Laser-assisted sintering device

Abstract

The utility model relates to the field of photovoltaic technology, and discloses a laser-assisted sintering device which comprises a bearing table used for bearing a battery piece, the battery piece comprises a plurality of main grid lines, and each main grid line comprises a plurality of welding disc points; the pressurizing assembly comprises a bearing support, adjusting blocks and a probe row, the adjusting blocks are movably connected with the bearing support, and the two ends of the probe row are connected with the two corresponding adjusting blocks respectively; the probe rows are in one-to-one correspondence with the main grid lines, each probe row comprises a plurality of probes, each main grid line comprises a middle branch and two end branches, and the two end branches are located at the two ends of the middle branch respectively in the extension direction of the main grid lines; and at least one welding disc point in the middle branch and at least one welding disc point in the two end part branches correspond to the probes in the corresponding probe rows. While the ohmic contact effect is improved, the risk of damage to the battery piece is effectively reduced.

Description

Technical Field

[0001] The present application relates to the field of photovoltaic technology, and more specifically, to a laser-assisted sintering device. Background Art

[0002] Solar cells are electronic products with high precision and high cleanliness. They are one of the components of solar cell modules. Their main function is to convert light energy into electrical energy, thereby realizing solar power generation. Since solar energy is a renewable and clean energy, the market demand for solar cells is increasing, and higher requirements are placed on the quality and speed of solar cell production and processing.

[0003] In the prior art, in order to improve the ohmic contact effect between the metal grid lines and the cells in solar cells, a laser line scanning process is usually adopted, and then an L-shaped probe is used to press the pad point areas on both sides of the main grid to form a reverse voltage and match the front laser line scanning, thereby forming an auxiliary sintering effect.

[0004] However, because the main grid itself has a certain resistance after sintering, when the reverse voltage is applied to form a current, the current is affected by the resistance of the cell itself and the main grid resistance during the transmission process, and the current gradually decreases, making it difficult to form a good ohmic contact in the middle area. In order to form a better ohmic contact in the middle area, higher voltage and current are usually used to assist in sintering the cell, but high current and voltage will damage the cell and cannot achieve better photoelectric conversion efficiency. Utility Model Content

[0005] In view of this, the present application provides a laser-assisted sintering device, which effectively reduces the risk of cell damage while improving the ohmic contact effect.

[0006] The present application provides a laser-assisted sintering device, comprising: a supporting platform, the supporting platform is used to support a battery cell, the battery cell includes multiple main grid lines, and the main grid lines include multiple welding pads; a pressurizing component, the pressurizing component includes a supporting bracket, an adjusting block and a probe row, along the extension direction of the main grid lines, both sides of the supporting platform are provided with supporting brackets, and the supporting brackets are located on the side of the battery cell away from the supporting platform, the adjusting block is movably connected to the supporting bracket, the number of adjusting blocks connected to one supporting bracket is the same as the number of main grid lines, the probe row corresponds to the adjusting blocks connected to the same supporting bracket one by one, and the two ends of the probe row are respectively connected to the two corresponding adjusting blocks; the probe row corresponds to the main grid lines one by one, the probe row includes multiple probes, and the main grid lines include a middle branch and two end branches, along the extension direction of the main grid lines, the two end branches are respectively located at the two ends of the middle branch, at least one welding pad point located in the middle branch and at least one welding pad point located in the two end branches correspond to the probes in the corresponding probe rows.

[0007] Optionally, the probes in the probe row correspond one to one with the pads in the corresponding main grid lines.

[0008] Optionally, the probe row includes a connecting bracket and probes, the two ends of the connecting bracket are respectively connected to two corresponding adjustment blocks, the probes are located on a side of the connecting bracket close to the battery cell, and the probes are connected to the connecting bracket via an elastic connector.

