Electric input device and laser-induced sintering system

Abstract

The utility model discloses an electric input device and a laser-induced sintering system. The electric input device comprises a circuit board and an electrode, the circuit board comprises an insulating substrate and a conducting layer arranged on the insulating substrate, and the conducting layer comprises a plurality of positive electrode conducting areas and a plurality of negative electrode conducting areas which are arranged in a staggered mode; the electrode comprises a plurality of positive electrode contacts arranged in the positive electrode conductive areas and a plurality of negative electrode contacts arranged in the negative electrode conductive areas, each positive electrode conductive area is provided with at least one positive electrode contact, each negative electrode conductive area is provided with at least one negative electrode contact, the positive electrode contacts are used for being in electric contact with the N area of the battery piece, and the negative electrode contacts are used for being in electric contact with the N area of the battery piece. The negative electrode contact is used for being electrically contacted with a battery piece P region; the positive electrode conductive area is used for communicating all the positive electrode contacts with the positive electrode of an external power supply, and the negative electrode conductive area is used for communicating all the negative electrode contacts with the negative electrode of the external power supply. The electric input device can be stably and effectively used for the laser-induced sintering process, and is simple in structure, low in requirements for the number and arrangement of the contacts and convenient to overhaul and maintain.

Description

Technical Field

[0001] This application relates to the field of back-contact batteries, and particularly to an electrical input device and a laser-induced sintering system. Background Art

[0002] A BC battery (Back-Contact Battery) is a battery in which both the PN junction and the metal contact surface are disposed on the back of the solar cell, which can utilize more incident light and reduce optical losses. Due to its high conversion efficiency, long service life, beautiful appearance, and mature production process, the BC battery has gradually become the market mainstream.

[0003] Refer to Figure 1 , Figure 1 which is a partial schematic diagram of the back grid lines and Pad points of the existing MBB (Multi-Busbar) BC battery cell. There are no metallized grid lines on the front of the cell of the conventional MBB BC battery. Its metallized grid lines are arranged on the back of the cell, and its P-type region and N-type region are staggered. Its back grid lines include fine grids and main grids. The P-region fine grids converge to the P-region main grid, the N-region fine grids converge to the N-region main grid, the P-region main grid and the N-region main grid are staggered, and Pad points are provided on the main grids.

[0004] Refer to Figure 2 , Figure 2 which is the probe structure of the existing MBB BC battery. When performing the LIF (Laser Induced Firing) process on the MBB BC battery described as in Figure 1 , the positive probe of this probe structure presses on the N-region Pad point, and the negative probe presses on the P-region Pad point to achieve the alignment and pressing of the probe and the Pad point. The LIF process can be carried out by applying an inverse bias voltage in combination with laser technology.

[0005] Refer to Figure 3, 0BB (0-Busbar, without main busbar) local schematic diagram of the back fine grid of a BC cell. Different from the MBB BC cell, the 0BB BC cell has no main grid structure on its back. Its P-region fine grids and N-region fine grids are staggered, and the distance between adjacent fine grid structures is relatively close and the number is relatively large. Usually, the distance between these fine grid structures is less than 1 mm, and the number is more than 100. When using the probe pressing method with a conventional probe structure, since the cell has no main grid structure, at least one probe needs to be arranged for each fine grid to ensure the conduction of each fine grid. Therefore, a huge number of probes are required. At the same time, because the distance between these fine grid structures is close, and the size of the conventional probe mounting part is usually larger than the distance between these fine grid structures, it is easy to cause short circuit between the positive and negative electrodes. In addition, when using the probe pressing method, when a single probe has a problem, it will also affect other probes, and the probes need to be replaced in time. The replacement process also needs to consider the spacing, quantity and influence between the probes, and multiple probes need to be wire-soldered in series, which is extremely complicated in operation, high in cost and not easy to maintain, with poor effectiveness and reliability. Utility Model Content

[0006] This application mainly provides an electrical input device and a laser-induced sintering system, aiming to solve the technical problem that it is difficult to process BC cells, especially 0BB BC cells, with the traditional probe pressing method.

[0007] To solve the above technical problem, a technical solution adopted in this application is: to propose an electrical input device, the electrical input device is at least used to apply a voltage to a cell, and the electrical input device includes: a circuit board, the circuit board includes an insulating substrate and a conductive layer provided on the insulating substrate, the conductive layer includes a plurality of positive electrode conductive regions and a plurality of negative electrode conductive regions arranged in a staggered manner; electrodes, the electrodes include a plurality of positive electrode contacts provided in the positive electrode conductive regions, and a plurality of negative electrode contacts provided in the negative electrode conductive regions, and at least one of the positive electrode contacts is provided in each of the positive electrode conductive regions, and at least one of the negative electrode contacts is provided in each of the negative electrode conductive regions, the positive electrode contacts are used for electrical contact with the N region of the cell, and the negative electrode contacts are used for electrical contact with the P region of the cell; the positive electrode conductive regions are used to connect all the positive electrode contacts to the positive electrode of an external power source, and the negative electrode conductive regions are used to connect all the negative electrode contacts to the negative electrode of the external power source;

[0008] The electrodes are arranged on the same side of the circuit board; wherein, the conductive layer is only provided on the first surface or the second surface of the insulating substrate, and the positive electrode conductive regions and the negative electrode conductive regions are located on the same side surface; the plurality of positive electrode conductive regions and the plurality of negative electrode conductive regions are arranged in a staggered manner with each other.

[0009] In some embodiments, when the electrical input device is used to apply a voltage to a single solar cell, all the positive conductive regions and all the negative conductive regions converge at one location respectively; or, when the electrical input device is used to apply a voltage to two solar cells, all the positive conductive regions and all the negative conductive regions converge at one or two locations respectively.

[0010] In some embodiments, each of the positive conductive regions and each of the negative conductive regions is strip-shaped; the positive conductive regions and the negative conductive regions are arranged in parallel and alternately in sequence along a first direction, and the positive conductive regions and the negative conductive regions extend along a second direction, where the second direction is perpendicular to the first direction; or, the positive conductive regions and the negative conductive regions are arranged in parallel and alternately in sequence along a third direction, and the positive conductive regions and the negative conductive regions extend along a fourth direction, where the fourth direction is perpendicular to the third direction, and along the third direction, the lengths of the positive conductive regions and the negative conductive regions in the fourth direction gradually increase and then gradually decrease.

[0011] In some embodiments, when the electrical input device is used to apply a voltage to a single solar cell, the conductive layer further includes a first guiding layer and a second guiding layer. The first guiding layer connects each of the positive conductive regions to converge all the positive conductive regions at one location, and the second guiding layer connects each of the negative conductive regions to converge all the negative conductive regions at one location.

[0012] In some embodiments, when the positive conductive regions and the negative conductive regions are arranged in parallel and alternately in sequence along a first direction and extend along a second direction, the first guiding layer and the second guiding layer are spaced apart along the second direction and located on both sides of the positive conductive regions and the negative conductive regions; or, when the positive conductive regions and the negative conductive regions are arranged in parallel and alternately in sequence along a third direction and extend along a fourth direction, the first guiding layer includes a first sub-guiding layer and a second sub-guiding layer connected perpendicularly to each other, and the second guiding layer includes a third sub-guiding layer and a fourth sub-guiding layer connected perpendicularly to each other. The first sub-guiding layer and the third sub-guiding layer are arranged in parallel and spaced apart along the second direction, and the second sub-guiding layer and the fourth sub-guiding layer are arranged in parallel and spaced apart along the first direction. The first direction is perpendicular to the second direction, and the third direction forms a certain angle with the first direction; the first sub-guiding layer and the second sub-guiding layer are respectively connected to each of the positive conductive regions closest to them, and the third sub-guiding layer and the fourth sub-guiding layer are respectively connected to each of the negative conductive regions closest to them.

