A detection device and a winding apparatus

Abstract

The application relates to a detection device and a winding equipment. The detection device comprises a light source for emitting irradiation light, a visual detection piece for receiving imaging light to perform visual detection, and an optical element group located on a first light path between the light source and a winding needle to guide the irradiation light emitted by the light source to pass through a light transmission hole and irradiate on a corner of a pole piece strip; the optical element group is also located on a second light path between the visual detection piece and the winding needle to guide the imaging light reflected by the corner of the pole piece strip and passing through the light transmission hole to the visual detection piece.

Description

Technical Field

[0001] This invention relates to the field of battery manufacturing equipment technology, and in particular to a testing device and a winding device. Background Technology

[0002] In battery manufacturing, a needle is used to wind separators and electrodes to form a battery cell. During the winding process, an insertion operation is required, such as inserting the electrode between two separators into the slit of the needle. However, during the insertion operation, the corners of the electrode are prone to contact with other strips or components, causing friction or even collisions. This can lead to corner folds or exposed metal, which negatively impacts the quality of the battery cell. Summary of the Invention

[0003] Therefore, it is necessary to provide a detection device and winding equipment to address the problem that in the prior art, the corners of the electrode sheets are prone to contact with other strips or components during the insertion process, resulting in friction or even collision, which can cause the corners of the electrode sheets to bend or expose metal, thus adversely affecting the quality of the battery cell.

[0004] A detection device for detecting the corner of an electrode strip inserted into a winding needle, the detection device comprising:

[0005] A light source, used to emit light;

[0006] A vision inspection component for receiving imaging light to perform visual inspection; and

[0007] An optical element group is located in a first optical path between the light source and the winding needle to guide the illumination light emitted by the light source through the light-transmitting hole on the winding needle and to illuminate the corner of the electrode strip; the optical element group is also located in a second optical path between the vision inspection device and the winding needle to guide the imaging light reflected from the corner of the electrode strip and passing through the light-transmitting hole to the vision inspection device.

[0008] In one embodiment, the optical element group includes a beam splitter and a reflector. The beam splitter is located on the light-emitting side of the light source, and the reflector is located between the beam splitter and the winding needle. The beam splitter is used to reflect the illumination light emitted by the light source to the reflector, and the reflector is used to reflect the illumination light reflected by the beam splitter, so that the illumination light reflected by the reflector passes through the light-transmitting hole and illuminates the corner of the electrode strip.

[0009] In one embodiment, the visual inspection element is located on the side of the beam splitter away from the reflector. The reflector is also used to reflect the imaging light that is reflected by the corner of the electrode strip and passes through the light-transmitting hole, so that the imaging light reflected by the reflector enters the beam splitter. The beam splitter is also used to allow the imaging light reflected by the reflector to pass through and reach the visual inspection element.

[0010] In one embodiment, two light sources, two vision detection devices, and two beam splitters are provided; one light source, one beam splitter, and one reflector are located on one first optical path; the other light source, the other beam splitter, and the reflector are located on another first optical path; the illumination light emitted by the two light sources illuminates two corners of the electrode strip through the two first optical paths respectively;

[0011] One of the visual inspection devices, one of the beam splitters and the mirror are located on one second optical path; another of the visual inspection devices, another of the beam splitters and the mirror are located on another second optical path; the imaging light reflected by the two corners of the electrode strip enters the two visual inspection devices respectively through the two second optical paths.

[0012] In one embodiment, the detection device further includes a first adjustment mechanism, which includes a base and an adjustment assembly. The adjustment assembly includes an adjustment frame disposed on the base. The position of the adjustment frame relative to the base is adjustable along a first direction parallel to the width direction of the electrode strip. The visual inspection component, the light source, and the beam splitter are all disposed on the adjustment frame.

[0013] In one embodiment, the adjustment assembly further includes a first adjustment block, a second adjustment block, and a first adjustment member;

[0014] Both the first adjusting block and the second adjusting block are disposed on the base and arranged along the first direction. The positions of the first adjusting block and the second adjusting block relative to the base are adjustable along the first direction. The adjusting frame is connected to the second adjusting block. The first adjusting member is rotatably connected to the first adjusting block and threadedly connected to the second adjusting block.

[0015] In one embodiment, the adjustment assembly further includes an angle adjustment plate disposed on the adjustment frame, the angle adjustment plate being controllably rotatable relative to the adjustment frame about a rotation axis perpendicular to the first direction, and the visual inspection element being mounted on the angle adjustment plate.

[0016] In one embodiment, the detection device further includes a second adjustment mechanism, the second adjustment mechanism including a base, on which the reflector is mounted;

[0017] The base has a first air hole for blowing air onto the mirror surface of the reflector.

[0018] In one embodiment, the detection device further includes a second adjustment mechanism, the second adjustment mechanism including a base, on which the reflector is mounted;

[0019] The second adjustment mechanism further includes an air blowing component disposed on the base, the air blowing component having a second air blowing hole for blowing air into the light-transmitting hole of the winding needle.

[0020] In one embodiment, the position and / or angle of the air blowing element relative to the seat is adjustable.

