Laser-induced sintering device and photovoltaic cell processing equipment

Abstract

The utility model discloses a laser-induced sintering device and photovoltaic cell processing equipment, the laser-induced sintering device comprises a bottom plate, a probe row and a laser module, the bottom plate is provided with an operation surface for placing a photovoltaic cell; the probe row is arranged in the operation surface, and the probe row is used for being in contact with an electrode in a first surface of a photovoltaic cell so as to supply power to the photovoltaic cell; the laser module is arranged on the side, away from the operation face, of the probe row and used for emitting laser beams to the second face of the photovoltaic cell, and then laser-induced sintering machining operation on the photovoltaic cell is achieved. By arranging the laser module and the probe row on the two sides of the photovoltaic cell, the shielding of the probe row on the laser beam emitted by the laser module can be reduced, and the induction sintering process effect on the cell piece is improved, so that the conversion efficiency of the photovoltaic cell is improved.

Description

Technical Field

[0001] The present application belongs to the field of photovoltaic technology, and specifically relates to a laser induced sintering device and photovoltaic cell processing equipment. Background Art

[0002] The contact resistance between the surface electrode and the silicon substrate of a solar cell has a great influence on the fill factor and conversion efficiency. The lower the contact resistance, the higher the fill factor and conversion efficiency. Reducing the contact resistance has become an urgent need for major battery manufacturers.

[0003] In order to reduce contact resistance, laser induced sintering technology is used in related technologies. The laser excites the battery carriers and flows in a directional manner under the action of the reverse voltage of the external electric field to form a loop. When the loop current flows through the metal-semiconductor interface, the contact resistance between metal and silicon is relatively large, which produces a more obvious thermal effect. The heat can further promote the mutual diffusion of metal and silicon to obtain excellent contact characteristics after sintering. However, when using existing laser induced sintering equipment for processing, structures such as probe rows and grid lines will affect laser irradiation and affect the processing effect. Utility Model Content

[0004] The present application aims to provide a laser induced sintering device and photovoltaic cell processing equipment, which can solve the problem that when using existing laser induced sintering equipment for processing, structures such as probe rows and grid lines will affect laser irradiation and affect the processing effect.

[0005] In order to solve the above technical problems, this application is implemented as follows:

[0006] In a first aspect, an embodiment of the present application provides a laser induced sintering device, comprising:

[0007] A bottom plate, wherein an operating surface is provided on the bottom plate for placing a photovoltaic cell, wherein the photovoltaic cell has a first surface and a second surface opposite to each other, and an electrode is provided in the first surface;

[0008] A probe row, the probe row being arranged in the operating surface and being used for contacting with the electrodes in the first surface to supply power to the photovoltaic cell;

[0009] A laser module is arranged on a side of the probe row away from the operating surface and is used for emitting a laser beam toward the second surface.

[0010] Optionally, the laser module includes: a laser transmitter, a laser galvanometer and a focusing field lens;

[0011] The laser emitter is arranged on the side of the probe row away from the operating surface, the laser galvanometer is arranged opposite to the laser emitter, and the focusing field lens is arranged on the side of the laser galvanometer close to the photovoltaic cell; the laser emitter is used to emit a laser beam, and the laser beam passes through the laser galvanometer and the focusing field lens in sequence and then is projected onto the second surface.

[0012] Optionally, the laser induced sintering device further comprises a light-transmitting plate, which is disposed between the laser module and the probe row and is used to contact the second surface to press and fix the photovoltaic cell.

[0013] Optionally, a first hollow structure is provided in the light-transmitting plate.

[0014] Optionally, a vacuum adsorption structure is further provided in the operating surface, and the vacuum adsorption structure is used to contact the first surface of the photovoltaic cell to adsorb and fix the photovoltaic cell.

[0015] Optionally, the laser induced sintering device further comprises a power supply, which is electrically connected to the probe row and is used to supply power to the probe row.

