Solar cell orientation change detection method

Abstract

The present application provides a method for detecting changes in the orientation of solar cells, comprising the following steps: providing multiple detection areas on a cell, and providing a marker containing information within at least one detection area; utilizing a first detection device to detect at least one detection area on a cell located at an upstream process location; utilizing a second detection device to detect at least one detection area on a cell located at a downstream process location; and having a management system analyze changes in the orientation of the cell based on the information detected by the first and second detection devices. The method for detecting changes in the orientation of solar cells provided in the present application detects the distribution of markers on the cell at both the upstream and downstream process locations. By comparing the two detection results, changes in the orientation of the cell during its circulation can be determined, thereby improving the information-based traceability of the cell manufacturing process.

Description

Technical Field

[0001] The present invention relates to the field of photovoltaic technology, and in particular to a method for detecting changes in orientation of a solar cell. Background Art

[0002] During the production process of solar cells, the solar cells need to flow between multiple process locations. During this process, the orientation of the solar cells may rotate due to the intervention of manual or mechanical equipment.

[0003] The random changes in the orientation of solar cells on the production line will make it difficult to trace defective solar cells, thereby affecting the production yield and production efficiency of the cells. Summary of the Invention

[0004] In view of this, the present application provides a method for detecting changes in the orientation of solar cells, so as to solve the problem of difficulty in determining the orientation of solar cells on a production line in the prior art.

[0005] The present application provides a method for detecting a change in orientation of a solar cell, comprising the following steps:

[0006] Setting a plurality of detection areas on the battery cell, and setting a mark containing information in at least one of the detection areas;

[0007] Using a first detection device to detect at least one detection area on the battery cell at an upstream process position;

[0008] Using a second inspection device to inspect at least one inspection area on the battery cell at a downstream process position;

[0009] The management system analyzes the change in the orientation of the battery cell based on the information detected by the first detection device and the second detection device.

[0010] In one possible design, setting a marker containing information in at least one of the detection areas specifically includes:

[0011] Setting a marker containing information in one of the detection areas;

[0012] The detecting of at least one detection area on the battery cell at an upstream process position by using the first detection device specifically includes:

[0013] Using the first detection device to detect each of the detection areas on the battery cell;

[0014] The detecting of at least one detection area on the battery cell at a downstream process position by using the second detection device specifically includes:

[0015] The second detection device is used to detect each detection area on the battery cell.

[0016] In a possible design, the first detection device includes a plurality of first detection members, and the plurality of first detection members are arranged in a one-to-one correspondence with the plurality of detection areas;

[0017] The second detection device includes a plurality of second detection members, and the plurality of second detection members are arranged in a one-to-one correspondence with the plurality of detection areas.

[0018] In one possible design, the steps of setting a plurality of detection areas on the battery cell and setting a marker containing information in at least one of the detection areas specifically include:

[0019] Four detection areas are provided on the battery cell, and the four detection areas are provided on the battery cell in a centrally symmetrical manner, wherein two of the detection areas that are diagonally provided are each provided with a marker containing different information;

[0020] The detecting of at least one detection area on the battery cell at an upstream process position by using the first detection device specifically includes:

[0021] Using the first detection device to detect one of the detection areas on the battery cell;

[0022] The detecting of at least one detection area on the battery cell at a downstream process position by using the second detection device specifically includes:

[0023] The second detection device is used to detect one of the detection areas on the battery cell.

[0024] In one possible design, the steps of setting a plurality of detection areas on the battery cell and setting a marker containing information in at least one of the detection areas specifically include:

[0025] Four detection areas are provided on the battery cell, the four detection areas are provided on the battery cell in a centrally symmetrical manner, and a marker containing different information is provided in each of the four detection areas;

[0026] The detecting of at least one detection area on the battery cell at an upstream process position by using the first detection device specifically includes:

[0027] Using the first detection device to detect one of the detection areas on the battery cell;

[0028] The detecting of at least one detection area on the battery cell at a downstream process position by using the second detection device specifically includes:

[0029] The second detection device is used to detect one of the detection areas on the battery cell.

