Main-grid-free solar cell detection device

Abstract

The utility model relates to the field of solar cell detection, in particular to a main-grid-free solar cell detection device, which comprises a transmission device, a detection device and a detector, the transmission device is used for transmitting solar cells, the detection device is divided into two parts which are respectively located above and below the transmission device, and the solar cells are transmitted to the position between the detection devices located above and below the transmission device through the transmission device. The detection device is electrically connected with the upper surface and the lower surface of the solar cell, and the detection device is connected with the detector through a wire. According to the utility model, the test deviation caused by poor contact due to local thin solar cell can be avoided, the solar cell thickness detection device has good adaptability to the thickness of the solar cell, has high detection speed, and improves the test accuracy by connecting the detector.

Description

Technical Field

[0001] The utility model relates to the technical field of solar cell detection, in particular to a busbar-less solar cell detection device. Background Art

[0002] Solar cell technology has advanced rapidly in recent years. The number of busbars in solar cells has grown from the original two to the current SMBB (dense busbar, 12 or more). This has made reducing silver paste consumption one of the most important cost-cutting measures in the cell manufacturing process. Consequently, busbar-less cells have become a popular process for reducing silver consumption and improving efficiency.

[0003] Conventional probe arrays used to test the electrical performance of solar cells use numerous small probes pressed against the busbar to transmit current. However, busbarless cells are designed without the busbar, making conventional probes incapable of testing them. Currently available busbarless probes use a single strip of conductive metal to conduct electricity, placing high demands on the thickness of the entire cell and the height of the busbar lines. This can easily lead to poor contact in thin areas and cause test deviations. Utility Model Content

[0004] (1) The present invention provides a busbar-less solar cell detection device, which alleviates the technical problem in the prior art of busbar-less probe detection of solar cells, which easily causes poor contact in locally thin areas and results in test deviation.

[0005] (2) Technical solution

[0006] In order to solve the above technical problems, the embodiment of the present utility model provides a busbarless solar cell detection device, comprising a transmission device, a detection device and a detector;

[0007] The transmission device is used to transmit solar cells. The detection device is divided into two parts, which are respectively located above and below the transmission device. The solar cells are transmitted through the transmission device to between the detection devices located above and below the transmission device. The detection device is electrically connected to the upper and lower surfaces of the solar cells, and the detection device is connected to the detector through a wire.

[0008] Furthermore, the transmission device includes a metal transmission belt, the solar cell is arranged on the metal transmission belt, and the detection device located below the metal transmission belt is electrically connected to the lower surface of the solar cell.

[0009] Furthermore, the transmission device also includes at least two rollers and a power member, the metal transmission belt is respectively connected to each of the rollers, each of the rollers is connected to the output end of the power member, and the rollers drive the metal transmission belt to transmit.

[0010] Furthermore, the detection device includes a first detection component and a second detection component, the first detection component is arranged above the metal conveyor belt, and the second detection component is arranged on the lower surface of the metal conveyor belt, the first detection component is electrically connected to the upper surface of the solar cell, and the second detection component is electrically connected to the lower surface of the solar cell through the metal conveyor belt.

[0011] Furthermore, the first detection component includes multiple probes and metal strips, and the multiple probes are arranged above the metal conveyor belt, and the lower end of each probe is against the upper surface of the metal strip, and the lower surface of the metal strip is used to connect with the solar cell.

[0012] Furthermore, a spring is provided inside the probe, and the probe can be extended and retracted along the vertical direction of the solar cell.

[0013] Furthermore, a flexible conductive strip is provided at the lower end of the metal strip.

[0014] Furthermore, the first detection component also includes a fiberglass board, which is connected to the upper end of each probe to fix the multiple probes, and a conductive wire is provided inside the fiberglass board, and the fiberglass board is connected to the detector through a wire.

[0015] Furthermore, the second detection component includes a load-bearing conductive strip, which is arranged on the inner side of the upper surface of the metal conveyor belt, and the load-bearing conductive strip is electrically connected to the lower surface of the solar cell through the metal conveyor belt, and the load-bearing conductive strip is connected to the detector through a wire.

[0016] Furthermore, it also includes a light source, which is arranged above the solar cell and is used to illuminate the solar cell to enable it to generate electricity.

[0017] Beneficial effects of the utility model:

[0018] The utility model provides a main grid-free solar cell detection device, which includes a transmission device, a detection device and a detector. The solar cell is placed on the transmission device and is transmitted through the transmission device. When the solar cell is transmitted between the detection devices above and below the transmission device, the detection device is electrically connected to the entire upper and lower surfaces of the solar cell and performs detection, thereby avoiding poor contact due to local thinness of the solar cell to cause deviation in the test, and has good adaptability to the thickness of the solar cell. At the same time, the detection device is directly connected to the detector through a wire, can quickly perform detection, has a high detection speed, and also improves the accuracy of the test by connecting to the detector. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] 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 any creative work.

