Electrode plate, electrode assembly, and rechargeable battery including the same

Abstract

An electrode plate, an electrode assembly, and a rechargeable battery including the electrode assembly are provided. The electrode plate includes a substrate including a base layer and first and second conductive layers disposed on respective surfaces of the base layer. The active material layer is disposed on at least one surface of the substrate. At least one cut portion of the first conductive layer resulting from a cut-out of a portion of the first conductive layer penetrating the base layer is bonded to the second conductive layer.

Description

Technical Field

[0001] The present disclosure relates to an electrode plate, an electrode assembly, and a rechargeable battery including the electrode assembly. Background Art

[0002] Rechargeable batteries can be manufactured in various shapes. Among these rechargeable batteries, pouch-type batteries can include an electrode assembly with a separator as an insulator between the positive and negative electrode plates, and a thin, flexible pouch containing the electrode assembly. The pouch can accommodate the electrode assembly in its interior space.

[0003] The electrode assembly of a rechargeable battery can be roughly divided into a wound type and a stacked type based on its structure. Based on its structural safety and space utility, the stacked type can be widely used in small, medium and large sizes. A stacked rechargeable battery can be a stack of electrode plates and separators.

[0004] The substrate (specifically, the current collecting layer) of the electrodes (specifically, the positive and negative electrodes) used in rechargeable batteries can generally be a conductive thin film such as copper, aluminum, nickel (Ni), or stainless steel (SUS). For example, in the case of commercially available lithium-ion batteries, a copper foil current collecting layer can be used for the negative electrode, and an aluminum foil current collecting layer can be used for the positive electrode.

[0005] Recently, in order to reduce manufacturing costs and lighten the weight of rechargeable batteries, the entire current collecting layer is not only made of a metal such as copper or aluminum, but also a composite substrate having metal layers coated on both sides of a polymer layer may be applied.

[0006] The composite substrate may have metal layers disposed on both sides of the polymer layer, and the polymer layer may have low electrical conductivity. Therefore, the metal layers on both sides may not have electrical conductivity to each other. Summary of the Invention

[0007] One or more embodiments provide an electrode plate for achieving conductivity between adjacent electrode plates, an electrode assembly, and a rechargeable battery including the electrode assembly.

[0008] According to one or more embodiments, an electrode plate includes a substrate including a base layer, and first and second conductive layers disposed on respective surfaces of the base layer. An active material layer is disposed on at least one surface of the substrate. At least one cut portion of the first conductive layer, resulting from a cut that penetrates a portion of the first conductive layer through the base layer, is bonded to the second conductive layer.

[0009] The substrate may include: a current collector having at least one surface on which the active material layer is disposed; and an uncoated region extending from the current collector, the cutout being disposed in the uncoated region.

[0010] The cutouts may be provided in the uncoated area adjacent to the current collector.

[0011] The base layer may include polyethylene terephthalate (PET).

[0012] The base layer may include at least one of polyamide, polyimide, polybutylene terephthalate, polyethylene naphthalate, polycarbonate, polyethylene, polypropylene, ethylene-propylene copolymer, acrylonitrile-butadiene-styrene copolymer, polyvinyl alcohol, polystyrene, polyvinyl chloride, polyvinylidene fluoride, polytetrafluoroethylene, sodium polystyrene sulfonate, polyacetylene, silicone rubber, polyformaldehyde, polyphenylene ether, polyphenylene sulfide, polyethylene glycol, polysulfur nitride, polyphenylene, polypyrrole, polyaniline, polythiophene, polypyridine, cellulose, starch, protein, epoxy resin, phenolic resin, derivatives of the above materials, cross-linked bodies of the above materials and copolymers of the above materials.

[0013] The base layer may further include an additive, and the additive may include at least one of a metallic material and an inorganic non-metallic material.

[0014] The first and second conductive layers may include aluminum.

[0015] The first conductive layer and the second conductive layer may include at least one of a metal material, a carbon-based conductive material, and a conductive polymer material.

[0016] According to one or more embodiments, an electrode assembly includes a plurality of electrode plates and a separator. The plurality of electrode plates are stacked with the separator located therebetween. The plurality of electrode plates each include a substrate and an active material layer, wherein the substrate includes a base layer and a first conductive layer and a second conductive layer disposed on respective sides of the base layer. The active material layer is disposed on a portion of the substrate. At least one incision is formed in a portion of the first conductive layer that penetrates the base layer, and a cut portion of the first conductive layer resulting from the incision is bonded to the second conductive layer.

