CN112935586A - One-to-two grooving laser head and one-to-three grooving method for battery piece - Google Patents

One-to-two grooving laser head and one-to-three grooving method for battery piece Download PDF

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Publication number
CN112935586A
CN112935586A CN202110299867.1A CN202110299867A CN112935586A CN 112935586 A CN112935586 A CN 112935586A CN 202110299867 A CN202110299867 A CN 202110299867A CN 112935586 A CN112935586 A CN 112935586A
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China
Prior art keywords
laser
laser head
grooving
battery piece
head
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Granted
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CN202110299867.1A
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Chinese (zh)
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CN112935586B (en
Inventor
仇毅
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Jiangsu Chuangyuan Electron Co Ltd
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Jiangsu Chuangyuan Electron Co Ltd
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Priority to CN202110437636.2A priority Critical patent/CN113084368B/en
Priority to CN202110299867.1A priority patent/CN112935586B/en
Publication of CN112935586A publication Critical patent/CN112935586A/en
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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
    • B23K26/02—Positioning or observing the workpiece, e.g. with respect to the point of impact; Aligning, aiming or focusing the laser beam
    • B23K26/04—Automatically aligning, aiming or focusing the laser beam, e.g. using the back-scattered light
    • B23K26/046—Automatically focusing the laser beam
    • 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
    • B23K26/02—Positioning or observing the workpiece, e.g. with respect to the point of impact; Aligning, aiming or focusing the laser beam
    • B23K26/06—Shaping the laser beam, e.g. by masks or multi-focusing
    • B23K26/064—Shaping the laser beam, e.g. by masks or multi-focusing by means of optical elements, e.g. lenses, mirrors or prisms
    • B23K26/0643—Shaping the laser beam, e.g. by masks or multi-focusing by means of optical elements, e.g. lenses, mirrors or prisms comprising mirrors
    • 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
    • B23K2101/00—Articles made by soldering, welding or cutting
    • B23K2101/36—Electric or electronic devices
    • 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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  • Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Engineering & Computer Science (AREA)
  • Plasma & Fusion (AREA)
  • Mechanical Engineering (AREA)
  • Laser Beam Processing (AREA)

Abstract

The invention discloses a one-to-two grooving laser head and a one-to-one and three-grooving method for battery pieces, and belongs to the technical field of photovoltaic laser cutting. The utility model provides a one drags two fluting laser heads, includes bottom plate, laser input adds the light gate, first laser cutting module and second laser cutting module, and laser input adds the light gate and sets up on the bottom plate, and laser input adds the external laser input device of light gate, and laser input adds the light gate and includes deflection mechanism, and deflection mechanism can reflect laser light path in order to change the light path direction to it communicates with each other with two laser cutting module difference light paths to realize a laser input device. The one-driving-two grooving laser head and the one-to-three grooving method for the battery piece can realize that one laser input device is connected with two laser heads to perform laser grooving work, reduce the cost investment and effectively improve the working efficiency.

Description

One-to-two grooving laser head and one-to-three grooving method for battery piece
Technical Field
The invention relates to the technical field of photovoltaic laser cutting, in particular to a one-to-two grooving laser head and a one-to-three grooving method for battery pieces.
Background
With the continuous progress of photovoltaic technology, the application of solar energy technology is more and more extensive, wherein in the production process of the most common solar cell panel, the solar cell panel needs to be cut by laser.
However, in the prior art, only one laser head can be installed on one laser input device, and the productivity is low under the condition that the battery piece needs to be divided into three parts; and if increase laser input device then can increase cost greatly and consume, adopt the beam splitter to realize that two laser heads of a laser input device installation simultaneously, but the beam splitter is too big to the loss of laser, and influence to the product is not negligible.
Disclosure of Invention
The invention aims to provide a one-driving-two grooving laser head and a one-by-one grooving method for a battery piece, so that one laser input device is connected with two laser heads to perform one-by-three grooving treatment on the battery piece.
In order to achieve the technical purpose, the technical scheme of the embodiment of the invention is as follows:
a one-to-two slotted laser head comprises a bottom plate, a laser input light adding gate, a first laser cutting module and a second laser cutting module, wherein the laser input light adding gate is arranged on the bottom plate and is externally connected with a laser input device; the first laser cutting module comprises a first laser head, the first laser head is connected with a first reflection assembly, and when the deflection mirror slides to a first position, the first laser head is communicated with a laser input device through the first reflection assembly; the second laser cutting module comprises a second laser head, the second laser head is connected with the reflecting module, and when the deflection mirror slides to the second position, the second laser head is communicated with the laser input device through the reflecting module to realize the light path.
