Secondary battery electrode and method for manufacturing secondary battery electrode

Abstract

Disclosed in an example embodiment are a secondary battery electrode and a method of manufacturing a secondary battery electrode, the secondary battery electrode including: an electrode plate body including a first region and a second region; the active material layer is coated on the first region; the ceramic layer is coated on the second area; a bonding portion formed in the second region; and a tab welded to the bonding portion. In the secondary battery electrode according to the present disclosure, since an electrode plate main body is coated with an active material layer and a ceramic layer, and a bonding portion formed by removing a portion of the ceramic layer is welded to a tab, occurrence of sparks can be prevented in a state in which the electrode plate main body is embedded in a battery cell.

Description

Technical Field

[0001] The present disclosure relates to a secondary battery electrode and a method of manufacturing the secondary battery electrode. Background Art

[0002] Generally, with the rapid growth in demand for portable electronic products such as laptop computers, camcorders, and mobile phones, and the commercialization of robots and electric vehicles, research is being actively conducted to develop high-performance secondary batteries capable of repeated charge / discharge.

[0003] A secondary battery includes an electrode assembly including a pair of electrodes (i.e., a positive electrode and a negative electrode) and a separator disposed between the pair of electrodes. The secondary battery electrode includes, for example, an electrode plate (including a thin metal foil) and an electrode active material coated and cured on one or both side surfaces of the electrode plate.

[0004] In a secondary battery electrode, a region not coated with an electrode active material may be referred to as an uncoated portion, and a region coated with an electrode active material may be referred to as a mixed portion. The uncoated portion may cause a short circuit inside a battery cell.

[0005] The above information disclosed in this Background section is provided to enhance understanding of the background of the present disclosure and therefore it may contain information that does not constitute related (or prior) art. Summary of the invention

[0006] The present disclosure relates to providing a secondary battery electrode in which a coating layer is additionally formed on each of an uncoated portion of a positive electrode and an uncoated portion of a negative electrode, thereby preventing a short circuit and allowing tab welding to be smoothly performed, and a method of manufacturing the secondary battery electrode.

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

[0008] According to one aspect of the present disclosure, a secondary battery electrode is provided, comprising: an electrode plate body including a first region and a second region; an active material layer coated on the first region; a ceramic layer coated on the second region; a bonding portion formed in the second region; and a terminal tab welded to the bonding portion.

[0009] The second region may be provided at each of both sides of the first region.

[0010] The area of ​​the bonding portion may be greater than or equal to the contact area of ​​the terminal piece.

[0011] The secondary battery electrode may further include an insulating gasket configured to cover the coupling portion and the tab.

[0012] The secondary battery electrode may include a processing part configured to process the ceramic layer to form the bonding part.

[0013] The processing unit can process the ceramic layer by laser.

[0014] The secondary battery electrode may include a covering portion configured to cover the second region to form a bonding portion.

[0015] The covering portion may include a covering tape that is attached to the second region and is separated from the second region to form the bonding portion when the ceramic layer is formed.

[0016] The covering part may include a covering pattern part formed in the second region and a covering insertion part inserted into the covering pattern part, and when the ceramic layer is formed, the covering insertion part may be separated from the covering pattern part to form the bonding part.

[0017] According to another aspect of the present disclosure, a method for manufacturing a secondary battery electrode is provided, the method comprising the following steps: applying an active material layer on an electrode plate body; applying (e.g., coating) a ceramic layer on the electrode plate body except the active material layer; forming a joining portion in the ceramic layer, and welding a terminal tab to the joining portion.

[0018] The electrode plate body may include a first region and a second region, the active material layer may be coated on the first region, and the ceramic layer may be coated on the second region disposed at each of both sides of the first region.

[0019] The step of forming the bonding portion in the ceramic layer may include laser processing the ceramic layer to expose the second region to the outside.

[0020] According to another aspect of the present disclosure, a method for manufacturing a secondary battery electrode is provided, the method comprising the following steps: applying an active material layer on an electrode plate body; installing a covering portion on the electrode plate body except the active material layer; applying a ceramic layer on the electrode plate body except the active material layer and the covering portion; separating the covering portion from the electrode plate body to form a joining portion; and welding a terminal tab to the joining portion.

[0021] The step of mounting the cover on the electrode plate body may include attaching a cover tape to the electrode plate body.

[0022] The step of separating the cover part from the electrode plate body may include separating the cover tape from the electrode plate body.

