CN113601023B - Low-temperature nondestructive cutting device and method for battery piece - Google Patents
Low-temperature nondestructive cutting device and method for battery piece Download PDFInfo
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- CN113601023B CN113601023B CN202110851954.3A CN202110851954A CN113601023B CN 113601023 B CN113601023 B CN 113601023B CN 202110851954 A CN202110851954 A CN 202110851954A CN 113601023 B CN113601023 B CN 113601023B
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K26/00—Working by laser beam, e.g. welding, cutting or boring
- B23K26/36—Removing material
- B23K26/38—Removing material by boring or cutting
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K26/00—Working by laser beam, e.g. welding, cutting or boring
- B23K26/08—Devices involving relative movement between laser beam and workpiece
- B23K26/0869—Devices involving movement of the laser head in at least one axial direction
- B23K26/0876—Devices involving movement of the laser head in at least one axial direction in at least two axial directions
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K26/00—Working by laser beam, e.g. welding, cutting or boring
- B23K26/70—Auxiliary operations or equipment
- B23K26/702—Auxiliary equipment
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K26/00—Working by laser beam, e.g. welding, cutting or boring
- B23K26/70—Auxiliary operations or equipment
- B23K26/702—Auxiliary equipment
- B23K26/703—Cooling arrangements
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P70/00—Climate change mitigation technologies in the production process for final industrial or consumer products
- Y02P70/50—Manufacturing or production processes characterised by the final manufactured product
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- Optics & Photonics (AREA)
- Plasma & Fusion (AREA)
- Mechanical Engineering (AREA)
- Laser Beam Processing (AREA)
Abstract
The invention discloses a low-temperature nondestructive cutting device and method for a battery piece. The device comprises a laser cutting device and a material moving workbench; the material moving workbench comprises a bent material adsorption plate and a cutting driving mechanism. The cutting driving mechanism is used for driving the bent material adsorption plate to pass through the laser irradiation position of the laser cutting device. The bent material adsorption plate comprises an adsorption plate main body, a battery piece sucker and an upper arch support bar; the middle part of the adsorption plate main body is provided with an upper arch supporting bar. The length direction of the upper arch support bar is parallel to the conveying direction of the battery piece. One or more battery piece sucking discs with upward sucking openings are arranged on two sides of the upper arch supporting bar. The top edge of the upper arch support bar is higher than the cell slice sucker. According to the invention, the battery piece is bent into a slight arch shape before laser heating, so that the cutting of the battery piece is realized under the condition of reducing the laser power, the temperature required by laser cutting is reduced, and the damage to the battery piece in the cutting process is obviously reduced.
Description
Technical Field
The invention belongs to the technical field of battery piece cutting, and particularly relates to a low-temperature nondestructive cutting method and device for a battery piece.
Background
In the traditional laser cutting of the battery piece, a deep groove is formed in the battery piece, and then the battery piece is broken by a mechanical piece breaking device. The cutting form has three defects, namely, the high-peak-power pulse laser melts or gasifies the surface of the battery piece along the cutting line, so that the photoelectric conversion efficiency of the battery piece is reduced; the second disadvantage is that a large amount of dust is generated in the cutting process, when the workshop is filled with a large amount of dust, potential safety hazard exists, and explosion can be caused, so that each battery piece laser cutting device is required to be provided with a dust removing cabinet, and the assembly production workshop is also required to be provided with a corresponding dust removing device; the third disadvantage is that the laser cuts a groove with a depth of about 50% along the whole dividing line, which reduces the strength of the battery piece, and the subsequent mechanical breaking of the piece may further damage the battery piece.
The solar cell is mainly composed of silicon, and according to the characteristics of the silicon, the solar cell is rapidly heated and cooled at a certain temperature in a small range, so that internal stress can be generated in the silicon, and the solar cell can be cracked when the internal stress is large enough. The cutting form effectively solves the problem of the traditional cutting form, and has obvious advantages compared with the traditional form in the aspect of loss of the battery piece, so that the nondestructive cutting form in which laser and water spray simultaneously act on the battery piece is widely used. The cutting form has the defects that for part of battery pieces with special specifications, the laser power for cutting the battery pieces is higher, and the battery pieces are easily damaged due to the excessively high temperature during cutting; the second disadvantage is that a drying structure is added to dry the battery piece after water spray cooling. For this reason, a low-temperature nondestructive cutting scheme for the battery piece needs to be designed.
Disclosure of Invention
The invention aims to provide a low-temperature nondestructive cutting method and device for a battery piece. Comprises an adsorption plate main body, a slotting laser mechanism and a heating laser mechanism.
