CN109371291A - New energy resource power battery shell and the lid preparation method of aluminum alloy materials - Google Patents
New energy resource power battery shell and the lid preparation method of aluminum alloy materials Download PDFInfo
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- CN109371291A CN109371291A CN201811396757.1A CN201811396757A CN109371291A CN 109371291 A CN109371291 A CN 109371291A CN 201811396757 A CN201811396757 A CN 201811396757A CN 109371291 A CN109371291 A CN 109371291A
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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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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C1/00—Making non-ferrous alloys
- C22C1/02—Making non-ferrous alloys by melting
- C22C1/026—Alloys based on aluminium
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C1/00—Making non-ferrous alloys
- C22C1/02—Making non-ferrous alloys by melting
- C22C1/03—Making non-ferrous alloys by melting using master alloys
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C1/00—Making non-ferrous alloys
- C22C1/06—Making non-ferrous alloys with the use of special agents for refining or deoxidising
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22F—CHANGING THE PHYSICAL STRUCTURE OF NON-FERROUS METALS AND NON-FERROUS ALLOYS
- C22F1/00—Changing the physical structure of non-ferrous metals or alloys by heat treatment or by hot or cold working
- C22F1/04—Changing the physical structure of non-ferrous metals or alloys by heat treatment or by hot or cold working of aluminium or alloys based thereon
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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
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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
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Abstract
The invention discloses the preparation methods of a kind of new energy resource power battery shell and lid aluminum alloy materials, are related to new energy battery technology field, comprising the following steps: 1) melting；2) it refines, skim, online degasification；3) semi-continuous casting；4) sawing, milling face, homogenization；5) it rolls；6) it anneals；7) cleaning, finishing, aligning；New energy resource power battery shell and lid aluminium alloy high comprehensive performance of the invention, it is improved and optimizated by the globality to al alloy component, content and preparation process, keep new energy resource power battery shell obtained and lid products application performance boost significant, especially substantive breakthroughs are reached in terms of tensile strength, Proof strength of non-proportional, elongation after fracture, stability, stampability, welding performance index, application and field are extensive, can meet urgent need of the new energy market to high-performance power battery lid shell product significantly.
Description
Technical field
The present invention relates to new energy battery technology fields, and in particular to a kind of new energy resource power battery shell and lid use aluminium alloy
The preparation method of material.
Background technique
As new energy technology is grown rapidly, the application of new energy electric power automobile is relatively broad, has
It is pollution-free, noise is low, does not generate the excellent characteristics such as exhaust pollution, the cleaning to environmental protection and air be it is highly beneficial, it is several
It is " no pollution ", and the noise that electric car is generated without internal combustion engine, to the sense of hearing of human body, nerve, angiocarpy, digestion, interior point
Secrete, caused by immune system harm it is small, in addition, electric power energy source of car is high-efficient, especially in city operations, automobile is taken a walk
Stop, travel speed is not high, and new-energy automobile is more suitable for.Reach said effect to be able to achieve, is provided for new-energy automobile
The vehicle power supply battery of power has become core key, and the punching process deflection of battery case is big, punching passage is more, production process
Complexity proposes very high request to comprehensive performance especially deep drawability, the laser weldability of material, does not require nothing more than material tool
Have small thickness deviation, good surface quality, at the same also need to have good plasticity, small yield tensile ratio, earing rate low and
Excellent laser weldability is to guarantee safety and reliability of battery during military service.Current existing battery material is also
Required new energy product requirement can not be fully met, the defects of that there are deep drawabilities is poor, earing rate is high, laser weldability is poor.
The patent application of Publication No. CN107502787A discloses a kind of new energy battery cover explosion-proof valve aluminum alloy strip
Material and preparation method thereof, the constituent of the aluminium alloy strips are as follows: Fe 1.2%-1.8%, Mn 0.25%-0.6%, Si
0.05%-0.25%, Ti 0.005%-0.1%, Cu+Mg+Zn≤0.2%, surplus are Al and inevitable impurity.Finished product is brilliant
Within 25 μm, metallic compound full-size is controlled within 25 μm for grain average-size control.Aluminium alloy strips thickness deviation
Control is within ± 2%.This kind of battery cover explosion-proof valve aluminium alloy strips, which have, stablizes burst pressure and good laser weldability
Can, but its deep drawability is poor, earing rate is low, and application is restricted.
