Automatic feeding device and automatic feeding method for lithium battery winding machine

Abstract

The invention provides an automatic feeding device and an automatic feeding method for a lithium battery winding machine. The automatic feeding device comprises a conveying unit, a winding material barrel, a feeding clamp and a winding material hanging shaft, the transportation unit comprises a chassis and a supporting frame, the supporting frame is longitudinally and fixedly arranged on the chassis, and the chassis drives the supporting frame to move in any direction on a plane; the outer wall of the roll material barrel bears roll materials; the feeding clamp is installed on the supporting frame through the lifting module, and the lifting module is arranged in the longitudinal direction of the supporting frame. The coil stock hanging shaft is used for hanging a coil stock barrel, the coil stock hanging shaft comprises a telescopic assembly and a tensioning assembly, and the telescopic movement of the telescopic assembly drives the tensioning assembly to stretch or retract; and the automatic feeding device is used for feeding the coil stock. Through mutual cooperation of all the parts, the coil stock is automatically conveyed to the designated position of the winding machine, a coil stock barrel is automatically, smoothly and accurately placed into a coil stock hanging shaft in a friction-free mode, manpower is saved, friction is avoided in the whole process, and automatic feeding is achieved in the whole process.

Description

[0001] This application is a divisional application of the invention patent with application date of June 14, 2022, application number 202210673593.2, and name “An automatic feeding device and automatic feeding method for a lithium battery winding machine”. Technical Field

[0002] The invention belongs to the technical field of lithium battery manufacturing, and in particular relates to an automatic feeding device and an automatic feeding method for a lithium battery winding machine. Background Art

[0003] According to different industry classifications, winding machines include lithium battery winding machines, capacitor winding machines, textile winding machines, etc. Lithium battery winding machines are used for automatic winding of large square battery bare cells. The positive and negative electrodes and diaphragms are actively unwound. After automatic deviation correction and automatic tension control, they are automatically wound together with the diaphragm according to the process requirements. The existing lithium battery manufacturing process requires manual loading of coils. As labor costs become higher and higher, automatic loading is gradually adopted, which is not only efficient but also more accurate.

[0004] However, the existing feeding mechanism has friction during the feeding process, which is not conducive to smoothly placing the material roll into the coil hanging shaft of the winding machine.

[0005] Therefore, it is necessary to provide an improved technical solution to address the above-mentioned deficiencies in the prior art. Summary of the invention

[0006] In view of the shortcomings of the prior art described above, the purpose of the present invention is to provide an automatic feeding device and an automatic feeding method for a lithium battery winding machine, so as to solve the problem in the prior art that friction exists during the feeding process, resulting in the inability to smoothly place the material roll into the winding machine's coil hanging shaft.

[0007] In order to achieve the above-mentioned object and other related objects, the present invention provides an automatic feeding device for a lithium battery winding machine, the automatic feeding device comprising:

[0008] A transport unit, the transport unit comprising a chassis and a support frame, the support frame being longitudinally fixedly arranged on the chassis, and the chassis drives the support frame to move in any direction on a plane;

[0009] A coil barrel, the outer wall of which carries the coil, and the inner wall of which is a through hole;

[0010] A loading fixture, the loading fixture is used to take and place the coil barrel, the loading fixture is installed on the support frame through a lifting module, the lifting module is arranged longitudinally along the support frame, the lifting module drives the loading fixture to rise or fall to a specified height of the winding machine, and then loads the coil barrel;

[0011] A coil hanging shaft, which is used to hang the coil drum, and includes a telescopic component and a tensioning component. The telescopic movement of the telescopic component drives the tensioning component to open or contract. The tensioning component in the contracted state extends into the through hole of the coil drum, and the coil drum is fixed by opening the tensioning component.

[0012] Preferably, the lifting module comprises a guide rail, a guide block and a driving assembly, the guide rail is arranged longitudinally along the support frame, the guide block is installed on the guide rail, and the driving assembly drives the guide block to rise or fall along the guide rail.

[0013] Preferably, the lifting module also includes a controller, which is connected to the driving component, and the controller adjusts the height of the loading fixture by controlling the driving component; wherein the driving component is a driving motor, and the driving motor provides power for the guide block.