The invention relates to a low-temperature nondestructive cutting device for a battery piece, which comprises a laser cutting device and a material moving workbench; the material moving workbench is used for conveying the cut battery pieces; the laser cutting device is used for irradiating laser to the cut position of the battery piece. The material moving workbench comprises a bent material adsorption plate and a cutting driving mechanism. The cutting driving mechanism is used for driving the bent material adsorption plate to pass through the laser irradiation position of the laser cutting device. The bent material adsorption plate comprises an adsorption plate main body, a battery piece sucker and an upper arch support bar; the middle part of the adsorption plate main body is provided with an upper arch supporting bar. The length direction of the upper arch support bar is parallel to the conveying direction of the battery piece. One or more battery piece sucking discs with upward sucking openings are arranged on two sides of the upper arch supporting bar. The top edge of the upper arch support bar is higher than the cell slice sucker.
Preferably, two upper arch support bars are arranged on the top surface of the bent material adsorption plate at intervals. The gap between the two upper arch support bars corresponds to the cut position of the battery piece.
Preferably, a limit strip is arranged between the two upper arch support strips. The limiting strips are used for positioning the distance between the two upper arch support strips.
Preferably, the top surfaces of the upper arch support bars are all inclined outwards; the included angle between the top surface of the upper arch support bar and the horizontal plane is 0.75-1 degrees.
Preferably, the height difference between the top edge of the upper arch support bar and the suction opening of the cell suction disc is the upper arch height. The ratio of the width of the battery piece to the height of the upper arch is 110-140.
Preferably, two adsorption grooves are formed in the top surface of the adsorption plate body in a centered manner. Each battery piece sucking disc is installed in the sucking groove. The absorption mouth of battery piece sucking disc is parallel and level with the top surface of curved material absorption board. The middle part of adsorption plate main part top surface has seted up the preflex mounting groove. The upper arch support bar is arranged in the pre-bending installation groove.
Preferably, a supporting bar adjusting plate is arranged between the upper arch supporting bar and the adsorption plate main body. The supporting bar adjusting plate is connected with the adsorption plate main body. The position of the supporting bar adjusting plate can be adjusted perpendicular to the conveying direction of the battery piece.
Preferably, the material transferring workbench is provided with a cooling liquid recycling tank body. The cooling liquid recovery tank body is lower than the bent material adsorption plate and is used for receiving cooling liquid released in the laser heating process.
Preferably, the bent material adsorption plate and the cutting driving mechanism form a material moving unit. The material moving workbench comprises two material moving units which are arranged side by side. The cutting driving mechanism can drive the bent material adsorption plate to move transversely and vertically. The two material moving units can alternately convey the battery pieces to the laser cutting device. The positions of the upper arch support bars on the two material moving unit inner bent material adsorption plates correspond to each other, and the positions of the upper arch support bars can be irradiated by laser of the laser cutting device. One side of the adsorption plate main body is provided with a fixing part; the fixed part is used for installing the bent material adsorption plate on the cutting driving mechanism. The fixing parts on the two bent material adsorption plates are positioned at opposite sides.
Preferably, the cutting driving mechanism comprises a transverse moving driving assembly and a lifting driving assembly. The transverse moving driving assembly comprises a transverse moving bracket, a transverse moving rail, a sliding block, a synchronous wheel, a synchronous belt and a transverse moving driving motor. The transverse support is fixed on the frame. The two synchronizing wheels are supported at two ends of the transverse moving support and are connected through a synchronizing belt. The sideslip driving motor is installed on the sideslip support, and the output shaft passes through the reduction gear and is fixed with one of them synchronizing wheel. The transverse moving rail is fixed on the transverse moving bracket. The sliding block and the transverse moving rail form a sliding pair. The sliding block is fixed with the synchronous belt. The lifting driving assembly comprises a vertical track, a lifting sliding plate, a lifting screw rod and a lifting driving motor. The vertical rail is fixed on the slide block. The lifting slide plate and the vertical rail form a sliding pair. The vertically arranged lifting screw rod is supported on the vertical track and forms a screw pair with a nut on the lifting slide plate. The lifting driving motor is fixed on the vertical track, and the output shaft is connected with the lifting screw rod through gear transmission. The adsorption plate main body is fixed with the top of the lifting slide plate.
Preferably, the laser cutting device comprises a base, a slotting laser and a heating laser. The slotted laser with the downward output port and the heating laser are both arranged on the base and are arranged side by side along the conveying direction of the battery piece.
Preferably, the slotting laser and the heating laser respectively carry out position adjustment in the horizontal direction and the vertical direction through two-axis adjusting sliding tables.
Preferably, the laser cutting device further comprises an integral position adjusting sliding table. The integral position adjusting sliding table is arranged at the top of the base and comprises an adjusting guide rail, a laser mounting sliding plate, an adjusting motor and an adjusting screw rod. Two adjusting guide rails which are horizontally arranged and are mutually spaced are fixed on the base. The axial direction of the adjusting guide rail is perpendicular to the axial direction of the transverse moving track. The laser mounting sliding plate and the two adjusting guide rails form a sliding pair. The adjusting screw rod is supported at the top of the base and forms a screw pair with a nut at the bottom of the laser installation sliding plate. The adjusting motor is fixed at the top of the base, and the output shaft is fixed with one end of the adjusting screw rod. The slotting laser and the heating laser are arranged on the laser mounting sliding plate.
