Back contact solar cell testing device and testing system

Abstract

The utility model belongs to the technical field of battery manufacturing, and particularly relates to a back contact solar cell testing device and system. The back contact solar cell testing device comprises a first mounting plate, a second mounting plate and a detection assembly, the first mounting plate and the second mounting plate are stacked in the thickness direction, the first mounting plate is provided with a first mounting hole, the second mounting plate is provided with a second mounting hole, the second mounting hole is communicated with the first mounting hole in the thickness direction, and a limiting hole section is defined by the second mounting hole and the first mounting hole; part of the detection assembly is clamped in the limiting hole section, and the two ends of the detection assembly extend out of the first mounting hole and the second mounting hole correspondingly. The detection assembly is clamped and fixed through the double-layer mounting plate so as to ensure that the detection assembly is stably mounted, the deviation risk when the detection assembly is pressed is reduced, and it is ensured that the detection assembly can be accurately aligned with the grid line on the battery piece.

Description

Technical Field

[0001] The present application belongs to the technical field of solar cell manufacturing, and in particular, relates to a back-contact solar cell testing device and a testing system. Background Art

[0002] BC battery (Back Contact) is a battery with all electrodes on the back of the battery. The positive and negative electrodes of the BC battery are cross-distributed on the back of the battery cell. There is a strict physical isolation between the positive and negative electrodes to prevent the negative electrodes from being short-circuited. Its characteristics are: there is no grid line blocking the front of the battery, which increases the light-receiving area of ​​the battery and thus improves the battery efficiency; and there is no welding on the front of the battery when the components are packaged, which is more beautiful.

[0003] IV testing (Intensity-Voltage) is to evaluate the performance of solar cells. The IV testing machine uses tooling to clamp the cells and connects them through probes. The probes are connected to the current or voltage of the positive and negative electrodes. The IV testing machine collects the test data to calculate the electrical performance of the battery. Therefore, during the test, the tooling should accurately clamp the cells, otherwise the probes will not be able to accurately align when connected to the cells, which will not only affect the test, but may also cause the probes to be accidentally touched and damaged. The positive and negative electrodes of traditional crystalline silicon solar cells are on the front and back sides of the battery, respectively. The IV testing device for solar cells is mainly suitable for structures with grid lines on both sides of the solar cell. The principle is that the two sides of the battery are positive and negative, respectively, and the upper and lower probes contact the grid lines on both sides of the battery for testing.

[0004] However, the probes in the existing IV detection devices are generally fixed by a single plate, and the fixing method of the probes is not firm. During the test, there is a high risk that the probes will be offset due to pressure, making it difficult to align the probe row with the grid line. Utility Model Content

[0005] The present application provides a back-contact solar cell testing device and a testing system to solve the technical problem that the probes in the existing structure are easily offset due to pressure, thereby making it difficult for the probe row to align with the grid line.

[0006] According to one aspect of the present application, a back-contact solar cell testing device is provided, comprising a first mounting plate, a second mounting plate and a detection assembly; the first mounting plate and the second mounting plate are stacked in a thickness direction, the first mounting plate is provided with a first mounting hole, the second mounting plate is provided with a second mounting hole, the second mounting hole is connected to the first mounting hole in the thickness direction and together form a limited hole section; part of the detection assembly is clamped in the limited hole section, and both ends of the detection assembly extend out of the first mounting hole and the second mounting hole, respectively.

[0007] In an optional scheme of the present application, the first mounting hole includes a first extension section and a first limiting section, the inner diameter of the first limiting section is larger than the inner diameter of the first extension section, and the first limiting section is arranged close to the second mounting hole in the thickness direction and together with the second mounting hole forms a limiting hole section; and / or, the second mounting hole includes a second extension section and a second limiting section, the inner diameter of the second limiting section is larger than the inner diameter of the second extension section, and the second limiting section is arranged close to the first mounting hole in the thickness direction and together with the first mounting hole forms a limiting hole section.

