CN1448526A - Aluminum alloy plate and accumulator case using same - Google Patents
Aluminum alloy plate and accumulator case using same Download PDFInfo
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- CN1448526A CN1448526A CN03107588A CN03107588A CN1448526A CN 1448526 A CN1448526 A CN 1448526A CN 03107588 A CN03107588 A CN 03107588A CN 03107588 A CN03107588 A CN 03107588A CN 1448526 A CN1448526 A CN 1448526A
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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
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- 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
An aluminum alloy sheet and a battery housing using the same. The aluminum alloy sheet comprises, by mass, 0.3-0.7% Si, <=0.2% Fe (provided that a ratio Si/Fe is >=3), 0.4-0.9% Cu, 0.8-1.5% Mn and the balance being Al and impurities, wherein Mg, Zn and Cr contents are each controlled to <=0.01% and Ti content to <=0.03%. The structure shows an excellent molding processability, pressure resistance and weldability and generates no weld crack during pulse laser welding.
Description
Technical field
The present invention relates to be applicable to repeated charge, cell box that can nonexpondable store battery, particularly the aluminium alloy plate of excellent weldability and the accumulator box made of its.
Background technology
In the past, the store battery that can discharge and recharge that is carried as the power supply of mobile phone or individual laptop computer etc., for example in lithium-ions battery, use usually metallic substance such as Nickeled Steel Plate or stainless steel plate are carried out cell box that forming process such as repeatedly the deep-draw manufacturing procedure and the press working of attenuate drawing sequence appropriate combination is made.
Above-mentioned these lithium-ions batteries are required to improve the energy output density of per unit mass in recent years, in order to realize this requirement, just must carry out further miniaturization and lightweight to the cell box (hereinafter to be referred as cell box) of lithium-ions battery.For this reason, for the further miniaturization and the lightness of this cell box,, the light weight that possesses JISA3003 alloy etc. and the aluminium alloy of intensity have been adopted in the part of this cell box.
But, cell box like this, when the charging of carrying out battery and discharge, the cell box internal pressure rises, if use under hot environment, this cell box internal pressure rises bigger.Therefore, cell box expands, distortion, according to circumstances, the breakage of cell box takes place sometimes.Consequently might damage the performance of electronics.
So, as to the desired characteristic of such cell box, can enumerate lithium-ions battery when charging and discharge much less, the situation that imagination is used under hot environment, under such service condition, when the cell box pressure inside rose, cell box can keep the shape at initial stage.On the other hand, should seek miniaturization, lightness and the low expensed of lithium-ions battery, so the thin-walled property of strong request cell box.
Lithium-ions battery, by following operation manufacturing:
(1) positive electrode material, negative material, barrier film is overlapping and curling, put into cell box.
(2) positive pole of electrode materials and negative pole are welded on respectively on the positive pole and negative pole of cell box.
(3) electrolytic solution is injected in the cell box.
(4) spout is sealed up by welding.
And, in the time of envelope cell box spout, use the controlled pulse laser of waveform to weld usually.
, as aluminum alloy materials, when using above-mentioned JISA3003 alloy etc.,, produce welding crack at hermetic unit according to welding conditions applicable to cell box.This welding crack is created in the black variable color position of welding portion.At identical position, checking out Al-Fe-Mn is intermetallics.
In this case, by life-time service, battery charge or when discharge cell box internal pressure one rise, will the problem of electrolytic solution takes place to spill from the welding portion of the hermetic unit that produces above-mentioned welding crack.
As the aluminium alloy plate that accumulator box is used, known spy opens the aluminium alloy plate shown in the 2000-129384., to open in the aluminium alloy plate shown in the 2000-129384 above-mentioned spy, to use necessary anti-welding crack and plasticity in order improving as accumulator box, the optimum content scope of each element is but not very good.So wish to make the aluminium alloy plate of using as accumulator box with better characteristic.
Summary of the invention
Therefore, the present invention puts in view of the above problems and proposes.It is a kind of by pulse laser welding that its purpose is to provide, and forming process, resistance to pressure are good, the accumulator box that the aluminium alloy plate of welding crack, excellent weldability does not take place and use its making.
Present inventors etc. use the JISA3003 alloy, and the result that the reason that produces welding crack is studied with keen determination: checking out Al-Fe-Mn from the black variable color position of welding portion is intermetallics, and infer thus that Here it is and produce some reasons of welding crack.