Preferably, the battery piece low-temperature nondestructive cutting device performs the following process of cutting the battery piece:
step one, dividing two ends of a material moving workbench into a feeding area and a discharging area. The feeding area is used for placing the uncut battery piece on the bent adsorption plate; the blanking area is used for taking down the cut battery piece from the bent material adsorption plate. The slotting laser is positioned between the heating laser and the feeding area. The cutting driving mechanisms in the two material moving units respectively convey the corresponding bent material adsorption plates to the feeding area and the discharging area, and the bent material adsorption plates in the feeding area are higher than those in the discharging area.
And secondly, placing the cut battery piece on a bent material adsorption plate of a feeding area. The suction force is generated by the suction of the battery piece sucking discs, so that two sides of the bottom surface of the battery piece are sucked by the battery piece sucking discs, the cut position of the battery piece is supported by the supporting force of the upper arch supporting bar, the battery piece forms an arch shape, and the cut position of the battery piece is subjected to the pre-applied bending moment.
Step three, a cutting driving mechanism in the two material moving units drives the corresponding bent material adsorption plates to reversely move, and the bent material adsorption plates in the material feeding area carry battery pieces to move below the slotting laser and the heating laser; the bent material adsorption plate of the blanking area moves towards the feeding area. When the bent material adsorption plate of the blanking area passes below the slotting laser and the heating laser, laser is blocked by the bent material adsorption plate of the loading area carrying the battery piece; therefore, the bent material adsorption plate returned to the feeding area from the discharging area cannot be irradiated by laser.
And step four, when the two ends of the battery piece carried by the bent material adsorption plate pass through the slotting laser, starting the slotting laser, and respectively forming fracture guide grooves at the two ends of the cut position of the battery piece. When the battery piece passes through the lower part of the heating laser, the cut position is heated, and the battery piece is bent into an arch shape and subjected to bending moment, so that the cut position is heated and then is broken along the breaking guide groove direction. After passing through the grooving laser and the heating laser completely, the battery piece is cut along the limit strips.
And fifthly, manually or automatically taking down the cut battery pieces after the bent material adsorption plate carrying the battery pieces reaches the blanking area. The bent material adsorption plate reaching the feeding area is driven by the corresponding cutting driving mechanism to rise in position; the bent material adsorption plate reaching the blanking area is driven by the corresponding cutting driving mechanism to lower.
A low-temperature nondestructive cutting method for a battery piece comprises the following specific steps:
and firstly, applying downward pressure to two sides of the battery piece, and applying upward supporting force to the cut position in the middle to enable the battery piece to be arched.
And secondly, grooving the two ends of the cut position of the battery piece by using a grooving laser. The cut position of the battery piece is heated using a heating laser. The battery piece is bent into an arch shape and is subjected to bending moment, so that the battery piece is heated at the cutting position and then is broken along the direction of the breaking guide groove.
Preferably, the groove depth of the slotting laser at two ends of the cut position of the battery piece is 8-40% of the thickness of the battery piece; the length of the fracture guide groove is 2-3mm.
Preferably, the operating power of the slotting laser is 40-60W, and the operating power of the heating laser is 150-165W.
Preferably, the cut position of the battery piece is heated to 140-200 ℃ under the heating of the heating laser.
The invention has the beneficial effects that:
1. according to the invention, the battery piece is bent into a slight arch shape before laser heating, so that the cutting of the battery piece is realized under the condition of reducing the laser power, the temperature required by laser cutting is reduced, and the damage to the battery piece in the cutting process is obviously reduced; specifically, when the laser cutting is carried out, the 300W heating laser can complete cutting by using 50% of power, the temperature of the battery piece only needs to reach about 150 ℃, and the damage to the battery piece is small; in the prior art, when the cutting is performed, the 300W heating laser needs 80% of power to complete the cutting, and the temperature of the battery piece only needs to be about 250 ℃, so that the battery piece is easily damaged seriously.
2. According to the invention, the requirement of laser cutting of the battery piece is reduced, and the bending moment is pre-applied to the battery piece to replace the internal stress of the battery piece, so that the battery piece can be cut without using cooling liquid.
3. The laser scribing depth only needs to be 10% of the thickness of the battery piece, so that the accurate cutting of the battery piece can be ensured, compared with the scribing depth of 50% in the traditional mode, the damage to the battery piece can be obviously reduced, the strength of the battery piece after cutting is improved, and dust generated during cutting is reduced.
Drawings
FIG. 1 is a schematic diagram of the overall structure of the present invention;
FIG. 2 is a schematic view of a transfer table according to the present invention;
FIG. 3 is a schematic view of a bent material adsorption plate according to the present invention;
fig. 4 is a schematic view of a laser cutting device according to the present invention.
