Multi-layer compounding equipment for negative electrode composite foil of power battery

Abstract

The invention relates to the technical field of batteries, and discloses power battery negative electrode composite foil multi-layer compounding equipment which comprises a machine base, a loading assembly arranged on the machine base and used for loading metal foils and thin films, and a winding assembly arranged on the machine base and used for winding the composite foils. The adjusting mechanism is arranged on the machine base and used for adjusting the relaxation degree of the composite foil, and the air injection mechanism is arranged on the adjusting mechanism. According to the multi-layer compounding equipment for the negative electrode composite foil of the power battery, the composite foil is pulled through the two adjusting assemblies which are far away from each other, the tension of the composite foil can be ensured to be in the optimal state, meanwhile, the situation that the wound composite foil is not smooth enough due to the fact that the composite foil is too loose can be avoided, and the winding and arranging effect on the composite foil is further improved; and through the arrangement, on one hand, the uniformity and compactness of the composite layer of the composite foil can be improved, and on the other hand, the problem that the quality of the composite foil is reduced due to the loosening phenomenon after the composite foil is wound can be avoided.

Description

Technical Field

[0001] The invention belongs to the technical field of batteries, and in particular relates to a multilayer composite device for composite foils of negative electrodes of power batteries. Background Art

[0002] As a core component of new energy vehicles, energy storage systems and portable electronic devices, power batteries have become increasingly important in recent years with the trend of global energy transformation and green travel. This type of battery not only requires high energy density, long cycle life and excellent safety, but also needs to be able to maintain stable performance output over a wide temperature range to meet the diverse needs of different application scenarios.

[0003] The core structure of a power battery includes a positive electrode, a negative electrode, an electrolyte and a separator. The selection and performance of the negative electrode material directly determine the overall performance of the battery. In order to improve the energy density, cycle stability and safety of the negative electrode, the industry widely uses composite foil multilayer composite technology to prepare the negative electrode.

[0004] At present, the existing composite equipment often finds it difficult to achieve precise control of the foil tension during the winding composite process, which causes the composite foil to easily become loose after winding. This not only affects the uniformity and tightness of the composite layer, but may also further lead to a decline in battery performance. In addition, the cleaning mechanism of the existing equipment is often not efficient or timely enough to effectively remove the tiny dust and impurities attached to the surface of the foil. These pollutants may be embedded between the foils during the composite process, forming defects, thereby seriously affecting the quality of the final product and the safety performance of the battery. Therefore, the existing equipment has the above-mentioned deficiencies and cannot meet the production and use needs of manufacturers. Therefore, it is necessary to further improve it.

[0005] Therefore, in view of this, the existing structure and deficiencies are studied and improved, and a multi-layer composite equipment for power battery negative electrode composite foil is provided, in order to achieve a more practical purpose. Summary of the invention

[0006] In order to solve the above technical problems, the present invention provides a multi-layer composite device for negative electrode composite foil of power battery, which is achieved by the following specific technical means: A multilayer composite foil composite device for negative electrodes of power batteries, comprising a machine base, a loading assembly arranged on the machine base for loading metal foils and films, and a winding assembly arranged on the machine base for winding composite foils, an adjusting mechanism arranged on the machine base for adjusting the slack of the composite foils, and an air jet mechanism arranged on the adjusting mechanism; The adjustment mechanism includes an adjustment bracket fixedly mounted on the machine base, the adjustment bracket is provided with a driving assembly and a guide assembly, the driving assembly includes a servo motor fixedly mounted on the inner wall of the adjustment bracket, the servo motor is fixedly connected to an adjustment disk using an output end, and an adjustment slide groove is provided on the adjustment disk, and two groups of symmetrically assembled guide assemblies and an adjustment assembly are provided on the adjustment disk; A guide groove is provided on the inner wall of the adjustment bracket, and the guide assembly includes a guide block slidably installed in the guide groove, a guide rod is fixedly installed on one side of the guide block, one end of the guide rod passes through the adjustment slide groove and is fixedly connected to the adjustment assembly, and the servo motor drives the adjustment disk to rotate by using the output end, so that the guide rod can slide in the adjustment slide groove, and the guide rod is used to drive the two adjustment assemblies to move away from each other, and the slackness of the composite foil material that is composite-wound is adjusted.

