Battery pole piece and battery pole piece manufacturing equipment

Abstract

The utility model discloses a battery pole piece and battery pole piece manufacturing equipment, and relates to battery manufacturing equipment. One end of the tab part is fixed on the main body part, and the other end of the tab part extends towards the direction far away from the main body part; the reinforcing layer is arranged on the side surface of the tab part and is close to the main body part, and / or the reinforcing layer is arranged on the side surface of the main body part and is close to the tab part. According to the technical scheme provided by the utility model, the possibility that the battery pole piece is damaged is reduced.

Description

Technical Field

[0001] The utility model relates to battery manufacturing equipment, in particular to a battery pole piece and battery pole piece manufacturing equipment. Background Art

[0002] During the battery production process, laser cutting is generally required to cut the electrode materials to meet specific process requirements.

[0003] The specific shape structure produced after the electrode material is laser cut is called the pole ear. Since the electrode material is generally aluminum foil or copper foil, which is soft in texture, the material strip after cutting to form the pole ear will have varying degrees of wrinkles and deformation during the transportation process in the subsequent steps. This makes it easy for the pole ear to have problems such as crescents, folding, and tearing. In severe cases, it may even cause the entire battery electrode to tear. Utility Model Content

[0004] The main purpose of the utility model is to provide a battery pole piece and a battery pole piece manufacturing device, aiming to reduce the possibility of damage to the battery pole piece.

[0005] In order to achieve the above-mentioned purpose, the battery pole piece proposed by the utility model comprises:

[0006] Main body;

[0007] a pole ear portion, one end of which is fixed to the main body portion, and the other end of which extends in a direction away from the main body portion; and

[0008] A reinforcement layer is provided on the side of the pole ear portion and is arranged close to the main body portion, and / or the reinforcement layer is provided on the side of the main body portion and is arranged close to the pole ear portion.

[0009] In one embodiment, the two opposite sides of the pole ear portion are provided with the reinforcement layer, and / or the two opposite sides of the main body portion are provided with the reinforcement layer; and / or,

[0010] The main body has a first end and a second end opposite to each other in the width direction, the first end and the second end are both provided with the pole ear portion, and the first end and the second end are both provided with the reinforcement layer; and / or,

[0011] The reinforcement layer is a polyurethane glue layer.

[0012] The utility model also provides a battery pole piece manufacturing device, comprising:

[0013] A cutting device, used for cutting a target area of ​​a pole piece raw material so that the pole piece raw material forms a battery pole piece having a main body portion and a pole ear portion; and

[0014] A coating device is provided on one side of the cutting device, and is used to coat a reinforcing layer on the target area of ​​the electrode sheet material; or, is used to coat the reinforcing layer on the side of the ear portion and / or the side of the main body portion of the battery electrode sheet.

[0015] In one embodiment, the coating device comprises:

[0016] Bracket;

[0017] A first spray head, slidably disposed on the bracket, for spraying the reinforcement layer; and

[0018] The first driving assembly is arranged on the bracket and is drivingly connected to the first spraying head so that the first spraying head can slide linearly along the width direction of the pole piece material.

[0019] In one embodiment, the coating device further comprises:

[0020] A second spray head is slidably mounted on the bracket and spaced apart from the first spray head; and

[0021] The second driving component is arranged on the bracket and is drivingly connected to the second spray head. The first driving component and the second driving component are driven to make the first spray head and the second spray head approach to each other or move away from each other.

[0022] In one embodiment, the battery electrode manufacturing equipment includes two coating devices arranged in sequence, each of which is used to coat the reinforcing layer on one side of the electrode raw material, and / or each of which is used to coat the reinforcing layer on one side of the battery electrode.

[0023] In one embodiment, the battery pole piece manufacturing equipment further includes an air-drying device, and at least one of the coating devices is provided with the air-drying device correspondingly, and the air-drying device is used to air-dry the reinforcing layer coated by the coating device.

[0024] In one embodiment, the air drying device comprises:

[0025] a heating assembly for heating the air; and

[0026] The ventilation component is arranged on one side of the heating component and is used to allow the air heated by the heating component to flow to the reinforcement layer.

