Laser-induced sintering device for BC battery

Abstract

The utility model provides a laser-induced sintering device for a BC battery. The laser-induced sintering device comprises a laser module, a bearing platform, a probe assembly and a power source. The bearing platform comprises an adsorption cavity, an adsorption part and an insulating plate, and the battery piece is adsorbed on the insulating plate; the probe assembly comprises a plurality of probes, the bearing platform is provided with a probe through hole penetrating up and down, and the probe through hole and the adsorption part are arranged in a staggered manner; when laser-induced sintering is conducted on the battery piece, the probe can penetrate through the probe via hole to make contact with the preset position of the battery piece, reverse voltage is applied to the battery piece through the power source, the laser module emits laser beams to enter the battery piece from the front face of the battery piece, the front face of the battery piece is prevented from being scratched, and high laser machining precision is achieved; and the upward total pressure F1 borne by the battery pieces is smaller than the downward total adsorption force F2 borne by the battery pieces, so that the battery pieces are prevented from being misplaced.

Description

Technical Field

[0001] The present application belongs to the technical field of crystalline silicon solar cells, and specifically, relates to a BC cell laser induced sintering device. Background Art

[0002] Laser-assisted induced sintering (LIF) technology requires pressing the probe on the metallized grid line of the cell, applying a reverse bias voltage and combining laser technology for processing. Conventional Topcon cells have metallized grid lines on both the front and back sides. The front side is the P-type area of ​​the cell, and the back side is the N-type area of ​​the cell. When performing the LIF process, the P-type area of ​​the cell needs to be connected to the negative pole of the power supply, and the N-type area needs to be connected to the positive pole of the power supply.

[0003] Usually, the battery cell to be processed is placed on a metal transfer platform so that the back of the battery cell contacts the metal transfer platform, the probe connected to the negative electrode of the power supply is pressed on the front main grid of the battery cell, and a section of the probe row connected to the positive electrode of the power supply is pressed on the metal transfer platform so that the N-type area of ​​the battery cell is connected to the positive electrode of the power supply, thereby applying a reverse bias voltage to the battery cell, and then the battery cell is laser scanned to complete the LIF process.

[0004] The LIF process for Topcon cells is relatively simple to implement. However, for BC cells, there is no metallized grid line on the front side. The metallized grid lines of BC cells are all set on the back side of the cell, and the P-type area and N-type area are staggered. The probe connected to the P-type area needs to be connected to the negative pole of the power supply, and the probe connected to the N-type area needs to be connected to the positive pole of the power supply, and the probe needs to be accurately pressed on the preset position on the back side of the cell (the preset position refers to the Figure 1 Otherwise, there is a risk that the probe will contact fine gates of different polarities near the preset position, causing a short circuit and affecting the LIF process.

[0005] In the prior art, the front side of the BC battery is placed on a transfer platform so that the front side of the battery cell contacts the transfer platform. The transfer platform is made of glass, and the laser beam needs to pass through the glass to enter the battery cell, which may cause refraction and deflection. In addition, during the transfer process, the front side of the battery cell contacts the transfer platform, which may mechanically scratch the velvet surface of the battery cell, affecting the electrical performance of the battery cell. Utility Model Content

[0006] In view of this, the present application provides a BC battery laser induced sintering device, in which the back of the battery cell contacts the supporting platform, the laser beam emitted by the laser module enters the battery cell from the front of the battery cell, and the probe is precisely aligned with the preset position of the battery cell.

[0007] A BC battery laser induced sintering device, comprising a laser module, a carrying platform, a probe assembly and a power supply;

[0008] The carrying platform comprises an adsorption cavity, an adsorption part and an insulating plate, wherein the adsorption part is arranged on the insulating plate, the adsorption part is communicated with the adsorption cavity, and the battery cell is adsorbed on the insulating plate through the adsorption part;

[0009] The probe assembly includes a plurality of probes, and the carrying platform is provided with probe vias which pass through the carrying platform from top to bottom corresponding to the probes, and the probe vias are staggered with the adsorption portion;

[0010] The laser module is located above the laser processing position. When the battery cell is subjected to laser induced sintering, the probe can pass through the probe via hole and contact the preset position of the battery cell adsorbed on the insulating plate, and one probe contacts one preset position. The positive pole of the power supply is connected to the probe connected to the N-type region of the battery cell, and the negative pole of the power supply is connected to the probe connected to the P-type region of the battery cell, so that a reverse voltage is applied to the battery cell, and the laser module emits a laser beam to incident on the battery cell from the front side of the battery cell.

