CN220085977U

CN220085977U - Detect auxiliary fixtures

Info

Publication number: CN220085977U
Application number: CN202321280675.7U
Authority: CN
Inventors: 陈培育; 张满满; 乐雄英
Original assignee: Jiangsu Runyang Yueda Photovoltaic Technology Co Ltd
Current assignee: Jiangsu Runyang Yueda Photovoltaic Technology Co Ltd
Priority date: 2023-05-25
Filing date: 2023-05-25
Publication date: 2023-11-24
Anticipated expiration: 2033-05-25

Abstract

The utility model relates to the technical field of silicon solar photovoltaic cell characterization, in particular to a detection auxiliary tool which is used for measuring the lapping resistance of a main grid and an auxiliary grid of a TOP-Con battery slice. The technical problem that a detection device for the lap resistance of the main grid and the auxiliary grid of the TOP-Con battery slice is lacking in the prior art is solved.

Description

Detect auxiliary fixtures

Technical Field

The utility model relates to the technical field of silicon solar photovoltaic cell characterization, in particular to a detection auxiliary tool.

Background

In the technical field of crystalline silicon battery manufacturing, DUP-type printing (primary and secondary grid printing) is becoming popular, and not only relates to the printing of the front surface of PERC battery technology, but also relates to the front surface printing and the back surface printing of TOP-Con battery technology. The DUP printing is superior to the SP (single pass) printing not only because of lower paste unit consumption of the DUP method, but also because the performance of the main grid paste and the auxiliary grid paste can be optimized in terms of process, thereby improving the photoelectric conversion efficiency of the battery piece.

Under the technical background of widely-used DUP printing, the existing slurry mode is generally a single variable method, for example, when the effect of the auxiliary grid slurry is detected, a certain type of main grid slurry is selected to be unchanged, the base line auxiliary grid slurry and the experimental auxiliary grid slurry are respectively used for printing on two groups of battery substrates with the same process, and then the electric properties of the base line auxiliary grid slurry and the experimental auxiliary grid slurry are compared to screen the auxiliary grid slurry with higher quality, and the same is true when the main grid slurry is screened. However, in a specific detection process, there is no simple and practical device for assisting detection.

Disclosure of Invention

In order to solve the technical problem that a detection device for the lap resistance of a main grid and a secondary grid of a TOP-Con battery slice is lacking in the prior art, the utility model provides a detection auxiliary tool, and the technical problem is solved.

The technical scheme adopted for solving the technical problems is as follows:

the utility model provides a detection auxiliary tool, which is used for measuring the overlap resistance of a main grid and an auxiliary grid of a TOP-Con battery slice, and comprises the following steps: the carrying platform is horizontally arranged and used for carrying battery slices; the positioning assembly is configured on the bearing surface of the carrier to position the battery slice; the lifting assembly comprises a guide rail vertically arranged on the carrying platform and a sliding table matched with the guide rail, and the sliding table is fixedly connected with a probe frame; the probe rack is provided with a plurality of probe holes, and probes for detection are arranged in the probe holes.

The auxiliary detection tool is used for measuring the lap resistance of the main grid and the auxiliary grid of the TOP-Con battery slice, firstly, the battery slice is placed on the bearing surface of the carrier, the positioning assembly on the bearing surface is used for positioning the battery slice, then a detector operates the sliding table to move downwards, the sliding table drives the probe frame to be close to the battery slice when moving downwards, and finally, a probe arranged in a probe hole of the probe frame contacts the battery slice so as to be convenient for detection, so that the technical problem that a detection device for the lap resistance of the main grid and the auxiliary grid of the TOP-Con battery slice is lacked in the prior art is solved.

Further, the locating component comprises a flanging locating piece and a vacuum suction hole, the flanging locating piece is abutted by two right-angle edges of the battery slice to locate the battery slice, and the vacuum suction hole adsorbs the battery slice attached to the carrying platform to lock the battery slice.

Further, the vacuum suction hole is connected to an external vacuum-pumping device by means of a suction pipe.

Further, a locking screw is arranged on the sliding table, and the locking screw is screwed to fix the sliding table on the guide rail.

Further, an end of the guide rail away from the carrier is opened to enable the sliding table to be detachably matched on the guide rail.

Further, the probe holder is made of an insulating material to insulate the probe holes from each other.

Further, a copper core is arranged in the probe hole.

Further, a part of the probe holes on the probe frame are connected through a copper sheet so that the corresponding part of the probe holes are electrically connected.

Further, the probe is inserted into the probe hole.

Further, a spring is arranged inside the probe, and the probe comprises a telescopic probe head with elasticity.

