Solar cell tester

Abstract

The utility model discloses a tester for solar cells, comprising: a first probe row, the first probe row comprising: a first bracket and a plurality of first probes, the plurality of first probes being arranged on the first bracket and spaced apart along the length direction of the first bracket; a second probe row, the second probe row and the first probe row being spaced apart in the thickness direction of the first bracket, the second probe row comprising: a second bracket and a plurality of second probes, the plurality of second probes being arranged on the second bracket and spaced apart along the length direction of the second bracket; wherein the projection of the central axis of the second probe projected on the first bracket along the thickness direction of the first bracket is spaced apart from the central axis of the first probe. Thus, the distance between the first probe and the second probe can be increased, thereby increasing the contact area between the cell and light, and all grid lines on the cell can be made to contact with the first probe or the second probe, thereby ensuring that the current and voltage on the entire cell can be collected.

Description

Technical Field

[0001] The utility model relates to the technical field of solar cell testing, in particular to a solar cell tester. Background Art

[0002] In the prior art, traditional solar cell testers use a method of encrypting probes or setting up double rows of probes to ensure that the probes have more contact points with the cell to collect more current. However, this method has denser probes, and the force required to press the probe row down to draw electricity is greater, which can easily cause the cell to rupture and affect the cell yield. Others use metal strips for contact on the front and double rows of probes with larger probe sizes on the back, but this test device has high installation requirements. The metal strips on the front are in rigid contact with the cell, and the metal strips are subject to greater wear, which has a greater impact on the stability of the test. In addition, the shading area of ​​the metal strips on the front is much larger than that of conventional test probe rows. Utility Model Content

[0003] The utility model aims to solve at least one of the technical problems existing in the prior art. To this end, the utility model proposes a solar cell tester, which can not only avoid interference between a first probe and a second probe, but also increase the distance between the first probe and the second probe, thereby increasing the contact area between the cell and light, and can also make all grid lines on the cell contact with the first probe or the second probe, thereby ensuring that the current and voltage on the entire cell can be collected.

[0004] According to an embodiment of the utility model, a tester for solar cells comprises: a first probe row, the first probe row comprises: a first bracket and a plurality of first probes, the plurality of first probes are arranged on the first bracket and are spaced apart along the length direction of the first bracket; a second probe row, the second probe row and the first probe row are spaced apart in the thickness direction of the first bracket, the second probe row comprises: a second bracket and a plurality of second probes, the plurality of second probes are arranged on the second bracket and are spaced apart along the length direction of the second bracket; wherein a projection of a central axis of the second probe on the first bracket along the thickness direction of the first bracket is spaced apart from the central axis of the first probe.

[0005] Therefore, the solar cell tester can not only avoid interference between the first probe and the second probe, but also increase the distance between the first probe and the second probe, thereby increasing the contact area between the cell and light, and can also make all the grid lines on the cell contact with the first probe or the second probe, thereby ensuring that the current and voltage on the entire cell can be collected.

[0006] According to some embodiments of the present invention, a plurality of first probes are arranged at equal intervals along the length direction of the first bracket, a plurality of second probes are arranged at equal intervals along the length direction of the second bracket, and projections of central axes of the plurality of second probes projected onto the first bracket along the thickness direction of the first bracket are staggered with the central axes of the plurality of first probes.

[0007] According to some embodiments of the present invention, the distance between the projection of the central axis of the second probe on the first bracket along the thickness direction of the first bracket and the central axis of the adjacent first probe in the length direction of the first bracket is d, and d satisfies the relationship: 0.3mm<d<2mm.

[0008] According to some embodiments of the present invention, d satisfies the relationship: 0.5mm≤d≤1mm.

[0009] According to some embodiments of the present invention, the distance from one end of the first bracket in the length direction to the first probe adjacent to the one end is a1, and the distance from the other end of the first bracket in the length direction to the first probe adjacent to the other end is a2, and a1 and a2 satisfy the relationship: a1>a2;

[0010] The distance from one end of the second bracket in the length direction to the second probe adjacent to the one end is a3, and the distance from the other end of the second bracket in the length direction to the second probe adjacent to the other end is a4, and a3 and a4 satisfy the relationship: a3<a4.

[0011] According to some embodiments of the present invention, a1, a2, a3 and a4 satisfy the relationship: a1=a4, a2=a3.

