A winding machine for lithium battery production

Abstract

The present invention relates to the technical field of lithium battery production equipment, and discloses a winding machine for lithium battery production, including a base, a moving mechanism, a movable plate and a rolling mechanism, wherein the movable plate is slidably mounted on the base, the moving mechanism is fixedly mounted on the base, the moving mechanism is transmission-connected with the movable plate, the rolling mechanism is mounted on the movable plate, the rolling mechanism includes a rotating drive assembly, a mounting shaft, a rolling assembly and a locking assembly, the rotating drive assembly is fixedly mounted on the movable plate, the mounting shaft is rotationally mounted on the movable plate, the rotating drive assembly is transmission-connected with the mounting shaft, the rolling assembly includes two winding rods with the same structure, the two winding rods are movably mounted on both sides of the mounting shaft, the winding rods are arranged parallel to the mounting shaft, and the locking assembly is used to lock the distance between the winding rods and the mounting shaft. The present invention is used to solve the problem in the prior art that when pulling the core, the inner layer of the end of the battery core is easily brought out by the support rod to form a conical protrusion, and the product qualification rate is low.

Description

Technical Field

[0001] The present invention relates to the technical field of lithium battery production equipment, and in particular to a winding machine for lithium battery production. Background Art

[0002] Lithium-ion batteries are composed of positive and negative electrode sheets, separators, and tabs. During production, the positive electrode sheets, separators, negative electrode sheets, and separators that are stacked in sequence are wound up using a winding machine.

[0003] For example, a lithium-ion battery pole piece winding device disclosed in Chinese patent [Publication No.: CN111244559B] includes a base, a first vertical plate is arranged on the upper outer surface of the base, an electric telescopic rod is arranged on the outer surface of the first vertical plate, a movable vertical plate is arranged on the top of the electric telescopic rod, a motor is arranged on the upper end of the movable vertical plate, a driving shaft is arranged on the inner side of the movable vertical plate corresponding to the lower end of the motor, a guide rail is arranged on the lower outer surface of the movable vertical plate, a slide groove is provided on the upper outer surface of the base near the lower end of the guide rail, a fixed plate is arranged on the upper outer surface of the base near the front end of the movable vertical plate, a bearing is arranged on the inner outer surface of the fixed plate, and a pressure rod is arranged on the inner side of the bearing. The lithium-ion battery pole piece winding device described in the present invention can ensure the tension of the electrode sheet during the winding process by using the pressure rod, ensure the flatness of the electrode sheet during the winding process, and facilitate the removal of the wound electrode sheet.

[0004] However, during the use of the device, when the wound battery cell is removed from the support rod, the inner layer at the end of the battery cell is easily brought out by the support rod, forming a conical protrusion, and the product qualification rate is low. Summary of the invention

[0005] In view of this, the purpose of the present invention is to provide a winding machine for lithium battery production to solve the problem in the prior art that when pulling the core, the inner layer of the end of the battery cell is easily brought out by the support rod to form a conical protrusion, resulting in a low product qualification rate.

[0006] The present invention solves the above technical problems by the following technical means:

[0007] A winding machine for lithium battery production comprises a base, a moving mechanism, a movable plate and a rolling mechanism, wherein the movable plate is slidably mounted on the base, the moving mechanism is fixedly mounted on the base, the moving mechanism is transmission-connected to the movable plate, the rolling mechanism is mounted on the movable plate, the rolling mechanism comprises a rotating drive assembly, a mounting shaft, a rolling assembly and a locking assembly, the rotating drive assembly is fixedly mounted on the movable plate, the mounting shaft is rotationally mounted on the movable plate, the rotating drive assembly is transmission-connected to the mounting shaft, the rolling assembly comprises two winding rods with the same structure, the two winding rods are movably mounted on both sides of the mounting shaft, the winding rod is arranged parallel to the mounting shaft, and the locking assembly is used to lock the distance between the winding rod and the mounting shaft.

[0008] Furthermore, a plurality of connecting rods are arranged between the winding rod and the mounting shaft, a plurality of first hinged seats are arranged on the winding rod, a plurality of second hinged seats are arranged on the mounting shaft, one end of the connecting rod is hinged to the first hinged seat, and the other end is hinged to the second hinged seat.

[0009] Furthermore, the locking assembly includes a baffle, which is fixedly mounted on an end of the base away from the moving mechanism, and an angle formed between a side of the connecting rod close to the baffle and the mounting axis is no greater than 90°.