[0016] In a second aspect, an embodiment of the present application provides a photovoltaic cell processing device, comprising: a base, a carrier plate, and a laser induced sintering device as described in any one of the above items;

[0017] The laser induced sintering device is arranged on the base, the carrier is rotatably connected to the base, a carrying part is arranged in the carrier, and the carrier can rotate relative to the base so that the carrying part carries the photovoltaic cell through the laser induced sintering device.

[0018] Optionally, a receiving groove for receiving a photovoltaic cell is provided in the loading portion, and a second hollow structure is provided at the bottom of the receiving groove at a position corresponding to the electrode.

[0019] Optionally, a plurality of the material carrying portions are provided in the carrier plate, and the plurality of material carrying portions are spaced apart around a circumferential edge of the carrier plate.

[0020] Optionally, the photovoltaic cell processing equipment further comprises: a cell detection device, which is disposed on the base and located at a downstream station of the laser induced sintering device, and the loading portion is also used to carry the photovoltaic cell through the cell detection device.

[0021] Optionally, a lifting mechanism is further provided in the base, and the laser induced sintering device and / or the battery cell detection device are installed on the lifting mechanism, and the lifting mechanism is used to adjust the position of the laser induced sintering device and / or the battery cell detection device.

[0022] Optionally, the cell detection device includes at least one of an electroluminescence detection device, a current-voltage characteristic detection device and a hot plate detection device.

[0023] In an embodiment of the present application, a probe row is arranged on the operating surface of the bottom plate so that the photovoltaic cell is placed on the operating surface, the probe row is in contact with the first surface of the photovoltaic cell, and then the probe row is used to supply power to the photovoltaic cell. At the same time, a laser module is arranged above the probe row, and the laser module can be used to emit a laser beam to the second surface of the photovoltaic cell to achieve laser induced sintering processing operation on the photovoltaic cell. By arranging the laser module and the probe row on both sides of the photovoltaic cell, the shielding of the laser beam emitted by the laser module by the probe row can be reduced, and the induced sintering process effect on the battery sheet can be improved, thereby helping to improve the conversion efficiency of the photovoltaic cell.

[0024] Additional aspects and advantages of the present application will be given in part in the description below, and in part will become apparent from the description below, or will be learned through the practice of the present application. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] The above and / or additional aspects and advantages of the present application will become apparent and easily understood from the description of the embodiments in conjunction with the following drawings, in which:

[0026] Figure 1 is a schematic diagram of a laser induced sintering device according to an embodiment of the present application;

[0027] Figure 2 is a schematic diagram of a photovoltaic cell according to an embodiment of the present application;

[0028] Figure 3 is a schematic diagram of a light-transmitting plate according to an embodiment of the present application;

[0029] Figure 4 It is a photovoltaic cell processing device according to an embodiment of the present application;

[0030] Figure 5 It is a partial schematic diagram of a photovoltaic cell processing device according to an embodiment of the present application.

[0031] Reference numerals:

[0032] 100: laser induced sintering device; 110: bottom plate; 120: probe row; 130: laser module; 1301: laser emitter; 1302: laser galvanometer; 1303: focusing field lens; 140: light-transmitting plate; 140a: first hollow structure; 200: photovoltaic cell; 200a: first surface; 200b: second surface; 210: electrode; 300: base; 310: carrier plate; 311: loading part; 311a: accommodating groove; 311b: second hollow structure; 400: lifting mechanism; 500: cell detection device. DETAILED DESCRIPTION

[0033] The embodiments of the present application will be described in detail below, and examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present application, and should not be construed as limitations on the present application. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in the field without making creative work are within the scope of protection of the present application.

[0034] The term "first" or "second" in the specification and claims of this application may include one or more of the features explicitly or implicitly. In the description of this application, unless otherwise specified, "plurality" means two or more. In addition, "and / or" in the specification and claims means at least one of the connected objects, and the character " / " generally means that the objects connected before and after are in an "or" relationship.

[0035] In the description of the present application, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present application.