[0014] Preferably, the loading fixture comprises a first servo electric cylinder and a clamping claw;

[0015] The cylinder body of the first servo electric cylinder is transversely fixed on the guide block, and the telescopic end of the first servo electric cylinder is connected with a slider, and the slider includes a fixed block and a plurality of inclined slide rails arranged around the fixed block, and the inclined slide rails are all inclined in a direction away from the fixed block;

[0016] The clamping jaws are respectively mounted on the inclined slide rails and slide on the inclined slide rails. The first servo electric cylinder drives the slide block to extend or retract through the telescopic end, thereby driving the clamping jaws to open or retract.

[0017] Preferably, the tensioning assembly fixes the coiled material barrel in an open state, and each tensioning sheet of the tensioning assembly is located in a gap opened between every two adjacent clamping jaws.

[0018] Preferably, adjacent tensioning sheets and clamping jaws are offset by 45°.

[0019] Preferably, the telescopic assembly is a second servo electric cylinder, and the second servo electric cylinder comprises a cylinder body and a telescopic rod;

[0020] The tensioning assembly includes a plurality of tensioning plates, which are arranged along the circumference of the telescopic rod, and each of the tensioning plates is connected to the second servo electric cylinder through two connecting rods; the two connecting rods are respectively a first connecting rod and a second connecting rod, one end of the first connecting rod is connected to the cylinder body, and the other end of the first connecting rod is connected to the tensioning plate; one end of the second connecting rod is connected to an end of the telescopic rod away from the cylinder body, and the other end of the second connecting rod is connected to the tensioning plate.

[0021] Preferably, a laser radar is provided at the top of the support frame, and the laser radar is used to detect the external environment.

[0022] Preferably, one end of the laser radar is electrically connected to a control unit, the input end of the control unit is used to receive the external environment signal detected by the laser radar, the output end of the control unit is electrically connected to the chassis, and the control unit plans and controls the movement trajectory of the chassis according to the received signal.

[0023] Preferably, the automatic loading device also includes a through-beam photoelectric sensor, which includes a transmitter and a receiver. The transmitter is arranged at the center position of the loading fixture, and the receiver is arranged at the center position of the coil hanging shaft. The light source emitted by the transmitter is incident on the receiver to determine whether the position of the loading fixture and the coil hanging shaft is accurately aligned.

[0024] Preferably, the chassis is a Mecanum wheel chassis.

[0025] In addition, the present invention also provides an automatic feeding method for a lithium battery winding machine, and the automatic feeding method specifically comprises the following steps:

[0026] Provide any feasible automatic feeding device for lithium battery winding machine mentioned above;

[0027] The material loading fixture is used to clamp the coil barrel, and the height of the material loading fixture is adjusted by the movement of the chassis and the lifting module to transport the coil barrel to the front of the coil hanging shaft;

[0028] The chassis performs a linear feeding motion in the direction of the coil hanging shaft, the tensioning assembly in a contracted state extends into the through hole of the coil barrel, and the tensioning assembly opens to fix the coil barrel;

[0029] The loading fixture is retracted, and the chassis moves in a direction away from the coil hanging shaft, completing one loading.

[0030] As described above, the automatic feeding device and automatic feeding method of the lithium battery winding machine of the present invention have the following beneficial effects:

[0031] The present invention automatically transports the coils in the pole piece warehouse to the designated position of the winding machine through the cooperation of various parts. The Mecanum wheel chassis controls the loading fixture to move horizontally along the x-axis direction, linearly feed along the y-axis direction, and rotate around the z-axis. Then, the lifting module realizes the vertical rising or falling movement of the loading fixture. The external environment information is obtained through the laser radar. The control unit controls the movement trajectory of the chassis through data information processing to transport the coil barrel to the designated position of the winding machine. In addition, the first servo electric cylinder controls the fixed block to realize the clamping claw The opening or contraction of the tensioning piece is realized by controlling the connecting rod through the second servo electric cylinder. The tensioning piece on the coil hanging shaft and the clamping claw on the feeding clamp are staggered with each other to avoid interference. After the coil drum reaches the specified position of the winding machine, the feeding clamp and the coil hanging shaft cooperate with each other to realize the coil drum being smoothly and accurately placed into the coil hanging shaft without friction. The automatic feeding device realizes the automatic transportation of the coil from the storage position to the specified position of the winding machine and completes automatic feeding, which not only saves manpower, but also has no friction in the whole process and automatic feeding throughout the process. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] Figure 1 It is a schematic diagram of the structure of the automatic feeding device of the winding machine in a specific embodiment of the present invention.

