CN115074645A - Homogenization heat treatment process for aluminum alloy battery case for new energy automobile - Google Patents
Homogenization heat treatment process for aluminum alloy battery case for new energy automobile Download PDFInfo
- Publication number
- CN115074645A CN115074645A CN202210806951.2A CN202210806951A CN115074645A CN 115074645 A CN115074645 A CN 115074645A CN 202210806951 A CN202210806951 A CN 202210806951A CN 115074645 A CN115074645 A CN 115074645A
- Authority
- CN
- China
- Prior art keywords
- aluminum alloy
- alloy battery
- heat treatment
- temperature
- battery case
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- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 229910000838 Al alloy Inorganic materials 0.000 title claims abstract description 43
- 238000010438 heat treatment Methods 0.000 title claims abstract description 28
- 238000000034 method Methods 0.000 title claims abstract description 26
- 238000000265 homogenisation Methods 0.000 title claims description 7
- 238000000137 annealing Methods 0.000 claims abstract description 29
- 238000004519 manufacturing process Methods 0.000 claims abstract description 14
- 238000004321 preservation Methods 0.000 claims description 8
- 238000010926 purge Methods 0.000 claims description 2
- 238000001953 recrystallisation Methods 0.000 claims description 2
- 239000011257 shell material Substances 0.000 abstract description 17
- 229910018131 Al-Mn Inorganic materials 0.000 abstract description 6
- 229910018461 Al—Mn Inorganic materials 0.000 abstract description 6
- 229910045601 alloy Inorganic materials 0.000 abstract description 6
- 239000000956 alloy Substances 0.000 abstract description 6
- 238000005098 hot rolling Methods 0.000 abstract description 5
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 abstract description 4
- 229910052782 aluminium Inorganic materials 0.000 abstract description 4
- 238000005096 rolling process Methods 0.000 description 3
- 238000005266 casting Methods 0.000 description 2
- 238000001816 cooling Methods 0.000 description 2
- 230000007547 defect Effects 0.000 description 2
- 238000007599 discharging Methods 0.000 description 2
- 238000005265 energy consumption Methods 0.000 description 2
- 238000005554 pickling Methods 0.000 description 2
- 238000012545 processing Methods 0.000 description 2
- 238000005406 washing Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- JEIPFZHSYJVQDO-UHFFFAOYSA-N iron(III) oxide Inorganic materials O=[Fe]O[Fe]=O JEIPFZHSYJVQDO-UHFFFAOYSA-N 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000010935 stainless steel Substances 0.000 description 1
- 229910001220 stainless steel Inorganic materials 0.000 description 1
Classifications
-
- 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
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D9/00—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor
- C21D9/52—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor for wires; for strips ; for rods of unlimited length
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Crystallography & Structural Chemistry (AREA)
- Mechanical Engineering (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Sealing Battery Cases Or Jackets (AREA)
Abstract
The invention discloses a homogenizing heat treatment process for an aluminum alloy battery shell for a new energy automobile, wherein the aluminum alloy battery shell adopts a two-stage homogenizing heat treatment method. The Al-Mn alloy cast-rolled blank with lower use cost is subjected to homogenizing annealing when the aluminum coil is 9.0-12.0mm thick, so that the final deep drawing performance identical to that of a hot-rolled blank can be realized, the follow-up continuous die punch forming is ensured not to crack, the earing rate is low, the technical requirements of the aluminum alloy battery shell material for the new energy automobile are met, and compared with the traditional hot rolling method, the aluminum alloy battery shell material for the new energy automobile has the advantages of lower production cost, higher yield, easiness in production and the like.
Description
Technical Field
The invention belongs to the technical field of aluminum plate strip production processes, and particularly relates to an aluminum alloy battery shell homogenizing heat treatment process for a new energy automobile.
Background
The high-strength Al-Mn alloy is widely used for the aluminum alloy battery case, is widely applied to the field of new energy steam electric vehicle power batteries, has excellent corrosion resistance, formability, rust resistance, good weldability and conductivity, has low density compared with the traditional stainless steel, can indirectly reduce the weight of the whole vehicle and improve the endurance mileage of the vehicle, is produced by adopting a hot rolling blank method in the current industry, has the defects of large equipment investment, long production flow, high energy consumption, low yield and the like, is produced by adopting a cast rolling blank method with lower cost, has the advantages of small equipment investment, short production flow, low energy consumption, high yield and the like, and can realize the production of the battery case product with the same deep drawing performance as the hot rolling blank method.