[0036] In the description of this application, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be 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 it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0037] The laser induced sintering device and photovoltaic cell processing equipment provided in the embodiments of the present application are described in detail below through specific embodiments and their application scenarios in conjunction with the accompanying drawings.

[0038] like Figure 1 and Figure 2As shown, according to some embodiments of the present application, the laser induced sintering device 100 includes: a base plate 110, a probe row 120 and a laser module 130; an operating surface is provided on the base plate 110 for placing a photovoltaic cell 200, the photovoltaic cell 200 has a first surface 200a and a second surface 200b relative to each other, and an electrode 210 is provided in the first surface 200a; the probe row 120 is provided in the operating surface, and the probe row 120 is in contact with the electrode 210 on the first surface 200a to supply power to the photovoltaic cell 200; the laser module 130 is provided on the side of the probe row 120 away from the operating surface, and is used to emit a laser beam to the second surface 200b of the photovoltaic cell 200.

[0039] In the embodiment of the present application, a probe row 120 is arranged in the operating surface of the bottom plate 110 so that the photovoltaic cell 200 is placed on the operating surface, so that the probe row 120 contacts the first surface 200a of the photovoltaic cell 200, and then the probe row 120 is used to supply power to the photovoltaic cell 200. At the same time, a laser module 130 is arranged above the probe row 120, and the laser module 130 can be used to emit a laser beam to the second surface 200b of the photovoltaic cell 200, thereby realizing the laser induced sintering operation of the photovoltaic cell 200. In the laser induced sintering device 100 of the present application, by arranging the laser module 130 and the probe row 120 on both sides of the photovoltaic cell 200, the shielding of the laser beam emitted by the laser module 130 by the probe row 120 can be reduced, and the induced sintering process effect on the cell sheet can be improved, thereby helping to improve the conversion efficiency of the photovoltaic cell 200.

[0040] Exemplarily, the laser induced sintering device 100 of the embodiment of the present application can be used for the processing and manufacturing of back-contact solar cells, such as interdigitated back contact (IBC) cells, heterojunction back contact (HBC) cells, etc.

[0041] It is understandable that the photovoltaic cell 200 generally has a light-receiving surface and a backlight surface that are arranged relatively, the light-receiving surface is used to receive light, the backlight surface of the photovoltaic cell 200 is set as the first surface 200a, and the light-receiving surface is set as the second surface 200b. When the photovoltaic cell 200 is a back-contact solar cell, the electrodes 210 of the photovoltaic cell 200 are all arranged on the backlight surface (that is, the first surface 200a) of the back-contact solar cell, and the electrodes 210 include a positive electrode and a negative electrode. Among them, the electrode 210 arranged on the first surface 200a of the photovoltaic cell 200 can be a strip metal grid line, or it can be a pad or a solder point distributed along a straight line.

[0042] Furthermore, when the laser induced sintering device 100 is used to process the back-contact solar cell, the laser module 130 is used to emit a laser beam to the light-receiving surface (i.e., the second surface 200b) of the back-contact solar cell to excite the photovoltaic cell 200 to generate carriers. At the same time, the probe row 120 is used to contact the electrode 210 in the back-light surface (i.e., the first surface 200a) of the back-contact solar cell to provide an external electric field to the photovoltaic cell 200, thereby forming a directional current in the photovoltaic cell 200. When the current passes through the metal and silicon interface, a thermal effect is generated due to the large contact resistance between the metal and silicon. The generated heat can further promote the mutual diffusion of the metal and silicon, so that the photovoltaic cell 200 obtains excellent contact characteristics after sintering.

[0043] When using the laser induced sintering device 100 of the present application, the probe row 120 and the electrode 120 are both located on the backlight side of the photovoltaic cell 200. The laser beam irradiates the light-receiving side of the photovoltaic cell 200, which can simultaneously eliminate the shielding of the laser beam by the probe row 120 and the electrode 210. Even if a relatively low-power laser beam is used, the photovoltaic cell 200 can generate a relatively large current, thereby improving the process effect of the induced sintering. At the same time, it can avoid damage to the battery caused by high power.

