CN102400015A - Aluminium Alloy Plate For Cell Box And Cell Box - Google Patents
Aluminium Alloy Plate For Cell Box And Cell Box Download PDFInfo
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- CN102400015A CN102400015A CN2011102672531A CN201110267253A CN102400015A CN 102400015 A CN102400015 A CN 102400015A CN 2011102672531 A CN2011102672531 A CN 2011102672531A CN 201110267253 A CN201110267253 A CN 201110267253A CN 102400015 A CN102400015 A CN 102400015A
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- aluminium alloy
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C21/00—Alloys based on aluminium
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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
- B23K26/00—Working by laser beam, e.g. welding, cutting or boring
- B23K26/20—Bonding
- B23K26/32—Bonding taking account of the properties of the material involved
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- 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 of a single cell or a single battery
- H01M50/116—Primary casings, jackets or wrappings of a single cell or a single battery characterised by the material
- H01M50/117—Inorganic material
- H01M50/119—Metals
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- 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 of a single cell or a single battery
- H01M50/147—Lids or covers
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- 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
Abstract
When carrying out pulse laser welding over JISA3000 aluminium alloy plate for a cell box, the abnormal part (irregular weld pass) can be avoided. The aluminium alloy plate for a cell boxy comprises, by mass, 0.8 to 1.5% of Mn, 0.05 to 0.2% of Cu, 0.05 to 0.6% of Si, and 0.05 to 0.7% of Fe. According to the requirement, by mass, Zn is below 0.05%, Ti below 0.04, and B below 10 ppm. The remains are constituted by A1 and some unavoidable impurity. Even when the penetration depth of the laser is over 0.25mm, the irregular weld pass can still be avoided.
Description
Technical field
The present invention relates to employed aluminum alloy plate for battery box and cell boxs such as lithium-ion secondary cell case.
Background technology
As the battery of mobile telephone and subnotebook PC etc., lithium-ion secondary cell is widely used.In the material as the housing (the following suitable cell box of claiming) of the shell of this secondary cell; Always for the miniaturized and the lightweight of battery; Good in order to be used in the processibility (plasticity) that is configured as cell box (mainly being the cell box main body) in addition, and use aluminium alloy material.
In the battery of mobile telephone and notebook computer, the expansion of battery becomes problem.Therefore, in order to obtain HS, be that alloy is a base material and heavy addition has the alloy of Cu, Mg to obtain exploitation (with reference to patent documentation 1) with Al-Mn.But; Different with the battery of mobile telephone etc.; Though for motor vehicle cell box expectation lightweight because housing and framework etc. and establish and can access intensity to a certain degree, so does not require to reach the intensity of this degree of battery of mobile telephone etc.; It would be better to both to require to have intensity, require the good alloy of processibility/weldableness again.
As the duraluminum of such cell box, known have with JISA3003 be the basis Al-Mn line aluminium alloy (with reference to patent documentation 2).Al-Mn line aluminium alloy laser welding property is excellent, with fine aluminium such as JISA1050 relatively, obtain fusion penetration easily.In the processing of the duraluminum that cell box is used, use pulse laser with continuous laser.Pulse laser and continuous laser relatively have the such characteristic of welding of suitable thin-walled material, but because welding conditions is strict, so the duraluminum cracking has the such problem (patent documentation 3) of irregular welding bead (welding bead is irregular) takes place in fine aluminium
No. 3867989 communique of [patent documentation 1] Japanese Patent
[patent documentation 2] spy opens the 2002-134069 communique
[patent documentation 3] spy opens the 2009-287116 communique
Different with the cell box of mobile telephone with the thin material of the such thickness of slab of aluminium, in the cell box that automobile is used, because the thickness that thickness of slab acquires a certain degree for the weld part intensity that obtains stipulating, needs to deepen fusion penetration.But in the JISA3003 duraluminum, if fusion penetration surpasses 0.25mm, then the shape stability of welding bead significantly reduces, and the incidence of irregular welding bead sharply increases.This irregular welding bead according to circumstances can become and is penetrated into the fusion penetration that is soldered the material back side, produces the problem that the performance of electroconductibility and WV etc. is caused disadvantageous effect.The weld part that irregular welding bead has taken place is presented among Fig. 1 (b), Fig. 2 (b).Be to form large diameter welding bead in Fig. 1 (b), in Fig. 2 (b), the dark fusion penetration welding bead in two places is irregular welding bead.The weld part of irregular welding bead does not take place in Fig. 1 (a), Fig. 2 (a) expression.The diameter of welding bead is neat, and the degree of depth of fusion penetration is certain substantially.