[0010] Furthermore, a limiting block is provided on one side of the first hinge seat close to the baffle.

[0011] Furthermore, support plates are provided on both sides of the winding rod, and a plurality of slots are opened on the support plates. The slots on the two support plates are staggered with each other, and the slots on the support plates of the two winding rods are staggered with each other. The support plates of the winding rods are slidably inserted into the corresponding slots of the other winding rod.

[0012] Furthermore, an avoidance hole is provided on the baffle, and a first connecting shaft is provided at the end of the installation shaft, and the first connecting shaft can slide in the avoidance hole.

[0013] Furthermore, the base is provided with a first mounting plate at one end of the baffle, the baffle is fixedly connected to a side of the first mounting plate close to the movable plate, a sliding hole is opened on the first mounting plate, the sliding hole is connected to the avoidance hole, an indicator rod is slidably installed in the sliding hole, and a scale line is set on the indicator rod.

[0014] Furthermore, a slide groove is provided at one end of the baffle plate close to the first mounting plate, the slide groove is connected to the avoidance hole, an adjustment plate is slidably arranged in the slide groove, the adjustment plate is fixedly connected to the indicator rod, a first return spring is arranged in the slide groove, one end of the first return spring abuts against the slide groove, and the other end abuts against the adjustment plate.

[0015] Furthermore, second return springs are arranged in the slots at both ends of the support plate, one end of the second return spring is fixedly connected to the slot, and the other end is fixedly connected to the support plate of the other winding rod.

[0016] Furthermore, the rotation drive assembly includes a drive motor, which is fixedly mounted on a movable plate. A second connecting shaft is provided at the end of the mounting shaft. A mounting hole is provided on the movable plate. The second connecting shaft is rotatably mounted in the mounting hole. The output shaft of the drive motor is fixedly connected to the second connecting shaft.

[0017] Effects of the present invention:

[0018] 1. By setting a mounting shaft, winding rods movably arranged on both sides of the mounting shaft, and a locking assembly, the distance between the two winding rods can be adjusted and locked by the locking assembly, so that the distance between the two winding rods meets the winding size requirements of the lithium battery pole piece; by reducing the distance between the two winding rods by the locking assembly, the winding rods can be separated from the support for the lithium battery pole piece, so that the lithium battery pole piece can be smoothly removed from the two winding rods.

[0019] 2. The movable connection between the winding rod and the mounting shaft is realized by setting a plurality of connecting rods. The baffle is set, and the moving mechanism controls the winding rod to move toward the baffle. The baffle blocks the winding rod, and the distance between the two winding rods can be automatically locked without manual adjustment.

[0020] 3. By providing a support plate and a slot, the two winding rods can move synchronously. By providing an adjustment member, the maximum locking distance between the two winding rods can be adjusted to meet the needs of different winding sizes. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a structural schematic diagram of a winding machine for lithium battery production according to the present invention;

[0022] Figure 2 It is a schematic cross-sectional structure diagram of a winding machine for lithium battery production of the present invention;

[0023] Figure 3 It is a structural schematic diagram of a winding rod and a mounting shaft in a winding machine for lithium battery production of the present invention;

[0024] in,

[0025] 1. base; 11. first mounting plate; 111. slide hole; 12. second mounting plate; 13. slide rail;

[0026] 21. Telescopic cylinder;

[0027] 3. Movable plate; 32. Mounting hole;

[0028] 4. rolling mechanism; 411. driving motor; 42. mounting shaft; 421. first connecting shaft; 422. second connecting shaft; 423. second hinge seat; 43. winding rod; 431. first hinge seat; 432. stop block; 433. support plate; 434. slot; 44. baffle; 441. avoidance hole; 442. slide groove; 45. connecting rod; 46. second return spring;

[0029] 5. Indicator rod; 51. Adjustment plate; 52. First return spring. DETAILED DESCRIPTION

[0030] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. 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 creative work are within the scope of protection of the present invention.

[0031] like Figure 1-Figure 3 As shown, a winding machine for lithium battery production of the present invention comprises a base 1, a moving mechanism, a movable plate 3 and a rolling mechanism 4, wherein:

[0032] The moving mechanism is fixedly mounted on the base 1, and is in transmission connection with the movable plate 3, and is used to drive the movable plate 3 to move. In this embodiment, a first mounting plate 11 is provided at one end of the base 1, and a second mounting plate 12 is provided at the other end. The moving mechanism includes two telescopic cylinders 21, and the telescopic cylinders 21 are fixedly mounted on the second mounting plate 12, and the output shafts of the telescopic cylinders 21 are fixedly connected to the movable plate 3. When the telescopic cylinders 21 are working, the movable plate 3 can be driven to move along the length direction of the base 1. In some other embodiments, the moving mechanism can also drive the movable plate 3 to move by a motor plus a screw.

