Soft package lithium ion battery pole group surface hot melt adhesive pasting device

Abstract

The utility model belongs to the technical field of lithium ion batteries, and particularly relates to a surface hot melt adhesive pasting device for a soft package lithium ion battery pole group. Comprising a hot melt adhesive pasting mechanism, an adhesive pulling clamping jaw, a hot melt adhesive clamping clamping jaw, a ceramic passing roller, a tension control roller, a digital display position adjusting hand wheel, an adhesive pasting mechanism base, an adhesive pasting mechanism mounting plate, a hot melt adhesive unwinding roll, an adhesive tape unwinding motor, a damping controller and a release paper winding roll. According to the device, the pasting accuracy and stability of the hot melt adhesive tape on the surface of the soft package lithium ion battery pole group are remarkably improved. The three-channel adhesive suction plate sequentially blows air to the air channels according to the adhesive tape pasting length, the undesirable situation that the hot melting adhesive tape is wrinkled during adhesive tape pasting can be effectively reduced, it is ensured that the adhesive tape is tightly and flatly pasted, and the pasting quality is improved.

Description

Hot melt adhesive bonding device for soft-pack lithium-ion battery electrode assembly Technical Field

[0001] This utility model belongs to the field of lithium-ion battery technology, specifically relating to a hot melt adhesive bonding device for the electrode assembly surface of a soft-pack lithium-ion battery. Background Technology

[0002] In the manufacturing of pouch lithium-ion batteries, the bonding effect between the electrode assembly and other components has a significant impact on battery performance and safety. Currently, traditional bonding methods have many drawbacks:

[0003] 1. Adhesive bonding is a commonly used method, but its long curing time significantly slows down the production pace and reduces production efficiency. During the evaporation process, adhesives produce harmful substances, polluting the production environment and threatening the health of operators. Furthermore, it is difficult to achieve uniform adhesive application, resulting in inconsistent bonding strength between the electrode assembly and other components, affecting the overall quality of the battery.

[0004] 2. Ordinary adhesive tape is also used in the production of soft-pack lithium-ion batteries. However, its bonding strength is not high enough. During long-term use, changes in environmental factors such as temperature and humidity, as well as stress generated by internal chemical reactions, can easily lead to delamination, causing the electrode assembly to separate from other components, seriously threatening the safety and stability of the battery. Ordinary adhesive tape also has limited temperature resistance. During battery charging and discharging, heat is generated. As the temperature rises, the bonding performance of ordinary adhesive tape further decreases, making it difficult to guarantee the reliability of the battery structure.

[0005] 3. Hot melt adhesive tape, with its outstanding advantages such as rapid bonding, high bonding strength, and solvent-free evaporation, has become an ideal choice for bonding electrode packs in pouch lithium-ion batteries. However, existing bonding equipment cannot fully utilize these advantages. Existing equipment struggles to achieve precise positioning of the hot melt adhesive tape on the surface of the pouch lithium-ion battery electrode pack, leading to tape placement deviations that affect the overall performance and appearance quality of the battery. Furthermore, stable and precise control of the conveying speed and length of the hot melt adhesive tape is difficult to achieve during transport, often resulting in problems such as uneven tape delivery and inconsistent lengths. This limits the application of hot melt adhesive tape in pouch lithium-ion battery production, failing to meet the demands of large-scale, high-quality production. Summary of the Invention

[0006] The purpose of this invention is to provide a hot melt adhesive bonding device for the surface of a soft-pack lithium-ion battery electrode assembly, thereby solving the problems existing in the prior art.

