A two-way calendering roll press

Abstract

The utility model discloses a kind of two-way calendering's roll press, belong to battery pole piece production technical field.A kind of two-way calendering's roll press, including successively for winding electrode film's flow casting roller, guide roller, winding roller, wherein, guide roller and winding roller between being equipped with calendering part;The calendering part includes the guide frame being set on the both sides of electrode film, the guide frame is inclined to be set, clamping portion is slidably connected in the guide frame, the clamping portion is detachably connected on electrode film, wherein, when the clamping portion slides in guide frame, for pulling electrode film to both sides;The utility model is by the cooperation of inclined guide frame and clamping portion, winding roller and guide roller speed difference, synchronously realizes electrode film transverse and longitudinal two-way calendering, guarantees film material thickness and density uniformity;Clamping portion uses electromagnet magnetic attraction cooperation, guide column misplacement design and rubber non-slip pad, reliable clamping is realized and avoid film material damage, improve product pass rate.

Description

Technical Field

[0001] This utility model relates to the field of battery electrode production technology, and in particular to a bidirectional calendering roll press. Background Technology

[0002] In the electrode preparation process of new energy batteries, the electrode film calendering process is a key step to achieve densification of active materials and ensure the stability of electrode structure. The rationality of its process is directly related to the energy density, cycle stability and safety of the battery. Currently, the mainstream rolling mills in the industry generally adopt a unidirectional calendering structure design. During the calendering operation, only the longitudinal or transverse rolling force can be applied to the electrode film, and only the material extension and densification treatment in a single dimension can be achieved.

[0003] Since the electrode film itself is a composite material made up of a mixture of active materials, binders, conductive agents and other components, concentrated rolling force in one direction can easily lead to uneven stress transmission inside the material, making it impossible for the active material particles to form a uniform arrangement, which in turn causes problems such as insufficient uniformity of electrode film thickness and inconsistent overall density distribution. Utility Model Content

[0004] The purpose of this invention is to solve the problems mentioned in the background art and to propose a bidirectional calendering roll press.

[0005] To achieve the above objectives, the present invention adopts the following technical solution:

[0006] A bidirectional calendering roll press includes a casting roll, a guide roll, and a winding roll for winding an electrode film in sequence, wherein a calendering section is provided between the guide roll and the winding roll; the calendering section includes guide frames disposed on both sides of the electrode film, the guide frames being inclined, and a clamping part slidably connected inside the guide frame, the clamping part being detachably connected to the electrode film, wherein when the clamping part slides inside the guide frame, it is used to pull the electrode film to both sides.

[0007] To facilitate the calendering of the electrode film, preferably, the clamping part includes a clamping frame, the clamping frame has an electromagnet built in it, a magnetic plate is slidably connected to the clamping frame, the electromagnet is attracted to the magnetic plate when energized, a return spring is fixedly connected to the magnetic plate, and the other end of the return spring is fixedly connected to the clamping frame.

[0008] To prevent the magnetic plate from becoming misaligned, preferably, a guide post is fixedly connected to the magnetic plate, and the clamping frame is provided with a guide hole that matches the guide post.

[0009] To prevent damage to the motor diaphragm, preferably, the end of the magnetic plate or clamp that is in contact with the electrode diaphragm is provided with a rubber anti-slip pad.

[0010] Preferably, the system also includes a robotic arm. The guide frame has an insertion area and a removal area at both ends for inserting and removing the clamping frame. The robotic arm is located in the insertion area and is used to place the clamping frame in the removal area into the insertion area.

[0011] To facilitate the insertion of the clamping frame into the guide frame, preferably, the guide rail opening on the side of the guide frame near the placement area is set at an angle.

[0012] Compared with the prior art, the present invention provides a bidirectional calendering roll press, which has the following beneficial effects:

[0013] The parts of this device not described herein are the same as or can be implemented using existing technologies. This utility model achieves bidirectional calendering of the electrode film in both the transverse and longitudinal directions through the cooperation of the inclined guide frame and the clamping part, and the speed difference between the winding roller and the guide roller, ensuring uniformity of film thickness and density. The clamping part adopts an electromagnet magnetic attraction, a guide post anti-misalignment design, and a rubber anti-slip pad to achieve reliable clamping and avoid damage to the film material, thereby improving the product qualification rate. The clamping part is automatically recycled and reused with the help of a robotic arm, an insertion area, and an extraction area. Combined with the inclined opening of the guide frame to prevent jamming, it ensures continuous operation, reduces labor costs, and improves production efficiency. At the same time, the overall structure is compact and reasonable, and the operation and maintenance are convenient. The clamping part and the guide frame can be adapted to different specifications of electrode films, with a wide range of applications, and can meet the diverse production needs of battery electrode sheets. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the structure of a bidirectional calendering roller press proposed in this utility model;