[0020] Figure 1 A schematic structural diagram of a busbar-less solar cell detection device provided in an embodiment of the present utility model.

[0021] icon:

[0022] 100-solar cell;

[0023] 200-wire;

[0024] 300-metal conveyor belt; 301-roller;

[0025] 400-probe; 401-metal strip; 402-flexible conductive strip; 403-fiberglass board;

[0026] 500-load-bearing conductive strip;

[0027] 600-light source. DETAILED DESCRIPTION

[0028] The following will clearly and completely describe the technical solutions of the present invention in conjunction with the embodiments. Obviously, the embodiments described are only a part of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0029] In the description of this utility model, it should be noted that the terms "upper" and "lower" and other terms indicating orientations or positional relationships are based on the orientations or positional relationships shown in the accompanying drawings and are intended solely to facilitate the description of this utility model and simplify the description. They do not indicate or imply that the devices or components referred to must have a specific orientation, be constructed, or operate in a specific orientation. Therefore, they should not be construed as limitations on this utility model. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0030] In the description of the present invention, it should be noted that, unless otherwise expressly specified or limited, the terms "installation", "connection", and "connection" 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, an indirect connection through an intermediate medium, or a connection between two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to the specific circumstances. In addition, in the description of the present invention, unless otherwise specified, "plurality" means two or more.

[0031] like Figure 1 As shown, the utility model provides a busbar-less solar cell detection device, including a transmission device, a detection device and a detector; the transmission device is used to transmit the solar cell 100, and the detection device is divided into two parts, which are respectively located above and below the transmission device. The solar cell 100 is transmitted through the transmission device to between the detection devices located above and below the transmission device. The detection device is electrically connected to the upper and lower surfaces of the solar cell 100, and the detection device is connected to the detector through a wire 200.

[0032] In this embodiment, a transmission device, a detection device and a detector are included. The solar cell 100 is placed on the transmission device and is transmitted through the transmission device. When the solar cell 100 is transmitted between the detection devices above and below the transmission device, the detection device is electrically connected to the entire upper and lower surfaces of the solar cell 100 and performs detection, thereby avoiding poor contact due to local thinness of the solar cell 100, which may cause deviation in the test. It has good adaptability to the thickness of the solar cell 100. At the same time, the detection device is directly connected to the detector through the wire 200, which can quickly perform detection and has a high detection speed. The accuracy of the test is also improved by connecting to the detector.

[0033] Among them, preferably, the detector is selected as a Halm tester, which can quickly and accurately detect the performance of various electronic components, so it can provide reliable quality assurance for the entire detection process of the solar cell 100.

[0034] The detection device and the detector are directly connected through the wire 200. When the detection device is in contact with the upper and lower surfaces of the solar cell 100, the electrical signal is transmitted to the detector through the wire 200, and the detector is used to identify whether the electrical performance of the solar cell 100 is qualified.

[0035] When the solar cell 100 generates electricity and starts detection, the current is transmitted through the detection device on the upper surface of the solar cell 100 through the wire 200 to the positive electrode of the detector, and then transmitted through the negative electrode of the detector through the wire to the detection device on the lower surface of the solar cell 100 to form a loop.

[0036] According to an embodiment provided by the present utility model, Figure 1 As shown, the transmission device includes a metal transmission belt 300 , the solar cell 100 is arranged on the metal transmission belt 300 , and the detection device located below the metal transmission belt 300 is electrically connected to the lower surface of the solar cell 100 .

[0037] In this embodiment, the transmission device includes a metal transmission belt 300, and the solar cell 100 is placed on the metal transmission belt 300. The metal transmission belt 300 contacts the grid line on the back of the solar cell 100. After the solar cell 100 is output to the detection position by using the metal transmission belt 300, the electrical performance of the solar cell 100 is tested together with the detection device arranged on the upper surface of the metal transmission belt 300 and the detection device arranged above the transmission device.

[0038] Preferably, the metal conveyor belt 300 is made of stainless steel and copper, and has a width of 3-5 mm.

[0039] According to an embodiment provided by the present utility model, Figure 1 As shown, the transmission device also includes at least two rollers 301 and a power piece. The metal transmission belt 300 is respectively connected to each roller 301, and each roller 301 is connected to the output end of the power piece. The roller 301 drives the metal transmission belt 300 for transmission.

[0040] In this embodiment, the transmission device further includes at least two rollers 301. Preferably, the number of rollers 301 is set to two, and the two rollers 301 are spaced apart and have the same size and shape. The metal transmission belt 300 is wound around the two rollers 301 as both ends. The rollers 301 are in transmission connection with the output end of the power element. The power element drives the rollers 301 to rotate, so that the metal transmission belt 300 can rotate driven by the rollers 301 to achieve the purpose of transmitting the solar cells 100. Preferably, the power element can be a motor, a cylinder, or an oil cylinder.