[0030] In a possible design, the logo is set on the battery cell by laser processing.

[0031] In one possible design, the first detection device and / or the second detection device is an optical code reader.

[0032] In a possible design, the identifier is a QR code.

[0033] In a possible design, the identifier is a barcode.

[0034] In one possible design, the first detection device and / or the second detection device is a CCD camera.

[0035] The method for detecting changes in the orientation of solar cells provided in the present application first detects the distribution of markings on the cell at an upstream process position, and then detects the distribution of markings on the cell at a downstream process position. By comparing and analyzing the two detection results, the orientation changes of the cell during the circulation process can be determined. Process personnel can quickly and accurately obtain the relative position relationship between the defective area and the equipment carrier, thereby improving the information traceability effect in the cell manufacturing process, and further improving the production yield and production efficiency of the cell.

[0036] Other features and advantages of the embodiments of the present application will be described in the subsequent description, and in part will become apparent from the description, or be understood by practicing the embodiments of the present application. The purposes and other advantages of the embodiments of the present application are achieved and obtained by the structures particularly pointed out in the description and drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0037] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following briefly introduces the drawings required for use in the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0038] Figure 1 A flow chart of a method for detecting a change in orientation of a solar cell provided in an embodiment of the present application;

[0039] Figure 2 A schematic diagram of the structure of a solar cell orientation change detection device provided in an embodiment of the present application;

[0040] Figure 3 A schematic top view of a solar cell orientation change detection device provided in an embodiment of the present application;

[0041] Figure 4 A schematic diagram of a battery cell provided in Example 1 of the present application;

[0042] Figure 5 This is a schematic diagram of the battery cell provided in Example 4 of the present application.

[0043] Reference numerals:

[0044] 100. Battery cell; 11. First detection area; 12. Second detection area; 13. Third detection area; 14. Fourth detection area; 2. First detection device; 21. First upper right detection member; 22. First lower left detection member; 3. Second detection device; 31. Second upper right detection member; 32. Second lower left detection member.

[0045] The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the present application and, together with the description, serve to explain the principles of the present application. DETAILED DESCRIPTION

[0046] In order to better understand the technical solution of the present application, the embodiments of the present application are described in detail below with reference to the accompanying drawings.

[0047] It should be clear that the embodiments described are only part of the embodiments of this application, not all of the embodiments. Based on the embodiments in this application, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of this application.

[0048] It should be understood that the term "and / or" as used herein is merely a description of the relationship between associated objects, indicating that three possible relationships exist. For example, "A and / or B" can represent: A exists alone, A and B exist simultaneously, or B exists alone. Furthermore, the character " / " in this document generally indicates that the associated objects are in an "or" relationship.

[0049] The terms used in the embodiments of the present application are only for the purpose of describing specific embodiments and are not intended to limit the present application. The singular forms "a", "an", "the" and "the" used in the embodiments of the present application and the appended claims are also intended to include plural forms unless the context clearly indicates otherwise.

[0050] In the description of the embodiments of this application, the technical terms "first" and "second" are used only to distinguish different objects and should not be understood to indicate or imply relative importance or implicitly specify the quantity, specific order, or primary and secondary relationship of the indicated technical features. In the description of the embodiments of this application, the meaning of "plurality" is more than two, unless otherwise clearly and specifically defined.

[0051] References to "embodiments" in this application mean that a particular feature, structure, or characteristic described in connection with the embodiment may be included in at least one embodiment of the application. The appearance of this phrase in various places in the specification does not necessarily refer to the same embodiment, nor does it constitute an independent or alternative embodiment that is mutually exclusive of other embodiments. It is understood, both explicitly and implicitly, by those skilled in the art that the embodiments described herein may be combined with other embodiments.

