CN107794421A - A kind of high intensity aluminum bronze manganese magnesium samarium alloy for casing of lithium ion battery - Google Patents
A kind of high intensity aluminum bronze manganese magnesium samarium alloy for casing of lithium ion battery Download PDFInfo
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- CN107794421A CN107794421A CN201711029840.0A CN201711029840A CN107794421A CN 107794421 A CN107794421 A CN 107794421A CN 201711029840 A CN201711029840 A CN 201711029840A CN 107794421 A CN107794421 A CN 107794421A
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- Prior art keywords
- alloy
- aluminum bronze
- casing
- manganese magnesium
- ion battery
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Classifications
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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
- C22C21/12—Alloys based on aluminium with copper as the next major constituent
-
- 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
- C22F1/057—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 of alloys with copper as the next major constituent
-
- 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
-
- 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
- H01M50/131—Primary casings, jackets or wrappings of a single cell or a single battery characterised by physical properties, e.g. gas-permeability or size
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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
The invention discloses a kind of high intensity aluminum bronze manganese magnesium samarium alloy for casing of lithium ion battery.The alloy includes：1.4 1.6wt% Cu, 1.2 1.4wt% Mn；0.7 0.9wt% Mg；0.3 0.5wt% Fe；0.2 0.6wt% Sm；Surplus is aluminium and inevitable impurity.The present invention forms substantial amounts of Al by multicomponent microalloying and heat treatment in aluminum bronze manganese magnesium samarium alloy10Cu7Sm2And Al2CuMg strengthens phase, it is obviously improved dural combination property, the tensile strength of aluminum bronze manganese magnesium samarium alloy sheet material is set to be more than 300MPa, elongation percentage is more than 5%, its corrosion potential significantly can regulate and control improve according to samarium content, and the cupping processability and elevated temperature strength of sheet material are better than being free of samarium alloy and other a variety of casing of lithium ion battery alloys.
Description
Technical field
The invention belongs to aluminum alloy materials technical field, is related to a kind of high intensity aluminum bronze manganese for casing of lithium ion battery
Magnesium samarium alloy.
Background technology
Casing of lithium ion battery is the important component of battery, serves not only as a simple sealing container, it is to electricity
The storge quality and security performance in pond also have the function that it is very important, be it is a kind of integrate feature with it is structural new
Functional material.On the one hand, battery case materials must have good electrolyte resistance corrosive nature, case material corrosion resisting property
Quality directly affects the service life of lithium battery；On the other hand, hit, jolt, when fierce concussion when running into,
Housing will bear Strong Impact Loading in short-term.Casing of lithium ion battery material is broadly divided into plastic casing, steel casing, outside Soft Roll
Four kinds of shell and aluminum alloy casing etc..It is the aluminum alloy casing of representative because of its good thermal diffusivity, processing characteristics and resistance to using 3003Al
Corrosion energy and be used for high-end electronic product scope such as notebook computer, tablet personal computer etc..Compared with steel casing, aluminum alloy casing
With high specific strength, be more suitable for the light-weighted requirement of current vehicle, therefore, by the use of aluminum alloy material as sheathing material be vehicle lithium
A kind of trend of ion battery industry development.
Requirement of the Vehicular dynamic battery to sheathing material is mainly with higher intensity, corrosion resistance and preferable group
Heat endurance is knitted, to ensure that the intensity of sheathing material and corrosion resistance are stable in 100 DEG C or so of working environment, and keeps aobvious
Significant change does not occur for appearance and size when the stability of micro-assembly robot is to ensure work.Outside the battery that automobile industry rapid development is brought
Shell is thin-wall light-weighted, high density radiating and high withstand voltage demand then require that developing new high-strength high-elongation ratio battery case aluminium closes
Gold.
The tensile strength for the most of battery case Al-Mn line aluminium alloys (such as 3003Al) applied in the market
Less than 250MPa, and corrosion resistance has much room for improvement.Battery case aluminium alloy patent based on Al-Cu-Mn systems is (such as
CN101358307A, CN102828072A) report tensile strength again smaller than 300MPa.A few patents (such as CN101851715)
Although the battery case intensity of aluminum alloy of report is higher, elongation percentage is generally less than 5%.
Above commercial product and application for a patent for invention be not directed to because Sm elements regulating compound enhancing mutually and corrosion resistance and
It is obviously improved casing of lithium ion battery Al-Cu-Mn-Mg sheet alloy combination properties.
