CN105914389A - Laser precision welding method for edge sealing of soft-package aluminum shell battery cell - Google Patents
Laser precision welding method for edge sealing of soft-package aluminum shell battery cell Download PDFInfo
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- CN105914389A CN105914389A CN201610442921.2A CN201610442921A CN105914389A CN 105914389 A CN105914389 A CN 105914389A CN 201610442921 A CN201610442921 A CN 201610442921A CN 105914389 A CN105914389 A CN 105914389A
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- aluminum
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- edge sealing
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- 229910052782 aluminium Inorganic materials 0.000 title claims abstract description 56
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 title claims abstract description 51
- 238000007789 sealing Methods 0.000 title claims abstract description 48
- 238000003466 welding Methods 0.000 title claims abstract description 30
- 238000000034 method Methods 0.000 title claims abstract description 18
- 239000004677 Nylon Substances 0.000 claims abstract description 47
- 229920001778 nylon Polymers 0.000 claims abstract description 47
- 239000011521 glass Substances 0.000 claims abstract description 22
- 239000012528 membrane Substances 0.000 claims abstract description 20
- 239000002131 composite material Substances 0.000 claims abstract description 19
- 239000004033 plastic Substances 0.000 claims abstract description 17
- 239000000110 cooling liquid Substances 0.000 claims abstract description 11
- 238000010521 absorption reaction Methods 0.000 claims abstract description 5
- 238000002835 absorbance Methods 0.000 claims description 7
- 230000001678 irradiating effect Effects 0.000 claims description 3
- 238000003825 pressing Methods 0.000 claims description 3
- 238000007711 solidification Methods 0.000 claims description 3
- 230000008023 solidification Effects 0.000 claims description 3
- 238000001816 cooling Methods 0.000 claims description 2
- 230000000694 effects Effects 0.000 abstract description 8
- 230000008901 benefit Effects 0.000 abstract description 4
- 238000004519 manufacturing process Methods 0.000 abstract description 4
- 238000010438 heat treatment Methods 0.000 abstract description 3
- 239000011888 foil Substances 0.000 abstract 1
- 239000010410 layer Substances 0.000 description 120
- 239000004411 aluminium Substances 0.000 description 8
- 238000003475 lamination Methods 0.000 description 8
- 239000005030 aluminium foil Substances 0.000 description 6
- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical compound [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 description 4
- 230000005540 biological transmission Effects 0.000 description 4
- 239000007788 liquid Substances 0.000 description 4
- 229910052744 lithium Inorganic materials 0.000 description 4
- 239000000463 material Substances 0.000 description 4
- 238000005516 engineering process Methods 0.000 description 2
- 239000011229 interlayer Substances 0.000 description 2
- 238000002955 isolation Methods 0.000 description 2
- 229920006284 nylon film Polymers 0.000 description 2
- 239000002985 plastic film Substances 0.000 description 2
- 229920006255 plastic film Polymers 0.000 description 2
- 229920000098 polyolefin Polymers 0.000 description 2
- 238000001149 thermolysis Methods 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- HBBGRARXTFLTSG-UHFFFAOYSA-N Lithium ion Chemical compound [Li+] HBBGRARXTFLTSG-UHFFFAOYSA-N 0.000 description 1
- 238000004026 adhesive bonding Methods 0.000 description 1
- 239000012752 auxiliary agent Substances 0.000 description 1
- 230000004888 barrier function Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 239000011258 core-shell material Substances 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000005868 electrolysis reaction Methods 0.000 description 1
- 239000003792 electrolyte Substances 0.000 description 1
- 238000004880 explosion Methods 0.000 description 1
- 206010016766 flatulence Diseases 0.000 description 1
- 238000007731 hot pressing Methods 0.000 description 1
- 229910001416 lithium ion Inorganic materials 0.000 description 1
- 238000003754 machining Methods 0.000 description 1
- 238000002844 melting Methods 0.000 description 1
- 230000008018 melting Effects 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 238000000465 moulding Methods 0.000 description 1
- 238000004806 packaging method and process Methods 0.000 description 1
- 238000012856 packing Methods 0.000 description 1
- 229920000642 polymer Polymers 0.000 description 1
- 238000004080 punching Methods 0.000 description 1
- 239000011347 resin Substances 0.000 description 1
