Laser processing platform

Abstract

The application discloses a laser processing platform and belongs to the technical field of photovoltaic cell processing equipment. The laser processing platform comprises a detection mechanism, a feeding mechanism, a first laser processing mechanism, a second laser processing mechanism, a discharging mechanism and a discharging receiving mechanism. The feeding mechanism drives the carrier to move to the feeding position, the first processing position, the second processing position and the discharging position in sequence by using a driving element. The first laser processing mechanism is arranged at the first processing position, and the second laser processing mechanism is arranged at the second processing position. The carrier receives the battery piece when moving to the feeding position. When moving to the first processing position and the second processing position, the carrier can be subjected to contact optimization processing by the first laser processing mechanism and the second processing mechanism arranged at the corresponding positions respectively. The qualified battery piece can be subjected to twice contact optimization processing, so that the ohmic contact between the grid line and the battery piece can be fully strengthened, and the contact resistance can be fully reduced, which helps to improve the performance of the solar cell.

Description

Technical Field

[0001] The embodiments of this application relate to the field of photovoltaic cell processing equipment technology, and more specifically, this application relates to a laser processing platform. Background Technology

[0002] Solar cells are the core component of solar cell modules. After the grid lines are formed on the solar cells, the contact resistance between the grid lines and the cells is often high due to poor ohmic contact. The industry generally optimizes this contact resistance by strengthening the ohmic contact through laser scanning. Specifically, an external power supply and a laser are used. The two poles of the external power supply are electrically connected to the positive and negative grid lines of the solar cell, respectively, and a deflection voltage is applied to the cell. Simultaneously, the laser emits a laser beam that sweeps across the grid lines on the solar cell, thereby improving the photoelectric conversion efficiency of the solar cell.

[0003] Currently, in the production of solar cells, laser processing mechanisms are generally used to perform contact optimization treatment on all cells to be processed. However, some cells have defects and do not meet the cell requirements of the module even after contact optimization treatment; moreover, contact optimization treatment is energy-intensive, and these defective cells will waste a lot of energy and increase production costs. Utility Model Content

[0004] This application aims to address at least one of the technical problems existing in the prior art. To this end, this application provides a laser processing platform that can achieve sufficient contact optimization processing on solar cells, sufficiently strengthening the ohmic contact between the grid lines and the solar cells, and sufficiently reducing the contact resistance.

[0005] To solve the above problems, the technical solution adopted in this application is as follows:

[0006] In a first aspect, an example of this application provides a laser processing platform, which includes a detection mechanism, a feeding mechanism, a first laser processing mechanism, a second laser processing mechanism, a unloading mechanism, and an unloading receiving mechanism, wherein:

[0007] The feeding mechanism includes a driving component and a carrier component. The driving component drives the carrier component to move sequentially to the loading position, the first processing position, the second processing position, and the unloading position. The first laser processing mechanism is located at the first processing position, and the second laser processing mechanism is located at the second processing position. The detection mechanism is located in front of the first laser processing mechanism. The detection mechanism includes at least one of an appearance detection component, a PL detection component, and an EL detection component. The detection mechanism is used to detect the passing solar cells and determine whether the passing solar cells are qualified or unqualified.

[0008] When the carrier moves to the loading position, it receives the battery cell; when the carrier moves to the first processing position, if the battery cell is a qualified battery cell, the first laser processing mechanism is used to perform contact optimization processing on the battery cell located at the first processing position. After the contact optimization processing is completed, when the carrier moves to the second processing position, the second laser processing mechanism is used to perform contact optimization processing on the battery cell again. After the contact optimization processing is completed, the carrier is also used to transport the battery cell to the unloading position.

[0009] The unloading mechanism is located near the unloading position. The unloading mechanism picks up the battery cells located at the unloading position and transports them to the unloading receiving mechanism.

[0010] The laser processing platform provided in this application uses a driving component to drive a carrier component to move sequentially to a loading position, a first processing position, a second processing position, and a unloading position. A first laser processing mechanism is set at the first processing position, and a second laser processing mechanism is set at the second processing position. When the carrier component moves to the loading position, it receives solar cells. When it moves to the first processing position and the second processing position, the first laser processing mechanism and the second laser processing mechanism set at the corresponding positions can respectively perform contact optimization processing on the qualified solar cells received on the carrier component. After two contact optimization processes, the qualified solar cells can fully strengthen the ohmic contact between the grid lines and the solar cells, thereby significantly reducing the contact resistance, which helps to improve the performance of solar cells.

[0011] According to some examples of the first aspect of this application, the loading position, the first processing position, the second processing position, and the unloading position are evenly distributed on a circumference with the center of the movement trajectory of the carrier as the center. The feeding mechanism includes 4 carriers, which are evenly distributed on the circumference. When the driving member drives the carrier to rotate 90°, the 4 carriers rotate from one of the loading position, the first processing position, the second processing position, and the unloading position to the next position.

[0012] The loading position, first processing position, second processing position, and unloading position are evenly distributed around a circle centered on the rotation center of the carrier. The four carriers are driven to rotate by a drive unit. Each of the four carriers can move from one of the loading position, first processing position, second processing position, and unloading position to the next, that is, alternately occupy the loading position, first processing position, second processing position, and unloading position. The carried solar cells can be driven to rotate to the first processing position and second processing position to perform two contact optimization processes. This improves the handling efficiency of solar cells and helps to shorten the contact optimization process cycle of the entire batch of solar cells.