[0009] Optionally, the connecting bracket includes a connected bracket body and multiple connecting seats, the connecting seat is located on the side of the bracket body close to the battery cell, and a groove is provided on the side of the connecting seat away from the bracket body; in the same probe row, the probes correspond to the connecting seats one by one, and one end of the probe is located in the groove of the corresponding connecting seat and connected to the bottom of the groove, and the other end of the probe is located outside the groove of the corresponding connecting seat.

[0010] Optionally, the height of the probe in a direction perpendicular to the plane where the battery cell is located is greater than the height of the groove in a direction perpendicular to the plane where the battery cell is located.

[0011] Optionally, the elastic connecting member is a spring.

[0012] Optionally, a width of the probe row along a first direction is less than or equal to 0.2 mm, wherein the first direction is perpendicular to an extension direction of the main grid line and the first direction is in the direction of a plane where the battery cell is located.

[0013] Optionally, the material of the probe row is copper, and the surface of the copper probe row is plated with gold.

[0014] Optionally, the laser-assisted sintering device further includes a laser device, and the laser device is located on a side of the probe row away from the battery cell.

[0015] Optionally, the carrier platform and the probe row are electrically connected to the positive and negative electrodes of an external power supply respectively, and the voltage of the negative electrode of the external power supply is 10-15V.

[0016] Compared with the prior art, the laser-assisted sintering device provided in this application achieves at least the following beneficial effects:

[0017] In the laser-assisted sintering device provided by the present application, the probe row corresponds to the main grid line one by one, the probe row includes a plurality of probes, and the main grid line includes a middle branch and two end branches. Along the extension direction of the main grid line, the two end branches are respectively located at the two ends of the middle branch, and at least one pad point located in the middle branch and at least one pad point located in the two end branches correspond to the probes in the corresponding probe row, so that during laser sintering, different probes in the probe row can be respectively contacted with at least one pad point located in the middle branch and at least one pad point located in the two end branches, so that a reverse voltage can be provided to at least one pad point located in the middle branch and at least one pad point located in the two end branches at the same time, so that in the main grid line, the current on the middle branch tends to be the same as the current on the end branch, effectively improving the ohmic contact effect in the middle area of ​​the battery cell, that is, effectively improving the overall ohmic contact effect. At the same time, there is no need to increase the voltage value of the reverse voltage provided to the probe in the probe row, so that the ohmic contact effect in the middle area of ​​the battery cell can be improved, thereby avoiding the damage of the battery cell caused by the excessively high voltage value of the reverse voltage, and effectively reducing the risk of battery cell damage.

[0018] Of course, any product implementing this application does not necessarily need to achieve all of the technical effects described above at the same time.

[0019] Other features and advantages of the present application will become apparent from the following detailed description of exemplary embodiments of the present application with reference to the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] The accompanying drawings, which are incorporated in and constitute a part of the specification, illustrate embodiments of the application and, together with the description, serve to explain the principles of the application.

[0021] Figure 1 is a top view of a laser-assisted sintering device provided in the present application;

[0022] Figure 2 It is a top view of the battery cell provided in the present application located on the supporting platform;

[0023] Figure 3 yes Figure 1 A front view of the laser assisted sintering device;

[0024] Figure 4 It is a schematic diagram of the local structure of a probe row provided in this application. DETAILED DESCRIPTION

[0025] Various exemplary embodiments of the present application will now be described in detail with reference to the accompanying drawings. It should be noted that unless otherwise specifically stated, the relative arrangement of components and steps, numerical expressions and numerical values ​​set forth in these embodiments do not limit the scope of the present application.

[0026] The following description of at least one exemplary embodiment is merely illustrative in nature and is in no way intended to limit the present application, its application, or uses.

[0027] Technologies, methods, and systems known to ordinary technicians in the relevant art may not be discussed in detail, but where appropriate, the technologies, methods, and systems should be considered part of the specification.

[0028] In all examples shown and discussed herein, any specific values ​​should be interpreted as merely exemplary and not limiting. Therefore, other examples of the exemplary embodiments may have different values.

