Battery piece detection device

Abstract

The utility model relates to the technical field of solar cell production equipment, in particular to a cell detection device, and aims to solve the problem that the interior of a cell cannot be detected when the back of the cell is polished. The device comprises a shielding assembly, a camera assembly and a light source assembly. The shielding assembly, the camera assembly and the light source assembly are all arranged above the battery piece; the shielding assembly comprises a baffle, the baffle comprises a light shielding plate, and the light shielding plate can move in the conveying direction of the battery pieces and the direction perpendicular to the battery pieces; the light source assembly emits light to irradiate the battery piece, and the camera assembly receives the light on the side, away from the light source assembly, of the shading plate to obtain images. Interference light is reduced by adjusting the position of the baffle, the interior of the battery piece is detected from the upper portion of the battery piece in an infrared light irradiation mode, the device has the advantages of being high in adjusting precision and easy to use, and the problem that detection cannot be achieved due to the fact that light cannot be emitted on the back face is solved.

Description

Technical Field

[0001] The utility model relates to the technical field of solar cell production equipment, in particular to a cell sheet detection device. Background Art

[0002] A solar cell is a device that directly converts light energy into electrical energy through the photoelectric effect or photochemical reaction. The main solar cell technologies can be subdivided into monocrystalline silicon solar cells, polycrystalline silicon solar cells, thin-film solar cells, organic solar cells, perovskite solar cells, PERC solar cells, HJT solar cells, TOPCon solar cells, and bifacial solar cells. Among them, HJT solar cells have the advantages of high efficiency, high temperature performance, low light response, long life, and bifacial power generation. HJT detection mainly uses PL detection equipment in the back-end part, while some cells made by the front-end process are extremely unstable in the air and may be oxidized in a short time, so they need to be stored in a vacuum nitrogen cabinet, which requires a lot of financial and material resources. Even if the cell is not oxidized, a high-power laser is required to achieve detection when using PL detection equipment. The use of high-power lasers requires long-term safety training for operators, and the cost of use is also very high.

[0003] The infrared light penetration inspection method is to illuminate the bottom of the cell to conduct the inspection. However, for the runway where the cell positioning accuracy is high and openings cannot be made, the cell is blocked by the belt during the transportation and inspection process, and it is difficult to set a light source under the cell to penetrate, making it difficult to conduct inspection. That is, there is a problem that the inside of the cell cannot be inspected when the back of the cell cannot be illuminated. Utility Model Content

[0004] The utility model aims to provide a battery cell detection device to solve the problem that the internal detection of the battery cell cannot be performed when the back of the battery cell cannot be illuminated.

[0005] In order to solve the above technical problems, the technical solution provided by the utility model is:

[0006] The utility model provides a battery cell detection device, comprising a shielding component, a camera component and a light source component; the shielding component, the camera component and the light source component are all arranged above the battery cell; the shielding component comprises a baffle, the baffle comprises a shading plate, and the shading plate can move along the conveying direction of the battery cell and in a direction perpendicular to the battery cell; the light source component emits light to illuminate the battery cell, and the camera component receives light on a side of the shading plate away from the light source component to acquire an image.

[0007] Furthermore, the battery cell detection device also includes a basic component, and the basic component includes a first frame; the baffle is slidably connected to the first frame.

[0008] Furthermore, the shielding assembly also includes a screw rod, which is rotatably mounted on the first frame; the screw rod is inserted into the baffle and screwed with the baffle; the screw rod rotates around its own axis to drive the baffle to move along the conveying direction of the battery cell.

[0009] Furthermore, the baffle also includes a connecting rod, a first connecting plate and a second connecting plate; the connecting rod is slidably connected to the first frame, the first connecting plate is connected to the connecting rod, the shading plate is connected to the first connecting plate, and the second connecting plate is connected to the connecting rod and screwed with the screw rod; the first connecting plate is provided with a first long hole extending in the vertical direction, and the shading plate is bolted to the first connecting plate through the first long hole.

[0010] Furthermore, the baffle assembly also includes a knob, and the knob is connected to the screw rod.