[0008] In an optional scheme of the present application, the detection assembly includes a first probe, a second probe and a syringe assembly; the syringe assembly is clamped in the limiting hole section, the first probe and the second probe are respectively movably connected to the axial ends of the syringe assembly, and part of the first probe extends out of the first mounting hole, and part of the second probe extends out of the second mounting hole.

[0009] In an optional solution of the present application, the syringe assembly includes a barrel and an elastic member; the barrel is clamped in the limiting hole section, and the elastic member is arranged in the barrel and has two ends respectively abutting against the first probe and the second probe.

[0010] In an optional scheme of the present application, the first mounting plate is formed with a plurality of first mounting hole rows arranged at intervals along the first direction, and each first mounting hole row includes a plurality of first mounting holes arranged at intervals along the second direction; the second mounting holes and the detection components are both multiple in number, and the plurality of second mounting holes are arranged in one-to-one correspondence with the plurality of first mounting holes, and each detection component is respectively penetrated through a corresponding second mounting hole and a first mounting hole.

[0011] In an optional solution of the present application, in two adjacent first mounting hole rows in the first direction, the first mounting holes in one first mounting hole row are staggered in the second direction with the first mounting holes in the other first mounting hole row.

[0012] In an optional solution of the present application, a circuit board is further included. The circuit board is arranged on a side of the second mounting plate away from the first mounting plate along the thickness direction and is connected to an end of the detection component extending out of the second mounting hole.

[0013] In an optional solution of the present application, the circuit board is provided with a wiring groove, in which a circuit is arranged; one end of the detection component extending out of the second mounting hole extends into the wiring groove to be connected to the circuit.

[0014] In an optional solution of the present application, there are multiple wiring troughs, and the multiple wiring troughs are arranged at intervals along the first direction; the ends of the detection components in the same row extending out of the second mounting holes all extend into the same wiring trough.

[0015] In an optional scheme of the present application, the first mounting plate is provided with a first positioning connection hole, the second mounting plate is provided with a second positioning connection hole and a third positioning connection hole, and the circuit board is provided with a fourth positioning connection hole; the first mounting plate is detachably connected to the second mounting plate through the first positioning connection hole and the second positioning connection hole; the circuit board is detachably connected to the second mounting plate through the fourth positioning connection hole and the third positioning connection hole.

[0016] According to another aspect of the present application, a testing system is provided, including a back-contact solar cell and the above-mentioned back-contact solar cell testing device, wherein one end of the detection component extending out of the first mounting hole is configured to contact the grid line of the back-contact solar cell.

[0017] In summary, the back contact solar cell testing device and testing system provided by the present application have at least the following beneficial effects:

[0018] In the present application, the first mounting plate and the second mounting plate are stacked in the thickness direction and the detection component is clamped and fixed in the limiting hole section formed by the first mounting hole and the second mounting hole. The detection component is clamped and fixed by the double-layer mounting plate to ensure that the detection component is firmly installed, reduce the risk of displacement of the detection component when it is under pressure, and ensure that the detection component can be accurately aligned with the grid line on the battery cell. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the specific implementation of the present application or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the specific implementation or the prior art description. Obviously, the drawings described below are some implementations of the present application. For those skilled in the art, other drawings can be obtained based on these drawings without creative work.

[0020] Figure 1 A schematic diagram of a back-contact solar cell testing device provided according to one embodiment of the present application at a viewing angle;

[0021] Figure 2 for Figure 1 An exploded view of the back contact solar cell test device in another perspective;

[0022] Figure 3 for Figure 1 A partial enlarged cross-sectional view at S in the middle;

[0023] Figure 4 for Figure 3 Diagram of the detection assembly is hidden.