[0023] The step of mounting the covering part on the electrode plate body may include forming a covering pattern part on the electrode plate body and inserting the covering insertion part into the covering pattern part.

[0024] The step of separating the covering part from the electrode plate body may include separating the covering insertion part from the covering pattern part.

[0025] In the secondary battery electrode according to the present disclosure, since the electrode plate body is coated with an active material layer and a ceramic layer, and a joint formed by removing a portion of the ceramic layer is welded to a terminal tab, the occurrence of sparks can be prevented while the electrode plate body is embedded in a battery cell.

[0026] In the method of manufacturing a secondary battery electrode according to the present disclosure, when an active material layer and a ceramic layer are coated on an electrode plate body and then a portion of the ceramic layer is removed by laser processing, a bonding portion welded to a tab may be exposed to the outside.

[0027] In the method of manufacturing a secondary battery electrode according to the present disclosure, after an active material layer is coated on an electrode plate body, a covering portion is installed, and a ceramic layer is coated on the electrode plate body around the covering portion, when the covering portion is removed, the joint welded to the terminal tab can be exposed to the outside.

[0028] According to still another aspect of the present disclosure, a battery pack manufactured using a battery having an improved structure and a vehicle including the battery pack are provided.

[0029] However, effects obtainable by the present disclosure are not limited to the above-mentioned effects, and other technical effects not mentioned will be clearly understood by those skilled in the art from the following description of the present disclosure. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] The accompanying drawings attached to this specification illustrate some embodiments of the present disclosure and, together with the detailed description of the present disclosure, further describe aspects and features of the present disclosure. However, the present disclosure should not be construed as being limited to the accompanying drawings:

[0031] Figure 1 is a schematic plan view showing a secondary battery electrode according to one embodiment of the present disclosure;

[0032] Figure 2 is a schematic cross-sectional view showing a secondary battery electrode according to one embodiment of the present disclosure;

[0033] Figure 3 is a view comparing the widths of a coupling portion and a tab according to an embodiment of the present disclosure;

[0034] Figure 4 is a schematic diagram showing an installation state of an insulating pad according to an embodiment of the present disclosure;

[0035] Figure 5 A schematic diagram illustrating a state in which a bonding portion is formed using a processing portion according to a first embodiment of the present disclosure is shown;

[0036] Figure 6 is a schematic diagram showing a state in which a bonding portion is formed using a cover tape according to a second embodiment of the present disclosure;

[0037] Figure 7 is a schematic diagram showing a state in which a joint portion is formed using a covering insertion portion according to a third embodiment of the present disclosure;

[0038] Figure 8 is a schematic flow chart showing a method of manufacturing a secondary battery electrode according to a first embodiment of the present disclosure;

[0039] Fig. 9 shows a cross-sectional view illustrating a process of manufacturing a secondary battery electrode according to a first embodiment of the present disclosure;

[0040] Fig.10 shows a plan view illustrating a process of manufacturing a secondary battery electrode according to a first embodiment of the present disclosure;

[0041] Fig.11 is a schematic flow chart showing a method of manufacturing a secondary battery electrode according to the second embodiment and the third embodiment of the present disclosure;

[0042] Fig.12 shows a cross-sectional view illustrating a process of manufacturing a secondary battery electrode according to a second embodiment of the present disclosure;

[0043] Fig.13 shows a plan view illustrating a process of manufacturing a secondary battery electrode according to a second embodiment of the present disclosure;

[0044] Fig.14 shows a cross-sectional view illustrating a process of manufacturing a secondary battery electrode according to a third embodiment of the present disclosure; and

[0045] Fig.15 A plan view illustrating a process of manufacturing a secondary battery electrode according to a third embodiment of the present disclosure is shown. DETAILED DESCRIPTION

[0046] Some embodiments of the present disclosure will be described in further detail herein with reference to the accompanying drawings. The terms or words used in this specification and claims should not be interpreted as limited to the ordinary meaning or dictionary meaning, but should be interpreted as meanings and concepts consistent with the technical concept of the present disclosure based on the principle that the inventor can be his / her own lexicon compiler to appropriately define the concept of the term.

[0047] The embodiments described in this specification and the configurations shown in the accompanying drawings are provided as some exemplary embodiments of the present disclosure, and do not represent all technical ideas, aspects and features of the present disclosure. Therefore, it will be understood that when submitting this application, there may be various equivalents and modifications that can replace or modify the embodiments described herein.

