Equipment for detecting appearance and size of cylindrical battery cell

Abstract

The utility model provides a device for detecting the appearance and size of a cylindrical battery cell, and the device comprises a central positioning mechanism which is used for positioning the central point of the battery cell on the same straight line; the lifting mechanism comprises a lifting cylinder and a rotatable driving wheel; the clamping mechanism comprises a clamping air cylinder and two rotatable clamping wheel sets; the lifting air cylinder is used for driving the driving wheel and the clamping mechanism to move up and down, and the clamping air cylinder is used for driving the two clamping wheel sets to move transversely; the two clamping wheel sets are used for clamping a battery cell, and the driving wheel is used for driving the battery cell to rotate; and the detection positioning mechanism comprises a transmitting optical fiber and a receiving optical fiber which are parallel to each other, and the position of the anode tab or the cathode tab of the battery cell sequentially passing through the transmitting optical fiber and the receiving optical fiber is defined as an initial detection position. According to the equipment, the battery cell can be automatically, efficiently and conveniently detected, the yield of the battery cell is effectively guaranteed, and damage or pollution to the battery cell is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of battery core detection, in particular to a device for detecting the appearance and size of a cylindrical battery core. Background Art

[0002] Benefiting from the development of new energy vehicles, the demand for power lithium batteries has increased year by year, and power lithium batteries have become a concentrated area of ​​demand growth in the lithium battery industry. In the production process of lithium batteries, the appearance defects and size detection of lithium battery cells are an indispensable step. The size of the battery cell is related to the qualified rate of the assembled battery, and the appearance defects have a huge impact on safety.

[0003] After the cylindrical battery is wound and formed, it is necessary to inspect the welding quality, size, pole piece and diaphragm defects of the battery cell. In the prior art, in the lithium battery inspection process, most processes are manual inspections. Since manual inspection is a subjective activity, there are individual differences between inspectors and environmental differences, etc., which often brings great uncertainty to the battery appearance inspection results. The battery yield cannot be effectively guaranteed. At the same time, the large number of employees increases the production cost of the enterprise, and the battery is easily damaged or contaminated during the manual placement process. If some residual pollutants on the surface of some batteries are not cleaned during the production process, it will also lead to deviations in the inspection results. Summary of the invention

[0004] The purpose of the utility model is to provide a device for detecting the appearance and size of cylindrical battery cells, which can realize automatic, efficient and convenient detection of battery cells, effectively ensure the yield rate of battery cells, and reduce damage or pollution to battery cells.

[0005] To this end, the utility model provides a device for detecting the appearance and size of cylindrical battery cells, including a frame, on which are provided: a conveying mechanism for conveying the battery cells; a center positioning mechanism for positioning the center points of the battery cells on the same straight line; a lifting mechanism, including a lifting cylinder and a rotatable driving wheel; a clamping mechanism, including a clamping cylinder and two rotatable clamping wheel groups; the lifting cylinder is used to drive the driving wheel and the clamping mechanism to move up and down, and the clamping cylinder is used to drive the two clamping wheel groups to move laterally; the two clamping wheel groups are used to clamp the battery cells, and the driving wheel is used to drive the battery cells to rotate; a detection and positioning mechanism, including parallel transmitting optical fibers and receiving optical fibers, defining the position of the anode ear or cathode ear of the battery cell after passing through the transmitting optical fiber and the receiving optical fiber in turn as the initial detection position; and a detection mechanism, which is used to detect the battery cells.

[0006] Preferably, the conveying structure is provided with a positioning seat that cooperates with the battery cell.

[0007] Preferably, the lifting cylinder is provided with a servo motor, the servo motor is connected with a driving shaft, and the driving shaft is connected to the driving wheel; the servo motor is used to drive the driving shaft to rotate, and the driving shaft is used to drive the driving wheel to rotate.

[0008] Preferably, the number of the center positioning mechanisms is two, and the two center positioning mechanisms are symmetrically arranged on both sides of the frame.

[0009] Preferably, the center positioning mechanism comprises a photoelectric sensor, and the photoelectric sensor is used to sense the end face of the battery cell.

[0010] Preferably, the center positioning mechanism comprises a positioning cylinder, on which a laterally movable positioning column is provided, and the positioning column is used to interfere with the battery cells so that the center points of the battery cells are located on the same straight line.

[0011] Preferably, the two clamping wheel groups are symmetrically arranged on both sides of the battery cell, and the two clamping wheel groups are moved toward and away from each other through the clamping cylinder.