[0011] Preferably, the total upward pressure F1 on the battery cell is smaller than the total downward adsorption force F2 on the battery cell; and / or,

[0012] The carrying platform comprises an adsorption bottom plate, the adsorption cavity is arranged inside the adsorption bottom plate, a first adsorption groove is opened on the upper surface of the adsorption bottom plate, the first adsorption groove is communicated with the adsorption cavity, and the insulating plate is arranged on the upper surface of the adsorption bottom plate;

[0013] The adsorption portion includes an adsorption hole and a second adsorption groove, the second adsorption groove is opened on the upper surface of the insulating plate, and the adsorption hole penetrates the insulating plate and is communicated with the first adsorption groove and the second adsorption groove respectively.

[0014] Preferably, one of the probe vias corresponds to one of the probe settings, so that each of the probes passes through the probe via corresponding to the setting and contacts the preset position;

[0015] The second adsorption groove is arranged around each of the probe via holes.

[0016] Preferably, the probe via is in the shape of an elongated strip, the second adsorption groove is an annular adsorption groove, the second adsorption groove surrounds the probe via, and a row of probes on the probe assembly all pass through the same probe via to contact each of the preset positions.

[0017] Preferably, the probe assembly is fixedly mounted on the bottom of the carrying platform.

[0018] Preferably, the probe assembly includes a probe row, a connecting member and a mounting member, the probes are mounted on the probe row, the probe row is mounted on the mounting member, the connecting member is fixedly mounted on the supporting platform, the mounting member is movably connected to the connecting member, and the mounting member can move up and down relative to the connecting member.

[0019] Preferably, the probe assembly further comprises a sliding bearing, and the mounting member and the connecting member are movably connected via the sliding bearing.

[0020] Preferably, it also includes a driving mechanism. When the carrying platform carrying the battery cell reaches the laser processing position and the battery cell is adsorbed on the insulating plate, the driving mechanism drives the mounting member to move upward relative to the connecting member, so that the probe passes through the probe via hole and contacts the battery cell.

[0021] Preferably, the driving mechanism comprises a DD turntable, a cam is provided at the laser processing position, and a cam push rod is installed at the bottom of the mounting member;

[0022] The probe assembly and the supporting platform are both fixedly mounted on the DD turntable. When the DD turntable rotates so that the probe assembly and the supporting platform reach the laser processing position, the cam push rod moves along the end surface of the cam from the bottom end of the cam to the top end of the cam, so that when the supporting platform reaches the laser processing position, the probe passes through the probe through hole and contacts the preset position.

[0023] Preferably, the insulating plate is made of ceramic with a flat surface.

[0024] The beneficial effects of this application are:

[0025] 1. The present application uses an adsorption part to adsorb the battery cell onto the insulating plate, and the probe passes through the probe via hole to precisely align with the preset position on the battery cell, and the total upward pressure on the battery cell is less than the total downward adsorption force on the battery cell, thereby preventing the battery cell from being misaligned and further improving the alignment accuracy;

[0026] 2. During the laser induced sintering process, the back of the cell contacts the carrying platform, which can prevent the front of the cell from being scratched and avoid EL scratches. The laser beam emitted by the laser module directly enters the cell from the front of the cell without passing through a medium such as glass. In addition, the insulating plate of the present application is made of ceramic with a flat surface, which can ensure the flatness of the cell during the processing and improve the laser processing accuracy.

[0027] 3. A second adsorption groove is provided around each probe via hole, so that when the probe contacts the preset position of the battery cell, the battery cell will not be misplaced and will not be broken, thus reducing the fragmentation rate;

[0028] 4. The probe assembly rotates with the bearing platform, and through the cooperation of the cam and the cam push rod, when the bearing platform reaches the laser processing position, each probe contacts each preset position, thereby improving the automation rhythm of the whole machine. After reaching the laser processing position, there is no need to correct the probe, which reduces the correction structure and optimizes the structure of the probe assembly. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] 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.

