Battery piece scanning imaging device and battery piece defect detection system

Abstract

The utility model discloses a battery piece scanning imaging device and a battery piece defect detection system. The cell scanning imaging device comprises a top surface light source, a camera and a lens. The top surface light source is used for emitting light to a preset position. The camera is connected with the lens and used for receiving light reflected by the battery piece at the preset position and penetrating through the lens for imaging. The top surface light source is provided with a through hole, and one of the camera and the lens is located in the through hole. Therefore, the completeness of the battery piece image acquired by the camera can be ensured, and defect detection on the battery piece is facilitated.

Description

Technical Field

[0001] The present application relates to the technical field of solar cells, and in particular to a cell scanning imaging device and a cell defect detection system. Background Art

[0002] In the production process of crystalline silicon solar cells, defects such as fragments, missing corners, and broken edges may occur, which will not only limit the photoelectric conversion efficiency and service life of the cells, but also cause the cells to be downgraded or scrapped. Broken cells will remain in the template, resulting in large-scale cell fragments, thus affecting the production efficiency of the factory. Therefore, how to achieve cell defect detection is an important issue in the cell production process. Utility Model Content

[0003] The embodiments of the present application provide a battery cell scanning imaging device and a battery cell defect detection system to solve at least one of the above-mentioned technical problems.

[0004] The cell scanning imaging device of the embodiment of the present application comprises a top light source, a camera and a lens, wherein the top light source is used to emit light to a predetermined position, and the camera is connected to the lens to receive light reflected by the cell at the predetermined position and passing through the lens to form an image;

[0005] The top light source is provided with a through hole, and one of the camera and the lens is located in the through hole.

[0006] In some embodiments, the top light source includes a first side and a second side opposite to each other, and the predetermined position is located on the first side; wherein:

[0007] The lens is located in the through hole, and the camera is located on the second side; or

[0008] The camera is located in the through hole, and the lens is located on the first side.

[0009] In some embodiments, a central axis of the through hole is consistent with an optical axis of the camera and the lens.

[0010] In some embodiments, the top light source emits light toward the predetermined position in an overexposed manner.

[0011] In some embodiments, the top light source includes a first side and a second side opposite to each other, and the predetermined position is located on the first side;

[0012] The cell sheet scanning imaging device further comprises a first bar-shaped light source arranged on the first side, and the first bar-shaped light source is located between the top surface light source and the predetermined position.

[0013] In some embodiments, the cell scanning imaging device further includes a first structural member, the first structural member includes a first connecting end and a second connecting end, the first connecting end is connected to the top light source via the second side, and the second connecting end is connected to the first strip light source.

[0014] In some embodiments, the top light source includes a first side and a second side opposite to each other, and the predetermined position is located on the first side;

[0015] The cell sheet scanning imaging device further includes a second strip light source arranged on the second side.

[0016] In some embodiments, the cell scanning imaging device further includes a second structural member, the second structural member includes a third connecting end and a fourth connecting end, the third connecting end is connected to the top light source via the second side, and the fourth connecting end is connected to the second strip light source.

[0017] In some embodiments, the camera is an area array camera, and the camera is used to receive light reflected by the battery sheet stationary at the predetermined position and passing through the lens to form an image; or

[0018] The camera is a line array camera, and the camera is used to receive the light reflected by the battery sheet moving to the predetermined position and passing through the lens to form an image.

[0019] The battery cell defect detection system of the embodiment of the present application includes:

[0020] A cell scanning imaging device according to any one of the above embodiments; and

[0021] A defect detection device is used to perform defect detection based on the image obtained by the battery cell scanning imaging device.

[0022] In the cell scanning imaging device and cell defect detection system of the embodiment of the present application, the cell is located at a predetermined position, the top light source emits light to the predetermined position, the camera or lens is located in the through hole of the top light source, and the camera receives the light reflected by the cell and passing through the lens to form an image. In this way, the integrity of the cell image collected by the camera can be guaranteed, which facilitates the defect detection of the cell.

