R-angle spraying mechanism for cylindrical lithium battery

By designing an R-angle spraying mechanism for cylindrical lithium batteries, spraying the R-angle position with a spray trolley for circular motion, the problem of excessive accumulation of ink at the R-angle is solved, and uniformity of spray thickness and cell quality are improved.

CN222998994UActive Publication Date: 2025-06-20DONGGUAN CLIMAX SEAL TECH
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Patent Information

Application Number
CN202421832867.9
Authority / Receiving Office
CN · China
Patent Type
Utility models(China)
Current Assignee / Owner
Filing Date
2024-07-30
Publication Date
2025-06-20
Estimated Expiration
2034-07-30

AI Technical Summary

Technical Problem

During the conventional spraying of cylindrical lithium batteries, the ink at the R-angle position is overstacked, resulting in uneven film thickness and even convex points, affecting the insulation performance of the battery cell.

Method used

A R-angle spraying mechanism for cylindrical lithium batteries is designed, and the R-angle position is sprayed using a spray trolley for circular motion to ensure uniform distribution of ink. The mechanism includes a frame, positioning fixture, ring track, circumferential slider and spray head, and precision spraying is achieved through the drive device.

Benefits of technology

It effectively avoids excessive accumulation of ink at the R angle, achieves uniformity of spray thickness at the R angle position, reduces the generation of defective products, and improves the spray appearance quality and pass rate of the battery cell.

✦ Generated by Eureka AI based on patent content.

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Abstract

The utility model discloses an R angle spraying mechanism of a cylindrical lithium battery, which comprises a rack, a positioning jig arranged in the middle of the rack and a circular track arranged on the periphery of the positioning jig, the positioning jig is used for placing the cylindrical lithium battery, and the positioning jig and the circular track are coaxial; a circumferential sliding block is installed on the circular ring rail in a sliding mode, the circumferential sliding block is provided with a machine base, and the machine frame is provided with a first driving device for driving the circumferential sliding block to move along the circular ring rail. A spray head is pivotally mounted on the machine base, and the machine base is provided with a second driving device for driving the spray head to swing; the specific spraying method comprises the steps that S1, the cylindrical lithium battery is installed on the positioning jig, and the cylindrical lithium battery and the positioning jig are coaxial; s2, the radian or angle or arc length of the R angle of the cylindrical lithium battery is obtained, data are sent to a second driving device, and a spray head is adjusted to a preset angle; s3, the first driving device drives the machine base to move along the circular track, and then circumferential spraying is conducted on the R angle; the spraying frequency is more than once.
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Description

Technical Field

[0001] The utility model relates to the field of cylindrical lithium battery spraying equipment, in particular to an R-angle spraying mechanism for cylindrical lithium batteries. Background Technique

[0002] During the conventional spraying process of the cylindrical lithium battery 100, the R-angle 101 position is spliced and covered by spraying the electrode column surface and the cylindrical surface of the battery cell.

[0003] However, during the spraying process, when spraying the electrode column surface and the cylindrical surface, the size of the sprayed pattern will be enlarged (that is, the density of the spraying holes is increased), resulting in excessive accumulation of ink at the R-angle position, resulting in uneven film thickness. In some areas, excessive accumulation even forms bumps, resulting in breakdown of the battery cell during the insulation test and forming defects. Content of the Utility Model

[0004] The main purpose of the utility model is to propose an R-angle spraying mechanism for cylindrical lithium batteries, aiming to use a spraying trolley to perform circular motion to spray the R-angle position, which can effectively avoid excessive accumulation of ink at the R-angle due to the problem of enlarged pattern, and make the spraying thickness at the R-angle position relatively uniform; it can also avoid the risk of inaccurate positioning caused by the size deviation of the battery cell itself, resulting in deviation of the spraying size. It can not only improve the spraying appearance of the battery cell, but also reduce the defective products generated due to the accumulation of ink at the R-angle, and improve the qualification rate.

[0005] To achieve the above object, the utility model proposes an R-angle spraying mechanism for cylindrical lithium batteries, including a frame, a positioning fixture arranged in the middle of the frame, and a circular ring track arranged on the outer periphery of the positioning fixture. The positioning fixture is used to place the cylindrical lithium battery, and the positioning fixture and the circular ring track are coaxial;

[0006] A circumferential slider is slidably installed on the circular ring track, a machine base is arranged on the circumferential slider, and the frame is provided with a first driving device for driving the circumferential slider to move along the circular ring track;

[0007] The machine base is pivotally installed with a spray head, and the machine base is provided with a second driving device for driving the spray head to swing;

[0008] Specific spraying method:

[0009] S1: Install the cylindrical lithium battery on the positioning fixture and make the cylindrical lithium battery and the positioning fixture coaxial;

[0010] S2: Obtain the radian or angle or arc length of the R-angle of the cylindrical lithium battery, and send the data to the second driving device, and the spray head is adjusted to a predetermined angle;

[0011] S3: The first driving device drives the machine base to move along the circular ring track, and then circumferentially sprays the R-angle;

[0012] The number of spraying times is greater than one.

