Electrode plate processing equipment

Abstract

A machining apparatus 1 for electrode plates 10 comprises: a machining part 4 for forming an indent 20 at the boundary between a tab portion 12 and an unneeded portion 18 in an area R reserved for forming the tab portion 12 of an electrode plate 10; and a removal part 6 for detaching the unneeded portion 18 from the electrode plate 10 along the indent 20 by applying pressure to the unneeded portion 18.

Description

[Technical Field]

[0001] The present disclosure relates to an electrode plate processing device and processing method. [Background technology]

[0002] In recent years, with the spread of electric vehicles (EVs), hybrid vehicles (HVs), plug-in hybrid vehicles (PHVs), and other vehicles, shipments of in-vehicle secondary batteries have been increasing. In particular, shipments of lithium-ion secondary batteries have been increasing. In addition to in-vehicle use, secondary batteries are also becoming increasingly popular as power sources for portable devices such as laptop computers.

[0003] An example of a secondary battery includes a laminated electrode assembly in which multiple electrode plates are stacked, and a battery case that houses the laminated electrode assembly and an electrolyte. The electrode plate has a structure in which an electrode active material layer is stacked on the surface of a current collector plate made of metal foil or the like. The electrode plate also has a tab portion that protrudes from one side of the current collector plate. Regarding such electrode plates, for example, Patent Document 1 discloses an electrode manufacturing facility that transports an electrode material in which an electrode active material is applied to a strip-shaped current collector plate, and continuously forms electrode plates by punching the electrode material with a die roll cutter. [Prior art documents] [Patent documents]

[0004] [Patent Document 1] Japanese Patent Application Laid-Open No. 2017-196669 Summary of the Invention [Problem to be solved by the invention]

[0005] In conventional electrode manufacturing equipment, tab portions are formed by punching current collector plates with a die roll cutter. As a result of extensive research into methods for forming tab portions, the inventors have found that the conventional forming methods have room for improvement in terms of improving the quality of electrode plates.

[0006] The present disclosure has been made in light of these circumstances, and one of its objectives is to provide a technique for improving the quality of electrode plates. [Means for solving the problem]

[0007] One aspect of the present disclosure is an electrode plate processing device including a processing unit that forms a recess at a boundary between a tab portion and an unnecessary portion in a region of the electrode plate where the tab portion is to be formed, and a removal unit that applies force to the unnecessary portion to separate the unnecessary portion from the electrode plate along the recess.

[0008] Another aspect of the present disclosure is a method for processing an electrode plate, the method including forming a recess at a boundary between a tab portion and an unnecessary portion in a region of the electrode plate where the tab portion is to be formed, and applying a force to the unnecessary portion to separate the unnecessary portion from the electrode plate along the recess.

[0009] Any combination of the above components, and conversion of the expression of the present disclosure into a method, device, system, etc., are also valid aspects of the present disclosure. [Effects of the Invention]

[0010] According to the present disclosure, the quality of the electrode plate can be improved. [Brief explanation of the drawings]

[0011] [Figure 1] 1 is a perspective view of an electrode plate processing device according to an embodiment; [Figure 2] 2(A) to 2(C) are schematic diagrams of the gripping part. DETAILED DESCRIPTION OF THE INVENTION

[0012] The present disclosure will be described below with reference to preferred embodiments and drawings. The embodiments are illustrative and do not limit the present disclosure, and all features and combinations thereof described in the embodiments are not necessarily essential to the present disclosure. The same or equivalent components, parts, and processes shown in each drawing are designated by the same reference numerals, and redundant descriptions will be omitted where appropriate. The scale and shape of each part shown in each drawing are set for convenience to facilitate explanation and should not be interpreted as limiting unless otherwise specified. Furthermore, when terms such as "first" and "second" are used in this specification or claims, unless otherwise specified, these terms do not indicate any order or importance, but are intended to distinguish one configuration from another. Furthermore, some components that are not important for explaining the embodiments are omitted from each drawing.

[0013] 1 is a perspective view of a processing device 1 for an electrode plate 10 according to an embodiment. The processing device 1 for an electrode plate 10 (hereinafter, abbreviated as "processing device 1" where appropriate) includes a transport unit 2, a processing unit 4, and a removal unit 6.