[0027] In one embodiment, the battery electrode manufacturing equipment further includes a roller conveying device, which is connected to the coating device and the cutting device and is used to convey the electrode raw material and / or the battery electrode.

[0028] In one embodiment, the roller conveying device includes a correcting mechanism, which is used to adjust the conveying direction of the electrode raw material. The coating device is provided with the correcting mechanism on the front side along the conveying direction of the electrode raw material, and / or the cutting device is provided with the correcting mechanism on the front side along the conveying direction of the electrode raw material.

[0029] The battery pole piece in the technical solution of the utility model comprises a main body, a pole ear part and a reinforcing layer. The pole piece raw material is cut to remove waste to form a main body and a pole ear part. The pole ear part is arranged on the end face of the main body in the width direction. The side face of the pole ear part and the side face of the main body part are planes perpendicular to the end face of the main body part. The reinforcing layer can be arranged on the side face of the pole ear part and close to the main body part to strengthen the strength of the pole ear part. In the processing process after cutting the pole ear part, the possibility of problems such as crescent, folding and tearing of the pole ear part is reduced, and the possibility of damage to the entire battery pole piece is reduced; the reinforcing layer can also be arranged on the side face of the main body part and close to the pole ear part to strengthen the edge of the main body part. In the processing process after cutting the pole ear part, the possibility of problems such as wrinkles, deformation and tearing of the main body part is reduced, and the possibility of damage to the entire battery pole piece is reduced; of course, the reinforcing layer can also be arranged on the pole ear part and the main body part at the same time to further enhance the strength of the battery pole piece and reduce the possibility of damage to the battery pole piece. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on the structures shown in these drawings without paying creative work.

[0031] Figure 1 A schematic structural diagram of an embodiment of a battery pole piece provided by the utility model;

[0032] Figure 2 A schematic structural diagram of another embodiment of a battery electrode provided by the utility model;

[0033] Figure 3 A structural schematic diagram of another embodiment of a battery electrode provided by the utility model;

[0034] Figure 4 A schematic structural diagram of an embodiment of a battery pole piece manufacturing device provided by the utility model;

[0035] Figure 5 This is a structural schematic diagram of another embodiment of the battery pole piece manufacturing equipment provided by the utility model.

[0036] Description of Figure Numbers:

[0037] 110, battery pole piece; 111, main body; 112, pole ear; 113, reinforcement layer; 120, waste material;

[0038] 200. Battery electrode manufacturing equipment; 210. Cutting device; 220. Coating device; 221. Bracket; 222. First spray head; 230. Roller conveying device; 231. Correction mechanism; 240. Air drying device.

[0039] The realization of the purpose, functional features and advantages of the utility model will be further explained in conjunction with embodiments and with reference to the accompanying drawings. DETAILED DESCRIPTION

[0040] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0041] It should be noted that if the embodiments of the present invention involve directional indications (such as up, down, left, right, front, back...), the directional indications are only used to explain the relative position relationship, movement status, etc. between the components in a certain specific posture. If the specific posture changes, the directional indications will also change accordingly.

[0042] In the present invention, unless otherwise clearly defined and limited, the terms "connection", "fixation", etc. should be understood in a broad sense. For example, "fixation" can be a fixed connection, a detachable connection, or an integral connection; "connection" can be a mechanical connection or an electrical connection, a direct connection, or an indirect connection through an intermediate medium, or the internal connection of two elements or the interaction relationship between two elements. Unless otherwise clearly defined, ordinary technicians in this field can understand the specific meanings of the above terms in the present invention according to specific circumstances.

[0043] In addition, if there are descriptions such as "first" and "second" in the embodiments of the utility model, the descriptions such as "first" and "second" are only used for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In addition, the meaning of "and / or" appearing in the full text includes three parallel schemes. Taking "A and / or B" as an example, it includes scheme A, or scheme B, or a scheme that satisfies both A and B. In addition, the technical solutions between the various embodiments can be combined with each other, but it must be based on the ability of ordinary technicians in this field to implement. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such a combination of technical solutions does not exist and is not within the scope of protection required by the utility model.

[0044] The utility model provides a battery pole piece.