Based on the technical scheme, the utility model has the following technical effects:

Drawings

FIG. 1 is a schematic diagram of the overall structure of a detection auxiliary tool of the utility model;

FIG. 2 is a top view of the inspection assist tool of the present utility model;

FIG. 3 is a partial enlarged view of a probe holder of the inspection assisting tool of the present utility model;

FIG. 4 is a schematic diagram of a frame of the inspection assisting tool of the present utility model;

FIG. 5 is a schematic diagram of a frame of a probe holder of a detection auxiliary tool according to the present utility model;

fig. 6 is a partial schematic view of the detection assisting tool of the present utility model when testing a battery slice.

Wherein: 1-a carrying platform and 11-an air exhaust pipeline; 2-positioning components, 21-flanging positioning pieces and 22-vacuum suction holes; 3-lifting components, 31-guide rails, 32-sliding tables and 33-locking screws; 4-probe rack, 41-probe hole, 42-copper sheet; 5-probe; a-cell slice, a 1-main grid, a 2-auxiliary grid.

Detailed Description

The following description of the embodiments of the present utility model will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present utility model, but not all embodiments. The following description of at least one exemplary embodiment is merely exemplary in nature and is in no way intended to limit the utility model, its application, or uses. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.

As shown in fig. 1-5, a detection auxiliary tool is used for measuring the overlap resistance of a main grid and an auxiliary grid of a TOP-Con battery slice, and comprises a carrying platform 1, a positioning component 2, a lifting component 3 and a probe frame 4, wherein the carrying platform 1 is horizontally arranged to carry a battery slice a, the positioning component 2 is arranged on a carrying surface of the carrying platform 1 to position the battery slice a, the lifting component 3 comprises a guide rail 31 vertically arranged on the carrying platform 1 and a sliding table 32 matched with the guide rail 31, the sliding table 32 is fixedly connected with the probe frame 4, a plurality of probe holes 41 are arranged on the probe frame 4, and a detection probe 5 is arranged in the probe holes 41.

The auxiliary detection tool is used for measuring the lap resistance of the main grid a2 and the auxiliary grid a2 of the TOP-Con battery slice, firstly, the battery slice a is placed on the bearing surface of the carrier 1, the positioning component 2 on the bearing surface is used for positioning the battery slice a, then a detector operates the sliding table 32 to move downwards, the sliding table 32 drives the probe frame 4 to be close to the battery slice a when moving downwards, and finally, the probe 5 arranged in the probe hole 41 of the probe frame 4 touches the battery slice a so as to be convenient for detection, so that the technical problem that a detection device for the lap resistance of the main grid and the auxiliary grid of the TOP-Con battery slice is lacked in the prior art is solved.

In a preferred embodiment of the present utility model, the positioning assembly 2 includes a hemming positioning member 21 and a vacuum suction hole 22, the hemming positioning member 21 being abutted by both right-angle sides of the battery slice a to position the battery slice a, and the vacuum suction hole 22 suctioning the battery slice a attached to the stage 1 to lock the battery slice a. During detection, the battery slice a is abutted against the flanging positioning piece 21 to finish initial positioning, and then the vacuum suction hole 22 adsorbs the battery slice a attached to the carrying platform 1 to lock the battery slice a, so that subsequent detection work is facilitated.

In a preferred embodiment of the utility model, the vacuum suction opening 22 is connected by means of a suction line 11 to an external vacuum device, which may optionally be a vacuum pump.

In a preferred embodiment of the present utility model, a locking screw 33 is provided on the slide table 32, and the locking screw 33 is screwed to fix the slide table 32 to the guide rail 31.

In a preferred embodiment of the present utility model, an end of the guide rail 31 remote from the stage 1 is opened to allow the slide table 32 to be detachably fitted on the guide rail 31, thereby facilitating the handling of the probe 5 by an operator.

In a preferred embodiment of the present utility model, the probe holder 4 is made of an insulating material to insulate the probe holes 41 from each other so as not to interfere with each other between the probes 5.

In a preferred embodiment of the present utility model, probe holes 41 are embedded with copper cores.

In a preferred embodiment of the present utility model, a part of probe holes 41 on the probe holder 4 are connected by a copper sheet 42 so that the corresponding part of probe holes 41 are electrically connected to adapt to a scene in which various detections are achieved.

In a preferred embodiment of the present utility model, the probe 5 is inserted into the probe hole 41.

In a preferred embodiment of the present utility model, the probe 5 is internally provided with a spring, and the probe 5 includes a retractable probe 5 head having elasticity. The probes 5 may be selected as semiconductor test probes 5, and in particular as PA100-G2 flat head probes 5.