[0011] Furthermore, the basic component also includes a guide rail unit, which includes a first linear guide rail, a positioning module and a limiting connecting plate; the connecting rod is connected to the slider of the first linear guide rail, the positioning module is slidably installed on the guide rail of the first linear guide rail and clamps the guide rail of the first linear guide rail, and the limiting connecting plate is connected to the positioning module and the slider of the first linear guide rail.

[0012] Furthermore, the positioning module includes a positioning block and a clamping block, and the two clamping blocks are slidably mounted on the positioning block; the positioning block is connected to the limiting connecting plate, and the two clamping blocks move toward each other to clamp the guide rail of the first linear guide rail.

[0013] Furthermore, the camera assembly includes a camera, a connecting block and a support plate; the camera is connected to the connecting block, the support plate is provided with a second long hole extending in the vertical direction, a plurality of the second long holes are arranged in the vertical direction, and the connecting block is bolted to the support plate through the second long hole.

[0014] Furthermore, the light source assembly includes a light source, a swing plate and a connecting frame; the light source is connected to the swing plate, the swing plate is provided with a center hole and an arc groove, and the arc groove is coaxial with the center hole; the swing plate is hinged to the connecting frame through the center hole and can swing along the arc groove.

[0015] Furthermore, the light source assembly further comprises an adapter plate, the connection frame is slidably connected to the adapter plate and can move in a vertical direction, and the adapter plate can move in a conveying direction of the battery cell.

[0016] Based on the above technical solutions, the technical effects that can be achieved by the utility model are:

[0017] The battery cell detection device provided by the utility model includes a shielding component, a camera component and a light source component; the shielding component, the camera component and the light source component are all arranged above the battery cell; the shielding component includes a baffle, the baffle includes a shading plate, and the shading plate can move along the conveying direction of the battery cell and in a direction perpendicular to the battery cell; the light source component emits light to illuminate the battery cell, and the camera component receives light on the side of the shading plate away from the light source component to obtain an image.

[0018] The battery cell detection device provided by the utility model emits infrared light at a set angle through a light source component. After the light hits the battery cell, part of the light is refracted by adjusting the shading plate and enters the battery cell and is totally reflected inside the battery cell. Part of the light is reflected on the upper surface of the battery cell and blocked by the baffle to prevent this part of the light from reaching the camera component and affecting the imaging effect. When the light entering the battery cell encounters defects such as hidden cracks, irregular refraction occurs, so that part of the light reaches the camera component and the camera component obtains an image of the defect, thereby achieving the purpose of detection. For the situation where the battery cell has special requirements for the transport runway after cleaning and velveting, which makes it impossible to illuminate the back of the battery cell, and the back of the battery cell cannot be illuminated due to the limitations of existing equipment, the utility model obtains images by penetrating light from above the battery cell, and blocks interfering light through a shading plate with an adjustable position, thereby ensuring the imaging effect, improving the detection quality and reducing the detection difficulty.

[0019] In addition, in comparison, photoluminescence detection requires the chemical state of the cell surface layer to be stable in order to work, and the energy of the light emitted by the PL laser required by the cell under ideal conditions without oxidation is very large, so its equipment cost and use cost are both high and there are certain safety hazards. The cell detection device provided by the utility model has better economy and equipment reliability due to its low light source cost and simple structure, and avoids the danger of using photoluminescence detection equipment and the need for long-term safety training for operators. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the specific implementation methods of the utility model or the technical solutions in the prior art, the drawings required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0021] Figure 1 A schematic diagram of the structure of a battery cell detection device provided by an embodiment of the utility model;

[0022] Figure 2 A front view of a battery cell detection device provided by an embodiment of the utility model;

[0023] Figure 3 Schematic diagram of the structure of the shielding component;

[0024] Figure 4 is a schematic diagram of the structure of a camera assembly;

[0025] Figure 5 is a structural schematic diagram of a light source assembly;

[0026] Figure 6 A schematic diagram of the structure of the basic components;

[0027] Figure 7 is a structural schematic diagram of a guide rail unit;

[0028] Figure 8 It is a structural diagram of the positioning module;

[0029] Fig. 9 is a schematic diagram of total reflection;

[0030] Fig.10 A schematic diagram of the principle of a battery cell detection device provided by an embodiment of the utility model;

[0031] Fig.11 Another schematic diagram of the structure of the battery cell detection device provided by the embodiment of the utility model;

[0032] Fig.12 Another structural schematic diagram of the battery cell detection device provided by an embodiment of the utility model.