[0044] In addition, the structure of the probe row 120 can be adapted to the structure of the electrode 120 in the backlight surface of the photovoltaic cell 200, so that the probe row 120 can contact all electrodes in the photovoltaic cell 200, thereby setting a lower reverse voltage and effectively avoiding the battery breakdown problem.

[0045] Of course, the laser induced sintering device 100 of the embodiment of the present application can also be applied to the processing technology of other types of photovoltaic cells 200 to improve the contact characteristics between the surface electrode 210 of the cell and the silicon substrate. Those skilled in the art can flexibly set it according to actual needs, and the embodiment of the present application does not limit this.

[0046] Specifically, a plurality of probe rows 120 may be provided on the bottom plate 110, and a plurality of probes are provided in each probe row 120, and the probes are in contact with the electrodes 210 on the surface of the photovoltaic cell 200 to provide current or voltage to the electrodes 210. A plurality of probe holes may be provided in the operating surface of the bottom plate 110, and each probe hole corresponds to a probe, and then a plurality of probes are respectively inserted into the corresponding probe holes.

[0047] In a specific application, the probe row 120 can move relative to the base plate 110 so that when the photovoltaic cell 200 is placed on the operating surface, the probe row 120 is controlled to move toward the photovoltaic cell 200 as a whole, so that the probes on the probe row 120 contact the electrodes 210 on the first surface 200a of the photovoltaic cell 200.

[0048] Of course, the probe row 120 can also be installed and fixed on the bottom plate 110. When the photovoltaic cell 200 is placed on the operating surface, the probes in the probe row 120 directly contact the electrodes 210 on the first surface 200a of the photovoltaic cell 200. The specific installation structure of the probe row 120 and the bottom plate 110 can be flexibly set according to actual needs, and the embodiments of the present application do not limit this.

[0049] Alternatively, if Figure 1 As shown, the laser module 130 includes: a laser emitter 1301, a laser galvanometer 1302 and a focusing field lens 1303; the laser emitter 1301 is arranged on the side of the probe row 120 away from the operation surface, the laser galvanometer 1302 is arranged opposite to the laser emitter 1301, and the focusing field lens 1303 is arranged on the side of the laser galvanometer 1302 close to the photovoltaic cell 200; the laser emitter 1301 is used to emit a laser beam, and the laser beam passes through the laser galvanometer 1302 and the focusing field lens 1303 in sequence and then is projected onto the second surface 200b of the photovoltaic cell 200.

[0050] In the embodiment of the present application, a laser beam is emitted by a laser emitter 1301, and the laser beam passes through a laser galvanometer 1302 and a focusing field lens 1303 in sequence. The laser galvanometer 1302 can be used to adjust the position of the laser beam projected onto the photovoltaic cell 200 and the moving speed of the laser beam. The focusing field lens 1303 can be used to focus the laser beam, and then a laser spot of a preset shape can be formed on the second surface 200b of the photovoltaic cell 200, thereby achieving precise scanning of the second surface 200b of the photovoltaic cell 200.

[0051] In some embodiments, the laser wavelength emitted by the laser emitter 1301 is 650nm-1400nm, wherein the laser spot projected by the laser beam on the second surface 200b of the photovoltaic cell 200 may be a linear spot, a rectangular spot, a square spot, a circular spot, an elliptical spot, etc. In practical applications, the laser wavelength emitted by the laser module 130 and the shape and structure of the projected laser spot can be flexibly set according to actual needs, and this application does not limit this.

[0052] Alternatively, if Figure 1 As shown, the laser induced sintering device 100 further includes a light-transmitting plate 140 , which is disposed between the laser module 130 and the probe row 120 and is used to contact the second surface 200 b of the photovoltaic cell 200 to press and fix the photovoltaic cell 200 .