That is, at welding portion, by pulse laser, aluminium alloy plate is heated to high temperature, becomes molten state, welds normally, and with respect to this, high Al-Fe-Mn is the intermetallics incomplete fusion than aluminium alloy mother metal fusing point, becomes the microsegregation state.Therefore, infer at Al-Fe-Mn to be the position of intermetallics generation microsegregation, the possibility height of welding crack takes place.
Present inventor etc., from such deduction, to satisfying all characteristics as accumulator box, simultaneously, can generate again than Al-Fe-Mn is the aluminium alloy of the low-melting intermetallics of intermetallics, proceed experimental study with keen determination, made aluminium alloy plate that can achieve the above object and the accumulator box that uses its making.
Solve the present invention of above-mentioned problem, it is constructed as follows:
Promptly, a kind of aluminium alloy plate, control Si content is that 0.3～0.7 quality %, Cu content are that 0.4～0.9 quality % and Mn content are 0.8～1.5 quality %, Fe content is below the 0.2 quality %, the ratio of Si/Fe is more than 3, and Mg content is below the 0.01 quality %, and Zn content is below the 0.01 quality %, Cr content is below the 0.01 quality %, and Ti content is below the 0.03 quality %.
Here, maximum length is that Al-Fe-Mn-Si is that the number of intermetallics preferably accounts for more than 50% in the above intermetallics of 5 μ m.
Also have, Si content is more than the 0.4 quality % or be better below 0.65 quality %.
Cu content is more than the 0.5 quality % or be better below the 0.8 quality %.
Mn content is more than the 0.9 quality % or be better below the 1.2 quality %.
As above-mentioned, in the aluminium alloy, both content of Si, Fe by will helping to improve plasticity and the proportional limit system of Si/Fe is rationalized within the limits prescribed and more and rationalize within the limits prescribed and more by Cu, the restriction of Mn content that will help to improve intensity, Mg, the Zn mixed volume that easily disperses by will weld the time limits again, restriction simultaneously forms the Cr of intermetallics, the mixed volume of Ti, and easy melt metal is changed the number of thing mutually more than prescribed value when welding.Because such formation even thin-walled property also can reach the intensity and the plasticity of regulation, and produces the aluminium alloy plate with superior weldability.
Also have, among the present invention, make accumulator box with the aluminium alloy plate of above-mentioned formation.Therefore, accumulator box is being taken in positive electrode material, negative material, barrier film, electrolytic solution, and welding is during spout, because easily fused Al-Fe-Mn-Si is the existence of intermetallics, weldability improves.
Embodiment
Embodiment to aluminium alloy plate of the present invention and accumulator box describes below.
In aluminium alloy plate of the present invention, limit reason, following explanation as the quantity of each element of aluminium alloy:
Si:0.3～0.7 quality %, below the Fe:0.2 quality %, and the ratio of Si/Fe: the reason more than 3
In aluminium alloy plate, it is that the low-melting Al-Fe-Mn-Si of intermetallics is an intermetallics that Si, Fe, Mn, Al together generate than Al-Fe-Mn, and the effect that suppresses welding crack is arranged.Si also has the effect that improves plasticity simultaneously., if Si addition less than 0.3 quality %, then its effect diminishes, and on the other hand, addition one surpasses 0.7 quality %, and thickization of intermetallics then becomes the starting point of the crackle when being shaped, and plasticity reduces easily.Therefore, the Si addition is 0.3～0.7 quality %, is preferably 0.4～0.65 quality %.
Fe in aluminium alloy plate is the same with Si, generates same intermetallics, and therefore the effect that improves plasticity is arranged., if iron Fe addition surpasses 0.2 quality %, thickization of intermetallics then becomes the starting point of the crackle when being shaped easily and plasticity reduced.Therefore, the Fe addition is below the 0.2 quality %.
