Solar cell and manufacturing method thereof

Abstract

The invention relates to the field of solar cell manufacturing, in particular to a solar cell and a manufacturing method thereof. Comprising the following steps: installing a rectangular positioning plate at the lower end of a solar cell; placing the solar cells with the rectangular positioning plates in a manufacturing device, and transporting the solar cells through the manufacturing device; the positioning plate at the lower end of the solar cell is used for clamping the solar cell into the manufacturing device, so that the purposes of positioning and deviation prevention are achieved; scanning the state of the transported solar cell through a scanning camera; when an unpositioned solar cell is found, the scanning camera transmits a signal to the main control computer, and the main control computer sends an instruction to the manufacturing device; the manufacturing device is used for correcting the solar cell when the solar cell is in the air, and the purposes of friction prevention and abrasion prevention are achieved. Taking out the solar cell from the manufacturing device, and entering a packaging process; the solar cell can be corrected in the air, and frictional wear between the push plate and the conveyor belt is avoided.

Description

Technical Field

[0001] This invention relates to the field of solar cell manufacturing, and in particular to a solar cell and its manufacturing method. Background Technology

[0002] A solar cell is a thin photovoltaic semiconductor wafer that generates electricity directly from sunlight. When exposed to light under certain illumination conditions, it can instantly output voltage and generate current in the presence of a circuit. During the manufacturing process, solar cells need to be transported by conveyor belt to the next stage for packaging. Because the solar cells may deflect during transport, they need to be corrected to prevent them from falling and getting damaged. Conventional push-plate correction methods cause friction between the solar cells and the conveyor belt, resulting in wear and tear. Furthermore, since solar cells are generally thin, using conventional push-plate correction requires the push plate to be very close to the conveyor belt, which can easily lead to friction and wear, affecting the operation of the conveyor belt. Summary of the Invention

[0003] The purpose of this invention is to provide a solar cell and its manufacturing method, which can perform air-mounting correction of the solar cell to avoid friction and wear between the push plate and the conveyor belt.

[0004] The objective of this invention is achieved through the following technical solution:

[0005] A method for manufacturing a solar cell includes the following steps:

[0006] S1. Install a rectangular positioning plate at the lower end of the solar cell;

[0007] S2. Place the solar cell with the rectangular positioning plate in the manufacturing device and transport the solar cell through the manufacturing device;

[0008] S3. Use the positioning plate at the lower end of the solar cell to lock it into the manufacturing device to achieve the purpose of positioning and preventing displacement;

[0009] S4. Scan the condition of the transported solar cells using a scanning camera;

[0010] S5. When an unlocated solar cell is detected, the scanning camera transmits a signal to the main controller, which then sends instructions to the manufacturing unit.

[0011] S6. The solar cells are straightened while in the air using a manufacturing device to achieve the purpose of preventing friction and wear.

[0012] S7. Remove the solar cells from the manufacturing equipment and proceed to the packaging process.

[0013] The main control unit is a PLC control cabinet.

[0014] The scanning camera used is a line scanning camera with a speed of 150-200 m / min.

[0015] The positioning plate is made of plastic or hard rubber.

[0016] The solar cells are fixed to the positioning plate by adhesive or bolts.

[0017] In step S7, a robotic arm equipped with a suction cup is used to remove the solar cell.

[0018] The manufacturing apparatus includes a base, on which two rollers are rotatably connected, and between the two rollers are two conveyor belts. The two conveyor belts have symmetrically arranged positioning grooves. An air cylinder is fixedly connected to the base and is located in the gap between the two conveyor belts. A drive motor is fixedly connected to the base, and a crankshaft is fixedly connected to the output shaft of the drive motor. A swing frame is rotatably connected to the crankshaft, and a sliding rod is slidably connected to the swing frame. A straightening plate is fixedly connected to the base, and a fixing rod is fixedly connected to the base. The swing frame has a sliding groove, and the swing frame is slidably connected to the fixing rod through the sliding groove. Attached Figure Description

[0019] Figure 1-3 This is a flowchart illustrating a method for manufacturing solar cells.

[0020] Figure 4-5 This is a schematic diagram of the overall structure of the manufacturing equipment;

[0021] Figure 6 This is a structural diagram of the display stand;

[0022] Figure 7 This is a schematic diagram of the corrective plate.

[0023] Figure 8 This is a schematic diagram of the air cylinder structure;

[0024] Figure 9 This is a schematic diagram of the slide plug structure;

[0025] Figure 10 This is a schematic diagram of the conveyor belt structure. Detailed Implementation

[0026] A method for manufacturing a solar cell includes the following steps:

[0027] S1. Install a rectangular positioning plate at the lower end of the solar cell;

[0028] S2. Place the solar cell with the rectangular positioning plate in the manufacturing device and transport the solar cell through the manufacturing device;

[0029] S3. Use the positioning plate at the lower end of the solar cell to lock it into the manufacturing device to achieve the purpose of positioning and preventing displacement;

[0030] S4. Scan the condition of the transported solar cells using a scanning camera;

[0031] S5. When an unlocated solar cell is detected, the scanning camera transmits a signal to the main controller, which then sends instructions to the manufacturing unit.