[0014] The conveying unit 2 conveys a plurality of electrode plates 10. As an example, the conveying unit 2 conveys the plurality of electrode plates 10 in the state of a continuum 8 using conveying rolls 30 or the like. The continuum 8 is a strip-shaped body in which a plurality of electrode plates 10 are connected in the conveying direction A of the electrode plates 10. The electrode plates 10 are eventually separated from one another, but the position (timing) at which the electrode plates 10 are separated is not particularly limited. A stacked electrode body is obtained by alternately stacking the individual electrode plates 10 with separators sandwiched between them. The continuum 8 may also be used as a wound electrode body. The obtained stacked electrode body or wound electrode body can be used in rechargeable secondary batteries such as lithium-ion batteries, nickel-metal hydride batteries, and nickel-cadmium batteries, capacitors such as electric double layer capacitors, and the like.

[0015] Each electrode plate 10 has a structure in which an electrode active material layer is laminated on a current collector plate. In a typical lithium-ion secondary battery, the current collector plate is made of aluminum foil or the like for the positive electrode, and copper foil or the like for the negative electrode. The electrode active material layer can be formed by applying an electrode mixture to the surface of the current collector using a known coating device, followed by drying and rolling. The electrode mixture is obtained by kneading and uniformly dispersing materials such as the electrode active material, binder, and conductive material in a dispersion medium. In a typical lithium-ion secondary battery, the electrode active material is lithium cobalt oxide or lithium iron phosphate or the like for the positive electrode, and graphite or the like for the negative electrode.

[0016] After each electrode plate 10 has been processed by the processing unit 4 and the removal unit 6, the electrode plate 10 has a tab portion 12. The tab portion 12 protrudes from the current collector of each electrode plate 10 in the width direction B of the continuum 8. The width direction B is a direction perpendicular to the conveyance direction A. The tab portion 12 is also called a current collector tab, and serves to electrically connect the current collector to the external terminal of the battery.

[0017] Each electrode plate 10 has a coated portion 14 of the electrode active material and a non-coated portion 16 of the electrode active material. The coated portion 14 of the electrode active material is arranged at least in the center in the width direction B. The coated portion 14 corresponds to an electrode active material layer laminated on the current collector plate. The non-coated portion 16 of the electrode active material is arranged at an end portion in the width direction B. Each electrode plate 10 shown in FIG. 1 has a non-coated portion 16 only at one end portion in the width direction B, but non-coated portions 16 may be arranged at both ends. The non-coated portion 16 is an exposed portion of the current collector plate and corresponds to the region R where the tab portion 12 is to be formed.

[0018] The processing unit 4 forms a recess 20 at the boundary between the tab portion 12 and the unnecessary portion 18 in the planned formation region R of each electrode plate 10. The unnecessary portion 18 is the portion of the non-application portion 16 excluding the tab portion 12, and is cut off from the electrode plate 10 by the removal unit 6 to become waste material. The processing unit 4 of this embodiment is disposed on the transport path of the electrode plate 10, and forms a recess 20 in each electrode plate 10 that is sequentially transported. Note that the unnecessary portion 18 may also be in contact with the application unit 14. In this case, a recess 20 is also formed at the boundary between the unnecessary portion 18 and the application unit 14.

[0019] Furthermore, the processing unit 4 of this embodiment has a die roll 22 that rotates in synchronization with the transport of the electrode plate 10. The die roll 22 has a protrusion 24 on the circumferential surface of the roll that corresponds to the boundary between the tab portion 12 and the unnecessary portion 18, in other words, the outline of the unnecessary portion 18. As the die roll 22 rotates in synchronization with the transport of the electrode plate 10, the protrusion 24 is pressed against the intended formation region R of each electrode plate 10, forming a recess 20. The depth of the recess 20 is, for example, about half the thickness of the current collector plate. As an example, the thickness of the current collector plate is about 10 μm, and the depth of the recess 20 is about 5 μm. The recess 20 does not completely separate the unnecessary portion 18, and the unnecessary portion 18 remains connected to the electrode plate 10.