And then in above-mentioned compositing range, during the ratio less than 3 of Si/Fe, the Al-Fe-Mn that fusing point is high is that intermetallics increases, and easily produces welding crack.Add thickization of intermetallics, plasticity reduces.So the ratio of Si/Fe is more than 3.The reason of Cu:0.4～0.9 quality % scope
Copper Cu in aluminium alloy plate has the aluminium alloy plate of raising intensity, when being processed into box, the effect that improves this box compressive strength is arranged.If copper Cu addition less than 0.4 quality %, then this effect diminishes, and on the other hand, if addition surpasses 0.9 quality %, then the plasticity of aluminium alloy plate descends.Also have, when making cell box, when box main body part and spout are adhered with the pulse laser welding, easily crack at welding portion with its.Therefore, the Cu addition is 0.4～0.9 quality %, and best scope is 0.5～0.8 quality %.The reason of Mn:0.8～1.5 quality % scopes
Mn in aluminium alloy plate is solid-solubilized in the parent phase, and the effect that improves aluminium alloy plate intensity is arranged.If manganese Mn addition less than 0.8 quality %, then this effect diminishes, and on the other hand, if addition surpasses 1.5 quality %, then generates thick intermetallics.When making cell box with this aluminium alloy plate, it easily becomes the starting point of the crackle when being shaped, thereby plasticity descends.So the Mn addition is 0.8～1.5 quality %, best scope is 0.9～1.2 quality %.
Below, illustrate impurity Mg, Zn, Cr, Ti are limited to its reason below prescribed value.The Mg addition is limited in the following reason of 0.01 quality %
Mg in aluminium alloy plate can improve the intensity of aluminium alloy plate, when it is used in cell box, the effect that improves this box compressive strength is arranged.,, then, easily disperse during welding, pollute surrounding environment,, easily generate welding crack when then pulse laser welds if addition is more because Mg steam forces down if the Mg addition surpasses 0.01 quality %.So the Mg addition is limited in below the 0.01 quality %.Zn: be limited in the following reason of 0.01 quality %
Zinc Zn in aluminium alloy plate, Mg is the same with magnesium, and the effect of the intensity that improves aluminium alloy plate is arranged., zinc Zn steam forces down, and easily disperses during welding, pollutes surrounding environment, so zinc Zn addition is limited in below the 0.01 quality %.Cr: be limited in the following reason of 0.01 quality %
Chromium Cr in aluminium alloy plate has the effect of the intensity that improves aluminium alloy plate too.,, then generate in a large number, and welding crack takes place as dystectic Al-Fe-Cr intermetallics if chromium Cr addition surpasses 0.01 quality %.So chromium Cr addition is limited in below the 0.01 quality %.Ti: be limited in the following reason of 0.03 quality %
Titanium Ti in aluminium alloy plate, when making ingot bar, the effect of handlebar solidified structure miniaturization.,, then generate the Al-Ti intermetallics, and welding crack takes place if titanium Ti addition surpasses 0.03 quality %.So the Ti addition is limited in below the 0.03 quality %.
Below, ideal intermetallics state is described.Above-mentioned each component is correspondingly carried out necessary heat bundle, cold bundle, annealing, rectification, make aluminium alloy plate.
Here, in the aluminium alloy plate of making, maximum length is that the Al-Fe-Mn-Si in the above intermetallics of 5 μ m is that the number of intermetallics preferably accounts for more than 50%.
Al-Fe-Mn-Si is an intermetallics than Al-Fe-Mn is that the fusing point of intermetallics is low.So, when welding with pulse laser, easy and aluminium alloy mother metal fusion together, the welding portion of formation homogeneous.
, maximum length is in the above intermetallics of 5 μ m, when Al-Fe-Mn-Si is the number less than 50% of intermetallics, consequently, having generated the higher Al-Fe-Mn of many fusing points is intermetallics, and when welding with pulse laser, they bring out welding crack because of microsegregation.Therefore, maximum length is that Al-Fe-Mn-Si is that the number of intermetallics preferably accounts for more than 50% in the above intermetallics of 5 μ m.
For realize that maximum length is that Al-Fe-Mn-Si is that the number of intermetallics accounts for the state 50% or more, with the aluminium alloy with this paper regulation composition, makes, and can both realize without doubt in the intermetallics more than the 5 μ m under common condition.As typical manufacture method, can enumerate, have ingot bar that this patent forms homogenize handle after, carry out heat bundle, carry out cold bundle at last, its cold bundle working modulus is 25～70%.But be not limited to this, for example, also can anneal midway at cold bundle.
Welding crack, aluminium alloy plate that the paired pulses laser welding is good do not take place by satisfying above condition, can making, and, can make the good accumulator box of resistance to pressure with it.
