CN106229429A - A kind of dual wavelength complex welding method of cover plate of power battery - Google Patents
A kind of dual wavelength complex welding method of cover plate of power battery Download PDFInfo
- Publication number
- CN106229429A CN106229429A CN201610729577.5A CN201610729577A CN106229429A CN 106229429 A CN106229429 A CN 106229429A CN 201610729577 A CN201610729577 A CN 201610729577A CN 106229429 A CN106229429 A CN 106229429A
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- CN
- China
- Prior art keywords
- laser
- welding
- cover plate
- dual wavelength
- power
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 238000003466 welding Methods 0.000 title claims abstract description 69
- 230000009977 dual effect Effects 0.000 title claims abstract description 30
- 238000000034 method Methods 0.000 title claims abstract description 25
- 239000007769 metal material Substances 0.000 claims abstract description 15
- 230000006798 recombination Effects 0.000 claims abstract description 13
- 238000005215 recombination Methods 0.000 claims abstract description 13
- 239000008393 encapsulating agent Substances 0.000 claims abstract description 3
- 230000002085 persistent effect Effects 0.000 claims abstract description 3
- 229910000679 solder Inorganic materials 0.000 claims abstract 2
- 239000007789 gas Substances 0.000 claims description 8
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 claims description 7
- 230000001681 protective effect Effects 0.000 claims description 5
- 239000004065 semiconductor Substances 0.000 claims description 5
- 229910052757 nitrogen Inorganic materials 0.000 claims description 4
- 238000007493 shaping process Methods 0.000 claims description 4
- 229910000838 Al alloy Inorganic materials 0.000 claims description 2
- 239000011324 bead Substances 0.000 abstract description 2
- 230000003287 optical effect Effects 0.000 abstract description 2
- 150000001875 compounds Chemical class 0.000 abstract 1
- 238000010586 diagram Methods 0.000 description 5
- 230000004927 fusion Effects 0.000 description 5
- 230000035515 penetration Effects 0.000 description 5
- 239000000155 melt Substances 0.000 description 4
- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical compound [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 description 3
- 239000002131 composite material Substances 0.000 description 3
- 229910052744 lithium Inorganic materials 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 2
- 238000002844 melting Methods 0.000 description 2
- 230000008018 melting Effects 0.000 description 2
- 229910001334 3003 aluminium alloy Inorganic materials 0.000 description 1
- 229910045601 alloy Inorganic materials 0.000 description 1
- 239000000956 alloy Substances 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000003792 electrolyte Substances 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 150000002829 nitrogen Chemical class 0.000 description 1
- 230000000649 photocoagulation Effects 0.000 description 1
- 239000013589 supplement Substances 0.000 description 1
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
- H01M50/10—Primary casings; Jackets or wrappings
- H01M50/147—Lids or covers
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
- H01M50/10—Primary casings; Jackets or wrappings
- H01M50/183—Sealing members
-
- 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
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/10—Energy storage using batteries
Landscapes
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Sealing Battery Cases Or Jackets (AREA)
Abstract
The invention discloses the dual wavelength complex welding method of a kind of cover plate of power battery; the method is under a shielding gas; the metal material of battery cover board is welded by being combined linear electric motors by the dual wavelength recombination laser that main wave band of laser and time wave band of laser are compound; wherein; main wave band of laser carries out molten solder to the metal material of battery cover board; the metal material of battery cover board is preheated and increases the encapsulant molten condition persistent period by secondary wave band of laser, and completes the welding of cover plate of power battery at high speeds.The present invention meets the power density needed for welding by using superpower laser；And select outstanding optical arrangement to ensure the stability of welding；And use linear electric motors to ensure welding track precision under high-speed motion.By using above-mentioned welding method to greatly improve welding efficiency and the welding quality of battery cover board, welding bead smooth surface even uniform, there is more preferable safety.
Description
[technical field]
The present invention relates to laser welding technology field, particularly to the dual wavelength complex welding method of a kind of cover plate of power battery.
[background technology]
Lithium battery is the new generation of green high-energy battery that performance is remarkable, because it has high voltage, high power capacity, low consumption, memoryless
The features such as effect, nuisanceless, volume is little, internal resistance is little, self discharge is few, cycle-index is many.And be widely used in pure electric automobile, mix
Close power set, plug-in hybrid-power automobile and boats and ships, track traffic, solar energy, wind generator system, mobile phone,
Notebook computers etc. are numerous civilian and military field.Especially with the development of electric automobile, the requirement to lithium battery performance is got over
Come the highest.
