Current collector for electrode having fuse-integrated uncoated part and secondary battery including same

Abstract

A current collector for an electrode having a fuse-integrated uncoated part according to an embodiment of the present invention may comprise: an electrode plate made of a metal material on which an electrode active material is applied or coated; and an uncoated part which is formed at one end of the electrode plate and in which the electrode active material does not exist, wherein the uncoated part includes a current path part having a width direction length narrower or shorter than the other parts and a cut part formed on one side of the current path part so that the uncoated part does not exist therein, and a reinforcement part provided to cover at least one of the current path part and the cut part or provided not to cover all or a part of the current path part is attached to at least one surface of both surfaces of the uncoated part.

Description

Current collector for electrode having a fuse-integrated non-conductive part and secondary battery including the same

[0001] The present invention relates to a current collector for an electrode having a fuse-integrated non-conductive portion and a secondary battery including the same, and more particularly, to a current collector for an electrode having a fuse-integrated non-conductive portion capable of blocking a short-circuit current in a non-conductive portion when a short circuit occurs by removing a part of the non-conductive portion where no electrode active material exists, and a secondary battery including the same.

[0002] Secondary batteries that can be recharged and discharged are attracting attention as power sources for devices that require high output and large capacity, including electric vehicles (EVs), hybrid electric vehicles (HEVs), and plug-in hybrid electric vehicles (Plug-In HEVs), which are being proposed as a solution to air pollution caused by existing gasoline and diesel vehicles that use fossil fuels.

[0003] These devices use medium- to large-sized battery modules that electrically connect multiple battery cells to provide high output and large capacity.

[0004] It is desirable for medium- to large-sized battery modules to be manufactured with as small a size and weight as possible, so square batteries and pouch-type batteries that can be stacked with high integration and have a small weight per capacity are mainly used as battery cells (unit cells) of medium- to large-sized battery modules.

[0005] In particular, pouch-type batteries with a structure in which a stack-type or stack / folding-type electrode assembly is embedded in a pouch-type battery case made of aluminum laminate sheet are attracting much attention and their use is gradually increasing due to reasons such as low manufacturing cost, light weight, and easy shape deformation.

[0006] Meanwhile, lithium secondary batteries contain various flammable substances, posing significant safety risks due to the risk of overheating, explosion, and other physical external impacts caused by overcharging, overcurrent, and other factors. Therefore, lithium secondary batteries are equipped with safety devices such as PTC (Positive Temperature Coefficient) elements and Protection Circuit Modules (PCMs) connected to the battery cells to effectively control abnormal conditions such as overcharging and overcurrent.

[0007] However, while the use of these safety devices can ensure safety, it comes with the disadvantages of increased component costs, more complex manufacturing processes, and reduced battery capacity per unit volume. Therefore, the industry has attempted to develop inventions that ensure safety in the event of overcurrent without using safety devices such as PTC elements and protection circuit modules.

[0008] In this process, there were attempts to install a fuse on the electrode lead, but there were problems such as it being difficult to guarantee that the fuse would cut off when overcurrent was applied, it being difficult to expect a quick cutoff, and the strength of the fuse installation area being low, resulting in poor durability.

[0009] Accordingly, there is a high need for the development of a current collector and a secondary battery for electrodes that can secure the disconnection of a fuse in the event of a short-circuit current or overcurrent due to a short circuit, enable rapid disconnection, and secure the strength of the fuse formation area.

[0010] The applicant proposed the present invention to solve the above problems.

[0011] Related prior art includes Korean Patent No. 10-1302430 (Title of invention: Secondary battery having a fuse-integrated electrode lead, Registration date: 20 August 2013).

[0012] The present invention has been proposed to solve the above-mentioned problems, and provides a current collector for an electrode having a fuse-integrated non-conductive portion capable of functioning as a fuse, and a secondary battery including the same.

[0013] The present invention provides a current collector for an electrode having a fuse-integrated non-conductive portion capable of preventing a decrease in rigidity of a non-conductive portion in which a fuse is formed, and a secondary battery including the same.

[0014] The present invention provides a current collector for an electrode having a fuse-integrated non-conductive portion capable of easily processing a cut portion capable of exhibiting a fuse function, and a secondary battery including the same.

[0015] The problems to be solved by the present invention are not limited to the problem(s) mentioned above, and other problems not mentioned will be clearly understood by those skilled in the art from the description below.

[0016] According to one embodiment of the present invention for achieving the above-described task, a current collector for an electrode having a fuse-integrated non-conductive portion includes: an electrode plate made of a metal material on which an electrode active material is applied or coated; and a non-conductive portion formed at one end of the electrode plate and free of the electrode active material; wherein the non-conductive portion includes a current pass portion formed such that a widthwise length of the non-conductive portion is narrower or shorter than that of other portions, and a cut portion formed at one side of the current pass portion so that the non-conductive portion does not exist; and a reinforcing portion may be attached to at least one of both sides of the non-conductive portion so as to cover at least one of the current pass portion or the cut portion, or so as not to cover all or part of the current pass portion.

[0017] At least one of the above-mentioned cut portions or the above-mentioned current pass portions can be formed along the width direction of the above-mentioned non-conductive portion.

[0018] The length of the current pass section in the width direction of the above-mentioned portion may be formed to be shorter than the width or length of the cut section.

[0019] The current pass section may be formed to be connected to either one of the widthwise ends of the non-conductive section, or may be formed in the middle portion so as not to be connected to either one of the widthwise ends of the non-conductive section.

[0020] The above-mentioned cut portion may be formed on at least one side of the current pass portion along the width direction of the non-conductive portion, or may be formed in the form of a hole between the current pass portions.

[0021] The above-mentioned cut portion or the above-mentioned current pass portion may be formed near the edge of the electrode plate.

[0022] The above-mentioned cut portion can be formed in a state where the reinforcing portion is provided or attached to at least one side of both sides of the plain portion.

[0023] The above-mentioned cut portion can be formed by removing the plain portion using a laser while the reinforcing portion is provided or attached to at least one of both sides of the plain portion.

[0024] The above reinforcement part may be made of a transparent tape that allows light or laser to pass through.

[0025] The above reinforcing portion may be provided so as to cover the current pass portion but not the cut portion, or may be provided with a length corresponding to the width direction length of the non-woven portion so as to integrally cover the current pass portion and the cut portion.

[0026] The above reinforcement part can be provided with heat-resistant tape.

[0027] Meanwhile, the present invention can provide a secondary battery including the above-described current collector for the electrode.

[0028] Specific details of other embodiments are included in the detailed description and accompanying drawings.

[0029] The electrode current collector having a fuse-integrated non-conductive portion according to the present invention and the secondary battery including the same do not need to have a separate fuse because the non-conductive portion can perform the fuse function.

