CN108145286A - A kind of welding method of power battery module framework - Google Patents
A kind of welding method of power battery module framework Download PDFInfo
- Publication number
- CN108145286A CN108145286A CN201711465340.1A CN201711465340A CN108145286A CN 108145286 A CN108145286 A CN 108145286A CN 201711465340 A CN201711465340 A CN 201711465340A CN 108145286 A CN108145286 A CN 108145286A
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- welding
- arc
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- power battery
- battery module
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Classifications
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- 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
- B23K9/00—Arc welding or cutting
- B23K9/16—Arc welding or cutting making use of shielding gas
-
- 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
- B23K9/00—Arc welding or cutting
- B23K9/235—Preliminary treatment
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- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Plasma & Fusion (AREA)
- Mechanical Engineering (AREA)
- Arc Welding In General (AREA)
Abstract
A kind of welding method of power battery module framework, it is using pilot arc and the twin arc welding manner of electric arc is followed to complete the fillet weld seam of framework side plate and framework end plate, it pilot arc and both follows the angle for keeping certain between electric arc in welding process and makes congruent melting pond is formed at the fillet weld of framework side plate and framework end plate, pilot arc uses pulse welding pattern, and electric arc is followed to use CMT cold metal transfer bond patterns.The present invention is as a result of pulse welding pattern and the twin arc welding manner of CMT bond patterns, pulse welding pattern is used to form spray transfer, help to increase fusion penetration and stable metal transition, CMT bond patterns fill and control heat input for metal, pass through optimizing integration for two electric arc difference bond patterns, welding efficiency improves 2~3 times relative to monofilament weldering, and it can effectively control thermal weld stress that framework end plate back temperature is limited within 160 DEG C, it is ensured that welding performance meets related request.
Description
Technical field
The present invention relates to a kind of twin arc welding method, it is specifically related to a kind of power battery module side plate and end plate
Welding method.
Background technology
With the enhancing of environmental protection consciousness and the promotion of national relevant policies, electric vehicle becomes the development supported energetically
Direction, and be rapidly developed, core technology is the manufacture of power battery, and power battery module framework side plate and end plate
Welding efficiency be directly related to the productivity effect of power battery.
Chinese patent application application No. is 201710596298.0 proposes a kind of power battery module side plate and end
The butt welding method of plate using method for laser welding, i.e., adds in helical scanning line in welding track, helps to reduce stomata
Rate promotes welding quality.Under laser power 5.8kw, speed of welding can promote 0.1m/s.But high power laser cost of equipment
Costliness limits being widely applied for this technology, while the technology has higher requirements to fit-up gap.
At present, the welding method of power battery module framework side plate and end plate also has monofilament CMT welding techniques, agitating friction
Welding technique, but the production efficiency of these technologies can not be promoted effectively at present close to the limit.
Invention content
It is an object of the invention to be directed to it is above-mentioned there are problem and shortage, one kind is provided and can be ensured that joint performance and end plate
Back welding temperature is met the requirements, and welding efficiency is high, the welding method of the good power battery module framework of welding quality.
The technical proposal of the invention is realized in this way：
The welding method of power battery module framework of the present invention, its main feature is that：Using pilot arc and follow the double of electric arc
Electric arc welding manner completes the fillet weld seam of framework side plate and framework end plate, and pilot arc described in welding process and with
Both make to form congruent melting pond at the fillet weld of framework side plate and framework end plate with certain angle is kept between electric arc, wherein
The pilot arc uses pulse welding pattern, described that electric arc is followed to use CMT cold metal transfer bond patterns.
Wherein, the pulse frequency of above-mentioned pilot arc is 200HZ, welding current 180A.
The above-mentioned welding current for following electric arc is 120A.
Above-mentioned pilot arc and to follow angle α between electric arc be 60 °.
Weld seam is protected using protection gas hood in welding process, and protective gas uses inert argon gas or helium,
Throughput is 25L/min.
The speed of welding used in welding process is 2.5m/min~4.0m/min, and the temperature of controller chassis body end back
Less than 160 DEG C.
Above-mentioned framework side plate uses 5083 aluminium alloy plates of the thickness for 1.5mm~3.0mm.
Above-mentioned framework end plate uses 6063 aluminium alloy plates of the thickness for 16mm.