The content of the invention
It is an object of the invention to provide a kind of high intensity aluminum bronze manganese magnesium samarium alloy for casing of lithium ion battery, by containing
Samarium is precipitation hardened and the precipitation hardened effectively lifting dural performance of aluminum bronze magnesium, acquisition have high intensity, high extension
Rate, cupping processability is good, corrosion potential is controllable and the aluminum bronze manganese magnesium samarium alloy sheet material of good heat resistance.
The invention provides a kind of high intensity aluminum bronze manganese magnesium samarium alloy for casing of lithium ion battery, the alloy bag
Contain：1.4-1.6wt% Cu；1.2-1.4wt% Mn；0.7-0.9wt% Mg；0.3-0.5wt% Fe；0.2-
0.6wt% Sm；Surplus is aluminium and inevitable impurity.
The content of the inevitably impurity is less than 0.05wt%.
The alloying component is：
1.5wt% Cu；
1.3wt% Mn；
0.8wt% Mg；
0.4wt% Fe；
0.2-0.4wt% Sm；
Surplus is aluminium and inevitable impurity.
Contain Al in the alloy10Cu7Sm2And Al2CuMg strengthens phase, makes the room temperature tensile of the sheet material of the alloy formation
Intensity is more than 300MPa, and elongation percentage is more than 5%.
The remarkable result of the present invention is the multicomponent microalloying by dural, especially adds certain content
Samarium element and control the content of copper (table 1), make to form substantial amounts of Al in alloy10Cu7Sm2And Al2CuMg strengthens phase.With being not added with
The alloy of samarium is compared, Alloy At Room Temperature intensity and elongation percentage be improved significantly, the tensile strength of sheet alloy reach 300MPa with
On, while can significantly regulate and control corrosion resistance according to samarium content and lift the cupping processability and high-temperature capability (table 2) of alloy.
Embodiment
The embodiment of the present invention will hereafter be illustrated, but the invention is not restricted to these specific embodiment parties
Formula.
The invention provides a kind of high intensity aluminum bronze manganese magnesium samarium alloy for casing of lithium ion battery, the alloy bag
Contain：
1.4wt% to 1.6wt% Cu, for example, 1.4,1.5,1.6wt% Cu, preferably 1.5wt% Cu；Cu is
A kind of alloy strengthening element, be advantageous to obtain higher tensile strength and preferable elongation percentage (table 2) using the Cu of moderate content,
Make sheet alloy that there is good solderability again simultaneously.
1.2wt% to 1.5wt% Mn, for example, 1.2,1.3,1.4 or 1.5wt% Mn.The main function of Mn elements
It is to be formed reinforced alloys matrix while can not influence corrosion proof Al-Mn intermediate compounds again.
0.6wt% to 1.0wt% Mg, for example, 0.6,0.7,0.8,0.9,1.0wt% Mg, preferably 0.8wt%
Mg.The main function of Mg elements is that the Al for being capable of reinforced alloys matrix is formed with Cu elements2CuMg intermediate compounds.Mg contents
It is unsuitable too high, otherwise influence founding and solderability.
0.3wt% to 0.5wt% Fe, for example, 0.3,0.4,0.5wt% Fe, preferably 0.4wt% Fe.Fe members
The main function of element is to form a small amount of AlMnFe compounds with Mn elements to strengthen phase.
0.2wt% to 0.6wt% Sm (be, for example, 0.2,0.4,0.6wt% Sm, preferably 0.2 to 0.4wt%'s
Sm.Sm is a kind of alloy strengthening element, and substantial amounts of Al is formed in alloy of the present invention10Cu7Sm2Strengthen phase, have sheet alloy
There are higher room temperature strength and elongation percentage, higher elevated temperature strength, while the corrosion potential of sheet alloy can significantly be shuffled again
So as to significantly improve corrosion resistance.If Sm too high levels, thick compound phase is easily formed in alloy, strengthens decreased effectiveness
And corrosion resistance declines (table 2).The corrosion potential of the alloy significantly can regulate and control improve according to samarium content, sheet material elevated temperature strength
It is good with cupping processability, suitable for casing of lithium ion battery field.
Surplus is aluminium and inevitable impurity.Typical inevitably impurity is, for example, the other elements such as Si, Cr.Institute
The content for stating inevitable impurity is respectively less than 0.05 weight %.