[0045] See also Figures 1 to 3 , Figure 1 This is a schematic structural diagram of an embodiment of a battery electrode provided by the utility model. Figure 2 This is a schematic structural diagram of another embodiment of the battery pole piece provided by the utility model. Figure 3 This is a structural schematic diagram of another embodiment of the battery electrode provided by the utility model.

[0046] In one embodiment of the present invention, the battery electrode 110 includes:

[0047] Main body 111;

[0048] a pole ear portion 112 , one end of which is fixed to the main body portion 111 , and the other end of which extends in a direction away from the main body portion 111 ; and

[0049] The reinforcement layer 113 is disposed on the side of the pole ear portion 112 and close to the main body portion 111 , and / or the reinforcement layer 113 is disposed on the side of the main body portion 111 and close to the pole ear portion 112 .

[0050] The battery pole piece 110 in the technical solution of the utility model comprises a main body 111, a pole ear 112 and a reinforcing layer 113. The pole piece raw material is cut to remove the waste 120 to form the main body 111 and the pole ear 112. The pole ear 112 is arranged on the end face of the main body 111 in the width direction. The side face of the pole ear 112 and the side face of the main body 111 are perpendicular to the end face of the main body 111. The reinforcing layer 113 can be arranged on the side face of the pole ear 112 and close to the main body 111, so as to strengthen the strength of the pole ear 112. In the processing process after cutting the pole ear 112, the occurrence of crescent, folding and tearing of the pole ear 112 is reduced. The possibility of problems such as cracking is reduced, and the possibility of damage to the entire battery electrode sheet 110 is reduced; the reinforcement layer 113 can also be arranged on the side of the main body 111 and close to the pole ear 112, so as to strengthen the edge of the main body 111. During the processing after cutting the pole ear 112, the possibility of wrinkles, deformation, tearing and other problems in the main body 111 is reduced, and the possibility of damage to the entire battery electrode sheet 110 is reduced; of course, the reinforcement layer 113 can also be arranged on the pole ear 112 and the main body 111 at the same time to further enhance the strength of the battery electrode sheet 110 and reduce the possibility of damage to the battery electrode sheet 110.

[0051] The reinforcing layer 113 can be implemented by coating glue and then solidifying it, or by attaching insulating tape.

[0052] In one embodiment, two opposite sides of the pole ear portion 112 are provided with a reinforcement layer 113, and / or two opposite sides of the main body portion 111 are provided with a reinforcement layer 113; and / or,

[0053] The main body 111 has a first end and a second end opposite to each other in the width direction. Both the first end and the second end are provided with a lug portion 112 , and both the first end and the second end are provided with a reinforcement layer 113 .

[0054] In the embodiment of the utility model, the pole ear portion 112 has two side surfaces, and a reinforcing layer 113 can be provided on both side surfaces of the pole ear portion 112 to further strengthen the strength of the pole ear portion 112, thereby further reducing the possibility of damage to the pole ear portion 112. The main body portion 111 has two side surfaces, and a reinforcing layer 113 can be provided on both side surfaces of the main body portion 111 to further strengthen the strength of the edge of the main body portion 111, thereby further reducing the possibility of damage to the main body portion 111.

[0055] In an embodiment of the utility model, pole ear portions 112 are provided at both ends of the main body portion 111 in the width direction, a reinforcing layer 113 is provided at the connection between the first end and the pole ear portion 112, and a reinforcing layer 113 is also provided at the connection between the second end and the pole ear portion 112, thereby strengthening the strength of the two ends of the main body portion 111 and further reducing the possibility of damage to the main body portion 111 and the pole ear portion 112.

[0056] In one embodiment, the reinforcement layer 113 is a polyurethane glue layer.

[0057] In the embodiment of the present utility model, the reinforcing layer 113 is a polyurethane glue layer, which is formed by coating the polyurethane glue on the surface of the electrode material. The process is simple, the cost is low, and it can be cured under room temperature and heating conditions.

