A method for positioning stacked sheets of solar cell modules

Abstract

A method for positioning stacking of solar cell modules, the steps include: obtaining the width value D of any pad point on the front of any battery strip; capturing the position parameter P0 of a group of conductive glue on the back of the battery strip to be connected that has been placed on a connection platform; obtaining the position parameter P2 of the battery strip placed on a loading platform to be grasped in the grasping member when it is grasped by the grasping member; based on the width value D of the pad point on the front of the battery strip, the position parameter P0 of the conductive glue on the back of the battery strip to be connected, and the position parameter P2 of the battery strip to be grasped in the grasping member, the position parameter P3 of the battery strip to be grasped and the battery strip to be connected placed on the connection platform for stacking can be obtained. The stacking positioning method of the present invention increases the positioning of the pad point position in the two battery strips to be connected, so as to accurately calculate the bonding position of the two stacked battery strips, thereby improving the accuracy of the battery strip stacking welding and ensuring the stacking quality.

Description

Technical Field

[0001] The invention belongs to the technical field of photovoltaic component lamination, and in particular relates to a method for positioning solar cell component lamination. Background Art

[0002] In the photovoltaic module process, the connection of two cell strips is the most critical step in the stacking of modules. Once there is a problem with the spacing of any set of stacks, the size of all subsequent stacks will be inaccurate, directly causing the entire module to be scrapped. Therefore, how to control the stacking positioning of the cell strips is the primary condition for controlling the connection of the cell strips, and it is also the basis for ensuring the stacking accuracy of the stacking module. Summary of the invention

[0003] The invention provides a method for positioning stacking sheets of a solar cell assembly, which solves the technical problems of low stacking precision and large error of battery strips in the prior art.

[0004] In order to solve the above technical problems, the technical solution adopted by the present invention is:

[0005] A method for positioning stacked sheets of a solar cell assembly, comprising the steps of:

[0006] Get the width value D of any pad point on the front of any battery bar;

[0007] Capturing the position parameter P0 of a group of conductive glues on the back of the battery strip to be connected which has been placed on the connection platform;

[0008] Obtaining a position parameter P2 of the battery bar to be grasped placed on the loading platform when being grasped by the grasping member;

[0009] Based on the pad point width value D on the front side of the battery bar, the position parameter P0 of the conductive glue on the back side of the battery bar to be connected, and the position parameter P2 of the battery bar to be grasped in the grasping member, the position parameter P3 for placing the battery bar to be grasped and the battery bar to be connected for stacking on the connecting table can be obtained.

[0010] Furthermore, before grabbing the battery bar, the method further includes inspecting the battery bar to be grabbed for defects, the steps comprising:

[0011] Positioning the battery strip to be grasped at two corners along the length of the battery strip to be grasped and based on the angle of any right-angled side on the same side;

[0012] Then, the battery strip to be grasped is inspected for defects along the length of the battery strip to be grasped.

[0013] Furthermore, the defect inspection of the battery strip to be grasped includes: whether there is edge collapse at the outer edge, the orientation position of the conductive adhesive on the back side, and whether there is conductive adhesive.

[0014] Furthermore, when inspecting the defects of the battery bar to be grasped, it also includes obtaining the position parameter P1 of the battery bar to be grasped on the loading platform; and transmitting the position parameter P1 of the battery bar to be grasped to the grasping member.

[0015] Furthermore, the loading platform on which the battery bars to be grabbed are placed and the connecting platform on which the battery bars to be connected are placed vertically and in different positions.

[0016] Furthermore, the battery bar to be grasped placed on the loading platform is grasped by the grasping member, and is arranged in parallel with the battery bar to be connected after being rotated by a certain angle, and the front pad point in the battery bar to be grasped and the back conductive glue in the battery bar to be connected are arranged correspondingly up and down.

[0017] Furthermore, the gripping member is used to control the battery bar to be gripped by adsorption through a suction cup.