[0041] The outer shell of the roller 301 is made of phenolic or nylon insulation to ensure the accuracy of detecting the electrical properties of the solar cell 100 .

[0042] Among them, optionally, the roller 301 can also be replaced by a rotating shaft, gear or other components that can drive the metal conveyor belt 300 to transport the solar cell 100. Its purpose does not deviate from the design concept of the present invention and should fall within the protection scope of the present invention.

[0043] According to an embodiment provided by the present utility model, Figure 1 As shown, the detection device includes a first detection component and a second detection component. The first detection component is arranged above the metal conveyor belt 300, and the second detection component is arranged on the lower surface of the metal conveyor belt 300. The first detection component is electrically connected to the upper surface of the solar cell 100, and the second detection component is electrically connected to the lower surface of the solar cell 100 through the metal conveyor belt 300.

[0044] In this embodiment, the detection device includes a first detection component and a second detection component, wherein, preferably, the first detection component is located above the metal conveyor belt 300, and the second detection component is located on the lower surface of the metal conveyor belt 300. After the solar cell 100 is transported to the detection position using the metal conveyor belt 300, the electrical performance of the solar cell 100 is tested because the first detection component and the second detection component are directly or indirectly electrically connected to the upper and lower surfaces of the solar cell 100, respectively. After the solar cell 100 starts generating electricity, the electricity is transmitted from its upper surface into the first detection component through the wire 200 to the positive electrode of the detector, and then through the negative electrode of the detector through the wire 200 to the second detection component to form a circuit.

[0045] According to an embodiment provided by the present utility model, Figure 1 As shown, the first detection component includes multiple probes 400 and a metal strip 401. The multiple probes 400 are arranged above the metal conveyor belt 300, and the lower end of each probe 400 is against the upper surface of the metal strip 401. The lower surface of the metal strip 401 is used to connect with the solar cell 100.

[0046] In this embodiment, the first detection component includes multiple probes 400 and a metal strip 401. The multiple probes 400 are arranged above the metal conveyor belt 300. The multiple probes 400 are arranged in parallel to form a probe row used for detecting the upper side of the solar cell 100, and the lower end of each probe 400 is against the upper surface of the metal strip 401. The lower surface of the metal strip 401 is used to connect with the solar cell 100. During detection, the probe is pressed down to contact the upper surface of the solar cell 100 through the metal strip 401, so that it can contact the front fine grid line of the main grid-free solar cell 100 to facilitate electrical performance detection.

[0047] Preferably, the probe 400 is provided with a spring inside, and can be extended and retracted along a vertical direction of the portion where it meets the upper surface of the solar cell 100 .

[0048] According to an embodiment provided by the present utility model, Figure 1 As shown, a flexible conductive strip 402 is further provided at the lower end of the metal strip 401 .

[0049] In this embodiment, a flexible conductive strip 402 is further provided at the lower end of the metal strip 401. During testing, the probe is pressed downward to drive the metal strip 401 and the flexible conductive strip 402 downward to contact the upper surface of the solar cell 100, contacting the front fine grid lines of the busbar-less solar cell 100, and testing its electrical properties.

[0050] The provision of the flexible conductive strips 402 can protect the upper surface of the solar cell 100 from being damaged by friction during the inspection process, thereby ensuring the quality of the solar cell 100 .

[0051] According to an embodiment provided by the present utility model, Figure 1 As shown, the first detection component also includes a fiberglass board 403, which is connected to the upper end of each probe 400 to fix multiple probes 400, and a conductive wire is provided inside the fiberglass board 403. The fiberglass board 403 is connected to the detector through a wire 200.

[0052] In this embodiment, the first detection component further includes a fiberglass board 403 , and a plurality of probes 400 are arranged in parallel at intervals below the fiberglass board 403 . The detection probes 400 are fixed by the fiberglass board 403 to ensure the accuracy and efficiency of the detection process.

[0053] Conductive wires are provided inside the fiberglass board 403 , and the fiberglass board 403 is connected to a detector via a wire 200 , thereby transmitting the current of the multiple probes 400 to a bus and transmitting the signal to the detector to judge the electrical performance of the solar cell 100 .

[0054] According to an embodiment provided by the present utility model, Figure 1 As shown, the second detection component includes a load-bearing conductive strip 500 , which is arranged on the inner side of the upper surface of the metal conveyor belt 300 , and the load-bearing conductive strip 500 is electrically connected to the lower surface of the solar cell 100 through the metal conveyor belt 300 .

