CN107297570A - A kind of cylindrical battery negative pole and connection sheet welding method - Google Patents
A kind of cylindrical battery negative pole and connection sheet welding method Download PDFInfo
- Publication number
- CN107297570A CN107297570A CN201710516946.7A CN201710516946A CN107297570A CN 107297570 A CN107297570 A CN 107297570A CN 201710516946 A CN201710516946 A CN 201710516946A CN 107297570 A CN107297570 A CN 107297570A
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- China
- Prior art keywords
- welding
- negative pole
- connection sheet
- cylindrical battery
- nanosecond
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Classifications
-
- 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
- B23K26/32—Bonding taking account of the properties of the material involved
- B23K26/323—Bonding taking account of the properties of the material involved involving parts made of dissimilar metallic material
-
- 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
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- Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Engineering & Computer Science (AREA)
- Plasma & Fusion (AREA)
- Mechanical Engineering (AREA)
- Laser Beam Processing (AREA)
- Connection Of Batteries Or Terminals (AREA)
Abstract
The present invention proposes a kind of cylindrical battery negative pole and connection sheet welding method, comprises the following steps：Cylindrical battery negative pole is set to be brought into close contact with connection sheet；And in multiple setting positions, the laser beam provided using nanosecond laser carries out impact welding, and welding track is using vibration ray mode.Welding stability and conductive capability can be effectively improved, it is to avoid the bad defect such as rosin joint, negative pole burn-through.
Description
Technical field
The present invention relates to the laser processing of laser processing, more particularly to cylindrical battery.
Background technology
At present, cylindrical battery case is typically using stainless steel thick 0.2mm~0.25mm, and negative straps material is general
Stainless steel is not used, but uses the thick nickel sheet of 0.2mm~0.3mm, because nickel sheet or the laser welding of plating nickel material
Energy is more preferably and nickel sheet resistivity is relatively low.For the welding of foreign material, it can be obtained more preferably using the higher nanosecond laser of frequency
Welding effect.
The welding light source of cylindrical battery typically uses pulse laser, and external galvanometer scanning system is used as output device.
General to use galvanometer spot welding pattern, one cell negative pole of welding about needs 0.5 second or so, but because pulse laser is present
In energy attenuation phenomenon, production that to there is rosin joint, weld penetration inconsistent and cause the risk of negative pole burn-through leakage.
The content of the invention
The technical problem to be solved in the present invention is, for the drawbacks described above of prior art, proposes a kind of cylindrical battery
Negative pole and connection sheet welding method, can effectively improve welding stability and conductive capability, it is to avoid rosin joint, negative pole burn-through etc. are no
Good defect.
The technical solution adopted for the present invention to solve the technical problems is：A kind of cylindrical battery negative pole and connection sheet are provided
Welding method, comprises the following steps：The negative pole and connection sheet for making cylindrical battery are brought into close contact；And in multiple setting positions,
The laser beam provided using nanosecond laser carries out impact welding, and welding track is using vibration ray mode.
Wherein, the parameter of the oscillating line of welding track is set to：Initial radium R1=0.02mm, spiral increment b=
0.02mm, final diameter is set to 2mm~3mm.
Wherein, the number of setting position is three.
Wherein, the gap that described negative pole and connection sheet are brought into close contact between finger negative pole and the plate of connection sheet two is less than single plate
The 10% of thickness.
Wherein, described nanosecond laser refers to using the other optical fiber laser of nanosecond as welding light source, using galvanometer
Head is used as HSO High Speed Output.
Wherein, the described lens focus that shakes is 254mm or 160mm.
Wherein, described negative pole is stainless steel of the thickness in 0.2mm~0.25mm, and described connection sheet is thickness gauge
The very little nickel sheet in 0.2mm~0.3mm.
Wherein, the parameter of described nanosecond laser is：Maximum single-point energy is 1mJ, and peak frequency is 2000KHz, single
Point maximum peak power is up to 13KW.
Wherein, the parameter of described impact welding is：No. 0 waveform, pulse frequency is set to 200KHz, speed of welding scope
100mm/s~300mm/s, defocusing amount+2mm.
Wherein, No. 0 described waveform, reaches output peak power, then power output is gradually reduced, and is arrived at 70 nanoseconds
Power output drops to zero during 250 nanosecond.
The beneficial effects of the present invention are the laser beam provided by using nanosecond laser carries out impact welding, welding
Track is using vibration ray mode, it is possible to prevente effectively from the weld defect such as rosin joint, quick-fried point, connection sheet and negative pole temperature distortion, increase
Area of passage, the advantages of greatly improve welding stability.