[0007] As a further description of the above technical solution: the composite foil is pulled by two adjustment components that are far away from each other, thereby avoiding wrinkles in the composite foil and ensuring its tension is in an optimal state. At the same time, it can also avoid the composite foil being too loose, resulting in the composite foil being not flat after winding, and further improve the winding and finishing effect of the composite foil. Through this arrangement, on the one hand, the uniformity and tightness of the composite layer of the composite foil can be improved, and on the other hand, it can avoid the composite foil from becoming loose after winding, resulting in quality degradation problems such as loosening of the composite foil.

[0008] Furthermore, the loading assembly includes a loading rack fixedly mounted on the machine base, on which two loading trays are fixedly mounted, the two loading trays being used to assemble metal foil rolls and film rolls respectively, and the loading rack is also fixedly mounted with auxiliary rollers for composite guiding of metal foil and film.

[0009] As a further description of the above technical solution: the metal foil and film can be accurately guided by auxiliary rollers so that they move along a predetermined path.

[0010] Furthermore, the guide assembly includes a guide frame fixedly mounted on the adjusting disk, a movable shaft is fixedly mounted on the guide frame, and a guide roller is rotatably mounted on the movable shaft.

[0011] As a further description of the above technical solution: through the synergistic effect of the two guide rollers on the guide assembly, the metal foil and film are effectively gathered, further improving their applicability.

[0012] Furthermore, the adjustment assembly includes an adjustment frame, and the outer wall of the adjustment frame is fixedly connected to the guide rod. The adjustment frame is provided with a first composite roller and a second composite roller inside, and a composite channel for moving the composite foil is provided between the first composite roller and the second composite roller.

[0013] As a further description of the above technical solution: the metal foil and the film are compositely extruded by the first composite roller and the second composite roller to ensure that the metal foil and the film are closely fitted together, thereby forming a composite foil.

[0014] Furthermore, a movable groove is provided on the front and rear side walls of the adjustment frame, and an adjustment part is slidably installed on the movable groove, one side of the adjustment part is connected to the second composite roller, a support spring is fixedly connected between the upper side of the adjustment part and the movable groove wall of the adjustment frame, a limit strip is fixedly assembled on the movable groove wall of the adjustment frame, and a limit slot matching the limit strip is provided on the adjustment part.

[0015] As a further description of the above technical solution: this arrangement can enhance the stability of the adjustment part and the second composite roller during movement, while ensuring that the second composite roller exerts a uniform extrusion force on the metal foil and the film.

[0016] Furthermore, a limiting groove is provided on the inner wall of the adjusting bracket, and the limiting groove is located in the guide groove; The guide assembly also includes guide members fixedly assembled on both sides of the guide block, and the guide members are located in the limiting grooves. A connecting spring is connected between one side of the guide block and the inner wall of the guide groove.

[0017] As a further description of the above technical solution: this arrangement can improve the stability of the adjustment component when it moves, and enhance the composite and winding effects of the composite foil.

[0018] Furthermore, the jet mechanism includes a fixing seat fixedly mounted on the inner wall of the adjusting frame, two jet assemblies are symmetrically arranged on the fixing seat, a transmission assembly is arranged between the two jet assemblies, and one side of the transmission assembly is connected to the first composite roller.

[0019] As a further description of the above technical solution: uninterrupted air blowing and cleaning of the surface of the composite foil can be achieved by setting the jet assembly.

[0020] Furthermore, the jet assembly includes a jet shell fixedly mounted on a fixed seat, an inner cavity is provided inside the jet shell, and an extrusion plate is provided in the inner cavity, a one-way inflation valve for automatically inflating the inner cavity of the jet shell is fixedly mounted on the side wall of the jet shell, and a jet head for jet cleaning is fixedly mounted on the side of the jet shell facing the first composite roller.

[0021] As a further description of the above technical solution: through this arrangement, the nozzle can spray air toward the surface of the composite foil material that is composite-wound, and use the sprayed air flow to blow and clean the tiny dust and impurities attached to the surface of the composite foil material.

