A double-roller pressing equipment for lithium battery production

Abstract

The present invention discloses a double-roller pressing device for lithium battery production. The present invention relates to the field of lithium battery production technology, comprising a machine base, with a lifting frame and a support frame fixedly installed on both sides of the top of the machine base; a conveying assembly, which is used for guiding and transmitting lithium battery pole pieces, and the conveying assembly is fixedly installed on the top of the lifting frame. The double-roller pressing device for lithium battery production, before the pole pieces are pressed, the staff adjusts the height of the guide roller and the support frame group so that the pole pieces are placed above the support frame group. The guide rollers and the rotating rod are set on both sides of the pole pieces when the pole pieces are conveyed, and generate friction with the surface of the pole pieces. At this time, the second motor drives the guide roller to rotate, guides and conveys the pole pieces, and pre-processes the pole pieces by the guide rollers and the rotating rods before pressing, so that the pressing position is more closely fitted, and the inclined lifting frame cleans the dust on the pole pieces by generating friction with the guide rollers and the rotating rods when the pole pieces are conveyed.

Description

Technical Field

[0001] The present invention relates to the technical field of lithium battery production, and in particular to a double-roller pressing device for producing lithium batteries. Background Art

[0002] Lithium batteries are a type of battery that uses lithium metal or lithium alloys as the positive and negative electrode materials and a non-aqueous electrolyte solution. Due to the highly reactive chemical properties of lithium metal, its processing, storage, and use place high demands on the environment. With the advancement of science and technology, lithium batteries have become mainstream.

[0003] Lithium batteries can be broadly divided into two categories: lithium metal batteries and lithium-ion batteries. Lithium-ion batteries do not contain metallic lithium and are rechargeable. The fifth generation of rechargeable batteries, lithium metal batteries, was introduced in 1996 and offer superior safety, specific capacity, self-discharge rate, and performance-price ratio to lithium-ion batteries.

[0004] In lithium battery production, the rolling process of pole pieces is crucial to battery performance. Traditional pressing equipment has many problems, such as high equipment investment and energy consumption. The produced pole pieces have poor flexibility and are prone to uneven force during the pressing process, resulting in poor thickness consistency, which affects the battery's charge and discharge performance and cycle life. Summary of the Invention

[0005] To achieve the above objectives, the present invention is implemented through the following technical solutions: A double-roller pressing device for lithium battery production, comprising: a machine base, with a lifting frame and a supporting frame fixedly installed on both sides of the top of the machine base;

[0006] A conveying assembly is used for guiding and transporting lithium battery pole pieces. The conveying assembly is fixedly mounted on the top of the lifting frame, and the conveying assembly is mounted above the machine base through the lifting frame;

[0007] A stabilizing support assembly is used for bottom protection support during the transportation of lithium battery pole pieces. The stabilizing support assembly is fixedly installed at the bottom of the conveying assembly and the top of the lifting frame;

[0008] The roller pressing assembly is rotatably mounted inside the support frame and is compatible with the stabilizing assembly. During the preparation process, the lithium battery electrode is first subjected to processes such as coating. After that, the staff places the electrode after the coating operation into the conveying assembly and places the electrode above the stabilizing assembly. The staff then activates the conveying assembly, causing it to rotate and convey the electrode toward the roller pressing assembly. During the movement, the stabilizing assembly installed below also slides and moves accordingly. The stabilizing assembly cooperates with the conveying assembly to stably convey the electrode. Before lamination, the electrode is pre-treated to prevent the electrode from shifting during transportation and affecting the lamination effect.