[0033] Icon: 100-shading component; 200-camera component; 300-light source component; 400-basic component; 500-box; 110-baffle; 120-screw rod; 130-knob; 111-shading plate; 112-connecting rod; 113-first connecting plate; 114-second connecting plate; 101-first long hole; 210-camera; 220-connecting block; 230-support plate; 201-second Two long holes; 310-light source; 320-swinging plate; 330-connecting frame; 340-adapter plate; 301-center hole; 302-arc groove; 410-first frame; 420-guide rail unit; 430-second frame; 421-first linear guide rail; 422-positioning module; 423-limiting connecting plate; 401-positioning block; 402-clamping block; 403-bidirectional screw; 10-battery cell. DETAILED DESCRIPTION

[0034] In order to make the purpose, technical scheme and advantages of the embodiments of the utility model clearer, the technical scheme in the embodiments of the utility model will be clearly and completely described below in conjunction with the drawings in the embodiments of the utility model. Obviously, the described embodiments are part of the embodiments of the utility model, not all of the embodiments. Generally, the components of the embodiments of the utility model described and shown in the drawings here can be arranged and designed in various different configurations.

[0035] In conjunction with the accompanying drawings, some embodiments of the present invention are described in detail below. In the absence of conflict, the following embodiments and features in the embodiments can be combined with each other.

[0036] The infrared light penetration inspection method is to illuminate the bottom of the cell to conduct the inspection. However, for the runway where the cell positioning accuracy is high and openings cannot be made, the cell is blocked by the belt during the transportation and inspection process, and it is difficult to set a light source under the cell to penetrate, making it difficult to conduct inspection. That is, there is a problem that the inside of the cell cannot be inspected when the back of the cell cannot be illuminated.

[0037] In view of this, the utility model provides a battery cell detection device, including a shielding component 100, a camera component 200 and a light source component 300; the shielding component 100, the camera component 200 and the light source component 300 are all arranged above the battery cell 10; the shielding component 100 includes a baffle 110, the baffle 110 includes a shading plate 111, and the shading plate 111 can move along the conveying direction of the battery cell 10 and in a direction perpendicular to the battery cell 10; the light source component 300 emits light to illuminate the battery cell 10, and the camera component 200 receives light on the side of the shading plate 111 away from the light source component 300 to obtain an image.

[0038] The cell detection device provided by the utility model emits infrared light at a set angle through the light source component 300. After the light irradiates the cell 10, part of the light is refracted by adjusting the light shielding plate 111 and enters the cell 10 and is totally reflected inside the cell 10. Part of the light is reflected on the upper surface of the cell 10 and blocked by the baffle 110 to prevent this part of the light from reaching the camera component 200 and affecting the imaging effect. When the light entering the cell 10 encounters defects such as hidden cracks, irregular refraction occurs, so that part of the light reaches the camera component 200 and the camera component 200 obtains an image of the defect, thereby achieving the purpose of detection. For the cell 10 that has special requirements for the transport runway after cleaning and texturing, which makes it impossible to illuminate the back of the cell 10, and the situation that the back of the cell 10 cannot be illuminated due to the limitation of existing equipment, the utility model obtains the image by illuminating from above the cell 10, and blocks the interfering light through the light shielding plate 111 with adjustable position, so as to ensure the imaging effect, improve the detection quality and reduce the detection difficulty.

[0039] The following combination Figure 1-Figure 12 The structure and shape of the battery cell detection device provided in this embodiment are described in detail.

[0040] In an optional solution of this embodiment, the battery cell detection device includes a shielding component 100, a camera component 200, a light source component 300 and a base component 400, and the shielding component 100, the camera component 200 and the light source component 300 are all installed on the base component 400. Figure 1 shown.

[0041] In this embodiment, the basic assembly 400 includes a first frame 410, a guide rail unit 420 and a second frame 430. Figure 6 As shown. The first frame 410 includes a first top plate, a first column and a first bottom plate. The four first columns are arranged in a rectangular shape, with the upper ends connected to the first top plate and the lower ends connected to the first bottom plate. The two first bottom plates are arranged in parallel and are respectively connected to the two first columns, and their lengths extend along the conveying direction of the battery cell 10. Specifically, the shielding assembly 100 is installed on the first bottom plate, and the camera assembly 200 and the light source assembly 300 are installed on the first top plate.

