Anti-deformation cold pressing device for lithium battery production

Abstract

The anti-deformation cold pressing device comprises a U-shaped first mounting frame, a fixed heating roller, an upper pressing roller and a lower pressing roller are rotationally connected in the first mounting frame, second sliding grooves penetrating through the first mounting frame are formed in the two sides of the first mounting frame, and the first mounting frame is provided with a plurality of second sliding grooves penetrating through the second mounting frame. A U-shaped supporting frame is fixedly connected to the upper end of the first mounting frame, a lifting mechanism is arranged above the first mounting frame, a movable heating roller is arranged over a fixed heating roller, a spring is fixedly connected to the top of a second sliding groove, and a motor is fixedly connected to one side of the first mounting frame; and two transmission gears which are meshed with each other are arranged on one side, far away from the motor, of the first mounting frame. The upper pressing roller and the lower pressing roller are matched to conduct cold pressing processing on the lithium battery pole piece, the fixed heating roller and the movable heating roller heat the pole piece before the pole piece is processed, the elasticity of the pole piece is reduced, and deformation caused by elasticity recovery after cold pressing of the pole piece is avoided.

Description

Technical Field

[0001] The utility model relates to the technical field of lithium battery production equipment, in particular to an anti-deformation cold pressing device for lithium battery production. Background Technique

[0002] A lithium battery is a type of battery with lithium metal or lithium alloy as the positive / negative electrode material and using a non-aqueous electrolyte solution. With the rapid development of new energy vehicles, lithium batteries have become the main power source for new energy vehicles due to their advantages such as high specific energy, long cycle life, and no pollution.

[0003] Currently, when cold pressing the metal pole piece of a lithium battery, a two-roll rolling mill is usually used to roll the pole piece. Since metal has elasticity, the lithium battery pole piece will experience elastic recovery after rolling, which will not only cause the thickness of the rolled pole piece to fail to meet the standard, but also cause the rolled pole piece to deform. When the lithium metal or lithium alloy plate is rolled, it is manually guided into the cold press. If the angle of the lithium metal or lithium alloy plate entering the cold press is inclined, it will increase the contact area between the lithium metal or lithium alloy plate and the pressure roller in the cold press, resulting in deformation of the rolled pole piece, and it needs to be cut to meet the use standard. Content of the Utility Model

[0004] The purpose of the utility model is to provide an anti-deformation cold pressing device for lithium battery production, which can heat the lithium metal or lithium alloy plate before rolling, reduce the elasticity of the metal, avoid the thickness of the rolled pole piece increasing due to elastic recovery, and limit the lithium metal or lithium alloy plate entering the cold press to prevent the lithium metal or lithium alloy plate from tilting, increasing the contact area between the lithium metal or lithium alloy plate and the pressure roller in the cold press, and resulting in deformation of the rolled pole piece.

[0005] To achieve the above object, a cold pressing device for preventing deformation in lithium battery production is provided, including a U-shaped first mounting frame. A fixed heating roller, an upper pressing roller and a lower pressing roller are respectively rotatably connected in the first mounting frame. The upper pressing roller is arranged directly above the lower pressing roller. Second chutes penetrating the first mounting frame are provided on both sides of the first mounting frame, and the second chutes are located above the fixed heating roller. A U-shaped support frame is fixedly connected to the upper end of the first mounting frame. A lifting mechanism is arranged above the first mounting frame, and the lifting mechanism passes through the first mounting frame and extends into the second chutes. A moving heating roller is arranged directly above the fixed heating roller, and the two ends of the rotating shaft of the moving heating roller penetrate the lifting mechanism located in the chutes. A spring is fixedly connected to the top of the second chute, and the lifting mechanism passes through the middle of the spring. The lifting mechanism is used to drive the moving heating roller to rise. A motor is fixedly connected to one side of the first mounting frame, and the output end of the motor is fixedly connected to the rotating shaft of the lower pressing roller. Two mutually meshing transmission gears are arranged on the side of the first mounting frame away from the motor, and the rotating shafts of the lower pressing roller and the upper pressing roller are respectively fixedly connected to the middle parts of the two transmission gears. A limiting mechanism communicated with the first mounting frame is fixedly connected to one end of the first mounting frame, and the limiting mechanism is used to limit the two sides of the workpiece before rolling. It can heat the lithium metal or lithium alloy plate before rolling, reduce the elasticity of the metal, and avoid the increase in the thickness of the rolled electrode due to elastic recovery. And it limits the lithium metal or lithium alloy plate entering the cold press, avoiding the inclination of the lithium metal or lithium alloy plate, increasing the contact area between the lithium metal or lithium alloy plate and the pressing roller in the cold press, and causing deformation of the rolled electrode.

