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Double-sided dark battery foil and preparation method thereof

A battery and double-sided technology, which is applied to battery pack components, battery boxes/covers, battery box/cover materials, etc., can solve the problems of poor plate shape, low tensile strength, low production efficiency, etc., and achieve the performance of finished products and high surface quality, performance-enhancing effects

Active Publication Date: 2020-12-04
GUANGXI BAISE XINGHE ALUMINUM
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to provide a double-sided dark battery foil and its preparation method to solve the actual technical problems of low tensile strength, poor plate shape and low production efficiency in the aluminum foil for batteries produced by the existing production process

Method used

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  • Double-sided dark battery foil and preparation method thereof

Examples

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preparation example Construction

[0031] The preparation method of the double-sided dark battery foil comprises the following steps:

[0032] (1) Add the raw materials of the double-sided dark battery foil into the melting furnace for melting, and the melting preparation conditions are as follows: the melting temperature is 730-760°C to obtain the aluminum alloy melt;

[0033] (2) Input the molten aluminum alloy into the casting and rolling machine, cast and roll it into a billet with a thickness of 7.0-7.5mm, and cool it to room temperature;

[0034] (3) When the cast-rolled billet is cold-rolled by a cold rolling mill to a thickness of 1.8-4.0mm, homogenization annealing treatment is performed: the annealing temperature is 550°C, and the holding time is 25h;

[0035] (4) After the homogenized annealed aluminum coil is cooled to room temperature, it is cold rolled to 0.9-1.9mm in separate passes;

[0036] (5) After the aluminum coils in step (4) are cold-rolled in separate passes, they are recoiled and trimm...

Embodiment 1

[0042]A double-sided dark battery foil, comprising the following raw materials in mass percentage: Si: 0.105%, Fe: 0.416%, Cu: 0.0333%, Mn: 0.0213%, Mg: 0.005%, Ti: 0.0206%, Al: 99.36% .

[0043] The preparation method of the double-sided dark battery foil comprises the following steps:

[0044] (1) Add the raw materials of the double-sided dark battery foil into the melting furnace for melting. The melting preparation conditions are as follows: the melting temperature is 750°C to obtain the aluminum alloy melt;

[0045] (2) Input the molten aluminum alloy into the casting and rolling machine, cast and roll it into a billet with a thickness of 7.0mm, and cool it to room temperature;

[0046] (3) The cast-rolled billet is cold-rolled by cold-rolling mill to thicknesses of 3.3mm and 1.8mm, and homogenized annealing treatment is carried out: the annealing temperature is 550°C, and the holding time is 25h;

[0047] (4) After the homogenized annealed aluminum coil is cooled to ro...

Embodiment 2

[0053] A double-sided dark battery foil, comprising the following raw materials in mass percentage: Si: 0.127%, Fe: 0.419%, Cu: 0.0343%, Mn: 0.0214%, Mg: 0.005%, Ti: 0.0267%, Al: 99.33% .

[0054] The preparation method of the double-sided dark battery foil comprises the following steps:

[0055] (1) Add the raw materials of the double-sided dark battery foil into the melting furnace for melting. The melting preparation conditions are as follows: the melting temperature is 750°C to obtain the aluminum alloy melt;

[0056] (2) Input the molten aluminum alloy into the casting and rolling machine, cast and roll it into a billet with a thickness of 7.5mm, and cool it to room temperature;

[0057] (3) The cast-rolled billet is cold-rolled to a thickness of 4.0 mm through the cold-rolling mill and then subjected to homogenization annealing treatment: the annealing temperature is 550°C, and the holding time is 25 hours;

[0058] (4) After the homogenized annealed aluminum coil is c...

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Abstract

The invention discloses a double-sided dark battery foil and a preparation method thereof. The double-sided dark battery foil comprises the following component raw materials: Si, Fe, Cu, Mn, Mg, Ti, Al; the double-sided dark battery foil The preparation method comprises the following steps: (1) adding raw materials into a smelting furnace for smelting to obtain a molten liquid; (2) inputting the molten liquid into a casting-rolling machine, and casting and rolling a billet; (3) cooling the cast-rolling billet Cold rolling in the rolling mill, performing homogenization annealing treatment; (4) After the aluminum coil after homogenization annealing is cooled to room temperature, cold rolling in separate passes; (5) Recoil trimming; (6) Intermediate annealing treatment; ( 7) Cold-rolling the intermediate annealed aluminum coil; (8) Recoiling the cold-rolled aluminum coil, followed by foil rolling, to obtain a double-sided dark battery foil. The aluminum powder on the dark side of the double-sided dark battery foil produced by the invention is effectively controlled, has no ruffles, has high usability and surface quality of the finished product, and is applicable to most batteries.

Description

technical field [0001] The invention belongs to the technical field of battery foil preparation, and in particular relates to a double-sided dark battery foil and a preparation method thereof. Background technique [0002] In recent years, my country's new energy vehicle industry has developed rapidly, and lithium batteries are the key to the development of new energy vehicles. With the development of battery technology, especially in the field of new energy vehicles, higher requirements are put forward for lithium batteries, and the battery industry also puts forward new requirements for aluminum foil for batteries. This aluminum foil requires high dimensional accuracy, clean, uniform surface, no scratches and other defects, balanced plate shape, extremely thin thickness, and high tensile strength and elongation. With the gradual thinning of aluminum foil for lithium batteries, the requirements for tensile strength, elongation and surface quality also increase. While the ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22C21/00C22F1/04B21B1/40H01M2/02H01M50/116
CPCC22C21/00C22F1/04B21B1/40H01M50/116Y02E60/10
Inventor 吴维泽吴功翔龚良贤蒙义都杨上军吴小莉
Owner GUANGXI BAISE XINGHE ALUMINUM
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