[0032] S6. The solar cells are straightened while in the air using a manufacturing device to achieve the purpose of preventing friction and wear.

[0033] S7. Remove the solar cells from the manufacturing equipment and proceed to the packaging process.

[0034] The main control unit is a PLC control cabinet.

[0035] The scanning camera used is a 200m / min line scan camera.

[0036] The positioning plate is made of hard rubber.

[0037] The solar cells are fixed to the positioning plate by adhesive.

[0038] In step S7, a robotic arm equipped with a suction cup is used to remove the solar cell.

[0039] like Figure 4 , Figure 5 , Figure 6 , Figure 7 As shown:

[0040] The manufacturing apparatus includes a base 103, on which two rollers are rotatably connected via bearings. Two conveyor belts 101 are fitted between the two rollers. Positioning grooves 102 are symmetrically provided on the two conveyor belts 101. An air cylinder 203 is fixedly connected to the base 103 via bolts and is located in the gap between the two conveyor belts 101. A drive motor 202 is fixedly connected to the base 103 via bolts. A crankshaft 201 is fixedly connected to the output shaft of the drive motor 202 via a coupling. A swing frame 301 is rotatably connected to the crankshaft 201 via bearings. A sliding rod 303 is slidably connected to the swing frame 301. A straightening plate 304 is fixedly connected to the base 103 via bolts. A fixing rod 402 is fixedly connected to the base 103 via bolts. A sliding groove 302 is provided on the swing frame 301 and is slidably connected to the fixing rod 402 via the sliding groove 302.

[0041] When using the manufacturing device, the solar cell is placed between two conveyor belts 101, so that the two ends of the positioning plate at the bottom of the solar cell are respectively engaged in the positioning grooves 102 on the two conveyor belts 101. Then, the two conveyor belts 101 are controlled to rotate synchronously to the right, conveying the solar cell to the right. When the solar cell moves to the rightmost end, the robotic arm removes the solar cell from the positioning groove 102, and then it can be transferred to the next process. The positioning grooves 102 on the two conveyor belts 101 cooperate with the solar cell to position the solar cell and prevent the solar cell from shifting on the two conveyor belts 101, which would cause it to fall and be damaged.

[0042] Workers install scanning cameras above the two conveyor belts 101, connecting the cameras to a main control unit, which in turn connects to a drive motor 202. When the scanning camera detects a solar cell not properly inserted into the positioning slot 102, it transmits a signal to the main control unit. The main control unit then issues a command to control the drive motor 202 to rotate the crankshaft 201. As the crankshaft 201 rotates, it causes the swing frame 301 to slide on the fixed rod 402, simultaneously oscillating left and right. When the swing frame 301 oscillates to the right, it causes the straightening plate 304 to oscillate upwards and to the right, while simultaneously controlling... The slide bar 303 slides towards the conveyor belt 101, causing the two straightening plates 304 to move closer together. At this time, the air pump 203 sprays air, which blows the solar cell into the air. Simultaneously, the two straightening plates 304 move closer together and clamp the positioning plate at the lower end of the solar cell, thereby clamping and straightening the solar cell. Finally, the solar cell falls into the positioning groove 102, thus achieving the function of straightening the solar cell. The positioning plate also protects the solar cell and prevents the two straightening plates 304 from directly clamping and damaging it.

[0043] During the rightward swing of the two correction plates 304, the lateral movement speed is equal to the movement speed of the solar cell, thus ensuring that the solar cell can be accurately placed in the positioning groove 102 after correction. When the two correction plates 304 swing to the left, the two correction plates 304 gradually separate, preparing for the next correction.

[0044] By using two straightening plates 304 to straighten the solar cells in the air, the friction between the solar cells and the conveyor belt 101 can be reduced, thus reducing wear. Furthermore, since solar cells are generally thin, when using conventional push plates to straighten solar cells, they need to be very close to the conveyor belt 101, which can easily lead to friction between the push plates and the conveyor belt 101, affecting the operation of the conveyor belt 101. The two straightening plates 304 can avoid contact with the conveyor belt 101.

[0045] like Figure 5 , Figure 6 , Figure 7 As shown:

[0046] Two slide bars 303 are each fixedly connected to a wedge block 306 by bolts. A spring 305 is fitted on the slide bar 303. The spring 305 is located between the wedge block 306 and the swing frame 301. A guide plate 401 is fixedly connected to the base 103 by bolts.