[0030] The electrode current collector having a fuse-integrated non-conductive portion according to the present invention and the secondary battery including the same include a tape-shaped reinforcing portion attached to at least one side of both surfaces of the non-conductive portion or covering at least one side of both surfaces, including a cut portion formed in the non-conductive portion, thereby preventing the rigidity or strength of the non-conductive portion from being reduced due to the cut portion, and the reinforcing portion can prevent the current pass portion from being immediately broken or damaged when the current pass portion is folded.

[0031] The current collector for an electrode having a fuse-integrated non-conductive portion according to the present invention and the secondary battery including the same can easily form a cut portion by removing the non-conductive portion using a laser while attaching a transparent or light-transmittable tape-shaped reinforcing portion to at least one side of both sides of the non-conductive portion, and can form cut portions of various shapes.

[0032] The electrode current collector having a fuse-integrated non-conductive portion according to the present invention and the secondary battery including the same can accurately process a cutting portion while confirming the position of the tip of the laser because the reinforcing portion provided on at least one of both sides of the non-conductive portion is transparent.

[0033] The current collector for an electrode having a fuse-integrated non-conductive portion according to the present invention and the secondary battery including the same can prevent or delay the generation of flames or smoke by attaching a reinforcing portion made of a heat-resistant tape such as polyimide instead of an OPP tape to at least one of a current pass portion or a cut portion, thereby preventing or delaying the generation of flames or smoke due to ignition of the reinforcing portion even when the temperature of the secondary battery rises during a short circuit.

[0034] FIG. 1 is a perspective view illustrating a secondary battery including a current collector for an electrode having a fuse-integrated non-conductive portion according to one embodiment of the present invention.

[0035] Figure 2 is a perspective view showing the inside of a secondary battery according to Figure 1.

[0036] Figure 3 is a plan view illustrating the inside of a secondary battery according to Figure 1.

[0037] FIGS. 4 and 5 are plan views illustrating a current collector for an electrode having a fuse-integrated non-conductive portion according to one embodiment of the present invention.

[0038] FIGS. 6 to 10 are drawings illustrating a fuse-integrated non-conductive part according to one embodiment of the present invention.

[0039] FIGS. 11 to 13 are drawings illustrating a fuse-integrated non-conductive part according to another embodiment of the present invention.

[0040] FIGS. 14 to 17 are drawings illustrating a fuse-integrated non-conductive part according to another embodiment of the present invention.

[0041] FIG. 18 and FIG. 19 are graphs showing the results of a short-circuit current experiment on a fuse-integrated positive electrode non-conductor according to one embodiment of the present invention.

[0042] Hereinafter, embodiments disclosed in this specification will be described in detail with reference to the attached drawings. Identical or similar components will be given identical or similar drawing reference numerals, and redundant descriptions thereof will be omitted. The suffix "part" used for components in the following description is assigned or used interchangeably only for the convenience of writing the specification, and does not in itself have a distinct meaning or role. In addition, when describing the embodiments disclosed in this specification, if it is determined that a specific description of a related known technology may obscure the gist of the embodiments disclosed in this specification, a detailed description thereof will be omitted. In addition, the attached drawings are only intended to facilitate easy understanding of the embodiments disclosed in this specification, and the technical ideas disclosed in this specification are not limited by the attached drawings, and should be understood to include all modifications, equivalents, and substitutes included in the spirit and technical scope of the present invention.

[0043] Terms that include ordinal numbers, such as first, second, etc., may be used to describe various components, but the components are not limited by these terms. These terms are used solely to distinguish one component from another.

[0044] When it is said that a component is "connected" to another component, it should be understood that it may be directly connected to that other component, but there may also be other components in between.

[0045] Singular expressions include plural expressions unless the context clearly indicates otherwise.

[0046] In this application, terms such as “include” or “have” are intended to specify the presence of a feature, number, step, operation, component, part or combination thereof described in the specification, but should be understood not to exclude in advance the possibility of the presence or addition of one or more other features, numbers, steps, operations, components, parts or combinations thereof.

[0047] Please note that the drawings are schematic and not drawn to scale. The relative dimensions and proportions of parts in the drawings may be exaggerated or reduced for clarity and convenience, and any dimensions are for illustrative purposes only and are not limiting. In addition, identical structures, elements, or components appearing in more than one drawing are designated by the same reference numerals to indicate similar features.

[0048] The embodiments of the present invention specifically illustrate ideal embodiments of the present invention. Consequently, various modifications to the drawings are anticipated. Therefore, the embodiments are not limited to the specific form of the illustrated area, and include, for example, modifications resulting from manufacturing processes.

[0049] Hereinafter, embodiments of the present invention will be described in detail with reference to the attached drawings.

[0050] FIG. 1 is a perspective view illustrating a secondary battery including an electrode current collector having a fuse-integrated non-coated portion according to an embodiment of the present invention, FIG. 2 is a perspective view illustrating the inside of the secondary battery according to FIG. 1, FIG. 3 is a plan view illustrating the inside of the secondary battery according to FIG. 1, FIGS. 4 and 5 are plan views illustrating an electrode current collector having a fuse-integrated non-coated portion according to an embodiment of the present invention, FIGS. 6 to 10 are views illustrating a fuse-integrated non-coated portion according to an embodiment of the present invention, FIGS. 11 to 13 are views illustrating a fuse-integrated non-coated portion according to another embodiment of the present invention, FIGS. 14 to 17 are views illustrating a fuse-integrated non-coated portion according to still another embodiment of the present invention, and FIGS. 18 and 19 are graphs illustrating the results of a short-circuit current experiment on a fuse-integrated positive electrode non-coated portion according to an embodiment of the present invention.

[0051] Referring to FIGS. 1 and 2, a secondary battery (1) according to one embodiment of the present invention may include an electrode assembly (10) and an outer material (11). The outer material (11) may be expressed as a pouch.

[0052] The electrode assembly (10) has a form in which a positive electrode plate (101) / separator (not shown) / negative electrode plate (201) are alternately stacked. That is, the electrode assembly (10) can be obtained by alternately stacking the positive electrode plate (101) / separator (not shown) / negative electrode plate (201) so that a separator is positioned between the positive electrode plate (101) and the negative electrode plate (210).

[0053] Hereinafter, electrode plates (101, 201) refer to a positive electrode (or a cathode, 101) and a negative electrode (or an anode, 201).

[0054] The positive electrode plate (101) may be formed of aluminum metal foil, and a positive electrode active material (not shown) may be applied or coated on at least one surface. The positive electrode active material may be formed of a layered compound such as lithium cobalt oxide (LiCoO2), lithium nickel oxide (LiNiO2), or a compound substituted with one or more transition metals.

