CN209283186U - Solar cell test device - Google Patents

Abstract

The utility model provides a solar cell testing device, which comprises a bracket and a plurality of probe sets arranged on the bracket, each probe set includes an insulating body and relatively independent current probes and a parallel arrangement on the insulating body. Voltage probes, each set of current probes and voltage probes are brought close to each other so that the current probes and voltage probes contact the same probe contact point of the solar cell at the same time. By arranging the current probe and the voltage probe on the solar cell testing device independently of each other and close to each other, the current probe and the voltage probe can be in contact with the same probe contact point on the solar cell at the same time, without adding probes The number of contact points to avoid introducing additional shading; and the current probe and voltage probe are independent of each other, and the test is accurate.

Description

Solar cell test device

technical field

The utility model relates to the field of photovoltaic technology, in particular to a solar cell testing device.

Background technique

The general solar cell test uses the four-wire method. The voltage probe and the current probe are set independently and appear in pairs, and they are tied to the main grid to test the cells. For batteries with multiple busbar structures, the current mainstream products are nine busbar batteries and twelve busbar batteries. The busbar width of these two types of batteries is less than 100 microns, which is not easy to contact with the test probe. Probe contact points with larger area are placed on the busbar at specific positions for making contact with the probes. For ordinary probes, only one probe can be attached to the contact point of the probe, so the current multi-busbar production line test uses the two-wire method, and the voltage probe and current probe of the two-wire method are the same, because it cannot be eliminated. The series resistance of the probe itself and the contact between the probe and the busbar, so the test error of the two-wire method is extremely large. If the four-wire method is used, the number of probe contacts must be increased, which introduces additional shading and reduces the battery current value.

Therefore, it is necessary to design a solar cell testing device to solve the above problems.

Utility model content

The purpose of the utility model is to provide a solar cell testing device which can be used for testing multi-busbar structure cells by four-wire method.

In order to achieve the above purpose, the utility model adopts the following technical scheme: a solar cell testing device, which includes a bracket and a plurality of probe groups arranged on the bracket, and each probe group includes an insulating body and is arranged in parallel on the insulating body. There are relatively independent current probes and voltage probes, and each group of current probes and voltage probes is close to each other so that the current probes and voltage probes are in contact with the same probe contact point of the solar cell at the same time.

As a further improved technical solution of the present invention, the current probe and the voltage probe respectively comprise an upper part of the probe, a lower part of the probe, and an elastic member connecting the upper part of the probe and the lower part of the probe, when the lower part of the probe is subjected to upward pressure , the elastic member is compressed by force.

As a further improved technical solution of the present invention, the probe group is movably mounted on the bracket.

As a further improved technical solution of the present invention, the bracket includes a conductive portion, and the conductive portion includes a first conductive end and a second conductive end that are independent of each other, and the current probe and the voltage probe are respectively connected to the first conductive end. contact with the second conductive end.

As a further improved technical solution of the present invention, the current probe and the voltage probe penetrate through the insulating body, the lower part of the probe is used to contact the same probe contact point, and the upper part of the probe is respectively connected to the first The conductive end and the second conductive end are in contact.

As a further improved technical solution of the present invention, the probe set further includes a mounting portion provided on the upper part of the probe to movably mount the probe set on the bracket.

As a further improved technical solution of the present invention, the installation part includes an insulating connecting rod passing through the upper part of the probe, the conductive part passes through the space formed by the upper part of the probe and the connecting rod, and the first The conductive end and the second conductive end are respectively arranged on two sides of the conductive portion.

As a further improved technical solution of the present invention, the number of the connecting rods is two.

As a further improved technical solution of the present invention, the lower parts of the probes of the current probe and the voltage probe are semi-cylindrical bodies symmetrically arranged with each other.

As a further improved technical solution of the present invention, the upper parts of the probes of the current probe and the voltage probe are semi-cylindrical bodies symmetrically arranged with each other, and the connecting rod is a screwable connecting rod.

It can be seen from the above technical solutions that the current probe and the voltage probe on the solar cell testing device are independent and close to each other in the present invention, so that the current probe and the voltage probe can be simultaneously connected with the same probe on the solar cell. Needle contact point contact, no need to increase the number of probe contact points, avoid introducing additional shading; and the current probe and voltage probe are independent of each other, and the test is accurate.