[0055] In this embodiment, the second detection component includes a load-bearing conductive strip 500. Optionally, the load-bearing conductive strip 500 is arranged on the inner side of the upper surface of the metal conveyor belt 300 and is connected to the lower surface of the solar cell 100 through the metal conveyor belt 300. The provision of the load-bearing conductive strip 500 can support the metal conveyor belt 300 and can also transmit current to facilitate the detection of the electrical properties of the back of the solar cell 100.

[0056] Among them, preferably, the load-bearing conductive strip 500 is made of stainless steel, copper or aluminum, with a width set to 4-6 mm, and the position of the load-bearing conductive strip 500 is symmetrical to the position of the fiberglass board 403, thereby ensuring the accuracy of the electrical performance detection of the solar cell 100.

[0057] Preferably, the load-bearing conductive strip 500 is connected to the detector via the wire 200 to generate a signal from the current generated on the back of the solar cell 100 during the detection process and transmit it to the detector to judge the electrical performance of the solar cell 100 .

[0058] According to an embodiment provided by the present utility model, Figure 1 As shown, a light source 600 is also included. The light source 600 is disposed above the solar cell 100 and is used to illuminate the solar cell 100 so that it can generate electricity.

[0059] In this embodiment, the detection device is further provided with a light source 600, which is arranged above the detection position of the solar cell 100. The light source 600 is used to illuminate the solar cell 100 so that it can generate electricity. Then, the detection device is used to transmit the current generated during power generation to the transmitter to judge the electrical performance of the solar cell 100.

[0060] Among them, preferably, the light source 600 is a xenon headlight, and the brightness efficiency of the xenon headlight is three times that of the halogen lamp, so the use of the xenon headlight can facilitate detection.

[0061] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A busbarless solar cell detection device, characterized in that: including a transmission device, a detection device and a detector; The transmission device is used to transmit a solar cell (100); the detection device is divided into two parts, and is respectively located above and below the transmission device; the solar cell (100) is transmitted through the transmission device to between the detection devices located above and below the transmission device; the detection device is electrically connected to the upper and lower surfaces of the solar cell (100); and the detection device is connected to the detector via a wire (200).

2. The busbar-less solar cell detection device according to claim 1, characterized in that: The transmission device comprises a metal transmission belt (300), the solar cell (100) is arranged on the metal transmission belt (300), and the detection device located below the metal transmission belt (300) is electrically connected to the lower surface of the solar cell (100).

3. The busbar-less solar cell detection device according to claim 2, characterized in that: The transmission device further comprises at least two rollers (301) and a power member, the metal transmission belt (300) is respectively connected to each of the rollers (301), each of the rollers (301) is connected to the output end of the power member, and the rollers (301) drive the metal transmission belt (300) to transmit.

4. The busbar-less solar cell detection device according to claim 2, characterized in that: The detection device comprises a first detection component and a second detection component, wherein the first detection component is arranged above the metal conveyor belt (300), and the second detection component is arranged on the lower surface of the metal conveyor belt (300), the first detection component is electrically connected to the upper surface of the solar cell (100), and the second detection component is electrically connected to the lower surface of the solar cell (100) through the metal conveyor belt (300).

5. The busbar-less solar cell detection device according to claim 4, characterized in that: The first detection component comprises a plurality of probes (400) and a metal strip (401), wherein the plurality of probes (400) are arranged above the metal conveyor belt (300), and the lower end of each of the probes (400) abuts against the upper surface of the metal strip (401), and the lower surface of the metal strip (401) is used to connect with the solar cell (100).

6. The busbar-less solar cell detection device according to claim 5, characterized in that: A spring is provided inside the probe (400), and the probe (400) can be extended and retracted along a vertical direction of the solar cell sheet (100).

7. The busbar-less solar cell detection device according to claim 5, characterized in that: A flexible conductive strip (402) is further provided at the lower end of the metal strip (401).

8. The busbar-less solar cell detection device according to claim 5, characterized in that: The first detection component further includes a fiberglass board (403), the fiberglass board (403) being connected to the upper end of each probe (400) to fix the plurality of probes (400), and a conductive wire being provided inside the fiberglass board (403), and the fiberglass board (403) being connected to the detector via a wire (200).

9. The busbar-less solar cell detection device according to claim 4, characterized in that: The second detection component comprises a load-bearing conductive strip (500), the load-bearing conductive strip (500) being arranged on the inner side of the upper surface of the metal transmission belt (300), and the load-bearing conductive strip (500) being electrically connected to the lower surface of the solar cell (100) through the metal transmission belt (300), and the load-bearing conductive strip (500) being connected to the detector via a wire (200).

10. A busbar-less solar cell detection device according to any one of claims 1 to 9, characterized in that: It also includes a light source (600), which is arranged above the solar cell (100) and is used to illuminate the solar cell (100) to enable it to generate electricity.

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