Apparatus for contacting wire, apparatus and method for examining photovoltaic module

Abstract

A tangential device, a solar cell module inspection device, and a solar cell module inspection method are disclosed. The disclosed tangential device comprises: a terminal body made of a conductive material and movable between a contact position in contact with a wire and a separation position separated from the wire; and an actuator that provides power to move the terminal body between the contact position and the separation position.

Description

Technology Field

[0001] The present invention relates to a tangential device for inspecting a solar cell module, a solar cell module inspection device, and a solar cell module inspection method. Background Technology

[0003] A solar cell module includes a plurality of solar cells arranged to conduct electricity. A process for manufacturing a solar cell module may include the steps of manufacturing a string in which a plurality of solar cells are arranged in a row, arranging the plurality of strings according to the planar shape of the solar cell module, joining cross connectors to wires at both ends of the plurality of strings, and applying power to the cross connectors and inspecting the plurality of strings.

[0004] When a defect is found in a specific string during the inspection of multiple strings, a worker must manually disassemble the connection between the cross connector and the wire and replace the defective string with a new string. Consequently, it is difficult to automate the manufacturing of solar cell modules, and the productivity of solar cell module manufacturing may decrease. The problem to be solved

[0006] The present invention aims to provide a tangent device capable of inspecting a defective string without joining a cross connector to a wire, a solar cell module inspection device, and a solar cell module inspection method. means of solving the problem

[0008] The tangential device of the present invention comprises: a terminal body made of a conductive material and movable between a contact position and a separation position; and an actuator that provides power to move the terminal body between the contact position and the separation position.

[0009] The tangential device of the present invention may further include a support made of an insulating material, surrounding the terminal body, and moving the terminal body between the contact position and the separation position by the operation of the actuator.

[0010] The terminal body may include a plurality of contact pins penetrating the support body; and a terminal plate electrically connected to a power supply device and connected to each of the plurality of contact pins.

[0011] Each of the above contact pins may include: a pin portion penetrating a through hole of the support; and a hammer portion connected to the pin portion and protruding to the outside of the support.

[0012] A longitudinal groove is formed in the support member, and a plurality of the contact pins can be arranged in a row on the longitudinal groove.

[0013] The terminal body may further include a coupling ring having an outer diameter larger than the inner diameter of the through hole, which is mounted on the pin portion between the support and the terminal plate.

[0014] The tangential device of the present invention may further include an elastic member disposed on the pin portion between the support and the hammer portion, and elastically deformed when the hammer portion moves relative to the support.

[0015] The above elastic member wraps around the pin portion, and one side may be supported by the support body and the opposite side may be supported by the hammer portion.

[0016] The terminal body may further include a fixing screw that penetrates the terminal plate and is fastened to the pin portion to combine the terminal plate with a plurality of the pin portions.

[0017] The tangential device of the present invention may further include a terminal connecting screw that is fastened to the pin portion by pressing the terminal of the power supply device against the terminal plate so that the power supply device and the terminal plate are electrically connected.

[0018] The tangential device of the present invention may further include a base coupled to the actuator; and a spacer interposed between the base and the support so as to separate the base and the support.

[0019] The actuator may include a cylinder body; and a cylinder rod coupled to the base and advancing in a direction protruding from the cylinder body and a direction inserted into the cylinder body.

[0020] The solar cell module inspection device of the present invention comprises: a stage that supports a plurality of solar cell strings arranged in a first direction; a tangential device that selectively contacts a plurality of solar cell strings so that the plurality of solar cell strings are energized; and an electroluminescence inspector that detects electroluminescence (EL) of a plurality of solar cell strings while the tangential device is in contact with the plurality of solar cell strings and inspects whether the plurality of solar cell strings are defective.

[0021] The solar cell string extends in a second direction, and the solar cell string may include a tangential wire provided at the end of the solar cell string in the second direction and capable of making contact with the tangential device.

[0022] The above-described tangential device may include: a terminal body made of a conductive material and movable between a contact position in contact with the tangential wire and a separation position separated from the tangential wire; and an actuator that provides power to move the terminal body between the contact position and the separation position.

[0023] The above tangential device may further include a support made of an insulating material, surrounding the terminal body, and moving the terminal body between the contact position and the separation position by the operation of the actuator.

[0024] The above terminal body can move between the contact position and the separation position along a third direction orthogonal to the first direction and the second direction.

[0025] The above tangent device is provided in a plurality of units, and at least one of the plurality of tangent devices can directly connect a pair of solar cell strings arranged adjacently in the first direction among the plurality of solar cell strings.

[0026] The solar cell module inspection device of the present invention may further include: a first support beam extending in the first direction and having the tangent device installed thereon; and a second support beam extending in the second direction and having the first support beam installed so as to be movable in the second direction.

[0027] The solar cell module inspection method of the present invention comprises: a solar cell string arrangement step of arranging a plurality of solar cell strings in a first direction; a tangential device contact step of contacting a plurality of solar cell strings with a tangential device so that the plurality of solar cell strings are energized; an electroluminescence inspection step of detecting electroluminescence of the plurality of solar cell strings while the tangential device is in contact with the plurality of solar cell strings and inspecting whether the plurality of solar cell strings are defective; and a tangential device separation step of separating the tangential device from the plurality of solar cell strings.

[0028] The solar cell module inspection method of the present invention may further include a string replacement step in which, if at least some of the plurality of solar cell strings are determined to be defective in the electroluminescence inspection step, the defective solar cell string is replaced with another solar cell string of the same type after the tangent device separation step. Brief explanation of the drawing

[0030] FIG. 1 is a perspective view of a solar cell module inspection device according to a first embodiment of the present invention. FIG. 2 is a bottom perspective view of a solar cell module inspection device according to a first embodiment of the present invention. FIG. 3 is a plan view of a solar cell module inspection device according to a first embodiment of the present invention. FIG. 4 is a plan view showing a plurality of solar cell strings that are inspected for defects by the solar cell module inspection device of FIG. 1 to 3. FIG. 5 is a plan view showing one solar cell string extracted from among the plurality of solar cell strings shown in FIG. 4. FIG. 6 is a plan view showing one solar cell extracted from among a plurality of solar cells included in a single solar cell string shown in FIG. 5. FIG. 7 is a perspective view of a tangent device according to one embodiment of the present invention. FIG. 8 is a bottom perspective view of a tangent device according to one embodiment of the present invention. FIG. 9 is a side view of a tangent device according to one embodiment of the present invention. FIG. 10 is a cross-sectional view of the tangent device of FIG. 9 cut along XX. FIG. 11 is a block diagram showing a solar cell module inspection method according to one embodiment of the present invention. FIG. 12 is a schematic plan view of a solar cell module inspection device according to a second embodiment of the present invention. FIG. 13 is a schematic plan view of a solar cell module inspection device according to a third embodiment of the present invention. FIG. 14 is a schematic plan view of a solar cell module inspection device according to the fourth embodiment of the present invention. Specific details for implementing the invention

[0031] Hereinafter, a tangent device, a solar cell module inspection device, and a solar cell module inspection method according to the present invention will be described with reference to the attached drawings. In this process, the thickness of lines or the size of components shown in the drawings may be exaggerated for clarity and convenience of explanation. Furthermore, the terms described below are defined considering their functions in the present invention, and these may vary depending on the intention or convention of the user or operator. Therefore, the definitions of these terms should be based on the content throughout this specification.