Detailed Description
The invention is further described below with reference to the accompanying drawings.
As shown in fig. 1 and 2, a low-temperature nondestructive cutting device for a battery piece comprises a laser cutting device I and a material moving workbench II; the material moving workbench II is used for conveying the cut battery pieces; the laser cutting device I is used for carrying out laser grooving at two ends and integral laser heating on the battery piece. The material moving workbench II comprises a cooling liquid recycling tank body and two material moving units which are arranged side by side. The cooling liquid recovery tank body is arranged on the two material moving units and is used for receiving cooling liquid. The material moving unit comprises a cutting driving mechanism and a bent material adsorption plate. The bent material adsorption plate is arranged on the cutting driving mechanism. The cutting driving mechanism can drive the bent material adsorption plate to move transversely and vertically. The transverse movement is used for driving the bent material adsorption plate to pass through the lower part of the laser cutting device to realize the laser cutting of the battery piece, so that the transverse movement direction is the conveying direction of the battery piece. The vertical movement is used for enabling bent material adsorption plates in the two material moving units to be staggered in the vertical direction, so that interference between cutting and resetting of the two bent material adsorption plates is avoided. The two material moving units can alternately convey the battery piece to the laser cutting device I.
As shown in fig. 3, the bent material adsorption plate comprises an adsorption plate main body 1, a battery piece sucker 2, an upper arch support bar 3, a support bar adjusting plate 4 and a limit bar 5; two adsorption tanks 1-1 are centrally arranged on the top surface of the adsorption plate main body 1. The length direction of the adsorption groove 1-1 is parallel to the conveying direction of the battery piece (namely, the transverse moving direction of the bent material adsorption plate). A plurality of battery piece suckers 2 which are arranged at equal intervals in sequence are arranged in the two adsorption tanks 1-1. The absorption mouth of battery piece sucking disc 2 sets up, and with the top surface parallel and level of curved material absorption board. The middle part of the top surface of the adsorption plate main body 1 is provided with a pre-bending installation groove 1-2. Four kidney-shaped holes in rectangular arrangement are formed in the pre-bending mounting groove 1-2. The through holes on the four corners of the supporting bar adjusting plate 4 are respectively connected with the kidney-shaped holes on the pre-bending mounting groove 1-2 through bolts and nuts. The kidney-shaped holes enable the support bar adjustment plate 4 to perform position adjustment perpendicular to the conveying direction of the battery pieces.
The center position of the top surface of the adsorption plate main body 1 is fixed with a limit bar 5 through a bolt. The two sides of the limit bar 5 are both fixed with an upper arch support bar 3. The top surface of the limit bar 5 is lower than the top edge of the upper arch support bar 3. The axial direction of the upper arch support bar 3 is parallel to the transverse moving direction of the bent material adsorption plate. The top surfaces of the upper arch support bars 3 are all inclined outwards (the side far away from the limit bars 5); the included angle between the top surface of the upper arch support bar 3 and the horizontal plane is 0.75-1 deg. The top edge of the upper arch support bar 3 is higher than the top surface of the adsorption plate body 1. One side of the adsorption plate main body 1 is provided with a fixing part 1-3; the fixing part 1-3 is used for installing the bent material adsorption plate on the cutting driving mechanism. When the battery piece is placed on the adsorption plate main body 1 and is adsorbed by the battery piece sucker 2, two sides of the battery piece are attached to the top surface of the adsorption plate main body 1. The middle position of the battery piece is propped against the two upper arch support bars 3, so that the battery piece presents an upper arch shape, and the arch crown coincides with the cut position.
The height difference between the top edge of the upper arch support bar and the suction opening of the battery piece suction cup is the upper arch height; when the width of the battery piece is 210mm, the upper arch height is 1.5mm; when the width of the battery piece is 182mm, the height of the upper arch is 1.3mm. The ratio of the width of the battery piece to the height of the upper arch is 110:1-140:1. At a ratio of 140:1, the heating laser power required for the corresponding broken cell was 165W (55% of 300W), and at a ratio of 110:1, the heating laser power required for the corresponding broken cell was 150W (50% of 300W). The included angle of the top surface of the upper arch support bar 3 relative to the horizontal plane corresponds to the upper arch degree in the cutting process of the battery piece, so that the top surface of the upper arch support bar 3 can more fully provide support for the battery piece, and the battery piece is prevented from being only contacted by the line of the upper arch support bar 3.
The cutting driving mechanism comprises a transverse moving driving assembly and a lifting driving assembly. The transverse moving driving assembly comprises a transverse moving bracket 6, a transverse moving rail 7, a sliding block, a synchronous wheel, a synchronous belt 8 and a transverse moving driving motor 9. The traversing bracket 6 is fixed on the frame. Two synchronizing wheels are supported at two ends of the traversing bracket 6 and are connected through a synchronous belt 8. The traversing driving motor 9 is arranged on the traversing bracket 6, and the output shaft is fixed with one of the synchronous wheels through a speed reducer. The traversing rail 7 is fixed on the traversing bracket 6. The sliding block and the transverse moving rail 7 form a sliding pair. The slide block is fixed with the synchronous belt 8.