[0052] In the description of the embodiments of the present application, the term "multiple" refers to more than two (including two). Similarly, "multiple groups" refers to more than two groups (including two groups), and "multiple pieces" refers to more than two pieces (including two pieces).

[0053] In the description of the embodiments of the present application, the technical terms "center", "longitudinal", "transverse", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the accompanying drawings, and are only for the convenience of describing the embodiments of the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the embodiments of the present application. In addition, in the context, it is also necessary to understand that when it is mentioned that an element is connected to another element "on" or "under", it can not only be directly connected to the other element "on" or "under", but also be indirectly connected to the other element "on" or "under" through an intermediate element.

[0054] In the description of the embodiments of the present application, unless otherwise expressly specified or limited, technical terms such as "installed," "connected," "connected," and "fixed" should be understood in a broad sense. For example, they can refer to fixed connections, detachable connections, or integration; mechanical connections or electrical connections; direct connections or indirect connections through an intermediate medium; internal connections between two components or interactions between two components. Those skilled in the art can understand the specific meanings of the above terms in the embodiments of the present application based on specific circumstances.

[0055] Solar cells (hereinafter referred to as cells) are prone to scratches, breakages and other defective areas during the production process. The occurrence of defective areas in cells is closely related to the equipment and carriers in the production process. If the correspondence between the defective areas in the equipment and carriers can be quickly located, it will be helpful to quickly find the cause of the defect.

[0056] Currently, the relationship between defective cell areas and their locations within equipment or carriers is primarily determined manually by process engineers based on the cell's flow through various pieces of equipment. If all cells were able to follow a fixed flow pattern during the manufacturing process, process engineers would be able to reverse engineer the relative locations of defective areas, equipment, and carriers.

[0057] However, during mass production, some battery cells may be rotated 90°, 180° or even 270° due to manual intervention such as manual removal, measurement and then putting back, or manual placement in carriers. In addition, due to the logical settings of the loading and unloading flow of some automated equipment (such as chain wet chemical loading and unloading), some battery cells will also rotate 180° after passing through the equipment. Because most battery cells are centrally symmetrical square battery cells, the orientation of the rotated battery cell changes, but the appearance of the rotated battery cell is no different from that of other non-rotated battery cells, making it difficult to distinguish with the naked eye. Based on this, under the influence of the possible random rotation of the battery cell, process personnel cannot quickly and accurately obtain the relative position relationship between the defective area and the equipment and carrier.

[0058] Therefore, designing a method for detecting solar cell orientation changes can greatly improve the information traceability effect during the cell manufacturing process, thereby improving the production yield and production efficiency of the cell.

[0059] The following describes a specific embodiment of the method for detecting a change in the orientation of a solar cell according to the structure of the method provided in the embodiment of the present application.

[0060] See also Figure 1 、 Figure 2 、 Figure 3 and Figure 4 The present application provides a method for detecting a change in orientation of a solar cell, comprising the following steps:

[0061] S1: setting a plurality of detection areas on the battery cell 100, and setting a mark containing information in at least one detection area;

[0062] S2: Use the first inspection device 2 to inspect at least one inspection area DD230238I on the battery cell 100 at the upstream process position.

[0063] Conduct testing;

[0064] S3: Using the second inspection device 3 to inspect at least one inspection area on the battery cell 100 at a downstream process position;

[0065] S4: The management system analyzes the orientation change of the battery cell 100 based on the information detected by the first detection device 2 and the second detection device 3 .

[0066] See also Figure 4 Multiple detection areas can be set on one side of the battery cell 100. Specifically, the number of detection areas can be 2, 4, etc., and the multiple detection areas can be rotationally symmetrically arranged along the geometric center of the battery cell 100.