[0007] To achieve the above objectives, this utility model provides the following technical solution: a hot melt adhesive tape pasting device for the surface of a soft-pack lithium-ion battery electrode assembly, characterized in that it includes a hot melt adhesive pasting mechanism, adhesive pulling claws, hot melt adhesive clamping claws, a ceramic feed roller, a tension control roller, a digital display position adjustment handwheel, an adhesive pasting mechanism base, an adhesive pasting mechanism mounting plate, a hot melt adhesive unloading mechanism, an adhesive tape unloading motor, a damping controller, and a release paper winding mechanism;

[0008] The adhesive applicator base serves as the installation reference for the entire device. The adhesive applicator mounting plate is mounted on the adhesive applicator base. The hot melt adhesive unwinding roll, tape unwinding motor, damping controller, and release paper winding are arranged on the adhesive applicator mounting plate. The ceramic guide roller and tension control roller are arranged on the adhesive applicator mounting plate and located on the glue dispensing path of the hot melt adhesive unwinding roll. The digital display position adjustment handwheel is used to adjust the position of the adhesive applicator base in the equipment.

[0009] The adhesive pulling claw and the hot melt adhesive clamping claw are mounted on the adhesive applicator mounting plate. The adhesive pulling claw is used to contact the inner surface of the hot melt adhesive tape and complete the adhesive pulling and clamping actions. The hot melt adhesive clamping claw is used to clamp the hot melt adhesive tape simultaneously with the adhesive pulling claw after the adhesive pulling claw has reached its position, and cooperates with the cutter to cut the hot melt adhesive tape.

[0010] The hot melt adhesive applicator includes an adhesive pressing roller lifting cylinder, an adhesive pressing roller mounting plate, an adhesive pressing roller, an adhesive suction plate, an adhesive suction plate mounting plate, a robotic arm lifting module, a robotic arm lateral movement servo motor, a lateral movement module, and a robotic arm lifting servo motor. The adhesive suction plate is a three-channel adhesive suction plate, including a middle suction hole, a head suction hole, and a tail suction hole, which are respectively connected to the three channels. The adhesive suction plate is mounted on the adhesive suction plate mounting plate. The adhesive suction plate mounting plate moves up and down through the robotic arm lifting module. The robotic arm lateral movement servo motor drives the lateral movement module, causing the hot melt adhesive applicator to move along the Y-axis. The robotic arm lifting servo motor is used to realize the Z-axis lifting action of the hot melt adhesive applicator. The adhesive pressing roller lifting cylinder is connected to the adhesive pressing roller mounting plate and controls the adhesive pressing roller to perform lifting and lowering movements to complete the pressing of the hot melt adhesive tape.

[0011] Preferably, the inner surface of the adhesive-pulling claw that contacts the hot melt adhesive tape has a raised structure, and the surface of the adhesive-pulling claw is coated with a Teflon coating.

[0012] Preferably, the inner surface of the hot melt adhesive clamping claw has a raised structure.

[0013] Preferably, the surface of the ceramic roller is made of ceramic material to reduce the adhesion of hot melt adhesive tape to the ceramic roller due to excessive viscosity.

[0014] Preferably, the tension control roller controls the tension of the hot melt adhesive tape through a Z-direction telescopic cylinder to ensure that the hot melt adhesive tape is taut during the adhesive preparation process.

[0015] Preferably, the hot melt adhesive roll is fed using a three-jaw chuck structure, and a spring device is used to tension the material ring so that the material ring is tightly attached to the reference surface, so as to ensure that the tape does not deviate during its travel.

[0016] Preferably, the tape unwinding motor is a servo motor that controls the unwinding speed, and the tape unwinding motor and the damping controller synchronously control and provide feedback on the unwinding.

[0017] Preferably, the release paper is fixed by a three-jaw chuck and wound up by a damper and a winding motor.

[0018] Preferably, the adhesive pressing roller is made of 45# steel and has a rubber layer on its surface to prevent scratching the surface of the battery cell during the adhesive pressing process.

[0019] The beneficial effects of this invention are as follows: This device significantly improves the accuracy and stability of hot melt adhesive tape application on the surface of soft-pack lithium-ion battery electrode packs. The three-channel suction plate sequentially blows air into the air channels according to the tape's application length, effectively reducing wrinkles in the hot melt adhesive tape during application, ensuring a tight and flat adhesion, and improving the quality of the application. The adhesive-pulling jaws and hot melt adhesive clamping jaws work together, in conjunction with a cutter to precisely cut the tape. Furthermore, the special raised structure and Teflon coating design of the adhesive-pulling jaws prevent the tape from sticking together during clamping, ensuring the stability of the tape delivery and adhesive preparation processes, and allowing the hot melt adhesive tape to be accurately positioned on the battery electrode pack surface.