[0012] Preferably, the transmitting optical fiber and the receiving optical fiber are parallel to the end face of the battery cell.

[0013] Preferably, the distance between the transmitting optical fiber and the receiving optical fiber is 0.5-2 mm.

[0014] Preferably, the detection system comprises a shooting camera, and the shooting camera is used to shoot the surface of the battery cell.

[0015] Compared with the prior art, the advantages and positive effects of the utility model are as follows: the utility model provides a device for detecting the appearance and size of cylindrical battery cells, including a frame, on which are provided: a conveying mechanism for conveying the battery cells; a center positioning mechanism for positioning the center points of the battery cells on the same straight line; a lifting mechanism, including a lifting cylinder and a rotatable driving wheel; a clamping mechanism, including a clamping cylinder and two rotatable clamping wheel groups; the lifting cylinder is used to drive the driving wheel and the clamping mechanism to move up and down, and the clamping cylinder is used to drive the two clamping wheel groups to move laterally; the two clamping wheel groups are used to clamp the battery cells, and the driving wheel is used to drive the battery cells to rotate; a detection and positioning mechanism, including parallel transmitting optical fibers and receiving optical fibers, defining the position of the anode ear or cathode ear of the battery cell after passing through the transmitting optical fiber and the receiving optical fiber in turn as the initial detection position; a detection mechanism, which is used to detect the battery cells. The utility model of the device for detecting the appearance and size of cylindrical battery cells can realize automatic, efficient and convenient detection of battery cells, and can effectively ensure the yield rate and detection accuracy of battery cells. The detection device of the utility model does not require manual detection, and can improve the accuracy and yield rate of battery cell detection, and can avoid manual contact with battery cells, thereby reducing damage or pollution to battery cells.

[0016] After reading the specific embodiments of the present invention in conjunction with the accompanying drawings, other features and advantages of the present invention will become more clear. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a structural schematic diagram of an embodiment of the utility model of a device for detecting the appearance and size of a cylindrical battery cell;

[0018] Figure 2 yes Figure 1 Enlarged view of part A;

[0019] Figure 3 It is a partial structural schematic diagram of an embodiment of the utility model of a device for detecting the appearance and size of a cylindrical battery cell;

[0020] Figure 4 It is a partial structural schematic diagram of an embodiment of the utility model of a device for detecting the appearance and size of a cylindrical battery cell;

[0021] Figure 5 It is a partial structural schematic diagram of an embodiment of the utility model of a device for detecting the appearance and size of a cylindrical battery cell;

[0022] Figure 6 It is a partial structural schematic diagram of an embodiment of the utility model of a device for detecting the appearance and size of a cylindrical battery cell;

[0023] Figure 7 It is a partial structural schematic diagram of an embodiment of the utility model of a device for detecting the appearance and size of a cylindrical battery cell;

[0024] Figure 8 It is a partial structural schematic diagram of an embodiment of the utility model of a device for detecting the appearance and size of a cylindrical battery cell;

[0025] Fig. 9 The utility model is a detection flow chart of an embodiment of the device for detecting the appearance and size of cylindrical battery cells. DETAILED DESCRIPTION

[0026] In order to make the purpose, technical solutions and advantages of the present invention more clearly understood, the present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments.

[0027] like Figure 1-Figure 9 As shown, the device for detecting the appearance and size of cylindrical battery cells of the utility model includes a frame 10, on which are provided: a conveying mechanism 11 for conveying the battery cell 100; a center positioning mechanism for positioning the center point of the battery cell 100 on the same straight line; a lifting mechanism, including a lifting cylinder 21 and a rotatable driving wheel 22; a clamping mechanism, including a clamping cylinder 31 and two rotatable clamping wheel groups; the lifting cylinder 21 is used to drive the driving wheel 22 and the clamping mechanism to move up and down, and the clamping cylinder 31 is used to drive the two clamping wheel groups to move horizontally; the two clamping wheel groups are used to clamp the battery cell 100, and the driving wheel 22 is used to drive the battery cell 100 to rotate; a detection and positioning mechanism, including parallel transmitting optical fibers 41 and receiving optical fibers 42, defining the position of the anode ear 101 or cathode ear 102 of the battery cell 100 after passing through the transmitting optical fiber 41 and the receiving optical fiber 42 in turn as the initial detection position; and a detection mechanism, which is used to detect the battery cell 100.