[0067] At least one detection area on the cell 100 is provided with a marker containing information. In one embodiment, the marker is provided on the cell 100 by laser processing. The laser can create small laser pits or lines of small pits on the cell 100 to form the marker containing information. The marker can be a QR code, barcode, or any other coded marker that can contain information. It should be noted that when the cell 100 has multiple detection areas, the multiple markers are exclusively distributed in each detection area, and the information contained in each marker is different.

[0068] The method for detecting changes in the orientation of solar cells can be implemented by a solar cell orientation change detection device. In some embodiments, the solar cell orientation change detection device includes a transport device for transporting the solar cell 100, a first detection device arranged at an upstream process position, a laser processing device arranged before the upstream process position (not shown in the figure), a second detection device arranged at a downstream process position, and a management system communicatively connected to the above-mentioned devices.

[0069] In certain embodiments, the first detection device 2 and / or the second detection device 3 are optical barcode readers, also known as industrial barcode readers. These integrate image acquisition, processing, and communication functions, creating a multifunctional, modular, and highly reliable machine vision solution. These optical barcode readers can identify a mark and obtain the information contained therein. Furthermore, the first detection device 2 and / or the second detection device 3 are CCD cameras. CCDs are currently the most commonly used image sensors in machine vision. They integrate photoelectric conversion, charge storage, charge transfer, and signal reading, making them typical solid-state imaging devices. Using CCD cameras, high-precision mark recognition is possible.

[0070] The first inspection device 2 is used to inspect at least one inspection area on a cell 100 located at an upstream process location, and the second inspection device 3 is used to inspect at least one inspection area on a cell 100 located at a downstream process location. During the production process, a cell 100 first passes through the upstream process location and then the downstream process location. The first inspection device 2 inspects the cell 100 at the upstream process location, and the second inspection device 3 inspects the cell 100 at the downstream process location. By comparing the results of the two inspections, the management system can determine the orientation change of the cell 100 from the upstream process location to the downstream process location. The management system can be implemented by an application program in conjunction with any type of volatile or non-volatile storage device, such as static random access memory (SRAM), erasable programmable read-only memory (EPROM), programmable read-only memory (PROM), read-only memory (ROM), etc. The management system and the first detection device 2 and the second detection device 3 can be connected via any wireless or wired communication method such as Bluetooth, a communication line, etc., so that signals can be freely transmitted between the interconnected devices.

[0071] The following specifically describes a first embodiment of a method for detecting a change in the orientation of a solar cell:

[0072] In this embodiment, the battery cell 100 is transported from the upstream process position to the downstream process position by an automated mechanical device. The battery cell 100 is a square battery cell 100. Figure 4 The cell 100 is provided with four inspection zones arranged around its geometric center. For ease of description, the upper left inspection zone is referred to as the first inspection zone 11, followed clockwise by the second inspection zone 12, the third inspection zone 13, and the fourth inspection zone 14. Markers A and B are provided in the second inspection zone 12 and the fourth inspection zone 14, respectively. These marks can be formed by laser engraving on the cell 100 in an upstream process.

[0073] See also Figure 3A first inspection device 2 is also installed at the upstream process location. This device includes a first upper-right inspection member 21 and a first lower-left inspection member 22. When the first inspection device 2 is mounted on the battery cell 100, the first upper-right inspection member 21 corresponds to the second inspection area 12, and the first lower-left inspection member 22 corresponds to the fourth inspection area 14. The inspection members can only detect conditions within their corresponding inspection areas. Because the identification mark is laser-engraved on the battery cell 100 before the first inspection device 2 performs its inspection, the first upper-right inspection member 21 and the first lower-left inspection member 22 of the first inspection device 2 can read identification mark A and identification mark B, respectively.

[0074] After going through some processes, the battery cell 100 is transported to the downstream process position, where a second detection device 3 is provided. The second detection device 3 includes a second upper right detection component 31 and a second lower left detection component 32. When the first detection device 2 corresponds to the battery cell 100, the second upper right detection component 31 corresponds to the detection area at the upper right position of the four detection areas of the battery cell 100, and the second lower left detection component 32 corresponds to the detection area at the lower left position of the four detection areas of the battery cell 100. The detection components can also only detect the conditions within the corresponding detection areas.

