A slitting device for battery electrode sheets

Abstract

The utility model discloses a battery pole piece's slitting device belongs to slitting machine technical field. Including: unwinding mechanism, slitting mechanism and winding mechanism, unwinding mechanism includes first unwinding shaft, second unwinding shaft, connects the platform and a plurality of unwinding over rollers, first unwinding shaft, second unwinding shaft all are equipped with the material roll of detachable, and first unwinding shaft is driven independently with second unwinding shaft, and the battery pole piece on two material rolls is connected to the platform, and the battery pole piece on material roll alternately passes through unwinding over roller and enters slitting mechanism, and the battery pole piece that slitting mechanism slits enters winding mechanism, the utility model discloses can change roll under not delaying the device operation condition, greatly reduces the time cost, and then improves production efficiency.

Description

Technical Field

[0001] This utility model belongs to the field of slitting machine technology, specifically relating to a slitting device for battery electrode sheets. Background Technology

[0002] A typical slitting machine for electrode sheet cutting includes an unwinding mechanism, a roller feeder, a slitting mechanism, and a winding mechanism. Positive and negative electrode sheet strips are drawn from the unwinding mechanism, slit by the slitting mechanism, and converged by the roller feeder to the winding mechanism for winding, thus obtaining qualified electrode sheets. Traditional slitting machines mostly use a single unwinding pneumatic shaft for unwinding, and two rewinding pneumatic shafts in the winding mechanism for winding after slitting. After the unwinding shaft has finished unwinding the material roll, the machine needs to be stopped to change the roll and reconnect the strip before restarting production. This process requires downtime and consumes a significant amount of time, leading to reduced production efficiency. Therefore, there is an urgent need for a battery electrode sheet slitting device. Utility Model Content

[0003] The purpose of this invention is to overcome the shortcomings of the prior art and provide a battery electrode cutting device that can change rolls without delaying the operation of the device, greatly reducing time costs and thus improving production efficiency.

[0004] To achieve the above objectives, the technical solution adopted by this utility model is as follows: a battery electrode slitting device, comprising: an unwinding mechanism, a slitting mechanism, and a winding mechanism. The unwinding mechanism includes a first unwinding shaft, a second unwinding shaft, a tape-connecting platform, and multiple unwinding rollers. The first unwinding shaft and the second unwinding shaft are each fitted with a detachable roll of material, and the first unwinding shaft and the second unwinding shaft are driven independently. The tape-connecting platform is used to connect battery electrodes on two rolls of material. The battery electrodes on the rolls alternately pass around the unwinding rollers and enter the slitting mechanism. The battery electrodes slid by the slitting mechanism enter the winding mechanism.

[0005] Optionally, the slitting mechanism includes a blade assembly disposed between the unwinding mechanism and the winding mechanism, and the blade assembly is used to slit the battery electrode sheets.

[0006] Optionally, the winding mechanism includes two first winding shafts, a second winding shaft, and multiple winding rollers. Each of the two first winding shafts and the two second winding shafts is fitted with a detachable barrel, and each of the two first winding shafts and the two second winding shafts is driven independently. One battery electrode sheet, cut and flowing out by the slitting mechanism, alternately wraps around the winding rollers and is wound onto the outer wall of the barrel fitted on the first winding shaft. Another battery electrode sheet alternately wraps around the winding rollers and is wound onto the outer wall of the barrel fitted on the second winding shaft.

[0007] Optionally, the axes of one end of the first unwinding shaft and the second unwinding shaft are parallel to the axis of the unwinding roller, and the first unwinding shaft and the second unwinding shaft are symmetrically arranged on both sides of the unwinding roller.

[0008] Optionally, the axis of the first take-up shaft is parallel to the axis of the take-up roller, and the two first take-up shafts are symmetrically arranged on both sides of the take-up roller.

[0009] Optionally, the axis of the second take-up shaft is parallel to the axis of the take-up roller, and the two second take-up shafts are symmetrically arranged on both sides of the take-up roller.

[0010] Optionally, two independently movable clamping bars are provided above the receiving platform. The clamping bars are arranged perpendicular to the direction of movement of the battery electrode, and there is a gap between the clamping bars and the receiving platform that allows the battery electrode to pass through.

[0011] Optionally, the receiving platform has arc-shaped protrusions on both the front and rear sides perpendicular to the direction of movement of the battery electrode.