[0009] Preferably, the rolling assembly includes a positioning plate, and a rotating shaft is rotatably mounted between the opposite surfaces of the positioning plate. The rotating shaft is provided with two, and the surfaces of the two rotating shafts are provided with pulleys. A first motor is fixedly mounted on one side of the outer surface of the rotating shaft, and an inner roller is rotatably mounted on the outer surface of the inner roller, and a stabilizing pad group is fixedly mounted on the outer surface of the inner roller. The stabilizing pad group is provided in a plurality of groups, and the plurality of groups of stabilizing pad groups are circumferentially distributed on the surface of the inner roller, and the outer surface of the stabilizing pad group is provided with a pressing roller. The staff starts the first motor so that the output end of the first motor drives the rotating shaft to rotate. At this time, the pole piece is conveyed between the two pressing rollers through the conveying assembly and the stabilizing assembly. After the pole piece is placed between the two pressing rollers, the electric heating wire in the pressing roller heats the pressing roller. When the rotating shaft rotates, it drives the inner roller, the stabilizing pad group and the pressing roller to rotate to press the pole piece. The surface of the pressing roller is provided with a wear-resistant rubber layer and protrusions to increase the friction between the pole piece and the pressing roller, thereby improving the pressing effect. The buffering effect of the wear-resistant rubber layer can protect the pole piece from damage.

[0010] Preferably, the first motor is fixedly mounted on one side of the outer surface of the base, and the positioning plates are fixedly mounted on both sides of the outer surface of the support frame.

[0011] Preferably, the stabilizing pad assembly includes a mounting block, a gasket fixedly mounted on the outer surface of the mounting block, a positioning block fixedly mounted on the top of the gasket, and extension frames rotatably mounted on both sides of the positioning block. Two extension frames are provided, and friction pads are fixedly mounted on the surfaces of both extension frames. When rolling the pole piece, due to the uneven thickness of the pole piece surface, friction is generated between the pressing rollers on both sides and the pole piece surface during rolling. The uneven thickness position easily leads to uneven pressure on the pole piece. To avoid uneven force during the pole piece pressing process, when the pressing roller contacts the pole piece surface, the extension frame installed between the pressing roller and the inner roller rotates in the positioning block according to the change in pole piece thickness, thereby adjusting the spacing between the pressing rollers to facilitate the pressing process of pole pieces of different thicknesses.

[0012] Preferably, the mounting block is fixedly mounted on the outer surface of the inner roller, and the friction pad is frictionally fitted with the inner wall of the pressing roller.

[0013] Preferably, the conveying assembly includes a mounting frame, and there are two mounting frames, and guide rollers are threadedly installed on the tops of the two mounting frames, a second motor is fixedly installed on one side of the outer surface of the guide roller, a positioning frame is provided on the outer side of the mounting frame, and a rotating rod is rotatably installed between the opposite surfaces of the positioning frame. Before the pole piece is pressed, the staff adjusts the height of the guide roller and the supporting frame group so that the pole piece is placed above the supporting frame group. The guide rollers and the rotating rod are set on both sides of the pole piece when the pole piece is conveyed, and generate friction with the surface of the pole piece. At this time, the second motor drives the guide roller to rotate, guides and conveys the pole piece, and pre-processes the pole piece with the guide roller and the rotating rod before pressing, so that the pressing position is more fitted, and the inclined lifting frame cleans the dust on the pole piece by generating friction with the guide roller and the rotating rod when the pole piece is conveyed.

[0014] Preferably, the mounting frame and the positioning frame are both fixedly mounted on the top of the lifting frame, the guide roller is adapted to the rotating rod, and the mounting frame is fixedly mounted on both sides of the outer surface of the stabilizing support assembly.

[0015] Preferably, the stabilizing assembly includes a connecting frame, two of which are provided, and the two connecting frames are fixedly mounted on the top of the mounting frame and the lifting frame respectively, a stabilizing rod is fixedly mounted between the opposite surfaces of the connecting frames, a bearing frame group is slidably mounted on the outer surface of the stabilizing rod, and elastic rods are fixedly mounted on both sides of the outer surface of the bearing frame group, and the elastic rods are provided with two, and the surfaces of the two elastic rods are sleeved with limiting rings, the limiting rings are slidably mounted on the surfaces of the elastic rods, and the limiting rings are squeezed and adapted to the elastic rods. Before the pole piece is pressed, the pole piece first passes between the guide roller and the rotating rod, and the pole piece after passing through is placed in the upper direction of the bearing frame group. At this time, the pole piece moves toward the direction of the rolling assembly as the guide roller rotates. At this time, the bearing frame group below the pole piece slides and displaces on the elastic rod to keep the pole piece smoothly transported and avoid pole piece offset during pressing.

