Heat shrink tubing equipment for cylindrical batteries with protective plates

Abstract

The present invention provides a heat shrink tubing device for cylindrical batteries with protective plates. The key technical features of the device are: a conveying device for stepping and positioning the battery, a tape-applying device for covering the protective plate with adhesive tape and affixing it to the battery surface, a sleeve device for sleeve-applying the heat shrink tubing onto the battery, a pre-forming device for pre-shrinking the ends of the heat shrink tubing to position the battery, and a heating device for heating the battery as a whole after pre-forming. The tape-applying device ensures that the protective plate is accurately fixed to the battery surface by the adhesive tape and facilitates the subsequent insertion of the heat shrink tubing. The pre-forming device allows the battery to be precisely positioned axially within the heat shrink tubing and fixes the battery's position within the heat shrink tubing, thereby ensuring the quality of subsequent complete heat shrink wrapping. The device can realize automated production and significantly improve production efficiency and product quality.

Description

Technical Field

[0001] The present invention relates to the technical field of battery processing equipment, and in particular to a heat shrink tubing device for cylindrical batteries with protective plates. Background Art

[0002] Existing cylindrical lithium batteries (18650 lithium batteries) are usually equipped with a protective plate to prevent damage to the battery due to overcharging, overcurrent, etc., and a heat shrink tubing is also required on the outside to improve safety.

[0003] Because the protective plate of this type of battery is connected to the battery via wires, it is in an automatically oscillating state. When applying the heat shrink tubing, safety considerations require strict requirements for the fixed position of the protective plate and the location of the heat shrink tubing wrapped around the battery ends. Furthermore, the small diameter of this type of cylindrical battery results in a small internal space in the tubing. Traditional heat shrink tubing equipment struggles to meet these requirements, while manual operation is inefficient and produces inconsistent quality. Therefore, specialized equipment is needed to achieve automated production. Summary of the Invention

[0004] The purpose of the present invention is to provide an automated device that can cover cylindrical batteries with protective plates with heat shrink tubing.

[0005] To achieve the above object, the technical solution adopted by the present invention is:

[0006] A heat shrink tubing device for cylindrical batteries with protective plates, comprising

[0007] A conveying device for conveying and positioning batteries in a stepwise manner, comprising two parallel supporting rods, a lifting rod arranged parallel to the two supporting rods, a lifting device for driving the lifting rods to rise and fall, and a pneumatic stepping mechanism for driving the lifting rods to move back and forth in a stepwise manner along their length; the supporting rods and the lifting rods each have a concave arc-shaped positioning groove corresponding to each work station and adapted to the curvature of the battery;

[0008] A tape-applying device is used to apply tape to the protective plate and affix it to the battery surface; the tape-applying device is also provided with a first clamping claw cylinder for clamping and positioning the protective plate, and the first clamping claw cylinder is provided at the free end of the battery protective plate;

[0009] The sleeve device is used to sleeve the heat shrink tube on the battery, including a sleeve reel for feeding the material, a sleeve supporting device for stretching the sleeve and sleeved it into the battery, and a sleeve cutting assembly for cutting the heat shrink tube after the sleeve is completed; the sleeve supporting device includes a circular support rod coaxially arranged at one end of the battery, two groups of first clamping rollers for rolling and clamping the support rod distributed at intervals along the length direction of the support rod, and two groups of second clamping rollers for rolling and clamping the support rod distributed at intervals, the axial directions of the first clamping rollers and the second clamping rollers are perpendicular to each other, and the first clamping rollers and the second clamping rollers have at least one group of driving rollers; wherein, corresponding to each side roller shaft of each group of the first clamping rollers, the support rod is provided with an installation groove along the axial direction, two groups of rollers are rotatably installed in the installation groove by means of a pin shaft, and the two groups of rollers are spaced along the length direction of the support rod, and the roller shaft of each side of the first clamping rollers is installed between the two groups of rollers;

[0010] A pre-forming device for pre-shrinking the ends of the heat shrink tubing to position the battery, comprising a driven rod coaxially rotatably mounted on one end of the battery, an active rod coaxially mounted on the other end of the battery, a motor for driving the active rod to rotate about its axis, a linear device for driving the active rod and / or the driven rod to reciprocate axially, and a heating assembly proximate to the ends of the battery;

[0011] and a heating device for heating the entire battery after pre-forming so that the heat shrink tubing shrinks and covers the outside of the battery.