The patent application of Publication No. CN106119615A discloses a kind of new energy resource power battery shell aluminium alloy strips
And preparation method thereof, the constituent of the aluminium alloy strips are as follows: Si 0.1-0.4wt%, Fe 0.4-0.7wt%, Cu 0.06-
0.14wt%, Mn 1.0-1.2wt%, Mg < 0.05wt%, Ti 0.01-0.03wt%, surplus Al.Its aluminium alloy obtained
Band has good deep drawability and laser welding, can preferably solve the problems, such as mentioned above, but its globality
It can be still wait improve.
Summary of the invention
The purpose of the present invention is to provide the preparation methods of a kind of new energy resource power battery shell and lid aluminum alloy materials, should
Kind aluminum alloy materials high comprehensive performance, application are good.
In order to achieve the above object, the present invention is achieved through the following technical solutions:
New energy resource power battery shell and the lid preparation method of aluminum alloy materials, follow the steps below:
Step 1: taking aluminium ingot, required aluminium intermediate alloy ingot and metal simple-substance to be delivered to smelting furnace, successively carry out melting, essence
It refines, skim, online degasification, obtaining molten metal, the temperature of the refining is 740-750 DEG C；
Step 2: the molten metal that step 1 is obtained, which is delivered in crystallizer, carries out semi-continuous casting, casting temperature 725-
735 DEG C, casting speed 60-80mm/min obtains aluminium alloy flat bloom；
Step 3: by aluminium alloy flat bloom behind sawing, milling face, carrying out following Homogenization Treatments: first with 180-200 DEG C/h's
Rate is warming up to 195-205 DEG C, and keeps the temperature 40-50min；It is warming up to 375-385 DEG C with the rate of 100-120 DEG C/h again, and is protected
Warm 1-1.5h；It is warming up to 525-535 DEG C with the rate of 80-100 DEG C/h later, and keeps the temperature 2-2.5h；Then again with 60-80 DEG C/h
Rate be warming up to 605-615 DEG C, and keep the temperature 1.5-2h；After being air-cooled to 355-365 DEG C, then with the rate liter of 100-120 DEG C/h
Temperature keeps the temperature 1.5-2h to 565-575 DEG C；After air-cooled to 155-165 DEG C, then 600- is warming up to the rate of 80-100 DEG C/h
610 DEG C, and keep the temperature 1-1.5h；Finally cooled down with the rate of 40-60 DEG C/h, and is 465-475 DEG C and 215- in temperature
225 DEG C keep the temperature 4-5h, 3-3.5h respectively；
Step 4: hot rolling of coming out of the stove, hot rolling include hot roughing and hot finishing, and the temperature of hot roughing is 435-445 DEG C, hot finishing
Temperature be 315-325 DEG C；In the hot rough rolling process, at least through 10 passes, before carrying out hot finishing process, hot rolling
It rolls up thickness and processes pre- allowance in 40-50%；
Step 5: the plate after hot rolling being subjected to first time annealing, annealing temperature is 410-420 DEG C, and soaking time is
4-4.5h；
Step 6: plate being cooled to subzero 25 DEG C to subzero 35 DEG C with the rate of 50-60 DEG C/h, the temperature is kept to carry out
Multi-pass cold rolling manipulation, and cold rolling reduction ratio >=10% per pass, until reaching battery case and covering required plate or band
Thickness；
Step 7: by the plate after cold rolling or making annealing treatment for second of band progress, annealing temperature is 305-315 DEG C, is protected
The warm time is 6-7h；
Step 8: cleaning, finishing, aligning.
Preferably, the refining agent that above-mentioned refining uses is potassium fluoroaluminate, magnesium chloride, aluminum fouoride, precipitated calcium carbonate four
Kind ingredient is according to mass ratio (4-5.5): (2.5-4): (1-3): what (1-2) merging obtained.
Further, above-mentioned refining is purged using argon gas furnace bottom and is refined, refining time 20-25min.
Further, in above-mentioned semi-continuous casting, molten metal applies low frequency electromagnetic field after diversion channel flows into crystallizer, low
Frequency EM frequencies are 30-50Hz, intensity 6000-10000AT.