[0013] According to some examples of the first aspect of this application, the carrier supports multiple sets of solar cells, the multiple sets of solar cells are arranged along a first direction at the loading position, and each set of solar cells includes at least two solar cells side by side.

[0014] Both the first laser processing mechanism and the second laser processing mechanism include a laser, a lifting module, an external power supply, and a push plate, with the external power supply and push plate located above the lifting module.

[0015] The driving component includes a drive shaft and a turntable. The turntable is mounted on the drive shaft and located above the lifting module, external power supply, and push plate. The turntable rotates under the drive of the drive shaft.

[0016] The carrier includes a probe plate and a carrier plate. The carrier plate is set on a turntable and moves with the rotation of the turntable. The carrier plate is used to support multiple sets of battery cells. Multiple guide channels are formed on the carrier plate. The probe plate is set below the carrier plate in a height-adjustable manner. The probe plate is provided with connecting electrodes and multiple probes. The probes are set one-to-one with the guide channels and the probes are connected to the connecting electrodes.

[0017] The carrier component enables simultaneous transport and contact optimization of multiple solar cells in a single operation, shortening the solar cell processing cycle. It is suitable for large-scale solar cell processing, particularly for laser-scanned optimization of ohmic contact in half-sheet solar cells. Both the first and second laser processing mechanisms include a lifting module, an external power supply, and a pusher plate. When the carrier plate carries multiple sets of solar cells to their corresponding first or second processing positions, the lifting module drives the external power supply and pusher plate upwards, connecting the external power supply electrode to the probe plate's connection electrode. The pusher plate then pushes the probe plate upwards until the probe passes through the corresponding guide channel (composed of a through hole formed on the carrier plate and a ceramic needle sleeve installed in the through hole) and contacts the solar cell's electrode. The external power supply then applies a reverse voltage to the solar cell, and contact optimization is performed under these conditions.

[0018] According to some examples of the first aspect of this application, the unloading mechanism includes an unloading rotating component and an unloading conveying component driven by the unloading rotating component. The unloading conveying component is provided with adsorption elements, each adsorption element corresponding one-to-one with a battery cell in a plurality of battery cells, and each adsorption element independently adsorbs and releases a battery cell. The unloading receiving mechanism includes a first unloading receiving component and a second unloading receiving component. The first unloading receiving component is used to receive qualified battery cells, and the second unloading receiving component is used to receive unqualified battery cells. The unloading rotating component drives the unloading conveying component to move between the unloading position, the first unloading receiving component, and the second unloading receiving component. When the unloading receiving mechanism moves to the unloading position, the unloading conveying component picks up the plurality of battery cells located at the unloading position. When the unloading receiving mechanism moves to the first unloading receiving component, the unloading conveying component releases the qualified battery cells from the plurality of battery cells. When the unloading receiving mechanism moves to the second unloading receiving component, the unloading conveying component releases the unqualified battery cells from the plurality of battery cells.

[0019] The unloading rotating component drives the unloading conveyor to rotate. The unloading conveyor picks up multiple sets of battery cells that have undergone contact optimization processing from the unloading position. When the unloading conveyor moves to the first unloading receiving component and the second unloading receiving component, it releases the qualified battery cells and the unqualified battery cells, respectively.

[0020] In a second aspect, an example of this application provides a laser processing platform, which includes a detection mechanism, a feeding mechanism, a first laser processing mechanism, a positioning mechanism, a second laser processing mechanism, and a loading / unloading mechanism, wherein:

[0021] The testing organization is located in front of the feeding mechanism. The testing organization is used to test the passing solar cells and determine whether the passing solar cells are qualified or unqualified.

[0022] The feeding mechanism includes a driving component and a carrier component. The driving component drives the carrier component to move sequentially to the first station, the second station, the third station, and the fourth station. The first laser processing mechanism is located at one of the second and third stations, and the positioning mechanism is located at the other of the second and third stations. The positioning mechanism is used to obtain the grid line position information of the qualified solar cells. The second laser processing mechanism is located at the fourth station. One of the first and second laser processing mechanisms is used to perform contact optimization processing on the qualified solar cells based on the grid line position information, and the other of the first and second laser processing mechanisms is used to perform contact optimization processing on the qualified solar cells.

[0023] The loading and unloading mechanism is located next to the feeding mechanism. The loading and unloading mechanism is used to pick up at least one set of battery cells to be unloaded at the loading and unloading station and place the battery cells to be unloaded to the subsequent conveyor line, as well as to pick up at least one set of battery cells to be processed and place them on the carrier located at the loading and unloading station.

[0024] In the second example, the laser processing platform loads and unloads solar cells at the first station and is equipped with two laser processing mechanisms, a first laser processing mechanism and a second laser processing mechanism, to perform contact optimization processing. One processing mechanism directly performs contact optimization processing on qualified solar cells, while the other processing mechanism performs contact optimization processing based on position information. After two contact optimization processes, qualified solar cells can have their ohmic contact between the grid lines and the solar cell strengthened, thereby significantly reducing contact resistance, which helps to improve the performance of solar cells.

[0025] According to some examples of the second aspect of this application, the testing organization includes at least one of an appearance testing component, a PL testing component, and an EL testing component.