Disclosure of Invention
The invention aims to overcome the defects in the prior art and provides a homogenizing heat treatment process for an aluminum alloy battery shell for a new energy automobile.
In order to solve the technical problems, the invention aims to realize that: the invention relates to a homogenizing heat treatment process of an aluminum alloy battery shell for a new energy automobile, which comprises the following steps of:
(1) putting the cast-rolled blank of the aluminum alloy battery shell into a high-temperature annealing furnace;
(2) heating the high-temperature annealing furnace to enable the temperature of the cast-rolled blank of the aluminum alloy battery case in the high-temperature annealing furnace to reach the first-stage temperature, and continuously preserving heat, wherein the first-stage temperature is at the recrystallization temperature, and the heat preservation time is t 1;
(3) reducing the high-temperature annealing furnace to enable the temperature of the cast-rolled blank of the aluminum alloy battery case in the high-temperature annealing furnace to reach the second-stage temperature, and continuously preserving heat, wherein the second-stage temperature is lower than the normal annealing treatment temperature, and the heat preservation time t 2;
(4) and (4) sending the cast-rolled blank of the aluminum alloy battery case subjected to the homogenization heat treatment to the next production process.
The invention is further configured to: the thickness of the cast-rolled blank of the aluminum alloy battery shell is 9.0-12.0 mm.
The invention is further configured to: the temperature of the first stage is raised to 570-600 ℃ at the speed of 0.8-2.0 ℃/min.
The invention is further configured to: the heat preservation time t1 is 20-26 h.
The invention is further configured to: and in the second stage, a purging fan of the high-temperature annealing furnace is started to 75-85%, and the high temperature is reduced to 540-560 ℃ at the speed of 0.5-3.0 ℃/min.
The invention is further configured to: the heat preservation time t2 is 4-8 h.
The invention is further configured to: the grain size of the cast-rolled blank of the aluminum alloy battery case is less than or equal to 3 grades after the homogenization heat treatment is completed.
In conclusion, the invention has the following beneficial effects: the invention relates to an aluminum alloy battery shell homogenizing heat treatment process for a new energy automobile, wherein a two-stage homogenizing heat treatment method is adopted for the aluminum alloy battery shell. The Al-Mn alloy cast-rolled blank with lower use cost is subjected to homogenizing annealing when the aluminum coil is 9.0-12.0mm thick, so that the final deep drawing performance identical to that of a hot-rolled blank can be realized, the follow-up continuous die punch forming is ensured not to crack, the earing rate is low, the technical requirements of the aluminum alloy battery shell material for the new energy automobile are met, and compared with the traditional hot rolling method, the aluminum alloy battery shell material for the new energy automobile has the advantages of lower production cost, higher yield, easiness in production and the like.
Detailed Description
For a better understanding of the technical solutions of the present invention, the following preferred embodiments of the present invention are described in conjunction with the specific examples, but it should be understood that the descriptions are only for the purpose of further illustrating the features and advantages of the present invention, and are not intended to limit the patent claims of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
The invention will be further described with reference to the following preferred embodiments.
Example 1
1. Putting a blank with the thickness of 9.5mm cast-rolled by the Al-Mn alloy battery case into a high-temperature annealing furnace;
2. heating a high-temperature annealing furnace to enable the first-stage temperature of the cast-rolled blank of the aluminum alloy battery case in the high-temperature annealing furnace to be 580 ℃, and continuously preserving heat for 25 hours;
3. starting a blow washing fan of the high-temperature annealing furnace to 80 percent, and quickly reducing the temperature in the furnace;
4. reducing the high-temperature annealing furnace to ensure that the temperature of the second stage of the cast-rolled blank of the aluminum alloy battery case in the high-temperature annealing furnace is 560 ℃, continuously preserving the heat for 4h, cooling and discharging;
5. and (3) casting and rolling the aluminum alloy battery case blank after the homogenization heat treatment is finished, pickling the blank until the grain size is less than or equal to 3 grade, and turning to the next processing procedure for production.