[0055] The positive electrode plate (101) located in the center of the electrode assembly (10) has the positive electrode active material formed on both sides, whereas in the case of the positive electrode plate (101) located at the bottom or top of the electrode assembly (10), the positive electrode active material may be formed only on one side, that is, the side facing the outer material (11).

[0056] The negative electrode plate (201) may be formed of a copper metal foil, and may have a negative electrode active material (not shown) applied or coated on at least one surface. The negative electrode active material may be formed of carbon, for example, non-graphitizable carbon, graphite carbon, etc.

[0057] The negative electrode plate (201) located in the center of the electrode assembly (10) has the negative electrode active material formed on both sides, whereas in the case of the negative electrode plate (201) located at the bottom or top of the electrode assembly (10), the negative electrode active material may be formed only on one side, that is, the side facing the outer material (11).

[0058] The above separator may be a thin insulating film with high ion permeability and mechanical strength. The separator may be formed from an olefin polymer, such as polypropylene or polyethylene, which are chemically resistant and hydrophobic.

[0059] The outer material (11) in which the electrode assembly (10) is accommodated may include a lower part (13) and an upper part (12). The lower part (13) of the outer material (11) may include a receiving portion (14) and a lower sealing portion (13a) formed at the edge of the receiving portion (14).

[0060] The receiving portion (14) can be formed by pressing the lower portion (13) of the outer material (11) and can receive the electrode assembly (10). The lower sealing portion (13a) can be formed by extending outwardly by bending from the upper edge of the receiving portion (14).

[0061] The upper part (12) of the outer material (11) may include an upper sealing part (12a) corresponding to the lower sealing part (13a). The upper sealing part (12a) is bonded to the lower sealing part (13a) by heating and pressurization, thereby maintaining the airtightness of the interior of the outer material (11).

[0062] Meanwhile, a positive electrode non-conductive portion (120) may be formed by extending and protruding from one edge of the positive electrode plate (101). The positive electrode non-conductive portion (120) does not contain a positive electrode active material. Similarly, a negative electrode non-conductive portion (220) may be formed by extending and protruding from one edge of the negative electrode plate (201). The negative electrode non-conductive portion (220) does not contain a negative electrode active material.

[0063] When the positive electrode plates (101) and negative electrode plates (201) are alternately laminated to form an electrode assembly (10), as shown in FIGS. 1 to 3, the positive electrode non-coated portions (120) are gathered together and the negative electrode non-coated portions (220) are gathered together. At this time, the positive electrode non-coated portions (120) and the negative electrode non-coated portions (220) must be separated so as not to come into contact with each other.

[0064] A positive lead tab (111) and a negative lead tab (211) may be connected to the positive uncoated portion (120) and the negative uncoated portion (220), respectively. An insulating tape (112) may be provided at the portion where the positive uncoated portion (120) and the positive lead tab (111) are connected. Similarly, an insulating tape (212) may also be provided at the portion where the negative uncoated portion (220) and the negative lead tab (211) are connected.

[0065] As shown in Fig. 3, when the upper sealing portion (12a) and the lower sealing portion (13a) of the outer material (11) are bonded to each other, the insulating tape (112, 212) is positioned between the upper sealing portion (12a) and the lower sealing portion (13a).

[0066] Hereinafter, with reference to FIGS. 4 to 10, a current collector (100, 200) for an electrode having a fuse-integrated non-conductive portion according to one embodiment of the present invention will be described. The current collector for an electrode (100, 200, current collector for electrode) is a metal current collector formed of a metal such as aluminum or copper.

[0067] As illustrated in FIG. 4, a current collector (100, 200) for a metal electrode having a fuse-integrated non-conductive portion (120, 220) according to one embodiment of the present invention may include an electrode plate (101, 201) made of a metal material on which an electrode active material is applied or coated; and a non-conductive portion (120, 220) formed at one end of the electrode plate (101, 201) and in which no electrode active material is present. Here, the non-conductive portion (120, 220) may be formed to extend from one end of the electrode plate (101, 201) made of a metal material.

[0068] Fig. 4 illustrates a state in which a positive electrode plate (101) and a negative electrode plate (210) are stacked. In the case of Fig. 4, the negative electrode plate (201) is positioned at the top and the positive electrode plate (101) is positioned at the bottom of the negative electrode plate (201). Since the positive electrode plate (101) is smaller than the negative electrode plate (201), the positive electrode plate (101) and the negative electrode plate (201) are alternately stacked so that the positive electrode plate (101) is positioned inside the edge of the negative electrode plate (201).

[0069] The positive electrode non-conductive portion (120) may include a lead tab connection portion (121), a current pass portion (123), and a cut portion (125). Similarly, the negative electrode non-conductive portion (220) may include a lead tab connection portion (221), a current pass portion (223), and a cut portion (225).

[0070] A current collector (100, 200) for an electrode according to one embodiment of the present invention may include a current collector (100, current collector for a positive electrode or cathode) for a positive electrode and a current collector (200, current collector for a negative electrode or anode) for a negative electrode. The shape or structure of the current collector (100) for a positive electrode, which includes a positive plate (101) and a positive electrode non-conducting portion (120), is the same as the shape or structure of the current collector (200) for a negative electrode, which includes a negative plate (201) and a negative electrode non-conducting portion (220). Therefore, the current collector (100) for a positive electrode will be described below.

[0071] Referring to FIGS. 5 to 10, the positive electrode portion (120) may be provided with a cutout (225) that is narrower or shorter than another portion, i.e., the lead tab connection portion (121). That is, the positive electrode portion (120) may include a cutout (125) that is not the same width along its length (up-down direction) but is relatively narrow or short.

[0072] In other words, the positive electrode non-conductive portion (120) may include a current pass portion (123) formed so that the length in the width direction (left-right direction) of the positive electrode non-conductive portion (120) is narrower or shorter than other portions, and a cut portion (125) formed on one side of the current pass portion (123) so that the positive electrode non-conductive portion (120) does not exist.

[0073] As illustrated in FIGS. 6 to 15, in a current collector (100) for a positive electrode having a fuse-integrated non-conductive portion (120) according to one embodiment of the present invention, at least one cut portion (125) may be formed along the width direction of the positive electrode non-conductive portion (120).

[0074] Referring to FIGS. 6 to 8, two (see FIG. 7) or three (see FIG. 8) cut portions (125) may be formed along the width direction (i.e., left-right direction) of the positive electrode portion (120).