Summary of the invention
The present invention does in view of such prior art problems point; Its purpose is; A kind of aluminum alloy plate for battery box with the processibility (particularly main part) that is used to be made into cell box and pulse laser welding property is provided, and the cell box that uses this aluminum alloy plate for battery box.
The generation of the abnormal portion of pulse laser welding (irregular welding bead), like following explanation, (660～750 ℃) remain in the generation degree relevant (with reference to patent documentation 3) of gas hole defect in the welding bead during the resolidification (660～640 ℃) with from the pulse laser fusion time.
During welding, pulsed laser irradiation portion forms molten state, in this molten bath, has the bubble that is formed by hydrogen, shielding gas, metal vapors etc.When the pulsed laser irradiation of 1 pulse finished, pulsed laser irradiation portion was to the process of setting transition, but bubble is directly residual as gas hole defect easily when being difficult to discharge from the molten bath.Pulse laser when welding, solidify overlapping again welding bead on the welding bead of end and by the pulsed laser irradiation of back.Then, solidify and finish the road through the irradiation of pulse laser again during fusion, residual pore is by pulsed laser irradiation, and is air porous expanded, usually because aperture (the キ one ホ one Le) hypertrophyization that pulsed laser irradiation forms, and the easy depth entering of laser.Consequently fusion penetration forms very deeply, becomes the steady fusion penetration of non-perseverance portion.The steady fusion penetration of this non-perseverance portion solidifies, and becomes the irregular welding bead of weld part.
With the fusion penetration degree of depth below the 0.25mm; When carrying out pulse laser welding for the Al-Mn alloy sheets of common JISA3003 duraluminum etc.; Even also irregular welding bead can not take place with the large-line energy welding, but in the scope of fusion penetration above 0.25mm, its incidence will sharply uprise.
Therefore; Present inventors are in order to develop the advantage of the JISA3000 line aluminium alloy plate of both having given play to the former material excellence of using as the lithium ion battery case, again when deepening the fusion penetration degree of depth of pulse laser welding formation; Still can prevent the former material of the generation of irregular welding bead, carry out various experimental studies.
Consequently; Present inventors find; The Ti of trace ingredients and containing of B as the JISA3000 line aluminium alloy; Generation for the irregular welding bead in the pulse welding produces great influence, and through with the rules of content of Ti contained in this alloy and B in suitable scope, can prevent the generation of irregular welding bead.
Promptly; Aluminum alloy plate for battery box of the present invention (the following suitable aluminium alloy plate that is called); It is characterized in that; Contain Mn:0.8～1.5 quality %, Cu:0.05～0.2 quality %, Si:0.05～0.6 quality %, Fe:0.05～0.7 quality %, regulation Zn below 0.05 quality %, Ti is lower than 0.04 quality %, B is lower than 10 quality ppm, surplus is made up of Al and unavoidable impurities.
Above-mentioned aluminium alloy plate is through containing Mn, Cu, Si, the solid solution in parent phase of each element, the intensity raising of aluminium alloy plate with specified amount.In addition, through contain Mn, Si, Fe with specified amount, because the formation of intermetallic compound, plasticity improves.In addition, through Zn concentration is defined in below the specified amount, when the laser welding of aluminium alloy plate, the Zn that steam forces down can not disperse, around can not polluting.And, through Ti, B are defined in below the specified amount, during the fusion of the former material that carries out in pulse laser welding irradiation, solidify and be difficult to residual bubble in the welding bead, prevent the generation of the irregular welding bead of weld part.
Above-mentioned aluminum alloy plate for battery box, when the cell box of for example using as automobile used, using had to a certain degree thick thickness of slab (for example more than the 0.5mm).Above-mentioned aluminum alloy plate for battery box even the fusion penetration degree of depth is when surpassing the degree of depth of 0.25mm, also can prevent the generation of the irregular welding bead in the pulse laser welding.
Cell box is made up of box main body and lid material, and both carry out the pulse laser welding.Above-mentioned aluminum alloy plate for battery box is as the box main body and the use of lid material of cell box.But the lid material also can replace with other duraluminum such as JISA1050 duraluminum.
Aluminum alloy plate for battery box of the present invention has excellent pulse laser welding property.Specifically, also can prevent the generation of irregular welding bead even in current material, can not prevent in the pulse laser welding of the very dark fusion penetration degree of depth (surpassing 0.25mm) that irregular welding bead takes place.Therefore, be suitable as the cell box material that to use etc. with the automobile that pulse laser welding forms the dark fusion penetration degree of depth.
