Study On Technology And Test Of Lithium Ion Battery Disassembly

At present,the study hotspots of lithium ion battery recycling technology mainly inclined to the pre-treatment method of disassembly.In the traditional"mixed then divided"lithium ion battery recycling technology,the pre-treatment method of overall crushing or smelting not only increases the cost of separating the subsequent material,but also reduces the recovery of precious metal elements such as Co and Li.In order to solve the problems above,the disassembly technology and equipment of lithium ion battery are studied in this paper.The specific results are as follows:?1?The size range of square lithium ion battery and the track of precious metal elements are determined.It is proved that the complete inverse PACK technology is not feasible by theoretical analysis and manual disassembly.Based on studies above,a suitable disassembly technology route is re-planned,and the optimum way for the three processes of discharge,cutting and coring is determined.?2?The selection of the cutting method and the design of the tool and fixture structure,which are mainly involved in the central cutting device,are completed,and the whole machine and part of the structure and workflow of the finished automatic disassembly equipment are analyzed.?3?A simple cutting test device was designed,and the structure,natural frequency and vibration mode of the test device model were analyzed by ANSYS Workbench.It is proved that the structural strength of the test device meets the design requirements and does not resonate and the main factor that affects the incision is the deformation of the platform and the tool in the Y-axis direction.Based on studies above,combined with the analysis of the factors that may magnify the deformation,the improved design of the test device and the parameter optimization of the key structure reduce the maximum deformation U_G-1 at the reference point G-1 by 52.32%,which proves the feasibility of parameter optimization,and according to the optimal parameter combination after rounding,the cutting test device is finished.?4?The cutting effect of the cutting device is verified to meet the design requirements and the value of the cutting force is obtained by using the hydraulic test bench and the cutting test device.?5?An equivalent substitution theory of the cutting model was put forward and the feasibility study was carried out through the theory,simulation and test"three-in-one"mode.Finally,the inverse derivation is carried out by imitating orthogonal experimental design,and under the condition that the other settings are constant and the Time Period value is 0.0015s,the basic parameters of the Johnson-Cook constitutive model of a homogeneous material consistent with the size of the sample battery and meeting the equivalent substitution requirement are obtained.At the same time,it is proved that the equivalent substitution theory of cutting model is feasible.