The lifting drive assembly comprises a vertical rail 10, a lifting slide plate 11, a lifting screw and a lifting drive motor 12. The vertical rail 10 is fixed on the slider. The lifting slide plate 11 and the vertical rail 10 form a sliding pair. The vertically arranged lifting screw is supported on the vertical rail 10 and forms a screw pair with a nut on the lifting slide plate 11. The lifting drive motor 12 is fixed on the vertical rail 10, and the output shaft is connected with the lifting screw rod through a gear transmission. The lifting slide plate 11 is driven to perform lifting adjustment by rotation of the lifting drive motor 12. The fixing part 1-3 on the adsorption plate main body 1 is fixed with the top of the lifting slide plate 11.
The limiting strips of the two material moving units and the material bending adsorption plates are positioned on the same vertical plane. The transverse moving rails 7 in the two material moving units are positioned on opposite sides of the two material moving units, so that the fixing parts 1-3 on the two bent material adsorption plates are positioned on opposite sides, and when the two bent material adsorption plates are staggered in the height direction, the relative movement does not interfere.
As shown in fig. 4, the laser cutting device i includes a base 18, an overall position adjustment slide 13, a slotted laser 14, a heating laser 15, a two-axis adjustment slide 19, a cooling water spray head 16, and a spray head position adjustment table 17. The base 18 is fixed to the frame. The integral position adjusting sliding table 13 is arranged at the top of the base 18 and comprises an adjusting guide rail, a laser mounting sliding plate, an adjusting motor and an adjusting screw rod. Two adjusting rails horizontally and spaced apart from each other are fixed to the base 18. The axial direction of the adjusting rail is perpendicular to the axial direction of the traversing rail 7. The laser mounting sliding plate and the two adjusting guide rails form a sliding pair. The adjusting screw is supported on the top of the base 18 and forms a screw pair with the nut at the bottom of the laser mounting slide. The adjusting motor is fixed at the top of the base 18, and the output shaft is fixed with one end of the adjusting screw.
The slotting laser 14 and the heating laser 15 are respectively arranged at the end part of the laser installation slide plate through a two-axis adjusting slide table 19. The laser output ports of the grooving laser 14 and the heating laser 15 are downward arranged and are positioned right above the material moving workbench II. The slotting laser 14 and the heating laser 15 are arranged side by side along the cell conveying direction. The two-axis adjusting sliding table 19 adopts an XZ two-axis manual micrometer sliding table, which belongs to the prior art and is not described in detail herein. The two adjusting directions of the two-axis adjusting sliding table 19 are respectively the horizontal direction and the vertical direction which are perpendicular to the conveying direction of the battery piece. Two-axis adjusting sliding tables 19 are used for adjusting the heights of the slotting laser 14 and the heating laser 15 and the cutting positions respectively.
The cooling water spray head 16 is installed at the lower side of the laser installation slide plate through a spray head position adjusting table 17 and faces to the right lower sides of the slotting laser 14 and the heating laser 15, and is used for spraying cooling water at slotting and heating positions. The position and orientation of the cooling water spray head 16 can be adjusted. Since the present invention bends the cut battery pieces into an arch shape, thereby significantly reducing the temperature required for heating, the present invention may not use cooling water, i.e., the cooling water spray head 16 is not an essential technical feature in the cutting process of the battery pieces.
The two ends of the material moving workbench II are respectively provided with a feeding area and a discharging area. The feeding area is used for placing the uncut battery piece on the bent adsorption plate; the blanking area is used for taking down the cut battery piece from the bent material adsorption plate. The slotting laser 14 is located between the heating laser 15 and the feeding zone.
The cutting method of the low-temperature nondestructive cutting device for the battery piece comprises the following specific steps:
step one, adjusting the positions of the support bar adjusting plates 4 on the two bent material absorbing plates to enable the limit bars 5 to be consistent with the cut positions (namely the center lines of the battery pieces) of the battery pieces; the positions of the slotting laser 14 and the heating laser 15 are respectively adjusted through the two-axis adjusting sliding tables 19, so that the slotting laser 14, the heating laser 15 and the cut positions of the battery piece are aligned, and the height reaches the preset requirement. The head position adjustment table 17 is adjusted so that the cooling water can be sprayed to the cut position of the battery piece. The cutting driving mechanisms in the two material moving units respectively convey the corresponding bent material adsorption plates to the feeding area and the discharging area, and the bent material adsorption plates in the feeding area are higher than those in the discharging area.
