Winding drum tool with rewinding function, winding drum assembly and splitting machine

Abstract

The utility model provides a winding drum tool with a back-winding function, a winding drum assembly and a splitting machine. The winding drum tool with the back-winding function comprises a main body part, a winding drum bottom and a winding drum top, the winding drum bottom and the winding drum top are arranged at the two ends of the main body part respectively, the winding drum bottom and the winding drum top are coaxially arranged, and the outer diameter of the main body part is gradually reduced from the winding drum bottom to the winding drum top along the axis of the main body part. The winding drum tool with the rewinding function can replace a winding drum of an unwinding mechanism of an original splitting machine, so that small pole pieces which are wound irregularly can be rewound on the splitting machine, and the pole pieces which are wound irregularly are rewound into qualified pole pieces. The winding drum tool is simple in overall structure and convenient and fast to install, the structure of an original splitting machine does not need to be changed, uneven pole pieces can be processed and wound on the splitting machine without other devices, the function utilization of the splitting machine is maximized, the use and production cost is reduced, and the yield and the qualification rate of the pole pieces are improved.

Description

Technical Field

[0001] This application relates to the field of slitting device technology, and in particular to a roll tooling with rewinding function, a roll assembly and a slitting machine. Background Technology

[0002] Lithium-ion batteries have advantages such as high voltage, high specific energy, many cycles, and long storage time. They are widely used not only in portable electronic devices such as mobile phones, digital cameras, and laptops, but also in large and medium-sized electric equipment such as electric vehicles, electric bicycles, and power tools. Therefore, the safety requirements for lithium-ion batteries are becoming increasingly stringent, and the quality requirements for manufactured products are becoming increasingly strict.

[0003] The winding drum plays a crucial role as the link between the electrode sheets and the next process. Occasionally, the slitting machine encounters problems with uneven electrode winding during production, and electrode sheets exceeding the process specifications cannot be properly transferred to the next process. Once this problem occurs, the slitting machine's operation is irreversible and cannot be resolved by the machine itself.

[0004] Therefore, it is necessary to design a rolling tool with a rewinding function to solve the above problems. Utility Model Content

[0005] In view of this, in order to overcome the shortcomings of the prior art, this utility model provides a roll tooling, roll assembly and slitting machine with rewinding function, which effectively solves the problem that if the electrode sheets are not rolled up evenly during the production process, the slitting machine itself cannot solve the problem of unqualified electrode sheets.

[0006] According to a first aspect of the present invention, a roll tooling with a rewinding function is provided for a slitting machine, wherein the roll tooling with the rewinding function includes a main body, a roll bottom and a roll top, the roll bottom and the roll top are respectively disposed at both ends of the main body, the roll bottom and the roll top are coaxially disposed, and the outer diameter of the main body gradually decreases along the axis of the main body from the roll bottom toward the roll top.

[0007] Preferably, the slitting machine includes an unwinding mechanism and a winding mechanism, the roll tooling with rewinding function is disposed on the unwinding mechanism, and the size of the top of the roll corresponds to the size of the winding roll of the winding mechanism.

[0008] Preferably, the main body is formed into a frustum-shaped structure, and the main body, the bottom of the roll, and the top of the roll are coaxially arranged.

[0009] Preferably, the first end of the main body is smoothly connected to the bottom of the roll, and the size of the top of the roll is smaller than the size of the second end of the main body so that a step is formed between the top of the roll and the second end of the main body, the step being used to limit the electrode sheet after rewinding.

[0010] According to a second aspect of the present invention, a roll assembly is provided, wherein the roll assembly includes a roll tooling with a rewinding function as described above.

[0011] Preferably, the roll assembly further includes a take-up ring and an electrode plate, and the roll tooling with rewinding function is disposed on the side of the take-up ring and the electrode plate.

[0012] Preferably, a winding tool with a rewinding function is provided on both sides of the winding ring and the electrode sheet.

[0013] Preferably, the two rewinding tooling units are arranged symmetrically.