[0029] It should be noted that like reference numerals and letters refer to similar items in the following figures, and therefore, once an item is defined in one figure, it need not be further discussed in subsequent figures.

[0030] Figure 1 is a top view of a laser-assisted sintering device provided in this application, Figure 2 This is a top view of the battery cell provided in the present application located on a carrier platform. Figure 3 yes Figure 1 A front view of the laser assisted sintering device, referring to Figure 1-Figure 3 The present embodiment provides a laser-assisted sintering device, which includes: a carrier 10, the carrier 10 is used to carry a battery cell 20, the battery cell 20 includes a plurality of busbars 21, and the busbars 21 include a plurality of pads 22;

[0031] A pressurizing component 30, the pressurizing component 30 includes a bearing bracket 31, an adjusting block 32 and a probe row 33. Along the extension direction of the main grid line 21, bearing brackets 31 are provided on both sides of the bearing platform 10, and the bearing brackets 31 are located on the side of the battery cell 20 away from the bearing platform 10. The adjusting block 32 is movably connected to the bearing bracket 31. The number of adjusting blocks 32 connected to one bearing bracket 31 is the same as the number of the main grid lines 21. The probe row 33 corresponds to the adjusting blocks 32 connected to the same bearing bracket 31 one by one, and the two ends of the probe row 33 are respectively connected to the two corresponding adjusting blocks 32;

[0032] The probe row 33 corresponds one-to-one to the main grid line 21. The probe row 33 includes multiple probes 331, and the main grid line 21 includes a middle branch 211 and two end branches 212. Along the extension direction of the main grid line 21, the two end branches 212 are respectively located at the two ends of the middle branch 211, and at least one solder pad point 22 located in the middle branch 211 and at least one solder pad point 22 located in the two end branches 212 correspond to the probe 331 in the corresponding probe row 33.

[0033] Specifically, the laser assisted sintering device provided in the present application includes a carrier 10 and a pressurizing assembly 30. Among them, the carrier 10 is used to carry the battery cell 20. The pressurizing assembly 30 includes a carrier bracket 31, an adjustment block 32 and a probe row 33. Along the extension direction of the main grid line 21 in the battery cell 20, both sides of the carrier 10 are provided with a carrier bracket 31, and the carrier bracket 31 is located on the side of the battery cell 20 away from the carrier 10. A plurality of adjustment blocks 32 are connected to the carrier bracket 31, and the number of adjustment blocks 32 connected to a carrier bracket 31 is the same as the number of main grid lines 21 in the battery cell 20. The probe row 33 corresponds to the adjustment blocks 32 connected to the same carrier bracket 31 one by one, and the two ends of the probe row 33 are respectively connected to the two corresponding adjustment blocks 32. That is, the adjustment blocks 32 connected to the two carrier brackets 31 correspond to each other one by one, and the two ends of the same probe row 33 are respectively connected to the two corresponding adjustment blocks 32.

[0034] The adjusting block 32 is movably connected to the supporting bracket 31 . The probe row 33 includes a plurality of probes 331 . The adjusting block 32 can drive the probe row 33 connected thereto to move up and down, thereby achieving contact between the probes 331 on the probe row 33 and the corresponding pads 22 on the main grid lines 21 .

[0035] The main grid line 21 includes a middle branch 211 and two end branches 212. Along the extension direction of the main grid line 21, the two end branches 212 are respectively located at the two ends of the middle branch 211. At least one solder pad point 22 located in the middle branch 211 and at least one solder pad point 22 located in the two end branches 212 correspond to the probe 331 in the corresponding probe row 33, that is, at least one solder pad point 22 located in the middle branch 211 and at least one solder pad point 22 located in the two end branches 212 have a probe 331 corresponding to them, that is, during laser sintering, voltage can be provided to at least one solder pad point 22 located in the middle branch 211 and at least one solder pad point 22 located in the two end branches 212 at the same time through different probes 331.

