Slotting device and battery electrode and battery module manufactured by slotting device

Abstract

The embodiment of the invention discloses a slotting device, a battery electrode manufactured by the slotting device and a battery module. The grooving apparatus includes a mold configured to support an electrode, a first stripper that moves toward the mold and presses a mixture portion of the electrode, a second stripper that moves toward the mold and presses an uncoated portion of the electrode, and a pattern portion that moves toward the mold and forms a pattern on the uncoated portion. According to one embodiment of the present disclosure, a contact area and a bonding force between uncoated portions are increased by a pattern formed on the uncoated portions, thereby improving weldability thereof.

Description

Technical Field

[0001] The present disclosure relates to a notching device and a battery electrode and a battery module manufactured by the notching device. 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 actively being 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 applied and cured on one or both side surfaces of the electrode plate.

[0004] In a secondary battery electrode, an area on which an electrode active material is not applied may be referred to as an uncoated portion, and an area on which an electrode active material is applied may be referred to as a mixture portion. In order to reduce the thickness of the electrode active material applied on the electrode plate, the electrode active material is rolled, and the rolled electrode active material is solidified.

[0005] The secondary battery electrode is grooved to form the tabs, but the close contact of the weld between the tabs or between the tab and the current collector is reduced and the welding area is narrow, which may cause welding defects.

[0006] 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

[0007] The present disclosure is directed to providing a notching device in which a secondary battery electrode is notched to process an uncoated portion of the secondary battery electrode and to form a tab on the secondary battery electrode, thereby increasing a welding area to improve weldability, and a battery electrode manufactured by the notching device.

[0008] 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.

[0009] According to aspects of the present disclosure, a notching device is provided, which includes: a mold configured to support an electrode; a first stripper moving toward the mold and pressing a mixture portion of the electrode; a second stripper moving toward the mold and pressing an uncoated portion of the electrode; and a pattern portion moving toward the mold and forming a pattern on the uncoated portion.

[0010] The second peeler may be connected to the first peeler to interlock with the first peeler.

[0011] The pattern part may be formed on the second peeler.

[0012] The pattern part may be attachable to or detachable from the second peeler.

[0013] The pattern part may include: a pattern body assembled to the second peeler; and a pattern protrusion formed on a lower portion of the pattern body and configured to form a pattern on the non-coating portion.

[0014] The pattern body may include: a body insertion portion slidably inserted into a second groove formed in the second stripper; and a body base portion formed at the body insertion portion, in close contact with a bottom surface of the second stripper, and having a lower portion on which a pattern protrusion is formed.

[0015] The second groove may include: a second groove penetration portion passing through a lower portion of the second stripper; and a second groove extension portion extending from the second groove penetration portion to a bottom surface of the second stripper, and a width of the second groove penetration portion may be formed to be greater than a width of the second groove extension portion.

[0016] The body insert portion may include an insertion penetration portion inserted into the second groove penetration portion to be supported in the second groove penetration portion, and an insertion extension portion extending from the insertion penetration portion to be inserted into the second groove extension portion and connected to the body base portion.

[0017] The main body insertion portion may further include an insertion guide portion installed on the insertion penetration portion and configured to guide the main body base portion to be in close contact with a lower portion of the second stripper.

[0018] The insertion guide portion may include: a variable guide portion installed on a bottom surface of the insertion penetration portion and having a length variable by an elastic force; and a guide roller portion rotatably installed on the variable guide portion and movable along the second groove penetration portion.

[0019] The pattern body may further include a body stopper mounted on the second peeler and configured to limit movement of the body base portion.

[0020] The main body stopper may include: a first stopper disposed on an upper side of the second stripper; a second stopper extending downward from the first stopper and limiting movement of at least one of the main body insertion portion and the main body base portion; and a third stopper configured to fix the first stopper to the second stripper.

[0021] The pattern may have a concave-convex shape.

[0022] The groove forming device may further include a support portion formed on the mold and configured to support the non-coating portion so that the pattern is formed on the non-coating portion.