[0032] Furthermore, in this specification, when a part is described as being "connected (or joined)" to another part, this includes not only cases where they are "directly connected (or joined)" but also cases where they are "indirectly connected (or joined)" with other members interposed between them. In this specification, when a part is described as "including (or having) a certain component," this means that, unless specifically stated otherwise, it does not exclude other components but may additionally "include (or have)" other components.

[0033] Additionally, a “unit,” “module,” or “part” for a component as used herein performs at least one function or operation. Furthermore, a “unit,” “module,” or “part” may perform a function or operation by hardware, software, or a combination of hardware and software. Additionally, a plurality of “units,” a plurality of “modules,” or a plurality of “parts,” excluding a “unit,” “module,” or “part” that must be performed on specific hardware or on at least one processor, may be integrated into at least one module. A singular expression includes a plural expression unless the context clearly indicates otherwise.

[0034] Furthermore, throughout this specification, the same reference numerals may refer to the same components. Even if the same or similar reference numerals are not mentioned or described in a specific drawing, they may be described based on other drawings. Additionally, even if a part is not indicated by a reference numeral in a specific drawing, that part may be described based on other drawings. Furthermore, the number, shape, size, and relative differences in size of the detailed components included in the drawings of this application are set for ease of understanding and do not limit the embodiments, and may be implemented in various forms.

[0035] FIG. 1 is a perspective view of a solar cell module inspection device according to a first embodiment of the present invention, FIG. 2 is a bottom perspective view of a solar cell module inspection device according to a first embodiment of the present invention, FIG. 3 is a plan view of a solar cell module inspection device according to a first embodiment of the present invention, FIG. 4 is a plan view showing a plurality of solar cell strings whose defects are inspected by the solar cell module inspection device of FIG. 1 to FIG. 3, FIG. 5 is a plan view showing one solar cell string extracted from among the plurality of solar cell strings shown in FIG. 4, and FIG. 6 is a plan view showing one solar cell extracted from among the plurality of solar cell cells included in one solar cell string shown in FIG. 5.

[0036] Referring to FIGS. 1 to 6, a solar cell inspection device (100) according to the first embodiment of the present invention includes a stage (101), a plurality of tangent devices (130A, 130B), and an electroluminescent inspection device (120).

[0037] The stage (101) can support a plurality of solar cell strings (10) included in a single solar cell module. The stage (101) may include a transparent plate capable of projecting light. The stage (101) can support a plurality of solar cell strings (10) so that the transparent plate and the plurality of solar cell strings (10) overlap.

[0038] A plurality of solar cell strings (10) included in a single solar cell module can be arranged to form a matrix (20). The matrix (20) composed of a plurality of solar cell strings (10) may have a plurality of columns in a first direction as shown in FIG. 4, and may have a plurality of rows in a second direction intersecting the first direction.

[0039] For example, a plurality of solar cell strings (10) may be arranged in a matrix of 2 rows (i, ii) × 6 columns (A, B, C, D, E, F). The first direction and the second direction may be orthogonal to each other in a horizontal direction. Meanwhile, in FIG. 4, a matrix (20) of solar cell strings (10) having 2 rows and 6 columns is supported on the stage (101), but alternatively, a matrix of solar cell strings having one row and multiple columns, or one row and one column, or multiple rows and one column may be supported on the stage.

[0040] Each solar cell string (10) may be extended in a second direction. The longitudinal end of the solar cell string (10), i.e., the end in the second direction, may include a plurality of tangential wires (15) that are in contact with tangential devices (130A, 130B) to allow current to pass through them.

[0041] Each solar cell string (10) may include a plurality of solar cell cells (1) arranged in a line in a second direction. A solar cell (1) may include a flat cell body (2) and a plurality of cell wires (5). The cell body (2) can convert light energy into electrical energy by the photoelectric effect. The plurality of cell wires (5) may be connected to other solar cell cells (1) or terminals (not shown) of a connector so that the cell body (2) is energized.

[0042] A plurality of cell wires (5) may be spaced apart from each other and extended parallel to the second direction. Each cell wire (5) may include an overlapping portion (6) that overlaps with the cell body (2) and a protruding end (7) that protrudes outward from the cell body (2) across the outer edge of the cell body (2).

[0043] In the embodiments illustrated in FIGS. 1 to 6, the tangential wire (15) of the solar cell string (10) may be a protruding end (7) of a cell wire (5) included in a solar cell (1) that is positioned at the end along a second direction among a plurality of solar cell cells (1) constituting a single solar cell string (10).

[0044] The solar cell (1) may be a half cell comprising a cell body (2) having a planar shape that is approximately rectangular. The cell body (2) of the half cell may have a length (SL1) of one side edge that is orthogonal to it and a length (SL2) of the other side edge that is orthogonal to it. However, the half cell is merely an example of a solar cell, and unlike that shown in FIGS. 1 to 6, a general cell having a cell body with a planar shape that is approximately square may be included in the solar cell string.

[0045] Adjacent solar cell cells (1) belonging to a solar cell string (10) can be connected in series so as to be electrically conductive by soldering the protruding ends (7) of cell wires (5) that protrude outward from the cell body (2). In FIG. 5, reference numeral '12' indicates a soldered joint formed by soldering the opposing protruding ends (7) of cell wires (5) together.

[0046] Among the plurality of solar cell strings (10) constituting the matrix (20), the 6 solar cell strings (10_iA, 10_iB, 10_iC, 10_iD, 10_iE, 10_iF) belonging to the first row and the 6 solar cell strings (10_iiA, 10_iiB, 10_iiC, 10_iiD, 10_iiE, 10_iiF) belonging to the second row, the tangential wires (15) facing each other may be slightly separated without contact.

[0047] A plurality of tangent devices (130A, 130B) are spaced apart from a plurality of solar cell strings (10) so that a plurality of solar cell strings (10) forming a matrix (20) are energized. One type of tangent device (130A) (hereinafter referred to as the "first tangent device") among the plurality of tangent devices (130A, 130B) can be energized to a plurality of tangent wires (15) provided at the end of a single solar cell string (10).