[0012] A preferred solution is that the adhesive tape device includes a supply tape reel, a positioning clamp for the adhesive tape to pass through, a movable clamp assembly for clamping the tail end of the adhesive tape and dragging it horizontally, a paper cutting assembly for cutting the adhesive tape, and a adhesive tape robot for adsorbing the adhesive tape and applying it to the battery surface.

[0013] In a preferred embodiment, the glue-applying robot includes a horizontal mounting arm, a rotary cylinder driving the mounting arm to rotate horizontally around a midpoint, two sets of vertical cylinders fixed at both ends of the mounting arm, and a vacuum suction cup assembly driven by the vertical cylinders.

[0014] A preferred solution is that a glue paper pressing device is further provided behind the glue paper sticking device, and the glue paper pressing device includes a first downward pressing cylinder and a first pressing block driven by the first downward pressing cylinder, and the bottom surface of the first pressing block has an arc groove with a cross-section adapted to the curvature of the battery, and the top of the arc groove is also provided with a square groove for accommodating a protective plate.

[0015] In a preferred embodiment, the sleeve device further includes a baffle provided at the other end of the battery relative to the support rod, and a sleeve pressing device provided above the battery, wherein the sleeve pressing device includes a second downward pressing cylinder and a second pressing block driven by the second downward pressing cylinder.

[0016] A preferred solution is that a material transfer robot is provided between the pre-forming device and the heating device, and the material transfer robot includes a clamping cylinder for clamping the battery, and an XZ-axis translation platform for driving the clamping cylinder to lift and translate; the heating component is installed on both sides of the clamping cylinder.

[0017] The beneficial effects of the present invention are as follows: the conveying device feeds materials in steps through the lifting rod, and a positioning groove is provided, so that the battery maintains the positioning direction unchanged during the transmission along the work station; the adhesive tape device and the first clamping cylinder can ensure that the protective plate is accurately fixed to the battery surface by the adhesive tape, and facilitate the subsequent insertion of the heat shrink sleeve; the heat shrink sleeve is then sleeved on the outside of the battery through the sleeve device, and the sleeve device can fully expand the heat shrink sleeve without deformation, thereby ensuring the smoothness of insertion; finally, the pre-forming device makes the axial position of the battery in the heat shrink sleeve accurate, and after the two ends of the heat shrink sleeve are preheated and deformed, the position of the battery in the heat shrink sleeve can be fixed, thereby ensuring the quality of subsequent complete heat shrink coating; the equipment can realize automated production and significantly improve production efficiency and product quality. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0019] Figure 1 Schematic diagram of the structure of the battery to be processed;

[0020] Figure 2 Schematic diagram of the overall structure of the device in the embodiment;

[0021] Figure 3 Schematic diagram of the structure of the conveying device in the embodiment;

[0022] Figure 4 Schematic diagram of the structure of the casing device in the embodiment;

[0023] Figure 5 Schematic diagram of the structure of the support rod in the embodiment;

[0024] Figure 6 Schematic diagram of the structure of the pre-forming device and the material transfer robot in the embodiment;

[0025] Figure 7 Schematic diagram of the structure of the adhesive tape device in the embodiment;

[0026] Figure 8 Schematic diagram of the structure of the glue paper laminating device in the embodiment. DETAILED DESCRIPTION

[0027] The present invention will be further described below with reference to the accompanying drawings:

[0028] It should be noted that the words indicating directions in this application document, such as top surface, bottom surface, vertical direction, etc., are only for the convenience of a more intuitive description of the structure in combination with the drawings, and are not intended to limit the product structure.

[0029] refer to Figures 1 to 8 The device for wrapping heat shrink tubing around cylindrical batteries with protective plates shown in FIG. 1 includes a conveying device 1 for conveying and positioning batteries 100 in a stepwise manner, comprising two parallel supporting rods 11, a lifting rod 12 disposed parallel to and between the two supporting rods 11, a lifting device 13 for driving the lifting rods 12 up and down, and a pneumatic stepping mechanism 14 for driving the lifting rods 12 to move back and forth along their length. The supporting rods 11 and the lifting rod 12 each have a concave arc-shaped positioning groove 15 corresponding to each work station and adapted to the curvature of the battery 100.

