As an indispensable part of the ecology of the new energy vehicle industry, the new energy battery utilization industry plays a vital role in promoting the healthy and sustainable development of the entire industrial chain. The problem of dealing with retired power batteries has become an urgent issue that we must face at present. These discarded batteries, if not properly disposed of, pose a serious threat to our natural environment.
The existing ** technology usually adopts the method of air separation of the crushed lithium battery, from which the heavy material and the light material are separated. The heavy material then undergoes a process of iron removal, primary eddy current separation, and secondary eddy current separation to extract the shell and pole piece, respectively. The light material is subjected to cyclone separation to obtain a mixture of diaphragm and black powder, and then through vibrating sieving technology, the diaphragm and black powder are accurately separated by using different sizes of sieve holes. However, due to the possibility of residual electrolytes on the crushed heavy materials, especially the shells and pole pieces, these electrolytes are prone to volatilize and produce gases during eddy current separation, and these gases hide the risk of eddy current.
The present invention aims to provide an innovative system for crushing lithium battery ** and its method to effectively reduce this ** risk. The system cleverly combines a first-stage winnowing unit, a second-stage winnowing unit, a cyclone separator, a second cyclone separator and a high-efficiency dust removal device. These units are connected to each other by carefully designed pipes, resulting in an efficient and safe process.
In the first process, the crushed lithium battery first enters the first-stage winnowing device, and the pole piece and the shell are effectively separated through precise air flow control. Subsequently, the exhaust gas generated by the first stage of winnowing enters a cyclone separator, where the diaphragm is easily separated. Immediately afterwards, the exhaust gas enters a dust collector, in which the black powder is accurately captured, and the clean treatment of the exhaust gas is realized.
The mixture of the pole piece and the shell continues to enter the two-stage winnowing unit, where the larger shell is precisely separated using different air velocities and directions. The remaining electrode pieces enter the second cyclone separation device under the action of the exhaust gas generated by the secondary winnowing, and the separation work is completed.
Through such a design, the present invention not only realizes the efficient separation of the internal components of the lithium battery, but more importantly, it completely avoids the use of eddy current separation technology, thereby greatly reducing the risk caused by the gas produced by the volatilization of the electrolyte. This innovation not only improves the safety of the first process, but also provides a strong guarantee for the sustainable development of the new energy battery utilization industry.