A measuring device for a solar IBC cell

Abstract

The utility model relates to a kind of measuring device of solar cell, especially a kind of measuring device of solar IBC cell piece, comprising: light source unit, for simulating sunlight illumination;Detection plate, with several detection contacts and adsorption hole, detection contact and electrode on the back of cell piece one-to-one correspondence, adsorption hole array setting, for adsorbing cell piece;Pneumatic equalization unit: be located in the lower of detection plate, with adsorption hole, for through adsorption hole cell piece is adsorbed on detection plate, to make detection contact and electrode conduction;And suction unit, with pneumatic equalization unit connection, for generating negative pressure;Wherein, light source unit is located in the upper of detection plate.This solar IBC cell piece measuring device makes solar cell piece front surface no obstruction, electrode on the back of solar cell piece can directly contact with detection contact, and fixed on detection plate by adsorption hole, negative pressure adsorption makes detection contact and motor keep good contact.

Description

Technical Field

[0001] This utility model relates to a measuring device for solar cells, and more particularly to a measuring device for solar IBC cells. Background Technology

[0002] There are currently two main methods for measuring solar IBC cells: 1. Front-facing transparent lamination / back-facing probe contact type: The front of the battery is laminated with a transparent acrylic sheet or ultra-clear glass sheet, while the back is contacted using a probe. After lamination, air blowing is required on the front to eliminate the adhesion effect between the battery cells and the glass.

[0003] 2. Front probe pressing / back probe contact type: The front of the battery is pressed with a probe, while the back is made into contact with the battery's contact points using a probe. This method is prone to causing damage to the front of the battery.

[0004] In addition, both of the above measurement methods suffer from the problem of the front of the battery being blocked, resulting in uneven distribution of incident light on the battery surface and affecting the measurement accuracy. Utility Model Content

[0005] To solve the above problems, this utility model provides a measuring device for solar IBC cells, the specific technical solution of which is as follows: A measuring device for solar IBC cells includes: a light source unit for simulating sunlight; a detection plate with a plurality of detection contacts and adsorption holes, wherein the detection contacts correspond one-to-one with electrodes on the back of the cell, and the adsorption holes are arranged in an array for adsorbing the cell; a pressure equalization unit located below the detection plate and communicating with the adsorption holes for adsorbing the cell onto the detection plate through the adsorption holes, thereby making the detection contacts conductive with the electrodes; and an air intake unit connected to the pressure equalization unit for generating negative pressure; wherein the light source unit is located above the detection plate.

[0006] Preferably, the air pressure equalization unit includes: an air intake base, having an air intake groove and an exhaust hole communicating with the air intake groove, the exhaust hole being connected to the air intake unit; an adsorption plate, disposed at the top of the air intake groove, and having a plurality of first through holes communicating with the air intake groove, the first through holes also communicating with the adsorption holes; and a sealing ring, disposed between the air intake base and the adsorption plate.

[0007] Furthermore, the air intake groove is provided with several support columns, which abut against the adsorption plate.

[0008] Furthermore, the exhaust holes are symmetrically arranged on both sides of the intake groove.

[0009] Furthermore, the suction base is provided with a sealing groove, and the sealing ring is disposed in the sealing groove.

[0010] Preferably, the detection contact is provided with a conductive layer.

[0011] Furthermore, the conductive layer includes a gold-plated layer.

[0012] Preferably, the detection board is a PCB board, and the detection board is provided with a circuit that communicates with the detection contact.

[0013] Preferably, it further includes: a sealing ring disposed on the detection plate for abutting against the back of the battery cell, wherein the detection contact and the adsorption hole are both located inside the sealing ring.

[0014] Preferably, the adsorption pores are evenly distributed around the detection contact.

[0015] Compared with the prior art, the present invention has the following advantages: The measuring device for solar IBC cells provided by the present invention allows the front of the solar cell to be unobstructed, and the electrodes on the back of the solar cell to directly contact the detection contacts and be fixed on the detection plate through the adsorption holes. The negative pressure adsorption ensures that the detection contacts maintain good contact with the motor. Attached Figure Description

[0016] Figure 1 This is a perspective view of this application; Figure 2 This is a diagram showing the hidden detection panel; Figure 3 This is a schematic diagram showing the hidden suction plate; Figure 4 This is a schematic diagram of the air intake base; Figure 5 It is a 3D view of the testing plate; Figure 6 This is a front view of the testing plate. Detailed Implementation

[0017] The present invention will now be further described with reference to the accompanying drawings.