Accumulator box is, by the blank plate of the die-cut regulation area of the above-mentioned aluminium alloy plate that constitutes, carries out the processing of attenuate pull and stretch then, to form the sidewall height of regulation, through each processing such as corresponding necessary deburrings, made container-like main part again.And, curl positive electrode material, negative material, barrier film are overlapping, be accommodated in the inside of container-like main part, and then, the positive pole of electrode materials and negative pole are welded on respectively on the positive pole and negative pole of container-like main part, inject electrolytic solution then, close the lid in spout, and seal up with the welding of the controlled pulse laser of waveform, make lithium-ions battery.
Below, embodiments of the invention are described, still, the present invention has more than and is limited to following embodiment.(embodiment 1)
To have the composition shown in the table 1, all the other are by the processing that homogenizes of aluminium and aluminium alloy ingot bar that unavoidable impurities constituted.Then, carry out heat and prick, the rate of pricking out is to carry out cold bundle at 50% o'clock.Make the aluminium alloy plate that thickness of slab is 0.3mm.
Then, to the aluminium alloy plate of such making, under the following conditions, carry out tension test, make the forming process test, welding test of cell box shape and the withstand voltage test after the cell box sealing.And obtain the kind and the number of intermetallics.(tension test)
To above-mentioned aluminium alloy plate, draw direction is parallel with the rolling direction, makes the tension test sheet according to JIS5 number.Then, implement test, obtain tensile strength, proof stress and elongation according to JIS Z2241.(kind of intermetallics, size and number)
After the surface treatment that above-mentioned aluminium alloy plate is stipulated, with the relation between kind, size and number with scanning electronic microscope (ScanningElectron Microscope) (multiplying power=1000 times) the investigation intermetallics that can spectrometer (Energy Dispersive Spectrometer) that looses.Carry out aforesaid operations respectively for each aluminium alloy under 50 visuals field, obtaining maximum length is the kind and the number of the above intermetallics of 5 μ m.(forming process test)
Suppose it is the lithium-ions battery box, the extrusion processing rate of sidewall as 50%, is made the rectangular box of long 5mm, wide 30mm, high 50mm.At this moment, what can be shaped is that plasticity is good, as no problem being evaluated as " zero ", take place crackle or surface scraggly as plasticity bad be evaluated as " * ".(welding test)
On the top of above-mentioned rectangular box, the lid of being made by same aluminium alloy plate is welded with pulse laser.Cannot see defectives, intact such as crackle at welding portion, and each welding bead (bead) shape of pulse is certain being evaluated as " ◎ ", cannot see defective, intact at welding portion, but some at random being evaluated as " zero " of weld bead shape, at welding portion generation crackle, perhaps because being evaluated as of solute element evaporative emission surrounding environment " * ".(withstand voltage test)
After the rectangular box sealing, at 294Kpa (3Kg/Cm
2) under the effect of pressing, be heated to 100 ℃, keep getting back to room temperature after 2 hours.Measure the lateral dilatational strain of o box position then.This dilatational strain position is below 0.8mm, fabulous as withstand voltage properties, be evaluated as " ◎ ", will be above 0.8mm and below 1.0mm, as good pressure-resistant performance, be evaluated as " zero ", surpass 1.0mm, as bad, be evaluated as " * ".
Above evaluation result is illustrated in the table 2.Can know from table 2, in specific compositing range, can obtain the aluminium alloy plate and the lithium-ions battery box of excellent weldability.In an embodiment, maximum length is that Al-Fe-Mn-Si is that the number of intermetallics accounts for more than 50% in the above intermetallics of 5 μ m as can be known.
