CN110000472A - A kind of method for laser welding of power battery module aluminium alloy end plate and side plate - Google Patents
A kind of method for laser welding of power battery module aluminium alloy end plate and side plate Download PDFInfo
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- CN110000472A CN110000472A CN201910141148.XA CN201910141148A CN110000472A CN 110000472 A CN110000472 A CN 110000472A CN 201910141148 A CN201910141148 A CN 201910141148A CN 110000472 A CN110000472 A CN 110000472A
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- Prior art keywords
- laser
- aluminium alloy
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- welding
- side plate
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Classifications
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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
- B23K26/20—Bonding
- B23K26/21—Bonding by welding
-
- 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
- B23K26/20—Bonding
- B23K26/21—Bonding by welding
- B23K26/24—Seam welding
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- Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Engineering & Computer Science (AREA)
- Plasma & Fusion (AREA)
- Mechanical Engineering (AREA)
- Laser Beam Processing (AREA)
- Sealing Battery Cases Or Jackets (AREA)
Abstract
The invention discloses the method for laser welding of a kind of power battery module aluminium alloy end plate and side plate, comprising steps of the first step, the right end of aluminium alloy end plate (40) to be welded are fitted closely with the left end bending part (300) of aluminium alloy side plate (30)；Second step uses laser beam (10), successively according to default first machined parameters and default second machined parameters, to being welded in the middle part of the left end bending part (300) of aluminium alloy side plate (30), wherein, it uses the welding track of the laser beam (10) of default first machined parameters for straight line, uses the welding track of the laser beam (10) of default second machined parameters for helical curve.The present invention can effectively avoid the generation of splatter object and burr, enhance the security performance of battery modules, improve the quality of production and production efficiency of battery modules when carrying out laser welding to battery modules aluminium alloy end plate and side plate.
Description
Technical field
The present invention relates to technical field of laser processing, more particularly to a kind of power battery module aluminium alloy end plate and side plate
Method for laser welding.
Background technique
Currently, laser welding process is in the manufacturing aluminum alloy materials welding of power battery with very extensive.Laser
Welding procedure has advantage richly endowed by nature in terms of the welding of aluminum alloy materials, because it can be realized the efficient of aluminum alloy materials
Protection.
However, in aluminum alloy piping welding practice, with laser welding process there is also certain drawback, this be also aluminium alloy from
What body thermodynamic property determined, although this characteristic can be realized the effective protection of aluminum alloy materials, but can not effectively keep away
Exempt from molten bath splash, often found in the coarse welding processes such as jagged of weld seam as.
The a part for welding the splatter object generated can be siphoned away by dust-collecting equipment, some biggish splatter
Object can be attached to face of weld, these splatter objects and burr are easy to fall off from face of weld, after falling off, biggish metal
Battery core surface film is cut in clast presence causes the hidden danger of battery short circuit, therefore, do not allow metal fragment to deposit in battery modules
?.Meanwhile when manual handling battery modules, there is also the security risks of metal burr incised wound employee's body skin.
Currently, conventional method is to clear up splatter object and polishing by manually after the completion of conventional bonding technique
Burr, and metal fragment is siphoned away with dust catcher, this not only adds the production human costs of battery modules, reduce production effect
Rate, meanwhile, manual polishing is also easy to scratch the end plate and side plate of battery modules, influences the overall appearance of battery modules.
Summary of the invention
In view of this, the object of the present invention is to provide the laser weldings of a kind of power battery module aluminium alloy end plate and side plate
Method can effectively avoid splatter object and hair when carrying out laser welding to battery modules aluminium alloy end plate and side plate
The generation of thorn enhances the security performance of battery modules, improves the quality of production and production efficiency of battery modules, reduces battery modules
Whole production cost, have great practice significance.
For this purpose, the present invention provides the method for laser welding of a kind of power battery module aluminium alloy end plate and side plate, including
Following steps:
The first step, the right end of aluminium alloy end plate to be welded and the left end bending part of aluminium alloy side plate fit closely；
Second step, using laser beam, successively according to default first machined parameters and default second machined parameters, to aluminium alloy
Welded in the middle part of the left end bending part of side plate, wherein use the welding track of the laser beam of default first machined parameters for
Straight line uses the welding track of the laser beam of default second machined parameters for helical curve.
Wherein, the aluminium alloy end plate and aluminium alloy side plate, their material is respectively five systems and six line aluminium alloys.
Wherein, aluminium alloy side plate with a thickness of 1~1.5mm.