[0030] 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.

[0031] Figure 1 A schematic diagram of the location of the Pad point on the battery cell;

[0032] Figure 2 A diagram showing the positional relationship between a battery cell, a carrying platform and a probe assembly in one embodiment of the present application;

[0033] Figure 3 This is a schematic diagram of the structure of the carrier platform in this application;

[0034] Figure 4 A schematic diagram of the structure of the surface of an insulating board in one embodiment provided in the present application;

[0035] Figure 5 A diagram showing the positional relationship between a half-piece, a carrying platform and a probe assembly in another embodiment provided in the present application;

[0036] Figure 6 A schematic diagram of the structure of the surface of an insulating board in another embodiment provided in the present application;

[0037] Figure 7 is a position relationship diagram between the probe assembly and the carrying platform when the cam push rod is located at the bottom end of the cam;

[0038] Figure 8is a position relationship diagram between the probe assembly and the carrying platform when the cam push rod is located at the top end of the cam;

[0039] Fig. 9 Schematic diagram of the four-station turntable provided for this application.

[0040] In the figure: 1-battery cell; 11-Pad point; 12-half cell; 2-carrying platform; 21-insulating plate; 22-adsorption bottom plate; 23-adsorption hole; 24-second adsorption slot; 25-probe via; 3-probe assembly; 31-probe; 32-probe row; 33-connector; 34-mounting part; 35-sliding bearing; 36-cam push rod; 4-laser processing position; 5-cam; 6-laser module; 7-loading station; 8-visual camera station; 81-visual camera assembly; 9-correction station; 91-correction assembly. DETAILED DESCRIPTION

[0041] 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.

[0042] 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.

[0043] This application provides a BC battery laser induced sintering device, reference Figure 1-9 , including a laser module 6, a carrying platform 2, a probe assembly 3 and a power supply (not shown in the figure);

[0044] The carrying platform 2 includes an adsorption cavity (not shown in the figure), an adsorption portion and an insulating plate 21, wherein the adsorption portion is disposed on the insulating plate 21, the adsorption portion is communicated with the adsorption cavity, and the battery cell 1 is adsorbed on the insulating plate 21 through the adsorption portion;

[0045] The probe assembly 3 includes a plurality of probes 31, and the carrying platform 2 is provided with probe holes 25 that penetrate the carrying platform 2 vertically corresponding to the probes 31, and the probe holes 25 are staggered with the adsorption portion;

[0046] The laser module 6 is located above the laser processing position 4. When the battery cell 1 is subjected to laser induced sintering, the probe 31 can pass through the probe via 25 and contact the preset position of the battery cell 1 adsorbed on the insulating plate 21, and one probe 31 contacts one preset position. The positive pole of the power supply is connected to the probe 31 connected to the N-type region of the battery cell 1, and the negative pole of the power supply is connected to the probe 31 connected to the P-type region of the battery cell 1, so that a reverse voltage is applied to the battery cell 1, and the laser module 6 emits a laser beam from the front side of the battery cell 1 to enter the battery cell 1.

[0047] Furthermore, the total upward pressure F1 applied to the battery cell 1 is smaller than the total downward adsorption force F2 applied to the battery cell 1 .

[0048] like Fig. 9 As shown, initially, the battery cell 1 to be processed is placed on the carrying platform 2 at the loading station 7, and the battery cell 1 is adsorbed on the insulating plate 21 by the adsorption part, and then the carrying platform 2 carrying the battery cell 1 is transferred to the visual photography station 8, and the position of the battery cell 1 is photographed by the visual photography component 81, and then the carrying platform 2 is transferred to the correction station 9, and the position of the battery cell 1 is corrected by the correction component 91. After the position of the battery cell 1 is adjusted, the carrying platform 2 is transferred to the laser processing station 4, and the multiple probes 31 on the probe component 3 pass through the corresponding probe vias 25 and are precisely aligned and contacted with each preset position on the battery cell 1, and a reverse voltage is applied to the battery cell 1 through a power supply, and the laser module 6 located above the laser processing station 4 emits a laser beam from the front of the battery cell 1 directly into the battery cell 1, thereby performing laser induced sintering processing on the battery cell 1, and the laser beam does not need to pass through a medium such as glass to enter the battery cell 1.