[0023] According to another aspect of the present disclosure, a battery electrode manufactured by a groove forming apparatus is provided.

[0024] The battery electrode may include: a mixture portion, which is pressed by a first stripper and on which an active material is applied; an uncoated portion, which extends from the mixture portion and is pressed by a second stripper and on which no active material is applied; and an area increasing portion, which is formed on the uncoated portion and is pressed by a pattern portion to form a pattern.

[0025] The area increasing portion may be formed at a portion of the non-coating portion to increase the contact area.

[0026] The area increasing portion may have a concavo-convex shape.

[0027] A plurality of mixture portions may be stacked, and the area increasing portions provided on the non-coating portions extending from the mixture portions may be bonded to each other by welding.

[0028] According to yet another aspect of the present disclosure, a battery module manufactured by the notching apparatus and including a battery electrode is provided.

[0029] 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.

[0030] In the notching device and the battery electrode manufactured by the notching device according to one embodiment of the present disclosure, the contact area and the bonding force between the non-coating parts are increased by the patterns formed on the non-coating parts, thereby improving the weldability thereof.

[0031] In the notching apparatus and the battery electrode manufactured by the notching apparatus according to one embodiment of the present disclosure, the pattern part is attached to or detached from the second peeling tool to replace the pattern part, thereby realizing patterns having various shapes.

[0032] However, effects obtainable by the present disclosure are not limited to the above effects, and other technical effects not mentioned will be clearly understood by those skilled in the art through the following description of the present disclosure. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] 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 interpreted as being limited to the accompanying drawings, in which:

[0034] Figure 1 is a schematic diagram showing a slotting device according to an embodiment of the present disclosure;

[0035] Figure 2 is a schematic diagram showing a state before a first peeler and a second peeler press an electrode according to an embodiment of the present disclosure;

[0036] Figure 3 It shows that Figure 2 A schematic diagram of a state in which a first stripper and a second stripper are interlocked with each other to press an electrode;

[0037] Figure 4 is a schematic diagram showing a second stripper according to an embodiment of the present disclosure;

[0038] Figure 5 is a schematic diagram showing a pattern portion according to an embodiment of the present disclosure;

[0039] Figure 6 is a schematic diagram showing a state in which a pattern part is assembled to a second stripper according to one embodiment of the present disclosure;

[0040] Figure 7 is a schematic diagram showing a state in which an insertion guide portion is added to a main body insertion portion and a pattern portion is in close contact with a second stripper according to one embodiment of the present invention;

[0041] Figure 8 is a schematic diagram showing an insertion guide according to an embodiment of the present disclosure;

[0042] Fig. 9 is a schematic diagram showing a state in which a main body stopper restricts movement of a main body base portion according to an embodiment of the present disclosure;

[0043] Fig.10 is a schematic diagram showing a pattern formed on an uncoated portion by a pattern portion according to an embodiment of the present disclosure;

[0044] Fig.11 is a schematic diagram showing a support portion according to an embodiment of the present disclosure;

[0045] Fig.12 is a schematic diagram showing a battery electrode manufactured by a groove opening device according to an embodiment of the present disclosure;

[0046] Fig.13 is a schematic diagram showing a battery module manufactured by a slotting device according to an embodiment of the present disclosure;

[0047] Fig.14 It shows Fig.13 A schematic diagram of a bonding state between uncoated parts in FIG. 1 ; and

[0048] Fig.15 It shows Fig.13 Schematic diagram of the bonding between the uncoated portion and the electrode tab. DETAILED DESCRIPTION

[0049] Here, some embodiments of the present disclosure will be described in further detail 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, and 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.

[0050] The embodiments described in this specification and the configurations shown in the accompanying drawings are provided as some example embodiments of the present disclosure and do not represent all of the technical ideas, aspects and features of the present disclosure. Therefore, it will be understood that when filing this application, there may be various equivalents and modifications that can replace or modify the embodiments described herein.

[0051] 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 to or directly coupled to the second element, or the first element may be indirectly coupled to or indirectly coupled to the second element via one or more intervening elements.