[0028] The device for detecting the appearance and size of cylindrical battery cells of the utility model can realize automatic, efficient and convenient detection of the battery cells 100, and can effectively ensure the yield rate and detection accuracy of the battery cells 100. The detection device of the utility model does not require manual detection, and can improve the detection accuracy and yield rate of the battery cells 100, and can avoid manual contact with the battery cells, thereby reducing damage or contamination to the battery cells 100.

[0029] The conveying structure 11 is provided with a positioning seat 12 that matches the battery cell 100. The positioning seat 12 is provided with an arc-shaped groove. The battery cell 100 is matched in the arc-shaped groove, which can play a role in positioning the battery cell 100. When the conveying mechanism 11 conveys and moves the battery cell 100, the battery cell 100 is placed in the arc-shaped groove of the positioning seat 12 and moves simultaneously with the movement of the positioning seat 12, so that the battery cell 100 can be conveyed and moved stably and effectively.

[0030] There are two center positioning mechanisms, which are symmetrically arranged on both sides of the frame 10. The battery cell 100 moves with the positioning seat 12. When the battery cell 100 and the positioning seat 12 move between the two center positioning mechanisms, the two center positioning mechanisms can position the battery cell 100 respectively, so that the battery cell 100 moves laterally on the positioning seat 12, thereby ensuring that the center points of the battery cell 100 are located on the same straight line, so as to ensure that the detection position of the battery cell 100 is consistent, thereby improving the detection accuracy.

[0031] The center positioning mechanism includes a photoelectric sensor 61 and a positioning cylinder 62 . The photoelectric sensor 61 is used to sense the end surface of the battery cell 100 .

[0032] A positioning column 63 that can move laterally is disposed on the positioning cylinder 62 . The positioning column 63 is used to abut against the end surface of the battery cell 100 so that the center points of the battery cell 100 are located on the same straight line.

[0033] The photoelectric sensor 61 sends the sensed signal to the control system, and the control system controls the positioning cylinder 62 to move, so that the positioning column 63 can be extended and retracted. The positioning column 63 can resist the end face of the battery cell 100, so that the battery cell 100 moves axially until the center point of the battery cell 100 moves to the predetermined position.

[0034] The predetermined position may be determined according to specific conditions, as long as all the battery cells 100 can be moved to the same predetermined position so that the center points of all the battery cells 100 are located on the same straight line.

[0035] A servo motor 51 is disposed on the frame 11 , and a driving shaft 52 is connected to the servo motor 51 , and the driving shaft 52 is connected to the driving wheel 22 ; the servo motor 51 is used to drive the driving shaft 52 to rotate, and the driving shaft 52 is used to drive the driving wheel 22 to rotate.

[0036] In this embodiment, the output shaft of the servo motor 51 and the driving shaft 52 are connected by a gear belt, and the servo motor 51 can drive the output shaft to rotate, thereby driving the driving shaft 52 to rotate. The driving shaft 52 and the driving wheel 22 are connected by a connecting shaft, and the axial direction of the connecting shaft is parallel to the axial direction of the driving shaft 52 and the driving wheel 22, and the driving wheel 22 can be driven to rotate by the rotation of the driving shaft 52.

[0037] The two clamping wheel groups are symmetrically arranged on both sides of the battery cell 100 , and the two clamping wheel groups are moved toward and away from each other through the clamping cylinder 31 , so that the two clamping wheel groups can clamp and separate the battery cell 100 .

[0038] Each clamping wheel set includes two clamping wheels 32 , and both clamping wheels 32 can contact the surface of the battery cell 100 to achieve stable and effective clamping support for the battery cell 100 , so that the battery cell 100 can rotate stably and effectively.

[0039] When the battery cell 100 moves to the bottom of the driving wheel 22 after center positioning, the lifting cylinder 21 drives the driving wheel 22, the servo motor 51, the drive shaft 52 and the clamping mechanism to move downward as a whole until the surface of the driving wheel 22 contacts the surface of the battery cell 100; the clamping cylinder 31 drives the two clamping wheel groups to move toward each other, so that the two clamping wheel groups move to the two sides of the battery cell 100 and contact the battery cell 100, so that the battery cell 100 can be clamped; the lifting cylinder 21 drives the driving wheel 22, the servo motor 51, the drive shaft 52 and the clamping mechanism to move upward as a whole, so that the battery cell 100 is separated from the positioning seat 12. The servo motor 51 drives the drive shaft 52 and the driving wheel 22 to rotate, and the rotation of the driving wheel 22 can drive the battery cell 100 and the driven wheel 32 to rotate; during the rotation of the battery cell 100, the battery cell 100 is photographed and detected.