[0016] Preferably, the support frame group includes an inner support plate, a slide seat is slidably mounted on the top of the inner support plate, a screw rod is fixedly mounted on the side of the top of the slide seat, four screw rods are provided, and the four screw rods are symmetrically arranged with the inner support plate as the center, a friction support disk is threadedly mounted on the top of each screw rod, a connecting rod is fixedly mounted on the outer surface of the slide seat, and a connecting plate is fixedly mounted on the outer surface of the connecting rod. When the guide roller rotates to drive the pole piece to move, the pole piece is placed above the friction support disk, so that the slide seat below the friction support disk slides on the inner support plate. Since the lifting frame is a tilting device, in order to prevent the pole piece from sliding and falling during transportation, the friction support disk installed on the slide seat increases the friction between the pole piece and the pole piece while supporting the pole piece, thereby preventing the pole piece from slipping during transportation.

[0017] Preferably, the inner support plate is fixedly mounted between opposite surfaces of the lifting frame, and the connecting plate is slidably mounted on the surfaces of the stabilizing rod and the elastic rod.

[0018] The present invention provides a double-roller pressing device for lithium battery production. It has the following beneficial effects:

[0019] 1. The double-roller pressing equipment used in the production of lithium batteries, before pressing the electrode, the staff adjusts the height of the guide roller and the carrier group so that the electrode is placed above the carrier group. The guide rollers and rotating rods are set on both sides of the electrode when the electrode is conveyed, and generate friction with the surface of the electrode. At this time, the second motor drives the guide roller to rotate, guides and conveys the electrode, and pre-processes the electrode by the guide roller and the rotating rod before pressing, so that the pressing position is more closely fitted, and the inclined lifting frame cleans the dust on the electrode through the friction between the guide roller, the rotating rod and the electrode when the electrode is conveyed.

[0020] 2. The double-roller pressing equipment for the production of lithium batteries requires the pole piece to pass between the guide roller and the rotating rod before pressing. After passing through, the pole piece is placed on the upper side of the supporting frame group. At this time, the pole piece moves toward the direction of the rolling assembly as the guide roller rotates. At this time, the supporting frame group under the pole piece slides on the elastic rod to keep the pole piece transported smoothly and avoid pole piece displacement during pressing.

[0021] 3. The double-roller pressing equipment for lithium battery production drives the displacement of the pole piece by rotating the guide roller. The pole piece is placed on top of the friction support plate, so that the slide below the friction support plate slides on the inner support plate. Since the lifting frame is an inclined device, in order to prevent the pole piece from sliding and falling during transportation, the friction support plate installed on the slide increases the friction between the pole piece and the pole piece while supporting the pole piece, thereby preventing the pole piece from slipping during transportation.

[0022] 4. The double-roller pressing equipment for the production of lithium batteries starts the first motor through the staff so that the output end of the first motor drives the rotating shaft to rotate. At this time, the pole piece is conveyed between the two pressing rollers through the conveying assembly and the stabilizing assembly. After the pole piece is placed between the two pressing rollers, the electric heating wire in the pressing roller heats the pressing roller. When the rotating shaft rotates, it drives the inner roller, the stabilizing pad group and the pressing roller to rotate and press the pole piece. The surface of the pressing roller is provided with a wear-resistant rubber layer and protrusions to increase the friction between the pole piece and the pressing effect, and the cushioning effect of the wear-resistant rubber layer can protect the pole piece from damage.