[0012] According to some embodiments of the present invention, any one of the first probe and the second probe includes: a needle body connected to the corresponding first bracket or the second bracket; and a needle head connected to the needle body, and the cross-section of the needle head is non-circular.

[0013] According to some embodiments of the present invention, the cross-section of the needle is one of a rectangle, an ellipse and a diamond.

[0014] According to some embodiments of the present invention, the cross-section of the needle tip is a rectangle, the length of the rectangle is L1 and the width is L2, satisfying the relationship: 2mm≤L1≤2.5mm, 1.5mm≤L2≤2.5mm.

[0015] According to some embodiments of the present invention, at least one of the first probe and the second probe is a metal probe.

[0016] Additional aspects and advantages of the present invention will be given in part in the following description, and in part will become apparent from the following description, or will be learned through the practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The above and / or additional aspects and advantages of the present invention will become apparent and easily understood from the description of the embodiments in conjunction with the following drawings, in which:

[0018] Figure 1 is a structural schematic diagram of a solar cell tester according to an embodiment of the utility model;

[0019] Figure 2 is a schematic structural diagram of a first probe row according to an embodiment of the utility model;

[0020] Figure 3 is a schematic structural diagram of a second probe row according to an embodiment of the utility model;

[0021] Figure 4 It is a partial schematic diagram of the distribution of the first probe row and the second probe row on the battery cell according to an embodiment of the utility model;

[0022] Figure 5 It is a schematic structural diagram of a first probe according to an embodiment of the utility model.

[0023] Reference numerals:

[0024] 100. Solar cell tester;

[0025] 10. first probe row; 11. first probe; 111. needle head; 112. needle body;

[0026] 12. The first bracket;

[0027] 20. second probe row; 21. second probe; 22. second bracket;

[0028] 31. Gate line; 32. Battery cell. DETAILED DESCRIPTION

[0029] The embodiments of the present utility model are described in detail below. The embodiments described with reference to the accompanying drawings are exemplary. The embodiments of the present utility model are described in detail below.

[0030] Reference below Figure 1-Figure 5 A solar cell tester 100 according to an embodiment of the present invention is described.

[0031] Reference Figure 4As shown, the solar cell tester 100 of the embodiment of the utility model comprises: a first probe row 10 and a second probe row 20, the first probe row 10 comprises: a first bracket 12 and a plurality of first probes 11, the plurality of first probes 11 are arranged on the first bracket 12, and the plurality of first probes 11 are arranged at intervals along the length direction of the first bracket 12, the second probe row 20 and the first probe row 10 are arranged at intervals in the thickness direction of the first bracket 12, the second probe row 20 comprises: a second bracket 22 and a plurality of second probes 21, the plurality of second probes 21 are arranged on the second bracket 22, and the plurality of second probes 21 are arranged at intervals along the length direction of the second bracket 22. Among them, the projection of the central axis of the second probe 21 on the first bracket 12 along the thickness direction of the first bracket 12 is arranged at intervals from the central axis of the first probe 11.

[0032] Specifically, traditional solar cell testers use a method of encrypting probes or setting up double rows of probes to ensure that the probes have more contact points with the cells to collect more current. However, this method requires denser probes, and more force is required when the probe row is pressed down to draw electricity, which can easily cause the cell to rupture, thereby affecting the cell yield. Others use metal strips for contact on the front and double rows of probes with larger probe sizes on the back, but this test device has high installation requirements. The metal strips on the front are in rigid contact with the cells, and the metal strips are subject to greater wear, which has a greater impact on the stability of the test. In addition, the shading area of ​​the metal strips on the front is much larger than that of conventional test probe rows.

[0033] Therefore, it is necessary to optimize the design of the solar cell tester 100. The first probe row 10 is mainly composed of a first bracket 12 and a plurality of first probes 11. The first bracket 12 can provide an installation position for the first probes 11 and can also facilitate the replacement and removal of the first probes 11. The plurality of first probes 11 are arranged at intervals along the length direction of the first bracket 12, which can not only avoid interference between the plurality of first probes 11, but also reduce light blocking.

[0034] Also, if Figure 4 As shown, the second probe row 20 and the first probe row 10 are spaced apart in the thickness direction of the first bracket 12, that is, the left-right direction. This can avoid the second probe row 20 and the first probe row 10 being densely distributed, thereby increasing the area of ​​the battery cell 32 exposed to light.

