CN208628649U - Laser galvanometer scanning protection-gas welding apparatus for battery case encapsulation - Google Patents
Laser galvanometer scanning protection-gas welding apparatus for battery case encapsulation Download PDFInfo
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- CN208628649U CN208628649U CN201820586156.6U CN201820586156U CN208628649U CN 208628649 U CN208628649 U CN 208628649U CN 201820586156 U CN201820586156 U CN 201820586156U CN 208628649 U CN208628649 U CN 208628649U
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Abstract
The utility model discloses the laser galvanometer scanning protection-gas welding apparatus encapsulated for battery case, it include: one group of battery case, for fixing the fixture and protection-gas welding apparatus of battery case, one group of gas curtain body and gas supply assembly are equipped in protection-gas welding apparatus, gas curtain body is set to the inside of fixture, and the gas curtain body is equipped with air inlet pipe fitting, gas supply assembly is connect with air inlet pipe fitting, inlet air flow channel and compressed air stream injection channel are equipped in gas curtain body, compressed air stream injection channel passes through gas curtain body upper side and extends, gas curtain body upper side is equipped with one group of gas port being connected to compressed air stream injection channel, gas curtain body upper side is connect with cover board, being formed, there is the compression of defencive function to protect the side-blown channel of air guide.The gas-tpe fitting of the utility model protection device of air can connect protection tracheae, and the flow that gas curtain body introduces is big, and the gas flow after the compression of compressed air stream injection channel, accelerating is big, and air pressure is strong, and effective protection molten bath avoids workpiece in welding process from aoxidizing.
Description
Technical field
The utility model belongs to battery manufacturing field, in particular to a kind of laser galvanometer scanning weldering for battery case encapsulation
Connect protection device of air.
Background technique
New-energy electric vehicle is with lithium battery compared with traditional lead-acid battery, nickel-metal hydride battery, and specific energy is high, specific power
Greatly, Yi Shixian quick charge and deep discharge, the service life is long, is the main direction of development of current driving force battery.Lithium ion power electricity
Three kinds of basic configurations of pond battery core are cylinder takeup type, rectangular stacked and rectangular takeup type, correspond respectively to column battery, soft
Packet battery, rectangular cell.Rectangular takeup type combines rectangular stacked external appearance characteristic and the coiled pole plate production side of cylinder
Method has the advantages that space utilization rate height, high production efficiency, packing forms mainly use hard shell mode, and material mainly has steel
Shell and aluminum hull, according to the arrangement mode of positive/negative plate inside square configuration, which is rectangular.Using rectangular coiling, side
Shape shell mode, thermal diffusivity is good, in groups easily design, high reliablity, contain that explosion-proof valve is safer, high rigidity.
Electrical core of power battery case material mostly uses aluminium alloy, and optimal selection continuous laser welds mode, to reduce crackle
Sensibility.In laser beam welding, the input of laser beam high power density, so that welded piece material surface is locally violent
Evaporation gasification forms metal vapors, metal vapors further occur under high power density laser effect ionization formed it is photic it is equal from
Daughter is distributed in inside and outside keyhole.Metal vapors outside hole, photo plasma for incident laser beam generate scattering, reflection and
The attenuations such as defocus generate screen effect to incident laser, influence in laser galvanometer scanning welding process material to laser energy
The absorption of amount and the stability of laser beam welding, or even will cause the interruption of welding process, so that the fusion penetration of weld seam is influenced,
The Weld Performances such as the generation of stomata and the ingredient tissue of weld seam are caused to change.
Generally, to avoid flue dust and plasma from weakening the energy on laser projection to workpiece surface, using by
Install additional by laser spot concentrate gas blow pipe, with inert gas be protection gas scheme, this scheme fixes and short in laser spot
Be easily achieved in focal length welding technique, and better effects can be obtained, however, laser is long-range, in vibration mirror scanning welding technique, it is burnt
Point or focal length may not be it is fixed, can be focused by moveable focus lamp, pass through object lens amplify focus lamp tune
Section effect, focus be in axial direction or three-dimensional space it is variable, therefore, protection gas blowout loophole position be difficult to follow laser spot position
It sets and changes.
