Laser-induced sintering processing device

Abstract

The utility model provides a laser-induced sintering processing device which comprises a bearing device, the bearing device comprises a bearing table used for bearing a battery piece, the laser-induced sintering processing device is provided with a processing station, an electric input module and a laser processing module are arranged corresponding to the processing station, and the laser processing module is located above the bearing table. The electric input module comprises at least one electric input unit, and each electric input unit comprises a first electrode and a second electrode which are both located below the bearing surface of the bearing table and are in electric contact with a positive electrode and a negative electrode on the back surface of the back contact battery borne by the bearing table respectively; the laser processing module comprises at least two laser processing units, the laser processing units adopt laser beams to scan the battery pieces while reverse voltage is applied to the battery pieces, and the laser beams of the at least two laser processing units jointly scan the battery pieces. The laser-induced sintering processing device provided by the utility model comprises at least two laser processing units which are used for scanning the battery piece together, so that the processing efficiency can be improved.

Description

Technical Field

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

[0002] The contact resistance between the electrodes of crystalline silicon solar cells 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. In order to reduce the contact resistance, the applicant uses laser induced sintering technology to excite battery carriers through lasers and promote the mutual diffusion of metals and silicon wafers under the action of the reverse voltage of the external electric field, thereby obtaining excellent contact characteristics after sintering.

[0003] Among them, when using laser induced sintering technology, electrodes are needed to contact the positive electrode and the negative electrode of the battery cell respectively in order to apply voltage to the battery cell. Especially for back-contact battery cells, since the positive electrode and the negative electrode on the battery cell are all located on the back side and the number of electrodes on the battery cell is dense, how to improve its laser induced sintering capacity becomes a technical problem that needs to be solved. Utility Model Content

[0004] In view of this, the present application provides a laser induced sintering processing device, including a carrying device, the carrying device including a carrying platform for carrying a back contact battery, the laser induced sintering processing device has a processing station, and an electric input module and a laser processing module are arranged corresponding to the processing station, and the laser processing module is located above the carrying platform.

[0005] The electric input module includes at least one electric input unit, and the electric input unit includes a first electrode and a second electrode. The first electrode and the second electrode are both located below the carrying surface of the carrier, and are respectively used to electrically contact the positive electrode and the negative electrode on the back side of the back-contact battery carried by the carrier, and the carrier includes a hollow portion for the first electrode and the second electrode to pass through; the laser processing module includes at least two laser processing units, and the laser processing unit uses a laser beam to scan the battery cell while a reverse voltage is applied to the battery cell, and the laser beams of at least two of the laser processing units scan the battery cell together.

[0006] Preferably, each of the laser processing units comprises a laser and a laser scanning mechanism, and the laser scanning mechanism is used to control the scanning direction of the laser beam.

[0007] Preferably, the laser processing module includes a laser and a beam splitter. The laser beam emitted by the laser forms at least two split beams after passing through the beam splitter. A laser scanning mechanism is arranged on the optical path of each split beam, and the laser scanning mechanism is used to control the scanning direction of the laser beam; wherein at least two of the laser processing units share the beam splitter, that is, the laser scanning mechanism and the beam splitter corresponding to each split beam optical path respectively constitute one of the laser processing units.

[0008] Preferably, the spectrometer is a geometric space spectrometer.

[0009] Preferably, the electrical input module comprises at least two electrical input units, and the number of the electrical input units is the same as the number of the laser processing units.

[0010] Preferably, the laser induced sintering processing device also includes a positioning station arranged upstream of the processing station, and a visual positioning mechanism is arranged at the positioning station. The visual positioning mechanism is located below the supporting surface of the supporting platform to obtain the position information of the grid line or PAD point or MARK mark point on the back of the battery.

[0011] Preferably, the electric input module also includes a longitudinal displacement mechanism and a horizontal position adjustment mechanism connected to the longitudinal displacement mechanism via a first frame, the electric input unit is connected to the horizontal position adjustment mechanism, and the horizontal position adjustment mechanism is used to adjust the position of the electric input unit in the horizontal plane.

[0012] Preferably, the electric input module includes at least two electric input units, the number of the electric input units is the same as the number of the laser processing units, the horizontal position adjustment mechanism includes at least two horizontal position adjustment units, the number of the horizontal position adjustment units is the same as the number of the electric input units, at least two of the horizontal position adjustment units are connected to the longitudinal displacement mechanism, and one of the horizontal position adjustment units is used to drive one of the electric input units to move.