[0021] In one embodiment, the detection device further includes a second adjustment mechanism, the second adjustment mechanism including a base, on which the reflector is mounted;

[0022] The position and / or angle of the reflector relative to the base are adjustable.

[0023] A winding device includes a winding apparatus and a detection device as described in any of the above embodiments. The winding apparatus includes a device body and a winding needle disposed on the device body. The winding needle is controllably rotatable relative to the device body about its own axis.

[0024] In practical use, after the electrode strip is inserted into the winding needle, the illumination light emitted by the light source passes through the light-transmitting hole on the winding needle under the guidance of the optical element assembly, and then illuminates the corner of the electrode strip. The imaging light reflected by the electrode strip exits through the light-transmitting hole and enters the vision inspection unit under the guidance of the optical element assembly. The vision inspection unit uses the received imaging light to image the corner of the electrode strip, thereby determining whether there are defects such as folds at the corners. When the vision inspection unit detects that there are no defects such as folds at the corners of the electrode strip, it controls the winding needle to rotate for winding. When the vision inspection unit detects defects such as folds at the corners of the electrode strip, the operator can take timely action to avoid winding cells with poor quality, which helps to ensure the quality of the cells. Attached Figure Description

[0025] Figure 1 This is a schematic diagram of the structure of a winding device according to an embodiment of the present invention;

[0026] Figure 2 This is a schematic diagram illustrating the principle of visual inspection performed by the detection device in one embodiment of the present invention;

[0027] Figure 3 for Figure 1 A schematic diagram of the structure of the first adjustment mechanism of the detection device of the winding equipment shown;

[0028] Figure 4 for Figure 3 A schematic diagram of the first adjustment mechanism shown from another perspective;

[0029] Figure 5 for Figure 1 A schematic diagram of the structure of the second adjustment mechanism of the detection device of the winding equipment shown;

[0030] Figure 6 for Figure 5 The diagram shows the structure of the second adjustment mechanism from another perspective. Detailed Implementation

[0031] To make the above-mentioned objects, features, and advantages of the present invention more apparent and understandable, specific embodiments of the present invention will be described in detail below with reference to the accompanying drawings. Many specific details are set forth in the following description to provide a thorough understanding of the present invention. However, the present invention can be practiced in many other ways different from those described herein, and those skilled in the art can make similar modifications without departing from the spirit of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed below.

[0032] In the description of this invention, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this invention 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. Therefore, they should not be construed as limitations on this invention.

[0033] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this invention, "a plurality of" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0034] In this invention, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; 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; they can refer to the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0035] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "over," and "on top" of the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0036] It should be noted that when an element is referred to as being "fixed to" or "set on" another element, it can be directly on the other element or there may be an intervening element. When an element is considered to be "connected to" another element, it can be directly connected to the other element or there may be an intervening element. The terms "vertical," "horizontal," "upper," "lower," "left," "right," and similar expressions used herein are for illustrative purposes only and do not represent the only possible implementation.

[0037] Please see Figure 1 An embodiment of the present invention provides a winding device, including a detection device 1 and a winding device 2. The winding device 2 includes a device body 100 and a winding needle 101 rotatably mounted on the device body 100 about its own axis. During winding, the electrode strip is inserted into the winding needle 101, and the winding needle 101 is rotated relative to the device body 100 about its own axis, thereby winding the electrode strip onto the winding needle 101 to form a battery cell. The winding needle 101 has a light-transmitting hole 103 for exposing the corner of the electrode strip inserted into the winding needle 101. The detection device 1 performs visual inspection of the corner of the electrode strip through the light-transmitting hole 103. Visual inspection refers to imaging the corner of the electrode strip and using the image to determine whether there are defects such as folds at the corner of the electrode strip.

[0038] Please see Figure 2As shown, the detection device 1 includes a light source 10, a vision detection element 20, and an optical element assembly 30. The light source 10 emits illumination light a1. The vision detection element 20 receives imaging light a2 to form an image, thereby achieving visual detection. It should be noted that illumination light a1 refers to the light used to illuminate the object being detected; imaging light a2 refers to the light reflected from the object being detected. The vision detection element 20 receives imaging light a2, thereby using the imaging light a2 to form an image of the object being detected, thus achieving visual detection.

[0039] Optical element assembly 30 is located on the first optical path A1 between the light source 10 and the winding needle 101 to guide the illumination light a1 emitted by the light source 10 through the light-transmitting aperture 103 and onto the corner of the electrode strip, thereby illuminating the corner of the electrode strip for visual inspection. Optical element assembly 30 is also located on the second optical path A2 between the visual inspection element 20 and the winding needle 101 to guide the imaging light a2 reflected from the corner of the electrode strip and exiting the light-transmitting aperture 103 to the visual inspection element 20. The visual inspection element 20 uses the received imaging light a2 to image the corner of the electrode strip b2, thereby determining whether there are defects such as folds at the corner of the electrode strip. Optionally, the visual inspection element 20 can be an image sensor, such as a camera.