[0020] The processing device 1 may have a support section (not shown) for supporting the continuous body 8 at a position opposite the processing section 4 with the continuous body 8 sandwiched therebetween. The support section may be configured, for example, with a roll that rotates in synchronization with the transport of the continuous body 8. When forming the recesses 20 in the planned formation regions R of each electrode plate 10, the recesses 20 can be formed more reliably by sandwiching the electrode plate 10 between the protrusions 24 and the support section. Furthermore, the accuracy of the depth of the recesses 20 can be improved.

[0021] Each electrode plate 10 with a recess 20 formed by the processing unit 4 is transported by the transport unit 2 to the removal unit 6. The removal unit 6 separates the unnecessary portion 18 from the electrode plate 10 along the recess 20. The removal unit 6 in this embodiment is disposed on the transport path of the electrode plate 10 and performs a process of separating the unnecessary portion 18 from each electrode plate 10 that is sequentially transported. The removal unit 6 separates the unnecessary portion 18 from the electrode plate 10 by applying a physical force to the unnecessary portion 18. At this time, the recess 20 serves as the starting point for separating the electrode plate 10 from the unnecessary portion 18. In other words, when the removal unit 6 applies a force to the unnecessary portion 18, a tear is created in the recess 20, and this tear spreads throughout the entire recess 20, separating the unnecessary portion 18 from the electrode plate 10. This forms the tab portion 12.

[0022] The removal unit 6 of this embodiment includes a support unit 26 and multiple gripping units 28. The support unit 26 is a member that supports the multiple gripping units 28 and includes an annular unit 26a and multiple pedestals 26b. The annular unit 26a is arranged coaxially with the transport roll 30. As an example, the transport roll 30 is fixed and supports the rotation of the annular unit 26a. The annular unit 26a supports the continuum 8 on its circumferential surface and rotates in synchronization with the transport of the continuum 8. Therefore, the annular unit 26a of this embodiment constitutes a part of the transport unit 2. The multiple pedestals 26b are arranged at predetermined intervals around the annular unit 26a. Each pedestal 26b is flat and protrudes radially from the circumferential surface of the annular unit 26a. Each pedestal 26b is oriented so that its main surface faces the circumferential direction of the annular unit 26a.

[0023] A gripping portion 28 is installed on each pedestal 26b so as to be slidable in the width direction B. The gripping portion 28 can clamp the unnecessary portion 18 and can also move forward and backward relative to the electrode plate 10. The gripping portion 28 advances toward the electrode plate 10 to clamp the unnecessary portion 18, and then retracts from the electrode plate 10 in this state, thereby pulling the unnecessary portion 18 and separating it from the electrode plate 10.

[0024] 2(A) to 2(C) are schematic diagrams of the gripping portion 28. FIG. 2(A) shows the gripping portion 28 in the advanced position before gripping the unnecessary portion 18. FIG. 2(B) shows the gripping portion 28 in the advanced position after gripping the unnecessary portion 18. FIG. 2(C) shows the gripping portion 28 in the retracted position. Note that FIGS. 2(A) to 2(C) show the gripping portion 28 running parallel to the electrode plate 10. Also, the electrode plate 10 is not shown.

[0025] The gripping portion 28 is a first arm Part 32 and Part 2 arm The first support portion 34, the first support portion 36, the wedge portion 38, and the second support portion 40. arm Part 32 and Part 2 arm Each of the portions 34 is roughly rod-shaped and extends in the width direction B. arm Part 32 and Part 2 armThe portions 34 are arranged in the thickness direction C of the electrode plate 10 (a direction perpendicular to the conveyance direction A and the width direction B).

[0026] No. 1 arm The portion 32 has a first leading end portion 32a, a first intermediate portion 32b, and a first rear end portion 32c. In the width direction B, the first leading end portion 32a is disposed on the side closer to the electrode plate 10, the first rear end portion 32c is disposed on the side farther from the electrode plate 10, and the first intermediate portion 32b is disposed between the first leading end portion 32a and the first rear end portion 32c. arm The portion 34 has a second leading end portion 34a, a second intermediate portion 34b, and a second rear end portion 34c. In the width direction B, the second leading end portion 34a is disposed on the side closer to the electrode plate 10, the second rear end portion 34c is disposed on the side farther from the electrode plate 10, and the second intermediate portion 34b is disposed between the second leading end portion 34a and the second rear end portion 34c.