Description of drawings

FIG. 1 is a perspective view of the solar cell testing device of the present invention.

FIG. 2 is a partial view of the solar cell testing apparatus of FIG. 1 .

FIG. 3 is a front view of the solar cell testing device in FIG. 1 .

FIG. 4 is a perspective view of the probe set in FIG. 1 .

Detailed ways

In order to make the objectives, technical solutions and advantages of the present utility model more clear, the present utility model will be described in detail below with reference to the accompanying drawings and specific embodiments.

Referring to FIGS. 1 to 4 , the present invention provides a solar cell testing device 10 for connecting solar cells to the testing device, which includes a bracket 100 and a plurality of probe sets 200 disposed on the bracket 100 . Each probe set 200 includes an insulating body 210 and a current probe 220 and a voltage probe 230 which are arranged on the insulating body 210 in parallel and independent of each other.

Referring to FIG. 4 , specifically, the current probe 220 and the voltage probe 230 respectively include probe upper parts 222 , 232 , probe lower parts 221 , 231 , and connecting probe upper parts 222 , 232 and probe lower parts 221 , 231 . The elastic pieces 223, 233 are used to conduct electrical signals between the probe upper part 222, 232 and the probe lower part 221, 231 on the one hand; , 233 are compressed by force, so that when the current probe 220 and the voltage probe 230 are in contact with the probe contact point, under the elastic force of the elastic members 223, 233, the contact pressure is uniform and the conduction is good. Preferably, the elastic members 223 and 233 are springs with good electrical conductivity.

The insulating body 210 is made of insulating material such as PVC or PVDF, and is used to isolate the current probe 220 and the voltage probe 230 and fix the positions of the current probe 220 and the voltage probe 230 therein. This arrangement ensures that the current probe 220 and the voltage probe 230 do not contact each other.

Referring to FIG. 2 and FIG. 3 , the bracket 100 includes an upper bracket 110 , a lower bracket 120 and a conductive portion 130 which are arranged parallel to each other. Both the upper bracket 110 and the lower bracket 120 are PCB boards or other insulating materials. The conductive portion 130 includes an insulating strip 131 and an independent first conductive end 132 and a second conductive end 133 disposed on both sides of the insulating strip 131 . contact to conduct current and voltage. The insulating strip 131 is preferably an insulating material such as a PCB board to isolate current and voltage.

Referring to FIG. 4 , in the present invention, the current probe 220 and the voltage probe 230 penetrate through the insulating body 210 , that is, the upper probe 222 , 232 and the lower probe 221 , 231 partially protrude out of the insulating body 210 , the lower parts 221 and 231 of the probes are respectively in contact with the same probe contact point, and the upper ends of the current probes 220 and the voltage probes 230 are respectively in contact with the first conductive end 132 and the second conductive end 133 . It should be noted that the parts of the lower parts 221 and 231 of the probes that are in contact with the contact points of the probes are located on the same plane. In this way, each group of the current probes 220 and the voltage probes 230 are arranged close to each other so that the current probes 220 and the voltage probes are arranged close to each other. 230 can simultaneously make contact with the same probe contact point of the solar cell.

The probe set 200 further includes a mounting portion 140 provided on the probe upper parts 222 and 232 for movably mounting the probe set 200 on the bracket 100 . The mounting part 140 includes two connecting rods 141 and 142 vertically arranged on the upper ends of the current probe 220 and the voltage probe 230 . The connecting rods 141 and 142 are used to fix the probe set 200 on the bracket 100 . The probe set 200 electrically connects the solar cell with the testing device through the bracket 100 to perform current and voltage tests on the same busbar of the solar cell.

Preferably, the probe lower parts 221 and 231 are semi-cylindrical bodies symmetrically arranged with each other. This arrangement further reduces the contact area between the current probe 220 and the voltage probe 230 and the contact point of the probe, so that the probe group 200 is suitable for the busbar with narrow width, and the application of the solar cell testing device 10 of the present invention is increased. scope. Preferably, the probe upper parts 222 and 232 are also symmetrically arranged semi-cylindrical bodies. In this way, the side of the probe upper parts 222 and 232 in contact with the first conductive end 132 and the second conductive end 133 is a plane, so that the contact Large area, not easy to contact bad.