[0048] Among the plurality of tangent devices (130A, 130B), another type of tangent device (130B) (hereinafter referred to as the ‘second tangent device’) can simultaneously come into contact with and simultaneously separate from a plurality of tangent wires (15) provided at the ends of a pair of solar cell strings (10) arranged adjacently in the first direction. Accordingly, the second tangent device (130B) can directly connect the pair of solar cell strings (10) arranged adjacently in the first direction so as to allow for electrical conduction.

[0049] For example, the solar cell module inspection device (100) illustrated in FIGS. 1 to 3 may include a pair of first tangent devices (130A) and eight second tangent devices (130B). One of the pair of first tangent devices (130A) may be positioned to be aligned along a third direction with a tangent wire (15) between a solar cell string (10_iA) in row 1 and column 1 and a solar cell string (10_iiA) in row 2 and column 1, and the other may be positioned to be aligned along a third direction with a tangent wire (15) between a solar cell string (10_iF) in row 1 and column 6 and a solar cell string (10_iiF) in row 2 and column 6. The third direction may be defined as a direction orthogonal to the first direction and the second direction.

[0050] Two of the eight second tangent devices (130B) can be arranged in a line along the first direction so as to be aligned along the third direction with the tangent wire (15) between a pair of first tangent devices (130A).

[0051] Three of the eight second tangent devices (130B) can be arranged in a line along the first direction so as to be aligned along the third direction with the tangent wire (15) that does not face the six solar cell strings (10_iiA, 10_iiB, 10_iiC, 10_iiD, 10_iiE, 10_iiF) in the second row among the tangent wires (15) of the six solar cell strings (10_iA, 10_iB, 10_iiC, 10_iiD, 10_iiE, 10_iiF) in the first row.

[0052] The remaining three of the eight second tangent devices (130B) can be arranged in a line along the first direction so as to be aligned along the third direction with the tangent wire (15) that does not face the six solar cell strings (10_iA, 10_iB, 10_iC, 10_iD, 10_iE, 10_iF) in the first row among the tangent wires (15) of the six solar cell strings (10_iA, 10_iB, 10_iC, 10_iD, 10_iE, 10_iF) in the second row.

[0053] The solar cell module inspection device (100) may further include a power supply device (115) for supplying power to a plurality of solar cell strings (10) arranged in a matrix (20). The positive terminal of the power supply device (115) may be electrically connected to one of a pair of first tangent devices (130A), and the negative terminal may be electrically connected to the other of a pair of first tangent devices (130A).

[0054] When the positive terminal and negative terminal of a power supply device (115) are electrically connected to a pair of first tangent devices (130A), and all tangent devices (130A, 130B) are in contact with all tangent wires (15) of a plurality of solar cell strings (10), and power is supplied from the power supply device (115), current can flow along the cell wires (5) of the plurality of solar cell strings (10) forming a matrix (20).

[0055] Specifically, for example, current may flow into one of the first tangent devices (130A) of a pair of first tangent devices (130A), flow along a plurality of series-connected solar cells (1) belonging to one row, and flow out to another first tangent device (130A). Additionally, current may flow into one of the first tangent devices (130A) of a pair of first tangent devices (130A), flow along a series-connected solar cell (1) belonging to two rows, and flow out to another first tangent device (130A).

[0056] The solar cell module inspection device (100) may further include a plurality of first support beams (105) and a plurality of second support beams (110). The plurality of first support beams (105) may be extended in a first direction spaced apart from each other. Each first support beam (105) may support a plurality of tangential devices (130A, 130B).

[0057] A solar cell module inspection device (100) according to the embodiment illustrated in FIGS. 1 to 3 includes three first support beams (105), and one of the first support beams (105) can support a pair of first tangent devices (130A) and a pair of second tangent devices (130B). The other two first support beams (105) can each support three second tangent devices (130B).

[0058] A plurality of second support beams (110) can support a plurality of first support beams (105) so as to be movable along a second direction. A plurality of second support beams (110) may be provided as a pair. A pair of second support beams (110) may support both ends in the longitudinal direction of the first support beam (105) and extend in the second direction. Although not shown in the drawing, the solar cell module inspection device (100) may further include a first support beam actuator that provides power to move the first support beam (105) along the longitudinal direction of the second support beam (110).

[0059] The electroluminescence tester (120) can detect the electroluminescence (EL) of the plurality of solar cell strings (10) while the plurality of tangential devices (130A, 130B) are in contact with the plurality of solar cell strings (10) forming a matrix (20), and can inspect whether the plurality of solar cell strings (10) are defective.

[0060] As described above, when the positive terminal and negative terminal of the power supply device (115) are electrically connected to a pair of first tangent devices (130A) and all tangent devices (130A, 130B) are in contact with all tangent wires (15) of a plurality of solar cell strings (10) and power is supplied from the power supply device (115), current can flow along the cell wires (5) of the plurality of solar cell strings (10) forming a matrix (20), and at this time, an electroluminescence inspection can be performed by an electroluminescence inspection device (120).

[0061] The electroluminescence inspection device (120) may include a camera (121), such as a CCD camera, for example, and a defect detector (123) that detects a solar cell string (10) in which electroluminescence does not appear or is less than a preset standard from an image captured by the camera (121) and determines it as a defective solar cell string (10).

[0062] The defect detector (123) may include a computer installed with software that performs the function of finding defective solar cell strings (10) from captured images. Meanwhile, the electroluminescent inspection device (120) may not include the defect detector (123). In this case, an operator may observe the image captured by the camera (121) and find defective solar cell strings (10).

[0063] A plurality of tangent devices (130A, 130B) and a camera (121) may be positioned on opposite sides with a plurality of solar cell strings (10) arranged in a matrix (20) in between. In an embodiment of the solar cell module inspection device (100) illustrated in FIGS. 1 to 3, a plurality of tangent devices (130A, 130B) and a camera (121) may be positioned on one side and the other side along a third direction orthogonal to a first direction and a second direction with a plurality of solar cell strings (10) in between. For example, the third direction may be an up-down direction.

[0064] With this configuration, the camera (121) can capture images of multiple solar cell strings (10) that are not obscured by the first support beam (105), the second support beam (110), and the tangent devices (130A, 130B). Therefore, defective solar cell strings (10) can be identified more accurately.

[0065] FIG. 7 is a perspective view of a tangent device according to an embodiment of the present invention, FIG. 8 is a bottom perspective view of a tangent device according to an embodiment of the present invention, FIG. 9 is a side view of a tangent device according to an embodiment of the present invention, and FIG. 10 is a cross-sectional view of the tangent device of FIG. 9 cut along XX. The tangent device (130A) shown in FIG. 7 to FIG. 10 is the first tangent device of FIG. 1.