[0035] Furthermore, the second probe row 20 is mainly composed of a second bracket 22 and a plurality of second probes 21. Similarly, the plurality of second probes 21 are spaced apart along the length direction of the second bracket 22, which can not only avoid interference between the plurality of second probes 21, but also reduce light shielding. In addition, the first probe row 10 and the second probe row 20 are independent of each other, which can avoid mutual influence between them and facilitate replacement and installation.

[0036] Among them, the projection of the central axis of the second probe 21 on the first bracket 12 along the thickness direction of the first bracket 12 is arranged at an interval from the central axis of the first probe 11. In this way, not only can the interference between the first probe 11 and the second probe 21 be avoided, but also the distance between the first probe 11 and the second probe 21 can be increased, thereby increasing the contact area between the battery cell 32 and the light, and all the gate lines 31 on the battery cell 32 can be made to contact with the first probe 11 or the second probe 21, thereby ensuring that the current and voltage on the entire battery cell 32 can be collected.

[0037] When the metal strips on the front and back sides of the unshielded battery cell 32 are eliminated, the first probe row 10 and the second probe row 20 can be set on the front and back sides of the unshielded battery cell 32, which can further increase the contact area between the battery cell 32 and light, thereby improving the power generation efficiency of the battery cell 32.

[0038] Therefore, the solar cell tester 100 can not only avoid interference between the first probe 11 and the second probe 21, but also increase the distance between the first probe 11 and the second probe 21, thereby increasing the contact area between the cell 32 and light, and can also make all the grid lines 31 on the cell 32 contact with the first probe 11 or the second probe 21, thereby ensuring that the current and voltage on the entire cell 32 can be collected.

[0039] The solar cell tester 100 is applicable not only to the testing and sorting of solar cells without busbars, but also to the testing and sorting of solar cells with busbars, and has a wide application range.

[0040] According to some embodiments of the present invention, Figure 4 As shown, multiple first probes 11 are arranged at equal intervals along the length direction of the first bracket 12, and multiple second probes 21 are arranged at equal intervals along the length direction of the second bracket 22. The projections of the central axes of the multiple second probes 21 on the first bracket 12 along the thickness direction of the first bracket 12 are staggered with the central axes of the multiple first probes 11.

[0041] Among them, multiple first probes 11 are arranged at equal intervals along the length direction of the first bracket 12, which can make the first probes 11 more evenly distributed on the battery cell 32, and can also avoid the multiple first probes 11 being densely distributed in a local area on the battery cell 32, affecting the area receiving light.

[0042] Similarly, multiple second probes 21 are arranged at equal intervals along the length direction of the second bracket 22, so that the second probes 21 are distributed more evenly on the battery cell 32, and the multiple second probes 21 are not densely distributed in a local area on the battery cell 32, which affects the area receiving light.

[0043] Moreover, the projections of the central axes of the multiple second probes 21 projected onto the first bracket 12 along the thickness direction of the first bracket 12 are staggered with the central axes of the multiple first probes 11, which not only increases the distance between the first probes 11 and the second probes 21, but also allows all the grid lines 31 on the battery cell 32 to contact the first probes 11 or the second probes 21, thereby ensuring that the current and voltage on the entire battery cell 32 can be collected.

[0044] According to some embodiments of the present invention, Figure 4 As shown, the distance between the projection of the central axis of the second probe 21 on the first bracket 12 along the thickness direction of the first bracket 12 and the central axis of the adjacent first probe 11 in the length direction of the first bracket 12 is d, and d satisfies the relationship: 0.3mm<d<2mm.

[0045] In this way, the multiple first probes 11 and the multiple second probes 21 are staggered in the length direction of the first bracket 12, so that the multiple first probes 11 and the multiple second probes 21 can respectively contact different grid lines 31 on the battery cell 32, so that all grid lines 31 of the battery cell 32 can contact the first probes 11 and the second probes 21.

[0046] In addition, since the distances between the gate lines 31 on different battery cells 32 are different, the distance d between the projection of the central axis of the second probe 21 on the first bracket 12 along the thickness direction of the first bracket 12 and the central axis of the adjacent first probe 11 in the length direction of the first bracket 12 is set in the range of 0.3 mm to 2 mm, thereby ensuring that the gate line 31 contacted by the second probe 21 and its projection on the first bracket 12 and the gate line 31 contacted by the adjacent first probe 11 are all within the measurement range.