[0020] This device significantly improves the production efficiency of pouch lithium-ion batteries. The tape unwinding motor uses a servo motor, synchronized with a damping controller to ensure stable and uniform tape delivery, preventing unwinding issues from affecting bonding efficiency. Multiple power components, including the adhesive pressing roller lifting cylinder and the robotic arm lifting module, work together to achieve rapid and continuous tape application, reducing the time required for applying tape to individual battery electrode groups and meeting the demands of large-scale production. Simultaneously, a digital display position adjustment handwheel allows for easy adjustment of the tape's position in the X-axis of the electrode group, ensuring the tape dimensions meet process requirements, reducing rework due to dimensional deviations, and further improving production efficiency. Attached Figure Description

[0021] Figure 1 is a schematic diagram of the structure of this utility model;

[0022] Figure 2 is a schematic diagram of the hot melt adhesive applicator in this utility model.

[0023] Figure 3 is a schematic diagram of the adhesive suction plate in this utility model. Detailed Implementation

[0024] It should be noted that, without conflict, the embodiments and features in the embodiments of this utility model can be combined with each other.

[0025] In the description of this utility model, it should be understood that the terms "center," "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicating orientation or positional relationships based on the orientation or positional relationships shown in the accompanying drawings, are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation on this utility model. Furthermore, the terms "first," "second," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, features defined with "first," "second," etc., may explicitly or implicitly include one or more of that feature. In the description of this utility model, unless otherwise stated, "a plurality of" means two or more.

[0026] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," "fixed connection," and "fixed connection" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0027] The specific embodiments of this utility model are described in detail below with reference to the accompanying drawings and preferred embodiments.

[0028] As shown in Figure 1, a device for applying hot melt adhesive tape to the surface of a soft-pack lithium-ion battery electrode assembly includes a hot melt adhesive applicator 1, an adhesive-pulling gripper 2, a hot melt adhesive clamping gripper 3, a ceramic roller 4, a tension control roller 5, a digital display position adjustment handwheel 6, an adhesive applicator base 7, an adhesive applicator mounting plate 8, a hot melt adhesive unwinding roll 9, an adhesive tape unwinding motor 10, a damping controller 11, and a release paper winding mechanism 12. The adhesive-pulling gripper 2 has a raised structure on the inner surface of the hot melt adhesive tape, and its surface is coated with Teflon to prevent the tape from sticking during clamping. The inner surface of the clamping gripper 3 has raised structures that cooperate with the adhesive-pulling gripper 2 to clamp and cut the tape. The surface of the ceramic roller 4 is made of ceramic material to reduce the adhesion of the hot melt adhesive tape due to excessive viscosity. The tension control roller 5 controls the tension of the hot melt adhesive tape through a Z-direction telescopic cylinder. The digital display position adjustment handwheel 6 is used to adjust the position of the device in the equipment to adjust the position of the tape in the X direction of the electrode assembly. The adhesive applicator base 7 serves as the installation reference for the entire mechanism, featuring high parallelism and precise positioning holes. The hot melt adhesive unwinding roll 9 employs a three-jaw chuck structure, utilizing a spring device to tension the material ring. The tape unwinding motor 10 is a servo motor, controlling the unwinding speed. The damping controller 11 provides tension and controls the unwinding speed. The release paper winding 12 secures the release paper via a three-jaw chuck, and winding is controlled by a damper and a winding motor.

[0029] The adhesive applicator base serves as the installation reference for the entire device. The adhesive applicator mounting plate is mounted on the adhesive applicator base. The hot melt adhesive unwinding roll, tape unwinding motor, damping controller, and release paper winding are arranged on the adhesive applicator mounting plate. The ceramic guide roller and tension control roller are arranged on the adhesive applicator mounting plate and located on the glue dispensing path of the hot melt adhesive unwinding roll. The digital display position adjustment handwheel is used to adjust the position of the adhesive applicator base in the equipment.

