Solar cell sintering processing device
By using transparent brackets and probe sets in the solar cell sintering treatment device, the problem of probe structure bracket blocking laser light is solved, and the laser processing effect and voltage distribution uniformity are improved.
Patent Information
- Application Number
- CN202421478262.4
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-06-26
- Publication Date
- 2025-04-22
- Estimated Expiration
- 2034-06-26
AI Technical Summary
During the laser processing of solar cells, the bracket of the probe structure will block the laser irradiation, affecting the laser processing effect.
A solar cell sintering treatment device is designed, using a transparent bracket and a probe set, with mounting holes arranged at intervals on the transparent bracket. The probe is positioned through these hole positions to contact the gate line convergence point of the battery cell to reduce the obstruction of the laser.
The transparent bracket reduces the occlusion of laser light, improves the laser processing effect of solar cells, and ensures uniform voltage distribution through uniform contact of the probe set.
Smart Images
Figure CN222783918U_ABST
Abstract
Description
Technical Field
[0001] The present application relates to the field of solar cell manufacturing, and in particular to a solar cell sintering processing device. Background Art
[0002] In the related technology of laser processing of solar cells, it is often necessary to simultaneously use a probe structure to apply a reverse voltage to the solar cell. However, when the probe structure applies a reverse voltage to the solar cell, the bracket for mounting the probe in the probe structure will block the laser irradiation, affecting the laser processing effect of the laser on the solar cell. Utility Model Content
[0003] The embodiment of the present application discloses a solar cell sintering processing device, which is used to reduce the shading effect of the probe structure therein on the laser.
[0004] In order to achieve the above-mentioned purpose, the present application discloses a solar cell sintering processing device having a probe structure, which includes:
[0005] A conductive base, the conductive base is used to place the battery cell, and the conductive base is electrically connected to a power source;
[0006] A transparent bracket, the transparent bracket is located above the conductive base, and the transparent bracket is provided with a plurality of installation holes arranged at intervals, each of the installation holes is arranged corresponding to a grid line confluence point of the battery cell;
[0007] A probe group, wherein the probe group includes a plurality of probes, each of the probes is respectively inserted into a corresponding mounting hole, and one end of each of the probes is electrically connected to the power supply.
[0008] As an optional implementation, the probe group further includes a conductive sheet, the conductive sheet is connected to the plurality of probes, and the plurality of probes are electrically connected to the power supply through the conductive sheet.
[0009] As an optional implementation, the conductive sheet is disposed on the outer peripheral surface of the probe, and the surface of the conductive sheet along its own thickness direction is connected to the outer peripheral surface of the probe.
[0010] As an optional implementation, the thickness of the conductive sheet is 0.1 mm-0.5 mm.
[0011] As an optional implementation, there are multiple probe groups, each of which is evenly spaced apart, and there are multiple conductive sheets, which are respectively connected to the multiple probes of the corresponding probe groups.
[0012] As an optional implementation, a plurality of the conductive sheets are sequentially connected in parallel and connected to the power source via wires.
[0013] As an optional embodiment, a contact portion is provided at one end of the probe facing the conductive base, the contact portion is configured to contact the grid line confluence point of the solar cell, and the projected area of the contact portion on the grid line confluence point is larger than the projected area of the probe on the grid line confluence point; and / or
[0014] An elastic member is disposed at one end of the probe, and the elastic member is configured to provide an elastic effect when the probe contacts the battery sheet.
[0015] As an optional implementation, the conductive base is provided with adsorption holes, and the adsorption holes are configured to be connected to a gas supply device so as to adsorb the battery cell placed on the conductive base.
[0016] As an optional implementation, the solar cell sintering processing device further includes a laser emitter and the probe structure as described in the first aspect, and the laser emitter is arranged corresponding to the conductive base of the probe structure.
[0017] As an optional implementation, the solar cell sintering processing device further includes a regulating module, and the regulating module is used to regulate the laser energy emitted by the laser emitter.