[0030] The adhesive tape applying device 2 is used to apply adhesive tape to the protective plate 100a and affix it to the surface of the battery 100. The adhesive tape applying device 2 is also provided with a first clamping claw cylinder 7121 for clamping and positioning the protective plate 100a. The first clamping claw cylinder 7121 is provided at the free end of the protective plate 100a of the battery 100.

[0031] The sleeve device 3 is used to sleeve the heat shrink tube on the battery 100, including a sleeve reel 31 for feeding the material, a sleeve support device 32 for stretching the sleeve and inserting it into the battery 100, and a tube cutting assembly 33 for cutting the heat shrink tube after the sleeve is completed; the sleeve support device 32 includes a circular support rod 321 coaxially arranged at one end of the battery 100, two sets of first clamping rollers 322 distributed at intervals along the length direction of the support rod 321 for rolling and clamping the support rod 321, and two sets of second clamping rollers 323 distributed at intervals for rolling and clamping the support rod 321, the first clamping roller 32 2 and the axial direction of the second clamping roller pair 323 are mutually perpendicular, and the first clamping roller pair 322 and the second clamping roller pair 323 have at least one set of driving rollers; wherein, corresponding to each side roller shaft of each set of the first clamping roller pair 322, the support rod 321 is provided with a mounting groove 3211 along the axial direction, and two sets of rollers 3212 are rotatably mounted in the mounting groove 3211 via a pin, and the two sets of rollers 3212 are spaced apart along the length direction of the support rod 321, and each side roller shaft of the first clamping roller pair 322 is mounted between the two sets of rollers 3212;

[0032] The pre-forming device 4 is used to pre-shrink the ends of the heat shrink tubing to position the battery 100, and includes a driven rod 41 coaxially rotatably mounted on one end of the battery 100, an active rod 42 coaxially mounted on the other end of the battery 100, a motor 43 for driving the active rod 42 to rotate about its axis, a linear device 44 for driving the active rod 42 and the driven rod 41 to reciprocate along the axial direction, and a heating assembly 45 close to the ends of the battery 100;

[0033] The heating device 5 is used to heat the entire battery 100 after pre-forming so that the heat shrink tubing shrinks and covers the outside of the battery 100 .

[0034] During operation, the battery 100 to be processed is placed horizontally into the positioning groove 15 of the conveyor 1, and the protective plate 100a and its wires 100b are placed on the upper surface of the battery 100 along the axis of the battery 100, with the free end of the wire 100b facing outward. The lifting device 13 drives the lifting rod 12 to lift, so that the battery 100 is separated from the support rod 11. Then, the pneumatic stepping mechanism 14 drives the lifting rod 12 to step one station, and then the lifting rod 12 is lowered, so that the battery 100 falls into the next station of the support rod 11. The lifting rod 12 returns to its original position and the feeding is continued in this stepping manner. The adhesive tape device 2 applies adhesive tape to the battery 100 one by one, and the first clamping claw cylinder 7121 is used to fix the tail end of the protective plate 100a and the wire 100b to correct the position of the protective plate 100a and prevent the protective plate 100a from shifting when the adhesive tape is applied. After entering the heat shrink tubing application station, the heat shrink tubing is unwound from the tubing reel 31 and passed through the support rod 321 to expand it. The first clamping roller pair 322 then drives the heat shrink tubing forward to be inserted into the inner side of the battery 100. After reaching the set position, the tube cutting assembly 33 cuts the heat shrink tubing. The support rod 321 is completely positioned by the first clamping roller pair 322 and the second clamping roller pair 323, preventing it from swinging. The support rod 321 is in contact with the first clamping roller pair 322 via two sets of rollers 3212, preventing the support rod 321 from axial movement. When the battery 100 enters the station of the pre-forming device 4, the linear device 44 drives the active rod 42 and / or the driven rod 41 to axially approach and push the battery 100, so that the other end of the battery 100 abuts against the driven rod 41, thereby determining the axial position of the battery 100 within the heat shrink tubing. The heating component 45 then heats both ends of the battery 100, while the motor 43 drives the battery 100 to rotate about its axis, causing the heat shrink tubing to shrink and deform at the end of the battery 100, and the battery 100 cannot move axially within the heat shrink tubing. Finally, the battery 100 is sent to the heating component 45 for uniform heating, so that the heat shrink tubing completely shrinks and covers the surface of the battery 100, completing the processing.

