Battery string preparation, detection and typesetting method

Abstract

A cell string preparation, detection and typesetting method belongs to the field of solar cell preparation, and is characterized by comprising the following steps: preparing an A group of cell strings and a B group of cell strings through an AB double-track series welding machine; the battery string is transmitted into a string detection and typesetting integrated device, appearance and quality detection is conducted on the battery string in the transmitting process, and a detection result is fed back to a string welding machine; adjusting the subsequent battery string making logic according to the feedback result; and the detection and typesetting of the battery string are completed through the string detection and typesetting integrated equipment. The series detection and typesetting functions of the battery strings are combined on the series detection and typesetting integrated equipment, meanwhile, the series welding machine can produce the battery strings according to feedback requirements, cache strings can be consumed in time, and the situation that the cache strings are overstocked too much is avoided. Meanwhile, the number of carrying times of the battery strings is reduced through the improvement of the structure, battery string abnormity caused by carrying is reduced, and the product yield is improved; and meanwhile, the occupied area of the equipment is saved, the transmission frequency and distance are shortened by improving the system cooperation performance, and the battery string arc is reduced.

Description

Technical Field

[0001] This invention belongs to the field of solar cell manufacturing, and particularly relates to a method for preparing, testing and arranging cell strings. Background Technology

[0002] In the manufacturing process of photovoltaic modules, the preparation, testing, and arrangement of cell strings are the core links that determine the quality and performance of the modules. Traditional processes usually separate testing, such as electrical performance testing, microcrack detection, and appearance defect identification, from arrangement into independent processes, which are completed by testing equipment and arrangement machines respectively. Moreover, the production results cannot be fed back to the stringer, especially when preparing different sets of cell strings, it is impossible to guide the stringer to make the appropriate strings.

[0003] As photovoltaic technology rapidly iterates towards larger sizes, thinner profiles, and higher precision, such as multi-busbar and busbarless designs, the existing processes for preparing, inspecting, and arranging battery strings have revealed the following technical problems: 1) String welding machines cannot produce strings based on inspection and arrangement results, leading to excessive backlog of buffered strings and affecting production efficiency; 2) Process fragmentation results in efficiency and yield losses. Inspection and arrangement are handled by two separate machines, requiring secondary loading, unloading, and transfer of battery cells after inspection. This not only extends the production cycle but also easily causes microcracks and electrode scratches in the battery cells during handling, especially affecting thin-film modules; 3) Equipment redundancy and excessive floor space. Independent inspection and arrangement machines require separate vision systems, robotic arms, and control systems, resulting in a significant increase in equipment floor space and poor multi-system coordination; 4) Due to the increased number of battery string transfers and distances, the arc of the battery strings is significantly increased. Summary of the Invention

[0004] This invention aims to solve the above problems and provides a method for the preparation, testing, and layout of battery strings that can realize closed-loop control of the entire process of "detection-analysis-layout-feedback-string production" of photovoltaic modules.

[0005] The battery string preparation, testing, and arrangement method of the present invention includes the following steps: Step S1: The AB dual-rail string welding machine produces two sets of battery strings, A and B; Step S2: The aforementioned battery string is fed into the integrated string inspection and layout equipment. During the feeding process, the appearance and battery quality of the battery string are inspected, and the inspection results are fed back to the string welding machine. Step S3: The stringer adjusts the stringing logic of subsequent battery strings based on the feedback results; Step S4: The aforementioned battery strings are inspected and arranged by the integrated string inspection and layout equipment.

[0006] Furthermore, the battery string preparation, testing, and layout method of the present invention is characterized in that: the integrated string testing and layout equipment is provided with a glass and positive film stacking component positioning area, a stepping transmission area, a string placement completion area, a battery string position positioning area, a string buffer area, and a string rework area; a precise string placement area is provided within the stepping transmission area; The glass and positive film stacking component positioning area is used to position the glass and positive film stacking component; The stepping transmission area is used to perform stepping displacement of the glass carrying the positive film and the battery string during the stringing process; The precise stringing area is used for placing battery strings on glass and positive film stacking components; The string arrangement completion area is used to store the glass positive film and battery string that have been arranged. The battery string positioning area is used to position the battery strings transmitted from the string welding machine. The string buffer area is used to store the battery strings that need to be buffered, which are delivered by the string welding machine; The rework area is used to store defective battery strings; The glass and positive film stacking component positioning area, stepping transmission area, string arrangement completion area, battery string position positioning area, string buffer area and string rework area are set on the same plane or different planes according to the specific application scenario to complete the corresponding battery string preparation, testing and layout process.