[0040] In actual use, when the electrode strip is inserted into the winding needle 101, the illumination light a1 emitted by the light source 10 passes through the light-transmitting hole 103 on the winding needle 101 under the guidance of the optical element group 30, and then illuminates the corner of the electrode strip. The imaging light a2 reflected by the electrode strip exits through the light-transmitting hole 103 and enters the vision inspection element 20 under the guidance of the optical element group 30. The vision inspection element 20 uses the received imaging light a2 to image the corner of the electrode strip, thereby determining whether there are defects such as folds at the corner of the electrode strip. When the vision inspection element 20 detects that there are no defects such as folds at the corner of the electrode strip, it controls the winding needle 101 to rotate for winding. When the vision inspection element 20 detects that there are defects such as folds at the corner of the electrode strip, the operator can take timely action to avoid winding cells with poor quality, which helps to ensure the quality of the cells.

[0041] Specifically, in this embodiment, the optical element group 30 includes a beam splitter 31 and a reflector 32. The beam splitter 31 is located on the light-emitting side of the light source 10, allowing the illumination light a1 emitted by the light source 10 to be directed towards the beam splitter 31. The reflector 32 is located between the beam splitter 31 and the winding needle 101. The beam splitter 31 reflects the illumination light a1 emitted by the light source 10 to the reflector 32, which in turn reflects the illumination light a1 reflected by the beam splitter 31. This allows the illumination light a1 reflected by the reflector 32 to pass through the light-transmitting hole 103 and illuminate the corner of the electrode strip, thus illuminating the corner of the electrode strip inserted into the winding needle 101 using the illumination light a1. In other words, the illumination light a1 emitted by the light source 10 passes through the beam splitter 31 (for reflection), the reflector 32 (for reflection), and the light-passing hole 103 of the winding needle 101 in sequence, and then illuminates the corner of the electrode strip, forming the first light path A1, thereby illuminating the corner of the electrode strip.

[0042] The visual inspection element 20 is located on the side of the beam splitter 31 opposite to the reflector 32. The reflector 32 is also used to reflect the imaging light a2 reflected from the corner of the electrode strip and passing through the light-transmitting hole 103, so that the imaging light a2 reflected by the reflector 32 enters the beam splitter 31. The beam splitter 31 is also used to allow the imaging light a2 reflected by the reflector 32 to pass through and reach the visual inspection element 20, so that the visual inspection element 20 receives the imaging light a2 to form an image.

[0043] Thus, the beam splitter 31 and the reflector 32 sequentially reflect the illumination light a1 emitted by the light source 10, causing the illumination light a1 to pass through the light-transmitting hole 103 on the winding needle 101 and illuminate the corner of the electrode strip, thereby illuminating the corner of the electrode strip. Simultaneously, the imaging light a2 reflected from the corner of the electrode strip is reflected by the reflector 32 and then passes through the beam splitter 31, allowing the imaging light a2 to enter the vision inspection unit 20. The vision inspection unit 20 uses the received imaging light a2 to image the corner of the electrode strip, thereby determining whether there are defects such as folds at the corner of the electrode strip based on the image. On the one hand, illuminating the corner of the electrode strip with the illumination light a1 ensures clear imaging of the electrode strip, improving the accuracy of visual inspection; on the other hand, the simple optical path structure helps save space and reduce device cost.

[0044] Please see Figure 1 , Figure 3 and Figure 4As shown, in an embodiment of the present invention, the detection device 1 further includes a first adjustment mechanism 40, which includes a base 41 and an adjustment assembly 42. The adjustment assembly 42 includes an adjustment frame 421 disposed on the base 41, the position of which relative to the base 41 is adjustable along a first direction X parallel to the width direction of the electrode strip. The aforementioned visual inspection element 20, light source 10, and beam splitter 31 are all disposed on the adjustment frame 421, so that the visual inspection element 20, light source 10, and beam splitter 31 are adjusted in position along the first direction X along with the adjustment frame 421 relative to the base 41, thereby ensuring that the beam splitter 31 can accurately reflect the illumination light a1 emitted by the light source 10 to the reflector 32, and that the imaging light a2 reflected by the reflector 32 can accurately enter the beam splitter 31, so that the imaging light a2 passes through the beam splitter 31 and reaches the visual inspection element 20. It should be noted that the width direction of the electrode strip is the axial direction of the winding needle 101.

[0045] Optionally, the adjustment assembly 42 further includes a first adjustment block 422, a second adjustment block (not shown), and a first adjustment member 423. Both the first and second adjustment blocks are mounted on the base 41 and arranged along the first direction X, and their positions relative to the base 41 are adjustable along the first direction X. An adjustment frame 421 is fixedly connected to the second adjustment block, allowing the adjustment frame 421 to follow the second adjustment block in adjusting its position relative to the base 41 along the first direction X. The second adjustment block has a first threaded hole (not shown) extending longitudinally along the first direction X, and the first adjustment member 423 is rotatably connected to the first adjustment block 422 and threadedly connected within the first threaded hole.