[0012] Compared with the prior art, the beneficial effects achieved by this utility model are as follows: (1) In this utility model, by setting a first unwinding shaft, a second unwinding shaft, a tape receiving platform and multiple unwinding rollers in the unwinding mechanism, and setting detachable material rolls on the first unwinding shaft and the second unwinding shaft, and driving the first unwinding shaft and the second unwinding shaft independently, the material roll can be disassembled and the material roll can be replaced on the first unwinding shaft when the second unwinding shaft is working. The roll can be changed without delaying the operation of the device, which greatly reduces the time cost and improves the production efficiency. (2) In this utility model, by setting two first winding shafts, a second winding shaft and multiple winding rollers in the winding mechanism, each first winding shaft and each second winding shaft is fitted with a detachable material cylinder, and the two first winding shafts and the two second winding shafts are driven independently. When one first winding shaft and one second winding shaft are working, the material cylinder of the other first winding shaft and the other second winding shaft can be disassembled and replaced. The material cylinder can be replaced without delaying the operation of the device, which further greatly reduces the time cost and improves the production efficiency. (3) In this utility model, by providing arc-shaped protrusions on both the front and rear sides of the receiving platform perpendicular to the direction of movement of the battery electrode, it is possible to avoid damage to the battery electrode due to the hanging strap of the receiving platform during the movement of the battery electrode. Attached Figure Description

[0013] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0014] Figure 1This is a schematic diagram of the structure of the battery electrode cutting device in a preferred embodiment of the present invention; Figure 2 This is a schematic diagram of the first structure of the unwinding mechanism of the battery electrode slitting device in a preferred embodiment of the present invention; Figure 3 This is a schematic diagram of the second structure of the unwinding mechanism of the battery electrode slitting device in a preferred embodiment of this utility model; Figure 4 This is a schematic diagram of the first structure of the winding mechanism of the battery electrode slitting device in a preferred embodiment of the present invention; Figure 5 This is a schematic diagram of the second structure of the winding mechanism of the battery electrode slitting device in a preferred embodiment of the present invention.

[0015] Among them, 1 is the unwinding mechanism; 101 is the first unwinding shaft; 102 is the second unwinding shaft; 103 is the tape receiving platform; 131 is the clamping bar; 132 is the arc-shaped protrusion; and 104 is the unwinding roller. 2. Slitting mechanism; 3. Rewinding mechanism; 301. First rewinding shaft; 302. Second rewinding shaft; 303. Rewinding roller. Detailed Implementation

[0016] The present invention will now be described in further detail with reference to the accompanying drawings and embodiments. These drawings are simplified schematic diagrams, which are only used to illustrate the basic structure of the present invention in a schematic manner, and therefore only show the components related to the present invention.

[0017] It should be noted that if this embodiment involves directional indicators (such as "center," "longitudinal," "lateral," "up," "down," "front," "back," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," etc.), these directional indicators are only used to explain the relative positional relationship and movement of the components in a specific posture. If the specific posture changes, the directional indicators will also change accordingly. 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 indicated technical features. Therefore, features defined with "first" and "second" may explicitly or implicitly include one or more of that feature. Unless otherwise explicitly specified and limited, the terms "set," "connected," and "linked" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal connection of two components. For those skilled in the art, the specific meaning of the above terms in this utility model can be understood according to the specific circumstances. Example 1

[0018] When slitting battery electrodes, after all the battery electrodes on the roll are loaded, the machine needs to be stopped, the roll replaced, and the battery electrodes from the previous roll connected to the battery electrodes on the new roll before the machine is restarted to continue slitting. The time required to replace the roll is relatively long, which reduces the slitting efficiency of the battery electrodes. Therefore, this embodiment provides a battery electrode slitting device.