[0017] The substrate may include: a current collector having at least one surface on which the active material layer is provided; and an uncoated region extending from the current collector to the outside, the cutout being provided in the uncoated region.

[0018] The cutouts may be provided in the uncoated area adjacent to the current collector.

[0019] The electrode plate may include a first electrode plate and a second electrode plate.

[0020] The electrode plate may include two or more first electrode plates and two or more second electrode plates, wherein the uncoated regions of the two or more first electrode plates and the uncoated regions of the two or more second electrode plates are respectively coupled to each other in a top-down direction.

[0021] The base layer may include polyethylene terephthalate (PET).

[0022] The base layer may include at least one of polyamide, polyimide, polybutylene terephthalate, polyethylene naphthalate, polycarbonate, polyethylene, polypropylene, ethylene-propylene copolymer, acrylonitrile-butadiene-styrene copolymer, polyvinyl alcohol, polystyrene, polyvinyl chloride, polyvinylidene fluoride, polytetrafluoroethylene, sodium polystyrene sulfonate, polyacetylene, silicone rubber, polyformaldehyde, polyphenylene ether, polyphenylene sulfide, polyethylene glycol, polysulfur nitride, polyphenylene, polypyrrole, polyaniline, polythiophene, polypyridine, cellulose, starch, protein, epoxy resin, phenolic resin, derivatives of the above materials, cross-linked bodies of the above materials and copolymers of the above materials.

[0023] The base layer may further include an additive, and the additive includes at least one of a metallic material and an inorganic non-metallic material.

[0024] The first and second conductive layers may include aluminum.

[0025] The first conductive layer and the second conductive layer may include at least one of a metal material, a carbon-based conductive material, and a conductive polymer material.

[0026] One or more embodiments provide a rechargeable battery including an electrode assembly and a case for accommodating the electrode assembly.

[0027] According to some embodiments, an electrode plate included in an electrode assembly may include a substrate in which a cutout of a first conductive layer is bonded to a cutout portion of a second conductive layer. Thus, respective surfaces of the substrate may be electrically connected to each other, such that the entire electrode assembly may be electrically connected by bonding to the substrate.

[0028] In this way, the electrode assembly according to one or more embodiments may not need to perform the conductive process of folding foils and inserting them one by one between electrode plates as in the prior art. Therefore, the manufacturing time can be shortened and the manufacturing cost can also be reduced. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] The accompanying drawings attached to the specification illustrate embodiments of the present disclosure and, together with the detailed description of the present disclosure, further describe aspects and features of the present disclosure. Therefore, the present disclosure should not be interpreted as being limited to the accompanying drawings.

[0030] Figure 1 A perspective view illustrating a rechargeable battery in which an electrode plate and an electrode assembly including the electrode plate may be installed according to one or more embodiments.

[0031] Figure 2 A cross-sectional view is shown of electrode plates coupled to each other according to some embodiments.

[0032] Figure 3 According to an exemplary embodiment, Figure 1 A perspective view of an aspect of an electrode plate of a rechargeable battery.

[0033] Figure 4 Shown Figure 3 Bottom view of the electrode plate.

[0034] Figure 5 A cross-sectional view is shown of a process involving manufacturing an electrode plate using a punching apparatus according to one or more embodiments.

[0035] Figure 6 is a cross-sectional view illustrating a cut portion of a first conductive layer and a base layer perforated by a perforating device according to some embodiments.

[0036] Figure 7 is a cross-sectional view showing that a cut portion of a first conductive layer is bonded to a second conductive layer.

[0037] Figure 8 A cross-sectional view is shown of a process involving manufacturing an electrode plate by using a punching apparatus according to one or more embodiments. DETAILED DESCRIPTION

[0038] Hereinafter, embodiments of the present disclosure will be described more fully with reference to the accompanying drawings. As will be appreciated by those skilled in the art, the described embodiments may be modified in various ways without departing from the scope of the disclosed features or claims. The drawings and description are to be considered illustrative rather than restrictive in nature.

[0039] If “include and include” and / or its variations are used in this specification, it may indicate the existence of the mentioned shapes, quantities, steps, operations, components, elements and / or groups thereof, and may not exclude the existence or addition of one or more other shapes, quantities, operations, components, elements and / or groups.

[0040] To help understand the disclosure, the accompanying drawings may not be drawn to scale, but rather the sizes of some components may be exaggerated. In another embodiment, the same reference numerals may be assigned to the same components.