[0048] It will be understood that when an element or layer is referred to as being "on," "connected to," or "coupled to" another element or layer, it may be directly on, directly connected to, or directly coupled to the other element or layer, or one or more intervening elements or layers may also be present. When an element or layer is referred to as being "directly on," "directly connected to," or "directly coupled to" another element or layer, there are no intervening elements or layers. For example, when a first element is described as being "coupled to" or "coupled to" a second element, the first element may be directly coupled or coupled to the second element, or the first element may be indirectly coupled or coupled to the second element via one or more intervening elements.

[0049] In the accompanying drawings, for the clarity of the illustration, the sizes of various elements, layers, etc. are exaggerated. The same reference numerals represent the same or similar elements. As used herein, the term "and / or" includes any combination and all combinations of one or more of the related listed items. In addition, when describing the embodiments of the present disclosure, "may" is used to relate to "one or more embodiments of the present disclosure". Expressions such as "at least one (kind / person) in ... " and "any one (kind / person) in ... " modify the entire row of elements when they are after a row of elements, rather than modifying the single element in the row. When phrases such as "at least one (kind / person) in A, B and C", "at least one (kind / person) in A, B or C", "at least one (kind / person) selected from the group of A, B and C" or "at least one (kind / person) selected from A, B and C" are used to specify a row of elements A, B and C, the phrase can refer to any suitable combination or subset of A, B and C and all suitable combinations or subsets, such as A, B, C, A and B, A and C, B and C, or A and B and C. As used herein, the term "use" and variations thereof may be considered synonymous with the term "utilize" and variations thereof, respectively. As used herein, the terms "substantially," "approximately," and similar terms are used as terms of approximation rather than terms of degree, and are intended to take into account the inherent deviations of measurements or calculations that one of ordinary skill in the art would recognize.

[0050] It will be understood that although the terms "first", "second", "third", etc. may be used herein to describe various elements, components, regions, layers and / or parts, these elements, components, regions, layers and / or parts should not be limited by these terms. These terms are used to distinguish one element, component, region, layer or part from another element, component, region, layer or part. Therefore, without departing from the teachings of the exemplary embodiments, the first element, first component, first region, first layer or first part discussed below may be referred to as a second element, second component, second region, second layer or second part.

[0051] For ease of description, spatially relative terms such as "below," "beneath," "below," "above," "on," and the like may be used herein to describe the relationship of one element or feature to another element or feature as shown in the accompanying drawings. It will be understood that in addition to covering the orientations depicted in the accompanying drawings, the spatially relative terms are intended to cover different orientations of the device in use or operation. For example, if the device in the accompanying drawings is turned over, elements described as being "below" or "beneath" other elements or features will be oriented as being "above" or "on" the other elements or features. Thus, the term "below" may cover both above and below orientations. The device may be otherwise oriented (e.g., rotated 90 degrees or in other orientations), and the spatially relative descriptors used herein should be interpreted accordingly.

[0052] The terms used herein are for the purpose of describing the embodiments of the present disclosure, and are not intended to limit the present disclosure. As used herein, the singular forms "one" and "an" are intended to include plural forms, unless the context clearly states otherwise. It will be understood that when the terms "include", "comprise" and / or variations thereof are used in this specification, the features, wholes, steps, operations, elements and / or components stated are indicated, but the presence or addition of one or more other features, wholes, steps, operations, elements, components and / or their groups is not excluded.

[0053] In addition, any numerical range disclosed and / or described herein is intended to include all sub-ranges of the same numerical precision contained in the described range. For example, the range of "1.0 to 10.0" is intended to include all sub-ranges between (and including) the described minimum value 1.0 and the described maximum value 10.0, that is, having a minimum value equal to or greater than 1.0 and a maximum value equal to or less than 10.0, such as 2.4 to 7.6. Any maximum numerical limit described herein is intended to include all lower numerical limits contained therein, and any minimum numerical limit described in this specification is intended to include all higher numerical limits contained therein. Therefore, the applicant reserves the right to amend this specification and the claims to explicitly describe any sub-ranges contained in the range explicitly described herein.

[0054] Referring to two compared elements, features, etc. as "the same" may mean that they are "substantially the same." Thus, the phrase "substantially the same" may include situations with deviations that are considered low in the art, for example, 5% or less. Additionally, when a parameter is referred to as being uniform in a given area, it may mean that the parameter is uniform with respect to an average value.