[0053] In the embodiment of the present application, after the photovoltaic cell 200 is placed on the operating surface of the base plate 110, the photovoltaic cell 200 is pressed using the light-transmitting plate 140, which can avoid large displacement of the photovoltaic cell 200 during the sintering process. At the same time, the pressing effect of the light-transmitting plate 140 can make the electrode 210 on the first surface 200a of the photovoltaic cell 200 fully contact with the probe row 120.

[0054] The light-transmitting plate 140 may be made of a transparent material, so that the laser beam emitted by the laser module 130 can pass through the light-transmitting plate 140 and irradiate the second surface 200 b of the photovoltaic cell 200 .

[0055] Exemplarily, the light-transmitting plate 140 may be a quartz light-transmitting plate, an organic glass plate, an inorganic glass plate, etc. Of course, the light-transmitting plate 140 made of other transparent materials may also be selected. It can be flexibly selected according to actual needs, and the embodiments of the present application do not limit this.

[0056] Alternatively, if Figure 3 As shown, a first hollow structure 140a is provided in the light-transmitting plate 140. In the embodiment of the present application, by providing the first hollow structure 140a in the light-transmitting plate 140, the laser beam emitted by the laser module 130 passes through the first hollow structure 140a and directly irradiates the corresponding position on the second surface 200b of the photovoltaic cell 200, so that the pressing effect of the light-transmitting plate 140 on the photovoltaic cell 200 can be ensured, and the influence of the light-transmitting plate 140 on the laser beam can be reduced.

[0057] It can be understood that, during the laser induced sintering process, the laser beam is mainly used to irradiate the position on the photovoltaic cell 200 corresponding to the electrode 210. For this purpose, a first hollow structure 140a can be provided in the light-transmitting plate 140, so that the first hollow structure 140a corresponds to the position of the electrode 210 in the photovoltaic cell 200. Specifically, along the direction perpendicular to the second surface 200b, the projection of the first hollow structure 140a covers the projection of the electrode 210 on the first surface 200a.

[0058] Among them, the first hollow structure 140a is a hole structure that penetrates the light-transmitting plate 140. The specific shape of the hole structure can be flexibly set according to actual needs, and the embodiment of the present application does not limit this.

[0059] Optionally, a vacuum adsorption structure (not shown in the figure) is further provided in the operating surface of the bottom plate 110 , and the vacuum adsorption structure is used to contact with the first surface 200 a of the photovoltaic cell 200 to adsorb and fix the photovoltaic cell 200 .

[0060] In the embodiment of the present application, a vacuum adsorption structure is provided in the operating surface of the base plate 110 so that when the photovoltaic cell 200 is placed on the operating surface, the vacuum adsorption structure can be used to adsorb and fix the photovoltaic cell 200, thereby avoiding large movement of the photovoltaic cell 200 during the sintering process.

[0061] Specifically, the vacuum adsorption structure can be a number of adsorption plates arranged in the operating surface, and the adsorption plates are staggered with the probe row 120. When the photovoltaic cell 200 is placed on the operating surface, the adsorption plates are in contact with the first surface 200a of the photovoltaic cell 200, and the deformation of the adsorption plates is used to form negative pressure adsorption to fix the photovoltaic cell 200.

[0062] In other embodiments, the vacuum adsorption structure can be a plurality of adsorption holes arranged in the operating surface, and the plurality of adsorption holes are connected to an external vacuum pumping mechanism. The vacuum pumping mechanism can provide negative pressure to the plurality of adsorption holes to utilize the plurality of adsorption holes to adsorb and fix the photovoltaic cell 200.

[0063] Optionally, the laser induced sintering device 100 further includes a power supply (not shown in the figure), which is electrically connected to the probe row 120 for supplying power to the probe row 120 .

[0064] In an embodiment of the present application, a power source is electrically connected to the probe row 120 to provide a reverse voltage to the photovoltaic cell 200 through the probe row 120, so that the carriers generated by laser excitation in the photovoltaic cell 200 form a directional current, so as to utilize the thermal effect generated when the current passes through the metal-silicon interface. The generated heat can further promote the mutual diffusion of metal and silicon, thereby achieving sintering.