[0052] In the accompanying drawings, for clarity, the sizes of various elements, layers, etc. can be 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 relevant listed items. In addition, when describing the embodiments of the present disclosure, the use of "may (may)" refers 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 (elements) before / after a row of elements (elements), without modifying the individual elements (elements) in the row. When phrases such as "at least one (kind / person) in A, B and 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 (elements) A, B and C, the phrase can refer to any and all suitable combinations or subsets of A, B and C, such as A, B, C, A and B, A and C, B and C or A and B and C. As used herein, the term "use" and variations thereof may be considered synonymous with the term "utilize" and variations thereof, respectively. As used herein, the terms "substantially," "about," and similar terms are used as terms of approximation rather than terms of degree, and are intended to take into account the inherent variations in measured or calculated values ​​that one of ordinary skill in the art would recognize.

[0053] 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, component, region, layer or part discussed below may be referred to as a second element, component, region, layer or part.

[0054] For ease of description, spatially relative terms such as "under", "below", "below", "above", "on", etc. may be used herein to describe the relationship of one element or feature to another (other) element or feature as shown in the drawings. It will be understood that the spatially relative terms are intended to cover different orientations of the device in use or operation in addition to the orientation depicted in the drawings. For example, if the device in the drawings is turned over, the elements described as "under" or "below" other elements or features will then be oriented to be "above" or "on" the other elements or features. Therefore, the term "under" can cover both above and below. The device can be oriented in other ways (e.g., rotated 90 degrees or in other orientations), and the spatially relative descriptors used herein should be interpreted accordingly.

[0055] 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, unless the context clearly states otherwise, the singular forms "one" and "one (kind / person)" are also intended to include plural forms. It will also be understood that when used in this specification, the terms "include", "comprise" and / or its variations indicate the presence of stated features, integral bodies, steps, operations, elements and / or components, but do not exclude the presence or addition of one or more other features, integral bodies, steps, operations, elements, components and / or their groups.

[0056] In addition, any numerical range disclosed and / or listed herein is intended to include all sub-ranges of the same numerical precision contained in the listed range. For example, the range of "1.0 to 10.0" is intended to include all sub-ranges between the listed minimum value 1.0 and the listed maximum value 10.0 (including the listed minimum value 1.0 and the listed 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 listed here is intended to include all lower numerical limits contained therein, and any minimum numerical limit listed in this specification is intended to include all higher numerical limits contained therein. Therefore, the applicant reserves the right to modify this specification (including claims) to explicitly list any sub-ranges contained in the range explicitly listed here.

[0057] Referring to two contrasting 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 (e.g., 5% or less). Additionally, when a parameter is referred to as being consistent in a given area, it may mean that it is consistent in terms of average value.

[0058] Throughout the specification, unless otherwise specified, each element may be in the singular or in the plural.

[0059] 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 any arbitrary element disposed (or located or positioned) on (or below) the component.

[0060] 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, such that the component and the other component are indirectly electrically connected to each other.

[0061] Throughout the specification, unless otherwise specified, when "A and / or B" is stated, it means A, B, or A and B. That is, "and / or" includes any combination or all combinations of the listed multiple items. When "C to D" is stated, unless otherwise specified, it means C or greater and D or less.

[0062] Figure 1 Schematic diagram showing a slotting device according to an embodiment of the present disclosure. Figure 2 is a schematic diagram showing a state before a first peeler and a second peeler press an electrode according to an embodiment of the present disclosure. Figure 3 It shows that Figure 2 Schematic diagram of a state in which the first peeler and the second peeler are interlocked with each other to press the electrode. Figures 1 to 3 , a notching device 1 according to one embodiment of the present disclosure includes a mold 10, a first stripper 20, a second stripper 30, and a pattern part 40. The notching device 1 can notch and process a battery electrode 90 including a mixture part 91 and an uncoated part 92. The mixture part 91 can be formed by applying an active material layer on both side surfaces or one side surface of the battery electrode 90.

[0063] The mold 10 may support the battery electrode 90. The mold 10 may have a flat upper side so that the battery electrode 90 is seated on the mold 10. A punching hole recessed as a step is formed around the mold 10, and a notching process may be performed to punch and remove a portion of the uncoated portion 92.