In some embodiments, the tensile strength of the aluminum bronze manganese magnesium samarium alloy is more than 300MPa, preferably equal to or
More than 330MPa.
In some embodiments, the yield strength of the aluminum bronze manganese magnesium samarium alloy is equal to or more than 280MPa.
In some embodiments, the elongation percentage of the aluminum bronze manganese magnesium samarium alloy is equal to or more than 5%.
In some embodiments, the Erichsen number of the aluminum bronze manganese magnesium samarium alloy is more than 4.5mm, preferably greater than 4.8mm.
In some embodiments, the corrosion potential of the aluminum bronze manganese magnesium samarium alloy is less than -700mV.
In some embodiments, Testing Tensile Strength at Elevated Temperature of the aluminum bronze manganese magnesium samarium alloy in 150-200 DEG C of section is more than
260MPa。
In some embodiments, the aluminum bronze manganese magnesium samarium alloy is used to manufacture casing of lithium ion battery, in particular for
Manufacture dynamic lithium battery shell.
The present invention is hot-rolled down to 3mm thickness sheet material, multi-pass cold rolling using conventional vacuum induction melting block, 500 DEG C
Aluminum bronze manganese magnesium samarium alloy sheet material is prepared for (aging) heat treatment method is stabilized.
In some embodiments, the thickness of the cold rolling sheet alloy is 0.3mm to 0.5mm (such as 0.3mm, 0.4mm
Or 0.5mm), and wherein described aging heat treatment carries out 8-24 hours in 150 DEG C of temperature.Suitable thickness can reach high-strength
Thinning lightweight design effect, and ensure the reliability of housing.Aging heat treatment contributes to Al2CuMg enhancing phase formation and
Partially remove cold rolling stress.
Embodiment
Embodiment 1
Using the corresponding metal Al of element shown in table 1, metal Mg, Al-Cu intermediate alloy, Al-Mn intermediate alloys, Al-Fe
Intermediate alloy, Al-Sm intermediate alloys, the casting that aluminum bronze manganese magnesium samarium alloy plate thickness is 35mm is prepared by melting and casting method
Make alloy blank material.Alloy preform homogenizing annealing 8 hours in 590 DEG C of annealing furnace.Then being rolled into thickness at 500 DEG C is
3mm hot rolled strip, it is cold rolled to the cold rolling alloy strip steel rolled stock that thickness is 0.43mm by 6 passages thereafter.Cold rolling alloy strip steel rolled stock is existed
150 DEG C carry out acquisition aluminum bronze manganese magnesium samarium alloy sheet material after the heat treatment of aging in 24 hours.With electronic tensile test machine beta alloy plate
Room temperature tensile intensity, yield strength and the elongation percentage of material, and 150 DEG C and 200 DEG C of tensile strength.By in 0.6M NaCl
The experiment of Tafel activation polarizations is carried out in solution and obtains alloy corrosion current potential.In addition respective alloy is tested with cupping testing machine
The Erichsen number of sheet material.The enhancing phase of sheet alloy is analyzed using X-ray diffractometer.Experimental result is shown in Table 2.
Embodiment 2 to 4
Except Sm addition is different, other aspects are carried out by the way of same as Example 1.
Embodiment 5 to 7
In addition to Cu contents improve, Sm contents are identical or different and add a small amount of Si, other aspects use and embodiment
1 identical mode is carried out.
Comparative example 1
In addition to not adding Sm, other aspects are carried out by the way of same as Example 1.
Comparative example 2
It is the material used in disclosed patent CN 101358307A embodiment 13.
Comparative example 3
It is the common used material of China YouSe metal industry standard YS/T 914-2013 (dynamic lithium battery aluminum hull) defined
(3003Al, H14 state).
The experimental result of comparison sheet 2 and comparative example data are it can be found that the room-temperature mechanical property of sheet alloy of the present invention is remote
It is much better than traditional lithium battery aluminum hull material (3003Al), room temperature strength is up to more than 5% up to more than 300MPa, elongation percentage,
Room temperature comprehensive mechanical property is substantially better than conventional alloys sheet material described in comparative example 3.Compared with the alloy for being not added with samarium, Alloy At Room Temperature
Intensity is also obviously improved with elongation percentage.Can significantly it be regulated and controled by the samarium content and copper content optimum organization of sheet alloy of the present invention
The corrosion potential of alloy makes it just move to -620mV, and significantly increase sheet alloy cupping forming ability and high-temperature heat-resistance it is strong
Spend (being more than 260MPa).X-ray diffraction analysis result also indicate that containing in samarium alloy except formed common α-Al, AlMnFe phases it
Outside, it yet forms both substantial amounts of Al10Cu7Sm2And Al2CuMg strengthens phase, and these enhancings have relative to the lifting of alloy mechanical property
Significant contribution.Excellent comprehensive performance possessed by sheet alloy of the present invention is very beneficial for high-strength lightweight, height is anti-corrosion, high resistance to
Heat, the development and application of high reliability power lithium-ion battery aluminum hull.
