Hot spot EL probe row for BC battery production

Abstract

The utility model discloses a hot spot EL probe row used for BC battery production, comprising a mounting frame and a plurality of glass fiber plates, the glass fiber plates are distributed at equal intervals and are parallel to each other, both sides of the mounting frame are provided with slots, both sides of the glass fiber plates are inserted into the slots, the middle parts of the glass fiber plates are provided with a plurality of probe grooves along the vertical direction, and the probe grooves are arranged in the mounting frame. The probe grooves are distributed at equal intervals and are parallel to each other, elastic probes penetrate through the probe grooves, bus bars are arranged on the side face of the glass fiber plate, the bus bars and the elastic probes are welded together, and a probe flat cable connector is arranged at one end of each bus bar. According to the hot spot EL probe row for BC battery production, hot spot and EL detection is carried out on a silicon wafer of a BC battery in the production process, the whole plate drives all the elastic probes to make contact with the silicon wafer, the silicon wafer is elastically contacted and protected, EL detects the defects such as black spots, scratches, blackening, belt marks, smudginess, black edges, suction cup marks, scratches and flower basket marks on the silicon wafer, grading is carried out after detection, and the detection efficiency is improved. And grading information is transmitted to the high-speed sorting machine.

Description

Technical Field

[0001] This utility model relates to the technical field of silicon wafer production, and in particular to a hot spot EL probe array for BC battery production. Background Technology

[0002] Photovoltaic silicon wafers (hereinafter referred to as silicon wafers) are the core component of solar power generation systems and also the most valuable part. The function of silicon wafers is to convert solar energy into electrical energy, which is then stored in batteries or used directly as a power source. BC cells, short for Back Contact Batteries, are an advanced solar cell technology. Their key feature is that the emitter, surface field, and metal electrodes are all located on the back of the cell and arranged in an interdigitated pattern. During the production of silicon wafers for these modules, EL (Electronic Photon) testing is required, which involves emitting photons and then performing image imaging. This testing requires corresponding EL probe arrays. Utility Model Content

[0003] One objective of this invention is to provide a hot spot EL probe array for BC battery production, which has stable performance, reasonable structure, and is suitable for use in BC battery production testing equipment.

[0004] To achieve this objective, the present invention adopts the following technical solution:

[0005] A hot spot EL probe array for BC battery production includes a mounting frame and several fiberglass plates. The mounting frame has a mounting position in its center, and the fiberglass plates are located inside the mounting position. The fiberglass plates are evenly spaced and parallel to each other. Slots are provided on both sides of the mounting frame, and the fiberglass plates are inserted into these slots. Several probe slots are vertically arranged in the center of each fiberglass plate, and these probe slots are evenly spaced and parallel to each other. Elastic probes pass through the probe slots. Busbars are provided on the sides of the fiberglass plates, and these busbars are welded together with the elastic probes. A probe cable connector is provided at one end of each busbar.

[0006] As a preferred technical solution, side guards are provided on both sides of the mounting frame. The side guards press against the outside of the fiberglass board. The side guards are provided with side through holes. Side screws are installed in the side through holes. The side screws thread-lock the side guards onto the mounting frame.

[0007] As a preferred technical solution, upper pressure strips are provided on both sides of the mounting frame. The upper pressure strips press against the upper ends of both sides of the fiberglass board. The upper pressure strips are provided with upper through holes, and upper screws are installed in the upper through holes. The upper screws thread and lock the upper pressure strips onto the mounting frame.

[0008] As a preferred technical solution, the elastic probe includes a needle sleeve and a needle head. The lower end of the needle sleeve is provided with a mounting position, and the upper end of the needle head is inserted into the mounting position. The needle head moves elastically back and forth.

[0009] As a preferred technical solution, the lower periphery of the needle sleeve is provided with a circular protrusion, which is engaged with the upper end of the fiberglass board.

[0010] As a preferred technical solution, the busbar is provided with a number of spot welding holes, which are connected to and welded to the elastic probe.