[0013] Preferably, the first electrode and the second electrode each include at least one row of strip electrodes arranged along a first direction, and the first direction is perpendicular or parallel to an extension direction of the gate lines on the battery cell.

[0014] Preferably, a supporting device is also provided at the processing station, and the supporting device is located below the laser processing module and above the supporting platform. The supporting device includes a transparent supporting plate and a lifting mechanism connected to the transparent supporting plate, and the lifting mechanism drives the transparent supporting plate to move closer to or away from the supporting platform. The transmittance of the transparent supporting plate to the laser beam emitted by the laser processing module is above 95%.

[0015] Preferably, the carrying device is a turntable module, the turntable module includes a rotary drive mechanism and a plurality of the carrying platforms connected to the periphery of the rotary drive mechanism, and the rotary drive mechanism is used to drive the carrying platforms to rotate through the processing stations.

[0016] Preferably, a loading station and an unloading station are also provided on the rotating path of the rotating drive mechanism, and the rotating drive mechanism drives the carrier platform to pass through the loading station, the processing station and the unloading station in sequence; a loading conveying mechanism is provided corresponding to the loading station, and a unloading conveying mechanism is provided corresponding to the unloading station, and the loading conveying mechanism and the unloading conveying mechanism are at least two groups of conveying belts arranged side by side, and the arrangement direction of the at least two groups of conveying belts is perpendicular to the conveying direction of the conveying belts.

[0017] Preferably, a loading rotary transport arm is further provided corresponding to the loading station, the loading rotary transport arm comprises a second rotary drive actuator, a second rotary arm connected to the second rotary drive actuator, and at least two second suction cups connected to the end of the second rotary arm, the loading rotary transport arm is located above the carrier platform, and the second rotary drive actuator is used to drive the second suction cup to move back and forth between the loading station and the loading conveying mechanism;

[0018] A rotating conveying arm for unloading is also provided corresponding to the unloading station. The rotating conveying arm for unloading includes a first rotating drive actuator, a first rotating arm connected to the first rotating drive actuator, and at least two first suction cups connected to the end of the first rotating arm. The rotating conveying arm for unloading is located above the supporting platform. The first rotating drive actuator is used to drive the first suction cup to move back and forth between the unloading station and the unloading conveying mechanism.

[0019] Preferably, a first placement position is provided on the side of the unloading conveying mechanism, and the first placement position is located on the rotation path of the unloading rotating conveying arm, a first bearing member is provided at the first placement position, and the first rotating driving actuator is further used to drive the first suction cup to move back and forth between the unloading station and the first bearing member;

[0020] Alternatively, a first placement position is provided on the side of the loading and conveying mechanism, and the first placement position is located on the rotation path of the loading rotating conveying arm, and a first carrier is provided at the first placement position, and the second rotating driving actuator is also used to drive the second suction cup to move back and forth between the loading station and the first carrier.

[0021] Compared with the prior art, the laser induced sintering processing device proposed in the present application includes at least two laser processing units, and the laser beams of at least two laser processing units scan the battery sheet together, which can improve the processing efficiency. When a standard whole sheet is carried on the support platform, the laser beams of at least two laser processing units can scan a standard whole sheet together; when a back-contact battery in the form of multiple slices is carried on the support platform, the laser beam of one laser processing unit scans one slice, and multiple slices are scanned together. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the related technologies, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on the provided drawings without paying any creative work.

[0023] The structures, proportions, sizes, etc. illustrated in the drawings of this specification are only used to match the contents disclosed in the specification so as to facilitate understanding and reading by persons familiar with this technology. They are not used to limit the conditions under which this application can be implemented, and therefore have no substantive technical significance. Any structural modification, change in proportion or adjustment of size, without affecting the effects and purposes that can be achieved by this application, should still fall within the scope of the technical contents disclosed in this application.

[0024] Figure 1 A schematic structural diagram of a laser induced sintering processing device according to an embodiment of the present application.

[0025] Figure 2 A schematic diagram of the structure of a laser processing module according to an embodiment of the present application.

[0026] Figure 3 A schematic diagram of the structure of an electric input module according to an embodiment of the present application.

[0027] Figure 4 A schematic structural diagram of a laser induced sintering processing device according to another embodiment provided in the present application.

[0028] Figure 5 A schematic diagram of the structure of a support device according to an embodiment of the present application.

[0029] Figure 6 The optical path principle diagram of the spectroscopy provided in this application adopts the spatial geometric spectroscopy method. DETAILED DESCRIPTION

[0030] The following will be combined with the drawings in the embodiments of the present application to clearly and completely describe the embodiments in the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of this application.

