CN222364928U - Battery piece scanning imaging device and battery piece defect detection system - Google Patents
Battery piece scanning imaging device and battery piece defect detection system Download PDFInfo
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- CN222364928U CN222364928U CN202323661389.8U CN202323661389U CN222364928U CN 222364928 U CN222364928 U CN 222364928U CN 202323661389 U CN202323661389 U CN 202323661389U CN 222364928 U CN222364928 U CN 222364928U
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- 230000000295 complement effect Effects 0.000 description 2
- 229910021419 crystalline silicon Inorganic materials 0.000 description 2
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Abstract
The application discloses a battery piece scanning imaging device and a battery piece defect detection system. The battery piece scanning imaging device comprises a top surface light source, a camera and a lens. The top light source is used for emitting light to a preset position. The camera is connected with the lens and is used for receiving light rays reflected by the battery piece at a preset position and passing through the lens to form images. The top light source is provided with a through hole, and one of the camera and the lens is positioned in the through hole. Therefore, the integrity of the battery piece image acquired by the camera can be ensured, and the defect detection of the battery piece can be conveniently carried out.
Description
Technical Field
The application relates to the technical field of solar cells, in particular to a cell scanning imaging device and a cell defect detection system.
Background
In the production process of crystalline silicon solar cells, defects such as fragments, unfilled corners, broken edges and the like may be generated, which not only limit the photoelectric conversion efficiency and the service life of the cells, but also cause degradation or scrapping of the cell grades, and broken cells remain in the templates, so that large-scale cell fragments are generated, thereby affecting the production efficiency of factories. Therefore, how to realize defect detection of the battery sheet is an important problem in the production process of the battery sheet.
Disclosure of utility model
The embodiment of the application provides a battery piece scanning imaging device and a battery piece defect detection system, which are used for solving at least one technical problem.
The battery piece scanning imaging device comprises a top surface light source, a camera and a lens, wherein the top surface light source is used for emitting light rays to a preset position, and the camera is connected with the lens and used for receiving the light rays reflected by the battery piece at the preset position and passing through the lens to image;
The top surface light source is provided with a through hole, and one of the camera and the lens is positioned in the through hole.
In some embodiments, the top surface light source includes a first side and a second side opposite to each other, the predetermined location being on the first side, wherein:
the lens is positioned in the through hole, the camera is positioned at the second side, or
The camera is located in the through hole, and the lens is located on the first side.
In some embodiments, a central axis of the through hole coincides with an optical axis of the camera and the lens.
In some embodiments, the top surface light source emits light to the predetermined location in an overexposed manner.
In certain embodiments, the top surface light source includes first and second opposite sides, the predetermined location being on the first side;
The battery piece scanning imaging device further comprises a first strip-shaped light source arranged on the first side, and the first strip-shaped light source is located between the top surface light source and the preset position.
In some embodiments, the battery slice scanning imaging device further comprises a first structural member, the first structural member comprises a first connecting end and a second connecting end, the first connecting end is connected with the top surface light source through the second side, and the second connecting end is connected with the first strip-shaped light source.
In certain embodiments, the top surface light source includes first and second opposite sides, the predetermined location being on the first side;
The battery piece scanning imaging device further comprises a second strip-shaped light source arranged on the second side.
In some embodiments, the battery slice scanning imaging device further comprises a second structural member, the second structural member comprises a third connecting end and a fourth connecting end, the third connecting end is connected with the top surface light source through the second side, and the fourth connecting end is connected with the second strip-shaped light source.
In some embodiments, the camera is an area-array camera for receiving light reflected by the battery plate stationary at the predetermined position and passing through the lens for imaging, or
The camera is a linear array camera and is used for receiving light rays reflected by the battery piece moving to the preset position and passing through the lens to form images.
The battery piece defect detection system of the embodiment of the application comprises:
the battery piece scanning imaging device of any embodiment and
And the defect detection device is used for detecting defects according to the images acquired by the battery piece scanning imaging device.