Lithium battery in the fabrication process, needs battery cover board to be welded to the opening of battery container and by housing seal.
As it is shown in figure 1, commonly use the mode of laser welding cover plate of power battery in current industry, the feature of this welding manner is welding
Rear joint is stable, and welding degree of freedom is big.After electrical core of power battery puts into housing, cover plate and housing are fixed by fixture and pass through to swash
Photocoagulation is by housing seal, and the speed of welding of current battery cover plate is 50mm/s 70mm/s, and battery cover board is under high-speed welding
Weld pool stability is poor, requires height for assembly precision, and speed of welding lifting is limited, welding speed-raising rear stability is low and fixed to workpiece
Position requires height.
[summary of the invention]
In sum, the main purpose of the present invention is to solve existing cover plate of power battery welding pool poor stability, for
Assembly precision requires height, and speed of welding promotes limited, the welding speed-raising technical problem that rear stability is low, workpiece positioning requirements is high,
And the dual wavelength complex welding method of a kind of cover plate of power battery is provided.
In order to solve above-mentioned technical problem, the present invention provides the dual wavelength complex welding method of a kind of cover plate of power battery,
The method is under a shielding gas, double by be combined by main wave band of laser and time wave band of laser to the metal material of battery cover board
Wavelength recombination laser combines linear electric motors and welds, and wherein, the metal material of battery cover board is melted by main wave band of laser
Welding, secondary wave band of laser preheats and increases the encapsulant molten condition persistent period to the metal material of battery cover board, and
Complete the welding of cover plate of power battery at high speeds.
Described dual wavelength recombination laser is launched by multiwavelength laser plumb joint.
Described dual wavelength recombination laser is different with the wavelength of time wave band laser shaping and power by main wave band of laser
Recombination laser.
The wavelength of described main wave band of laser is 1070nm, its laser power in the range of 2200W-2300W, speed of welding
Scope is 200mm/s-250mm/s, and defocusing amount is-3mm.
The laser power of described main wave band of laser is 2300W, and its speed of welding is 200mm/s.
The wavelength of described wave band of laser is 915nm, its semiconductor power in the range of 850W-900W, speed of welding
Scope is 200mm/s-250mm/s, and defocusing amount is-3mm.
The semiconductor power of described wave band of laser is 900W, and its speed of welding is 200mm/s.
Described protective gas is nitrogen, and this protective gas is welded by out of focus.
The metal material of described battery cover board is aluminium alloy.
Use technique scheme, compared with prior art, have the beneficial effects that produced by the present invention: be double by using
Cover plate of power battery is welded on battery opening and is sealed against by wavelength composite welding process, and dual wavelength recombination laser is by two
The different laser shaping of wave band, power forms.By using superpower laser to meet the power density needed for welding；And select
The stability of welding is ensured by outstanding optical arrangement；And use linear electric motors to ensure welding track essence under high-speed motion
Degree.By using above-mentioned welding method to greatly improve welding efficiency and the welding quality of battery cover board, welding bead smooth surface is put down
Whole uniformly, there is more preferable safety.
[accompanying drawing explanation]
Fig. 1 is the structural representation after the welding of existing Single wavelength pulse laser；
Fig. 2 is the structural representation after dual wavelength composite welding of the present invention；
Fig. 3 be the main band power of the present invention be welded condition schematic diagram during 2200W；
Fig. 4 be the main band power of the present invention be another welded condition schematic diagram during 2200W；
Fig. 5 be the main band power of the present invention be welded condition schematic diagram during 2300W；
Fig. 6 be the main band power of the present invention be another welded condition schematic diagram during 2300W；
Fig. 7 be the main band power of the present invention be welded condition schematic diagram during 2400W.
[detailed description of the invention]
The following example is the present invention to be explained further and supplements, and the present invention will not be constituted any restriction.
Such as Fig. 2, the inventive point of the dual wavelength complex welding method of cover plate of power battery of the present invention is: at protective gas
Under, the metal material of battery cover board is combined straight by the dual wavelength recombination laser being combined by main wave band of laser and time wave band of laser
Line motor welds, and in the present embodiment, linear electric motors can be any known linear electric motors.Described dual wavelength recombination laser
Bundle is launched by dual-wavelength laser plumb joint.In the present embodiment, described protective gas is nitrogen, this nitrogen by from
Jiao welds.In the present embodiment, the negative out of focus welding manner using defocusing amount to be-3mm, therefore can obtain bigger melting
Deeply.In the present embodiment, the metal material of described battery cover board uses 3003 aluminium alloys.Further, described dual wavelength is combined
Laser is the recombination laser of the laser shaping by two different-waveband different capacities.Further, described dual wavelength is combined
Laser includes main wave band of laser and secondary wave band of laser.Wherein, main wave band of laser carries out melting to the metal material of battery cover board
Connecing, secondary wave band of laser preheats and increases material molten state duration to the metal material of battery cover board, and at a high speed
The welding of battery cover board is completed under state.