[0064] The first stripper 20 may move toward the mold 10 and may press the mixture portion 91 of the battery electrode 90. The first stripper 20 may be disposed above the mold 10 and may be vertically moved by a separate lifter. When the first stripper 20 is lowered and presses the mixture portion 91, the mixture portion 91 may be fixed by the mold 10 and the first stripper 20.

[0065] The second stripper 30 may move toward the mold 10 and may press the uncoated portion 92 of the battery electrode 90. The second stripper 30 may be disposed above the mold 10 and may be vertically moved by a separate lifter. Meanwhile, a plurality of wrinkles formed during the rolling and curing process of the active material may be distributed on the uncoated portion 92 before grooving, and the wrinkles may be removed by the second stripper 30.

[0066] The pattern part 40 may be moved toward the mold 10 and may form a pattern on the uncoated portion 92. The pattern part 40 may be formed integrally with the second stripper 30 or may be connected to the second stripper 30. The pattern part 40 may be interlocked with the second stripper 30. A protrusion may be formed on the pattern part 40 to form a concave-convex shape on the uncoated portion 92. The pattern of the uncoated portion 92 may improve weldability by expanding a contact area with the uncoated portion 92 during a welding process.

[0067] The second peeler 30 may be interlocked with the first peeler 20. The second peeler 30 may be coupled to a side surface of the first peeler 20. In addition, the second peeler 30 may be integrally formed with the first peeler 20.

[0068] The pattern part 40 may be formed on the second stripper 30. The second stripper 30 has a block shape pressing the non-coating portion 92, and the pattern part 40 may be formed on a portion of the second stripper 30. More specifically, the pattern part 40 may be coupled to the second stripper 30 such that a pattern is formed by limiting the pattern to a welding area of ​​the non-coating portion 92.

[0069] Figure 4 is a schematic diagram showing a second stripper according to an embodiment of the present disclosure. Figure 5 is a schematic diagram showing a pattern portion according to an embodiment of the present disclosure. Figure 6 is a schematic diagram of a state in which a pattern part is assembled to a second stripper according to an embodiment of the present disclosure. Figures 4 to 6 , the pattern part 40 may be attached to or detachable from the second peeler 30. That is, the pattern part 40 may be selectively assembled to the second peeler 30 to form the uncoated part 92 having various patterns during the groove process for the battery electrode 90.

[0070] The pattern part 40 may include a pattern body 41 and a pattern protrusion 42. The pattern body 41 may be assembled to the second peeler 30. When the pattern body 41 is assembled to the second peeler 30, the bottom surface of the second peeler 30 and the bottom surface of the pattern body 41 may be arranged in a colinear manner, and the pattern protrusion 42 may protrude downward from the bottom surface of the second peeler 30.

[0071] The pattern body 41 may include a body insertion portion 51 and a body base portion 52. The body insertion portion 51 may be slidably inserted into the second groove 31 formed in the second stripper 30. The body base portion 52 is formed at the body insertion portion 51 and is in close contact with the bottom surface of the second stripper 30, and the pattern protrusion 42 may be formed at the lower portion of the body base portion 52. The body base portion 52 may be connected to the lower portion of the body insertion portion 51.

[0072] The second groove 31 formed in the second stripper 30 may include a second groove penetration portion 311 and a second groove extension portion 312. The second groove penetration portion 311 may form a space that passes through the second stripper 30 in the horizontal direction. The second groove penetration portion 311 may have a rectangular shape with a cross-section that is long in the horizontal direction. The second groove extension portion 312 may extend from the second groove penetration portion 311 to the bottom surface of the second stripper 30 to be exposed to the outside. The second groove extension portion 312 may have a rectangular shape whose length is vertically long. The width a of the second groove penetration portion 311 may be formed to be greater than the width b of the second groove extension portion 312.