[0065] Alternatively, if Figure 4 As shown, a photovoltaic cell processing equipment is also provided in an embodiment of the present application, including: a base 300, a carrier plate 310 and the laser induced sintering device 100 in the above embodiment; the laser induced sintering device 100 is arranged on the base 300, the carrier plate 310 is rotatably connected to the base 300, and a loading portion 311 is provided in the carrier plate 310, and the carrier plate 310 can be rotated relative to the base 300 so that the loading portion 311 carries the photovoltaic cell 200 through the laser induced sintering device 100.

[0066] In the embodiment of the present application, by arranging the laser induced sintering device 100 on the base 300, the carrier 310 is rotatably connected to the base 300, and the carrier 310 is rotated to make the material carrying part 311 carry the photovoltaic cell 200 and move to the corresponding position of the operating surface on the bottom plate 110, so that the probe row 120 is in contact with the first surface 200a of the photovoltaic cell 200, and the probe row 120 is used to supply power to the photovoltaic cell 200, and the laser module 130 arranged above the probe row 120 is used to emit a laser beam to the second surface 200b of the photovoltaic cell 200, so as to realize the laser induced sintering processing operation of the photovoltaic cell 200. By arranging the laser module 130 and the probe row 120 on both sides of the photovoltaic cell 200, the shielding of the laser beam emitted by the laser module 130 by the probe row 120 can be reduced, and the induced sintering process effect on the battery sheet can be improved, thereby helping to improve the conversion efficiency of the photovoltaic cell 200.

[0067] Alternatively, if Figure 4 As shown, a receiving groove 311a for receiving the photovoltaic cell 200 is provided in the loading portion 311 , an electrode 210 is provided on the first surface 200a of the photovoltaic cell 200 , and a second hollow structure 311b is provided at the bottom of the receiving groove 311a at a position corresponding to the electrode 210 .

[0068] In the embodiment of the present application, a receiving groove 311a is provided in the loading portion 311 so that the photovoltaic cell 200 can be accommodated by the receiving groove 311a and the photovoltaic cell 200 can be limited and fixed. At the same time, a second hollow structure 311b is provided at the bottom of the receiving groove 311a. The second hollow structure 311b corresponds to the position of the electrode 210 on the first surface 200a of the photovoltaic cell 200, so that the probe row 120 can pass through the second hollow structure 311b and contact the electrode 210.

[0069] Alternatively, if Figure 4 As shown, a plurality of material carrying portions 311 are provided in the carrier 310, and the plurality of material carrying portions 311 are arranged at intervals around the circumferential edge of the carrier 310. In the embodiment of the present application, by arranging a plurality of material carrying portions 311 on the circumferential edge of the carrier 310, the carrier 310 can be used to simultaneously carry and move a plurality of photovoltaic cells 200, thereby improving processing efficiency.

[0070] Alternatively, if Figure 4 As shown, a lifting mechanism 400 is further provided in the base 300 , and the bottom plate 110 is mounted on the lifting mechanism 400 . The lifting mechanism 400 is used to drive the bottom plate 110 to move up and down to adjust the position of the probe row 120 .

[0071] In an embodiment of the present application, a lifting mechanism 400 is provided in the base 300, and the bottom plate 110 is installed on the lifting mechanism 400, and the lifting mechanism 400 can be used to adjust the position of the bottom plate 110, so that when the loading portion 311 carrying the photovoltaic cell 200 moves above the bottom plate 110, the lifting mechanism 400 can drive the bottom plate 110 to move toward the loading portion 311, so that the probe row 120 contacts the electrode 210 on the first surface 200a of the photovoltaic cell 200.

[0072] At the same time, after the sintering operation is completed, the lifting mechanism 400 drives the bottom plate 110 to move away from the loading portion 311, so that the probe row 120 is away from the photovoltaic cell 200, and then the carrier 310 can be rotated to make the loading portion 311 carry the photovoltaic cell 200 away from the laser induced sintering device 100. The lifting mechanism 400 is provided to facilitate flexible adjustment of the position of the bottom plate 110, thereby avoiding interference between the bottom plate 110 and the probe row 120 and the carrier 310.