[0011] As a preferred technical solution, the height of the weld point within the spot welding hole is lower than the side surface of the fiberglass board.

[0012] As a preferred technical solution, mounting holes are provided at both ends of the mounting frame.

[0013] The beneficial effects of this utility model are as follows: It provides a hot spot EL probe array for BC battery production. This hot spot EL probe array for BC battery production performs hot spot and EL detection on the silicon wafer of BC battery in the production process. The whole board drives all elastic probes to contact the silicon wafer. The elastic contact protects the silicon wafer and is used to detect defects on the silicon wafer. It reduces the number of defective silicon wafers that need to be processed and produced, which is conducive to improving production quality and increasing production capacity. Attached Figure Description

[0014] The present invention will now be described in further detail with reference to the accompanying drawings and embodiments.

[0015] Figure 1 This is a schematic diagram of the overall structure of a hot spot EL probe array for BC battery production as described in the embodiment.

[0016] Figure 2 This is a top view of a hot spot EL probe array for BC battery production as described in the embodiment;

[0017] Figure 3 This is a first cross-sectional view of a hot spot EL probe array for BC battery production as described in the embodiment.

[0018] Figure 4 This is a second cross-sectional view of a hot spot EL probe array for BC battery production as described in the embodiment;

[0019] Figure 5 This is a perspective view of the fiberglass board described in the embodiment;

[0020] Figure 6 This is an exploded view of the elastic probe described in the embodiment.

[0021] Figures 1 to 6 middle:

[0022] 1. Mounting frame; 2. Fiberglass board; 3. Mounting position; 4. Elastic probe; 5. Busbar; 6. Probe cable connector; 7. Side baffle; 8. Side through hole; 9. Upper pressure strip; 10. Upper through hole; 11. Needle sleeve; 12. Needle tip; 13. Circular protrusion; 14. Spot welding hole; 15. Mounting hole. Detailed Implementation

[0023] The technical solution of this utility model will be further described below with reference to the accompanying drawings and specific embodiments.

[0024] like Figures 1 to 6 As shown in this embodiment, a hot spot EL probe array for BC battery production includes a mounting frame 1 and several fiberglass plates 2. The mounting frame 1 has a mounting position 3 in the middle, and the fiberglass plates 2 are located inside the mounting position 3. The fiberglass plates 2 are evenly spaced and parallel to each other. Slots are provided on both sides of the mounting frame 1, and the fiberglass plates 2 are inserted into the slots on both sides. Several probe slots are provided in the middle of the fiberglass plates 2 along the vertical direction. The probe slots are evenly spaced and parallel to each other. Elastic probes 4 pass through the probe slots. Busbars 5 are provided on the side of the fiberglass plates 2. The busbars 5 are welded together with the elastic probes 4. A probe cable connector 6 is provided at one end of the busbars 5.

[0025] The mounting frame 1 is a single unit with a mounting position 3 in the middle. Fiberglass boards 2 are arranged in parallel in the mounting position 3 and assembled by inserting into slots on both sides of the mounting frame 1. Each fiberglass board 2 has an elastic probe 4 inserted into it and is fixed by welding through the busbar 5 on the outside of the fiberglass board 2. The fiberglass board 2 and the mounting frame 1 move up and down as a whole. The elastic probe 4 makes elastic contact with the silicon wafer of the BC battery, thereby realizing hot spot and EL detection.

[0026] Side baffles 7 are provided on both sides of the mounting frame 1. The side baffles 7 press against the outer side of the fiberglass board 2. Side baffles 7 are provided with side through holes 8. Side screws are installed in the side through holes 8. The side screws thread-lock the side baffles 7 onto the mounting frame 1. In addition, upper pressure strips 9 are provided on both sides of the mounting frame 1. The upper pressure strips 9 press against the upper ends of both sides of the fiberglass board 2. Upper pressure strips 9 are provided with upper through holes 10. Upper screws are installed in the upper through holes 10. The upper screws thread-lock the upper pressure strips 9 onto the mounting frame 1.