[0058] The utility model also provides a battery pole piece manufacturing device 200, comprising:

[0059] A cutting device 210 is used to cut a target area of ​​a pole piece material so that the pole piece material forms a battery pole piece 110 having a main body portion 111 and a pole ear portion 112; and

[0060] The coating device 220 is disposed on one side of the cutting device 210 and is used to coat the reinforcing layer 113 on the target area of ​​the electrode material; or, to coat the reinforcing layer 113 on the side of the ear portion 112 and / or the side of the main body 111 of the battery electrode 110.

[0061] The specific structure of the battery electrode 110 refers to the above embodiment, wherein Figure 4The cutting device 210 is used to cut the target area of ​​the electrode material, and remove the waste material 120 from the electrode material, so as to form a battery electrode 110 having a main body 111 and an ear portion 112. The cutting device 210 can process the main body 111 and the ear portion 112 by a tool die cutting method, or by a laser cutting method. The coating device 220 is used to coat the reinforcing layer 113. Along the conveying direction of the pole piece material, the coating device 220 can be arranged on the front side of the cutting device 210. The coating device 220 first coats the reinforcing layer 113 on the target area of ​​the pole piece material to be cut, and then the cutting device 210 cuts the pole piece material to shape the pole ear portion 112 and the main body portion 111; the coating device 220 can also be arranged on the rear side of the cutting device 210. The cutting device 210 first cuts the target area of ​​the pole piece material to shape the pole ear portion 112 and the main body portion 111, and then the coating device 220 coats the reinforcing layer 113 at the corresponding position of the main body portion 111 and / or the pole ear portion 112, thereby realizing the production of the pole ear portion 112 and the reinforcing layer 113. Among them, the coating device 220 is arranged on the front side of the cutting device 210 along the conveying direction of the electrode raw material, that is, the reinforcing layer 113 is coated first and then cut. It can also reduce the edge burrs of the main body 111 and the electrode ear part 112 caused by cutting, and reduce the possibility of glue being coated on the coating device 220 itself, thereby ensuring the cleanliness of the production environment.

[0062] In one embodiment, the coating device 220 includes:

[0063] Bracket 221;

[0064] A first spray head 222 is slidably mounted on the bracket 221 and is used for spraying the reinforcement layer 113; and

[0065] The first driving assembly is disposed on the bracket 221 and is drivingly connected to the first spray head 222 so that the first spray head 222 can slide linearly along the width direction of the electrode material.

[0066] Reference Figure 4In the embodiment of the utility model, the coating device 220 includes a bracket 221, a first spray head 222 and a first driving assembly. The first spray head 222 can slide relative to the bracket 221 along the width direction of the pole piece raw material. On the one hand, the first spray head 222 can be aligned with the area where the reinforcing layer 113 needs to be sprayed by adjusting the position. On the other hand, the position can be adjusted according to the pole piece raw materials of different widths, so as to meet the production needs of battery pole pieces 110 of different widths. The first driving assembly can be in the form of a linear motor or a cylinder, etc., to drive the first spray head 222 to slide along the bracket 221, reduce the manual operation when adjusting the position of the spray head, improve the accuracy of the position of the first spray head 222, thereby improving the position accuracy of the coated reinforcing layer 113, and ensuring the strength reinforcing effect of the reinforcing layer 113 on the main body 111 and the pole ear 112.

[0067] In one embodiment, the coating device 220 further includes:

[0068] A second spray head is slidably disposed on the bracket 221 and spaced apart from the first spray head 222; and

[0069] The second driving assembly is disposed on the bracket 221 and is drivingly connected to the second spray head. The first driving assembly and the second driving assembly are driven to make the first spray head 222 and the second spray head approach to or move away from each other.

[0070] In an embodiment of the utility model, the coating device 220 also includes a second spray head and a second drive assembly. The second spray head and the first spray head 222 adopt the same structural form. The first spray head 222 and the second spray head are provided with two spray heads, which can simultaneously coat the reinforcing layer 113 on both ends of the width of the electrode raw material, thereby improving production efficiency. The second spray head can also slide relative to the bracket 221 along the width direction of the electrode raw material. Both spray heads can slide, which makes it easier to meet the production needs of battery electrodes 110 of different widths. The second drive assembly can be in the form of a linear motor or a cylinder, etc., to drive the second spray head to slide along the bracket 221. Each spray head is driven to slide by a drive assembly, so that the first spray head 222 and the second spray head change faster when adjusting the position, and the time taken to adjust to the position is shorter.