[0013] In some embodiments, each of the positive electrode conductive regions and each of the negative electrode conductive regions is strip-shaped. The electrical input device is configured to apply a voltage to two battery cells. All the positive electrode conductive regions and all the negative electrode conductive regions are divided into two separately arranged conductive units along a first direction. A plurality of the positive electrode conductive regions and a plurality of the negative electrode conductive regions in each conductive unit are arranged in parallel and alternately in sequence along a second direction. The second direction is perpendicular to the first direction, and all the positive electrode conductive regions and all the negative electrode conductive regions extend along the first direction. The distance between adjacent positive electrode conductive regions and negative electrode conductive regions in the two conductive units is the same, and the positive electrode conductive regions or the negative electrode conductive regions in one of the conductive units correspond to the positive electrode conductive regions or the negative electrode conductive regions in the other conductive unit in the second direction.

[0014] In some embodiments, when all the positive electrode conductive regions and all the negative electrode conductive regions are respectively concentrated at one place, the conductive layer further includes a first guiding layer and a second guiding layer. The first guiding layer is connected to one of all the positive electrode conductive regions and all the negative electrode conductive regions, and the second guiding layer is connected to the other of all the positive electrode conductive regions and all the negative electrode conductive regions, so that all the positive electrode conductive regions are concentrated at one place and all the negative electrode conductive regions are concentrated at another place. The first guiding layer includes two first sub-guiding layers separately arranged on both sides of the two conductive units along the second direction and a second sub-guiding layer arranged on one side of the conductive unit along the second direction. The second sub-guiding layer extends along the first direction, and both of the two first sub-guiding layers are connected to the second sub-guiding layer. The second guiding layer is arranged between the two conductive units and extends along the second direction. When all the positive electrode conductive regions and all the negative electrode conductive regions are respectively concentrated at two places, the conductive layer further includes a third guiding layer and a fourth guiding layer corresponding to the conductive units. The third guiding layer and the fourth guiding layer are respectively arranged on both sides of each conductive unit along the first direction and both extend along the second direction. The third guiding layer is connected to one of all the positive electrode conductive regions and all the negative electrode conductive regions of the conductive unit, and the fourth guiding layer is connected to the other of all the positive electrode conductive regions and all the negative electrode conductive regions of the conductive unit.

[0015] To solve the above technical problems, another technical solution adopted by this application is: to provide an electrical input device, the electrical input device correspondingly contacts at least one solar cell, and the electrical input device includes: a circuit board, the circuit board includes an insulating substrate and a conductive layer disposed on the insulating substrate, the conductive layer includes a plurality of positive electrode conductive regions and a plurality of negative electrode conductive regions arranged in a staggered manner; electrodes, the electrodes include a plurality of positive electrode contacts disposed on the positive electrode conductive regions, and a plurality of negative electrode contacts disposed on the negative electrode conductive regions, and at least one of the positive electrode contacts is disposed on each of the positive electrode conductive regions, and at least one of the negative electrode contacts is disposed on each of the negative electrode conductive regions, the positive electrode contacts are used for electrical contact with the N region of the solar cell, and the negative electrode contacts are used for electrical contact with the P region of the solar cell; the positive electrode conductive regions are used to connect all the positive electrode contacts to the positive pole of an external power source, and the negative electrode conductive regions are used to connect all the negative electrode contacts to the negative pole of the external power source; the conductive layer is two layers, respectively disposed on the opposite first surface and second surface of the insulating substrate, the positive electrode conductive regions and the negative electrode conductive regions are respectively located on the first surface and the second surface, wherein, one of the positive electrode contacts and the negative electrode contacts penetrates through a through hole on the circuit board to the surface where the other is located; the projections of the positive electrode conductive regions and the negative electrode conductive regions on the same plane intersect, or at least part of the positive electrode conductive regions and the negative electrode conductive regions are closed structures.

[0016] In some embodiments, the plurality of positive electrode conductive regions are arranged in a staggered manner and connected, so that all the positive electrode conductive regions converge at least at one place, and the plurality of negative electrode conductive regions are arranged in a staggered manner and connected, so that all the negative electrode conductive regions converge at least at one place.

[0017] To solve the above technical problems, another technical solution adopted by this application is to propose an electrical input device. The electrical input device correspondingly contacts at least two battery cells. The electrical input device includes: a circuit board, which includes an insulating substrate and a conductive layer disposed on the insulating substrate. The conductive layer includes a plurality of positive electrode conductive regions and a plurality of negative electrode conductive regions arranged in a staggered manner; electrodes, which include a plurality of positive electrode contacts disposed in the positive electrode conductive regions and a plurality of negative electrode contacts disposed in the negative electrode conductive regions. And at least one of the positive electrode contacts is disposed in each of the positive electrode conductive regions, and at least one of the negative electrode contacts is disposed in each of the negative electrode conductive regions. The positive electrode contacts are used for electrical contact with the N region of the battery cell, and the negative electrode contacts are used for electrical contact with the P region of the battery cell; the positive electrode conductive regions are used to connect all the positive electrode contacts to the positive electrode of an external power source, and the negative electrode conductive regions are used to connect all the negative electrode contacts to the negative electrode of the external power source; the electrodes are arranged on different sides of the circuit board, wherein the conductive layer is two layers, which are respectively disposed on the opposite first surface and second surface of the insulating substrate, and the conductive patterns formed by the electrodes on the first surface and the second surface are the same or different.

[0018] In some embodiments, the width range of the positive electrode conductive regions and the negative electrode conductive regions is 300μm - 600μm.

[0019] In some embodiments, the width of the positive electrode contacts is less than the width of the positive electrode conductive regions, the width of the negative electrode contacts is less than the width of the negative electrode conductive regions, and the width range of the positive electrode contacts and the negative electrode contacts is 10μm - 500μm.

[0020] In some embodiments, the number of both the positive electrode conductive regions and the negative electrode conductive regions is 160 - 250, the number of the positive electrode contacts on each positive electrode conductive region is 1 - 100, and the number of the negative electrode contacts on each negative electrode conductive region is 1 - 100.

[0021] In some embodiments, the positive electrode contacts and the negative electrode contacts are dot-shaped or linear.

[0022] In some embodiments, the positive electrode contacts and the negative electrode contacts are elastic contacts.

[0023] In some embodiments, the elastic contacts include elastic sheets. One end of the elastic sheet is fixed on the conductive layer, and a rebound gap is formed between the elastic sheet and the conductive layer.

[0024] In some embodiments, the electrical input device further includes at least insulating glue filled between the positive electrode conductive regions and the negative electrode conductive regions.

[0025] To solve the above technical problems, another technical solution adopted by this application is: to provide a laser-induced sintering system, which includes the above-mentioned electrical input device and a laser processing device located above the electrical input device.