[0047] According to some embodiments of the present invention, d satisfies the relationship: 0.5mm≤d≤1mm.

[0048] Among them, the distance d between the projection of the central axis of the second probe 21 on the first bracket 12 along the thickness direction of the first bracket 12 and the central axis of the adjacent first probe 11 in the length direction of the first bracket 12 can be set to 0.6 mm, 0.8 mm and 1 mm, so that the first probe 11 or the second probe 21 can be fully in contact with the gate line 31.

[0049] According to some embodiments of the present invention, Figure 4 As shown, the distance from one end of the first bracket 12 in the length direction to the first probe 11 adjacent to the one end is a1, the distance from the other end of the first bracket 12 in the length direction to the first probe 11 adjacent to the other end is a2, a1 and a2 satisfy the relationship: a1>a2, the distance from one end of the second bracket 22 in the length direction to the second probe 21 adjacent to the one end is a3, the distance from the other end of the second bracket 22 in the length direction to the second probe 21 adjacent to the other end is a4, a3 and a4 satisfy the relationship: a3<a4.

[0050] Among them, the distance a1 from one end of the first bracket 12 in the length direction to the first probe 11 adjacent to the one end is greater than the distance a2 from the other end of the first bracket 12 in the length direction to the first probe 11 adjacent to the other end. In this way, multiple first probes 11 can be offset relative to the length direction of the first bracket 12.

[0051] The distance a3 from one end of the second bracket 22 in the length direction to the second probe 21 adjacent to the one end is smaller than the distance a4 from the other end of the second bracket 22 in the length direction to the second probe 21 adjacent to the other end. In this way, not only can the multiple second probes 21 be offset relative to the length direction of the second bracket 22, but also the first probe 11 and the second probe 21 can be misaligned in the length direction of the first bracket 12 or the length direction of the second bracket 22.

[0052] According to some embodiments of the present invention, Figure 4 As shown, a1, a2, a3 and a4 satisfy the relationship: a1=a4, a2=a3.

[0053] Among them, the distance a1 from one end of the first bracket 12 in the length direction to the first probe 11 adjacent to the one end is equal to the distance a4 from the other end of the second bracket 22 in the length direction to the second probe 21 adjacent to the other end, and the distance a2 from the other end of the first bracket 12 in the length direction to the first probe 11 adjacent to the other end is equal to the distance a3 from one end of the second bracket 22 in the length direction to the second probe 21 adjacent to the one end. In this way, the first probe row 10 and the second probe row 20 only have different installation orientations. The first probe row 10 is rotated 180° during the installation process to become the second probe row 20.

[0054] In this way, only one type of the first probe row 10 or the second probe row 20 needs to be manufactured, which can not only measure different types of battery cells 32 , but also improve installation efficiency and facilitate replacement, thereby reducing costs.

[0055] According to some embodiments of the present invention, Figure 5As shown, any one of the first probe 11 and the second probe 21 includes: a needle body 112 and a needle head 111, the needle body 112 is connected to the corresponding first bracket 12 or second bracket 22, the needle head 111 is connected to the needle body 112, and the cross section of the needle head 111 is non-circular.

[0056] Among them, the first probe 11 and the second probe 21 are both composed of a needle body 112 and a needle head 111, and the needle body 112 is connected to the corresponding first bracket 12 or the second bracket 22, so that the needle body 112 of the first probe 11 can be easily installed in the first bracket 12, and the needle body 112 of the second probe 21 can be easily installed in the second bracket 22, and the first probe 11 or the second probe 21 can be easily replaced.

[0057] In addition, the cross section of the needle 111 is non-circular, so that the contact area between the needle 111 and the gate line 31 can be increased, thereby ensuring that the current and voltage on the entire battery cell 32 can be fully collected.

[0058] According to some embodiments of the present invention, the cross section of the needle 111 is one of a rectangle, an ellipse and a diamond.

[0059] The cross section of the needle 111 can be set to a rectangle, an ellipse, or a rhombus. During the measurement process, the needle 111 of the first probe 11 in the first probe row 10 can be a combination of a rectangle and an ellipse, or a combination of a rectangle and a rhombus. The needles 111 of the first probe 11 can also be rectangular or elliptical. It has good adaptability.