[0019] like Figure 1 As shown, specifically, the battery electrode slitting device includes: an unwinding mechanism 1, a slitting mechanism 2, and a winding mechanism 3. The unwinding mechanism 1 transports the battery electrode sheets wound on the roll to the slitting mechanism 2, where the slitting mechanism 2 slits them. The slit battery electrode sheets are then transported to the winding mechanism 3, where they are wound onto the roll. Figure 2 As shown, the unwinding mechanism 1 includes a first unwinding shaft 101, a second unwinding shaft 102, a receiving platform 103, and multiple unwinding guide rollers 104. Optionally, the number of unwinding guide rollers 104 is set according to requirements, which will not be elaborated here. Both the first unwinding shaft 101 and the second unwinding shaft 102 are fitted with detachable material rolls. One end of the first unwinding shaft 101 is connected to the output end of a drive motor, and one end of the second unwinding shaft 102 is connected to the output end of another drive motor. The first unwinding shaft 101 and the second unwinding shaft 102 are independently driven by their respective drive motors. The platform 103 is used to connect the battery electrode sheets on the roll sleeved on the first unwinding shaft 101 and the battery electrode sheets on the roll sleeved on the second unwinding shaft 102. The battery electrode sheets alternately pass over multiple unwinding rollers 104 and enter the slitting mechanism 2. It is understood that when slitting the battery electrode sheets, the drive motor corresponding to the first unwinding shaft 101 is working, while the drive motor corresponding to the second unwinding shaft 102 is not working. After all the battery electrode sheets on the roll sleeved on the first unwinding shaft 101 are unwound, the battery electrode sheets on the roll sleeved on the first unwinding shaft 101 are on the connecting platform 103, and the machine stops. Figure 3 As shown, the worker places the battery electrode sheet on the roll fitted on the second unwinding shaft 102 onto the receiving platform 103 and connects it with the battery electrode sheet on the roll fitted on the first unwinding shaft 101. The machine is then turned on. At this time, the drive motor corresponding to the first unwinding shaft 101 is not working, while the drive motor corresponding to the second unwinding shaft 102 is working, continuing the slitting process. During the slitting process, the worker removes the spool fitted on the first unwinding shaft 101 and replaces it with a new roll. While the second unwinding shaft 102 is working, the spool can be disassembled and the roll replaced on the first unwinding shaft 101. This roll replacement can be performed without interrupting the operation of the equipment, greatly reducing time costs and thus improving production efficiency.

[0020] Specifically, the slitting mechanism 2 includes a blade assembly, which is pushed and fixed between the unwinding device and the winding device by a hydraulic trolley, and is used to slit the battery electrode sheets.

[0021] like Figure 2 , Figure 3 As shown, in this embodiment, in order to improve the slitting yield, the axes of the first unwinding shaft 101 and the second unwinding shaft 102 are parallel to the axis of the unwinding roller 104, and the first unwinding shaft 101 and the second unwinding shaft 102 are symmetrically arranged on both sides of the unwinding roller 104. It can be understood that when the battery electrode sheets on the first unwinding shaft 101 and the second unwinding shaft 102 pass around the unwinding roller 104, the risk of battery electrode sheet twisting can be reduced, eliminating the need for workers to constantly adjust the battery electrode sheets, reducing the workload of workers, and reducing the low slitting yield caused by battery electrode sheet twisting, thereby reducing cost waste. Example 2

[0022] Based on Embodiment 1, this embodiment provides a battery electrode cutting device. This embodiment is an optimization based on Embodiment 1 to refine the technical solution. For details not described in this embodiment, please refer to Embodiment 1. This embodiment specifically introduces the structure of the winding mechanism 3.

[0023] When slitting battery electrodes, the winding structure is the same as the unwinding mechanism 1. After the material on the original shaft has finished working, the barrel full of battery electrodes must be unloaded and replaced with a new barrel before it can work. The time required to replace the barrel is relatively long, which reduces the slitting efficiency of battery electrodes.

[0024] like Figure 4As shown, specifically, the winding mechanism 3 includes two first winding shafts 301, a second winding shaft 302, and multiple winding guide rollers 303. Optionally, the number of unwinding guide rollers 104 is set according to requirements, which will not be elaborated here. Each of the two first winding shafts 301 and the two second winding shafts 302 is fitted with a detachable material cylinder. One end of each first winding shaft 301 is connected to the output end of a second drive motor, and one end of each second winding shaft 302 is connected to the output end of another second drive motor. Each first winding shaft 301 and each second winding shaft 302 is independently driven by its corresponding second drive motor. One battery electrode sheet, slit by the cutting mechanism 2, alternately wraps around the take-up roller 303 and is wound onto the outer wall of the cylinder fitted on the first take-up shaft 301. The other battery electrode sheet alternately wraps around the take-up roller 303 and is wound onto the outer wall of the cylinder fitted on the second take-up shaft 302. It can be understood that the cutting mechanism 2 can cut the battery electrode sheet into two pieces. Depending on the requirements, these two battery electrode sheets can be wound separately onto the outer walls of different cylinders. One battery electrode sheet is wound onto the outer wall of the cylinder fitted on the first take-up shaft 301. After the cylinder fitted on the first take-up shaft 301 is fully wound, the machine stops. Figure 5 As shown, the battery electrode is wound onto the outer wall of the cadm sleeved on another first take-up shaft 301. The machine is started and winding continues. At this time, the battery electrode is wound onto the outer wall of the cadm sleeved on the first take-up shaft 301. The second drive motor corresponding to the first take-up shaft 301 is working. The cadm sleeved on the other first take-up shaft 301, which is full of battery electrode, is removed and replaced with a new cadm. The second drive motor corresponding to the first take-up shaft 301 is not working. Another battery electrode is wound onto the outer wall of the cadm sleeved on the second take-up shaft 302. After the cadm sleeved on the second take-up shaft 302 is full, the machine is stopped, and the battery electrode is wound onto the outer wall of the cadm sleeved on the other second take-up shaft 302. On the outer wall of the aforementioned barrel, the machine is turned on and continues to wind. At this time, the battery electrode sheets are wound around the outer wall of the aforementioned barrel sleeved on a second take-up shaft 302. The second drive motor corresponding to the second take-up shaft 302 works, and the aforementioned barrel full of battery electrode sheets sleeved on another second take-up shaft 302 is removed and replaced with a new barrel. The second drive motor corresponding to the second take-up shaft 302 works. When one first take-up shaft 301 and one aforementioned second take-up shaft 302 are working, the barrel of the other first take-up shaft 301 and the other aforementioned second take-up shaft 302 can be disassembled and replaced. The barrel replacement can be carried out without delaying the operation of the device, which further greatly reduces time costs and improves production efficiency.