[0026] The beneficial effects of this application are as follows: Different from the prior art, this application discloses an electrical input device and a laser-induced sintering system. The electrical input device forms a conductive layer on a circuit board and sets electrode contacts on the conductive area of the conductive layer. When pressed against a battery cell, the contacts come into contact with the corresponding grid lines of the battery cell to form an energized circuit, thereby enabling processing of the battery cell. It is applicable to back-contact batteries, especially 0BB BC batteries. At the same time, the electrode structure of this electrical input device is simple, with low requirements for the number and arrangement of contacts. Its structure is compact and each contact is relatively independently set, facilitating inspection and maintenance. When a contact fails, other contacts can still be stably and effectively used in the laser-induced sintering process, effectively improving the utilization rate of this electrical input device and reducing the costs in aspects such as the design, application, and maintenance of this electrical input device. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the following drawings are only some embodiments of this application. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings, where:

[0028] Figure 1 is a partial schematic diagram of the back grid lines and Pad points of a battery cell of an existing MBB BC battery;

[0029] Figure 2 is the probe structure of an existing MBB BC battery;

[0030] Figure 3 is a schematic structural diagram of the grid line pattern of a battery cell of an existing 0BB BC battery;

[0031] Figure 4 is a schematic structural diagram of an embodiment of the electrical input device provided by this application;

[0032] Figure 5 is a schematic structural diagram of another embodiment of the electrical input device provided by this application;

[0033] Figure 6 is a schematic structural diagram of yet another embodiment of the electrical input device provided by this application;

[0034] Figure 7 is Figures 4 to 6Schematic diagram of the structure of an embodiment where the contact in the embodiment is an elastic contact;

[0035] Figure 8 Schematic diagram of the structure of the grid line pattern of a cell with fine grids arranged in parallel and staggered;

[0036] Figure 9 Schematic diagram of the structure of the grid line pattern of another cell with fine grids arranged in parallel and staggered;

[0037] Figure 10 It is related to Figure 8 Schematic diagram of the structure of an embodiment of the conductive layer and the electrode in the electrical input device corresponding to the embodiment;

[0038] Figure 11 It is related to Figure 9 Schematic diagram of the structure of an embodiment of the conductive layer and the electrode in the electrical input device corresponding to the embodiment;

[0039] Figure 12 Schematic diagram of the structure of the grid line pattern of a cell with closed fine grids;

[0040] Figure 13 It is related to Figure 12 Schematic diagram of the structure of an embodiment of the conductive layer and the electrode in the electrical input device corresponding to the embodiment;

[0041] Figure 14 Schematic diagram of the structure of another embodiment of the electrical input device provided by the present application

[0042] Figure 15 Schematic diagram of the structure of another embodiment of the electrical input device provided by the present application;

[0043] Figure 16 Schematic diagram of the structure of an embodiment of the laser induced sintering system provided by the present application. Detailed implementation manners

[0044] Next, the technical solutions in the embodiments of the present application will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments in the present application without creative efforts shall fall within the protection scope of the present application.

[0045] Refer to Figures 4 to 6 Any embodiment. To solve the problems existing in the prior art, the present application provides an electrical input device 100, which is at least used to apply a voltage to a cell.

[0046] The electric input device 100 includes a circuit board 200 and an electrode 300. The circuit board 200 includes an insulating substrate 210 and a conductive layer 220 disposed on the insulating substrate 210. The conductive layer 220 includes a plurality of positive conductive areas 221 and a plurality of negative conductive areas 222 disposed in a staggered manner.

[0047] The electrode 300 includes a plurality of positive contacts 310 disposed in the positive conductive region 221, and a plurality of negative contacts 320 disposed in the negative conductive region 222, and each positive conductive region 221 is provided with at least one positive contact 310, and each negative conductive region 222 is provided with at least one negative contact 320, the positive contact 310 is used to electrically contact with the N region of the battery cell, and the negative contact 320 is used to electrically contact with the P region of the battery cell; the positive conductive region 221 is used to connect all the positive contacts 310 with the positive electrode of an external power source, and the negative conductive region 222 is used to connect all the negative contacts 320 with the negative electrode of the external power source.

[0048] The electrode 300 includes a plurality of positive contacts 310 disposed in the positive conductive region 221 , which means that each positive conductive region 221 is provided with at least one positive contact 310 , and the conductive layer 20 includes a plurality of positive conductive regions 221 , thus the plurality of positive conductive regions 221 include a plurality of positive contacts 310 .

[0049] Among them, the positive conductive area 221 and the negative conductive area 222 are staggered, which means that the positive conductive area 221 and the negative conductive area 222 are arranged alternately, that is, one positive conductive area 221, one negative conductive area 222, one positive conductive area 221, one negative conductive area 222 are arranged in this order, and at the same time, the positive conductive area 221 and the negative conductive area 222 do not contact each other to avoid short circuit. For details, please refer to Figure 10 , Figure 11 , Figure 14 and Figure 15 The staggered arrangement is suitable for the common staggered arrangement of the P region and the N region in the battery cell, which facilitates the arrangement of the corresponding contacts in contact with the P region and the N region of the battery cell.

[0050] Considering that the electric input device 100 is used to apply voltage to at least one battery cell, that is, it can apply voltage to a battery cell of standard size or to two half-cell battery cells, the positive conductive area 221 and the negative conductive area 222 can be staggered as follows: Figure 10 As shown, they are arranged in parallel and staggered in one direction, or as shown Figure 14After being divided into two conductive units, they are arranged alternately in both the first direction and the second direction. Of course, after being divided into two conductive units, in addition to the positive conductive regions 221 and the negative conductive regions 222 being arranged alternately in a single conductive unit, the positive conductive regions 221 and the negative conductive regions 222 of two adjacent conductive units can also be arranged alternately.

[0051] When the electrical input device 100 is used to apply a voltage to a single solar cell, all the positive conductive regions 221 and all the negative conductive regions 222 are respectively gathered at one place to facilitate the connection of the gathering place to the positive and negative electrodes of an external power source; or, when the electrical input device 100 is used to apply a voltage to two solar cells, at this time, either one external power source or two external power sources can be selected, and all the positive conductive regions 221 and all the negative conductive regions 222 are respectively gathered at one place or two places to facilitate the connection of the gathering place to the positive and negative electrodes of one external power source or the positive and negative electrodes of two external power sources.

[0052] More specifically, the object on the solar cell contacted by the contacts can be a grid line or a PAD point. The electrical input device 100 of the present application is particularly suitable for 0BB BC solar cells. At this time, it is preferably the grid lines on the solar cell that the positive contacts 310 and the negative contacts 320 contact. In addition, the electrical input device 100 is also applicable to MBB BC solar cells. At this time, the solar cell has main grid lines, and there are PAD points on the main grid lines. At this time, it is preferably the PAD points on the solar cell that the positive contacts 310 and the negative contacts 320 contact. It should also be noted that the main grid lines and the fine grid lines are perpendicular. Since the 0BB BC solar cell has no main grid lines, all the positive contacts 310 and the negative contacts 320 contact the fine grid lines.

[0053] Among them, the positive contacts 310 arranged in the positive conductive regions 221 and the negative contacts 320 arranged in the negative conductive regions 222 mean that the positive contacts 310 are arranged on the surface of the positive conductive regions 221, and the negative contacts 320 are arranged on the surface of the negative conductive regions 222 to be in electrical contact with the P region and the N region on the back of the back-contact solar cell. The shapes, sizes and types of the positive contacts 310 and the negative contacts 320 can be designed according to the types, electrical characteristics of the actual solar cells and the graphic structures of their contact objects. For example, the contacts can be designed into dot shapes or line shapes to adapt to different requirements and different types of solar cells.

[0054] In the circuit board 200, the insulating substrate 210 can be made of materials with good insulation properties, such as ceramics, plastics, glass, etc., to ensure electrical isolation between the conductive layers 220. The insulating substrate 210 is preferably an FR-4 epoxy board, which has excellent insulation properties, heat resistance, moisture resistance, and chemical corrosion resistance, and has good machinability, which can effectively improve the reliability of the circuit board 200 and the performance of the electrical input device 100. The conductive layer 220 can be made of materials with good electrical conductivity, such as metal thin films or conductive inks, such as copper foil, aluminum foil, silver paste, and gold paste, etc., to ensure good electrical conductivity and contact performance of the electrical input device. The conductive layer 220 can be formed on the insulating substrate 210 through processes such as printing, etching, and electroplating to ensure tight bonding between the conductive layer 220 and the insulating substrate 210.