[0024] The reference numerals are as follows:

[0025] 1000. Back contact solar cell test device;

[0026] 10. first mounting plate; 11. first mounting hole; 111. first extension section; 112. first limiting section; 12. first positioning connection hole;

[0027] 20, second mounting plate; 21, second mounting hole; 211, second extension section; 212, second limiting section; 22, second positioning connection hole; 23, third positioning connection hole;

[0028] 30. Detection assembly; 31. First probe; 32. Second probe; 33. Syringe assembly; 331. Cylinder; 332. Elastic member;

[0029] 40. circuit board; 41. fourth positioning connection hole;

[0030] B, wiring trough; C, limiting hole section; L1, first row of mounting holes; L2, second row of mounting holes. DETAILED DESCRIPTION

[0031] In the description of this application, if there is a feature defined as "first" or "second" for descriptive purposes only, it cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Features defined as "first" or "second" may explicitly or implicitly include at least one of the defined features. If the description of "plurality" appears, the general meaning is to include at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0032] In this application, unless otherwise clearly specified and limited, the terms such as "installed", "connected", "connected", "fixed" and so on should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integrated connection; it can be a mechanical connection or an electrical connection, it can be a direct connection, or it can be an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For those skilled in the art, the specific meanings of the above terms in this application can be understood according to the specific circumstances.

[0033] In the description of this specification, if the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" appear, it means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present application. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine the different embodiments or examples described in this specification and the features of the different embodiments or examples, unless they are contradictory.

[0034] It should be noted that BC batteries include busbar-type BC batteries and busbar-free BC batteries. The busbar-type BC batteries have wider busbars, and the probe can directly contact the busbars during IV testing, thereby achieving IV testing. However, for busbar-free BC batteries, since there are only cross-distributed fine grid lines on the back of the battery, the width of the fine grid lines and the spacing between the positive and negative fine grid lines are very small, it is impossible to use a conventional probe row structure to achieve contact and alignment between the probe and the positive and negative fine grid lines, making it difficult to achieve IV testing for busbar-free BC batteries.

[0035] In particular, the fixing method of the probe row in the existing structure is not firm. Because the width and spacing of the fine grid lines are too small, even if there is a slight deviation when the probe is squeezed, it will make it difficult for the probe row to align with the positive and negative fine grid lines, making it difficult to perform IV detection on main grid-free BC batteries.

[0036] To address this, the present application provides a novel back-contact solar cell testing device 1000 . Figure 1 It is a schematic diagram of a back-contact solar cell testing device 1000 provided according to one embodiment of the present application at a certain viewing angle. Figure 2 for Figure 1 FIG. 1 is an exploded view of the back-contact solar cell testing device 1000 at another viewing angle.

[0037] See also Figure 1 and Figure 2 The back contact solar cell testing device 1000 includes a first mounting plate 10 , a second mounting plate 20 and a detection assembly 30 .

[0038] The first mounting plate 10 and the second mounting plate 20 are stacked in the thickness direction. The first mounting plate 10 is provided with a first mounting hole 11, and the second mounting plate 20 is provided with a second mounting hole 21. The second mounting hole 21 is connected to the first mounting hole 11 in the thickness direction and together form a limited position hole section C.

[0039] Part of the detection assembly 30 is clamped in the limiting hole section C, and two ends of the detection assembly 30 extend out of the first mounting hole 11 and the second mounting hole 21 respectively.

[0040] In this embodiment, the first mounting plate 10 and the second mounting plate 20 are stacked along the thickness direction and the detection assembly 30 is clamped and fixed. The thickness direction here refers to the thickness direction of the first mounting plate 10 and the thickness direction of the second mounting plate 20.

[0041] Specifically, the first mounting plate 10 and the second mounting plate 20 are respectively provided with a first mounting hole 11 and a second mounting hole 21 , which are aligned in the thickness direction and together form a limiting hole section C, which is used to limit the installation position of the detection assembly 30 .

[0042] It can be seen that in the present application, the detection assembly 30 is clamped and fixed by a double-layer mounting plate to ensure that the detection assembly 30 is firmly installed, reduce the risk of displacement of the detection assembly 30 when under pressure, and ensure that the detection assembly 30 can be accurately aligned with the grid lines on the battery cell.