Further, the preparation method of above-mentioned new energy resource power battery shell and lid aluminum alloy materials according to the following steps into
Row:
Step 1: taking aluminium ingot, required aluminium intermediate alloy ingot and metal simple-substance to be delivered to smelting furnace, successively carry out melting, essence
It refines, skim, online degasification, obtaining molten metal, the temperature of the refining is 745 DEG C；
Step 2: the molten metal that step 1 is obtained, which is delivered in crystallizer, carries out semi-continuous casting, casting temperature 730
DEG C, casting speed 70mm/min obtains aluminium alloy flat bloom；
Step 3: by aluminium alloy flat bloom behind sawing, milling face, carrying out following Homogenization Treatments: first with the rate of 190 DEG C/h
200 DEG C are warming up to, and keeps the temperature 45min；380 DEG C are warming up to the rate of 110 DEG C/h again, and keeps the temperature 1.25h；Later with 90 DEG C/h
Rate be warming up to 530 DEG C, and keep the temperature 2.25h；Then 610 DEG C are warming up to the rate of 70 DEG C/h again, and keep the temperature 1.75h；It is empty
After being cooled to 360 DEG C, then with the rate of 110 DEG C/h 570 DEG C are warming up to, and keep the temperature 1.75h；After air-cooled to 160 DEG C, then with 90 DEG C/h
Rate be warming up to 605 DEG C, and keep the temperature 1.25h；Finally cooled down with the rate of 50 DEG C/h, and temperature be 470 DEG C and
220 DEG C keep the temperature 4.5h, 3.25h respectively.
Step 4: hot rolling of coming out of the stove, hot rolling include hot roughing and hot finishing, in hot rough rolling process, by 12 passes, and
The temperature of hot roughing is 440 DEG C, before hot finishing, and hot rolled coil thickness is processed pre- allowance and needed to control 45%, and hot finishing
Temperature is 320 DEG C；
Step 5: the plate after hot rolling being subjected to first time annealing, annealing temperature is 415 DEG C, and soaking time is
4.25h；
Step 6: plate being cooled to subzero 30 DEG C with the rate of 55 DEG C/h, the temperature is kept to carry out multi-pass cold rolling behaviour
Make, and cold rolling reduction ratio >=10% per pass, until reaching battery case and covering required plate or the thickness of band；
Step 7: by after cold rolling plate or band carry out second and make annealing treatment, annealing temperature is 310 DEG C, when heat preservation
Between be 6.5h；
Step 8: finally product is cleaned, finishing, aligning etc. are handled.
Further, above-mentioned aluminum alloy materials are made of following components by weight percentage: Si:0.36%, Mg:
0.62%, Sr:0.23%, Mn:0.72%, Be:0.21%, Zr:0.18%, Sb:0.16%, Er:0.13%, Pr:0.05%,
Tb:0.03%, Dy:0.06%, B:0.004%, Ga:0.002%, surplus Al.
Further, above-mentioned refining is purged using argon gas furnace bottom and is refined, refining time 22min.
Further, above-mentioned refining agent is potassium fluoroaluminate, magnesium chloride, four kinds of aluminum fouoride, precipitated calcium carbonate ingredients
Merge according to mass ratio 5:3:2:1.5.
Further, the additive amount of above-mentioned refining agent is the 0.07% of quality of molten metal.
Further, in above-mentioned semi-continuous casting, molten metal applies low frequency electromagnetic field after diversion channel flows into crystallizer,
Low frequency electromagnetic frequency range is 40Hz, intensity 8000AT.
The present invention have it is following the utility model has the advantages that
(1) new energy resource power battery shell of the invention and lid aluminum alloy materials good mechanical performance, tensile strength are reachable
190MPa or more is, it is specified that nonproportional cyclic straining is up to 170MPa or more, and elongation after fracture is up to 18.0% or more；
(2) aluminum alloy materials Erichsen number of the invention is higher, and punching performance is good, and obtained lid shell product earing rate is low, stablizes
Property it is good, consistency is high, and exterior quality is good；
(3) the obtained lid shell material laser weldability of aluminum alloy materials of the invention is excellent, and flawless, stomata produce in welding
Raw, splashing amount is few, and abnormal weldpool incidence is low, and easy to process, preparation cost is cheap.
Specific embodiment
Below with reference to embodiment, further description of the specific embodiments of the present invention, and following embodiment is only used for more
Technical solution of the present invention is clearly demonstrated, and not intended to limit the protection scope of the present invention.
Embodiment 1
The present embodiment is related to a kind of new energy resource power battery shell and lid aluminum alloy materials, this kind of aluminum alloy materials are by following
By weight percentage at being grouped as:
Si:0.32%, Mg:0.58%, Sr:0.20%, Mn:0.67%, Be:0.18%, Zr:0.15%, Sb:
0.12%, Er:0.10%, Pr:0.03%, Tb:0.01%, Dy:0.04%, B:0.003%, Ga:0.001%, surplus Al.