In addition, aluminum alloy plate for battery box of the present invention is keeping the intensity same with current material, and the same plasticity (contraction processibility) with desired excellence when forming box main body with current material.
Description of drawings
Fig. 1 is the vertical view (optical microscope photograph) of the weld part of pulse laser welding formation, (a) the good weld part of expression, and (b) weld part of irregular welding bead has taken place in expression.
Fig. 2 is the sectional view (optical microscope photograph) of the weld part of pulse laser welding formation, (a) the good weld part of expression, and (b) weld part of irregular welding bead has taken place in expression.The gauge of bottom right is represented 200 μ m in (a) and (b).
Embodiment
Below, more specifically explain for aluminum alloy plate for battery box of the present invention.
[formation of aluminium alloy plate]
Aluminium alloy plate of the present invention is to contain Mn, Cu, Si, Fe with specified amount, and Zn, Ti, B are defined in below the specified amount, the aluminium alloy plate that surplus is made up of Al and unavoidable impurities.
Below, describe for the qualification reason of each composition.
(Mn:0.8～1.5 quality %)
Mn is solid solution in parent phase, improves the intensity of aluminium alloy plate, has the effect that the compressive strength of making improves, along with the increase of Mn content can improve intensity.In addition; Mn and Al, Fe, Si form intermetallic compound, and (Al-Fe-Mn series intermetallic compound, Al-Fe-Mn-Si series intermetallic compound), it is separated out imperceptibly; Help the lubricant effect when cell box is processed in shaping, the plasticity of behaviour's alloy sheets is improved.But when Mn content was lower than 0.8 quality %, these effects were insufficient, if surpass 1.5 quality %, the quantity of then thick intermetallic compound increases, and when being shaped, became the starting point of crackle easily, and the plasticity of aluminium alloy plate reduces.Therefore, Mn content is more than the 0.8 quality %, below the 1.5 quality %.Be preferably more than the 0.9 quality %, below the 1.3 quality %.
(Cu:0.05～0.2 quality %)
Cu solid solution and have the effect of the intensity that improves aluminium alloy plate.But when Cu content was lower than 0.05 quality %, this effect was insufficient, if surpass 0.2 quality %, welding crack took place easily then, was not preferred therefore.Therefore, Cu content is more than the 0.05 quality %, below the 0.2 quality %.Be preferably more than the 0.1 quality %, below the 0.18 quality %.
(Si:0.05～0.6 quality %)
Si is solid solution in parent phase, improves the intensity of aluminium alloy plate, has the effect that the compressive strength of making improves.In addition, Si and Al, Mn, Fe form Al-Fe-Mn-Si series intermetallic compound (reference is about the record of the front of Mn), and the plasticity of aluminium alloy plate is improved.But when Si content was lower than 0.05 quality %, these effects were insufficient, if surpass 0.6 quality %, then compound is thick between aforementioned metal, when being shaped, became the starting point of crackle easily, and the plasticity of aluminium alloy plate reduces.In addition, if Si content surpasses 0.6 quality %, welding crack takes place easily then.Therefore, Si content is more than the 0.05 quality %, below the 0.6 quality %.Be preferably more than the 0.05 quality %, below the 0.2 quality %.
(Fe:0.05～0.7 quality %)
Fe and Mn, Si are same, form Al-Fe-Mn system, Al-Fe-Mn-Si series intermetallic compound (with reference to the record about the front of Mn), have the effect that the plasticity that makes aluminium alloy plate improves.But when Fe content was lower than 0.05 quality %, this effect was insufficient, if surpass 0.7 quality %, the quantity of then thick said intermetallic compound increases, and when being shaped, became the starting point of crackle easily, and the plasticity of aluminium alloy plate reduces.In addition, if Fe content surpasses 0.7 quality %, pore takes place easily then.Therefore, Fe content is more than the 0.05 quality %, below the 0.7 quality %.Be preferably more than the 0.4 quality %, below the 0.6 quality %.
The staple of aluminium alloy plate of the present invention as above, its content is substantially according to the composition of JISA3003.Remove the surplus of Mn, Cu, Fe, Si, except after state Ti, the B, constitute by Al and unavoidable impurities.Unavoidable impurities is included in matrix metal and the master alloy.Ti, B and main unavoidable impurities below are described.