[0043] In an optional embodiment of the present application, the first mounting plate 10 is formed with a plurality of first mounting hole rows L1 arranged at intervals along the first direction, and each first mounting hole row L1 includes a plurality of first mounting holes 11 arranged at intervals along the second direction.

[0044] There are multiple second mounting holes 21 and multiple detection components 30. The multiple second mounting holes 21 are arranged in a one-to-one correspondence with the multiple first mounting holes 11. Each detection component 30 is respectively penetrated through a corresponding second mounting hole 21 and a corresponding first mounting hole 11.

[0045] In this embodiment, the first mounting holes 11 and the second mounting holes 21 are both multiple in number with respect to the number of detection components 30, and the multiple first mounting holes 11 and the multiple second mounting holes 21 are arranged in an array, so that the multiple first mounting holes 11 form a multiple first mounting hole rows L1 arranged at intervals along the first direction, and the multiple second mounting holes 21 form a multiple second mounting hole rows L2 arranged at intervals along the first direction.

[0046] It should be understood that the one-to-one alignment of the multiple second mounting holes 21 and the multiple first mounting holes 11 means that the second mounting holes 21 and the first mounting holes 11 are equal in number, and the multiple first mounting hole rows L1 and the multiple second mounting hole rows L2 are one-to-one aligned to form a multiple limiting hole segment rows arranged at intervals along the first direction. In other words, the limiting hole segments C are arranged in an array.

[0047] It can be understood that when each detection component 30 is accommodated in each limiting hole segment C one by one, the corresponding multiple detection components 30 are arranged in an array, that is, a detection component row structure is formed. In a specific application, each detection component row can correspond to a grid line on the matching battery cell.

[0048] In a further optional embodiment, in two adjacent first mounting hole rows L1 in the first direction, the first mounting holes 11 in one first mounting hole row L1 are staggered in the second direction with the first mounting holes 11 in the other first mounting hole row L1.

[0049] In this embodiment, in two adjacent first mounting hole rows L1 , the first mounting holes 11 in one are arranged offset with the first mounting holes 11 in the other row in the second direction.

[0050] Since the second mounting hole rows L2 are aligned one by one with the first mounting hole rows L1 , for two adjacent second mounting hole rows L2 , the second mounting holes 21 on one are staggered in the second direction with the second mounting holes 21 on the other.

[0051] In this way, for two adjacent limiting hole segment rows, the limiting hole segments C on one of them are arranged in a staggered manner with the limiting hole segments C on the other row in the second direction.

[0052] Correspondingly, for two adjacent detection component rows, the detection components 30 on one of them are arranged in a staggered manner with the detection components 30 on the other in the second direction. With such a layout, the space between the first mounting plate 10 and the second mounting plate 20 can be fully utilized to correspondingly open more mounting holes, so that more rows of limit hole segments can be formed, and more rows of detection components can be further formed to adapt to the situation where the grid lines are arranged more densely, that is, more suitable for IV detection of busbar-free BC batteries.

[0053] exist Figure 2 In the illustrated embodiment, the first direction is the length direction of the first mounting plate 10 and the second mounting plate 20 , and the second direction is the width direction of the first mounting plate 10 and the second mounting plate 20 .

[0054] Figure 3 for Figure 1 The back contact solar cell testing device 1000 further comprises a circuit board 40 which is arranged on the side of the second mounting plate 20 away from the first mounting plate 10 along the thickness direction and connected to the end of the detection assembly 30 extending out of the second mounting hole 21 .

[0055] In this embodiment, when a double-layer mounting plate is used to clamp and fix the detection assembly 30, an additional layer of circuit board 40 is added and electrically connected to the detection assembly 30 to collect electrical parameters.