Wherein, in the first step, the right end of aluminium alloy end plate is bonded to each other with the left end bending part of aluminium alloy side plate, is seamless
Gap.
Wherein, in second step, using the welding track of the laser beam of default second machined parameters, covering is using default the
The welding track of the laser beam of one machined parameters.
Wherein, the first machined parameters are preset specifically: laser power is 2000~2800W, and laser processing movement speed is
80~120mm/s；
Default second machined parameters specifically: laser power is 1000~2000W, laser processing movement speed is 1000~
2000mm/s。
Wherein, in second step, when using the welding track of laser beam of default second machined parameters for helical curve,
The helical curve is the helical curve that vertical amplitude is 1.5~2.5mm, frequency is 2000~4000Hz.
Wherein, in second step, the helical curve is the spiral shell that spiral line width is 1~3mm, frequency is 2000~4000Hz
Spin line.
Wherein, in second step, laser beam is the laser beam that continuous wave laser generates；
The laser defocusing amount for the laser beam that continuous wave laser generates is -10~10mm；
The wavelength for the laser beam that continuous wave laser generates is 1064nm.
By the above technical solution provided by the invention as it can be seen that compared with prior art, the present invention provides a kind of power
The method for laser welding of battery modules aluminium alloy end plate and side plate can be carried out to battery modules aluminium alloy end plate and side plate
When laser welding, the generation of splatter object and burr is effectively avoided, enhances the security performance of battery modules, improves battery modules
The quality of production and production efficiency, reduce the whole production cost of battery modules, have great practice significance.
In addition, for a kind of method for laser welding of power battery module aluminium alloy end plate and side plate provided by the invention,
It can improve weld appearance, guarantee the overall aesthetic degree of battery modules.
Detailed description of the invention
Fig. 1 is the process of the method for laser welding of a kind of power battery module aluminium alloy end plate that the present invention improves and side plate
Figure；
Fig. 2 is to use a kind of method for laser welding of power battery module aluminium alloy end plate and side plate provided by the invention,
The positional diagram of the end plate and side plate that are welded；
In figure, 10 be laser beam, and 20 be default second machining locus, and 30 be aluminium alloy side plate, and 40 be aluminium alloy end plate.
Specific embodiment
In order to enable those skilled in the art to better understand the solution of the present invention, with reference to the accompanying drawing with embodiment to this
Invention is described in further detail.
Referring to Fig. 1, Fig. 2, the present invention provides the laser welding sides of a kind of power battery module aluminium alloy end plate and side plate
Method, comprising the following steps:
The left end bending part 300 of the first step, the right end of aluminium alloy end plate 40 to be welded and aluminium alloy side plate 30 closely pastes
It closes；
Second step, using laser beam 10, successively according to default first machined parameters and default second machined parameters, aluminium is closed
It is welded in the middle part of the left end bending part 300 (i.e. with the contact portion of aluminium alloy end plate 40) of golden side plate 30, wherein using default
The welding track of the laser beam 10 of first machined parameters is straight line, using the welding rail of the laser beam 10 of default second machined parameters
Mark is helical curve (shown in Figure 2).
In the present invention, in specific implementation, in the first step, the aluminium alloy end plate 40 and aluminium alloy side plate 30, they
Material be respectively five systems and six line aluminium alloys.
In the present invention, in specific implementation, in the first step, aluminium alloy side plate 30 with a thickness of 1~1.5mm.
In the present invention, in specific implementation, in the first step, the right end of aluminium alloy end plate 40 and a left side for aluminium alloy side plate 30
End bending part is bonded to each other, is seamless.
In the present invention, in specific implementation, in second step, using the welding of the laser beam 10 of default second machined parameters
Track, covering use the welding track of the laser beam 10 of default first machined parameters.
It should be noted that two kinds of different machining parameters are successively successively automatically continuously called, to aluminium alloy for the present invention
The left end bending part (i.e. with the contact portion of aluminium alloy end plate 40) of side plate 30 carries out laser welding processing, presets the second machined parameters
The helical trajectory of laser welding processing is carried out, the straight path that default first machined parameters carry out laser welding processing is covered.
In the present invention, in specific implementation, in second step, the first machined parameters are preset specifically: laser power is
2000~2800W, laser processing movement speed are 80~120mm/s, the as laser processing parameter of high power low speed.
Default second machined parameters specifically: laser power is 1000~2000W, laser processing movement speed is 1000~
2000mm/s, the as laser processing parameter of low power high speed.