In the remote focal length welding technique of existing conventional laser, one on laser galvanometer remote welding head and variable focal length plumb joint
As be not provided with protection system to weld seam, do not blow protection gas, Laser Welding Quality and welding effect in the welding process
Rate is lower, and it is even more serious that the flue dust and plasma generated in welding process flies upward phenomenon, in this way, so that welding procedure
It is easy to appear welding defect, the bad product rate of battery core battery case greatly promotes.
Therefore, it is necessary to install dedicated scavenger system in the clamping tooling structure of workpiece, according to lithium ion battery box
Structure feature designs and develops compact gas blowing device is effectively protected.Currently, generalling use injecting protective gas mainly and having and is side-blown
Formula and coaxial-type, protective gas can be He, Ar, N2 either CO2, and using pure helium as protection gas, beam energy is not obstructed
Go directly workpiece surface with hindering, available larger fusion penetration, but its molecular weight is smaller, needs biggish flow velocity, to ensure effectively
By the metallic vapour discharge in laser beam path, most effective protective gas, but a large amount of uses are used when this is laser welding
Pure helium price is more expensive, increases production cost.
Utility model content
Purpose of utility model: in order to overcome the above deficiency, the purpose of the utility model is to provide one kind to seal for battery case
The laser galvanometer scanning protection-gas welding apparatus of dress, structure is simple, and rationally, effective protection molten bath avoids in welding process for design
Workpiece oxidation；The plasma shielding of High Power Laser Welding generation can be dispersed simultaneously.
Technical solution: to achieve the goals above, the utility model provides a kind of laser vibration for battery case encapsulation
Scarnning mirror protection-gas welding apparatus, comprising: one group of battery case, fixture and protection-gas welding apparatus for fixing battery case,
In, one group of gas curtain body and gas supply assembly are equipped in the protection-gas welding apparatus, the gas curtain body is set to the inside of fixture, and institute
Gas curtain body is stated equipped with air inlet pipe fitting, the gas supply assembly is connect with air inlet pipe fitting, and inlet air flow is equipped in the gas curtain body
Channel and compressed air stream injection channel, the battery case is set to the inside of fixture, and the gas curtain body is set to battery case two sides, institute
It states and is equipped with left air inlet pipe fitting and right air inlet pipe fitting in air inlet pipe fitting, inlet air flow in the left air inlet pipe fitting and gas curtain body
The left end in channel connects, and the right air inlet pipe fitting is connect with the right end in inlet air flow channel in gas curtain body, and the inlet flow
Road is connected to compressed air stream injection channel；
The compressed air stream injection channel passes through gas curtain body upper side and extends, and the gas curtain body upper side is equipped with and pressure
One group of gas port of contracting jet-impingement channel connection, the gas curtain body upper side are connect with cover board, and being formed has defencive function
The compression protection side-blown channel of air guide.
The gas-tpe fitting of the utility model protection device of air can connect protection tracheae, and the flow that gas curtain body introduces is big, passes through
Gas flow after the compression of compressed air stream injection channel, acceleration is big, and air pressure is strong, and a face body is formed uniformly after contacting with cover board
High speed protecting window can effectively protect molten bath and workpiece in welding process is avoided to aoxidize；High Power Laser Welding production can be dispersed simultaneously
Raw plasma shielding.
The side-blown channel opposite side of air guide of compression protection described in the utility model is equipped with deflector, and the deflector uses
The side-blown protection air-flow via between tab of high speed is incident on V-arrangement deflector tip and middle section, through water conservancy diversion by V-arrangement deflector
Gas is discharged to two sides after plate, covers the weld seam of tab back side.So that the gas that protection device of air is blowed can be throughout complete weldering
Seam.
It is equipped with gas source, gas source processing unit in gas supply assembly described in the utility model, conveys gas circuit and for adjusting
The flow regulating unit of flow is controlled, one end of the conveying gas circuit is connect with gas source, and the other end is connect with air inlet pipe fitting,
The conveying gas circuit is equipped with switching control pilot close to one end of gas source, and the gas source processing unit is installed in conveying gas circuit, and
Set on the rear of switching control pilot, the flow regulating unit is installed in conveying gas circuit, and after gas source processing unit
Side.
Filter, pressure regulator valve, pressure gauge and oil sprayer are equipped in gas source processing unit described in the utility model, it is described
Filter is installed in conveying gas circuit, and is set to the rear of switching control pilot, and the pressure regulator valve is installed on the rear of filter, institute
The rear that pressure gauge is installed on pressure regulator valve is stated, the oil sprayer is installed on the rear of pressure gauge.