The preparation method of above-mentioned new energy resource power battery shell and lid aluminium alloy plate, band substantially follows the steps below:
Step 1: taking aluminium ingot, required aluminium intermediate alloy ingot and metal simple-substance to be delivered to smelting furnace, successively carry out melting, essence
It refines, skim, online degasification, obtaining molten metal；In step 1, refining is purged using argon gas furnace bottom and is refined, and the temperature of refining is
740 DEG C, refining time 25min, the refining agent for refining selection is potassium fluoroaluminate, magnesium chloride, aluminum fouoride, precipitated calcium carbonate
What four kinds of ingredients merged according to mass ratio 4:2.5:1:1, and additive amount is the 0.06% of quality of molten metal；
Step 2: the molten metal that step 1 is obtained, which is delivered in crystallizer, carries out semi-continuous casting, casting temperature 735
DEG C, casting speed 80mm/min obtains aluminium alloy flat bloom；
In above-mentioned semi-continuous casting, molten metal applies low frequency electromagnetic field, low frequency electromagnetic after diversion channel flows into crystallizer
Frequency range is 50Hz, intensity 10000AT；
Step 3: by aluminium alloy flat bloom behind sawing, milling face, carrying out following Homogenization Treatments: first with the rate of 180 DEG C/h
195 DEG C are warming up to, and keeps the temperature 50min；375 DEG C are warming up to the rate of 100 DEG C/h again, and keeps the temperature 1.5h；Later with 80 DEG C/h
Rate be warming up to 525 DEG C, and keep the temperature 2.5h；Then 605 DEG C are warming up to the rate of 60 DEG C/h again, and keep the temperature 2h；It is air-cooled to
After 355 DEG C, then with the rate of 100 DEG C/h 565 DEG C are warming up to, and keep the temperature 2h；After air-cooled to 155 DEG C, then with the rate of 80 DEG C/h
600 DEG C are warming up to, and keeps the temperature 1.5h；Finally cooled down with the rate of 40 DEG C/h, and is 465 DEG C and 215 DEG C points in temperature
It Bao Wen not 5h, 3.5h.
Step 4: hot rolling of coming out of the stove, hot rolling include hot roughing and hot finishing, in hot rough rolling process, by 10 passes, and
The temperature of hot roughing is 435 DEG C, and before the hot finishing process finally carried out, hot rolled coil thickness processes pre- allowance and needs to control
40%, and the temperature of hot finishing is 315 DEG C；
Step 5: the plate after hot rolling being subjected to first time annealing, annealing temperature is 410 DEG C, and soaking time is
4.5h；
Step 6: plate being cooled to subzero 25 DEG C with the rate of 50 DEG C/h, the temperature is kept to carry out multi-pass cold rolling behaviour
Make, and cold rolling reduction ratio >=10% per pass, and battery case and lid 2.0mm plate or band is made；
Step 7: by after cold rolling plate or band carry out second and make annealing treatment, annealing temperature is 305 DEG C, when heat preservation
Between be 7h；
Step 8: finally product is cleaned, finishing, aligning etc. are handled.
Embodiment 2
The present embodiment is related to a kind of new energy resource power battery shell and lid aluminum alloy materials, this kind of aluminum alloy materials are by following
By weight percentage at being grouped as:
Si:0.36%, Mg:0.62%, Sr:0.23%, Mn:0.72%, Be:0.21%, Zr:0.18%, Sb:
0.16%, Er:0.13%, Pr:0.05%, Tb:0.03%, Dy:0.06%, B:0.004%, Ga:0.002%, surplus Al.
The preparation method of above-mentioned new energy resource power battery shell and lid aluminium alloy plate, band substantially follows the steps below:
Step 1: taking aluminium ingot, required aluminium intermediate alloy ingot and metal simple-substance to be delivered to smelting furnace, successively carry out melting, essence
It refines, skim, online degasification, obtaining molten metal；In step 1, refining is purged using argon gas furnace bottom and is refined, and the temperature of refining is
745 DEG C, refining time 22min, the refining agent for refining selection is potassium fluoroaluminate, magnesium chloride, aluminum fouoride, precipitated calcium carbonate
What four kinds of ingredients merged according to mass ratio 5:3:2:1.5, and additive amount is the 0.07% of quality of molten metal；
Step 2: the molten metal that step 1 is obtained, which is delivered in crystallizer, carries out semi-continuous casting, casting temperature 730
DEG C, casting speed 70mm/min obtains aluminium alloy flat bloom；
In above-mentioned semi-continuous casting, molten metal applies low frequency electromagnetic field, low frequency electromagnetic after diversion channel flows into crystallizer
Frequency range is 40Hz, intensity 8000AT；
Step 3: by aluminium alloy flat bloom behind sawing, milling face, carrying out following Homogenization Treatments: first with the rate of 190 DEG C/h
200 DEG C are warming up to, and keeps the temperature 45min；380 DEG C are warming up to the rate of 110 DEG C/h again, and keeps the temperature 1.25h；Later with 90 DEG C/h
Rate be warming up to 530 DEG C, and keep the temperature 2.25h；Then 610 DEG C are warming up to the rate of 70 DEG C/h again, and keep the temperature 1.75h；It is empty
After being cooled to 360 DEG C, then with the rate of 110 DEG C/h 570 DEG C are warming up to, and keep the temperature 1.75h；After air-cooled to 160 DEG C, then with 90 DEG C/h
Rate be warming up to 605 DEG C, and keep the temperature 1.25h；Finally cooled down with the rate of 50 DEG C/h, and temperature be 470 DEG C and