[0022] Furthermore, the transmission assembly includes a transmission connecting rod, one end of which is rotatably connected to the inner wall of the fixed seat through a fixed bearing, and the other end of the transmission connecting rod is fixedly connected to the first composite roller. A fixed rod is fixedly installed on the extrusion plate, and an extrusion connecting rod is movably connected between the transmission connecting rod and the fixed rod.

[0023] As a further description of the above technical solution: through this arrangement, the extrusion connecting rod can drive the extrusion plate to continuously move back and forth in the jet shell, thereby effectively ensuring that the jet head continues to perform air blowing and cleaning during the composite operation.

[0024] Furthermore, the winding assembly includes a winding frame fixedly mounted on a machine base, a winding motor fixedly mounted on the winding frame, a winding roller rotatably mounted on the winding frame, the winding motor is fixedly connected to the winding roller via an output end, a protective baffle and a winding core fixedly mounted on the winding roller, and the winding core is used to wind and collect the composite foil.

[0025] As a further description of the above technical solution: through this arrangement, the composite foil can be guided to be gradually wound around its periphery by means of the rotating winding core, thereby performing the winding operation of the composite foil.

[0026] In summary, due to the adoption of the above technical solution, the beneficial effects of the present invention are: 1. The multi-layer composite equipment for negative electrode composite foil of power battery can effectively adjust the slackness of composite foil through the synergistic effect among driving component, guiding component, adjusting component and guiding component, and pulls composite foil by two adjusting components far away from each other, thereby avoiding wrinkles in composite foil and ensuring its tension in the best state, and at the same time avoiding excessive slackness of composite foil, which may lead to unevenness of composite foil after winding, and further improving the winding finishing effect of composite foil. This setting can improve the uniformity and tightness of composite layer of composite foil on the one hand, and avoid the slack phenomenon of composite foil after winding, which may lead to quality degradation problems such as slack of composite foil and so on on the other hand.

[0027] 2. The multi-layer composite equipment for negative electrode composite foil of power battery realizes precise composite extrusion of metal foil and film through the cooperation among the adjustment frame, the first composite roller, the second composite roller, the adjustment part and the support spring, ensuring the close fit between the two, thereby forming a high-quality composite foil. This setting not only improves the uniformity and tightness of the composite layer of the composite foil, but also significantly enhances the overall performance of the composite foil.

[0028] 3. The multi-layer composite equipment for negative electrode composite foil of power battery realizes uninterrupted blowing cleaning of the surface of composite foil through the synergistic effect between the second composite roller, the jet assembly and the transmission assembly. This setting effectively avoids the embedding of tiny dust and impurities between the composite foils to form defects during the composite process, thereby further improving the quality of the product and the safety performance of the battery. At the same time, the automatic inflation of the one-way inflation valve ensures the continuous blowing cleaning operation of the jet head, further enhancing the cleaning effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required for describing the embodiments are briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0030] Figure 1 It shows a schematic diagram of an overall three-dimensional structure provided according to an embodiment of the present invention; Figure 2 A schematic structural diagram of a charging assembly according to an embodiment of the present invention is shown; Figure 3 It shows a schematic diagram of the overall structure of the adjustment mechanism provided according to an embodiment of the present invention; Figure 4 It shows a schematic diagram of the unfolding structure of the adjustment mechanism provided in an embodiment of the present invention; Figure 5 A schematic diagram of the installation structure of the guide assembly and the adjustment assembly provided in an embodiment of the present invention is shown; Figure 6 A schematic diagram of a partial structure of an adjustment component provided according to an embodiment of the present invention is shown; Figure 7 It shows a schematic diagram of the installation structure of the second composite roller and the adjustment part provided in an embodiment of the present invention; Figure 8 It shows a schematic diagram of the installation structure of the first composite roller and the jet assembly provided in an embodiment of the present invention; Fig. 9 A schematic diagram of the installation structure of the adjustment frame and the driving assembly provided in an embodiment of the present invention is shown; Fig.10 The embodiment of the present invention provides Fig. 9 The enlarged schematic diagram of part A in the middle; Fig.11 A schematic diagram of a local structure of an air jet mechanism provided according to an embodiment of the present invention is shown; Fig.12 A schematic diagram of the installation structure of the transmission assembly and the extrusion plate provided in an embodiment of the present invention is shown; Fig.13 A schematic diagram of the installation structure of a winding assembly provided according to an embodiment of the present invention is shown.