[0023] 5. The double-roller pressing equipment used in the production of lithium batteries, when rolling the pole piece, due to the uneven thickness of the pole piece surface, friction occurs between the pressing rollers on both sides and the pole piece surface during rolling. The uneven thickness position easily leads to uneven pressure on the pole piece. In order to avoid uneven force during the pole piece pressing process, when the pressing roller contacts the pole piece surface, the extension frame installed between the pressing roller and the inner roller rotates in the positioning block according to the change in pole piece thickness, thereby adjusting the distance between the pressing rollers to facilitate the pressing of pole pieces of different thicknesses. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 This is a schematic diagram of the external structure of a double-roller pressing device for producing lithium batteries according to the present invention;

[0025] Figure 2 This is a schematic diagram of the external structure of a double-roller pressing device for producing lithium batteries according to the present invention from another angle;

[0026] Figure 3 This is a schematic diagram of the connection structure between the rolling assembly and the support frame of the present invention;

[0027] Figure 4 It is a structural schematic diagram of the rolling assembly of the present invention;

[0028] Figure 5 It is an enlarged structural diagram of the stabilizing pad assembly of the present invention;

[0029] Figure 6 Schematic diagram of the top view of the conveying assembly and the stabilizing assembly of the present invention;

[0030] Figure 7 It is a structural schematic diagram of the conveying assembly of the present invention;

[0031] Figure 8 This is a schematic diagram of the connection structure between the conveying assembly and the stabilizing assembly of the present invention;

[0032] Figure 9 Schematic diagram of the structure of the carrier assembly of the present invention.

[0033] In the figure: 1. Lifting frame; 2. Machine base; 3. Support frame; 4. Rolling assembly; 41. Positioning plate; 42. Pressing roller; 43. First motor; 44. Stabilizing pad group; 441. Friction pad; 442. Extension frame; 443. Positioning block; 444. Gasket; 445. Mounting block; 45. Rotating shaft; 46. Inner roller; 47. Pulley; 5. Conveying assembly; 51. Guide roller; 52. Second motor; 53. Rotating rod; 54. Positioning frame; 55. Mounting frame; 6. Stabilizing assembly; 61. Spring rod; 62. Connecting frame; 63. Limiting ring belt; 64. Stabilizing rod; 65. Carrying frame group; 651. Inner support plate; 652. Slide; 653. Screw; 654. Friction support disc; 655. Connecting rod; 656. Connecting plate. DETAILED DESCRIPTION

[0034] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0035] The first embodiment, as Figures 1 to 9 As shown, the present invention provides a technical solution: a double-roller pressing device for lithium battery production, comprising: a machine base 2, with a lifting frame 1 and a supporting frame 3 fixedly mounted on both sides of the top of the machine base 2;

[0036] The conveying assembly 5 is used for guiding and transporting the lithium battery pole pieces. The conveying assembly 5 is fixedly mounted on the top of the lifting frame 1. The conveying assembly 5 is erected above the machine base 2 through the lifting frame 1;

[0037] The conveying assembly 5 includes a mounting frame 55, which is provided with two. The top of the two mounting frames 55 is threadedly installed with a guide roller 51. A second motor 52 is fixedly installed on one side of the outer surface of the guide roller 51. A positioning frame 54 is provided on the outer side of the mounting frame 55. A rotating rod 53 is rotatably installed between the opposite surfaces of the positioning frame 54. Before the electrode is pressed, the staff adjusts the height of the guide roller 51 and the supporting frame group 65 so that the electrode is placed above the supporting frame group 65. The guide roller 51 and the rotating rod 53 are set on both sides of the electrode when the electrode is conveyed and generate friction with the surface of the electrode. At this time, the second motor 52 drives the guide roller 51 to rotate, guides and conveys the electrode, and pre-processes the electrode by the guide roller 51 and the rotating rod 53 before pressing, so that the pressing position is more closely fitted. In addition, the inclined lifting frame 1 cleans the dust on the electrode by generating friction between the guide roller 51 and the rotating rod 53 and the electrode when the electrode is conveyed.