[0036] In a specific implementation process, the cell 20 can be placed on the carrier 10, and the probe row 33 can be driven to move toward the direction close to the cell 20 by the movement of the adjustment block 32, until the probes 331 in the probe row 33 contact the pads 22 on the corresponding main grid lines 21. A forward voltage is provided to the carrier 10, and a reverse voltage is provided to the probes 331 in the probe row 33, which effectively reduces the contact resistivity between the main grid lines 21 and the substrate of the cell 20, thereby achieving an ohmic contact effect, which is beneficial to improving the photoelectric conversion effect of the cell 20.

[0037] Since the probe row 33 corresponds to the main grid line 21 one by one, the probe row 33 includes a plurality of probes 331, and the main grid line 21 includes a middle branch 211 and two end branches 212, along the extension direction of the main grid line 21, the two end branches 212 are respectively located at the two ends of the middle branch 211, and at least one pad point 22 located in the middle branch 211 and at least one pad point 22 located in the two end branches 212 correspond to the probes 331 in the probe row 33 corresponding thereto, so that during laser sintering, different probes in the probe row 33 can be used to 331 is in contact with at least one pad point 22 located in the middle branch 211 and at least one pad point 22 located in the two end branches 212 respectively, so that a reverse voltage can be provided to at least one pad point 22 located in the middle branch 211 and at least one pad point 22 located in the two end branches 212 at the same time, so that in the main grid line 21, the current on the middle branch 211 and the current on the end branch 212 tend to be the same, effectively improving the ohmic contact effect of the middle area of ​​the battery cell 20, that is, effectively improving the overall ohmic contact effect.

[0038] At the same time, the ohmic contact effect in the middle area of ​​the battery cell 20 can be improved without increasing the voltage value of the reverse voltage provided to the probe 331 in the probe row 33, thereby avoiding damage to the battery cell 20 caused by excessively high reverse voltage values ​​and effectively reducing the risk of damage to the battery cell 20.

[0039] Continue to refer Figure 1-Figure 3 In some optional embodiments, the probes 331 in the probe row 33 correspond one to one with the pads 22 in the corresponding main grid lines 21 .

[0040] Specifically, the probes 331 in the probe row 33 correspond one to one with the pad points 22 in the corresponding main grid lines 21, that is, each pad point 22 in each main grid line 21 in the battery cell 20 corresponds to a probe 331, so that during laser sintering, each probe 331 in each probe row 33 can be respectively contacted with the corresponding pad point 22, and each pad point 22 in each main grid line 21 in the battery cell 20 can be respectively contacted with the corresponding probe 331, so that each pad point 22 can be provided with a reverse voltage at the same time through each pad point 22, so that the current transmission on each main grid line 21 is more uniform, that is, the current in each area of ​​each main grid line 21 tends to be the same, which is beneficial to further improve the overall ohmic contact effect.

[0041] It should be noted that Figure 2 and Figure 3It is exemplified that the number of main grid lines 21 in the battery cell 20 is 5, the number of solder pads 22 in each main grid line 21 is 5, and accordingly, the number of probe rows 33 is also 5, and the number of probes 331 in each probe row 33 is also 5. Of course, in other embodiments of the present application, the number of main grid lines 21 in the battery cell 20 and the number of solder pads 22 in each main grid line 21 can also be set to other values, and accordingly, the number of probe rows 33 and the number of probes 331 in each probe row 33 can also be set to other values, as long as the number of main grid lines 21 in the battery cell 20 is consistent with the number of probe rows 33, and the number of probes 331 in each probe row 33 is consistent with the number of solder pads 22 in each main grid line 21, and the present application will not elaborate on them one by one here.