And secondly, grabbing the cut battery piece by a manipulator after the visual station of the feeding equipment is positioned, and placing the cut battery piece on a bent material adsorption plate of a feeding area. The suction is generated by the suction of the battery piece sucker 2, the cut battery piece is pressed by the mechanical arm of the feeding equipment, the two sides of the bottom surface of the battery piece are sucked by the battery piece suckers 2, the cut position of the battery piece is supported by the supporting force of the upper arch supporting bar 3, the battery piece forms an arch shape, and the cut position of the battery piece is subjected to a pre-applied bending moment.
Step three, cutting driving mechanisms in the two material moving units respectively drive corresponding bent material adsorption plates to reversely move, and the bent material adsorption plates in the material loading area carry battery pieces to move below the slotting laser 14 and the heating laser 15; the bent material adsorption plate of the blanking area moves towards the feeding area.
When the bent material adsorption plate of the blanking area passes under the slotting laser 14 and the heating laser 15, laser is blocked by the bent material adsorption plate of the loading area carrying the battery piece; therefore, the bent material adsorption plate returned to the feeding area from the discharging area cannot be irradiated by laser.
And step four, when the two ends of the battery piece carried by the bent material adsorption plate pass through the slotting laser 14, the slotting laser 14 is started, the working power is 50W (full power working), and fracture guide grooves are respectively formed at the two ends of the cut position of the battery piece. The depth of the fracture guide groove is 10% of the thickness of the battery piece; the length of the fracture guide groove is 2-3mm. I.e. each battery cell is activated twice by the slotting laser 14 during its passage under the slotting laser 14. The slotting laser 14 is turned off when the middle of the battery plate passes directly under the slotting laser 14.
When the heating laser 15 is continuously started and the working power is 150-165W (50% -55% of 300W), and the battery piece passes under the heating laser 15, the stability of the heated structure at the cut position is reduced, and the battery piece is bent into an arch shape and subjected to bending moment, so that the cut position is heated and then is broken along the direction of the breaking guide groove.
After passing completely through the slotting laser 14 and the heating laser 15, the battery pieces are cut along the limit bars 5.
And fifthly, after the bent material adsorption plate carrying the battery pieces reaches the blanking area, the blanking equipment takes down the cut battery pieces. The bent material adsorption plate reaching the feeding area is driven by a corresponding cutting driving mechanism to rise; the bent material adsorption plate reaching the blanking area is driven by the corresponding cutting driving mechanism to be lowered.
So far, the positions of the two bent material adsorption plates are exchanged, and the cutting operation of the battery piece can be continuously performed by repeating the steps two to five.
In the cutting process, the cooling water spray head 16 is started for the type of the battery piece which needs special cooling protection, and the laser heating position is cooled. Because the laser heating temperature is lower than the prior art, the invention does not need to turn on the cooling water spray head 16 in most cutting operations, thereby significantly reducing the cost.
Claims (14)
1. A low-temperature nondestructive cutting device for a battery piece comprises a laser cutting device and a material moving workbench; the method is characterized in that: the material moving workbench is used for conveying the cut battery pieces; the laser cutting device is used for carrying out laser irradiation on the cut position of the battery piece; the material moving workbench comprises a bent material adsorption plate and a cutting driving mechanism; the cutting driving mechanism is used for driving the bent material adsorption plate to pass through the laser irradiation position of the laser cutting device; the bent material adsorption plate comprises an adsorption plate main body (1), a battery piece sucker (2) and an upper arch support bar (3); an upper arch support bar (3) is arranged in the middle of the adsorption plate main body (1); the length direction of the upper arch support bar (3) is parallel to the conveying direction of the battery piece; the two sides of the upper arch support bar (3) are provided with one or more battery piece suckers (2) with upward absorption openings; the top edge of the upper arch support bar (3) is higher than the cell slice sucker (2);
two upper arch support bars (3) are arranged on the top surface of the bent material adsorption plate at intervals; the gap between the two upper arch support bars (3) corresponds to the cut position of the battery piece;
the top surfaces of the upper arch support bars (3) are all inclined outwards; the included angle between the top surface of the upper arch support bar (3) and the horizontal plane is 0.75-1 degree;
the height difference between the top edge of the upper arch support bar and the suction opening of the battery piece suction cup is the upper arch height; the ratio of the width of the battery piece to the height of the upper arch is 110-140.
2. The low-temperature nondestructive cutting device for battery pieces according to claim 1, wherein: a limit strip (5) is arranged between the two upper arch support strips (3); the limiting strips (5) are used for positioning the distance between the two upper arch support strips (3).
3. The low-temperature nondestructive cutting device for battery pieces according to claim 1 or 2, wherein: two adsorption grooves (1-1) are formed in the top surface of the adsorption plate main body (1) in a centering manner; each cell piece sucker (2) is arranged in the sucker groove (1-1); the adsorption port of the battery piece sucker (2) is flush with the top surface of the bent material adsorption plate; the middle part of the top surface of the adsorption plate main body (1) is provided with a pre-bending installation groove (1-2); the upper arch support bar (3) is arranged in the pre-bending installation groove (1-2).