[0049] The battery cell 1 is always adsorbed on the carrying platform 2 during the process of being transported to the laser processing position 4, which can prevent the battery cell 1 from being offset relative to the carrying platform 2 during the transportation process.

[0050] The preset position in this embodiment refers to the Pad point 11 and the main gate except the fine gate. Specifically, the probe 31 can contact the Pad point 11 or the main gate, as long as the probe 31 does not contact the fine gate when contacting the Pad point 11 or the main gate.

[0051] refer to Figure 2At the laser processing position 4, the battery cell 1 is located above the supporting platform 2 and is placed on the supporting platform 2, the probe assembly 3 is located below the supporting platform 2, and the laser module 6 is located above the battery cell 1, so that the laser beam emitted by the laser module 6 directly enters the battery cell 1 from the front side of the battery cell 1, and each probe 31 on the probe assembly 3 passes through the corresponding probe via 25 from bottom to top and contacts the battery cell 1 above the supporting platform 2.

[0052] During the processing, the total upward pressure F1 on the battery cell 1 is smaller than the total downward adsorption force F2 on the battery cell 1 , so that the battery cell 1 will not be misaligned when the probe 31 contacts the battery cell 1 .

[0053] In this embodiment, a vacuum generating device (not shown in the figure) is further provided, and the adsorption chamber is evacuated by the vacuum generating device, so that the adsorption part adsorbs the battery cell 1 onto the insulating plate 21 through negative pressure.

[0054] like Figure 3-6 As shown, the carrying platform 2 includes an adsorption bottom plate 22, the adsorption cavity is arranged inside the adsorption bottom plate 22, a first adsorption groove (not shown in the figure) is opened on the upper surface of the adsorption bottom plate 22, the first adsorption groove is communicated with the adsorption cavity, and the insulating plate 21 is arranged on the upper surface of the adsorption bottom plate 22;

[0055] The adsorption portion includes an adsorption hole 23 and a second adsorption groove 24 . The second adsorption groove 24 is opened on the upper surface of the insulating plate 21 . The adsorption hole 23 passes through the insulating plate 21 and is communicated with the first adsorption groove and the second adsorption groove 24 , respectively.

[0056] The insulating plate 21 used in this embodiment should have good insulation and high temperature resistance, and also needs to have high hardness, not wear the battery cells, and have good flatness, so that the battery cells will not be damaged during the laser induced sintering process when they are adsorbed on the insulating plate 21. Preferably, the insulating plate 21 is made of ceramic with a flat surface.

[0057] It can be understood that the second adsorption groove 24 is opened on the upper surface of the insulating plate 21, and the vacuum generating device evacuates the adsorption chamber to generate negative pressure in the adsorption chamber, and the negative pressure generated in the adsorption chamber is transmitted from the first adsorption groove to the second adsorption groove 24 through the adsorption hole 23, and the battery cell 1 is adsorbed on the insulating plate 21 through the second adsorption groove 24.

[0058] Of course, the insulating plate 21 and the adsorption bottom plate 22 of the present application can be an integrated design, that is, the entire supporting platform 2 is made of ceramic. In this case, only the second adsorption groove 24 can be set on the upper surface of the supporting platform 2, and the second adsorption groove 24 is directly connected to the adsorption chamber.

[0059] For the method of separately designing the insulating plate 21 and the adsorption bottom plate 22 in this embodiment, it can also be that the structures and shapes of the first adsorption groove and the second adsorption groove 24 are correspondingly arranged one by one, and the second adsorption groove 24 penetrates through the insulating plate 21 and is directly communicated with the corresponding first adsorption groove.

[0060] Generally, the inside of the probe 31 is a spring structure. When the probe 31 contacts a preset position, the spring contracts, and the reaction force of the spring in one probe 31 is f. When n probes 31 need to contact n preset positions on the battery cell 1 respectively, the total upward pressure F1 exerted by the n probes 31 on the battery cell 1 = n * f.