[0031] In order to make the above-mentioned objects, features and advantages of the present application more obvious and easy to understand, the present application is further described in detail below in conjunction with the accompanying drawings and specific implementation methods.

[0032] like Figure 1 As shown, a laser induced sintering processing device is proposed, including a carrying device 100, the carrying device 100 includes a carrying platform 110 for carrying a back contact battery sheet, the laser induced sintering processing device has a processing station B, and an electric input module 200 and a laser processing module are arranged corresponding to the processing station B. The laser processing module is located above the carrying platform 110, and the electric input module 200 includes at least one electric input unit 210. The electric input unit 210 includes a first electrode and a second electrode. The first electrode and the second electrode are both located below the carrying surface of the carrying platform 110, and are used to connect to the positive electrode and the positive electrode of the power supply, respectively. The negative electrode is electrically connected, and is also used to electrically contact the positive electrode and the negative electrode on the back of the back contact battery carried by the carrier 110. The carrier 110 includes a hollow portion (not shown in the figure) for the first electrode and the second electrode to pass through, so that when the first electrode and the second electrode need to contact the back of the back contact battery, the first electrode and the second electrode pass through the hollow portion to contact the back; the laser processing module includes at least two laser processing units 310, and the laser processing unit 310 uses a laser beam to scan the battery cell while a reverse voltage is applied to the battery cell. The laser beams of at least two laser processing units 310 scan the battery cell together. It should be noted that the common scanning of the battery cell here means that the laser beams of at least two laser processing units 310 can scan the battery cell simultaneously or not completely simultaneously, and are not limited to complete consistency in time.

[0033] Among them, the laser processing module can also include three laser processing units 310, four laser processing units 310, five laser processing units 310, six laser processing units 310 or even more, that is, the laser processing module can provide three laser beams, four laser beams, five laser beams, six laser beams or even more.

[0034] Specifically, the carrier device 100 can be a turntable module or other structure, and the specific structure of the turntable module is shown below. In order to adsorb and fix the battery cell to prevent the battery cell from shifting, an adsorption member can be provided on the carrier 110 or an adsorption channel can be provided on the carrier 110 itself, and the battery cell is adsorbed and fixed through the adsorption member or the adsorption channel. Among them, processing station B is a station where the battery cell is contacted by the electric input module 200 and the laser processing module uses a laser beam to scan and process the battery cell. As described above, this station is provided with an electric input module 200 and a laser processing module. The specific structure of the first electrode and the second electrode can be found in the detailed description below.

[0035] It should be noted that the first electrode and the second electrode are respectively used to connect to the positive and negative electrodes of the power supply, which does not mean that the first electrode can only be connected to the positive electrode of the power supply. The first electrode can be connected to the positive or negative electrode of the power supply. When the first electrode is connected to the positive electrode of the power supply, the second electrode is connected to the negative electrode of the power supply. At this time, the first electrode is electrically contacted with the positive electrode on the battery cell, and the second electrode is electrically contacted with the negative electrode on the battery cell; when the first electrode is connected to the negative electrode of the power supply, the second electrode is connected to the positive electrode of the power supply, the first electrode is electrically contacted with the negative electrode on the battery cell, and the second electrode is electrically contacted with the positive electrode on the battery cell.

[0036] By jointly scanning the cell with the laser beams of at least two laser processing units 310, the production capacity can be improved. It should be noted that the carried back-contact cell can be a standard whole piece or in the form of multiple slices (two or more slices). The multiple slices can be obtained by slicing the standard whole piece, or can be formed by directly making the main grid line into multiple sections on the standard whole piece without slicing. When the placed back-contact battery is in the form of multiple slices, each slice corresponds to at least one electrical input unit 210, so that laser induced sintering can be performed on each slice. When a standard whole piece is carried on the carrier 110, the laser beams of at least two laser processing units 310 can jointly scan the same standard whole piece; when a multi-slice back-contact battery is carried on the carrier 110, the laser beam of one laser processing unit 310 scans one slice, and multiple slices are scanned together in one processing station.

[0037] In addition, by arranging the first electrode and the second electrode below the carrying surface of the carrying platform 110, laser induced sintering can be completed in one processing station without the problem of electrode blocking the laser. Compared with the solution of processing by two laser processing modules in two processing stations to avoid blocking the laser, the present application does not need to transport the battery cell during processing, which can reduce the error caused by position change and improve the processing accuracy. It can also reduce the calibration error of the laser and the visual positioning mechanism and improve the processing accuracy.

