CN107876979A - A kind of power lithium-ion battery liquid injection port seals method for laser welding - Google Patents
A kind of power lithium-ion battery liquid injection port seals method for laser welding Download PDFInfo
- Publication number
- CN107876979A CN107876979A CN201710979832.6A CN201710979832A CN107876979A CN 107876979 A CN107876979 A CN 107876979A CN 201710979832 A CN201710979832 A CN 201710979832A CN 107876979 A CN107876979 A CN 107876979A
- Authority
- CN
- China
- Prior art keywords
- laser
- injection port
- liquid injection
- ion battery
- welding
- 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
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
- B23K26/206—Laser sealing
-
- 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
- B23K26/70—Auxiliary operations or equipment
- B23K26/702—Auxiliary equipment
-
- 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
- H01M50/60—Arrangements or processes for filling or topping-up with liquids; Arrangements or processes for draining liquids from casings
- H01M50/609—Arrangements or processes for filling with liquid, e.g. electrolytes
- H01M50/627—Filling ports
- H01M50/636—Closing or sealing filling ports, e.g. using lids
-
- 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
- H01M50/60—Arrangements or processes for filling or topping-up with liquids; Arrangements or processes for draining liquids from casings
- H01M50/691—Arrangements or processes for draining liquids from casings; Cleaning battery or cell casings
-
- 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
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- Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Engineering & Computer Science (AREA)
- Plasma & Fusion (AREA)
- Mechanical Engineering (AREA)
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Sealing Battery Cases Or Jackets (AREA)
- Laser Beam Processing (AREA)
Abstract
The invention discloses a kind of power lithium-ion battery liquid injection port to seal method for laser welding, the position beginning and end of laser-beam welding machine welding track being arranged on beyond laser welded seam.Advantages of the present invention：Prevent the phenomenon that the unstable caused laser welded seam of laser-beam welding machine energy when going out laser and closing laser fries hole leakage, ensure that the intersection of beginning and end very overlaps, and improves sealing in the lump；The position that beginning and end need to only fall beyond laser welded seam can be, it is necessary to which the position of accurate starting point and terminal, the laser welded seam distance that beginning and end arrives be simple to operate without accurate.
Description
Technical field
The present invention relates to a kind of power lithium-ion battery liquid injection port to seal method for laser welding, belongs to lithium battery technology neck
Domain.
Background technology
With the continuous progress of lithium-ion-power cell technology, the lithium ion battery of metal shell increasingly turns into main flow, gold
Belong to the advantages of housing battery is due to high stability, high security, wide small volume and tolerable temperature scope, it is commercially
Occupation rate constantly rises.Lithium battery in the fabrication process, when into battery container inject electrolyte after, due to electrolyte to be maintained
Stability and need to be sealed the liquid injection port of battery container, at present generally using being laser welded seal, this kind of technology
Efficiency high, good sealing effect, prior art are first to determine the track of weld seam, select some point on weld seam to be used as starting point, swash
Light rotates a circle around starting point and reached home, and terminal and starting point overlap, but laser-beam welding machine energy when going out laser and closing laser
Measure unstable, fried hole leakage can be caused, therefore the welding of terminal and starting point is unstable, beginning and end on soldered,
Weld can be caused laser penetration housing or the complete situation of welded seal occur, it is also possible to the friendship of beginning and end occur
Do not overlapped also at boundary, the situation that laser turns off, liquid injection port sealing is undesirable, the phenomenon of leakage occurs.
Chinese patent CN104772567B, discloses the method for laser welding for reducing the starting the arc and receiving arc defect, and this method is
At starting the arc end and receive arc end and change interaction angle between laser and mother metal, to regulate and control molten bath and aperture in welding process
Form, so as to solve the problems, such as easily to produce defect at starting the arc end and receipts arc end during fusion welding, avoid in starting the arc end and receipts
There is the unstable of laser beam welding in arc end, reaches the purpose for improving laser welding reliability, although this kind of method has
Certain effect, but want accurate starting the arc end and receive arc end position, and original incident direction, oblique incidence direction, receipts arc incidence
Direction, the requirement to purification bonding machine is higher, and intermediate demand translation-angle, practical operation are got up relatively difficult.
The content of the invention
The technical problem to be solved in the present invention, be to provide a kind of intersection for ensureing beginning and end very overlap,
Sealing is strong, it is simple to operate, seal laser welding side without the power lithium-ion battery liquid injection port in accurate starting point and final position
Method.
The present invention is realized by following proposal：A kind of power lithium-ion battery liquid injection port seals method for laser welding, will swash
The beginning and end of photocoagulator welding track is arranged on the position beyond laser welded seam.
By welding program the position beginning and end of laser-beam welding machine welding track being arranged on beyond laser welded seam.
The welding track is made up of laser welded seam, changeover portion and breeze way, and changeover portion is starting point between laser welded seam
Track, buffering section laser welded seam is to the track between terminal.