[0027] The first front end portion 32a and the second front end portion 34a face each other in the thickness direction C. In other words, they overlap each other when viewed from the thickness direction C. The first intermediate portion 32b has a first through hole 42 that penetrates it in the conveying direction A. The second intermediate portion 34b has a second through hole 44 that penetrates it in the conveying direction A. The first through hole 42 and the second through hole 44 overlap each other in the conveying direction A. A first roll 46 is rotatably provided at the first rear end portion 32c. A second roll 48 is rotatably provided at the second rear end portion 34c. The first roll 46 and the second roll 48 face each other in the thickness direction C, and their respective rotation axes extend in the conveying direction A.

[0028] No. 1 arm Part 32 and Part 2 arm The portion 34 is supported by a first support portion 36. The first support portion 36 has a support shaft 50 extending in the conveying direction A. The support shaft 50 is inserted into the first through-hole 42. arm The portion 32 is supported so as to be rotatable around the support shaft 50. The support shaft 50 is inserted through the second through-hole 44. arm The first portion 34 is supported so as to be rotatable around a support shaft 50. arm Part 32 and Part 2 armWhen the portion 34 is rotated in a direction in which the first tip portion 32a and the second tip portion 34a approach each other, the first rear end portion 32c and the second rear end portion 34c move away from each other. arm Part 32 and Part 2 arm When the portion 34 is rotated in a direction in which the first tip portion 32a and the second tip portion 34a move away from each other, the first rear end portion 32c and the second rear end portion 34c move closer to each other.

[0029] As an example, arm Part 32 and Part 2 arm The portion 34 is biased by a biasing member (not shown) such as a spring in a direction such that the first tip portion 32a and the second tip portion 34a move away from each other and the first rear end portion 32c and the second rear end portion 34c move closer to each other.

[0030] The wedge portion 38 is long in the width direction B and has a first arm Part 32 and Part 2 arm The wedge portion 38 is disposed on the side farther from the electrode plate 10 than the first portion 34. arm Part 32 and Part 2 arm The wedge portion 38 has a tapered portion 38a at its end facing the end portion 34, the size of which in the thickness direction C gradually decreases toward the tip. The size of a portion of the tapered portion 38a in the thickness direction C is adjusted so that, when that portion is sandwiched between the first roll 46 and the second roll 48, a gap larger than the thickness of the unwanted portion 18 is formed between the first tip portion 32a and the second tip portion 34a. Furthermore, the size of the main body portion 38b of the wedge portion 38 excluding the tapered portion 38a in the thickness direction C is adjusted so that, when that portion is sandwiched between the first roll 46 and the second roll 48, a gap smaller than the thickness of the unwanted portion 18 is formed between the first tip portion 32a and the second tip portion 34a, or no gap is formed at all.

[0031] The wedge portion 38 is supported by the second support portion 40. In a state where it is supported by the second support portion 40, the wedge portion 38 is disposed between the first roll 46 and the second roll 48. The second support portion 40 is disposed on a side farther from the electrode plate 10 than the first support portion 36. The first support portion 36 and the second support portion 40 are slidably fitted to a rail 52 provided on the base 26b. The rail 52 extends in the width direction B. The first support portion 36 and the second support portion 40 can slide along the rail 52 while maintaining a distance from each other by a known slide mechanism. This allows the first support portion 36 and the second support portion 40 to slide along the rail 52 while maintaining a distance from each other. arm Part 32 and Part 2 arm The first support portion 36 and the second support portion 40 can be moved forward and backward relative to the electrode plate 10 while maintaining a distance between them. Furthermore, the first support portion 36 and the second support portion 40 can be displaced relatively along the rails 52. This allows the wedge portion 38 to slide in the width direction B between the first roll 46 and the second roll 48.

[0032] As an example, the first support portion 36 and the second support portion 40 can be slid by a known cam mechanism. Specifically, a first cam follower 54 is provided on the first support portion 36. A second cam follower 56 is provided on the second support portion 40. A first cam 58 and a second cam 60 are provided on the circumferential surface of the transport roll 30. Therefore, the transport roll 30 of this embodiment constitutes a part of the removal unit 6. The first cam follower 54 slidably engages with the first cam 58, and the second cam follower 56 slidably engages with the second cam 60. The first cam 58 and the second cam 60 are each provided around the entire circumference of the transport roll 30. The distances between the first cam 58 and the second cam 60 and the continuum 8 are adjusted so that the first support portion 36 and the second support portion 40 move toward or away from the continuum 8 when displaced in the circumferential direction of the transport roll 30.

