A processing method of a battery piece and a photovoltaic module processing system

Abstract

This invention discloses a method for processing solar cells and a photovoltaic module processing system. The method includes cutting a whole solar cell into half cells. An information code is set on each half cell, and information about the half cell is stored in the information code. The information code of each half cell is read by a detection device to sort the half cells. A conveying device transports the half cells that meet the requirements of the processing equipment to the processing equipment. The processing equipment reads the information code of each half cell, obtains the information of the half cell, and processes the half cell. This design enables traceability of the half cells, which improves traceability efficiency and accuracy, better meeting practical needs.

Description

Technical Field

[0001] This invention relates to the field of photovoltaic module technology, and in particular to a method for processing solar cells and a photovoltaic cell processing system. Background Technology

[0002] Typically, photovoltaic (PV) module manufacturing involves processes such as coding, packaging, transportation, unpacking, and dicing of the entire cell. However, to improve PV module efficiency, half-cell cells are usually used. Because the entire cell is coded during manufacturing, it is impossible to trace the corresponding half-cell in a timely manner when the PV module malfunctions or stops working, resulting in reduced traceability accuracy and efficiency. Summary of the Invention

[0003] The purpose of this invention is to provide a method for processing solar cells and a photovoltaic module processing system to improve traceability efficiency and accuracy.

[0004] This invention provides a method for processing battery cells, the method comprising:

[0005] The entire battery cell is cut into battery halves;

[0006] An information code is set on the battery half-cell, and the information of the battery half-cell is stored in the information code;

[0007] The information code of the battery half-cell is read by the detection device to sort the battery half-cells.

[0008] The conveying device transports the battery half-cells that meet the requirements of the processing equipment to the processing equipment;

[0009] The processing equipment reads the information code of the battery half-cell, obtains the information of the battery half-cell, and processes the battery half-cell.

[0010] In one possible implementation, after setting an information code on the battery half-cell and storing information about the battery half-cell in the information code, the processing method of the battery cell includes:

[0011] The battery half-cell is coated, and the coating information is stored in the information code.

[0012] In one possible implementation, after setting an information code on the battery half-cell and storing information about the battery half-cell in the information code, the processing method of the battery cell includes:

[0013] The battery half-cell is texturized, and the texturizing information is stored in the information code.

[0014] In one possible implementation, after reading the information code of the battery half-cell using a detection device and performing a sorting step on the battery half-cell, the processing method of the battery cell includes:

[0015] The conveying device transports the battery halves that do not meet the requirements of the processing equipment to the buffer zone.

[0016] In one possible implementation, after the conveying device transports the battery half-cell that does not meet the requirements of the processing equipment to the buffer zone, the processing method of the battery half-cell includes:

[0017] When the battery half in the buffer meets the requirements of the processing area, the conveying device transports the battery half in the buffer to the processing equipment.

[0018] In one possible implementation, the step of setting an information code on the battery half-cell and storing information about the battery half-cell in the information code includes:

[0019] At least one of the following information about the battery half-cell: conversion efficiency, color, and process parameters, is stored in the information code.

[0020] In one possible implementation, the step of setting an information code on the battery half-cell and storing information about the battery half-cell in the information code includes:

[0021] The information code is generated by encoding the battery half-cell through the production execution system.

[0022] In one possible implementation, after setting an information code on the battery half-cell and storing information about the battery half-cell in the information code, the processing method of the battery cell includes:

[0023] The battery half-cell with the information code is placed into the material box, and the conveying device transports the material box to the processing equipment.

[0024] In one possible implementation, the method for processing the battery cell includes:

[0025] The processing equipment stores the processing parameters into the information code.

[0026] This application also provides a photovoltaic module processing system, applied to the processing method of the solar cells described in any of the above claims, wherein the photovoltaic module processing system includes:

[0027] Battery cell manufacturing equipment, used to produce battery half-cells;

[0028] A coding device, used to set information codes on the battery half-cell;

[0029] A conveying device for transporting the battery half-cell;

[0030] Processing equipment, the processing equipment being used to process the battery half-cell.