[0014] According to a third aspect of the present invention, a slitting machine is provided, wherein the slitting machine includes the roll assembly as described above.

[0015] Preferably, the slitting machine can switch between a slitting state and a rewinding state. When the slitting machine is in the slitting state, the unwinding mechanism of the slitting machine uses a regular roll, the electrode sheet is placed on the regular roll and slit, and then wound up by the rewinding mechanism of the slitting machine. When the electrode sheet is not wound up evenly, the slitting machine is in the rewinding state, the unwinding mechanism of the slitting machine uses the roll assembly, the roll assembly is installed on the slitting machine through the bottom of the roll, one end of the electrode sheet to be rewinded is placed on the rewinding ring and the electrode sheet, and the rewinding action turns the electrode sheet to be rewinded into a qualified electrode sheet.

[0016] According to this utility model, a rewinding-function roll fixture, through the cooperation of its main body, bottom, and top, allows the rewinding-function roll fixture to replace the unwinding mechanism roll of the original slitting machine. This ensures the replaced roll fixture corresponds to the winding mechanism roll of the slitting machine, allowing unevenly wound electrode sheets to be rewound on the slitting machine, transforming them into qualified electrode sheets. This rewinding-function roll fixture has a simple overall structure and is quick and easy to install. It does not require changes to the original slitting machine structure and can process unevenly wound electrode sheets on the slitting machine without additional devices, maximizing the functionality of the slitting machine, reducing usage and production costs, and increasing electrode sheet yield and pass rate.

[0017] To make the above-mentioned objectives, features and advantages of this application more apparent and understandable, preferred embodiments are described below in detail with reference to the accompanying drawings. Attached Figure Description

[0018] To more clearly illustrate the technical solutions of the embodiments of this application, the accompanying drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this application and should not be regarded as a limitation of the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0019] Figure 1 A schematic diagram of a rewinding tooling with a rewinding function according to an embodiment of the present invention is shown.

[0020] Figure 2 A schematic diagram of the structure of a rewinding tool with a rewinding function according to an embodiment of the present invention is shown from the bottom view of the rewinding drum.

[0021] Figure 3 A schematic diagram of the top view of a rewinding tool with a rewinding function according to an embodiment of the present invention is shown.

[0022] Figure 4 A schematic diagram of the structure of a roll assembly according to an embodiment of the present invention is shown;

[0023] Figure 5 A schematic diagram of the slitting machine in the slitting state according to an embodiment of the present invention is shown;

[0024] Figure 6 A schematic diagram of the slitting machine according to an embodiment of the present invention is shown in the case of being in a rewinding state.

[0025] Reference numerals: 101-Main body; 102-Bottom of drum; 103-Top of drum; 104-Stepped section; 2-Rewinding ring and electrode sheet; 3-Slitting machine; 301-Unwinding mechanism; 302-Rewinding mechanism. Detailed Implementation

[0026] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. The components of the embodiments of this application described and shown in the accompanying drawings can generally be arranged and designed in various different configurations. Therefore, the following detailed description of the embodiments of this application provided in the accompanying drawings is not intended to limit the scope of the claimed application, but merely represents selected embodiments of this application. All other embodiments obtained by those skilled in the art based on the embodiments of this application without inventive effort are within the scope of protection of this application.

[0027] In the description of the embodiments of this application, it should be noted that the terms "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship commonly used when the product of this application is in use. They are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this application. In addition, the terms "first," "second," and "third," etc., are only used to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0028] Furthermore, terms such as "horizontal" and "vertical" do not imply that components must be absolutely horizontal or suspended, but rather that they can be slightly tilted. For example, "horizontal" simply means that its direction is more horizontal than "vertical," and does not mean that the structure must be completely horizontal, but can be slightly tilted.