[0075] In this way, when at least one cut portion (125) is formed along the width direction of the positive electrode non-conductive portion (120), a current pass portion (123) can be formed between the cut portions (125). The cut portion (125) is a portion where the positive electrode non-conductive portion (120) or the positive electrode plate (101) does not exist, and the current pass portion (123) is a portion where the positive electrode non-conductive portion (120) or the positive electrode plate (101) exists. Therefore, the current flowing from the positive electrode plate (101) can flow to the positive electrode lead tab (111) through the current pass portion (123).

[0076] As illustrated in FIGS. 6 to 8, the current pass section (123) may be formed to be shorter than the width or length of the cut section (125). In addition, the current pass section (123) may be formed to have a shorter length than the width of the lead tab connection section (121). For example, the width of the lead tab connection section (121) is the longest, the width of the cut section (125) is the next longest, and the width of the current pass section (123) is the shortest. Here, the width direction means the left-right direction.

[0077] As illustrated in FIGS. 6 to 8, when two or more cut portions (125) are formed along the width direction of the positive electrode (120), the number of current pass portions (123) may be formed to be less than the number of cut portions (125). In the case of FIG. 7, there are two cut portions (125) and one current pass portion (123). In the case of FIG. 8, there are three cut portions (125) and two current pass portions (123).

[0078] Since the current pass section (123) is positioned between the cut sections (125) along the width direction of the positive electrode (120), the number of current pass sections (123) can be formed by one less than the number of cut sections (125).

[0079] As shown in FIG. 7, a cut portion (125) may be formed on one side of the current pass portion (123), and as shown in FIG. 8, a cut portion (126) may be formed between the current pass portions (123).

[0080] As illustrated in FIGS. 7 and 8, the cutout (125) formed on one side of the current pass portion (123) may be formed to be connected to the width-wise edge of the positive electrode non-conductive portion (120) or the lead tab connection portion (121). That is, the cutout (125) formed on one side of the current pass portion (123) may be provided in a form in which one side is open.

[0081] On the other hand, as illustrated in Fig. 8, the cut portion (126) formed between the current pass portions (123) may have a shape in which the entire circumference is surrounded by the positive electrode non-conductive portion (120) and the current pass portion (123) without any open portions. That is, the cut portion (126) formed between the current pass portions (123) may be provided in the shape of a hole.

[0082] As illustrated in FIGS. 6 to 8, the cut portions (125, 126) and the current pass portion (123) may be positioned on the same line along the width direction of the positive electrode portion (120) or the lead tab connection portion (121), but the cut portions (125, 126) and the current pass portion (123) may be positioned on different lines. In addition, multiple cut portions (125, 126) may also be positioned on different lines, and multiple current pass portions (123) may also be positioned on different lines.

[0083] Meanwhile, the cut portion (125, 126) or current pass portion (123) may be formed near the edge of the positive electrode plate (101).

[0084] Referring to Fig. 6, it is preferable that the cut portion (125) or the current pass portion (123) be formed closer to the lower end (121b) than the upper end (121a) of the positive electrode non-conductive portion (120). The lower end (121b) of the positive electrode non-conductive portion (120) is connected to the edge of the positive electrode plate (101). Therefore, it is preferable that the cut portion (125, 126) or the current pass portion (123) be formed close to the edge of the positive electrode plate (101).

[0085] The current generated in the positive electrode plate (101) of the current collector (100) for the positive electrode flows from the positive electrode plate (101) to the positive electrode non-conducting portion (120), passes through the positive electrode non-conducting portion (120), and is supplied to an external device through the positive electrode lead tab (111). Therefore, the positive electrode non-conducting portion (120) functions as a current path.

[0086] However, current cannot flow through the portion where the cut portion (125) of the positive electrode (120) is formed, and current flows only through the current pass portion (123). Since the width of the current pass portion (123) is much narrower than that of other portions, i.e., the portion without the cut portion (125), high resistance may occur when current passes through the current pass portion (125).

[0087] In particular, when a short circuit occurs in a secondary battery (1) including an electrode assembly (10), a short circuit current flows through the current pass section (123), and a high resistance is applied to the current pass section (123), so that the temperature of the current pass section (123) increases, and ultimately, the current pass section (123) is disconnected. In this way, when a short circuit occurs, the current pass section (123) is disconnected due to excessive short circuit current, so that the safety of the secondary battery can be secured when a short circuit occurs.

[0088] The positive electrode non-conductive portion (120) can function as a fuse by the cut portion (125) and current pass portion (123) formed in the positive electrode non-conductive portion (120). Therefore, the positive electrode non-conductive portion (120) becomes a fuse-integrated non-conductive portion. Similarly, the negative electrode non-conductive portion (220) is also a fuse-integrated non-conductive portion.

[0089] Meanwhile, since the cut portion (125) and the current pass portion (123) are formed in the positive electrode non-conductive portion (120), the strength or rigidity of the positive electrode non-conductive portion (120) may be weakened. Since the width of the current pass portion (123) is narrow or short, the current pass portion (123) may be broken during the process of manufacturing the electrode assembly (10) or transporting the secondary battery (1). In addition, the current pass portion (123) may be broken or damaged when folded.

[0090] According to one embodiment of the present invention, a current collector (100) for an electrode having a fuse-integrated non-conductive portion (120) can prevent the strength or rigidity of the positive electrode non-conductive portion (120) from being lowered by attaching a reinforcing portion (130) along the width direction to at least one of both sides of the positive electrode non-conductive portion (120), the reinforcing portion (130) being provided so as to cover at least one of the cut portion (125) or the current pass portion (123) or not to cover all or part of the current pass portion (123). That is, by providing the reinforcing portion (130), it is possible to prevent the strength or rigidity of the positive electrode non-conductive portion (120) from being lowered or the anti-folding stiffness from being lowered due to the current pass portion (123) or the cut portion (125).

[0091] The reinforcing member (130) may be provided on at least one of the upper and lower surfaces of the positive electrode non-conducting member (120). The reinforcing member (130) may be provided only on the upper surface of the positive electrode non-conducting member (120), only on the lower surface, or may be provided on both the upper and lower surfaces.

[0092] The reinforcing portion (130) may be provided to completely cover the cut portion (125, 126) and the current pass portion (123) as illustrated in FIGS. 6 to 8, may not completely cover the current pass portion (123) or may only partially cover the current pass portion (123) as illustrated in FIGS. 11 to 13, or may be provided to completely cover only the current pass portion (123) as illustrated in FIGS. 14 to 17. In addition, although not illustrated, the reinforcing portion (130) may be provided or attached to cover a current-carrying portion other than the current pass portion (123) in the non-conductive portion (120).

[0093] In this way, the reinforcing member (130) may be provided to cover only the current pass section (123), may not completely cover the current pass section (123), may cover only a portion of the current pass section (123), or may cover both the current pass section (123) and the cut section (125). In addition, although not illustrated, the reinforcing member (130) may be attached to a current-carrying member other than the current pass section (123).

