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Hot-pressing air-cooling forming process for anode aluminum plate for aluminum air cell

A technology of aluminum-air battery and forming process, which is applied in the field of hot-pressing and air-cooling forming process of anode aluminum plate for aluminum-air battery, can solve the problem of reducing discharge current density, voltage and power density, increasing internal resistance of battery, and inability of battery to output stably for a long time. and other problems, to achieve the effect of improving power density and stability and eliminating the passivation layer

Inactive Publication Date: 2016-06-01
ZHEJIANG GEELY HLDG GRP CO LTD +1
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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 solve the problem that part of the discharge product on the anode plate of the existing aluminum-air battery adheres to the surface of the aluminum plate to form a passivation layer, reduces the mass transfer rate between the aluminum plate and the electrolyte, increases the internal resistance of the battery, and causes discharge current density, voltage and The power density continues to decrease, and the battery cannot output stably for a long time. Provide a hot-pressed air-cooled forming process for the anode aluminum plate for aluminum-air batteries that eliminates the passivation layer of the aluminum plate during the discharge process and realizes the long-term high power density and stable output of the battery.

Method used

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  • Hot-pressing air-cooling forming process for anode aluminum plate for aluminum air cell
  • Hot-pressing air-cooling forming process for anode aluminum plate for aluminum air cell
  • Hot-pressing air-cooling forming process for anode aluminum plate for aluminum air cell

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Effect test

Embodiment 1

[0024] A hot-pressing and air-cooling forming process of an anode aluminum plate for an aluminum-air battery, comprising the following steps:

[0025] a) Melting: Under the protection of inert gas, the alloy aluminum ingot is smelted at a temperature of 735°C to obtain a liquid alloy liquid; the alloy aluminum ingot is an aluminum-magnesium binary alloy, and the percentage of magnesium is 0.5%;

[0026] b) Rod casting: casting the alloy liquid obtained in step a) into an aluminum rod, and rapidly cooling after holding at 570°C for 6 hours;

[0027] c) Extrusion: heat the aluminum rod obtained in step b) to 455°C, and extrude it into an aluminum profile 5 times;

[0028] d) Post-processing: Extrude the aluminum profile obtained in step c) from the extruder and then air-cool it at a rate of 115°C / min to obtain an anode aluminum plate for an aluminum-air battery. The hardness of the aluminum profile is 8 Webster hardness, and the aluminum The thickness of the profile is 2mm.

Embodiment 2

[0030] A hot-pressing and air-cooling forming process of an anode aluminum plate for an aluminum-air battery, comprising the following steps:

[0031] a) Melting: Under the protection of inert gas, the alloy aluminum ingot is smelted at a temperature of 740°C to obtain a liquid alloy liquid; the alloy aluminum ingot is an aluminum-magnesium binary alloy, and the percentage of magnesium is 1%;

[0032] b) Rod casting: casting the alloy liquid obtained in step a) into an aluminum rod, and rapidly cooling after holding at 520°C for 5 hours;

[0033] c) Extrusion: heat the aluminum rod obtained in step b) to 400°C, and extrude it into an aluminum profile for 3 times;

[0034] d) Post-processing: Extrude the aluminum profile obtained in step c) from the extruder and then air-cool it at a rate of 120°C / min to obtain an anode aluminum plate for aluminum-air batteries. The hardness of the aluminum profile is 10 Webster hardness, and the aluminum The thickness of the profile is 0.5mm....

Embodiment 3

[0036] A hot-pressing and air-cooling forming process of an anode aluminum plate for an aluminum-air battery, comprising the following steps:

[0037] a) Melting: Under the protection of inert gas, the alloy aluminum ingot is smelted at a temperature of 750°C to obtain a liquid alloy liquid; the alloy aluminum ingot is an aluminum-magnesium binary alloy, and the percentage of magnesium is 1.5%;

[0038] b) Rod casting: casting the alloy liquid obtained in step a) into an aluminum rod, and rapidly cooling after holding at 610°C for 8 hours;

[0039] c) Extrusion: heat the aluminum rod obtained in step b) to 470°C, and extrude it into an aluminum profile 8 times;

[0040] d) Post-processing: Extrude the aluminum profile obtained in step c) from the extruder and then air-cool it at a rate of 125°C / min to obtain an anode aluminum plate for aluminum-air batteries. The hardness of the aluminum profile is 12 Webster hardness, aluminum The thickness of the profile is 0.5mm.

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Abstract

The invention relates to a hot-pressing air-cooling forming process for an anode aluminum plate for an aluminum air cell. The hot-pressing air-cooling forming process includes the steps of obtaining liquid alloy through smelting, bar casting, extrusion and hot-pressing air-cooling forming. The hot-pressing air-cooling forming is adopted for the anode aluminum plate, so that a passivation layer is eliminated, and long-time stable output of the discharge current density, voltage and power density of the aluminum air cell is achieved. Compared with an aluminum plate formed by pouring of same alloy, the aluminum air cell adopting the aluminum plate processed through the process is remarkably improved in the aspects of the maximum discharge current density, the discharge voltage, the power density and stability.

Description

technical field [0001] The invention relates to the field of air batteries, in particular to a hot-pressing and air-cooling forming process of an anode aluminum plate for an aluminum-air battery, which eliminates the passivation layer of the aluminum plate during the discharge process and realizes stable output of high power density for a long time. Background technique [0002] Aluminum-air batteries have high energy density and have the potential to be used as power sources for electric vehicles. At present, the anode aluminum plates for aluminum-air batteries are usually cast and formed, and the surface is rough. After a part of the discharge product Al2O3 is supersaturated, it cannot be separated from the aluminum plate in time and adheres to the surface of the aluminum plate to form a passivation layer. The passivation layer is insulating and dense. The isolation of the electrolyte reduces the mass transfer rate between the aluminum plate and the electrolyte and increas...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B21C23/06B21C29/00
CPCB21C23/06B21C29/003
Inventor 李雄建周晓兵戴先逢杨建国许俊
Owner ZHEJIANG GEELY HLDG GRP CO LTD
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