[0007] Furthermore, in the battery string preparation, testing, and layout method of the present invention, the integrated string inspection and layout equipment is configured with two layers, namely an upper layer and a lower layer; the positioning area of ​​the glass and positive film stacking component, the stepping transmission area, and the string placement completion area are located on the upper layer; the battery string position positioning area, the string buffer area, and the string rework area are located on the lower layer. By configuring the integrated string inspection and layout equipment with two layers, space can be rationally utilized while completing the entire battery string preparation, testing, and layout process, effectively reducing the equipment's footprint.

[0008] Furthermore, in the battery string preparation, testing and layout method of the present invention, the glass and positive film stacked component have a first state, a second state and a third state in the step transmission area; In the first state, there are no battery strings above the glass and positive film stack. The glass and stack move forward until the position where the first set of battery strings needs to be placed coincides with the position of the precise placement area, so as to place the first set of battery strings. In the second state, there are battery strings above the glass and positive film stack and there is a battery string placement position. The glass and stack move forward to the position where the battery strings need to be placed, which is adjacent to the already placed battery strings, and this position coincides with the precise placement area position, so as to place the adjacent set of battery strings. In the third state, there is a battery string above the glass and positive film stack and no string placement position. The string placement is completed, the glass and stack move forward and exit the step transmission area, and at the same time the next set of glass and positive film stacks enters the aforementioned first state.

[0009] Furthermore, in the battery string preparation, testing, and arrangement method of the present invention, step S2 includes: Step S21: Position the glass and positive film stack and transfer them to the stepping transport area; Step S22: Perform appearance and battery quality inspection on the battery string; if both inspections are qualified, move the battery string to the battery string positioning area for positioning, and then move it to the precise string placement area of ​​the stepping transmission area for string placement; if there is a non-qualified battery string in the two inspections, move the battery string to the string rework area; for battery strings that need to be buffered, move them to the string buffer area. Step S23: Feed back the detection results from step S22 to the string welding machine; Step S24: After completing a single string arrangement, the glass carrying the positive film and battery string moves forward one step in the stepping transmission area, and transmits the already placed battery string out of the precise string arrangement area. At the same time, the next set of battery strings to be arranged is moved from the battery string position positioning area to the precise string arrangement area. Step S25: Repeat steps S22-S24 until all battery strings are placed on the glass. The glass carrying the positive film and battery strings is moved to the string placement completion area to complete the detection and arrangement of the battery strings.

[0010] Furthermore, in the battery string preparation, testing, and arrangement method of the present invention, step S3 includes: If both groups A and B are normal, the results are fed back to the string welding machine, and the string welding machine does not need to change the stringing logic. If string A is defective, string A is placed in the string rework area, while string B is placed in the string buffer area. After string A is reworked, the two strings are combined into one group for layout, and the result is fed back to the string welding machine. The string welding machine does not need to change the string making logic. If string A is defective, string A is placed in the string rework area, while string B is placed in the string buffer area. If string A cannot be reworked in time, the buffered string B cannot be further arranged. The result is fed back to the string welding machine, which adjusts the string making logic. The next set of battery strings produces string A, which is merged with the buffered string B into one set, and the equipment performs normal arrangement.

[0011] Furthermore, the battery string preparation, testing and layout method of the present invention further includes a string buffer conveying area and a string receiving area in the integrated string testing and layout equipment; The string buffer transport area is used to transfer battery strings to the string buffer area. In some cases where space is limited, the string buffer area is located far from the string welding machine. By setting up the string buffer transport area, the battery strings prepared by the string welding machine can be quickly transferred to the string buffer area, thereby improving the transmission efficiency.

[0012] The stringing area is used to receive the battery strings prepared by the stringing machine and transfer them to the battery string positioning area, string buffer area, or string rework area. By setting up the stringing area, the transmission efficiency between the battery strings prepared by the stringing machine and the battery string positioning area, string buffer area, or string rework area is improved, thereby improving the overall processing efficiency of battery string preparation, inspection, and layout.