[0015] Figure 2 This is a schematic diagram of the guide frame of a bidirectional calendering roller press proposed in this utility model;

[0016] Figure 3 This is a schematic diagram of the clamping frame of a bidirectional calendering roller press proposed in this utility model;

[0017] Figure 4 This is a cross-sectional structural diagram of a bidirectional calendering roller press proposed in this utility model.

[0018] In the diagram: 1. Casting roller; 101. Guide roller; 102. Winding roller; 103. Electrode film; 2. Guide frame; 3. Clamping frame; 301. Electromagnet; 4. Magnetic plate; 401. Return spring; 402. Guide post; 403. Guide hole; 5. Placement area; 501. Removal area. Detailed Implementation

[0019] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments.

[0020] Example 1:

[0021] Reference Figure 1-4 A bidirectional calendering roll press includes a casting roll 1, a guide roll 101, and a winding roll 102 for winding an electrode film 103 in sequence. A calendering section is provided between the guide roll 101 and the winding roll 102. The calendering section includes guide frames 2 disposed on both sides of the electrode film 103. The guide frames 2 are inclined. A clamping part is slidably connected inside the guide frame 2. The clamping part is detachably connected to the electrode film 103. When the clamping part slides inside the guide frame 2, it is used to pull the electrode film 103 to both sides to extend the electrode film 103 laterally. The electrode film 103 is extended longitudinally by the speed difference between the winding roll 102 and the guide roll 101.

[0022] It should be noted that rollers can also be set in the calendering section to pre-calender the electrode film 103.

[0023] The clamping part includes a clamping frame 3, which houses an electromagnet 301 and a battery compartment containing a battery for powering the electromagnet 301. A magnetic plate 4 is slidably connected to the clamping frame 3. When the electromagnet 301 is clamped on the electrode film 103 by the clamping frame 3, it is energized and magnetically attracted to the magnetic plate 4. A return spring 401 is fixedly connected to the magnetic plate 4, and the other end of the return spring 401 is fixedly connected to the clamping frame 3.

[0024] A guide post 402 is fixedly connected to the magnetic plate 4, and a guide hole 403 matching the guide post 402 is provided on the clamping frame 3. The guide post 402 and the guide hole 403 can guide the sliding of the magnetic plate 4 and prevent the magnetic plate 4 from being misaligned when clamping the electrode film 103 with the clamping frame 3.

[0025] The magnetic plate 4 and the clamping frame 3 are provided with rubber anti-slip pads at the ends that are in contact with the electrode film 103, which can improve the stability of clamping and prevent damage to the electrode film 103.

[0026] It also includes a robotic arm. The guide frame 2 has an insertion area 5 and a retrieval area 501 at both ends for inserting and retrieving the clamping frame 3. The robotic arm is located in the insertion area 5 for placing the clamping frame 3 in the retrieval area 501 into the insertion area 5.

[0027] The guide rail opening on the side of the guide frame 2 near the placement area 5 is set at an angle, which makes it convenient for the clamping frame 3 to enter the guide frame 2 along with the electrode film 103.

[0028] When using this device, first ensure that the casting roller 1 winds the electrode film 103 to be calendered. The electrode film 103 passes around the guide roller 101 in sequence, and its free end is fixed to the winding roller 102, thus completing the film laying before calendering. The battery of the clamping part is fully charged to prepare for powering the electromagnet 301. The reset spring 401 is in a naturally extended state, and the magnetic plate 4 and the clamping frame 3 are in a separate initial position. The robotic arm is in a standby state, aligned with the take-out area 501 of the guide frame 2, ready to take out the clamping frame 3 that has completed the calendering cycle.