[0033] Figure 2 It shows a schematic structural diagram of the first loading state of the automatic loading device of the winding machine in a specific embodiment of the present invention.

[0034] Figure 3 It shows a schematic diagram of the second loading state structure of the automatic loading device of the winding machine in a specific embodiment of the present invention.

[0035] Figure 4 It is a schematic diagram showing the structure of a coiled material hanging scroll.

[0036] Figure 5 Shown is a schematic diagram of the structure of the loading fixture.

[0037] Figure 6 Shown is a schematic diagram of the structure of the transport unit and the lifting module.

[0038] Component number description

[0039] 100 Coil Hanging Scroll

[0040] 101 Second servo cylinder

[0041] 102 tensioning sheet

[0042] 103 First connecting rod

[0043] 104 Second connecting rod

[0044] 200 Coil Barrel

[0045] 300 Loading fixture

[0046] 301 First servo cylinder

[0047] 302 Slider

[0048] 303 Gripper

[0049] 400 lifting module

[0050] 401 Guide Rail

[0051] 402 Guide Block

[0052] 403 Driver Components

[0053] 500 LiDAR

[0054] 600 Chassis

[0055] 700 Support frame DETAILED DESCRIPTION

[0056] The following is a description of the implementation of the present invention by means of specific embodiments. Those skilled in the art can easily understand other advantages and effects of the present invention from the contents disclosed in this specification.

[0057] See also Figures 1 to 6 . It should be noted that the structures, proportions, sizes, etc. illustrated in the drawings in this specification are only used to match the contents disclosed in the specification for people familiar with this technology to understand and read, and are not used to limit the limiting conditions for the implementation of the present invention, so they have no substantial technical significance. Any modification of the structure, change in the proportional relationship, or adjustment of the size should still fall within the scope of the technical content disclosed by the present invention without affecting the effects and purposes that can be achieved by the present invention. At the same time, the terms such as "upper", "lower", "left", "right", "middle" and "one" quoted in this specification are only for the convenience of description, and are not used to limit the scope of the implementation of the present invention. Changes or adjustments in their relative relationships should also be regarded as the scope of the implementation of the present invention without substantially changing the technical content.

[0058] The present invention automatically transports the coils in the pole piece warehouse to the designated position of the winding machine through the cooperation of various parts. The Mecanum wheel chassis controls the loading fixture to move horizontally along the x-axis direction, linearly feed along the y-axis direction, and rotate around the z-axis. Then, the lifting module realizes the vertical rising or falling movement of the loading fixture. The external environment information is obtained through the laser radar. The control unit controls the movement trajectory of the chassis through data information processing to transport the coil barrel to the designated position of the winding machine. In addition, the first servo electric cylinder controls the fixed block to realize the clamping claw The opening or contraction of the tensioning piece is realized by controlling the connecting rod through the second servo electric cylinder. The tensioning piece on the coil hanging shaft and the clamping claw on the feeding clamp are staggered with each other to avoid interference. After the coil drum reaches the specified position of the winding machine, the feeding clamp and the coil hanging shaft cooperate with each other to realize the coil drum being smoothly and accurately placed into the coil hanging shaft without friction. The automatic feeding device realizes the automatic transportation of the coil from the storage position to the specified position of the winding machine and completes automatic feeding, which not only saves manpower, but also has no friction in the whole process and automatic feeding throughout the process.

[0059] The present invention provides an automatic feeding device for a lithium battery winding machine, which comprises: a transport unit, a coil barrel 200, a feeding fixture 300 and a coil hanging shaft 100; wherein the transport unit comprises a chassis 600 and a support frame 700, the support frame 700 is longitudinally fixedly arranged on the chassis 600, and the chassis 600 drives the support frame 700 to move in any direction on a plane; the outer wall of the coil barrel 200 carries the coil, and the inner wall of the coil barrel 200 is a through hole; the feeding fixture 300 is used to take and place the coil barrel 200, and the feeding fixture 300 is through-hole. The lifting module 400 is installed on the support frame 700. The lifting module 400 is arranged longitudinally along the support frame 700. The lifting module 400 drives the loading clamp 300 to rise or fall to the specified height of the winding machine, and then loads the coil drum 200; the coil hanging shaft 100 is used to hang the coil drum 200. The coil hanging shaft 100 includes a telescopic component and a tensioning component. The telescopic movement of the telescopic component drives the opening or contraction of the tensioning component. The tensioning component in the contracted state extends into the through hole of the coil drum, and the coil drum 200 is fixed by opening the tensioning component.