- 229920005989 resin Polymers 0.000 description 1
- 238000009738 saturating Methods 0.000 description 1
- 229910001220 stainless steel Inorganic materials 0.000 description 1
- 239000010935 stainless steel Substances 0.000 description 1
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/04—Construction or manufacture in general
- H01M10/0404—Machines for assembling batteries
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/05—Accumulators with non-aqueous electrolyte
- H01M10/052—Li-accumulators
- H01M10/0525—Rocking-chair batteries, i.e. batteries with lithium insertion or intercalation in both electrodes; Lithium-ion batteries
-
- 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
- H01M50/10—Primary casings; Jackets or wrappings
-
- 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
- H01M50/10—Primary casings; Jackets or wrappings
- H01M50/183—Sealing members
-
- 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
-
- 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
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P70/00—Climate change mitigation technologies in the production process for final industrial or consumer products
- Y02P70/50—Manufacturing or production processes characterised by the final manufactured product
Landscapes
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Materials Engineering (AREA)
- Sealing Battery Cases Or Jackets (AREA)
Abstract
The invention provides a laser precision welding method for edge sealing of a soft-package aluminum shell battery cell. The method comprises the steps as follows: two to-be-sealed and welded battery cell soft-package aluminum-plastic composite membranes are placed in a manner that PP inner layers are oppositely laminated according to an edge sealing and welding position; a transparent glass layer is added to an upper nylon layer; the gap between the upper nylon layer and the transparent glass layer is filled with a thin-layer cooling liquid to isolate the transparent glass layer from the upper nylon layer; pressure is exerted, so that various layers are in tight contact; a laser beam is utilized to enter from the upper part of the transparent glass layer and is focused on the surface of an upper aluminum layer, so that an upper PP layer and a lower PP layer are melted; irradiation is stopped or the laser beam is moved away; and the melted upper PP layer and lower PP layer are quickly cooled and condensed to achieve firm and tight edge sealing. By laser absorption, fast heating and heat conduction of aluminum foil middle layers, the process effect that the PP layers are melted while nylon outer layers are not melted is achieved; and laser precision welding of the PP inner layers of the upper and lower aluminum-plastic composite membranes is achieved under the added pressure-assisted action. The laser precision welding method has the advantages of small edge sealing width, good sealing quality, high production efficiency and the like.
Description
Technical field
The invention belongs to laser precision machining field, be specifically related to swashing of a kind of Soft Roll aluminum hull battery core edge sealing
Light fine welding method.
Background technology
At present, lithium ion battery applications is more and more extensive, can be roughly divided into packaging shell for standard
Three classes, with stainless 18650 cylindrical batteries of column, with the square battery of aluminum hull and stainless steel case with
And with the soft-package battery of aluminum plastic film.The lithium battery of plastic-aluminum flexible packing is different from the metal of conventional liquid battery core
Shell, once occurs potential safety hazard, conventional liquid battery core easily to explode, and polymer battery core is the most only
Can be enraged, any harmful person and the problem of property safety will not be produced.Reason is the plastic-aluminum of Soft Roll
Relatively large cushion space can be provided the when of the situations such as film has certain ductility, flatulence, so
Will not be the most quick-fried.Secondly, when gas is on the increase, aluminum plastic film stress stretches, gluing between PP
Conjunction may be opened tear, will easily explosion threshold values to before first release gas, thus anti-
Stop blast.Furthermore, when the gas of soft pack cell increases, the positive/negative plate being easily caused inside separates
Open very much so that reaction is slow, even stops, thus prevents blast.Benefit from domestic mobile phone, pen
Remembering the quick growth to lithium battery demand such as this computer, mobile terminal product, digital camera, plastic-aluminum is multiple
The market closing film goes from strength to strength.