[0029] In the description of the embodiments of this application, it should also be noted that, unless otherwise explicitly specified and limited, the terms "set," "install," "connect," and "connect" 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 mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0030] According to a first aspect of this utility model, a rolling device with a rewinding function is provided, such as... Figures 1 to 3 As shown, this rewinding tool is used for, for example, the following: Figure 5 and Figure 6 The slitting machine 3 in the middle allows the defective electrode sheets produced by the slitting machine 3 to be rewound. The slitting machine 3 may include an unwinding mechanism 301 and a winding mechanism 302. The electrode sheets can be placed in the unwinding mechanism 301 and slitted by the slitting machine 3 to obtain multiple small electrode sheets of the same width. The winding mechanism 302 is then used to wind up the electrode sheets to complete the slitting operation.

[0031] The rewinding device includes a main body 101, a bottom part 102, and a top part 103. In the following description, reference will be made to... Figures 1 to 3 The detailed structure of the main body 101, bottom 102, and top 103 of the rewinding tool is described in detail.

[0032] like Figures 1 to 3As shown, in this embodiment, the bottom 102 and top 103 of the roll are respectively located at both ends of the main body 101. Specifically, the roll fixture needs to meet two conditions to achieve the rewinding operation: First, it needs to ensure that it can replace the original ordinary roll. The two ends of the original ordinary roll are installed in the air-expansion chucks of the unwinding mechanism 301 of the slitting machine 3 for inflation and fixation. Therefore, in order to ensure replaceability and universality, the connection end of the roll fixture and the unwinding mechanism 301 of the slitting machine 3 need to match; second, the roll fixture needs to match the slitting of the small electrode sheets to ensure that unqualified electrode sheets can be rewinded. Furthermore, the size of the bottom 102 of the roll can correspond to the size of the original ordinary roll, so that the roll fixture can be installed on the slitting machine 3 without adjusting the structure of the slitting machine 3, which is convenient for operation and installation. The size of the top 103 of the roll can correspond to the size of the roll of the winding mechanism 302 of the slitting machine 3. Even if small electrode sheets that are not wound up evenly appear on the roll of the winding mechanism 302 during the slitting process, the small electrode sheets on the roll of the winding mechanism 302 can be rewound to the top 103 of the roll by reversing the rotating shaft of the slitting machine 3, thereby processing the unqualified small electrode sheets.

[0033] Furthermore, in order to ensure the regularity of the roll fixture and facilitate the rewinding operation of the slitting machine 3, the bottom 102 and the top 103 of the roll need to be coaxially set. The roll fixture can also maintain stability during rotation and reduce the possibility of uneven winding during rewinding.

[0034] like Figure 2 As shown, the bottom 102 of the roll can be formed as a hollow cylindrical structure, with an inner diameter of, for example, 6 inches in this embodiment, to cooperate with the air-expanding chuck of the unwinding mechanism 301 of the slitting machine 3, allowing the air-expanding chuck to be inserted into the interior of the bottom 102 of the roll, thereby achieving the connection between the roll fixture and the unwinding mechanism 301 of the slitting machine 3. Figure 3 As shown, the top 103 of the drum can be formed as a solid cylindrical structure, and its outer diameter in the embodiment can be, for example, 3 inches. The 3-inch outer diameter can match the winding ring described below, so that the winding ring can be sleeved on the top 103 of the drum to complete the subsequent rewinding action.

[0035] Furthermore, the outer diameter of the main body 101 gradually decreases along the axis of the main body 101 from the bottom 102 of the drum toward the top 103 of the drum. For example... Figure 1As shown, in order to ensure the continuity and formability of the roll tooling, the main body 101 can be approximately a frustum-shaped structure. The main body 101 has a continuous inclined angle from the bottom 102 of the roll to the top 103 of the roll, which makes the rewinding process smoother and the rewinding forming effect better. This results in good overall load-bearing capacity, making it less prone to breakage and pollution, and ensuring stability during rotation, thereby reducing the possibility of uneven winding during rewinding.