[0060] Specifically, the chassis 600 drives the support frame 700 to move in any direction on the plane. Specifically, the chassis 600 moves laterally along the x-axis direction, linearly moves along the y-axis direction, and rotates around the z-axis, so that the chassis 600 drives the support frame 700 to make the same movement, wherein the x-axis and the y-axis are arranged perpendicular to each other on the plane, and the z-axis is perpendicular to the plane formed by the x-axis and the y-axis.

[0061] As an example, the chassis 600 is a Mecanum wheel chassis 600 .

[0062] Specifically, the Mecanum wheel chassis 600 can achieve lateral movement in the x-axis direction, linear feed movement in the y-axis direction, and rotation in situ around the z-axis, similar to the effect of a universal wheel. In this embodiment, the Mecanum wheel chassis 600 and the lifting module 400 cooperate with each other to transport the coil to the accurate loading position in front of the winding machine; of course, in other embodiments, the chassis 600 can also be set as a chassis 600 equipped with universal wheels, which is not too restrictive. In addition, the chassis 600 is also connected to a control module, which automatically controls the moving direction and distance of the chassis 600 by controlling the Moqua.

[0063] For example, see Figure 6 The lifting module 400 includes a guide rail 401, a guide block 402 and a driving assembly 403. The guide rail 401 is longitudinally arranged along the support frame 700, the guide block 402 is installed on the guide rail 401, and the driving assembly 403 drives the guide block 402 to rise or fall along the guide rail 401.

[0064] As an example, the lifting module 400 also includes a controller, which is connected to the driving component 403. The controller adjusts the height of the loading fixture 300 by controlling the driving component 403; wherein the driving component 403 is a driving motor, and the driving motor provides power for the guide block 402.

[0065] Specifically, the loading fixture 300 is installed on the guide block 402, and the guide block 402 is raised or lowered along the guide rail 401, thereby driving the loading fixture 300 to be raised or lowered; in addition, the driving motor is controlled by the controller to realize automatic operation, so that the coil barrel 200 can be raised or lowered to the specified height of the winding machine.

[0066] As an example, the loading fixture 300 includes a first servo electric cylinder 301 and a clamping jaw 303; the cylinder body of the first servo electric cylinder 301 is transversely fixed on the guide block 402, and the telescopic end of the first servo electric cylinder 301 is connected to a slider 302, and the slider 302 includes a fixed block and a plurality of inclined slide rails arranged around the fixed block, and the inclined slide rails are all inclined in a direction away from the fixed block;

[0067] The clamping jaws 303 are respectively mounted on the inclined slide rails and slide on the inclined slide rails. The first servo electric cylinder 301 drives the fixed block to extend or retract through the telescopic end, thereby driving the clamping jaws 303 to open or retract.

[0068] For details, see Figure 1 , Figure 4Four inclined slide rails are evenly arranged around the fixed block. In the present embodiment, the four inclined slide rails and the fixed block can be integrally formed as two crossed trapezoidal sliders 302. In other embodiments, the four inclined slide rails and the fixed block can also be separately arranged. In addition, the number of inclined slide rails can also be five, six, etc. There is no excessive restriction on the number of inclined slide rails.

[0069] In this embodiment, the clamp 303 is installed on the inclined slide rail through a connecting piece, and the forward and backward extension and retraction of the telescopic end of the first servo electric cylinder 301 drives the slider 302 to perform forward and backward telescopic movement. When the slider 302 moves forward, the clamp 303 moves obliquely upward along the inclined slide rail, so that the clamp 303 is in an open state; when the slider 302 moves backward, the clamp 303 moves obliquely downward along the inclined slide rail, so that the clamp 303 is retracted.

[0070] In addition, the servo electric cylinder is a modular product that integrates the servo motor and the lead screw, converts the rotary motion of the servo motor into linear motion, and converts the best advantage of the servo motor, precise torque control, into precise speed control, precise position control, and precise thrust control, to achieve high-precision linear motion. Of course, in other embodiments, the first servo electric cylinder 301 can also be replaced by a cylinder or a hydraulic cylinder, but the actual control accuracy and the effect produced may not be as good as the servo electric cylinder, and no excessive restrictions are made here.