[0018] Compared with the prior art, the beneficial effects of this application are:
[0019] The present application discloses a solar cell sintering treatment device, which has a probe structure, and the probe structure includes a conductive base, a transparent bracket and a probe group. The conductive base is used to place the battery cell and is electrically connected to the power supply. The transparent bracket is arranged above the conductive base, and a plurality of mounting holes arranged at intervals are provided on the transparent bracket, and each mounting hole is respectively arranged corresponding to the grid line confluence point of the battery cell. The probe group includes a plurality of probes, each probe is respectively arranged corresponding to the mounting hole, and one end of the probe away from the mounting hole is electrically connected to the power supply. The probe structure can avoid blocking the laser emitted by the solar cell sintering treatment device through the setting of the transparent bracket, so as to improve the laser treatment effect of the solar cell sintering treatment device on the battery cell. In addition, the mounting hole on the transparent bracket can position the probe to the grid line confluence point of the battery cell, so that the probe evenly distributes the voltage to the entire battery cell through the grid line confluence point of the battery cell, further effectively improving the laser treatment effect of the solar cell sintering treatment device on the battery cell. BRIEF DESCRIPTION OF THE DRAWINGS
[0020] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings required for use in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.
[0021] Figure 1 A schematic diagram of the structure of the probe disclosed in the embodiments of the present application;
[0022] Figure 2 for Figure 1 The enlarged view of point A in the middle;
[0023] Figure 3 A top view of the probe structure disclosed in the embodiment of the present application;
[0024] Figure 4 This is a schematic diagram of the structure of the solar cell sintering processing device disclosed in the embodiment of the present application.
[0025] Description of reference numerals:
[0026] 100. Solar cell sintering processing device; 1. Laser emitter; 2. Probe structure; 21. Conductive base; 22. Transparent bracket; 221. Mounting hole; 23. Probe group; 231. Probe; 231a. Contact part; 232. Conductive sheet; 200. Solar cell; 201. Grid line junction; 300. Power supply; 301. Wire. DETAILED DESCRIPTION
[0027] The following will be combined with the drawings in the embodiments of the present application to clearly and completely describe the technical solutions in the embodiments of 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 creative work are within the scope of protection of this application.
[0028] In this application, the terms "upper", "lower", etc. indicate positions or positional relationships based on the positions or positional relationships shown in the drawings. These terms are mainly used to better describe the present application and its embodiments, and are not used to limit the indicated devices, elements, or components to have a specific orientation, or to be constructed and operated in a specific orientation.
[0029] In addition, some of the above terms may be used to express other meanings in addition to indicating orientation or positional relationship. For example, the term "on" may also be used to express a certain dependency or connection relationship in some cases. For those of ordinary skill in the art, the specific meanings of these terms in this application can be understood according to specific circumstances.
[0030] In addition, the terms "disposed", "provided with", and "connected" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral structure; it can be a mechanical connection, or an electrical connection; it can be a direct connection, or an indirect connection through an intermediate medium, or it can be an internal connection between two devices, elements, or components. For those of ordinary skill in the art, the specific meanings of the above terms in this application can be understood according to specific circumstances.
[0031] In addition, the terms "first", "second", etc. are mainly used to distinguish different devices, elements or components (the specific types and structures may be the same or different), and are not used to indicate or imply the relative importance and quantity of the indicated devices, elements or components. Unless otherwise specified, "plurality" means two or more.
[0032] In the related art, when laser processing is performed on solar cells (hereinafter referred to as cells), it is often necessary to simultaneously apply a reverse voltage to the solar cells using a probe structure, thereby reducing the contact resistance of the cells and avoiding damage to the passivation effect of the passivation film layer of the cells. However, the bracket on which the probe is installed will cause a certain degree of shading to the laser irradiated on the cells, which will affect the excitation of the carriers of the cells.
[0033] The present application discloses a probe structure and a solar cell sintering treatment device. The probe structure disclosed in the present application reduces the light shielding of the bracket on the cell, so that the laser treatment effect on the cell is improved. In addition, the probe of the probe structure has a good contact effect with the cell, and the probe can be used to evenly distribute the voltage to the entire surface of the cell, thereby improving the problem of uneven voltage distribution on the cell.
[0034] The technical solution of the present application is further described below in conjunction with embodiments and drawings.
[0035] Please also see Figure 1 and Figure 2 The present application discloses a solar cell sintering processing device 100, which has a probe structure 2, and the probe structure 2 includes a conductive base 21, a transparent bracket 22, and a probe group 23. The conductive base 21 is used to place the battery cell 200 and is electrically connected to the power supply 300. The transparent bracket 22 is arranged above the conductive base 21, and a plurality of mounting holes 221 arranged at intervals are provided on the transparent bracket 22, and each mounting hole 221 is respectively arranged corresponding to the grid line confluence point 201 of the battery cell 200. The probe group 23 includes a plurality of probes 231, each probe 231 is respectively corresponding to the mounting hole 221, and one end of the probe 231 extending from the mounting hole 221 is electrically connected to the power supply 300.