[0031] This application provides a method for processing solar cells and a photovoltaic module processing system. The method includes cutting a whole solar cell into half cells. An information code is set on each half cell, and information about the half cell is stored in the information code. The information code of each half cell is read by a detection device to sort the half cells. A conveying device transports the half cells that meet the requirements of the processing equipment to the processing equipment. The processing equipment reads the information code of each half cell, obtains the information of the half cell, and processes the half cell. This design enables traceability of the half cells, which improves traceability efficiency and accuracy, and better meets practical needs. Attached Figure Description

[0032] Figure 1 A flowchart illustrating the processing method of the battery cell provided in this application;

[0033] Figure 2 The diagram shows the parameters of the battery cells provided in this application. Detailed Implementation

[0034] The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and should not be construed as limiting the present invention.

[0035] like Figure 1 As shown in the figure, this application provides a method for processing a battery cell, wherein the method for processing the battery cell includes:

[0036] S1. Cut the whole battery into battery halves.

[0037] S2. Set an information code on the battery half-cell and store the information of the battery half-cell in the information code.

[0038] S3. The battery half-cells are sorted by reading the information code of the battery half-cells through the detection equipment.

[0039] S4. The conveying device transports the battery halves that meet the requirements of the processing equipment to the processing equipment.

[0040] S5. The processing equipment reads the information code of the battery half-cell, obtains the information of the battery half-cell, and processes the battery half-cell.

[0041] Typically, solar cells are processed as whole sheets. However, in the processing of photovoltaic modules, whole solar cells are usually cut into half-cells for use to improve the efficiency of the photovoltaic modules. The solar cell processing method provided in this application involves cutting whole solar cells into half-cells suitable for photovoltaic modules, and storing corresponding information on each half-cell for storing information about the cell layout. A detection device can read the information on the half-cells through the information codes located on them, thereby sorting them according to the information to obtain half-cells that meet the requirements of the processing equipment. A conveying device transports the half-cells that meet the requirements of the processing equipment to the processing equipment, which may be a stringer or similar machine. The processing equipment reads the information codes located on the half-cells, identifies the half-cells, and processes them.

[0042] This design allows for direct tracing of the corresponding half-cell by using its information code when the photovoltaic module malfunctions or stops working. This enables the acquisition of more accurate information, facilitating rapid identification of the cause of the fault and improving maintenance efficiency.

[0043] Furthermore, reading the information code of a battery half-cell by the processing equipment allows for verification of the half-cell's information, reducing the possibility of using incorrect half-cells for processing. This improves the product quality and efficiency of photovoltaic modules, better meeting actual usage needs. In the scheme of coding and slicing whole battery cells, the identification code stores information about the whole battery cell. However, in actual production, photovoltaic modules typically use structures cut from whole battery cells, such as half-cells. Therefore, during traceability, it is impossible to accurately trace the corresponding half-cell. Moreover, after cutting a whole battery cell into half-cells, the parameter information of the half-cells will change. The information of the half-cell cannot be directly derived from the parameters of the whole battery cell. Even half-cells cut from the same whole battery cell will have different parameter information. Therefore, when reading the code, it is impossible to obtain the corresponding half-cell information from the parameter information of the whole battery cell.

[0044] Based on actual testing, the following Figure 2 As shown, when a whole battery cell is sliced, the performance of the resulting battery halves will differ to some extent. Figure 2Taking the battery cell shown in the table as an example, the data obtained from testing the entire battery cell are as follows: the conversion efficiency of the entire battery cell is 26.12%, the open-circuit voltage (Voc) is 0.7360V, the short-circuit current (Isc) is 13.72A, the fill factor (FF) is 85.38%, and the reverse leakage current is 134mA. After processing the entire battery cell into half cells, battery half cells A and B are obtained. The data for battery half cells A and B are as follows: Battery half cell A has a conversion efficiency of 26.08%, an open-circuit voltage (Voc) of 0.7352V, a short-circuit current (Isc) of 6.862A, a fill factor (FF) of 85.34%, and a reverse leakage current of 112mA. Battery half cell B has a conversion efficiency of 26.03%, an open-circuit voltage (Voc) of 0.7343V, and a short-circuit current (Isc) of 13.72A. The current rating (sc) is 6.862A, the fill factor (FF) is 85.28%, and the reverse leakage current is 189mA. From the above data, it can be seen that the parameters of battery halves cut from the same whole battery cell will differ. Therefore, when the whole battery cell is first coded, the stored information is that of the whole cell. After subsequent halving, the parameters of the resulting battery halves are not the same. When tracing by reading the codes, the information obtained is still that of the whole battery cell, making it impossible to trace back to the corresponding battery half and obtain its data. The parameters of the battery halves obtained after halving cannot be completely derived from the parameters of the whole cell; the derived data will contain errors, leading to inaccurate information. The solution provided in this application, by first halving the whole battery cell and then coding it, can store the corresponding information of the battery halves. Therefore, during tracing, it can directly trace back to the corresponding battery half and read its parameter information, resulting in higher tracing accuracy and more accurate information.