[0073] The second stripper 30 may further include a second mounting portion 32. The second mounting portion 32 may be formed at the lower portion of the second stripper 30 to provide a space for inserting the main body base portion 52. The second mounting portion 32 may have a shape of a groove or a hole formed in the lower portion of the second stripper 30 to communicate with the second groove extension portion 312. When the main body base portion 52 is inserted into the second mounting portion 32, the bottom surface of the main body base portion 52 and the bottom surface of the second stripper 30 may be arranged in a colinear manner. Therefore, the second stripper 30 may press the uncoated portion 92, and the pattern portion 40 assembled to the second stripper 30 may form a pattern on a portion of the uncoated portion 92. In addition, the second mounting portion 32 may be omitted in the second stripper 30, and the pattern portion 40 assembled to the second stripper 30 may form a pattern on the entire uncoated portion 92.

[0074] The main body insertion portion 51 may include an insertion penetration portion 511 and an insertion extension portion 512. The insertion penetration portion 511 may be inserted into the second groove penetration portion 311 to be supported on the second groove penetration portion 311. The insertion penetration portion 511 may have a shape corresponding to the second groove penetration portion 311, or may be formed to have a smaller cross-sectional area than the second groove penetration portion 311 to slide along the second groove penetration portion 311. The insertion extension portion 512 may extend from the insertion penetration portion 511 and may be inserted into the second groove extension portion 312. The lower end of the insertion extension portion 512 may be connected to the main body base portion 52.

[0075] Figure 7is a schematic diagram illustrating a state in which an insertion guide portion is added to a main body insertion portion and a pattern portion is in close contact with a second stripper according to one embodiment of the present disclosure. Figure 8 is a schematic diagram showing an insertion guide according to an embodiment of the present disclosure. Figure 7 and Figure 8 According to one embodiment of the present disclosure, the main body insertion portion 51 may further include an insertion guide portion 513 .

[0076] The insertion guide 513 may be installed on the insertion penetration portion 511, and may guide the main body base portion 52 to be in close contact with the lower portion of the second stripper 30. The upper surface of the main body base portion 52 and the lower surface of the second stripper 30 may be in close contact with each other through the insertion guide 513, thereby preventing the pattern main body 41 from moving due to a design error.

[0077] The insertion guide portion 513 may include a variable guide portion 61 and a guide roller portion 62. The variable guide portion 61 may include a pair of variable housings 611 vertically arranged to face each other and a variable elastic portion 612 connecting the variable housings 611 and whose length is variable by a spring force (elastic force). The variable guide portion 61 may be mounted on the bottom surface of the insertion penetration portion 511. The guide roller portion 62 may be rotatably mounted on the variable guide portion 61 and may move along the second groove penetration portion 311. The guide roller portion 62 may include a roller support 621 mounted on the lower portion of the variable guide portion 61 and a roller rotating portion 622 rotatably mounted on the roller support 621. The roller rotating portion 622 may be placed in the second groove penetration portion 311 and may rotate while contacting the second groove penetration portion 311. In addition, the guide roller portion 62 may be a ball bearing rotatably mounted on the bottom surface of the variable guide portion 61. Meanwhile, the guide roller portion 62 may be installed at an upper side of the insertion penetration portion 511 , and may make contact with an upper portion of the second groove through portion 311 .

[0078] Fig. 9 is a schematic diagram showing a state in which the main body stopper restricts the movement of the main body base portion according to one embodiment of the present disclosure. Fig. 9 According to an embodiment of the present disclosure, the pattern body 41 may further include a body stopper 53 .

[0079] The body stopper 53 may be mounted on the second stripper 30 and may limit the movement of the body base 52. The body stopper 53 may be coupled to a side end of at least one of the body insertion portion 51 and the body base 52 and may limit the movement of the pattern body 41 when the pattern body 41 reaches the operating position.

[0080] More specifically, the body stopper 53 may include a first stopper 531 , a second stopper 532 , and a third stopper 533 .

[0081] The first stopper 531 may be disposed on the upper side of the second stripper 30. The first stopper protrusion 535 may protrude from the lower portion of the first stopper 531. The first stopper protrusion 535 may be inserted into the locking groove 39 formed in the upper side of the second stripper 30 and may maintain a fixed state.