[0047] When the swing frame 301 swings to the right, it drives the wedge block 306 to move to the right. After the wedge block 306 contacts the inclined surface on the guide plate 401, it drives the slide rod 303 to slide towards the conveyor belt 101, thereby bringing the two straightening plates 304 closer together. At the same time, the spring 305 is compressed. When the wedge block 306 detaches from the guide plate 401 and swings to the left, it will automatically reset under the elastic action of the spring 305, causing the two straightening plates 304 to separate.

[0048] like Figure 6 , Figure 7 , Figure 8 , Figure 9 As shown:

[0049] A push-pull rod 205 is rotatably connected to the crankshaft 201 via a bearing, and a slide plug 204 is rotatably connected to the upper end of the push-pull rod 205 via a bearing.

[0050] When the crankshaft 201 rotates, it drives the push-pull rod 205 to push and pull the slide plug 204. When the slide plug 204 slides downward, a negative pressure is generated in the air cylinder 203, and air is drawn in through the upper port of the air cylinder 203. At this time, the swing frame 301 swings to the left. When the slide plug 204 slides upward, the air in the air cylinder 203 is discharged, which can blow up the solar cell. At this time, the swing frame 301 swings to the right to correct the solar cell.

[0051] By controlling the rotation of the crankshaft 201, the slider 204 and the swing frame 301 can cooperate with each other, thus achieving both correction and blowing functions simultaneously, making the overall structure more compact.

[0052] A solar cell manufactured using a solar cell manufacturing method, wherein a rectangular positioning plate is mounted on the lower end of the solar cell.

Claims

1. A method for manufacturing a solar cell, characterized in that: Includes the following steps: S1. Install a rectangular positioning plate at the lower end of the solar cell; S2. Place the solar cell with the rectangular positioning plate in the manufacturing device and transport the solar cell through the manufacturing device; S3. Use the positioning plate at the lower end of the solar cell to lock it into the manufacturing device to achieve the purpose of positioning and preventing displacement; S4. Scan the condition of the transported solar cells using a scanning camera; S5. When an unlocated solar cell is detected, the scanning camera transmits a signal to the main controller, which then sends instructions to the manufacturing unit. S6. The solar cells are straightened while in the air using a manufacturing device to achieve the purpose of preventing friction and wear. S7. Remove the solar cells from the manufacturing equipment and proceed to the packaging process.

2. The method for manufacturing a solar cell according to claim 1, characterized in that: The main control unit is a PLC control cabinet.

3. The method for manufacturing a solar cell according to claim 1, characterized in that: The scanning camera used is a line scanning camera with a speed of 150-200 m / min.

4. The method for manufacturing a solar cell according to claim 1, characterized in that: The positioning plate is made of plastic or hard rubber.

5. A method for manufacturing a solar cell according to claim 1, characterized in that: The solar cells are fixed to the positioning plate by adhesive or bolts.

6. A method for manufacturing a solar cell according to claim 1, characterized in that: In step S7, a robotic arm equipped with a suction cup is used to remove the solar cell.

7. A method for manufacturing a solar cell according to claim 1, characterized in that: The manufacturing apparatus includes a base (103), on which two rollers are rotatably connected. Two conveyor belts (101) are fitted between the two rollers. Positioning grooves (102) are symmetrically provided on the two conveyor belts (101). An air cylinder (203) is fixedly connected to the base (103), located in the gap between the two conveyor belts (101). A drive motor (202) is fixedly connected to the base (103). 2) A crankshaft (201) is fixedly connected to the output shaft. A swing frame (301) is rotatably connected to the crankshaft (201). A slide rod (303) is slidably connected to the swing frame (301). A straightening plate (304) is fixedly connected to the base (103). A fixing rod (402) is fixedly connected to the base (103). A slide groove (302) is provided on the swing frame (301). The swing frame (301) is slidably connected to the fixing rod (402) through the slide groove (302).

8. A method for manufacturing a solar cell according to claim 7, characterized in that: Both slide bars (303) are fixedly connected to wedge blocks (306), and springs (305) are sleeved on the slide bars (303). The springs (305) are located between the wedge blocks (306) and the swing frame (301). A guide plate (401) is fixedly connected to the base (103).

9. A method for manufacturing a solar cell according to claim 7, characterized in that: A push-pull rod (205) is rotatably connected to the crankshaft (201), and a slide plug (204) is rotatably connected to the upper end of the push-pull rod (205). The slide plug (204) is slidably connected inside the air cylinder (203).

10. A solar cell manufactured using the method for manufacturing a solar cell according to claim 9, characterized in that: A rectangular positioning plate is installed at the lower end of the solar cell.

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