4. The low-temperature nondestructive cutting device for battery pieces according to claim 1 or 2, wherein: a support bar adjusting plate (4) is arranged between the upper arch support bar (3) and the adsorption plate main body (1); the supporting bar adjusting plate (4) is connected with the adsorption plate main body (1); the position of the supporting bar adjusting plate (4) can be adjusted perpendicular to the conveying direction of the battery piece.
5. The low-temperature nondestructive cutting device for battery pieces according to claim 1 or 2, wherein: the material moving workbench is provided with a cooling liquid recovery tank body; the cooling liquid recovery tank body is lower than the bent material adsorption plate and is used for receiving cooling liquid released in the laser heating process.
6. The low-temperature nondestructive cutting device for battery pieces according to claim 1 or 2, wherein: the bent material adsorption plate and the cutting driving mechanism form a material moving unit; the material moving workbench comprises two material moving units which are arranged side by side; the cutting driving mechanism can drive the bent material adsorption plate to transversely move and vertically move; the two material moving units can alternately convey the battery pieces to the laser cutting device; the positions of the upper arch support bars (3) on the bent material adsorption plates in the two material moving units correspond to each other, and the positions can pass through the laser irradiation positions of the laser cutting device; one side of the adsorption plate main body (1) is provided with a fixing part (1-3); the fixing part (1-3) is used for installing the bent material adsorption plate on the cutting driving mechanism; the fixing parts (1-3) on the two bent material adsorption plates are positioned on opposite sides.
7. The low-temperature nondestructive cutting device for battery pieces according to claim 6, wherein: the cutting driving mechanism comprises a transverse moving driving assembly and a lifting driving assembly; the transverse moving driving assembly comprises a transverse moving bracket (6), a transverse moving rail (7), a sliding block, a synchronous wheel, a synchronous belt (8) and a transverse moving driving motor (9); the transverse moving bracket (6) is fixed on the frame; the two synchronizing wheels are supported at two ends of the transverse moving bracket (6) and are connected through a synchronizing belt (8); the transverse moving driving motor (9) is arranged on the transverse moving bracket (6), and the output shaft is fixed with one of the synchronous wheels through a speed reducer; the transverse moving rail (7) is fixed on the transverse moving bracket (6); the sliding block and the transverse moving rail (7) form a sliding pair; the sliding block is fixed with the synchronous belt (8); the lifting driving assembly comprises a vertical rail (10), a lifting sliding plate (11), a lifting screw rod and a lifting driving motor (12); the vertical rail (10) is fixed on the sliding block; the lifting slide plate (11) and the vertical rail (10) form a sliding pair; the vertically arranged lifting screw rod is supported on the vertical track (10) and forms a screw pair with a nut on the lifting slide plate (11); the lifting driving motor (12) is fixed on the vertical rail (10), and the output shaft is connected with the lifting screw rod through a gear transmission; the adsorption plate main body (1) is fixed with the top of the lifting slide plate (11).
8. The low-temperature nondestructive cutting device for battery pieces according to claim 6, wherein: the laser cutting device comprises a base (18), a slotting laser (14) and a heating laser (15); the slotted lasers (14) with downward output ports and the heating lasers (15) are all arranged on the base (18) and are arranged side by side along the conveying direction of the battery piece.
9. The low-temperature nondestructive cutting device for battery pieces according to claim 8, wherein: the slotting laser (14) and the heating laser (15) respectively carry out position adjustment in the horizontal direction and the vertical direction through a two-axis adjusting sliding table (19).
10. The low-temperature nondestructive cutting device for battery pieces according to claim 8, wherein: the laser cutting device also comprises an integral position adjusting sliding table (13); the integral position adjusting sliding table (13) is arranged at the top of the base (18) and comprises an adjusting guide rail, a laser mounting sliding plate, an adjusting motor and an adjusting screw rod; two adjusting guide rails which are horizontally arranged at intervals are fixed on the base (18); the axial direction of the adjusting guide rail is perpendicular to the axial direction of the transverse moving track (7); the laser mounting sliding plate and the two adjusting guide rails form a sliding pair; the adjusting screw rod is supported at the top of the base (18) and forms a screw pair with a nut at the bottom of the laser mounting slide plate; the adjusting motor is fixed at the top of the base (18), and the output shaft is fixed with one end of the adjusting screw rod; the slotting laser (14) and the heating laser (15) are arranged on the laser mounting slide plate.