In the battery piece scanning imaging device and the battery piece defect detection system of the embodiment of the application, the battery piece is positioned at the preset position, the top surface light source emits light to the preset position, the camera or the lens is positioned in the through hole of the top surface light source, and the camera receives the light reflected by the battery piece and passing through the lens to image. Therefore, the integrity of the battery piece image acquired by the camera can be ensured, and the defect detection of the battery piece can be conveniently carried out.
Additional aspects and advantages of the application will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the application.
Drawings
In order to more clearly illustrate the embodiments of the present application or the technical solutions in the related art, the drawings that are required to be used in the embodiments or the related technical descriptions will be briefly described, and it is apparent that the drawings in the following description are only some embodiments of the present application, and other drawings may be obtained from the structures shown in the drawings without inventive effort to those skilled in the art. Wherein:
FIG. 1 is a schematic view of a battery slice scanning imaging device according to some embodiments of the present application at one viewing angle;
FIG. 2 is a schematic diagram of a battery slice scanning imaging device according to another view angle of certain embodiments of the present application;
FIG. 3 is a schematic view of an image of a normal battery plate captured by a camera according to some embodiments of the present application;
FIG. 4 is a schematic view of an image of a defective battery cell acquired by a camera according to some embodiments of the application;
FIG. 5 is a schematic view of an image of a defective battery cell acquired by a camera according to some embodiments of the application;
FIG. 6 is a schematic view of a lens positioned in a through hole according to some embodiments of the present application;
FIG. 7 is a schematic view of a camera of some embodiments of the application positioned within a through hole;
Fig. 8 is a block diagram of a battery cell defect detection system according to some embodiments of the present application.
Reference numerals illustrate:
The battery piece scanning imaging device 100, the top surface light source 10, the through hole 11, the first side 12, the second side 13, the camera 20, the lens 30, the first strip light source 40, the first structural member 50, the first connecting end 51, the second connecting end 52, the first structural body 53, the second strip light source 60, the second structural member 70, the third connecting end 71, the fourth connecting end 72, the second structural body 73, the connecting piece 80, the fifth connecting end 81, the sixth connecting end 82, the seventh connecting end 83, the conveyor belt 101, the defect detection device 200, and the battery piece defect detection system 1000.
Detailed Description
Embodiments of the present application are described in detail below, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to like or similar elements or elements having like or similar functions throughout. The embodiments described below by referring to the drawings are exemplary only for explaining the present application and are not to be construed as limiting the present application.
Referring to fig. 1 and 2, a battery slice scanning imaging device 100 is provided in an embodiment of the application. The battery cell scanning imaging device 100 includes a top surface light source 10, a camera 20, and a lens 30. The top light source 10 is for emitting light to a predetermined position. The camera 20 is connected to the lens 30 for receiving light reflected by the battery plate at a predetermined position and passing through the lens 30 to form an image. The top light source 10 is provided with a through hole 11, and one of the camera 20 and the lens 30 is positioned in the through hole 11.
In the battery cell scanning imaging device 100 according to the embodiment of the application, the battery cell is located at a predetermined position, the top light source 10 emits light to the predetermined position, the camera 20 or the lens 30 is located in the through hole 11 of the top light source 10, and the camera 20 receives the light reflected by the battery cell and passing through the lens 30 to image. In this way, the integrity of the battery piece image collected by the camera 20 can be ensured, and the defect detection on the battery piece can be facilitated.
Specifically, the cell may be a crystalline silicon solar cell. The top surface light source 10 may be a circular, square or any other shape, and a rectangular surface light source may be used as the top surface light source 10 as shown in fig. 1. The light emitted by the top-surface light source 10 may be visible light or near infrared light in different spectral ranges. A through hole 11 is formed in the middle of the top light source 10, and the through hole 11 allows the camera 20 and the lens 30 to pass through. One of the camera 20 and the lens 30 may be at least partially located within the through-hole 11, for example, the lens 30 may be partially or entirely located within the through-hole 11 with the camera 20 located outside the through-hole 11, or the camera 20 may be partially or entirely located within the through-hole 11 with the lens 30 located outside the through-hole 11. When the camera 20 images the battery piece at the predetermined position, the battery piece may be in a stationary state or in a moving state.
