Pole piece cutting mechanism and battery pole piece rolling device

Abstract

The utility model provides a pole piece cutting mechanism and a battery pole piece rolling device, the pole piece cutting mechanism comprises a fixing assembly and two cutting assemblies, the two cutting assemblies are installed on the fixing assembly, the cutting assemblies are movably connected with the fixing assembly, and the cutting direction of the cutting assemblies is parallel to the pole piece conveying direction. According to the pole piece cutting mechanism, a cutting assembly is installed on a conveyed pole piece, when the pole piece is conveyed, the two ends of the pole piece are cut through the cutting assembly, foil materials which are not coated at the two ends are cut, the cutting assembly moves on a fixing assembly, and the foil materials are cut by adjusting the position of the cutting assembly. The coating roller can be closer to a boundary between a coated part and a non-coated part, so that the subsequent rolled pole piece keeps the same thickness, and the upwarp of the pole piece without rolling is avoided. The battery pole piece rolling device comprises the pole piece cutting mechanism.

Description

Technical Field

[0001] The present application relates to the field of battery production technology, and in particular to a pole piece cutting mechanism and a battery pole piece rolling device. Background Art

[0002] The battery electrode coating line is a critical step in the lithium battery production process, primarily involving evenly coating a stirred slurry onto metal foil and drying it to form the positive and negative electrodes. During the coating process, the slurry cannot fully coat both sides of the battery electrode, resulting in inconsistent thickness between the electrode's center coating and the foil on both sides.

[0003] In the existing rolling process of the electrode, the blank foil on both sides generates stress due to inconsistent thickness, and the edge part is S-shaped. After rolling, the entire electrode appears irregularly warped, which ultimately affects the normal operation of the subsequent slitting process. Utility Model Content

[0004] The technical problem to be solved by this application is that during the existing rolling process of the electrode, the blank foil on both sides generates stress due to inconsistent thickness, the edge part is S-shaped, and the entire electrode is irregularly warped after rolling, which ultimately affects the normal operation of the subsequent slitting process.

[0005] In order to solve the above technical problems or at least partially solve the above technical problems, the present application provides a pole sheet cutting mechanism and a battery pole sheet rolling device.

[0006] In a first aspect, the utility model discloses a pole piece cutting mechanism, which includes a transmission roller, a fixed assembly and two cutting assemblies, wherein the two cutting assemblies are mounted on the fixed assembly, the cutting assemblies are movably connected to the fixed assembly, and the cutting direction of the cutting assemblies is parallel to the pole piece conveying direction;

[0007] The cutting assembly includes a knife seat, a main shaft, a cutter, a connecting block, a quick clamp and a linkage rod, the cutter is connected to the main shaft, the main shaft is arranged on the central axis of the cutter, the main shaft passes through the knife seat, the cutter is circular, the cutter and the pole piece are arranged vertically relative to each other, the transmission roller contacts the cutter, the linkage rod connects the quick clamp and the connecting block respectively, and the connecting block is connected to the knife seat;

[0008] By installing a cutting assembly on the conveyed pole piece, the pole piece passes between the transmission roller and the cutting mechanism during conveyance, and the two ends of the pole piece are cut by the cutting assembly.

[0009] Preferably, the fixing assembly includes a fixing plate and a mounting frame, the fixing plate is connected to the mounting frame, and the direction of the fixing plate is perpendicular to the direction of transmission of the pole piece.

[0010] Preferably, the fixed plate is provided with a movable slot;

[0011] The cutting assembly is provided with a sliding portion, the sliding portion and the knife seat are provided on two opposite surfaces, and the sliding portion is matched with the movable groove.

[0012] Preferably, the connection block is provided with a contact piece, and the contact piece is connected to the connection block.

[0013] Preferably, the cutting assembly includes a fixing member, a sliding member and a guide rail, the guide rail is connected to the fixing member, the sliding member is slidably connected to the guide rail, and the sliding member is connected to the connecting block.