[0013] In actual design, through the cooperation of the circular ring track, the second driving device and the second driving device, precise spraying of the R corner of the cylindrical lithium battery is realized, avoiding the problem that the ink thickness at the R corner is locally greater than or less than the predetermined value, making the ink layer thickness of the R corner and the ink layer on the outer peripheral wall of the cylindrical lithium battery remain basically the same, and the spraying uniformity is more stable;

[0014] Of course, in actual experiments, a structure with the positioning fixture rotating can also be adopted. However, affected by the self-weight of the ink droplets of the nozzle and the rotation degree of the cylindrical lithium battery, there will be a problem that the ink does not adhere, but the spraying area has rotated, resulting in local ink droplet stacking; therefore, the rotation speed of the positioning fixture is slow. Compared with the spraying efficiency of the positioning fixture, the structure of the present application can increase by 35% - 50% (for example, the spraying time of the structure with the positioning fixture rotating is 10s, while the present application only needs 5 - 7s).

[0015] In an actual nozzle, the nozzle is composed of a number of spray holes arranged vertically and horizontally. Therefore, the ink droplets are also arranged vertically and horizontally, and through multi-layer spraying, the ink layer reaches the predetermined coverage value and the predetermined shear force. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 is a three-dimensional schematic diagram of the present utility model;

[0017] Figure 2 is a cross-sectional view of the present utility model;

[0018] Figure 3 is a schematic diagram of the circular ring track;

[0019] Figure 4 is a schematic diagram of the positioning fixture;

[0020] Figure 5 is a schematic diagram of the lower-mounted first driving device;

[0021] Figure 6 is a schematic diagram of the upper-mounted first driving device.

[0022] In the figure,

[0023] 1 is the frame,

[0024] 2 is the positioning fixture, 20 is the vertical moving frame, 21 is the guide groove, 22 is the clamping part,

[0025] 3 is the circular ring track, 30 is the circumferential slider,

[0026] 4 is the machine base,

[0027] 5 is the first driving device,

[0028] 50 is a ring bearing, 51 is a gear ring, 52 is an external tooth, 53 is a first gear, 54 is a first rotating motor,

[0029] 6 is a ring gear, 61 is a tooth part, 62 is a second rotating motor, 63 is a driving gear,

[0030] 7 is the second driving device, 71 is a horizontal moving frame, 72 is a seat, 73 is a pivoting part,

[0031] 81 is an annular electrode part, 82 is an electrical connection part,

[0032] 9 is a nozzle. Specific embodiments

[0033] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings. Obviously, the described embodiments are only a 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 those of ordinary skill in the art without creative efforts belong to the protection scope of the present invention.

[0034] It should be noted that if there are directional indications (such as up, down, left, right, front, back, top, bottom, inside, outside, vertical, horizontal, longitudinal, counterclockwise, clockwise, circumferential, radial, axial...) involved in the embodiments of the present invention, then the directional indications are only used to explain the relative positional relationship and movement conditions between components in a certain specific posture (as shown in the accompanying drawings). If this specific posture changes, the directional indications will also change accordingly.

[0035] In addition, if there are descriptions such as "first" or "second" involved in the embodiments of the present invention, then the descriptions of "first" or "second" are only for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include at least one of such features. In addition, the technical solutions between various embodiments can be combined with each other, but it must be based on the fact that those of ordinary skill in the art can implement it. When the combination of technical solutions is contradictory or cannot be implemented, it should be considered that such a combination of technical solutions does not exist and is not within the protection scope required by the present invention.

[0036] As Figures 1 to 6 shown, a spray coating mechanism for the R corner of a cylindrical lithium battery includes a frame 1, a positioning fixture 2 provided in the middle of the frame 1, and a ring track 3 provided on the outer periphery of the positioning fixture 2. The positioning fixture 2 is used to place the cylindrical lithium battery, and the positioning fixture 2 and the ring track 3 are coaxial.