[0023] Additional aspects and advantages of the present application will be given in part in the description below, and in part will become apparent from the description below, or will be learned through the practice of the present application. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] In order to more clearly illustrate the technical solutions in the embodiments of the present application or related technologies, the following briefly introduces the drawings required for use in the embodiments or related technical descriptions. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on the structures shown in these drawings without creative work. Among them:

[0025] Figure 1 It is a structural schematic diagram of a battery cell scanning imaging device from one viewing angle in certain embodiments of the present application;

[0026] Figure 2 is a schematic structural diagram of a cell scanning imaging device according to certain embodiments of the present application from another perspective;

[0027] Figure 3 is a schematic diagram of an image of a normal battery cell captured by a camera in certain embodiments of the present application;

[0028] Figure 4 is a schematic diagram of an image of a defective battery cell captured by a camera in certain embodiments of the present application;

[0029] Figure 5 is a schematic diagram of an image of a defective battery cell captured by a camera in certain embodiments of the present application;

[0030] Figure 6 is a schematic diagram of a structure in which a lens is located in a through hole in some embodiments of the present application;

[0031] Figure 7 is a schematic diagram of a structure in which a camera is located in a through hole in some embodiments of the present application;

[0032] Figure 8 It is a module schematic diagram of a battery cell defect detection system in certain embodiments of the present application.

[0033] Description of reference numerals:

[0034] Battery cell scanning imaging device 100, top light source 10, through hole 11, first side 12, second side 13, camera 20, lens 30, first strip light source 40, first structural member 50, first connecting end 51, second connecting end 52, first structural body 53, second strip light source 60, second structural member 70, third connecting end 71, fourth connecting end 72, second structural body 73, connecting member 80, fifth connecting end 81, sixth connecting end 82, seventh connecting end 83, conveyor belt 101, defect detection device 200, battery cell defect detection system 1000. DETAILED DESCRIPTION

[0035] The embodiments of the present application are described in detail below, and examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals represent the same or similar elements or elements having the same or similar functions from beginning to end. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present application, and cannot be understood as limiting the present application.

[0036] See also Figure 1 and Figure 2 , the embodiment of the present application provides a cell scanning imaging device 100. The cell scanning imaging device 100 includes a top light source 10, a camera 20 and a lens 30. The top light source 10 is used to emit light to a predetermined position. The camera 20 is connected to the lens 30, and is used to receive light reflected by the cell at the 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 located in the through hole 11.

[0037] In the cell scanning imaging device 100 of the embodiment of the present application, the 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 cell and passing through the lens 30 to form an image. In this way, the integrity of the cell image collected by the camera 20 can be ensured, which facilitates defect detection of the cell.

[0038] Specifically, the cell may be a crystalline silicon solar cell. The top light source 10 may be a circular, square or other surface light source of any other shape, without limitation. Figure 1 As shown, a rectangular surface light source can be used as the top light source 10. The light emitted by the top light source 10 can be visible light or near-infrared light of different spectral bands. A through hole 11 is provided 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 is at least partially located in the through hole 11. For example, the lens 30 can be partially or completely located in the through hole 11, and the camera 20 is located outside the through hole 11; or the camera 20 can be partially or completely located in the through hole 11, and the lens 30 is located outside the through hole 11. When the camera 20 images the battery cell at a predetermined position, the battery cell can be in a stationary state or in a moving state.

[0039] When the cell is located at a predetermined position, the light emitted by the top light source 10 irradiates the cell, is reflected by the cell, and then passes through the lens 30 to the camera 20, thereby imaging the cell. One of the camera 20 and the lens 30 is located in the through hole 11, and the top light source 10 does not block the field of view of the camera 20, so that the cell can be completely imaged in the camera 20. In this way, the integrity of the cell image collected by the camera 20 can be guaranteed, which is convenient for defect detection of the cell, and prevents defect omission or misdetection caused by incomplete cell images.