[0046] Thus, during position adjustment, firstly, the first adjusting block 422 and the second adjusting block are loosened, and the first adjusting block 422 and the second adjusting block as a whole are moved relative to the base 41 along the first direction X, thereby driving the visual inspection element 20, the light source 10, and the beam splitter 31 on the adjusting frame 421 to perform preliminary position adjustment along the first direction X. After the preliminary adjustment is in place, the first adjusting block 422 is locked so that it cannot move relative to the base 41 along the first direction X. Then, the first adjusting element 423 is turned, thereby driving the second adjusting block to move relative to the first adjusting block 422 along the first direction X, thereby driving the visual inspection element 20, the light source 10, and the beam splitter 31 to perform precise position adjustment along the first direction X. After precise adjustment is in place, the turning of the first adjusting element 423 is stopped, and the second adjusting block is locked so that the second adjusting block is fixed relative to the base 41. Optionally, the first adjusting element 423 can be an adjusting screw.

[0047] Furthermore, the adjusting assembly 42 also includes an elastic element 424, whose opposite ends abut against the first adjusting block 422 and the second adjusting block, respectively, thereby providing a preload force that causes the first adjusting block 422 and the second adjusting block to move away from each other. Thus, the elastic element 424 allows the second adjusting block to move more smoothly towards or away from the first adjusting block 422 under the action of the elastic element 424 when the first adjusting assembly 423 is turned. Optionally, the elastic element 424 can be a spring.

[0048] Furthermore, the adjusting assembly 42 also includes a first locking member 427 and a second locking member (not shown). The first adjusting block 422 can be locked and fixed to the base 41 by the first locking member 427, and the second adjusting block can be locked and fixed to the base 41 by the second locking member. Optionally, the first locking member 427 and the second locking member can be locking screws.

[0049] In a specific embodiment, the adjustment assembly 42 further includes an angle adjustment plate 425 disposed on the adjustment frame 421. The angle adjustment plate 425 is controllably rotatable relative to the adjustment frame 421 about a rotation axis perpendicular to the first direction X, and the vision detection element 20 is mounted on the angle adjustment plate 425. Thus, by rotating the angle adjustment plate 425 relative to the adjustment frame 421, the vision detection element 20 is driven to adjust its angle, ensuring that the vision detection element 20 can accurately receive the imaging light a2 passing through the beam splitter 31.

[0050] Furthermore, the adjustment assembly 42 also includes a second adjustment member 426. The adjustment frame 421 has a second threaded hole extending longitudinally along a second direction Y perpendicular to the aforementioned rotation axis. The second adjustment member 426 is threadedly connected to the second threaded hole, and one end of the second adjustment member 426 abuts against the angle adjustment plate 425. Thus, by rotating the second adjustment member 426, the angle adjustment plate 425 can be pushed to rotate relative to the adjustment frame 421, thereby driving the vision detection member 20 to rotate and perform angle adjustment.

[0051] Preferably, there are two second adjusting members 426. The two second adjusting members 426 abut against the same side of the angle adjusting plate 425 in the second direction Y, and the abutment positions of the two second adjusting members 426 and the angle adjusting plate 425 are respectively located at both ends of the angle adjusting plate 425 in the first direction X. Thus, the angle adjusting plate 425 can be pushed to rotate clockwise and counterclockwise through the cooperation of the two second adjusting members 426, making angle adjustment more convenient.

[0052] Furthermore, the angle adjustment plate 425 has a first oblong hole 4251, which extends longitudinally along an arc around the aforementioned axis of rotation. The adjustment assembly 42 also includes a third locking member (not shown), which passes through the first oblong hole 4251 and is threadedly connected to the adjustment frame 421 to lock the angle adjustment plate 425 onto the adjustment frame 421. Thus, when the angle of the vision inspection element 20 needs to be adjusted: first, the third locking member is loosened, allowing the angle adjustment plate 425 to rotate relative to the adjustment frame 421. Then, the second adjustment member 426 is screwed on, thereby pushing the angle adjustment plate 425 to rotate relative to the adjustment frame 421 until the angle of the vision inspection element 20 on the angle adjustment plate 425 is adjusted to the desired position. Then, the third locking member is tightened, locking the angle adjustment plate 425 onto the adjustment frame 421. Optionally, the third locking member can be a locking screw.

[0053] Specifically, in this embodiment, the base 41 includes a base body 411, a slide rod 412, and a connecting block 413. One end of the slide rod 412 is fixedly connected to the base body 411, and the other end of the slide rod 412 is connected to the connecting block 413. The axial direction of the slide rod 412 is parallel to the first direction X. The first adjusting block 422 and the second adjusting block are both slidably connected to the slide rod 412. The first adjusting block 422 can be locked and fixed to the slide rod 412 by the first locking member 427, and the second adjusting block can be locked and fixed to the slide rod 412 by the second locking member. In this way, the slide rod 412 guides the movement of the first adjusting block 422 and the second adjusting block along the first direction X, thereby making the position adjustment of the visual inspection element 20, the light source 10, and the beam splitter 31 smoother. Preferably, there can be two slide rods 412. The two slide rods 412 can guide the first adjusting block 422 and the second adjusting block at the same time, which can improve the guiding effect and prevent the first adjusting block 422 and the second adjusting block from rotating on the slide rods 412.