[0071] In one embodiment, the battery electrode manufacturing equipment 200 includes two coating devices 220 arranged in sequence, each coating device 220 is used to coat a reinforcing layer 113 on one side of the electrode material, and / or each coating device 220 is used to coat a reinforcing layer 113 on one side of the battery electrode 110.

[0072] Reference Figure 4In an embodiment of the present utility model, the battery pole piece manufacturing equipment 200 includes two coating devices 220 . By setting up the two coating devices 220 , the reinforcing layer 113 is coated on both sides of the battery pole piece 110 . Along the conveying direction of the electrode material, both coating devices 220 can be arranged on the front side of the cutting device 210, and each coating device 220 coats a reinforcing layer 113 on one side of the electrode material. For example, first, a coating device 220 coats the reinforcing layer 113 on the front side of the electrode material, and then another coating device 220 coats the reinforcing layer 113 on the back side of the electrode material, and then the cutting device 210 cuts the electrode material; both coating devices 220 can also be arranged on the rear side of the cutting device 210, and each coating device 220 coats a reinforcing layer 113 on one side of the battery electrode 110, for example, first, the main body 111 and the pole ear 112 are cut and formed by the cutting device 210, and then a coating device 220 coats the reinforcing layer 113 on the front side of the battery electrode 110, and then another coating device 220 coats the reinforcing layer 113 on the back side of the battery electrode 110.

[0073] In one embodiment, the battery electrode manufacturing equipment 200 further includes an air-drying device 240 , and at least one coating device 220 is correspondingly provided with an air-drying device 240 , and the air-drying device 240 is used to air-dry the reinforcing layer 113 coated by the coating device 220 .

[0074] Reference Figure 5 In an embodiment of the utility model, the coating device 220 also includes an air-drying device 240. The air-drying device 240 can blow the reinforcing layer 113 coated by the coating device 220 by blowing normal temperature air or hot air, thereby accelerating the solidification speed of the reinforcing layer 113, shortening the time required for the electrode raw material and / or the battery electrode 110 to enter the next process, and improving production efficiency.

[0075] In one embodiment, the air drying device 240 includes:

[0076] a heating assembly for heating the air; and

[0077] The ventilation component is disposed on one side of the heating component and is used to allow the air heated by the heating component to flow to the reinforcement layer 113 .

[0078] In an embodiment of the utility model, the air-drying device 240 includes a heating component and a blowing component. The heating component can heat the air by electromagnetic induction or resistance heating, and the ventilation component can use a fan to blow air or create negative pressure to make the hot air flow to the reinforcing layer 113, thereby accelerating the solidification speed of the reinforcing layer 113.

[0079] In one embodiment, the battery electrode manufacturing equipment 200 further includes a roller conveying device 230 , which is connected to the coating device 220 and the cutting device 210 and is used to convey electrode raw materials and / or battery electrodes 110 .

[0080] Reference Figure 4 In an embodiment of the utility model, the electrode material before cutting and the battery electrode 110 after cutting are both conveyed by a roller conveying device 230. The roller conveying device 230 can ensure the continuous conveyance of the strip electrode material and the battery electrode 110 by staggered arrangement of multiple rollers, so as to continuously perform the coating reinforcement layer 113 operation and the electrode ear cutting operation, thereby improving the manufacturing efficiency of the battery electrode 110.

[0081] In one embodiment, the roller conveying device 230 includes a correcting mechanism 231, which is used to adjust the conveying direction of the electrode raw material. The coating device 220 is provided with a correcting mechanism 231 on the front side along the conveying direction of the electrode raw material, and / or the cutting device 210 is provided with a correcting mechanism 231 on the front side along the conveying direction of the electrode raw material.