[0031] Legend: 10. Machine base; 20. Loading assembly; 21. Loading rack; 22. Loading tray; 23. Auxiliary roller; 30. Winding assembly; 31. Winding frame; 32. Winding motor; 33. Winding roller; 34. Protective baffle; 35. Winding core; 40. Adjustment mechanism; 41. Adjustment bracket; 411. Guide slot; 412. Limiting slot; 42. Drive assembly; 421. Servo motor; 422. Adjustment disk; 423. Adjustment slide; 43. Guide assembly; 431. Guide frame; 432. Active shaft; 433. Guide roller; 44. Adjustment assembly; 441. Adjustment frame; 4411. Limiting strip; 442. First composite roller; 443. Second composite roller; 444. Adjustment part; 4441. Limiting slot; 445. Support spring; 45. Guide assembly; 451. Guide block; 452. Guide rod; 453. Connecting spring; 454. Guide member; 50. Jet mechanism; 51. Fixed seat; 52. Jet assembly; 521. Jet shell; 522. Extrusion plate; 523. One-way inflation valve; 524. Jet head; 53. Transmission assembly; 531. Transmission connecting rod; 532. Fixed bearing; 533. Fixed rod; 534. Extrusion connecting rod. DETAILED DESCRIPTION

[0032] The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.

[0033] See also Figures 1 to 13, a multilayer composite equipment for negative electrode composite foil of a power battery, comprising a machine base 10, a loading assembly 20 arranged on the machine base 10 for loading metal foil and film, and a winding assembly 30 arranged on the machine base 10 for winding the composite foil, and also comprising an adjusting mechanism 40 arranged on the machine base 10 for adjusting the slackness of the composite foil, and an air jet mechanism 50 arranged on the adjusting mechanism 40; the adjusting mechanism 40 comprises an adjusting bracket 41 fixedly mounted on the machine base 10, and a driving assembly 42 and a guiding assembly 45 are arranged on the adjusting bracket 41, and the driving assembly 42 comprises a servo motor 421 fixedly mounted on the inner wall of the adjusting bracket 41, and the servo motor 421 is fixedly connected with an adjusting disk 422 by an output end, and an adjusting slide groove 423 is provided on the adjusting disk 422, and two groups of symmetrically assembled guide assemblies 43 and an adjusting assembly 44 are provided on the adjusting disk 422; a guide groove 411 is provided on the inner wall of the adjusting bracket 41, and the guide assembly 45 comprises a servo motor 421 fixedly mounted on the inner wall of the adjusting bracket 41 The guide block 451 in 411 has a guide rod 452 fixedly installed on one side of the guide block 451, and one end of the guide rod 452 passes through the adjusting slot 423 and is fixedly connected to the adjusting component 44. The servo motor 421 uses the output end to drive the adjusting disk 422 to rotate, so that the guide rod 452 can slide in the adjusting slot 423, and the guide rod 452 is used to drive the two adjusting components 44 to move away from each other, and adjust the slackness of the composite foil wound in composite form; the composite foil is pulled by the two adjusting components 44 moving away from each other, thereby avoiding the occurrence of wrinkles in the composite foil and ensuring its tension in the best state, and at the same time avoiding the composite foil from being too loose, resulting in the composite foil after winding being not flat enough, further improving the winding finishing effect of the composite foil, and through this setting, on the one hand, the uniformity and tightness of the composite layer of the composite foil can be improved, and on the other hand, the slack phenomenon of the composite foil after winding, resulting in the slack of the composite foil and other quality degradation problems, can be avoided.

[0034] See also Figure 1 to Figure 2 The loading assembly 20 includes a loading rack 21 fixedly mounted on the machine base 10, and two loading trays 22 are fixedly mounted on the loading rack 21. The two loading trays 22 are used to mount the metal foil roll and the film roll respectively. The loading rack 21 is also fixedly mounted with auxiliary rollers 23 for composite guiding of the metal foil and the film. Through the arrangement of the two loading trays 22, the metal foil roll and the film roll can be placed on the two rotating trays on the loading rack 21 respectively, and the auxiliary rollers 23 can be used to accurately guide the metal foil and the film so that they move along a predetermined path.