220 DEG C keep the temperature 4.5h, 3.25h respectively.
Step 4: hot rolling of coming out of the stove, hot rolling include hot roughing and hot finishing, in hot rough rolling process, by 12 passes, and
The temperature of hot roughing is 440 DEG C, and before the hot finishing process finally carried out, hot rolled coil thickness processes pre- allowance and needs to control
45%, and the temperature of hot finishing is 320 DEG C；
Step 5: the plate after hot rolling being subjected to first time annealing, annealing temperature is 415 DEG C, and soaking time is
4.25h；
Step 6: plate being cooled to subzero 30 DEG C with the rate of 55 DEG C/h, the temperature is kept to carry out multi-pass cold rolling behaviour
Make, and cold rolling reduction ratio >=10% per pass, and battery case and lid 4.0mm plate or band is made；
Step 7: by after cold rolling plate or band carry out second and make annealing treatment, annealing temperature is 310 DEG C, when heat preservation
Between be 6.5h；
Step 8: finally product is cleaned, finishing, aligning etc. are handled.
Embodiment 3
The present embodiment is related to a kind of new energy resource power battery shell and lid aluminum alloy materials, this kind of aluminum alloy materials are by following
By weight percentage at being grouped as:
Si:0.41%, Mg:0.66%, Sr:0.25%, Mn:0.78%, Be:0.24%, Zr:0.23%, Sb:
0.20%, Er:0.16%, Pr:0.06%, Tb:0.05%, Dy:0.08%, B:0.005%, Ga:0.004%, surplus Al.
The preparation method of above-mentioned new energy resource power battery shell and lid aluminium alloy plate, band substantially follows the steps below:
Step 1: taking aluminium ingot, required aluminium intermediate alloy ingot and metal simple-substance to be delivered to smelting furnace, successively carry out melting, essence
It refines, skim, online degasification, obtaining molten metal；In step 1, refining is purged using argon gas furnace bottom and is refined, and the temperature of refining is
750 DEG C, refining time 20min, the refining agent for refining selection is potassium fluoroaluminate, magnesium chloride, aluminum fouoride, precipitated calcium carbonate
What four kinds of ingredients merged according to mass ratio 5.5:4:3:2, and additive amount is the 0.08% of quality of molten metal；
Step 2: the molten metal that step 1 is obtained, which is delivered in crystallizer, carries out semi-continuous casting, casting temperature 725
DEG C, casting speed 60mm/min obtains aluminium alloy flat bloom；
In above-mentioned semi-continuous casting, molten metal applies low frequency electromagnetic field, low frequency electromagnetic after diversion channel flows into crystallizer
Frequency range is 30Hz, intensity 6000AT；
Step 3: by aluminium alloy flat bloom behind sawing, milling face, carrying out following Homogenization Treatments: first with the rate of 200 DEG C/h
205 DEG C are warming up to, and keeps the temperature 40min；385 DEG C are warming up to the rate of 120 DEG C/h again, and keeps the temperature 1h；Later with 100 DEG C/h's
Rate is warming up to 535 DEG C, and keeps the temperature 2h；Then 615 DEG C are warming up to the rate of 80 DEG C/h again, and keep the temperature 1.5h；It is air-cooled to 365
After DEG C, then with the rate of 120 DEG C/h 565 DEG C are warming up to, and keep the temperature 1.5h；After air-cooled to 165 DEG C, then with the rate of 100 DEG C/h
610 DEG C are warming up to, and keeps the temperature 1h；Finally cooled down with the rate of 60 DEG C/h, and is 475 DEG C and 225 DEG C of difference in temperature
Keep the temperature 4h, 3h.
