CN219572935U - Battery grid line position detection device, offset detection system and calibration device - Google Patents

Abstract

The utility model relates to a battery grid line position detection device, an offset detection system and a calibration device. The detection device comprises a needle row base, at least two rows of probes are arranged along the length direction of the needle row base, the adjacent two rows of probes are staggered along the width direction of the needle row base, and the probes are all used for being connected with a first polarity of a power supply; the first ends of the probes are connected with the needle bar base, the second ends of the probes extend towards a direction away from the needle bar base, and each probe is configured to automatically adjust the distance between the second ends and the needle bar base when an external force is applied to the probes; the second ends of at least two adjacent probes are configured to contact the same grid line of the battery plate along the length direction of the pin row base. By arranging the two rows of probes in staggered arrangement, the influence of the size of the probes on the detection precision can be reduced, and the resolution of the detection device can be improved; in addition, when the detection results of the two rows of probes have large difference, the detection results of the probes can be known to have deviation, and the error detection results are avoided.

Description

Battery grid line position detection device, offset detection system and calibration device

Technical Field

The utility model relates to the technical field of solar cell production, in particular to a cell grid line position detection device, an offset detection system and a calibration device.

Background

Currently, solar cells produced in the industry are square, and in practical use, rectangular cells are used to increase the power of the module, so that the produced cells need to be welded after being cut. Because the limitation of printing precision, the printing pattern is designed into a plurality of printing areas, the battery piece needs to be cut along the cutting seam, and because the size of the cutting seam is small, if grid lines on the front side and the back side of the battery piece are not aligned, the cutting problem can occur, and even the performance of the welded battery piece is affected.

Currently, AOI (Automated Optical Inspection) detection is adopted in the industry for detecting whether printed patterns on the battery piece are aligned, and the printed patterns and colors on the front side or the back side of the battery piece are tested. However, the whole surface scanning is performed, if high-precision detection is required, the test time is long, and high-frequency or each piece of detection cannot be achieved. However, if the scanning accuracy is low, the position information of the pattern cannot be accurately obtained, and the purpose of detection cannot be achieved. In the prior art, the appearance detection is single-sided detection, and after AOI (automated optical inspection) is performed on one side of the battery piece, the other side of the battery piece is measured, so that the double sides of the battery piece cannot be detected at the same time.

Disclosure of Invention

The utility model provides a battery grid line position detection device which is used for detecting the position of a grid line on the surface of a solar cell.

The second objective of the present utility model is to provide a system for detecting the shift amount of the grid line of the front and back sides of the solar cell.

The third object of the present utility model is to provide a calibration device for calibrating a battery grid line position detection device.

One of the purposes of the utility model is realized by adopting the following technical scheme:

the battery grid line position detection device comprises a needle row base, wherein at least two rows of probes are arranged along the length direction of the needle row base; along the width direction of the needle row base, two adjacent rows of probes are staggered, and the probes are connected with a first polarity of a power supply; the first ends of the probes are connected with the needle bar base, the second ends of the probes extend towards a direction away from the needle bar base, and each probe is configured to automatically adjust the distance between the second ends and the needle bar base when an external force is applied to the probe; the second ends of at least two adjacent probes are configured to contact the same grid line of a battery piece along the length direction of the pin row base.

At least two probes are used for contacting the same grid line, and the position of the grid line can be detected by detecting the position of the probe contacting the grid line. The distance between the probe and the needle row base can be automatically adjusted, so that the device can adapt to the arc-shaped surface of the grid line, and the position detection result of the grid line is more accurate. The number of the probes is two, and the adjacent two rows of probes are staggered, so that the accuracy of the detection result can be improved, the detection results of the probes in different rows can be mutually verified, and the deviation of the detection results is avoided.

Further, a spring is arranged between each probe and the needle bar base, one end of the spring is connected with the needle bar base, and the other end of the spring is connected with the probe, so that the distance between the second end and the needle bar base can be adjusted when the probe is subjected to external force.

Further, the probes in each row are equidistantly distributed according to the distance of 0.5-1 mm, and a gap of 0.2-1 mm is reserved between two adjacent probes in the same row.

Further, the probe comprises a second end for contacting the battery piece, and the end face of the second end is spherical.

The spherical structure is adopted to contact with the battery piece, so that the contact area with the battery piece is small, and the damage to the battery piece is reduced.

Further, the cross section of the second end is triangular with a chamfer, and the cross section is a cross section perpendicular to the length direction of the probe.

The second end with the triangular section is adopted, so that two rows of probes can be conveniently arranged in a staggered mode, the interval between the two rows of probes is smaller, and the accuracy of a detection result is improved.