[0033] The movable plate 3 is slidably mounted on the base 1, and the rolling mechanism 4 is mounted on the movable plate 3, and is used to drive the rolling mechanism 4 to move along the length direction of the base 1. In this embodiment, two slide rails 13 are provided on the base 1, and a slider is provided at the bottom of the movable plate 3. The movable plate 3 is slidably mounted on the slide rails 13 through the slider to realize the sliding connection between the movable plate 3 and the base 1.

[0034] The rolling mechanism 4 is used to roll the lithium battery pole piece. In this embodiment, the rolling mechanism 4 includes a rotation drive component, a mounting shaft 42, a rolling component and a locking component, wherein:

[0035] The mounting shaft 42 is rotatably mounted on the movable plate 3 for mounting the rolling assembly. In this embodiment, a mounting hole 32 is provided on the movable plate 3, a first connecting shaft 421 is provided at one end of the mounting shaft 42, and a second connecting shaft 422 is provided at the other end. The second connecting shaft 422 is rotatably mounted in the mounting hole 32, so as to realize the rotatable connection between the mounting shaft 42 and the movable plate 3.

[0036] The rotary drive assembly is fixedly mounted on the movable plate 3, and the rotary drive assembly is transmission-connected with the mounting shaft 42, and is used to drive the mounting shaft 42 to rotate, and the rotation of the mounting shaft 42 drives the winding assembly to rotate, and the lithium battery pole piece is wound. In this embodiment, the rotary drive assembly includes a drive motor 411, and the drive motor 411 is fixedly mounted on the movable plate 3. The output shaft of the drive motor 411 is fixedly connected to the second connecting shaft 422.

[0037] The winding assembly is used for winding lithium battery pole pieces. In the present embodiment, the winding assembly includes two winding rods 43 of the same structure, and the two winding rods 43 are movably mounted on both sides of the mounting shaft 42, respectively, and the winding rods 43 are arranged parallel to the mounting shaft 42. When the mounting shaft 42 rotates, the two winding rods 43 rotate along with the mounting shaft 42, thereby winding the lithium battery pole pieces. Specifically, a plurality of connecting rods 45 are arranged between the winding rod 43 and the mounting shaft 42, a plurality of first hinge seats 431 are arranged on the winding rod 43, and a plurality of second hinge seats 423 are arranged on the mounting shaft 42. One end of the connecting rod 45 is hinged to the first hinge seat 431, and the other end is hinged to the second hinge seat 423, so as to realize the movable connection between the winding rod 43 and the mounting shaft 42. In some other embodiments, the movable connection between the winding rod 43 and the mounting shaft 42 can also be realized by the cooperation of the sliding rod and the through hole.

[0038] The locking assembly is used to lock the distance between the winding rod 43 and the mounting shaft 42, and to lock the distance between the two winding rods 43. In this embodiment, the locking assembly includes a baffle 44, which is fixedly mounted on the end of the base 1 away from the moving mechanism. In this embodiment, the baffle 44 is fixedly mounted on the first mounting plate 11, and the angle formed by the side of the connecting rod 45 close to the baffle 44 and the mounting shaft 42 is not greater than 90°. When the telescopic cylinder 21 drives the movable plate 3 to move in the direction close to the baffle 44, the movable plate 3 drives the installation shaft 42 and the winding rod 43 to move in the direction close to the baffle 44. When the winding rod 43 contacts the baffle 44, the baffle 44 blocks the winding rod 43. During the continuous movement of the installation shaft 42, the installation shaft 42 pushes the winding rod 43 to move away from the installation shaft 42 through the connecting rod 45, thereby increasing the distance between the winding rod 43 and the installation shaft 42 until the winding rod 43 is perpendicular to the installation shaft 42. At this time, the installation shaft 42 stops moving and locks the position. Under the joint action of the installation shaft 42, the baffle 44 and the connecting rod 45, the position of the winding rod 43 is automatically locked. In some other embodiments, the position can also be locked by setting an adjustable screw between the two winding rods 43.

[0039] In this embodiment, a limiting block 432 is provided on the side of the first hinge seat 431 close to the baffle 44. The limiting block 432 limits the rotation angle of the connecting rod 45, so that the angle formed by the side of the connecting rod 45 close to the baffle 44 and the mounting shaft 42 is not greater than 90°. In some other embodiments, a limiting block 432 may also be provided on the side of the second hinge seat 423 away from the baffle 44 to limit the position of the connecting rod 45.