Example 2
1. Putting a blank with the thickness of 9.5mm cast-rolled by the Al-Mn alloy battery case into a high-temperature annealing furnace;
2. heating a high-temperature annealing furnace to enable the first-stage temperature of the cast-rolled blank of the aluminum alloy battery case in the high-temperature annealing furnace to be 580 ℃, and continuously preserving heat for 20 hours;
3. starting a blow washing fan of the high-temperature annealing furnace to 80 percent, and quickly reducing the temperature in the furnace;
4. reducing the high-temperature annealing furnace to ensure that the temperature of the second stage of the cast-rolled blank of the aluminum alloy battery case in the high-temperature annealing furnace is 540 ℃, continuously preserving the heat for 6h, cooling and discharging;
5. and (3) casting and rolling the aluminum alloy battery case blank after the homogenization heat treatment is finished, pickling the blank until the grain size is less than or equal to 3 grade, and turning to the next processing procedure for production.
The invention relates to an aluminum alloy battery shell homogenizing heat treatment process for a new energy automobile, wherein a two-stage homogenizing heat treatment method is adopted for the aluminum alloy battery shell. The Al-Mn alloy cast-rolled blank with lower use cost is subjected to homogenizing annealing when the aluminum coil is 9.0-12.0mm thick, so that the final deep drawing performance identical to that of a hot-rolled blank can be realized, the follow-up continuous die punch forming is ensured not to crack, the earing rate is small, the technical requirements of the aluminum alloy battery shell material for the new energy automobile are met, and compared with the traditional hot rolling method, the aluminum alloy battery shell material for the new energy automobile has the advantages of lower production cost, higher yield, easiness in production and the like.
Unless otherwise specified, in the present invention, if there is an orientation or positional relationship indicated by terms of "length", "width", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., based on the orientation or positional relationship actually shown, it is only for convenience of describing the present invention and simplifying the description, rather than to indicate or imply that the device or element so referred to must have a particular orientation, be constructed and operated in a particular orientation, therefore, the terms describing orientation or positional relationship in the present invention are for illustrative purposes only, and should not be construed as limiting the present patent, it is possible for those skilled in the art to combine the embodiments and understand the specific meanings of the above terms according to specific situations.
Unless expressly stated or limited otherwise, the terms "disposed," "connected," and "connected" are used broadly and encompass, for example, being fixedly connected, detachably connected, or integrally connected; the connection may be direct or indirect via an intermediate medium, and may be a communication between the two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.
The foregoing detailed description of the preferred embodiments of the invention has been presented. It should be understood that numerous modifications and variations can be devised by those skilled in the art in light of the above teachings. Therefore, the technical solutions available to those skilled in the art through logic analysis, reasoning and limited experiments based on the prior art according to the concept of the present invention should be within the scope of protection defined by the claims.
Claims (7)
1. The homogenizing heat treatment process of the aluminum alloy battery shell for the new energy automobile is characterized by comprising the following steps of:
(1) putting the cast-rolled blank of the aluminum alloy battery shell into a high-temperature annealing furnace;
(2) heating the high-temperature annealing furnace to enable the temperature of the cast-rolled blank of the aluminum alloy battery case in the high-temperature annealing furnace to reach the first-stage temperature, and continuously preserving heat, wherein the first-stage temperature is at the recrystallization temperature, and the heat preservation time is t 1;
(3) reducing the high-temperature annealing furnace to enable the temperature of the cast-rolled blank of the aluminum alloy battery case in the high-temperature annealing furnace to reach the second-stage temperature, and continuously preserving heat, wherein the second-stage temperature is lower than the normal annealing treatment temperature, and the heat preservation time t 2;
(4) and (4) sending the cast-rolled blank of the aluminum alloy battery shell subjected to the homogenization heat treatment to the next production process.
2. The homogenizing heat treatment process for the aluminum alloy battery case for the new energy automobile according to claim 1, characterized in that the thickness of the cast-rolled blank of the aluminum alloy battery case in the step (1) is 9.0-12.0 mm.
3. The homogenizing heat treatment process for the aluminum alloy battery case for the new energy automobile as claimed in claim 1, wherein the first-stage temperature in the step (2) is raised to 570-600 ℃ at a rate of 0.8-2.0 ℃/min.
4. The homogenizing heat treatment process for the aluminum alloy battery case for the new energy automobile according to claim 1, characterized in that the heat preservation time t1 in the step (2) is 20-26 h.