(Ti is lower than 0.04 quality %)
Ti has makes that aluminium alloy casting is organized miniaturization, the effect of homogenize (stabilization), is purpose to prevent the rolling casting crack of slab when the casting of using, commonly used in the scope of 0.02～0.15 quality %.But under the situation of the duraluminum of aforementioned component, if contain Ti more than 0.04 quality %, then the former material under the pulsed laser irradiation (660～750 ℃) when fusion is solidifying remaining pore in the welding bead easily.Therefore, with the pulsed laser irradiation of back again during the melting and solidification welding bead, like previous explanation, fusion penetration forms deeply (the steady fusion penetration of non-perseverance portion), and it solidifies and has abnormal portion (irregular welding bead) to take place at weld part.In duraluminum of the present invention, Ti contains as unavoidable impurities in matrix metal (containing in the waste material), or above effect is purpose and the element that is added as master alloy as required.In any case, its content all need be defined as and be lower than 0.04 quality % (containing 0%).
(B is lower than 10 quality ppm)
B such as aforementioned to prevent that the casting crack of duraluminum when the slab ingot casting from being purpose, actively adds with Ti and element commonly used as the Ti-B mother alloy.But; Under the situation of the duraluminum of aforementioned component, B content is 10 quality ppm when above, and is the same with aforesaid Ti; The easy remaining pore in the welding bead that solidifies in pulsed laser irradiation portion; Again during the melting and solidification welding bead, fusion penetration forms deeply with the pulsed laser irradiation of back, and it solidifies and abnormal portion (irregular welding bead) takes place.In duraluminum of the present invention, B contains as unavoidable impurities in matrix metal (containing in the blank), or above effect is purpose and the element that is added as master alloy as required.In any case, its content all need be defined as and be lower than 10 quality ppm (containing 0ppm).Be preferably below the 9 quality ppm.
(unavoidable impurities)
As main unavoidable impurities, can enumerate Zn, Zr, Cr, Ga, V, Ni, Mg etc.
Wherein bead crack around polluting, takes place so when pulse laser welds, disperse easily because steam forces down in Zn in addition easily, makes the pulse laser welding property variation of aluminium alloy plate.Therefore, Zn content is defined in below the 0.05 quality %.Be preferably below the 0.04 quality %.
The Zr, Cr, Ga, V, Ni, Mg etc. of unavoidable impurities as other if in common known scope, then can not hinder effect of the present invention.Containing of these unavoidable impurities is respectively below the 0.05 quality %, as comprising Ti, B and Zn in interior unavoidable impurities total amount, allows in the scope of 0.15 quality %.
[method of manufacture of aluminium alloy plate]
Then, the example for the method for manufacture of aluminium alloy plate of the present invention describes.
At first, fusing, casting have the duraluminum of aforementioned component, make ingot casting, this ingot casting is implemented face milling after, with more than 480 ℃ and the temperature that is lower than aforementioned duraluminum fusing point implement to homogenize thermal treatment.Secondly, carry out hot rolling and cold rolling, the making milled sheet for this process heat treated ingot casting that homogenizes.Then; With the rate of heating more than 100 ℃/minute, this milled sheet is heated to more than 420 ℃ and is lower than the temperature province of aforementioned duraluminum fusing point, after this temperature province keeps 0～180 second; Speed of cooling with more than 300 ℃/minute is cooled off, and implements process annealing thus.Afterwards, the draft with 20～50% is implemented finally cold rolling for the milled sheet of having passed through process annealing, become aluminium alloy plate.Also have, also can implement 80～200 ℃, 0.5～8 hour final annealing for having implemented final cold rolling milled sheet as required.Through final annealing, material softening, unit elongation improves, so final annealing is the operation that is suitable for making the plasticity raising.
[cell box]
Then, describe for cell box of the present invention.Cell box of the present invention uses aforementioned aluminium alloy plate to make.
Below, the example by the method for aluminium alloy plate manufacture batteries case of the present invention and secondary cell is described.
[making method of cell box and secondary cell]
As the aluminium alloy plate of the present invention of box main body portion, through final cold rolling and become the thickness of slab about 0.7～2.0mm.This aluminium alloy plate is cut into the shape of regulation, process shape for the bottomless drum shape shape is arranged through pull and stretch processing or contraction.Repeatedly repeat this processing again, slowly increase side wall surface, implement the processing of finishing etc. as required, be configured as bottom shape and the side height of regulation and become box main body portion.Box main body portion be top opening the bottomless drum shape shape arranged.The shape of cell box is not special to be limited, and the rectangular parallelepiped of round shape, flat etc. is arranged, and follows the specification of secondary cell.
The thickness of slab decrement (contraction working modulus) of the sidewall of the box main body portion that contraction processing etc. causes amounts to and is preferably 30～80%.The thickness of slab decrement is adjusted to the thickness of slab that needs with the sidewall of the box main body that is shaped and is had any problem beyond this scope the time.