[0040] If the battery cell 100 passes the inspection, the lifting cylinder 21 drives the driving wheel 22, the servo motor 51, the drive shaft 52 and the clamping mechanism to move downward as a whole until the battery cell 100 drops onto the positioning seat 12; the clamping cylinder 31 drives the two clamping wheel groups to move in opposite directions, so that the two clamping wheel groups are away from the battery cell 100 and no longer clamp the battery cell 100;

[0041] The lifting cylinder 21 drives the driving wheel 22 , the servo motor 51 , the driving shaft 52 and the clamping mechanism to move upward as a whole; the conveying structure 11 drives the qualified battery cells 100 and the positioning seat 12 to be conveyed and moved on the frame 11 .

[0042] If the battery cell 100 fails the inspection, the lifting cylinder 21 drives the driving wheel 22, the servo motor 51, the drive shaft 52 and the clamping mechanism to move downward as a whole until the battery cell 100 drops onto the positioning seat 12; the clamping cylinder 31 drives the two clamping wheel groups to move in opposite directions, so that the two clamping wheel groups are away from the battery cell 100 and no longer clamp the battery cell 100;

[0043] The lifting cylinder 21 drives the driving wheel 22, the servo motor 51, the drive shaft 52 and the clamping mechanism to move upward as a whole; the extending cylinder (not shown in the figure) drives the clamping claws to clamp the unqualified battery cells 100 and move them into the waste frame.

[0044] The detection system includes an anode camera 71 and a cathode camera 72, and the anode camera 71 and the cathode camera 72 are used to photograph the surface of the battery cell 100. The anode camera 71 photographs and samples the side of the battery cell 100 close to the anode tab 101, and the cathode camera 72 photographs and samples the side of the battery cell 100 close to the cathode tab 102. The battery cell 100 is cylindrical, and during the rotation of the battery cell 100, the anode camera 71 and the cathode camera 72 can take complete photographs and samples of the surface of the battery cell 100, and can perform complete and comprehensive detection and analysis of the surface scratches, wrinkles, diaphragm damage, termination glue circumference, cell diameter, tab bending and size of the battery cell 100.

[0045] The initial position of the photographing detection of the battery cell 100 can be positioned by the transmitting optical fiber 41 and the receiving optical fiber 42, so that the battery cell 100 can be located at the same initial position of the photographing detection, so as to improve the accuracy of the photographing detection.

[0046] The process of locating the initial position of the battery cell 100 for photographic detection by the transmitting optical fiber 41 and the receiving optical fiber 42 includes: during the rotation of the battery cell 100, the anode ear 101 or the cathode ear 102 of the battery cell 100 will pass through the transmitting optical fiber 41 and the receiving optical fiber 42 in sequence; the position after the anode ear 101 or the cathode ear 102 passes through the transmitting optical fiber 41 and then passes through the receiving optical fiber 42 is defined as the initial position for photographic detection, and the shooting camera starts photographing and sampling the battery cell 100 from this initial position for photographic detection.

[0047] The anode tab 101 and the cathode tab 102 extend out of the two end faces of the battery cell 100, respectively, and the anode tab 101 and the cathode tab 102 are perpendicular to the end faces of the battery cell 100. The transmitting optical fiber 41 and the receiving optical fiber 42 are parallel, and the transmitting optical fiber 41 and the receiving optical fiber 42 are parallel to the end faces of the battery cell 100, thereby ensuring that the anode tab 101 and / or the cathode tab 102 can pass through the transmitting optical fiber 41 and the receiving optical fiber 42.

[0048] If the distance between the transmitting optical fiber 41 and the receiving optical fiber 42 is too far, the interval time for the anode pole ear and / or the cathode pole ear to pass through the transmitting optical fiber 41 and the receiving optical fiber 42 in turn is too long, and the battery cell 100 cannot be accurately photographed and detected to locate the initial position, and the camera cannot accurately photograph and sample the battery cell 100; if the distance between the transmitting optical fiber 41 and the receiving optical fiber 42 is too close, the transmitting optical fiber 41 and the receiving optical fiber 42 will interfere with each other and positioning cannot be achieved; therefore, the distance between the transmitting optical fiber 41 and the receiving optical fiber 42 should be minimized while ensuring that the transmitting optical fiber 41 and the receiving optical fiber 42 do not interfere with each other.