[0055] The electrical input device 100 can be used in cooperation with processing equipment to process solar cells. Before pressing the electrical input device 100 against the solar cell, as one case, precise-sized and -shaped contacts can be made through machining to ensure accurate relative positions of the contacts of the electrodes 300; during pressing, the circuit board 200 can be corrected in cooperation with vision and a three-axis alignment platform; after pressing, processing operations can be performed on the solar cell. During the processing, the positive electrode contact 310 and the negative electrode contact 320 are respectively in contact with the N-region fine grid and the P-region fine grid of the solar cell.

[0056] When using the electrical input device 100 to process solar cells, fewer electrodes are required. The design of the electrical input device 100 can avoid short-circuit problems caused by over-sized electrodes, especially for 0BB BC cells, improving the accuracy and reliability of processing. In addition, since the positive electrode contact 310 and the negative electrode contact 320 in the electrical input device 100 of this structure can achieve better matching with the objects to be contacted by the solar cell, the contact size can be made smaller, and the equipment replacement and maintenance costs caused by problems with individual contacts can also be reduced. The electrode 300 structure of the electrical input device 100 is simple, with low requirements for the number and arrangement of contacts. Its structure is compact and each contact is relatively independently arranged, facilitating inspection and maintenance. When a contact fails, other contacts can still be stably and effectively used for processing, which can effectively improve the utilization rate of the electrical input device 100 and reduce the costs in the design, application, and maintenance of the electrical input device 100, and has high stability and reliability.

[0057] Optionally, the electrical input device 100 further includes at least an insulating adhesive 330 filled between the positive conductive region 221 and the negative conductive region 222.

[0058] The insulating adhesive 330 can be made of materials with good insulation performance and thermal stability, such as silicone rubber, epoxy resin, etc. When the insulating substrate 210 also has good thermal stability in terms of material selection, the same material as the insulating substrate 210 can be selected. The insulating adhesive 330 selected in this application preferably has a temperature resistance higher than 100 °C. The insulating adhesive 330 can be filled between all the positive conductive regions 221 and the negative conductive regions 222, or can be selectively filled according to the influence of electrical properties.

[0059] By filling the insulating adhesive 330 between the positive conductive region 221 and the negative conductive region 222, the insulation performance on the circuit board 200 can be further improved, ensuring electrical isolation between the conductive regions, preventing short circuits or leakage caused by accidental contact, and thus guaranteeing the safety and stability of the processing process.

[0060] Optionally, the width range of the positive conductive region 221 and the negative conductive region 222 is 300 μm - 600 μm, such as 300 μm, 350 μm, 400 μm, 500 μm, 550 μm, 600 μm. Preferably, the width range is 400 μm - 500 μm.

[0061] Similarly, in order to ensure that when the contact touches the grid lines of the battery cell, it will not span multiple grid lines due to excessive width, resulting in short circuits or poor contact, the width of the contact can be set to be smaller than the width of the conductive region. The width of the contact can be adjusted according to actual requirements and the width of the grid lines of the battery cell to ensure good contact effects and processing accuracy. Specifically, the width of the positive contact 310 is smaller than the width of the positive conductive region 221, and the width of the negative contact 320 is smaller than the width of the negative conductive region 222. The width range of the positive contact 310 and the negative contact 320 is 10 μm - 500 μm, that is to say, the width of the contact is smaller than the width of the fine grid lines on the battery cell, such as 100 μm or more smaller. Specifically, the optional widths of the positive contact 310 and the negative contact 320 are 10 μm, 20 μm, 30 μm, 50 μm, 100 μm, 150 μm, 200 μm, 250 μm, 300 μm, 350 μm, 400 μm, 450 μm, 500 μm.

[0062] Optionally, the electrode 300 is an elastic contact. Based on the characteristics of its elastic deformation, the elastic contact can ensure good and tight contact between the contact and the grid lines of the battery cell. At the same time, the elastic contact can also provide a certain buffering effect, reducing mechanical shocks and vibrations that may occur during the processing process, thereby protecting the battery cell and the electrical input device 100 from damage.

[0063] Optionally, refer to Figure 7 , Figure 7It is a schematic structural diagram of an elastic contact provided by this application. The elastic contact includes an elastic sheet 340. One end of the elastic sheet 340 is fixed on the conductive layer 220, and a rebound gap is formed between the elastic sheet 340 and the conductive layer 220.

[0064] The elastic sheet 340 can be fixed on the conductive layer 220 by means such as stamping, welding, bonding, and fusion welding, and is electrically connected to the conductive layer 220. Figure 7 It can also be visibly seen that there is a hollowed-out part 223 in the conductive layer 220. This hollowed-out part 223 is used to indicate that the elastic sheet 340 can be formed by stamping. One end of the elastic sheet 340 is connected to the conductive layer 220, and the other end is a free end. A rebound gap is formed between the free end and the conductive layer 220. The existence of this rebound gap enables the elastic sheet 340 to undergo elastic deformation when subjected to an external force, so as to adapt to the unevenness or minor deformation of the battery cell surface. When the external force disappears, the elastic sheet 340 can rely on its own elastic restoring force to return to the original state, ensuring the close contact between the contact point and the grid line.

[0065] When the electrical input device 100 contacts the battery cell, the elastic sheet 340 will be deformed under the pressure of the battery cell surface, enabling the contact point to closely fit on the grid line. This close contact not only improves the stability of current conduction, but also can reduce the contact resistance during laser-induced sintering processing and improve the process effect.

[0066] Furthermore, the number of the positive conductive regions 221 and the negative conductive regions 222 is 160 - 250. Preferably, the number of the positive conductive regions 221 and the negative conductive regions 222 is 181, corresponding to the number of grid lines of the current conventional battery cell. The number of positive contact points 310 on each positive conductive region 221 is 1 - 100, preferably 10 - 100, such as 1, 5, 10, 20, 50, 75, etc. The number of negative contact points 320 on each negative conductive region 222 is 1 - 100, preferably 10 - 100, such as 1, 5, 10, 20, 50, 75, etc. Further preferably, the number is 25 for both. It should be noted that when applicable to MBB BC cells, the number of contact points is designed according to the number of PAD points; when applicable to 0BB BC cells, the number of contact points is designed according to how many contact points on a thin grid line result in better electrical performance.

[0067] In this electrical input device 100, since there are various grid line patterns of the battery cell, and for each grid line pattern, there can be various ways of contacting the electrode correspondingly, there are correspondingly various arrangement ways for the conductive layer 220 and the electrode 300.

[0068] Specifically, refer to Figure 4In an embodiment, the conductive layer 220 is only disposed on the first surface or the second surface of the insulating substrate 210. The positive conductive regions 221 and the negative conductive regions 222 are located on the same side surface, and the plurality of positive conductive regions 221 and the plurality of negative conductive regions 222 are arranged alternately with each other. Its structure is simple and clear, the thickness and volume of the electrical input device 100 are small, and the device is lightweight. At the same time, since the conductive regions are on the same side, it is also convenient to set the contacts and the guiding layer, reducing the complexity of manufacturing and assembling the electrical input device 100.

[0069] Or refer to Figure 5 In an embodiment, the conductive layer 220 has two layers, which are respectively disposed on the opposite first surface and second surface of the insulating substrate 210. The positive conductive regions 221 and the negative conductive regions 222 are respectively located on the first surface and the second surface. Among them, one of the positive contact 310 and the negative contact 320 penetrates through the through hole on the circuit board 200 to the surface where the other is located. This situation is applicable to certain application scenarios. In order to make the contacts correspond to the gate line pattern, it is inevitable that the positive conductive regions 221 and the negative conductive regions 222 cross or are close to each other on one surface, which easily leads to problems such as short circuits, making the electrical input device 100 lack stability and safety. By dividing the conductive layer 220 into two layers and respectively disposing them on both sides of the insulating substrate 210, the double-sided space of the insulating substrate 210 can be fully utilized, so that the positive conductive regions 221 and the negative conductive regions 222 are respectively located on the two side surfaces of the insulating substrate 210, thereby avoiding the cross interference between the two poles, improving the stability and efficiency of current transmission, reducing resistance and improving heat dissipation performance, and further enhancing the performance of the electrical input device 100.