[0038] Among them, there are at least two specific forms of the laser processing unit 310. The first one is that each laser processing unit 310 includes a laser 311 and a laser scanning mechanism 312. The laser 311 is used to emit a laser beam, and the laser scanning mechanism 312 is used to control the scanning direction of the laser beam. The common laser scanning mechanism 312 is composed of a galvanometer plus a field mirror. According to actual needs, each laser processing unit 310 can also include other required optical devices. This method is simple to implement. In addition, in this method, the scanning width of at least two laser beams can cover the entire battery cell width.

[0039] The second type, such as Figure 2 As shown, the laser processing module includes a laser 311 and a beam splitter 313. The laser 311 is used to emit a laser beam. The laser beam emitted by the laser 311 forms at least two split beams after passing through the beam splitter 313. A laser scanning mechanism 312 is arranged on the optical path of each split beam. The laser scanning mechanism 312 is used to control the scanning direction of the laser beam. At least two laser processing units 310 share the beam splitter 313, that is, the laser scanning mechanism 312 and the beam splitter 313 corresponding to each split beam optical path constitute a laser processing unit 310. In this way, at least two laser beams can be formed by splitting. When the splitting scheme is adopted, the laser power can be increased, and the light output effect of the laser beam after splitting is consistent with the single beam without splitting, and the functionality is consistent. In addition, when scanning the battery cell by splitting, the scanning width of at least two laser beams can cover the entire battery cell width. This scheme only requires one laser, saves material costs, reduces failure rate, and can control the parameters of at least two laser beams to be consistent, ensuring good consistency of processing.

[0040] The beam splitter 313 is preferably a geometrical space beam splitter. The geometrical beam splitting method can be achieved by placing several sub-light sources in parallel according to the required beam splitting spacing, and focusing them separately through focusing mirrors installed on the paths of the beams to obtain the required number and spacing of beam splitting. Figure 6 As shown, taking the two split light beams obtained after splitting as an example, a laser beam is incident on a beam splitter (such as a geometric space type beam splitter) and is split into two beams of equal power, one of which is a reflected light beam 1 and the other is a transmitted light beam 2. The two split light beams pass through the corresponding reflector 1 and reflector 2 respectively. By adjusting the angles of reflector 1 and reflector 2, any desired splitting angle θ can be achieved.

[0041] As another embodiment, the battery cell carried by the carrier platform 110 is in the form of multiple slices, and the number of slices is at least two. Correspondingly, the electric input module 200 includes at least two electric input units 210, and the number of electric input units 210 is the same as the number of laser processing units 310. Thus, one slice is laser induced sintered through one electric input unit 210 and one laser processing unit 310.

[0042] As another embodiment, the laser induced sintering processing device also includes a positioning station arranged upstream of the processing station B, and a visual positioning mechanism 800 is arranged at the positioning station, and the visual positioning mechanism 800 is located below the bearing surface of the carrier 110 to obtain the position information of the grid line or PAD point or MARK mark point on the back of the battery. In other words, the carrier 110 first obtains the position information of the grid line or PAD point or MARK mark point at the positioning station through the visual positioning mechanism 800, and then performs laser induced sintering processing at the processing station B. After obtaining the position information through the visual positioning mechanism 800, it is convenient for the first electrode and the second electrode to align the grid line or PAD point of the contact battery to improve the processing accuracy. Among them, the visual positioning mechanism 800 includes but is not limited to a CCD camera, and the positioning station can be set at the loading station A, or the positioning station can be set between the loading station A and the processing station B.

[0043] As another example, Figure 3 As shown, the electric input module 200 further includes a longitudinal displacement mechanism 220 and a horizontal position adjustment mechanism 240 connected to the longitudinal displacement mechanism 220 via a first frame 230. The electric input unit 210 is connected to the horizontal position adjustment mechanism 240. The horizontal position adjustment mechanism 240 is used to adjust the position of the electric input unit 210 on the horizontal plane. The position of the horizontal plane may include any direction on the horizontal plane, such as a first direction (e.g. Figure 3 The X-axis direction in the second direction (e.g. Figure 3 The first electrode and the second electrode may be moved in the Y-axis direction of the back contact battery, or in other directions. In addition, the first electrode and the second electrode may be rotated to change their positions. The driving actuator in the longitudinal displacement mechanism 220 may be a motor or a cylinder. The longitudinal displacement mechanism 220 may enable the first electrode and the second electrode in the electrical input unit 210 to move to the electrodes on the back of the back contact battery when needed, and no longer contact when not needed.