[0026] The use of appearance inspection components, PL inspection components, and EL inspection components facilitates the inspection of solar cells to ensure that they are qualified.

[0027] According to some examples of the second aspect of this application, the first station, the second station, the third station and the fourth station are evenly distributed on a circle with the center of the movement trajectory of the carrier as the center.

[0028] The first, second, third, and fourth workstations are evenly distributed around a circle centered on the rotation center of the carrier. A drive unit rotates the carrier, allowing it to move from one workstation to the next. This driven rotation of the carrier carrying the solar cells enables two rounds of contact optimization.

[0029] According to some examples of the second aspect of this application, the feeding mechanism includes four carriers that are evenly distributed on the circumference. When the driving member drives the carriers to rotate 90°, the four carriers rotate from one of the first, second, third and fourth stations to the next station.

[0030] Four carriers are set up, which can alternately be located at the first, second, third and fourth workstations, improving the handling efficiency of solar cells and helping to shorten the contact optimization processing cycle of the entire batch of solar cells.

[0031] According to some examples of the second aspect of this application, the loading and unloading mechanism includes a first linear motor, a first adsorption component, a second linear motor, and a second adsorption component;

[0032] The first adsorption component is disposed at the drive end of the first linear motor. The first adsorption component is driven by the first linear motor to reciprocate between the battery cell feeding position and the first working position. When moving to the feeding position, the first adsorption component adsorbs at least one set of battery cells. When moving to the first working position, the first adsorption component releases at least one set of battery cells onto the carrier located at the first working position.

[0033] The second adsorption component is disposed at the drive end of the second linear motor. Driven by the second linear motor, the second adsorption component reciprocates between the first station and the subsequent conveyor line. When moving to the first station, the second adsorption component adsorbs at least one set of battery cells to be unloaded from the carrier. When moving to the subsequent conveyor line, the second adsorption component releases at least one set of battery cells to be unloaded onto the subsequent conveyor line.

[0034] A first linear motor drives a first adsorption component to reciprocate between the feeding position and the first workstation, facilitating accurate and stable transfer of the battery cells from the feeding position to the carrier. A second linear motor drives a second adsorption component to reciprocate between the first workstation and the subsequent conveyor line, achieving unloading.

[0035] According to some examples of the second aspect of this application, the positioning mechanism includes multiple transparent platforms, a position recognition camera, and multiple position adjustment components. The transparent platforms are connected to the position adjustment mechanisms in a one-to-one correspondence, and each transparent platform carries one of the multiple sets of battery cells. The position recognition camera is set below the transparent platform to take pictures and obtain the grid line position information of each battery cell in the multiple sets of battery cells.

[0036] A position recognition camera is positioned below the transparent platform to easily identify the position of the battery cells carried by each transparent platform. The position adjustment mechanism can adjust the position of the transparent platform, thereby adjusting each battery cell to a predetermined position to facilitate contact optimization processing. Attached Figure Description

[0037] Figure 1 A top view schematic diagram of a first type of laser processing platform provided in an embodiment of this application;

[0038] Figure 2 This is a schematic diagram of a feeding mechanism provided in an embodiment of this application;

[0039] Figure 3 A structural diagram showing the assembly of the lifting module, push plate, and receiving component;

[0040] Figure 4 A top view schematic diagram of a second laser processing platform provided in an embodiment of this application;

[0041] Figure 5 This is a top view schematic diagram of a third laser processing platform provided in an embodiment of this application.

[0042] In the picture:

[0043] 101. Loading position; 102. First processing position; 103. Second processing position; 104. Unloading position; 105. First station; 106. Second station; 107. Third station; 108. Fourth station; 109. Feeding position;

[0044] 200. Feeding mechanism; 300. First laser processing mechanism; 400. Second laser processing mechanism; 500. Loading mechanism; 600. Unloading mechanism; 700. Unloading receiving mechanism; 800. Positioning mechanism; 900. Loading and unloading mechanism;

[0045] 210, Supporting component; 211, Supporting plate; 212, Probe plate; 212a, Probe; 212b, Driven plate; 220, Driving component; 221, Drive shaft; 222, Turntable;

[0046] 301. Lifting module; 302. External power supply; 303. Push plate;

[0047] 601. Material handling parts;

[0048] 701. First material receiving component; 702. Second material receiving component. Detailed Implementation

[0049] The technical solutions of the embodiments of this disclosure will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this disclosure. All other embodiments obtained by those skilled in the art based on the embodiments of this disclosure without creative effort are within the scope of protection of this disclosure.

[0050] like Figure 1 , Figure 2 and Figure 3 As shown, a laser processing platform according to the first embodiment of this application includes a detection mechanism, a feeding mechanism 200, a first laser processing mechanism 300, a second laser processing mechanism 400, a unloading mechanism 600, and an unloading receiving mechanism 700. The above-mentioned structural components will be described in detail below with reference to the accompanying drawings.