[0033] As the support portion 26 rotates relative to the transport roll 30, the first cam follower 54 moves along the first cam 58. As a result, the first support portion 36 slides in the width direction B. Furthermore, as the support portion 26 rotates relative to the transport roll 30, the second cam follower 56 moves along the second cam 60. As a result, the second support portion 40 slides in the width direction B. As the first support portion 36 and the second support portion 40 slide in synchronization, the first arm Part 32 and Part 2 arm The second support portion 34 and the wedge portion 38 move forward and backward relative to the electrode plate 10 while maintaining a distance from each other. In addition, only the second support portion 40 slides, or the sliding amount of the second support portion 40 is made larger than the sliding amount of the first support portion 36, so that the wedge portion 38 moves forward and backward relative to the first support portion 36. arm Part 32 and Part 2 arm The portion 34 is displaced relative to the portion 34 .

[0034] Each gripping unit 28 is sequentially sent to the cut-off position of the unwanted part 18 by the rotation of the support unit 26. After reaching the cut-off position, the gripping unit 28 moves away from the cut-off position. During this process, each gripping unit 28 operates as follows. First, as shown in FIG. 2(A), as the gripping unit 28 approaches the cut-off position of the unwanted part 18, the first support unit 36 ​​and the second support unit 40 slide toward the electrode plate 10. In this state, the tapered portion 38a is interposed between the first roll 46 and the second roll 48. Therefore, a gap is formed between the first tip 32a and the second tip 34a. When the gripping unit 28 reaches the cut-off position, it assumes an advanced position relative to the electrode plate 10, and the unwanted part 18 enters the gap between the first tip 32a and the second tip 34a.

[0035] Next, as shown in FIG. 2(B), while the first support portion 36 remains stationary, the second support portion 40 is further displaced toward the electrode plate 10. This causes the tapered portion 38a to enter between the first roll 46 and the second roll 48. At this time, the first roll 46 and the second roll 48 are pushed by the tapered portion 38a and displaced in directions away from each other against the biasing force of the biasing member. This causes the first rear end portion 32c and the second rear end portion 34c to displace in directions away from each other, and the first front end portion 32a and the second front end portion 34a to displace in directions toward each other. When the wedge portion 38 is displaced to a position where the main body portion 38b is sandwiched between the first roll 46 and the second roll 48, the unnecessary portion 18 is gripped by the first front end portion 32a and the second front end portion 34a.

[0036] 2(C), as the gripping portion 28 moves away from the position where the unnecessary portion 18 was cut off, the first support portion 36 and the second support portion 40 slide in a direction away from the electrode plate 10 while maintaining a distance from each other. This causes the gripping portion 28 to assume a retracted position relative to the electrode plate 10. At this time, the main body portion 38b is interposed between the first roll 46 and the second roll 48. Therefore, the unnecessary portion 18 remains gripped by the first tip portion 32a and the second tip portion 34a. As the gripping portion 28 moves away from the electrode plate 10 while still gripping the unnecessary portion 18, a tear is created in the recess 20, and the unnecessary portion 18 is cut off from the electrode plate 10.

[0037] The gripping portion 28 gripping the unwanted portion 18 reaches a disposal position for the unwanted portion 18 due to the rotation of the transport roll 30. As the gripping portion 28 approaches the disposal position, the second support portion 40 is displaced in a direction away from the first support portion 36. The second support portion 40 is displaced to a position where the tapered portion 38a is interposed between the first roll 46 and the second roll 48, or to a position where the wedge portion 38 is completely withdrawn. At this time, the first roll 46 and the second roll 48 are displaced in a direction toward each other due to the biasing force of the biasing member. As a result, the first rear end portion 32c and the second rear end portion 34c are displaced in a direction toward each other, and the first front end portion 32a and the second front end portion 34a are displaced in a direction away from each other. As a result, a gap is created between the first front end portion 32a and the second front end portion 34a, releasing the unwanted portion 18. The released unnecessary part 18 is removed from the gripping part 28 at the disposal position by gravity or by a suction mechanism or the like.