Step 4: hot rolling of coming out of the stove, hot rolling include hot roughing and hot finishing, in hot rough rolling process, by 14 passes, and
The temperature of hot roughing is 445 DEG C, and before the hot finishing process finally carried out, hot rolled coil thickness processes pre- allowance and needs to control
50%, and the temperature of hot finishing is 325 DEG C；
Step 5: the plate after hot rolling being subjected to first time annealing, annealing temperature is 420 DEG C, soaking time 4h；
Step 6: plate being cooled to subzero 35 DEG C with the rate of 60 DEG C/h, the temperature is kept to carry out multi-pass cold rolling behaviour
Make, and cold rolling reduction ratio >=10% per pass, and obtains battery case and lid 6.0mm plate or band；
Step 7: by after cold rolling plate or band carry out second and make annealing treatment, annealing temperature is 315 DEG C, when heat preservation
Between be 6h；
Step 8: finally product is cleaned, finishing, aligning etc. are handled.
Comparative example group
"-" indicates that the reduction of certain ingredient in embodiment 1-3 uses in the following table 1；
Table 1
Comparative example 6
This comparative example is related to a kind of new energy resource power battery shell and lid aluminum alloy materials, only deposits relative to embodiment 1
The difference of the refining agent of step 1 during the preparation process, the refining agent that this comparative example uses is potassium fluoroaluminate, magnesium chloride, anhydrous fluorine
Change aluminium, four kinds of ingredients of precipitated calcium carbonate merge according to mass ratio 1:1:1:1.
Comparative example 7
This comparative example is related to a kind of new energy resource power battery shell and lid aluminum alloy materials, only deposits relative to embodiment 2
The difference of step 2 during the preparation process, in semi-continuous casting, this comparative example molten metal is not applied after diversion channel flows into crystallizer
Add low frequency electromagnetic field.
Comparative example 8
This comparative example is related to a kind of new energy resource power battery shell and lid aluminum alloy materials, relative to embodiment 3, reduces
Step 5, remaining is constant.
Comparative example 9
This comparative example is related to a kind of new energy resource power battery shell and lid aluminum alloy materials, relative to embodiment 3, reduces
Step 7, remaining is constant.
Comparative example 10
A kind of new energy resource power battery shell aluminium alloy strips in the prior art, the constituent of the aluminium alloy strips
Are as follows: Si 0.1-0.4wt%, Fe 0.4-0.7wt%, Cu 0.06-0.14wt%, Mn 1.0-1.2wt%, Mg <
0.05wt%, Ti 0.01-0.03wt%, surplus Al.
Performance detection
To new energy resource power battery shell made from above-described embodiment 1-3 and comparative example 1-10 and lid aluminum alloy plate materials band
Material carries out the inspection of following performance project, and the same embodiment or comparative example 2-3 sample of same batch, testing result is taken to see below
Shown in table 2 and table 3:
1, tensile mechanical properties: tensile strength, Proof strength of non-proportional, elongation after fracture item detection sample,
Method and standard are referring to GB/T 16865；
2, earing rate: detection method and standard are referring to GB/T 5125；
3, Erichsen number: detection method and standard are referring to GB/T 4156；
4, laser weldability
4.1, crackle: observing whole weld seam by the regulation of GB/T 22085.2 and GB/T 6417.1, evaluated, and
Crackle includes micro-crack, and micro-crack is observed by 50 times of optical microscopy.
4.2, abnormal weldpool incidence:
4.2.1, abnormal weldpool explanation: if providing the normal weldpool molten wide in some weldpool molten wide >=1.1 times, determine the weldpool
For abnormal weldpool；In addition, normal weldpool molten wide is taken up an official post for a weld seam takes the average value of 30 weldpool molten wides, and weldpool molten wide exists
It is measured on 50 times of light micrograph；
4.2.2, abnormal weldpool incidence is evaluated as follows:
In formula:
Ρ indicates abnormal weldpool incidence, unit %；
N indicates abnormal weldpool total quantity, and unit is a；
N indicates weldpool total quantity, and unit is a.
4.3, it splashes: whole weld seam being observed by the regulation of GB/T 22085.2 and GB/T 6417.1, is evaluated.
4.4, stomata: the welded seam area of 20mm long at two is arbitrarily chosen as evaluation object, edge weldering in fusion length direction
Seam center line is ground, polishes sample preparation, is seen by the regulation of GB/T 22085.2 and GB/T 6417.1 to whole weld seam
It examines, evaluate.
Table 2
Table 3: laser weldability
By 3 test data analyzer of upper table 2 and table, compare it follows that
New energy resource power battery shell and lid aluminium alloy strips and plate high comprehensive performance of the invention, by being closed to aluminium
The globality of golden ingredient, content and preparation process improves and optimizates, and makes new energy resource power battery shell and lid products application obtained
It can be promoted significantly, especially in tensile strength, Proof strength of non-proportional, elongation after fracture, stability, stampability, welding
Substantive breakthroughs are reached in terms of performance indicator, through examining, battery case cap consistency made from this kind of aluminium alloy is good, tensile strength
Up to 190MPa or more, it is specified that nonproportional cyclic straining is up to 170MPa or more, elongation after fracture is up to 18.0% or more, ear processed
Rate is lower than 1.1%, and Erichsen number is greater than 10.00mm, and is excellent in laser weldability detection, and final product quality is high, answers
It is extensive with occasion and field, urgent need of the new energy market to high-performance power battery lid shell product can be met significantly.