It should be noted that, in the present utility model, the stage 1, the slide table 32 and the probe holder 4 all need to be insulated, and at least the portion contacting the battery slice a needs to be insulated to avoid interference with various electrical components used in the inspection.

The detection auxiliary tool can be used for measuring the overlap resistance of the main grid and the auxiliary grid of the DUP printing. The specific process is as follows:

s1, preparing a DUP printed finished battery piece, wherein the gradual change line of the auxiliary grid a2 of the finished battery piece is overlapped with the main grid a 1. Cutting the battery slice into a battery slice a sample by using a laser cutter, placing the battery slice a sample on a bearing surface of a carrier 1 of the detection auxiliary tool, abutting against a flanging positioning piece 21 for correct positioning, and opening an external vacuumizing device; the probes 5 are equidistantly inserted into the probe holes 41 of the probe frame 4, the sliding table 32 is moved to press the probes 5 on the auxiliary grid a2 of the battery slice a sample, the pressing force is adjusted, and the locking screw 33 is screwed down; the resistor at the joint of each gradual change line of the auxiliary grid a2 and the main grid a1 is recorded as a joint resistor RC of the main grid a2 and the auxiliary grid a 2;

s2, adjusting a digital voltage source meter test mode into a given current test voltage and a four-probe method by means of a digital voltage source meter;

s3, pressing the current pin in the digital voltage source meter on the copper sheet 42 for connection corresponding to the 1 st pressed probe 5, pressing the two voltage pins on the copper sheet 42 for connection corresponding to the 2 nd pressed probe 5, recording the transmission distance as L1, and recording the voltage at the moment; calculating a resistance R according to the resistance=voltage/current, and recording the resistance at the moment as R (F1-F2); wherein: the resistor R (F1-F2) is: the sum of the line resistance RB of the main gate a1 and the junction resistance 2RC of 2 pairs of gradual change lines of the auxiliary gate a2 and the main gate a1 with the length of L1;

s4, pressing the current pin in the digital voltage source meter on the copper sheet 42 for connection corresponding to the 1 st probe 5, pressing the two voltage pins on the copper sheet 42 for connection corresponding to the 3 rd probe 5 after pressing down, recording the transmission distance as L2, and recording the voltage at the moment; calculating a resistance R according to the resistance=voltage/current, and recording the resistance at the moment as R (F1-F3); wherein: the resistor R (F1-F3) is: the sum of the line resistance RB of the main gate a1 with the length of L2 and the junction resistance 2RC of the gradual change line of the auxiliary gate a2 and the main gate a1 in 2 pairs;

s5, repeating the testing steps, pressing the current pin in the digital voltage source meter on the copper sheet 42 for connection corresponding to the probe 5 after the 1 st pressing, pressing the two voltage pins on the copper sheet 42 for connection corresponding to the probe 5 after the 4 th pressing, recording the transmission distance as L3, and recording the voltage at the moment; calculating a resistance R according to the resistance=voltage/current, and recording the resistance at the moment as R (F1-F4); wherein: the resistors R (F1-F4) are: the sum of the line resistance RB of the main gate a1 with the length of L3 and the junction resistance 2RC of the gradual change line of the auxiliary gate a2 and the main gate a1 in 2 pairs;

s6, repeating the testing steps, pressing the current pin in the digital voltage source meter on the connecting copper sheet 42 corresponding to the 1 st pressed probe 5, pressing the two voltage pins on the connecting copper sheet corresponding to the 5 th pressed probe 5, recording the transmission distance as L4, and recording the voltage at the moment; calculating a resistance R according to the resistance=voltage/current, and recording the resistance at the moment as R (F1-F5); wherein: the resistors R (F1-F5) are: the sum of the line resistance RB of the main gate a1 with the length of L4 and the junction resistance 2RC of the gradual change line of the auxiliary gate a2 and the main gate a1 in 2 pairs;

s7, repeating the testing steps, pressing the current pin in the digital voltage source meter on the copper sheet 42 for connection corresponding to the probe 5 after the 1 st pressing, pressing the two voltage pins on the copper sheet 42 for connection corresponding to the probe 5 after the 6 th pressing, recording the transmission distance as L5, and recording the voltage at the moment; calculating a resistance R according to the resistance=voltage/current, and recording the resistance at the moment as R (F1-F6); wherein: the resistors R (F1-F6) are: the sum of the line resistance RB of the main gate a1 with the length of L5 and the junction resistance 2RC of the gradual change line of the auxiliary gate a2 and the main gate a1 in 2 pairs;