[0042] Continue to refer Figure 1-Figure 3 In some optional embodiments, the carrier 10 and the probe row 33 are electrically connected to the positive and negative electrodes of an external power supply (not shown in the figure), and the negative electrode voltage of the external power supply is 10-15V. That is, the carrier 10 is electrically connected to the positive electrode of the external power supply, so that the positive electrode of the external power supply provides a forward voltage to the carrier 10. The carrier 10 is electrically connected to the negative electrode of the external power supply, and the negative electrode voltage of the external power supply is 10-15V, that is, the negative electrode of the external power supply provides a reverse voltage of 10-15V to the probe 331 in the probe row 33, so that the current on the main grid line 21 is 0.3-1A. At this time, a better ohmic contact effect can be achieved, and the value of the reverse voltage is small, which will not cause damage to the battery cell 20.

[0043] Figure 4 This is a partial structural diagram of a probe row provided by the present application, refer to Figure 1-Figure 4 In some optional embodiments, the probe row 33 includes a connecting bracket 332 and a probe 331, the two ends of the connecting bracket 332 are respectively connected to the two corresponding adjustment blocks 32, the probe 331 is located on the side of the connecting bracket 332 close to the battery cell 20, and the probe 331 is connected to the connecting bracket 332 through an elastic connecting member 40.

[0044] Specifically, the probe row 33 includes a connecting bracket 332 and a probe 331 connected to each other. The two ends of the connecting bracket 332 are respectively connected to the two corresponding adjustment blocks 32. The movement of the adjustment block 32 will drive the movement of the connecting bracket 332, thereby driving the movement of the probe 331. The probe 331 is located on the side of the connecting bracket 332 close to the battery cell 20. During laser sintering, the adjustment block 32 can drive the movement of the probe 331, so that the probe 331 is in contact with the pad point 22 on the corresponding main grid line 21. The probe 331 is connected to the connecting bracket 332 through an elastic connector 40. When the probe 331 is pressed down to contact the pad point 22 on the corresponding main grid line 21, the elastic connector 40 can play a rebound role, reducing the risk of damaging the battery cell 20 when the probe 331 is pressed down.

[0045] Continue to refer Figure 1-Figure 4 In some optional embodiments, the connecting bracket 332 includes a bracket body 3321 and a plurality of connecting seats 3322 connected to each other, the connecting seats 3322 are located on a side of the bracket body 3321 close to the battery cell 20, and a groove 3323 is provided on a side of the connecting seat 3322 away from the bracket body 3321;

[0046] In the same probe row 33, the probe 331 corresponds to the connection seat 3322 one by one, and one end of the probe 331 is located in the groove 3323 of the corresponding connection seat 3322 and connected to the bottom of the groove 3323, and the other end of the probe 331 is located outside the groove 3323 of the corresponding connection seat 3322.

[0047] Specifically, one end of the probe 331 is located in the groove 3323 of the corresponding connection seat 3322 and is connected to the bottom of the groove 3323, that is, the end of the probe 331 located in the groove 3323 of the corresponding connection seat 3322 is connected to the bottom of the groove 3323 through the elastic connector 40, so that when the probe 331 is pressed down to contact the pad point 22 on the corresponding main grid line 21, the elastic connector 40 can play a rebound role, reducing the risk of damage to the battery cell 20 caused by the probe 331 being pressed down. The other end of the probe 331 is located outside the groove 3323 of the corresponding connection seat 3322, so that the other end of the probe 331 can contact the pad point 22 on the corresponding main grid line 21.

[0048] At the same time, part of the probe 331 is located in the groove 3323, which can limit the moving path of the probe 331, thereby avoiding the risk of misalignment between the probe 331 and the corresponding pad point 22 on the main grid line 21 due to the tilt of the probe 331 when pressed down.

[0049] Continue to refer Figure 1-Figure 4In some optional embodiments, the height of the probe 331 along the direction perpendicular to the plane where the battery cell 20 is located is greater than the height of the groove 3323 along the direction perpendicular to the plane where the battery cell 20 is located.