[0035] See also Figures 3 to 5The guide assembly 43 includes a guide frame 431 fixedly mounted on the adjusting disk 422, a movable shaft 432 fixedly mounted on the guide frame 431, and a guide roller 433 rotatably mounted on the movable shaft 432; through the coordinated action of the two guide rollers 433 on the guide assembly 43, the metal foil and film are effectively gathered and guided to pass between the first composite roller 442 and the second composite roller 443 on the adjusting assembly 44.

[0036] See also Figures 3 to 6 The adjusting component 44 includes an adjusting frame 441, and the outer wall of the adjusting frame 441 is fixedly connected to the guide rod 452. The adjusting frame 441 is provided with a first composite roller 442 and a second composite roller 443. A composite channel for moving the composite foil is provided between the first composite roller 442 and the second composite roller 443. The metal foil and the film are compositely extruded by the first composite roller 442 and the second composite roller 443 to ensure that the metal foil and the film are closely fitted to form a composite foil, and the composite foil is strengthened by the two adjusting components 44.

[0037] See also Figure 6 to Figure 7 , movable grooves are provided on the front and rear side walls of the adjusting frame 441, and an adjusting portion 444 is slidably installed on the movable groove, one side of the adjusting portion 444 is connected to the second composite roller 443, a supporting spring 445 is fixedly connected between the upper side of the adjusting portion 444 and the movable groove wall of the adjusting frame 441, a limiting strip 4411 is fixedly assembled on the movable groove wall of the adjusting frame 441, and a limiting slot 4441 matching the limiting strip 4411 is provided on the adjusting portion 444; based on the elastic force of the supporting spring 445, the adjusting portion 444 is pushed to slide on the limiting strip 4411 on the adjusting frame 441, and the adjusting portion 444 is used to drive the second composite roller 443 to compositely extrude the metal foil and the film, through this arrangement, the stability of the adjusting portion 444 and the second composite roller 443 during movement can be enhanced, and at the same time, the extrusion force of the second composite roller 443 on the metal foil and the film can be ensured to be uniform.

[0038] See also Figures 9 and 10 , a limiting groove 412 is also provided on the inner wall of the adjusting bracket 41, and the limiting groove 412 is located in the guide groove 411; the guide assembly 45 also includes guide members 454 fixedly assembled on both sides of the guide block 451, and the guide members 454 are located in the limiting groove 412, and a connecting spring 453 is connected between one side of the guide block 451 and the inner wall of the guide groove 411; the guide block 451 is driven to slide in the guide groove 411 by the guide rod 452, and the connecting spring 453 is squeezed by the guide block 451, and during the sliding process of the guide block 451 in the guide groove 411, the guide member 454 is driven to slide synchronously in the limiting groove 412, thereby improving the stability of the adjusting assembly 44 when moving, and enhancing the compounding and winding effect of the composite foil.

[0039] See also Figures 6 to 8 The jet mechanism 50 includes a fixed seat 51 fixedly assembled on the inner wall of the adjustment frame 441, and two jet assemblies 52 are symmetrically arranged on the fixed seat 51. A transmission assembly 53 is arranged between the two jet assemblies 52, and one side of the transmission assembly 53 is connected to the first composite roller 442; the arrangement of the jet assembly 52 can realize uninterrupted blowing and cleaning of the surface of the composite foil.

[0040] See also Figure 11 to Figure 12 The jet assembly 52 includes a jet shell 521 fixedly mounted on the fixing seat 51, an inner cavity is provided inside the jet shell 521, and an extrusion plate 522 is provided in the inner cavity, a one-way inflation valve 523 for automatically inflating the inner cavity of the jet shell 521 is fixedly mounted on the side wall of the jet shell 521, and a jet head 524 for jet cleaning is fixedly mounted on the side of the jet shell 521 facing the first composite roller 442; the extrusion plate 522 is driven to move in the jet shell 521 by driving the extrusion connecting rod 534, so that the extrusion plate 522 squeezes the airflow in the inner cavity of the jet shell 521, and ejects the airflow through the jet head 524, so that the jet head 524 ejects the airflow toward the surface of the composite foil material being composite-wound, and uses the ejected airflow to blow and clean the tiny dust and impurities attached to the surface of the composite foil material.