In addition, use the duraluminum identical, make cap with the aluminium alloy plate of the present invention about thickness of slab 0.7～2.0mm with box main body portion.This aluminium alloy plate is cut into the top corresponding shape with box main body portion, form inlet etc. and become cap.But cap also can be made by other duraluminums such as JISA1050 duraluminums.Hold secondary battery material (positive electrode material, negative material, dividing plate etc.) in aforementioned box main body portion, weld said cap in the above.The welding of box main body portion and cap is undertaken by the pulse laser welding that receives Waveform Control.Then, electrolytic solution is injected into the cell box from inlet, the sealing inlet becomes secondary cell.
As more than, aluminium alloy plate of the present invention is configured as the molding of the shape of expection through the multiple position press of implementing a series of shaping processing in order, it is particularly suitable for the cell box of lithium-ion secondary cell.That is, aluminium alloy plate of the present invention, the multistage pull and stretch-contraction processing harsh especially processing like this in the face of multiple position press comprised has excellent plasticity (processibility).In addition, aluminium alloy plate of the present invention also has pulse laser welding property, for example when being made into cell box, and can be with pulse laser positively watertight chest main part and cap.
[embodiment]
Below, with confirming that the comparative example to the important document of the embodiment of effect of the present invention and the invention of discontented unabridged version compares, and describes particularly.
[make and supply the examination material]
Fusion, the duraluminum formed shown in the casting table 1 and become ingot casting, this ingot casting is implemented face milling after, implement the thermal treatment that homogenizes in 4 hours with 540 ℃.Implement hot rolling for homogenize heat treated ingot casting of this process, implement cold rolling again.With 500 ℃/minute the milled sheet after cold rolling is heated to 520 ℃, keep 30 seconds with this temperature after, cool off and carry out process annealing with 500 ℃/minute.At last, the draft with 30% carries out finally cold rolling, becomes the aluminium alloy plate of thickness of slab 1.0mm.
[table 1]
| Mn | Cu | Mg | Si | Fe | Ti | Zn | B* | Al | |
| Embodiment 1 | 0.97 | 0.15 | 0.01 | 0.11 | 0.64 | 0.003 | 0.01 | 9.6 | Surplus |
| Comparative example 1 | 0.96 | 0.15 | 0.01 | 0.11 | 0.63 | 0.005 | 0.01 | 15.0 | Surplus |
| Comparative example 2 | 0.96 | 0.15 | 0.01 | 0.11 | 0.65 | 0.011 | 0.01 | 22.5 | Surplus |
| Comparative example 3 | 0.96 | 0.15 | 0.01 | 0.12 | 0.64 | 0.024 | 0.01 | 27.2 | Surplus |
| Comparative example 4 | 0.98 | 0.15 | 0.01 | 0.11 | 0.65 | 0.034 | 0.01 | 25.8 | Surplus |
| Comparative example 5 | 0.97 | 0.15 | 0.01 | 0.11 | 0.66 | 0.257 | 0.01 | 57.7 | Surplus |
| Comparative example 6 | 0.98 | 0.15 | 0.01 | 0.11 | 0.66 | 0.06O | 0.01 | 20.1 | Surplus |
| Comparative example 7 | 0.96 | 0.15 | 0.01 | 0.11 | 0.66 | 0.054 | 0.01 | 27.4 | Surplus |
| Embodiment 2 | 0.97 | 0.14 | 0.01 | 0.11 | 0.65 | 0.021 | 0.01 | 6.7 | Surplus |
| Comparative example 8 | 1.15 | 0.16 | 0.01 | 0.28 | 0.51 | 0.030 | 0.01 | 24.7 | Surplus |
| Comparative example 9 | 1.12 | 0.15 | 0.01 | 0.25 | 0.53 | 0.O30 | 0.01 | 18.0 | Surplus |
| Comparative example 10 | 1.10 | 0.76 | 0.42 | 0.26 | 0.10 | 0.010 | 0.O1 | 15.0 | Surplus |
*ppm
[test of pulse laser welding property]
Aluminium alloy plate with obtaining carries out the pulse solderability test.