11. The low-temperature nondestructive cutting device for battery pieces according to claim 8, wherein: the process of cutting the battery piece is as follows:
dividing two ends of a material moving workbench into a feeding area and a discharging area; the feeding area is used for placing the uncut battery piece on the bent adsorption plate; the blanking area is used for taking down the cut battery piece from the bent adsorption plate; the slotting laser (14) is positioned between the heating laser (15) and the feeding area; the cutting driving mechanisms in the two material moving units respectively convey the corresponding bent material adsorption plates to a feeding area and a discharging area, and the bent material adsorption plates in the feeding area are higher than the bent material adsorption plates in the discharging area;
step two, placing the cut battery piece on a bent material adsorption plate of a feeding area; the suction force is generated by the suction of the battery piece suction cups (2), so that two sides of the bottom surface of the battery piece are sucked by each battery piece suction cup (2), the cut position of the battery piece is supported by the support force of the upper arch support bar (3), the battery piece forms an arch shape, and the cut position of the battery piece is subjected to a pre-applied bending moment;
step three, a cutting driving mechanism in the two material moving units drives the corresponding bent material adsorption plates to reversely move, and the bent material adsorption plates in the material feeding area carry battery pieces to move below the slotting laser (14) and the heating laser (15); the bent material adsorption plate of the blanking area moves towards the feeding area; when the bent material adsorption plate of the blanking area passes under the slotting laser (14) and the heating laser (15), laser is blocked by the bent material adsorption plate of the charging area carrying the battery piece; so the bent material adsorption plate returned to the feeding area from the discharging area is not irradiated by laser;
step four, when two ends of a battery piece carried by the bent material adsorption plate pass through the slotting laser (14), the slotting laser (14) is started, and fracture guide grooves are respectively formed at two ends of a cut position of the battery piece; the heating laser (15) is continuously started, when the battery piece passes under the heating laser (15), the cut position is heated, and the battery piece is bent into an arch shape and subjected to bending moment, so that the cut position is heated and then is broken along the direction of the breaking guide groove; after passing through the slotting laser (14) and the heating laser (15), the battery piece is cut along the limit strip (5);
step five, manually or automatically taking down the cut battery pieces after the bent material adsorption plate carrying the battery pieces reaches a blanking area; the bent material adsorption plate reaching the feeding area is driven by a corresponding cutting driving mechanism to rise; the bent material adsorption plate reaching the blanking area is driven by the corresponding cutting driving mechanism to be lowered.
12. The low-temperature nondestructive cutting device for battery pieces according to claim 11, wherein: the depth of grooves formed at two ends of the cut position of the battery piece by the slotting laser is 8-40% of the thickness of the battery piece; the length of the fracture guide groove is 2-3mm.
13. The low-temperature nondestructive cutting device for battery pieces according to claim 11, wherein: the working power of the slotting laser is 40-60W, and the working power of the heating laser is 150-165W.
14. The low-temperature nondestructive cutting device for battery pieces according to claim 11, wherein: the cut position of the battery piece is heated to 140-200 ℃ under the heating of the heating laser.
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| CN202110851954.3A CN113601023B (en) | 2021-07-27 | 2021-07-27 | Low-temperature nondestructive cutting device and method for battery piece |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| JP2700136B2 (en) * | 1994-06-02 | 1998-01-19 | 双栄通商株式会社 | How to cut brittle materials |
| WO2007111398A1 (en) * | 2006-03-24 | 2007-10-04 | K-Eng Co., Ltd. | Glass cutting apparatus with bending member and method using thereof |
| JP5194076B2 (en) * | 2010-08-27 | 2013-05-08 | 三星ダイヤモンド工業株式会社 | Laser cleaving device |
| JP2012061681A (en) * | 2010-09-15 | 2012-03-29 | Mitsuboshi Diamond Industrial Co Ltd | Laser cleaving apparatus |
| JP2015160769A (en) * | 2014-02-27 | 2015-09-07 | 株式会社レミ | Method of cutting glass substrate |
| JP2015209357A (en) * | 2014-04-25 | 2015-11-24 | 三星ダイヤモンド工業株式会社 | Break method and break device |
| JP2017019704A (en) * | 2015-07-14 | 2017-01-26 | 中村留精密工業株式会社 | Method and apparatus for cutting hard fragile plate |
| CN211759265U (en) * | 2020-01-20 | 2020-10-27 | 帝尔激光科技(无锡)有限公司 | Laser cutting equipment applied to brittle material |
| CN211991429U (en) * | 2020-02-07 | 2020-11-24 | 宁夏小牛自动化设备有限公司 | Solar cell cutting equipment |
| CN111933746A (en) * | 2020-07-10 | 2020-11-13 | 深圳光远智能装备股份有限公司 | Nondestructive laser nondestructive scribing process for solar cell |
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Address after: 310051 floor 17, No. 258, Xihe Road, Xixing street, Binjiang District, Hangzhou City, Zhejiang Province Applicant after: HANGZHOU CONFIRMWARE TECHNOLOGY Co.,Ltd. Address before: 2 / F, building 2, no.9-1, binwen Road, Xixing street, Binjiang District, Hangzhou City, Zhejiang Province 310051 Applicant before: HANGZHOU CONFIRMWARE TECHNOLOGY Co.,Ltd. |
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