[0041] A statement that two compared objects are "the same" can mean "substantially the same." Thus, substantially the same can include, for example, a deviation of less than 5%, which is considered low in the industry. Uniformity of a parameter in a given area can mean uniformity from an average perspective.

[0042] Although the first, second, etc. are used to describe various components, the components may not be limited by these terms. These terms are only used to distinguish one component from another component, and unless specifically stated otherwise, the first component may also be the second component.

[0043] Throughout the specification, unless otherwise stated, each component may be singular or plural.

[0044] Any component placed "on top (or bottom)" of a component or on the "top (or bottom)" of a component may mean that any component is placed in contact with the top (or bottom) of the component. This may mean that other structures may be placed between the component and any components placed on (or below) the component.

[0045] It should be understood that if a component is described as being “connected to” or “coupled to” another component, these components may be directly connected or connected to each other, but other components may be “interposed” between the respective components, or the respective components may be connected, coupled or connected to each other through the other components.

[0046] As used herein, the term "and / or" includes any and all combinations of one or more of the associated listed items. If describing embodiments of the present disclosure, the use of "may" refers to "one or more embodiments" of the present disclosure. Expressions such as "one or more" and "one or more" preceding a list of elements may modify the entire list of elements and may not modify the individual elements of the list.

[0047] Throughout the specification, unless specifically stated otherwise, if “A and / or B” is mentioned, it may mean A, B, or A and B, and unless specifically stated otherwise, if “C to D” is mentioned, it may mean above C and below D.

[0048] If syntax 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," and "at least one selected from A, B, and C" is used to indicate a list of elements A, B, and C, the syntax may refer to any one or more and all suitable combinations of the elements.

[0049] The term "use" may be considered synonymous with the term "utilize." As used in this specification, "substantially," "approximately," and similar terms may be used as terms of approximation rather than as terms of degree, to take into account the inherent variation in measured or calculated values ​​as will be recognized by those skilled in the art.

[0050] In this specification, the terms first, second, third, etc. can be used to describe various elements, components, regions, layers and / or parts, but elements, components, regions, layers and / or parts may not be limited by these terms. These terms can be used to distinguish one element, component, region, layer or section from another element, component, region, layer or section. Therefore, without departing from the teachings of the embodiments, the first element, first component, first region, first layer or first part discussed below can be named as the second element, second component, second region, second layer or second part.

[0051] As shown in the drawings, for ease of description, spatially relative terms such as under, below, lower, above, and upper may be used throughout this specification to describe the relationship between one element or feature and another element or feature. Spatially relative arrangements will be understood to encompass different orientations of the device during use or operation in addition to the orientation depicted in the drawings. For example, if the device in the drawings is turned over, an element described as being "below" or "below" another element could be understood to be "above" or "on top of" the other element. Thus, the term "below" encompasses both above and below.

[0052] The terms used in this specification are intended to describe the embodiments of the present disclosure but are not intended to limit the present disclosure.

[0053] Figure 1 A perspective view of a rechargeable battery 100 is shown in which electrode plates 210 , 220 and an electrode assembly 200 including the electrode plates 210 , 220 may be installed, according to one or more embodiments. Figure 2 A cross-sectional view of the electrode plates 210 , 220 of the electrode assembly 200 is shown.

[0054] Reference Figure 1 and Figure 2 , the rechargeable battery 100 may include an electrode assembly 200 and a case 300 .

[0055] The electrode assembly 200 may include electrode plates 210, 220 and a separator 230. For the purpose of explanation, the electrode plates 210, 220 may be referred to as a first electrode plate 210 and a second electrode plate 220.

[0056] The electrode assembly 200 may have a form in which a laminate including a first electrode plate 210 , a second electrode plate 220 , and a separator 230 is repeatedly wound or stacked.

[0057] For example, the electrode assembly 200 may be a stacked type in which the electrode plates 210 and 220 are arranged in a plurality of layers. Alternatively, the electrode assembly 200 may be a repeatedly wound core type. The stacked type electrode assembly 200 is discussed according to one or more embodiments.

[0058] The process for manufacturing the stacked electrode assembly 200 may generally include a primary stacking process and a secondary stacking process.

[0059] The primary stacking process may stack all positive electrodes and all negative electrodes. The all positive electrodes may include the first electrode plates 210 except the outermost first electrode plate 210A. The all negative electrodes may be the second electrode plates 220.