The presently commercially available plastic-aluminum combined membrane structure of battery core Soft Roll is: internal layer polyolefin (PP) base material, in
Interbed aluminium foil and outer layer nylon film, i.e. PP layer+aluminium lamination+nylon layer, passes through cementability between every layer
Auxiliary agent is combined.Top layer nylon layer is decorative layers, also plays the effect that protection aluminium lamination is not scraped off；Middle
For form molding with prevent the aluminium lamination that moisture invades；Internal layer PP resin bed is electrolyte resistance layer.From outward
Seeing in sight, that bright face is aluminium lamination, is bag battery core, is nexine, and that face of obfuscation is nylon layer,
It it is top layer.Battery core Soft Roll aluminum-plastic composite membrane technical specification includes: outward appearance, thickness, barrier, cold punching
Molded property, heat seal strength, water soak resistance energy, electrical insulating property, inner membrance puncture-resistant performance, resistance to electrolysis
Liquid stability, electrical property etc..
Soft Roll aluminum hull battery core needs to seal Soft Roll aluminum-plastic composite membrane in the course of processing, and current one
As be all to use thermocompression bonding connection, i.e. use and be heated to the blade type pressure head of specified temp and press edge sealing up and down
Position, makes the PP internal layer of two-layer aluminum-plastic composite membrane occur fusing to be bonded together by conduction of heat.
But existing sealing machine is in Soft Roll capping processes, Soft Roll sealing part is easily made to occur that bubble causes
Soft Roll sealing declines affects soft package lithium battery service life；Secondly, existing sealing machine seals at Soft Roll
During Kou, easily there are burr in Soft Roll sealing part, affect soft package lithium battery attractive in appearance while also can shadow
Ring the bonding of Soft Roll sealing part thus affect its sealing；Furthermore, thermocompression bonding connection relies on and slowly heats up
Boosting heat seal, manufacturing process is longer, and due to long-time high-temperature baking effect, makes aluminium lamination brittle,
Thus cause sealing property to deteriorate.Finally, existing sealing machine be limited to blade type indenter size and on
The edge sealing Welding Problems stated, general edge sealing width design must be bigger, in equal area soft pack cell situation
Under accounted for the internal capacity of a part of Soft Roll aluminum hull battery core, cause capacitance loss.
Summary of the invention
The present invention is directed to above-mentioned the deficiencies in the prior art, it is provided that one has edge sealing narrow width, sealing
The laser accurate welding method of the Soft Roll aluminum hull battery core edge sealing that quality is good, production efficiency is high.
The present invention is achieved through the following technical solutions:
The laser accurate welding method of a kind of Soft Roll aluminum hull battery core edge sealing, comprises the steps:
(1) will treat that two battery core Soft Roll aluminum-plastic composite membranes that edge sealing welds, according to edge sealing welding position, make
PP internal layer is fitted placement relatively, be followed successively by the most from the bottom to top lower nylon layer, lower aluminum layer, lower PP layer,
Upper PP layer, upper aluminum layer and upper nylon layer；The thickness wherein descending nylon layer and upper nylon layer is 10～100
The thickness of μm, lower aluminum layer and upper aluminum layer is 10～100 μm, lower PP layer and the thickness of upper PP layer
It is 20～150 μm；
Described nylon layer is more than 80% to laser beam transmission rate used in later step (4)；
(2) on upper nylon layer, a transparent glass layer is set up, and at upper nylon layer and transparent glass layer
Between fill a thin layer cooling liquid, make both isolate；
Described transparent glass layer refers to laser beam transparent used in later step (4), i.e. absorbance
More than 90%；Described thin layer cooling liquid also requires that laser beam used in later step (4) saturating
Bright, i.e. absorbance is more than 90%；
(3) applying pressure and make the contact of upper and lower battery core Soft Roll aluminum-plastic composite membrane closely, contact stress is more than
1N/cm2；
(4) use laser beam incident from the top of transparent glass layer, laser beam transparent transparent glass layer,
Thin layer cooling liquid and upper nylon layer, focus on the surface of upper aluminum layer, and upper aluminum layer absorbs laser, and heat passes
It is directed at PP layer and lower PP layer, makes PP layer and the fusing of lower PP layer；
(5) stop irradiating or removing laser beam, the upper PP layer of fusing and the lower rapid cooling solidification of PP layer
Realize secure rigid edge sealing；
(6) repeat step (4)-(5), make the scanning of laser beam continuous moving can realize continuous path weldering
Connect.