[0018] Furthermore, the position parameter P0 of the conductive adhesive on the back of the battery bar to be connected, the position parameter P2 of the battery bar to be grasped in the grasping member, the position parameter P3 of the battery bar to be grasped and the battery bar to be connected for stacking on the connecting table, and the position parameter P1 of the battery bar to be grasped on the loading table all include: the values ​​of the X-axis and Y-axis of the measured position of the battery bar in the horizontal plane, and the offset angle of its reference angle relative to the center of the circle in the horizontal plane.

[0019] Furthermore, the front side of the battery bar to be connected and the front side of the battery bar to be grasped are both arranged to face downward.

[0020] Furthermore, one end of the conductive glue placed on the loading platform where the battery strip is to be grabbed is arranged close to one side of the battery strip to be connected, and moves along the transmission direction of the loading platform.

[0021] By adopting the stacking positioning method designed in the present invention, by increasing the monitoring of the pad point positions in the two battery bars, the battery bars to be connected placed on the connecting table, the battery bars to be grasped placed on the loading table, and the position positioning parameters of the grasping parts used to grasp the battery bars to be grasped on the loading table, the system can automatically and accurately calculate the stacking bonding positions of the battery bars to be connected and the battery bars to be grasped on the connecting table, so as to improve the accuracy of the battery bar stacking welding and ensure the stacking quality. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 is a flow chart of a method for positioning stacked sheets of a solar cell assembly in one embodiment of the present invention;

[0023] Figure 2is a schematic structural diagram of a solar cell module stacking positioning system in one embodiment of the present invention;

[0024] Figure 3 is an enlarged view of part A in one embodiment of the present invention;

[0025] Figure 4 It is a schematic diagram of the two corner positioning structure of the second camera to the second battery strip in one embodiment of the present invention.

[0026] In the figure:

[0027] 10. Battery bar 1 20. Battery bar 2 30. Connection station

[0028] 40, loading table 50, camera 1 60, camera 2

[0029] 70, Camera 3 80, Camera 4 90, Grab 1

[0030] 100. Grab the part 2 110. Test production line DETAILED DESCRIPTION

[0031] The present invention is described in detail below with reference to the accompanying drawings and specific embodiments.

[0032] This embodiment provides a method for positioning stacked sheets of a solar cell assembly. Figure 1 and Figure 2 As shown, the steps include:

[0033] S1. Get the width value D of any pad point on the front of any battery bar.

[0034] All battery strips are cut uniformly from battery sheets, and before lamination, the size of the pad point on the front of each battery strip must be detected and its width value D recorded. The width value D of the pad point on the front of the battery strip is located in the battery strip as shown in the figure. Figure 3 In the actual detection process, the width value D of the front pad point in the battery strip is automatically screened on the automatic detection production line 110, and the front pad point in the battery strip is detected by the camera 280 set on the automatic detection production line 110, as shown in FIG. Figure 2As shown, on the automatic inspection production line 110, the front of the battery strip is set upward, and accordingly, the pad point on its front is directly radiated and photographed by the camera four 80, so that the width value D of the pad point on the front of the battery strip can be automatically detected. The width value D of the pad point on the front of all battery strips must meet the standard size range, because its width value D is consistent, so it is only necessary to take the width value D of the pad point at any position on the front of any battery strip. Then the camera four 80 transmits the measured width value D to the preset program in the controller of the welding machine, and the system automatically receives and stores the width value D. Among them, the controller of the welding machine is a commonly used PLC controller, which is a commonly used accessory in this field and is omitted in the drawings.

[0035] S2, capturing the position parameters P0 of a group of conductive adhesives on the back of the battery strip 10 to be connected which has been placed on the connection platform.