[0070] Regardless of which conductive layer 220 setting scheme is adopted, it is necessary to ensure the effective isolation between the positive conductive regions 221 and the negative conductive regions 222 to avoid problems such as short circuits or current leakage. At the same time, factors such as the material selection, wiring design, and connection method of the conductive layer 220 also need to be considered to ensure that the electrical input device 100 has good electrical conductivity, stability, and reliability.

[0071] Figure 4 In the embodiment, the setting scheme in which the conductive layer 220 is only disposed on one side surface of the insulating substrate 210, and the positive conductive regions 221 and the negative conductive regions 222 are located on the same side surface is particularly applicable to a battery cell having a gate line pattern in which the P-region fine grids and the N-region fine grids are arranged parallel and alternately, such as a battery cell having Figure 8 and Figure 9 the two gate line patterns described.

[0072] It should be understood that Figure 8 and Figure 9A rectangular solar cell is used as an example on the image. Specifically, the solar cell can also be other common shapes on the market, as long as the arrangement of the grid lines is as Figure 8 or Figure 9 in the form of parallel and staggered arrangement. It can be understood that the solar cell with the grid line pattern of parallel and staggered arrangement of P-region fine grids and N-region fine grids is one type that the electrical input device 100 provided in this application aims to solve.

[0073] Figure 8 What is described is the grid line pattern of one type of 0BB BC solar cell, in which the N-region fine grids and P-region fine grids are parallel and staggered, and are parallel to the side lines in one direction of the solar cell, showing an equal-length arrangement. Figure 9 In the described grid line pattern, the P-region fine grids are represented by dark lines, and the N-region fine grids are represented by light lines. They are arranged in a parallel and staggered manner in two-dimensional directions.

[0074] Optionally, for solar cells with the grid line pattern structures as Figure 8 and Figure 9 described, referring to Figure 10 and Figure 11 , the design solutions of the conductive layer 220 and the contacts provided in this application are as follows: The conductive layer 220 is only provided on the first surface or the second surface of the insulating substrate 210, and multiple positive conductive regions 221 and multiple negative conductive regions 222 are arranged in a parallel and staggered manner. For solar cells with the grid line pattern structures as Figure 8 and Figure 9 described, the conductive regions of the electrical input device 100 provided in this application can also be arranged in a parallel and staggered manner so that the contacts on the conductive regions correspond to the grid line pattern structure. After arranging the conductive regions, the corresponding contacts, guiding layers, and insulating glue 330 can be arranged. In Figure 10 and Figure 11 the schematic diagrams of the embodiments, the hollow dots represent the positive contacts 310 arranged in the positive conductive regions 221. The positive conductive regions 221 are gathered to the hollow large dots in the legend through the first guiding layer 350 and led out. The solid dots represent the negative contacts 320 arranged in the negative conductive regions 222. The negative conductive regions 222 are gathered to the solid large dots in the legend through the second guiding layer 360 and led out. The conductive regions are isolated from each other by the insulating glue 330.

[0075] It should also be noted that Figure 10 the shown electrical input device is also applicable to MBB BC solar cells, except that Figure 10 the extending direction of the conductive layer is the extending direction of the grid line pattern of the corresponding Figure 8 shown 0BB BC solar cell. When Figure 10The electric input device shown is applied to an MBB BC cell. Considering that the contact at this time touches the PDA point on the main grid line, the extending directions of the positive conductive region 221 and the negative conductive region 222 are parallel to the extending direction of the main grid line.

[0076] The arrangement of the contacts and the insulating glue 330 in this illustration will not be elaborated further. For different conductive region structures, the setting of the guiding layer is different.

[0077] Optionally, the electric input device 300 is used to apply a voltage to a battery cell. The conductive layer 220 further includes a first guiding layer 350 and a second guiding layer 360. The first guiding layer 350 connects each positive conductive region 221, causing all the positive conductive regions 221 to converge at one place. The second guiding layer 360 connects each negative conductive region 222, causing all the negative conductive regions 222 to converge at one place. It should be noted that when manufacturing the conductive layer 220, the first guiding layer 350 and the second guiding layer 360 can be manufactured together with the positive conductive region 221 and the negative conductive region 222. The four of them use the same material and the same width. Of course, they can also be manufactured step by step, and different materials and different widths can be used. The important thing is to electrically connect all the positive contacts and all the negative contacts through the conductive layer 220. In addition, there is also a situation where the first guiding layer 350 and the second guiding layer 360 are not manufactured on the insulating substrate. For example, the first guiding layer 350 and the second guiding layer 360 are connection terminals, and the positive conductive region 221 and the negative conductive region 222 can be respectively collected and led out through external wiring.

[0078] The first guiding layer 350 and the second guiding layer 360, as part of the conductive layer 220, are respectively responsible for connecting each positive conductive region 221 and negative conductive region 222 to form a complete conductive network. There are various connection methods between the guiding layer and the conductive region, which can be specifically designed according to the structure of the set conductive region. For example, each conductive region can be collected on one side or both sides of the conductive region and led out through the corresponding guiding layer, or multiple sub-guiding layers can be arranged to jump-connect each corresponding conductive region. The first guiding layer 350 collects and leads out the positive conductive region 221 to one point, and the second guiding layer 360 connects and leads out the negative conductive region 222 to one point. By connecting the first guiding layer 350 and the second guiding layer 360 to an external power source, a closed circuit can be formed in the electric input device 100, thereby realizing the processing of the battery cell. In addition, during the design process of the electric input device 100, parameters such as the width, material, and layout of the guiding layer can be optimally selected according to the characteristics of the battery cell. For example, in order to reduce resistance and improve the stability of current conduction, a metal material with high conductivity can be selected as the material of the guiding layer.

[0079] The setting of the guiding layer has good compatibility and reliability, and can customize the layout, connection mode and width of the guiding layer to ensure good contact between the guiding layer and the conductive region.

[0080] Furthermore, in Figure 10 the embodiment, each positive conductive region 221 and each negative conductive region 222 are strip-shaped, the positive conductive regions 221 and the negative conductive regions 222 are arranged in parallel and staggered in sequence along the first direction, the positive conductive regions 221 and the negative conductive regions 222 are arranged to extend along the second direction, the second direction is perpendicular to the first direction, wherein, the first direction is as Figure 10 shown in the Y-axis direction in the figure, and the second direction is the X-axis direction in the figure; a plurality of positive contacts 310 and a plurality of negative contacts 320 are respectively arranged at equal intervals along the extending direction on the positive conductive region 221 and the negative conductive region 222, wherein, the position arrangements of the plurality of positive contacts 310 and the plurality of negative contacts 320 correspond to the positive and negative grid line patterns arranged in parallel and staggered at this time. The plurality of positive contacts 310 and the plurality of negative contacts 320 can be respectively connected through the positive conductive region 221 and the negative conductive region 222.

[0081] Furthermore, the first guiding layer 350 and the second guiding layer 360 in this embodiment are spaced apart along the second direction and are located on both sides of the positive conductive region 221 and the negative conductive region 222, thereby connecting the plurality of positive conductive regions 221 and the plurality of negative conductive regions 222 together to converge to a power supply.