[0013] The battery string preparation, testing, and layout method of this invention integrates the string inspection and layout functions into a single integrated string inspection and layout device. Simultaneously, the string welding machine can produce battery strings based on feedback from this integrated device, enabling timely consumption of buffer strings and preventing excessive accumulation. Furthermore, structural improvements reduce the number of battery string handling operations, minimizing battery string anomalies caused by handling and improving product yield. It also saves equipment floor space, and improved system coordination shortens transmission times and distances, reducing battery string arcing. Attached Figure Description

[0014] Figure 1 This is a flowchart of the battery string preparation, testing, and layout method according to an embodiment of the present invention; Figure 2 This is a schematic diagram of the structural distribution of the integrated serial inspection and typesetting equipment described in Embodiment 1 of the present invention; Figure 3 This is a schematic diagram of the production process logic described in an embodiment of the present invention; Figure 4 This is a schematic diagram of the structural distribution of the integrated serial inspection and typesetting equipment described in Embodiment 2 of the present invention; Figure 5 This is a schematic diagram of the structural distribution of the integrated serial inspection and typesetting equipment described in Embodiment 3 of the present invention. Detailed Implementation

[0015] The battery string preparation, testing, and arrangement method of the present invention will be described in detail below with reference to the accompanying drawings and embodiments.

[0016] Example 1 This embodiment discloses a method for preparing, testing, and arranging battery strings, such as... Figure 1 As shown, the specific steps include: Step S1: Use an AB double-rail stringer to prepare two sets of battery strings, A and B.

[0017] Step S2: The aforementioned battery strings are fed into the integrated string inspection and layout equipment. During the feeding process, the appearance and battery quality of the battery strings are inspected, and the results are fed back to the string welding machine. The integrated string inspection and layout equipment is equipped with a glass and positive film stacking component positioning area, a stepping transmission area, a string placement completion area, a battery string position positioning area, a string buffer area, and a string rework area. The stepping transmission area is equipped with a precision string placement area. In specific applications, operators can reasonably arrange the glass and positive film stacking component positioning area, stepping transmission area, string placement completion area, battery string position positioning area, string buffer area, and string rework area according to the space of the specific application scenario, while meeting the process flow requirements of each step.

[0018] In this embodiment of the disclosure, the integrated serial inspection and typesetting device is configured with upper and lower layers, namely the upper layer and the lower layer; as follows: Figure 2 As shown, the glass and positive film stacking component positioning area, the stepping transmission area, and the string placement completion area are located on the lower layer; the glass and positive film stacking component positioning area is used for positioning the glass and positive film stacking component. The battery string position positioning area, string buffer area, and string rework area are located on the upper layer; the stepping transmission area is equipped with a precise string placement area.

[0019] The glass and positive film stacked component have a first state, a second state and a third state in the step transmission area; In the first state, there are no battery strings above the glass and positive film stack. The glass and stack move forward until the position where the first set of battery strings needs to be placed coincides with the position of the precise placement area, so as to place the first set of battery strings. In the second state, there are battery strings above the glass and positive film stack and there is a battery string placement position. The glass and stack move forward to the position where the battery strings need to be placed, which is adjacent to the already placed battery strings, and this position coincides with the precise placement area position, so as to place the adjacent set of battery strings. In the third state, there is a battery string above the glass and positive film stack and no string placement position. The string placement is completed, the glass and stack move forward and exit the step transmission area, and at the same time the next set of glass and positive film stacks enters the aforementioned first state.

[0020] Step S2 specifically includes the following processes: Step S21: Position the glass and positive film stack and transfer them to the stepping transport area; Step S22: Perform appearance and battery quality inspection on the battery string; if both inspections are qualified, move the battery string to the battery string positioning area for positioning, and then move it to the precision string placement area of ​​the stepping transmission area for string placement; if there is a non-qualified battery string in the two inspections, move the battery string to the string rework area; for battery strings that need to be buffered, move them to the string buffer area; the handling or displacement of battery strings can be carried out by means of conveyor belt or robot as needed.