[0036] Specifically, when the cell 200 is placed on the conductive base 21, the probe 231 on the transparent bracket 22 abuts against the cell 200. When the probe 231 contacts the cell 200, the probe 231 is connected to the grid line confluence point 201 of the cell 200 through the mounting hole 221 on the transparent bracket 22. The grid line confluence point 201 of the cell 200 is the intersection of multiple secondary grid lines on the cell 200. The probe 231 can evenly distribute the voltage from the grid line connected to the grid line confluence point 201 to the entire cell 200 through the grid line confluence point 201. In this way, the transparent bracket 22 can effectively improve the pass rate of the laser from the transparent bracket 22 by utilizing its own transparent characteristics, which is beneficial to improving the laser processing effect of the cell 200. In addition, the mounting hole 221 is used to achieve positioning contact between the probe 231 and the grid line busbar 201 of the battery cell 200 , which is beneficial for more uniform distribution of voltage on the battery cell 200 , further improving the laser processing effect on the battery cell 200 .
[0037] It can be understood that the probe 231 is connected to the negative pole of the power supply 300, and the conductive base 21 is connected to the positive pole of the probe 231. Through the connection between the probe 231, the conductive base 21 and the power supply 300, a positive and negative pole loop is formed, and then a reverse voltage is applied to the battery cell 200 placed on the conductive base 21.
[0038] Optionally, the transparent support 22 may be a transparent plate, a transparent block or a transparent base. Taking the transparent support as a transparent plate as an example, considering that the transparent support 22 may have a certain refractive index, in some embodiments, when the transparent support 22 is a transparent plate, it may be a transparent flat plate. By using a transparent flat plate, the refractive index and absorption rate of the transparent flat plate to the laser are low, so that the laser has a better passing rate on the transparent flat plate, and the processing effect of the laser on the battery cell 200 is improved.
[0039] Optionally, the projection area of the transparent plate on the conductive base 21 is larger than the projection area of the battery cell 200 on the conductive base 21. For example, the transparent plate may be a substantially square plate or a circular plate, but no matter what shape the transparent plate is, as long as the projection area of the transparent plate on the conductive base 21 is larger than the projection area of the battery cell 200 on the conductive base 21. In this way, the probes 231 disposed on the transparent plate can be well arranged on the entire surface of the battery cell 200, so that the voltage can be well conducted to the entire surface of the battery cell 200 through each probe 231.
[0040] In some embodiments, the probe group 23 also includes a conductive sheet 232, which is connected to a plurality of probes 231, and the plurality of probes 231 are electrically connected to the power supply 300 through the conductive sheet 232. Since the number of probes 231 is large, if each probe 231 is connected to the power supply 300 using a wire 301, the wiring of the wire 301 on the transparent bracket 22 may be messy, which may cause shading to the laser, and more wiring is more difficult for later replacement and maintenance. Therefore, the present application uses a conductive sheet 232 between the probe groups 23 to connect each probe 231 in sequence, and then the conductive sheet 232 is connected to the power supply 300 to realize power supply to each probe 231. In this way, the conductive sheet 232 can effectively reduce the wiring on the probe structure 2, so that the structure is optimized and more concise, and the laser shading is reduced while also facilitating the subsequent maintenance of the probe group 23.
[0041] Since the conductive sheet 232 itself has a certain width, considering the shading effect of the conductive sheet 232 on the laser, in some embodiments, the conductive sheet 232 can be arranged on the outer peripheral surface of the probe 231, and the surface of the conductive sheet 232 along its own thickness direction is connected to the outer peripheral surface of the probe 231. In other words, the conductive sheet 232 is a sheet-like structure, which itself has two wider surfaces on both sides, and the rest are narrower narrow sides. Specifically, the wider surface on one side of the conductive sheet 232 is connected to each probe 231 in sequence, which can improve the stability of the connection of the probe 231. The direction of the narrower side of the conductive sheet 232 is consistent with the projection direction of the laser, and the wider side surfaces of the conductive sheet 232 will not block the projection of the laser on the battery cell 200, and the laser processing effect on the battery cell 200 is improved.