When the battery cell is at a predetermined position, light emitted from the top light source 10 irradiates the battery cell, is reflected by the battery cell, passes through the lens 30, and reaches the camera 20, thereby imaging the battery cell. One of the camera 20 and the lens 30 is positioned in the through hole 11, the top surface light source 10 does not block the view field of the camera 20, and the battery piece can form a complete image in the camera 20. In this way, the integrity of the battery piece image collected by the camera 20 can be ensured, the defect detection on the battery piece is facilitated, and the defect missing detection or false detection caused by incomplete battery piece image is prevented.
The battery piece scanning imaging device 100 of the embodiment of the application can be adapted to an online or offline machine table, meets the production mode of an actual machine table, can image the battery piece which is stationary at a preset position or moves to the preset position, and can detect the defects of fragments, unfilled corners, broken edges and the like of the battery piece corresponding to the process section. For example, in connection with fig. 3 and 4, a chipping or unfilled corner defect may be detected from fig. 4, and in connection with fig. 3 and 5, a chipping defect may be detected from fig. 5. Meanwhile, the acquired image can be output to an upper computer through a data interface, then the defect detection and identification are carried out by matching with a related software system, and then the related detection result is fed back to a related executing mechanism (such as battery piece production equipment or battery piece detection equipment) for processing, so that the defect-free piece is ensured to flow out of the detection station.
Referring to fig. 1 and 2, in some embodiments, the top light source 10 includes a first side 12 and a second side 13 opposite to each other, with the predetermined location being on the first side 12. Wherein the lens 30 is located in the through hole 11 and the camera 20 is located at the second side 13, or wherein the camera 20 is located in the through hole 11 and the lens 30 is located at the first side 12.
Specifically, the first side 12 is the side of the top surface light source 10 that emits light. The predetermined position is located on the first side 12 of the top light source 10, and one position on the conveyor belt 101 of the production line may be taken as the predetermined position (as shown in position a in fig. 1), and the conveyor belt 101 is located on the first side 12 of the top light source 10. It will be appreciated that in order for the light from the top surface light source 10 to be better emitted to the battery plate at a predetermined location, the predetermined location should be within the illuminated field of view of the top surface light source 10. The camera 20 is connected to the lens 30, and the lens 30 is positioned at a side of the camera 20 near the predetermined position, and when the lens 30 is positioned in the through hole 11 as shown in fig. 6, the camera 20 is positioned at the second side 13 of the top light source 10, or when the camera 20 is positioned in the through hole 11 as shown in fig. 7, the lens 30 is positioned at the first side 12 of the top light source 10.
In some embodiments, the central axis of the through hole 11 coincides with the optical axes of the camera 20 and the lens 30.
Specifically, the through hole 11 is located at the middle position of the top light source 10, and the central axis of the through hole 11 is consistent with the optical axes of the camera 20 and the lens 30, that is, the optical axes of the camera 20 and the lens 30 are located on the central axis of the top light source 10. In addition, the predetermined position is located in the irradiation view field of the top light source 10, and the camera 20 located on the central axis of the top light source 10 collects the image of the battery piece located at the predetermined position, so that the integrity of the image of the battery piece collected by the camera 20 can be ensured, and the defect missing detection or false detection caused by the incomplete image of the battery piece can be prevented.
In some embodiments, the top surface light source 10 emits light to a predetermined location in an overexposed manner.
Specifically, the top light source 10 remains normally on, emits light to a predetermined position in an overexposure manner, irradiates the battery cell with light, and overexposes the region where the battery cell is located in the image acquired by the camera 20. As shown in fig. 3 to 5, the white area is the overexposed battery piece and the black area is the background. When the defects such as fragments, unfilled corners, broken edges and the like exist in the battery piece, the defect area is not overexposed and imaged into a black area, and the contrast ratio between the white area and the black area is obvious. Therefore, the overexposed image of the battery piece can clearly show the defect of the battery piece, so that the development difficulty of an algorithm for detecting the subsequent defect is reduced, and the difficulty of detecting the defect of the battery piece is reduced.