[0042] In this embodiment, two guide rail units 420 are respectively installed on the first base plate, and the guide rail unit 420 includes a first linear guide rail 421, a positioning module 422 and a limit connection plate 423. Figure 7 The shielding assembly 100 is connected to the slider of the first linear guide 421, the positioning module 422 is slidably mounted on the guide rail of the first linear guide 421, and the limit connecting plate 423 is connected to the positioning module 422 and the slider of the first linear guide 421. The positioning module 422 includes a positioning block 401, a clamping block 402 and a bidirectional screw 403, as shown in FIG. Figure 8 As shown, two clamping blocks 402 are slidably mounted on the positioning block 401, and the bidirectional screw 403 is inserted into the clamping block 402 and is threadedly connected with the clamping block 402. Specifically, the bidirectional screw 403 is provided with a left-handed thread and a right-handed thread, and the two clamping blocks 402 are respectively provided with corresponding left-handed threads and right-handed threads. Rotating the bidirectional screw 403 can drive the two clamping blocks 402 to move toward each other or away from each other. Among them, the positioning block 401 is connected to the limiting connecting plate 423. When the two clamping blocks 402 move toward each other, the guide rail of the first linear guide rail 421 can be clamped, so that the position of the slider is fixed, and then the position of the baffle 110 is fixed. Furthermore, in order to keep the bidirectional screw 403 locked and to facilitate the rotation, the positioning module 422 also includes a tightening handle, which is connected to the bidirectional screw 403.

[0043] In this embodiment, the second frame 430 includes a second top plate, a second column and a second bottom plate. Figure 6As shown, two second uprights are vertically arranged, one end of which is connected to the second top plate, and the other end of which is connected to the second bottom plate. The two second frames 430 are respectively connected to the two first bottom plates of the first frame 410 through second linear guide rails, that is, the slider of the second linear guide rail is connected to the first bottom plate, and the guide rail of the second linear guide rail is connected to the second top plate of the second frame 430. At the same time, a positioning module 422 is also provided, and the positioning module 422 is used to connect the second linear guide rail and the first bottom plate to lock the relative position of the first frame 410 and the second frame 430.

[0044] In this embodiment, the shielding assembly 100 includes a baffle 110, a screw rod 120 and a knob 130. Figure 2 , Figure 3 As shown, the screw rod 120 is rotatably mounted on the first frame 410, and the screw rod 120 is inserted into the baffle 110 and screwed with the baffle 110; the knob 130 is connected to the screw rod 120 to facilitate the rotation of the screw rod 120. The baffle 110 includes a shading plate 111, a connecting rod 112, a first connecting plate 113 and a second connecting plate 114, as shown in FIG. Figure 3 As shown, the shading plate 111 is kept in a vertical state, that is, the lower edge of the shading plate 111 is parallel to the surface of the silicon wafer, ensuring a consistent light shielding effect. Specifically, the connecting rod 112 is connected to the slider of the first linear guide 421, thereby realizing a sliding connection with the first frame 410, the first connecting plate 113 is connected to the connecting rod 112, the shading plate 111 is connected to the first connecting plate 113 and is vertically arranged, the second connecting plate 114 is connected to the connecting rod 112 and is screwed with the screw 120, and the shading plate 111 can be driven to move along the conveying direction of the battery cell 10 by rotating the screw 120 to rotate it around its own axis.

[0045] In this embodiment, in order to improve the shielding effect of the baffle plate 110 and facilitate adjustment, a first long hole 101 extending in the vertical direction is provided on the first connecting plate 113, and the baffle plate 111 is bolted to the first connecting plate 113 through the first long hole 101, so that the baffle plate 111 can move in the vertical direction to adjust the distance between the baffle plate 111 and the upper surface of the battery cell 10.