[0042] Optionally, the thickness of the conductive sheet 232 may be 0.1 mm-0.5 mm, specifically 0.1 mm, 0.2 mm, 0.3 mm, 0.4 mm, 0.5 mm, etc. It is understandable that the thickness of the conductive sheet 232 is the width of its narrower side. By setting the conductive sheet 232 to a thinner thickness, when the laser is projected, the narrower the thickness of the conductive sheet 232, the smaller the shading effect of the conductive sheet 232 on the laser, and the better the processing effect of the laser on the battery cell 200.
[0043] See also Figure 3 In some embodiments, the probe groups 23 may be multiple groups, and each group of probe groups 23 is evenly and spacedly arranged on the transparent support 22. That is, when the probe groups 23 contact the battery cell 200, the probes 231 of each probe group 23 are evenly arranged on one side surface of the battery cell 200, so that the voltage distribution on the battery cell 200 is also relatively uniform.
[0044] Exemplarily, if the cell 200 is a square cell 200 , each probe group 23 forms a square dot matrix on the cell 200 , and each grid line bus point 201 on the cell 200 is in contact with a probe 231 , so that the cell 200 can evenly distribute voltage.
[0045] There can be multiple conductive sheets 232, and the multiple conductive sheets 232 are respectively connected to the multiple probes 231 of the corresponding probe group 23. In other words, each probe group 23 is provided with a conductive sheet 232, so that the probes 231 on the probe group 23 can be electrically connected to each other. That is, each probe group 23 uses a conductive sheet 232 to communicate with the power supply 300, which reduces the number of overall wiring of each probe group 23, reduces the light shielding of the wire 301, and improves the simplicity of the probe structure 2.
[0046] In some embodiments, the conductive sheets 232 of each probe group 23 are sequentially connected in parallel and connected to the power supply 300 through the wire 301. Specifically, each conductive sheet 232 is first connected, and then a single wire 301 is used to connect each conductive sheet 232 connected in parallel to the power supply 300. In this way, the arrangement of the wire 301 can be further reduced, the wiring of the probe structure 2 as a whole can be reduced, and the overall structural layout can be optimized.
[0047] In some embodiments, a contact portion 231a is provided at one end of the probe 231 facing the conductive base 21, and the contact portion 231a is configured to contact the grid line bus 201 of the solar cell. The probe 231 is in contact with the grid line bus 201 through the contact portion 231a, and the voltage can be better transmitted from the probe 231 to the cell 200 through the contact portion 231a, thereby improving the stability of the voltage applied by the probe 231 to the cell 200.
[0048] Furthermore, the projected area of the contact portion 231a on the gate line bus 201 is larger than the projected area of the probe 231 on the gate line bus 201. In this way, the probe 231 can contact the battery cell 200 through the contact portion 231a, thereby increasing the contact area between the probe 231 and the gate line bus 201, so that the probe 231 and the gate line bus 201 are better aligned and connected.
[0049] In other embodiments, an elastic member (not shown) is provided at one end of the probe 231 away from the mounting hole 221, and the elastic member is configured to provide an elastic effect when the probe 231 contacts the battery cell 200. It is understandable that the probe 231, as a conductive component, is usually made of metal materials such as copper and aluminum. In order to prevent the probe 231 from causing contact damage to the battery cell 200 when the probe 231 abuts against the battery cell 200, an elastic member is provided at the probe 231, and the elastic member can absorb the kinetic energy during contact, so that the probe 231 can form an elastic mechanical contact with the battery cell 200 when the probe 231 contacts the battery cell 200. In this way, the mechanical buffering safety when the probe 231 contacts the battery cell 200 is improved, avoiding damage to the battery cell 200.
[0050] Optionally, the elastic member may be, but is not limited to, a spring, a spring sheet, an elastomer, etc., and the present application does not make any specific limitation thereto.
[0051] Considering that the battery cell 200 needs to be fixed when placed on the conductive base 21 to prevent the battery cell 200 from falling from the conductive base 21. Considering that the usual fixing structure, such as a clip, a pressure plate, etc., may cause shading, wear and other problems to the battery cell 200 during the fixing process, based on this, in some embodiments, an adsorption hole (not shown) is opened on the conductive base 21, and the adsorption hole can be connected to the air supply device through an air suction pipe to adsorb the battery cell 200 placed on the conductive base 21. The present application enables the battery cell 200 to be firmly adsorbed on the conductive base 21 by adsorption, thereby improving the mechanical stability of the battery cell, and is not easy to cause damage to the battery cell 200, thereby effectively protecting the battery cell 200.
