Dry electrode composite slicer

Abstract

The utility model discloses a kind of dry-method electrode composite slicing machine, including roll-in film forming mechanism, powder supply mechanism, base material unwinding mechanism, slitting mechanism and material receiving mechanism;The roll-in film forming mechanism includes compression roller group, and the compression roller group includes the upper compression roller, middle compression roller and lower compression roller sequentially arranged, first calendering gap is formed between the upper compression roller and the middle compression roller, second calendering gap is formed between the middle compression roller and the lower compression roller;The powder supply mechanism is set at first calendering gap, and the powder supply mechanism includes powder box and powder feeding assembly;The base material unwinding mechanism is set at second calendering gap;The dry-method electrode composite slicing machine integrates compression roller, composite, slitting function, reduces process circulation, improves soft pole piece slitting precision and processing efficiency;Solve the problem that soft battery pole piece is deformed after compression roller, slitting precision is low, add base material to enhance pole piece rigidity.

Description

Technical Field

[0001] This utility model relates to the field of battery manufacturing equipment technology, specifically to a dry electrode composite slicing machine. Background Technology

[0002] Battery electrode sheets are core components of lithium-ion batteries, consisting of positive electrode aluminum foil + lithium / nickel / cobalt / manganese oxide and negative electrode copper foil + graphite. Their performance directly determines the battery's capacity, cycle life, and safety. In the battery electrode sheet manufacturing process, the electrode sheets undergo a rolling process to precisely control their thickness, followed by slitting into individual electrode sheets of specific sizes. Electrode slicing machines are common equipment in battery production and R&D; their main function is to cut electrode sheets of specific shapes and sizes. However, under the current technology system, the electrode calendering and slitting processes generally use two independent sets of equipment, and most existing calendering equipment adopts a double-roller structure. Utility Model Content

[0003] The purpose of this invention is to provide a dry electrode composite slicer in order to solve the above-mentioned problems.

[0004] This utility model achieves the above-mentioned objective through the following technical solution: a dry electrode composite slicing machine, comprising a main body, the main body comprising a roller pressing film forming mechanism, a powder feeding mechanism, a substrate unwinding mechanism, a slitting mechanism and a material receiving mechanism; The roll forming mechanism includes a roller group, which includes an upper roller, a middle roller and a lower roller arranged in sequence. A first calendering gap is formed between the upper roller and the middle roller, and a second calendering gap is formed between the middle roller and the lower roller. The powder supply mechanism is located at the first calendering gap, and the powder supply mechanism includes a powder box and a powder feeding component; The substrate unwinding mechanism is located at the second calendering gap, and the substrate unwinding mechanism includes a substrate roll and a tension adjusting guide roller; The slitting mechanism is located on the discharge side of the lower pressure roller; The receiving mechanism is located on the discharge side of the cutting mechanism.

[0005] Preferably, the roll forming mechanism includes a pressure roller drive assembly, which is driven and connected to the upper pressure roller, the middle pressure roller and the lower pressure roller respectively.

[0006] Preferably, the substrate unwinding mechanism includes an unwinding drive assembly, which is drivenly connected to the substrate unwinding mechanism.

[0007] Preferably, the slitting mechanism includes a cutter assembly and a cutter drive assembly.

[0008] Preferably, the receiving mechanism is a roll receiving mechanism, which includes a receiving roll and a receiving roll drive assembly.

[0009] Preferably, the receiving mechanism is a sheet receiving mechanism, which includes a sheet cutting assembly and a sheet collecting assembly. The sheet cutting assembly is located on the feeding side of the sheet collecting assembly, and a composite guide roller is provided between the sheet collecting assembly and the slitting mechanism.

[0010] Preferably, the pressure roller assembly is composed of no less than three pressure rollers.

[0011] The beneficial effects of this utility model are: This device integrates pressure roller, compounding, and slitting functions, reducing process flow and improving the slitting accuracy and processing efficiency of soft electrode sheets; it solves the problems of easy deformation and low slitting accuracy of soft battery electrode sheets after being slitting by pressure rollers, and adds a substrate to enhance the rigidity of the electrode sheets. Attached Figure Description

[0012] Figure 1 This is a schematic diagram of the overall structure of the dry electrode composite slicer in Example 1; Figure 2 This is a schematic diagram of the slitting mechanism in the dry electrode composite slicer in the embodiment; Figure 3 This is a schematic diagram of the overall structure of the dry electrode composite slicer in Example 2. Detailed Implementation