[0040] In this embodiment, support plates 433 are provided on both sides of the winding rod 43. When the winding rod 43 winds the lithium battery pole piece, the support plate 433 can support the lithium battery pole piece wound on the side of the winding rod 43 to avoid depression. A plurality of slots 434 are provided on the support plate 433. The slots 434 on the two support plates 433 are mutually staggered. The slots 434 on the support plates 433 of the two winding rods 43 are mutually staggered. The support plate 433 of the winding rod 43 is slidably inserted into the slot 434 corresponding to the other winding rod 43. When the winding rods 43 move relative to each other, the two winding rods 43 can move synchronously through the limiting guide of the support plate 433 by the slot 434.

[0041] In this embodiment, the baffle plate 44 is provided with an avoidance hole 441, and the first connecting shaft 421 can slide in the avoidance hole 441 to prevent the baffle plate 44 from blocking the movement of the installation shaft 42. When the first connecting shaft 421 is inserted into the avoidance hole 441, the baffle plate 44 can provide support force for the installation shaft 42, thereby improving the stability of the rotation of the installation shaft 42.

[0042] In this embodiment, the baffle 44 is fixedly connected to the side of the first mounting plate 11 close to the movable plate 3. The first mounting plate 11 is provided with a sliding hole 111, which is connected to the avoidance hole 441. The indicator rod 5 is slidably installed in the sliding hole 111, and a scale line is set on the indicator rod 5. When the mounting shaft 42 moves, it drives the winding rod 43 to move. When the winding rod 43 abuts against the baffle 44, the first connecting shaft 421 of the mounting shaft 42 abuts against the indicator rod 5. During the continuous movement of the mounting shaft 42, the distance between the two winding rods 43 gradually increases. At the same time, the mounting shaft 42 will push the indicator rod 5 to move. By observing the position of the scale line on the indicator rod 5, the distance between the two winding rods 43 can be known.

[0043] In this embodiment, a slide groove 442 is provided at one end of the baffle plate 44 close to the first mounting plate 11, the slide groove 442 is communicated with the avoidance hole 441, an adjustment plate 51 is slidably arranged in the slide groove 442, the adjustment plate 51 is fixedly connected to the indicator rod 5, a first return spring 52 is arranged in the slide groove 442, one end of the first return spring 52 abuts against the slide groove 442, and the other end abuts against the adjustment plate 51. The first return spring 52 is a tension spring, and by providing the adjustment plate 51 and the first return spring 52, when the mounting shaft 42 moves in a direction away from the baffle plate 44, the first return spring 52 can drive the indicator rod 5 to automatically return to its original position through the adjustment plate 51.

[0044] In this embodiment, second return springs 46 are provided in the slots 434 at both ends of the support plate 433, one end of the second return spring 46 is fixedly connected to the slot 434, and the other end is fixedly connected to the support plate 433 of the other winding rod 43. The second spring is a tension spring, and by providing the second return spring 46, when the mounting shaft 42 moves in a direction away from the baffle 44, the second return spring 46 is reset, so that the two winding rods 43 can be brought closer to each other.

[0045] In this embodiment, wear-resistant protrusions are provided on the contact surface between the winding rod 43 and the baffle 44, and on the contact surface between the first connecting shaft 421 and the adjustment plate 51, which play a role in reducing friction and avoiding affecting the rotation of the installation shaft 42.

[0046] The method of use of the present invention is as follows:

[0047] First, the telescopic cylinder 21 is controlled to work, and the telescopic cylinder 21 drives the movable plate 3 to move toward the baffle 44, and the movable plate 3 drives the mounting shaft 42 and the winding rod 43 to move toward the baffle 44 until the winding rod 43 abuts against the baffle 44, and at this time, the mounting shaft 42 abuts against the indicator rod 5;

[0048] Subsequently, the installation shaft 42 is continuously moved toward the direction approaching the baffle 44, and the first connecting shaft 421 of the installation shaft 42 is inserted into the avoidance hole 441 of the baffle 44. The baffle 44 blocks the winding rod 43. During the continuous movement of the installation shaft 42, the installation shaft 42 pushes the winding rod 43 through the connecting rod 45 to move away from the installation shaft 42 until the distance between the two winding rods 43 meets the winding requirements of the lithium battery electrode.