[0030] The adhesive pulling claw and the hot melt adhesive clamping claw are mounted on the adhesive applicator mounting plate. The adhesive pulling claw is used to contact the inner surface of the hot melt adhesive tape and complete the adhesive pulling and clamping actions. The hot melt adhesive clamping claw is used to clamp the hot melt adhesive tape simultaneously with the adhesive pulling claw after the adhesive pulling claw has reached its position, and cooperates with the cutter to cut the hot melt adhesive tape.

[0031] As shown in Figure 2, the hot melt adhesive application mechanism 1 includes an adhesive pressing roller lifting cylinder 11, an adhesive pressing roller mounting plate 12, an adhesive pressing roller 13, an adhesive suction plate 14, an adhesive suction plate mounting plate 15, a robotic arm lifting module 16, a robotic arm lateral movement servo motor 17, a lateral movement module 18, and a robotic arm lifting servo motor 19. The adhesive suction plate is a three-channel adhesive suction plate, as shown in Figure 3, including a middle suction hole 141, a head suction hole 142, and a tail suction hole 143, which are respectively connected to three channels. A suction plate is mounted on a suction plate mounting plate, which moves up and down via a robotic arm lifting module. A lateral movement servo motor drives the lateral movement module, causing the hot melt adhesive applicator to move along the Y-axis. The robotic arm lifting servo motor is used to realize the Z-axis lifting action of the hot melt adhesive applicator. A pressing roller lifting cylinder is connected to the pressing roller mounting plate, controlling the pressing roller to move up and down to complete the pressing of the hot melt adhesive tape.

[0032] The tape unwinding motor 10 serves as the drive source, and under the control of the servo system, it precisely adjusts the unwinding speed according to the production process requirements. The damping controller 11 provides stable resistance during the unwinding process, ensuring that the hot melt adhesive tape maintains appropriate tension during unwinding and avoiding instability caused by tape slack or excessive tension. The three-jaw chuck structure and spring device of the hot melt adhesive unwinding roll 9 work together to ensure that the material ring is tightly attached to the reference surface, ensuring that the tape does not shift during unwinding and stably providing tape for subsequent bonding processes.

[0033] With its special raised structure and Teflon coating, the adhesive-pulling claw 2 can firmly grip the hot melt adhesive tape while preventing it from sticking to the claw when it contacts the inner surface of the tape. After the adhesive-pulling claw 2 pulls the tape to the designated position, the hot melt adhesive clamping claw 3 activates, and both claws clamp the tape simultaneously. At this point, the cutter cuts the tape, completing the adhesive preparation, ready for bonding.

[0034] The three-channel suction plate 14 blows air sequentially through the middle suction hole 141, the head suction hole 142, and the tail suction hole 143 according to the tape's application length, reducing wrinkles in the hot melt adhesive tape during application. During tape collection, the suction plate mounting plate 15 descends under the drive of the robotic arm lifting module 16, absorbing the cut hot melt adhesive tape. Subsequently, the robotic arm's lateral movement servo motor 17 drives the lateral movement module 18, moving the tape application mechanism along the Y-axis to precisely position the absorbed tape above the battery electrode assembly's application location. Next, the robotic arm's lifting servo motor 19 drives the tape application mechanism downwards, while the tape application pressing roller lifting cylinder 11 lowers the tape application pressing roller 13, tightly adhering the hot melt adhesive tape to the battery electrode assembly surface. After application, the release paper winding 12, controlled by a damper and a winding motor, winds up the used release paper for subsequent processing.

[0035] For those skilled in the art, several improvements and modifications can be made without departing from the principle of this utility model, and these improvements and modifications should also be considered within the scope of protection of this utility model.

