CN110449737A - A method of repairing housing of power cell and the fried point of top cover Laser Welding - Google Patents
A method of repairing housing of power cell and the fried point of top cover Laser Welding Download PDFInfo
- Publication number
- CN110449737A CN110449737A CN201910763855.2A CN201910763855A CN110449737A CN 110449737 A CN110449737 A CN 110449737A CN 201910763855 A CN201910763855 A CN 201910763855A CN 110449737 A CN110449737 A CN 110449737A
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- CN
- China
- Prior art keywords
- welding
- top cover
- mig
- repairing
- housing
- 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.)
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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
- B23K26/346—Working by laser beam, e.g. welding, cutting or boring in combination with welding or cutting covered by groups B23K5/00 - B23K25/00, e.g. in combination with resistance welding
- B23K26/348—Working by laser beam, e.g. welding, cutting or boring in combination with welding or cutting covered by groups B23K5/00 - B23K25/00, e.g. in combination with resistance welding in combination with arc heating, e.g. TIG [tungsten inert gas], MIG [metal inert gas] or plasma 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
- B23K26/60—Preliminary treatment
-
- 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
Abstract
The invention discloses a kind of method of the fried point of reparation housing of power cell and top cover Laser Welding, the method is first to clean to bombing site and remove surface oxide layer, after carrying out MIG welding repair welding and the extra repair welding material of removal later, then passes through the secondary repair welding of laser.By MIG welding technology, in weld seam pit that electrode material is melted to and filled battery core shell and top cover, the reparation to the fried point of laser welding is realized.Power battery is efficiently solved because the battery caused by shell and the fried point of top cover laser welding scraps situation.
Description
Technical field
The invention belongs to power battery technology fields, and in particular to a kind of reparation housing of power cell and top cover Laser Welding are fried
The method of point.
Background technique
Lithium ion battery is due to the spies such as its energy density is big, security performance is high, self-discharge performance is small and has extended cycle life
Point, is widely used in electronic equipment and electric car etc., is a kind of secondary energy sources of Novel clean, industry prospect is very
Extensively.
Currently, square lithium ion power battery encapsulates, using the laser welding of aluminum alloy casing cooperation top cover.Due to
The defect of the impurity and greasy dirt and laser welding process of Al-alloy casing itself, weld seam can be generated by causing in welding process fries
The case where point.Fried point can make material deficiency on weld seam and form pit or aperture, the voltage endurance capability of weld seam be reduced, so as to cause electricity
Core is scrapped.
It is therefore desirable to have a kind of can effectively solve this technical solution scrapped.
Summary of the invention
Present invention seek to address that the technical problems existing in the prior art.For this purpose, the present invention provides a kind of reparation power electric
The method of the fried point of pond shell and top cover Laser Welding, it is therefore an objective to convenient for being repaired at fried.
To achieve the goals above, the technical scheme adopted by the invention is as follows:
A method of housing of power cell and the fried point of top cover Laser Welding being repaired, the method is first to clean to bombing site
And surface oxide layer is removed, after carrying out MIG welding repair welding and the extra repair welding material of removal later, then pass through the secondary repair welding of laser.
Preferably, the method for the reparation housing of power cell and the fried point of top cover Laser Welding includes the following steps:
Step 1: removing bombing site impurity and surface oxide layer using the metal brush cleaning bombing site of electric grinder；
Step 2: using MIG bonding machine to bombing site repair welding, the pit of repair welding to fried point is completely filled with stopping；
Step 3: the excess stock that MIG welding is filled up is removed, keep flushing at MIG repair welding with adjacent weld seam；
Step 4: the battery core that processing is completed is put into laser welding apparatus, the secondary repair welding of laser is used.
Wherein, MIG welding is using being fusible welding wire as electrode, between the welding wire and welded piece that are continuously fed to
The electric arc of burning is as heat source, to melt welding wire and base metals.In welding process, protective gas (argon gas) passes through torch nozzle
It is delivered continuously to welding section, makes electric arc, molten bath and its neighbouring base metals from the illeffects of surrounding air.The weldering of fusing
Silk is transitioned into molten bath in the form of molten drop, is fused with the base metals of fusing, is formed weld metal after condensation.The present invention passes through
MIG welding technique realizes filling up for the fried pit generated to battery core shell and top cover laser using the electrode material of fusing,
Have the function that effectively to repair fried point.