Further, step (4) also includes: use another laser beam simultaneously under lower nylon layer
Side is incident, nylon layer under laser beam transparent, focuses on the surface of lower aluminum layer, and lower aluminum layer absorbs laser,
Conduction of heat, to lower PP layer and upper PP layer, makes lower PP layer and the fusing of upper PP layer；Carry out the most simultaneously
Laser Welding.
There is advantages that
1, having not yet to see the report utilizing laser welding to carry out aluminum-plastic composite membrane edge sealing, the present invention adopts
With the nylon outer layer of laser transmission top aluminum-plastic composite membrane, act directly on aluminium foil interlayer so that
Aluminium foil absorbs laser energy and is rapidly heated, and conduction of heat is to PP internal layer and the bottom plastic-aluminum fitted therewith
The PP internal layer of composite membrane, makes the PP internal layer rapid melting of top and the bottom aluminum-plastic composite membrane, simultaneously additional
Under pressure effect, it is achieved the firm welding of top and the bottom aluminum-plastic composite membrane PP internal layer.The ingenious utilization of the present invention
The physical characteristics of materials of aluminum-plastic composite membrane, nylon outer layer is to common infrared, the laser of visible light wave range
The preferable transmissison characteristic (general absorbance is more than 80%) of bundle, and the fusing point (that nylon outer layer is higher
As more than 350 degree) fusing point (generally below 200 degree) the deviation feature relatively low with PP internal layer, utilize
The absorption laser of aluminium foil interlayer, it is rapidly heated and conduction of heat, it is achieved the fusing of PP layer and nylon outer layer are not
The technological effect of fusing, is aided with under impressed pressure effect, it is achieved that top and the bottom aluminum-plastic composite membrane PP internal layer
Laser accurate welding.
2, comparing traditional thermocompression bonding connection, the laser accurate welding method heating of the present invention is very quick,
Welding efficiency is high, and avoids the technology that the long-time high-temperature baking of conventional thermal pressure welding makes aluminium lamination brittle and ask
Topic.
3, the isolation of the ingenious uniform pressure effect that make use of glass plate of the present invention and cooling liquid with
Thermolysis, prevents nylon layer self slight absorption laser and is caused heating up by aluminium foil thermal too high
Incident adhesion, burn-off phenomenon, and glass sheet press be uniform, it is to avoid sealing produce burr,
The problem of bubble, the method is applicable to the laser accurate welding with similar multilayer film combined material,
Relevance grade is the widest.
4, the sealing edge quality welded due to the laser accurate of the present invention is high, so that edge sealing width
It is greatly reduced, in the case of same size soft pack cell, saves edge sealing area thus promote battery core area
(i.e. battery core capacity), and regulate edge sealing width and need not change blade type hot pressing as conventional thermal pressure welding
Head, edge sealing width is determined by laser beam spot diameter, easy to adjust, low cost.
5, comparing traditional thermoae plate pressure welding, laser welding measure of precision is high, and production efficiency is high, automatically
Change degree is higher.
Accompanying drawing explanation
Fig. 1 is the Welding Structure figure of Soft Roll aluminum hull battery core edge sealing of the present invention.
Detailed description of the invention
The present invention will be further described in detail with detailed description of the invention below in conjunction with the accompanying drawings.
The invention provides the laser accurate welding method of a kind of Soft Roll aluminum hull battery core edge sealing, including as follows
Step:
(1) as it is shown in figure 1, on workbench 10, two the battery core Soft Roll aluminum that will treat that edge sealing welds
Mould composite membrane according to edge sealing welding position, make PP internal layer relatively fit placement, be followed successively by the most from the bottom to top
Lower nylon layer 1, lower aluminum layer 2, lower PP layer 3, upper PP layer 4, upper aluminum layer 5 and upper nylon layer 6；
The thickness wherein descending nylon layer 1 and upper nylon layer 6 is 10～100 μm, lower aluminum layer 2 and upper aluminum layer 5
Thickness be 10～100 μm, the thickness of lower PP layer 3 and upper PP layer 4 is 20～150 μm.