[0014] Preferably, the cutting assembly includes a mounting plate and a limiting block, the limiting block and the mounting plate are respectively mounted on two ends of the fixing member, and the quick clamp is arranged on the mounting plate.

[0015] Preferably, the connecting block includes a fine-tuning screw, which passes through the connecting block and is connected to the tool holder.

[0016] Preferably, the main shaft is arranged perpendicular to the linkage rod, and the main shaft adjusts the cutter to move along the direction of the moving groove.

[0017] In a second aspect, the utility model discloses a battery pole piece rolling device, which includes the above-mentioned pole piece cutting mechanism.

[0018] Preferably, it includes a rolling mechanism, an unwinding mechanism, and a winding mechanism. The unwinding mechanism loads the uncut pole pieces, the pole piece cutting mechanism cuts the uncoated foil on both sides of the pole pieces, the rolling mechanism rolls the cut pole pieces, and the winding mechanism winds up the pole pieces after rolling.

[0019] The above technical solution provided by this application has the following advantages compared with the existing technology:

[0020] The present application provides a pole piece cutting mechanism and a battery pole piece rolling device, wherein, on the pole piece cutting mechanism, a cutting assembly is installed on the conveyed pole piece. When the pole piece is conveyed, both ends are cut by the cutting assembly, so that the foil material at both ends that has not been coated is cut. The cutting assembly moves on the fixed assembly. By adjusting the position of the cutting assembly, it can be closer to the dividing line between the coated part and the uncoated part, so that the pole piece that is subsequently rolled maintains the same thickness, avoiding the pole piece from warping due to not rolling.

[0021] For the battery electrode rolling device, the cutting mechanism can cut the input electrode at both ends to keep the electrode being rolled at the same thickness, avoid stress, and prevent the entire electrode from irregularly warping after rolling, ensuring the normal operation of subsequent production processes such as the slitting process. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] The accompanying drawings are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the present invention, and together with the description, serve to explain the principles of the present invention.

[0023] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, for ordinary technicians in this field, other drawings can be obtained based on these drawings without any creative work.

[0024] Figure 1 A schematic structural diagram of a pole piece cutting mechanism provided in this application;

[0025] Figure 2 Schematic diagram of the structure of the electrode;

[0026] Figure 3 A schematic structural diagram of a cutting assembly of a pole piece cutting mechanism provided in this application;

[0027] Figure 4 This is a schematic structural diagram of a battery pole sheet rolling device provided in this application.

[0028] Description of reference numerals:

[0029] 100. Battery pole sheet rolling device; 3. Rolling mechanism; 4. Unwinding mechanism; 5. Rewinding mechanism;

[0030] 1. Pole cutting mechanism; 2. Pole;

[0031] 11. Transmission roller;

[0032] 12. Fixing assembly; 121. Fixing plate; 1211. Moving slot; 122. Mounting frame;

[0033] 13. Cutting components;

[0034] 131. Cutter; 1311. Cutter holder; 1312. Spindle;

[0035] 132. Connecting block; 1321. Fine-tuning screw; 1322. Contact piece;

[0036] 133. Quick clamp; 1331. Linkage rod;

[0037] 134, fixing member; 1341, sliding portion; 1342, guide rail; 1343, sliding member;

[0038] 135, mounting plate;

[0039] 136. Limit block. DETAILED DESCRIPTION

[0040] To make the objectives, technical solutions, and advantages of this application more clear, the technical solutions of this application will be clearly and completely described below in conjunction with the accompanying drawings. Obviously, the embodiments described are part of the embodiments of this application, not all of them. Based on the embodiments of this application, all other embodiments obtained by ordinary technicians in this field without making any creative efforts are within the scope of protection of this application.

[0041] First, see Figure 1-3 The utility model discloses a pole piece cutting mechanism 1, which can cut the pole piece 2, cut the foil materials on both sides of the pole piece 2 that have not been coated, and retain the pole piece 2 that has been coated.