[0054] It should be noted that the electrode strip has two corners at its end. To simultaneously perform visual inspection on both corners of the electrode strip, in one embodiment, two light sources 10, two visual inspection devices 20, and two beam splitters 31 are provided. One light source 10, one beam splitter 31, and one reflector 32 are located on a first optical path A1. The other light source 10, the other beam splitter 31, and the reflector 32 are located on another first optical path A1, meaning that the two first optical paths A1 share the same reflector 32. The illumination light a1 emitted by the two light sources 10 illuminates the two corners of the electrode strip through the two first optical paths A1, respectively, so that both corners of the electrode strip are illuminated. One visual inspection device 20, one beam splitter 31, and one reflector 32 are located on a second optical path A2. The other visual inspection device 20, the other beam splitter 31, and the reflector 32 are located on another second optical path A2, meaning that the two second optical paths A2 share the same reflector 32. The imaging light rays a2 reflected from the two corners of the electrode strip enter the two vision inspection devices 20 through two second optical paths A2 respectively. The two vision inspection devices 20 are used to image the two corners of the electrode strip respectively, thereby determining whether there are defects such as folds at the two corners of the electrode strip.

[0055] Thus, two sets of light sources 10, visual inspection devices 20, and beam splitters 31 (each set includes one light source 10, one visual inspection device 20, and one beam splitter 31) are used with the reflector 32 to form two first optical paths A1 and two second optical paths A2. The two first optical paths A1 guide the illumination rays a1 emitted by the two light sources 10 to illuminate the two corners of the electrode strip, so that the two corners of the electrode strip are illuminated simultaneously. At the same time, the two second optical paths A2 guide the imaging rays a2 reflected by the two corners of the electrode strip to enter the two visual inspection devices 20, so that the two visual inspection devices 20 image the two corners of the electrode strip respectively and determine whether there are defects such as folds at the two corners of the electrode strip.

[0056] Furthermore, there are two adjustment components 42. One adjustment component 42 is equipped with a set of light sources 10, visual inspection elements 20, and beam splitters 31, while the other adjustment component 42 is equipped with another set of light sources 10, visual inspection elements 20, and beam splitters 31. The first adjustment block 422 and the second adjustment block of both adjustment components 42 are slidably mounted on the slide rod 412, so that the two adjustment components 42 are spaced apart along the first direction X (i.e., parallel to the width direction of the electrode strip), so that the two adjustment components 42 correspond one-to-one with the two corners of the electrode strip. Then, the illumination light a1 emitted by the light source 10 on one adjustment component 42 illuminates one corner of the electrode strip, and the visual inspection element 20 on the adjustment component 42 images the corner and determines whether there are defects such as folds. The illumination light a1 emitted by the light source 10 on the other adjustment component 42 illuminates the other corner of the electrode strip, and the visual inspection element 20 on the adjustment component 42 images the corner and determines whether there are defects such as folds.

[0057] In other words, the light source 10 and beam splitter 31 on one of the adjustment components 42 form a first optical path A1 with the reflector 32, and the visual detection element 20 and beam splitter 31 on the adjustment component 42 form a second optical path A2 with the reflector 32. The light source 10 and beam splitter 31 on the other adjustment component 42 form another first optical path A1 with the reflector 32, and the visual detection element 20 and beam splitter 31 on the adjustment component 42 form another second optical path A2 with the reflector 32.

[0058] Please see Figure 1 , Figure 5 and Figure 6 As shown, in an embodiment of the present invention, the detection device 1 further includes a second adjustment mechanism 50, which includes a base 59 on which a reflector 32 is mounted.

[0059] Furthermore, the position and / or angle of the reflector 32 relative to the base 59 are adjustable. This allows for adjustment of the position of the reflector 32 to accommodate different positions of the winding needle 101 with varying light-transmitting apertures 103, improving the device's compatibility. Simultaneously, the angle of the reflector 32 is adjusted to regulate the angles of the illumination light a1 and the imaging light a2 reflected by the reflector 32. This ensures that the reflector 32 can reflect the illumination light a1 to the light-transmitting aperture 103 of the winding needle 101 and illuminate the corner of the electrode strip, while simultaneously reflecting the imaging light a2 to the beam splitter 31.

[0060] In one specific embodiment, the base 59 includes a mounting base 51, an adjusting base 52, and a fixing base 53. The mounting base 51 is mounted on the device body 100. The adjusting base 52 is disposed on the mounting base 51, and its position relative to the mounting base 51 is adjustable. The fixing base 53 is rotatably connected to the adjusting base 52, and the reflector 32 is mounted on the fixing base 53, thereby allowing the reflector 32 to rotate with the fixing base 53 and its angle to be adjusted. In this way, the position of the reflector 32 relative to the winding needle 101 can be adjusted by moving the adjusting base 52 relative to the mounting base 51, so as to accommodate winding needles 101 with different positions of the light transmission hole 103 and improve the compatibility of the device. Furthermore, the angle of the reflector 32 can be adjusted by rotating the fixed base 53 relative to the adjusting base 52, thereby adjusting the angle of the illumination light a1 and the imaging light a2 reflected by the reflector 32, ensuring that the reflector 32 can reflect the illumination light a1 to the light-transmitting hole 103 of the winding needle 101 and illuminate the corner of the electrode strip, while reflecting the imaging light a2 to the beam splitter 31.