[0061] When the battery cell 1 is adsorbed on the insulating plate 21, the cross-sectional area of the second adsorption groove 24 is s, the adsorption vacuum value is p, and the total downward adsorption force F2 received by the battery cell 1 = p * s.

[0062] When designing the insulating plate 21, it should be designed under the condition of F1 < F2.

[0063] In one of the implementation manners, referring to Figure 4 , one of the probe through holes 25 corresponds to one of the probes 31, so that each of the probes 31 passes through the corresponding probe through hole 25 and contacts the preset position;

[0064] The second adsorption groove 24 is provided around each of the probe through holes 25.

[0065] This form of staggered distribution of the probe through holes 25 and the second adsorption grooves 24 can prevent the position of the battery cell 1 from shifting during the processing and avoid the fragmentation of the battery cell 1.

[0066] In this implementation manner, it is necessary to design the carrying platform 2 according to the pattern of the preset positions on the battery cell 1 and design the positions of the probes 31 on the probe assembly 3, so that each of the probes 31 can pass through the corresponding probe through hole 25 and accurately contact the corresponding Pad point. When the pattern of the preset positions on the battery cell 1 changes, the designs of the corresponding carrying platform 2 and probe assembly 3 also need to change accordingly.

[0067] The above method is preferably applicable to the full - area probe 31 pressing and preset - position processing technology, that is, each preset position on the battery cell 1 contacts a probe 31 for processing.

[0068] In another implementation manner, referring to Figure 5-6, the probe via hole 25 is in a long strip shape, the second adsorption groove 24 is an annular adsorption groove, the second adsorption groove 24 surrounds the periphery of the probe via hole 25, and a row of probes 31 on the probe assembly 3 all pass through the same probe via hole 25 to contact each of the preset positions.

[0069] Generally, a battery cell 1 includes two half cells 12. When it is necessary for each probe 31 to contact a row of preset positions in each half cell 12, two long strip-shaped probe via holes 25 can be opened on the carrier platform 2. One probe via hole 25 is arranged corresponding to a row of preset positions on one half cell 12, and the other probe via hole 25 is arranged corresponding to a row of preset positions on the other half cell 12. Correspondingly, the probe assembly 3 includes two rows of probes 31. The size of each probe via hole 25 should enable a row of probes 31 to pass through the same probe via hole 25, and then an annular second adsorption groove 24 is arranged around each probe via hole 25. Similarly, the condition of F1 < F2 should be satisfied, so that the battery cell 1 can be ensured not to be misaligned and the battery cell 1 will not be fragmented during the processing.

[0070] This method can be compatible with the preset position patterns on different battery cells 1. When the preset position pattern on the battery cell 1 changes, it is not necessary to replace the carrier platform 2, and only the probe assembly 3 needs to be redesigned.

[0071] Of course, this implementation method can also be used for pressing multiple rows of preset positions in each half cell 12, or for the full-surface probe 31 pressing preset position processing technology.

[0072] Such as Figure 7-8 As shown, the probe assembly 3 is fixedly installed at the bottom of the carrier platform 2, so that the probe assembly 3 moves along with the carrier platform 2. When the carrier platform 2 reaches the laser processing position 4, the position between the alignment probe assembly 3 and the carrier platform 2 can be omitted, and before reaching the laser processing position 4, the battery cell 1 has been corrected at the alignment station 9, so that after reaching the laser processing position 4, it is no longer necessary to correct the positions of the probes 31, improving the processing accuracy of the whole process. And the movement of the probe assembly 3 following the carrier platform 2 can reduce the probe travel and improve the production capacity.

[0073] The probe assembly 3 includes a probe row 32, a connecting piece 33 and a mounting piece 34. The probe 31 is mounted on the probe row 32, the probe row 32 is mounted on the mounting piece 34, the connecting piece 33 is fixedly installed on the carrier platform 2, the mounting piece 34 is movably connected to the connecting piece 33, and the mounting piece 34 can move up and down relative to the connecting piece 33. Specifically, the probe assembly 3 further includes a sliding bearing 35, and the mounting piece 34 and the connecting piece 33 are movably connected through the sliding bearing 35.

