Field Study and Multimethod Analysis of an EV Battery System Disassembly

Abstract

In the coming decades, the number of end-of-life (EoL) traction battery systems will increase sharply. The disassembly of the system to the battery module is necessary to recycle the battery modules or to be able to use them for further second-life applications. These different recovery paths are important pathways to archive a circular battery supply chain. So far, little knowledge about the disassembling of EoL batteries exists. Based on a disassembly experiment of a plug-in hybrid battery system, we present results regarding the battery set-up, including their fasteners, the necessary disassembly steps, and the sequence. Upon the experimental data, we assess the disassembly duration of the battery system under uncertainty with a fuzzy logic approach. The results indicate that a disassembling time of about 22 min is expected for the battery system in the field study if one worker conducts the process. An estimation for disassembling costs per battery system is performed for a plant in Germany. Depending on the plant capacity, the disassembling to battery module level is associated with costs between EUR 80 and 100 per battery system.

Multi-Method Model for the Investigation of Disassembly Scenarios for Electric Vehicle Batteries

“…Due to the reduction in tool changes and the associated reduction in the number of routes as well as the minimization of routes with high distances, the disassembly time is reduced by 22.1% in Scenario 2 compared to Scenario 1: from 2224.4 s to 1732.2 s in the reference scenario. The disassembly times for both scenarios are in the same range as those reported in the literature for comparable battery systems [20,35]. They also correspond to the values we received from battery recyclers in Germany.…”

“…Such batteries are used by OEMs (original equipment manufacturers) to train production employees and commission production equipment. Additional information about the battery can be found in our previous paper: Rosenberg et al [35].…”

Knowledge Graph Construction of End-of-Life Electric Vehicle Batteries for Robotic Disassembly

“…It improved the efficiency and digitalization of battery disassembly. Sonja Rosenberg et al [14] explored how different disassembly steps affect EV battery disassembly time. The cost of a disassembly plant was also estimated.…”

Automated Battery Disassembly—Examination of the Product- and Process-Related Challenges for Automotive Traction Batteries

“…Either the housing cover or the switch box is removed first, depending on whether the latter is located on the outside of the housing cover. In both cases, this is mostly done by loosening a number of screws [20]. As these screws are located in the outer area of the battery, the condition (deformation, dirt, or corrosion) plays a decisive role in the feasibility of the process step [21].…”