The foregoing is only a preferred embodiment of the present invention, is not intended to restrict the invention, although referring to aforementioned reality
Applying example, invention is explained in detail, for those skilled in the art, still can be to aforementioned each implementation
Technical solution documented by example is modified or equivalent replacement of some of the technical features.It is all in essence of the invention
Within mind and principle, any modification, equivalent replacement, improvement and so on be should all be included in the protection scope of the present invention.
Claims (10)
1. the preparation method that new energy resource power battery shell and lid use aluminum alloy materials, which is characterized in that follow the steps below:
Step 1: take aluminium ingot, required aluminium intermediate alloy ingot and metal simple-substance to be delivered to smelting furnace, successively carry out melting, refining,
It skims, online degasification, obtains molten metal, the temperature of the refining is 740-750 DEG C；
Step 2: the molten metal that step 1 is obtained, which is delivered in crystallizer, carries out semi-continuous casting, casting temperature 725-735
DEG C, casting speed 60-80mm/min obtains aluminium alloy flat bloom；
Step 3: by aluminium alloy flat bloom behind sawing, milling face, carrying out following Homogenization Treatments: first with the rate of 180-200 DEG C/h
It is warming up to 195-205 DEG C, and keeps the temperature 40-50min；It is warming up to 375-385 DEG C with the rate of 100-120 DEG C/h again, and keeps the temperature 1-
1.5h；It is warming up to 525-535 DEG C with the rate of 80-100 DEG C/h later, and keeps the temperature 2-2.5h；Then again with the speed of 60-80 DEG C/h
Rate is warming up to 605-615 DEG C, and keeps the temperature 1.5-2h；After being air-cooled to 355-365 DEG C, then it is warming up to the rate of 100-120 DEG C/h
565-575 DEG C, and keep the temperature 1.5-2h；After air-cooled to 155-165 DEG C, then with the rate of 80-100 DEG C/h it is warming up to 600-610 DEG C,
And keep the temperature 1-1.5h；Finally cooled down with the rate of 40-60 DEG C/h, and is 465-475 DEG C and 215-225 DEG C point in temperature
It Bao Wen not 4-5h, 3-3.5h；
Step 4: hot rolling of coming out of the stove, hot rolling include hot roughing and hot finishing, and the temperature of hot roughing is 435-445 DEG C, the temperature of hot finishing
Degree is 315-325 DEG C；In the hot rough rolling process, at least through 10 passes, before carrying out hot finishing process, hot rolled coil is thick
Degree processes pre- allowance in 40-50%；
Step 5: the plate after hot rolling being subjected to first time annealing, annealing temperature is 410-420 DEG C, soaking time 4-
4.5h；
Step 6: plate being cooled to subzero 25 DEG C to subzero 35 DEG C with the rate of 50-60 DEG C/h, the temperature is kept to carry out multiple tracks
Secondary cold rolling manipulation, and cold rolling reduction ratio >=10% per pass, until reaching battery case and covering required plate or the thickness of band；
Step 7: by after cold rolling plate or band carry out second and make annealing treatment, annealing temperature is 305-315 DEG C, when heat preservation
Between be 6-7h；
Step 8: cleaning, finishing, aligning.
2. new energy resource power battery shell according to claim 1 and the lid preparation method of aluminum alloy materials, feature exist
In the refining agent used that refines is four kinds of potassium fluoroaluminate, magnesium chloride, aluminum fouoride, precipitated calcium carbonate ingredients according to matter
Amount is than (4-5.5): (2.5-4): (1-3): what (1-2) merging obtained.
3. new energy resource power battery shell according to claim 1 and the lid preparation method of aluminum alloy materials, feature exist
In the refining is purged using argon gas furnace bottom to be refined, refining time 20-25min.
4. new energy resource power battery shell according to claim 1 and the lid preparation method of aluminum alloy materials, feature exist
In in the semi-continuous casting, molten metal applies low frequency electromagnetic field, low frequency electromagnetic frequency range after diversion channel flows into crystallizer
For 30-50Hz, intensity 6000-10000AT.