[0025] like Figure 4As shown, in this embodiment, in order to improve the slitting yield, the axis of the first take-up shaft 301 is parallel to the axis of the take-up roller 303. The two first take-up shafts 301 are symmetrically arranged on both sides of the unwinding roller 104. It can be understood that when the battery electrode is wound around the first take-up shaft 301 after passing around the take-up roller 303, the risk of battery electrode twisting can be reduced. It eliminates the need for workers to adjust the battery electrode at all times, reduces the workload of workers, improves the slitting yield, and avoids creases on the battery electrode wound on the barrel due to battery electrode twisting.

[0026] like Figure 5 As shown, in this embodiment, in order to improve the slitting yield, the axis of the second take-up shaft 302 is parallel to the axis of the take-up roller 303. The two second take-up shafts 302 are symmetrically arranged on both sides of the unwinding roller 104. It can be understood that when the battery electrode is wound around the take-up roller 303 and onto the second take-up shaft 302, the risk of battery electrode twisting can be reduced. It eliminates the need for workers to constantly adjust the battery electrode, reduces the workload of workers, improves the slitting yield, and avoids creases on the battery electrode wound on the barrel due to battery electrode twisting. Example 3

[0027] Based on Embodiment 1 and Embodiment 2, this embodiment provides a battery electrode cutting device. This embodiment is an optimization based on Embodiment 1 and Embodiment 2 to refine the technical solution. For details not described in this embodiment, please refer to Embodiment 1 and Embodiment 2. This embodiment specifically introduces other structures of the above-mentioned connecting platform 103.

[0028] like Figure 2As shown, specifically, two independently lifting clamping bars 131 are provided above the aforementioned receiving platform 103. The clamping bars 131 are perpendicular to the direction of movement of the battery electrode sheets. There is a gap between the clamping bars 131 and the receiving platform 103 allowing the battery electrode sheets to pass through. It can be understood that after all the battery electrode sheets on the roll mounted on the first unwinding shaft 101 have been unwound, the end of the battery electrode sheet detaches from the roll mounted on the first unwinding shaft 101. When the end of the battery electrode sheet passes above the receiving platform 103, it can pass through the clamping bars 131 located in front of the battery electrode sheet's forward direction. 1. Clamp the end of the battery electrode sheet, then move the front end of the battery electrode sheet on the roll sleeved on the second unwinding shaft 102 to above the receiving platform 103. Clamp the front end of the battery electrode sheet on the roll sleeved on the second unwinding shaft 102 with another clamping bar 131. Then, on the receiving platform, align the tail end of the battery electrode sheet on the roll sleeved on the first unwinding shaft 101 with the head end of the battery electrode sheet on the roll sleeved on the second unwinding shaft 102. Use tape to bond and fix the alignment. After alignment, release the two clamping bars 131 and start the machine.

[0029] like Figure 3 As shown, preferably, the aforementioned connecting platform 103 has arc-shaped protrusions 132 on both the front and rear sides perpendicular to the direction of movement of the battery electrode, which can prevent the battery electrode from being damaged by the connecting platform 103 during the movement.