[0071] As an example, the telescopic component is a second servo electric cylinder 101, which includes a cylinder body and a telescopic rod; the tensioning component includes a plurality of tensioning plates 102, which are arranged along the circumference of the telescopic rod, and each tensioning plate 102 is connected to the second servo electric cylinder 101 through two connecting rods; the two connecting rods are respectively a first connecting rod 103 and a second connecting rod 104, one end of the first connecting rod 103 is connected to the cylinder body, and the other end of the first connecting rod 103 is connected to the tensioning plate 102; one end of the second connecting rod 104 is connected to an end of the telescopic rod away from the cylinder body, and the other end of the second connecting rod 104 is connected to the tensioning plate 102.

[0072] Specifically, the opening and contraction of the tensioning sheet 102 is controlled by a connecting rod. The first connecting rod 103 and the second connecting rod 104 are cross-arranged. The first connecting rod 103 and the second connecting rod 104 are respectively connected to the two ends of the tensioning sheet 102. The other end of the first connecting rod 103 is connected to the cylinder body, and the other end of the second connecting rod 104 is connected to the telescopic rod. When the telescopic rod is shortened, the first connecting rod 103 and the second connecting rod 104 support the tensioning sheet 102 so that the tensioning sheet 102 is in an open state. When the telescopic rod is extended, the first connecting rod 103 and the second connecting rod 104 drive the tensioning sheet 102 to contract.

[0073] See also Figure 1 , Figure 3As shown, the tensioning piece 102 on the coil hanging shaft 100 is in an open state. In this embodiment, four tensioning pieces 102 are provided, and the four tensioning pieces 102 are evenly arranged along the circumference of the telescopic rod of the second servo electric cylinder 101. When the four tensioning pieces 102 are in a contracted state, the tensioning assembly forms a cylindrical shaft around the telescopic rod, which is used to extend into the through hole of the coil barrel 200, and then the tensioning piece 102 is opened to hang the coil barrel 200. However, in other embodiments, the number of tensioning pieces 102 can also be five, six, etc., and the specific number of tensioning pieces 102 is not excessively limited here.

[0074] In addition, during the feeding process, the feeding clamp 303 fixes the coil barrel 200, and then moves the base and adjusts the height of the lifting module 400 to move the feeding clamp 303 to the exact position specified by the winding machine. At this time, the tensioning sheet 102 on the coil hanging shaft 100 is in a retracted state, and the feeding clamp 303 moves along the lateral feeding to hang the coil barrel 200 on the coil shaft. At this time, the tensioning sheet 102 opens the fixed column coil barrel 200, and the clamp 303 shrinks and exits the coil barrel 200, thereby completing automatic feeding; during this feeding process, the tensioning sheet 102 and the clamp 303 are staggered, so as to avoid mutual interference. Preferably, the tensioning sheet 102 and the clamp 303 are staggered at 45°. As an example, a laser radar 500 is arranged at the top of the support frame 700, and the laser radar 500 is used to detect the external environment.

[0075] As an example, one end of the laser radar 500 is electrically connected to a control unit, the input end of the control unit is used to receive the external environment signal detected by the laser radar 500, the output end of the control unit is electrically connected to the chassis 600, and the control unit plans and controls the movement trajectory of the chassis 600 according to the received signal.

[0076] Specifically, the laser radar 500 is a radar system that emits laser beams to detect characteristic quantities such as the position and speed of a target. The laser radar 500 can scan the on-site environment and establish a map model of the site. The control unit performs data analysis and processing based on the signals detected by the laser radar 500, and then plans the motion trajectory of the chassis 600 and avoids obstacles in real time. However, there are no excessive restrictions on the specific structure and model of the laser radar 500, as long as it can meet actual usage requirements.

[0077] As an example, the automatic loading device also includes a through-beam photoelectric sensor, which includes a transmitter and a receiver. The transmitter is arranged at the center position of the loading fixture 300, and the receiver is arranged at the center position of the coil hanging shaft 100. The light source emitted by the transmitter is incident on the receiver to determine whether the positions of the loading fixture 300 and the coil hanging shaft 100 are accurately aligned.