[0049] As the installation shaft 42 continues to move, it will push the indicator rod 5 to move. By observing the position of the scale line on the indicator rod 5, the distance between the two winding rods 43 can be known.

[0050] Then, the lithium battery pole piece is fixed on the two winding rods 43 for winding. After the winding is completed, the telescopic cylinder 21 is controlled to work, and the telescopic cylinder 21 drives the movable plate 3 to move away from the baffle 44. During this process, the distance between the two winding rods 43 is reduced, so that the winding rods 43 are separated from the support for the lithium battery pole piece.

[0051] Finally, the lithium battery pole piece can be removed from the two winding rods 43 .

[0052] The above embodiments are only used to illustrate the technical solutions of the present invention and are not intended to limit the present invention. Although the present invention is described in detail with reference to the preferred embodiments, it should be understood by those skilled in the art that the technical solutions of the present invention may be modified or replaced by equivalents without departing from the purpose and scope of the technical solutions of the present invention, which should be included in the scope of the claims of the present invention. The techniques, shapes, and structural parts not described in detail in the present invention are all known technologies.

Claims

1. A winding machine for lithium battery production, comprising a base, a moving mechanism, a movable plate and a rolling mechanism, wherein the movable plate is slidably mounted on the base, the moving mechanism is fixedly mounted on the base, the moving mechanism is transmission-connected to the movable plate, and the rolling mechanism is mounted on the movable plate, characterized in that: The rolling mechanism comprises a rotating drive assembly, a mounting shaft, a rolling assembly and a locking assembly, wherein the rotating drive assembly is fixedly mounted on the movable plate, the mounting shaft is rotatably mounted on the movable plate, the rotating drive assembly is in transmission connection with the mounting shaft, the rolling assembly comprises two winding rods with the same structure, the two winding rods are movably mounted on both sides of the mounting shaft respectively, the winding rods are arranged parallel to the mounting shaft, and the locking assembly is used to lock the distance between the winding rod and the mounting shaft; A plurality of connecting rods are arranged between the winding rod and the installation shaft, a plurality of first hinge seats are arranged on the winding rod, a plurality of second hinge seats are arranged on the installation shaft, one end of the connecting rod is hinged to the first hinge seat, and the other end is hinged to the second hinge seat; The locking assembly comprises a baffle, which is fixedly mounted on one end of the base away from the moving mechanism, and the angle formed between the side of the connecting rod close to the baffle and the mounting axis is not greater than 90°; Support plates are provided on both sides of the winding rod, and a plurality of slots are opened on the support plates. The slots on the two support plates are staggered with each other, and the slots on the support plates of the two winding rods are staggered with each other. The support plates of the winding rods are slidably inserted into the corresponding slots of the other winding rod.

2. A winding machine for lithium battery production according to claim 1, characterized in that: A limiting block is arranged on one side of the first hinge seat close to the baffle.

3. A winding machine for lithium battery production according to claim 1, characterized in that: The baffle is provided with an avoidance hole, and the end of the mounting shaft is provided with a first connecting shaft, and the first connecting shaft can slide in the avoidance hole.

4. A winding machine for lithium battery production according to claim 3, characterized in that: The base is provided with a first mounting plate at one end of the baffle, the baffle is fixedly connected to a side of the first mounting plate close to the movable plate, a sliding hole is opened on the first mounting plate, the sliding hole is connected to the avoidance hole, an indicator rod is slidably installed in the sliding hole, and a scale line is set on the indicator rod.

5. A winding machine for lithium battery production according to claim 4, characterized in that: A slide groove is provided at one end of the baffle plate close to the first mounting plate, the slide groove is connected to the avoidance hole, an adjustment plate is slidably arranged in the slide groove, the adjustment plate is fixedly connected to the indicator rod, a first return spring is arranged in the slide groove, one end of the first return spring abuts against the slide groove, and the other end abuts against the adjustment plate.

6. A winding machine for lithium battery production according to claim 1, characterized in that: A second return spring is arranged in the slots at both ends of the support plate, one end of the second return spring is fixedly connected to the slot, and the other end is fixedly connected to the support plate of the other winding rod.

7. A winding machine for lithium battery production according to claim 1, characterized in that: The rotary drive assembly includes a drive motor, which is fixedly mounted on a movable plate. A second connecting shaft is provided at the end of the mounting shaft. A mounting hole is provided on the movable plate. The second connecting shaft is rotatably mounted in the mounting hole. The output shaft of the drive motor is fixedly connected to the second connecting shaft.

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