[0082] Reference Figure 4 In the embodiment of the utility model, the roller conveying device 230 includes a deflection correction mechanism 231. Along the conveying direction of the pole piece raw material, the deflection correction mechanism 231 can be arranged before the coating device 220 to reduce the possibility of the pole piece raw material entering the coating device 220 to deviate and improve the coating position accuracy of the reinforcing layer 113; the deflection correction mechanism 231 can also be arranged before the cutting device 210 to reduce the possibility of the pole piece raw material entering the cutting device 210 to deviate and improve the cutting accuracy of the main body 111 and the pole ear 112 by the cutting device 210. The deflection correction device includes two movable deflection correction rollers, which adjust their own positions, axial directions, tensioning degrees, etc. through their own activities, thereby adjusting the pole piece raw material wound on the deflection correction rollers.

[0083] The above description is only an exemplary embodiment of the present invention, and does not limit the patent scope of the present invention. All equivalent structural changes made by using the contents of the present invention specification and drawings under the technical concept of the present invention, or directly / indirectly applied in other related technical fields are included in the patent protection scope of the present invention.

Claims

1. A battery pole piece, characterized in that: include: Main body; A pole ear portion, one end of which is fixed to the main body portion, and the other end of which extends in a direction away from the main body portion; as well as A reinforcement layer is provided on the side of the pole ear portion and is arranged close to the main body portion, and / or the reinforcement layer is provided on the side of the main body portion and is arranged close to the pole ear portion.

2. The battery pole piece according to claim 1, characterized in that: The two opposite sides of the pole ear portion are both provided with the reinforcement layer, and / or, the two opposite sides of the main body portion are both provided with the reinforcement layer; and / or, The main body has a first end and a second end opposite to each other in the width direction, the first end and the second end are both provided with the pole ear portion, and the first end and the second end are both provided with the reinforcement layer; and / or, The reinforcement layer is a polyurethane glue layer.

3. A battery pole piece manufacturing device, characterized in that: include: A cutting device, used for cutting a target area of ​​a pole piece raw material so that the pole piece raw material forms a battery pole piece having a main body portion and a pole ear portion; as well as A coating device is provided on one side of the cutting device, and is used to coat a reinforcing layer on the target area of ​​the electrode sheet material; or, is used to coat the reinforcing layer on the side of the ear portion and / or the side of the main body portion of the battery electrode sheet.

4. The battery pole piece manufacturing equipment according to claim 3, characterized in that: The coating device comprises: Bracket; A first spray head, slidably disposed on the bracket, for spraying the reinforcement layer; and The first driving assembly is arranged on the bracket and is drivingly connected to the first spraying head so that the first spraying head can slide linearly along the width direction of the pole piece material.

5. The battery pole piece manufacturing equipment according to claim 4, characterized in that: The coating device also includes: A second spray head is slidably mounted on the bracket and spaced apart from the first spray head; and The second driving component is arranged on the bracket and is drivingly connected to the second spray head. The first driving component and the second driving component are driven to make the first spray head and the second spray head approach to each other or move away from each other.

6. The battery pole piece manufacturing equipment according to claim 3, characterized in that: The battery pole piece manufacturing equipment includes two coating devices arranged in sequence, each of which is used to coat the reinforcing layer on one side of the pole piece raw material, and / or each of which is used to coat the reinforcing layer on one side of the battery pole piece.

7. The battery pole piece manufacturing equipment according to claim 6, characterized in that: The battery pole piece manufacturing equipment also includes an air-drying device, and at least one of the coating devices is provided with the air-drying device correspondingly, and the air-drying device is used to air-dry the reinforcing layer coated by the coating device.

8. The battery pole piece manufacturing equipment according to claim 7, characterized in that: The air drying device comprises: a heating assembly for heating the air; and The ventilation component is arranged on one side of the heating component and is used to allow the air heated by the heating component to flow to the reinforcement layer.

9. The battery pole piece manufacturing equipment according to claim 3, characterized in that: The battery pole piece manufacturing equipment also includes a roller conveying device, which is connected to the coating device and the cutting device and is used to convey the pole piece raw material and / or the battery pole piece.

10. The battery pole piece manufacturing equipment according to claim 9, characterized in that: The roller conveying device includes a correcting mechanism, which is used to adjust the conveying direction of the electrode material. The coating device is provided with the correcting mechanism on the front side along the conveying direction of the electrode material, and / or the cutting device is provided with the correcting mechanism on the front side along the conveying direction of the electrode material.

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