[0042] The electrode cutting mechanism 1 includes a transmission roller 11, a fixed component 12 and two cutting components 13. The cutting component 13 is used to cut the electrode 2. The two cutting components 13 are installed on the fixed component 12. The cutting component 13 is movably connected to the fixed component 12. The cutting direction of the cutting component 13 is parallel to the transmission direction of the electrode 2. The transmission roller 11 is in contact with the cutting mechanism, and the electrode 2 is transmitted between the transmission roller 11 and the cutting mechanism.

[0043] Specifically, on the electrode cutting mechanism 1, by installing a cutting component 13 on the conveyed electrode 2, the electrode 2 passes between the transmission roller 11 and the cutting mechanism during transportation, and the two ends are cut by the cutting component 13, so that the foil without coating treatment at both ends is cut. The cutting component 13 moves on the fixed component 12. By adjusting the position of the cutting component 13, it can be closer to the dividing line between the coated part and the uncoated part, so that the subsequent rolled electrode 2 can maintain the same thickness, avoiding the electrode 2 from warping when it is not rolled.

[0044] The fixing assembly 12 includes a fixing plate 121 and a mounting frame 122 . The fixing plate 121 is connected to the mounting frame 122 . The fixing plate 121 is located in a direction perpendicular to the transmission direction of the pole piece 2 .

[0045] The fixed plate 121 is provided with a movable groove 1211 , and the cutting assembly 13 is provided with a sliding portion 1341 at a position corresponding to the movable groove 1211 . The sliding portion 1341 and the knife holder 1311 are provided on two opposite surfaces, and the sliding portion 1341 cooperates with the movable groove 1211 .

[0046] Specifically, the cutting component 13 is installed in the movable groove 1211 of the fixed plate 121 through the sliding part 1341. Since the sliding part 1341 can move on the movable groove 1211, the cutting component 13 can move along the direction of the movable groove 1211. By moving the cutting component 13, the cutting position of the cutting component 13 can be adjusted to be closer to the boundary between the coated part and the uncoated part on the electrode 2.

[0047] The cutting assembly 13 includes a knife holder 1311 , a spindle 1312 , a cutter 131 , a connecting block 132 , a quick clamp 133 , a linkage rod 1331 , a fixing member 134 , a sliding member 1343 , a guide rail 1342 , a mounting plate 135 , and a limiting block 136 .

[0048] The cutter 131 is connected to the main shaft 1312, and the main shaft 1312 is arranged on the central axis of the cutter 131. The main shaft 1312 is arranged through the cutter seat 1311. The cutter 131 is circular. The cutter 131 and the pole piece 2 are arranged vertically relative to each other. The linkage rod 1331 respectively connects the quick clamp 133 and the connecting block 132, the connecting block 132 is connected to the cutter seat 1311, the guide rail 1342 is connected to the fixing member 134, the sliding member 1343 is slidably connected to the guide rail 1342, and the sliding member 1343 is connected to the connecting block 132. The limit block 136 and the mounting plate 135 are respectively installed at both ends of the fixing member 134, and the quick clamp 133 is arranged on the mounting plate 135.

[0049] The main shaft 1312 is arranged perpendicular to the linkage rod 1331. The main shaft 1312 can adjust the cutter 131 to move along the direction of the movable groove 1211. The main shaft 1312 is arranged through the knife seat 1311. The cutter 131 is installed at one end of the main shaft 1312. By adjusting the other end of the main shaft 1312, the cutting position of the cutter 131 can be adjusted.