[0030] Working principle: When slitting the battery electrode sheets, the drive motor corresponding to the first unwinding shaft 101 is working, while the drive motor corresponding to the second unwinding shaft 102 is not working. The battery electrode sheets on the roll sleeved on the first unwinding shaft 101 are slit by the slitting mechanism 2, and the slits are wound onto the first take-up shaft 301 and the second take-up shaft 302 respectively. After the battery electrode sheets on the roll sleeved on the first unwinding shaft 101 are unwound, the machine is stopped. The operator connects the first end of the battery electrode sheet on the roll sleeved on the second unwinding shaft 102 to the tail end of the battery electrode sheet on the roll sleeved on the first unwinding shaft 101, and then starts the machine. At this time, the drive motor corresponding to the first unwinding shaft 101 is not working, and the drive motor corresponding to the second unwinding shaft 102 is not working. When the drive motor is working, the cutting continues, and the material rolls on the first unwinding shaft 101 that have been loaded with battery electrodes are replaced. After the material rolls on the first winding shaft 301 and the second winding shaft 302 are fully wound with battery electrodes, the machine stops, and the battery electrodes are wound onto another first winding shaft 301 and another second winding shaft 302. The machine is then started, and the cutting continues. At this time, the drive motors corresponding to the first winding shaft 301 and the second winding shaft 302 that are fully wound with battery electrodes are not working, while the drive motors corresponding to the first winding shaft 301 and the second winding shaft 302 that are not fully wound with battery electrodes are working. At the same time, the material rolls on the first winding shaft 301 and the second winding shaft 302 that are fully wound with battery electrodes are replaced.

[0031] Based on the preferred embodiments of this utility model described above, those skilled in the art can make various changes and modifications without departing from the technical concept of this utility model. The technical scope of this utility model is not limited to the contents of the specification, but must be determined according to the scope of the claims.

Claims

1. A battery electrode cutting device, comprising: The unwinding mechanism (1), the slitting mechanism (2), and the winding mechanism (3) are characterized in that: the unwinding mechanism (1) includes a first unwinding shaft (101), a second unwinding shaft (102), a tape receiving platform (103), and a plurality of unwinding rollers (104). The first unwinding shaft (101) and the second unwinding shaft (102) are each fitted with detachable material rolls, and the first unwinding shaft (101) and the second unwinding shaft (102) are driven independently. The tape receiving platform (103) is used to connect the battery electrode sheets on the two material rolls. The battery electrode sheets on the material rolls alternately pass around the unwinding rollers (104) and enter the slitting mechanism (2). The battery electrode sheets slid by the slitting mechanism (2) enter the winding mechanism (3).

2. The battery electrode cutting device according to claim 1, characterized in that: The slitting mechanism (2) includes a blade assembly, which is disposed between the unwinding mechanism (1) and the winding mechanism (3), and the blade assembly is used to slit the battery electrode sheets.

3. The battery electrode cutting device according to claim 1, characterized in that: The winding mechanism (3) includes two first winding shafts (301), a second winding shaft (302), and multiple winding rollers (303). Each of the two first winding shafts (301) and the two second winding shafts (302) is fitted with a detachable material cylinder. Each of the two first winding shafts (301) and the two second winding shafts (302) is driven independently. One battery electrode sheet cut out by the slitting mechanism (2) alternately passes around the winding rollers (303) and is wound around the outer wall of the material cylinder fitted on the first winding shaft (301). Another battery electrode sheet alternately passes around the winding rollers (303) and is wound around the outer wall of the material cylinder fitted on the second winding shaft (302).

4. The battery electrode cutting device according to claim 1, characterized in that: One end of the first unwinding shaft (101) and the axis of the second unwinding shaft (102) are parallel to the axis of the unwinding roller (104), and one end of the first unwinding shaft (101) and the second unwinding shaft (102) are symmetrically arranged on both sides of the unwinding roller (104).

5. The battery electrode cutting device according to claim 3, characterized in that: The axis of the first take-up shaft (301) is parallel to the axis of the take-up roller (303), and the two first take-up shafts (301) are symmetrically arranged on both sides of the take-up roller (303).

6. The battery electrode cutting device according to claim 3, characterized in that: The axis of the second take-up shaft (302) is parallel to the axis of the take-up roller (303), and the two second take-up shafts (302) are symmetrically arranged on both sides of the take-up roller (303).

7. The battery electrode cutting device according to claim 1, characterized in that: Above the receiving platform (103) are two independently movable clamping bars (131). The clamping bars (131) are arranged perpendicular to the direction of movement of the battery electrode. There is a gap between the clamping bars (131) and the receiving platform (103) that allows the battery electrode to pass through.

8. The battery electrode cutting device according to claim 7, characterized in that: The receiving platform (103) has arc-shaped protrusions (132) on both the front and rear sides perpendicular to the direction of movement of the battery electrode.

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