[0082] While in Figure 11 the embodiment, at this time, it is assumed that a section of N-region grid line and a section of P-region grid line respectively correspond to a positive contact 310 and a negative contact 320, that is, during the laser-induced sintering process, each section of grid line on the cell with such a grid line pattern contacts a contact. In order to electrically connect all the positive contacts 310 and all the negative contacts 320 respectively, there are various structural design methods for the positive conductive region 221 and the negative conductive region 222 at this time, taking Figure 11 an example given, the positive conductive region 221 and the negative conductive region 222 are arranged in parallel and alternately in sequence along the third direction, the positive conductive region 221 and the negative conductive region 222 are arranged to extend along the fourth direction, the fourth direction is perpendicular to the third direction, and along the third direction, the lengths of the positive conductive region 221 and the negative conductive region 222 in the fourth direction gradually increase and then gradually decrease. As Figure 11 shown in the figure, the third direction is, for example, the Z-axis direction, it can be seen that the third direction is neither the X-axis direction nor the Y-axis direction, but forms a certain angle with the X-axis direction. As Figure 11Taking as an example that each positive electrode conductive region 221 and each negative electrode conductive region 222 extend in a direction parallel to the diagonal direction at 45° to the X-axis, and the number of positive electrode contacts 310 and negative electrode contacts 320 connected in the direction perpendicular to this diagonal line first increases and then decreases. Therefore, the length of the corresponding conductive regions also first increases and then decreases. At this time, the arrangement of the conductive regions is simple and easy to manufacture.

[0083] Under this arrangement of the conductive regions, as an example, the first guiding layer 350 includes a first sub-guiding layer 351 and a second sub-guiding layer 352 connected perpendicularly to each other. The second guiding layer 360 includes a third sub-guiding layer 361 and a fourth sub-guiding layer 362 connected perpendicularly to each other. The first sub-guiding layer 351 and the third sub-guiding layer 361 are arranged in parallel along the second interval. The second sub-guiding layer 352 and the fourth sub-guiding layer 362 are arranged in parallel along the first direction at intervals. The first direction is perpendicular to the second direction. The first direction is, for example Figure 11 the Y-axis direction in Figure 11 and the second direction is, for example

[0084] the X-axis direction in

[0085] Among them, Figure 14 and Figure 15 give two examples when the polarities of the positive electrode conductive regions 221 and the negative electrode conductive regions 222 in the two conductive units are opposite in the second direction. At this time, the first direction is, for example Figure 14 and Figure 15 the Y-axis direction in Figure 14 and Figure 15in the X-axis direction. Further, considering that there is a certain distance between the two half pieces, there can be a certain distance between the two conductive units.

[0086] At this time, all the positive conductive regions 221 and all the negative conductive regions 222 can either converge at one place or converge at two places respectively.

[0087] More specifically, when converging at one place, as Figure 14 shown, the conductive layer further includes a first guiding layer 350 and a second guiding layer 360. The first guiding layer 350 connects one of all the positive conductive regions 221 and all the negative conductive regions 222, and the second guiding layer 360 connects the other of all the positive conductive regions 221 and all the negative conductive regions 222, so that all the positive conductive regions 221 converge at one place and all the negative conductive regions 222 converge at another place. The first guiding layer 350 includes two first sub-guiding layers 351 separately arranged on both sides of the two conductive units along the second direction and a second sub-guiding layer 352 arranged on one side of the conductive unit along the second direction. The second sub-guiding layer 352 extends along the first direction, and the first sub-guiding layer 351 is connected to the second sub-guiding layer 352. The second guiding layer 360 is arranged between the two conductive units and extends along the second direction.

[0088] When converging at two places, as Figure 15 shown, the conductive layer further includes a third guiding layer 370 and a fourth guiding layer 380 corresponding to the conductive units. The third guiding layer 370 and the fourth guiding layer 380 are separately arranged on both sides of each conductive unit along the first direction and both extend along the second direction. The third guiding layer 370 connects one of all the positive conductive regions 221 and all the negative conductive regions 222 of the conductive unit, and the fourth guiding layer 380 connects the other of all the positive conductive regions 221 and all the negative conductive regions 222 of the conductive unit. According to this Figure 15 It can be understood that since the guiding layers are arranged on both sides of each conductive unit and there is no specific distinction between the two sides, different guiding layer and conductive region schemes can be adopted.

[0089] As another embodiment, the present application also proposes an electrical input device 100. The electrical input device 100 correspondingly contacts at least one battery cell and includes a circuit board 200 and an electrode 300. The circuit board 200 includes an insulating substrate 210 and a conductive layer 220 arranged on the insulating substrate 210. The conductive layer 220 includes a plurality of positive conductive regions 221 and a plurality of negative conductive regions 222 arranged in a staggered manner;

[0090] The electrode 300 includes a plurality of positive electrode contacts 310 disposed in the positive electrode conductive region 221 and a plurality of negative electrode contacts 320 disposed in the negative electrode conductive region 222. At least one positive electrode contact 310 is provided in each positive electrode conductive region 221, and at least one negative electrode contact 320 is provided in each negative electrode conductive region 222. The positive electrode contact 310 is used for electrical contact with the N region of the battery cell, and the negative electrode contact 320 is used for electrical contact with the P region of the battery cell. The positive electrode conductive region 221 is used to connect all the positive electrode contacts 310 to the positive electrode of the external power supply, and the negative electrode conductive region 222 is used to connect all the negative electrode contacts 320 to the negative electrode of the external power supply.

[0091] The conductive layer 220 has two layers, which are respectively disposed on the first surface and the second surface of the insulating substrate 210. The positive electrode conductive region 221 and the negative electrode conductive region 222 are respectively located on the first surface and the second surface. Among them, one of the positive electrode contact 310 and the negative electrode contact 320 passes through the through hole on the circuit board 200 to the surface where the other is located.

[0092] The projections of the positive electrode conductive region 221 and the negative electrode conductive region 222 on the same plane intersect, or at least part of the positive electrode conductive region 221 and the negative electrode conductive region 222 is a closed structure.

[0093] One of the examples is Figure 5 as shown, and this solution is applicable to the battery cell with the grid line pattern as Figure 12 described. In the Figure 12 grid line pattern described, except that the thin grid in the middle part of the N region is a line, the other thin grids all form a closed structure. Similarly, Figure 12 the grid line pattern is also only exemplary. The grid line pattern may include 1, 2 or more closed thin grids. As long as there is at least one closed thin grid in the grid line pattern, it can be understood that the battery cell with the grid line pattern having closed thin grids is one type that the electrical input device 100 provided in this solution aims to solve.

[0094] Optionally, for the battery cell with the grid line pattern structure as Figure 12 described, referring to Figure 13 , the design solution of the conductive layer 220 and the contacts provided in this application is: the positive electrode conductive region 221 and the negative electrode conductive region 222 are respectively disposed on the first surface and the second surface, the projections of the positive electrode conductive region 221 and the negative electrode conductive region 222 on the same plane intersect, or at least part of the positive electrode conductive region 221 and the negative electrode conductive region 222 is a closed structure.

[0095] For the battery cell with the grid line pattern as Figure 12For the solar cell with the described grid line pattern structure, the conductive regions of the electrical input device 100 provided in the present application can also be made at least partially closed, so that the electrode contacts correspond to the grid line pattern. The projections of the positive conductive region 221 and the negative conductive region 222 on the same plane intersect. That is, after merging the projections of the first surface and the second surface, the projections of the positive conductive region 221 and the negative conductive region 222 on the same plane are not completely parallel to each other or non-contact, but have a certain intersection region. The present application can arrange the intersecting parts on both sides of the insulating substrate 210 respectively, so as to avoid interference and short-circuit hazards between the positive conductive region 221 and the negative conductive region 222.