[0078] Specifically, the transmitter and receiver of the through-beam photoelectric sensor are separated, and the main detection basis is whether the projected light is blocked. It is not affected by the shape, color, tilt, etc. of the detected object. In this embodiment, the coil hanging shaft 100 and the loading clamp 300 use the through-beam photoelectric sensor to feedback whether they have reached the accurate position.

[0079] In order to better understand the automatic feeding device of the lithium battery winding machine in the present invention, the present invention also provides an automatic feeding method of the lithium battery winding machine, which specifically includes the following steps:

[0080] S1. Provide the above-mentioned automatic feeding device of the lithium battery winding machine;

[0081] S2. Use the loading clamp 300 to clamp the coil barrel 200, and transport the coil barrel 200 to the front of the coil hanging shaft 100 through the movement of the chassis 600 and the adjustment of the height of the lifting module 400. Specifically, when the clamp 303 is in a retracted state, it passes through the through hole of the coil barrel 200, and the clamp 303 is opened to fix the coil barrel 200 on the clamp 303. The laser radar 500 obtains the external environment information and sends it to the control unit. The control unit The movement trajectory of the chassis 600 is planned and controlled by the number. The chassis 600 moves according to the movement trajectory and realizes the real-time obstacle avoidance function. The coil barrel 200 is transported to the accurate position through the movement of the chassis 600 and the height adjustment of the loading fixture 300 by the lifting module 400. When the accurate position is reached, the opposite-beam photoelectric sensor at the center of the coil hanging shaft 100 and the loading fixture 300 feedbacks whether the accurate position has been reached; wherein, the accurate position is that the coil barrel 200 is located directly in front of the coil hanging shaft 100;

[0082] S3, the chassis 600 performs a linear feeding motion in the direction of the coil hanging shaft 100, the tensioning assembly in the contracted state extends into the through hole of the coil barrel 200, and the tensioning assembly opens to fix the coil barrel 200; wherein each tensioning sheet 102 of the tensioning assembly is respectively located in the gap between each two adjacent clamping jaws 303, and preferably, the adjacent tensioning sheets and the clamping jaws are offset by 45°;

[0083] S4, the loading fixture 300 retracts, and the bottom plate 600 moves away from the coil hanging shaft 100, completing one loading.

[0084] In summary, the present invention automatically transports the coils of the pole piece library to the specified position of the winding machine through the mutual cooperation of various parts, and the Mecanum wheel chassis controls the loading fixture to move horizontally along the x-axis direction, linearly feed along the y-axis direction, and rotate around the z-axis. Then, the lifting module realizes the rising or falling movement of the loading fixture in the vertical direction, obtains external environmental information through the laser radar, and the control unit controls the movement trajectory of the chassis through data information processing to transport the coil barrel to the specified position of the winding machine; in addition, the first servo electric cylinder controls the fixed block to realize The opening or contraction of the clamping jaws is realized by controlling the connecting rod through the second servo electric cylinder, and the opening or contraction of the tensioning piece is realized. The tensioning piece on the coil hanging shaft and the clamping jaw on the loading clamp are mutually staggered to avoid interference. After the coil barrel reaches the designated position of the winding machine, the loading clamp and the coil hanging shaft cooperate with each other to realize the smooth and accurate placement of the coil barrel into the coil hanging shaft without friction. The automatic loading device realizes the automatic transportation of the coil from the storage position to the designated position of the winding machine and completes the automatic loading, which not only saves manpower, but also has no friction in the whole process, and the loading is automatic throughout the whole process. Therefore, the present invention effectively overcomes various shortcomings in the prior art and has a high industrial utilization value.

[0085] The above embodiments are merely illustrative of the principles and effects of the present invention, and are not intended to limit the present invention. Anyone familiar with the art may modify or alter the above embodiments without departing from the spirit and scope of the present invention. Therefore, all equivalent modifications or alterations made by a person of ordinary skill in the art without departing from the spirit and technical concept disclosed by the present invention shall still be covered by the claims of the present invention.