[0094] The reinforcing member (130) is provided to be attached to at least one of the upper and lower surfaces of the current pass member (123) so as to completely cover the current pass member (123), thereby supplementing the rigidity or strength of the current pass member (123).

[0095] In this way, by providing a reinforcing member (130) that covers or is attached to at least one of the cut portion (125, 126) or the current pass portion (123), the rigidity of the cut portion (125, 126) can be supplemented by the reinforcing member (130) located in the cut portion (125, 126) without the anode non-conducting member (120) or the cathode plate (101), and the rigidity of the narrow current pass portion (123) can also be strengthened by the reinforcing member (130) attached to at least one surface of the current pass portion (123).

[0096] Here, the reinforcing member (130) may be provided in the form of an OPP (Oriented Polypropylene) tape having an adhesive function or adhesive component. The reinforcing member (130) provided in the form of an adhesive tape may be provided to be attached to at least one of the upper and lower surfaces of the positive electrode non-conductive portion (120). At this time, the reinforcing member (130) must be provided to cover or be attached to the cut portion (125, 126) and / or the current pass portion (123).

[0097] In addition, the reinforcing member (130) may be formed of a heat-resistant tape such as polyimide rather than an OPP tape. By attaching the reinforcing member (130) formed of a heat-resistant tape such as polyimide to at least one of the current passage section (123) or the cut section (125), even if the temperature of the secondary battery rises due to a short circuit, the generation of flames or smoke in the reinforcing member (130) can be prevented or delayed.

[0098] In addition, the reinforcing member (130) is necessary not only to prevent the strength of the anode-free portion (120) from being reduced due to the cut portion (125, 126) or the current pass portion (123), but also to process or create the cut portion (125, 126) and the current pass portion (123).

[0099] A current collector (100) for a positive electrode having a fuse-integrated non-conductive portion (120) according to one embodiment of the present invention can form a cut portion (125, 126) or a current pass portion (123) by attaching a reinforcing portion (130) to at least one surface of the upper and lower surfaces of the positive electrode non-conductive portion (120), and then attaching or providing the reinforcing portion (130) to at least one surface of the positive electrode non-conductive portion (120).

[0100] Here, a laser is irradiated to the portion of the positive electrode non-conductive portion (120) covered by the reinforcing portion (130) to remove the positive electrode non-conductive portion (120) or to form a cut portion (125, 126) or a current pass portion (123) by removing the positive electrode plate (101) forming the positive electrode non-conductive portion (120).

[0101] The cut portion (125, 126) or current pass portion (123) can be formed by laser processing or laser cutting. In this way, the reinforcing portion (130) must be made of a transparent material so that the cut portion (125, 126) or current pass portion (123) can be processed using a laser.

[0102] Since the reinforcing part (130) is made of a transparent material or transparent tape that allows light or laser to pass through, it is possible to visually check whether the laser is being irradiated to the desired point during laser processing, and it is possible to visually check whether the cutting part (125, 126) or current pass part (123) is being processed as designed.

[0103] As illustrated in Fig. 6, a processing line (CL) for creating a cut (125) is first marked on the surface of a long strip-shaped anode non-conducting portion (120). After marking the processing line (CL) on the surface of the anode non-conducting portion (120), a reinforcing member (130) is attached to at least one of the upper and lower surfaces of the anode non-conducting portion (120) so as to completely cover the processing line (CL).

[0104] At this time, since the reinforcing part (130) is made of a transparent material or transparent tape that allows light or laser to pass through, the processing line (CL) is visible even when the reinforcing part (130) is attached to the surface of the anode non-conducting part (120), and the worker can visually confirm the processing line (CL). In this state, the worker can form a cut part (125) or a current pass part (123) by irradiating a laser along the processing line (CL). That is, by irradiating a laser along the processing line (CL) to remove a portion of the anode non-conducting part (120) surrounded by the processing line (CL), a cut part (125) or a current pass part (123) as illustrated in FIG. 7 can be created.

[0105] Since the reinforcement part (130) is transparent, the worker can perform the processing work while checking whether the laser is being accurately irradiated along the processing line (CL).

[0106] When the incision (125) is processed using a laser, the current pass section (123) can also be processed as a result. That is, the incision (125) and the current pass section (123) can be created simultaneously by only processing the incision (125).

[0107] In this way, the cut portion (125, 126) can be formed in a state where the reinforcing portion (130) is provided or attached to at least one of the two sides of the positive electrode non-conductive portion (120).

[0108] Additionally, the cut portion (125, 126) can be formed by removing the anode non-conductive portion (120) using a laser while the reinforcing portion (130) is provided or attached to at least one of both sides of the anode non-conductive portion (120).

[0109] Figures 9 and 10 illustrate the dimensional relationship of the cut portion (125) or current pass portion (123) formed in the positive electrode portion (120).

[0110] FIG. 9 illustrates a positive electrode non-conducting portion (120) having one current pass portion (123) of two cut portions (125) formed therein, and FIG. 10 illustrates a positive electrode non-conducting portion (120) having three cut portions (125, 126) and two current pass portions (123) formed therein.

[0111] First, referring to Fig. 9, the width (W2, W3) of the cut portion (125) is smaller than the width (W1) of the positive electrode portion (120), and the width (W4) of the current pass portion (123) is smaller than the width (W2, W3) of the cut portion (125). The width (W4) of the current pass portion (123) can be formed to be approximately 1 to 5 mm.

[0112] Compared to the length (L1) of the positive electrode (120), it is preferable that the length (L4) of the cut portion (125) and the current pass portion (123) be formed relatively much shorter. It is preferable that the length (L4) of the cut portion (125) and the current pass portion (123) be formed to be approximately 0.1 to 1 mm.

[0113] In addition, it is preferable that the length (L3) between the lower end of the positive electrode non-coated portion (120) be longer than the length (L2) between the cut portion (125) or the current pass portion (123) and the upper end of the positive electrode non-coated portion (120). In this way, the length (L3) between the cut portion (125) or the current pass portion (123) and the lower end of the positive electrode non-coated portion (120) must be shorter than the length (L2) between the upper end of the positive electrode non-coated portion (120) so that the cut portion (125) or the current pass portion (123) can be positioned close to the positive electrode plate (101).

[0114] Next, referring to Fig. 10, the width (W2, W3, W5) of the cut portions (125, 126) is smaller than the width (W1) of the positive electrode portion (120), and the width (W4, W6) of the current pass portion (123) is smaller than the width (W2, W3, W5) of the cut portion (125). It is preferable that the width (W4, W6) of the current pass portion (123) be formed to be approximately 1 to 5 mm.