Compared with prior art, the present invention it has the following advantages：
The present invention uses impulse welding as a result of pilot arc and the twin arc welding manner for following electric arc, wherein pilot arc
Pattern is connect, is used to form spray transfer, helps to increase fusion penetration and stable metal transition, electric arc is followed to use CMT bond patterns,
Heat input is filled and controlled for metal, by optimizing integration for two electric arc difference bond patterns, breaches original technology
Limitation, welding efficiency improve 2~3 times, while can effectively control thermal weld stress by the framework end plate back side relative to monofilament weldering
Temperature limiting is within 160 DEG C, it is ensured that welding performance can meet related request well.
The present invention is further illustrated below in conjunction with the accompanying drawings.
Description of the drawings
Fig. 1 is the welding method schematic diagram of the present invention.
The electric arc that Fig. 2 is the present invention arranges schematic diagram.
Specific embodiment
As Figure 1-Figure 2, the welding method of power battery module framework of the present invention, using pilot arc 3 and with
It is welded with the twin arc welding manner of electric arc 4 to complete framework side plate 1 and the fillet weld 6 of framework end plate 2, framework side plate 1 uses
Thickness is 5083 aluminium alloy plates of 1.5mm~3.0mm, and framework end plate 2 uses 6063 aluminium alloy plates of the thickness for 16mm, and welds
It pilot arc 3 and both follows the angle for keeping certain between electric arc 4 in the process and makes in framework side plate 1 and framework end plate 2
Congruent melting pond 7 is formed at fillet weld 6, in the present embodiment, pilot arc and to follow the angle α between electric arc be 60 °, welding speed
It spends for 2.5m/min~4.0m/min, and the temperature of controller chassis side back is less than 160 DEG C, while right using protection gas hood 5
Weld seam is protected, and protective gas is using inert argon gas or helium, throughput 25L/min.Wherein, pilot arc 3 makes
With pulse welding pattern, pulse frequency 200HZ, welding current 180A.Electric arc 4 is followed to be welded using CMT cold metal transfers
Meet pattern, welding current 120A.
Specifically, the corner connection of the framework side plate and framework end plate of aluminium alloy is carried out using the present invention, before being fixed first before weldering
Welding gun and rear welding gun, it is ensured that the angle α between two electric arcs is maintained at 60 °；Then, protection gas hood is nested in front and rear welding gun
On, when welding, enables protection gas hood to be close to face of weld, it is ensured that protecting effect.The gage of wire that front and rear welding gun uses is
1.2mm, welding manner use and push away wire bond.
Below by specific embodiment, the present invention is further illustrated.
Embodiment 1：
The present embodiment is implemented for 3 mm thickness framework side plates and 16mm thickness frameworks end plate, is as follows：
（1）Workpiece surface oxidation film to be welded is cleared up, and welding surface greasy dirt is removed using alcohol or acetone with scraper；
（2）Using fixture fixed frame side plate and framework end plate, framework side board edge is made to keep 3.5mm away from framework end sheet surface；
（3）The pulse frequency for setting pilot arc is 200HZ, welding current 180A；
（4）It is 120A that setting, which follows the welding current of electric arc,；
（5）Setting protective gas be argon gas, throughput 25L/min；
（6）Setting speed of welding is 2.5m/min；
The appearance of weld obtained using above-mentioned technological parameter is beautiful, surface zero defect, welding point through pore-free and the crackle of detecting a flaw,
The maximum temperature of welding process center side back is 140 DEG C.
Embodiment 2：
The present embodiment is implemented for 1.5 mm thickness framework side plates and 16mm thickness frameworks end plate, is as follows：
（1）Workpiece surface oxidation film to be welded is cleared up, and welding surface greasy dirt is removed using alcohol or acetone with scraper；
（2）Using fixture fixed frame side plate and framework end plate, framework side board edge is made to keep 2.5mm away from framework end sheet surface；
（3）The pulse frequency for setting pilot arc is 200HZ, welding current 180A；
（4）It is 120A that setting, which follows the welding current of electric arc,；
（5）Setting protective gas be argon gas, throughput 25L/min；
（6）Setting speed of welding is 4.0m/min；
The appearance of weld obtained using above-mentioned technological parameter is beautiful, surface zero defect, welding point through pore-free and the crackle of detecting a flaw,
The maximum temperature of welding process center side back is 120 DEG C.
The present invention is described by embodiment, but is not limited the invention, with reference to description of the invention, institute
Other variations of disclosed embodiment, are such as readily apparent that the professional person of this field, such variation should belong to
Within the scope of the claims in the present invention limit.