[0036] After measurement, the battery strip is flipped 180° on the automatic inspection production line 110 by the automatic robot arm grasping part 90, so that the back of the battery strip 10 is placed on the connecting table 30 facing upwards, and the width of the battery strip 10 is placed along the width of the connecting table 30, and the position of the conductive glue on the back of the battery strip 10 is located close to the loading table 40 where the battery strip 20 welded to the battery strip 10 is placed. After the battery bar 10 is stably placed on the placement position in the connection platform 30, the camera 3 70 located directly above it monitors the position parameter P0 of a row of conductive glue on the back of the battery bar 10. The conductive glue on the back of the battery bar 10 is arranged close to the output end of the battery bar 10 and arranged in the same row along the length direction of the battery bar 10. According to the placement position of the battery bar 10, the right angle of one end of the length direction of the battery bar 10 is used as a reference and set as the X-axis and Y-axis, that is, the output end of the battery bar 10, that is, the lower edge of the battery bar 10 is used as the X-axis, and the side of the end is used as the Y-axis. Then, a right angle of the battery bar 10 coincides with the circle of the coordinate axis, thereby obtaining the X value, Y value and angle θ of a group of outermost conductive glue on the back of the battery bar 10 relative to the horizontal X-axis. Accordingly, the position parameter P0 of a group of outermost conductive glue on the back of the battery bar 10 is (X0, Y0, θ0). Since the lower edge of the battery bar 10 is arranged flush with the X-axis, its θ0 value is 0 accordingly.

[0037] S3 , performing defect inspection on the second battery strip 10 to be grasped, and obtaining the position parameter P1 of the second battery strip 10 placed on the loading platform 40 .

[0038] like Figure 1As shown, the loading platform 40 on which the battery strip 20 to be caught is placed and the connecting platform 30 on which the battery strip 10 to be connected is placed vertically and dysplaced, wherein the battery strip 20 in the loading platform 40 is also a battery strip that flows down from the automatic inspection production line 110. The moving direction of the battery strip 20 in the loading platform 40 is set along the transmission direction on the loading platform 40 toward the side close to the connecting platform 30, and stops near the connecting platform 30. On the loading platform 40, the back of the battery strip 20 is set upward, and the length of the battery strip 20 is set along the width direction of the loading platform 40. Before the battery strip 20 is stationary, it is also necessary to inspect its appearance on the loading platform 40 through a camera 1 50 set just above the battery strip 20 to check its surface quality defects.

[0039] The end of the conductive adhesive of the battery strip 20 to be grasped placed on the loading platform 40 is arranged close to the side of the battery strip 10 to be connected, and moves along the transmission direction of the loading platform 40. The battery strip 10 to be connected placed on the connection platform 30 is the same as the battery strip 20 to be grasped, and both are arranged with the front side facing downward.

[0040] Before checking for defects, it is necessary to first locate the two corners of the battery bar 20 along the length of the battery bar 20 and based on the angle of any right-angled side on the same side. Then, along the length direction of the battery bar 20, the surface of the battery bar 20 is inspected for defects. The defects mainly include: whether the outer edge of the battery bar 20 is broken, the orientation and position of the conductive glue on the back, and whether the conductive glue on the back is missing.

[0041] When checking the quality defects of the battery strip 20, the position parameter P1 of the battery strip 20 placed on the loading platform 40 is obtained through the camera 1 50, that is, the captured position parameter P1, and the captured position parameter P1 of the battery strip 20 is transmitted to the capture device 2 100. Among them, the position parameter P1 of the battery strip 20 relative to the X-axis and Y-axis in the connecting platform 30 is (X1, Y1, θ0), wherein since the loading platform 40 and the connecting platform 30 are vertically arranged, and the conductive glue on the back of the battery strip 20 placed on the loading platform 40 is arranged close to the side of the connecting platform 30, that is, the conductive glue on the back of the battery strip 20 is arranged in the forward direction of the moving direction of the loading platform 40, if it is stacked and connected with the battery strip 10, it must be rotated 270° to be completely stacked with the battery strip 10 in the same direction up and down, so the angle θ0 of the length direction of the battery strip 20 relative to the X-axis and Y-axis on which the battery strip 10 is placed is 270°.

[0042] S4, obtaining the position parameter P2 of the battery strip 20 to be grasped placed on the loading platform 40 when it is grasped by the grasping device 2 100 .