Described battery core Soft Roll aluminum-plastic composite membrane is finished product, including internal layer polyolefin (PP) base material, centre
Layer aluminium foil and outer layer nylon film, i.e. PP layer+aluminium lamination+nylon layer, helped by cementability between every layer
Agent is combined.
Described lower nylon layer 1 and upper nylon layer 6 are to laser beam transmission rate used in later step (4)
More than 80%.
(2) on upper nylon layer 6, a transparent glass layer 7 is set up, and at upper nylon layer 6 with transparent
Fill a thin layer cooling liquid 8 (such as water) between glassy layer 7, make both isolate；
Described transparent glass layer 7 refers to laser beam transparent used in later step (4), i.e. transmission
Rate is more than 90%；Described thin layer cooling liquid 8 also requires that laser used in later step (4)
Restraint transparent, i.e. absorbance is more than 90%.
This setup takes full advantage of the uniform pressure effect of transparent glass layer 7 and thin layer is cold
But the isolation of liquid 8 and thermolysis, be possible to prevent in post laser irradiation process nylon layer 6
Self slight absorption laser and caused heat up too high incident adhesion, mistake by upper aluminum layer 5 conduction of heat
Burn phenomenon；And transparent glass layer 7 pressure is uniform, sealing can be avoided to produce burr, the asking of bubble
Topic.
(3) applying pressure and make upper and lower two battery core Soft Roll aluminum-plastic composite membranes contact closely, contact stress is big
In 1N/cm2；
(4) use laser beam 9 incident from the top of transparent glass layer 7, laser beam transparent clear glass
Layer 7, thin layer cooling liquid 8 and upper nylon layer 6, focus on the surface of upper aluminum layer 5, and upper aluminum layer 5 is inhaled
Receive laser, conduction of heat supreme PP layer 4 and lower PP layer 3, make PP layer 4 and lower PP layer 3 melt
(temperature is more than 185 degree)；
(5) stopping irradiating or removing laser beam 9, upper PP layer 4 and the lower PP layer 3 of fusing drop rapidly
Temperature solidification realizes secure rigid edge sealing；When using thermoae plate press welding method in prior art, edge sealing width is about
It is 3 ± 0.2mm, and in the present invention, laser accurate edge sealing can realize width between 0.2mm～1mm.
(6) repeat step (4)-(5), make the scanning of laser beam continuous moving can realize continuous path weldering
Connect.
Preferably, laser accurate welding method of the present invention can also be in the lower section of lower nylon layer 1
Increase a laser beam, the laser welding while of up and down.I.e. step (4) also includes: use another to swash
Light beam 9 is simultaneously incident from the lower section of lower nylon layer 1, and laser beam 9, through lower nylon layer 1, focuses on down
The surface of aluminium lamination 2, lower aluminum layer 2 absorbs laser, conduction of heat to lower PP layer 3 and upper PP layer 4, makes
Lower PP layer 3 and upper PP layer 4 melt.This mode the most simultaneously carrying out Laser Welding, can be notable
Accelerate the speed of Soft Roll aluminum hull battery core edge sealing, improve work efficiency.
It is apparent to one skilled in the art that the present invention can change into various ways, such
Change and be not regarded as a departure from the scope of the present invention.All such technical staff to described field are aobvious and easy
The amendment seen, is included within the scope of present claims.