[0051] The feeding mechanism 200 includes a driving member 220 and a carrier member 210. The carrier member 210 can be constructed as a plate-like structure with a certain thickness and has a surface for carrying batteries. The driving member 220 drives the carrier member 210 to move, and the carrier member 210 moves sequentially to the loading position 101, the first processing position 102, the second processing position 103, and the unloading position 104. A loading mechanism 500 can be configured at the loading position 101 to load the battery cells. A first laser processing mechanism 300 is set at the first processing position 102, a second laser processing mechanism 400 is set at the second processing position 103, and the battery cells are unloaded at the unloading position 104. In addition, a detection mechanism is located before the first laser processing mechanism 300 to pre-judge each battery cell, thereby determining the battery cells that need to be processed. The detection mechanism includes at least one of an appearance inspection component, a PL inspection component, and an EL inspection component. The detection mechanism is used to inspect the passing battery cells and determine whether the passing battery cells are qualified or unqualified.

[0052] When the carrier 210 is at the loading position 101, the first processing position 102, the second processing position 103, and the unloading position 104, the relevant structural components perform different operations, as follows: When the carrier 210 moves to the loading position 101, it receives the battery cells transported by the loading mechanism 500. The received battery cells then move sequentially through the first processing position 102, the second processing position 103, and the unloading position 104 as the carrier 210 moves. When the carrier 210 moves to the first processing position 102, if the battery cell is a qualified battery cell, the first laser processing mechanism 300 performs contact optimization processing on the battery cell located at the first processing position 102. After the contact optimization processing is completed, when the carrier 210 moves to the second processing position 103, the second laser processing mechanism 400 performs contact optimization processing on the battery cell again. After the contact optimization processing is completed, the carrier 210 also transports the battery cell to the unloading position 104.

[0053] For the aforementioned unloading mechanism 600 and unloading receiving mechanism 700, in order to facilitate the unloading of battery cells at the unloading position 104, the unloading mechanism 600 is located close to the unloading position 104. The battery cells that move to the unloading position 104 with the carrier 210 are picked up by the unloading mechanism 600, and the unloading mechanism 600 transports the picked-up battery cells to the unloading receiving mechanism 700.

[0054] In this embodiment, the laser processing platform uses a drive unit 220 to drive a carrier unit 210, causing the carrier unit 210 to move sequentially to a loading position 101, a first processing position 102, a second processing position 103, and a unloading position 104. A first laser processing mechanism 300 is set at the first processing position 102, and a second laser processing mechanism 400 is set at the second processing position 103. When the carrier unit 210 moves to the loading position 101, it receives a solar cell. When it moves to the first processing position 102 and the second processing position 103, the first laser processing mechanism 300 and the second laser processing mechanism 400, respectively, perform contact optimization processing on the qualified solar cells received on the carrier unit 210. Therefore, the qualified solar cells undergo two contact optimization processes, which effectively strengthens the ohmic contact between the grid lines and the solar cell. The voltage used in the second contact optimization process is higher than that used in the first contact optimization process, thereby fully optimizing the ohmic contact, reducing contact resistance, and improving the performance of the solar cell.

[0055] Regarding the load-bearing component 210

[0056] Reference Figure 2 and combined Figure 1As shown, in some embodiments, the carrier 210 has a rotation center, which is the center of the movement trajectory of the carrier 210. The loading position 101, the first processing position 102, the second processing position 103, and the unloading position 104 are evenly distributed on a circumference centered on the movement trajectory center. The feeding mechanism 200 includes four carriers 210, which are evenly distributed on the circumference. When the driving member 220 drives the carrier 210 to rotate 90°, all four carriers 210 move from the loading position to the unloading position. The material loading position 101, the first processing position 102, the second processing position 103, and the unloading position 104 rotate to the next position. The four carriers 210 alternately occupy the loading position 101, the first processing position 102, the second processing position 103, and the unloading position 104. The carried solar cells can then be driven to rotate to the first processing position 102 and the second processing position 103 for two rounds of contact optimization processing. This improves the handling efficiency of the solar cells and helps shorten the contact optimization processing cycle for the entire batch of solar cells. For example, the four carriers 210 are constructed on a turntable structure in the above-described evenly distributed manner. The driving member 220 is connected to the center of the turntable structure and drives the turntable structure to rotate in a plane. Therefore, the four carriers 210 can alternately occupy the loading position 101, the first processing position 102, the second processing position 103, and the unloading position 104.

[0057] Reference Figure 1 As shown, in a specific implementation of this application, the carrier 210 supports multiple sets of solar cells. The multiple sets of solar cells are arranged in the loading position 101 along the first direction (the first direction can be understood as the conveying direction when the solar cells are fed). Each set of solar cells includes at least two solar cells arranged side by side. In a specific implementation, the solar cells supported by the carrier 210 in the loading position 101 can be two, three or more sets. The number of solar cells arranged side by side in each set can also be two, three or more. The carrier 210 supports multiple sets of solar cells at one time, that is, it realizes the synchronous handling and contact optimization of multiple solar cells. This shortens the solar cell processing cycle and is suitable for large-scale solar cell processing, especially for the laser scanning enhancement of ohmic contact optimization of half solar cells.