The second purpose of the utility model is realized by adopting the following technical scheme:

the battery grid line offset detection system comprises a battery grid line offset detection device, wherein the offset detection device comprises two battery grid line position detection devices, and probes of the two position detection devices are oppositely arranged and correspond to each other in position one by one and are used for detecting the positions of grid lines at the same position on the front side and the back side of a battery piece.

The position detection device with the two probes arranged oppositely and in one-to-one correspondence to the positions can detect the positions of the grid lines on the front side and the back side of the battery piece, and whether the grid lines on the front side and the back side of the battery piece deviate can be judged by comparing the positions of the grid lines on the front side and the back side of the battery piece.

Further, the number of the offset detection devices is two, and the offset detection devices are respectively used for detecting the offset of the grid lines at the head end and the tail end of the battery piece.

The third purpose of the utility model is realized by adopting the following technical scheme:

the calibration device is used for calibrating the position detection device and comprises a table top, wherein two rows of conducting plates which are arranged in a staggered mode are distributed on the table top, the two rows of conducting plates are configured to correspond to the probes one by one, and the conducting plates are electrically connected with a second polarity of a power supply; the upper surface of the conductive sheet is flush.

Further, a gap is provided between adjacent conductive sheets.

Further, the conductive sheet is a metal structural member.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present utility model, the drawings that are needed in the embodiments of the present utility model will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present utility model and should not be considered as limiting the scope, and other related drawings can be obtained according to these drawings without inventive effort for a person skilled in the art.

Fig. 1 is a schematic diagram of a battery grid line position detection device according to an embodiment of the present utility model;

FIG. 2 is a second schematic diagram of a battery grid line position detection device according to an embodiment of the present utility model;

FIG. 3 is a schematic diagram of a staggered arrangement of probes;

FIG. 4 is a schematic diagram of a probe according to an embodiment of the present utility model;

FIG. 5 is a schematic cross-sectional view of a second end of a probe according to an embodiment of the present utility model;

fig. 6 is a schematic structural diagram of a calibration device according to an embodiment of the present utility model.

Icon: 1000-battery grid line position detection device; 1100-needle row base; 1110-probe; 1111-a first end; 1112-a second end; 1113-flange; 1120—a spring; 2000-battery pieces; 2100-gate line; 3000-calibration means; 3100—a table top; 3200-conductive sheets; 4000-positioning structure.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present utility model more clear, the technical solutions of the embodiments of the present utility model will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present utility model. It will be apparent that the described embodiments are some, but not all, embodiments of the utility model. The components of the embodiments of the present utility model generally described and illustrated in the figures herein may be arranged and designed in a wide variety of different configurations.

In the description of the present utility model, it should be noted that, the azimuth or positional relationship indicated by the terms "inner", "outer", etc. are based on the azimuth or positional relationship shown in the drawings, or the azimuth or positional relationship that is commonly put in use of the product of this application, are merely for convenience of describing the present utility model and simplifying the description, and do not indicate or imply that the device or element to be referred to must have a specific azimuth, be configured and operated in a specific azimuth, and therefore should not be construed as limiting the present utility model. Furthermore, the terms "first," "second," and the like, are used merely to distinguish between descriptions and should not be construed as indicating or implying relative importance.

In the description of the present utility model, it should also be noted that, unless explicitly specified and limited otherwise, the terms "disposed", "connected" and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected or integrally connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present utility model will be understood in specific cases by those of ordinary skill in the art.

Currently, an AOI detection method is adopted in the industry to detect whether the grid lines 2100 on the front and the back of the battery sheet 2000 are aligned, so that the detection time is long, and therefore, the inventor of the present utility model proposes a battery grid line offset detection system, which comprises a battery grid line offset detection device, wherein the battery grid line offset detection device comprises two battery grid line position detection devices 1000 which are oppositely arranged, and the two battery grid line position detection devices 1000 are respectively used for detecting the positions of the grid lines 2100 on the front and the back of the battery sheet 2000 at the same position, and judging whether the positions of the grid lines 2100 on the front and the back of the battery sheet 2000 deviate or not according to the detection result, and the value of the deviation.

Because the two ends of the battery plate 2000 can be welded, as shown in fig. 2, the battery grid line offset detection system provided by the utility model can include two battery grid line offset detection devices, which are respectively used for detecting whether the grid lines 2100 on the front and the back at the positions of the two ends of the battery plate 2000 have the position offset. In some embodiments, as shown in fig. 1, a positioning structure 4000 is further provided in the battery grid line offset detection system for positioning the battery plate 2000, so as to place the battery plate 2000 when the detection is performed.