[0029] When the robotic arm starts, the clamping frame 3 in the take-out area 501 is taken out and transferred to the placement area 5; using the inclined guide rail opening on the side of the guide frame 2 near the placement area 5, the clamping frame 3 smoothly fits against both sides of the electrode film 103; the electromagnet 301 is energized, generating magnetic attraction and attracting the magnetic plate 4. The magnetic plate 4 moves towards the clamping frame 3 along the guiding direction of the guide post 402 and the guide hole 403, and works with the clamping frame 3 to complete the clamping of the electrode film 103; at this time, the rubber anti-slip pad is tightly attached to the electrode film 103, which not only ensures the clamping stability, but also avoids damage to the film material;

[0030] The winding roller 102 and the guide roller 101 are started and run at a preset speed difference between the speed of the winding roller 102 and the speed of the guide roller 101. The tension generated by the speed difference extends the electrode film 103 longitudinally.

[0031] As the electrode film 103 moves longitudinally, the clamping frame 3 slides along the inner guide rail of the inclined guide frame 2 under the traction of the film material. Due to the inclination angle of the guide frame 2, the clamping frame 3 generates a lateral pulling force on both sides of the electrode film 103, which drives the electrode film 103 to achieve lateral extension.

[0032] When the clamping frame 3 moves with the electrode film 103 to the removal area 501 of the guide frame 2, the electromagnet 301 is de-energized, the magnetic attraction disappears, the reset spring 401 resets and pulls the magnetic plate 4 to separate from the clamping frame 3, releasing the electrode film 103; the robotic arm repeats the removal and placement operations to achieve continuous bidirectional rolling work.

[0033] This invention utilizes the cooperation between the inclined guide frame 2 and the clamping part, along with the speed difference between the winding roller 102 and the guide roller 101, to simultaneously achieve bidirectional calendering of the electrode film 103 in both the transverse and longitudinal directions, ensuring uniformity in film thickness and density. The clamping part employs an electromagnet 301 for magnetic attraction, a guide post 402 for anti-misalignment design, and a rubber anti-slip pad to achieve reliable clamping and prevent damage to the film, thereby improving product qualification rate. The clamping part is automatically recycled and reused using a robotic arm, an insertion area 5, and an extraction area 501. Combined with the anti-jamming effect of the inclined opening of the guide frame 2, continuous operation is ensured, labor costs are reduced, and production efficiency is improved. Furthermore, the overall structure is compact and reasonable, and operation and maintenance are convenient. The clamping part and guide frame 2 can be adapted to different specifications of electrode films 103, making it widely applicable and meeting the diverse production needs of battery electrode sheets.

[0034] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in the present utility model, based on the technical solution and the inventive concept of the present utility model, should be included within the protection scope of the present utility model.

Claims

1. A bidirectional calendering roll press, characterized in that, It includes a casting roller (1), a guide roller (101), and a winding roller (102) for winding an electrode film (103) in sequence, wherein a calendering section is provided between the guide roller (101) and the winding roller (102); The calendering section includes guide frames (2) disposed on both sides of the electrode film (103). The guide frames (2) are inclined. A clamping part is slidably connected inside the guide frame (2). The clamping part is detachably connected to the electrode film (103). When the clamping part slides inside the guide frame (2), it is used to pull the electrode film (103) to both sides.

2. The bidirectional calendering roll press according to claim 1, characterized in that, The clamping part includes a clamping frame (3), which has an electromagnet (301) inside. A magnetic plate (4) is slidably connected to the clamping frame (3). When the electromagnet (301) is energized, it is magnetically attracted to the magnetic plate (4). A return spring (401) is fixedly connected to the magnetic plate (4), and the other end of the return spring (401) is fixedly connected to the clamping frame (3).

3. The bidirectional calendering roll press according to claim 2, characterized in that, The magnetic plate (4) is fixedly connected to a guide post (402), and the clamping frame (3) is provided with a guide hole (403) that matches the guide post (402).

4. The bidirectional calendering roll press according to claim 2, characterized in that, The magnetic plate (4), the clamping frame (3), and the electrode film (103) are provided with a rubber anti-slip pad at the end of the magnetic plate (4) and the clamping frame (3) that are in contact with each other.

5. The bidirectional calendering roll press according to claim 2, characterized in that, It also includes a robotic arm. The guide frame (2) has an insertion area (5) and a removal area (501) at both ends for inserting and removing the clamping frame (3). The robotic arm is located in the insertion area (5) for placing the clamping frame (3) of the removal area (501) into the insertion area (5).

6. The bidirectional calendering roll press according to claim 5, characterized in that, The guide frame (2) is set at an angle at the side rail opening near the placement area (5).

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