[0066] Referring to FIGS. 1, 4, 7 through 10, the first tangent device (130A) may include a connecting arm (131), an actuator (133), a support body (145), a terminal body (150), and an elastic member (175). One end of the connecting arm (131) is fixedly supported on the first support beam (105) and may extend toward the stage (101).

[0067] The terminal body (150) is made of a conductive material, such as metal, for example, and is movable between a contact position that contacts a plurality of tangent wires (15) and a separation position that is separated from the tangent wires (15). The tangent device (130A) of the embodiment illustrated in FIG. 1 can move between the contact position and the separation position along a third direction. To elaborate, if the terminal body (150) moves in a direction that approaches the stage (101) along the third direction, it moves closer to the contact position, and if the terminal body (150) moves in a direction that moves away from the stage (101) along the third direction, it moves to the separation position.

[0068] The actuator (133) can provide power to move the terminal body (150) between a contact position and a separation position. The actuator (133) may include a hydraulic cylinder that moves the terminal body (150) along a third direction by hydraulic pressure.

[0069] The actuator (133) may include a cylinder body (134) that includes a piston (not shown) inside and is fixedly supported at the other end of a connecting arm (131), and a cylinder rod (138) that has one end extended to the piston and the other end extended downward from the cylinder body (134).

[0070] A cylinder body (134) may be equipped with first and second hydraulic supply tubes (136, 137) through which hydraulic fluid is injected from the outside of the cylinder body (134) into the inside or discharged from the inside to the outside. When hydraulic fluid is injected into the cylinder body (134) through the first hydraulic supply tube (136) and hydraulic fluid is discharged from the cylinder body (134) to the outside through the second hydraulic supply tube (137) which is positioned below the second hydraulic supply tube (136), the piston inside the cylinder body (134) and the cylinder rod (138) connected thereto can move downward.

[0071] Conversely, when hydraulic fluid is injected into the cylinder body (134) through the second hydraulic supply tube (137) and hydraulic fluid is discharged from the cylinder body (134) to the outside through the first hydraulic supply tube (136), the piston inside the cylinder body (134) and the cylinder rod (138) connected thereto can move upward.

[0072] The support member (145) can be connected to the actuator (133). Specifically, for example, the support member (145) can be connected to the actuator (133) via a base (140) and a plurality of spacers (143). The base (140) is fixedly coupled to the lower end of the cylinder rod (138) of the actuator (133), and a plurality of spacers (143) can be interposed between the base (140) and the support member (145).

[0073] The upper portions of the plurality of spacers (143) are fixedly connected to the base (140), and the lower portions of the plurality of spacers (143) are fixedly connected to the support body (145), so that the lower surface of the base (140) and the upper surface (147) of the support body (145) can be spaced apart at a constant distance. The plurality of spacers (143) can connect the base (140) and the support body (145) so that the base (140) and the support body (145) are spaced apart.

[0074] A support body (145) can support the terminal body (150) so that it moves between a contact position and a separation position together with the terminal body (150). To prevent the terminal body (150) from unintentionally coming into contact with a surrounding conductive object and causing a problem such as a short circuit, the support body (145) may be made of an insulating material, such as plastic, and may be positioned to surround the terminal body (150).

[0075] The terminal body (150) may further include a plurality of contact pins (151), a number of coupling rings (163) equal to the number of contact pins (151), a terminal plate (160), and a plurality of fixing screws (167). The plurality of contact pins (151) may be arranged in a line in a first direction.

[0076] Each contact pin (151) may include a pin portion (152) extended in a third direction to penetrate the support (145) in a third direction, and a hammer portion (157) that follows below the pin portion (152) and extends in a first direction and a second direction at the boundary with the pin portion (152).

[0077] A plurality of through holes (149) are formed in the support member (145) so that the pin portions (152) of a plurality of contact pins (151) pass through the support member (145) in a third direction. The support member (145) may be extended in a first direction.

[0078] A long groove (146) extending in a first direction and open downward can be formed in the lower part of the support body (145) so that the hammer portions (157) of a plurality of contact pins (151) can be partially accommodated. The plurality of contact pins (151) can be arranged in a row on the long groove (146). The plurality of hammer portions (157) can protrude outward from the support body (145). For example, the lower surface of the plurality of hammer portions (157) can protrude downward from the support body (145).

[0079] A plurality of coupling rings (163) and a plurality of contact pins (151) can correspond one-to-one. The coupling ring (163) can be mounted on the pin portion (152) between the support (145) and the terminal plate (160). The outer diameter of the coupling ring (163) may be larger than the inner diameter of the through hole (149).

[0080] A connecting ring (163) is fastened to the upper end of a pin portion (152) that penetrates the through hole (149) of the support body (145) in a third direction and protrudes over the upper surface (147) of the support body (145), thereby allowing the contact pin (151) to be suspended and supported without being separated from the support body (145). For example, the connecting ring (163) is a C-ring in the shape of the letter C, and a groove may be formed on the outer circumference of the pin portion (152) into which a projection protruding inwardly from the connecting ring (163) is fitted.

[0081] The terminal plate (160) is made of a conductive material, such as metal, and can be placed on the upper surface of a plurality of pin portions (152). The terminal plate (160) can be fixed in contact with the plurality of pin portions (152) by means of a fixing screw (167). A screw hole (153) open toward the upper surface is formed in the pin portion (152) so that the fixing screw (167) can be fastened, and a terminal plate through hole (161) aligned with the screw hole (153) can be formed in the terminal plate (160).

[0082] In FIGS. 7 and FIGS. 10, only one fixing screw (167) inserted and fastened to one of the contact pins (151) among the plurality of contact pins (151) is shown, but this is exemplary, and the terminal body (150) may include a plurality of fixing screws (167) so that the terminal plate (160) can be firmly contacted and supported by the plurality of contact pins (151).

[0083] A plurality of fixing screws (167) may be attached one by one to all contact pins (151) except for the contact pin (151) to which the terminal connecting screw (170) is attached, or a plurality of fixing screws (167) may be attached one by one to some of the contact pins (151) among the plurality of contact pins (151).

[0084] The tangential device (130A) may further include a terminal connecting screw (170) that is fastened to a pin portion (152) by pressing a terminal of the power supply device (115) against the terminal plate (160) so that the power supply device (115) and the terminal plate (160) are electrically connected. The terminal connecting screw (170) secures one of the positive terminal and negative terminals (not shown) of the power supply device (115) to the terminal plate (160) so that it can conduct electricity.

[0085] When one of the positive and negative terminals of a power supply device (115) is placed on a terminal plate (160) and a terminal connecting screw (170) is fastened to a screw hole (153) of a pin portion (152) and a terminal plate through hole (161) aligned with the screw hole (153), the head of the terminal connecting screw (170) presses the terminal of the power supply device (115) toward the terminal plate (160), thereby allowing the terminal of the power supply device (115) and the terminal plate (160) to be electrically connected.