[0006] According to the cold pressing device for preventing deformation in lithium battery production, a controller is fixedly connected to the side of the limiting mechanism away from the first mounting frame. A display panel and control buttons are installed on the surface of the controller. The controller controls the operation of the motor, the fixed heating roller, the moving heating roller and the lifting cylinder.

[0007] According to the cold pressing device for preventing deformation in lithium battery production, a lifting cylinder is fixedly connected to the middle part of the upper end of the support frame, and the piston rod of the lifting cylinder penetrates downward through the support frame and is slidably connected to the support frame. The lower end of the piston rod of the lifting cylinder is fixedly connected to the middle part of the lifting mechanism. The lifting cylinder is used to increase the height of the lifting mechanism, so that the upper pressing roller leaves the surface of the lower pressing roller, facilitating the passage of the lithium metal or lithium alloy plate to be rolled between the lower pressing roller and the upper pressing roller.

[0008] According to the anti-deformation cold pressing device for lithium battery production described above, the lifting mechanism is composed of a connecting plate, a slider and a second telescopic rod. The connecting plate is arranged above the first mounting frame, and the lower end of the piston rod of the lifting cylinder is fixedly connected to the connecting plate. There are two second telescopic rods which are symmetrically and fixedly connected to the lower end of the connecting plate, and the second telescopic rods penetrate downward through the first mounting frame and extend into the second chute. The second telescopic rods pass through the middle of the springs, and the second telescopic rods are slidably connected to the first mounting frame. The slider is arranged in the second chute and is slidably connected to the second chute, and the lower end of the second telescopic rod is fixedly connected to the middle of the upper end of the slider. The lower end of the spring is fixedly connected to the upper end of the slider. The two ends of the rotating shaft of the moving heating roller respectively penetrate through the slider and are rotatably connected to the slider. The lifting mechanism is connected to the moving heating roller through the slider. The lifting cylinder drives the slider to rise through the connecting plate and the second telescopic rod. The elastic force of the spring makes the lifting mechanism push the slider downward after resetting, so that the bottom of the moving heating roller is in close contact with the upper surface of the lithium metal or lithium alloy plate.

[0009] According to the anti-deformation cold pressing device for lithium battery production described above, the limiting mechanism is composed of a limiting frame, a bidirectional lead screw, a support block, a second mounting frame, a fixing plate, a first telescopic rod and a limiting roller. The limiting frame is a U-shaped structure fixedly connected to one end of the first mounting frame. The bottom of the limiting frame is provided with a first chute. Chambers are provided on both sides of the inner wall of the limiting frame. The first telescopic rods are respectively fixedly connected to the opposite sides of the two chambers. The second mounting frame is fixedly connected to the other end of the first telescopic rod, and the second mounting frame is slidably connected to the side wall of the chamber. The limiting roller is vertically installed in the second mounting frame. The support block is fixedly connected to the lower end of the second mounting frame, and the lower end of the support block penetrates through the first chute. The fixing plates are respectively fixedly connected to both sides of the bottom of the limiting frame. The bidirectional lead screw is arranged between the two fixing plates, and the bidirectional lead screw penetrates through the middle of the two fixing plates and is rotatably connected to the fixing plates. The bidirectional lead screw penetrates through the middle of the support block and is in threaded cooperation with the support block, and the support blocks are respectively located on the two threaded directions of the bidirectional lead screw. A hand wheel is fixedly connected to one end of the bidirectional lead screw. The hand wheel drives the bidirectional lead screw to rotate, so that the two support blocks drive the limiting rollers in the two second mounting frames to move towards each other, limit the two sides of the lithium metal or lithium alloy plate before roll pressing, make the lithium metal or lithium alloy plate located in the middle of the pressing roller, and the first telescopic rod limits the moving distance of the second mounting frame.

[0010] According to the anti-deformation cold pressing device for lithium battery production described above, guide grooves are symmetrically provided on both sides of the inner wall of the first chute, and the support block extends into the guide grooves and is slidably connected to the guide grooves. The cooperation between the guide grooves and the support block improves the stability of the support block moving in the first chute.

[0011] According to the anti-deformation cold pressing device for lithium battery production described above, there are two first telescopic rods in the chamber. The two first telescopic rods improve the limiting strength for the second mounting frame.