[0050] Specifically, the height of the probe 331 in a direction perpendicular to the plane where the battery cell 20 is located is greater than the height of the groove 3323 in a direction perpendicular to the plane where the battery cell 20 is located, thereby preventing the probe 331 from being completely embedded in the groove 3323 of the corresponding connecting seat 3322, that is, the end of the probe 331 close to the battery cell 20 must be located outside the groove 3323 of the corresponding connecting seat 3322, so that the end of the probe 331 close to the battery cell 20 can be in contact with the pad point 22 on the corresponding main grid line 21.

[0051] Continue to refer Figure 1-Figure 4 In some optional embodiments, the elastic connecting member 3323 is a spring.

[0052] Specifically, the spring is a commonly used elastic component, and the elastic connecting member 3323 can be set as a spring, which is beneficial to reducing production costs.

[0053] What is needed is that, the present embodiment exemplarily shows that the elastic connecting member 3323 is a spring. In other embodiments of the present application, the elastic connecting member 3323 may also adopt other elastic components, which will not be described one by one in the present application.

[0054] Continue to refer Figure 1-Figure 4 In some optional embodiments, the laser-assisted sintering device further includes a laser device 50 , and the laser device 50 is located on a side of the probe row 33 away from the battery cell 20 .

[0055] Specifically, the laser-assisted sintering device also includes a laser device 50, which is located on the side of the probe row 33 away from the battery cell 20. The laser emitted by the laser device 50 scans the fine grid lines 23 on the battery cell 20 to achieve sintering of the fine grid lines 23 on the battery cell 20.

[0056] Optionally, during the laser sintering process, the laser power of the laser device 50 may be 15-30 W, the laser grating width may be 80-200 μm, and the laser marking speed may be 50-70 Kmm / s.

[0057] Continue to refer Figure 1-Figure 4 In some optional embodiments, the width of the probe row 33 along the first direction X is less than or equal to 0.2 mm, wherein the first direction X is perpendicular to the extension direction of the main grid line 21 and the first direction X is in the direction of the plane where the battery cell 20 is located.

[0058] Specifically, since the laser device 50 is located on the side of the probe row 33 away from the battery cell 20, the width of the probe row 33 along the first direction X is set to be less than or equal to 0.2 mm. The size of the probe row 33 is relatively small, which effectively reduces the shielding area of ​​the probe row 33 to the laser, thereby improving the sintering effect of the fine grid line 23 on the battery cell 20.

[0059] Optionally, the width of the probe row 33 along the first direction X can be set to 0.1-0.2 mm, so as to avoid the difficulty of setting the probe row 33 due to the width of the probe row 33 along the first direction X being too small, thereby effectively reducing production costs.

[0060] Continue to refer Figure 1-Figure 4 In some optional embodiments, the material of the probe row 33 is copper and its surface is plated with gold, so that the resistance value of the probe row 33 is small. While not affecting the current signal on the probe row 33, it is beneficial to reduce the setting size of the probe row 33, effectively reduce the shielding area of ​​the probe row 33 to the laser, and improve the sintering effect of the fine grid line 23 on the battery cell 20.

[0061] It can be seen from the above embodiments that the laser-assisted sintering device provided in the present application achieves at least the following beneficial effects:

[0062] In the laser-assisted sintering device provided by the present application, since the probe row corresponds to the main grid line one by one, the probe row includes a plurality of probes, and the main grid line includes a middle branch and two end branches, along the extension direction of the main grid line, the two end branches are respectively located at the two ends of the middle branch, and at least one pad point located in the middle branch and at least one pad point located in the two end branches correspond to the probes in the probe row corresponding thereto, so that during laser sintering, different probes in the probe row can be respectively contacted with at least one pad point located in the middle branch and at least one pad point located in the two end branches, so that a reverse voltage can be provided to at least one pad point located in the middle branch and at least one pad point located in the two end branches at the same time, so that in the main grid line, the current on the middle branch tends to be the same as the current on the end branch, effectively improving the ohmic contact effect in the middle area of ​​the battery cell, that is, effectively improving the overall ohmic contact effect. At the same time, there is no need to increase the voltage value of the reverse voltage provided to the probe in the probe row, so that the ohmic contact effect in the middle area of ​​the battery cell can be improved, thereby avoiding the damage of the battery cell caused by the excessively high voltage value of the reverse voltage, and effectively reducing the risk of battery cell damage.

