New energy power battery shell, aluminum alloy and manufacturing method thereof

Abstract

The invention provides a new energy power battery shell, an aluminum alloy and a manufacturing method thereof. The aluminum alloy is prepared from the following components in percentage by weight: 0.17 to 0.30 percent of Si, 0.50 to 0.60 percent of Fe, 0.02 to 0.08 percent of Cu, 0.90 to 1.05 percent of Mn, 0.02 to 0.06 percent of Mg, less than or equal to 0.05 percent, 0.015 to 0.04 percent of Ti, and the balance of Al and the unavoidable impurities with the single element of less than or equal to 0.05 percent and the total amount of less than 0.15 percent. The aluminum alloy provided by theinvention has good plastic deformation capacity, and can meet the requirement on deep drawability and the requirement on surface quality of the battery shell.

Description

technical field

[0001] The invention belongs to the field of aluminum alloys, and in particular relates to an aluminum alloy for a new energy power battery case, a method for manufacturing the aluminum alloy, and a new energy power battery case including the aluminum alloy. Background technique

[0002] New energy power batteries are known as the heart of new energy vehicles, and their battery cases are usually made of aluminum alloy. During the molding process, the battery case has a large amount of deformation, and the surface should not be scratched when it comes into contact with the mold. However, the existing aluminum alloys for new energy power battery casings have large grains, insufficient deep drawing performance, and the surface of the casing after molding is prone to roughness and poor appearance quality, which will increase the frequency of mold replacement during the stamping process and reduce production efficiency. Contents of the invention

[0003] Aimin...

Examples

Embodiment 1

[0047] In this embodiment, an aluminum alloy for a new energy power battery case is manufactured, and its composition and weight percentage are: Si: 0.30%, Fe: 0.55%, Cu: 0.05%, Mn: 1.05%, Mg: 0.05%, Zn: 0.03%, Ti: 0.04%, the balance is Al and unavoidable impurities less than 0.05% for a single element and less than 0.15% for the total amount.

[0048] use figure 1 The method shown is manufactured as follows:

[0049] (1) Casting: Add the raw materials into the melting furnace according to the weight percentage of each component, the melting temperature is 760°C, electromagnetic stirring is performed 3 times, each time for 10 minutes, the refining temperature is 750°C, the refining time is 20 minutes, and the casting temperature is 705°C ℃.

[0050](2) Sawing: Cut an ingot with a thickness of 550mm, a width of 1400mm, and a length of 7200mm. The head is sawed to 200mm, and the tail is sawed to 100mm. After sawing, the length of the ingot is 6900mm, the thickness is 550mm, an...

Embodiment 2

[0059] In this example, an aluminum alloy for a new energy power battery shell is manufactured, and its composition and weight percentage are: Si: 0.17%, Fe: 0.60%, Cu: 0.08%, Mn: 0.90%, Mg: 0.02%, Zn: 0.01%, Ti: 0.02%, the balance is Al and unavoidable impurities less than 0.05% for a single element and less than 0.15% for the total amount.

[0060] use figure 1 The method shown is manufactured as follows:

[0061] (1) Casting: Add the raw materials into the melting furnace according to the weight percentage of each component, the melting temperature is 740°C, electromagnetic stirring is performed twice, each time for 12 minutes, the refining temperature is 730°C, the refining time is 15 minutes, and the casting temperature is 695 ℃.

[0062] (2) Sawing: Cut an ingot with a thickness of 550mm, a width of 1400mm, and a length of 7200mm. The head is sawed to 200mm, and the tail is sawed to 100mm. After sawing, the length of the ingot is 6900mm, the thickness is 550mm, and the...

Embodiment 3

[0071] In this embodiment, an aluminum alloy for a new energy power battery shell is manufactured, and its composition and weight percentage are: Si: 0.20%, Fe: 0.50%, Cu: 0.02%, Mn: 0.92%, Mg: 0.03%, Zn: 0.04%, Ti: 0.03%, the balance is Al and unavoidable impurities less than 0.05% for a single element and less than 0.15% for the total amount.

[0072] use figure 1 The method shown is manufactured as follows:

[0073] (1) Casting: Add the raw materials into the melting furnace according to the weight percentage of each component, the melting temperature is 750°C, electromagnetic stirring is performed 3 times, each time for 8 minutes, the refining temperature is 740°C, the refining time is 15 minutes, and the casting temperature is 700°C ℃.