In the present embodiment, as shown in figure 3 to figure 7, the wavelength of described main wave band of laser is 1070nm, the model of its laser power
Enclose for 2200W-3000W, it is preferable that its laser power is 2300W；The speed of welding of main wave band of laser is in the range of 200mm/s-
250mm/s, it is preferable that its speed of welding is 200mm/s.Specifically, such as Fig. 3, when the laser power of main wave band of laser is 2200W
Time, it melts a width of 1.448mm, and fusion penetration is 1.231mm；Such as Fig. 4, when the laser power of main wave band of laser is 2200W, its molten width
For 1.373mm, fusion penetration is 0.879mm；Such as Fig. 5, when the laser power of main wave band of laser is 2300W, it melts a width of
1.390mm, fusion penetration is 0.745mm；Such as Fig. 6, when the laser power of main wave band of laser is 2300W, it melts a width of 1.473mm,
Fusion penetration is 1.214mm；Such as Fig. 7, when the laser power of main wave band of laser is 2400W, it melts a width of 1.206mm, and fusion penetration is
0.980mm.Can be learnt by the welding parameter of above-mentioned main wave band of laser, the welding depth-to-width ratio of dual wavelength is smaller, can ensure molten width
In the case of reduce heat affected area.Making the smooth in appearance after dual wavelength welding, melt tank edge district is fine and smooth uniformly.Use this Welder
After skill, electrolyte outwards will not be oozed out by the welding position of battery cover board, therefore has more preferable safety.
The wavelength of described wave band of laser is 915nm, and its semiconductor power is in the range of 850W-900W, it is preferable that partly lead
Body power is 900W；The speed of welding of described wave band of laser is in the range of 200mm/s-250mm/s, it is preferable that it welds speed
Degree is 200mm/s.As in figure 2 it is shown, by use dual wavelength composite welding technique after, dual wavelength welding speed maintain
200mm/s-250mm/s, speed of welding is relatively stable.
Although being disclosed the present invention by above example, but the scope of the present invention is not limited thereto,
Under conditions of present inventive concept, above each component can come with the similar or equivalent element that art personnel understand
Replace.
Claims (9)
1. the dual wavelength complex welding method of a cover plate of power battery, it is characterised in that the method is under a shielding gas, right
The metal material of battery cover board is by the dual wavelength recombination laser being combined by main wave band of laser and time wave band of laser and combines straight line
Motor welds, and wherein, main wave band of laser carries out molten solder to the metal material of battery cover board, and secondary wave band of laser is to battery
The metal material of cover plate carries out preheating and increase the encapsulant molten condition persistent period, and completes power current at high speeds
The welding of basin lid plate.
The dual wavelength complex welding method of cover plate of power battery the most according to claim 1, it is characterised in that described double wave
Long recombination laser is launched by multiwavelength laser plumb joint.
The dual wavelength complex welding method of cover plate of power battery the most according to claim 1, it is characterised in that described double wave
Long recombination laser is the recombination laser different with the wavelength of time wave band laser shaping and power by main wave band of laser.
The dual wavelength complex welding method of cover plate of power battery the most according to claim 3, it is characterised in that described main ripple
The wavelength of Duan Jiguang is 1070nm, and its laser power is in the range of 2200W-2300W, and speed of welding is in the range of 200mm/s-
250mm/s, defocusing amount is-3mm.
The dual wavelength complex welding method of cover plate of power battery the most according to claim 4, it is characterised in that described main ripple
The laser power of Duan Jiguang is 2300W, and its speed of welding is 200mm/s.
The dual wavelength complex welding method of cover plate of power battery the most according to claim 3, it is characterised in that described subwave
The wavelength of Duan Jiguang is 915nm, and its semiconductor power is in the range of 850W-900W, and speed of welding is in the range of 200mm/s-
250mm/s, defocusing amount is-3mm.
The dual wavelength complex welding method of cover plate of power battery the most according to claim 6, it is characterised in that described subwave
The semiconductor power of Duan Jiguang is 900W, and its speed of welding is 200mm/s.