[0096] At the same time, in some cases, the presence of the guiding layer is not necessary. For example, in some cases, the positive conductive region 221 and the negative conductive region 222 have been etched to converge to a point respectively, so there is no need to provide an additional guiding layer, and the connection to the power supply can be directly made from the convergence point. Refer to Figure 13 , a plurality of positive conductive regions 221 are arranged in an interleaved manner and connected, so that all the positive conductive regions 221 converge at one place, and a plurality of negative conductive regions 222 are arranged in an interleaved manner and connected, so that all the negative conductive regions 222 converge at one place. The first surface is only connected to the positive conductive region 221 and bypasses the negative contact, and the positive conductive regions 221 are arranged in an interleaved manner and connected. On the second surface, the negative conductive regions 222 are directly connected. Therefore, the corresponding electrical input device 100 does not require an additional guiding layer, and can be energized conveniently and effectively, and the solar cell can be processed.

[0097] The closed structure is different from the case where the projections on the same plane intersect. Its projections may not intersect. However, due to its closed structure, other conductive regions inside the conductive region corresponding to the closed fine grid structure cannot pass through the closed structure to lead out. Therefore, in this solution, the positive conductive region 221 and the negative conductive region 222 are respectively arranged on both side surfaces. Among them, a part of one side surface is a closed structure, and the closed structure corresponds to one of the N-region fine grid and the P-region fine grid in the grid line pattern described as Figure 12 , and one of the corresponding positive contact 310 and negative contact 320 on the conductive region of the closed structure is provided, and the other of the positive contact 310 and negative contact 320 is arranged on the same side and connected to the conductive region provided on the other side surface through the through hole on the circuit board 200. For example, in Figure 13 , a conductive pattern with a closed structure is provided on the first surface to connect the positive conductive region 221 with Figure 12The N region therein corresponds, and a corresponding positive electrode contact 310 is provided. Finally, they converge at one place on this side. At the same time, a negative electrode contact 320 is also provided on this side. The negative electrode contact 320 passes through a through hole on the circuit board 200 and is connected to the negative electrode conductive region 222 on the other side to make the negative electrode contact 320 conductive.

[0098] After arranging this conductive region, since the positive and negative conductive regions are on different sides, the situation of short circuit occurs less, and the insulating glue 330 can be not used or used less. By arranging the positive electrode conductive region 221 and the negative electrode conductive region 222 on different surfaces of the insulating substrate 210 respectively, the mutual interference and short circuit hidden danger between the conductive regions are avoided. At the same time, the design of the double-layer conductive layer 220 also provides greater flexibility and adaptability, and different conductive region shapes, sizes and arrangement methods can be selected according to actual needs to meet the processing requirements of the battery wafers corresponding to various gate line patterns.

[0099] Extendably, as another embodiment, the present application also proposes an electrical input device 100. The electrical input device 100 correspondingly contacts at least two battery wafers to meet the requirement of processing at least two or two kinds of battery wafers. Different from the above embodiment, the electrodes 300 are arranged on different sides of the circuit board 200, wherein the conductive layer 220 is two layers, which are respectively arranged on the first surface and the second surface of the insulating substrate 210, and the conductive patterns formed by the electrodes 300 on the first surface and the second surface are the same or different. Specifically, refer to Figure 6 , for example, Figure 10 and Figure 11 the conductive patterns described can be respectively applied to both sides of the electrical input device 100, and the corresponding contacts, insulating layers and guiding layers are arranged, so that it can be used to process the battery wafers corresponding to the gate line patterns such as Figure 8 and Figure 9 simultaneously or respectively. It can also use the same conductive pattern on both sides to process the battery wafers corresponding to two gate line patterns such as Figure 8 simultaneously or alternately.

[0100] Refer to Figure 16 , Figure 16 is a schematic structural diagram of an embodiment of the laser-induced sintering system provided by the present application. The laser-induced sintering system 400 includes the electrical input device 100 described as Figures 4 to 15 and a laser processing device 500 located above the electrical input device 100. When the laser-induced sintering system 400 performs laser-induced sintering processing on the battery wafers, the electrodes 300 of the electrical input device 100 are in contact with the gate lines of the battery wafers, and while applying a voltage to the battery wafers, a laser beam is sent through the laser processing device 500 to control the laser beam to scan the battery wafers, so as to perform laser-induced sintering processing on the battery wafers, reduce the contact resistance, and improve the photoelectric conversion efficiency.

[0101] Differing from the prior art, the present application discloses an electrical input device and a laser-induced sintering system. By forming a conductive layer on a circuit board and arranging electrode contacts on the conductive areas of the conductive layer, when pressing with a battery cell, the contacts come into contact with the corresponding grid lines of the battery cell to form an energized circuit, and thus the battery cell can be processed, especially applicable to battery cells of various back-contact batteries including 0BB BC batteries. At the same time, the electrode structure of the electrical input device is simple, with relatively low requirements for the number and arrangement of contacts. Its structure is compact and each contact is set relatively independently, facilitating inspection and maintenance. When a contact fails, other contacts can still be stably and effectively used for corresponding processing techniques, which can effectively improve the utilization rate of the electrical input device and reduce the costs in aspects such as design, application, and maintenance of the electrical input device.

[0102] The above are only the embodiments of the present application, and do not limit the patent scope of the present application. Any equivalent structure or equivalent process transformation made by using the content of the specification and drawings of the present application, or directly or indirectly applied in other related technical fields, shall be similarly included in the patent protection scope of the present application.

Claims

1. An electrical input device, characterized in that: The electric input device is used to apply voltage to at least one battery cell, and the electric input device includes: A circuit board, the circuit board comprising an insulating substrate and a conductive layer arranged on the insulating substrate, the conductive layer comprising a plurality of positive conductive areas and a plurality of negative conductive areas arranged in a staggered manner; An electrode, wherein the electrode comprises a plurality of positive contacts arranged in the positive conductive area, and a plurality of negative contacts arranged in the negative conductive area, and each of the positive conductive areas is provided with at least one positive contact, and each of the negative conductive areas is provided with at least one negative contact, the positive contact is used to electrically contact with the N area of ​​the battery cell, and the negative contact is used to electrically contact with the P area of ​​the battery cell; the positive conductive area is used to connect all the positive contacts with the positive electrode of the external power supply, and the negative conductive area is used to connect all the negative contacts with the negative electrode of the external power supply; The electrodes are arranged on the same side of the circuit board; wherein the conductive layer is only arranged on the first surface or the second surface of the insulating substrate, and the positive conductive area and the negative conductive area are located on the same side surface; multiple positive conductive areas and multiple negative conductive areas are arranged alternately with each other.

2. The electric input device according to claim 1, characterized in that When the electrical input device is used to apply voltage to one battery cell, all the positive conductive areas and all the negative conductive areas are respectively gathered at one place; or, when the electrical input device is used to apply voltage to two battery cells, all the positive conductive areas and all the negative conductive areas are respectively gathered at one place or two places.

3. The electric input device according to claim 1, characterized in that: Each of the positive electrode conductive areas and each of the negative electrode conductive areas are in a strip shape; The positive conductive area and the negative conductive area are arranged in parallel and staggered in sequence along a first direction, and the positive conductive area and the negative conductive area are extended along a second direction, and the second direction is perpendicular to the first direction; Alternatively, the positive conductive region and the negative conductive region are arranged in parallel and staggered in sequence along the third direction, the positive conductive region and the negative conductive region are extended along a fourth direction, the fourth direction is perpendicular to the third direction, and along the third direction, the lengths of the positive conductive region and the negative conductive region in the fourth direction gradually increase and then gradually decrease.