[0082] The second stopper 532 may extend downward from the first stopper 531 and may limit the movement of at least one of the body insertion portion 51 and the body base portion 52. The second stopper 532 may be directly coupled to the pattern body 41 or may be integrally formed with the pattern body 41. In addition, the second stopper 532 may be in close contact with the pattern body 41 to limit the movement of the pattern body 41.

[0083] The third stopper 533 may fix the first stopper 531 to the second peeler 30. The third stopper 533 may be a bolt passing through the first stopper 531 to be fixed to the second peeler 30. In addition, the third stopper 533 may be one of various fixing portions for fixing the first stopper 531 to the second peeler 30.

[0084] Fig.10 is a schematic diagram showing a pattern formed on an uncoated portion by a pattern portion according to an embodiment of the present disclosure. Fig.10 , the pattern formed on the uncoated portion 92 by the pattern portion 40 according to one embodiment of the present disclosure may have a concave-convex shape. The pattern may expand the contact area relative to the welding area to increase the joining force by welding. That is, when the concave-convex shape is enlarged in an area where it is difficult for the uncoated portions 92 to be in close contact, the contact area and adhesion between the uncoated portions 92 may be increased, thereby improving the welding quality. The concave-convex pattern may be designed differently in a pyramid shape, a hemispherical shape, a triangular shape, etc. In this case, for each area of ​​the uncoated portion 92, the size or shape of the concave-convex portion may be designed to be the same or different. At the same time, the pattern may be omitted in the non-welding area of ​​the uncoated portion 92. In the pattern protrusion 42, only a plurality of protrusions may be formed, or protrusions and recesses may be alternately arranged.

[0085] Fig.11 is a schematic diagram showing a support portion according to an embodiment of the present disclosure. Fig.11, the notching device 1 according to one embodiment of the present disclosure may further include a support portion 70. The support portion 70 may be formed on the mold 10, and may support the uncoated portion 92 so that a pattern is formed on the uncoated portion 92. The support portion 70 may be assembled to the mold 10 facing the pattern portion 40. Protrusions and recesses corresponding to the pattern protrusions 42 may be formed on the support portion 70 to support the uncoated portion 92 so that protrusions and recesses having a concave-convex shape are stably formed on the uncoated portion 92. Meanwhile, since the mounting structure of the support portion 70 corresponds to the mounting structure of the pattern portion 40, a detailed description thereof will be omitted.

[0086] Fig.12 is a schematic diagram showing a battery electrode manufactured by a groove opening device according to an embodiment of the present disclosure. Fig.12 , the battery electrode 90 can be manufactured using the above-described notching device 1 according to one embodiment of the present disclosure. That is, the active material can be applied to the unnotched battery electrode 90, and the battery electrode 90 can be supplied to the notching device 1 in a state of being divided into the mixture portion 91 and the uncoated portion 92.

[0087] When the unnotched battery electrode 90 is supplied between the mold 10 and the first stripper 20 of the notching device 1, the first stripper 20 and the second stripper 30 interlock with each other to move toward the mold 10 and press the mixture portion 91 and the uncoated portion 92, and unnecessary areas of the uncoated portion 92 are punched out and removed.

[0088] In this case, the pattern part 40 is assembled to the second stripper 30, and a groove process is performed so that the pattern part 40 forms a pattern in the welding area of ​​the non-coating part 92. The pattern forms concavo-convex parts and grooves in the non-coating part 92 to increase the contact area between the non-coating parts 92 overlapped with each other during welding of the non-coating parts 92, thereby improving the bonding force by welding.

[0089] The battery electrode 90 according to one embodiment of the present disclosure may include a mixture portion 91 , a non-coating portion 92 , and an area increasing portion 93 .

[0090] The mixture portion 91 may be pressed by the first peeler 20, and the active material may be applied on the mixture portion 91. The uncoated portion 92 extending from the mixture portion 91 may be pressed by the second peeler 30. The area increasing portion 93 formed on the uncoated portion 92 may be pressed by the pattern portion 40 to form a pattern.