[0038] The mounting frame 55 and the positioning frame 54 are both fixedly mounted on the top of the lifting frame 1 , the guide roller 51 is adapted to the rotating rod 53 , and the mounting frame 55 is fixedly mounted on both sides of the outer surface of the stabilizing assembly 6 .

[0039] The stabilizing support assembly 6 is used for bottom protection support during the transportation of lithium battery pole pieces. The stabilizing support assembly 6 is fixedly mounted on the bottom of the conveying assembly 5 and the stabilizing support assembly 6 is fixedly mounted on the top of the lifting frame 1;

[0040] The stabilizing assembly 6 includes a connecting frame 62, of which two are provided. The two connecting frames 62 are fixedly mounted on the top of the mounting frame 55 and the lifting frame 1, respectively. A stabilizing rod 64 is fixedly mounted between the opposite surfaces of the connecting frames 62. A supporting frame group 65 is slidably mounted on the outer surface of the stabilizing rod 64. On both sides of the outer surface of the supporting frame group 65, elastic rods 61 are fixedly mounted. There are two elastic rods 61. The surfaces of the two elastic rods 61 are covered with limiting rings 63. The limiting rings 63 are slidably mounted on the surfaces of the elastic rods 61 and are squeezed and adapted to the elastic rods 61. Before the pole piece is pressed together, the pole piece first passes between the guide roller 51 and the rotating rod 53. After passing through, the pole piece is placed in the upper direction of the supporting frame group 65. At this time, the pole piece moves toward the rolling assembly 4 as the guide roller 51 rotates. At this time, the supporting frame group 65 below the pole piece slides and moves on the elastic rod 61 to ensure smooth transportation of the pole piece and prevent the pole piece from shifting during pressing.

[0041] The rolling assembly 4 is rotatably mounted inside the support frame 3 and is adapted to the stabilizing assembly 6. During the preparation process, the pole pieces of the lithium battery first undergo coating and other processes. Then, the staff puts the pole pieces after the coating operation into the conveying assembly 5 and places the pole pieces on top of the stabilizing assembly 6. The staff then starts the conveying assembly 5, causing the conveying assembly 5 to rotate and convey the pole pieces to the side of the rolling assembly 4. During the movement, the stabilizing assembly 6 provided below also slides and moves accordingly. The stabilizing assembly 6 cooperates with the conveying assembly 5 to stably convey the pole pieces. The pole pieces are pre-treated before lamination to avoid displacement of the pole pieces during transportation, which would affect the lamination effect.

[0042] The rolling assembly 4 includes a positioning plate 41, and a rotating shaft 45 is rotatably installed between the opposite surfaces of the positioning plate 41. There are two rotating shafts 45, and the surfaces of the two rotating shafts 45 are sleeved with pulleys 47. A first motor 43 is fixedly installed on one side of the outer surface of the rotating shaft 45. An inner roller 46 is rotatably installed on the outer surface of the rotating shaft 45, and a stabilizing pad group 44 is fixedly installed on the outer surface of the inner roller 46. There are several groups of the stabilizing pad group 44, and the several groups of the stabilizing pad groups 44 are distributed in a circular shape on the surface of the inner roller 46. The outer surface of the stabilizing pad group 44 is sleeved with a pressing roller 42. The staff starts the first motor 43 so that the output end of the first motor 43 drives the rotating shaft 45 to rotate. At this time, the electrode is transported between the two pressing rollers 42 through the conveying component 5 and the stabilizing component 6. After the electrode is placed between the two pressing rollers 42, the electric heating wire in the pressing roller 42 heats the pressing roller 42. When the rotating shaft 45 rotates, it drives the inner roller 46, the stabilizing pad group 44 and the pressing roller 42 to rotate to press the electrode. The surface of the pressing roller 42 is provided with a wear-resistant rubber layer and protrusions, which increase the friction between the electrode and the electrode, thereby improving the pressing effect, and the buffering effect of the wear-resistant rubber layer can protect the electrode from damage.