[0021] Step S23: Feed back the detection results from step S22 to the string welding machine; Step S24: After completing a single string arrangement, the glass carrying the positive film and battery string moves forward one step in the stepping transmission area, and transmits the already placed battery string out of the precise string arrangement area. At the same time, the next set of battery strings to be arranged is moved from the battery string position positioning area to the precise string arrangement area. Step S25: Repeat steps S22-S24 until all battery strings are placed on the glass. The glass carrying the positive film and battery strings is moved to the string placement completion area to complete the detection and arrangement of the battery strings.

[0022] Step S3: The stringer adjusts the stringing logic for subsequent battery strings based on the feedback results. For example... Figure 3 As shown, the specific process includes the following: If both groups A and B are normal, the results are fed back to the string welding machine, and the string welding machine does not need to change the stringing logic. If string A is defective, string A is placed in the string rework area, while string B is placed in the string buffer area. After string A is reworked, the two strings are combined into one group for layout, and the result is fed back to the string welding machine. The string welding machine does not need to change the string making logic. If string A is defective, string A is placed in the string rework area, while string B is placed in the string buffer area. If string A cannot be reworked in time, the buffered string B cannot be further arranged. The result is fed back to the string welding machine, which adjusts the string making logic. The next set of battery strings produces string A, which is merged with the buffered string B into one set, and the equipment performs normal arrangement.

[0023] Step S4: The aforementioned battery strings are inspected and arranged by the integrated string inspection and layout equipment.

[0024] In specific applications, such as the battery string receiving area on one side of the integrated battery string inspection and sorting equipment described in this embodiment, the battery string can simultaneously receive the battery strings output by one or two battery string conveying mechanisms, depending on specific needs.

[0025] Example 2 Based on the battery string preparation, testing and layout method described in Embodiment 1 above, in this embodiment, two battery string conveyors are set on one side of the integrated string inspection and layout equipment. Each battery string conveyor includes two string preparation tracks, namely the right side material receiving area of ​​battery string 1, the left side material receiving area of ​​battery string 1, the right side material receiving area of ​​battery string 2, and the left side material receiving area of ​​battery string 2.

[0026] In the embodiments disclosed herein, such as Figure 4As shown, the integrated string inspection and layout equipment is equipped with a string buffer conveying area and a string receiving area; at the same time, it is equipped with a string A buffer conveying area, a string A buffer area, a right receiving area for battery string 1, a left receiving area for battery string 1, a string B buffer conveying area, a string B buffer area, a right receiving area for battery string 2, and a left receiving area for battery string 2, respectively, for strings A and B; and the string A buffer area and string B buffer area are located on the other side of the integrated string inspection and layout equipment, above the output area of ​​the completed glass, positive film, and battery string composite.

[0027] During the preparation, testing, and layout of battery strings, the string buffer conveying area transfers battery strings to the string buffer area. That is, battery strings that need to be transferred to the buffer area first pass through the string buffer conveying area and then are conveyed to the string buffer area. The string receiving area receives the battery strings prepared by the string welding machine and conveys them to the battery string positioning area, the string buffer area, or the string rework area. The remaining battery string preparation, testing, and layout processes are the same as described in Example 1 and will not be repeated here.

[0028] Example 3 Based on the battery string preparation, testing, and layout method described in Embodiment 2 above, in this embodiment of the disclosure, to further save equipment space, such as Figure 5 As shown, each A / B string buffer area corresponds to only one string buffer transport area. During use, the A group of battery strings to be buffered is moved to the A string buffer area via the string buffer transport area; then, the B buffer area is moved to the original position of the A buffer area, allowing the B group of battery strings to be buffered to be moved to the B string buffer area via the string buffer transport area. Thus, the A and B buffer areas move cyclically, enabling one string buffer transport area to transport two different types of battery strings (A and B) to their respective string buffer areas. The remaining battery string preparation, testing, and arrangement processes are the same as described in Example 1 and will not be repeated here.

Claims

1. A method for preparing, testing, and arranging battery strings, characterized in that, Includes the following steps: Step S1: The AB dual-rail string welding machine produces two sets of battery strings, A and B; Step S2: The aforementioned battery string is fed into the integrated string inspection and layout equipment. During the feeding process, the appearance and battery quality of the battery string are inspected, and the inspection results are fed back to the string welding machine. Step S3: The stringer adjusts the stringing logic of subsequent battery strings based on the feedback results; Step S4: The aforementioned battery strings are inspected and arranged by the integrated string inspection and layout equipment.