Brief description of the drawings
Below in conjunction with drawings and Examples, the invention will be further described, in accompanying drawing：
Fig. 1 is the schematic perspective view of welding of the embodiment of the present invention；
Fig. 2 is to weld No. 0 oscillogram that negative pole is used with connection sheet using nanosecond optical fiber laser galvanometer；
Fig. 3 is the schematic top plan view of welding of the embodiment of the present invention；
Fig. 4 is welding effect figure provided in an embodiment of the present invention；
Fig. 5 is the schematic flow sheet of welding method of the embodiment of the present invention.
Wherein, Main Reference Numerals are as follows：The laser beam of 10 negative pole, 20 connection sheet, 30 solder joint 50.
Embodiment
In conjunction with accompanying drawing, presently preferred embodiments of the present invention is elaborated.
Referring to Fig. 1 to Fig. 3, Fig. 1 is the schematic perspective view of welding of the embodiment of the present invention；Fig. 2 is swashed using nanosecond optical fiber
Light device galvanometer welds No. 0 oscillogram that negative pole is used with connection sheet；Fig. 3 is the schematic top plan view of welding of the embodiment of the present invention.This
Invention proposes a kind of negative pole 10 and the method for the laser welding of connection sheet 20, this method by taking the cylindrical battery of 18650 models as an example
Mainly include：Firstth, using the other optical fiber laser of nanosecond as welding light source, focal length is 254mm or 160mm galvanometer head
It is used as HSO High Speed Output；Secondth, the welding track of laser beam 50 can control the size of solder joint 30 using vibration ray mode；The
3rd, welding condition can prevent connection from higher frequency, higher speed heat transfer impact welding GND 10
Piece 20 is deformed.
Specifically, negative pole 10 is stainless steel of the thickness in 0.2mm~0.25mm, and connection sheet 20 is that thickness exists
0.2mm~0.3mm nickel sheet.The number of solder joint 30 is three, that is to say, that connected by three solder joints 30, it is ensured that negative
There are enough bonding strengths pole 10 with connection sheet 20.
Referring to Fig. 4, Fig. 4 is welding effect figure provided in an embodiment of the present invention.From the section that Fig. 4 is illustrated, weldering
Point 30 is rendered as penetrating the comb structure of the joint face of connecting plate 20 and negative pole 10, can effectively increase area of passage, welds
Efficiency is higher, and face of weld quality is preferable, and welding stability is greatly improved.
Referring to Fig. 5, Fig. 5 is the schematic flow sheet of welding method of the embodiment of the present invention.The flow of the inventive method is substantially wrapped
Include procedure below：
Step S501, negative pole 10 and the connection sheet 20 for making cylindrical battery are brought into close contact.
Step S503, multiple setting positions (each setting position is corresponding with a solder joint 30), using nanosecond laser
The laser beam 50 that device is provided carries out impact welding, and welding track is using vibration ray mode.
Specifically, include with reference to referring to Fig. 1, step S501：Ensure negative pole 10, the table of connection sheet 20 of cylindrical battery
Face flat smooth, neat and tidy (alcohol wipe surface can be used, remove the chip etc. that degreases)；Cylindrical battery is previously placed in
In professional fixture (not shown), it is ensured that the negative pole 10 of cylindrical battery is brought into close contact with connection sheet 20；Then, clamp,
Seek the parallel clamping of 20 liang of plates of negative pole 10 and connection sheet, and the gap after clamping between 20 liang of plates of negative pole 10 and connection sheet be less than it is single
The 10% of plate (connection sheet 20 of negative pole 10/) thickness.
With reference to being provided with referring to Fig. 2 and Fig. 3, step S503 welding condition being related to：The nanosecond laser of use
Parameter be：Maximum single-point energy is 1mJ, and peak frequency is 2000KHz, and single-point maximum peak power is up to 13KW；Using arteries and veins
Frequency of leaping high impacts bond pattern, and design parameter is：No. 0 waveform (reaches output peak power, then output work at 70 nanoseconds
Rate is gradually reduced, and is dropped to zero) to power output during 250 nanosecond, and pulse frequency is set to 200KHz, speed of welding scope 100mm/s
~300mm/s, defocusing amount+2mm；The parameter of the oscillating line of welding track (i.e. contour line of the solder joint 30 on the surface of connection sheet 20)
It is set to：Initial radium R1=0.02mm, spiral increment b=0.02mm, final diameter is set to 2mm~3mm.
The beneficial effects of the present invention are the laser beam provided by using nanosecond laser carries out impact welding, welding
Track uses vibration ray mode, it is possible to prevente effectively from the weld defect such as rosin joint, quick-fried point, connection sheet 20 and the temperature distortion of negative pole 10,
The advantages of increasing area of passage, greatly improve welding stability.