[0060] The secondary stacking process may stack a half-positive electrode on at least one side of each outermost side relative to the stacking direction. The half-positive electrode may be the outermost first electrode plate 210A among the first electrode plates 210 .

[0061] Figure 2 FIG. 2 shows an electrode assembly 200 in which a semi-positive electrode is stacked on an upper outermost portion of the electrode assembly 200. The semi-positive electrode may be stacked on an upper outermost portion of the electrode assembly 200 (e.g., Figure 2 ) or on each outermost portion.

[0062] The full positive electrode and the full negative electrode can be made by coating the active material on the surfaces of both sides of the substrate 201, and the semi-positive electrode can be made by providing an active material layer on one surface of the substrate 201. Known aspects of the full positive electrode, the full negative electrode, and the semi-positive electrode are not described in detail.

[0063] The separator 230 may be provided between each pair of the first electrode plate 210 and the second electrode plate 220. The separator 230 may prevent the first electrode plate 210 and the second electrode plate 220 from short-circuiting and may allow lithium ions to move. For this purpose, the separator 230 may be formed to be relatively larger than the first electrode plate 210 and the second electrode plate 220.

[0064] The material of the separator 230 may be, for example, polyethylene, polypropylene, or a composite film of polyethylene and polypropylene, but the material of the separator 230 is not intended to be limited by the example.

[0065] The separator 230 may be cut into unit lengths and arranged between each pair of the first electrode plate 210 and the second electrode plate 220, or one separator 230 may be alternately arranged in a strip shape between a plurality of pairs of the first electrode plate 210 and the second electrode plate 220. Alternatively, the separator 230 may be wound in one direction between the first electrode plate 210 and the second electrode plate 220.

[0066] The arrangement of the separator 230 may not be limited to a specific form. For example, according to some embodiments, the separator 230 is cut into unit lengths and arranged between the first electrode plate 210 and the second electrode plate 220 .

[0067] The case 300 may accommodate the electrode assembly 200. The electrode assembly 200 may be accommodated in the case 300 together with an electrolyte.

[0068] The housing 300 may be a bag type, a cylindrical type, or a prism type. The bag type housing 300 may be manufactured by bending plate-shaped external members to face each other, pressing or stretching the surface, and including a recess in the surface.

[0069] The electrode assembly 200 may be accommodated in a recess (not shown). A sealing portion may be provided on the outer circumference of the recess, and the sealing portion may be sealed by a method such as heat fusion after the electrode assembly 200 is accommodated in the recess.

[0070] Regarding the electrode plates 210 and 220 , the first electrode plate 210 may be a negative electrode and the second electrode plate 220 may be a positive electrode, or vice versa. The first and second electrode plates 210 and 220 may be electrically connected to the outside of the rechargeable battery 100 through the bar terminals 250 .

[0071] The insulating tape 240 may be attached to a portion of the strip terminal 250 contacting the housing 300. The insulating tape 240 may prevent the strip terminal 250 from being electrically conductive with the housing 300.

[0072] Figure 2 A cross-sectional view is shown of aspects of an electrode assembly according to some embodiments. Figure 3 The electrode plates 210 / 220 (such as Figure 1 100 ).

[0073] Reference Figure 2 and Figure 3 According to some embodiments, the electrode assembly 200 may include electrode plates 210 and 220, and each of the electrode plates 210 and 220 may include a substrate 201 and an active material layer 202 disposed on a portion of the substrate 201. The active material layer 202 may include an active material, a conductive material, and a binder.

[0074] With reference to the internal structure, the substrate 201 may include a base layer E and a first conductive layer F1 and a second conductive layer F2 ( Figure 5 ).

[0075] The base layer E may, for example, include polyethylene terephthalate (PET).

[0076] Optionally, the base layer E may, for example, include polyamide, polyimide, polybutylene terephthalate, polyethylene naphthalate, polycarbonate, polyethylene, polypropylene, ethylene-propylene copolymer, acrylonitrile-butadiene-styrene copolymer, polyvinyl alcohol, polystyrene, polyvinyl chloride, polyvinylidene fluoride, polytetrafluoroethylene, sodium polystyrene sulfonate, polyacetylene, silicone rubber, polyformaldehyde, polyphenylene ether, polyphenylene sulfide, polyethylene glycol, polysulfur nitride, polyphenylene, polypyrrole, polyaniline, polythiophene, polypyridine, cellulose, starch, protein, epoxy resin, phenolic resin, derivatives of the above materials, cross-linked bodies of the above materials, or copolymers of the above materials.