[0058] Regarding the first laser processing unit 300 and the second laser processing unit 400

[0059] Combination Figure 1 , Figure 2 and Figure 3As shown, both the first laser processing mechanism 300 and the second laser processing mechanism 400 include a laser (not shown in the figure, but roughly configured adjacent to the first processing position 102 and the second processing position 103 to facilitate laser scanning of the battery cells), a lifting module 301, an external power supply 302, and a push plate 303. The external power supply 302 and the push plate 303 are located above the lifting module 301. The driving component 220 includes a drive shaft 221 and a turntable 222. The turntable 222 is mounted on the drive shaft 221 and located above the lifting module 301, the external power supply 302, and the push plate 303. The turntable 222 is driven by the drive shaft 221 to rotate; the support member 210 includes a probe plate 212 and a support plate 211. The support plate 211 is set on the turntable 222 and moves with the rotation of the turntable 222. The support plate 211 is used to support multiple sets of battery cells. Multiple guide channels are formed on the support plate 211. The probe plate 212 is set below the support plate 211 in a height-adjustable manner. The probe plate 212 is provided with a connecting electrode (not shown in the figure) and multiple probes 212a. The probes 212a are arranged one-to-one with the guide channels and are connected to the connecting electrodes.

[0060] When the support plate 211 carries multiple sets of battery cells and moves to the corresponding first processing position 102 or second processing position 103 for contact optimization processing, since the external power supply 302 and push plate 303 of the first laser processing mechanism 300 are located at the first processing position 102, and the external power supply 302 and push plate 303 of the second laser processing mechanism 400 are located at the first processing position 103, the corresponding first laser processing mechanism 300 and second laser processing mechanism 400 can use the lifting module 301 to drive the external power supply 302 and push plate 303 to rise, so that the external power supply 302... The electrode of 2 is connected to the connecting electrode, and the pusher plate 303 pushes the probe plate 212 up until the probe 212a passes through the guide channel (it should be understood that a driven plate 212b can be provided on the lower surface of the probe plate 212 to contact the pusher plate 303 and be pushed by the pusher plate 303). After the probe 212a passes through the guide channel, it abuts against the electrode of each cell. The external power supply 302 can then apply a reverse voltage to the cell. The laser sweeps a certain surface or the grid line of the surface of a qualified cell that has been subjected to a reverse voltage in multiple groups of cells. That is, the laser performs contact optimization processing in this state.

[0061] For example, the guide channel is formed by a through hole formed on the carrier plate 211 and an insulating ceramic needle sleeve installed in the through hole. The upper end of the ceramic needle sleeve extends upward to be flush with the surface of the carrier 210 used to carry the battery. The ceramic needle sleeve can provide vertical guidance for the probe 212a and prevent the probe 212a from directly contacting the carrier 210, which could lead to production accidents.

[0062] Regarding the material feeding mechanism 600

[0063] Reference Figure 1 As shown, the unloading mechanism 600 includes an unloading rotating component and an unloading conveying component 601 driven by the unloading rotating component. The unloading conveying component 601 is provided with an adsorption element (e.g., a Bernoulli suction cup). The adsorption element is configured to correspond one-to-one with the battery cells in the multiple sets of battery cells, and each adsorption element independently adsorbs and releases the corresponding battery cell. The unloading receiving mechanism 700 includes a first unloading receiving component 701 and a second unloading receiving component 702. The first unloading receiving component 701 is used to receive qualified battery cells, and the second unloading receiving component 702 is used to receive unqualified battery cells. The unloading rotating component drives the unloading conveying component 601 to move between the unloading position 104, the first unloading receiving component 701, and the second unloading receiving component 702. When the unloading receiving mechanism 700 moves to the unloading position 104, the unloading conveying component 601 picks up multiple groups of battery cells located at the unloading position 104. At this time, each adsorption element adsorbs one battery cell. When the unloading receiving mechanism 700 moves to the first unloading receiving component 701, the unloading conveying component 601 releases the qualified battery cells from the multiple groups of battery cells. When the unloading receiving mechanism 700 moves to the second unloading receiving component 702, the unloading conveying component 601 releases the unqualified battery cells from the multiple groups of battery cells. The unloading rotating component drives the unloading conveyor 601 to rotate. The unloading conveyor 601 picks up multiple groups of battery cells that have completed contact optimization treatment from the unloading position 104, and releases the qualified and unqualified battery cells respectively.

[0064] The second embodiment of this application also provides a laser processing platform, which further describes the structural arrangement of implementing two contact optimization processes using two laser processing mechanisms. The following is a description of this arrangement in conjunction with... Figure 4 , Figure 5 And refer to Figures 1 to 3 The aforementioned structural components are described in detail. This laser processing platform includes a detection mechanism, a feeding mechanism 200, a first laser processing mechanism 300, a positioning mechanism 800, a second laser processing mechanism 400, and a loading / unloading mechanism 900.

[0065] The inspection mechanism is set up in front of the feeding mechanism 200 to pre-judge each solar cell. The solar cells are inspected by the inspection mechanism and then transported to the feeding mechanism 200. The inspection mechanism is set up on the conveying path of the solar cells and is used to inspect the passing solar cells and determine whether the passing solar cells are qualified or unqualified. It can be understood that the inspection mechanism includes at least one of the following: appearance inspection component, PL inspection component, and EL inspection component.

[0066] The feeding mechanism 200 includes a drive component 220 and a carrier component 210 (combined) Figure 2As shown), the driving component 220 drives the carrier component 210 to move sequentially to the first station 105, the second station 106, the third station 107, and the fourth station 108. The first laser processing mechanism 300 is located at the second station 106, and the positioning mechanism 800 is located at the third station 107. The positioning mechanism 800 is used to obtain the grid line position information of the qualified battery cell. The second laser processing mechanism 400 is located at the fourth station 108. (Refer to...) Figure 4 As shown. Furthermore, the first laser processing unit 300 performs contact optimization processing on the passed qualified solar cells, and the second laser processing unit 400 performs contact optimization processing on the passed qualified solar cells based on the grid line position information. The first processing unit directly performs contact optimization processing on the qualified solar cells, while the second processing unit performs contact optimization processing based on the position information. By performing two contact optimization processes, the ohmic contact between the grid lines and the solar cell can be sufficiently strengthened, thereby significantly reducing the contact resistance, which helps to improve the performance of the solar cell.