In the present invention, in specific implementation, in second step, when the weldering of the laser beam 10 using default second machined parameters
When the mark that integrates with is helical curve, the helical curve is the spiral shell that vertical amplitude is 1.5~2.5mm, frequency is 2000~4000Hz
Revolve curve.
In the present invention, in specific implementation, in second step, the helical curve be preferably spiral line width be 1~3mm,
Frequency is the helix of 2000~4000Hz.
In the present invention, in specific implementation, in second step, specifically can by using high-power continuous wave laser,
In the welding control software that continuous wave laser carries, the two kinds of entirely different laser processings of high power low speed and low power high speed are set
Parameter (i.e. default first machined parameters and default second machined parameters).
It should be noted that about default first machined parameters and the second machined parameters are preset for the present invention, both
The process operation of laser processing parameter automatically continuously carries out.
In the present invention, in specific implementation, in second step, laser beam 10 is preferably the laser that continuous wave laser generates
Beam.
In specific implementation, welding position can be moved to using the galvanometer head that industrial robot carries continuous wave laser.
In specific implementation, the industrial machine artificially has the industrial robot of six axis robot.
In specific implementation, in second step, continuous wave laser generate laser beam 10 laser defocusing amount be -10~
10mm。
In specific implementation, in second step, the wavelength for the laser beam 10 that continuous wave laser generates is 1064nm.
Below with reference to specific embodiment, to illustrate technical solution of the present invention.
Referring to figure 1 and figure 2, specific step is as follows for embodiment:
The first step selects the aluminium alloy side plate 30 of five systems of 1.0mm thickness and the aluminium alloy end plate 40 of six systems to assemble, it is ensured that
End plate is adjacent to seamless with plate-side plate welding position.
Second step, select Beijing Coase Instrument Ltd. production, the high power of model IPG YLS-6000 it is continuous
Laser, cooperation high power galvanometer head can store a variety of as laser optical system, the included welding control software of continuous wave laser
Welding condition is arranged in welding control software and stores the first laser welding process parameter (i.e. default first processing ginseng
Number), laser power 2400W, speed 100mm/s, defocusing amount+2mm, welding track is 65mm straight line.It is arranged and stores
Two kinds of laser welding process parameters (i.e. default second machined parameters), laser power 1200W, speed 1000mm/s, defocus
Amount+2mm, welding track are as follows: spiral line width 2mm, the helix of frequency 3000Hz.
Third step, industrial robot carry galvanometer and move to welding position, call the first technological parameter (i.e. default first
Machined parameters) it is processed with laser beam 10, after the completion of preceding working procedure, call second of laser technical parameters (i.e. default immediately
Second machined parameters) it is processed, what second operation work was formed presets the second machining locus 20 for the processing rail of the first procedure
Mark (i.e. straight path) covering.
It is proved by practice test, by the process of first of laser technical parameters, the structural strength meet demand of material,
After second laser technical parameters process, face of weld slight crack, metal burr and splashing residual eliminating.Using the technique
Battery modules aluminium alloy end plate and side plate laser welding are carried out, so that battery is avoided short-circuit risks, while reducing manual polishing
Process, avoids burr from cutting hand, Improving The Quality of Products stability, and appearance is very significantly improved.
Compared with prior art, the Laser Welding of a kind of power battery module aluminium alloy end plate and side plate provided by the invention
Method is connect, is had the advantages that
1, the laser power of default first machined parameters is big, process velocity is slow, carries out deep penetration welding to material, keeps end side plate full
Sufficient Structural strength calls.The laser work that the energy of default second machined parameters is weaker, speed is exceedingly fast is called after the completion of preceding working procedure
Process track processes before skill parameters distribution, and the laser energy due to presetting the second machined parameters is not up to the fusing point of primer,
Only Surface absorption energy, splatter and burr temperature are sharply increased to fusing point or more and even vaporize, and become the gold of very little
Belong to dust and metallic vapour, is very easy to be taken away by dust-collecting equipment.
2, it is first processed at a slow speed with the high power laser light that default first machined parameters have, then had with default second machined parameters
Some low-power laser rapid processings, after preceding working procedure processing, later process carries out weld seam cooling velocity and is substantially reduced, thus
The bead crack for effectively preventing temperature steep drop generates, while weld stress is released effectively, and weld strength is improved.
3, after the completion of successive twice welding sequence, face of weld is smooth, impulse- free robustness and remains without splashing, subsequent no longer to need
Artificial cleaning and polishing metal burr, avoid manpower in handling process from being hurt by burr, raising efficiency, appearance is effectively changed
It is kind.