The dual wavelength complex welding method of cover plate of power battery the most according to claim 1, it is characterised in that described protection
Gas is nitrogen, and this protective gas is welded by out of focus.
The dual wavelength complex welding method of cover plate of power battery the most according to claim 1, it is characterised in that described battery
The metal material of cover plate is aluminium alloy.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610729577.5A CN106229429A (en) | 2016-08-26 | 2016-08-26 | A kind of dual wavelength complex welding method of cover plate of power battery |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610729577.5A CN106229429A (en) | 2016-08-26 | 2016-08-26 | A kind of dual wavelength complex welding method of cover plate of power battery |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN106229429A true CN106229429A (en) | 2016-12-14 |
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ID=57555469
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610729577.5A Pending CN106229429A (en) | 2016-08-26 | 2016-08-26 | A kind of dual wavelength complex welding method of cover plate of power battery |
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| Country | Link |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107127451A (en) * | 2017-05-12 | 2017-09-05 | 东莞市力星激光科技有限公司 | A kind of electrokinetic cell low energy consumption laser welding process |
| CN108340073A (en) * | 2017-12-28 | 2018-07-31 | 上海君屹工业自动化股份有限公司 | A kind of battery modules aluminum alloy casing laser welding process |
| CN109093259A (en) * | 2017-06-21 | 2018-12-28 | 深圳市联赢激光股份有限公司 | A kind of compound wire feed welding method of dual wavelength |
| CN109967877A (en) * | 2017-12-25 | 2019-07-05 | 大族激光科技产业集团股份有限公司 | A kind of method for laser welding and system |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH11250871A (en) * | 1998-02-26 | 1999-09-17 | Sanyo Electric Co Ltd | Manufacture of sealed battery |
| CN101564799A (en) * | 2008-04-25 | 2009-10-28 | 宝山钢铁股份有限公司 | Compound welding method by using semiconductor laser and CO2 laser |
| CN101733553A (en) * | 2008-11-21 | 2010-06-16 | 中国第一汽车集团公司 | Laser welding method for metal part by dual-wavelength dual laser beam |
| CN103182604A (en) * | 2013-03-12 | 2013-07-03 | 镭射谷科技(深圳)有限公司 | Laser hybrid welding method and system |
| CN105562930A (en) * | 2016-03-03 | 2016-05-11 | 武汉华工激光工程有限责任公司 | Laser welding method for power battery outer shell |
-
2016
- 2016-08-26 CN CN201610729577.5A patent/CN106229429A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH11250871A (en) * | 1998-02-26 | 1999-09-17 | Sanyo Electric Co Ltd | Manufacture of sealed battery |
| CN101564799A (en) * | 2008-04-25 | 2009-10-28 | 宝山钢铁股份有限公司 | Compound welding method by using semiconductor laser and CO2 laser |
| CN101733553A (en) * | 2008-11-21 | 2010-06-16 | 中国第一汽车集团公司 | Laser welding method for metal part by dual-wavelength dual laser beam |
| CN103182604A (en) * | 2013-03-12 | 2013-07-03 | 镭射谷科技(深圳)有限公司 | Laser hybrid welding method and system |
| CN105562930A (en) * | 2016-03-03 | 2016-05-11 | 武汉华工激光工程有限责任公司 | Laser welding method for power battery outer shell |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107127451A (en) * | 2017-05-12 | 2017-09-05 | 东莞市力星激光科技有限公司 | A kind of electrokinetic cell low energy consumption laser welding process |
| CN109093259A (en) * | 2017-06-21 | 2018-12-28 | 深圳市联赢激光股份有限公司 | A kind of compound wire feed welding method of dual wavelength |
| CN109967877A (en) * | 2017-12-25 | 2019-07-05 | 大族激光科技产业集团股份有限公司 | A kind of method for laser welding and system |
| CN108340073A (en) * | 2017-12-28 | 2018-07-31 | 上海君屹工业自动化股份有限公司 | A kind of battery modules aluminum alloy casing laser welding process |
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| Date | Code | Title | Description |
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| C06 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| CB03 | Change of inventor or designer information | ||
| CB03 | Change of inventor or designer information |
Inventor after: Zhou Hang Inventor after: Xu Huan Inventor after: Niu Zengqiang Inventor before: Zhou Hang Inventor before: Wang Qiao Inventor before: Niu Zengqiang |
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| RJ01 | Rejection of invention patent application after publication | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20161214 |