[0060] According to a specific embodiment of the present invention, the cross section of the needle 111 is a rectangle, the length of the rectangle is L1, and the width is L2, satisfying the relationship: 2mm≤L1≤2.5mm, 1.5mm≤L2≤2.5mm.

[0061] The rectangular length of the needle 111 can be set to 2 mm or 2.5 mm, and the rectangular width of the needle 111 can be set to 1.5 mm or 2.5 mm, which can be determined according to the spacing between the battery cell 32 and the gate line 31, thereby ensuring that the needle 111 is in full contact with the gate line 31.

[0062] According to some embodiments of the present invention, at least one of the first probe 11 and the second probe 21 is a metal probe.

[0063] The metal probe has good electrical conductivity and can transmit current and measure voltage more accurately, which is conducive to accurately measuring the voltage and current values ​​of the battery cell 32.

[0064] According to another embodiment of the utility model, the first probe row 10 and the second probe row 20 can be arranged on one side of the battery cell 32, and the third probe row is arranged on the other side of the battery cell 32. The third probes in the third probe row are arranged on a third bracket, and multiple third probes are symmetrically arranged on the third bracket, thereby further ensuring that the current and voltage on the entire battery cell 32 can be collected.

[0065] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0066] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "illustrative embodiments", "examples", "specific examples", or "some examples" 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 utility model. In this specification, the schematic expressions of the above terms do not necessarily refer to the same embodiment or example.

[0067] Although the embodiments of the present invention have been shown and described, those skilled in the art will appreciate that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the claims and their equivalents.

Claims

1. A solar cell tester, characterized in that: include: A first probe row, the first probe row comprising: a first bracket and a plurality of first probes, the plurality of first probes being arranged on the first bracket and spaced apart along a length direction of the first bracket; A second probe row, the second probe row and the first probe row are spaced apart in the thickness direction of the first bracket, the second probe row comprises: a second bracket and a plurality of second probes, the plurality of second probes are arranged on the second bracket and spaced apart along the length direction of the second bracket; Wherein, a projection of a central axis of the second probe projected onto the first bracket along a thickness direction of the first bracket is spaced apart from the central axis of the first probe.

2. The solar cell tester according to claim 1, characterized in that: A plurality of first probes are arranged at equal intervals along the length direction of the first bracket, a plurality of second probes are arranged at equal intervals along the length direction of the second bracket, and projections of central axes of the plurality of second probes projected onto the first bracket along the thickness direction of the first bracket are staggered with the central axes of the plurality of first probes.

3. The solar cell tester according to claim 2, characterized in that: The distance between the projection of the central axis of the second probe on the first bracket along the thickness direction of the first bracket and the central axis of the adjacent first probe in the length direction of the first bracket is d, and d satisfies the relationship: 0.3mm<d<2mm.

4. The solar cell tester according to claim 3, characterized in that: d satisfies the relationship: 0.5mm≤d≤1mm.

5. The solar cell tester according to claim 1, characterized in that: A distance from one end of the first bracket in the length direction to the first probe adjacent to the one end is a1, and a distance from the other end of the first bracket in the length direction to the first probe adjacent to the other end is a2, and a1 and a2 satisfy the relationship: a1>a2; The distance from one end of the second bracket in the length direction to the second probe adjacent to the one end is a3, and the distance from the other end of the second bracket in the length direction to the second probe adjacent to the other end is a4, and a3 and a4 satisfy the relationship: a3<a4.

6. The solar cell tester according to claim 5, characterized in that: a1, a2, a3 and a4 satisfy the relationship: a1=a4, a2=a3.

7. The solar cell tester according to claim 1, characterized in that: Any one of the first probe and the second probe comprises: a needle body, the needle body being connected to the corresponding first bracket or the second bracket; A needle head is connected to the needle body, and the cross section of the needle head is non-circular.

8. The solar cell tester according to claim 7, characterized in that: The cross section of the needle is one of a rectangle, an ellipse and a diamond.

9. The solar cell tester according to claim 7, characterized in that: The cross section of the needle tip is a rectangle, the length of the rectangle is L1 and the width is L2, and the relationship is satisfied: 2mm≤L1≤2.5mm, 1.5mm≤L2≤2.5mm.

10. The solar cell tester according to claim 1, characterized in that: At least one of the first probe and the second probe is a metal probe.

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