Flowmeter and throttle valve are equipped in flow regulating unit described in the utility model, the flowmeter is installed on gas source
Processing unit rear, the throttle valve are installed on the rear of flowmeter.
Fixture described in the utility model and protection-gas welding apparatus use unified collocation, can satisfy one even
Multiple workpiece carry out high-speed welding simultaneously, greatly improve the speed and working efficiency of its welding, it is ensured that the welding matter of workpiece by the gross
Amount reaches expected standard.
Battery case described in the utility model is equipped with positive and negative tab.
Above-mentioned technical proposal can be seen that the utility model has the following beneficial effects:
1, the gas-tpe fitting of the utility model protection device of air can connect protection tracheae, and the flow that gas curtain body introduces is big, warp
Gas flow after overcompression jet-impingement channel compressions, acceleration is big, and air pressure is strong, and a face is formed uniformly after contacting with cover board
Body high speed protecting window can effectively protect molten bath and workpiece in welding process is avoided to aoxidize；High Power Laser Welding can be dispersed simultaneously
The plasma of generation shields.
2, the gas curtain body of battery case two sides is substantially to be accurately positioned, clamped to battery case workpiece in the utility model
Component, belong to a part of frock clamp, that is to say, that the laser scanning welding protect device of air be integrally to be set with frock clamp
What meter was implemented, it is compact-sized effective.
3, the gas curtain of the utility model protection device of air is acted on through jet-impingement and cover board, is formed uniform gas curtain cutting and is protected
Shield, can stop to splash completely enters laser head, protects condenser lens from the sputtering of metal vapors pollution and liquid molten drop, significantly
Improve protecting effect.
4, compressed air stream injection channel described in the utility model passes through gas curtain body upper side and extends, on the gas curtain body
Side is equipped with one group of gas port being connected to compressed air stream injection channel, and the gas curtain body upper side is connect with cover board, is formed
The side-blown channel of air guide is protected in compression with defencive function, can cover the strip weld seam of nearside, the billet weld seam of two sides, and
The part that the strip weld seam in distal side is not blocked by cell polar ear.
Detailed description of the invention
Fig. 1 is the structural schematic diagram of the utility model；
Fig. 2 is the structural schematic diagram of gas curtain body in the utility model；
Fig. 3 is the structural schematic diagram of battery case in the utility model；
Fig. 4 is the schematic diagram of gas supply assembly in the utility model；
Fig. 5 is the partial schematic diagram of gas curtain body.
Specific embodiment
In the following with reference to the drawings and specific embodiments, the utility model is furtherd elucidate.
Embodiment 1
A kind of laser galvanometer scanning protection-gas welding apparatus for battery case encapsulation as shown in Figures 1 to 5, comprising:
One group of battery case 1, fixture 2 and protection-gas welding apparatus 3 for fixing battery case, wherein the protection-gas welding apparatus 3
In be equipped with one group of gas curtain body 31 and gas supply assembly 32, the gas curtain body 31 is set to the inside of fixture 2, and sets on the gas curtain body 31
There is air inlet pipe fitting, the gas supply assembly 32 is connect with air inlet pipe fitting, and inlet air flow channel 4 and pressure are equipped in the gas curtain body 31
Contracting jet-impingement channel 5, the battery case 1 is set to the inside of fixture 2, and the gas curtain body 31 is set to 1 two sides of battery case, described
Left air inlet pipe fitting 311 and right air inlet pipe fitting 312, the left air inlet pipe fitting 311 and gas curtain body are equipped in air inlet pipe fitting
The left end connection in inlet air flow channel 4 in 31, the right air inlet pipe fitting 222 and the right end in inlet air flow channel 4 in gas curtain body 31 connect
It connects, and the inlet air flow channel 4 is connected to compressed air stream injection channel 5；
The compressed air stream injection channel 5 passes through 31 upper side of gas curtain body and extends, and sets on 31 upper side of gas curtain body
There is one group of gas port 6 being connected to compressed air stream injection channel 4,31 upper side of gas curtain body is connect with cover board 7, and formation has
The side-blown channel of air guide is protected in the compression of defencive function.