[0056] Specifically, the circuit board 40 is fixedly mounted on the side of the second mounting plate 20 away from the first mounting plate 10, that is, the back contact solar cell test device 1000 adopts a three-layer board stacking assembly structure of the first mounting plate 10, the second mounting plate 20 and the circuit board 40 stacked in sequence along the thickness direction. Among them, the first mounting plate 10 cooperates with the second mounting plate 20 to fix the detection assembly 30, and the circuit board 40 is used to collect electrical parameters transmitted via the detection assembly 30.

[0057] In some optional embodiments, the detection assembly 30 includes a first probe 31 , a second probe 32 and a syringe assembly 33 .

[0058] The syringe assembly 33 is clamped in the limiting hole section C, and the first probe 31 and the second probe 32 are movably connected to the axial ends of the syringe assembly 33 respectively, and part of the first probe 31 extends out of the first mounting hole 11, and part of the second probe 32 extends out of the second mounting hole 21.

[0059] In this embodiment, the detection assembly 30 is a double telescopic probe structure consisting of a first probe 31, a second probe 32 and a syringe assembly 33. Specifically, the first probe 31 is movably connected to one axial end of the syringe assembly 33 and can be axially telescopic, and the second probe 32 is movably connected to the other axial end of the syringe assembly 33 and can be axially telescopic.

[0060] In the illustrated embodiment, the first probe 31 is used to abut against the gate line on the battery cell, and the second probe 32 abuts against the circuit board 40, so that the battery cell is electrically connected to the circuit board 40 to collect electrical parameters.

[0061] It should be understood that since the probe can be extended and retracted in the axial direction, the probe is prevented from being rigidly connected to the battery cell and the circuit board 40, thus ensuring that the probe always provides pre-pressure to the battery cell and the circuit board 40, ensuring contact reliability, that is, ensuring electrical connection reliability. In addition, ensuring that the pressing position of the battery cell is fixed can ensure that the extension height of the first probe 31 is consistent, and since the first probe 31 is movable, the risk of scratching the battery cell is reduced.

[0062] It should be noted that, here, the axial direction of the syringe assembly 33 is also the thickness direction, that is, the first probe 31 and the second probe 32 can telescopically move in the thickness direction.

[0063] In a further optional embodiment, the syringe assembly 33 includes a barrel 331 and an elastic member 332. The barrel 331 is clamped in the limiting hole section C, and the elastic member 332 is disposed in the barrel 331 and has two ends respectively abutting against the first probe 31 and the second probe 32.

[0064] In this embodiment, the syringe assembly 33 is composed of a cylinder 331 and an elastic member 332. The elastic member 332 is located inside the cylinder 331. The first probe 31 and the second probe 32 are respectively movably connected to the axial ends of the cylinder 331 and have the freedom of movement along the axial direction under the action of the elastic member 332.

[0065] In the illustrated embodiment, under the action of the circuit board 40, the second probe 32 always maintains a retracted state, that is, the elastic member 332 is always in a compressed state. When performing detection, the first probe 31 is pressed down and the elastic member 332 is further compressed. The first probe 31 and the second probe 32 can provide pre-pressure to the battery cell and the circuit board 40 respectively under the action of the elastic member 332 to ensure electrical connection.

[0066] It should be understood that the entire detection assembly 30 should be a conductive element. In a specific application, the elastic member 332 is a compression spring, but it is certainly not limited to this. For example, it can also be an elastic sheet.

[0067] Figure 4 for Figure 3 The schematic diagram of the detection assembly 30 is hidden. Figure 4 In an optional embodiment, the first mounting hole 11 includes a first extension section 111 and a first limiting section 112, the inner diameter of the first limiting section 112 is larger than the inner diameter of the first extension section 111, and the first limiting section 112 is arranged close to the second mounting hole 21 in the thickness direction and encloses the limiting hole section C together with the second mounting hole 21.

[0068] In this embodiment, the first mounting hole 11 is a stepped hole and is composed of a first extension section 111 and a first limiting section 112, wherein the opening size of the first limiting section 112 is larger than the opening size of the first extension section 111 and is located on the side close to the second mounting hole 21, thereby forming a limiting hole section C in cooperation with the second mounting hole 21.