[0041] See also Figure 11 to Figure 12 The transmission assembly 53 includes a transmission connecting rod 531, one end of which is rotatably connected to the inner wall of the fixed seat 51 through a fixed bearing 532, and the other end of the transmission connecting rod 531 is fixedly connected to the first composite roller 442. A fixed rod 533 is fixedly installed on the extrusion plate 522, and an extrusion connecting rod 534 is movably connected between the transmission connecting rod 531 and the fixed rod 533; the transmission connecting rod 531 is driven to rotate synchronously while the first composite roller 442 rotates, and the extrusion connecting rod 534 is driven by the self-rotating transmission connecting rod 531 to drive the extrusion connecting rod 534 to drive the extrusion plate 522 to move in the jet shell 521, and the continuous rotation of the first composite roller 442 can make the extrusion connecting rod 534 drive the extrusion plate 522 to continuously reciprocate in the jet shell 521, thereby effectively ensuring that the jet head 524 continues to blow and clean during the composite operation.

[0042] See also Figure 1 , Fig.13The winding assembly 30 includes a winding frame 31 fixedly mounted on the machine base 10, a winding motor 32 fixedly mounted on the winding frame 31, a winding roller 33 rotatably mounted on the winding frame 31, the winding motor 32 is fixedly connected to the winding roller 33 by an output end, a protective baffle 34 and a winding core 35 are fixedly mounted on the winding roller 33, and the winding core 35 is used to wind and collect the composite foil; through program control, the winding motor 32 is started and generates kinetic energy, and its output end drives the winding roller 33 to start rotating, and drives the winding core 35 mounted on the winding roller 33 to rotate synchronously, and then uses the rotating winding core 35 to guide the composite foil to be gradually wound around its periphery, thereby performing the winding operation of the composite foil.

[0043] The specific usage and function of this embodiment are as follows: Working principle: When in use, first, the metal foil roll and the film roll are placed on the two rotating discs on the loading rack 21 respectively, and then the auxiliary roller 23 is used to accurately guide the metal foil and the film so that they move along a predetermined path. At this time, the two guide rollers 433 on the guide assembly 43 work together to effectively gather the metal foil and the film and guide them to pass between the first composite roller 442 and the second composite roller 443 on the adjustment assembly 44; in the adjustment assembly 44, based on the elastic force of the support spring 445, the adjustment part 444 is pushed to slide on the limit strip 4411 on the adjustment rack 441, and the adjustment part 44 is used to adjust the film. 4 drives the second composite roller 443 to compositely extrude the metal foil and the film to ensure that the metal foil and the film are closely attached to each other, thereby forming a composite foil, and the composite effect on the composite foil is strengthened by the two adjustment components 44; and the formed composite foil is then guided by the guide component 43 on the other side to the winding core 35 on the winding component 30. At this time, through program control, the winding motor 32 starts and generates kinetic energy, and its output end drives the winding roller 33 to start rotating, and drives the winding core 35 mounted on the winding roller 33 to rotate synchronously, and then uses the rotating winding core 35 to guide the composite foil to be gradually wound around its periphery, thereby performing the winding operation of the composite foil; During the composite winding process, when the slack of the composite foil needs to be adjusted, at this time, the servo motor 421 is started through program control, and the output end of the servo motor 421 is used to drive the adjustment disk 422 to rotate. During the rotation of the adjustment disk 422, the guide rod 452 is driven to move in the adjustment slot 423 on the adjustment disk 422, and the two adjustment components 44 are moved away from each other, so that the slack of the composite foil can be effectively adjusted, and the composite foil is pulled by the two adjustment components 44 that are away from each other, so that wrinkles in the composite foil can be avoided, and its tension is guaranteed to be in the best state. At the same time, it can also avoid that the composite foil is too loose, resulting in the composite foil after winding being not flat enough, and further improve the winding finishing effect of the composite foil. Through this setting, on the one hand, the uniformity and tightness of the composite layer of the composite foil can be improved, and on the other hand, it can avoid the composite foil from becoming loose after winding, resulting in the composite foil becoming loose, and other quality degradation problems; In the process of the adjusting disk 422 rotating to drive the guide rod 452 to move in the adjusting slide groove 423, the guide rod 452 is used to drive the guide block 451 to slide in the guide groove 411, and the guide block 451 is used to squeeze the connecting spring 453. In the process of the guide block 451 sliding in the guide groove 411, the guide member 454 is driven to slide synchronously in the limit groove 412, thereby improving the stability of the adjusting component 44 when moving, and enhancing the compounding and winding effect of the composite foil. In addition, during the composite winding process of the composite foil, the adjustment component 44 uses the first composite roller 442 and the second composite roller 443 to realize composite extrusion of the composite foil, and drives the first composite roller 442 to rotate based on the force when the composite foil moves, and the first composite roller 442 drives the transmission connecting rod 531 to rotate synchronously while rotating, and uses the self-rotating transmission connecting rod 531 to drive the extrusion connecting rod 534 to drive the extrusion plate 522 to move in the jet shell 521, so that the extrusion plate 522 squeezes the airflow in the cavity of the jet shell 521, and ejects the airflow through the jet head 524, so that the jet head 524 ejects the airflow toward the surface of the composite foil being composite-wound, and uses the ejected airflow to blow and clean the tiny dust and impurities attached to the surface of the composite foil; and through the continuous rotation of the first composite roller 442, the extrusion The connecting rod 534 drives the extrusion plate 522 to continuously move back and forth in the jet shell 521. When the extrusion plate 522 squeezes the airflow in the cavity of the jet shell 521, the jet head 524 is used to spray the airflow toward the surface of the composite foil material that is composite-wound for air blowing and cleaning. When the extrusion plate 522 moves in the opposite direction in the inner cavity of the jet shell 521, the one-way inflation valve 523 can be used to automatically inflate the inner cavity of the jet shell 521, effectively ensuring that the jet head 524 continues to blow and clean during the composite operation, so that as long as the composite foil material is composited, the jet head 524 on the jet assembly 52 can automatically perform air blowing and cleaning operations. This setting can prevent these pollutants from being embedded in the composite foil materials during the composite process to form defects, further improving the product quality and battery safety performance.