[0115] Compared to the length (L1) of the positive electrode (120), it is preferable that the length (L4) of the cut portion (125, 126) and the current pass portion (123) be formed relatively much shorter. The length (L4) of the cut portion (125, 126) and the current pass portion (123) can be formed to be approximately 0.1 to 1 mm.

[0116] In addition, it is preferable that the length (L3) between the lower end of the positive electrode non-coated portion (120) be longer than the length (L2) between the cut portion (125, 126) or the current pass portion (123) and the upper end of the positive electrode non-coated portion (120). In this way, the length (L3) between the cut portion (125, 126) or the current pass portion (123) and the lower end of the positive electrode non-coated portion (120) must be shorter than the length (L2) between the upper end of the positive electrode non-coated portion (120) so that the cut portion (125, 126) or the current pass portion (123) can be positioned close to the positive electrode plate (101).

[0117] Although the cutouts (125, 126), current pass portions (123), and reinforcement portions (130) formed in the positive electrode non-coated portion (120) of the current collector (100) for the positive electrode have been described above, the cutouts (225) and current pass portions (223) formed in the negative electrode non-coated portion (220) of the current collector (200) for the negative electrode also have the same shape and function as those formed in the positive electrode non-coated portion (120), and reinforcement portions (not shown) may be attached or provided to the cutouts (225) and current pass portions (223) of the negative electrode non-coated portion (220).

[0118] FIGS. 11 to 13 illustrate a fuse-integrated positive electrode non-conductive portion (120) according to another embodiment of the present invention. Referring to FIGS. 11 to 13 , the reinforcing portion (130) may be provided in a form that does not completely cover the current pass portion (123) or only partially covers it. In this case, the reinforcing portion (130) may be provided so as to completely cover the cut portion (125) or only partially cover it.

[0119] As illustrated in Fig. 11, a hole (131) is formed in the reinforcing portion (130), and the current pass portion (123) is provided to be exposed through the hole (131), and the cut portion (125) may be provided to be completely covered by the reinforcing portion (130). At this time, depending on the size or position of the hole (131), the current pass portion (123) may be partially covered by the reinforcing portion (130).

[0120] As illustrated in FIGS. 12 and 13, the reinforcing portion (130) may be provided in a plurality of segmented forms so as to completely cover at least a portion of the cut portion (125) while not completely covering the current pass portion (123). In cases where the reinforcing portion (130) does not completely cover the current pass portion (123), a portion of the cut portion (125) may not be covered by the reinforcing portion (130). In addition, although not illustrated, in cases where the reinforcing portion (130) is provided to completely cover the cut portion (125), it may also be provided to cover a portion of the current pass portion (123).

[0121] FIGS. 14 to 17 illustrate a fuse-integrated bipolar non-conductor (120) according to another embodiment of the present invention.

[0122] Referring to FIGS. 14 and 15, the shape and position of the current pass section (123) and the cut sections (125, 126) are the same as those shown in FIGS. 6 to 8, but the shape or position of the reinforcement section (130) is different from those shown in FIGS. 6 to 8. In the cases of FIGS. 11 to 13, the reinforcement section (130) is provided so as to completely cover the current pass section (123), while it may be provided in a form that does not completely cover the cut section (125).

[0123] Referring to FIGS. 6 to 15, the current pass section (123) may be formed to be connected to either one of the widthwise ends of the non-conductive section (120) or may be formed in the middle portion so as not to be connected to either one of the widthwise ends of the non-conductive section (120). In addition, the cut sections (125, 126) may be formed on at least one of the two sides of the current pass section (123) along the widthwise direction of the non-conductive section (120) or may be formed in the shape of a hole (126) between the current pass sections (123).

[0124] Referring to FIGS. 14 and 15, when the reinforcing portion (130) is provided on only one side of the current pass portion (123), the reinforcing portion (130) and the current pass portion (123) may be provided in the same number. In the case of FIG. 14, the number of current pass portions (123) and reinforcing portions (130) is one, and in the case of FIG. 15, the number of current pass portions (123) and reinforcing portions (130) is two.

[0125] Referring to FIGS. 16 and 17, the shape and position of the current pass portion (123) and the cut portions (125, 126) are different from those illustrated in FIGS. 6 to 8, and the shape or position of the reinforcing portion (130) is also different from those illustrated in FIGS. 6 to 15. At least one of the cut portions (123) is provided in an open form at one end of the width direction of the non-woven portion (120).

[0126] On the other hand, in the case of FIGS. 16 and 17, the cut portion (125) is provided at a position spaced apart from one end of the width direction of the non-conductive portion (120), but is different in that it is provided in the form of a hole between the current pass portion (123). The reinforcing portion (130) is provided in a form that completely covers the current pass portion (123), but the cut portion (125) is provided in the same manner as the reinforcing portion (130) of FIGS. 14 and 15 in that it does not completely cover it.

[0127] In this way, the reinforcing portion (130) may be provided with a length corresponding to the width direction of the non-woven portion (120) so as to integrally cover the current pass portion (123) and the cut portion (125, 125) as illustrated in FIGS. 6 to 8, or may be provided so as to completely cover the cut portion (125) but not completely cover the current pass portion (123) as illustrated in FIGS. 11 to 13, or may be provided so as to completely cover the current pass portion (123) but not completely cover the cut portion (125) as illustrated in FIGS. 14 to 17.

[0128] Meanwhile, the inventor of the present invention conducted an experiment to determine whether the current pass section (123) to which the reinforcing section (130) is attached is short-circuited when current flows through the positive electrode non-conducting section (120) made of aluminum foil, what is the magnitude of the current when short-circuited, and whether short-circuiting occurs depending on the width (size) of the current pass section (123). The experiment was conducted using an OPP adhesive tape with a thickness of 60 μm as the reinforcing section (130) for a positive electrode current collector (100) made of aluminum foil with a thickness of 12 μm. In addition, the laser conditions used to form the cut section (125) in the positive electrode non-conducting section (120) are Loop: 1, Speed: 400, Power: 63%, and Height: 18.2 cm.

[0129] (1) Experiment 1

[0130] In Experiment 1, the voltage and current when the current pass section (123) is short-circuited were measured while gradually increasing the current flowing through the anode non-conductive section (120) made of aluminum metal foil. The results are as shown in [Table 1] and [Table 2]. [Table 1] shows the results of 9 or 10 measurements when a reinforcing section (130) was attached to one side of the current pass section (123) with a width of 1 mm, 3 mm, or 5 mm, and [Table 2] shows the results of 8 to 10 measurements when a reinforcing section (130) was attached to both sides of the current pass section (123) with a width of 1 mm, 3 mm, or 5 mm.