[0069] In another optional embodiment, the second mounting hole 21 includes a second extension section 211 and a second limiting section 212, the inner diameter of the second limiting section 212 is larger than the inner diameter of the second extension section 211, and the second limiting section 212 is arranged close to the first mounting hole 11 in the thickness direction and together with the first mounting hole 11 forms a limiting hole section C.

[0070] In this embodiment, the second mounting hole 21 is a stepped hole and is composed of a second extension section 211 and a second limiting section 212, wherein the opening size of the second limiting section 212 is larger than the opening size of the second extension section 211 and is located on a side close to the first mounting hole 11, thereby forming a limiting hole section C in cooperation with the first mounting hole 11.

[0071] In another optional embodiment, the first mounting hole 11 and the second mounting hole 21 are both stepped holes. Specifically, the first limiting section 112 cooperates with the second limiting section 212 to enclose and form a limiting hole section C.

[0072] exist Figure 4 In the illustrated embodiment, the first mounting hole 11 and the second mounting hole 21 are both stepped circular holes, the aperture of the first limiting section 112 is the same as the aperture of the second limiting section 212, and together they form a limiting hole section C. Figure 3 In the illustrated embodiment, the syringe assembly 33 is clamped at the limiting hole section C, the first probe 31 passes through the first extension section 111 and partially extends out of the first mounting hole 11 , and the second probe 32 passes through the second extension section 211 and partially extends out of the second mounting hole 21 .

[0073] It should be noted that the shapes of the first mounting hole 11 and the second mounting hole 21 are not limited to round holes, and should be adaptively adjusted according to the shape of the syringe assembly 33 .

[0074] In some optional embodiments, the circuit board 40 is provided with a wiring groove B, and a circuit is provided in the wiring groove B. One end of the detection component 30 extending out of the second mounting hole 21 extends into the wiring groove B to be connected to the circuit.

[0075] In this embodiment, wire grooves B are provided on the circuit board 40 for installing wires, and these wires are used to collect electrical parameters transmitted from the detection assembly 30 .

[0076] In the illustrated embodiment, the detection assembly 30 is a movable double-telescopic probe structure, wherein the second probe 32 abuts against the bottom wall of the wire groove B and is connected to the wire in the wire groove B.

[0077] In a further optional embodiment, there are multiple wiring troughs B, and the multiple wiring troughs B are arranged at intervals along the first direction. As can be seen from the foregoing, in this embodiment, the detection components 30 can adopt an array arrangement structure, and further, the ends of the detection components 30 in the same row extending out of the second mounting holes 21 all extend into the same wiring trough B.

[0078] In this embodiment, the circuit board 40 is provided with a plurality of wiring grooves B arranged at intervals along the first direction, and the wiring grooves B extend along the second direction. A plurality of detection component rows are matched through the plurality of wiring grooves B, and one end of the detection components 30 in the same row extending out of the second mounting hole 21 is located in the same wiring groove B to be connected to the corresponding circuit in the same wiring groove B. In this way, the arrangement of the detection components 30 is more compact, and the connection between the detection components 30 and the grid lines on the battery cells can be adjusted by changing the circuit design in the wiring grooves B, so that the arrangement is more flexible.

[0079] In a specific application, the same wiring trough B can correspond to and match at least one row of detection components 30. In other words, one wiring trough B can be adapted to, for example, 1 row, 2 rows, 3 rows, or 4 rows of detection components 30, and the design can be adjusted according to demand.

[0080] It should be noted that the above-mentioned detection component row is a probe row. In the illustrated embodiment, one end of the detection component 30 extending out of the second mounting hole 21 is a second probe 32 .

[0081] In some optional embodiments, the first mounting plate 10 is provided with a first positioning connection hole 12 , the second mounting plate 20 is provided with a second positioning connection hole 22 and a third positioning connection hole 23 , and the circuit board 40 is provided with a fourth positioning connection hole 41 .