[0075] In an ideal situation where the orientation of the battery cell 100 does not change, the second upper right detection member 31 and the second lower left detection member 32 of the second detection device 3 can read the mark A and the mark B respectively.

[0076] When the battery cell 100 is rotated 90 degrees or 270 degrees in the clockwise or counterclockwise direction, the second upper right detection member 31 and the second lower left detection member 32 of the second detection device 3 cannot read any identification.

[0077] When the battery cell 100 is rotated 180 degrees in a clockwise or counterclockwise direction, the second upper right detection member 31 and the second lower left detection member 32 of the second detection device 3 can read the mark B and the mark A respectively.

[0078] In summary, the solar cell orientation change detection method provided in the present application can determine the orientation change of the cell 100 during the circulation process. It first detects the distribution of the mark on the cell at the upstream process position, and then detects the distribution of the mark on the cell at the downstream process position. By comparing and analyzing the two detection results, the orientation change of the cell during the circulation process can be determined, and the process personnel can quickly and accurately obtain the relative position relationship between the defective area and the equipment carrier, thereby improving the information traceability effect in the cell manufacturing process, and then improving the production yield and production efficiency of the cell.

[0079] The following provides Example 2:

[0080] The solar cell orientation change detection method of this embodiment includes the following steps:

[0081] S1: setting a plurality of detection areas on the battery cell 100, and setting a mark containing information in one of the detection areas;

[0082] S2: Using the first inspection device 2 to inspect each inspection area on the battery cell 100 at the upstream process position;

[0083] S3: using the second inspection device 3 to inspect each inspection area on the battery cell 100 at the downstream process position;

[0084] S4: The management system analyzes the orientation change of the battery cell 100 based on the information detected by the first detection device 2 and the second detection device 3 .

[0085] Compared with the above embodiments,

[0086] In this embodiment, four inspection areas are provided on the cell 100, arranged around the geometric center of the cell 100. For ease of description, the inspection area in the upper left corner is referred to as the first inspection area 11, followed clockwise by the second inspection area 12, the third inspection area 13, and the fourth inspection area 14. A mark A is provided in the second inspection area 12. The mark can be formed by laser engraving on the cell 100 at an upstream process location.

[0087] A first inspection device 2 is also installed at the upstream process location. The first inspection device 2 includes a first upper left inspection member, a first upper right inspection member 21, a first lower right inspection member, and a first lower left inspection member 22. When the first inspection device 2 is positioned relative to the battery cell 100, the first upper right inspection member 21 is positioned relative to the second inspection area 12. The inspection members can only detect conditions within the corresponding inspection area. Because the identification mark is engraved on the battery cell 100 by a laser device before the first inspection device 2 is inspected, the first upper right inspection member 21 of the first inspection device 2 can read the identification mark A.

[0088] After going through some processes, the battery cell 100 is transported to the downstream process position, where a second detection device 3 is provided. The second detection device 3 includes a second upper left detection member, a second upper right detection member 31, a second lower right detection member and a second lower left detection member 32. When the first detection device 2 corresponds to the battery cell 100, the second upper right detection member 31 corresponds to the detection area in the upper right position among the four detection areas of the battery cell 100.

[0089] In an ideal situation where the orientation of the battery cell 100 does not change, the second upper right detection member 31 of the second detection device 3 can read the mark A.

[0090] When the battery cell 100 is rotated 90 degrees in the clockwise direction, the second lower right detection component of the second detection device 3 can read the mark A.

[0091] When the battery cell 100 rotates 180 degrees in the clockwise direction, the second lower left detection member 32 of the second detection device 3 can read the mark A.