[0043] The first motor 43 is fixedly mounted on one side of the outer surface of the base 2 , and the positioning plates 41 are fixedly mounted on both sides of the outer surface of the support frame 3 .

[0044] The second embodiment, based on the first embodiment, see Figures 4 and 5 As shown, a gasket 444 is installed, and a positioning block 443 is fixedly installed on the top of the gasket 444. Extension frames 442 are rotatably installed on both sides of the positioning block 443. There are two extension frames 442, and friction pads 441 are fixedly installed on the surface of the two extension frames 442. When rolling the pole piece, due to the uneven thickness of the pole piece surface, friction is generated between the pressing rollers 42 on both sides and the pole piece surface during rolling. The uneven thickness position easily leads to uneven pressure on the pole piece. In order to avoid uneven force during the pole piece pressing process, when the pressing roller 42 contacts the pole piece surface, the extension frame 442 installed between the pressing roller 42 and the inner roller 46 rotates in the positioning block 443 according to the change in pole piece thickness, thereby adjusting the distance between the pressing rollers 42 to facilitate the pressing process of pole pieces of different thicknesses.

[0045] The mounting block 445 is fixedly mounted on the outer surface of the inner roller 46 , and the friction pad 441 is frictionally fitted with the inner wall of the pressing roller 42 .

[0046] The third embodiment, based on the first and second embodiments, see Figures 8 and 9As shown, the support frame assembly 65 includes an inner support plate 651, a slide 652 is slidably mounted on the top of the inner support plate 651, and a screw 653 is fixedly mounted on the side of the top of the slide 652. There are four screws 653, which are symmetrically arranged around the inner support plate 651. The top of each screw 653 is threadedly mounted with a friction support disk 654. A connecting rod 655 is fixedly mounted on the outer surface of the slide 652, and a connecting plate 656 is fixedly mounted on the outer surface of the connecting rod 655. When the guide roller 51 rotates to drive the pole piece to move, the pole piece is placed above the friction support disk 654, so that the slide 652 below the friction support disk 654 slides on the inner support plate 651. Since the lifting frame 1 is a tilting device, in order to prevent the pole piece from sliding and falling during transportation, the friction support disk 654 mounted on the slide 652 supports the pole piece while increasing the friction between the pole piece and the pole piece, thereby preventing the pole piece from sliding during transportation.

[0047] The inner support plate 651 is fixedly installed between the opposite surfaces of the lifting frame 1, and the connecting plate 656 is slidably installed on the surfaces of the stabilizing rod 64 and the elastic rod 61.

[0048] During use, the electrode of the lithium battery is first subjected to coating and other processes during the preparation process. Then the staff puts the electrode after the coating operation into the conveying component 5 and places the electrode above the stabilizing component 6. Then the staff starts the conveying component 5, so that the conveying component 5 rotates to convey the electrode to the side of the rolling component 4. During the movement, the stabilizing component 6 set down also slides and moves accordingly. The electrode is stably conveyed through the cooperation of the stabilizing component 6 and the conveying component 5, and the electrode is pre-treated before pressing to avoid the electrode from being offset during the conveying process, which affects the pressing effect.

[0049] Before the electrode is pressed, the staff adjusts the height of the guide roller 51 and the supporting frame group 65 so that the electrode is placed above the supporting frame group 65. The guide roller 51 and the rotating rod 53 are set on both sides of the electrode when the electrode is conveyed, and generate friction with the surface of the electrode. At this time, the second motor 52 drives the guide roller 51 to rotate, guides and conveys the electrode, and pre-processes the electrode by the guide roller 51 and the rotating rod 53 before pressing, so that the pressing position is more fitted, and the inclined lifting frame 1 cleans the dust on the electrode through the friction between the guide roller 51 and the rotating rod 53 and the electrode when the electrode is conveyed.