[0044] The horizontal position adjustment mechanism 240 can be used to adjust the positions of the first electrode and the second electrode in the electrical input unit 210 in the horizontal plane so that they are accurately aligned with the grid lines or pad points on the battery, thereby improving the processing accuracy. The structure of the horizontal position adjustment mechanism 240 can be various, for example, it can include three driving mechanisms arranged in a right triangle, wherein the driving directions of the two driving mechanisms located on the hypotenuse are parallel to each other, and the driving direction of the remaining third driving mechanism is perpendicular to the driving directions of the two driving mechanisms located on the hypotenuse. When it is necessary to drive the first electrode and the second electrode to rotate horizontally, the three driving mechanisms can move simultaneously. Alternatively, the horizontal position adjustment mechanism 240 is an XYθ motion platform in the prior art. Of course, the horizontal position adjustment mechanism 240 can also be other conventional structures in the prior art.

[0045] As another embodiment, the back-contact battery carried by the support platform 110 is in a multi-slice form, and the number of the multi-slices is at least two. Correspondingly, the electric input module 200 includes at least two electric input units 210, and the number of the electric input units 210 is the same as the number of the laser processing units 310. The horizontal position adjustment mechanism 240 includes at least two horizontal position adjustment units 241, and the number of the horizontal position adjustment units 241 is the same as the number of the electric input units 210. At least two horizontal position adjustment units 241 are connected to the longitudinal displacement mechanism 220, and one horizontal position adjustment unit 241 is used to drive one electric input unit 210 to move. Therefore, each slice can not only be laser induced sintered by the corresponding electric input unit 210 and the laser processing unit 310, but also because the positions of the first electrode and the second electrode in the electric input unit 210 corresponding to each slice can be adjusted by the corresponding horizontal position adjustment unit 241, the processing accuracy of each slice can be guaranteed.

[0046] As another embodiment, the first electrode and the second electrode both include at least one row of strip electrodes arranged along a first direction, and the first direction is perpendicular or parallel to the extension direction of the grid lines on the battery cell. Wherein, the reason why the first electrode and the second electrode are strip-shaped is that the grid lines on the battery cell are strip-shaped, and the specific structures of the first electrode and the second electrode can be any one of a probe row, a conductive wire, a conductive plate with a pattern, or a conductive strip (at this time, it can be in surface contact with the battery cell). Specifically, the probe row structure refers to a plurality of probes arranged in a line connected on a probe support, and the positive electrode and the negative electrode on the back of the battery cell are contacted through a plurality of probes. Preferably, the probe is elastic, and the form of the elastic probe can be that the probe is hollow and a spring is arranged inside, or the probe is solid and the probe itself is elastic, and the probe is set to be elastic to avoid damaging the battery cell. A conductive plate with a pattern refers to an electrode pattern on a conductive plate that contains a point contact with the grid lines or PAD on the back of the battery cell. In short, the structure of the first electrode and the second electrode is designed according to the electrode arrangement on the back of the battery cell to ensure that the battery cell can be uniformly applied with voltage when it is contacted by the first electrode and the second electrode.

[0047] Preferably, the first electrode and the second electrode are probe rows, and the elastic probes contact the contact points (PAD points) on the back contact battery sheet. It should be noted that the grid lines on the back contact battery are usually arranged in an alternating manner with the positive and negative electrodes, so the first electrode and the second electrode are also arranged in an alternating manner accordingly.

[0048] Furthermore, the first electrode and the second electrode in the electric input unit 310 can pass through the hollow portion and electrically contact the front electrode and the back electrode on the back side of the back contact cell under the drive of the longitudinal displacement mechanism 220 .

[0049] As another example, Figure 1 and Figure 5 As shown, a support device 500 is also provided at processing station B, and the support device 500 is located below the laser processing module and above the carrier 110. The support device 500 includes a transparent support plate 510 and a lifting mechanism 520 connected to the transparent support plate 510. The lifting mechanism 520 drives the transparent support plate 510 to approach or move away from the carrier 110. The transparent support plate 510 has a transmittance of more than 95% for the laser beam emitted by the laser processing module. By providing the transparent support plate 510, it can provide support when the first electrode and the second electrode rise to contact the back contact battery, and at the same time, it is set to be transparent so that the laser beam can pass through to scan and process the battery sheet.

[0050] As another example, Figure 4As shown, the carrier device 100 is a turntable module, which includes a rotary drive mechanism 120 and a plurality of carriers 110 connected to the peripheral side of the rotary drive mechanism 120, and the rotary drive mechanism 120 is used to drive the carriers 110 to rotate through the processing station B. Specifically, the turntable module may also include a support seat, and the plurality of carriers 110 are connected to the rotary drive mechanism 120 through the support seat, and the rotary drive mechanism 120 is, for example, a DD motor. The carrier device 100 in the form of a turntable module can realize rapid transportation and mass production of battery cells.