[0061] Optionally, the mounting base 51 has multiple mounting holes. The adjusting seat 52 can be selectively locked into some of these mounting holes using a locking member, thereby locking the adjusting seat 52 to the mounting base 51. Furthermore, by locking the adjusting seat 52 into different mounting holes, the position of the adjusting seat 52 relative to the mounting base 51 can be adjusted. Of course, other position adjustment structures can also be used, as long as they can achieve position adjustment of the adjusting seat 52 relative to the mounting base 51; this is not limited here.

[0062] Optionally, the fixed seat 53 is rotatably connected to the adjusting seat 52 via a rotating shaft 54. The adjusting seat 52 has a second oblong hole 521 extending longitudinally around the rotating shaft 54. The second adjusting mechanism 50 also includes a fourth locking member (not shown), which passes through the second oblong hole 521 and is threadedly connected to the fixed seat 53 to lock the fixed seat 53 onto the adjusting seat 52. Thus, when it is necessary to adjust the angle of the reflector 32, the fourth locking member is loosened, allowing the fixed seat 53 to rotate relative to the adjusting seat 52 around the rotating shaft 54. Then, by controlling the rotation of the fixed seat 53 around the rotating shaft 54, the reflector 32 is rotated until the angle of the reflector 32 is adjusted to the desired position. Then, the fourth locking member is tightened to lock the fixed seat 53 onto the adjusting seat 52. Optionally, the fourth locking member can be a locking screw.

[0063] Specifically, in this embodiment, the mounting base 53 of the seat 59 has a first air hole (not shown). This first air hole is used to blow air onto the mirror surface of the reflector 32, thereby blowing away dirt from the mirror surface and cleaning the mirror surface of the reflector 32, which helps to improve the accuracy of detection. Furthermore, there are two mounting bases 53, with opposite ends of the reflector 32 respectively mounted on the two mounting bases 53. The first air hole is located on the sides of the two mounting bases 53 facing each other, allowing the airflow from the first air hole to flow onto the mirror surface of the reflector 32, achieving the purpose of cleaning the mirror surface of the reflector 32.

[0064] It is understandable that the first air outlet is connected to an external air supply device through a pipeline, so that the external air supply device supplies air to the first air outlet, and the first air outlet blows air out onto the mirror surface of the reflector 32.

[0065] It should be noted that, please refer to Figure 1 As shown, in one embodiment, the device body 100 is provided with three winding needles 101. These three winding needles 101 rotate with the device body 100 and sequentially reach the winding station c1, the adhesive application station c2, and the unloading station c3. Every 120° rotation of the device body 100 drives one winding needle 101 to the winding station c1, while the other two winding needles 101 reach the adhesive application station c2 and the unloading station c3, respectively. Each winding needle 101 has a slit 102 and the aforementioned light-transmitting hole 103. The slit 102 is used for inserting the electrode strip, and the light-transmitting hole 103 is used to expose the corner of the electrode strip inserted into the slit 102. It can be understood that since the electrode strip has two corners, each winding needle 101 can have two light-transmitting holes 103 corresponding to the two corners, that is, the two light-transmitting holes 103 respectively expose the two corners of the electrode strip.

[0066] In one embodiment, the electrode strip includes a first electrode strip b2 and a second electrode strip b3. The battery cell is formed by winding a separator b1, a first electrode strip b2, a separator b1, and a second electrode strip b3 sequentially stacked. Specifically, the four layers of strips are fed through two parallel rolling rollers 104 to a winding needle 101 located at the winding station c1 for winding. When the battery cell on the winding needle 101 at the winding station c1 is almost fully wound, the first electrode strip b2 is cut off upstream of the parallel rolling rollers 104 using a first cutter 200. At this time, the winding needle 101 at the winding station c1 continues winding until the tail end of the first electrode strip b2 is wrapped inside the battery cell. Then, the winding device 2 rotates 120° clockwise, causing the winding needle 101 with the wound battery cell to reach the adhesive application station c2, and the next winding needle 101 to reach the winding station c1. Then, the winding needle 101 reaching the winding station c1 moves axially (i.e., as shown in the image). Figure 1The material extends outwards (perpendicular to the paper surface), allowing the three-layer strip formed by the diaphragm b1, the diaphragm b1, and the second electrode strip b3 to enter and be clamped in the slit 102 of the winding needle 101. At this time, the three-layer strip is cut by the second cutter 300 at a position between the winding station c1 and the adhesive application station c2. Then, the first electrode strip b2 is inserted into the slit 102 of the winding needle 101 located at the winding station c1. After insertion, the two corners of the first electrode strip b2 are visually inspected using the detection device 1. When it is detected that there are no defects such as folds at the two corners of the first electrode strip b2, the winding needle 101 located at the winding station c1 is rotated to perform winding.

[0067] As can be seen from the above, when the first electrode strip b2 is inserted into the slit 102 of the winding needle 101, three layers of strips (i.e., two layers of diaphragms b1 and one layer of second electrode strip b3) are threaded through the slit 102 of the winding needle 101. After the first electrode strip b2 is inserted into the slit 102 of the winding needle 101, the first electrode strip b2 is located between the two layers of diaphragms b1. Since the diaphragm b1 is transparent, the irradiation light a1 can pass through the diaphragm b1 and irradiate the corner of the first electrode strip b2. The imaging light a2 reflected by the first electrode strip b2 can pass through the diaphragm b1 and exit through the light-transmitting hole 103.