Claims

1. An automatic feeding device for a lithium battery winding machine, characterized in that: The automatic feeding device comprises: A transport unit, the transport unit comprising a chassis and a support frame, the support frame being longitudinally fixedly arranged on the chassis, and the chassis drives the support frame to move in any direction on a plane; A coil barrel, wherein the inner wall of the coil barrel is a through hole; A loading fixture, the loading fixture is used to take and place the coil barrel, the loading fixture is installed on the support frame through a lifting module, and the lifting module drives the loading fixture to rise or fall; A coil hanging shaft, the coil hanging shaft is used to hang the coil drum, the coil hanging shaft comprises a telescopic component and a tensioning component, the telescopic movement of the telescopic component drives the tensioning component to open or contract, the tensioning component in the contracted state extends into the through hole of the coil drum, and the coil drum is fixed by opening the tensioning component; The lifting module comprises a guide rail, a guide block and a driving assembly, wherein the guide rail is arranged longitudinally along the support frame, and the guide block is installed on the guide rail; The loading fixture comprises a first servo electric cylinder and a clamping claw; The cylinder body of the first servo electric cylinder is transversely fixed on the guide block, and the telescopic end of the first servo electric cylinder is connected with a slider, and the slider includes a fixed block and a plurality of inclined slide rails arranged around the fixed block, and the inclined slide rails are all inclined in a direction away from the fixed block; The clamping jaws are respectively mounted on the inclined slide rails, and the first servo electric cylinder drives the slide block to extend or retract through the telescopic end, thereby driving the clamping jaws to open or retract; The telescopic component is a second servo electric cylinder, and the second servo electric cylinder includes a cylinder body and a telescopic rod; The tensioning assembly includes a plurality of tensioning plates, which are arranged along the circumference of the telescopic rod, and each of the tensioning plates is connected to the second servo electric cylinder through two connecting rods; the two connecting rods are respectively a first connecting rod and a second connecting rod, one end of the first connecting rod is connected to the cylinder body, and the other end of the first connecting rod is connected to the tensioning plate; one end of the second connecting rod is connected to an end of the telescopic rod away from the cylinder body, and the other end of the second connecting rod is connected to the tensioning plate.

2. The automatic feeding device for a lithium battery winding machine according to claim 1, characterized in that: The tensioning assembly fixes the coiled material barrel in an open state, and each tensioning sheet of the tensioning assembly is located in a gap opened between every two adjacent clamping jaws.

3. The automatic feeding device for a lithium battery winding machine according to claim 2, characterized in that: The adjacent tensioning plates and the clamping jaws are offset by 45 degrees.

4. The automatic feeding device for a lithium battery winding machine according to any one of claims 1 to 3, characterized in that: The lifting module also includes a controller, which is connected to the driving component, and the controller adjusts the height of the loading fixture by controlling the driving component; wherein the driving component is a driving motor, and the driving motor provides power for the guide block.

5. The automatic feeding device for a lithium battery winding machine according to any one of claims 1 to 3, characterized in that: A laser radar is arranged on the top of the support frame, and the laser radar is used to detect the external environment.

6. The automatic feeding device for a lithium battery winding machine according to claim 5, characterized in that: One end of the laser radar is electrically connected to a control unit, the input end of the control unit is used to receive the external environment signal detected by the laser radar, the output end of the control unit is electrically connected to the chassis, and the control unit plans and controls the movement trajectory of the chassis according to the received signal.

7. The automatic feeding device for a lithium battery winding machine according to any one of claims 1 to 3, characterized in that: The automatic feeding device also includes a through-beam photoelectric sensor, which includes a transmitter and a receiver. The transmitter is arranged at the center position of the feeding fixture, and the receiver is arranged at the center position of the coil hanging shaft. The light source emitted by the transmitter is incident on the receiver to determine whether the position of the feeding fixture and the coil hanging shaft is accurately aligned.

8. The automatic feeding device for a lithium battery winding machine according to any one of claims 1 to 3, characterized in that: The chassis is a Mecanum wheel chassis.

9. A method for automatically feeding a lithium battery winding machine, characterized in that: The automatic feeding method specifically comprises the following steps: Provide an automatic feeding device for a lithium battery winding machine as claimed in any one of claims 1 to 8; The material loading fixture is used to clamp the coil barrel, and the height of the material loading fixture is adjusted by the movement of the chassis and the lifting module to transport the coil barrel to the front of the coil hanging shaft; The chassis performs a linear feeding motion in the direction of the coil hanging shaft, the tensioning assembly in a contracted state extends into the through hole of the coil barrel, and the tensioning assembly opens to fix the coil barrel; The loading fixture is retracted, and the chassis moves in a direction away from the coil hanging shaft, completing one loading.

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