[0051] As another example, Figure 4 As shown, a loading station A and a unloading station C are also provided on the rotating path of the rotary drive mechanism 120. The rotary drive mechanism 120 drives the carrier 110 to pass through the loading station A, the processing station B, and the unloading station C in sequence; a loading conveying mechanism 410 is provided corresponding to the loading station A, and a unloading conveying mechanism 610 is provided corresponding to the unloading station C. Both the loading conveying mechanism 410 and the unloading conveying mechanism 610 are at least two groups of conveying belts arranged side by side, and the arrangement direction of at least two groups of conveying belts is perpendicular to the conveying direction of the conveying belts. The battery cells can be transported to the loading station A by the loading conveying mechanism 410, and the processed battery cells can be transported away by the unloading conveying mechanism 610. Specifically, when the loading conveying mechanism 410 and the unloading conveying mechanism 610 respectively have two groups of conveying belts, two slices can be transported at the same time.

[0052] Furthermore, when the number of the support platforms 110 is four, the loading station A, the spare function station D, the processing station B and the unloading station C are sequentially arranged on the rotation path of the rotating drive mechanism 120. The spare function station D can be used for other functions, such as film dropping or other functions.

[0053] As another embodiment, a loading rotary conveying arm 420 is further provided corresponding to the loading station A, and the loading rotary conveying arm 420 includes a second rotary drive actuator, a second rotary arm connected to the second rotary drive actuator, and at least two second suction cups connected to the end of the second rotary arm. The loading rotary conveying arm 420 is located above the supporting platform 110, and the second rotary drive actuator is used to drive the second suction cup to move back and forth between the loading station A and the loading conveying mechanism 410; a unloading rotary conveying arm 620 is further provided corresponding to the unloading station C, and the unloading rotary conveying arm 620 includes a first rotary drive actuator, a first rotary arm connected to the first rotary drive actuator, and at least two first suction cups connected to the end of the first rotary arm. The unloading rotary conveying arm 620 is located above the supporting platform 110, and the first rotary drive actuator is used to drive the first suction cup to move back and forth between the unloading station C and the unloading conveying mechanism 610. By providing the loading rotating transport arm 420 and the unloading rotating transport arm 620, it is convenient to transport the battery cells from the loading conveying mechanism 410 to the carrier 110 and to transport the battery cells from the carrier 110 to the unloading conveying mechanism 610. Since the loading rotating transport arm 420 and the unloading rotating transport arm 620 are both in the form of rotational drive, their operation speed is faster, which can improve the production capacity, especially compared with the transport mechanism with linear movement. In addition, since the loading rotating transport arm 420 and the unloading rotating transport arm 620 each have at least two suction cups, at least two slices can be transported at one time.

[0054] As another embodiment, a first placement position E is provided on the side of the unloading conveying mechanism 610, and the first placement position E is located on the rotation path of the unloading rotating conveying arm 620, a first carrier 700 is provided at the first placement position E, and the first rotary drive actuator is also used to drive the first suction cup to move back and forth between the unloading station C and the first carrier 700; or, a first placement position E is provided on the side of the loading conveying mechanism 410, and the first placement position E is located on the rotation path of the loading rotating conveying arm 420, a first carrier 700 is provided at the first placement position E, and the second rotary drive actuator is also used to drive the second suction cup to move back and forth between the loading station A and the second carrier 700. Among them, the first carrier 700 is used to carry defective battery cells or cached battery cells, and the first carrier 700 can be a material box, or a carrier plate or a carrier table, as long as it is a device that can carry battery cells, and preferably the first carrier 700 is a material box.

[0055] For example, taking the first placement position E located on the rotation path of the unloading rotary transport arm 620 as an example, when the first carrier 700 is used to carry defective battery cells, before the unloading rotary transport arm 620 unloads the battery cells to the unloading conveying mechanism 610, the battery cells are photographed by a visual positioning mechanism such as a CCD camera to identify whether the battery cells are damaged. For example, a visual positioning mechanism is set at the loading station A, which can not only check whether there is damage, but also photograph the battery cells so that the electrodes in the electrical input module adjust their positions according to the photographing results so that the electrodes in the electrical input module are aligned with the positions where the battery cells need to contact. By setting the first carrier 700 on the side of the unloading conveying mechanism 610, defective battery cells such as broken pieces in the processing process can be placed in the first carrier 700. Of course, if there is a scenario where the unloading and unloading beats do not match and the battery cells transmitted by the loading need to be cached, the battery cells can also be cached in the first carrier 700. By setting the first placement position on the rotation path of the unloading rotating conveying arm 620, one unloading rotating conveying arm 620 can not only convey the battery cells to the unloading conveying mechanism 610 but also convey the battery cells to the first placement position E, which saves costs and has a simple structure.