[0035] The conveying device 1 feeds the material in steps through the lifting rod 12, and is provided with a positioning groove 15, so that the battery 100 maintains the positioning direction unchanged during the transmission along the work station. The adhesive tape device 2 and the first clamping cylinder 7121 can ensure that the protective plate 100a is accurately fixed to the surface of the battery 100 by the adhesive tape, and facilitate the subsequent insertion of the heat shrink sleeve. The heat shrink sleeve is then sleeved on the outside of the battery 100 through the sleeve device 3. The sleeve device 3 can fully expand the heat shrink sleeve without deformation, ensuring the smoothness of insertion. Finally, the pre-forming device 4 is used to ensure that the axial position of the battery 100 in the heat shrink sleeve is accurate, and after the two ends of the heat shrink sleeve are preheated and deformed, the position of the battery 100 in the heat shrink sleeve can be fixed, which can ensure the quality of subsequent complete heat shrink wrapping; the equipment can realize automated production and significantly improve production efficiency and product quality.

[0036] A preferred embodiment of the present invention relates to a tape-applying device 2 comprising a tape reel 22 for feeding material, a positioning clamp 23 for the tape to pass through, a movable clamp assembly 24 for gripping the tail end of the tape and dragging it horizontally, a paper cutting assembly 25 for cutting the tape, and a tape-applying robot 26 for adsorbing the tape and applying it to the surface of the battery 100. During operation, the tape reel 22 unloads material, the tape passes through the positioning clamp 23, the tail end is gripped by the movable clamp assembly 24 and dragged horizontally to a set position, the tape-applying robot 26 then adsorbs the back of the tape, the paper cutting assembly 25 cuts the tape, and finally the tape-applying robot 26 applies the tape to the surface of the battery 100 at a set position. The tape-applying device 2 can continuously feed material and has high production efficiency. The functions of the tape-applying device 2 are relatively simple, namely, taking and applying the tape. Many mature tape-applying technical solutions exist in the prior art, which will not be elaborated here.

[0037] In a preferred embodiment, the adhesive application robot 26 comprises a horizontal mounting arm 261, a rotary cylinder 264 that drives the mounting arm 261 to rotate horizontally about its midpoint, two sets of vertical cylinders 262 fixed to either end of the mounting arm 261, and a vacuum suction cup assembly 263 driven by the vertical cylinders 262. The two sets of vacuum suction cup assemblies 263, which rotate and operate alternately, can further improve production efficiency.

[0038] In a preferred embodiment, a paper pressing device 6 is further provided behind the adhesive tape applying device 2 of this embodiment. The paper pressing device 6 comprises a first downward-pressing cylinder 61 and a first pressing block 62 driven by the first downward-pressing cylinder 61. The bottom surface of the first pressing block 62 has an arcuate groove 621 whose cross-section matches the curvature of the battery 100. The top of the arcuate groove 621 also has a square groove 622 for accommodating the protective plate 100a. The paper pressing device 6 is used to press the adhesive tape until it is completely in contact with the surface of the battery 100, while the square groove 622 prevents damage to the protective plate 100a during downward pressure.

[0039] In a preferred embodiment, the sleeve device 3 of this embodiment further includes a baffle 34 disposed at the other end of the battery 100 relative to the support rod 321, and a sleeve pressing device 35 disposed above the battery 100. The sleeve pressing device 35 includes a second downward-pressing cylinder 351 and a second pressing block 352 driven by the second downward-pressing cylinder 351. The baffle 34 can be used to axially limit the battery 100 when the heat shrink sleeve is applied, preventing the battery 100 from being pushed axially during application. The sleeve pressing device is used to position the sleeve when cutting it, preventing displacement of the sleeve and battery 100, thereby ensuring the accuracy of the sleeve length.

[0040] In a preferred embodiment, a material transfer robot 7 is further provided between the pre-forming device 4 and the heating device 5 of this embodiment. The material transfer robot 7 includes a gripper cylinder 71 for gripping the battery 100 and an XZ-axis translation platform 72 for driving the gripper cylinder 71 to elevate and translate. The heating assembly 45 is mounted on both sides of the gripper cylinder 71. The gripper cylinder 71 is used to deliver the pre-formed battery 100 into the heating device 5, while the heating assembly 45 is mounted on the material transfer robot 7 to drive the heating assembly 45 to move, so that the heating assembly 45 is preheated only when it stops at the pre-forming station, thereby avoiding inaccurate relative positioning of the heat shrink tubing and the battery 100 due to premature heating.