5. The homogenizing heat treatment process for the aluminum alloy battery case for the new energy automobile as claimed in claim 1, wherein in the second stage in the step (3), a purging fan of the high temperature annealing furnace is started to 75-85%, and the high temperature is reduced to 540-560 ℃ at a rate of 0.5-3.0 ℃/min.
6. The homogenizing heat treatment process for the aluminum alloy battery case for the new energy automobile according to claim 1, characterized in that the heat preservation time t2 in the step (3) is 4-8 h.
7. The homogenizing heat treatment process for the aluminum alloy battery case for the new energy automobile according to claim 1, characterized in that the grain size is less than or equal to 3 grade after the homogenizing heat treatment of the cast-rolled blank of the aluminum alloy battery case is completed.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210806951.2A CN115074645A (en) | 2022-07-09 | 2022-07-09 | Homogenization heat treatment process for aluminum alloy battery case for new energy automobile |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210806951.2A CN115074645A (en) | 2022-07-09 | 2022-07-09 | Homogenization heat treatment process for aluminum alloy battery case for new energy automobile |
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| Publication Number | Publication Date |
|---|---|
| CN115074645A true CN115074645A (en) | 2022-09-20 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202210806951.2A Pending CN115074645A (en) | 2022-07-09 | 2022-07-09 | Homogenization heat treatment process for aluminum alloy battery case for new energy automobile |
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| CN (1) | CN115074645A (en) |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101016607A (en) * | 2006-09-06 | 2007-08-15 | 中铝西南铝板带有限公司 | Homogenization heat treatment method of aluminum alloy ingot casting for pop-top can body |
| CA2907160A1 (en) * | 2013-04-19 | 2014-10-23 | General Research Institute For Nonferrous Metals | Aluminum alloy material suitable for the manufacture of automotive body panels and methods for producing the same |
| WO2015109893A1 (en) * | 2014-01-22 | 2015-07-30 | 北京科技大学 | Al-mg-si-cu-zn series alloy of fast ageing response type and preparation method therefor |
| CN107419140A (en) * | 2017-07-25 | 2017-12-01 | 江苏常铝铝业股份有限公司 | The manufacture method of the high extension aluminium alloy strips of battery container |
| CN111057912A (en) * | 2020-01-19 | 2020-04-24 | 天津忠旺铝业有限公司 | Process for reducing recrystallization temperature of 3003 aluminum alloy |
| CN111074110A (en) * | 2020-01-10 | 2020-04-28 | 广西百矿润泰铝业有限公司 | Production method of aluminum and aluminum alloy plate strip for new energy power battery case |
| CN112195373A (en) * | 2020-11-09 | 2021-01-08 | 江苏常铝铝业集团股份有限公司 | Aluminum alloy strip for battery shell and manufacturing method thereof |
-
2022
- 2022-07-09 CN CN202210806951.2A patent/CN115074645A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101016607A (en) * | 2006-09-06 | 2007-08-15 | 中铝西南铝板带有限公司 | Homogenization heat treatment method of aluminum alloy ingot casting for pop-top can body |
| CA2907160A1 (en) * | 2013-04-19 | 2014-10-23 | General Research Institute For Nonferrous Metals | Aluminum alloy material suitable for the manufacture of automotive body panels and methods for producing the same |
| WO2015109893A1 (en) * | 2014-01-22 | 2015-07-30 | 北京科技大学 | Al-mg-si-cu-zn series alloy of fast ageing response type and preparation method therefor |
| CN107419140A (en) * | 2017-07-25 | 2017-12-01 | 江苏常铝铝业股份有限公司 | The manufacture method of the high extension aluminium alloy strips of battery container |
| CN111074110A (en) * | 2020-01-10 | 2020-04-28 | 广西百矿润泰铝业有限公司 | Production method of aluminum and aluminum alloy plate strip for new energy power battery case |
| CN111057912A (en) * | 2020-01-19 | 2020-04-24 | 天津忠旺铝业有限公司 | Process for reducing recrystallization temperature of 3003 aluminum alloy |
| CN112195373A (en) * | 2020-11-09 | 2021-01-08 | 江苏常铝铝业集团股份有限公司 | Aluminum alloy strip for battery shell and manufacturing method thereof |
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Application publication date: 20220920 |
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| RJ01 | Rejection of invention patent application after publication |