[0068] However, if the diaphragm b1 inside the slit 102 of the needle coil 101 does not fit tightly with the first electrode strip b2, it will result in poor imaging quality of the visual inspection component 20 and reduce the accuracy of the inspection.

[0069] To avoid the problem of low detection accuracy caused by the diaphragm b1 within the slit 102 of the needle winding 101 not adhering tightly to the first electrode strip b2, in one embodiment, the second adjustment mechanism 50 further includes an air blowing member 55 disposed on the base 59. This air blowing member 55 has a second air blowing hole 551 for blowing air into the light-transmitting hole 103 of the needle winding 101. Thus, by blowing air into the light-transmitting hole 103 using the second air blowing hole 551, each layer of strip within the needle winding 101 is tightly adhered to the sidewall of the slit 102 opposite to the light-transmitting hole 103, i.e., the diaphragm b1 and the first electrode strip b2 are tightly adhered, allowing the visual inspection member 20 to clearly image the corner of the first electrode strip b2, ensuring detection accuracy.

[0070] Optionally, the air blowing component 55 can be an air blowing pipe, which is connected to an external air supply device. Multiple second air blowing holes 551 are opened on the side wall of the air blowing pipe, so that the external air supply device sends air into the air blowing pipe and blows air out through the second air blowing holes 551 to the light-transmitting hole 103 of the winding needle 101.

[0071] Furthermore, the position and / or angle of the air blowing element 55 relative to the seat 59 is adjustable. By adjusting the position and / or angle of the air blowing element 55 relative to the seat 59, the second air blowing hole 551 is aligned with the light-transmitting hole 103 on the winding needle 101, ensuring that the airflow from the second air blowing hole 551 accurately passes through the light-transmitting hole 103 and acts on each layer of material strip within the winding needle 101. Specifically, in one embodiment, the air blowing element 55 is mounted on the mounting base 51, and the position and / or angle of the air blowing element 55 relative to the mounting base 51 is adjustable.

[0072] Optionally, the base 59 also includes a first mounting bracket 56 and a second mounting bracket 57. The air-blowing component 55 is rotatably connected to the first mounting bracket 56, thereby adjusting the blowing angle of the second air-blowing hole 551. The first mounting bracket 56 is movably connected to the second mounting bracket 57 along a third direction U, thereby adjusting the position of the air-blowing component 55 in the third direction U. The second mounting bracket 57 is movably connected to the mounting base 51 along a fourth direction V intersecting the third direction U, thereby adjusting the position of the air-blowing component 55 in the fourth direction V. Thus, by adjusting the position of the air-blowing component 55 in the third direction U and the fourth direction V, and by adjusting the blowing angle of the second air-blowing hole 551 of the air-blowing component 55, it is ensured that the airflow from the second air-blowing hole 551 can accurately enter the light-transmitting hole 103 of the winding needle 101 and act on each layer of material strip within the winding needle 101, ensuring that the diaphragm b1 and the first electrode strip b2 are tightly bonded. Preferably, the third direction U is perpendicular to the fourth direction V, and both the third direction U and the fourth direction V are perpendicular to the width direction of the first electrode strip b2.

[0073] Optionally, the mounting base 51 has multiple mounting holes along the fourth direction V. The second mounting bracket 57 can be selectively locked and fixed in some of the mounting holes by locking screws, thereby achieving the fastening of the second mounting bracket 57 and the mounting base 51. Furthermore, the second mounting bracket 57 can be fixed by selecting different mounting holes, thereby achieving the position adjustment of the second mounting bracket 57 relative to the mounting base 51 along the fourth direction V.

[0074] Optionally, the second mounting bracket 57 has multiple mounting holes along the third direction U. The first mounting bracket 56 can be selectively locked and fixed in some of the mounting holes by locking screws, thereby achieving the fastening of the first mounting bracket 56 and the second mounting bracket 57. Furthermore, the first mounting bracket 56 can be fixed by selecting different mounting holes, thereby achieving the position adjustment of the first mounting bracket 56 relative to the second mounting bracket 57 along the third direction U.

[0075] It is understood that the detection device 1 of the present invention is not limited to visually inspecting the corners of the first electrode strip b2. In other embodiments, the second electrode strip b2 may also require an insertion action, that is, inserting the second electrode strip b2 into the winding needle 101. The detection device 1 can also be used to simultaneously visually inspect the corners of the first electrode strip b2 and the second electrode strip b3 inserted into the winding needle 101, which is not limited here. It should be noted that since the width of the second electrode strip b3 is greater than the width of the first electrode strip b2, when both the first electrode strip b2 and the second electrode strip b3 are inserted into the winding needle 101, the first electrode strip b2 will not obstruct the corners of the second electrode strip b3, and both diaphragms b1 are transparent, thereby enabling the detection device 1 to visually inspect the corners of both the first electrode strip b2 and the second electrode strip b3 inserted into the winding needle 101. Optionally, the first electrode strip b2 can be a cathode electrode strip, and the second electrode strip b3 can be an anode electrode strip.