[0056] For example Figure 4 As shown, the first placement position E is located on the rotation path of the unloading rotary transport arm 620. Before the unloading rotary transport arm 620 obtains the battery cell carried by the carrier 110 corresponding to the unloading station C, the battery cell is photographed by a visual positioning mechanism such as a CCD camera to identify whether the battery cell is damaged. For example, a visual positioning mechanism is set at the loading station A. By setting the first carrier 700 on the side of the unloading conveying mechanism 610, the bad battery cell such as broken pieces can be placed in the first carrier 700. Of course, if the unloading and loading beats do not match and the battery cell transmitted by the loading needs to be cached, the battery cell can also be cached in the first carrier 700. By setting the first placement position E on the rotation path of the unloading rotary transport arm 620, a unloading rotary transport arm 620 can not only transport the battery cell from the carrier 110 corresponding to the unloading station C to the unloading conveying mechanism 610, but also transport the battery cell from the carrier 110 corresponding to the unloading station C to the first placement position E, which saves costs and has a simple structure.

[0057] For example, taking the first placement position E located on the rotation path of the loading rotary transport arm 420 as an example, before the loading rotary transport arm 420 obtains the battery cell on the loading conveying mechanism 410, the battery cell is photographed by a visual positioning mechanism such as a CCD camera to identify whether the battery cell is damaged, for example, a visual mechanism is set above the loading conveying mechanism 410. By setting the first carrier 700 on the side of the loading conveying mechanism 410, the bad battery cell before loading, such as broken pieces, can be placed in the first carrier 700. Of course, if the loading and unloading beats do not match and the battery cell transmitted by the loading needs to be cached, the battery cell can also be cached in the first carrier 700. By setting the first placement position on the rotation path of the loading rotary transport arm 420, a loading rotary transport arm 420 can not only transport the battery cell from the loading conveying mechanism 410 to the carrier 110 corresponding to the loading station A, but also transport the battery cell from the loading conveying mechanism 410 to the first placement position E, which saves costs and has a simple structure.

[0058] In this specification, each embodiment is described in a progressive, parallel, or progressive and parallel manner. Each embodiment focuses on the differences from other embodiments, and the same or similar parts between the embodiments can be referred to each other. For the device disclosed in the embodiment, since it corresponds to the method disclosed in the embodiment, the description is relatively simple, and the relevant parts can be referred to the method part.

[0059] The above description of the disclosed embodiments enables those skilled in the art to implement or use the present application. Various modifications to these embodiments will be apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present application. Therefore, the present application will not be limited to the embodiments shown herein, but will conform to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A laser induced sintering processing device, comprising a carrying device, the carrying device comprising a carrying platform for carrying a back contact battery, the laser induced sintering processing device having a processing station, an electric input module and a laser processing module are arranged corresponding to the processing station, the laser processing module is located above the carrying platform, and is characterized in that , The electric input module includes at least one electric input unit, and the electric input unit includes a first electrode and a second electrode. The first electrode and the second electrode are both located below the carrying surface of the carrier, and are respectively used to electrically contact the positive electrode and the negative electrode on the back side of the back-contact battery carried by the carrier, and the carrier includes a hollow portion for the first electrode and the second electrode to pass through; the laser processing module includes at least two laser processing units, and the laser processing unit uses a laser beam to scan the battery cell while a reverse voltage is applied to the battery cell, and the laser beams of at least two of the laser processing units scan the battery cell together.

2. The laser induced sintering device according to claim 1, characterized in that: Each of the laser processing units includes a laser and a laser scanning mechanism, and the laser scanning mechanism is used to control the scanning direction of the laser beam.

3. The laser induced sintering device according to claim 1, characterized in that: The laser processing module includes a laser and a beam splitter. The laser beam emitted by the laser forms at least two split beams after passing through the beam splitter. A laser scanning mechanism is arranged on the optical path of each split beam, and the laser scanning mechanism is used to control the scanning direction of the laser beam. At least two of the laser processing units share the beam splitter, that is, the laser scanning mechanism and the beam splitter corresponding to each split beam optical path constitute a laser processing unit respectively.