[0082] The first mounting plate 10 is detachably connected to the second mounting plate 20 via the first positioning and connecting holes 12 and the second positioning and connecting holes 22. The circuit board 40 is detachably connected to the second mounting plate 20 via the fourth positioning and connecting holes 41 and the third positioning and connecting holes 23.

[0083] In this embodiment, the first mounting plate 10 and the second mounting plate 20 align the first positioning connection holes 12 and the second positioning connection holes 22 to achieve one-to-one alignment of the first mounting holes 11 on the first mounting plate 10 and the second mounting holes 21 on the second mounting plate 20, and fastening connectors (including, for example, screws, pins, etc.) are inserted into the aligned first positioning connection holes 12 and the second positioning connection holes 22 to achieve a detachable connection.

[0084] The circuit board 40 and the second mounting plate 20 align the third positioning connection hole 23 and the fourth positioning connection hole 41 to align each wiring groove B with the corresponding detection component row, and fastening connectors (including, for example, screws, pins, etc.) are inserted into the aligned third positioning connection hole 23 and the fourth positioning connection hole 41 to achieve a detachable connection.

[0085] As can be seen from the above, the detection component 30 is fixed by the upper and lower double-layer mounting plates. It should be understood that when it is necessary to replace individual detection components 30, it is only necessary to remove the first mounting plate 10 and replace the corresponding detection component 30. The positions of other detection components 30 that do not need to be replaced are determined by the second mounting plate 20, which makes replacement convenient and quick.

[0086] It should be noted that, for the back-contact solar cell test device provided in the present application, the holes provided on the first mounting plate 10 are composed of the first mounting hole 11 and the first positioning connection hole 12, and the first mounting plate 10 does not have a negative pressure adsorption structure. The negative pressure adsorption structure here may include, for example, a negative pressure adsorption hole or a negative pressure adsorption groove.

[0087] In the prior art, negative pressure adsorption holes are also provided on the plate for fixing the probe, and the negative pressure adsorption holes are connected to the negative pressure device to form negative pressure for fixing the battery cell. However, in the present application, the design of the negative pressure adsorption holes is cancelled to ensure that the mounting holes have a high density design. Accordingly, the detection assembly 30 also has a high density to adapt to the situation where the grid line width is small and the distance between the grid lines is small.

[0088] Another aspect of the present application provides a testing system, which includes a back-contact solar cell and the above-mentioned back-contact solar cell testing device 1000, wherein one end of the detection component 30 extending out of the first mounting hole 11 is configured to contact the grid line of the back-contact solar cell.

[0089] In this embodiment, the test system can be an IV detection system for detecting back-contact solar cells. Since the back-contact solar cell test device 1000 has a plurality of detection components 30 arranged with high precision and high density, it is particularly suitable for back-contact solar cells without a main grid. Of course, the test system also has other advantages brought by the back-contact solar cell test device 1000, which will not be repeated here one by one.

[0090] Although the embodiments of the present application have been shown and described above, it can be understood that the above embodiments are exemplary and cannot be understood as limitations on the present application. Those skilled in the art can change, modify, replace and modify the above embodiments within the scope of the present application.

Claims

1. A back contact solar cell testing device, characterized in that: It comprises a first mounting plate (10), a second mounting plate (20) and a detection assembly (30); The first mounting plate (10) and the second mounting plate (20) are stacked in a thickness direction, the first mounting plate (10) is provided with a first mounting hole (11), the second mounting plate (20) is provided with a second mounting hole (21), the second mounting hole (21) is connected to the first mounting hole (11) in the thickness direction and together form a limited hole section (C); Part of the detection component (30) is clamped in the limiting hole section (C), and two ends of the detection component (30) extend out of the first mounting hole (11) and the second mounting hole (21) respectively.