Preferably, the conductive part 130 is movable relative to the upper bracket 110 and the lower bracket 120 , and the probe group 200 is movable relative to the upper bracket 110 and the lower bracket 120 . Specifically, the connecting rod 141 is vertically arranged between the probe upper parts 222 and 232 and is connected to the probe upper parts 222 and 232 . The connecting rod 142 is arranged below the connecting rod 141 , and the conductive part 130 passes through the current probe 220 and the voltage probe. The space formed by the upper end of 230 and the connecting rods 141 and 142. The upper bracket 110 is arranged above the connecting rod 142, and the lower bracket 120 passes through the space formed by the probe upper parts 222, 232, the connecting rod 142 and the insulating body 210. The screw is set in this way, when the probe group 200 moves to the required position on the bracket 100, the connecting rods 141 and 142 are tightened to limit the movement and swing of the probe group 200 on the bracket 100, so that the current probe 220 And the voltage probe 230 is in good contact with the first conductive end 132 and the second conductive end 133 .

To sum up, in the present invention, the current probe 220 and the voltage probe 230 on the solar cell testing device 10 are arranged independently of each other and close to each other, so that the current probe 220 and the voltage probe 230 can be simultaneously connected to the same sensor on the solar cell. One probe contact point makes contact without increasing the number of probe contact points and avoids introducing additional shading; the current probe 220 and the voltage probe 230 are independent of each other, and the test is accurate; the position of the probe group 200 is adjustable, suitable for a variety of mains. Solar cells with grid structure are widely used.

Terms such as "upper", "lower", etc., referring to relative positions in space are used herein for ease of illustration to describe the relationship of one feature to another feature as shown in the figures. It can be understood that, according to different placement positions of products, the terms of relative positions in space may be intended to include different orientations other than those shown in the figures, and should not be construed as limitations on the claims.

The above embodiments are only used to illustrate the present utility model rather than limit the technical solutions described in the present utility model. The understanding of this specification should be based on those skilled in the art. However, those of ordinary skill in the art should understand that those skilled in the art can still modify or equivalently replace the present invention, and all technical solutions and improvements thereof that do not depart from the spirit and scope of the present invention , should be covered within the scope of the claims of the present utility model.

Claims (10)

1. A solar cell testing device, characterized in that it comprises a bracket and several probe groups arranged on the bracket, each probe group comprising an insulating body and relatively independent current probes arranged in parallel on the insulating body and voltage probes, each set of current probes and voltage probes are brought close to each other so that the current probes and voltage probes contact the same probe contact point of the solar cell at the same time. 2 . The solar cell testing device according to claim 1 , wherein the current probe and the voltage probe respectively comprise an upper part of the probe, a lower part of the probe, and an elastic member connecting the upper part of the probe and the lower part of the probe, and when 2 . When the lower part of the probe is subjected to upward pressure, the elastic member is compressed by force. 3 . The solar cell testing device according to claim 1 , wherein the probe set is movably mounted on the support. 4 . 4 . The solar cell testing device according to claim 2 , wherein the support comprises a conductive part, the conductive part comprises a first conductive end and a second conductive end independent of each other, the current probe and the voltage The probes are in contact with the first conductive end and the second conductive end, respectively. 5 . The solar cell testing device according to claim 4 , wherein the current probe and the voltage probe penetrate through the insulating body, and the lower part of the probe is used for contacting with the same probe contact point, so 5 . The upper part of the probe is respectively in contact with the first conductive end and the second conductive end. 6 . The solar cell testing device according to claim 5 , wherein the probe set further comprises a mounting portion provided on the upper portion of the probe to movably mount the probe set to the bracket. 7 . 7 . The solar cell testing device according to claim 6 , wherein the installation part comprises an insulating connecting rod passing through the upper part of the probe, and the conductive part passes through the upper part of the probe and the connecting rod. 8 . The space formed, the first conductive end and the second conductive end are respectively arranged on both sides of the conductive part. 8 . The solar cell testing device according to claim 7 , wherein the number of the connecting rods is two. 9 . 9 . The solar cell testing device according to claim 2 , wherein the lower part of the probe is a semi-cylindrical body symmetrically arranged with each other. 10 . 10 . The solar cell testing device according to claim 7 , wherein the upper part of the probe is a semi-cylindrical body symmetrically arranged with each other, and the connecting rod is a screwable connecting rod. 11 .