[0036] Furthermore, in order to ensure compatibility with the slitting machine 3, therefore, as Figure 5 and Figure 6 As shown, the lengths of the two facing roll fixtures need to correspond to the length of the unwinding mechanism 301 of the slitting machine 3. Specifically, the unwinding mechanism 301 has two air-expanding chucks at both ends inside, which can be inserted into the bottom 102 of the rolls of the two facing roll fixtures respectively.

[0037] In this embodiment, the unwinding mechanism 301 of the slitting machine 3 has a 6-inch drum size. To correspond to the original drum size, the inner diameter of the bottom 102 of the drum fixture is also 6 inches. The winding mechanism 302 of the slitting machine 3 has a 3-inch drum size, therefore the outer diameter of the top 103 of the drum fixture is also 3 inches. This results in a variable-diameter structure with a larger bottom and a smaller top. This variable-diameter structure can correspond to both the unwinding mechanism 301 and the winding mechanism 302 of the slitting machine 3. This arrangement allows the electrode sheet on the winding mechanism 302 to be rewound onto the drum fixture located at the unwinding mechanism 301 without altering the structure of the slitting machine 3.

[0038] The rewinding tool is made entirely of non-metallic material, which is pressure-resistant, wear-resistant, and does not produce metal foreign objects. In addition, in this embodiment, the main body 101, the bottom of the drum 102, and the top of the drum 103 are integrally formed.

[0039] This rewinding-functional spool fixture, through the cooperation of its main body 101, bottom 102, and top 103, allows it to replace the unwinding mechanism 301 of the original slitting machine 3. The replaced spool fixture then aligns with the winding mechanism 302 of the slitting machine 3, enabling the rewinding of unevenly wound electrode sheets on the slitting machine 3, transforming them into qualified electrode sheets. This rewinding-functional spool fixture has a simple overall structure and is quick and easy to install. It does not require changes to the original structure of the slitting machine 3 and can process unevenly wound electrode sheets on the slitting machine 3 without additional devices, maximizing the functionality of the slitting machine 3, reducing usage and production costs, and increasing electrode sheet yield and pass rate.

[0040] Preferably, such as Figures 1 to 3 , Figure 5 and Figure 6 As shown, in this embodiment, when the slitting machine 3 performs a rewinding operation, the rewinding tooling is installed on the unwinding mechanism 301. Furthermore, in order to achieve the rewinding operation, the size of the top 103 of the roll needs to correspond to the size of the take-up roll of the take-up mechanism 302. In this embodiment, the size of the take-up roll of the take-up mechanism 302 is 3 inches, and correspondingly, the size of the top 103 of the roll is also 3 inches.

[0041] Preferably, such as Figures 1 to 3 As shown, in this embodiment, the main body 101 is formed into a frustum-shaped structure, and the main body 101, the bottom of the drum 102, and the top of the drum 103 are coaxially arranged. To improve the aesthetics and overall strength of the tooling, the main body 101, the bottom of the drum 102, and the top of the drum 103 are coaxially arranged, resulting in a neat and tidy appearance; a robust and durable structure that is easy to clean; convenient installation and replacement by the user; a small overall size that saves space; and good overall load-bearing capacity, making it less prone to breakage and preventing pollution.

[0042] Preferably, such as Figures 1 to 4 As shown, in this embodiment, the first end of the main body 101 is smoothly connected to the bottom 102 of the roll, and the size of the top 103 of the roll is smaller than the size of the second end of the main body 101, so that a step 104 is formed between the top 103 of the roll and the second end of the main body 101. The step 104 is used to limit the electrode sheet after rewinding. See also Figure 4 To prevent the small electrode sheets from shifting or becoming uneven after rewinding, the second end of the main body 101 is larger than the top of the roll 103, so that the small electrode sheets can be neatly wound and the problem of uneven winding can be avoided again.