[0067] In practical implementation, the positioning mechanism 800 can be set at the second station 106, while the first laser processing mechanism 300 can be set at the third station 107, as shown in the reference. Figure 5 As shown, this arrangement allows one processing unit to directly perform contact optimization on qualified solar cells, while another processing unit performs contact optimization based on location information. Qualified solar cells undergo two contact optimization processes. It's understandable that the two contact optimization processes differ: one does not require precise laser scanning of the grid lines, while the other requires precise laser scanning of the grid lines based on their location information to achieve contact optimization.

[0068] The aforementioned loading and unloading mechanism 900 is located beside the feeding mechanism 200. The loading and unloading mechanism 900 is used to pick up a group of battery cells to be unloaded at the first station 105 and place the battery cells to be unloaded on the subsequent conveyor line to complete the unloading of the battery cells. The loading and unloading mechanism 900 is also used to pick up a group of battery cells to be processed and place them on the carrier 210 located at the first station 105 to complete the loading of the battery cells.

[0069] In some embodiments, the carrier 210 has a rotation center, which is the center of the movement trajectory of the carrier 210. The first station 105, the second station 106, the third station 107, and the fourth station 108 are evenly distributed on a circumference centered on the movement trajectory center. With this arrangement, when the carrier 210 is driven to rotate by the drive member 220, the carrier 210 can move from one of the loading station 101, the first processing station 102, the second processing station 103, and the unloading station 104 to the next. The carrier 210 carrying the battery cell can be driven to rotate to the first processing station 102 and the second processing station 103 to perform two contact optimization processes.

[0070] In some embodiments, the feeding mechanism 200 includes four carriers 210, which are evenly distributed on the circumference. When the driving member 220 drives the carriers 210 to rotate 90°, each of the four carriers 210 rotates from one of the first station 105, the second station 106, the third station 107, and the fourth station 108 to the next station. The four carriers 210 alternately occupy the loading station 101, the first processing station 102, the second processing station 103, and the unloading station 104, which improves the handling efficiency of the solar cells and helps to shorten the contact optimization processing cycle of the entire batch of solar cells. For example, the four carriers 210 are constructed on a turntable structure in the above evenly distributed manner. The driving member 220 is connected to the center of the turntable structure and drives the turntable structure to rotate in the plane. Therefore, the four carriers 210 can alternately occupy the first station 105, the second station 106, the third station 107, and the fourth station 108.

[0071] In some embodiments, the loading and unloading mechanism 900 includes a first linear motor and a first adsorption component (e.g., a Bernoulli suction cup), as well as a second linear motor and a second adsorption component (e.g., a Bernoulli suction cup). The first adsorption component is disposed at the drive end of the first linear motor and is driven by the first linear motor to reciprocate between the feed position 109 and the first station 105. The feed position 109 is disposed on the conveying path of the battery cells. The battery cells at the feed position 109 are received by the carrier 210. This configuration of the feed position 109 facilitates the continuity of battery cell conveying. When the first adsorption component moves to the feed position 109, it adsorbs the battery cells located at the feed position 109 (e.g., adsorbs one or two sets of battery cells). When the first adsorption component moves to the first station 105, it releases the battery cells onto the carrier 210 at the first station 105. A first adsorption component is driven by a first linear motor to reciprocate between the feed position 109 and the first station 105, facilitating accurate and stable transfer of the battery cells from the feed position 109 to the carrier 210. A second adsorption component is located at the drive end of a second linear motor. Driven by the second linear motor, the second adsorption component reciprocates between the first station and the subsequent conveyor line. When moving to the first station, the second adsorption component adsorbs at least one set of battery cells to be unloaded from the carrier. When moving to the subsequent conveyor line, the second adsorption component releases at least one set of battery cells to be unloaded onto the subsequent conveyor line, thus unloading the battery cells that have undergone contact optimization treatment.

[0072] The laser processing platform includes a conveying mechanism for transporting groups of solar cells along a first direction to the feeding position 109. This mechanism allows for efficient group transport of solar cells. The conveying mechanism includes a conveyor line, a material box, and a conveying and transporting unit. The material boxes are located on both sides of the conveyor line. The conveying and transporting unit is used to transport solar cells from the conveyor line to the material box, and / or from the material box to the conveyor line. The coordination of the conveyor line, material box, and conveying and transporting unit facilitates adaptation to different process requirements, enabling direct transport of solar cells for inspection, pick-and-place, and contact optimization treatment, or storage in the material box followed by transport to the conveyor line for inspection, pick-and-place, and contact optimization treatment. The aforementioned inspection mechanism can be arranged across the conveyor line, allowing the solar cells to be inspected before reaching the feeding position.