The side-blown channel opposite side of air guide of compression protection described in the present embodiment is equipped with deflector 8, and the deflector 8 uses
V-arrangement deflector.
In gas supply assembly 32 described in the present embodiment be equipped with gas source 321, gas source processing unit 322, conveying gas circuit 323 and
For adjusting the flow regulating unit 324 of control flow, one end of the conveying gas circuit 323 is connect with gas source 321, the other end
It is connect with air inlet pipe fitting, the conveying gas circuit 323 is equipped with switching control pilot 325 close to one end of gas source 321, at the gas source
Reason unit 322 is installed in conveying gas circuit 323, and is set to the rear of switching control pilot 325, and the flow regulating unit 324 is pacified
Loaded on conveying gas circuit 323 on, and be set to gas source processing unit 322 rear.
Filter 3221, pressure regulator valve 3222,3223 and of pressure gauge are equipped in gas source processing unit described in the present embodiment 322
Oil sprayer 3224, the filter 3221 is installed in conveying gas circuit 323, and is set to the rear of switching control pilot 325, described
Pressure regulator valve 3222 is installed on the rear of filter 3221, and the pressure gauge 3223 is installed on the rear of pressure regulator valve 3222, the oil
Day with fog 3224 is installed on the rear of pressure gauge 3223.
Flowmeter 3241 and throttle valve 3242, the flowmeter are equipped in flow regulating unit 324 described in the present embodiment
3241 are installed on 322 rear of gas source processing unit, and the throttle valve 3242 is installed on the rear of flowmeter 3241.
Fixture 2 described in the present embodiment and protection-gas welding apparatus 3 use unified collocation, can satisfy one even
Multiple workpiece carry out high-speed welding simultaneously.
Battery case described in the present embodiment is equipped with positive and negative tab.
Embodiment 2
A kind of laser galvanometer scanning protection-gas welding apparatus for battery case encapsulation as shown in Figures 1 to 5, comprising:
One group of battery case 1, fixture 2 and protection-gas welding apparatus 3 for fixing battery case, wherein the protection-gas welding apparatus 3
In be equipped with one group of gas curtain body 31 and gas supply assembly 32, the gas curtain body 31 is set to the inside of fixture 2, and sets on the gas curtain body 31
There is air inlet pipe fitting, the gas supply assembly 32 is connect with air inlet pipe fitting, and inlet air flow channel 4 and pressure are equipped in the gas curtain body 31
Contracting jet-impingement channel 5, the battery case 1 is set to the inside of fixture 2, and the gas curtain body 31 is set to 1 two sides of battery case, described
Left air inlet pipe fitting 311 and right air inlet pipe fitting 312, the left air inlet pipe fitting 311 and gas curtain body are equipped in air inlet pipe fitting
The left end connection in inlet air flow channel 4 in 31, the right air inlet pipe fitting 222 and the right end in inlet air flow channel 4 in gas curtain body 31 connect
It connects, and the inlet air flow channel 4 is connected to compressed air stream injection channel 5；
The compressed air stream injection channel 5 passes through 31 upper side of gas curtain body and extends, and sets on 31 upper side of gas curtain body
There is one group of gas port 6 being connected to compressed air stream injection channel 4,31 upper side of gas curtain body is connect with cover board 7, and formation has
The side-blown channel of air guide is protected in the compression of defencive function.
The side-blown channel opposite side of air guide of compression protection described in the present embodiment is equipped with deflector 8, and the deflector 8 uses
V-arrangement deflector.
In gas supply assembly 32 described in the present embodiment be equipped with gas source 321, gas source processing unit 322, conveying gas circuit 323 and
For adjusting the flow regulating unit 324 of control flow, one end of the conveying gas circuit 323 is connect with gas source 321, the other end
It is connect with air inlet pipe fitting, the conveying gas circuit 323 is equipped with switching control pilot 325 close to one end of gas source 321, at the gas source
Reason unit 322 is installed in conveying gas circuit 323, and is set to the rear of switching control pilot 325, and the flow regulating unit 324 is pacified
Loaded on conveying gas circuit 323 on, and be set to gas source processing unit 322 rear.