[0043] The gripper 100 is used to control the battery strip 20 to be gripped by the suction cup. That is, the gripper 100 used to grip the battery strip 20 is an automatic robot arm, and a suction cup is provided at its gripping end. The battery strip 20 is adsorbed on the suction cup by vacuum adsorption. This is a common structure in the art. A camera 60 is also provided on the suction cup. The camera 60 is used to locate the position P2 of the battery strip 20 on the gripper 100. The camera 60 is positioned by locating the two corners of the battery strip 20. Its structure is as follows: Figure 4 As shown, based on the sides of the two ends of the battery strip 20, a set of symmetrically set obtuse angles of 120° are provided, and the connecting line of the two obtuse angles overlaps with the center line of the width direction of the battery strip 20, so that the battery strip 20 is completely aligned with the suction cup in the grabbing member 100. Before grabbing the battery strip 20, the suction cup is suspended in its initial position, and the position parameter P2 of the projection of the suction cup in the loading platform 40 relative to the reference plane of the X-axis and Y-axis on the connecting platform 30 is (X2, Y2, θ2). The method of obtaining the position parameter P1 of the battery strip 20 in the loading platform 40 is the same as that of obtaining the value of the adsorption position parameter P2 of the battery strip 20 positioned by the grabbing member 100 on the grabbing member 100 is (X2, Y2, θ2). At this time, the angle θ0 of the length direction of the battery strip 20 in the grabbing member 100 relative to the X-axis and Y-axis on which the battery strip 10 is placed is 90°.

[0044] S5. The system automatically calculates and obtains the position parameter P3 for placing the second battery strip 20 to be grasped and the first battery strip 10 to be connected on the connecting table 30 for stacking.

[0045] When the controller in the welding machine obtains the pad point width value D on the front side of the battery bar from camera four 80, obtains the position parameter P0 of the conductive glue on the back side of the battery bar one 10 to be connected from camera three 70, and obtains the position parameter P2 of the battery bar two 20 to be grasped in the grasping part two 100 from camera two 60, the self-set program stored in the controller system can calculate the position parameter P3 (X3, Y3, θ3) for placing the battery bar two 20 to be grasped and the battery bar one 10 to be connected on the connecting table 30 for stacking based on the pad point width value D on the front side of the battery bar, the position parameter P0 of the conductive glue on the back side of the battery bar one 10 to be connected, and the position parameter P2 of the battery bar two 20 to be grasped in the grasping part two 100. Thereby, the grabbing piece 100 can be precisely controlled to rotate from position P1 to position P3 after a certain angle, that is, the battery bar 20 to be grabbed placed on the loading platform 40 is grabbed by the grabbing piece 100, and then rotated to a certain angle to be arranged in parallel with the battery bar 10 to be connected, and the front pad point set downward in the battery bar 20 to be grabbed and the back conductive glue set upward in the battery bar 10 to be connected are arranged correspondingly up and down, and the grabbing piece 100 then drives the battery bar 20 to slowly move downward to stack with the battery bar 10, thereby completing the stacking positioning work of the two battery bars, and welding is performed after the stacking is placed.

[0046] During the whole process, the position parameter P0 of the conductive adhesive on the back of the battery bar 10 to be connected, the position parameter P2 of the battery bar 20 to be grasped in the grasping piece 100, the position parameter P3 of the battery bar 20 to be grasped and the battery bar 10 to be connected placed on the connecting table 30 for stacking, and the position parameter P1 of the battery bar 20 to be grasped placed on the loading table 40 all include: the values ​​of the X-axis and Y-axis of the measured position of the battery bar in the horizontal plane, and the offset angle of its reference angle relative to the center of the circle in the horizontal plane.

[0047] By adopting the stacking positioning method designed in the present invention, by increasing the monitoring of the pad point positions in the two battery bars, the battery bars to be connected placed on the connecting table, the battery bars to be grasped placed on the loading table, and the position positioning parameters of the grasping parts used to grasp the battery bars to be grasped on the loading table, the system can automatically and accurately calculate the stacking bonding positions of the battery bars to be connected and the battery bars to be grasped on the connecting table, so as to improve the accuracy of the battery bar stacking welding and ensure the stacking quality.