[0018] like Figures 1 to 6As shown, a measuring device for solar IBC cells includes a light source unit, a detection plate 3, an air pressure equalization unit, and an air intake unit. The light source unit is located above the detection plate 3 and is used to simulate sunlight, with a stable irradiance of 1000 W / m². The detection plate 3 is provided with detection contacts 32 and adsorption holes 31, which are arranged in an array. The detection contacts 32 correspond one-to-one with the electrodes on the back of the cell, and the adsorption holes 31 are arranged between the detection contacts 32 to form a uniform adsorption force, pressing the cell onto the detection plate 3 under negative pressure, so that the detection contacts 32 maintain good contact with the electrodes. Since the cell is placed directly on the detection plate 3, there is no obstruction above the cell, and since the front of the cell is pressed onto the detection plate 3 by air pressure, the front of the cell will not be scratched. The detection plate 3 is mounted on top of the pressure equalization unit, which is connected to the adsorption hole 31. The adsorption hole 31 is used to adsorb the battery cell onto the detection plate 3, allowing the detection contact 32 to conduct to the electrode. The pressure equalization unit creates a uniformly distributed negative pressure, ensuring even stress on the battery cell and preventing damage caused by excessive localized stress. The suction unit is connected to the pressure equalization unit and is used to generate negative pressure.

[0019] The adsorption holes 31 arranged in the array can form a uniformly distributed adsorption force, so that the battery cell is subjected to uniform force, ensuring that each electrode can be pressed firmly on the detection contact 32.

[0020] Furthermore, the adsorption holes 31 are evenly distributed around the detection contact 32. Because the adsorption holes 31 are evenly distributed around the detection contact 32, the electrodes of the battery cell have a uniform pressing force around them, which enables the electrodes to be reliably pressed onto the detection contact 32, ensuring reliable conduction between the detection contact 32 and the electrodes during measurement.

[0021] The intake unit includes a vacuum generator and an air source. The vacuum generator is connected to both the pressure equalization device and the air source via piping. The vacuum generator produces negative pressure using high-pressure air from the air source. The air source can be provided by an air compressor.

[0022] The pressure equalization unit includes an intake base 2, an adsorption plate 1, and a sealing ring. The top of the intake base 2 has an intake groove 21, and both sides of the intake base 2 have exhaust holes 22 that communicate with the intake groove 21 and are also connected to the vacuum generator of the intake unit. The adsorption plate 1 is fixed to the intake base 2 with screws and is located at the top of the intake groove 21, sealing the intake groove 21. The adsorption plate 1 has several first through holes 11, which communicate with the intake groove 21 and the adsorption space, respectively, and correspond one-to-one with the adsorption holes 31. The sealing ring is located between the intake base 2 and the adsorption plate 1 to improve the sealing performance of the intake groove 21.

[0023] The exhaust ports 22 are symmetrically arranged on both sides of the intake groove 21, which can form a uniform airflow from both sides of the intake groove 21, thereby forming a uniform negative pressure inside the intake groove 21.

[0024] To prevent deformation of the adsorption plate 1, several support columns 25 are provided inside the air intake groove 21, and the support columns 25 abut against the adsorption plate 1. The support columns 25 are at the same height as the air intake groove 21, so that the adsorption plate 1 is supported when under pressure, preventing deformation at the center of the adsorption plate 1, protecting the battery cells and preventing damage to the battery cells due to deformation. The support columns 25 are symmetrically arranged on the center line of the air intake groove 21 and are opposite to the exhaust holes 22 on both sides to avoid the formation of turbulence.

[0025] To facilitate the installation of the sealing ring, the adsorption plate 1 is pressed flat against the suction base 2. The suction base 2 is provided with a sealing groove 23, and the sealing ring is placed in the sealing groove 23. The depth of the sealing groove 23 is less than the diameter of the sealing ring, so that the sealing ring deforms under pressure. At the same time, it ensures that the sealing ring is pressed tightly against the adsorption plate 1, and the deformation of the sealing ring does not reach the limit, so that the adsorption plate 1 can also be pressed tightly against the adsorption base, avoiding deformation of the adsorption plate 1. This ensures both sealing performance and prevents deformation from damaging the battery cells, and also ensures that the battery cells are adsorbed flatly on the detection plate 3.

[0026] The detection contact 32 is provided with a conductive layer, which improves the conductivity between the contact and the electrode and avoids poor contact. Furthermore, the conductive layer includes a gold-plated layer, which improves conductivity and reduces contact resistance, thereby enhancing the accuracy and reliability of the detection.

[0027] The detection contact 32 can also be used as a sampling probe.