The chemical composition (wt%) of the alloy of table 1
The performance of the embodiment alloy of table 2
Under the teaching of the present invention and above-described embodiment, those skilled in the art are easy to it is envisioned that cited by the present invention
Or each raw material enumerated or its equivalent alterations, each processing method or its equivalent alterations can realize the present invention, and each original
The parameter bound value of material and processing method, interval value can realize the present invention, embodiment numerous to list herein.
Claims (4)
1. a kind of high intensity aluminum bronze manganese magnesium samarium alloy for casing of lithium ion battery, it is characterised in that the alloy includes：
1.4-1.6wt% Cu；1.2-1.4wt% Mn；0.7-0.9wt% Mg；0.3-0.5wt% Fe；0.2-0.6wt%'s
Sm；Surplus is aluminium and inevitable impurity.
2. aluminum bronze manganese magnesium samarium alloy according to claim 1, it is characterised in that the content of the inevitably impurity is small
In 0.05wt%.
3. the aluminum bronze manganese magnesium samarium alloy according to claim 1 to 2, it is characterised in that the alloying component is：
1.5wt% Cu；
1.3wt% Mn；
0.8wt% Mg；
0.4wt% Fe；
0.2-0.4wt% Sm；
Surplus is aluminium and inevitable impurity.
4. the aluminum bronze manganese magnesium samarium alloy according to claim 1-3, it is characterised in that contain Al in the alloy10Cu7Sm2With
Al2CuMg strengthens phase, the room temperature tensile intensity of the sheet material of the alloy formation is more than 300MPa, elongation percentage is more than 5%.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711029840.0A CN107794421A (en) | 2017-10-30 | 2017-10-30 | A kind of high intensity aluminum bronze manganese magnesium samarium alloy for casing of lithium ion battery |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711029840.0A CN107794421A (en) | 2017-10-30 | 2017-10-30 | A kind of high intensity aluminum bronze manganese magnesium samarium alloy for casing of lithium ion battery |
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| CN107794421A true CN107794421A (en) | 2018-03-13 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112134374A (en) * | 2020-09-21 | 2020-12-25 | 赣州嘉通新材料有限公司 | A high temperature resistant anti-oxidant neodymium iron boron magnetic steel structure for on new energy automobile |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2010126804A (en) * | 2008-12-01 | 2010-06-10 | Sumitomo Light Metal Ind Ltd | Aluminum alloy sheet for square container |
| CN105506424A (en) * | 2016-01-11 | 2016-04-20 | 上海华峰新材料研发科技有限公司 | High-copper-content high-corrosion-resistance rare earth aluminum alloy and preparation method and application thereof |
-
2017
- 2017-10-30 CN CN201711029840.0A patent/CN107794421A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2010126804A (en) * | 2008-12-01 | 2010-06-10 | Sumitomo Light Metal Ind Ltd | Aluminum alloy sheet for square container |
| CN105506424A (en) * | 2016-01-11 | 2016-04-20 | 上海华峰新材料研发科技有限公司 | High-copper-content high-corrosion-resistance rare earth aluminum alloy and preparation method and application thereof |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112134374A (en) * | 2020-09-21 | 2020-12-25 | 赣州嘉通新材料有限公司 | A high temperature resistant anti-oxidant neodymium iron boron magnetic steel structure for on new energy automobile |
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| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| CB02 | Change of applicant information |
Address after: 201507 1111 Yue Gong Road, Jinshan District, Shanghai Applicant after: Shanghai Huafeng Aluminum Co., Ltd. Address before: 201507 1111 Yue Gong Road, Jinshan District, Shanghai Applicant before: HUAFON NIKKEI ALUMINIUM CORPORATION |
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| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20180313 |
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| RJ01 | Rejection of invention patent application after publication |