[0037] A circumferential slider 30 is slidably mounted on the circular ring track 3, a machine base 4 is provided on the circumferential slider 30, and a first driving device 5 for driving the circumferential slider 30 to move along the circular ring track 3 is provided on the frame 1;

[0038] A spray head 9 is pivotally mounted on the machine base 4, and a second driving device 7 for driving the spray head 9 to swing is provided on the machine base 4;

[0039] Specific spraying method:

[0040] S1: Install the cylindrical lithium battery on the positioning fixture 2 and make the cylindrical lithium battery and the positioning fixture 2 coaxial;

[0041] S2: Obtain the radian, angle or arc length of the R angle of the cylindrical lithium battery, and send the data to the second driving device 7, and the spray head 9 is adjusted to a predetermined angle;

[0042] S3: The first driving device 5 drives the machine base 4 to move along the circular ring track 3, and then circumferentially sprays the R angle;

[0043] The number of spraying times is greater than one.

[0044] In actual design, through the cooperation of the circular ring track 3, the second driving device 7 and the second driving device 7, precise spraying of the R angle of the cylindrical lithium battery is realized, avoiding the problem that the ink thickness at the R angle is locally greater than or less than the predetermined value, making the ink layer thickness of the R angle and the outer peripheral wall of the cylindrical lithium battery basically consistent, and the spraying uniformity is more stable;

[0045] Of course, in actual tests, a structure in which the positioning fixture 2 rotates can also be adopted. However, due to the influence of the self-weight of the ink droplets of the spray head 9 and the rotation degree of the cylindrical lithium battery, there will be a problem that the ink does not adhere, but the spraying area has rotated, resulting in local ink droplet stacking; therefore, the rotation speed of the positioning fixture 2 is slow. Compared with the spraying efficiency of the positioning fixture 2 of the present application, the present application can increase by 35% - 50% (for example, the spraying time of the structure in which the positioning fixture 2 rotates is 10 s, while the present application only needs 5 - 7 s).

[0046] In an actual spray head 9, the spray head 9 is composed of a number of spray holes arranged vertically and horizontally. Therefore, the ink droplets are also arranged vertically and horizontally, and through multi-layer spraying, the ink layer reaches a predetermined coverage value and a predetermined shear force.

[0047] Specifically, two circular ring tracks 3 are provided and are arranged at intervals, and the first driving device 5 is arranged between the two circular ring tracks 3, thereby maintaining a predetermined guidance and ensuring smooth sliding.

[0048] In the embodiment of the present utility model, the first driving device 5 includes two annular bearings 50 arranged at intervals, a gear ring 51 pivotally installed between the two annular bearings 50. The gear ring 51 is provided with external teeth 52 (which can provide a more stable driving force). The upper wall of the gear ring 51 is connected to the machine base 4. The frame 1 is provided with a first rotating motor 54, and the driving end of the first rotating motor 54 is provided with a first gear 53 that cooperates with the external teeth 52. When the first rotating motor 54 rotates, it can drive the gear ring 51 to rotate. Its structure is simple and the cost is relatively low.

[0049] Specifically, the first driving device 5 includes a ring gear 6 fixedly arranged on the frame 1. The ring gear 6 is provided with tooth portions 61, and the tooth portions 61 are arranged on the inner side and / or the outer side of the ring gear 6. The machine base 4 is provided with a second rotating motor 62, and the second rotating motor 62 is provided with a driving gear 63 that meshes with the tooth portions 61. Of course, annular bearings 50 can also be arranged between the ring gears 6 to ensure its stable rotation and rotation accuracy.

[0050] In the embodiment of the present utility model, the bottom wall of the frame 1 is provided with two annular electrode portions 81 arranged at intervals. The second rotating motor 62 is provided with an electrical connection portion 82 that cooperates with the annular electrode portions 81. The annular electrode portions 81 are in a closed-loop circular shape, thereby realizing the movement of the machine base 4 along the circular ring track 3, ensuring both stable movement and avoiding the problem of messy wire distribution.

[0051] Specifically, the machine base 4 is provided with a horizontal moving frame 71. The horizontal moving frame 71 includes a horizontal guide rail arranged on the machine base 4, a horizontal slider slidably installed on the horizontal guide rail, and a horizontal lead screw pair for driving the horizontal slider to move.

[0052] In the embodiment of the present utility model, the horizontal slider is provided with a saddle 72. The saddle 72 is provided with two pivot portions 73 arranged at intervals. The nozzle 9 is pivotally installed between the pivot portions 73;

[0053] Control the front and back movement of the saddle 72 to enable the loading and unloading of the cylindrical lithium battery, that is, form an avoidance position to facilitate the loading and unloading of the cylindrical lithium battery.

[0054] Specifically, the second driving device 7 is a second rotating motor 62 arranged on one of the pivot portions 73. The second rotating motor 62 can drive the nozzle 9 to swing.