[0050] The fixing member 134 is mounted on the fixing plate 121. The fixing member 134 is provided with a fastening hole for installing the fastener. The fixing plate 121 is provided with a mounting groove corresponding to the fastener, so that the cutting assembly 13 can be installed on the fixing plate 121. Limit blocks 136 and a mounting plate 135 are provided at both ends of the fixing member 134. The sliding portion 1341 is mounted on the fixing member 134. The sliding portion 1341 and the guide rail 1342 are respectively provided on two opposite surfaces of the fixing member 134. The fixing member 134 is mounted on the fixing plate 121 via the sliding portion 1341. The connecting block 132 and the limit block 136 are provided at the same end. The linkage rod 1331 is provided on the mounting plate 135 and the connecting block 132. The quick clamp 133 is provided on one side of the mounting plate 135. The linkage rod 1331 passes through the mounting plate 135 and connects to the quick clamp 133. The quick clamp 133 can drive the linkage rod 1331 to move, pull the connecting block 132 to move, thereby driving the knife holder 1311 and the cutter 131 away from or close to the transmission roller 11, adjusting the distance between the cutter 131 and the transmission roller 11, and improving the cutting effect of the cutter 131. The quick clamp 133 is provided to make it more convenient for the operator to adjust the cutter 131. The sliding member 1343 is installed on the connecting block 132. The sliding member 1343 can move up and down along the guide rail 1342. When the quick clamp 133 pulls the linkage rod 1331 to move, the sliding member 1343 drives the knife holder 1311 to move up and down along the guide rail 1342, so that the knife holder 1311 and the connecting block 132 move with the sliding member 1343.

[0051] Optionally, the connection block 132 is provided with a contact member 1322, and the contact member 1322 is connected to the connection block 132. The contact member 1322 abuts against the limit block 136. The contact member 1322 is provided with an elastic member. When the connection block 132 and the limit block 136 are close to each other, the limit block 136 compresses the elastic member of the contact member 1322, thereby preventing the quick clamp 133 from applying a force that causes the cutter 131 to drop too much, thereby preventing damage to the transmission roller 11 below.

[0052] Optionally, the connecting block 132 includes a fine-tuning screw 1321, which passes through the connecting block 132 and is connected to the knife seat 1311. By adjusting the fine-tuning screw 1321, the distance between the connecting block 132 and the knife seat 1311 can be adjusted, thereby fine-tuning the distance between the cutter 131 and the transmission roller 11, and the cutter 131 can adapt to cutting pole pieces 2 of different thicknesses.

[0053] Second, see Figure 4The utility model discloses a battery electrode sheet rolling device 100, which includes the above-mentioned electrode sheet cutting mechanism 1, rolling mechanism 3, unwinding mechanism 4, and winding mechanism 5. The unwinding mechanism 4 loads the uncut electrode sheet 2, the electrode sheet cutting mechanism 1 cuts the uncoated foil on both sides of the electrode sheet 2, the rolling mechanism 3 rolls the cut electrode sheet 2, and the winding mechanism 5 rolls the electrode sheet 2 after rolling.

[0054] It can be understood that for the battery electrode rolling device 100, the cutting mechanism can cut the two ends of the input electrode 2, so that the electrode 2 undergoing rolling treatment maintains the same thickness, avoids stress, prevents the entire electrode 2 from irregularly warping after rolling, and makes the edge of the winding mechanism 5 smooth after winding, ensuring the normal operation of subsequent production processes such as the slitting process.

[0055] In the above embodiments, the description of each embodiment has its own focus. For parts that are not described in detail in a certain embodiment, reference can be made to the relevant descriptions of other embodiments.

[0056] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise" and the like to indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0057] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of the technical features being referred to. Thus, a feature specified as "first" or "second" may explicitly or implicitly include one or more of such features. In the description of this utility model, "plurality" means two or more, unless otherwise specifically defined.

[0058] In this utility model, unless otherwise specified or limited, the terms "installed," "connected," "connect," "fixed," etc. should be understood in a broad sense. For example, they can refer to connection, detachable connection, or integration; mechanical connection or electrical connection; direct connection or indirect connection through an intermediate medium; internal communication between two components or interaction between two components. For those skilled in the art, the specific meanings of the above terms in this utility model can be understood according to specific circumstances.