[0050] Before the pole piece is pressed, the pole piece first passes between the guide roller 51 and the rotating rod 53. After passing through, the pole piece is placed in the upper direction of the supporting frame group 65. At this time, the pole piece moves toward the rolling assembly 4 as the guide roller 51 rotates. At this time, the supporting frame group 65 under the pole piece slides on the elastic rod 61 to keep the pole piece smoothly transported and avoid pole piece displacement during pressing.

[0051] When the guide roller 51 rotates to drive the pole piece to move, the pole piece is placed above the friction support plate 654, so that the slide 652 below the friction support plate 654 slides on the inner support plate 651. Since the lifting frame 1 is an inclined device, in order to prevent the pole piece from sliding and falling during transportation, the friction support plate 654 installed on the slide 652 increases the friction between the pole piece and the pole piece while supporting the pole piece, thereby preventing the pole piece from slipping during transportation.

[0052] The staff starts the first motor 43 so that the output end of the first motor 43 drives the rotating shaft 45 to rotate. At this time, the electrode is transported between the two pressing rollers 42 through the conveying component 5 and the stabilizing component 6. After the electrode is placed between the two pressing rollers 42, the electric heating wire in the pressing roller 42 heats the pressing roller 42. When the rotating shaft 45 rotates, it drives the inner roller 46, the stabilizing pad group 44 and the pressing roller 42 to rotate to press the electrode. The surface of the pressing roller 42 is provided with a wear-resistant rubber layer and protrusions, which increase the friction between the electrode and the electrode, thereby improving the pressing effect, and the buffering effect of the wear-resistant rubber layer can protect the electrode from damage.

[0053] When the pole piece is rolled, due to the uneven thickness of the pole piece surface, the pressing rollers 42 on both sides produce friction with the pole piece surface during rolling. The uneven thickness position can easily lead to uneven pressure on the pole piece. In order to avoid uneven force during the pole piece pressing process, when the pressing roller 42 contacts the pole piece surface, the extension frame 442 installed between the pressing roller 42 and the inner roller 46 rotates in the positioning block 443 according to the change in the pole piece thickness, thereby adjusting the distance between the pressing rollers 42 to facilitate the pressing process of pole pieces with different thicknesses.

[0054] It should be noted that, in this document, relational terms such as first and second, etc., are used only to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the terms "comprises," "comprising," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or device comprising a series of elements includes not only those elements, but also other elements not explicitly listed, or elements inherent to such process, method, article, or device. In the absence of further limitations, an element defined by the phrase "comprising a..." does not exclude the presence of additional identical elements in the process, method, article, or device comprising the element.

[0055] While embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions, and variations may be made to these embodiments without departing from the principles and spirit of the invention, and that the scope of the invention is defined by the appended claims and their equivalents.