Referring to fig. 1 and 2, in some embodiments, the top light source 10 includes a first side 12 and a second side 13 opposite to each other, with the predetermined location being on the first side 12. The battery cell scanning imaging device 100 further includes a first bar light source 40 disposed on the first side 12, the first bar light source 40 being located between the top light source 10 and the predetermined location.
Wherein the first side 12 is a side of the top light source 10 emitting light. The conveyor belt 101 is located on a first side 12 of the top light source 10. The predetermined location is located on the first side 12 of the top light source 10, and may specifically be a location on the conveyor belt 101 (as shown in position a in fig. 1). The first bar-shaped light source 40 emits light toward a predetermined position. The light emitted by the first strip light source 40 may be visible light or near infrared light of different spectral ranges.
Specifically, when the illumination condition of the top light source 10 on the battery plate is poor, for example, a part of the structure in the battery plate scanning imaging device 100 shields the top light source 10, a part of light may not illuminate the battery plate, so that the quality of the battery plate image collected by the camera 20 is poor, and the defect detection effect is affected. Accordingly, the first bar-shaped light source 40 may be disposed between the top-surface light source 10 and the predetermined position at the first side 12 as a light supplementing light source of the battery sheet scanning imaging device 100 to supplement light to the area where the battery sheet is insufficient in light. Thus, the quality of the battery piece image collected by the camera 20 is ensured, the defect missing detection or false detection caused by the poor quality of the battery piece image is prevented,
Or when the size of the battery piece is larger, and the size of the top light source 10 is limited due to the space limitation of the production line, the illumination effect on the edge of the battery piece is poor, and the quality of the battery piece image collected by the camera 20 is poor, so that the defect detection effect is affected. The first strip light source 40 serves as a light supplementing light source for supplementing light to the area with insufficient light of the battery piece. In this way, the battery cell scanning imaging device 100 can image a battery cell in a larger size range in a limited installation space.
Referring to fig. 1 and 2, in some embodiments, the battery slice scanning imaging device 100 further includes a first structural member 50. The first structure 50 comprises a first connection end 51 and a second connection end 52, the first connection end 51 being connected to the top light source 10 by the second side 13, and the second connection end 52 being connected to the first bar light source 40.
Specifically, the first connection end 51 is connected to the top light source 10 by the second side 13, so that the light emitting area of the first side 12 of the top light source 10 is not occupied, and the influence on the light emitted by the top light source 10 is avoided. The first connection end 51 may be fixedly connected to the top light source 10, and the second connection end 52 may be fixedly connected to the first bar light source 40. The first structural member 50 may also include a first structural body 53. The connection relation between the first connection end 51 and the second connection end 52 and the first structural body 53 is not limited, for example, the first connection end 51 and the second connection end 52 may be both fixed to the first structural body 53. Or the first connecting end 51 and the second connecting end 52 may be both movably connected to the first structural body 53, at this time, the relative position and the distance between the first strip-shaped light source 40 and the top surface light source 10 and the relative position and the distance between the first strip-shaped light source 40 and the predetermined position may be adjusted, so that the first strip-shaped light source 40 and the top surface light source 10 may better irradiate the battery plate. Or one end of the first connecting end 51 and one end of the second connecting end 52 are fixed on the first structural body 53, and the other end of the first connecting end is movably connected with the first structural body 53, at this time, the relative position or distance between the first strip-shaped light source 40 and the top surface light source 10 and the relative position or distance between the first strip-shaped light source 40 and the preset position can be adjusted, so that the first strip-shaped light source 40 and the top surface light source 10 can better irradiate the battery piece.
It should be noted that, a portion of the first structural member 50 may block the top light source 10, which may cause a portion of the light to fail to irradiate the battery piece. The second connecting end 52 is connected with the first strip light source 40, one side of the first strip light source 40 emitting light faces the preset position, and the first strip light source 40 emits light to the battery piece, so that light can be supplemented for shielding generated by the first structural member 50.
Referring to fig. 1 and 2, in some embodiments, the top light source 10 includes a first side 12 and a second side 13 opposite to each other, with the predetermined location being on the first side 12. The battery cell scanning imaging device 100 further includes a second bar light source 60 disposed on the second side 13.