[0044] The preferred embodiments of the present invention disclosed above are only used to help illustrate the present invention. The preferred embodiments do not describe all the details in detail, nor do they limit the invention to the specific implementation methods described. Obviously, many modifications and changes can be made according to the content of this specification. This specification selects and specifically describes these embodiments in order to better explain the principles and practical applications of the present invention, so that those skilled in the art can understand and use the present invention well. The present invention is limited only by the claims and their full scope and equivalents.

Claims

1. A multilayer composite foil composite device for a negative electrode of a power battery, comprising a machine base (10), a loading assembly (20) arranged on the machine base (10) for loading metal foil and film, and a winding assembly (30) arranged on the machine base (10) for winding the composite foil, characterized in that: It also includes an adjustment mechanism (40) arranged on the machine base (10) for adjusting the slackness of the composite foil, and an air jet mechanism (50) arranged on the adjustment mechanism (40); The adjustment mechanism (40) comprises an adjustment bracket (41) fixedly mounted on a machine base (10); a driving assembly (42) and a guide assembly (45) are arranged on the adjustment bracket (41); the driving assembly (42) comprises a servo motor (421) fixedly mounted on an inner wall of the adjustment bracket (41); an output end of the servo motor (421) is fixedly connected to an adjustment disk (422); an adjustment slide groove (423) is provided on the adjustment disk (422); and two groups of symmetrically assembled guide assemblies (43) and an adjustment assembly (44) are arranged on the adjustment disk (422); A guide groove (411) is provided on the inner wall of the adjustment bracket (41), and the guide assembly (45) comprises a guide block (451) slidably mounted in the guide groove (411), a guide rod (452) is fixedly mounted on one side of the guide block (451), one end of the guide rod (452) passes through the adjustment slide groove (423) and is fixedly connected to the adjustment assembly (44), and the servo motor (421) drives the adjustment disk (422) to rotate by using the output end, so that the guide rod (452) can slide in the adjustment slide groove (423), and the guide rod (452) drives the two adjustment assemblies (44) to move away from each other, so as to adjust the slack of the composite foil material being composite-wound; The adjustment component (44) comprises an adjustment frame (441), wherein the outer wall of the adjustment frame (441) is fixedly connected to the guide rod (452), and a first composite roller (442) and a second composite roller (443) are arranged inside the adjustment frame (441); The jet mechanism (50) comprises a fixed seat (51) fixedly mounted on the inner wall of the adjustment frame (441), two jet assemblies (52) being symmetrically arranged on the fixed seat (51), a transmission assembly (53) being arranged between the two jet assemblies (52), and one side of the transmission assembly (53) being connected to the first composite roller (442).