[0086] When the terminal body (150) moves to a contact position, the lower side of the hammer part (157) can come into contact with the tangential wire (15). A plurality of contact pins (151) of the terminal body (150) can move simultaneously to a contact position by the power of the actuator (133) and come into contact with a plurality of tangential wires (15) so as to be electrically conductive.

[0087] The length in the first direction of the terminal body (150) of the first tangential device (130A) may not be greater than the width in the first direction of a solar cell string (10). A plurality of hammer parts (157) included in the terminal body (150) can simultaneously contact and press a plurality of tangential wires (15) belonging to a solar cell string (10) one by one.

[0088] In the case of the first tangential device (130A) included in the solar cell module inspection device (100) illustrated in FIGS. 1 to 3, each hammer part (157) included in the terminal body (150) can simultaneously contact and press a pair of tangential wires (15) that are spaced apart from each other in a pair of solar cell strings (10) arranged in the same column of row 1 and row 2. When the terminal body (150) moves from the contact position to the spaced position, current no longer flows through the plurality of solar cell strings (10).

[0089] The elastic member (175) cushions the impact when the terminal body (150) moves to a contact position by the power of the actuator (133) and collides with a plurality of tangential wires (15). The elastic member (175) may be provided in multiple numbers corresponding one-to-one with the number of contact pins (151). The elastic member (175) may be a coil spring. Each elastic member (175) may be fitted into the pin portion (152).

[0090] The elastic member (175) may be placed on the pin portion (152) between the support (145) and the hammer portion (157). One side of the elastic member (175) may be supported by the support (145), and the opposite side may be supported by the hammer portion (157). The upper end of the elastic member (175) may be supported on the lower surface (148) of the support (145), and the lower end of the elastic member (175) may be supported on the upper surface of the hammer portion (157).

[0091] With this configuration, the contact pin (151) can be elastically biased so that the hammer portion (157) faces downward. When the hammer portion (157) moves on the support (145), the elastic member (175) can be elastically deformed. Furthermore, when the hammer portion (157) collides with the tangential wire (15), the elastic member (175) is elastically compressed to cushion the impact, thereby preventing breakage and damage to the tangential wire (15).

[0092] Meanwhile, the second tangent device (130B) illustrated in FIGS. 1 to 3 may include a connecting arm, an actuator, a support, a terminal body, an elastic member, a base, and a spacer, just like the first tangent device (130A). Therefore, a detailed description of the second tangent device (130B) will be omitted.

[0093] However, the length of the terminal body in the first direction of the second tangent device (130B) may be greater than the width of the solar cell string (10) in the first direction and may not be greater than the sum of the width of a pair of solar cell strings (10) and the spacing between a pair of solar cell strings (10), but is not limited thereto, and the width and length of the second tangent device (130B) may be set in various ways as needed. In addition, the number of contact pins included in the terminal body of the second tangent device (130B) may be twice the number of contact pins (151) included in the first tangent device (130A), but is not limited thereto, and the number may be adjusted as needed.

[0094] A plurality of contact pins included in the terminal body of the second tangential device (130B) can simultaneously contact and press one by one a plurality of tangential wires (15) belonging to a pair of solar cell strings (10) arranged in the first direction.

[0095] Referring again to FIGS. 1 to 3, the solar cell module inspection device (100) according to the first embodiment of the present invention may further include a solar cell string replacement device (127) that automatically replaces a solar cell string (10) determined to be defective by an electroluminescent inspector (120) with a new solar cell string (10). The solar cell string replacement device (127) may include a robot arm that grasps and moves the solar cell string (10).

[0096] Since the tangent device (130A, 130B) is not joined to the tangent wire (15) by means such as soldering, and is cleanly separated from the tangent wire (15) without leaving any trace when in a separated position, the worker can automatically replace the defective solar cell string (10) with a new solar cell string (10) using the solar cell string replacement device (127) without manually replacing the defective solar cell string (10).

[0097] FIG. 11 is a block diagram illustrating a solar cell module inspection method according to an embodiment of the present invention. Referring to FIGS. 1 to 5 and FIG. 11, the solar cell module inspection method according to an embodiment of the present invention includes a solar cell string arrangement step (S10), a tangential device contact step (S20), an electroluminescence inspection step (S30), and a tangential device separation step (S40, S60). The solar cell module inspection method according to an embodiment of the present invention can be performed using a solar cell module inspection device (100) according to a first embodiment of the present invention illustrated in FIGS. 1 to 3.

[0098] The solar cell string arrangement step (S10) is a step of arranging a plurality of solar cell strings (10) in a first direction. For example, as illustrated in FIG. 4, six solar cell strings (10) can be arranged in the first direction, and another six solar cell strings (10) can be additionally arranged in the first direction to form a matrix (20) of 2 rows and 6 columns. The plurality of solar cell strings (10) forming the matrix (20) can be arranged on a stage (101).

[0099] The tangential device contact step (S20) is a step of contacting a plurality of tangential devices (130A, 130B) to a plurality of solar cell strings (10) so that the plurality of solar cell strings (10) forming a matrix (20) are energized. The terminal body (150) of the tangential device (130A, 130B) can move to a contact position along a third direction and be energized to contact a plurality of tangential wires (15) of the plurality of solar cell strings (10).

[0100] The tangent device contact step (S20) has been specifically described while describing the tangent devices (130A, 130B) with reference to FIGS. 1 to 3 and FIGS. 7 to 10, so a redundant description is omitted.

[0101] The electroluminescence inspection step (S30) is a step of detecting the electroluminescence of a plurality of solar cell strings (10) while a plurality of tangential devices (130A, 130B) are in contact with a plurality of solar cell strings (10) to inspect whether the plurality of solar cell strings (10) are defective. Since the electroluminescence inspection step (S30) has been specifically described while describing the electroluminescence inspection device (120) with reference to FIGS. 1 to 3, a redundant description is omitted.

[0102] The tangential device separation step (S40, S60) is a step of separating a plurality of tangential devices (130A, 130B) from a plurality of solar cell strings (10). The terminal body (150) of the tangential device (130A, 130B) can be separated from a plurality of tangential wires (15) of a plurality of solar cell strings (10) by moving to a separation position along a third direction.

[0103] The tangential device separation step (S40, S60) can be divided into a tangential device separation step (S40) when there is a defect and a tangential device separation step (S60) when there is no defect, depending on the result of the electroluminescence inspection step (S30).

[0104] In the case where at least some of the solar cell strings (10) among the plurality of solar cell strings (10) are determined to be defective during the electroluminescence inspection step (S30), the solar cell module inspection method according to one embodiment of the present invention may further include a string replacement step (S50) after the tangent device separation step (S40).