Claims

1. A double-roller pressing device for lithium battery production, characterized in that: include: A machine base (2), wherein a lifting frame (1) and a supporting frame (3) are fixedly mounted on both sides of the top of the machine base (2); A conveying assembly (5), the conveying assembly (5) is used for guiding and transmitting lithium battery pole pieces, the conveying assembly (5) is fixedly mounted on the top of the lifting frame (1), and the conveying assembly (5) is erected above the machine base (2) through the lifting frame (1); A stabilizing support assembly (6), the stabilizing support assembly (6) is used for bottom protection support during the transportation of lithium battery pole pieces, the stabilizing support assembly (6) is fixedly mounted on the bottom of the conveying assembly (5), and the stabilizing support assembly (6) is fixedly mounted on the top of the lifting frame (1); A rolling assembly (4), the rolling assembly (4) being rotatably mounted inside the support frame (3), the rolling assembly (4) being adapted to the stabilizing assembly (6); The rolling assembly (4) includes a positioning plate (41), a rotating shaft (45) is rotatably mounted between opposite surfaces of the positioning plate (41), two rotating shafts (45) are provided, and the surfaces of the two rotating shafts (45) are sleeved with pulleys (47), a first motor (43) is fixedly mounted on one side of the outer surface of the rotating shaft (45), an inner roller (46) is rotatably mounted on the outer surface of the rotating shaft (45), a stabilizing pad group (44) is fixedly mounted on the outer surface of the inner roller (46), and a plurality of groups of the stabilizing pad groups (44) are provided, and the plurality of groups of the stabilizing pad groups (44) are circumferentially distributed on the surface of the inner roller (46), and a pressing roller (42) is sleeved on the outer surface of the stabilizing pad group (44); The first motor (43) is fixedly mounted on one side of the outer surface of the machine base (2), and the positioning plates (41) are fixedly mounted on both sides of the outer surface of the support frame (3); The stabilizing pad group (44) includes a mounting block (445), a gasket (444) is fixedly mounted on the outer surface of the mounting block (445), a positioning block (443) is fixedly mounted on the top of the gasket (444), and extension frames (442) are rotatably mounted on both sides of the interior of the positioning block (443), two extension frames (442) are provided, and friction pads (441) are fixedly mounted on the surfaces of the two extension frames (442); The mounting block (445) is fixedly mounted on the outer surface of the inner roller (46), and the friction pad (441) is frictionally adapted to the inner wall of the pressing roller (42).

2. The double-roll pressing device for lithium battery production according to claim 1, characterized in that: The conveying assembly (5) includes a mounting frame (55), two of which are provided. Guide rollers (51) are threadedly installed on the tops of the two mounting frames (55), a second motor (52) is fixedly installed on one side of the outer surface of the guide roller (51), a positioning frame (54) is provided on the outer side of the mounting frame (55), and a rotating rod (53) is rotatably installed between the opposite surfaces of the positioning frame (54).

3. The double-roller pressing device for lithium battery production according to claim 2, characterized in that: The mounting frame (55) and the positioning frame (54) are both fixedly mounted on the top of the lifting frame (1), the guide roller (51) is adapted to the rotating rod (53), and the mounting frame (55) is fixedly mounted on both sides of the outer surface of the stabilizing support assembly (6).

4. The double-roller pressing device for lithium battery production according to claim 1, characterized in that: The stabilizing assembly (6) includes a connecting frame (62), and there are two connecting frames (62). The two connecting frames (62) are fixedly mounted on the top of the mounting frame (55) and the lifting frame (1), respectively. A stabilizing rod (64) is fixedly mounted between the opposite surfaces of the connecting frame (62). A supporting frame group (65) is slidably mounted on the outer surface of the stabilizing rod (64). Both sides of the outer surface of the supporting frame group (65) are fixedly mounted with a spring rod (61). There are two spring rods (61). The surfaces of the two spring rods (61) are provided with a limiting ring belt (63). The limiting ring belt (63) is slidably mounted on the surface of the spring rod (61). The limiting ring belt (63) is squeezed and adapted to the spring rod (61).

5. The double-roller pressing device for lithium battery production according to claim 4, characterized in that: The support frame group (65) includes an inner support plate (651), a slide seat (652) is slidably mounted on the top of the inner support plate (651), a screw rod (653) is fixedly mounted on the side of the top of the slide seat (652), four screw rods (653) are provided, and the four screw rods (653) are symmetrically arranged with the inner support plate (651) as the center, and a friction support disk (654) is threadedly mounted on the top of each screw rod (653), a connecting rod (655) is fixedly mounted on the outer surface of the slide seat (652), and a connecting plate (656) is fixedly mounted on the outer surface of the connecting rod (655).

6. The double-roller pressing device for lithium battery production according to claim 5, characterized in that: The inner support plate (651) is fixedly mounted between opposite surfaces of the lifting frame (1), and the connecting plate (656) is slidably mounted on the surfaces of the stabilizing rod (64) and the elastic rod (61).

Images