[0049] In the present application, the distance L between the transmitting optical fiber 41 and the receiving optical fiber 42 is 0.5-2 mm, and L is preferably 1 mm, which can accurately locate the initial position of the battery cell 100 by taking a photo to detect the location.

[0050] like Figure 6 As shown, the position of the anode tab 101 of the battery cell after passing through the transmitting optical fiber 41 and the receiving optical fiber 42 in sequence is defined as the initial detection position, and this position is the initial shooting position of the anode shooting camera 71. In this embodiment, the extension direction of the anode tab 101 is perpendicular to the direction of the transmitting optical fiber 41; in other preferred embodiments, the angle between the extension direction of the anode tab 101 and the direction of the transmitting optical fiber 41 can be an acute angle, which is not specifically limited here.

[0051] like Figure 7 , Figure 8 As shown, the position of the cathode tab 102 of the battery cell after passing through the transmitting optical fiber 41 and the receiving optical fiber 42 in sequence is defined as the initial detection position, and this position is the initial shooting position of the cathode shooting camera 72. In this embodiment, the angle between the extension direction of the cathode tab 102 and the direction of the transmitting optical fiber 41 is an acute angle; in other preferred embodiments, the extension direction of the anode tab 101 and the direction of the transmitting optical fiber 41 can also be perpendicular to each other, and no specific limitation is made here.

[0052] The above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit the same. Although the present invention has been described in detail with reference to the above embodiments, it is still possible for a person skilled in the art to modify the technical solutions described in the above embodiments, or to replace some of the technical features therein with equivalents. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions claimed to be protected by the present invention.

Claims

1. A device for detecting the appearance and size of cylindrical battery cells, comprising a frame, characterized in that: The frame is provided with: A conveying mechanism, used for conveying battery cells; A center positioning mechanism, used to position the center points of the battery cells on the same straight line; A lifting mechanism, comprising a lifting cylinder and a rotatable driving wheel; A clamping mechanism, comprising a clamping cylinder and two rotatable clamping wheel sets; The lifting cylinder is used to drive the driving wheel and the clamping mechanism to move up and down, and the clamping cylinder is used to drive the two clamping wheel groups to move horizontally; the two clamping wheel groups are used to clamp the battery cells, and the driving wheel is used to drive the battery cells to rotate; A detection and positioning mechanism, comprising a parallel transmitting optical fiber and a receiving optical fiber, defining the position of the anode tab or cathode tab of the battery cell after it passes through the transmitting optical fiber and the receiving optical fiber in sequence as an initial detection position; A detection mechanism is used to detect the battery cell.

2. The device for detecting the appearance and size of cylindrical battery cells according to claim 1, characterized in that: The conveying mechanism is provided with a positioning seat matched with the battery core.

3. The device for detecting the appearance and size of cylindrical battery cells according to claim 1, characterized in that: The lifting cylinder is provided with a servo motor, the servo motor is connected with a driving shaft, and the driving shaft is connected with the driving wheel; The servo motor is used to drive the driving shaft to rotate, and the driving shaft is used to drive the driving wheel to rotate.

4. The device for detecting the appearance and size of cylindrical battery cells according to claim 1, characterized in that: The number of the center positioning mechanisms is two, and the two center positioning mechanisms are symmetrically arranged on both sides of the frame.

5. The device for detecting the appearance and size of cylindrical battery cells according to claim 1, characterized in that: The center positioning mechanism includes a photoelectric sensor, and the photoelectric sensor is used to sense the end surface of the battery cell.

6. The device for detecting the appearance and size of cylindrical battery cells according to claim 1, characterized in that: The center positioning mechanism comprises a positioning cylinder, on which a positioning column which can move laterally is provided, and the positioning column is used to resist the battery cells so that the center points of the battery cells are located on the same straight line.

7. The device for detecting the appearance and size of cylindrical battery cells according to claim 1, characterized in that: The two clamping wheel groups are symmetrically arranged on both sides of the battery core, and the two clamping wheel groups are moved toward and away from each other through the clamping cylinder.

8. The device for detecting the appearance and size of cylindrical battery cells according to claim 1, characterized in that: The transmitting optical fiber and the receiving optical fiber are parallel to the end surface of the battery cell.

9. The device for detecting the appearance and size of cylindrical battery cells according to claim 1, characterized in that: The distance between the transmitting optical fiber and the receiving optical fiber is 0.5-2 mm.

10. The device for detecting the appearance and size of cylindrical battery cells according to claim 1, characterized in that: The detection mechanism includes a shooting camera, and the shooting camera is used to shoot the surface of the battery cell.

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