[0073] In addition, multiple feeding positions 109 are provided on the conveying path of the conveying mechanism. Each feeding position 109 corresponds to a group of solar cells, and each feeding position 109 is equipped with a straightening mechanism. When multiple adjacent groups of solar cells are located at a single feeding position 109, each straightening mechanism is used to straighten the position of the solar cells in the same group. After the position straightening is completed, the loading and unloading mechanism 900 picks up multiple groups of solar cells. Setting multiple feeding positions 109 and configuring corresponding straightening mechanisms on the conveying path allows for the straightening of the position of the solar cells in the same group at each feeding position 109, facilitating accurate picking and handling, as well as the determination of grid line position information and the implementation of laser scanning.

[0074] In some embodiments, the positioning mechanism 800 includes multiple transparent platforms, a position recognition camera, and multiple position adjustment components. Each transparent platform is connected to a corresponding position adjustment mechanism. For example, the position adjustment mechanism can use a UVW adjustment platform to adjust the position of the transparent platforms. Each transparent platform carries one of multiple sets of battery cells. The position recognition camera is positioned below the transparent platform to take pictures and acquire the grid line position information of each battery cell in the multiple sets of battery cells.

[0075] The battery cells are moved to the positioning mechanism, where a position recognition camera located below the transparent platform identifies the position of each battery cell carried by the transparent platform. The position adjustment mechanism can adjust the position of the transparent platform, thereby adjusting each battery cell to a predetermined position to facilitate contact optimization processing.

[0076] It should be noted that the laser processing platforms described in the first and second embodiments above can be freely combined and disassembled to form new embodiments without conflict, and have the same beneficial effects. For the sake of brevity, these will not be elaborated further here. The laser processing platform described in the second embodiment involves structures such as the feeding mechanism 200, the first laser processing mechanism 300, and the second laser processing mechanism 400. For the sake of brevity, these will not be elaborated further here; those skilled in the art should refer to the description of the laser processing platform in the first embodiment for understanding.

[0077] In the foregoing description of this application, unless otherwise expressly specified and limited, the terms "fixed," "installed," "connected," or "linked" should be interpreted broadly. For example, the term "linked" can refer to a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium; or it can refer to the internal communication of two components or the interaction between two components. Therefore, unless otherwise expressly limited in this application, those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0078] Based on the above description of this application, those skilled in the art will also understand that the terms used, such as "upper," "lower," "front," "rear," "left," "right," "length," "width," "thickness," "vertical," "horizontal," "top," "bottom," "inner," "outer," "axial," "radial," "circumferential," "center," "longitudinal," "transverse," "clockwise," or "counterclockwise," are based on the orientation or positional relationship shown in the accompanying drawings of this application. They are only for the purpose of facilitating the explanation of the solution of this application and simplifying the description, and do not explicitly or implicitly suggest that the device or element involved must have the specific orientation, or be constructed and operated in a specific orientation. Therefore, the above-mentioned orientation or positional relationship terms should not be understood or interpreted as a limitation on the solution of this application.

[0079] Furthermore, the terms "first" or "second," etc., used in this application to refer to numbers or ordinal numbers are for descriptive purposes only and should not be construed as explicitly or implicitly indicating relative importance or specifying the number of indicated technical features. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this application, "multiple" means at least two, such as two, three, or more, unless otherwise explicitly specified.

[0080] While numerous embodiments of this application have been shown and described herein, it will be apparent to those skilled in the art that such embodiments are provided by way of example only. Many modifications, alterations, and alternatives will arise for those skilled in the art without departing from the spirit and intent of this application. It should be understood that various alternatives to the embodiments of this application described herein may be employed in the practice of this application. The appended claims are intended to define the scope of protection of this application and therefore cover equivalents or alternatives within the scope of these claims.

Claims

1. A laser processing platform, characterized in that, The laser processing platform includes a detection mechanism, a feeding mechanism, a first laser processing mechanism, a second laser processing mechanism, a unloading mechanism, and an unloading receiving mechanism, wherein: The feeding mechanism includes a driving component and a carrier component. The driving component drives the carrier component to move sequentially to the loading position, the first processing position, the second processing position, and the unloading position. The first laser processing mechanism is located at the first processing position, and the second laser processing mechanism is located at the second processing position. The detection mechanism is located in front of the first laser processing mechanism. The detection mechanism includes at least one of an appearance detection component, a PL detection component, and an EL detection component. The detection mechanism is used to detect the passing solar cells and determine whether the passing solar cells are qualified or unqualified. When the carrier moves to the loading position, it receives the battery cell; when the carrier moves to the first processing position, if the battery cell is a qualified battery cell, the first laser processing mechanism is used to perform contact optimization processing on the battery cell located at the first processing position. After the contact optimization processing is completed, when the carrier moves to the second processing position, the second laser processing mechanism is used to perform contact optimization processing on the battery cell again. After the contact optimization processing is completed, the carrier is also used to transport the battery cell to the unloading position. The feeding mechanism is located near the feeding position. The feeding mechanism picks up the battery cell located at the feeding position and transports it to the feeding receiving mechanism.

2. The laser processing platform according to claim 1, characterized in that, The loading position, the first processing position, the second processing position, and the unloading position are evenly distributed on a circumference with the center of the movement trajectory of the carrier as the center. The feeding mechanism includes four carriers, which are evenly distributed on the circumference. When the driving member drives the carrier to rotate 90°, all four carriers rotate from one of the loading position, the first processing position, the second processing position, and the unloading position to the next position.