[0040] The cell scanning imaging device 100 of the embodiment of the present application can be adapted to an online or offline machine, meet the production mode of the actual machine, and can image a cell that is stationary at a predetermined position or moves to a predetermined position, and can detect defects such as fragments, missing corners, and broken edges of the cell in the corresponding process section. Figure 3 and Figure 4 ,from Figure 4 Chip or corner defects can be detected in Figure 3 and Figure 5 ,from Figure 5 The chipping defect can be detected in the process. At the same time, the collected image can be output to the host computer through the data interface, and then the defect detection and identification can be carried out in conjunction with the relevant software system, and then the relevant detection results can be fed back to the relevant execution agency (such as battery cell production equipment or battery cell detection equipment) for processing to ensure that no defective cells flow out of the detection station.

[0041] See also Figure 1 and Figure 2 In some embodiments, the top light source 10 includes a first side 12 and a second side 13 opposite to each other, and the predetermined position is located on the first side 12. The lens 30 is located in the through hole 11, and the camera 20 is located on the second side 13; or the camera 20 is located in the through hole 11, and the lens 30 is located on the first side 12.

[0042] Specifically, the first side 12 is the side from which the top light source 10 emits light. The predetermined position is located on the first side 12 of the top light source 10, and a position on the conveyor belt 101 of the production line can be used as the predetermined position (e.g. Figure 1 The conveyor belt 101 is located at the first side 12 of the top light source 10. It can be understood that in order to better emit the light of the top light source 10 to the battery sheet at the predetermined position, the predetermined position should be located within the illumination field of the top light source 10. The camera 20 is connected to the lens 30, and the lens 30 is located on the side of the camera 20 close to the predetermined position, as shown in FIG. Figure 6 As shown, the lens 30 can be located in the through hole 11, at which time, the camera 20 is located on the second side 13 of the top light source 10; or Figure 7As shown, the camera 20 can be located in the through hole 11 , and in this case, the lens 30 is located at the first side 12 of the top light source 10 .

[0043] In some embodiments, the central axis of the through hole 11 is consistent with the optical axis of the camera 20 and the lens 30 .

[0044] Specifically, the through hole 11 is located in the middle of the top light source 10, and the central axis of the through hole 11 is consistent with the optical axis of the camera 20 and the lens 30, that is, the optical axis of the camera 20 and the lens 30 is located on the central axis of the top light source 10. In addition, the predetermined position is located within the illumination 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 cell located at the predetermined position, so that the integrity of the cell image collected by the camera 20 can be guaranteed, and the defect omission or misdetection caused by the incomplete cell image can be prevented.

[0045] In some embodiments, the top light source 10 emits light to a predetermined position in an overexposed manner.

[0046] Specifically, the top light source 10 is kept on, and emits light to the predetermined position in an overexposed manner, and the light irradiates the battery cell, and the area where the battery cell is located in the image captured by the camera 20 is overexposed. Figures 3 to 5 As shown in the figure, the white area is the overexposed cell, and the black area is the background. When there are defects such as fragments, missing corners, and broken edges in the cell, the defective area will not be overexposed and will be imaged as a black area. The contrast between the white area and the black area is obvious. In this way, the overexposed image of the cell can clearly show the defects of the cell, thereby reducing the difficulty of subsequent defect detection algorithm development and reducing the difficulty of cell defect detection.

[0047] See also Figure 1 and Figure 2 In some embodiments, the top light source 10 includes a first side 12 and a second side 13 opposite to each other, and the predetermined position is located on the first side 12. The cell scanning imaging device 100 also includes a first strip light source 40 disposed on the first side 12, and the first strip light source 40 is located between the top light source 10 and the predetermined position.

[0048] The first side 12 is the side from which the top light source 10 emits light. The conveyor belt 101 is located on the first side 12 of the top light source 10. The predetermined position is located on the first side 12 of the top light source 10, and can be a position on the conveyor belt 101 (e.g. Figure 1 The first bar-shaped light source 40 emits light toward the predetermined position. The light emitted by the first bar-shaped light source 40 can be visible light or near-infrared light of different spectrums.