The operating voltage of MIG welding machine described in step 2 is 20-40V, and operating current 40-60A, protection air-flow amount is 10-
30L/min。
The material for repairing that MIG repair welding uses in step 2 is 4 line aluminium alloys of the diameter in 0.2-2.0mm.
The excess stock of MIG repair welding is polished to and is flushed with adjacent weld seam using file and the electric head that rubs in step 3.
Laser weld parameters are power 900-1300W, speed 50-100mm/s, defocusing amount+0.5-+2mm in step 4.
The battery case is aluminium, titanium and its alloy and stainless steel.
Beneficial effects of the present invention:
1) it by MIG welding technology, in the weld seam pit that electrode material is melted to and filled battery core shell and top cover, realizes
The reparation of point fried to laser welding.Power battery is efficiently solved because of the battery report caused by shell and the fried point of top cover laser welding
Useless situation.
2) MIG bonding machine is low in cost relative to laser welding system, and flexible operation, easy to use.
3) heat input very little during MIG REPAIR WELDING, workpiece is not made battery core inside close to room temperature after the completion of welding
At damage.
Detailed description of the invention
This specification includes the following drawings, and shown content is respectively:
Fig. 1 is the schematic diagram of impurity and oxide layer at the fried point of present invention cleaning；
Fig. 2 is the schematic diagram that pit at solder joint is filled up in MIG welding of the present invention；
Fig. 3 is the schematic diagram that the present invention removes extra repair welding material using file；
Fig. 4 is the schematic diagram of the secondary repair welding of laser of the present invention.
Specific embodiment
Below against attached drawing, by the description of the embodiment, making to a specific embodiment of the invention further details of
Explanation, it is therefore an objective to those skilled in the art be helped to have more complete, accurate and deep reason to design of the invention, technical solution
Solution, and facilitate its implementation.It should be noted that term " on ", "lower", "front", "rear", "left", "right", "vertical", "inner",
The orientation or positional relationship of the instructions such as "outside" is to be based on the orientation or positional relationship shown in the drawings, and is merely for convenience of describing this hair
Bright and simplified description, rather than the device or element of indication or suggestion meaning must have a particular orientation, with specific orientation
Construction and operation, therefore should not be understood as the limitation to invention.
As shown in Figures 1 to 4, a method of repairing housing of power cell and the fried point of top cover Laser Welding, changing method is first
It cleans to bombing site and removes surface oxide layer, after carrying out MIG welding repair welding and the extra repair welding material of removal later, then pass through
The secondary repair welding of laser.Specifically comprise the following steps:
Step 1: removing bombing site impurity and surface oxide layer using the metal brush cleaning bombing site of electric grinder
(as shown in Figure 1)；
Step 2: using MIG bonding machine to bombing site repair welding, the pit of repair welding to fried point is completely filled with stopping (such as
Shown in Fig. 2)；
Step 3: the excess stock that MIG welding is filled up is removed, keep being flushed with adjacent weld seam at MIG repair welding (with file
The excess stock of MIG repair welding is polished to and flushes with adjacent weld seam by knife and the electric head that rubs, as shown in Figure 3)；
Step 4: the battery core that processing is completed is put into laser welding apparatus, the secondary repair welding of laser (as shown in Figure 4) is used.
It is described in detail below by specific preferred embodiment:
Embodiment 1
A method of battery core shell and the fried point of top cover laser welding being repaired, steps are as follows:
Step 1: as shown in Figure 1, using electric grinder metal hairbrush, clear up the impurity and surface film oxide at fried point；
Step 2: as shown in Fig. 2, using MIG welding to being filled reparation at fried.The MIG welding machine of setting works electric
Pressure is 30V, operating current 50A, protection air-flow 20L/min, and it is that aluminium welding wire progress MIG is repaired that selection diameter, which is the 4 of 1.2mm,
It is multiple, until pit is sufficiently filled up at fried point；
Step 3: as shown in figure 3, remove the excess stock that fried point place MIG is filled up using file, electric grinder, be polishing to and
Adjacent weld seam flushes；
Step 4: as shown in figure 4, MIG repair welding is got well and the battery core for completion of polishing is put into laser welding apparatus, with 1000W
Power, the speed of 50mm/s, the defocusing amount of+1mm carries out secondary laser welding.