[0055] Throughout the specification, unless otherwise specified, each element may be in the singular or in the plural.

[0056] When any element is referred to as being disposed (or located or positioned) "on (or below)" or "on (or below)" a component, it may mean that the arbitrary element is placed in contact with the upper (or lower) surface of the component, and may also mean that another component may be placed between the component and the arbitrary element disposed (or located or positioned) on (or below) the component.

[0057] In addition, it will be understood that when an element is referred to as being "coupled," "linked," or "connected" to another element, the elements may be directly "coupled," "linked," or "connected" to each other, or one or more intervening elements may be present therebetween, through which the element may be "coupled," "linked," or "connected" to the other element. In addition, when a component is referred to as being "electrically coupled" to another component, the component may be directly electrically connected to the other component, or one or more intervening components may be present therebetween so that the component and the other component are indirectly electrically connected to each other.

[0058] Throughout the specification, when "A and / or B" is stated, it means A, B, or A and B, unless otherwise stated. That is, "and / or" includes any combination or all combinations of the listed multiple items. When "C to D" is stated, it means C or greater and D or less, unless otherwise stated.

[0059] Figure 1 is a schematic plan view showing a secondary battery electrode according to one embodiment of the present disclosure. Figure 2 is a schematic cross-sectional view showing a secondary battery electrode according to one embodiment of the present disclosure. Figure 1 and Figure 2 , a secondary battery electrode 1 according to one embodiment of the present disclosure includes an electrode plate body 10 , an active material layer 20 , a ceramic layer 30 , a bonding part 40 , and a terminal tab 50 .

[0060] The electrode plate body 10 may include a first region 11 and a second region 12. The electrode plate body 10 may be a positive electrode plate or a negative electrode plate of a secondary battery. The electrode plate body 10 may be a thin metal plate made of a material such as aluminum or copper. The first region 11 and the second region 12 may be separated in the left and right longitudinal directions of the electrode plate body 10. The second region 12 may be disposed at each of the left and right sides of the first region 11.

[0061] The active material layer 20 may be coated on the first region 11. An active material slurry may be coated on the first region 11 to form the active material layer 20. The active material layer 20 may be coated on one or more surfaces of the first region 11. When the electrode plate body 10 is a positive electrode plate, the electrode plate body 10 may be coated with a positive electrode active material, and when the electrode plate body 10 is a negative electrode plate, the electrode plate body 10 may be coated with a negative electrode active material.

[0062] The ceramic layer 30 may be coated on the second region 12. Ceramic slurry may be coated on the second region 12 to form the ceramic layer 30. In addition, the ceramic layer 30 may be formed by coating a non-conductive material on the second region 12.

[0063] The bonding part 40 may be formed in the second region 12. The bonding part 40 may be formed in a portion of the second region 12. The bonding part 40 may be a region where the ceramic layer 30 is removed from the second region 12. The ceramic layer 30 may not be coated on the bonding part 40, so the bonding part 40 may be exposed to the outside. The bonding part 40 may extend to the end of the electrode plate body 10. Except for the bonding part 40, the entire electrode plate body 10 may be coated with the active material layer 20 and the ceramic layer 30.

[0064] The tab 50 may be welded to the joint portion 40. As an example, the tab 50 may be directly welded to the joint portion 40 exposed to the outside to maintain the joint state. When the electrode plate body 10 is a positive electrode plate, a positive electrode tab may be joined, and when the electrode plate body 10 is a negative electrode plate, a negative electrode tab may be joined.

[0065] Figure 3is a diagram comparing the widths of a joint portion and a terminal block according to an embodiment of the present disclosure. Figure 3 , the area of ​​the joint portion 40 can be designed to be larger than the contact area of ​​the terminal piece 50. That is, the width a of the joint portion 40 can be designed to be larger than or equal to the width b of the terminal piece 50. Therefore, the entire joint portion of the terminal piece 50 that contacts the joint portion 40 can be welded.

[0066] Figure 4 is a schematic diagram showing the installation state of an insulating pad according to an embodiment of the present disclosure. Figure 4 , the secondary battery electrode 1 according to one embodiment of the present disclosure may further include an insulating pad 60. The insulating pad 60 may cover the joint 40 and the terminal tab 50. The insulating pad 60 may cover the gap space between the joint 40 and the terminal tab 50, or may cover the joint 40 while covering the terminal tab 50. The distance c from the electrode plate body 10 to the insulating pad 60 may correspond to the thickness d of the ceramic layer 30.

