Cell-grade lithium metal casting device and method

Abstract

The invention provides cell-grade lithium metal casting device and method, relates to lithium metal casting device and method, and in particular relates to a cell-grade lithium metal casting device of a full-closed type metal structure and a cell-grade lithium metal casting method. The device comprises a pure lithium cylinder, a disc casting machine, an argon circulating device, an argon device, a vacuum pump, a refrigerator unit and a control cabinet; the disk casting machine comprises a casting machine cylinder body, a bottom disk, a rotating disk, a die, a gearbox and a stepping motor; a casting machine vacuum pipe and a casting machine argon pipe are respectively connected with the outer vacuum pump and the argon device; a circulating argon inlet pipe is connected with the outer argon circulating device; a second liquid sealing valve is mounted between the pure lithium cylinder and the disk casting machine; a communication pipe is mounted between the pure lithium cylinder and the disk casting machine; the argon circulating device comprises a heat exchanger and a circulating fan which are connected in a sequence. The cell-grade lithium metal casting device is simple and compact in structure, simple and convenient to operate, safe and reliable to produce and run, and achieves whole-process automatic controlled production.

Description

technical field [0001] The invention discloses battery-grade metal lithium casting equipment and a casting method, relating to metal lithium casting equipment and a casting method, in particular to battery-grade metal lithium casting equipment and a casting method with a fully enclosed metal structure. Background technique [0002] With the continuous development of the application field of primary lithium batteries, higher requirements are placed on the quality of battery-grade metal lithium as the negative electrode material. [0003] In the industrial practice of battery-grade lithium metal, the casting, cooling, demoulding and packaging of lithium metal are usually carried out in a glass glove box filled with argon. There are four main problems in the glove box casting equipment of this glass structure: the first is that the sealing safety performance of the glass glove box is relatively poor. After the equipment has been vibrating for a long time, it is easy to leak, c...

AI Technical Summary

Problems solved by technology

There are four main problems in this kind of glove box casting equipment with glass structure: first, the sealing safety performance of the glass glove box is poor

After the equipment is vibrated for a long time, it is easy to leak, causing the outside natural air to enter the box, causing argon pollution. At the same time, this kind of leakage is not easy to find

Second, when repairing equipment in the glove box or replacing damaged gloves, the outside air will enter the glove box, and the argon gas purification device needs to run for a long time to purify the argon gas to a qualified level, which affects the normal production

The third is that the glove box with this structure has a large space. After the metal lithium is cast, the cooling time of the argon circulation is long, and the production capacity is low.

Fourth, the casting valve in the glove box is manually operated for manual casting, which has certain potential safety hazards

[0004] Because the glass-structured glove box is prone to leakage and the high-purity argon in the box is polluted, the quality stability of battery-grade metal lithium produced by this equipment process is poor, especially the content of oxygen and nitrogen in metal lithium is unstable, so Affects the stability of the electrical performance and quality of primary lithium batteries

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