In conclusion compared with prior art, a kind of power battery module aluminium alloy end plate provided by the invention and side
The method for laser welding of plate can effectively avoid gold when carrying out laser welding to battery modules aluminium alloy end plate and side plate
The generation for belonging to splash and burr, enhances the security performance of battery modules, improves the quality of production and production efficiency of battery modules,
The whole production cost of battery modules is reduced, there is great practice significance.
In addition, for a kind of method for laser welding of power battery module aluminium alloy end plate and side plate provided by the invention,
It can improve weld appearance, guarantee the overall aesthetic degree of battery modules.
The above is only a preferred embodiment of the present invention, it is noted that for the ordinary skill people of the art
For member, various improvements and modifications may be made without departing from the principle of the present invention, these improvements and modifications are also answered
It is considered as protection scope of the present invention.
Claims (9)
1. a kind of method for laser welding of power battery module aluminium alloy end plate and side plate, which comprises the following steps:
The left end bending part (300) of the first step, the right end of aluminium alloy end plate (40) to be welded and aluminium alloy side plate (30) is close
Fitting；
Second step, using laser beam (10), successively according to default first machined parameters and default second machined parameters, to aluminium alloy
It is welded in the middle part of the left end bending part (300) of side plate (30), wherein using the laser beam (10) of default first machined parameters
Welding track be straight line, use the welding track of the laser beam (10) of default second machined parameters for helical curve.
2. method for laser welding as described in claim 1, which is characterized in that the aluminium alloy end plate (40) and aluminium alloy side plate
(30), their material is respectively five systems and six line aluminium alloys.
3. method for laser welding as described in claim 1, which is characterized in that aluminium alloy side plate (30) with a thickness of 1~
1.5mm。
4. method for laser welding as described in claim 1, which is characterized in that in the first step, the right side of aluminium alloy end plate (40)
It holds and is bonded to each other with the left end bending part of aluminium alloy side plate (30), is seamless.
5. method for laser welding as described in claim 1, which is characterized in that in second step, joined using default second processing
The welding track of several laser beams (10), covering use the welding track of the laser beam (10) of default first machined parameters.
6. method for laser welding as described in claim 1, which is characterized in that default first machined parameters specifically: laser function
Rate is 2000~2800W, and laser processing movement speed is 80~120mm/s；
Default second machined parameters specifically: laser power is 1000~2000W, laser processing movement speed is 1000~
2000mm/s。
7. method for laser welding as described in claim 1, which is characterized in that in second step, when using default second processing
When the welding track of the laser beam (10) of parameter is helical curve, the helical curve is that vertical amplitude is 1.5~2.5mm, frequency
Rate is the helical curve of 2000~4000Hz.
8. method for laser welding as described in claim 1, which is characterized in that in second step, the helical curve is spiral
The helix that line width is 1~3mm, frequency is 2000~4000Hz.
9. such as method for laser welding described in any item of the claim 1 to 8, which is characterized in that in second step, laser beam
(10) be continuous wave laser generate laser beam；
The laser defocusing amount for the laser beam (10) that continuous wave laser generates is -10~10mm；
The wavelength for the laser beam (10) that continuous wave laser generates is 1064nm.
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| CN201910141148.XA CN110000472A (en) | 2019-02-26 | 2019-02-26 | A kind of method for laser welding of power battery module aluminium alloy end plate and side plate |
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| CN201910141148.XA CN110000472A (en) | 2019-02-26 | 2019-02-26 | A kind of method for laser welding of power battery module aluminium alloy end plate and side plate |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113020791A (en) * | 2021-03-12 | 2021-06-25 | 武汉逸飞激光股份有限公司 | Welding method for outer frame of battery module |
| CN114639909A (en) * | 2022-03-29 | 2022-06-17 | 远景动力技术(江苏)有限公司 | Battery pack shell and manufacturing method thereof |
| GB2605414A (en) * | 2021-03-31 | 2022-10-05 | Jaguar Land Rover Ltd | Methods for welding components of battery modules |
| WO2023134318A1 (en) * | 2022-01-12 | 2023-07-20 | 宁德时代新能源科技股份有限公司 | Connecting component, battery cell, battery and electric device |
| TWI834045B (en) * | 2021-06-25 | 2024-03-01 | 台達電子工業股份有限公司 | Laser welding system using dynamic light spot size and method thereof |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| TWI834045B (en) * | 2021-06-25 | 2024-03-01 | 台達電子工業股份有限公司 | Laser welding system using dynamic light spot size and method thereof |
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Application publication date: 20190712 |
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