[0073] Specifically, a lifting mechanism 400 may be installed on the base 300, and the bottom plate 110 may be installed on the lifting mechanism 400, and the lifting mechanism 400 may drive the bottom plate 110 to move up and down. The lifting mechanism 400 may be a motor-driven lifting mechanism, a cylinder-driven lifting mechanism, or a hydraulic-driven lifting mechanism, or may be a lifting mechanism of other structures, and those skilled in the art may flexibly set it according to actual needs, and the embodiments of the present application do not limit this.

[0074] Alternatively, if Figure 4 and Figure 5 As shown, the photovoltaic cell 200 processing equipment also includes: a cell detection device 500, which is arranged on the base 300 and is located at the lower workstation of the laser induced sintering device 100, and the loading part 311 is also used to carry the photovoltaic cell 200 through the cell detection device 500.

[0075] In the embodiment of the present application, the cell detection device 500 is arranged on the base 300, and the cell detection device 500 is arranged at the lower station of the laser induced sintering device 100, so that the photovoltaic cell 200 is carried by the loading part 311 to pass through the laser induced sintering device 100 first, so as to complete the laser induced sintering process of the photovoltaic cell 200, and then the cell detection device 500 is used to detect the performance of the photovoltaic cell 200. Furthermore, the processing device and the detection device of the photovoltaic cell 200 can be integrated into the same device, which helps to improve the processing efficiency, and at the same time, it can also save the space occupied by the equipment.

[0076] It is understandable that, using the laser induced sintering device 100 of the embodiment of the present application, the laser module 130 and the probe row 120 are arranged on both sides of the photovoltaic cell 200, and the first surface 200a of the photovoltaic cell 200 provided with the electrode 210 is placed downward in the loading part 311 of the carrier 310, and the placement position of the photovoltaic cell 200 just meets the testing requirements of the cell detection device 500. In this way, after the photovoltaic cell 200 is carried by the loading part 311 to complete the laser induced sintering process operation, the performance test of the photovoltaic cell 200 can be directly carried out, which greatly improves the processing and detection efficiency.

[0077] In some embodiments, a lifting mechanism 400 may be provided on the base 300 at a position corresponding to the laser induced sintering device 100, and the laser induced sintering device 100 may be installed on the lifting mechanism 400. The lifting mechanism 400 may drive at least part of the laser induced sintering device 100 to move, so as to flexibly adapt to the testing requirements of the photovoltaic cell 200.

[0078] Optionally, the cell detection device 500 includes at least one of an electroluminescence detection device, a current-voltage characteristic detection device, and a hot spot detection device.

[0079] In an embodiment of the present application, by installing at least one of an electroluminescent detection device, a current-voltage characteristic detection device, and a hot spot detection device on the base 300, the performance of the photovoltaic cell 200 can be further detected after the laser induced sintering process of the photovoltaic cell 200 is completed, thereby realizing the integration of the processing equipment and the detection equipment of the photovoltaic cell 200, which helps to improve the processing efficiency and improve the quality control of the photovoltaic cell 200.

[0080] Among them, the electroluminescence (EL) detection device uses the electroluminescence principle of crystalline silicon and cooperates with a high-resolution infrared camera to capture near-infrared images of crystalline silicon. The acquired imaging images are analyzed and processed by image software to detect quality defects such as hidden cracks, fragments, cold solder joints, and broken grids in the photovoltaic cell 200.

[0081] The current-voltage (IV) characteristic detection device is used to measure the current-voltage characteristic curve of the photovoltaic cell 200 under different light and temperature conditions to evaluate the conversion efficiency, power output and other performance of the photovoltaic cell 200.

[0082] The hot spot detection device mainly uses thermal imaging technology to detect the thermal radiation on the surface of the photovoltaic cell 200 , and then analyzes and determines the quality of the photovoltaic cell 200 .