[0092] When the battery cell 100 rotates 270 degrees in the clockwise direction, the second upper left detection component of the second detection device 3 can read the mark A.

[0093] The second embodiment can also reduce the number of detection components in the first detection device 2 and the second detection device 3 to save costs. For example, the first detection device 2 and the second detection device 3 can be arranged in the manner of the first embodiment. Although only two detection areas can be detected, the orientation change of the battery cell 100 can also be determined to a certain extent.

[0094] The following is an example three:

[0095] In this embodiment, four inspection areas are provided on the cell 100, arranged around the geometric center of the cell 100. For ease of description, the inspection area in the upper left corner is referred to as the first inspection area 11, followed clockwise by the second inspection area 12, the third inspection area 13, and the fourth inspection area 14. Markers A and B are provided in the second inspection area 12 and the fourth inspection area 14, respectively. These markings can be formed by laser engraving on the cell 100 in an upstream process.

[0096] A first inspection device 2 is also installed at the upstream process location. The first inspection device 2 includes a first upper right inspection member 21. When the first inspection device 2 is positioned relative to the battery cell 100, the first upper right inspection member 21 is positioned relative to the second inspection area 12. The inspection member can only detect conditions within the corresponding inspection area. Because the identification mark is engraved on the battery cell 100 by a laser device before the first inspection device 2 is inspected, the first upper right inspection member 21 of the first inspection device 2 can read the identification mark A.

[0097] After going through some processes, the battery cell 100 is transported to the downstream process position, where a second detection device 3 is provided. The second detection device 3 includes a second upper right detection component 31. When the first detection device 2 corresponds to the battery cell 100, the second upper right detection component 31 corresponds to the detection area in the upper right position among the four detection areas of the battery cell 100. The detection component can also only detect the situation within the corresponding detection area.

[0098] In an ideal situation where the orientation of the battery cell 100 does not change, the second upper right detection member 31 of the second detection device 3 can read the mark A.

[0099] When the battery cell 100 is rotated 90 or 270 degrees in the clockwise direction, the second lower right detection component of the second detection device 3 cannot read any identification.

[0100] When the battery cell 100 rotates 180 degrees in the clockwise direction, the second lower left detection member 32 of the second detection device 3 can read the mark B.

[0101] This solution can determine whether the orientation of the battery cell 100 has changed at a relatively low cost.

[0102] The following is a fourth embodiment:

[0103] See also Figure 5 In this embodiment, four inspection areas are provided on the cell 100, arranged around the geometric center of the cell 100. For ease of description, the inspection area in the upper left corner is referred to as the first inspection area 11, followed clockwise by the second inspection area 12, the third inspection area 13, and the fourth inspection area 14. Marking A1 is provided in the first inspection area 11, marking A is provided in the second inspection area 12, marking B1 is provided in the third inspection area 13, and marking B is provided in the fourth inspection area 14. These markings can be formed by laser engraving the cell 100 at an upstream process location.

[0104] A first inspection device 2 is also installed at the upstream process location. The first inspection device 2 includes a first upper right inspection member 21. When the first inspection device 2 is positioned relative to the battery cell 100, the first upper right inspection member 21 is positioned relative to the second inspection area 12. The inspection member can only detect conditions within the corresponding inspection area. Because the identification mark is engraved on the battery cell 100 by a laser device before the first inspection device 2 is inspected, the first upper right inspection member 21 of the first inspection device 2 can read the identification mark A.

[0105] After going through some processes, the battery cell 100 is transported to the downstream process position, where a second detection device 3 is provided. The second detection device 3 includes a second upper right detection component 31. When the first detection device 2 corresponds to the battery cell 100, the second upper right detection component 31 corresponds to the detection area in the upper right position among the four detection areas of the battery cell 100. The detection component can also only detect the situation within the corresponding detection area.

[0106] In an ideal situation where the orientation of the battery cell 100 does not change, the second upper right detection member 31 of the second detection device 3 can read the mark A.