Claims (8)
1. a kind of welding method of power battery module framework, it is characterised in that：Using pilot arc and follow the double electric of electric arc
Arc welding mode completes the fillet weld seam of framework side plate and framework end plate, and pilot arc described in welding process and follows
It both keeps certain angle between electric arc and makes to form congruent melting pond, wherein institute at the fillet weld of framework side plate and framework end plate
Pilot arc is stated using pulse welding pattern, it is described that electric arc is followed to use CMT cold metal transfer bond patterns.
2. the welding method of power battery module framework according to claim 1, it is characterised in that：The arteries and veins of above-mentioned pilot arc
Frequency is rushed as 200HZ, welding current 180A.
3. the welding method of power battery module framework according to claim 1, it is characterised in that：The above-mentioned weldering for following electric arc
Electric current is connect as 120A.
4. the welding method of power battery module framework according to claim 1, it is characterised in that：Above-mentioned pilot arc and with
It it is 60 ° with the angle α between electric arc.
5. the welding method of power battery module framework according to claim 1, it is characterised in that：Using guarantor in welding process
Tyre protecting shield protects weld seam, and protective gas is using inert argon gas or helium, throughput 25L/min.
6. the welding method of power battery module framework according to claim 1, it is characterised in that：It is used in welding process
Speed of welding is 2.5m/min~4.0m/min, and the temperature of controller chassis body end back is less than 160 DEG C.
7. the welding method of power battery module framework according to claim 1, it is characterised in that：Above-mentioned framework side plate uses
Thickness is 5083 aluminium alloy plates of 1.5mm~3.0mm.
8. the welding method of power battery module framework according to claim 1, it is characterised in that：Above-mentioned framework end plate uses
Thickness is 6063 aluminium alloy plates of 16mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711465340.1A CN108145286A (en) | 2017-12-28 | 2017-12-28 | A kind of welding method of power battery module framework |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711465340.1A CN108145286A (en) | 2017-12-28 | 2017-12-28 | A kind of welding method of power battery module framework |
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| CN108145286A true CN108145286A (en) | 2018-06-12 |
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| CN201711465340.1A Pending CN108145286A (en) | 2017-12-28 | 2017-12-28 | A kind of welding method of power battery module framework |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110405316A (en) * | 2019-07-19 | 2019-11-05 | 清华大学 | The method for improving ageing strengthening aluminum alloy melting plumb joint tensile property |
| CN114012263A (en) * | 2021-12-02 | 2022-02-08 | 远景动力技术(江苏)有限公司 | Lightweight aluminum plate welding method and battery module shell machining method |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1894070A (en) * | 2003-12-15 | 2007-01-10 | 弗罗纽斯国际有限公司 | Welding unit and welding method by means of which at least two different welding processes may be combined |
| CN103560263A (en) * | 2013-11-08 | 2014-02-05 | 宁德时代新能源科技有限公司 | Assembling process of battery module |
| CN104203474A (en) * | 2012-03-29 | 2014-12-10 | 弗罗纽斯国际有限公司 | Welding device having two welding torches and control unit for starting the arc ignition process, and welding method for welding with two welding processes under an adapted starting process |
-
2017
- 2017-12-28 CN CN201711465340.1A patent/CN108145286A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1894070A (en) * | 2003-12-15 | 2007-01-10 | 弗罗纽斯国际有限公司 | Welding unit and welding method by means of which at least two different welding processes may be combined |
| CN104203474A (en) * | 2012-03-29 | 2014-12-10 | 弗罗纽斯国际有限公司 | Welding device having two welding torches and control unit for starting the arc ignition process, and welding method for welding with two welding processes under an adapted starting process |
| CN103560263A (en) * | 2013-11-08 | 2014-02-05 | 宁德时代新能源科技有限公司 | Assembling process of battery module |
Non-Patent Citations (1)
| Title |
|---|
| 中国机械工程学会焊接学会: "《焊接手册》", 31 July 2001, 机械工业出版社 * |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110405316A (en) * | 2019-07-19 | 2019-11-05 | 清华大学 | The method for improving ageing strengthening aluminum alloy melting plumb joint tensile property |
| CN114012263A (en) * | 2021-12-02 | 2022-02-08 | 远景动力技术(江苏)有限公司 | Lightweight aluminum plate welding method and battery module shell machining method |
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