[0074] The component that enables the movable connection between the mounting member 34 and the connecting member 33 is not limited to the sliding bearing 35, but may also be other components that can achieve the movable connection between the mounting member 34 and the connecting member 33, and the mounting member 34 can move up and down relative to the connecting member 33, such as slider rails, guide rod linear bearings and other components.

[0075] Furthermore, it also includes a driving mechanism. When the carrying platform 2 carrying the battery cell 1 reaches the laser processing position 4 and the battery cell 1 is adsorbed on the insulating plate 21, the driving mechanism drives the mounting member 34 to move upward relative to the connecting member 33, so that the probe 31 passes through the probe via 25 and contacts the battery cell 1.

[0076] Preferably, the driving mechanism includes a DD turntable (not shown in the figure), a cam 5 is provided at the laser processing position 4, and a cam push rod 36 is installed at the bottom of the mounting member 34;

[0077] The probe assembly 3 and the supporting platform 2 are both fixedly mounted on the DD turntable. When the DD turntable rotates so that the probe assembly 3 and the supporting platform 2 reach the laser processing position 4, the cam push rod 36 moves along the end surface 51 of the cam 5 from the bottom end of the cam 5 to the top end of the cam 5, so that when the supporting platform 2 reaches the laser processing position 4, the probe 31 passes through the probe through hole 25 and contacts the preset position.

[0078] The DD turntable rotates so that the probe assembly 3 and the carrying platform 2 thereon pass through the loading station 7, the visual photography station 8, and the deviation correction station 9 in turn to reach the laser processing station 4, and when reaching the laser processing station 4, the mounting member 34 moves upward synchronously, so that each probe 31 passes through the probe via 25 and contacts each preset position on the battery cell 1. At this time, the laser beam emitted by the laser module 6 can just scan along the laser processing area on the battery cell 1. The whole process does not need to correct the position of the probe 31 and the laser module 6, only the battery cell 1 needs to be corrected in advance, which effectively improves the processing accuracy and the automation rhythm of the whole machine.

[0079] like Figure 7-8As shown, the DD turntable leaves the deviation correction station 9 but has not yet reached the laser processing station 4. In the process of reaching the laser processing station 4, the DD turntable rotates, and the cam push rod 36 moves from the bottom end to the top end of the cam along the end face 51 of the cam 5, driving the mounting member 34 to gradually move upward relative to the connecting member 33. When the cam push rod 36 just reaches the top end of the cam 5, the support platform 2 is just located at the laser processing station 4, and the laser module 6 can scan along the laser processing area of ​​the battery cell 1 when working, and at the same time, each probe 31 on the probe row 32 extends from the probe via 25 to contact the preset position on the battery cell 1. This synchronous movement method can effectively improve the automation rhythm of the whole machine.

[0080] 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.

[0081] It should be noted that in the description of the present application, it should be understood that the terms "upper", "lower", "top", "bottom", "inside", "outside" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the drawings, which are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present application. When a component is considered to be "connected" to another component, it may be directly connected to the other component or there may be a centrally arranged component at the same time.

[0082] It should also be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "comprises", "comprising" or any other variants thereof are intended to cover non-exclusive inclusion, so that an article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such article or device. In the absence of further restrictions, the elements defined by the sentence "comprising a ..." do not exclude the existence of other identical elements in the article or device including the above elements.

[0083] 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 BC battery laser induced sintering device, characterized in that: It comprises a laser module (6), a carrying platform (2), a probe assembly (3) and a power source; The carrying platform (2) comprises an adsorption cavity, an adsorption portion and an insulating plate (21), wherein the adsorption portion is arranged on the insulating plate (21), the adsorption portion is communicated with the adsorption cavity, and the battery cell (1) is adsorbed on the insulating plate (21) through the adsorption portion; The probe assembly (3) comprises a plurality of probes (31); the carrying platform (2) is provided with probe vias (25) which pass through the carrying platform (2) from top to bottom, corresponding to the probes (31); the probe vias (25) are staggered with the adsorption portion; The laser module (6) is located above the laser processing position (4). When the battery cell (1) is subjected to laser induced sintering, the probe (31) can pass through the probe via hole (25) and contact a preset position of the battery cell (1) adsorbed on the insulating plate (21), and one probe (31) contacts one preset position. The positive pole of the power supply is connected to the probe (31) connected to the N-type region of the battery cell (1), and the negative pole of the power supply is connected to the probe (31) connected to the P-type region of the battery cell (1), so that a reverse voltage is applied to the battery cell (1). The laser module (6) emits a laser beam from the front side of the battery cell (1) to impinge on the battery cell (1).