[0063] Although some specific embodiments of the present application have been described in detail by way of example, it should be understood by those skilled in the art that the above examples are only for illustration, not for limiting the scope of the present application. It should be understood by those skilled in the art that the above embodiments may be modified without departing from the scope and spirit of the present application. The scope of the present application is defined by the appended claims.

Claims

1. A laser-assisted sintering device, characterized in that: include: A carrier, the carrier is used to carry a battery cell, the battery cell includes a plurality of main grid lines, and the main grid lines include a plurality of pad points; A pressurizing component, the pressurizing component comprising a bearing bracket, an adjusting block and a probe row, the bearing brackets are provided on both sides of the bearing platform along the extension direction of the main grid line, and the bearing brackets are located on the side of the battery cell away from the bearing platform, the adjusting block is movably connected to the bearing bracket, the number of the adjusting blocks connected to one bearing bracket is the same as the number of the main grid lines, the probe row and the adjusting blocks connected to the same bearing bracket correspond one to one, and the two ends of the probe row are respectively connected to the two adjusting blocks corresponding thereto; The probe row corresponds to the main grid line one by one, the probe row includes a plurality of probes, and the main grid line includes a middle branch and two end branches. Along the extension direction of the main grid line, the two end branches are respectively located at two ends of the middle branch, and at least one of the pad points located in the middle branch and at least one of the pad points located in the two end branches correspond to the probe in the corresponding probe row.

2. The laser-assisted sintering device according to claim 1, characterized in that: The probes in the probe row correspond to the pads in the corresponding main grid lines one by one.

3. The laser-assisted sintering device according to claim 1, characterized in that: The probe row includes a connecting bracket and the probes, the two ends of the connecting bracket are respectively connected to the two corresponding adjustment blocks, the probes are located on a side of the connecting bracket close to the battery cell, and the probes are connected to the connecting bracket via an elastic connector.

4. The laser-assisted sintering device according to claim 3, characterized in that: The connecting bracket comprises a bracket body and a plurality of connecting seats connected to each other, wherein the connecting seat is located on a side of the bracket body close to the battery sheet, and a groove is provided on a side of the connecting seat away from the bracket body; In the same probe row, the probes correspond to the connection seats one by one, and one end of the probe is located in the groove of the corresponding connection seat and connected to the bottom of the groove, and the other end of the probe is located outside the groove of the corresponding connection seat.

5. The laser-assisted sintering device according to claim 4, characterized in that: The height of the probe in a direction perpendicular to the plane where the battery cell is located is greater than the height of the groove in a direction perpendicular to the plane where the battery cell is located.

6. The laser-assisted sintering device according to claim 5, characterized in that: The elastic connecting member is a spring.

7. The laser-assisted sintering device according to claim 1, characterized in that: The width of the probe row along a first direction is less than or equal to 0.2 mm, wherein the first direction is perpendicular to the extension direction of the main grid line, and the first direction is in the direction of the plane where the battery cell is located.

8. The laser-assisted sintering device according to claim 7, characterized in that: The material of the probe row is copper, and the surface of the probe row is plated with gold.

9. The laser-assisted sintering device according to claim 1, characterized in that: The laser-assisted sintering device further comprises a laser device, and the laser device is located on a side of the probe row away from the battery sheet.

10. The laser-assisted sintering device according to claim 1, characterized in that: The carrier platform and the probe row are electrically connected to the positive and negative electrodes of an external power source respectively, and the negative electrode voltage of the external power source is 10-15V.

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