What is dry crushing method for lithium-ion batteries?

Dry crushing method brings the selective crushing characteristic into full play. Methods of wet and dry crushing are adopted to experiment on spent lithium-ion batteries in this investigation. Particle size distribution is analyzed using the wet and dry screening respectively and fine crushed products are characterized by XRD, SEM and EDX.

What is the importance of crushing a battery?

Policies and ethics Crushing is a substantial process step for the following separation, as it transfers the battery cells or modules to a storable and conveyable bulk material. Crushing also leads to the opening of the battery cells and release of valuable materials.

Do spent lithium-ion batteries have selective crushing properties?

The microscopic morphology and the composition distribution of the <0.25 mm size fractions are analyzed. Spent LIBs have good selective crushing property. Dry crushing method brings the selective crushing characteristic into full play. Methods of wet and dry crushing are adopted to experiment on spent lithium-ion batteries in this investigation.

Why should lithium ion batteries be crushed?

Lithium-ion battery cells and modules need to be crushed with low deformation and compression of the fragments to avoid inclusions, and therefore loss of valuable materials. Due to the hazard potential regarding electrolyte and partly carcinogenic coating materials, the process steps and conveyors have to be surrounded and gastight.

Do battery cells crush?

Investigations on the crushing behaviour of the single components (anode-, cathode- and separator foils as well as housing materials) and entire Li-ion battery cells were done. Measured specific mechanical stress energies for the crushing of complete battery cells are compared to calculated ones.

What happens if a battery is crushed?

In the case of crushing, the tools cause an external or internal short due to electrically conductive materials or contact of the electrodes. Discharging and short circuiting of the battery systems before disassembly and short circuiting of every module before crushing eliminates the stored energy and avoids joule heating.