Furthermore, the first reflection assembly comprises a first mounting block and a first reflector, the first reflector is fixed on the first mounting block, and the lower end of the first mounting block is connected with the first laser head; the first surface of the first mounting block is defined to fix the first reflector, the second surface of the first mounting block is defined to be opposite to the deflection mechanism, the third surface of the first mounting block is defined to be connected with the first laser head, holes are formed in the first surface, the second surface and the third surface, and the holes in the first surface are communicated with the holes in the second surface and the third surface respectively in a penetrating mode.
Furthermore, the first laser cutting module further comprises a first fine adjustment sliding table, the first fine adjustment sliding table is arranged on the bottom plate, and the sliding end of the first fine adjustment sliding table is connected with the first installation block.
Furthermore, the reflection module further comprises a second reflection assembly and a third reflection assembly, the second reflection assembly comprises a second mounting block and a second reflector, the third reflection assembly comprises a third mounting block and a third reflector, and the second reflection assembly and the third reflection assembly are both the same as the first reflection assembly in structure; the second mounting block is fixedly connected with the second laser head, and the third mounting block is arranged on the second mounting block.
Furthermore, the second reflector is arranged in parallel with the first reflector, and the third reflector is arranged in parallel with the deflection mirror.
Furthermore, the reflection module further comprises a second fine adjustment sliding table, the second fine adjustment sliding table is arranged on the bottom plate, and the sliding end of the second fine adjustment sliding table is connected with the second installation block.
Furthermore, a hood is arranged on the bottom plate and is of a light-tight closed structure.
Further, first laser head includes beam expanding lens and focusing mirror, and the beam expanding lens upper end is fixed in first installation piece, and focusing mirror is connected to the beam expanding lens lower extreme.
A method for dividing a battery piece into three slots comprises the one-driving-two slot laser head, and comprises the following steps:
s1, arranging the first laser head and the second laser head to be vertical to the battery piece, and respectively adjusting the vertical distance between the first laser head and the battery piece and the distance between the second laser head and the battery piece to be a set value; arranging the battery piece outside the laser range of the first laser head and the second laser head to move towards the first laser head;
s2, starting an external laser input device, moving a deflection mirror to a first position when a first edge of the battery piece moves to a position opposite to a first laser head, and slotting the first slotting position of the battery piece by the first laser head; after the slotting is finished, when the first edge of the battery piece is moved to the position opposite to the second laser head, the deflection mirror is moved to the second position, the second laser head slots a second slot of the battery piece, and after the slotting at the second slot is finished, the laser input device is closed and the deflection mirror is reset;
s3, when the second edge of the battery piece moves to the position opposite to the first laser head, starting the laser input device, moving the deflection mirror to the first position, and slotting the third slot of the battery piece by the first laser head; and when the second edge of the battery piece is moved to the position opposite to the second laser head, the deflection mirror is moved to the second position, and the second laser head slots the fourth slot of the battery piece.
In S1, before the grooving, the first laser head and the second laser head are arranged in a staggered mode in the moving direction of the battery piece, and the first laser head is located between the second laser head and the battery piece.
Compared with the prior art, the invention has the advantages that:
1. the invention can realize laser grooving work of two laser heads, and effectively improve the working efficiency when the battery piece is cut by one in three.
2. In the invention, only one external laser input device is connected with two laser heads for working, thereby greatly reducing the cost investment.
3. The invention discloses a method for slotting a cell piece by three by alternately working two laser heads by adopting a sliding design of a deflection mirror, and effectively reduces the loss of laser compared with the method for slotting the cell piece by three by using a beam splitter.
Drawings
The present invention will be described in further detail with reference to the accompanying drawings and specific embodiments.
Fig. 1 is a schematic structural diagram of a laser head with two slots in one embodiment of the present invention.
Fig. 2 is a schematic diagram of an internal structure of a laser head with two slots.
Fig. 3 is a schematic cross-sectional view of a deflection mechanism in an embodiment of the present invention.
Fig. 4 is an installation diagram of the first laser cutting module according to the embodiment of the invention.
Fig. 5 is a schematic structural diagram of a first mounting block at an angle in the embodiment of the present invention.
Fig. 6 is a schematic structural diagram of the first mounting block at another angle in the embodiment of the present invention.
Fig. 7 is a schematic structural diagram of a second laser cutting module according to an embodiment of the invention.