[0027] After inserting the mounting frame 1 into both sides of the fiberglass board 2, use the upper pressure strip 9 to press the side of the fiberglass board 2 down from above, use the side baffle 7 to make the side of the fiberglass board 2 flush with the outside, and then lock it with screws.

[0028] The elastic probe 4 includes a needle sleeve 11 and a needle 12. The lower end of the needle sleeve 11 is provided with a mounting position 3. The upper end of the needle 12 is inserted into the mounting position 3. The needle 12 moves elastically back and forth, and the needle 12 is inserted from the lower end of the needle sleeve 11 to form an elastic structure.

[0029] The lower periphery of the needle sleeve 11 is provided with a circular protrusion 13, which is engaged with the upper end of the fiberglass plate 2, effectively preventing the elastic probe 4 from retracting too far upward and thus limiting its position.

[0030] The busbar 5 is provided with several spot welding holes 14. The spot welding holes 14 are connected to the elastic probe 4 and welded. The height of the weld points in the spot welding holes 14 is lower than the side of the fiberglass board 2. After the spot welding is fixed, the spot welding position must not protrude from the plane of the fiberglass board 2.

[0031] Mounting holes 15 are provided at both ends of the mounting frame 1. The entire hot spot EL probe array is installed into the corresponding mechanism or equipment according to the mounting holes 15.

[0032] It should be stated that the above-described specific embodiments are merely preferred embodiments of this utility model and the technical principles applied thereto. Within the scope of the technology disclosed in this utility model, any variations or substitutions that are easily conceived by those skilled in the art should be covered within the protection scope of this utility model.

Claims

1. A hot spot EL probe array for BC battery production, characterized by, The utility model provides a kind of glass fiber plate installation frame, including installation frame and several glass fiber plates, the middle part of the installation frame is provided with installation site, the glass fiber plate is inside the installation site, the glass fiber plate is distributed between equidistant and parallel with each other, the both sides of the installation frame are provided with slot, the both sides of the glass fiber plate are inserted into the slot, the middle part of the glass fiber plate is provided with several probe grooves along vertical direction, the probe groove is distributed between equidistant and parallel with each other, the probe groove is passed through with elastic probe, the side of the glass fiber plate is provided with busbar, the busbar is welded together between the elastic probe, one end of the busbar is provided with probe flat cable connector.

2. A hot spot EL probe array for BC battery production according to claim 1, characterized in that, The both sides of the installation frame are provided with side baffle, the side baffle is pressed on the outside of the glass fiber plate, the side baffle is provided with side through hole, the side screw is installed in the side through hole, and the side screw is screwed and locked on the installation frame.

3. A hot spot EL probe array for BC battery production according to claim 1, characterized in that, The both sides of the installation frame are provided with upper pressing strip, the upper pressing strip is pressed on the both sides of the upper end of the glass fiber plate, the upper pressing strip is provided with upper through hole, the upper screw is installed in the upper through hole, and the upper screw is screwed and locked on the installation frame.

4. A hot spot EL probe array for BC battery production according to claim 1, characterized in that, The elastic probe includes needle sleeve and needle head, the lower end of the needle sleeve is provided with installation site, the upper end of the needle head is inserted into the installation site, and the needle head is elastically reciprocating.

5. A hot spot EL probe array for BC battery production according to claim 4, characterized in that, The lower end of the needle sleeve is provided with annular protrusion periphery, and the annular protrusion is clamped on the upper end of the glass fiber plate.

6. A hot spot EL probe array for BC battery production according to claim 1, characterized in that, The busbar is provided with several spot welding hole positions, the spot welding hole position is communicated with the elastic probe and is welded.

7. A hot spot EL probe array for BC battery production according to claim 6, characterized in that, The height of the welding spot in the spot welding hole position is lower than the side of the glass fiber plate.

8. A hot spot EL probe array for BC battery production according to claim 1, characterized in that, The both ends of the installation frame are provided with mounting hole.

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