[0046] In this embodiment, the camera assembly 200 includes a camera 210, a connecting block 220 and a support plate 230. Figure 4 As shown, the camera 210 is connected to the connecting block 220, and the connecting block 220 is mounted on the supporting plate 230, and the supporting plate 230 is set as an L-shaped plate and connected to the first top plate of the first frame 410. Specifically, the supporting plate 230 is provided with a second long hole 201 extending in the vertical direction, and a plurality of second long holes 201 are arranged in the vertical direction. The connecting block 220 is bolted to the supporting plate 230 through the second long holes 201, so that the height of the camera 210 can be adjusted by adjusting the position of the connecting block 220 to adjust the imaging effect.

[0047] In this embodiment, the light source assembly 300 includes a light source 310, a swing plate 320, a connecting frame 330 and an adapter plate 340. Figure 5 As shown. The light source 310 is connected to the swing plate 320. The swing plate 320 is provided with a center hole 301 and an arc groove 302. The arc groove 302 is coaxial with the center hole 301. The swing plate 320 is hinged to the connection frame 330 through the center hole 301 and can swing along the arc groove 302 to adjust the irradiation angle of the light source 310. The connection frame 330 is slidably connected to the adapter plate 340 and can move in the vertical direction. The adapter plate 340 can move along the conveying direction of the battery cell 10. Specifically, the connection frame 330 and the adapter plate 340 are connected by a linear guide rail, and a positioning unit is provided to lock the position of the connection frame 330 in the height direction. The adapter plate 340 is L-shaped. One side of the L-shape is connected to the lower surface of the first top plate of the first frame 410 through a linear guide rail. At the same time, a positioning unit is provided so that the adapter plate 340 can move along the conveying direction of the battery cell and lock the position. The other side of the L-shape is connected to the connection frame 330 through a linear guide rail. In this embodiment, the light source 310 uses an LED light source with a wavelength range of 1200nm-1500nm to ensure penetration of the silicon wafer, preferably 1300nm. Through the setting of multiple degrees of freedom, the camera 210 and the light source 310 are easy to adjust, so as to quickly adjust to the appropriate position for corresponding detection.

[0048] In an optional solution of this embodiment, in order to facilitate installation and avoid insufficient ground space, the second frame 430 can be arranged above the first frame 410, and the ground installation is changed to a hanging installation. Fig.11 As shown, the second frame 430 is flipped 180°, and the second bottom plate is located above the second top plate; the two second frames 430 are respectively connected to the first top plate of the first frame 410 through the second linear guide rail, and a positioning module 422 is provided to connect the second linear guide rail and the first top plate so that the relative positions of the first frame 410 and the second frame 430 are locked.

[0049] In this embodiment, in order to reduce the interference of ambient light on the detection, a box 500 is also provided. Fig.12 As shown, the box 500 surrounds the camera assembly 200 from all sides to block the interference of ambient light, thereby improving the accuracy of detection. At the same time, the top of the box 500 can also be closed to further reduce the entry of ambient light.

[0050] The working process of the battery cell detection device provided in this embodiment is as follows:

[0051] When in use, the position is first adjusted by placing the battery cell 10 directly under the camera 210 , and rotating the knob 130 to drive the screw 120 to rotate, thereby moving the baffle 110 to the side away from the light source 310 and between the camera 210 and the light source 310 .

[0052] Then adjust the angle and height of the light source 310, move the light source 310 along the conveying direction of the battery cell 10, and fix the light source 310 after finding the brightest position of the camera 210. If a relatively large area is always overexposed when the light source 310 moves, reduce the exposure time until the brightest time is found and fix the position of the light source 310.

[0053] Then, the baffle 110 is moved to keep the baffle 110 between the camera 210 and the light source 310. During the movement, the image of the camera 210 changes from bright to dark and then to bright again. The position of the camera chip image is controlled within 2 cm from the baffle 110. At this time, some hidden cracks can be made in the silicon wafer area where the camera 210 chip images. The light source 310 is moved back and forth so that the hidden cracks, i.e., light and dark vertical stripes, can be seen in the image. At the same time, the position of the shading plate 111 in the vertical direction can be adjusted to adjust the shading effect.