The intersection of the changeover portion and breeze way is some point fallen on laser welded seam.
The changeover portion and breeze way are linear or arc.
The changeover portion and breeze way are the tangent line of laser welded seam.
The laser welded seam falls between sealing valve block and battery container, and beginning and end falls the electricity beyond laser welded seam
On the housing of pond.
Liquid injection port is cleaned using laser marking machine before power lithium-ion battery liquid injection port seals laser welding, swashed
The laser that light marking machine is sent is as follows according to the circle of laser index carving cleaning track movement one, cleaning in the surrounding of liquid injection port：
Step 1, on laser marking machine CCD is installed and taken pictures detecting system；
Step 2, by CCD take pictures detecting system Automatic-searching liquid injection port and determine laser index carving clean track；
Step 3, the surface whole marking cleaning at laser welded seal position, crystallization electrolyte, foreign matter will be needed by going out laser automatically
And surface oxide layer vaporization at high temperature during laser index carving, then taken away by smoke discharging dust removing system；
Step 4, enters the lower section of laser-beam welding machine after step 3 cleaning by streamline, and automatic sealing valve block of placing is carried out
Laser welding.
Beneficial effects of the present invention are：
1st, a kind of power lithium-ion battery liquid injection port of present invention sealing method for laser welding by laser-beam welding machine welding track
Beginning and end is arranged on the position beyond weld seam, and preventing laser-beam welding machine, energy is unstable causes when going out laser and closing laser
Laser welded seam fry hole leakage phenomenon, in the lump ensure beginning and end intersection very overlap, improve sealing；
2nd, a kind of beginning and end of power lithium-ion battery liquid injection port sealing method for laser welding of the present invention need to only fall in laser
Position beyond weld seam can be, it is necessary to which the position of accurate starting point and terminal, the laser welded seam distance that beginning and end arrives be without essence
Really, it is simple to operate.
Brief description of the drawings
Fig. 1 is a kind of welding track signal that a kind of power lithium-ion battery liquid injection port of the present invention seals method for laser welding
Figure.
Fig. 2 is that a kind of another welding track of power lithium-ion battery liquid injection port sealing method for laser welding of the present invention shows
It is intended to.
Fig. 3 is the welding track schematic diagram in background information.
In figure：1 is starting point, and 2 be terminal, and 3 be laser welded seam, and 4 be changeover portion, and 5 be breeze way, and 6 be sealing valve block, and 7 are
Battery container.
Embodiment
With reference to Fig. 1-3, the present invention is further described, but the scope of the present invention does not limit to the content.
Wherein identical parts are presented with like reference characters.It should be noted that the word used below in description
Language "front", "rear", "left", "right", "up" and "down" refer to the direction in accompanying drawing, and word " interior " and " outer " refer respectively to court
To or away from particular elements geometric centers direction, and accompanying drawing is compared using very simplified form and accurately using non-
Rate, only for the purpose of facilitating and clarifying the purpose of the embodiments of the invention.
For clarity, not describing whole features of practical embodiments, in the following description, known function is not described in detail
And structure, because they can make the present invention chaotic due to unnecessary details, it will be understood that opening in any practical embodiments
In hair, it is necessary to a large amount of implementation details are made to realize the specific objective of developer, such as according to relevant system or relevant business
Limitation, another embodiment is changed into by one embodiment, additionally, it should think that this development is probably complicated and expended
Time, but it is only to those skilled in the art routine work.
A kind of power lithium-ion battery liquid injection port seals method for laser welding, by the starting point 1 of laser-beam welding machine welding track
The position beyond laser welded seam 3 is arranged on terminal 2.
By welding program the position starting point 1 of laser-beam welding machine welding track and terminal 2 being arranged on beyond laser welded seam 3
Put.
Welding track is made up of laser welded seam 3, changeover portion 4 and breeze way 5, changeover portion 4 be starting point 1 to laser welded seam 3 it
Between track, 5 laser welded seams 3 of breeze way arrive terminal 2 between track.
The intersection of changeover portion 4 and breeze way 5 is some point fallen on laser welded seam 3.
Changeover portion 4 and breeze way 5 are linear or arc.
Changeover portion 4 and the tangent line that breeze way 5 is laser welded seam 3.
Laser welded seam 3 falls between sealing valve block 6 and battery container 7, and starting point 1 and terminal 2 fall beyond laser welded seam 3
On battery container 7.
Liquid injection port is cleaned using laser marking machine before power lithium-ion battery liquid injection port seals laser welding, swashed
The laser that light marking machine is sent is as follows according to the circle of laser index carving cleaning track movement one, cleaning in the surrounding of liquid injection port：
Step 1, on laser marking machine CCD is installed and taken pictures detecting system；
Step 2, by CCD take pictures detecting system Automatic-searching liquid injection port and determine laser index carving clean track；
Step 3, the surface whole marking cleaning at laser welded seal position, crystallization electrolyte, foreign matter will be needed by going out laser automatically
And surface oxide layer vaporization at high temperature during laser index carving, then taken away by smoke discharging dust removing system；
Step 4, enters the lower section of laser-beam welding machine after step 3 cleaning by streamline, and automatic sealing valve block 6 of placing is carried out
Laser welding.