[0043] This rewinding-functional drum fixture, through the cooperation of its main body, bottom, and top sections, allows it to replace the unwinding drum of the original slitting machine. The replaced drum fixture then aligns with the winding drum of the slitting machine, enabling the rewinding of unevenly wound electrode sheets on the slitting machine, transforming them into qualified sheets. This rewinding-functional drum fixture has a simple overall structure and is quick and easy to install. It does not require changes to the original slitting machine structure or additional devices to process unevenly wound electrode sheets on the slitting machine, maximizing the machine's functionality, reducing operating and production costs, and increasing electrode sheet yield and pass rate.

[0044] like Figure 4As shown, according to a second aspect of the present invention, a roll assembly is provided, the roll assembly including the roll fixture with a rewinding function as described above. This roll assembly can be used for the rewinding operation of a slitting machine 3. The roll assembly may further include a take-up ring and an electrode plate 2. It is understood that... Figure 4 The labels refer to the winding ring and the electrode sheet wound on the winding ring, i.e., the winding ring and electrode sheet 2. The winding ring and electrode sheet 2 correspond to the size of the winding drum (here, the winding drum is the winding drum of the winding mechanism 302 of the slitting machine 3 mentioned above). The aforementioned drum fixture with rewinding function is set on the side of the winding ring and electrode sheet 2. Small electrode sheets that need to be rewinded can be rewinded onto the winding ring and electrode sheet 2, thereby forming neatly wound electrode sheets.

[0045] Preferably, such as Figure 4 As shown in the embodiment, a rewinding tool with a rewinding function is provided on both sides of the winding ring and the electrode 2. This arrangement allows the rewind assembly to directly replace the original ordinary rewind and to be directly installed on the unwinding mechanism 301 of the slitting machine 3.

[0046] Preferably, such as Figure 4 As shown, in this embodiment, two rewinding tooling fixtures are symmetrically arranged. Since the two ends of the rewinding tooling fixtures are the larger bottom 102 and the smaller top 103 of the drum, respectively, firstly, the symmetrical arrangement of the two rewinding tooling fixtures ensures stability during rotation; secondly, the symmetrical arrangement of the two rewinding tooling fixtures ensures replaceability during connection, allowing the drum assembly to directly replace the original ordinary drum, which requires that both ends of the rewinding tooling fixture be the bottom 102 of the drum; furthermore, in order to realize the rewinding operation, the take-up ring and the pole piece 2 need to be provided with the top 103 of the drum on both sides.

[0047] This roll assembly replaces the original ordinary roll and assists the slitting machine 3 in performing the rewinding operation by setting two roll fixtures with rewinding function on both sides of a take-up ring and electrode 2 respectively.

[0048] In addition, such as Figure 5 and Figure 6 As shown, a slitting machine 3 is provided according to a third aspect of the present invention, the slitting machine 3 including the roll assembly as described above.

[0049] Because this slitting machine 3 uses the aforementioned roll assembly, it can operate in the slitting state ( Figure 5 ) and rewind state ( Figure 6 The mechanism switches between two states, and the difference between these two states is that in the slitting state, the unwinding mechanism 301 uses a regular 6-inch spool, while in the rewinding state, the unwinding mechanism 301 uses the aforementioned spool assembly.

[0050] When the slitting machine 3 is in the slitting state, the unwinding mechanism 301 of the slitting machine 3 uses a regular roll. At this time, the electrode sheet is slitting. The electrode sheet is placed on the regular roll and slitting by the slitting machine 3. It is then wound up by the winding mechanism 302 of the slitting machine 3. If unevenly wound electrode sheets occur during the slitting process (during the winding process, due to various factors, deviations may occur when each loop of electrode sheets is stacked, which is called uneven winding; electrode sheets with a deviation ≥1mm cannot be used normally and will be scrapped), then the slitting machine 3 needs to be used in the rewinding state. That is, when uneven winding occurs, the slitting machine 3 is in the rewinding state. The unwinding mechanism 301 of the slitting machine 3 uses a roll assembly. The roll assembly is installed on the slitting machine 3 through the roll bottom 102 (the size of the roll bottom 102 corresponds to the size of a normal roll, so it can be directly installed on the slitting machine 3. For example, the installation method can be to insert the two roll bottoms 102 of the roll assembly into the air-expanding chuck of the unwinding mechanism 301 of the slitting machine 3 and inflate and fix it). One end of the electrode sheet to be rewound is set between the winding ring and the electrode sheet 2. The rewinding action turns the electrode sheet to be rewound into a qualified electrode sheet.