[0067] Figure 5 A schematic diagram illustrating a state in which a bonding portion is formed by a processing portion according to a first embodiment of the present disclosure is shown. Figure 5 , the processing part 70 may process the ceramic layer 30 to form the coupling part 40. More specifically, the processing part 70 may be a laser etcher that forms the coupling part 40 by etching the ceramic layer 30 through laser processing. In addition, the coupling part 40 may be formed by removing a portion of the ceramic layer 30 through various etching units.

[0068] Figure 6 is a schematic diagram illustrating a state in which a bonding portion is formed using a cover tape according to a second embodiment of the present disclosure. Figure 7 2 is a schematic diagram showing a state in which a joint portion is formed using a covering insertion portion according to a third embodiment of the present disclosure. Figure 6 and Figure 7 , the covering portion 80 may cover the second region 12 to form the bonding portion 40 .

[0069] In the second embodiment of the present disclosure, the cover tape 81 may be attached to the second region 12, and when the ceramic layer 30 is formed, the cover tape 81 may be separated from the second region 12 to form the bonding portion 40. The region where the cover tape 81 is attached to the second region 12 may correspond to the region of the bonding portion 40. The cover tape 81 may be provided with an adhesive and attached to the second region 12, and may include a material into which the ceramic slurry does not penetrate.

[0070] In the third embodiment of the present disclosure, a covering pattern portion 85 may be formed in the second region 12, and a covering insert portion 86 may be inserted into the covering pattern portion 85. The covering pattern portion 85 may be pressed by a pressing unit into a concave-convex shape having protrusions and depressions alternately arranged. In addition, the covering pattern portion 85 may be formed in the second region 12 by forming a plurality of protrusions spaced apart from each other or forming a plurality of depressions spaced apart from each other. The covering insert portion 86 may have a shape corresponding to the covering pattern portion 85 to be inserted into the covering pattern portion 85. The covering insert portion 86 may be made of an elastic material and may be assembled into a depression formed in the covering pattern portion 85 and combined with a depression formed in the covering pattern portion 85. On the other hand, the protrusion of the covering pattern portion 85 may be assembled and inserted into a depression formed in the covering insert portion 86.

[0071] When the ceramic layer 30 is formed after the covering insert portion 86 is inserted into the covering pattern portion 85, the covering insert portion 86 may be separated from the covering pattern portion 85 to form the bonding portion 40. The length of the covering insert portion 86 may be designed to be greater than the length of the covering pattern portion 85. Therefore, a worker or a working robot may remove the covering insert portion 86 from the covering pattern portion 85 by grasping the end of the covering insert portion 86 and then moving the covering insert portion 86.

[0072] Figure 8 is a schematic flowchart illustrating a method of manufacturing a secondary battery electrode according to a first embodiment of the present disclosure. Fig. 9 A cross-sectional view illustrating a process of manufacturing a secondary battery electrode according to the first embodiment of the present disclosure is shown. Fig.10 A plan view illustrating a process of manufacturing a secondary battery electrode according to a first embodiment of the present disclosure is shown. Figures 8 to 10 A method of manufacturing a secondary battery electrode according to a first embodiment of the present disclosure is described.

[0073] In the active material coating operation S110 , an active material layer 20 may be coated on the electrode plate body 10 . The electrode plate body 10 may be divided into a first region 11 and a second region 12 in a longitudinal direction, and an active material may be coated on the first region 11 to form the active material layer 20 .

[0074] Meanwhile, the second region 12 may be provided at each of both sides of the first region 11. That is, the electrode plate body 10 may be divided into the second region 12, the first region 11, and the second region 12 in the longitudinal direction.

[0075] In the ceramic coating operation S120, the ceramic layer 30 may be coated on the electrode plate body 10 except the active material layer 20. The ceramic layer 30 may be formed by coating ceramic on the second region 12.

[0076] In the processing operation S130, the coupling part 40 may be formed in the ceramic layer 30. When the processing part 70 removes a portion of the ceramic layer 30, the electrode plate body 10 may be exposed to form the coupling part 40. When the processing part 70 etches a portion of the ceramic layer 30 by laser processing, a portion of the second region 12 of the electrode plate body 10 may be exposed to the outside.