[0107] When the battery cell 100 is rotated 90 degrees in the clockwise direction, the second upper right detection member 31 of the second detection device 3 can read the mark A1.

[0108] When the battery cell 100 rotates 180 degrees in the clockwise direction, the second upper right detection member 31 of the second detection device 3 can read the mark B.

[0109] When the battery cell 100 rotates 270 degrees in the clockwise direction, the second upper right detection member 31 of the second detection device 3 can read the mark B1.

[0110] This solution uses only one detection component to accurately determine the orientation change of the battery cell 100.

[0111] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A method for detecting changes in the orientation of a solar cell, characterized in that: include: Setting a plurality of detection areas on the battery cell, and setting a mark containing information in one of the detection areas; Using a first detection device to detect at least one detection area on the battery cell at an upstream process position specifically includes: using the first detection device to detect each detection area on the battery cell; The first detection device includes a plurality of first detection members, and the plurality of first detection members are arranged in a one-to-one correspondence with the plurality of detection areas; Using a second inspection device to inspect at least one inspection area on the battery cell at a downstream process position specifically includes: using the second inspection device to inspect each inspection area on the battery cell; The second detection device includes a plurality of second detection members, and the plurality of second detection members are arranged in a one-to-one correspondence with the plurality of detection areas; The management system analyzes the change in orientation of the battery cell based on the information detected by the first detection device and the second detection device.

2. A method for detecting changes in the orientation of a solar cell, characterized in that: include: Four detection areas are set on the battery cell, and the four detection areas are set on the battery cell in a centrally symmetrical manner. In two of the detection areas that are set diagonally, each is provided with a mark containing different information; Using a first detection device to detect at least one of the detection areas on the battery cell at an upstream process position specifically includes: using the first detection device to detect one of the detection areas on the battery cell; The first detection device includes a plurality of first detection members, and the plurality of first detection members are arranged in a one-to-one correspondence with the plurality of detection areas; Using a second inspection device to inspect at least one inspection area on the battery cell at a downstream process position specifically includes: using the second inspection device to inspect one of the inspection areas on the battery cell; The second detection device includes a plurality of second detection members, and the plurality of second detection members are arranged in a one-to-one correspondence with the plurality of detection areas; The management system analyzes the change in orientation of the battery cell based on the information detected by the first detection device and the second detection device.

3. A method for detecting changes in the orientation of a solar cell, characterized in that: include: Four detection areas are set on the battery cell, and the four detection areas are set on the battery cell in a centrally symmetrical manner. A mark containing different information is set in each of the four detection areas; Using a first detection device to detect at least one of the detection areas on the battery cell at an upstream process position specifically includes: using the first detection device to detect one of the detection areas on the battery cell; The first detection device includes a plurality of first detection members, and the plurality of first detection members are arranged in a one-to-one correspondence with the plurality of detection areas; Using a second inspection device to inspect at least one inspection area on the battery cell at a downstream process position specifically includes: using the second inspection device to inspect one of the inspection areas on the battery cell; The second detection device includes a plurality of second detection members, and the plurality of second detection members are arranged in a one-to-one correspondence with the plurality of detection areas; The management system analyzes the change in orientation of the battery cell based on the information detected by the first detection device and the second detection device.

4. The method for detecting a change in orientation of a solar cell according to any one of claims 1 to 3, wherein: The logo is set on the battery cell by laser processing.

5. The method for detecting a change in orientation of a solar cell according to any one of claims 1 to 3, wherein: The first detection device and / or the second detection device is an optical code reader.

6. The method for detecting a change in orientation of a solar cell according to claim 5, wherein: The logo is a QR code.

7. The method for detecting a change in orientation of a solar cell according to claim 5, wherein: The identifier is a barcode.

8. The method for detecting a change in orientation of a solar cell according to any one of claims 1 to 3, wherein: The first detection device and / or the second detection device is a CCD camera.

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