[0048] The above embodiments of the present invention are described in detail, and the contents are only preferred embodiments of the present invention, and cannot be considered to limit the scope of implementation of the present invention. All equivalent changes and improvements made according to the scope of application of the present invention should still fall within the scope of the patent coverage of the present invention.

Claims

1. A method for positioning stacked sheets of a solar cell module, characterized in that the steps include: Get the width value D of any pad point on the front of any battery bar; Capturing the position parameter P0 of a group of conductive glues on the back of the battery strip to be connected which has been placed on the connection platform; Obtaining a position parameter P2 of the battery bar to be grasped placed on the loading platform when being grasped by the grasping member; Based on the pad point width value D of the front side of the battery bar, the position parameter P0 of the conductive glue on the back side of the battery bar to be connected, and the position parameter P2 of the battery bar to be grabbed in the grabbing member, the position parameter P3 of placing the battery bar to be grabbed and the battery bar to be connected for lamination on the connecting table can be obtained; After the battery bar to be grasped on the loading table is grasped by the grasping member, it is rotated at a certain angle and arranged in parallel with the battery bar to be connected, and the front pad point arranged downward in the battery bar to be grasped and the back conductive glue arranged upward in the battery bar to be connected are arranged in correspondence with each other up and down, and the grasping member drives the battery bar to be grasped to slowly stack downward with the battery bar to be connected, thereby completing the stacking positioning work of the two battery bars.

2. A method for positioning stacked sheets of a solar cell assembly according to claim 1, characterized in that: Before grabbing the battery bar, the battery bar to be grabbed is inspected for defects, the steps comprising: Positioning the battery strip to be grasped at two corners along the length of the battery strip to be grasped and based on the angle of any right-angled side on the same side; Then, the battery strip to be grasped is inspected for defects along the length of the battery strip to be grasped.

3. A method for positioning stacked sheets of a solar cell assembly according to claim 2, characterized in that: The defect inspection of the battery strip to be grasped includes: whether the outer edge is broken, the orientation position of the conductive glue on the back side, and whether there is conductive glue.

4. A method for positioning stacked sheets of a solar cell assembly according to claim 2 or 3, characterized in that: When inspecting the defects of the battery bar to be grasped, the method further includes obtaining a position parameter P1 of the battery bar to be grasped on the loading platform; and transmitting the position parameter P1 of the battery bar to be grasped to the grasping member.

5. A method for positioning stacked sheets of a solar cell assembly according to claim 4, characterized in that: The loading platform for placing the battery strips to be grabbed and the connecting platform for placing the battery strips to be connected are vertically and dyslocated.

6. A method for positioning stacked sheets of a solar cell assembly according to claim 5, characterized in that: The battery bar to be grasped placed on the loading platform is grasped by the grasping member, and is arranged in parallel with the battery bar to be connected after being rotated by a certain angle, and the front pad point in the battery bar to be grasped and the back conductive glue in the battery bar to be connected are arranged correspondingly up and down.

7. A method for positioning stacked sheets of a solar cell assembly according to claim 5 or 6, characterized in that: The gripping member is used to control the battery strip to be gripped by adsorption through a suction cup.

8. A method for positioning stacked sheets of a solar cell assembly according to claim 7, characterized in that: The position parameter P0 of the conductive adhesive on the back of the battery bar to be connected, the position parameter P2 of the battery bar to be grasped in the grasping member, the position parameter P3 of placing the battery bar to be grasped and the battery bar to be connected for stacking on the connecting table, and the position parameter P1 of placing the battery bar to be grasped on the loading table all include: the values ​​of the X-axis and Y-axis of the measured position of the battery bar in the horizontal plane, and the offset angle of its reference angle relative to the center of the circle in the horizontal plane.

9. A method for positioning stacked sheets of a solar cell assembly according to any one of claims 1-3, 5-6, and 8, characterized in that: The front side of the battery strip to be connected and the front side of the battery strip to be grasped are both arranged downward.

10. A method for positioning stacked sheets of a solar cell assembly according to claim 9, characterized in that: The end of the conductive glue to be used to grab the battery strip placed on the loading platform is arranged close to one side of the battery strip to be connected, and moves along the transmission direction of the loading platform.

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