[0038] In this embodiment, the first wedge portion 38 arm Part 32 and Part 2 arm The first section 34 is opened and closed by another mechanism. arm Part 32 and Part 2 arm The removal unit 6 may open and close the holding portion 34. Furthermore, although the gripping portion 28 grips the unnecessary portion 18 and tears it from the electrode plate 10, the unnecessary portion 18 may be separated from the electrode plate 10 by another mechanism. For example, the removal unit 6 may have a protruding portion that can move forward and backward in the radial direction from the annular portion 26a, and the protruding portion may push the unnecessary portion 18 in the thickness direction C to separate the unnecessary portion 18 from the electrode plate 10. Furthermore, the removal unit 6 in this embodiment has a structure in which a plurality of gripping portions 28 are supported by the annular support portion 26, but this is not limited to this, and the plurality of gripping portions 28 may be arranged in a straight line, for example.

[0039] As described above, the processing device 1 for the electrode plate 10 in this embodiment includes a processing unit 4 that forms a recess 20 at the boundary between the tab portion 12 and the unnecessary portion 18 in the region R where the tab portion 12 of the electrode plate 10 is to be formed, and a removal unit 6 that applies force to the unnecessary portion 18 to cut off the unnecessary portion 18 from the electrode plate 10 along the recess 20.

[0040] One possible method for forming the tab portion 12 on the electrode plate 10 is to press-cut the electrode plate 10 with a die roll cutter. However, in this case, vertical burrs are likely to form on the edge of the electrode plate 10 due to friction between the electrode plate 10 and the cutting blade. Furthermore, the shearing blade is likely to chip or wear. Another possible method for forming the tab portion 12 on the electrode plate 10 is to perform laser processing on the region R to be formed. However, in this case, it is not easy to form the tab portion 12 accurately due to flapping of the electrode plate 10 during transportation. Furthermore, because spatter is generated when cutting the electrode plate 10 with a laser, a chamber or the like must be provided.

[0041] In contrast, in the present embodiment, a recess 20 is formed at the boundary between the tab portion 12 and the unnecessary portion 18, and a force is applied to the unnecessary portion 18, thereby separating the unnecessary portion 18 from the electrode plate 10 starting from the recess 20. This reduces friction between the electrode plate 10 and the blade compared to when the electrode plate 10 is cut by pushing it with a cutting blade. This reduces burrs on the edge of the electrode plate 10. It also reduces chipping and wear of the blade. The recess 20 is formed by pressing the protrusion 24 against the electrode plate 10. This allows the recess 20 to be formed by holding down the electrode plate 10, which tends to flap during transportation. Furthermore, flapping of the electrode plate 10 does not substantially affect the operation of tearing the unnecessary portion 18 starting from the recess 20. Therefore, compared to laser processing, the accuracy of forming the tab portion 12 can be improved more easily. As described above, the processing device 1 according to this embodiment can improve the quality of the electrode plate 10.

[0042] The processing device 1 of this embodiment also includes a transport unit 2 that transports a plurality of electrode plates 10. The processing unit 4 and the removal unit 6 are disposed on the transport path of the electrode plates 10, and form recesses 20 and cut off unnecessary portions 18 for each of the electrode plates 10 that are sequentially transported. This allows the throughput of the processing device 1 to be improved.

[0043] Furthermore, the processing unit 4 of this embodiment has a die roll 22 that has a protrusion 24 on its peripheral surface that corresponds to the boundary between the tab portion 12 and the unnecessary portion 18 and rotates in synchronization with the transport of the electrode plate 10. This makes it possible to form recesses 20 continuously on a plurality of electrode plates 10 with a simpler configuration.

[0044] Furthermore, the remover 6 of this embodiment has a gripping portion 28 that can move forward and backward relative to the electrode plate 10 and that clamps the unnecessary portion 18. This allows the unnecessary portion 18 to be torn from the electrode plate 10, starting from the recess 20.

[0045] The above describes the embodiments of the present disclosure in detail. The above-described embodiments merely illustrate specific examples of implementing the present disclosure. The content of the embodiments does not limit the technical scope of the present disclosure, and many design modifications, such as changing, adding, or deleting components, are possible within the scope of the concept of the present disclosure defined in the claims. A new embodiment with design modifications will combine the effects of the combined embodiments and modifications. In the above-described embodiments, the content in which such design modifications are possible is emphasized by using notations such as "in this embodiment" or "in this embodiment," but design modifications are also permitted even in content without such notation. Any combination of the above components is also valid as an aspect of the present disclosure. Hatching in cross sections in the drawings does not limit the material of the hatched object.