Filter 3221, pressure regulator valve 3222,3223 and of pressure gauge are equipped in gas source processing unit described in the present embodiment 322
Oil sprayer 3224, the filter 3221 is installed in conveying gas circuit 323, and is set to the rear of switching control pilot 325, described
Pressure regulator valve 3222 is installed on the rear of filter 3221, and the pressure gauge 3223 is installed on the rear of pressure regulator valve 3222, the oil
Day with fog 3224 is installed on the rear of pressure gauge 3223.
Flowmeter 3241 and throttle valve 3242, the flowmeter are equipped in flow regulating unit 324 described in the present embodiment
3241 are installed on 322 rear of gas source processing unit, and the throttle valve 3242 is installed on the rear of flowmeter 3241.
Fixture 2 described in the present embodiment and protection-gas welding apparatus 3 use unified collocation, can satisfy one even
Multiple workpiece carry out high-speed welding simultaneously.
Battery case described in the present embodiment is equipped with positive and negative tab.
The working method of laser galvanometer scanning protection-gas welding apparatus for battery case encapsulation, it is characterised in that: specific
Working method it is as follows:
1): being first turned on switching control pilot 325, supplied from gas source 321 to conveying gas circuit 323；
2): when gas through being set to conveying gas circuit 323 on gas source processing unit 322 when, first pass through filter 3221 into
Row filtering carries out pressure adjusting using pressure regulator valve 3222, is monitored using pressure gauge 3223 to pressure, then by oil
It is continued to move along after the processing of day with fog 3224；
3): gas pass through gas source processing unit 322 after, by flow regulating unit 324 to flow adjust after, by into
Gas-tpe fitting enters in the inlet air flow channel 4 in gas curtain body 31；
4): after gas enters inlet air flow channel 4, since inlet air flow channel 4 is communicated with compressed air stream injection channel 5, and
Compressed air stream injection channel 5 passes through 31 upper side of gas curtain body and extends；
5): and by the gas flow after compression, acceleration, atmospheric pressure is compressed by compressed air stream injection channel 5 and is protected
The side-blown channel blowout of air guide
6): extending since the compressed air stream injection channel 5 passes through 31 upper side of gas curtain body, 31 upside of gas curtain body
Face is equipped with one group of gas port 6 being connected to compressed air stream injection channel 4, and 31 upper side of gas curtain body is connect with cover board 7, shape
The side-blown channel of air guide is protected at the compression with defencive function, thus the gas for entering inlet air flow channel 4 will pass through compressed gas
Gas after the compression of stream injection channel 5, acceleration will be discharged by the compression protection side-blown channel of air guide, to can effectively protect
Molten bath avoids workpiece in welding process from aoxidizing；The plasma shielding of High Power Laser Welding generation can also be dispersed；
7): and, in the course of work of above-mentioned steps 1 to 6, air-flow is by compressed air stream injection channel 5 in gas curtain body 31
Injection is acted on cover board 7, forms uniform gas curtain cutting protection, and can stop to splash completely enters laser head, protects condenser lens
From the sputtering of metal vapors pollution and liquid molten drop.
The above is only the preferred embodiment of the utility model, it is noted that for the common skill of the art
For art personnel, without departing from the principle of this utility model, several improvement can also be made, these improvement also should be regarded as
The protection scope of the utility model.
Claims (6)
1. the laser galvanometer scanning protection-gas welding apparatus for battery case encapsulation, it is characterised in that: include: one group of battery case
(1), for fixing the fixture (2) and protection-gas welding apparatus (3) of battery case, wherein set in the protection-gas welding apparatus (3)
There are one group of gas curtain body (31) and gas supply assembly (32), the gas curtain body (31) is set to the inside of fixture (2), and the gas curtain body
(31) be equipped with air inlet pipe fitting, the gas supply assembly (32) connect with air inlet pipe fitting, the gas curtain body (31) equipped with into
Airflow channel (4) and compressed air stream injection channel (5), the battery case (1) are set to the inside of fixture (2), and the gas curtain body
(31) battery case (1) two sides are set to, are equipped with left air inlet pipe fitting (311) and right air inlet pipe fitting in the air inlet pipe fitting
(312), the left air inlet pipe fitting (311) connect with the left end in inlet air flow channel (4) in gas curtain body (31), the right air inlet pipe
Connector (312) is connect with the right end in inlet air flow channel (4) in gas curtain body (31), and the inlet air flow channel (4) is connected to compressed gas
It flows injection channel (5)；
The compressed air stream injection channel (5) passes through gas curtain body (31) upper side and extends, on gas curtain body (31) upper side
Equipped with one group of gas port (6) being connected to compressed air stream injection channel (5), gas curtain body (31) upper side and cover board (7) are even
It connects, being formed, there is the compression of defencive function to protect the side-blown channel of air guide (9).