[0049] Specifically, when the top light source 10 does not illuminate the cell well, for example, some structures in the cell scanning imaging device 100 block the top light source 10, which may cause part of the light to fail to illuminate the cell, resulting in poor quality of the cell image captured by the camera 20, affecting the defect detection effect. Therefore, a first strip light source 40 can be set on the first side 12 between the top light source 10 and the predetermined position to serve as a fill light source for the cell scanning imaging device 100 to fill in the insufficiently lit areas of the cell. In this way, the quality of the cell image captured by the camera 20 is guaranteed, and defects are prevented from being missed or misdetected due to poor cell image quality.

[0050] Alternatively, when the size of the cell is large, 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 cell is poor, which will also cause the quality of the cell image collected by the camera 20 to be poor, affecting the defect detection effect. The first strip light source 40 is used as a fill light source to fill in the insufficient light area of ​​the cell. In this way, the cell scanning imaging device 100 can image cells within a larger size range within a limited installation space.

[0051] See also Figure 1 and Figure 2 In some embodiments, the cell scanning imaging device 100 further includes a first structural member 50. The first structural member 50 includes a first connecting end 51 and a second connecting end 52. The first connecting end 51 is connected to the top light source 10 via the second side 13, and the second connecting end 52 is connected to the first strip light source 40.

[0052] Specifically, the first connection end 51 is connected to the top light source 10 by the second side 13, and does not need to occupy the light emitting area of ​​the first side 12 of the top light source 10, so as to avoid affecting the light emitted by the top light source 10. The first connection end 51 can be fixedly connected to the top light source 10, and the second connection end 52 can be fixedly connected to the first bar light source 40. The first structural member 50 may also include a first structural body 53. There is no restriction on the connection relationship between the first connection end 51 and the second connection end 52 and the first structural body 53. For example, the first connection end 51 and the second connection end 52 can both be fixed to the first structural body 53. Or the first connection end 51 and the second connection end 52 can both be movably connected to the first structural body 53. At this time, the relative position and distance between the first bar light source 40 and the top light source 10, and the relative position and distance between the first bar light source 40 and the predetermined position can be adjusted, so that the first bar light source 40 and the top light source 10 can better irradiate the battery sheet. Or one end of the first connection end 51 and the second connection end 52 is fixed to the first structural body 53, and the other end is movably connected to the first structural body 53. At this time, the relative position or distance between the first strip light source 40 and the top light source 10 can be adjusted, and the relative position or distance between the first strip light source 40 and the predetermined position can be adjusted, so that the first strip light source 40 and the top light source 10 can better illuminate the battery cell.

[0053] It should be noted that part of the first structural member 50 may block the top light source 10, which may cause part of the light to fail to irradiate the battery cell. The second connecting end 52 is connected to the first strip light source 40, and the side of the first strip light source 40 emitting light faces the predetermined position. The first strip light source 40 emits light to the battery cell, which can fill in the shading caused by the first structural member 50.

[0054] See also Figure 1 and Figure 2 In some embodiments, the top light source 10 includes a first side 12 and a second side 13 opposite to each other, and the predetermined position is located on the first side 12 . The cell scanning imaging device 100 further includes a second bar light source 60 disposed on the second side 13 .

[0055] The first side 12 is the side from which the top light source 10 emits light. The conveyor belt 101 is located on the first side 12 of the top light source 10. The predetermined position is located on the first side 12 of the top light source 10, and can be a position on the conveyor belt 101 (e.g. Figure 1 The second bar light source 60 emits light toward the predetermined position. The light emitted by the second bar light source 60 can be visible light or near infrared light of different spectrums.

[0056] Specifically, when the top light source 10 does not illuminate the cell well, for example, some structures in the cell scanning imaging device 100 block the top light source 10, which may cause part of the light to fail to illuminate the cell, resulting in poor quality of the cell image captured by the camera 20, affecting the defect detection effect. Therefore, a second strip light source 60 can be set on the second side 13, at a position offset from the top light source 10, as a fill light source for the cell scanning imaging device 100, to fill in the insufficiently lit areas of the cell without blocking the top light source 10. In this way, the quality of the cell image captured by the camera 20 is guaranteed, and defects are prevented from being missed or misdetected due to poor cell image quality.