Fig. 8 is a schematic structural view of a first laser head in an embodiment of the present invention.
Fig. 9 is a schematic structural diagram of a battery piece after slotting in the embodiment of the invention.
Wherein the reference numerals are as follows:
10-a base plate; 11-laser input plus optical shutter; 111-a deflection mechanism; 1111-deflection mirror; 1112-fixing block; 1112 a-an arc-shaped slot; 1113-driving source; 112-laser input connector; 113-a scaffold;
12-a first laser cutting module; 121-a first laser head; 1211-beam expander; 1212-focusing mirror; 122 — a first reflective component; 1221-a first mounting block; 1221 a-a first surface; 1221 b-a second surface; 1221 c-a third surface; 1222-a first mirror; 1223-holes; 123-a first fine tuning slide table;
13-a second laser cutting module; 131-a second laser head; 132-a reflective module; 1321-a second reflective component; 1324-a third reflective component; 1322-a second mounting block; 1323-a second mirror; 1325-a third mounting block; 1326-a third mirror; 1327-a second fine tuning ramp; 1328-connector; 14-hood.
20-a battery piece; 20 a-cell first edge; 20 b-cell second edge; 20 c-a first groove of the battery piece; 20 d-second groove of the battery piece; 20 e-a third groove of the cell; and 20f, namely the fourth groove of the battery piece.
Detailed Description
The invention is described in detail below with reference to the drawings and the detailed description.
It will be understood that when an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. When an element is referred to as being "on" or "disposed of" another element, it can be directly connected to the other element or intervening elements may also be present. When an element is referred to as being "secured to" another element, it can be directly connected to the other element or intervening elements may also be present. The terms "front", "back", "left", "right" and similar expressions are used herein for the purpose of illustration only.
Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used in the description of the present application herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the application.
Referring to fig. 2 to 4, a one-driving-two slotted laser head includes a bottom plate 10, a laser input light adding shutter 11, a first laser cutting module 12 and a second laser cutting module 13, where the laser input light adding shutter 11 is disposed on the bottom plate 10, the laser input light adding shutter 11 is externally connected to a laser input device, the laser input light adding shutter 11 includes a deflection mechanism 111, the deflection mechanism 111 includes a deflection mirror 1111 and a fixed block 1112, the deflection mirror 1111 is slidably disposed in the fixed block 1112, and the deflection mirror 1111 forms a certain angle with a laser light path input by the laser input device; the first laser cutting module 12 comprises a first laser head 121, the first laser head 121 is connected with a first reflection assembly 122, and when the deflection mirror 1111 slides to a first position, the first laser head 121 is communicated with a laser input device through the first reflection assembly 122; the second laser cutting module 13 comprises a second laser head 131, the second laser head 131 is connected with the reflection module 132, and when the deflection mirror 1111 slides to the second position, the second laser head 131 is communicated with the laser input device through the reflection module 132.
The deflecting mirror 1111 is disposed at an angle to the optical path of the laser light inputted by the laser input device to reflect the laser light so that the laser light is incident into the reflecting module 132.
The sliding arrangement of the deflection mirror 1111 enables laser emitted by the laser input device to be reflected by the deflection mirror 1111 and then change the original light path, so that one laser input device is connected with two laser heads, and the two laser heads can work independently and perform slotting treatment on the battery piece 20.
The laser input and shutter 11 further comprises a laser input joint 112, the laser input joint 112 is fixed on the bottom plate 10 through a bracket 113, one end of the laser input joint 112 is connected with the fixing block 1112, and the other end of the laser input joint is used for being externally connected with a laser input device.
As a preferred technical scheme, the deflection mirror 1111 is vertically disposed and forms a 45-degree angle with the laser light path input by the laser input device, so as to control the light path in the same horizontal plane, and the reflected light path is perpendicular to the original light path, thereby facilitating the arrangement and adjustment of the reflection module 132.
Further, the deflecting mechanism 111 further includes a driving source 1113, and the driving source 1113 is fixed in the fixed block 1112; an arc-shaped groove 1112a is formed in the fixed block, the deflection mirror 1111 is arranged in the arc-shaped groove 1112a in a sliding mode, and the driving source 1113 drives the deflection mirror 1111 to slide in the arc-shaped groove 1112 a; preferably, the driving source 1113 is a voice coil motor to complete high-precision control of the deflection mirror 1111; the voice coil motor is selected because the rotor of the voice coil motor is light in weight and short in response time, high-precision control over small objects can be achieved, and the voice coil motor is long in service life.