[0074] (2) Sawing: Cut an ingot with a thickness of 550mm, a width of 1400mm, and a length of 7200mm. The head is sawed to 200mm, and the tail is sawed to 100mm. After sawing, the length of the ingot is 6900mm, the thickness is 550mm, a...

technical field

[0001] The invention belongs to the field of aluminum alloys, and in particular relates to an aluminum alloy for a new energy power battery case, a method for manufacturing the aluminum alloy, and a new energy power battery case including the aluminum alloy. Background technique

[0002] New energy power batteries are known as the heart of new energy vehicles, and their battery cases are usually made of aluminum alloy. During the molding process, the battery case has a large amount of deformation, and the surface should not be scratched when it comes into contact with the mold. However, the existing aluminum alloys for new energy power battery casings have large grains, insufficient deep drawing performance, and the surface of the casing after molding is prone to roughness and poor appearance quality, which will increase the frequency of mold replacement during the stamping process and reduce production efficiency. Contents of the invention

[0003] Aimin...

Examples

Embodiment 1

[0047] In this embodiment, an aluminum alloy for a new energy power battery case is manufactured, and its composition and weight percentage are: Si: 0.30%, Fe: 0.55%, Cu: 0.05%, Mn: 1.05%, Mg: 0.05%, Zn: 0.03%, Ti: 0.04%, the balance is Al and unavoidable impurities less than 0.05% for a single element and less than 0.15% for the total amount.

[0048] use figure 1 The method shown is manufactured as follows:

[0049] (1) Casting: Add the raw materials into the melting furnace according to the weight percentage of each component, the melting temperature is 760°C, electromagnetic stirring is performed 3 times, each time for 10 minutes, the refining temperature is 750°C, the refining time is 20 minutes, and the casting temperature is 705°C ℃.

[0050](2) Sawing: Cut an ingot with a thickness of 550mm, a width of 1400mm, and a length of 7200mm. The head is sawed to 200mm, and the tail is sawed to 100mm. After sawing, the length of the ingot is 6900mm, the thickness is 550mm, an...

Embodiment 2

[0059] In this example, an aluminum alloy for a new energy power battery shell is manufactured, and its composition and weight percentage are: Si: 0.17%, Fe: 0.60%, Cu: 0.08%, Mn: 0.90%, Mg: 0.02%, Zn: 0.01%, Ti: 0.02%, the balance is Al and unavoidable impurities less than 0.05% for a single element and less than 0.15% for the total amount.

[0060] use figure 1 The method shown is manufactured as follows:

[0061] (1) Casting: Add the raw materials into the melting furnace according to the weight percentage of each component, the melting temperature is 740°C, electromagnetic stirring is performed twice, each time for 12 minutes, the refining temperature is 730°C, the refining time is 15 minutes, and the casting temperature is 695 ℃.

[0062] (2) Sawing: Cut an ingot with a thickness of 550mm, a width of 1400mm, and a length of 7200mm. The head is sawed to 200mm, and the tail is sawed to 100mm. After sawing, the length of the ingot is 6900mm, the thickness is 550mm, and the...

Embodiment 3

[0071] In this embodiment, an aluminum alloy for a new energy power battery shell is manufactured, and its composition and weight percentage are: Si: 0.20%, Fe: 0.50%, Cu: 0.02%, Mn: 0.92%, Mg: 0.03%, Zn: 0.04%, Ti: 0.03%, the balance is Al and unavoidable impurities less than 0.05% for a single element and less than 0.15% for the total amount.

[0072] use figure 1 The method shown is manufactured as follows:

[0073] (1) Casting: Add the raw materials into the melting furnace according to the weight percentage of each component, the melting temperature is 750°C, electromagnetic stirring is performed 3 times, each time for 8 minutes, the refining temperature is 740°C, the refining time is 15 minutes, and the casting temperature is 700°C ℃.

[0074] (2) Sawing: Cut an ingot with a thickness of 550mm, a width of 1400mm, and a length of 7200mm. The head is sawed to 200mm, and the tail is sawed to 100mm. After sawing, the length of the ingot is 6900mm, the thickness is 550mm, a...

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