Table 1
| The alloy sequence number | Alloy composition quality % | |||||||||
| ??Si | ??Fe | The Si/Fe ratio | ??Cu | ??Mn | ?Mg | ?Zn | ?Cr | ???Ti | ||
| Embodiment | ????1 | ??0.5 | ??0.15 | ????3.3 | ??0.6 | ??1.1 | ?- | ?- | ??- | ??0.02 |
| ????2 | ??0.4 | ??0.1 | ????4 | ??0.6 | ??1.1 | ?- | ?- | ??- | ??0.02 | |
| ????3 | ??0.5 | ??0.05 | ????10 | ??0.6 | ??1.1 | ?- | ?- | ??- | ??0.02 | |
| ????4 | ??0.5 | ??0.15 | ????3.3 | ??0.4 | ??1.1 | ?- | ?- | ??- | ??0.02 | |
| ????5 | ??0.5 | ??0.15 | ????3.3 | ??0.8 | ??1.1 | ?- | ?- | ??- | ??0.02 | |
| ????6 | ??0.5 | ??0.15 | ????3.3 | ??0.6 | ??0.9 | ?- | ?- | ??- | ??0.02 | |
| ????7 | ??0.5 | ??0.15 | ????3.3 | ??0.6 | ??1.4 | ?- | ?- | ??- | ??0.02 | |
| Comparative example | ????1 | ??0.2 | ??0.15 | ????1.3 | ??0.6 | ??1.1 | ?- | ?- | ??- | ??0.02 |
| ????2 | ??0.8 | ??0.15 | ????5.3 | ??0.6 | ??1.1 | ?- | ?- | ??- | ??0.02 | |
| ????3 | ??0.5 | ??0.3 | ????1.7 | ??0.6 | ??1.1 | ?- | ?- | ??- | ??0.02 | |
| ????4 | ??0.4 | ??0.15 | ????2.7 | ??0.6 | ??1.1 | ?- | ?- | ??- | ??0.02 | |
| ????5 | ??0.5 | ??0.15 | ????3.3 | ??0.3 | ??1.1 | ?- | ?- | ??- | ??0.02 | |
| ????6 | ??0.5 | ??0.15 | ????3.3 | ??1.0 | ??1.1 | ?- | ?- | ??- | ??0.02 | |
| ????7 | ??0.5 | ??0.15 | ????3.3 | ??0.6 | ??0.7 | ?- | ?- | ??- | ??0.02 | |
| ????8 | ??0.5 | ??0.15 | ????3.3 | ??0.6 | ??1.6 | ?- | ?- | ??- | ??0.02 | |
| ????9 | ??0.5 | ??0.15 | ????3.3 | ??0.6 | ??1.1 | ?0.05 | ?- | ??- | ??0.02 | |
| ????10 | ??0.5 | ??0.15 | ????3.3 | ??0.6 | ??1.1 | ?- | ?0.05 | ??- | ??0.02 | |
| ????11 | ??0.5 | ??0.15 | ????3.3 | ??0.6 | ??1.1 | ?- | ?- | ??0.05 | ??0.02 | |
| ????12 | ??0.5 | ??0.15 | ????3.3 | ??0.6 | ??1.1 | ?- | ?- | ??- | ??0.04 | |
Table 2
| The alloy sequence number | Tensile strength N/mm 2 | Proof stress N/mm 2 | Elongation % | Maximum length is the above intermetallics % of 5 μ m | The forming process test | Welding test | Withstand voltage test | ||||
| ????Al-Fe- ????Mn | ????Al-Fe- ????Mn-Si | ????Al-Mn- ????Si | ?Al-Mn | ||||||||
| Embodiment | 1 | ?225 | ?220 | ?2 | ????3 | ????85 | ????12 | ????- | ○ | ◎ | ○ |
| 2 | ?220 | ?214 | ?2 | ????2 | ????90 | ????8 | ????- | ○ | ◎ | ○ | |
| 3 | ?223 | ?219 | ?2 | ????- | ????94 | ????6 | ????- | ○ | ◎ | ○ | |
| 4 | ?214 | ?208 | ?3 | ????2 | ????86 | ????12 | ????- | ○ | ◎ | ○ | |
| 5 | ?238 | ?234 | ?2 | ????2 | ????87 | ????11 | ????- | ○ | ○ | ◎ | |
| 6 | ?220 | ?215 | ?3 | ????2 | ????85 | ????13 | ????- | ○ | ◎ | ○ | |
| 7 | ?233 | ?230 | ?2 | ????3 | ????86 | ????7 | ????4 | ○ | ○ | ◎ | |
| Comparative example | 1 | ?218 | ?214 | ?3 | ????62 | ????36 | ????2 | ????- | × | × | - |
| 2 | ?232 | ?228 | ?1 | ????2 | ????92 | ????6 | ????- | × | ○ | - | |
| 3 | ?225 | ?221 | ?2 | ????29 | ????65 | ????6 | ????- | × | ○ | - | |
| 4 | ?219 | ?215 | ?2 | ????48 | ????48 | ????4 | ????- | × | × | - | |
| 5 | ?207 | ?202 | ?3 | ????4 | ????84 | ????12 | ????- | ○ | ○ | × | |
| 6 | ?245 | ?241 | ?1 | ????4 | ????86 | ????10 | ????- | × | ○ | - | |