[0077] The base layer E may further include an additive. The additive may include at least one of a metal material or an inorganic non-metallic material. For example, the metal material additive may include at least one of aluminum, an aluminum alloy, copper, a copper alloy, nickel, a nickel alloy, titanium, a titanium alloy, iron, an iron alloy, silver, or a silver alloy.

[0078] The inorganic non-metallic material additive may include, for example, at least one of a carbon material, aluminum oxide, silicon dioxide, silicon nitride, silicon carbide, boron nitride, a silicate, or titanium oxide, and at least one of a glass material, a ceramic material, and a ceramic composite material. The carbon material additive may include, for example, at least one of graphite, superconducting carbon, acetylene black, carbon black, Ketjen black, carbon dots, carbon nanotubes, graphene, or carbon nanofibers.

[0079] The additive may further include a carbon-based material coated with a metal material, for example, at least one of graphite powder coated with nickel and carbon fiber coated with nickel.

[0080] The first conductive layer F1 and the second conductive layer F2 may include aluminum. In detail, the first conductive layer F1 and the second conductive layer F2 may include at least one of a metal material, a carbon-based conductive material, and a conductive polymer material.

[0081] With respect to the outer shape, the substrate 201 may include a current collector 201 a and an uncoated region 201 b .

[0082] The active material layer 202 may be applied to at least one surface of the current collector 201a. The current collector 201a may be, for example, in the shape of a quadrilateral plate. Figure 3 As shown in FIG, the active material layer 202 may be applied to a portion other than the edge region of the current collector 201a. Figure 3 ), the active material layer 202 may not be applied to the edge region of the current collector 201 a, but in an alternative embodiment, the active material layer 202 may be applied to the entire current collector 201 a.

[0083] The uncoated region 201b may extend from the current collector 201a to the outside. The uncoated region 201b may have, for example, a stripe shape.

[0084] The electrode plates 210 , 220 may include a first electrode plate 210 and a second electrode plate 220 , and adjacent uncoated regions 201 b of the substrates 201 of the electrode plates 210 , 220 may be bonded in a top-down direction.

[0085] As noted, if the electrode assembly 200 is a stacked type, the first electrode plates 210 and the second electrode plates 220 may be alternately stacked with the separator 230 therebetween. A plurality of first electrode plates 210 and a plurality of second electrode plates 220 may exist.

[0086] Three first electrode plates 210 and three second electrode plates 220 are arranged on the Figure 2 This exemplary illustration is not intended to limit the number of first electrode plates 210 and second electrode plates 220 in a given rechargeable battery 100 .

[0087] The uncoated regions 201b of the first electrode plate 210 may be arranged in parallel from top to bottom, and the uncoated regions 201b of the second electrode plate 220 may be arranged in parallel from top to bottom. Although not shown in the drawings, the uncoated regions 201b of the first electrode plate 210 may be spaced apart from the uncoated regions 201b of the second electrode plate 220 in the lateral direction. For example, Figure 2 , the uncoated region 201 b of the second electrode plate 220 is shown, and the uncoated region 201 b of the first electrode plate 210 may be in front of or behind the uncoated region 201 b of the second electrode plate 220 depending on the cross-sectional view.

[0088] The uncoated regions 201b of the first electrode plate 210 and the uncoated regions 201b of the second electrode plate 220 may be respectively bonded to each other by welding. For example, the uncoated regions 201b may be collected and bonded to each other by welding methods such as laser beam, resistance welding, and ultrasonic welding.

[0089] Figure 4 Shown Figure 3 The opposite surfaces of the electrode plates 210 / 220 shown in FIG. Figure 3 bottom view of the ).

[0090] In accordance with Figure 3 and Figure 4In the electrode assembly 200 of the embodiment shown in FIG, a cutout F1a cut from a portion of the first conductive layer F1 can penetrate the base layer E and can be bonded to the second conductive layer F2. The cutout F1a can be provided near the current collector 201a in the uncoated region 201b. Thus, the first conductive layer F1 can be electrically connected to the second conductive layer F2.

