Disassembly and processing mainly include three steps: first, battery evaluation; second, disassembling the battery into modules; third, disassembling the modules into individual cells. The overall process includes scanning and data entry, battery pack storage, surface cleaning, residual energy detection and charge-discharge testing, preliminary disassembly, secondary disassembly of battery modules, inspection and sorting, as well as cell sorting and performance evaluation. The collection and transportation of this by-product are not considered within their respective market activities. This dataset applies to the disassembly process of retired lithium iron phosphate (LiFePO4) battery cells.