Further, referring to fig. 4 to 6, the first reflection assembly 122 includes a first mounting block 1221 and a first reflection mirror 1222, the first reflection mirror 1222 is fixed on the first mounting block 1221, and a lower end of the first mounting block 1221 is connected to the first laser head 121; a first surface 1221a defining the first mounting block 1221 is fixed with the first mirror 1222, a second surface 1221b defining the first mounting block 1221 faces the deflection mechanism 111, a third surface 1221c defining the first mounting block 1221 is connected to the first laser head 121, and holes 1223 are formed on the first surface 1221a, the second surface 1221b and the third surface 1221c, wherein the holes 1223 on the first surface 1221a are respectively communicated with the holes 1223 on the second surface 1221b and the third surface 1221 c.
The through hole 1223 is used for propagation of a laser light path, and when the deflecting mirror 1111 slides to an end where the light path is not blocked, the laser light is emitted from the laser input device and then reflected into the first laser head 121 via the first reflecting mirror 1222.
Further, referring to fig. 4, the first laser cutting module 12 further includes a first fine adjustment sliding table 123, the first fine adjustment sliding table 123 is disposed on the bottom plate 10, a sliding end of the first fine adjustment sliding table 123 is connected to the first mounting block 1221, the first fine adjustment sliding table 123 is used for adjusting a position of the first laser head 121 in a left-right direction, where "left-right" refers to an orientation setting in fig. 4 in this embodiment.
Further, referring to fig. 2 to 7, the reflective module 132 further includes a second reflective element 1321 and a third reflective element 1324, the second reflective element 1321 includes a second mounting block 1322 and a second reflector 1323, the third reflective element 1324 includes a third mounting block 1324 and a third reflector 1326, and the second reflective element 1321 and the third reflective element 1324 are the same as the first reflective element 122 in structure; the second mounting block 1322 is fixedly connected to the second laser head 131, and the third mounting block 1325 is provided on the second mounting block 1322.
Further, the second mirror 1323 is disposed in parallel with the first mirror 1222, and the third mirror 1236 is disposed in parallel with the deflecting mirror 1111.
When the driving source 1113 controls the deflecting mirror 1111 to slide to the shielding position, the laser beam emitted from the laser input device is reflected by the deflecting mirror 1111 into the third reflecting mirror 1326, and then reflected by the third reflecting mirror 1326 into the second reflecting mirror 1323, the third reflecting mirror 1326 is arranged in parallel with the deflecting mirror 1111 so that the light path reflected by the third reflecting mirror 1326 is parallel to the original light path emitted by the laser input device, and the second reflecting mirror 1323 is arranged in parallel with the first reflecting mirror 1222 so that the light path reflected by the second reflecting mirror 1323 is parallel to the light path reflected by the first reflecting mirror 1222, so as to ensure that the distance between the battery piece 20 and the first laser head 121 is the same as the distance between the battery piece 20 and the second laser head 131, thereby ensuring that the laser effects of the first laser head 121 and the second laser head 131 on the battery piece 20 are the same.
Furthermore, the reflective module 132 further includes a second fine adjustment sliding table 1327, the second fine adjustment sliding table 1327 is disposed on the bottom plate 10, a sliding end of the second fine adjustment sliding table 1327 is connected to the second mounting block 1322 through a connecting member 1328, the second fine adjustment sliding table 1327 is used for adjusting a position of the second laser head 131 in a front-back direction, where "front-back" refers to an orientation setting in fig. 4 in this embodiment. The arrangement of the first fine adjustment sliding table 123 and the second fine adjustment sliding table 1327 facilitates the adjustment of the slotting position of the battery piece 20, so as to slot battery pieces 20 with different sizes and specifications.
Further, referring to fig. 1, a hood 14 is disposed on the bottom plate 10, and the hood 14 is of a light-tight closed structure, so as to ensure that propagation of a laser light path is not affected by external illumination, and prevent devices inside the hood from being contaminated by dust and dirt to affect a laser effect.