2. A BC battery laser induced sintering device according to claim 1, characterized in that: The total upward pressure F1 on the battery cell (1) is smaller than the total downward adsorption force F2 on the battery cell (1); and / or, The carrying platform (2) comprises an adsorption bottom plate (22), the adsorption chamber is arranged inside the adsorption bottom plate (22), a first adsorption groove is opened on the upper surface of the adsorption bottom plate (22), the first adsorption groove is communicated with the adsorption chamber, and the insulating plate (21) is arranged on the upper surface of the adsorption bottom plate (22); The adsorption portion comprises an adsorption hole (23) and a second adsorption groove (24); the second adsorption groove (24) is disposed on the upper surface of the insulating plate (21); the adsorption hole (23) penetrates the insulating plate (21) and is respectively connected to the first adsorption groove and the second adsorption groove (24).

3. A BC battery laser induced sintering device according to claim 2, characterized in that: One of the probe via holes (25) is arranged corresponding to one of the probes (31), so that each of the probes (31) passes through the probe via hole (25) arranged corresponding to it and contacts the preset position; The second adsorption groove (24) is provided around each of the probe through holes (25).

4. A BC battery laser induced sintering device according to claim 2, characterized in that: The probe via (25) is in the shape of a long strip, the second adsorption groove (24) is an annular adsorption groove, the second adsorption groove (24) surrounds the probe via (25), and a row of probes (31) on the probe assembly (3) all pass through the same probe via (25) and contact each of the preset positions.

5. A BC battery laser induced sintering device according to any one of claims 1-4, characterized in that: The probe assembly (3) is fixedly mounted on the bottom of the carrying platform (2).

6. A BC battery laser induced sintering device according to claim 5, characterized in that: The probe assembly (3) comprises a probe row (32), a connecting member (33) and a mounting member (34); the probe (31) is mounted on the probe row (32); the probe row (32) is mounted on the mounting member (34); the connecting member (33) is fixedly mounted on the supporting platform (2); the mounting member (34) is movably connected to the connecting member (33); and the mounting member (34) can move up and down relative to the connecting member (33).

7. A BC battery laser induced sintering device according to claim 6, characterized in that: The probe assembly (3) further comprises a sliding bearing (35), and the mounting member (34) and the connecting member (33) are movably connected via the sliding bearing (35).

8. A BC battery laser induced sintering device according to claim 7, characterized in that: It also includes a driving mechanism, and when the carrying platform (2) carrying the battery cell (1) reaches the laser processing position (4), and the battery cell (1) is adsorbed on the insulating plate (21), the driving mechanism drives the mounting member (34) to move upward relative to the connecting member (33), so that the probe (31) passes through the probe via hole (25) and contacts the battery cell (1).

9. A BC battery laser induced sintering device according to claim 8, characterized in that: The driving mechanism comprises a DD turntable, a cam (5) is provided at the laser processing position (4), and a cam push rod (36) is installed at the bottom of the mounting member (34); The probe assembly (3) and the supporting platform (2) are both fixedly mounted on the DD turntable. When the DD turntable rotates so that the probe assembly (3) and the supporting platform (2) reach the laser processing position (4), the cam push rod (36) moves along the end surface (51) of the cam (5) from the bottom end of the cam (5) to the top end of the cam (5), so that when the supporting platform (2) reaches the laser processing position (4), the probe (31) passes through the probe through hole (25) and contacts the preset position.

10. A BC battery laser induced sintering device according to any one of claims 1-4, characterized in that: The insulating plate (21) is made of ceramic with a flat surface.

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