[0012] According to the anti-deformation cold pressing device for lithium battery production described above, both the moving heating roller and the fixed heating roller are electromagnetic heating rollers, and the inside of both the moving heating roller and the fixed heating roller consists of a metal roller body, a support shaft, an induction coil, and a temperature sensor. The moving heating roller and the fixed heating roller of the electromagnetic heating roller prevent internal medium leakage from polluting the electrode plate and precisely adjust the heating temperature of the electrode plate.

[0013] The beneficial effects of the above solution are:

[0014] 1. Through the cooperation of the upper pressing roller and the lower pressing roller, cold pressing is performed on the lithium metal or lithium alloy plate. Before the electrode plate is processed, the fixed heating roller and the moving heating roller heat it to reduce the elasticity of the electrode plate and avoid deformation caused by elastic recovery after cold pressing of the electrode plate.

[0015] 2. The handwheel drives the bidirectional lead screw to rotate, causing the two support blocks to slide along the thread grooves of the bidirectional lead screw, so that the limiting rollers in the two second mounting frames move towards each other to limit the two sides of the lithium metal or lithium alloy plate before roller pressing, keeping the lithium metal or lithium alloy plate in the middle of the pressing roller.

[0016] Additional aspects and advantages of the present utility model will be given in part in the following description, will become apparent in part from the following description, or will be understood through the practice of the present utility model. Description of the Drawings

[0017] The following further describes the present utility model in conjunction with the drawings and embodiments;

[0018] Figure 1 is a perspective view of the first perspective of an anti-deformation cold pressing device for lithium battery production according to the present utility model;

[0019] Figure 2 is a perspective view of the second perspective of an anti-deformation cold pressing device for lithium battery production according to the present utility model;

[0020] Figure 3 is a cross-sectional view of the limiting mechanism of an anti-deformation cold pressing device for lithium battery production according to the present utility model;

[0021] Figure 4 is a perspective view of the limiting mechanism of an anti-deformation cold pressing device for lithium battery production according to the present utility model;

[0022] Figure 5 is Figure 2 the enlarged view of part A in

[0023] Figure 6 is a perspective view of the lifting mechanism of an anti-deformation cold pressing device for lithium battery production according to the present utility model.

[0024] Legend Explanation:

[0025] 1. Limiting mechanism; 2. Fixed heating roller; 3. Movable heating roller; 4. Controller; 5. Motor; 6. Support frame; 7. First mounting frame; 8. Lifting mechanism; 9. Lifting cylinder; 10. Upper pressure roller; 11. Lower pressure roller; 12. Transmission gear; 13. Limiting frame; 14. Chamber; 15. Handwheel; 16. Bidirectional lead screw; 17. Support block; 18. Guide groove; 19. Second mounting frame; 20. Fixed plate; 21. First telescopic rod; 22. Limiting roller; 23. First chute; 24. Spring; 25. Second chute; 26. Connecting plate; 27. Slide block; 28. Second telescopic rod. Detailed implementation manners

[0026] This part will describe in detail the specific embodiments of the present invention. The preferred embodiments of the present invention are shown in the drawings. The function of the drawings is to supplement the description of the text part of the specification, enabling people to intuitively and vividly understand each technical feature and the overall technical solution of the present invention, but it cannot be construed as a limitation on the protection scope of the present invention.

[0027] Referring to Figures 1-6 , an anti-deformation cold pressing device for lithium battery production according to an embodiment of the present invention includes a U-shaped first mounting frame 7. A fixed heating roller 2, an upper pressure roller 10 and a lower pressure roller 11 are respectively rotatably connected in the first mounting frame 7. The upper pressure roller 10 is arranged directly above the lower pressure roller 11. Second chutes 25 penetrating the first mounting frame 7 are provided on both sides of the first mounting frame 7, and the second chutes 25 are located above the fixed heating roller 2. A U-shaped support frame 6 is fixedly connected to the upper end of the first mounting frame 7. A lifting mechanism 8 is arranged above the first mounting frame 7, and the lifting mechanism 8 passes through the first mounting frame 7 and extends into the second chutes 25. A movable heating roller 3 is arranged directly above the fixed heating roller 2. The two ends of the rotating shaft of the movable heating roller 3 penetrate the lifting mechanism 8 located in the chutes. A spring 24 is fixedly connected to the top of the second chute 25, and the lifting mechanism 8 passes through the middle of the spring 24. The lifting mechanism 8 is used to drive the movable heating roller 3 to rise. A motor 5 is fixedly connected to one side of the first mounting frame 7, and the output end of the motor 5 is fixedly connected to the rotating shaft of the lower pressure roller 11. Two mutually meshing transmission gears 12 are arranged on the side of the first mounting frame 7 away from the motor 5, and the rotating shafts of the lower pressure roller 11 and the upper pressure roller 10 are respectively fixedly connected to the middle parts of the two transmission gears 12. A limiting mechanism 1 communicated with the first mounting frame 7 is fixedly connected to one end of the first mounting frame 7, and the limiting mechanism 1 is used to limit the two sides of the workpiece before rolling.