As shown in fig. 1 and 3, the battery grid line position detecting device 1000 includes a row-of-pins base 1100, two rows of probes 1110 having the same number are disposed along the length direction of the row-of-pins base 1100, the probes 1110 are vertically disposed on the surface of the row-of-pins base 1100, a first end 1111 of each probe 1110 is connected to the row-of-pins base 1100, a second end 1112 extends away from the row-of-pins base 1100, and a second end 1112 of each probe 1110 is used for contacting the grid line 2100 on the battery plate 2000. The second ends 1112 of at least two adjacent probes 1110 are configured to contact the same grid 2100 of the battery plate 2000 in the length direction of the pin header base 1100, i.e., the spacing between the axes of at least two probes 1110 in the same column of probes 1110 is less than the width of the grid 2100; when the battery grid line position detecting device 1000 detects the position of the grid line 2100, at least two probes 1110 simultaneously contact the same grid line 2100. For example, when the width of the gate line 2100 is 1 to 4mm, the probes 1110 in the same row may be equally spaced at a pitch ranging from 0.5 to 1mm, and the gap between the two probes 1110 in the same row may be controlled to be within a range from 0.2 to 1mm

As shown in fig. 3, two rows of probes 1110 are staggered in the width direction of the pin array base 1100 (not shown in the figure) to improve the accuracy of measurement data. Preferably, as shown in fig. 3 and 5, the first end 1111 of the probe 1110 has a cross-section of a triangle with a chamfer, which is a cross-section perpendicular to the length direction of the probe 1110; the stylets 1110 employing such a structure can make the staggered arrangement between the stylets 1110 more compact to save space.

In some embodiments, more than two columns of staggered probes 1110 may be used to further improve the accuracy of the test results.

In the battery cell line shift amount detecting device, the positions of the probes 1110 in two battery cell line position detecting devices 1000 are in one-to-one correspondence, that is, for all the probes 1110 in one battery cell line position detecting device 1000, there are probes 1110 in the other battery cell line position detecting device 1000 whose axes coincide with each other.

The detection principle of the battery grid line offset detection device provided by the utility model is as follows:

the probes 1110 in the battery cell position detection device 1000 are all connected to a first polarity of the power supply, and the gate 2100 on the surface of the battery chip 2000 is connected to a second polarity of the power supply. The battery grid line position detecting apparatus 1000, which is disposed opposite to each other, is moved toward the battery plate 2000 in a direction perpendicular to the plane of the battery plate 2000, during which current passes through the probes 1110 in contact with the grid lines 2100, while no current passes through the probes 1110 in contact with the areas of the surface of the battery plate 2000 other than the grid lines 2100. If the positions of the probes 1110 through which current passes in the two battery grid line position detection devices 1000 of the same group of battery grid line position detection devices 1000 do not correspond, the grid lines 2100 on the front and back sides of the detected battery sheet 2000 have a positional deviation. Compared with the prior art, the speed of detecting whether the grid line positions on the front side and the back side of the battery piece 2000 have deviation or not by adopting the battery grid line position detection device provided by the utility model is faster.

Since the surface of the grid line 2100 may be curved, in order to allow the second ends 1112 of all the probes 1110 located directly above the grid line 2100 to contact the grid line 2100, in an embodiment of the present utility model, each probe 1110 is configured to automatically adjust the distance between the second ends 1112 and the row-of-pins base 1100 when an external force is applied. The specific principle is that in the process of moving the battery grid line position detecting device 1000 to the battery plate 2000, the distance between the second end 1112 of the probe 1110 that firstly contacts the grid line 2100 and the pin row base 1100 is reduced, and other probes 1110 that are not in contact with the grid line 2100 continue to move to the battery plate 2000 until the probes 1110 contact the grid line 2100 or the battery plate 2000.

The above principle can be implemented by using a spring 1120 to connect the probe 1110 with the needle bank base 1100. Specifically, the first end 1111 of the stylet 1110 is slidably coupled to the needle bar base 1100 in a direction that is the length of the stylet 1110. Spring 1120 is compressed when not in operation, and under the action of spring 1120, probe 1110 is extended, so that it is possible to prevent probe 1110 from being unable to contact grid line 2100 due to failure to extend, and thus to prevent deviation in the position measurement result of grid line 2100.

When the probe 1110 contacts the grid line 2100 during the lowering of the battery grid line position detecting device 1000 in a plane perpendicular to the battery plate 2000, a relative sliding motion occurs between the probe 1110 and the pin header base 1100, the first end 1111 of the probe 1110 slides into the pin header base 1100, and the probe 1110 protrudes under the action of the spring 1120 during the upward removal of the battery grid line position detecting device 1000.

And the spring 1120 in a compressed state is used to connect the probe 1110 and the needle bar base 1100, so that the second end 1112 of the probe 1110 extends to a limit position, and the battery grid line position detecting device 1000 can be placed below the battery plate 2000 to detect the position of the grid line 2100 on the back of the battery plate 2000.