[0105] The string replacement step (S50) is a step of replacing a defective solar cell string (10) with another solar cell string (10) of the same type. The string replacement step (S50) can be performed automatically by a solar cell string replacement device (127) or manually by a worker.

[0106] After the string replacement step (S50), the tangential device contact step (S20) and the electroluminescence inspection step (S30) may be performed again. In the electroluminescence inspection step (S30), at least some of the solar cell strings (10) among the plurality of solar cell strings (10) forming the matrix (20) may be determined to be defective.

[0107] In this case, the tangential device separation step (S40) and the string replacement step (S50) may be performed again. In this way, the tangential device contact step (S20), the electroluminescence inspection step (S30), the tangential device separation step (S40), and the string replacement step (S50) may be repeated until all solar cell strings (10) are determined to be good products in the electroluminescence inspection step (S30).

[0108] When all solar cell strings (10) are determined to be good products in the electroluminescence inspection step (S30), the tangential device separation step (S60) is performed. The solar cell module inspection method according to one embodiment of the present invention may further include a solar cell module assembly step (S70).

[0109] The solar cell module assembly step (S70) may include, for example, a step of soldering a cross connector (not shown) to a plurality of tangent wires (15) of a plurality of solar cell strings (10) that have all been determined to be good products, and a step of installing the plurality of solar cell strings (10) with the cross connectors joined so as to be received in a frame (not shown).

[0110] According to the present invention described above, when performing an electroluminescence inspection to determine whether a plurality of solar cell strings (10) arranged in a matrix (20) are defective through electroluminescence, the plurality of solar cell strings (10) are inspected by bringing the tangential devices (130A, 130B) into contact and then separating them, thereby improving the speed of the electroluminescence inspection of the solar cell module and the speed of replacing the solar cell string (10) determined to be defective with a new solar cell string (10) of the same type.

[0111] In addition, it is easy to automate the process of electroluminescence inspection and replacing a solar cell string (10) that has been determined to be defective with a new solar cell string (10) of the same type.

[0112] FIG. 12 is a schematic plan view of a solar cell module inspection device according to a second embodiment of the present invention. While the solar cell module inspection device (100) according to the first embodiment of the present invention is a device for inspecting a so-called portrait type solar cell module in which the length in the second direction, i.e., the length in the longitudinal direction, is longer than the length in the first direction, i.e., the length in the transverse direction, the solar cell module inspection device (200) according to the second embodiment of the present invention may be a device for inspecting a so-called landscape type solar cell module in which the length in the first direction, i.e., the length in the transverse direction, is longer than the length in the second direction, i.e., the length in the longitudinal direction.

[0113] Referring to FIG. 12, a landscape-type solar cell module may include a plurality of solar cell strings (40) each extending in a second direction and arranged in a first direction. Each solar cell string (40) may include a plurality of solar cell cells (30) arranged in a line in the second direction to conduct electricity.

[0114] Similar to the solar cell module inspection device (100) according to the first embodiment of the present invention, the solar cell module inspection device (200) according to the second embodiment of the present invention may also include a plurality of tangent devices (130A, 130B).

[0115] Specifically, the plurality of tangent devices (130A, 130B) may include a pair of first tangent devices (130A) and 14 second tangent devices (130B). Since the configuration of the first tangent device (130A) and the second tangent device (130B) is identical to the first tangent device (130A) and the second tangent device (130B) included in the solar cell module inspection device (100) according to the first embodiment of the present invention, a redundant description is omitted.

[0116] Each solar cell string (40) may include a plurality of tangential wires (not shown) that are electrically contactable with tangential devices (130A, 130B) at the longitudinal end, i.e., the end in the second direction.

[0117] One of the pair of first tangent devices (130A) may be positioned so as to be aligned along the third direction with the tangent wire between the solar cell string (40) in row 1, column 1 and the solar cell string (40) in row 2, column 1, and the other may be positioned so as to be aligned along the third direction with the tangent wire between the solar cell string (40) in row 1, column 10 and the solar cell string (40) in row 2, column 10.

[0118] Four of the 14 second tangent devices (130B) can be arranged in a line along the first direction so as to be aligned along the tangent wire and the third direction between a pair of first tangent devices (130A).

[0119] Five of the 14 second tangent devices (130B) can be arranged in a line along the first direction so as to be aligned along the third direction with the tangent wires of the 10 solar cell strings (40) in the first row that do not face the 10 solar cell strings (40) in the second row.

[0120] The remaining 5 of the 14 second tangent devices (130B) may be arranged in a line along the first direction so as to be aligned along the third direction with the tangent wires of the 6 solar cell strings (40) in the second row that do not face the 10 solar cell strings (40) in the first row. Meanwhile, the number of first tangent devices (130A) and the number of second tangent devices (130B) may vary depending on the arrangement and size of the plurality of solar cell strings (40).

[0121] The solar cell module inspection device (200) may further include a power supply device (not shown) for supplying power to a plurality of solar cell strings (40) arranged in a matrix. The positive terminal of the power supply device may be electrically connected to one of a pair of first tangent devices (130A), and the negative terminal may be electrically connected to the other of a pair of first tangent devices (130A).

[0122] When the positive terminal and negative terminal of the power supply device are electrically connected to a pair of first tangent devices (130A), and all tangent devices (130A, 130B) are in contact with all tangent wires of a plurality of solar cell strings (40), and power is supplied from the power supply device, current can flow through the plurality of solar cell strings (40) forming a matrix.

[0123] FIG. 13 is a schematic plan view of a solar cell module inspection device according to a third embodiment of the present invention. While the solar cell module inspection device (100) according to the first embodiment of the present invention is a device for inspecting a so-called portrait-type solar cell module in which the length in the second direction, i.e., the length in the longitudinal direction, is longer than the length in the first direction, i.e., the length in the transverse direction, the solar cell module inspection device (300) according to the third embodiment of the present invention may be a device for inspecting a so-called landscape-type solar cell module in which the length in the first direction, i.e., the length in the transverse direction, is longer than the length in the second direction, i.e., the length in the longitudinal direction.

[0124] Referring to FIG. 13, a landscape-type solar cell module may include a plurality of solar cell strings (60) each extending in a second direction and arranged in a first direction. Each solar cell string (60) may include a plurality of solar cell cells (50) arranged in a line in the second direction to conduct electricity.

[0125] The solar cell string (60) illustrated in FIG. 13 may include a plurality of solar cell cells (50) arranged in a second direction in a greater number than the solar cell string (40) illustrated in FIG. 12. The size of the solar cell cells (50) included in the solar cell string (60) of FIG. 13 may be smaller than the size of the solar cell cells (30) included in the solar cell string (40) of FIG. 12.