[0054] The battery cell detection device provided in this embodiment is simple and convenient to operate. Through the above process, the position of the baffle 110 can be quickly and accurately adjusted, which reduces the difficulty of detection. The battery cell 10 is detected when passing through the conveyor belt. After the light is irradiated to the battery cell 10 at a set angle, part of the light is refracted and enters the battery cell 10 and is totally reflected inside the battery cell 10. Part of the light is reflected on the upper surface of the battery cell 10 and is blocked by the baffle 110 to prevent this part of the light from reaching the camera assembly 200 and affecting the imaging effect. Fig. 9 , Fig.10 As shown. When the light entering the battery cell 10 encounters a defect such as a hidden crack, it will change from total reflection to irregular refraction and be captured by the camera 210, thereby discovering the defect and generating an image. The baffle 110 can block most of the reflected light from entering the camera 210, ensuring that more light enters the camera 210 after refraction, making the image clearer and being able to clearly display defects such as hidden cracks.

[0055] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the utility model, rather than to limit it. Although the utility model has been described in detail with reference to the aforementioned embodiments, ordinary technicians in this field should understand that they can still modify the technical solutions recorded in the aforementioned embodiments, or replace some or all of the technical features therein with equivalents. However, these modifications or replacements do not make the essence of the corresponding technical solution deviate from the scope of the technical solution of the embodiments of the utility model.

Claims

1. A battery cell detection device, characterized in that: It includes a shielding component, a camera component and a light source component; The shielding assembly, the camera assembly and the light source assembly are all arranged above the battery sheet; The shielding assembly includes a baffle, and the baffle includes a light shielding plate, and the light shielding plate can move along the conveying direction of the battery sheet and in a direction perpendicular to the battery sheet; The light source assembly emits light to illuminate the battery sheet, and the camera assembly receives the light on a side of the shading plate away from the light source assembly to acquire an image.

2. The battery cell detection device according to claim 1, characterized in that: Also included is a base assembly, the base assembly comprising a first frame; The baffle is slidably connected to the first frame.

3. The battery cell detection device according to claim 2, characterized in that: The shielding assembly further includes a screw rod, which is rotatably mounted on the first frame; The screw rod is inserted into the baffle plate and screwed with the baffle plate; The screw rod rotates around its own axis to drive the baffle to move along the conveying direction of the battery sheet.

4. The battery cell detection device according to claim 3, characterized in that: The baffle further comprises a connecting rod, a first connecting plate and a second connecting plate; The connecting rod is slidably connected to the first frame, the first connecting plate is connected to the connecting rod, the shading plate is connected to the first connecting plate, and the second connecting plate is connected to the connecting rod and screwed to the screw rod; The first connecting plate is provided with a first long hole extending in a vertical direction, and the shading plate is bolted to the first connecting plate through the first long hole.

5. The battery cell detection device according to claim 4, characterized in that: The baffle assembly also includes a knob, and the knob is connected to the screw rod.

6. The battery cell detection device according to claim 5, characterized in that: The basic assembly further includes a guide rail unit, which includes a first linear guide rail, a positioning module and a limit connecting plate; The connecting rod is connected to the slider of the first linear guide, the positioning module is slidably installed on the guide rail of the first linear guide and clamps the guide rail of the first linear guide, and the limiting connecting plate is connected to the positioning module and the slider of the first linear guide.

7. The battery cell detection device according to claim 6, characterized in that: The positioning module comprises a positioning block and a clamping block, and the two clamping blocks are slidably mounted on the positioning block; The positioning block is connected to the limiting connecting plate, and the two clamping blocks move toward each other to clamp the guide rail of the first linear guide rail.

8. The battery cell detection device according to claim 1, characterized in that: The camera assembly includes a camera, a connecting block and a support plate; The camera is connected to the connecting block, the support plate is provided with a plurality of second long holes extending in the vertical direction, the plurality of second long holes are arranged in the vertical direction, and the connecting block is bolted to the support plate through the second long holes.

9. The battery cell detection device according to claim 1, characterized in that: The light source assembly comprises a light source, a swing plate and a connecting frame; The light source is connected to the swing plate, and the swing plate is provided with a central hole and an arc-shaped groove, wherein the arc-shaped groove is coaxial with the central hole; The swing plate is hinged to the connection frame through the central hole and can swing along the arc groove.

10. The battery cell detection device according to claim 9, characterized in that: The light source assembly further comprises an adapter plate, the connection frame is slidably connected to the adapter plate and can move in a vertical direction, and the adapter plate can move in a conveying direction of the battery sheet.

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