Wherein the first side 12 is a side of the top light source 10 emitting light. The conveyor belt 101 is located on a first side 12 of the top light source 10. The predetermined location is located on the first side 12 of the top light source 10, and may specifically be a location on the conveyor belt 101 (as shown in position a in fig. 1). The second bar-shaped light source 60 emits light toward a predetermined position. The light emitted by the second strip light source 60 may be visible light or near infrared light of different spectral ranges.
Specifically, when the illumination condition of the top light source 10 on the battery plate is poor, for example, a part of the structure in the battery plate scanning imaging device 100 shields the top light source 10, a part of light may not illuminate the battery plate, so that the quality of the battery plate image collected by the camera 20 is poor, and the defect detection effect is affected. Therefore, the second strip light source 60 may be provided on the second side 13 at a position offset from the top light source 10 as a light supplementing light source for the battery piece scanning imaging device 100, and may supplement light to the area where the battery piece is not sufficiently illuminated without shielding the top light source 10. Thus, the quality of the battery piece image collected by the camera 20 is ensured, the defect missing detection or false detection caused by the poor quality of the battery piece image is prevented,
Or when the size of the battery piece is larger, and the size of the top light source 10 is limited due to the space limitation of the production line, the illumination effect on the edge of the battery piece is poor, and the quality of the battery piece image collected by the camera 20 is poor, so that the defect detection effect is affected. The second strip light source 60 is used as a light supplementing light source to supplement light to the area with insufficient light of the battery piece. In this way, the battery cell scanning imaging device 100 can image a battery cell in a larger size range in a limited installation space.
Referring to fig. 1 and 2, in some embodiments, the battery slice scanning imaging device 100 further includes a second structural member 70. The second structure 70 comprises a third connection end 71 and a fourth connection end 72, the third connection end 71 being connected to the top light source 10 by the second side 13, the fourth connection end 72 being connected to the second strip light source 60.
Specifically, the third connection end 71 may be fixedly connected to the top light source 10, and the fourth connection end 72 may be fixedly connected to the second bar light source 60. The second structural member 70 may also include a second structural body 73. The connection relation between the third connection end 71 and the fourth connection end 72 and the second structural body 73 is not limited, for example, the third connection end 71 and the fourth connection end 72 may be both fixed to the second structural body 73. Or the third connecting end 71 and the fourth connecting end 72 may be movably connected to the second structural body 73, at this time, the relative position and the distance between the second strip-shaped light source 60 and the top surface light source 10 and the relative position and the distance between the second strip-shaped light source 60 and the predetermined position may be adjusted, so that the second strip-shaped light source 60 and the top surface light source 10 may better irradiate the battery piece. Or one end of the third connecting end 71 and one end of the fourth connecting end 72 are fixed on the second structural body 73, and the other end of the third connecting end is movably connected to the second structural body 73, at this time, the relative position or distance between the second strip-shaped light source 60 and the top surface light source 10 and the relative position or distance between the second strip-shaped light source 60 and the preset position can be adjusted, so that the second strip-shaped light source 60 and the top surface light source 10 can better irradiate the battery piece.
As shown in fig. 2, the first connection end 51 and the third connection end 71 are connected to the second side 13 by a connection member 80. The connector 80 is used to secure the camera 20. The connection member 80 may include a fifth connection end 81, a sixth connection end 82, and a seventh connection end 83, the fifth connection end 81 being connected to the first connection end 51, the sixth connection end 82 being connected to the third connection end 71, and the seventh connection end 83 being connected to the camera 20 to fix the camera 20 such that one of the camera 20 and the lens 30 is located in the through hole 11.
In some embodiments, the camera 20 is an area-array camera, the camera 20 is used for receiving light reflected by a battery piece stationary at a predetermined position and passing through the lens 30 for imaging, or the camera 20 is a line-array camera, the camera 20 is used for receiving light reflected by a battery piece moving to a predetermined position and passing through the lens 30 for imaging.