Embodiment 2
A method of battery core shell and the fried point of top cover laser welding being repaired, steps are as follows:
Step 1: as shown in Figure 1, using electric grinder metal hairbrush, clear up the impurity and surface film oxide at fried point；
Step 2: as shown in Fig. 2, using MIG welding to being filled reparation at fried.The MIG welding machine of setting works electric
Pressure is 22V, operating current 44A, protection air-flow 25L/min, and it is that aluminium welding wire progress MIG is repaired that selection diameter, which is the 4 of 1.0mm,
It is multiple, until pit is sufficiently filled up at fried point；
Step 3: as shown in figure 3, remove the excess stock that fried point place MIG is filled up using file, electric grinder, be polishing to and
Adjacent weld seam flushes；
Step 4: as shown in figure 4, MIG repair welding is got well and the battery core for completion of polishing is put into laser welding apparatus, with 1200W
Power, the speed of 80mm/s, the defocusing amount of+1.5mm carries out secondary laser welding.
Comparative example 1
This comparative example is with embodiment 1 the difference lies in that the MIG weldering in step 2 is replaced with TIG weldering.
Comparative example 2
This comparative example is with embodiment 1 the difference lies in that the MIG weldering in step 2 is replaced with Laser Welding.
Comparative example 3
This comparative example and embodiment 1 the difference lies in that first carry out Laser Welding in restorative procedure, it is rear to carry out MIG weldering.
From the point of view of the effect after finally repairing at fried, embodiment 1 and embodiment 2 are able to achieve to the fried point of laser welding
It repairs, heat input very little during MIG REPAIR WELDING, workpiece does not cause to damage close to room temperature to battery core inside after the completion of welding
Wound.Fried repairing effect of comparative example 1, comparative example 2 and comparative example 3 is not so good as embodiment 1 and embodiment 2, and equal to battery core inside
There is different degrees of damage, it can be seen that, it, can using the method for first MIG postwelding Laser Welding in fried point repair process
Reach optimal repairing effect.
The present invention is exemplarily described in conjunction with attached drawing above.Obviously, present invention specific implementation is not by above-mentioned side
The limitation of formula.As long as using the improvement for the various unsubstantialities that the inventive concept and technical scheme of the present invention carry out；Or not
It is improved, above-mentioned conception and technical scheme of the invention are directly applied into other occasions, in protection scope of the present invention
Within.
Claims (8)
1. a kind of method for repairing housing of power cell and the fried point of top cover Laser Welding, which is characterized in that the method is first to fried
The removal of impurities of point position and removing surface oxide layer after carrying out MIG welding repair welding and the extra repair welding material of removal later, then pass through laser
Secondary repair welding.
2. the method for repairing housing of power cell and the fried point of top cover Laser Welding according to claim 1, which is characterized in that described
Method includes the following steps:
Step 1: removing bombing site impurity and surface oxide layer using the metal brush cleaning bombing site of electric grinder；
Step 2: using MIG bonding machine to bombing site repair welding, the pit of repair welding to fried point is completely filled with stopping；
Step 3: the excess stock that MIG welding is filled up is removed, keep flushing at MIG repair welding with adjacent weld seam；
Step 4: the battery core that processing is completed is put into laser welding apparatus, the secondary repair welding of laser is used.
3. the method for repairing housing of power cell and the fried point of top cover Laser Welding according to claim 2, which is characterized in that step
The operating voltage of MIG welding machine described in two is 20-40V, and operating current 40-60A, protection air-flow amount is 10-30L/min.
4. the method for repairing housing of power cell and the fried point of top cover Laser Welding according to claim 2, which is characterized in that step
The material for repairing that MIG repair welding uses in two is 4 line aluminium alloys of the diameter in 0.2-2.0mm.
5. the method for repairing housing of power cell and the fried point of top cover Laser Welding according to claim 2, which is characterized in that step
The excess stock of MIG repair welding is polished to and is flushed with adjacent weld seam using file and the electric head that rubs in three.
6. the method for repairing housing of power cell and the fried point of top cover Laser Welding according to claim 2, which is characterized in that step
Laser weld parameters are power 900-1300W, speed 50-100mm/s, defocusing amount+0.5-+2mm in four.