[0051] This slitting machine uses a roll assembly, which allows it to be compatible with both unwinding and rewinding operations, maximizing the functionality of the slitting machine. Without changing the original structure of the slitting machine, it can handle unevenly wound electrode sheets on its own, reducing production costs. At the same time, by avoiding unevenly wound electrode sheets in the product, it saves costs and improves the yield qualification rate.

[0052] Finally, it should be noted that the above-described embodiments are merely specific implementations of this application, used to illustrate the technical solutions of this application, and not to limit them. The protection scope of this application is not limited thereto. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that any person skilled in the art can still modify or easily conceive of changes to the technical solutions described in the foregoing embodiments, or make equivalent substitutions for some of the technical features, within the technical scope disclosed in this application. Such modifications, changes, or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this application, and should all be covered within the protection scope of this application. Therefore, the protection scope of this application should be determined by the protection scope of the claims.

Claims

1. A rolling fixture with a rewinding function for a slitting machine, characterized in that, The rewinding tooling includes a main body, a bottom part of the rewinding drum, and a top part of the rewinding drum. The bottom part of the rewinding drum and the top part of the rewinding drum are respectively located at both ends of the main body. The bottom part of the rewinding drum and the top part of the rewinding drum are coaxially arranged. The outer diameter of the main body gradually decreases from the bottom part of the rewinding drum toward the top part of the rewinding drum along the axis of the main body.

2. The rewinding tooling with a rewinding function according to claim 1, characterized in that, The slitting machine includes an unwinding mechanism and a winding mechanism. The roll tooling with rewinding function is installed in the unwinding mechanism, and the size of the top of the roll corresponds to the size of the winding roll of the winding mechanism.

3. The rewinding tooling with a rewinding function according to claim 2, characterized in that, The main body is formed into a frustum-shaped structure, and the main body, the bottom of the drum, and the top of the drum are coaxially arranged.

4. The rewinding tooling with a rewinding function according to claim 3, characterized in that, The first end of the main body is smoothly connected to the bottom of the roll. The size of the top of the roll is smaller than the size of the second end of the main body so that a step is formed between the top of the roll and the second end of the main body. The step is used to limit the electrode sheet after rewinding.

5. A reel assembly, characterized in that, The roll assembly includes a roll tooling with a rewinding function as described in any one of claims 1 to 4.

6. The reel assembly according to claim 5, characterized in that, The roll assembly also includes a take-up ring and an electrode plate, and the roll fixture with rewinding function is disposed on the side of the take-up ring and the electrode plate.

7. The reel assembly according to claim 6, characterized in that, The winding ring and the electrode sheet are respectively provided with a winding tool with a rewinding function on both sides.

8. The reel assembly according to claim 6, characterized in that, The two rewinding roller fixtures are arranged symmetrically.

9. A slitting machine, characterized in that, The slitting machine includes the roll assembly according to any one of claims 6 to 8.

10. The slitting machine according to claim 9, characterized in that, The slitting machine can switch between a slitting state and a rewinding state. When the slitting machine is in the slitting state, the unwinding mechanism of the slitting machine uses a regular roll, the electrode is placed on the regular roll and is slitted, and is rewound by the rewinding mechanism of the slitting machine. When the electrode sheet is not wound evenly, the slitting machine is in a rewinding state. The unwinding mechanism of the slitting machine uses the roll assembly. The roll assembly is installed on the slitting machine through the bottom of the roll. One end of the electrode sheet to be rewound is set between the winding ring and the electrode sheet. The rewinding action turns the electrode sheet to be rewound into a qualified electrode sheet.

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