Illustratively, as shown in FIG. 4, the spring 1120 is sleeved on the first end 1111 of the probe 1110, and a flange 1113 is also disposed on the first end 1111 of the probe 1110, one of the flanges 1113 being adapted to contact the spring 1120 to enable the spring 1120 to apply a force to the probe 1110; the second purpose of flange 1113 is to contact the needle bar base 1100 and limit the distance between the probe 1110 and the needle bar base 1100.

In some embodiments, as shown in fig. 4, the end surface of the second end 1112 of the probe 1110 is spherical, and the spherical surface is used to contact the battery plate 2000, so that the contact area is small, and damage of the probe 1110 to the surface of the battery plate 2000 can be reduced.

Because the probe 1110 in the battery grid line position detecting device 1000 provided by the utility model is small in size, after a period of use, the distance between the second end 1112 of the probe 1110 and the row of pins 1100 may be inconsistent due to deformation of the probe 1110, and in the detecting process, the detection result may be deviated due to insufficient extension length of the second end 1112 of the part of the probe 1110 and cannot contact with the grid line 2100 of the battery plate 2000. Based on this, the inventors of the present utility model also provide a calibration device 3000. As shown in fig. 6, the calibration device 3000 includes a table 3100 and two rows of conductive pieces 3200 provided on the table 3100, and the two rows of conductive pieces 3200 are provided in one-to-one correspondence with probes 1110 in the battery grid position detection device 1000. The top surfaces of the two rows of conductive strips 3200 are flush with each other.

When the calibration device 3000 provided by the present utility model is used to detect the probes 1110 having a failure in the battery gate line position detection device 1000, all the probes 1110 are connected to the first polarity of the power supply, and all the conductive tabs 3200 are connected to the second polarity of the power supply. Then the battery grid line position detection device 1000 is put down from the upper part of the table top 3100, whether the extension length of the probe 1110 is too long or too short can be judged by detecting the sequence of the current in the probe 1110, and then the corresponding probe 1110 is adjusted.

It should be noted that the features of the embodiments of the present utility model may be combined with each other without conflict.

The above description is only of the preferred embodiments of the present utility model and is not intended to limit the present utility model, but various modifications and variations can be made to the present utility model by those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present utility model should be included in the protection scope of the present utility model.

Claims (10)

1. The battery grid line position detection device is characterized by comprising a needle row base, wherein at least two rows of probes are arranged along the length direction of the needle row base; along the width direction of the needle row base, two adjacent rows of probes are staggered, and the probes are connected with a first polarity of a power supply; the first ends of the probes are connected with the needle bar base, the second ends of the probes extend towards a direction away from the needle bar base, and each probe is configured to automatically adjust the distance between the second ends and the needle bar base when an external force is applied to the probe; the second ends of at least two adjacent probes are configured to contact the same grid line of a battery piece along the length direction of the pin row base.

2. The battery grid line position detecting device according to claim 1, wherein a spring is arranged between each probe and the needle bar base, one end of the spring is connected with the needle bar base, and the other end of the spring is connected with the probe, so that the distance between the second end and the needle bar base can be adjusted when the probe is subjected to external force.

3. The battery grid line position detecting device according to claim 1, wherein the probes in each row are equidistantly distributed at a distance of 0.5-1 mm, and a gap of 0.2-1 mm is formed between two adjacent probes in the same row.

4. The battery grid line position detecting device according to claim 1, wherein the end face of the second end is a spherical surface.

5. The battery grid line position detecting device according to claim 1, wherein the cross section of the second end is a triangle with a chamfer, and the cross section is a cross section perpendicular to the length direction of the probe.

6. The battery grid line offset detection system is characterized by comprising a battery grid line offset detection device, wherein the battery grid line offset detection device comprises two battery grid line position detection devices according to any one of claims 1-5, and probes of the two position detection devices are oppositely arranged and correspond to each other in position one by one and are used for detecting positions of grid lines at the same position on the front side and the back side of a battery piece.

7. The system for detecting the offset of the battery grid line according to claim 6, wherein the number of the battery grid line offset detecting devices is two, and the battery grid line offset detecting devices are respectively used for detecting the offset of the grid lines at the head end and the tail end of the battery piece.

8. A calibration device for calibrating the position detection device according to any one of claims 1 to 5, comprising a table surface, wherein two rows of conducting strips are distributed on the table surface, the conducting strips are arranged in a staggered manner, the conducting strips are configured to correspond to the probes one by one, and the conducting strips are electrically connected with a second polarity of a power supply; the upper surface of the conductive sheet is flush.

9. A calibration device according to claim 8, wherein there is a gap between adjacent ones of the conductive strips.

10. The alignment device of claim 8, wherein the conductive sheet is a metallic structural member.