[0046] The embodiments may be specified by the following items. [Item 1] a processing portion (4) for forming a recess (20) at the boundary between the tab portion (12) and an unnecessary portion (18) in a region (R) where the tab portion (12) of the electrode plate (10) is to be formed; a removal unit (6) that applies force to the unnecessary portion (18) to separate the unnecessary portion (18) from the electrode plate (10) along the recess (20); A processing device (1) for an electrode plate (10). [Item 2] a conveying unit (2) for conveying a plurality of electrode plates (10); The processing unit (4) and the removing unit (6) are arranged on the conveying path of the electrode plates (10), and form recesses (20) and cut off unnecessary portions (18) from each of the electrode plates (10) that are conveyed sequentially. Item 1. A processing device (1) for an electrode plate (10) according to item 1. [Item 3] The processing unit (4) has a die roll (22) having a convex portion (24) on its circumferential surface corresponding to the boundary and rotating in synchronization with the conveyance of the electrode plate (10). Item 2. A processing device (1) for an electrode plate (10). [Item 4] The removal unit (6) is movable toward and away from the electrode plate (10) and has a gripping unit (28) that grips the unnecessary portion (18). 4. A processing device (1) for an electrode plate (10) according to any one of items 1 to 3. [Item 5] A recess (20) is formed at the boundary between the tab portion (12) and the unnecessary portion (18) in the region (R) where the tab portion (12) of the electrode plate (10) is to be formed; applying a force to the unnecessary portion (18) to separate the unnecessary portion (18) from the electrode plate (10) along the recess (20); A method for processing an electrode plate (10). [Industrial Applicability]

[0047] The present disclosure can be used in an electrode plate processing device and processing method. [Explanation of symbols]

[0048] 1 Processing device, 2 Transport section, 4 Processing section, 6 Removal section, 10 Electrode plate, 12 Tab section, 18 Unnecessary section, 20 Depression, 22 Die roll, 24 Convex section, 28 Holding section, R Planned formation area.

Claims

1. An electrode plate processing device, a processing portion that forms a recess at a boundary between the tab portion and an unnecessary portion in a region where the tab portion is to be formed of the electrode plate; a removal unit that applies a force to the unnecessary portion to separate the unnecessary portion from the electrode plate along the recess; a conveying unit that conveys a plurality of electrode plates, the processing unit and the removing unit are disposed on a conveying path of the electrode plates, and form the recesses and cut off the unnecessary portions of each of the electrode plates that are conveyed sequentially; the removal unit includes a gripping unit that is movable toward and away from the electrode plate and that clamps the unnecessary portion, and a support unit that supports the gripping unit, the support portion rotates in synchronization with the transport of the electrode plate, the processing device includes a cam mechanism that moves the gripping part toward and away from the electrode plate by rotating the support part, and switches between gripping and releasing the unnecessary part by the gripping part by rotating the support part. Electrode plate processing equipment.

2. the processing unit has a die roll that has a convex portion on its circumferential surface corresponding to the boundary and rotates in synchronization with the transport of the electrode plate. The electrode plate processing device according to claim 1 .

3. The conveying section has a fixed conveying roll, the support portion has an annular portion rotatably supported by the transport roll, and a base that protrudes from a peripheral surface of the annular portion and is installed so as to be slidable in a direction in which the gripping portion advances toward and retreats from the electrode plate, the cam mechanism includes a cam follower provided on the gripping portion, and a cam provided on a circumferential surface of the transport roll and slidably engaged with the cam follower, The support portion rotates relative to the transport roll, causing the cam follower to move along the cam, and the movement causes the gripping portion to advance and retreat relative to the electrode plate and switch between gripping and releasing the unnecessary portion.

3. The electrode plate processing device according to claim 1 or 2.

4. The removal unit has a plurality of the gripping units, The support portion has a plurality of the pedestals on which the gripping portions are installed and which are arranged at predetermined intervals in the circumferential direction of the annular portion. The electrode plate processing device according to claim 3.

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