4. The electric input device according to claim 3, characterized in that: The electric input device is used to apply voltage to a battery cell, and the conductive layer also includes a first guide layer and a second guide layer, the first guide layer connects the positive conductive areas so that all the positive conductive areas are gathered together, and the second guide layer connects the negative conductive areas so that all the negative conductive areas are gathered together.

5. The electric input device according to claim 4, characterized in that: When the positive conductive area and the negative conductive area are arranged in parallel and staggered in sequence along the first direction, and the positive conductive area and the negative conductive area are extended along the second direction, the first guide layer and the second guide layer are spaced apart along the second direction and are located on both sides of the positive conductive area and the negative conductive area; Or, the positive conductive areas and the negative conductive areas are arranged in parallel and staggered sequence along the third direction, and when the positive conductive areas and the negative conductive areas are extended along the fourth direction, the first guide layer includes a first sub-guide layer and a second sub-guide layer connected vertically, and the second guide layer includes a third sub-guide layer and a fourth sub-guide layer connected vertically, the first sub-guide layer and the third sub-guide layer are arranged in parallel and spaced apart along the second direction, the second sub-guide layer and the fourth sub-guide layer are arranged in parallel and spaced apart along the first direction, the first direction is perpendicular to the second direction, and the third direction forms a certain angle with the first direction; the first sub-guide layer and the second sub-guide layer are respectively connected to the positive conductive areas closest to them, and the third sub-guide layer and the fourth sub-guide layer are respectively connected to the negative conductive areas closest to them.

6. The electric input device according to claim 1, characterized in that: Each of the positive conductive areas and each of the negative conductive areas are in a strip shape, the electrical input device is used to apply voltage to the two battery cells, all of the positive conductive areas and all of the negative conductive areas are divided into two separately arranged conductive units along a first direction, a plurality of the positive conductive areas and a plurality of the negative conductive areas in each of the conductive units are sequentially arranged in parallel and staggered along a second direction, the second direction is perpendicular to the first direction, and all of the positive conductive areas and all of the negative conductive areas are extended along the first direction; The spacing between adjacent positive conductive areas and negative conductive areas in the two conductive units is the same, and the positive conductive area or the negative conductive area in one of the conductive units corresponds to the positive conductive area or the negative conductive area in the other conductive unit in the second direction.

7. The electric input device according to claim 6, characterized in that: When all the positive conductive areas and all the negative conductive areas are respectively gathered at one place, the conductive layer further comprises a first guiding layer and a second guiding layer, the first guiding layer connects all the positive conductive areas and one of all the negative conductive areas, and the second guiding layer connects all the positive conductive areas and the other of all the negative conductive areas, so that all the positive conductive areas are gathered at one place and all the negative conductive areas are gathered at another place; the first guiding layer comprises two first sub-guiding layers separately arranged on both sides of the two conductive units along the second direction and a second sub-guiding layer arranged on one side of the conductive unit along the second direction, the second sub-guiding layer is extended along the first direction, the two first sub-guiding layers are connected to the second sub-guiding layer, and the second guiding layer is arranged between the two conductive units and extended along the second direction; When all of the positive conductive areas and all of the negative conductive areas are respectively gathered at two places, the conductive layer also includes a third guide layer and a fourth guide layer arranged corresponding to the conductive units, the third guide layer and the fourth guide layer are arranged on both sides of each of the conductive units along the first direction and extend along the second direction, the third guide layer connects all of the positive conductive areas of the conductive unit and one of the negative conductive areas, and the fourth guide layer connects all of the positive conductive areas of the conductive unit and the other of the negative conductive areas.

8. An electric input device, characterized in that: The electric input device contacts at least one battery cell, and the electric input device comprises: A circuit board, the circuit board comprising an insulating substrate and a conductive layer arranged on the insulating substrate, the conductive layer comprising a plurality of positive conductive areas and a plurality of negative conductive areas arranged in a staggered manner; An electrode, wherein the electrode comprises a plurality of positive contacts arranged in the positive conductive area, and a plurality of negative contacts arranged in the negative conductive area, and each of the positive conductive areas is provided with at least one positive contact, and each of the negative conductive areas is provided with at least one negative contact, the positive contact is used to electrically contact with the N area of ​​the battery cell, and the negative contact is used to electrically contact with the P area of ​​the battery cell; the positive conductive area is used to connect all the positive contacts with the positive electrode of the external power supply, and the negative conductive area is used to connect all the negative contacts with the negative electrode of the external power supply; The conductive layer is two layers, which are respectively arranged on a first surface and a second surface opposite to each other on the insulating substrate, the positive conductive area and the negative conductive area are respectively located on the first surface and the second surface, wherein one of the positive contact and the negative contact passes through a through hole on the circuit board to the surface where the other is located; The projections of the positive electrode conductive region and the negative electrode conductive region on the same plane intersect, or at least a portion of the positive electrode conductive region and the negative electrode conductive region is a closed structure.

9. The electric input device according to claim 8, characterized in that: The plurality of positive electrode conductive areas are staggered and connected, so that all the positive electrode conductive areas are gathered at least at one place, and the plurality of negative electrode conductive areas are staggered and connected, so that all the negative electrode conductive areas are gathered at least at one place.

10. An electric input device, characterized in that: The electrical input device contacts at least two battery cells correspondingly, and the electrical input device comprises: A circuit board, the circuit board comprising an insulating substrate and a conductive layer arranged on the insulating substrate, the conductive layer comprising a plurality of positive conductive areas and a plurality of negative conductive areas arranged in a staggered manner; An electrode, wherein the electrode comprises a plurality of positive contacts arranged in the positive conductive area, and a plurality of negative contacts arranged in the negative conductive area, and each of the positive conductive areas is provided with at least one positive contact, and each of the negative conductive areas is provided with at least one negative contact, the positive contact is used to electrically contact with the N area of ​​the battery cell, and the negative contact is used to electrically contact with the P area of ​​the battery cell; the positive conductive area is used to connect all the positive contacts with the positive electrode of the external power supply, and the negative conductive area is used to connect all the negative contacts with the negative electrode of the external power supply; The electrodes are arranged on different sides of the circuit board, wherein the conductive layer is two layers, which are respectively arranged on the first surface and the second surface opposite to each other on the insulating substrate, and the conductive patterns formed by the electrodes on the first surface and the second surface are the same or different.

11. The electric input device according to any one of claims 1 to 10, characterized in that: The width of the positive electrode conductive area and the negative electrode conductive area ranges from 300 μm to 600 μm.

12. The electric input device according to any one of claims 1 to 10, characterized in that: The width of the positive electrode contact is smaller than that of the positive electrode conductive area, the width of the negative electrode contact is smaller than that of the negative electrode conductive area, and the width of the positive electrode contact and the negative electrode contact ranges from 10 μm to 500 μm.

13. The electric input device according to any one of claims 1 to 10, characterized in that: The number of the positive conductive areas and the number of the negative conductive areas are both 160-250, the number of the positive contacts on each positive conductive area is 1-100, and the number of the negative contacts on each negative conductive area is 1-100.

14. The electric input device according to any one of claims 1 to 10, characterized in that: The positive electrode contact and the negative electrode contact are in point or line shape.

15. The electric input device according to any one of claims 1 to 10, characterized in that: The positive electrode contact and the negative electrode contact are elastic contacts.

16. The electric input device according to claim 15, characterized in that The elastic contact comprises an elastic sheet, one end of which is fixed on the conductive layer, and a rebound gap is formed between the elastic sheet and the conductive layer.

17. The electric input device according to any one of claims 1 to 10, characterized in that: The electric input device further includes an insulating glue at least filled between the positive electrode conductive area and the negative electrode conductive area.

18. A laser induced sintering system, characterized in that: It comprises the electric input device as claimed in any one of claims 1 to 17, and a laser processing device located above the electric input device.

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