[0028] A controller 4 is fixedly connected to the side of the limiting mechanism 1 away from the first mounting frame 7. A display panel and control buttons are installed on the surface of the controller 4. The controller 4 controls the operation of the motor 5, the fixed heating roller 2, the movable heating roller 3 and the lifting cylinder 9.

[0029] The middle part of the upper end of the support frame 6 is fixedly connected with a lifting cylinder 9, and the piston rod of the lifting cylinder 9 penetrates downward through the support frame 6 and is slidably connected with the support frame 6. The lower end of the piston rod of the lifting cylinder 9 is fixedly connected with the middle part of the lifting mechanism 8. The lifting cylinder 9 is used to increase the height of the lifting mechanism 8, so that the upper pressing roller 10 leaves the surface of the lower pressing roller 11, facilitating the passage of the lithium metal or lithium alloy plate to be roll-pressed between the lower pressing roller 11 and the upper pressing roller 10.

[0030] The lifting mechanism 8 is composed of a connecting plate 26, a slider 27 and a second telescopic rod 28. The connecting plate 26 is arranged above the first mounting frame 7, and the lower end of the piston rod of the lifting cylinder 9 is fixedly connected with the connecting plate 26. There are two second telescopic rods 28 which are symmetrically and fixedly connected to the lower end of the connecting plate 26, and the second telescopic rods 28 penetrate downward through the first mounting frame 7 and extend into the second chute 25. The second telescopic rods 28 pass through the middle of the spring 24, and the second telescopic rods 28 are slidably connected with the first mounting frame 7. The slider 27 is arranged in the second chute 25 and is slidably connected with the second chute 25, and the lower end of the second telescopic rod 28 is fixedly connected with the middle part of the upper end of the slider 27. The lower end of the spring 24 is fixedly connected with the upper end of the slider 27. The two ends of the rotating shaft of the movable heating roller 3 respectively penetrate through the slider 27 and are rotatably connected with the slider 27. The lifting mechanism 8 is connected with the movable heating roller 3 through the slider 27. The lifting cylinder 9 drives the slider 27 to rise through the connecting plate 26 and the second telescopic rod 28. The elastic force of the spring 24 makes the lifting mechanism 8 push the slider 27 downward after resetting, so that the bottom of the movable heating roller 3 is in close contact with the upper surface of the lithium metal or lithium alloy plate.

[0031] The limiting mechanism 1 is composed of a limiting frame 13, a bidirectional lead screw 16, a support block 17, a second mounting frame 19, a fixing plate 20, a first telescopic rod 21 and a limiting roller 22. The limiting frame 13 is of a U-shaped structure and is fixedly connected to one end of the first mounting frame 7. A first chute 23 is opened at the bottom of the limiting frame 13. Chambers 14 are opened on both sides of the inner wall of the limiting frame 13. The first telescopic rods 21 are respectively fixedly connected to the opposite sides of the two chambers 14. The second mounting frame 19 is fixedly connected to the other end of the first telescopic rod 21, and the second mounting frame 19 is slidably connected to the side wall of the chamber 14. The limiting roller 22 is vertically installed in the second mounting frame 19. The support block 17 is fixedly connected to the lower end of the second mounting frame 19, and the lower end of the support block 17 passes through the first chute 23. The fixing plates 20 are respectively fixedly connected to both sides of the bottom of the limiting frame 13. The bidirectional lead screw 16 is arranged between the two fixing plates 20, and the bidirectional lead screw 16 passes through the middle parts of the two fixing plates 20 and is rotatably connected to the fixing plates 20. The bidirectional lead screw 16 passes through the middle part of the support block 17 and is in threaded cooperation with the support block 17, and the support blocks 17 are respectively located in the two thread directions of the bidirectional lead screw 16. One end of the bidirectional lead screw 16 is fixedly connected with a hand wheel 15. The hand wheel 15 drives the bidirectional lead screw 16 to rotate, so that the two support blocks 17 drive the limiting rollers 22 in the two second mounting frames 19 to move towards each other, limit the two sides of the lithium metal or lithium alloy plate before roll pressing, and keep the lithium metal or lithium alloy plate in the middle of the pressing roller. The first telescopic rod 21 limits the moving distance of the second mounting frame 19.