[0091] According to the description, if the substrate 201 of the second electrode plate 220 (e.g. Figure 2 As shown in FIG, if the substrates 201 of the first electrode plates 210 are bonded to each other (at the uncoated regions 201 b), the second electrode plates 220 can be electrically connected to each other based on the cutouts F1a. Similarly, if the substrates 201 of the first electrode plates 210 are bonded to each other (at the uncoated regions 201 b), the first electrode plates 210 can be electrically connected to each other based on the cutouts F1a.

[0092] Figures 5 to 7 Aspects of a manufacturing process of the electrode assembly 200 are shown, according to one or more embodiments. Figure 5 A cross-sectional view is shown of an exemplary process involving the manufacture of electrode plates 210 / 220 using a punching apparatus T1 . Figure 6 A cross-sectional view showing a cut portion of the first conductive layer and a base layer perforated by the perforating device T1 is shown. Figure 7 A cross-sectional view is shown in which a perforated portion of the first conductive layer F1 is bonded to the second conductive layer F2 based on the perforation.

[0093] like Figure 5 As shown in FIG, the punching device T1 may include a pin P1 and a support portion S. As shown, one side of the substrate 201 (e.g., the second conductive layer F2 in the uncoated region 201b) may be disposed on the support portion S of the punching device T1. The pin P1 of the punching device T1 may sequentially penetrate the first conductive layer F1, the base layer E, and the second conductive layer F2 of the substrate 201. The pin P1 of the punching device T1 may be housed in the support portion S during the punching process.

[0094] like Figure 6 As shown in FIG, a portion of the first conductive layer F1 may be cut. The cut portion (ie, the perforated portion) may be generated by a cut F1a. The cut F1a may penetrate the perforated base layer E.

[0095] Finally, if Figure 7 As shown in FIG, the perforated portion of the first conductive layer F1 created by the cutout F1a may be bent by an additional jig (not shown) and may be bonded to the second conductive layer F2.

[0096] Figure 8 A method for using a device having a plurality of Figure 5FIG. 1 is a cross-sectional view of a process for manufacturing electrode plates 210 / 220 using a punching device T1 and a different form of a punching device T2 .

[0097] Reference Figure 8 Substrate 201 can be perforated using a perforation device T2 comprising thin pins P2. Based on the shape of pins P2, multiple cutouts F1a can be formed in first conductive layer F1, as well as multiple perforated portions of first conductive layer F1 based on the multiple cutouts F1a. Cutouts F1a can penetrate base layer E, and the perforated portions of first conductive layer F1 created by cutouts F1a can be bonded to second conductive layer F2.

[0098] according to Figure 2 The arrangement shown in Figures 5 to 8 The substrates 201 produced in the embodiment discussed can be repeatedly stacked, and the uncoated areas 201b of the substrates 201 can be welded by a horn for ultrasonic welding. The welded portion of the uncoated area 201b can be spaced apart from the cutout F1a by a predetermined distance, but is not limited thereto. The substrates 201 are not limited to being joined to each other by ultrasonic welding. As noted, the multiple uncoated areas 201b of the multiple first electrode plates 210 can be connected to each other (e.g., welded), and the multiple uncoated portions 201b of the multiple second electrode plates 220 can be connected to each other (e.g., welded) laterally apart from the uncoated areas 201b of the first electrode plates 210.

[0099] In conventional rechargeable batteries comprising a resin-metal composite substrate, welding an uncoated area of ​​an electrode may result in contact with only one side of the metal layer. Existing solutions to this problem include processes for making the metal layer conductive, which increases the manufacturing process.

[0100] In the electrode assembly 200 manufactured according to one or more embodiments detailed herein, the cutout F1a of the first conductive layer F1 facilitates bonding the cut portion of the first conductive layer F1 to the second conductive layer F2. Thus, the sides of the substrate 201 can be electrically connected to each other, allowing the electrode plates 210 and 220 to be electrically connected separately through a common welding process, even without the need for a separate conductive process.

[0101] The electrode assembly 200 according to some embodiments may not require a conductive process for additionally folding foils and inserting them one by one between electrode plates as in the prior art method. As a result, manufacturing time can be shortened and manufacturing costs can also be reduced.

[0102] It will be understood that the disclosure is not limited to the embodiments detailed herein, but is also intended to cover various modifications and equivalent arrangements included within the features of the disclosure and within the scope of equivalence of the appended claims.

Claims

1. An electrode plate, comprising: A substrate comprising a base layer and a first conductive layer and a second conductive layer disposed on respective surfaces of the base layer; as well as an active material layer disposed on at least one surface of the substrate, Wherein, at least one cut portion of the first conductive layer, which is generated by a cut of the first conductive layer penetrating a portion of the base layer, is bonded to the second conductive layer.