| 7 | ?209 | ?204 | ?3 | ????8 | ????82 | ????10 | ????- | ○ | ○ | × | |
| 8 | ?238 | ?233 | ?1 | ????2 | ????88 | ????4 | ????6 | × | ○ | - | |
| 9 | ?230 | ?226 | ?2 | ????4 | ????85 | ????11 | ????- | ○ | × | ○ | |
| 10 | ?226 | ?222 | ?2 | ????5 | ????84 | ????11 | ????- | ○ | × | - | |
| 11 | ?225 | ?221 | ?2 | ????3 | ????85 | ????12 | ????- | ○ | × | - | |
| 12 | ?228 | ?224 | ?2 | ????4 | ????84 | ????12 | ????- | ○ | × | - | |
Shown in table 1, table 2, in comparative example 1, the ratio of the addition of Si and Si/Fe is outside the scope of regulation, and the evaluation of forming process test is poor, can not adopt.In comparative example 2, because of the addition of Si outside the scope of regulation, so forming process is poor, can not adopt.In comparative example 3, because of the ratio of the addition of Fe and Si/Fe outside the scope of regulation, so the evaluation of forming process test is poor, can not adopt.
In comparative example 4, the ratio of Si/Fe is outside the scope of regulation, and the evaluation of forming process test is poor, can not adopt.In comparative example 5, the addition of Cu very few and the regulation scope outside, so the evaluation of withstand voltage test is poor, can not adopt.In comparative example 6, the addition of Cu too much outside the scope of regulation, so the evaluation of forming process test is poor, can not adopt.In comparative example 7, the addition of Mn very few and the regulation scope outside, so the evaluation of withstand voltage test is poor, can not adopt.In comparative example 8, the addition of Mn too much outside the scope of regulation, so the evaluation of forming process test is poor, can not adopt.In comparative example 9～comparative example 12, the addition of Mg, Zn, Cr, Ti too much outside the scope of regulation, so welding test is poor as a result, can not adopt respectively.(embodiment 2)
To have the component shown in the table 3, all the other are by the processing that homogenizes of aluminium and aluminium alloy ingot bar that unavoidable impurities constituted.Then, carry out heat and prick, the rate of pricking out is to carry out cold bundle at 50% o'clock.Make the aluminium alloy plate that thickness of slab is 0.3mm.
Table 3
| The alloy sequence number | Alloy composition quality % | |||||||||
| ??Si | ??Fe | The Si/Fe ratio | ??Cu | ??Mn | ??Mg | ??Zn | ??Cr | ??Ti | ||
| Embodiment | ????8 | ??0.6 | ??0.12 | ????5.0 | ??0.6 | ??1.1 | ??- | ??- | ??- | ??0.02 |
| ????9 | ??0.4 | ??0.12 | ????3.3 | ??0.6 | ??1.1 | ??- | ??- | ??- | ??0.02 | |
| Comparative example | ????13 | ??0.8 | ??0.12 | ????6.6 | ??0.6 | ??1.1 | ??- | ??- | ??- | ??0.02 |
| ????14 | ??0.2 | ??0.12 | ????1.7 | ??0.6 | ??1.1 | ??- | ??- | ??- | ??0.02 | |
Then, to the aluminium alloy plate of such making, under the condition identical, carry out tension test, make the withstand voltage test after forming process test, welding test and the cell box sealing of cell box shape with embodiment 1.
Evaluation result is as shown in table 4.