[0028] To facilitate wiring, the detection board 3 is a PCB board with circuitry connected to the detection contact 32. This circuitry is directly integrated within the detection board 3, eliminating the need for external wiring, thus simplifying the overall structure and preventing gaps between the detection board 3 and the adsorption plate 1, thereby improving the reliability and stability of vacuum adsorption. An ultra-thin sealing gasket or sealant can be used to seal the connection between the detection board 3 and the adsorption plate 1.

[0029] To improve the sealing between the battery cell and the detection plate 3, the measuring device also includes a sealing ring. The sealing ring is installed on the top of the detection plate 3 and rests against the back of the battery cell. The detection contact 32 and the adsorption hole 31 are both located inside the sealing ring. The sealing ring prevents air leakage between the battery cell and the detection plate 3, ensuring a reliable vacuum, thereby allowing the battery cell to be evenly pressed onto the detection contact 32.

[0030] A measuring device for solar IBC cells has the following advantages: Non-contact measurement: Completely avoids physical contact with the front of the solar cell, eliminating the risk of surface damage caused by the testing process.

[0031] Unobstructed Surface: The measurement process is conducted without any obstructions to the surface of the solar cells, ensuring the uniformity of simulated light illumination on the surface of the solar cells, thereby improving the test accuracy.

[0032] Clearer identification of graphic defects: The front-side structure without grid blade obstruction facilitates EL image recognition, allowing graphic defects on the surface of the solar cell, such as hidden cracks and broken grids, to be presented and identified more clearly and accurately.

[0033] The pressure equalization unit ensures a balanced and stable contact between the battery cells and the contact unit.

[0034] The intake unit provides the necessary stable air pressure environment for the entire test system.

[0035] The technical principles of this utility model have been described above with reference to specific embodiments. These descriptions are merely for explaining the principles of this utility model and should not be construed as limiting the scope of protection of this utility model in any way. Based on this explanation, those skilled in the art can readily conceive of other specific embodiments of this utility model without inventive effort, and these embodiments will all fall within the protection scope of the claims of this utility model.

Claims

1. A measuring device for solar IBC cells, characterized in that, include: The light source unit is used to simulate sunlight. The detection plate (3) is provided with a number of detection contacts (32) and adsorption holes (31). The detection contacts (32) correspond one-to-one with the electrodes on the back of the battery cell. The adsorption holes (31) are arranged in an array to adsorb the battery cell. A pressure equalization unit is located below the detection plate (3) and communicates with the adsorption hole (31). It is used to adsorb the battery cell onto the detection plate (3) through the adsorption hole (31) so that the detection contact (32) is connected to the electrode. as well as An intake unit, connected to the pressure equalization unit, is used to generate negative pressure; The light source unit is located above the detection plate (3); The pressure equalization unit includes: The suction base (2) is provided with a suction groove (21) and an exhaust hole (22) communicating with the suction groove (21), and the exhaust hole (22) is connected to the suction unit; An adsorption plate (1) is disposed at the top of the air intake groove (21) and has several first through holes (11) communicating with the air intake groove (21). The first through holes (11) also communicate with the adsorption holes (31). A sealing ring is provided between the suction base (2) and the adsorption plate (1).

2. The measuring device for a solar IBC cell according to claim 1, characterized in that, The air intake groove (21) is provided with several support columns (25), and the support columns (25) abut against the adsorption plate (1).

3. The measuring device for a solar IBC cell according to claim 1, characterized in that, The exhaust holes (22) are symmetrically arranged on both sides of the intake groove (21).

4. The measuring device for a solar IBC cell according to claim 1, characterized in that, The suction base (2) is provided with a sealing groove (23), and the sealing ring is located in the sealing groove (23).

5. The measuring device for a solar IBC cell according to claim 1, characterized in that, The detection contact (32) is provided with a conductive layer.

6. The measuring device for a solar IBC cell according to claim 5, characterized in that, The conductive layer includes a gold-plated layer.

7. A measuring device for a solar IBC cell according to any one of claims 1 to 6, characterized in that, The detection board (3) is a PCB board, and the detection board (3) is provided with a circuit that communicates with the detection contact (32).

8. A measuring device for a solar IBC cell according to any one of claims 1 to 6, characterized in that, Also includes: A sealing ring is provided on the detection plate (3) and is used to abut against the back of the battery cell. The detection contact (32) and the adsorption hole (31) are both located inside the sealing ring.

9. A measuring device for a solar IBC cell according to any one of claims 1 to 6, characterized in that, The adsorption holes (31) are evenly distributed around the detection contact (32).

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