[0083] Of course, other types of cell detection devices 500 may also be integrated on the base 300 to improve the quality control of the photovoltaic cell 200. The specific selection of the cell detection device 500 may be flexibly set according to actual needs, and the embodiments of the present application do not limit this.

[0084] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "illustrative embodiments", "examples", "specific examples", or "some examples" means that the specific features, structures, materials, or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present application. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described may be combined in any one or more embodiments or examples in a suitable manner.

[0085] Although the embodiments of the present application have been shown and described, those skilled in the art will appreciate that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present application, and that the scope of the present application is defined by the claims and their equivalents.

Claims

1. A laser induced sintering device, characterized in that: include: A bottom plate, wherein an operating surface is provided on the bottom plate for placing a photovoltaic cell, wherein the photovoltaic cell has a first surface and a second surface opposite to each other, and an electrode is provided in the first surface; A probe row, the probe row being arranged in the operating surface and being used for contacting with the electrodes in the first surface to supply power to the photovoltaic cell; A laser module is arranged on a side of the probe row away from the operating surface and is used for emitting a laser beam toward the second surface.

2. The laser induced sintering device according to claim 1, characterized in that: The laser module comprises: a laser emitter, a laser galvanometer and a focusing field lens; The laser emitter is arranged on the side of the probe row away from the operating surface, the laser galvanometer is arranged opposite to the laser emitter, and the focusing field lens is arranged on the side of the laser galvanometer close to the photovoltaic cell; the laser emitter is used to emit a laser beam, and the laser beam passes through the laser galvanometer and the focusing field lens in sequence and then is projected onto the second surface.

3. The laser induced sintering device according to claim 1, characterized in that: The laser induced sintering device further includes a light-transmitting plate, which is disposed between the laser module and the probe row and is used to contact the second surface to press and fix the photovoltaic cell.

4. The laser induced sintering device according to claim 3, characterized in that: The light-transmitting plate is provided with a first hollow structure.

5. The laser induced sintering device according to claim 1, characterized in that: The operating surface is also provided with a vacuum adsorption structure, and the vacuum adsorption structure is used to contact with the first surface to adsorb and fix the photovoltaic cell.

6. The laser induced sintering device according to claim 1, characterized in that: The laser induced sintering device further includes a power supply, which is electrically connected to the probe row and is used to supply power to the probe row.

7. A photovoltaic cell processing device, characterized in that: include: A base, a carrier plate and a laser induced sintering device as claimed in any one of claims 1 to 6; The laser induced sintering device is arranged on the base, the carrier is rotatably connected to the base, a carrying part is arranged in the carrier, and the carrier can rotate relative to the base so that the carrying part carries the photovoltaic cell through the laser induced sintering device.

8. The photovoltaic cell processing equipment according to claim 7, characterized in that: The loading portion is provided with a receiving groove for receiving the photovoltaic cell, and the bottom of the receiving groove is provided with a second hollow structure at a position corresponding to the electrode.

9. The photovoltaic cell processing equipment according to claim 8, characterized in that: A plurality of the material carrying portions are arranged in the carrier plate, and the plurality of the material carrying portions are arranged at intervals around the circumferential edge of the carrier plate.

10. The photovoltaic cell processing equipment according to claim 7, characterized in that: The photovoltaic cell processing equipment further includes: a cell detection device, which is disposed on the base and located at a downstream station of the laser induced sintering device, and the loading portion is also used to carry the photovoltaic cell through the cell detection device.

11. The photovoltaic cell processing equipment according to claim 10, characterized in that: The base is also provided with a lifting mechanism, the laser induced sintering device and / or the battery cell detection device is installed on the lifting mechanism, and the lifting mechanism is used to adjust the position of the laser induced sintering device and / or the battery cell detection device.

12. The photovoltaic cell processing equipment according to claim 11, characterized in that: The cell detection device includes at least one of an electroluminescence detection device, a current-voltage characteristic detection device and a hot plate detection device.

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