Table 4
| The alloy sequence number | Tensile strength N/mm 2 | Proof stress N/mm 2 | Elongation % | Maximum length is the above intermetallics % of 5 μ m | The forming process test | Welding test | Withstand voltage test | ||||
| ??Al-Fe- ????Mn | ??Al-Fe- ??Mn-Si | ??Al- ??Mn-Si | ??Al-Mn | ||||||||
| Embodiment | ??8 | ????226 | ????221 | ??2 | ????1 | ????92 | ????7 | ???- | ??○ | ?○ | ?○ |
| ??9 | ????221 | ????217 | ??3 | ????3 | ????88 | ????2 | ???- | ??○ | ?○ | ?○ | |
| Comparative example | ?13 | ????230 | ????225 | ??1 | ????3 | ????94 | ????3 | ???- | ??× | ?○ | ??- |
| ?14 | ????224 | ????220 | ??1 | ????56 | ????40 | ????4 | ???- | ??○ | ?× | ??- | |
Shown in table 3, table 4, even the content of Fe, Cu, Mn and Ti is certain, since the variation of Si content, i.e. the variation of the ratio of Si/Fe, and the characteristic of the aluminium alloy plate that makes also changes thereupon.In comparative example 13, excessive outside the scope of regulation because of the ratio of Si/Fe, the evaluation of forming process test is poor, so can not adopt.In comparative example 14, too small outside the scope of regulation because of the ratio of Si/Fe, the evaluation of welding test is poor, so can not adopt.As can be known from these results, the ratio of Si/Fe being adjusted to optimum scope is to make the important prerequisite that has as the aluminium alloy plate of the appropriate characteristics of accumulator box.As can be known, maximum length is that Al-Fe-Mn-Si is that the number of intermetallics accounts for more than 50% in the above intermetallics of 5 μ m from embodiment 8 and 9.
Claims (9)
1, a kind of aluminium alloy plate, wherein, control Si content is that 0.3～0.7 quality %, Cu content are that 0.4～0.9 quality % and Mn content are 0.8～1.5 quality %; Fe is below the 0.2 quality %, and the ratio of Si/Fe is more than 3; Mg is below the 0.01 quality %, and Zn is below the 0.01 quality %, and Cr is below the 0.01 quality % and Ti is below the 0.03 quality %.
2, aluminium alloy plate according to claim 1, wherein maximum length is that Al-Fe-Mn-Si is that the number of intermetallics accounts for more than 50% in the above intermetallics of 5 μ m.
3, aluminium alloy plate according to claim 1, wherein the content of Si is 0.4～0.7 quality %.
4, aluminium alloy plate according to claim 1, wherein the content of Si is 0.3～0.65 quality %.
5, aluminium alloy plate according to claim 1, wherein the content of Cu is 0.5～0.9 quality %.
6, aluminium alloy plate according to claim 1, wherein the content of Cu is 0.4～0.8 quality %.
7, aluminium alloy plate according to claim 1, wherein the content of Mn is 0.9～1.5 quality %.
8, aluminium alloy plate according to claim 1, wherein the content of Mn is 0.8～1.2 quality %.
9, a kind of accumulator box is characterized in that, is to be formed by the described aluminium alloy plate of claim 1～8.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2002097399 | 2002-03-29 | ||
| JP2002097399 | 2002-03-29 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN1448526A true CN1448526A (en) | 2003-10-15 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN03107588A Pending CN1448526A (en) | 2002-03-29 | 2003-03-28 | Aluminum alloy plate and accumulator case using same |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101538665B (en) * | 2008-03-19 | 2011-01-05 | 株式会社神户制钢所 | Aluminum alloy plate for battery box and manufacturing method thereof |
| CN101469386B (en) * | 2007-04-12 | 2011-01-26 | 日本轻金属株式会社 | Aluminum alloy sheet for battery cover and its production method |
| CN102206775A (en) * | 2010-03-30 | 2011-10-05 | 株式会社神户制钢所 | Aluminum alloy plate for cell box and cell box |
| CN112725661A (en) * | 2020-12-24 | 2021-04-30 | 亚太轻合金(南通)科技有限公司 | Aluminum alloy with strong corrosion resistance and preparation method thereof |
-
2003
- 2003-03-28 CN CN03107588A patent/CN1448526A/en active Pending
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101469386B (en) * | 2007-04-12 | 2011-01-26 | 日本轻金属株式会社 | Aluminum alloy sheet for battery cover and its production method |
| CN102136554B (en) * | 2007-04-12 | 2014-10-01 | 日本轻金属株式会社 | Aluminum alloy sheet for battery cover and its production method |
| CN101538665B (en) * | 2008-03-19 | 2011-01-05 | 株式会社神户制钢所 | Aluminum alloy plate for battery box and manufacturing method thereof |
| CN102206775A (en) * | 2010-03-30 | 2011-10-05 | 株式会社神户制钢所 | Aluminum alloy plate for cell box and cell box |
| CN112725661A (en) * | 2020-12-24 | 2021-04-30 | 亚太轻合金(南通)科技有限公司 | Aluminum alloy with strong corrosion resistance and preparation method thereof |
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