2. the laser galvanometer scanning protection-gas welding apparatus according to claim 1 for battery case encapsulation, feature exist
In: the compression protection side-blown channel opposite side of air guide is equipped with deflector (8), and the deflector (8) uses V-arrangement deflector.
3. the laser galvanometer scanning protection-gas welding apparatus according to claim 1 for battery case encapsulation, feature exist
In: it is equipped with gas source (321) in the gas supply assembly (32), gas source processing unit (322), conveys gas circuit (323) and for adjusting
The flow regulating unit (324) of section control flow, one end of the conveying gas circuit (323) are connect with gas source (321), the other end
It is connect with air inlet pipe fitting, conveying gas circuit (323) is equipped with switching control pilot (325) close to the one end of gas source (321), described
Gas source processing unit (322) is installed in conveying gas circuit (323), and is set to the rear of switching control pilot (325), the flow tune
Section unit (324) is installed in conveying gas circuit (323), and is set to the rear of gas source processing unit (322).
4. the laser galvanometer scanning protection-gas welding apparatus according to claim 3 for battery case encapsulation, feature exist
In: filter (3221), pressure regulator valve (3222), pressure gauge (3223) and oil sprayer are equipped in the gas source processing unit (322)
(3224), the filter (3221) is installed in conveying gas circuit (323), and is set to the rear of switching control pilot (325), institute
The rear that pressure regulator valve (3222) is installed on filter (3221) is stated, after the pressure gauge (3223) is installed on pressure regulator valve (3222)
Side, the oil sprayer (3224) are installed on the rear of pressure gauge (3223).
5. the laser galvanometer scanning protection-gas welding apparatus according to claim 3 for battery case encapsulation, feature exist
In: flowmeter (3241) and throttle valve (3242), flowmeter (3241) installation are equipped in the flow regulating unit (324)
In gas source processing unit (322) rear, the throttle valve (3242) is installed on the rear of flowmeter (3241).
6. the laser galvanometer scanning protection-gas welding apparatus according to claim 1 for battery case encapsulation, feature exist
In: the fixture (2) and protection-gas welding apparatus (3) use unified collocation.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820586156.6U CN208628649U (en) | 2018-04-24 | 2018-04-24 | Laser galvanometer scanning protection-gas welding apparatus for battery case encapsulation |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820586156.6U CN208628649U (en) | 2018-04-24 | 2018-04-24 | Laser galvanometer scanning protection-gas welding apparatus for battery case encapsulation |
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| Publication Number | Publication Date |
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| CN208628649U true CN208628649U (en) | 2019-03-22 |
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ID=65733005
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| Application Number | Title | Priority Date | Filing Date |
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| CN201820586156.6U Active CN208628649U (en) | 2018-04-24 | 2018-04-24 | Laser galvanometer scanning protection-gas welding apparatus for battery case encapsulation |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108436256A (en) * | 2018-04-24 | 2018-08-24 | 同高先进制造科技（太仓）有限公司 | Battery case with defencive function encapsulates laser galvanometer scanning protection-gas welding apparatus |
| CN114951981A (en) * | 2022-05-20 | 2022-08-30 | 重庆理工大学 | Automatic control method for laser welding protective gas |
-
2018
- 2018-04-24 CN CN201820586156.6U patent/CN208628649U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108436256A (en) * | 2018-04-24 | 2018-08-24 | 同高先进制造科技（太仓）有限公司 | Battery case with defencive function encapsulates laser galvanometer scanning protection-gas welding apparatus |
| CN108436256B (en) * | 2018-04-24 | 2024-05-10 | 同高先进制造科技（太仓）有限公司 | Battery box packaging laser vibrating mirror scanning welding protection gas device with protection function |
| CN114951981A (en) * | 2022-05-20 | 2022-08-30 | 重庆理工大学 | Automatic control method for laser welding protective gas |
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