[0032] Guide grooves 18 are symmetrically opened on both sides of the inner wall of the first chute 23, and the support block 17 extends into the guide grooves 18 and is slidably connected to the guide grooves 18. The cooperation between the guide grooves 18 and the support block 17 improves the stability of the support block 17 moving in the first chute 23.

[0033] There are two first telescopic rods 21 in the chamber 14, and the two first telescopic rods 21 improve the limiting strength for the second mounting frame 19.

[0034] Both the moving heating roller 3 and the fixed heating roller 2 are electromagnetic heating rollers. The moving heating roller 3 and the fixed heating roller 2 internally consist of a metal roller body, a support shaft, an induction coil and a temperature sensor. The moving heating roller 3 and the fixed heating roller 2 of the electromagnetic heating roller avoid internal medium leakage from polluting the electrode sheet and accurately adjust the heating temperature of the electrode sheet.

[0035] Working principle: During cold pressing, the lifting mechanism 8 is lifted upward by the lifting cylinder 9. The connecting plate 26 and the second telescopic rod 28 cooperate to lift the slider 27 upward, so that the moving heating roller 3 leaves the upper surface of the fixed heating roller 2. Then, one end of the lithium metal or lithium alloy plate to be processed is placed on the upper surface of the fixed heating roller 2. Then, the handwheel 15 is rotated to drive the bidirectional lead screw 16 to rotate, so that the two support blocks 17 drive the limiting rollers 22 in the two second mounting brackets 19 to move towards each other, making the lithium metal or lithium alloy plate located in the middle of the upper surface of the fixed heating roller 2. The first telescopic rod 21 limits the moving distance of the second mounting bracket 19. Then, the lifting cylinder 9 is used to reset the lifting mechanism 8. The spring 24 pushes the slider 27 and cooperates with the second telescopic rod 28 to press the upper surface of the lithium metal or lithium alloy plate by the moving heating roller 3. The moving heating roller 3 and the fixed heating roller 2 cooperate to heat the upper and lower surfaces of the lithium metal or lithium alloy plate. Subsequently, the lithium metal or lithium alloy plate enters between the upper pressing roller 10 and the lower pressing roller 11. The motor 5 drives the lower pressing roller 11 to rotate, and the two transmission gears 12 cooperate to make the upper pressing roller 10 and the lower pressing roller 11 rotate towards each other to roll press the lithium metal or lithium alloy plate.

[0036] The embodiments of the present invention have been described in detail above with reference to the accompanying drawings. However, the present invention is not limited to the above embodiments. Various changes can be made without departing from the spirit of the present invention within the scope of knowledge possessed by those of ordinary skill in the art.

Claims

1. A cold pressing device for preventing deformation of lithium batteries, comprising: The U-shaped first mounting frame (7) is characterized in that a fixed heating roller (2), an upper pressure roller (10) and a lower pressure roller (11) are rotatably connected to the first mounting frame (7), respectively, the upper pressure roller (10) being arranged directly above the lower pressure roller (11), second slide grooves (25) penetrating the first mounting frame (7) are provided on both sides of the first mounting frame (7), and the second slide grooves (25) are located above the fixed heating roller (2), the upper end of the first mounting frame (7) is fixedly connected to a U-shaped support frame (6), a lifting mechanism (8) is provided above the first mounting frame (7), and the lifting mechanism (8) passes through the first mounting frame (7) and extends into the second slide groove (25), a movable heating roller (3) is provided directly above the fixed heating roller (2), and both ends of the rotating shaft of the movable heating roller (3) penetrate the second slide grooves located in the slide grooves A lifting mechanism (8), the top of the second slide groove (25) is fixedly connected to a spring (24), and the lifting mechanism (8) passes through the middle of the spring (24), the lifting mechanism (8) is used to drive the heating roller (3) to rise, one side of the first mounting frame (7) is fixedly connected to a motor (5), and the output end of the motor (5) is fixedly connected to the rotating shaft of the lower pressure roller (11), the first mounting frame (7) is provided with two mutually meshing transmission gears (12) on the side away from the motor (5), and the rotating shafts of the lower pressure roller (11) and the upper pressure roller (10) are respectively fixedly connected to the middle of the two transmission gears (12), one end of the first mounting frame (7) is fixedly connected to a limiting mechanism (1) communicated with the first mounting frame (7), and the limiting mechanism (1) is used to limit the two sides of the workpiece before rolling.