[0126] Similar to the solar cell module inspection device (100) according to the first embodiment of the present invention, the solar cell module inspection device (300) according to the third embodiment of the present invention may also include a plurality of tangent devices (130A, 130B).

[0127] Specifically, the plurality of tangent devices (130A, 130B) may include a pair of first tangent devices (130A) and 14 second tangent devices (130B). Since the configuration of the first tangent device (130A) and the second tangent device (130B) is identical to the first tangent device (130A) and the second tangent device (130B) included in the solar cell module inspection device (100) according to the first embodiment of the present invention, a redundant description is omitted.

[0128] Each solar cell string (60) may include a plurality of tangential wires (not shown) that are electrically contactable with tangential devices (130A, 130B) at the longitudinal end, i.e., the end in the second direction.

[0129] One of the pair of first tangent devices (130A) may be positioned so as to be aligned along the third direction with the tangent wire between the solar cell string (60) in row 1, column 1 and the solar cell string (60) in row 2, column 1, and the other may be positioned so as to be aligned along the third direction with the tangent wire between the solar cell string (60) in row 1, column 10 and the solar cell string (60) in row 2, column 10.

[0130] Four of the 14 second tangent devices (130B) can be arranged in a line along the first direction so as to be aligned along the tangent wire and the third direction between a pair of first tangent devices (130A).

[0131] Five of the 14 second tangent devices (130B) can be arranged in a line along the first direction so as to be aligned along the third direction with the tangent wires of the 10 solar cell strings (60) in the first row that do not face the 10 solar cell strings (60) in the second row.

[0132] The remaining 5 of the 14 second tangent devices (130B) may be arranged in a line along the first direction so as to be aligned along the third direction with the tangent wires that do not face the 10 solar cell strings (60) in the first row among the tangent wires of the 6 solar cell strings (60) in the second row. Meanwhile, the number of first tangent devices (130A) and the number of second tangent devices (130B) may vary depending on the arrangement and size of the plurality of solar cell strings (60).

[0133] The solar cell module inspection device (300) may further include a power supply device (not shown) for supplying power to a plurality of solar cell strings (60) arranged in a matrix. The positive terminal of the power supply device may be electrically connected to one of a pair of first tangent devices (130A), and the negative terminal may be electrically connected to the other of a pair of first tangent devices (130A).

[0134] When the positive and negative terminals of the power supply device are electrically connected to a pair of first tangent devices (130A), and all tangent devices (130A, 130B) are in contact with all tangent wires of a plurality of solar cell strings (60), and power is supplied from the power supply device, current can flow through the plurality of solar cell strings (60) forming a matrix.

[0135] FIG. 14 is a schematic plan view of a solar cell module inspection device according to a fourth embodiment of the present invention. While the solar cell module inspection device (100) according to a first embodiment of the present invention is a device for inspecting a solar cell module in which an even number of solar cell strings (10) are arranged in a first direction, the solar cell module inspection device (400) according to a fourth embodiment of the present invention may be a device for inspecting a solar cell module in which an odd number of solar cell strings (80) are arranged in a first direction.

[0136] Referring to FIG. 14, the solar cell module may include a plurality of solar cell strings (80) each extending in a second direction and arranged in groups of five in a first direction. Specifically, the plurality of solar cell strings (80) may be arranged in a 2x5 row. Each solar cell string (80) may include a plurality of solar cell cells (70) arranged in a row in the second direction to allow current to flow.

[0137] Similar to the solar cell module inspection device (100) according to the first embodiment of the present invention, the solar cell module inspection device (400) according to the fourth embodiment of the present invention may also include a plurality of tangent devices (130A, 130B).

[0138] Specifically, the plurality of tangent devices (130A, 130B) may include five first tangent devices (130A) and five second tangent devices (130B). Since the configuration of the first tangent device (130A) and the second tangent device (130B) is identical to the first tangent device (130A) and the second tangent device (130B) included in the solar cell module inspection device (100) according to the first embodiment of the present invention, a redundant description is omitted.

[0139] Each solar cell string (80) may include a plurality of tangential wires (not shown) that are electrically contactable with tangential devices (130A, 130B) at the longitudinal end, i.e., the end in the second direction.

[0140] One of the five first tangent devices (130A) may be positioned so as to be aligned along the third direction with the tangent wire between the solar cell string (80) in row 1, column 1 and the solar cell string (80) in row 2, column 1, another may be positioned so as to be aligned along the third direction with the tangent wire between the solar cell string (80) in row 1, column 4 and the solar cell string (80) in row 2, column 4, and yet another may be positioned so as to be aligned along the third direction with the tangent wire between the solar cell string (80) in row 1, column 5 and the solar cell string (80) in row 2, column 5.

[0141] One of the remaining two first tangent devices (130A) may be arranged to be aligned along a third direction with a tangent wire that does not face the tangent wire of the solar cell string (80) in row 3 of row 1 among the tangent wires of the solar cell string (80) in row 3 of row 1, and the other of the remaining two first tangent devices (130A) may be arranged to be aligned along a third direction with a tangent wire that does not face the tangent wire of the solar cell string (80) in row 3 among the tangent wires of the solar cell string (80) in row 3 of row 2 among the tangent wires of row 3 of row 1.

[0142] Five second tangent devices (130B) can be arranged to be aligned along the third direction with the tangent wire of the solar cell string (80) at a location where five first tangent devices (130A) are not placed. Meanwhile, the number of first tangent devices (130A) and the number of second tangent devices (130B) may vary depending on the arrangement and size of the plurality of solar cell strings (8).

[0143] The solar cell module inspection device (400) may further include a pair of connecting wires (450). One of the pair of connecting wires (450) can electrically connect the tangential wire of the solar cell string (80) in row 1, column 3 and the tangential wire of the solar cell string (80) in row 1, column 4 via the first connecting device (130A). The other of the pair of connecting wires (450) can electrically connect the tangential wire of the solar cell string (80) in row 2, column 3 and the tangential wire of the solar cell string (80) in row 2, column 4 via the first connecting device (130A).

[0144] The solar cell module inspection device (400) may further include a power supply device (not shown) for supplying power to a plurality of solar cell strings (80) arranged in a matrix. The positive terminal of the power supply device may be electrically connected to a first tangent device (130A) aligned along a tangent wire and a third direction between a solar cell string (80) in row 1, column 1 and a solar cell string (80) in row 2, column 1, and the negative terminal of the power supply device may be electrically connected to a first tangent device (130A) aligned along a tangent wire and a third direction between a solar cell string (80) in row 1, column 5 and a solar cell string (80) in row 2, column 5.