[0013] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model. Example 1

[0014] like Figure 1-2The following describes a dry electrode composite slicing machine, comprising a main structure including a roll forming mechanism, a powder supply mechanism 10, a substrate unwinding mechanism 4, a slitting mechanism, and a receiving mechanism. The powder supply mechanism 10 supplies calendered material. The substrate unwinding mechanism 4 provides a roll-shaped substrate, driven by an unwinding drive assembly. The roll-shaped substrate is one of aluminum foil, copper foil, or PET film. The roll forming mechanism includes a roller group comprising an upper roller 1, a middle roller 2, and a lower roller 3 arranged sequentially. The upper roller 1, middle roller 2, and lower roller 3 rotate synchronously. A first calendering gap is formed between the upper roller 1 and the middle roller 2, allowing initial compression of the calendered material. A second calendering gap is formed between the middle roller 2 and the lower roller 3, allowing the calendered material to contact the roll-shaped substrate at the second calendering gap. The intermediate pressure roller 2 and the lower pressure roller 3 are pressed together. The powder supply mechanism 10 is located at the first calendering gap. The powder supply mechanism 10 includes a powder box and a powder application component, which is a coating roller or a spray head. The substrate unwinding mechanism 4 is located at the second calendering gap. The substrate unwinding mechanism 4 includes a substrate roll and a tension adjusting guide roller 5. The output end of the tension adjusting guide roller 5 corresponds to the feed port of the second calendering gap. It is used to simultaneously feed the substrate and the electrode sheet to be calendered into the calendering gap, so that the substrate and the electrode sheet are pressed together to form a composite electrode sheet. The thickness and density of the electrode sheet can be adjusted by adjusting the pressure roller drive component to control the second pressing gap. The tension can be adjusted and maintained during the unwinding process by the tension adjusting guide roller 5. The slitting mechanism 6 is located on the discharge side of the lower pressure roller 3. The collecting mechanism is located on the discharge side of the slitting mechanism 6 and is used to collect the finished electrode sheets after slitting.

[0015] It should be noted that the roll forming mechanism includes a pressure roller drive assembly, which is connected to the upper pressure roller 1, the middle pressure roller 2 and the lower pressure roller 3 respectively, and drives the upper pressure roller 1, the middle pressure roller 2 and the lower pressure roller 3 to rotate synchronously.

[0016] It should be noted that the substrate unwinding mechanism 4 includes an unwinding drive assembly, which is drivenly connected to the substrate unwinding mechanism 4 and drives the unwinding roller to unwind and feed the substrate.

[0017] It should be noted that the slitting mechanism 6 includes a cutter assembly and a cutter drive assembly. According to the positioning signal given by the operating system control terminal, the cutter drive assembly drives the cutter assembly to slit the composite electrode sheet into the size predetermined by the operating system control terminal, and then cut it into rectangular electrode sheets by the cutter assembly.

[0018] It should be noted that the receiving mechanism is a sheet receiving mechanism, which includes a sheet cutting assembly 8 and a sheet collecting assembly 9. The sheet cutting assembly 8 is located on the feeding side of the sheet collecting assembly 9. A composite guide roller 7 is provided between the sheet collecting assembly 9 and the slitting mechanism 6. The output electrode sheets enter the slitting mechanism 6 for slitting. The slitting electrode sheets can be further sliced ​​by the composite guide roller 7. The rectangular electrode sheets after slitting enter the sheet collecting assembly 9 for collection.

[0019] It should be noted that the pressure roller group is assembled from no less than three pressure rollers, and the number of pressure rollers can be adjusted according to the thickness of the electrode sheet to meet the processing requirements of electrode sheets of different specifications. Example 2

[0020] like Figure 2-3 The following describes a dry electrode composite slicing machine, comprising a main structure including a roll forming mechanism, a powder supply mechanism 10, a substrate unwinding mechanism 4, a slitting mechanism, and a receiving mechanism. The powder supply mechanism 10 supplies calendered material. The substrate unwinding mechanism 4 provides a roll-shaped substrate, driven by an unwinding drive assembly. The roll-shaped substrate is one of aluminum foil, copper foil, or PET film. The roll forming mechanism includes a roller group comprising an upper roller 1, a middle roller 2, and a lower roller 3 arranged sequentially. The upper roller 1, middle roller 2, and lower roller 3 rotate synchronously. A first calendering gap is formed between the upper roller 1 and the middle roller 2, allowing initial compression of the calendered material. A second calendering gap is formed between the middle roller 2 and the lower roller 3, allowing the calendered material to contact the roll-shaped substrate at the second calendering gap. The intermediate pressure roller 2 and the lower pressure roller 3 are pressed together. The powder supply mechanism 10 is located at the first calendering gap. The powder supply mechanism 10 includes a powder box and a powder application component, which is a coating roller or a spray head. The substrate unwinding mechanism 4 is located at the second calendering gap. The substrate unwinding mechanism 4 includes a substrate roll and a tension adjusting guide roller 5. The output end of the tension adjusting guide roller 5 corresponds to the feed port of the second calendering gap. It is used to simultaneously feed the substrate and the electrode sheet to be calendered into the calendering gap, so that the substrate and the electrode sheet are pressed together to form a composite electrode sheet. The thickness and density of the electrode sheet can be adjusted by adjusting the pressure roller drive component to control the second pressing gap. The tension can be adjusted and maintained during the unwinding process by the tension adjusting guide roller 5. The slitting mechanism 6 is located on the discharge side of the lower pressure roller 3. The collecting mechanism is located on the discharge side of the slitting mechanism 6 and is used to collect the finished electrode sheets after slitting.