As shown in Figure 1, the aluminium alloy plate of two same compositions of configuration docks end face each other, through this docking section of pulse laser welding.Weld length (welding bead length) is 90mm.In pulse laser welding, by 1 pulse laser forms the molten bath and the weld part of solidified circle shape along with the moving of laser, Yi Bian Yi Bian be formed along the welding line coincidence continuously.Welding machine uses the YAG laser of impulse hunting; Weld with following condition: welding speed is the 20cm/ branch; Peak-peak output rating 4.5kW, frequency 10Hz, the energy of per 1 pulse (heat input) are 24J/p (condition 1), 25J/p (condition 2), 26J/p (condition 3); Pulse waveform control is implemented by descending slope (ダ ウ Application ス ロ one プ), and shielding gas is 20 liters/minute a nitrogen.Also have, the heat input of per 1 pulse was regulated by the time of descending slope.
[weldableness evaluation]
In the evaluation of pulse laser welding property; At first; With naked eyes and observation by light microscope whether welding crack having taken place, full terms 1～condition 3 times, can access be judged to be " zero " who crosses over all flawless sound welding bead of welding bead total length; In condition 1～condition 3 a certain even place's crackle takes place, also is judged to be " * ".
In addition, with the irregular welding bead generation of observation by light microscope number (the every 90mm of welding bead length).Specifically,, take the plane of weld part and the optical microscope photograph of welding bead central part section, add up irregular welding bead generation number like Fig. 1, shown in 2.On this basis, at full terms the situation of irregular welding bead does not take place for 1～3 time, weld bead shape is good and be evaluated as " zero ", no matter condition 1～3 which down, even also be evaluated as weld bead shape bad " * " when 1 irregular welding bead takes place.
In addition, measure the fusion penetration degree of depth (perfecting the fusion penetration degree of depth of portion) from the optical microscope photograph of the section of weld part.
Above result is presented in the table 2.
[table 2]
The degree of depth: mm
As shown in table 2; Have the embodiment No.1,2 that one-tenth given to this invention is grouped into welding crack does not take place; In in condition 2, the condition 3～during the large-line energy condition (situation that the fusion penetration degree of depth is dark) irregular welding bead etc. does not take place yet, pulse laser welding property is excellent.
On the other hand; Though bead crack does not take place in comparative example No.1～9, the regulation of the discontented unabridged version invention of the content of Ti and/or B, therefore irregular welding bead takes place; Particularly in condition 2, condition 3～the large-line energy condition under, the frequency of generation significantly increases.In addition, Mg, Cu content comparative example No.10 how are at welding bead generation crackle, the weld part that can not get perfecting.
(embodiment 2)
[make and supply the examination material]
For the duraluminum shown in the table 3, implement the manufacturing process identical with embodiment 1, become the aluminium alloy plate of thickness of slab 10mm.[table 3]
| Mn | Cu | Mg | Si | Fe | Zn | Ti | B* | Al | |
| Embodiment 3 | 0.82 | 0.15 | - | 0.11 | 0.62 | 0.01 | 0.003 | 9.1 | Surplus |
| Embodiment 4 | 0.97 | 0.15 | - | 0.11 | 0.64 | 0.01 | 0.003 | 9.6 | Surplus |
| Embodiment 5 | 1.42 | 0.15 | - | 0.12 | 0.66 | 0.01 | 0.004 | 9.7 | Surplus |
| Embodiment 6 | 0.96 | 0.07 | - | 0.11 | 0.65 | 0.01 | 0.003 | 9.3 | Surplus |
| Embodiment 7 | 0.98 | 0.14 | - | 0.07 | 0.61 | 0.01 | 0.003 | 9.6 | Surplus |
| Embodiment 8 | 1.00 | 0.15 | - | 0.56 | 0.68 | 0.01 | 0.004 | 9.8 | Surplus |
| Embodiment 9 | 0.98 | 0.16 | - | 0.11 | 0.08 | 0.01 | 0.003 | 9.0 | Surplus |
| Embodiment 10 | 1.00 | 0.15 | - | 0.12 | 0.35 | 0.01 | 0.003 | 9.6 | Surplus |
| Embodiment 11 | 0.98 | 0.15 | ?0.04 | 0.12 | 0.65 | ?- | 0.004 | 9.3 | Surplus |
| Embodiment 12 | 0.97 | 0.15 | - | 0.11 | 0.64 | 0.04 | 0.003 | 9.5 | Surplus |
| Embodiment 13 | 0.98 | 0.15 | - | 0.12 | 0.64 | 0.01 | 0.003 | 6.5 | Surplus |
| Comparative example 11 | 0.75 | 0.15 | - | 0.11 | 0.55 | 0.01 | 0.003 | 9.5 | Surplus |
| Comparative example 12 | 1.61 | 0.16 | - | 0.12 | 0.64 | 0.01 | 0.003 | 9.6 | Surplus |