2. The anti-deformation cold pressing device for lithium battery production according to claim 1, characterized in that: A controller (4) is fixedly connected to a side of the limiting mechanism (1) away from the first mounting frame (7), and a display panel and control buttons are mounted on the surface of the controller (4).

3. The anti-deformation cold pressing device for lithium battery production according to claim 1, characterized in that: A lifting cylinder (9) is fixedly connected to the middle of the upper end of the support frame (6), and a piston rod of the lifting cylinder (9) passes downward through the support frame (6) and is slidably connected to the support frame (6), and a lower end of the piston rod of the lifting cylinder (9) is fixedly connected to the middle of the lifting mechanism (8).

4. The anti-deformation cold pressing device for lithium battery production according to claim 3, characterized in that: The lifting mechanism (8) is composed of a connecting plate (26), a sliding block (27) and a second telescopic rod (28). The connecting plate (26) is arranged above the first mounting frame (7), and the lower end of the piston rod of the lifting cylinder (9) is fixedly connected to the connecting plate (26). Two second telescopic rods (28) are provided and are symmetrically fixedly connected to the lower end of the connecting plate (26). The second telescopic rods (28) penetrate downwardly through the first mounting frame (7) and extend into the second slide groove (25). The second telescopic rods ( The movable heating roller (3) is provided with a plurality of movable extension rods (28) and a plurality of movable extension rods (28) extending through the middle of the spring (24), the second telescopic rod (28) is slidably connected to the first mounting frame (7), the slider (27) is arranged in the second slide groove (25) and is slidably connected to the second slide groove (25), and the lower end of the second telescopic rod (28) is fixedly connected to the middle of the upper end of the slider (27), the lower end of the spring (24) is fixedly connected to the upper end of the slider (27), and the two ends of the rotating shaft of the movable heating roller (3) respectively pass through the slider (27) and are rotatably connected to the slider (27).

5. The anti-deformation cold pressing device for lithium battery production according to claim 1, characterized in that: The limiting mechanism (1) is composed of a limiting frame (13), a bidirectional screw rod (16), a support block (17), a second mounting frame (19), a fixing plate (20), a first telescopic rod (21) and a limiting roller (22); the limiting frame (13) is a U-shaped structure fixedly connected to one end of the first mounting frame (7); a first sliding groove (23) is provided at the bottom of the limiting frame (13); chambers (14) are provided on both sides of the inner wall of the limiting frame (13); the first telescopic rod (21) is fixedly connected to opposite sides of the two chambers (14); the second mounting frame (19) is fixedly connected to the other end of the first telescopic rod (21); the second mounting frame (19) is slidably connected to the side wall of the chamber (14); the limiting roller (22) is provided with a first sliding groove (23); and the first telescopic rod (21) is fixedly connected to the opposite sides of the two chambers (14). 22) is vertically installed in the second mounting frame (19), the support block (17) is fixedly connected to the lower end of the second mounting frame (19), and the lower end of the support block (17) passes through the first slide groove (23), the fixed plate (20) is respectively fixedly connected to the two sides of the bottom of the limit frame (13), the bidirectional screw rod (16) is arranged between the two fixed plates (20), and the bidirectional screw rod (16) passes through the middle of the two fixed plates (20) and is rotatably connected to the fixed plates (20), the bidirectional screw rod (16) passes through the middle of the support block (17) and is threadedly matched with the support block (17), and the support block (17) is respectively located in the two thread directions of the bidirectional screw rod (16), and one end of the bidirectional screw rod (16) is fixedly connected to a handwheel (15).

6. The anti-deformation cold pressing device for lithium battery production according to claim 5, characterized in that: Guide grooves (18) are symmetrically provided on both sides of the inner wall of the first sliding groove (23), and the support block (17) extends into the guide groove (18) and is slidably connected to the guide groove (18).

7. The anti-deformation cold pressing device for lithium battery production according to claim 5, characterized in that: Two first telescopic rods (21) are provided in the chamber (14).

8. The anti-deformation cold pressing device for lithium battery production according to claim 1, characterized in that: The movable heating roller (3) and the fixed heating roller (2) are both electromagnetic heating rollers, and the interiors of the movable heating roller (3) and the fixed heating roller (2) are both composed of a metal roller body, a support shaft, an induction coil, and a temperature sensor.

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