[0057] Alternatively, when the size of the cell is large, 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 cell is poor, which will also lead to poor quality of the cell image collected by the camera 20, affecting the defect detection effect. The second strip light source 60 is used as a fill light source to fill in the insufficient light area of ​​the cell. In this way, the cell scanning imaging device 100 can image cells within a larger size range within a limited installation space.

[0058] See also Figure 1 and Figure 2 In some embodiments, the cell scanning imaging device 100 further includes a second structural member 70. The second structural member 70 includes a third connecting end 71 and a fourth connecting end 72. The third connecting end 71 is connected to the top light source 10 via the second side 13, and the fourth connecting end 72 is connected to the second strip light source 60.

[0059] Specifically, the third connection end 71 can be fixedly connected to the top light source 10, and the fourth connection end 72 can be fixedly connected to the second strip light source 60. The second structural member 70 can also include a second structural body 73. There is no restriction on the connection relationship between the third connection end 71 and the fourth connection end 72 and the second structural body 73. For example, the third connection end 71 and the fourth connection end 72 can both be fixed to the second structural body 73. Or the third connection end 71 and the fourth connection end 72 can both be movably connected to the second structural body 73. In this case, the relative position and distance between the second strip light source 60 and the top light source 10, as well as the relative position and distance between the second strip light source 60 and the predetermined position can be adjusted, so that the second strip light source 60 and the top light source 10 can better illuminate the battery cell. Or one end of the third connection end 71 and the fourth connection end 72 is fixed to the second structural body 73, and the other end is movably connected to the second structural body 73. At this time, the relative position or distance between the second strip light source 60 and the top light source 10 can be adjusted, and the relative position or distance between the second strip light source 60 and the predetermined position can be adjusted, so that the second strip light source 60 and the top light source 10 can better illuminate the battery cell.

[0060] It should be noted that if Figure 2 As shown, the first connection end 51 and the third connection end 71 are connected at the second side 13 through a connection member 80. The connection member 80 is used to fix 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, wherein the fifth connection end 81 is connected to the first connection end 51; the sixth connection end 82 is connected to the third connection end 71; and the seventh connection end 83 is connected to the camera 20 to fix the camera 20 so that one of the camera 20 and the lens 30 is located in the through hole 11.

[0061] In some embodiments, the camera 20 is an area array camera, which is used to receive light reflected by a battery cell stationary at a predetermined position and passing through the lens 30 to form an image; or the camera 20 is a line array camera, which is used to receive light reflected by a battery cell moving to a predetermined position and passing through the lens 30 to form an image.

[0062] The camera 20 may be a black and white camera or a color camera, and may be a complementary metal oxide semiconductor (CMOS) camera or a charge coupled device (CCD) camera. CMOS cameras have the advantages of low power consumption, low cost and high integration, while CCD cameras have the advantages of high image quality, high resolution and high signal-to-noise ratio, and may be selected according to actual application scenarios and requirements.

[0063] Specifically, the area array camera can directly obtain two-dimensional image information. When the area array camera is used to collect the image of the battery cell, the battery cell remains stationary when it moves to the predetermined position with the conveyor belt 101, and the camera 20 receives the light reflected by the battery cell stationary at the predetermined position and passes through the lens 30 to form an image, thereby obtaining the battery cell image.

[0064] When the line array camera is working, it is necessary to ensure that the sample being photographed moves relative to the line array camera to capture a complete and clear image. When the line array camera is used to capture the image of the cell, different positions of the cell move to the predetermined position with the conveyor belt 101, and the camera 20 receives the light reflected by the moving cell and passes through the lens 30 to image different positions of the cell, and finally obtains a complete cell image.

[0065] See also Figure 8 The embodiment of the present application also provides a cell defect detection system 1000. The cell defect detection system 1000 includes the cell scanning imaging device 100 and the defect detection device 200 of any of the above embodiments. The defect detection device 200 is used to perform defect detection based on the image acquired by the cell scanning imaging device 100.

[0066] In the cell scanning imaging device 100 and the cell defect detection system 1000 of the embodiment of the present application, the 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 cell and passing through the lens 30 to form an image. In this way, the integrity of the cell image collected by the camera 20 can be guaranteed, which facilitates the defect detection of the cell.