3. The laser processing platform according to claim 1 or 2, characterized in that, The carrier supports multiple sets of battery cells, and the multiple sets of battery cells are arranged along a first direction at the feeding position. Each set of battery cells includes at least two battery cells arranged side by side. Both the first laser processing mechanism and the second laser processing mechanism include a laser, a lifting module, an external power supply, and a push plate, with the external power supply and the push plate located above the lifting module; The driving component includes a drive shaft and a turntable. The turntable is mounted on the drive shaft and located above the lifting module, the external power supply, and the push plate. The turntable rotates under the drive of the drive shaft. The carrier includes a probe plate and a carrier plate. The carrier plate is disposed on the turntable and moves with the rotation of the turntable. The carrier plate is used to support the multiple sets of battery cells. Multiple guide channels are formed on the carrier plate. The probe plate is vertically and vertically disposed below the carrier plate. The probe plate is provided with connecting electrodes and multiple probes. The probes are arranged in a one-to-one correspondence with the guide channels and are connected to the connecting electrodes.

4. The laser processing platform according to claim 3, characterized in that, The feeding mechanism includes a feeding rotary component and a feeding conveying component driven by the feeding rotary component. The feeding conveying component is equipped with adsorption elements, each of which corresponds one-to-one with a battery cell in the plurality of battery cells. Each adsorption element independently adsorbs and releases a battery cell. The feeding receiving mechanism includes a first feeding receiving component and a second feeding receiving component. The first feeding receiving component is used to receive qualified battery cells, and the second feeding receiving component is used to receive unqualified battery cells. The feeding rotary component drives the feeding conveying component to move between the feeding position, the first feeding receiving component, and the second feeding receiving component. When the feeding receiving mechanism moves to the feeding position, the feeding conveying component picks up the plurality of battery cells located at the feeding position. When the feeding receiving mechanism moves to the first feeding receiving component, the feeding conveying component releases the qualified battery cells from the plurality of battery cells. When the feeding receiving mechanism moves to the second feeding receiving component, the feeding conveying component releases the unqualified battery cells from the plurality of battery cells.

5. A laser processing platform, characterized in that, The laser processing platform includes a detection mechanism, a feeding mechanism, a first laser processing mechanism, a positioning mechanism, a second laser processing mechanism, and a loading / unloading mechanism, wherein: The detection mechanism is located in front of the feeding mechanism. The detection mechanism is used to detect the passing battery cells and determine whether the passing battery cells are qualified or unqualified. The feeding mechanism includes a driving component and a carrier component. The driving component drives the carrier component to move sequentially to a first station, a second station, a third station, and a fourth station. The first laser processing mechanism is located at one of the second station and the third station, and the positioning mechanism is located at the other of the second station and the third station. The positioning mechanism is used to obtain the grid line position information of the qualified solar cell. The second laser processing mechanism is located at the fourth station. One of the first laser processing mechanism and the second laser processing mechanism is used to perform contact optimization processing on the qualified solar cell based on the grid line position information. The other of the first laser processing mechanism and the second laser processing mechanism is used to perform contact optimization processing on the qualified solar cell. The loading and unloading mechanism is located beside the feeding mechanism. The loading and unloading mechanism is used to pick up at least one set of battery cells to be unloaded at the first station and place the battery cells to be unloaded on the subsequent conveyor line, and to pick up at least one set of battery cells to be processed and place them on the carrier located at the first station.

6. The laser processing platform according to claim 5, characterized in that, The testing organization includes at least one of an appearance testing component, a PL testing component, and an EL testing component.

7. The laser processing platform according to claim 5, characterized in that, The first workstation, the second workstation, the third workstation, and the fourth workstation are evenly distributed on a circle centered on the center of the movement trajectory of the carrier.

8. The laser processing platform according to claim 5, characterized in that, The feeding mechanism includes four carriers, which are evenly distributed on the circumference. When the driving member drives the carriers to rotate 90°, the four carriers rotate from one of the first station, the second station, the third station, and the fourth station to the next station.

9. The laser processing platform according to any one of claims 5 to 8, characterized in that, The loading and unloading mechanism includes a first linear motor, a first adsorption component, a second linear motor, and a second adsorption component; The first adsorption component is disposed at the drive end of the first linear motor. The first adsorption component is driven by the first linear motor to reciprocate between the battery cell feeding position and the first working position. When moving to the feeding position, the first adsorption component adsorbs at least one set of battery cells. When moving to the first working position, the first adsorption component releases the at least one set of battery cells onto the carrier located at the first working position. The second adsorption component is disposed at the drive end of the second linear motor. The second adsorption component is driven by the second linear motor to reciprocate between the first station and the downstream conveyor line. When moving to the first station, the second adsorption component adsorbs at least one set of battery cells to be unloaded from the carrier. When moving to the downstream conveyor line, the second adsorption component releases the at least one set of battery cells to be unloaded onto the downstream conveyor line.

10. The laser processing platform according to any one of claims 5 to 8, characterized in that, The positioning mechanism includes multiple transparent platforms, a position recognition camera, and multiple position adjustment components. The transparent platforms are connected to the position adjustment mechanisms in a one-to-one correspondence, and each transparent platform carries one of the multiple sets of battery cells. The position recognition camera is set below the transparent platform to take pictures and obtain the grid line position information of each battery cell in the multiple sets of battery cells.

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