2. The back contact solar cell testing device according to claim 1, characterized in that: The first mounting hole (11) comprises a first extending section (111) and a first limiting section (112), the inner diameter of the first limiting section (112) is larger than the inner diameter of the first extending section (111), and the first limiting section (112) is arranged close to the second mounting hole (21) in the thickness direction and together with the second mounting hole (21) form the limiting hole section (C); and / or The second mounting hole (21) comprises a second extending section (211) and a second limiting section (212); the inner diameter of the second limiting section (212) is greater than the inner diameter of the second extending section (211); and the second limiting section (212) is arranged close to the first mounting hole (11) in the thickness direction and together with the first mounting hole (11) forms the limiting hole section (C).

3. The back contact solar cell testing device according to claim 1, characterized in that: The detection assembly (30) comprises a first probe (31), a second probe (32) and a syringe assembly (33); The syringe assembly (33) is clamped in the limiting hole section (C); the first probe (31) and the second probe (32) are movably connected to the axial ends of the syringe assembly (33), respectively; a portion of the first probe (31) extends out of the first mounting hole (11), and a portion of the second probe (32) extends out of the second mounting hole (21).

4. The back contact solar cell testing device according to claim 3, characterized in that: The syringe assembly (33) comprises a barrel (331) and an elastic member (332); The cylinder (331) is clamped in the limiting hole section (C), and the elastic member (332) is arranged in the cylinder (331) with two ends respectively abutting against the first probe (31) and the second probe (32).

5. The back contact solar cell testing device according to any one of claims 1 to 4, characterized in that: The first mounting plate (10) is formed with a plurality of first mounting hole rows (L1) arranged at intervals along a first direction, and each of the first mounting hole rows (L1) includes a plurality of first mounting holes (11) arranged at intervals along a second direction; The second mounting holes (21) and the detection components (30) are both multiple in number, the multiple second mounting holes (21) are arranged in a one-to-one correspondence with the multiple first mounting holes (11), and each detection component (30) is respectively penetrated through a corresponding second mounting hole (21) and a corresponding first mounting hole (11).

6. The back contact solar cell testing device according to claim 5, characterized in that: In two adjacent first mounting hole rows (L1) in the first direction, each first mounting hole (11) in one of the first mounting hole rows (L1) is arranged offset from each first mounting hole (11) in the other of the first mounting hole rows (L1) in the second direction.

7. The back contact solar cell testing device according to claim 5, characterized in that: It also comprises a circuit board (40), which is arranged on a side of the second mounting plate (20) away from the first mounting plate (10) along the thickness direction and is connected to an end of the detection component (30) extending out of the second mounting hole (21).

8. The back contact solar cell testing device according to claim 7, characterized in that: The circuit board (40) is provided with a wiring groove (B), and a circuit is arranged in the wiring groove (B); One end of the detection component (30) extending out of the second mounting hole (21) extends into the wiring groove (B) to be connected to the line.

9. The back contact solar cell testing device according to claim 8, characterized in that: The wiring grooves (B) are multiple in number, and the multiple wiring grooves (B) are arranged at intervals along the first direction; One end of the detection components (30) in the same row extending out of the second mounting hole (21) extends into the same wiring groove (B).

10. The back contact solar cell testing device according to claim 7, characterized in that: The first mounting plate (10) is provided with a first positioning connection hole (12), the second mounting plate (20) is provided with a second positioning connection hole (22) and a third positioning connection hole (23), and the circuit board (40) is provided with a fourth positioning connection hole (41); The first mounting plate (10) is detachably connected to the second mounting plate (20) via the first positioning connection hole (12) and the second positioning connection hole (22); The circuit board (40) is detachably connected to the second mounting plate (20) via the fourth positioning connection hole (41) and the third positioning connection hole (23).

11. A testing system, characterized in that: It comprises a back-contact solar cell and a back-contact solar cell testing device (1000) as claimed in any one of claims 1 to 10, wherein one end of the detection component (30) extending out of the first mounting hole (11) is arranged to contact the grid line of the back-contact solar cell.

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