[0045] Meanwhile, the entire battery cell is cut before being transported to the processing equipment. It can be directly transported to the processing equipment in the form of half-cells through the material box. Compared with the existing scheme of classifying, packaging, transporting, unpacking and loading the battery cells in advance, this application can sort and transport the battery cells in real time. This helps to reduce the packaging and unpacking process of the battery cells, improve the overall production efficiency of photovoltaic modules, shorten the processing cycle, and better meet the actual production needs.

[0046] like Figure 1 As shown, in one possible implementation, after step S2, the processing method of the battery cell includes:

[0047] S21. Coat the battery half-cell and store the coating information in the information code.

[0048] By coating the battery half-cells to form a protective layer on their surface, the possibility of oxidation is reduced, improving the stability and efficiency of the half-cells. Storing coating-related information in an information code allows for retrieval during subsequent traceability processes, facilitating the tracking of the battery half-cell's processing flow and improving traceability efficiency and accuracy. When photovoltaic modules malfunction or stop working, the coating-related information can be retrieved by reading the battery half-cell's information code, thus determining whether the fault is related to the coating.

[0049] like Figure 1 As shown, in one possible implementation, after step S2, the processing method of the battery cell includes:

[0050] S22. Texturize the battery half-cells and store the texturing information in the information code.

[0051] During the production of solar cells, oxidation or phosphating can occur, affecting cell performance and lifespan. Texturing the cell halves removes surface contaminants, oxidation, and phosphating. Furthermore, creating pyramidal or wormhole-like textures on the cell halves improves light absorption efficiency, thus enhancing cell efficiency and energy storage capacity. Storing texturing-related information in a code allows for easy tracing of the cell halves' processing flow, improving efficiency and accuracy. When photovoltaic modules malfunction or stop working, the cell halves' codes can be used to retrieve texturing information, helping to determine if the fault is related to texturing.

[0052] To improve the efficiency of battery half-cells and photovoltaic modules, the battery half-cells can be coated and texturized.

[0053] like Figure 1 As shown, in one possible implementation, after step S3, the cell processing method includes:

[0054] S31. The conveyor transports battery halves that do not meet the requirements of the processing equipment to the buffer zone.

[0055] To improve production efficiency, solar cell production lines simultaneously produce cells with different parameters. However, the types of cells required by processing equipment are usually fewer than those produced by the production line, meaning that some cells on the production line are temporarily not needed by the processing equipment. A conveyor system transports these unsuitable half-cells to a buffer zone, reducing the likelihood of half-cells piling up on the production line and minimizing their exposure to the external environment, which could lead to aging and damage. This, in turn, helps reduce costs.

[0056] By setting up a buffer zone, the steps of packaging, transporting, and storing battery cells in related technologies can be replaced. The buffer zone temporarily stores the battery cells, which helps to save costs. When the battery half-cells in the buffer zone are needed, they can be directly transported to the corresponding processing equipment through the material box, which helps to improve production efficiency and better meet actual usage needs.

[0057] The buffer zone can be a light-free environment with an oxygen concentration not exceeding 3% and an ambient concentration not exceeding 20%.

[0058] This design can reduce the possibility of battery half-cell aging, which helps to extend the service life of battery half-cells, reduce losses, lower costs, and better meet actual usage needs.

[0059] like Figure 1 As shown, in one possible implementation, after step S31, the cell processing method includes:

[0060] S32. When the battery half-piece in the buffer zone meets the requirements of the processing area, the conveying device transports the battery half-piece in the buffer zone to the processing equipment.

[0061] This design improves the utilization rate of battery half-cells, reduces the possibility of battery half-cells accumulating in the buffer zone, and better meets actual usage needs.