[0052] Please see again Figure 4 In some embodiments, the solar cell sintering processing device 100 further includes a laser emitter 1. The probe structure 2 is used to place the cell 200 and apply a reverse voltage to the cell 200. The laser emitter 1 is used to perform laser processing on the cell 200 on the probe structure 2.
[0053] In the present application, the probe structure 2 uses a transparent bracket 22 to improve the transmittance of the laser and reduce the shading of the laser. However, when the laser passes through the transparent bracket 22, the transparent bracket 22 will absorb part of the energy of the transmitted laser, resulting in the laser energy irradiated on the battery cell 200 being weakened, affecting the laser treatment effect on the battery cell 200.
[0054] In some embodiments, the solar cell sintering processing device 100 further includes an adjustment module (not shown), which is electrically connected to the laser emitter 1 and is used to adjust the laser energy emitted by the laser. In this way, the laser emitted by the laser emitter 1 is adjusted by the adjustment module to compensate for the energy loss when the laser passes through the transparent bracket 22, so that the laser emitted by the laser emitter 1 can effectively perform laser processing on the solar cell 200.
[0055] Optionally, the regulating module may include but is not limited to a power regulator, a pulse regulator, etc., and the emission pulse or emission power of the laser transmitter may be adjusted by the regulating module to achieve the effect of enhancing the laser energy.
[0056] The solar cell sintering processing device disclosed in the embodiment of the present application is introduced in detail. Specific examples are used in this article to illustrate the principles and implementation methods of the present application. The description of the above embodiments is only used to help understand the solar cell sintering processing device of the present application and its core idea; at the same time, for general technical personnel in this field, according to the idea of the present application, there will be changes in the specific implementation method and application scope. In summary, the content of this specification should not be understood as a limitation on the present application.
Claims
1. A solar cell sintering processing device having a probe structure, characterized in that: The probe structure comprises: A conductive base, the conductive base is used to place the battery cell, and the conductive base is electrically connected to a power source; A transparent bracket, the transparent bracket is located above the conductive base, and the transparent bracket is provided with a plurality of installation holes arranged at intervals, each of the installation holes is arranged corresponding to a grid line confluence point of the battery cell; A probe group, wherein the probe group includes a plurality of probes, one end of each of the probes is respectively inserted into the corresponding mounting hole, and the other end of each of the probes is electrically connected to the power supply.
2. The solar cell sintering processing device according to claim 1, characterized in that: The probe group further includes a conductive sheet, wherein the conductive sheet is connected to the plurality of probes, and the plurality of probes are electrically connected to the power supply through the conductive sheet.
3. The solar cell sintering processing device according to claim 2, characterized in that: The conductive sheet is disposed on the outer peripheral surface of the probe, and the surface of the conductive sheet along its own thickness direction is connected to the outer peripheral surface of the probe.
4. The solar cell sintering processing device according to claim 3, characterized in that: The thickness of the conductive sheet is 0.1 mm-0.5 mm.
5. The solar cell sintering processing device according to claim 2, characterized in that: There are multiple probe groups, each of which is evenly spaced. There are multiple conductive sheets, and each of which is respectively connected to multiple probes of the corresponding probe group.
6. The solar cell sintering treatment device according to claim 5, characterized in that: A plurality of the conductive sheets are sequentially connected in parallel and connected to the power source through conductive wires.
7. The solar cell sintering processing device according to any one of claims 1 to 6, characterized in that: A contact portion is provided at one end of the probe facing the conductive base, the contact portion is configured to contact the grid line busbar of the cell, and a projection area of the contact portion on the grid line busbar is larger than a projection area of the probe on the grid line busbar; and / or An elastic member is disposed at one end of the probe, and the elastic member is configured to provide an elastic effect when the probe contacts the battery sheet.
8. The solar cell sintering processing device according to any one of claims 1 to 6, characterized in that: The conductive base is provided with adsorption holes, and the adsorption holes are configured to be connected with the air supply device so as to adsorb the battery sheet placed on the conductive base.
9. The solar cell sintering treatment device according to any one of claims 1 to 6, characterized in that: The solar cell sintering processing device also includes a laser emitter, and the laser emitter is arranged corresponding to the conductive base of the probe structure.
10. The solar cell sintering treatment device according to claim 9, characterized in that: The solar cell sintering processing device also includes a regulating module, and the regulating module is used to adjust the laser energy emitted by the laser emitter.