[0055] In the embodiment of the present utility model, the positioning fixture 2 is arranged on the vertical moving frame 20. The vertical moving frame 20 includes a telescopic motor arranged on the frame 1, a guide sleeve arranged on the frame 1, and a guide rod that cooperates with the guide sleeve. The positioning fixture 2 is arranged at the upper end of the guide rod, realizing the relative dimension adjustment of the cylindrical lithium battery. That is, in addition to the inclination, the distance between the R angle and the nozzle 9 also affects the spraying stability.

[0056] Specifically, the positioning fixture 2 includes a base, guide grooves 21 spaced circumferentially along the base, and a clamping portion 22 slidably mounted in the guide grooves 21. The clamping portion 22 is driven to displace by a clamping motor, where the clamping motor is a prior art technology, thereby realizing the clamping and fixing of the cylindrical lithium battery.

[0057] A second vertical moving frame is further provided between the horizontal moving frame and the seat 72 to facilitate the adjustment of the relative position of the nozzle 9.

[0058] The first driving device can also adopt a circular ring electrode, but its cost is relatively high.

[0059] The above are only the preferred embodiments of the present invention, and do not limit the patent scope of the present invention. Any equivalent structural transformation made under the inventive concept of the present invention by using the content of the specification and drawings of the present invention, or any direct / indirect application in other related technical fields, is included in the patent protection scope of the present invention.

Claims

1. A R-angle spraying mechanism for a cylindrical lithium battery, characterized in that: It includes a frame, a positioning fixture arranged in the middle of the frame, and a circular track arranged on the periphery of the positioning fixture, wherein the positioning fixture is used to place cylindrical lithium batteries, and the positioning fixture and the circular track are coaxial; The circular track is slidably mounted with a circumferential slider, the circumferential slider is provided with a machine base, and the frame is provided with a first driving device that drives the circumferential slider to move along the circular track; The machine base is pivotally mounted with a spray head, and the machine base is provided with a second driving device that drives the spray head to swing.

2. The R-angle spraying mechanism for a cylindrical lithium battery according to claim 1, characterized in that: There are two circular tracks, which are arranged at intervals, and the first driving device is arranged between the two circular tracks.

3. The R-angle spraying mechanism for a cylindrical lithium battery according to claim 1, characterized in that: The first driving device includes two annular bearings arranged at intervals, and a gear ring pivotally mounted between the two annular bearings, the gear ring is provided with external teeth, the upper wall of the gear ring is connected to the machine base, the frame is provided with a first rotating motor, and the driving end of the first rotating motor is provided with a first gear matching the external teeth, and when the first rotating motor rotates, the gear ring can be driven to rotate.

4. The R-angle spraying mechanism for a cylindrical lithium battery according to claim 1, characterized in that: The first driving device comprises a ring gear fixed to the frame, the ring gear is provided with a tooth portion, the tooth portion is provided on the inner side and / or outer side of the gear, the frame is provided with a second rotating motor, and the second rotating motor is provided with a driving gear meshing with the tooth portion.

5. The R-angle spraying mechanism for a cylindrical lithium battery as claimed in claim 4, characterized in that: The bottom wall of the frame is provided with two annular electrode parts which are spaced apart from each other. The annular electrode parts are in a closed-loop circular shape. The second rotating motor is provided with an electrical connection part which matches with the annular electrode parts.

6. The R-angle spraying mechanism for a cylindrical lithium battery according to claim 1, characterized in that: The machine base is provided with a horizontal moving frame, and the horizontal moving frame comprises a horizontal guide rail arranged on the machine base, a horizontal sliding block slidably mounted on the horizontal guide rail, and a horizontal screw rod pair driving the horizontal sliding block to move.

7. The R-angle spraying mechanism for a cylindrical lithium battery as claimed in claim 6, characterized in that: The horizontal sliding block is provided with a seat, the seat is provided with two pivoting parts arranged at intervals, and the spray head is pivotally installed between the pivoting parts.

8. The R-angle spraying mechanism for a cylindrical lithium battery as claimed in claim 7, characterized in that: The second driving device is a second rotating motor disposed on one side of the pivoting portion, and the second rotating motor can drive the spray head to swing.

9. The R-angle spraying mechanism for a cylindrical lithium battery according to claim 1, characterized in that: The positioning fixture is arranged on a vertical movable frame, which comprises a telescopic motor arranged on the frame, a guide sleeve arranged on the frame and a guide rod matched with the guide sleeve, and the positioning fixture is arranged on the upper end of the guide rod.

10. The R-angle spraying mechanism for a cylindrical lithium battery according to claim 1, characterized in that: The positioning fixture comprises a base, guide grooves spaced apart along the circumference of the base, and a clamping part slidably mounted on the guide grooves, and the clamping part is driven to move by a clamping motor.