4. The laser induced sintering device according to claim 3, characterized in that: The spectrometer is a geometric space spectrometer.

5. The laser induced sintering device according to claim 1, characterized in that: The electric input module includes at least two electric input units, and the number of the electric input units is the same as the number of the laser processing units.

6. The laser induced sintering device according to claim 1, characterized in that: The laser induced sintering processing device also includes a positioning station arranged upstream of the processing station, and a visual positioning mechanism is arranged at the positioning station. The visual positioning mechanism is located below the supporting surface of the supporting platform to obtain the position information of the grid line or PAD point or MARK mark point on the back of the battery.

7. The laser induced sintering device according to claim 1, characterized in that: The electric input module also includes a longitudinal displacement mechanism and a horizontal position adjustment mechanism connected to the longitudinal displacement mechanism via a first frame, the electric input unit is connected to the horizontal position adjustment mechanism, and the horizontal position adjustment mechanism is used to adjust the position of the electric input unit in the horizontal plane.

8. The laser induced sintering device according to claim 7, characterized in that: The electric input module includes at least two electric input units, and the number of the electric input units is the same as the number of the laser processing units. The horizontal position adjustment mechanism includes at least two horizontal position adjustment units, and the number of the horizontal position adjustment units is the same as the number of the electric input units. At least two of the horizontal position adjustment units are connected to the longitudinal displacement mechanism, and one of the horizontal position adjustment units is used to drive one of the electric input units to move.

9. The laser induced sintering device according to claim 1, characterized in that: The first electrode and the second electrode each include at least one row of strip electrodes arranged along a first direction, and the first direction is perpendicular or parallel to an extension direction of the grid lines on the cell.

10. The laser induced sintering device according to claim 1, characterized in that: A supporting device is also provided at the processing station, and the supporting device is located below the laser processing module and above the supporting platform. The supporting device includes a transparent supporting plate and a lifting mechanism connected to the transparent supporting plate. The lifting mechanism drives the transparent supporting plate to approach or move away from the supporting platform. The transmittance of the transparent supporting plate to the laser beam emitted by the laser processing module is above 95%.

11. The laser induced sintering device according to any one of claims 1 to 10, characterized in that: The carrying device is a turntable module, which includes a rotation drive mechanism and a plurality of the carrying platforms connected to the periphery of the rotation drive mechanism. The rotation drive mechanism is used to drive the carrying platforms to rotate through the processing stations.

12. The laser induced sintering device according to claim 11, characterized in that: A loading station and an unloading station are also arranged on the rotating path of the rotating drive mechanism, and the rotating drive mechanism drives the carrier platform to pass through the loading station, the processing station and the unloading station in sequence; a loading conveying mechanism is arranged corresponding to the loading station, and a unloading conveying mechanism is arranged corresponding to the unloading station, and the loading conveying mechanism and the unloading conveying mechanism are at least two groups of conveying belts arranged side by side, and the arrangement direction of the at least two groups of conveying belts is perpendicular to the conveying direction of the conveying belts.

13. The laser induced sintering device according to claim 12, characterized in that: A loading rotary transport arm is also provided corresponding to the loading station, and the loading rotary transport arm includes a second rotary drive actuator, a second rotary arm connected to the second rotary drive actuator, and at least two second suction cups connected to the end of the second rotary arm. The loading rotary transport arm is located above the carrier platform, and the second rotary drive actuator is used to drive the second suction cup to move back and forth between the loading station and the loading conveying mechanism. A rotating conveying arm for unloading is also provided corresponding to the unloading station. The rotating conveying arm for unloading includes a first rotating drive actuator, a first rotating arm connected to the first rotating drive actuator, and at least two first suction cups connected to the end of the first rotating arm. The rotating conveying arm for unloading is located above the supporting platform. The first rotating drive actuator is used to drive the first suction cup to move back and forth between the unloading station and the unloading conveying mechanism.

14. The laser induced sintering device according to claim 13, characterized in that: A first placement position is provided on the side of the unloading conveying mechanism, and the first placement position is located on the rotation path of the unloading rotating conveying arm. A first bearing member is provided at the first placement position, and the first rotating driving actuator is also used to drive the first suction cup to move back and forth between the unloading station and the first bearing member; Alternatively, a first placement position is provided on the side of the loading and conveying mechanism, and the first placement position is located on the rotation path of the loading rotating conveying arm, and a first carrier is provided at the first placement position, and the second rotating driving actuator is also used to drive the second suction cup to move back and forth between the loading station and the first carrier.

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