[0067] In the description of the present application, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present application. In addition, the terms "first" and "second" are only used for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more features. In the description of the present application, the meaning of "multiple" is two or more, unless otherwise clearly and specifically defined.

[0068] In the description of this application, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0069] In the present application, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may include that the first and second features are in direct contact, or may include that the first and second features are not in direct contact but are in contact through another feature between them. Moreover, a first feature being "above", "above" and "above" a second feature includes that the first feature is directly above and obliquely above the second feature, or simply indicates that the first feature is higher in level than the second feature. A first feature being "below", "below" and "below" a second feature includes that the first feature is directly below and obliquely below the second feature, or simply indicates that the first feature is lower in level than the second feature.

[0070] The disclosure above provides many different embodiments or examples to realize the different structures of the present application. In order to simplify the disclosure of the present application, the parts and settings of specific examples are described above. Of course, they are only examples, and the purpose is not to limit the present application. In addition, the present application can repeat reference numbers and / or reference letters in different examples, and this repetition is for the purpose of simplification and clarity, which itself does not indicate the relationship between the various embodiments and / or settings discussed. In addition, the present application provides various specific processes and examples of materials, but those of ordinary skill in the art can appreciate the application of other processes and / or the use of other materials.

[0071] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "illustrative embodiments", "example", "specific example", "some examples", etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiments or examples are included in at least one embodiment or example of the present application. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner.

[0072] Although the embodiments of the present application have been shown and described above, those skilled in the art will appreciate that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present application, and that the scope of the present application is defined by the claims and their equivalents.

Claims

1. A battery cell scanning imaging device, characterized in that: It includes a top light source, a camera and a lens, wherein the top light source is used to emit light to a predetermined position, and the camera is connected to the lens to receive light reflected by the battery sheet at the predetermined position and passing through the lens to form an image; The top light source is provided with a through hole, and one of the camera and the lens is located in the through hole.

2. The battery cell scanning imaging device according to claim 1, characterized in that: The top light source comprises a first side and a second side opposite to each other, and the predetermined position is located on the first side; wherein: The lens is located in the through hole, and the camera is located on the second side; or The camera is located in the through hole, and the lens is located on the first side.

3. The battery cell scanning imaging device according to claim 1, characterized in that: The central axis of the through hole is consistent with the optical axes of the camera and the lens.

4. The battery cell scanning imaging device according to claim 1, characterized in that: The top light source emits light toward the predetermined position in an overexposed manner.

5. The battery cell scanning imaging device according to claim 1, characterized in that: The top light source comprises a first side and a second side opposite to each other, and the predetermined position is located on the first side; The cell sheet scanning imaging device further comprises a first bar-shaped light source arranged on the first side, and the first bar-shaped light source is located between the top surface light source and the predetermined position.

6. The battery cell scanning imaging device according to claim 5, characterized in that: The cell 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 to the top surface light source via the second side, and the second connecting end is connected to the first strip light source.

7. The battery cell scanning imaging device according to claim 1, characterized in that: The top light source comprises a first side and a second side opposite to each other, and the predetermined position is located on the first side; The cell sheet scanning imaging device further includes a second strip light source arranged on the second side.

8. The battery cell scanning imaging device according to claim 7, characterized in that: The cell scanning imaging device also includes a second structural member, the second structural member includes a third connecting end and a fourth connecting end, the third connecting end is connected to the top light source through the second side, and the fourth connecting end is connected to the second strip light source.

9. The cell scanning imaging device according to claim 1, characterized in that: The camera is an area array camera, and the camera is used to receive light reflected by the battery sheet stationary at the predetermined position and passing through the lens to form an image; or The camera is a line array camera, and the camera is used to receive the light reflected by the battery sheet moving to the predetermined position and passing through the lens to form an image.

10. A battery cell defect detection system, characterized in that: include: The cell scanning imaging device according to any one of claims 1 to 9; and A defect detection device is used to perform defect detection based on the image obtained by the battery cell scanning imaging device.

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