[0059] In the present invention, unless otherwise expressly specified or limited, a first feature being "above" or "below" a second feature may include the first and second features being in direct contact, or may include the first and second features being in contact not directly but through another feature between them. Moreover, a first feature being "above," "above," and "above" a second feature may include the first feature being directly above or obliquely above the second feature, or may simply mean that the first feature is higher in level than the second feature. A first feature being "below," "below," and "below" a second feature may include the first feature being directly below or obliquely below the second feature, or may simply mean that the first feature is lower in level than the second feature.

[0060] In the description of this specification, the reference terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" mean that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic expressions of the above terms should not be understood as necessarily referring to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art can combine and combine the different embodiments or examples described in this specification.

[0061] Obviously, those skilled in the art may make various modifications and variations to the present invention without departing from the spirit and scope of the present invention. Thus, as long as these modifications and variations of the present invention fall within the scope of the claims of the present invention and their equivalents, the present invention is intended to include such modifications and variations.

[0062] The above description is a specific embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any person skilled in the art can easily conceive of various equivalent modifications or substitutions within the technical scope disclosed in the present invention, and such modifications or substitutions should be included in the scope of protection of the present invention. Therefore, the scope of protection of the present invention should be based on the scope of protection of the claims.

Claims

1. A pole piece cutting mechanism, characterized in that: It includes a transmission roller, a fixed component and two cutting components, wherein the two cutting components are mounted on the fixed component, the cutting components are movably connected to the fixed component, and the cutting direction of the cutting components is parallel to the direction of pole piece transmission; The cutting assembly includes a knife seat, a main shaft, a cutter, a connecting block, a quick clamp and a linkage rod, the cutter is connected to the main shaft, the main shaft is arranged on the central axis of the cutter, the main shaft passes through the knife seat, the cutter is circular, the cutter and the pole piece are arranged vertically relative to each other, the transmission roller contacts the cutter, the linkage rod connects the quick clamp and the connecting block respectively, and the connecting block is connected to the knife seat; By installing a cutting assembly on the conveyed pole piece, the pole piece passes between the transmission roller and the cutting mechanism during conveyance, and the two ends of the pole piece are cut by the cutting assembly.

2. The electrode cutting mechanism according to claim 1, characterized in that: The fixing assembly includes a fixing plate and a mounting frame, the fixing plate is connected to the mounting frame, and the direction of the fixing plate is perpendicular to the direction of transmission of the pole piece.

3. The electrode cutting mechanism according to claim 2, characterized in that: The fixed plate is provided with a movable groove; The cutting assembly is provided with a sliding portion, the sliding portion and the knife seat are provided on two opposite surfaces, and the sliding portion is matched with the movable groove.

4. The electrode cutting mechanism according to claim 1, characterized in that: The connection block is provided with a contact piece, and the contact piece is connected to the connection block.

5. The electrode cutting mechanism according to claim 1, characterized in that: The cutting assembly includes a fixing member, a sliding member and a guide rail, wherein the guide rail is connected to the fixing member, the sliding member is slidably connected to the guide rail, and the sliding member is connected to the connecting block.

6. The electrode cutting mechanism according to claim 5, characterized in that: The cutting assembly includes a mounting plate and a limiting block. The limiting block and the mounting plate are respectively mounted on two ends of the fixing member. The quick clamp is arranged on the mounting plate.

7. The electrode cutting mechanism according to claim 1, characterized in that: The connecting block includes a fine-tuning screw, which passes through the connecting block and is connected to the tool holder.

8. The electrode cutting mechanism according to claim 1, characterized in that: The main shaft and the linkage rod are vertically arranged, and the main shaft adjusts the cutter to move along the direction of the moving groove.

9. A battery pole sheet rolling device, characterized in that: It comprises the pole piece cutting mechanism described in any one of claims 1 to 8.

10. The battery pole sheet rolling device according to claim 9, characterized in that: It includes a rolling mechanism, an unwinding mechanism, and a winding mechanism. The unwinding mechanism loads the uncut pole pieces, the pole piece cutting mechanism cuts the uncoated foil on both sides of the pole piece, the rolling mechanism rolls the cut pole pieces, and the winding mechanism winds up the pole pieces after rolling.

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