[0077] In the welding operation S140, the tab 50 may be welded to the coupling part 40. The tab 50 may be in surface contact with the coupling part 40, and the surface contact part may maintain a state of being coupled by welding.

[0078] Fig.11 is a schematic flowchart illustrating a method of manufacturing a secondary battery electrode according to the second embodiment and the third embodiment of the present disclosure. Fig.12 A cross-sectional view illustrating a process of manufacturing a secondary battery electrode according to a second embodiment of the present disclosure is shown. Fig.13 A plan view illustrating a process of manufacturing a secondary battery electrode according to a second embodiment of the present disclosure is shown. Fig.14 A cross-sectional view illustrating a process of manufacturing a secondary battery electrode according to a third embodiment of the present disclosure is shown. Fig.15 A plan view illustrating a process of manufacturing a secondary battery electrode according to a third embodiment of the present disclosure is shown.

[0079] The following will refer to Figures 11 to 13 A method of manufacturing a secondary battery electrode according to a second embodiment of the present disclosure is described.

[0080] In the active material coating operation S210 , an active material layer 20 may be coated on the electrode plate body 10 . The electrode plate body 10 may be divided into a first region 11 and a second region 12 in a longitudinal direction, and an active material may be coated on the first region 11 to form the active material layer 20 .

[0081] Meanwhile, the second region 12 may be provided at each of both sides of the first region 11. That is, the electrode plate body 10 may be divided into the second region 12, the first region 11, and the second region 12 in the longitudinal direction.

[0082] In the cover mounting operation S220, the cover part 80 may be mounted on the electrode plate body 10 except the active material layer 20. A cover tape 81 as an example of the cover part 80 may be attached to the second region 12.

[0083] In the ceramic coating operation S230, the ceramic layer 30 may be coated on the electrode plate body 10 except the active material layer 20 and the cover 80. The ceramic layer 30 may be formed by coating ceramic on the second region 12 except the cover tape 81.

[0084] In the cover separation operation S240, the cover part 80 may be separated from the electrode plate body 10 to form the bonding part 40. The cover tape 81 may be separated from the electrode plate body 10 manually or by a robot, and the area from which the cover tape 81 is removed may become the bonding part 40.

[0085] In the welding operation S250, the tab 50 may be welded to the coupling part 40. The tab 50 may be in surface contact with the coupling part 40, and the surface contact part may maintain a state of being coupled by welding.

[0086] The following will refer to Fig.11 , Fig.14 and Fig.15 A method of manufacturing a secondary battery electrode according to a third embodiment of the present disclosure is described.

[0087] In the active material coating operation S310 , an active material layer 20 may be coated on the electrode plate body 10 . The electrode plate body 10 may be divided into a first region 11 and a second region 12 in a longitudinal direction, and an active material may be coated on the first region 11 to form the active material layer 20 .

[0088] Meanwhile, the second region 12 may be provided at each of both sides of the first region 11. That is, the electrode plate body 10 may be divided into the second region 12, the first region 11, and the second region 12 in the longitudinal direction.

[0089] In the cover mounting operation S320, the cover part 80 may be mounted on the electrode plate body 10 except the active material layer 20. The cover mounting operation S320 may include a pattern forming operation S321 and a pattern inserting operation S322.

[0090] In the pattern forming operation S321, a covering pattern part 85 may be formed on the electrode plate body 10. The covering pattern part 85 may be a region where a concavo-convex pattern is formed in a portion of the second region 12 by a separate pattern forming machine.

[0091] In the pattern inserting operation S322, the covering inserting part 86 may be inserted into the covering pattern part 85. The covering inserting part 86 may include a buffer material and may cover the entire covering pattern part 85. The covering inserting part 86 may be inserted or pressed into a recessed portion of the covering pattern part 85 to stably maintain a temporarily fixed state.

[0092] In the ceramic coating operation S330, the ceramic layer 30 may be coated on the electrode plate body 10 except the active material layer 20 and the cover part 80. Ceramic may be coated on the second region 12 except the cover insertion part 86 inserted into the cover pattern part 85, thereby forming the ceramic layer 30.

[0093] In the cover separation operation S340, the cover part 80 may be separated from the electrode plate body 10 to form the bonding part 40. The cover insert part 86 may be separated from the cover pattern part 85 manually or by a robot, and the cover pattern part 85 from which the cover insert part 86 is removed may become the bonding part 40.