2. The electrode plate according to claim 1, wherein The substrate comprises: a current collector having at least one surface on which the active material layer is disposed; and An uncoated region, the cutout being disposed in the uncoated region, the uncoated region extending from the current collector.

3. The electrode plate according to claim 2, wherein: The cutout is provided in the uncoated region near the current collector.

4. The electrode plate according to claim 1, wherein The base layer includes polyethylene terephthalate.

5. The electrode plate according to claim 1, wherein The base layer includes at least one of polyamide, polyimide, polybutylene terephthalate, polyethylene naphthalate, polycarbonate, polyethylene, polypropylene, ethylene-propylene copolymer, acrylonitrile-butadiene-styrene copolymer, polyvinyl alcohol, polystyrene, polyvinyl chloride, polyvinylidene fluoride, polytetrafluoroethylene, sodium polystyrene sulfonate, polyacetylene, silicone rubber, polyformaldehyde, polyphenylene ether, polyphenylene sulfide, polyethylene glycol, polysulfur nitride, polyphenylene, polypyrrole, polyaniline, polythiophene, polypyridine, cellulose, starch, protein, epoxy resin, phenolic resin, their derivatives, their cross-linked bodies and their copolymers. The electrode plate according to claim 1 , wherein: The base layer further includes an additive, and the additive includes at least one of a metal material and an inorganic non-metallic material.

7. The electrode plate according to claim 1, wherein: The first conductive layer and the second conductive layer include aluminum.

8. The electrode plate according to claim 1, wherein The first conductive layer and the second conductive layer include at least one of a metal material, a carbon-based conductive material, and a conductive polymer material.

9. An electrode assembly, comprising: a plurality of electrode plates and a separator, wherein the plurality of electrode plates are stacked with the separator located between the plurality of electrode plates, The plurality of electrode plates respectively include: a substrate comprising a base layer and a first conductive layer and a second conductive layer disposed on respective sides of the base layer; and an active material layer disposed on a portion of the substrate, and At least one cut is located in a portion of the first conductive layer that penetrates the base layer, wherein a cut portion of the first conductive layer created by the cut is bonded to the second conductive layer.

10. The electrode assembly according to claim 9, wherein The substrate comprises: a current collector having at least one surface on which the active material layer is disposed; and An uncoated region, in which the cutout is provided, and the uncoated region extends from the current collector to the outside.

11. The electrode assembly according to claim 10, wherein: The cutout is provided in the uncoated region near the current collector.

12. The electrode assembly according to claim 9, wherein The electrode plates include a first electrode plate and a second electrode plate.

13. The electrode assembly according to claim 12, wherein the electrode plate includes two or more first electrode plates and two or more second electrode plates, and the uncoated areas of the two or more first electrode plates and the uncoated areas of the two or more second electrode plates are respectively combined with each other in a top-down direction.

14. The electrode assembly according to claim 9, wherein The base layer includes polyethylene terephthalate.

15. The electrode assembly according to claim 9, wherein The base layer includes at least one of polyamide, polyimide, polybutylene terephthalate, polyethylene naphthalate, polycarbonate, polyethylene, polypropylene, ethylene-propylene copolymer, acrylonitrile-butadiene-styrene copolymer, polyvinyl alcohol, polystyrene, polyvinyl chloride, polyvinylidene fluoride, polytetrafluoroethylene, sodium polystyrene sulfonate, polyacetylene, silicone rubber, polyformaldehyde, polyphenylene ether, polyphenylene sulfide, polyethylene glycol, polysulfur nitride, polyphenylene, polypyrrole, polyaniline, polythiophene, polypyridine, cellulose, starch, protein, epoxy resin, phenolic resin, derivatives of the above materials, cross-linked bodies of the above materials and copolymers of the above materials.

16. The electrode assembly according to claim 9, wherein The base layer further includes an additive, and the additive includes at least one of a metal material and an inorganic non-metallic material.

17. The electrode assembly according to claim 9, wherein The first conductive layer and the second conductive layer include aluminum.

18. The electrode assembly according to claim 9, wherein The first conductive layer and the second conductive layer include at least one of a metal material, a carbon-based conductive material, and a conductive polymer material.

19. A rechargeable battery, comprising: The electrode assembly according to claim 9; as well as The shell is used to accommodate the electrode assembly.

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