It should be appreciated that the above embodiments are merely illustrative of the technical solutions of the present invention, rather than its limitations, to ability
For field technique personnel, the technical scheme described in above-described embodiment can be modified, or it is special to which part technology
Levy carry out equivalent substitution；And these modifications and replacement, it should all belong to the protection domain of appended claims of the present invention.
Claims (10)
1. a kind of cylindrical battery negative pole and connection sheet welding method, it is characterised in that comprise the following steps：
The negative pole and connection sheet for making cylindrical battery are brought into close contact；And
In multiple setting positions, the laser beam provided using nanosecond laser carries out impact welding, and welding track uses oscillating line
Pattern.
2. according to the method described in claim 1, it is characterised in that：The parameter of the oscillating line of welding track is set to：Initial half
Footpath R1=0.02mm, spiral increment b=0.02mm, final diameter is set to 2mm~3mm.
3. according to the method described in claim 1, it is characterised in that：The number of setting position is three.
4. according to the method described in claim 1, it is characterised in that：Described negative pole is brought into close contact finger negative pole and company with connection sheet
Gap between the plate of contact pin two is less than the 10% of single plate thickness.
5. according to the method described in claim 1, it is characterised in that：Described nanosecond laser refers to using the other optical fiber of nanosecond
Laser is used as HSO High Speed Output as welding light source using galvanometer head.
6. method according to claim 5, it is characterised in that：The described lens focus that shakes is 254mm or 160mm.
7. according to the method described in claim 1, it is characterised in that：Described negative pole is thickness in 0.2mm~0.25mm
Stainless steel, described connection sheet for thickness 0.2mm~0.3mm nickel sheet.
8. the method according to any one of claim 1 to 7, it is characterised in that：The parameter of described nanosecond laser is：Most
Big single-point energy is 1mJ, and peak frequency is 2000KHz, and single-point maximum peak power is up to 13KW.
9. the method according to any one of claim 1 to 7, it is characterised in that：The parameter of described impact welding is：No. 0
Waveform, pulse frequency is set to 200KHz, speed of welding scope 100mm/s~300mm/s, defocusing amount+2mm.
10. method according to claim 9, it is characterised in that：No. 0 described waveform, reaches output peak at 70 nanoseconds
It is worth power, then power output is gradually reduced, and zero is dropped to power output during 250 nanosecond.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710516946.7A CN107297570A (en) | 2017-06-29 | 2017-06-29 | A kind of cylindrical battery negative pole and connection sheet welding method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710516946.7A CN107297570A (en) | 2017-06-29 | 2017-06-29 | A kind of cylindrical battery negative pole and connection sheet welding method |
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| Publication Number | Publication Date |
|---|---|
| CN107297570A true CN107297570A (en) | 2017-10-27 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201710516946.7A Pending CN107297570A (en) | 2017-06-29 | 2017-06-29 | A kind of cylindrical battery negative pole and connection sheet welding method |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108336285A (en) * | 2017-12-26 | 2018-07-27 | 合肥国轩高科动力能源有限公司 | Laser welding method for power battery with non-coincident head and tail |
| CN108465933A (en) * | 2018-02-13 | 2018-08-31 | 深圳吉阳智能科技有限公司 | A kind of method and apparatus of laser welding foil and lug |
| CN108857067A (en) * | 2018-07-25 | 2018-11-23 | 大连中比动力电池有限公司 | A kind of cylindrical steel case lithium ion battery point back welding device and point back welding method |
| CN110899977A (en) * | 2018-08-28 | 2020-03-24 | 大族激光科技产业集团股份有限公司 | Method for improving mechanical property of copper-aluminum alloy welding force |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108336285A (en) * | 2017-12-26 | 2018-07-27 | 合肥国轩高科动力能源有限公司 | Laser welding method for power battery with non-coincident head and tail |
| CN108465933A (en) * | 2018-02-13 | 2018-08-31 | 深圳吉阳智能科技有限公司 | A kind of method and apparatus of laser welding foil and lug |
| CN108857067A (en) * | 2018-07-25 | 2018-11-23 | 大连中比动力电池有限公司 | A kind of cylindrical steel case lithium ion battery point back welding device and point back welding method |
| CN108857067B (en) * | 2018-07-25 | 2023-11-10 | 大连中比动力电池有限公司 | Point bottom welding device and point bottom welding method for cylindrical steel shell lithium ion battery |
| CN110899977A (en) * | 2018-08-28 | 2020-03-24 | 大族激光科技产业集团股份有限公司 | Method for improving mechanical property of copper-aluminum alloy welding force |
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Application publication date: 20171027 |
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| RJ01 | Rejection of invention patent application after publication |