Although more detailed elaboration is done to technical scheme and has been enumerated, it will be appreciated that for ability
For field technique personnel, modification is made to above-described embodiment or uses equivalent alternative solution, this is to those skilled in the art
It is it is clear that these modifications or improvements without departing from theon the basis of the spirit of the present invention, belong to the present invention for member
Claimed scope.
Claims (8)
1. a kind of power lithium-ion battery liquid injection port seals method for laser welding, it is characterised in that：Laser-beam welding machine is welded into rail
The starting point of mark（1）And terminal（2）It is arranged on laser welded seam（3）Position in addition.
A kind of 2. power lithium-ion battery liquid injection port sealing method for laser welding according to claim 1, it is characterised in that：
By welding programming by the starting point of laser-beam welding machine welding track（1）And terminal（2）It is arranged on laser welded seam（3）Position in addition
Put.
A kind of 3. power lithium-ion battery liquid injection port sealing method for laser welding according to claim 2, it is characterised in that：
The welding track is by laser welded seam（3）, changeover portion（4）And breeze way（5）Composition, changeover portion（4）For starting point（1）To Laser Welding
Seam（3）Between track, breeze way（5）Position laser welded seam（3）To terminal（2）Between track.
A kind of 4. power lithium-ion battery liquid injection port sealing method for laser welding according to claim 3, it is characterised in that：
The changeover portion（4）With breeze way（5）Intersection be to fall in laser welded seam（3）On some point.
A kind of 5. power lithium-ion battery liquid injection port sealing method for laser welding according to claim 3, it is characterised in that：
The changeover portion（4）And breeze way（5）For linear or arc.
A kind of 6. power lithium-ion battery liquid injection port sealing method for laser welding according to claim 3, it is characterised in that：
The changeover portion（4）And breeze way（5）For laser welded seam（3）Tangent line.
A kind of 7. power lithium-ion battery liquid injection port sealing method for laser welding according to claim 3, it is characterised in that：
The laser welded seam（3）Fall in sealing valve block（6）And battery container（7）Between, starting point（1）And terminal（2）Fall in laser welded seam
（3）Battery container in addition（7）On.
A kind of 8. power lithium-ion battery liquid injection port sealing method for laser welding according to claim 1, it is characterised in that：
Liquid injection port is cleaned using laser marking machine before power lithium-ion battery liquid injection port seals laser welding, laser marking machine
The laser sent is as follows according to the circle of laser index carving cleaning track movement one, cleaning in the surrounding of liquid injection port：
Step 1, on laser marking machine CCD is installed and taken pictures detecting system；
Step 2, by CCD take pictures detecting system Automatic-searching liquid injection port and determine laser index carving clean track；
Step 3, the surface whole marking cleaning at laser welded seal position, crystallization electrolyte, foreign matter will be needed by going out laser automatically
And surface oxide layer vaporization at high temperature during laser index carving, then taken away by smoke discharging dust removing system；
Step 4, enter the lower section of laser-beam welding machine by streamline after step 3 cleaning, it is automatic to place sealing valve block（6）Enter
Row laser welding.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710979832.6A CN107876979A (en) | 2017-10-19 | 2017-10-19 | A kind of power lithium-ion battery liquid injection port seals method for laser welding |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710979832.6A CN107876979A (en) | 2017-10-19 | 2017-10-19 | A kind of power lithium-ion battery liquid injection port seals method for laser welding |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN107876979A true CN107876979A (en) | 2018-04-06 |
Family
ID=61782016
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710979832.6A Pending CN107876979A (en) | 2017-10-19 | 2017-10-19 | A kind of power lithium-ion battery liquid injection port seals method for laser welding |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN107876979A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111813042A (en) * | 2020-06-28 | 2020-10-23 | 西安中科微精光子制造科技有限公司 | Laser processing control method and device and computer storage medium |
| EP4343958A1 (en) * | 2022-09-23 | 2024-03-27 | CALB Co., Ltd. | Battery and manufacturing method of battery |
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| CN106624359A (en) * | 2016-12-20 | 2017-05-10 | 柳州振业焊接机电设备制造有限公司 | Lithium ion battery laser welding system |
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| JP2002042742A (en) * | 2000-07-31 | 2002-02-08 | Toyota Central Res & Dev Lab Inc | Manufacturing method of sealed battery |
| JP2005106527A (en) * | 2003-09-29 | 2005-04-21 | Toyoda Mach Works Ltd | Pressure sensor and its manufacturing method |
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Application publication date: 20180406 |