[0062] The solution provided in this application embodiment can transport battery halves using material boxes. When an empty material box is transported to the designated unloading area of ​​the battery end testing and sorting machine, its identification code can be read. The sorted battery halves are then placed into the corresponding material box, and the information code of the battery halves is bound to the identification code of the material box. After a certain number of battery halves are loaded into the material box, it is transported to the corresponding processing equipment or buffer zone. Whether the processing equipment needs this type of battery halves can be determined based on order requirements. These requirements can be the classification information of the material boxes or the classification information of all battery halves. When multiple processing devices are available, the material boxes or battery halves can be transported to the corresponding processing devices for production based on their information.

[0063] In one possible implementation, the identification code of the material box can be bound to the processing equipment. That is, the material box can be specifically used to feed materials to a certain processing equipment. When the material box is detected, the corresponding processing equipment can be identified based on the material box, and then the needs of the processing equipment can be known, so as to put the corresponding battery half into the material box.

[0064] In one possible implementation, since the battery can read the identification code of the material box and obtain the material box information, the conveying device can be controlled to transport the material box to the designated processing equipment or buffer zone according to the material box information. The receiving end of the material box does not need to perform code verification again. That is, code verification can be performed only at the battery end during transportation, i.e., only one code verification is performed. This design can help improve production efficiency.

[0065] In one possible implementation, after reading the identification code of the material box, a battery half can be inserted into the material box, and the information of the battery half can be bound to the material box. The material box can then be transported to the corresponding processing equipment based on the information of the battery half inside the material box, meaning that the material box can be reused among multiple processing equipment.

[0066] In one possible implementation, step S2 includes:

[0067] S201. Store at least one of the following information of the battery half-cell: conversion efficiency, color, and process parameters, into an information code.

[0068] This design facilitates the retrieval of battery half-cell information when reading the information code. The more restricted the types of battery half-cell information stored in the information code, the greater the amount of information retrieved when reading the information code, resulting in more accurate traceability of the battery half-cell. This improves the accuracy and efficiency of battery half-cell traceability, better meeting actual usage needs.

[0069] The information stored in the information code may include, but is not limited to, the conversion efficiency, color, and process parameters of the battery half-cell.

[0070] In one possible implementation, the battery half-cells are encoded by a production execution system to generate an information code.

[0071] A Manufacturing Execution System (MES) can realize a complete production information system, from the initial data acquisition to process monitoring and online management, and finally to cost-related data management. The system's functional modules provide a gradual transition from the low-level, near-automated monitoring process to the operational level of cost management. This allows enterprises to meet the requirements of different planning stages in the field of information-based production management, achieving a smooth transition and gradual improvement of the information process while building upon existing foundations.

[0072] Encoding battery cells through a production execution system can improve the efficiency and accuracy of cell traceability, better meeting actual needs.

[0073] In one possible implementation, after step S2, the processing method of the battery cell includes:

[0074] S23. Place the battery half with the information code into the material box, and the conveyor transports the material box to the processing equipment.

[0075] Transporting battery cells to processing equipment via a material box eliminates the need for packaging and unpacking, which helps shorten the processing cycle and improve processing efficiency.

[0076] like Figure 1 As shown, in one possible implementation, the method for processing the solar cell includes:

[0077] S6. The processing equipment stores the processing parameters into an information code.

[0078] This design enables the information code to store processing information from the processing equipment. When the photovoltaic module malfunctions or stops working, the processing parameters of the half cell can be obtained by reading the information code of the half cell, which facilitates the traceability of the processing process, improves the efficiency of troubleshooting, and better meets actual usage needs.

[0079] This application also provides a photovoltaic module processing system, which can be applied to the above-mentioned cell processing methods. The photovoltaic module processing system includes cell production equipment, marking equipment, conveying device, and processing equipment. The cell production equipment is used to produce cell half-cells. During the bracket processing, whole cells can be produced first, and then the whole cells are cut to form cell half-cells. The marking equipment is used to set information codes on the cell half-cells. The conveying device is used to move the cell half-cells. The processing equipment can be a stringer, etc., to process the cell half-cells.