[0041] The above description does not limit the technical scope of the present invention. Any modifications, equivalent changes and modifications made to the above embodiments based on the technical essence of the present invention are still within the scope of the technical solution of the present invention.

Claims

1. A heat shrink tubing device for cylindrical batteries with protective plates, characterized by: include A conveying device for conveying and positioning batteries in a stepwise manner, comprising two parallel supporting rods, a lifting rod arranged parallel to the two supporting rods, a lifting device for driving the lifting rods to rise and fall, and a pneumatic stepping mechanism for driving the lifting rods to move back and forth in a stepwise manner along their length; the supporting rods and the lifting rods each have a concave arc-shaped positioning groove corresponding to each work station and adapted to the curvature of the battery; A tape-applying device is used to apply tape to the protective plate and affix it to the battery surface; the tape-applying device is also provided with a first clamping claw cylinder for clamping and positioning the protective plate, and the first clamping claw cylinder is provided at the free end of the battery protective plate; The sleeve device is used to sleeve the heat shrink tube on the battery, including a sleeve reel for feeding the material, a sleeve supporting device for stretching the sleeve and sleeved it into the battery, and a sleeve cutting assembly for cutting the heat shrink tube after the sleeve is completed; the sleeve supporting device includes a circular support rod coaxially arranged at one end of the battery, two groups of first clamping rollers for rolling and clamping the support rod distributed at intervals along the length direction of the support rod, and two groups of second clamping rollers for rolling and clamping the support rod distributed at intervals, the axial directions of the first clamping rollers and the second clamping rollers are perpendicular to each other, and the first clamping rollers and the second clamping rollers have at least one group of driving rollers; wherein, corresponding to each side roller shaft of each group of the first clamping rollers, the support rod is provided with an installation groove along the axial direction, two groups of rollers are rotatably installed in the installation groove by means of a pin shaft, and the two groups of rollers are spaced along the length direction of the support rod, and the roller shaft of each side of the first clamping rollers is installed between the two groups of rollers; A pre-forming device for pre-shrinking the ends of the heat shrink tubing to position the battery, comprising a driven rod coaxially rotatably mounted on one end of the battery, an active rod coaxially mounted on the other end of the battery, a motor for driving the active rod to rotate about its axis, a linear device for driving the active rod and / or the driven rod to reciprocate axially, and a heating assembly proximate to the ends of the battery; and a heating device for heating the entire battery after pre-forming so that the heat shrink tubing shrinks and covers the outside of the battery.

2. The heat shrink tubing device for cylindrical batteries with protective plates according to claim 1, characterized in that: The adhesive tape device includes a supply tape reel, a positioning clamp for the adhesive tape to pass through, a movable clamp assembly for clamping the tail end of the adhesive tape and dragging it horizontally, a paper cutting assembly for cutting the adhesive tape, and a adhesive tape robot for adsorbing the adhesive tape and applying it to the battery surface.

3. The heat shrink tubing device for cylindrical batteries with protective plates according to claim 2, characterized in that: The glue-applying robot includes a horizontal mounting arm, a rotary cylinder driving the mounting arm to rotate horizontally around a midpoint, two sets of vertical cylinders fixed at both ends of the mounting arm, and a vacuum suction cup assembly driven by the vertical cylinders.

4. The heat shrink tubing device for cylindrical batteries with protective plates according to claim 2, characterized in that: A glue paper pressing device is also provided behind the glue paper sticking device, and the glue paper pressing device includes a first downward pressing cylinder and a first pressing block driven by the first downward pressing cylinder. The bottom surface of the first pressing block has an arc groove with a cross-section adapted to the curvature of the battery, and the top of the arc groove is also provided with a square groove for accommodating a protective plate.

5. The heat shrink tubing device for cylindrical batteries with protective plates according to claim 1, characterized in that: The sleeve device also includes a baffle provided at the other end of the battery relative to the support rod, and a sleeve pressing device provided above the battery. The sleeve pressing device includes a second downward pressing cylinder and a second pressing block driven by the second downward pressing cylinder.

6. The heat shrink tubing device for cylindrical batteries with protective plates according to claim 1, characterized in that: A material transfer robot is also provided between the pre-forming device and the heating device. The material transfer robot includes a second clamping cylinder for clamping the battery and an XZ-axis translation platform for driving the second clamping cylinder to lift and translate. The heating component is installed on both sides of the clamping cylinder.

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