| Comparative example 13 | 0.97 | 0.03 | - | 0.11 | 0.66 | 0.01 | 0.003 | 9.6 | Surplus |
| Comparative example 14 | 0.98 | 0.23 | - | 0.11 | 0.65 | 0.01 | 0.003 | 9.4 | Surplus |
| Comparative example 15 | 1.00 | 0.14 | - | 0.03 | 0.65 | 0.01 | 0.003 | 9.6 | Surplus |
| Comparative example 16 | 0.99 | 0.15 | - | 0.66 | 0.63 | 0.01 | 0.004 | 9.8 | Surplus |
| Comparative example 17 | 0.96 | 0.16 | - | 0.11 | 0.03 | 0.01 | 0.003 | 9.6 | Surplus |
| Comparative example 18 | 0.99 | 0.15 | - | 0.11 | 0.76 | 0.01 | 0.004 | 9.5 | Surplus |
| Comparative example 19 | 1.00 | 0.15 | - | 0.12 | 0.65 | 0.07 | 0.003 | 9.3 | Surplus |
| Comparative example 20 | 0.98 | 0.14 | - | 0.11 | 0.64 | 0.01 | 0.05 | 9.8 | Surplus |
| Comparative example 21 | 0.97 | 0.15 | - | 0.11 | 0.56 | 0.01 | 0.005 | 12.2 | Surplus |
| Comparative example 22 | 0.98 | 0.15 | - | 0.11 | 0.65 | 0.01 | 0.006 | 15.3 | Surplus |
*ppm
Aluminium alloy plate with obtaining carries out following test.Its result is presented in the table 4.
[strength trial]
From aluminium alloy plate, make draw direction parallel with rolling direction and downcut JIS5 number tension test sheet, implement the tension test of JISZ2241 with this test film.0.2% ys is 130N/mm
2Above be evaluated as qualified " zero ", be lower than 130N/mm
2Evaluation defective " * ".
[formability test]
By aluminium alloy plate, use the extrusion processing machine, the contraction working modulus that makes sidewall is 40%, 15mm * horizontal 120mm is indulged in the shaping bottom surface, the rectangular battery box main body of the casing of the height 90mm of sidewall.At this moment, can not have crackle to be shaped, the formation property of be shaped surface free variable color in back and vertical stripe apperance is excellent, is evaluated as qualified " zero ", take place during shaping crackle or significant variable color is arranged or indulge conditionally, plasticity is bad, is evaluated as defective " * ".
(test of pulse laser welding property)
With same TP and the condition (wherein, the energy (heat input) of per 1 pulse being set at the condition of 25J/p) of pulse laser welding property test of embodiment 1, carry out the pulse laser welding of aluminium alloy plate.
(weldableness evaluation)
About whether welding crack and irregular welding bead taking place,, judge qualified " zero " and defective " * " with same evaluation method through observing with embodiment 1 same observational technique.
With the measuring method same with embodiment 1, measure the fusion penetration degree of depth (perfecting the fusion penetration degree of depth of portion) according to the optical microscope photograph of the section of weld part, can access be judged to be qualified " zero " of the above fusion penetration degree of depth of 0.25mm.
[table 4]
As shown in table 4, have embodiment No.3～13 that one-tenth given to this invention is grouped into, all can access the above fusion penetration degree of depth of 0.25mm, welding crack and irregular welding bead do not take place, the pulse welding property excellent.
On the other hand, its Mn of comparative example No.11 contains quantity not sufficient, intensity difference, and its Mn content of comparative example No.12 is superfluous, and plasticity is poor.Its Cu of comparative example No.13 contains quantity not sufficient, and plasticity is poor, and its Cu content of comparative example No.14 is superfluous, and welding crack takes place.Its Si of comparative example No.15 contains quantity not sufficient, and intensity and plasticity are poor, and its Si content of comparative example No.16 is superfluous, and plasticity is poor, and welding crack takes place.Comparative example 17 its Fe contain quantity not sufficient, and its Fe content of comparative example No.18 is superfluous, the plasticity inequality.Its Zn content of comparative example No.19 is superfluous, and welding crack takes place.
Its Ti content of comparative example No.20 is superfluous, and irregular welding bead all takes place for comparative example No.21,22 its B content surpluses.
Claims (4)
1. a pulse laser welds the excellent aluminum alloy plate for battery box of property; It is characterized in that; Contain Mn:0.8～1.5 quality %, Cu:0.05～0.2 quality %, Si:0.05～0.6 quality %, Fe:0.05～0.7 quality %; Regulation Zn below 0.05 quality %, Ti is lower than 0.04 quality %, B is lower than 10 quality ppm, surplus is Al and unavoidable impurities.
