, wherein the insulating member and the wiring member are manufactured by a laser direct structuring method.

7. The cover assembly of claim 4, wherein the wiring member is manufactured using a conductive adhesive applied to the insulating member.

8. The cover assembly according to any one of claims 1 to 7, wherein the terminal is configured to be connected to the positive electrode of the electrode assembly.

9. A battery, comprising: A housing, the housing including an opening; An electrode assembly, the electrode assembly being housed within the housing; as well as A cover assembly that closes the opening of the housing. The cover assembly includes: A cover plate attached to the housing to cover the opening of the housing; A terminal extending through the cover plate, the first end of the terminal being electrically connected to an electrode of the electrode assembly and the second end of the terminal protruding to the outside of the housing; An insulating member, at least a portion of which is disposed between the cover plate and the terminal to electrically insulate the cover plate and the terminal; and A wiring component that electrically connects the cover plate and the terminal.

10. The battery of claim 9, wherein the wiring member is a short-circuit propagation prevention member, a first end of the wiring member is connected to the cover plate and a second end of the wiring member is connected to the terminal.

11. The battery of claim 10, wherein the wiring component is a fuse component.

12. The battery of claim 10, wherein the wiring member is engaged with the surface of the insulating member.

13. The battery of claim 12, wherein the insulating member is manufactured by insert injection.

14. The battery of claim 12, wherein the insulating member and the wiring member are manufactured by a laser direct structuring method.

15. The battery of claim 12, wherein the wiring member is made using a conductive adhesive applied to the insulating member.

16. The battery according to any one of claims 9 to 15, wherein the terminal is connected to the positive electrode of the electrode assembly.

17. A battery pack, comprising: A plurality of batteries, the plurality of batteries being spaced apart from each other and arranged in at least one direction; A busbar, which is electrically connected to the plurality of batteries; as well as A housing that houses the plurality of batteries and the busbar. Each of the plurality of batteries includes: Electrode assembly; A housing, the housing including an opening, and the electrode assembly being housed within the housing; and A cover assembly that closes the opening of the housing. The cover assembly includes: A cover plate attached to the housing to cover the opening of the housing; A terminal extending through the cover plate, the first end of the terminal being electrically connected to an electrode of the electrode assembly and the second end of the terminal protruding to the outside of the housing; An insulating member, at least a portion of which is disposed between the cover plate and the terminal to electrically insulate the cover plate and the terminal; and A wiring component that electrically connects the cover plate and the terminal.

18. The battery pack of claim 17, wherein the wiring member is a short-circuit propagation prevention member, a first end of the wiring member is connected to the cover plate and a second end of the wiring member is connected to the terminal.

19. The battery pack of claim 17, further comprising a partition wall member disposed between adjacent batteries among the plurality of batteries to electrically insulate the adjacent batteries from each other.

20. The battery pack of claim 17, further comprising a battery management device configured to detect the state of each of the plurality of batteries. The battery management device is electrically connected to the housing of at least one of the plurality of batteries.

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