[0091] A pattern may be formed on a portion of the non-coating portion 92 so that the area increasing portion 93 may increase the contact area. The area increasing portion 93 may have a concavo-convex shape and may be transformed into various shapes to increase the contact area.

[0092] If necessary, a plurality of battery electrodes 90 may be stacked. In this case, the mixture portions 91 may be stacked, and the uncoated portions 92 extending from the mixture portions 91 may be disposed to face each other. When the uncoated portions 92 are in contact with each other, the area increasing portions 93 disposed on the uncoated portions 92 may be bonded to each other by welding.

[0093] Fig.13 is a schematic diagram showing a battery module manufactured by a slotting device according to an embodiment of the present disclosure. Fig.13 The battery module 100 may be manufactured by including the battery electrode 90 manufactured by the above-mentioned notching device 1 according to one embodiment of the present disclosure.

[0094] That is, a plurality of battery electrodes 90 may be divided into positive electrodes and negative electrodes and stacked or wound, and a separator may be placed between the positive electrodes and the negative electrodes. In this case, the positive electrode and the negative electrode and the separator disposed between the positive electrode and the negative electrode may form an electrode assembly.

[0095] The battery electrode 90 may be embedded in the housing 120. The housing 120 may form the overall appearance of the battery module 100 and may be made of a conductive metal such as aluminum, aluminum alloy, or nickel-plated steel. In addition, the housing 120 may have an open upper side and may provide a space in which the battery electrode 90 is accommodated.

[0096] The cover plate 130 may cover the open area of ​​the case 120. The cover plate 130 may be coupled to an upper side of the case 120 and may cover the open area of ​​the case 120. The cover plate 130 contacting the case 120 may be made of a conductive material.

[0097] The terminal 140 may pass through the cap plate 130 to be assembled to the cap plate 130. The terminal 140 may be connected to the battery electrode 90. The terminal 140 may pass through the cap plate 130, the lower portion of the terminal 140 may be embedded in the housing 120 and in contact with the battery electrode 90, and the upper portion of the terminal 140 may protrude outward from the housing 120. The electrode tab 118 connected to the battery electrode 90 may contact the terminal 140.

[0098] Fig.14 It shows Fig.13 Schematic diagram of the bonding state between the uncoated parts in FIG. Fig.14, a plurality of battery electrodes 90 may be stacked or wound, and the uncoated portions 92 formed in each battery electrode 90 may be in surface contact with each other. In addition, the area increase portion 93 formed on the uncoated portion 92 may be welded in a state of surface contact with each other. The area increase portion 93 may have a concave-convex shape to increase the contact area for welding so that the joining force by welding may be increased. A plurality of uncoated portions 92 may be combined with each other and welded to the electrode tab 118 in the same manner. In this case, the electrode tab 118 may also have a shape corresponding to the area increase portion 93.

[0099] Fig.15 It shows Fig.13 Schematic diagram of the connection between the uncoated portion and the electrode terminal. Fig.15 , a plurality of battery electrodes 90 may be stacked or wound, and the uncoated portion 92 formed in each battery electrode 90 may be disposed to face the electrode tab 118. In this case, since the electrode tab 118 has a shape corresponding to the area-increased portion 93, the area-increased portion 93 disposed in each uncoated portion 92 may be welded in a state of surface contact with the electrode tab 118. The area-increased portion 93 may have a concave-convex shape to increase the contact area for welding, so that the bonding force by welding may be increased.

[0100] In the notching device 1 and the battery electrode 90 manufactured by the notching device 1 according to one embodiment of the present disclosure, the first stripper 20 and the mold 10 can press the mixture portion 91, and the second stripper 30 and the mold 10 can press the uncoated portion 92, so that the pattern portion 40 can form a pattern on the uncoated portion 92 during the notching process.

[0101] In the notching device 1 and the battery electrode 90 manufactured by the notching device 1 according to one embodiment of the present disclosure, the contact area and the bonding force between the non-coating portions 92 are increased by the patterns formed on the non-coating portions 92 , thereby improving the weldability thereof.