5. new energy resource power battery shell according to claim 1 and the lid preparation method of aluminum alloy materials, feature exist
In following the steps below:
Step 1: take aluminium ingot, required aluminium intermediate alloy ingot and metal simple-substance to be delivered to smelting furnace, successively carry out melting, refining,
It skims, online degasification, obtains molten metal, the temperature of the refining is 745 DEG C；
Step 2: the molten metal that step 1 is obtained, which is delivered in crystallizer, carries out semi-continuous casting, and casting temperature is 730 DEG C, casting
Making speed is 70mm/min, obtains aluminium alloy flat bloom；
Step 3: by aluminium alloy flat bloom behind sawing, milling face, carrying out following Homogenization Treatments: first being heated up with the rate of 190 DEG C/h
To 200 DEG C, and keep the temperature 45min；380 DEG C are warming up to the rate of 110 DEG C/h again, and keeps the temperature 1.25h；Later with the speed of 90 DEG C/h
Rate is warming up to 530 DEG C, and keeps the temperature 2.25h；Then 610 DEG C are warming up to the rate of 70 DEG C/h again, and keep the temperature 1.75h；It is air-cooled to
After 360 DEG C, then with the rate of 110 DEG C/h 570 DEG C are warming up to, and keep the temperature 1.75h；After air-cooled to 160 DEG C, then with the speed of 90 DEG C/h
Rate is warming up to 605 DEG C, and keeps the temperature 1.25h；Finally cooled down with the rate of 50 DEG C/h, and is 470 DEG C and 220 DEG C in temperature
4.5h, 3.25h are kept the temperature respectively.
Step 4: hot rolling of coming out of the stove, hot rolling include hot roughing and hot finishing, and in hot rough rolling process, by 12 passes, and heat is thick
The temperature rolled is 440 DEG C, before hot finishing, and hot rolled coil thickness is processed pre- allowance and needed to control 45%, and the temperature of hot finishing
It is 320 DEG C；
Step 5: the plate after hot rolling being subjected to first time annealing, annealing temperature is 415 DEG C, soaking time 4.25h；
Step 6: plate is cooled to subzero 30 DEG C with the rate of 55 DEG C/h, the temperature is kept to carry out multi-pass cold rolling manipulation, and
Cold rolling reduction ratio >=10% per pass, until reaching battery case and covering required plate or the thickness of band；
Step 7: by the plate after cold rolling or making annealing treatment for second of band progress, annealing temperature is 310 DEG C, and soaking time is
6.5h；
Step 8: finally product is cleaned, finishing, aligning etc. are handled.
6. new energy resource power battery shell according to claim 5 and the lid preparation method of aluminum alloy materials, feature exist
In the aluminum alloy materials are made of following components by weight percentage: Si:0.36%, Mg:0.62%, Sr:
0.23%, Mn:0.72%, Be:0.21%, Zr:0.18%, Sb:0.16%, Er:0.13%, Pr:0.05%, Tb:0.03%,
Dy:0.06%, B:0.004%, Ga:0.002%, surplus Al.
7. new energy resource power battery shell according to claim 6 and the lid preparation method of aluminum alloy materials, feature exist
In the refining is purged using argon gas furnace bottom to be refined, refining time 22min.
8. new energy resource power battery shell according to claim 7 and the lid preparation method of aluminum alloy materials, feature exist
In the refining agent is four kinds of potassium fluoroaluminate, magnesium chloride, aluminum fouoride, precipitated calcium carbonate ingredients according to mass ratio 5:3:2:
What 1.5 merging obtained.
9. new energy resource power battery shell according to claim 8 and the lid preparation method of aluminum alloy materials, feature exist
In the additive amount of the refining agent is the 0.07% of quality of molten metal.
10. new energy resource power battery shell according to claim 9 and the lid preparation method of aluminum alloy materials, feature exist
In in the semi-continuous casting, molten metal applies low frequency electromagnetic field, low frequency electromagnetic frequency range after diversion channel flows into crystallizer
For 40Hz, intensity 8000AT.
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| CN111254321A (en) * | 2020-03-17 | 2020-06-09 | 合肥博康金属技术有限公司 | Aluminum alloy material for new energy power battery case and cover and application thereof |
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| CN110137411A (en) * | 2019-04-04 | 2019-08-16 | 河南鑫泉能源科技有限公司 | Explosion rupture disk and its preparation method and application for lithium battery cap |
| CN111254321A (en) * | 2020-03-17 | 2020-06-09 | 合肥博康金属技术有限公司 | Aluminum alloy material for new energy power battery case and cover and application thereof |
| CN111321325A (en) * | 2020-03-17 | 2020-06-23 | 合肥博康金属技术有限公司 | Preparation method of aluminum alloy material for new energy power battery shell and cover |
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