s8, in the embodiment, L5 is more than L4 is more than L3 is more than L2 is more than L1, and according to the principle of a transmission line model method, the influence of the resistance RB of the a1 line of the main grid on the total measured resistance is increased along with the increase of the transmission distance, namely, the resistance R (F1-F6) is more than R (F1-F2); then the corresponding resistance of the increased transmission distance can be calculated, the increased transmission distance is L5-L1, the increased resistance is R (F1-F6) -R (F1-F2), and the resistance of the transmission distance in unit length is [ R (F1-F6) -R (F1-F2) ]/[ L5-L1], and the resistivity of the main grid a1 line is [ R (F1-F6) -R (F1-F2) ]/[ L5-L1];

s9, drawing a coordinate graph according to the calculated resistance result and the transmission distance; wherein: the recorded transmission distances (L5, L4, L3, L2, L1) are taken as the abscissa, and the recorded resistance results (R (F1-Fx)) are taken as the ordinate; obtaining the relation between the transmission distance and the measured resistance; the slope of the drawn graph is the resistivity of the main grid a1 line of the battery piece, the main grid a1 line resistance RB is expressed as the main grid a1 line resistivity multiplied by the transmission distance, and the sum of 2 pairs of the auxiliary grid a2 gradual change line and the junction resistance 2RC of the main grid a1 is calculated resistance minus the main grid a1 line resistance RB. According to the principle of a transmission line model method, as the transmission distance L increases, the influence of the main grid a1 line resistance RB on the total measured resistance increases; then, the resistance corresponding to the increase of the transmission distance can be calculated; the increased transmission distance may be denoted as L5-L1 and the increased resistance as: r (F1-F6) -R (F1-F2); the resistance from which the transmission distance per unit length can be derived is expressed as: [ R (F1-F6) -R (F1-F2) ]/[ L5-L1], which is the slope of the graph; i.e. the resistivity of the main gate a1 line can be expressed as: the intercept of the drawn straight line on the Y axis is 4RC, the contact resistance of each pair of auxiliary grid a2 gradual change lines and the main grid a1 is 2RC, and the contact resistance of each pair of auxiliary grid a2 gradual change lines and the main grid a1 is RC. The above is the whole process of the test.

It should be understood that the above-described specific embodiments are only for explaining the present utility model and are not intended to limit the present utility model. Obvious variations or modifications which extend from the spirit of the present utility model are within the scope of the present utility model.

Claims

1. The utility model provides a detect auxiliary fixtures for TOP-Con battery section owner secondary grid overlap resistance's measurement, its characterized in that includes:

the carrying platform (1) is horizontally arranged and used for carrying the battery slices (a);

a positioning assembly (2), wherein the positioning assembly (2) is configured on the bearing surface of the carrying platform (1) to position the battery slice (a);

the lifting assembly (3), the lifting assembly (3) comprises a guide rail (31) vertically arranged on the carrying platform (1) and a sliding table (32) matched with the guide rail (31), and the sliding table (32) is fixedly connected with a probe frame (4);

and a probe holder (4), wherein a plurality of probe holes (41) are arranged on the probe holder (4), and probes (5) for detection are arranged in the probe holes (41).

2. The detection auxiliary tool according to claim 1, wherein the positioning assembly (2) comprises a flanging positioning member (21) and a vacuum suction hole (22), the flanging positioning member (21) is abutted by two right-angle sides of the battery slice (a) to position the battery slice (a), and the vacuum suction hole (22) adsorbs the battery slice (a) attached to the carrier (1) to lock the battery slice (a).

3. The inspection aid according to claim 2, characterized in that the vacuum suction holes (22) are connected to an external vacuum-pumping device by means of a suction pipe (11).

4. The detection auxiliary tool according to claim 1, wherein a locking screw (33) is arranged on the sliding table (32), and the locking screw (33) is screwed to fix the sliding table (32) on the guide rail (31).

5. The detection aid according to claim 1, wherein an end of the guide rail (31) remote from the carrier (1) is open to allow the slide table (32) to be detachably fitted on the guide rail (31).

6. The inspection aid according to claim 1, characterized in that the probe holder (4) is made of an insulating material to insulate the probe holes (41) from each other.

7. The auxiliary detection tool according to claim 6, wherein the probe hole (41) is internally provided with a copper core.

8. The detection auxiliary tool according to claim 7, wherein a part of the probe holes (41) on the probe frame (4) are connected through a copper sheet (42) so as to electrically connect the corresponding part of the probe holes (41).

9. The detection aid according to claim 1, wherein the probe (5) is inserted in the probe hole (41).

10. The detection aid according to claim 1, wherein a spring is arranged inside the probe (5), and the probe (5) comprises a stretchable probe (5) head having elasticity.