[0131] Number of measurements 1mm 3mm 5mm Voltage (V) Current (A) Voltage (V) Current (A) Voltage (V) Current (A) 11.211.32.018.71.522.621.512.11.416.91.415.931.311.82.016.82.020.341.013.41.516.63.020.051.513.81.717.52.018.461.512.61.817.22.018.771.514.61.717.92.020.581.514.01.718.12.019.391.514.51.718.32.017.8101.714.8

[0132] Number of measurements 1mm 3mm 5mm Voltage (V) Current (A) Voltage (V) Current (A) Voltage (V) Current (A) 11.5 15.6 1.5 17.7 2.12 0.3 21.5 14.5 1.5 17.6 1.8 21.6 31.5 12.4 1.5 18.11 20.14 1.5 15.11 17.8 1.8 18.4 5 1.8 14.6 1.8 16.72 018.9 61.8 15.5 1.8 17.9 2.2 20.27 1.5 14.6 1.8 17.9 2.0 20.8 81.5 13.7 1.7 17.8 2.0 19.5 9 1.7 17.9 2.0 21.0 10 1.7 17.4

[0133] FIG. 18 and FIG. 19 are graphs showing the results of a short-circuit current experiment on a fuse-integrated positive electrode non-conductor according to one embodiment of the present invention. FIG. 18 is a graph showing the results of [Table 1], and FIG. 19 is a graph showing the results of [Table 2].

[0134] Referring to [Table 1] and FIG. 18, when the current flowing through the current collector (100) for the positive electrode is gradually increased, when the width of the current pass section (123) with the reinforcement section (130) attached to only one side is 1 mm, a short circuit occurs when an average current of 13.3 A flows, when the width is 3 mm, a short circuit occurs when an average current of 17.6 A flows, and when the width is 5 mm, a short circuit occurs when an average current of 19.3 A flows.

[0135] Referring to [Table 2] and FIG. 19, when the current flowing through the current collector (100) for the positive electrode is gradually increased, when the width of the current pass section (123) with the reinforcement section (130) attached only to both sides is 1 mm, a short circuit occurs when an average current of 14.5 A flows, when the width is 3 mm, a short circuit occurs when an average current of 17.7 A flows, and when the width is 5 mm, a short circuit occurs when an average current of 20.1 A flows.

[0136] It can be seen that the wider the current pass section (123), the greater the current at which a short circuit occurs. In addition, it can be seen that the difference in short circuit current is not large when the reinforcement section (130) is attached to only one side and when it is attached to both sides.

[0137] (2) Experiment 2

[0138] In Experiment 2, it was confirmed whether a short circuit occurred in the current pass section (123) and whether the reinforcing section (130) smoked or ignited depending on the magnitude of the current flowing in the anode non-conductive section (120) made of aluminum metal foil.

[0139] [Table 3] shows the results of measuring whether the current pass section is disconnected, smoked, or ignited when a current of 5 to 65 A flows while increasing the current by 5 A in cases where a reinforcing member (130) is attached to one side of a current pass section (123) with a width of 1 mm, 3 mm, and 5 mm. [Table 4] shows the results of measuring whether the current pass section is disconnected, smoked, or ignited when a current of 5 to 65 A flows while increasing the current by 5 A in cases where a reinforcing member (130) is attached to both sides of a current pass section (123) with a width of 1 mm, 3 mm, and 5 mm. The results of [Table 3] and [Table 4] are the measurement results for a positive electrode non-conductive section (120) with a length (vertical) of 50 mm × width (horizontal) of 20 mm.

[0140] Below, in [Table 3] to [Table 8], × means that the current pass section is not cut off and thus does not function as a fuse, and ○ means that the current pass section is cut off and thus functions as a fuse.

[0141] Current (A) 1mm 3mm 5mm 5××× 10××× 15○×× 20○○× 25○○× 30○○× 35○× 40○○ 45○○ 50○○ 55○ 60○ 65○

[0142] Referring to [Table 3], when the reinforcement part (130) was attached to only one side of the current pass part (123), a current pass part with a width of 1 mm had a short circuit when currents of 15 A, 20 A, and 25 A flowed, but there was no smoking or ignition. A current pass part with a width of 3 mm had a short circuit when a current of 20 to 50 A flowed, there was smoking (smoke generation) when currents of 20 A and 25 A flowed, and there was ignition (spark generation) when currents of 30 to 40 A flowed. A current pass part with a width of 5 mm had a short circuit when a current of 40 to 65 A flowed, there was smoking (smoke generation) when currents of 45 A flowed, and there was ignition (spark generation) when currents of 50 A and 55 A flowed. Additionally, when the reinforcing part (130) was changed from OPP tape to polyimide tape, no flame or smoke occurred.

[0143] Current (A) 1mm 3mm 5mm 5××× 10××× 15××× 20○×× 25○×× 30○× 35○○ 40○○ 45○○ 50○○ 55○○ 60○○ 65○

[0144] Referring to [Table 4], when the reinforcing member (130) was attached to both sides of the current pass section (123), a current pass section with a width of 1 mm experienced a short circuit when currents of 20 A and 25 A flowed, and there was smoking when a current of 20 A flowed, but no ignition. A current pass section with a width of 3 mm experienced a short circuit when a current of 30 to 60 A flowed, there was smoking (smoke generation) when a current of 30 to 40 A flowed, and there was ignition (spark generation) when a current of 45 A flowed. A current pass section with a width of 5 mm experienced a short circuit when a current of 35 to 65 A flowed, there was ignition (spark generation) when a current of 35 to 55 A flowed, and there was no ignition when a current of 0 A and 55 A flowed.

[0145] (3) Experiment 3

[0146] In Experiment 3, depending on the magnitude of the current flowing through the anode non-conductive portion (120) made of aluminum metal foil, it was confirmed whether a short circuit occurred in the current pass portion (123) of the shape shown in Fig. 7 and whether the reinforcing portion (130) smoked or ignited (see [Table 5]), and it was confirmed whether a short circuit occurred in the current pass portion (123) of the shape shown in Fig. 11 and whether the reinforcing portion (130) smoked or ignited (see [Table 6]).

[0147] [Table 5] shows the results of measuring whether the current pass section has short circuits, smoke, and ignition when a current of 5 to 40 A flows while increasing the current by 5 A in a case where a reinforcing member (130) is attached to both sides of a current pass section (123) with a width of 1 mm, and [Table 6] shows the results of measuring whether the current pass section has short circuits, smoke, and ignition when a current of 5 to 25 A flows while increasing the current by 5 A in a case where a reinforcing member (130) is attached to both sides of a current pass section (123) with a width of 1 mm and a length (L4) of a cut section (125) of 1 mm. The results of [Table 5] and [Table 6] are the measurement results for a positive electrode non-conductive section (120) with a length (vertical) of 50 mm × a width (horizontal) of 20 mm.