Further, referring to fig. 5, fig. 6 and fig. 8, the first laser head 121 and the second laser head 131 have the same structure, the first laser head 121 includes a beam expander 1211 and a focusing lens 1212, the upper end of the beam expander 1211 is fixed to the first mounting block 1221, the beam expander 1211 is disposed opposite to the hole 1223, and the lower end of the beam expander 1211 is connected to the focusing lens 1212. The beam expander 1211 is used for expanding the original light path, and the focusing lens 1212 is used for focusing the expanded light path; to reduce the diameter of the focused light spot and reduce the damaged area of the cell 20, so as to protect the cell 20, the specific calculation method is as follows:
the diameter D of the focusing spot is a × F2/(N × F1), where D is the diameter of the focusing spot after the focusing lens 1212 focuses, a is the diameter of the optical fiber core output by the external laser input device, F1 is the focal length of the output head in the external laser input device, F2 is the focal length of the focusing lens 1212, and N is the beam expansion multiple of the beam expander 1211; according to a formula, the larger the beam expansion multiple is, the smaller the diameter of the focusing light spot is;
further, the arrangement of the focusing mirror 1212 enables the laser to generate a focal depth at the focusing point, where the focal depth is a length of the laser spot with little change in size in the laser propagation direction, and the specific calculation method of the focal depth is as follows:
depth of focus RL ═ π D2/4λM2Wherein RL is the focal depth, π is a constant, D is the diameter of the focused spot after the focusing lens 1212 has focused, λ is the wavelength of the laser emitted from the external laser input device, and M is2The quality of the laser beam emitted by the external laser input device; according to the formula, when the diameter of a focusing light spot is smaller, namely the beam expansion multiple is larger, the focal depth is smaller; the laser grooving treatment of the battery piece 20 needs to ensure a certain focal depth, the focal depth with a certain length ensures an effective laser grooving range with a certain length, and errors caused by the fact that the battery piece 20 is located outside the effective laser grooving range due to shaking in the movement process of the battery piece 20 can be reduced.
Referring to fig. 1 to 9, a method for dividing a battery piece 20 into two slots includes the above-mentioned laser head, and the method includes the following steps:
s1, arranging the first laser head 121 and the second laser head 131 to be vertical to the battery piece 20, adjusting and fixing the distance between the focusing lens 1212 and the battery piece 20 in the one-dragging-two grooving laser heads as the focal length of the focusing lens 1212, adjusting the first fine adjustment sliding table 123 and the second fine adjustment sliding table 1327 to adjust the relative positions of the first laser head 121 and the second laser head 131, and setting the battery piece 20 to do uniform linear motion relative to the one-dragging-two grooving laser heads to respectively adjust the distance between the first laser head 121 and the second laser head 131 and the vertical direction of the battery piece 20 as a set value when laser grooving is prepared; the battery piece 20 positioned outside the laser range of the first laser head 121 and the second laser head 131 is moved toward the first laser head 121.
Further, the set value is the focal length value of the focusing lens 1212, and the focal depth of a certain length reduces measurement and adjustment errors when the set value is adjusted.
S2, starting an external laser input device, taking the example that the first edge 20a of the battery piece moves to the position opposite to the first laser head 121 first, when the first edge 20a of the battery piece moves to the position opposite to the first laser head 121, moving the deflection mirror 1111 to the first position, and slotting the first slotting position 20c of the battery piece by the first laser head 121; when the first edge 20a of the battery piece is moved to the position opposite to the second laser head 131, the deflection mirror 1111 is moved to the second position, the second laser head 131 slots the second slot 20d of the battery piece, after the slot is finished, the laser input device is closed, and the deflection mirror 1111 is reset.
S3, when the second edge 20b of the battery piece moves to the position opposite to the first laser 121 head, the laser input device is started, the deflection mirror 1111 moves to the first position, and the first laser head 121 opens a groove at the third groove opening position 20e of the battery piece; when the second edge 20b of the battery piece is moved to the position opposite to the second laser head 131, the deflection mirror 1111 is moved to the second position, and the second laser head 131 opens a groove at the fourth groove 20f of the battery piece.
Further, in S1, before the grooving, the first laser head 121 and the second laser 131 are arranged in a staggered manner in the movement direction of the battery piece 20, and the first laser head 121 is located between the second laser head 131 and the battery piece 20, at this time, the battery piece 20 is arranged to perform uniform linear motion, the first laser head 121 is located between the second laser head 131 and the battery piece 20, and the effect that after the battery piece 20 performs uniform linear motion, the first edge 20a of the battery piece firstly moves to the position right opposite to the first laser head 121 and then moves to the position right opposite to the second laser head 131, and similarly, the second edge 20b of the battery piece firstly moves to the position right to the first laser head 121 and then moves to the position right opposite to the second laser head 131, so that the whole grooved battery piece 20 does not need to stop moving, and the production efficiency is greatly improved.
When the cell 20 is divided into three equal parts, the first slot 20c and the second slot 20d are located at the third edge 20a, and the third slot 20e and the fourth slot 20f are located at the third edge 20 b.