The camera 20 may be a black-and-white camera or a color camera, and specifically may be a complementary metal oxide semiconductor (Complementary Metal Oxide Semiconductor, CMOS) camera or a charge coupled device (Charge Coupled Device, CCD) camera. The CMOS camera has the advantages of low power consumption, low cost, high integration level and the like, while the CCD camera has the advantages of high image quality, high resolution, high signal to noise ratio and the like, and can be specifically selected according to actual application scenes and requirements.
Specifically, the area camera can directly acquire two-dimensional image information. When an area camera is used to capture an image of a battery cell, the battery cell remains stationary as the battery cell moves to a predetermined position along with the conveyor belt 101, and the camera 20 receives light reflected by the battery cell stationary at the predetermined position and passing through the lens 30 to image the battery cell, resulting in a battery cell image.
When the linear array camera works, the relative motion of the photographed sample and the linear array camera needs to be ensured so as to acquire a complete and clear image. When the linear camera is used to collect images of the battery, the different positions of the battery move to the predetermined positions along with the conveyor belt 101, and the camera 20 receives the light reflected by the moving battery and passing through the lens 30 to image the different positions of the battery, so as to obtain a complete battery image.
Referring to fig. 8, the embodiment of the application further provides a system 1000 for detecting defects of a battery piece. The battery cell defect detection system 1000 includes the battery cell scanning imaging apparatus 100 and the defect detection apparatus 200 of any of the above embodiments. The defect detecting device 200 is used for detecting defects according to the images acquired by the battery piece scanning imaging device 100.
In the battery cell scanning imaging device 100 and the battery cell defect detecting system 1000 according to the embodiment of the application, the battery cell is located at a predetermined position, the top light source 10 emits light to the predetermined position, the camera 20 or the lens 30 is located in the through hole 11 of the top light source 10, and the camera 20 receives the light reflected by the battery cell and passing through the lens 30 to image. In this way, the integrity of the battery piece image collected by the camera 20 can be ensured, and the defect detection on the battery piece can be facilitated.
In the description of the present application, 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", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings are merely for convenience in describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present application. Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include one or more features. In the description of the present application, the meaning of "a plurality" is two or more, unless explicitly defined otherwise.
In the description of the present application, unless explicitly stated or limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected, mechanically connected, electrically connected, directly connected, indirectly connected via an intervening medium, or in communication between two elements or in an interaction relationship between two elements. The specific meaning of the above terms in the present application can be understood by those of ordinary skill in the art according to the specific circumstances.
In the present application, unless expressly stated or limited otherwise, a first feature "above" or "below" a second feature may include both the first and second features being in direct contact, as well as the first and second features not being in direct contact but being in contact with each other through additional features therebetween. Moreover, a first feature being "above," "over" and "on" a second feature includes the first feature being directly above and obliquely above the second feature, or simply indicating that the first feature is higher in level than the second feature. The first feature being "under", "below" and "beneath" the second feature includes the first feature being directly under and obliquely below the second feature, or simply means that the first feature is less level than the second feature.
The above disclosure provides many different embodiments, or examples, for implementing different structures of the application. The foregoing description of specific example components and arrangements has been presented to simplify the present disclosure. They are, of course, merely examples and are not intended to limit the application. Furthermore, the present application may repeat reference numerals and/or letters in the various examples, which are for the purpose of brevity and clarity, and which do not themselves indicate the relationship between the various embodiments and/or arrangements discussed. In addition, the present application provides examples of various specific processes and materials, but one of ordinary skill in the art will recognize the application of other processes and/or the use of other materials.
In the description of the present specification, reference is made to the terms "one embodiment," "some embodiments," "illustrative embodiments," "examples," "particular examples," "some examples," etc., meaning that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the application. In this specification, schematic representations of the above terms do not necessarily refer to the same embodiments or examples. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.
Although embodiments of the present application have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made therein without departing from the spirit and scope of the application as defined by the appended claims and their equivalents.
Claims (10)
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| CN202323661389.8U CN222364928U (en) | 2023-12-29 | 2023-12-29 | Battery piece scanning imaging device and battery piece defect detection system |
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| CN202323661389.8U CN222364928U (en) | 2023-12-29 | 2023-12-29 | Battery piece scanning imaging device and battery piece defect detection system |
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