[0145] When the positive and negative terminals of the power supply device are electrically connected to a pair of first tangent devices (130A), and all tangent devices (130A, 130B) are in contact with all tangent wires of a plurality of solar cell strings (60), and power is supplied from the power supply device, current can flow through a plurality of solar cell strings (80) forming a matrix.

[0146] The tangent device and solar cell module inspection device of the present invention can be applied to inspect the electroluminescence of solar cell modules of various shapes not shown in FIGS. 1 to 4 and FIGS. 12 to 14, in addition to the solar cell modules shown in FIGS. 1 to 4 and FIGS. 12 to 14.

[0147] For example, the solar cell module illustrated in FIG. 4 includes a solar cell string (10) in which 13 solar cell cells (1) are arranged in a second direction, but the tangential device and solar cell module inspection device of the present invention may be configured to inspect a solar cell module including more or fewer than 13 solar cell cells (1).

[0148] Additionally, FIGS. 4, 12 to 15 disclose a tangential device and a solar cell module inspection device for inspecting a so-called 'duo solar cell module' in which a group of solar cell strings, comprising a plurality of solar cell strings (10, 40, 60, 80) arranged in a row in a first direction, is arranged in two rows; however, the tangential device and the solar cell module inspection device of the present invention may be configured to be applied to inspecting a so-called 'single solar cell module' consisting only of a group of solar cell strings.

[0149] Although the present invention has been described with reference to the embodiments illustrated in the drawings, this is merely illustrative, and those skilled in the art will understand that various modifications and equivalent alternative embodiments are possible therefrom. Accordingly, the true technical scope of protection of the present invention should be determined by the claims below. Explanation of the symbols

[0151] 1: Solar cell 10: Solar cell string 15: Tangent wire 100: Solar cell module inspection device 101: Stage 105: 1st Support Beam 110: Second support beam 120: Electroluminescence inspector 121: Camera 123; Defect detector 130A, 130B: Tangential device 133: Actuator 145: Support body 150: Terminal body 151: Contact pin 160: Terminal plate 163: Connecting ring 175: Elastic member

Claims

Claim 1 A tangential device comprising: a terminal body made of a conductive material and movable between a contact position in contact with a tangential wire of a solar cell string and a separation position separated from the tangential wire; and an actuator providing power to move the terminal body between the contact position and the separation position; wherein the terminal body comprises: a terminal plate electrically connected to a power supply device; and a plurality of contact pins inserted into a support made of an insulating material, connected to the terminal plate, and having an extended hammer portion protruding outward from the support. Claim 2 A tangential device according to claim 1, wherein the support surrounds the terminal body and moves the terminal body between the contact position and the separation position by the operation of the actuator. Claim 3 In claim 1, the plurality of contact pins are tangential devices penetrating the support. Claim 4 In claim 1, each of the contact pins further comprises a pin portion penetrating a through hole of the support; and the hammer portion is a tangential device connected to the pin portion. Claim 5 In claim 4, the support member has an elongated groove formed in the longitudinal direction, and a plurality of the contact pins are arranged in a row on the elongated groove in a tangential device. Claim 6 In claim 4, the tangential device further comprises a connecting ring having an outer diameter larger than the inner diameter of the through hole, which is mounted on the pin portion between the support and the terminal plate. Claim 7 A tangential device according to claim 4, further comprising an elastic member disposed on the pin portion between the support and the hammer portion, and elastically deformed when the hammer portion moves relative to the support. Claim 8 In claim 7, the elastic member surrounds the pin portion, and the tangential device is supported on one side by the support and on the opposite side by the hammer portion. Claim 9 In claim 4, the tangential device further comprises a fixing screw that penetrates the terminal plate and is fastened to the pin portion to connect the terminal plate and a plurality of the pin portions. Claim 10 A tangential device further comprising, in claim 4, a terminal connecting screw that is fastened to the pin portion by pressing the terminal of the power supply device against the terminal plate so as to electrically connect the power supply device and the terminal plate. Claim 11 A tangential device according to claim 1, further comprising: a base coupled to the actuator; and a spacer interposed between the base and the support so as to separate the base and the support. Claim 12 A tangential device according to claim 11, wherein the actuator comprises: a cylinder body; and a cylinder rod coupled to the base and advancing in a direction protruding from the cylinder body and a direction inserted into the cylinder body. Claim 13 A solar cell module inspection device comprising: a stage for supporting a plurality of solar cell strings arranged in a first direction; a tangential device that selectively contacts a plurality of solar cell strings so that the plurality of solar cell strings are energized; and an electroluminescence inspector that detects electroluminescence (EL) of a plurality of solar cell strings while the tangential device is in contact with the plurality of solar cell strings to inspect whether the plurality of solar cell strings are defective; wherein the tangential device comprises: a terminal plate electrically connected to a power supply device; and a contact pin having a hammer portion inserted into a support made of an insulating material, connected to the terminal plate, and protruding outward from the support. Claim 14 A solar cell module inspection device according to claim 13, wherein the solar cell string extends in a second direction, and the solar cell string comprises a tangential wire provided at the end of the solar cell string in the second direction and capable of making contact with the tangential device. Claim 15 A solar cell module inspection device according to claim 14, wherein the tangent device comprises: a terminal body made of a conductive material and movable between a contact position in contact with the tangent wire and a separation position separated from the tangent wire; and an actuator that provides power to move the terminal body between the contact position and the separation position. Claim 16 A solar cell module inspection device according to claim 15, wherein the tangent device further comprises a support made of an insulating material, surrounding the terminal body, and moving the terminal body between the contact position and the separation position by the operation of the actuator. Claim 17 In claim 15, the terminal body is a solar cell module inspection device movable between the contact position and the separation position along a third direction orthogonal to the first direction and the second direction. Claim 18 delete Claim 19 A solar cell module inspection device according to claim 14, further comprising: a first support beam extending in the first direction and having the tangent device installed thereon; and a second support beam extending in the second direction and having the first support beam installed so as to be movable in the second direction. Claim 20 A solar cell module inspection method comprising: a solar cell string arrangement step of arranging a plurality of solar cell strings in a first direction; a tangential device contact step of contacting a plurality of contact pins, each having a terminal plate connected to a power supply device and an extended hammer portion, to the plurality of solar cell strings so that the plurality of solar cell strings are energized; an electroluminescence inspection step of detecting electroluminescence of the plurality of solar cell strings while the tangential device is in contact with the plurality of solar cell strings to inspect whether the plurality of solar cell strings are defective; and a tangential device separation step of separating the tangential device from the plurality of solar cell strings. Claim 21 A solar cell module inspection method according to claim 20, further comprising a string replacement step in which, if at least some of the plurality of solar cell strings are determined to be defective in the electroluminescence inspection step, the defective solar cell string is replaced with another solar cell string of the same type after the tangent device separation step.

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