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The lithium ingot is the primary component used in battery cell manufacturing process. Lithium is an elemental metal with the highest specific heat of any solid element, which makes it perfect for high temperature applications. It’s also very light, with a density of just over half a gram per cubic centimetre.
The main sources of today’s lithium are from liquid brine reservoirs under salt flats, known as salars, located in southwestern South America and China. Other sources include geothermal and oil field brines.
Lithium is an important material for battery cells due to its high electrode potential and low weight. It’s also an important material for medical and pharmaceutical applications.
However, there are problems associated with extracting lithium from salts and other minerals. It can cause soil pollution, and it can be harmful to animals and the environment when mined in its raw form.
As a result, there is a need for an improved extraction method that does not pollute the environment and does not harm people.
One such improvement is a semi-continuous extrusion of lithium or lithium alloy ingots into a thin sheet.
In a preferred embodiment, the extrusion of lithium or lithium alloy ingots is carried out using an assembly including a die holder and an extrusion die having an adjustable die aperture. The adjustable die aperture may be adjusted by an operator during the extrusion process to control a curvature of the ingots.
The ingot is inserted into the open rear door 14 of the extrusion die and closed behind by closing the rear door 16. A vacuum pump connected to the vacuum conduit 30 is activated to create a partial vacuum inside inner chamber 18 in front and behind piston head 26.