[0076] It should be noted that, since the device body 100 is provided with three winding needles 101, and these three winding needles 101 follow the device body 100 to the winding station c1 for winding, in order to perform visual inspection of the corners of the electrode strip within the three winding needles 101, in one embodiment, the number of second adjustment mechanisms 50 is three. The mounting bases 51 of the three second adjustment mechanisms 50 are all mounted on the device body 100, and the fixing bases 53 of the three second adjustment mechanisms 50 are all equipped with reflectors 32. The three second adjustment mechanisms 50 are arranged in a one-to-one correspondence with the three winding needles 101. When any winding needle 101 reaches the winding station c1, the reflector 32 on the corresponding second winding needle mechanism 50 reflects the irradiation light a1 into the light-transmitting hole 103 of the winding needle 101 that has reached the winding station c1, and reflects the imaging light a2 emitted from the light-transmitting hole 103 to the beam splitter 31 on the first adjustment component 40.

[0077] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0078] The embodiments described above are merely illustrative of several implementations of the present invention, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the invention patent. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of the present invention, and these all fall within the protection scope of the present invention. Therefore, the protection scope of this invention patent should be determined by the appended claims.

Claims

1. A detection device for detecting the corner of an electrode strip inserted into a winding needle, characterized in that, The detection device includes: A light source, used to emit light; A vision inspection component for receiving imaging light to perform visual inspection; and An optical element group is located in a first optical path between the light source and the winding needle to guide the illumination light emitted by the light source through the light-transmitting hole on the winding needle and to illuminate the corner of the electrode strip; the optical element group is also located in a second optical path between the vision inspection element and the winding needle to guide the imaging light reflected from the corner of the electrode strip and passing through the light-transmitting hole to the vision inspection element. The winding needle has a slit for inserting the electrode strip and a light-transmitting hole communicating with the slit.

2. The detection device according to claim 1, characterized in that, The optical element group includes a beam splitter and a reflector; The beam splitter is located on the light-emitting side of the light source, and the reflector is located between the beam splitter and the winding needle. The beam splitter is used to reflect the illumination light emitted by the light source to the reflector, and the reflector is used to reflect the illumination light reflected by the beam splitter, so that the illumination light reflected by the reflector passes through the light-transmitting hole and illuminates the corner of the electrode strip.

3. The detection device according to claim 2, characterized in that, The visual inspection component is located on the side of the beam splitter away from the reflector. The reflector is also used to reflect the imaging light that is reflected by the corner of the electrode strip and passes through the light-transmitting hole, so that the imaging light reflected by the reflector enters the beam splitter. The beam splitter is also used to allow the imaging light reflected by the reflector to pass through and reach the visual inspection component.

4. The detection device according to claim 3, characterized in that, Two light sources, two vision detection devices, and two beam splitters are provided; one light source, one beam splitter, and one reflector are located on one first optical path; the other light source, the other beam splitter, and the reflector are located on another first optical path; the illumination light emitted by the two light sources illuminates the two corners of the electrode strip through the two first optical paths respectively; One of the visual inspection devices, one of the beam splitters and the mirror are located on one second optical path; another of the visual inspection devices, another of the beam splitters and the mirror are located on another second optical path; the imaging light reflected by the two corners of the electrode strip enters the two visual inspection devices respectively through the two second optical paths.

5. The detection device according to claim 3, characterized in that, The detection device further includes a first adjustment mechanism, which includes a base and an adjustment component. The adjustment component includes an adjustment frame disposed on the base. The position of the adjustment frame relative to the base is adjustable along a first direction parallel to the width direction of the electrode strip. The visual inspection component, the light source, and the beam splitter are all disposed on the adjustment frame.

6. The detection device according to claim 5, characterized in that, The adjustment assembly further includes an angle adjustment plate disposed on the adjustment frame. The angle adjustment plate is controllably rotatable relative to the adjustment frame about a rotation axis perpendicular to the first direction. The visual inspection element is mounted on the angle adjustment plate.

7. The detection device according to claim 3, characterized in that, The detection device further includes a second adjustment mechanism, which includes a base, and the reflector is mounted on the base. The base has a first air hole for blowing air onto the mirror surface of the reflector.

8. The detection device according to claim 3, characterized in that, The detection device further includes a second adjustment mechanism, which includes a base, and the reflector is mounted on the base. The second adjustment mechanism further includes an air blowing component disposed on the base, the air blowing component having a second air blowing hole for blowing air into the light-transmitting hole of the winding needle.

9. The detection device according to claim 8, characterized in that, The position and / or angle of the air blowing component relative to the seat body are adjustable.

10. The detection device according to claim 3, characterized in that, The detection device further includes a second adjustment mechanism, which includes a base, and the reflector is mounted on the base. The position and / or angle of the reflector relative to the base are adjustable.

11. A winding device, characterized in that, The device includes a winding device and a detection device as described in any one of claims 1 to 10, wherein the winding device includes a device body and the winding needle disposed on the device body, and the winding needle is controllably rotatable relative to the device body about its own axis.

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