[0148] Current (A) 1mm5×10×15×20○25○30○35○40○

[0149] Referring to [Table 5], when a reinforcing member (130) was attached to both sides of a current pass section (123) with a width of 1 mm, a short circuit occurred when a current of 20 to 40 A flowed, but no smoking or ignition occurred in the reinforcing member (130). In addition, the reinforcing member (130) maintained its intact shape at all current values ​​of 5 to 40 A.

[0150] Current (A) 1mm5×10○15○20○25○

[0151] Referring to [Table 6], when a reinforcing member (130) was attached to both sides of a current pass section (123) with a width of 1 mm, a short circuit occurred when a current of 10 to 25 A flowed, but no smoking or ignition occurred in the reinforcing member (130). In addition, the reinforcing member (130) maintained its intact shape at all current values ​​of 5 to 25 A, and the current pass section (123) also maintained its intact shape.

[0152] Referring to the results of [Table 1] to [Table 6], it can be seen that the current collector (100) for an electrode having a fuse-integrated non-conductive portion according to the present invention can exhibit a fuse function for blocking short-circuit current by forming a current pass portion (123) having a width of 1 to 5 mm in the non-conductive portion (120), and safety can also be secured by attaching a reinforcing portion (130) to at least one surface of the current pass portion (123).

[0153] (4) Experiment 4

[0154] In Experiment 4, it was confirmed whether the current pass section (123) of the anode non-conductive portion (120) made of aluminum metal foil was broken when folded 180 degrees. [Table 7] shows the experimental results when a reinforcing portion (130) was attached to one side of the current pass section with a width of 1 mm, 3 mm, and 5 mm, and [Table 8] shows the experimental results when a reinforcing portion (130) was attached to both sides of the current pass section with a width of 1 mm, 3 mm, and 5 mm.

[0155] No1mm3mm5mm1××○2×○○3×○○4××○5×○○6×○○7×××8×○○9××○10×

[0156] Referring to [Table 7], when the width of the current pass section was 1 mm, it broke in all 10 experiments. When the width of the current pass section was 3 mm, it broke in 4 out of 9 experiments, but did not break in 5 experiments and conducted current even when folded repeatedly more than 10 times. When the width of the current pass section was 5 mm, it broke in only 1 out of 9 experiments, did not break in the remaining 8 experiments and conducted current even when folded repeatedly more than 10 times.

[0157] No1mm3mm5mm1○○○2○○○3○○○4○○○5○○○

[0158] Referring to [Table 8], when reinforcements were attached to both sides of the current pass section, the current pass sections with widths of 1 mm, 3 mm, and 5 mm did not break and conducted current even when folded repeatedly more than 10 times.

[0159] Comparing the results in [Table 7] and [Table 8], it can be seen that when reinforcements are attached to only one side of the current pass section, the greater the width of the current pass section, the greater the strength or rigidity. Furthermore, it can be seen that when reinforcements are attached to both sides of the current pass section, the strength or rigidity of the current pass section can be sufficiently maintained.

[0160] Meanwhile, the secondary battery (1) according to one embodiment of the present invention illustrated in FIGS. 1 and 2 may include an electrode current collector (100, 200) equipped with the aforementioned fuse-integrated non-conductive portion (120, 220).

[0161] As described above, although one embodiment of the present invention has been described with specific details such as specific components and limited examples and drawings, these are provided only to help a more general understanding of the present invention, and the present invention is not limited to the above-described embodiments, and those with ordinary skill in the art to which the present invention pertains can make various modifications and variations based on this description. Therefore, the spirit of the present invention should not be limited to the described embodiments, and all things that are equivalent or equivalent to the claims below as well as the claims are considered to fall within the scope of the spirit of the present invention.

Claims

1. An electrode plate made of a metal material on which an electrode active material is applied or coated; and A non-conductive portion formed at one end of the electrode plate and in which the electrode active material is not present; The above-mentioned department is, It includes a current pass section formed so that the width direction length of the above-mentioned portion is narrower or shorter than other portions, and a cut section formed on one side of the current pass section so that the above-mentioned portion does not exist. An electrode current collector having a fuse-integrated non-conductive portion, characterized in that a reinforcing portion is attached to at least one of the two sides of the non-conductive portion so as to cover at least one of the current pass portion or the cut portion, or so as not to cover all or part of the current pass portion.

2. In paragraph 1, A current collector for an electrode having a fuse-integrated non-conductive portion, characterized in that at least one of the above-mentioned cut portions or the above-mentioned current passing portions is formed along the width direction of the non-conductive portion.

3. In paragraph 2, A current collector for an electrode having a fuse-integrated non-conductive portion, characterized in that the length of the current pass portion in the width direction of the non-conductive portion is formed shorter than the width or length of the cut portion.

4. In paragraph 3, A current collector for an electrode having a fuse-integrated non-conductive portion, characterized in that the current pass portion is formed to be connected to either one of the widthwise ends of the non-conductive portion or is formed in the center portion so as not to be connected to either one of the widthwise ends of the non-conductive portion.

5. In paragraph 3, The above incision is, A current collector for an electrode having a fuse-integrated non-conductive portion characterized in that it is formed on at least one side of the current pass portion along the width direction of the non-conductive portion or is formed in the form of a hole between the current pass portions.

6. In paragraph 5, A current collector for an electrode having a fuse-integrated non-conductive portion, characterized in that the above-mentioned cut portion or the above-mentioned current passing portion is formed near the edge of the electrode plate.

7. In paragraph 1, A current collector for an electrode having a fuse-integrated non-conductive part, characterized in that the above-mentioned cut-out part is formed in a state in which the above-mentioned reinforcing part is provided or attached to at least one side of both sides of the non-conductive part.

8. In paragraph 7, An electrode current collector having a fuse-integrated plain portion, characterized in that the cut portion is formed by removing the plain portion using a laser while the reinforcing portion is provided or attached to at least one of both sides of the plain portion.

9. In paragraph 8, A current collector for an electrode having a fuse-integrated non-conductive portion, characterized in that the above-mentioned reinforcing portion is provided with a transparent tape through which light or laser passes.

10. In paragraph 7, The above reinforcement part, The above current pass section is provided so as to be covered and the above cut section is not covered, A current collector for an electrode characterized in that it is provided with a length corresponding to the width direction length of the non-conductive portion so as to integrally cover the current pass portion and the cut portion.

11. In paragraph 7, A current collector for an electrode, characterized in that the above-mentioned reinforcing part is provided with a heat-resistant tape.

12. A secondary battery including a current collector for an electrode according to Article 7.

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