Claims

1. A hot melt adhesive bonding device for the electrode assembly surface of a soft-pack lithium-ion battery, characterized in that, The device includes a hot melt adhesive applicator, adhesive-pulling jaws, hot melt adhesive clamping jaws, a ceramic guide roller, a tension control roller, a digital position adjustment handwheel, an adhesive applicator base, an adhesive applicator mounting plate, a hot melt adhesive unloading roll, an adhesive tape unwinding motor, a damping controller, and a release paper rewinder. The adhesive applicator base serves as the mounting reference for the entire device. The adhesive applicator mounting plate is mounted on the adhesive applicator base. The hot melt adhesive unloading roll, adhesive tape unwinding motor, damping controller, and release paper rewinder are located on the adhesive applicator mounting plate. The ceramic guide roller and tension control roller are located on the adhesive applicator mounting plate and positioned along the adhesive path of the hot melt adhesive unloading roll. The digital position adjustment handwheel is used to adjust the position of the adhesive applicator base within the device. The adhesive-pulling jaws and hot melt adhesive clamping jaws are located on the adhesive applicator mounting plate. The adhesive-pulling jaws contact the inner surface of the hot melt adhesive tape to complete the pulling and clamping actions. The hot melt adhesive clamping jaws are used to engage the adhesive when the adhesive-pulling jaws are in position. The hot melt adhesive tape is then clamped simultaneously with the adhesive-pulling gripper and cut by the cutter. The hot melt adhesive applicator includes an adhesive-pressing roller lifting cylinder, a pressing roller mounting plate, an adhesive-pressing roller, a suction plate, a suction plate mounting plate, a robotic arm lifting module, a robotic arm lateral movement servo motor, a lateral movement module, and a robotic arm lifting servo motor. The suction plate is a three-channel suction plate, including a middle suction hole, a head suction hole, and a tail suction hole, which are connected to three channels respectively. The suction plate is mounted on the suction plate mounting plate. The suction plate mounting plate moves up and down through the robotic arm lifting module. The robotic arm lateral movement servo motor drives the lateral movement module, causing the hot melt adhesive applicator to move along the Y-axis. The robotic arm lifting servo motor is used to realize the Z-axis lifting action of the hot melt adhesive applicator. The adhesive-pressing roller lifting cylinder is connected to the pressing roller mounting plate and controls the adhesive-pressing roller to perform lifting and lowering movements to complete the pressing of the hot melt adhesive tape.

2. The hot melt adhesive bonding device for the electrode assembly of a soft-pack lithium-ion battery according to claim 1, characterized in that, The inner surface of the adhesive-pulling claw that contacts the hot melt adhesive tape has a raised structure, and the surface of the adhesive-pulling claw is coated with a Teflon coating.

3. The hot melt adhesive bonding device for the electrode assembly surface of a soft-pack lithium-ion battery according to claim 1, characterized in that, The inner surface of the hot melt adhesive clamping claw is provided with a raised structure.

4. The hot melt adhesive bonding device for the electrode assembly surface of a soft-pack lithium-ion battery according to claim 1, characterized in that, The surface of the ceramic roller is made of ceramic material.

5. The hot melt adhesive bonding device for the electrode assembly surface of a soft-pack lithium-ion battery according to claim 1, characterized in that, The tension control roller controls the tension of the hot melt adhesive tape through a Z-direction telescopic cylinder to ensure that the hot melt adhesive tape is taut during the adhesive preparation process.

6. The hot melt adhesive bonding device for the electrode assembly of a soft-pack lithium-ion battery according to claim 1, characterized in that, The hot melt adhesive roll is fed using a three-jaw chuck structure.

7. The hot melt adhesive bonding device for the electrode assembly surface of a soft-pack lithium-ion battery according to claim 1, characterized in that, The tape unwinding motor uses a servo motor to control the unwinding speed, and the tape unwinding motor and the damping controller synchronously control and provide feedback on the unwinding.

8. The hot melt adhesive bonding device for the electrode assembly surface of a soft-pack lithium-ion battery according to claim 1, characterized in that, The release paper is fixed by a three-jaw chuck and wound up by a damper and a winding motor.

9. The hot melt adhesive bonding device for the electrode assembly of a soft-pack lithium-ion battery according to claim 1, characterized in that, The adhesive pressing roller is made of 45# steel shaft, and a rubber layer is attached to the surface of the shaft.

Images