2. The method for preparing, testing, and arranging battery strings according to claim 1, characterized in that: The integrated string inspection and sorting equipment is equipped with a glass and positive film stacking component positioning area, a stepping transmission area, a string placement completion area, a battery string position positioning area, a string buffer area, and a string rework area; the stepping transmission area is equipped with a precision string placement area; The glass and positive film stacking component positioning area is used to position the glass and positive film stacking component; The stepping transmission area is used to perform stepping displacement of the glass carrying the positive film and the battery string during the stringing process; The precise stringing area is used for placing battery strings on glass and positive film stacking components; The string arrangement completion area is used to store the glass positive film and battery string that have been arranged. The battery string positioning area is used to position the battery strings transmitted from the string welding machine. The string buffer area is used to store the battery strings that need to be buffered, which are delivered by the string welding machine; The rework area is used to store defective battery strings.

3. The method for preparing, testing, and arranging battery strings according to claim 2, characterized in that: The integrated serial inspection device is configured with two layers, namely an upper layer and a lower layer; The glass and positive film stacking component positioning area, stepping transmission area and swing string completion area are located on the upper layer; The battery string location area, string buffer area, and string repair area are located in the lower layer.

4. The method for preparing, testing, and arranging battery strings according to claim 2 or 3, characterized in that: The glass and positive film stacked component have a first state, a second state and a third state in the step transmission area; In the first state, there are no battery strings above the glass and positive film stack. The glass and stack move forward until the position where the first set of battery strings needs to be placed coincides with the position of the precise placement area, so as to place the first set of battery strings. In the second state, there are battery strings above the glass and positive film stack and there is a battery string placement position. The glass and stack move forward to the position where the battery strings need to be placed, which is adjacent to the already placed battery strings, and this position coincides with the precise placement area position, so as to place the adjacent set of battery strings. In the third state, there is a battery string above the glass and positive film stack and no string placement position. The string placement is completed, the glass and stack move forward and exit the step transmission area, and at the same time the next set of glass and positive film stacks enters the aforementioned first state.

5. The method for preparing, testing, and arranging battery strings according to claim 4, characterized in that: Step S2 includes: Step S21: Position the glass and positive film stack and transfer them to the stepping transport area; Step S22: Perform appearance and battery quality inspection on the battery string; if both inspections are qualified, move the battery string to the battery string positioning area for positioning, and then move it to the precise string placement area of ​​the stepping transmission area for string placement; if there is a non-qualified battery string in the two inspections, move the battery string to the string rework area; for battery strings that need to be buffered, move them to the string buffer area. Step S23: Feed back the detection results from step S22 to the string welding machine; Step S24: After completing a single string arrangement, the glass carrying the positive film and battery string moves forward one step in the stepping transmission area, and transmits the already placed battery string out of the precise string arrangement area. At the same time, the next set of battery strings to be arranged is moved from the battery string position positioning area to the precise string arrangement area. Step S25: Repeat steps S22-S24 until all battery strings are placed on top of the glass. The glass carrying the positive film and battery strings is moved to the string placement completion area to complete the detection and arrangement of the battery strings.

6. The method for preparing, testing, and arranging battery strings according to claim 4, characterized in that: Step S3 includes: If both groups A and B are normal, the results are fed back to the string welding machine, and the string welding machine does not need to change the stringing logic. If string A is defective, string A is placed in the string rework area, while string B is placed in the string buffer area. After string A is reworked, the two strings are combined into one group for layout, and the result is fed back to the string welding machine. The string welding machine does not need to change the string making logic. If string A is defective, string A is placed in the string rework area, while string B is placed in the string buffer area. If string A cannot be reworked in time, the buffered string B cannot be further arranged. The result is fed back to the string welding machine, which adjusts the string making logic. The next set of battery strings produces string A, which is merged with the buffered string B into one set, and the equipment performs normal arrangement.

7. The method for preparing, testing, and arranging battery strings according to claim 2, characterized in that: The integrated serial inspection and layout equipment is also equipped with a serial buffer conveying area and a serial receiving area; The string buffer transport area is used to transfer battery strings to the string buffer area; The stringing area is used to receive the battery strings prepared by the string welding machine and transfer them to the battery string positioning area, string buffer area, or string rework area.

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