2. the excellent aluminum alloy plate for battery box of pulse laser welding property according to claim 1 is characterized in that thickness of slab is more than the 0.5mm.
3. a cell box main body is characterized in that, is made up of claim 1 or 2 described aluminum alloy plate for battery box.
4. a cell box is characterized in that, is cell box main body that is made up of claim 1 or 2 described aluminium alloy plates and battery cover material are carried out the cell box that the pulse laser welding forms, and wherein, the fusion penetration degree of depth of laser is more than the 0.25mm.
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| JP2010-206113 | 2010-09-14 | ||
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| JP2011-015824 | 2011-01-27 | ||
| JP2011015824A JP5950497B2 (en) | 2010-09-14 | 2011-01-27 | Aluminum alloy plate for battery case and battery case |
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| CN102400015A true CN102400015A (en) | 2012-04-04 |
| CN102400015B CN102400015B (en) | 2015-05-06 |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN103469015A (en) * | 2013-08-12 | 2013-12-25 | 安徽盛达前亮铝业有限公司 | Production technology of battery cover aluminum alloy sheet |
| CN104204249A (en) * | 2012-10-12 | 2014-12-10 | 日本轻金属株式会社 | Aluminum alloy sheet for electric cell case, having excellent moldability, heat dissipation, and weldability |
| CN104302435A (en) * | 2012-05-15 | 2015-01-21 | 丰田自动车株式会社 | Welding method, welding device, and battery manufacturing method |
| CN104428433A (en) * | 2012-03-23 | 2015-03-18 | 株式会社Uacj | Aluminum alloy material for lithium-ion cell and method for manufacturing same |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101538665A (en) * | 2008-03-19 | 2009-09-23 | 株式会社神户制钢所 | Aluminum alloy plate for battery box and manufacturing method thereof |
| CN101764200A (en) * | 2010-01-20 | 2010-06-30 | 张力 | Packaging shell body of battery capacitor |
| CN102031428A (en) * | 2009-09-28 | 2011-04-27 | 株式会社神户制钢所 | Aluminum alloy hard foil for battery collector |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| JP4105404B2 (en) | 2001-05-15 | 2008-06-25 | 三菱アルミニウム株式会社 | Manufacturing method of aluminum alloy plate for secondary battery case |
| JP3760262B2 (en) | 2001-06-21 | 2006-03-29 | 日本軽金属株式会社 | Manufacturing method of aluminum alloy plate with excellent pulse laser weldability |
-
2011
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101538665A (en) * | 2008-03-19 | 2009-09-23 | 株式会社神户制钢所 | Aluminum alloy plate for battery box and manufacturing method thereof |
| CN102031428A (en) * | 2009-09-28 | 2011-04-27 | 株式会社神户制钢所 | Aluminum alloy hard foil for battery collector |
| CN101764200A (en) * | 2010-01-20 | 2010-06-30 | 张力 | Packaging shell body of battery capacitor |
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104428433A (en) * | 2012-03-23 | 2015-03-18 | 株式会社Uacj | Aluminum alloy material for lithium-ion cell and method for manufacturing same |
| CN104428433B (en) * | 2012-03-23 | 2017-04-05 | 株式会社Uacj | Lithium ion battery aluminum alloy plate materials and its manufacture method |
| CN104302435A (en) * | 2012-05-15 | 2015-01-21 | 丰田自动车株式会社 | Welding method, welding device, and battery manufacturing method |
| US10010974B2 (en) | 2012-05-15 | 2018-07-03 | Toyota Jidosha Kabushiki Kaisha | Welding method, welding device, and method for manufacturing battery |
| CN104204249A (en) * | 2012-10-12 | 2014-12-10 | 日本轻金属株式会社 | Aluminum alloy sheet for electric cell case, having excellent moldability, heat dissipation, and weldability |
| CN104204249B (en) * | 2012-10-12 | 2017-10-13 | 日本轻金属株式会社 | The aluminium alloy plate for battery case of formability, thermal diffusivity and excellent weldability |
| CN103469015A (en) * | 2013-08-12 | 2013-12-25 | 安徽盛达前亮铝业有限公司 | Production technology of battery cover aluminum alloy sheet |
| CN103469015B (en) * | 2013-08-12 | 2016-04-06 | 安徽盛达前亮铝业有限公司 | A kind of production technique of battery cover aluminum alloy sheet |
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| KR20120028257A (en) | 2012-03-22 |
| CN102400015B (en) | 2015-05-06 |
| KR101370087B1 (en) | 2014-03-05 |
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