Claims (2)
1. the laser accurate welding method of a Soft Roll aluminum hull battery core edge sealing, it is characterised in that include as
Lower step:
(1) will treat that two battery core Soft Roll aluminum-plastic composite membranes that edge sealing welds, according to edge sealing welding position, make
PP internal layer is fitted placement relatively, be followed successively by the most from the bottom to top lower nylon layer (1), lower aluminum layer (2), under
PP layer (3), upper PP layer (4), upper aluminum layer (5) and upper nylon layer (6)；Wherein descend nylon layer (1)
It is 10～100 μm, lower aluminum layer (2) and the thickness of upper aluminum layer (5) with the thickness of upper nylon layer (6)
Degree is 10～100 μm, and the thickness of lower PP layer (3) and upper PP layer (4) is 20～150 μm；
Described lower nylon layer (1) and upper nylon layer (6) are to laser beam used in later step (4)
Absorbance is more than 80%；
(2) on upper nylon layer (6), a transparent glass layer (7) is set up, and in upper nylon layer (6)
And fill a thin layer cooling liquid (8) between transparent glass layer (7), make both isolate；
Described transparent glass layer (7) refers to laser beam transparent used in later step (4), i.e.
Absorbance is more than 90%；Described thin layer cooling liquid also requires that used swashing in later step (4)
Beam transparent, i.e. absorbance are more than 90%；
(3) applying pressure and make upper and lower two battery core Soft Roll aluminum-plastic composite membranes contact closely, contact stress is big
In 1N/cm2；
(4) use laser beam (9) incident from the top of transparent glass layer (7), laser beam (9)
Through transparent glass layer (7), thin layer cooling liquid (8) and upper nylon layer (6), focus on upper aluminum layer
(5) surface, upper aluminum layer (5) absorption laser, conduction of heat supreme PP layer (4) and lower PP layer (3),
Make PP layer (4) and lower PP layer (3) fusing；
(5) stop irradiating or removing laser beam (9), the upper PP layer (4) of fusing and lower PP layer (3)
Cooling solidification realizes secure rigid edge sealing rapidly；
(6) repeat step (4)-(5), make the scanning of laser beam continuous moving can realize continuous path weldering
Connect.
The laser accurate welding method of Soft Roll aluminum hull battery core edge sealing the most according to claim 1, its
Being characterised by, step also includes in (4): use another laser beam (9) simultaneously from lower nylon layer (1)
Lower section incident, laser beam (9) passes through lower nylon layer (1), focuses on the surface of lower aluminum layer (2),
Lower aluminum layer (2) absorbs laser, and conduction of heat, to lower PP layer (3) and upper PP layer (4), makes lower PP
Layer (3) and upper PP layer (4) fusing；Carry out Laser Welding the most simultaneously.
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| CN201610442921.2A CN105914389B (en) | 2016-06-17 | 2016-06-17 | A kind of laser accurate welding method of Soft Roll aluminum hull battery core edge sealing |
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| CN201610442921.2A CN105914389B (en) | 2016-06-17 | 2016-06-17 | A kind of laser accurate welding method of Soft Roll aluminum hull battery core edge sealing |
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| CN105914389B CN105914389B (en) | 2018-04-24 |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107891223A (en) * | 2017-11-24 | 2018-04-10 | 苏州市信德威激光科技有限公司 | A kind of device and process using laser welding aluminum plastic film |
| CN108615828A (en) * | 2018-03-30 | 2018-10-02 | 北京国能电池科技股份有限公司 | The lithium ion battery of lithium ion battery encapsulating film, lithium ion battery packaging method and its preparation |
| WO2021143561A1 (en) * | 2020-01-13 | 2021-07-22 | 比亚迪股份有限公司 | Battery pack and electric vehicle |
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| KR101347975B1 (en) * | 2012-12-21 | 2014-01-08 | 넥스콘 테크놀러지 주식회사 | Manufacture line of battery pack |
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| CN107891223A (en) * | 2017-11-24 | 2018-04-10 | 苏州市信德威激光科技有限公司 | A kind of device and process using laser welding aluminum plastic film |
| CN108615828A (en) * | 2018-03-30 | 2018-10-02 | 北京国能电池科技股份有限公司 | The lithium ion battery of lithium ion battery encapsulating film, lithium ion battery packaging method and its preparation |
| WO2021143561A1 (en) * | 2020-01-13 | 2021-07-22 | 比亚迪股份有限公司 | Battery pack and electric vehicle |
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