[0080] The solution provided in this application encodes battery halves using half-cell ID as one dimension, eliminating the need for packaging and unpacking before loading the cells. The half-cells are directly stored in a material box, which is then transported directly to processing equipment such as a stringer. When the photovoltaic module malfunctions or stops working, each battery half-cell can be traced back to its original location, allowing for parameter extraction and traceability of the half-cell's production and processing. This improves traceability efficiency and accuracy.

[0081] The cell processing method provided in this application can be applied to a vertically integrated photovoltaic factory to facilitate traceability of half-cells. Separated from conventional cell-module workshops, the vertically integrated factory connects the crystalline silicon, cell, and module workshops. Half-cells are produced in the cell workshop and directly transported to the module workshop for module production. By encoding the half-cells, the granularity of information traceability can be adjusted from whole cells to half-cells, resulting in higher traceability accuracy and facilitating data analysis of half-cell and module processes. Furthermore, due to the interconnectedness of the crystalline silicon, cell, and module workshops, the overall cell production and consumption cycle is faster, production is more concentrated, production efficiency is higher, and traceability is more timely. This facilitates information transmission, accelerates feedback, improves processes, shortens the technical verification cycle, and better meets actual production needs.

[0082] The above description, based on the embodiments shown in the figures, details the structure, features, and effects of the present invention. The above description is only a preferred embodiment of the present invention, but the present invention is not limited to the scope of implementation shown in the figures. Any changes made in accordance with the concept of the present invention, or equivalent embodiments modified to have equivalent changes, that do not exceed the spirit covered by the specification and figures, should be within the protection scope of the present invention.

Claims

1. A method for processing battery cells, characterized in that, The processing method of the battery cell includes: The entire battery cell is cut into battery halves; An information code is set on the battery half-cell, and the information of the battery half-cell is stored in the information code; The information code of the battery half-cell is read by the detection device to sort the battery half-cells. The conveying device transports the battery half-cells that meet the requirements of the processing equipment to the processing equipment; The processing equipment reads the information code of the battery half-cell, obtains the information of the battery half-cell, and processes the battery half-cell; After reading the information code of the battery half-cell using a testing device and performing a sorting step on the battery half-cell, the processing method of the battery cell includes: The conveying device transports the battery half-pieces that do not meet the requirements of the processing equipment to the buffer zone; After the conveying device transports the battery half-cell that does not meet the requirements of the processing equipment to the buffer zone, the processing method of the battery half-cell includes: When the battery half-piece in the buffer meets the requirements of the processing equipment, the conveying device transports the battery half-piece in the buffer to the processing equipment.

2. The method for processing battery cells according to claim 1, characterized in that, After setting an information code on the battery half-cell and storing information about the battery half-cell in the information code, the processing method of the battery cell includes: The battery half-cell is coated, and the coating information is stored in the information code.

3. The method for processing battery cells according to claim 1, characterized in that, After setting an information code on the battery half-cell and storing information about the battery half-cell in the information code, the processing method of the battery cell includes: The battery half-cell is texturized, and the texturizing information is stored in the information code.

4. The method for processing battery cells according to claim 1, characterized in that, The step of setting an information code on the battery half-cell and storing information about the battery half-cell in the information code includes: At least one of the following information about the battery half-cell: conversion efficiency, color, and process parameters, is stored in the information code.

5. The method for processing battery cells according to claim 1, characterized in that, The step of setting an information code on the battery half-cell and storing information about the battery half-cell in the information code includes: The information code is generated by encoding the battery half-cell through the production execution system.

6. The method for processing battery cells according to claim 1, characterized in that, After setting an information code on the battery half-cell and storing information about the battery half-cell in the information code, the processing method of the battery cell includes: The battery half-cell with the information code is placed into the material box, and the conveying device transports the material box to the processing equipment.

7. The method for processing a battery cell according to any one of claims 1 to 6, characterized in that, The processing method of the battery cell includes: The processing equipment stores the processing parameters into the information code.

8. A photovoltaic module processing system, applied to the processing method of the solar cells according to any one of claims 1 to 7, characterized in that, The photovoltaic module processing system includes: Battery cell manufacturing equipment, used to produce battery half-cells; A coding device, used to set information codes on the battery half-cell; A conveying device for transporting the battery half-cell; Processing equipment, the processing equipment being used to process the battery half-cell.

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