[0021] It should be noted that the roll forming mechanism includes a pressure roller drive assembly, which is connected to the upper pressure roller 1, the middle pressure roller 2 and the lower pressure roller 3 respectively, and drives the upper pressure roller 1, the middle pressure roller 2 and the lower pressure roller 3 to rotate synchronously.

[0022] It should be noted that the substrate unwinding mechanism 4 includes an unwinding drive assembly, which is drivenly connected to the substrate unwinding mechanism 4 and drives the unwinding roller to unwind and feed the substrate.

[0023] It should be noted that the slitting mechanism 6 includes a cutter assembly and a cutter drive assembly. According to the positioning signal given by the operating system control terminal, the cutter drive assembly drives the cutter assembly to slit the composite electrode sheet into the size predetermined by the operating system control terminal.

[0024] It should be noted that the taking-up mechanism is a roll taking-up mechanism, which includes a taking-up roll 13 and a taking-up roll drive assembly. The output electrode sheet enters the slitting mechanism 6 for slitting, and the taking-up roll drive assembly drives the taking-up roll 13 to take up the slitting electrode sheet.

[0025] It should be noted that the pressure roller group is assembled from no less than three pressure rollers, and the number of pressure rollers can be adjusted according to the thickness of the electrode sheet to meet the processing requirements of electrode sheets of different specifications.

[0026] Working principle: The material to be calendered is placed in the first calendering gap, and the calendered material is initially compressed by the upper pressure roller 1 and the middle pressure roller 2. The rolled substrate is placed on the substrate unwinding mechanism 4, and the tension is adjusted by the tension regulating guide roller 5 to maintain stable tension during the unwinding process. The substrate and the calendered material come into contact in the second calendering gap, and are pressed together by the middle pressure roller 2 and the lower pressure roller 3, so that the substrate and the electrode sheet are pressed together to form a composite electrode sheet. The thickness and density of the electrode sheet can be adjusted by adjusting the second pressing gap through the pressure roller drive assembly. The output composite electrode sheet enters the slitting mechanism 6 for slitting. According to the processing requirements, a roll take-up mechanism or a roll take-up mechanism is set at the next station of the slitting mechanism 6.

[0027] It will be apparent to those skilled in the art that this invention is not limited to the details of the exemplary embodiments described above, and that it can be implemented in other specific forms without departing from the spirit or essential characteristics of this invention. Therefore, the embodiments should be considered illustrative and non-limiting in all respects, and the scope of this invention is defined by the appended claims rather than the foregoing description. Thus, it is intended that all variations falling within the meaning and scope of equivalents of the claims be included within this invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

[0028] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A dry electrode composite slicer, characterized in that, The structure includes a main body, which includes a roll forming mechanism, a powder supply mechanism (10), a substrate unwinding mechanism (4), a slitting mechanism, and a receiving mechanism; The roll forming mechanism includes a roller group, which includes an upper roller (1), a middle roller (2) and a lower roller (3) arranged in sequence. A first calendering gap is formed between the upper roller (1) and the middle roller (2), and a second calendering gap is formed between the middle roller (2) and the lower roller (3). The powder supply mechanism (10) is located at the first calendering gap, and the powder supply mechanism (10) includes a powder box and a powder feeding assembly; The substrate unwinding mechanism (4) is located at the second calendering gap. The substrate unwinding mechanism (4) includes a substrate roll and a tension adjusting guide roller (5). The slitting mechanism (6) is located on the discharge side of the lower pressure roller (3); The receiving mechanism is located on the discharge side of the cutting mechanism (6).

2. The dry electrode composite slicer according to claim 1, characterized in that: The roll forming mechanism includes a pressure roller drive assembly, which is driven and connected to the upper pressure roller (1), the middle pressure roller (2) and the lower pressure roller (3) respectively.

3. The dry electrode composite slicer according to claim 1, characterized in that: The substrate unwinding mechanism (4) includes an unwinding drive assembly, which is drivenly connected to the substrate unwinding mechanism (4).

4. A dry electrode composite slicer according to claim 1, characterized in that: The slitting mechanism (6) includes a cutter assembly and a cutter drive assembly.

5. A dry electrode composite slicer according to claim 1, characterized in that: The receiving mechanism is a roll receiving mechanism, which includes a receiving roll (13) and a receiving roll drive assembly.

6. A dry electrode composite slicer according to claim 1, characterized in that: The receiving mechanism is a sheet receiving mechanism, which includes a sheet cutting assembly (8) and a sheet collecting assembly (9). The sheet cutting assembly (8) is located on the feeding side of the sheet collecting assembly (9), and a composite guide roller (7) is provided between the sheet collecting assembly (9) and the slitting mechanism (6).

7. A dry electrode composite slicer according to claim 1, characterized in that: The pressure roller assembly consists of no fewer than three pressure rollers.

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