[0102] In the notching apparatus 1 and the battery electrode 90 manufactured by the notching apparatus 1 according to one embodiment of the present disclosure, the pattern part 40 is attached to or detached from the second peeler 30 to replace the pattern part 40 , thereby realizing patterns having various shapes.

[0103] Although the present invention has been described with reference to the embodiments and 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 slotting device, comprising: a mold configured to support an electrode; a first stripper moving toward the mold and pressing the mixture portion of the electrode; a second stripper moving toward the mold and pressing an uncoated portion of the electrode; as well as A pattern part moves toward the mold and forms a pattern on the uncoated part.

2. The slotting device according to claim 1, wherein: The second peeler is connected to the first peeler to interlock with the first peeler.

3. The slotting device according to claim 1, wherein: The pattern part is formed on the second peeler.

4. The slotting device according to claim 1, wherein: The pattern part may be attachable to or detachable from the second peeler.

5. The slotting device according to claim 4, wherein: The pattern portion comprises: a pattern body assembled to the second stripper; and A pattern protrusion is formed on a lower portion of the pattern body and is configured to form the pattern on the non-coating portion.

6. The slotting device according to claim 5, wherein: The pattern body comprises: a main body insertion portion slidably inserted into a second groove formed in the second stripper; and A body base part is formed at the body insertion part, is in close contact with a bottom surface of the second stripper, and has a lower portion on which the pattern protrusion is formed.

7. The slotting device according to claim 6, wherein: The second groove comprises: A second groove penetration portion passing through a lower portion of the second stripper; and a second groove extension portion extending from the second groove penetration portion to a bottom surface of the second stripper, and Wherein, the width of the second groove penetration portion is formed to be greater than the width of the second groove extension portion.

8. The slotting device according to claim 7, wherein: The main body insertion portion comprises: an insertion penetration portion inserted into the second groove penetration portion to be supported in the second groove penetration portion; and An insertion extension portion extends from the insertion penetration portion to be inserted into the second groove extension portion and is connected to the main body base portion.

9. The slotting device according to claim 8, wherein: The main body insertion portion further includes an insertion guide portion mounted on the insertion penetration portion and configured to guide the main body base portion to closely contact the lower portion of the second stripper.

10. The slotting device according to claim 9, wherein: The insertion guide comprises: a variable guide portion installed on a bottom surface of the insertion penetration portion and having a length that is variable by an elastic force; and A guide roller portion is rotatably mounted on the variable guide portion and is movable along the second groove penetration portion.

11. The slotting device according to claim 6, wherein: The pattern body further includes a body stopper mounted on the second peeler and configured to limit movement of the body base portion.

12. The slotting device according to claim 11, wherein: The main body stopper comprises: a first stopper disposed on an upper side of the second stripper; a second stopper extending downward from the first stopper and limiting movement of at least one of the main body insertion portion and the main body base portion; and A third stopper is configured to fix the first stopper to the second stripper.

13. The slotting device according to claim 1, wherein: The pattern has a concavo-convex shape. 14 . The notching device according to claim 1 , further comprising a support portion formed on the mold and configured to support the non-coating portion so that the pattern is formed on the non-coating portion.

15. A battery electrode manufactured by the groove forming device according to claim 1.

16. The battery electrode according to claim 15, wherein The battery electrode comprises: a mixture portion pressed by the first stripper and on which an active substance is applied; an uncoated portion extending from the mixture portion and pressed by the second peeler, and on which the active material is not applied; and An area increasing portion is formed on the non-coating portion and is pressed by the pattern portion to form a pattern.

17. The battery electrode according to claim 16, wherein: The area increasing portion is formed at a portion of the non-coating portion to increase a contact area.

18. The battery electrode according to claim 16, wherein The area increasing portion has a concavo-convex shape.

19. The battery electrode according to claim 16, wherein: A plurality of the mixing portions are stacked, and The area increasing portions provided on the non-coating portion extending from the mixture portion are bonded to each other by welding. 20 . A battery module comprising the battery electrode according to claim 15 .

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