7. any one of -6 method for repairing housing of power cell and the fried point of top cover Laser Welding according to claim 1, feature
It is, the battery case is aluminium, titanium and its alloy and stainless steel.
8. any one of -6 method for repairing housing of power cell and the fried point of top cover Laser Welding according to claim 1, feature
It is, MIG welding is using being fusible welding wire as electrode, to burn between the welding wire and welded piece that are continuously fed to
Electric arc as heat source.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910763855.2A CN110449737A (en) | 2019-08-19 | 2019-08-19 | A method of repairing housing of power cell and the fried point of top cover Laser Welding |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910763855.2A CN110449737A (en) | 2019-08-19 | 2019-08-19 | A method of repairing housing of power cell and the fried point of top cover Laser Welding |
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| Publication Number | Publication Date |
|---|---|
| CN110449737A true CN110449737A (en) | 2019-11-15 |
Family
ID=68487493
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910763855.2A Pending CN110449737A (en) | 2019-08-19 | 2019-08-19 | A method of repairing housing of power cell and the fried point of top cover Laser Welding |
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| Country | Link |
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| CN (1) | CN110449737A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111037098A (en) * | 2019-12-27 | 2020-04-21 | 芜湖天弋能源科技有限公司 | Method for repairing various welding seam defects of laser welding of power battery sealing nail |
| CN112222618A (en) * | 2020-09-28 | 2021-01-15 | 上海飞博激光科技有限公司 | Laser welding method capable of reducing welding explosion points |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1042505A (en) * | 1988-11-09 | 1990-05-30 | 重庆大学 | Technology for laser renovating surface defect of castings |
| ES2045718T3 (en) * | 1989-11-29 | 1994-01-16 | Daimler Benz Ag | PROCEDURE FOR THE MANUFACTURE OF HOLLOW GAS SELECTOR VALVES FOR ALTERNATIVE PISTON MACHINES. |
| JPH06254689A (en) * | 1993-03-05 | 1994-09-13 | Kawasaki Steel Corp | Laser beam welding method for beltlike metals |
| CN101072655A (en) * | 2004-12-15 | 2007-11-14 | 弗罗纽斯国际有限公司 | Method and device for combined laser-arc welding with control of laser unit according to welding torch |
| CN104313600A (en) * | 2014-09-28 | 2015-01-28 | 燕山大学 | Continuous point type forging and stamping laser forming repairing method for damaged titanium alloy forged piece |
| CN105312743A (en) * | 2015-10-30 | 2016-02-10 | 长治清华机械厂 | On-site repair welding method for 5A06 aluminum barrel finished product welding joint stress corrosion crack |
-
2019
- 2019-08-19 CN CN201910763855.2A patent/CN110449737A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1042505A (en) * | 1988-11-09 | 1990-05-30 | 重庆大学 | Technology for laser renovating surface defect of castings |
| ES2045718T3 (en) * | 1989-11-29 | 1994-01-16 | Daimler Benz Ag | PROCEDURE FOR THE MANUFACTURE OF HOLLOW GAS SELECTOR VALVES FOR ALTERNATIVE PISTON MACHINES. |
| JPH06254689A (en) * | 1993-03-05 | 1994-09-13 | Kawasaki Steel Corp | Laser beam welding method for beltlike metals |
| CN101072655A (en) * | 2004-12-15 | 2007-11-14 | 弗罗纽斯国际有限公司 | Method and device for combined laser-arc welding with control of laser unit according to welding torch |
| CN104313600A (en) * | 2014-09-28 | 2015-01-28 | 燕山大学 | Continuous point type forging and stamping laser forming repairing method for damaged titanium alloy forged piece |
| CN105312743A (en) * | 2015-10-30 | 2016-02-10 | 长治清华机械厂 | On-site repair welding method for 5A06 aluminum barrel finished product welding joint stress corrosion crack |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111037098A (en) * | 2019-12-27 | 2020-04-21 | 芜湖天弋能源科技有限公司 | Method for repairing various welding seam defects of laser welding of power battery sealing nail |
| CN112222618A (en) * | 2020-09-28 | 2021-01-15 | 上海飞博激光科技有限公司 | Laser welding method capable of reducing welding explosion points |
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Application publication date: 20191115 |