[0094] In the welding operation S350, the tab 50 may be welded to the bonding portion 40. The tab 50 may be in surface contact with the bonding portion 40, and the surface contact portion may maintain a state of being bonded by welding. In this case, the contact area between the tab 50 and the covering pattern portion 85 may be increased, thereby improving the bonding force.

[0095] In the secondary battery electrode 1 according to the present disclosure, since the electrode plate body 10 is coated with the active material layer 20 and the ceramic layer 30, and the bonding portion 40 formed by removing a portion of the ceramic layer 30 is welded to the terminal tab 50, the occurrence of sparks can be prevented when the electrode plate body 10 is embedded in the battery cell.

[0096] In the method of manufacturing a secondary battery electrode according to the present disclosure, when the active material layer 20 and the ceramic layer 30 are coated on the electrode plate body 10 and then a portion of the ceramic layer 30 is removed by laser processing, the coupling portion 40 welded to the tab 50 may be exposed to the outside.

[0097] In the method of manufacturing a secondary battery electrode according to the present disclosure, after the active material layer 20 is applied on the electrode plate body 10, the covering portion 80 is installed, and the ceramic layer 30 is applied on the electrode plate body 10 around the covering portion 80, when the covering portion 80 is removed, the bonding portion 40 welded to the terminal tab 50 can be exposed to the outside.

[0098] Although the present invention has been described with reference to the embodiments and the accompanying drawings showing aspects of the present invention, the present invention is not limited thereto. A person skilled in the art to which the present invention pertains may make various modifications and changes within the scope of the technical spirit of the present invention.

Claims

1. A secondary battery electrode, comprising: The electrode plate body includes a first region and a second region; an active material layer, coated on the first region; a ceramic layer coated on the second region; a bonding portion formed in the second region; as well as A terminal lug is welded to the joint portion.

2. The secondary battery electrode according to claim 1, wherein: The second region is disposed at each of both sides of the first region.

3. The secondary battery electrode according to claim 1, wherein: The area of ​​the combined portion is greater than or equal to the contact area of ​​the wiring piece. 4 . The secondary battery electrode according to claim 1 , further comprising an insulating gasket configured to cover the coupling portion and the tab. 5 . The secondary battery electrode according to claim 1 , comprising a processing portion configured to process the ceramic layer to form the bonding portion.

6. The secondary battery electrode according to claim 5, wherein: The processing unit processes the ceramic layer by laser. 7 . The secondary battery electrode according to claim 1 , comprising a covering portion configured to cover the second region to form the bonding portion.

8. The secondary battery electrode according to claim 7, wherein: The covering portion includes a covering tape that is attached to the second region and is separated from the second region to form the bonding portion when the ceramic layer is formed.

9. The secondary battery electrode according to claim 7, wherein: The covering portion includes a covering pattern portion formed in the second region and a covering insertion portion inserted into the covering pattern portion, and When the ceramic layer is formed, the covering insertion part is separated from the covering pattern part to form the coupling part.

10. A method for manufacturing a secondary battery electrode, the method comprising the following steps: Applying the active material layer on the electrode plate body; Applying a ceramic layer on the electrode plate body except the active material layer; forming a bonding portion in the ceramic layer; and A terminal lug is welded to the joint.

11. The method according to claim 10, wherein: The electrode plate body includes a first region and a second region, The active material layer is coated on the first region, and The ceramic layer is coated on the second region disposed at each of both sides of the first region.

12. The method according to claim 11, wherein: The step of forming the bonding portion in the ceramic layer includes laser processing the ceramic layer to expose the second region to the outside.

13. A method for manufacturing a secondary battery electrode, the method comprising the following steps: Applying the active material layer on the electrode plate body; installing a covering portion on the electrode plate body except for the active material layer; applying a ceramic layer on the electrode plate body except the active material layer and the covering portion; separating the covering portion from the electrode plate body to form a joint portion; as well as A terminal lug is welded to the joint.

14. The method according to claim 13, wherein: The step of mounting the cover on the electrode plate body includes attaching a cover tape to the electrode plate body.

15. The method according to claim 14, wherein: The step of separating the cover portion from the electrode plate body includes separating the cover tape from the electrode plate body.

16. The method according to claim 13, wherein: The step of mounting the covering part on the electrode plate body includes forming a covering pattern part on the electrode plate body and inserting a covering insertion part into the covering pattern part.

17. The method according to claim 16, wherein: The step of separating the covering portion from the electrode plate body includes separating the covering insertion portion from the covering pattern portion.

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