It should be emphasized that, although particular embodiments of the present invention have been shown and described, it is not intended to limit the invention in any way, and any simple modification, equivalent change or modification of the above embodiments, which are made in accordance with the technical essence of the present invention, still fall within the scope of the technical solution of the present invention.

Claims (10)

1. The utility model provides a one drags two fluting laser heads which characterized in that: the laser cutting device comprises a bottom plate, a laser input light adding gate, a first laser cutting module and a second laser cutting module, wherein the laser input light adding gate is arranged on the bottom plate and is externally connected with a laser input device; the first laser cutting module comprises a first laser head, the first laser head is connected with a first reflection assembly, and when the deflection mirror slides to a first position, the first laser head is communicated with a light path of the laser input device through the first reflection assembly; the second laser cutting module includes the second laser head, the reflection module is connected to the second laser head, works as when the deflection mirror slides to the second position, the second laser head passes through the reflection module with laser input device realizes that the light path communicates with each other.
2. The one with two grooving laser heads of claim 1, wherein: the first reflection assembly comprises a first mounting block and a first reflection mirror, the first reflection mirror is fixed on the first mounting block, and the lower end of the first mounting block is connected with the first laser head; the definition the first fixed mirror of first surface of first installation piece, the definition the second surface of first installation piece is just right deflection mechanism defines the third surface of first installation piece is connected first laser head, the first surface the second surface and all be equipped with the hole on the third surface, wherein hole on the first surface respectively with the second surface and hole on the third surface runs through and communicates with each other.
3. The one with two grooving laser heads of claim 2, wherein: the first laser cutting module further comprises a first fine adjustment sliding table, the first fine adjustment sliding table is arranged on the bottom plate, and the sliding end of the first fine adjustment sliding table is connected with the first installation block.
4. The one with two grooving laser heads of claim 1, wherein: the reflection module further comprises a second reflection assembly and a third reflection assembly, the second reflection assembly comprises a second mounting block and a second reflector, the third reflection assembly comprises a third mounting block and a third reflector, and the second reflection assembly and the third reflection assembly are both the same as the first reflection assembly in structure; the second mounting block is fixedly connected with the second laser head, and the third mounting block is arranged on the second mounting block.
5. The one with two grooving laser heads of claim 4, wherein: the second reflector is arranged in parallel with the first reflector, and the third reflector is arranged in parallel with the deflection mirror.
6. The one with two grooving laser heads of claim 4, wherein: the reflection module further comprises a second fine adjustment sliding table, the second fine adjustment sliding table is arranged on the bottom plate, and the sliding end of the second fine adjustment sliding table is connected with the second installation block.
7. The one with two grooving laser heads of claim 1, wherein: the bottom plate is provided with a hood which is of a light-tight closed structure.
8. The one with two grooving laser heads of claim 1, wherein: first laser head includes beam expanding lens and focusing mirror, the upper end of beam expanding lens is fixed in first installation piece, the lower extreme of beam expanding lens is connected the focusing mirror.
9. A method for dividing a battery piece into three grooves is characterized by comprising any one of the two-by-two groove laser heads, and the method comprises the following steps:
s1, arranging the first laser head and the second laser head perpendicular to the battery piece, and respectively adjusting the distance between the first laser head and the battery piece in the vertical direction and the distance between the second laser head and the battery piece in the vertical direction to be set values; arranging the battery piece outside the laser range of the first laser head and the second laser head to move towards the first laser head;
s2, starting an external laser input device, moving the deflection mirror to a first position when the first edge of the battery piece moves to the position opposite to the first laser head, and slotting the first slot of the battery piece by the first laser head; after the grooving is finished, when the first edge of the battery piece is moved to the position opposite to the second laser head, the deflection mirror is moved to the second position, the second laser head performs grooving on the second grooving position of the battery piece, the laser input device is closed after the grooving of the second grooving position is finished, and the deflection mirror is reset;
s3, when the second edge of the battery piece moves to the position opposite to the first laser head, the laser input device is started, the deflection mirror is moved to the first position, and the first laser head opens a groove at the third groove of the battery piece; and when the second edge of the battery piece is moved to the position opposite to the second laser head, the deflection mirror is moved to the second position, and the second laser head slots a fourth slot of the battery piece.
10. The method for dividing a battery plate into three grooves according to claim 9, wherein: in S1, before the grooving, the first laser head and the second laser head are arranged in a staggered mode in the moving direction of the battery piece, and the first laser head is located between the second laser head and the battery piece.
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