2. The multi-layer composite equipment for negative electrode composite foil of power battery according to claim 1, characterized in that: The loading assembly (20) comprises a loading rack (21) fixedly mounted on a machine base (10), two loading trays (22) fixedly mounted on the loading rack (21), the two loading trays (22) being used to mount a metal foil roll and a film roll respectively, and an auxiliary roller (23) for composite guiding of the metal foil and the film being also fixedly mounted on the loading rack (21).

3. The multi-layer composite equipment for negative electrode composite foil of power battery according to claim 1, characterized in that: The guide assembly (43) comprises a guide frame (431) fixedly mounted on the adjustment disk (422), a movable shaft (432) fixedly mounted on the guide frame (431), and a guide roller (433) rotatably mounted on the movable shaft (432).

4. The multi-layer composite equipment for negative electrode composite foil of power battery according to claim 1, characterized in that: A composite channel for moving the composite foil is provided between the first composite roller (442) and the second composite roller (443).

5. The multi-layer composite equipment for negative electrode composite foil of power battery according to claim 4, characterized in that: The front and rear side walls of the adjustment frame (441) are provided with movable grooves, and an adjustment portion (444) is slidably mounted on the movable groove; one side of the adjustment portion (444) is connected to the second composite roller (443); a support spring (445) is fixedly connected between the upper side of the adjustment portion (444) and the movable groove wall of the adjustment frame (441); a limit strip (4411) is fixedly mounted on the movable groove wall of the adjustment frame (441); and a limit slot (4441) matching the limit strip (4411) is disposed on the adjustment portion (444).

6. The multi-layer composite equipment for negative electrode composite foil of power battery according to claim 1, characterized in that: A limiting groove (412) is also provided on the inner wall of the adjustment bracket (41), and the limiting groove (412) is located inside the guide groove (411); The guide assembly (45) further comprises guide members (454) fixedly mounted on both sides of the guide block (451), and the guide members (454) are located in the limiting groove (412), and a connecting spring (453) is provided between one side of the guide block (451) and the inner wall of the guide groove (411).

7. The multi-layer composite equipment for negative electrode composite foil of power battery according to claim 1, characterized in that: The jet assembly (52) comprises a jet shell (521) fixedly mounted on a fixing seat (51); an inner cavity is provided inside the jet shell (521), and an extrusion plate (522) is arranged in the inner cavity; a one-way inflation valve (523) for automatically inflating the inner cavity of the jet shell (521) is fixedly mounted on a side wall of the jet shell (521); and a jet head (524) for jet cleaning is fixedly mounted on a side of the jet shell (521) facing the first composite roller (442).

8. The multi-layer composite foil composite equipment for negative electrode of power battery according to claim 7, characterized in that: The transmission assembly (53) comprises a transmission connecting rod (531), one end of the transmission connecting rod (531) being rotatably connected to the inner wall of the fixed seat (51) via a fixed bearing (532), the other end of the transmission connecting rod (531) being fixedly connected to the first composite roller (442), a fixed rod (533) being fixedly mounted on the extrusion plate (522), and an extrusion connecting rod (534) being movably connected between the transmission connecting rod (531) and the fixed rod (533).

9. The multi-layer composite foil composite equipment for power battery negative electrode according to claim 1, characterized in that: The winding assembly (30) comprises a winding frame (31) fixedly mounted on a machine base (10), a winding motor (32) fixedly mounted on the winding frame (31), a winding roller (33) rotatably mounted on the winding frame (31), the winding motor (32) being fixedly connected to the winding roller (33) via an output end, a protective baffle (34) and a winding core (35) fixedly mounted on the winding roller (33), and the composite foil material is wound and collected via the winding core (35).

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