The journey begins with the extraction of essential materials such as lithium, cobalt, nickel, and graphite from mines around the world. This stage significantly impacts the environment due to the ecological footprint associated with mining activities. Following extraction, these materials undergo extensive processing until assembly into battery cells. These are subsequently assembled into battery systems which are then integrated into the vehicle.
Use and end of life.
Once in operation, electric vehicle batteries last around ten to fifteen years, with their lifespan being influenced by usage patterns and technological advancements such as improved thermal materials and optimized battery management systems. After reaching the end of their initial use in electric vehicles, effective end-of-life management becomes essential. At this stage, batteries can either be repurposed for secondary applications or recycled to recover valuable materials.
Recycling: a growing sector
Battery recycling has emerged as a key component of material security in Europe. As European countries strive for greater sustainability and reduced dependence on primary raw materials, regulations to improve recycling rates were implemented in 2023. These efforts not only enhance resource recovery but also minimize the environmental impact compared to mineral mining.
A detailed overview of battery recycling in Europe reveals a growing network of facilities dedicated to this purpose, with countries such as Germany, France, and Sweden standing out for their recycling infrastructures. In 2023, Europe had a total recycling capacity of approximately 17,000 tons for batteries. Projections indicate that this capacity will rise significantly to 290,000 tons by 2030, reflecting the rapid growth in recycling demand.
[1] Recycling capacity refers to the announced material input capacity of existing and planned recycling facilities. This capacity can relate to (1) battery systems in recycling plants that include battery dismantling and discharging, (2) battery modules for mechanical recycling, and (3) black mass for hydrometallurgical processing. In facilities that combine mechanical recycling and hydrometallurgy, the recycling capacity is determined by the input material for mechanical recycling.
How does battery recycling work?
Battery recycling requires a sequence of different processes to separate and recover different types of materials. The process route starts with end-of-life batteries and ends with the materials for the production of new batteries. The procedures involved can be categorized into preparation, mechanical processes, thermal processes, pyrometallurgy, and hydrometallurgy. Pre-processing is the initial step in which batteries are discharged and disassembled to module level. While mechanical methods vary widely in approach, they generally involve crushing followed by sieving. All the process routes end with hydrometallurgy, as it allows separate recovery of valuable elements like lithium, cobalt, and nickel through chemical reactions. Pyrometallurgical processes, in which the batteries are melted at around 1,500 °C to extract the metals, are an alternative. However, pyrometallurgy suffers from drawbacks including the loss of lithium in the slag and the consumption of a substantial amount of energy.
A key aspect of the successful implementation of a holistic recycling process chain lies in the disassembly of battery systems. The objective of the disassembly is to create homogeneous material fractions in preparation for mechanical processing and the subsequent recycling steps.
Current battery disassembly is characterized by a manual process in which personnel trained in high voltage carry out the steps to remove the system components. Manual disassembly presents numerous challenges that can hinder efficiency as well as safety standards within recycling facilities. Workers are confronted with safety risks from high-voltage hazards and toxic materials contained in the batteries while engaging in labor-intensive tasks requiring specialized skills – often resulting in higher costs associated with manual operations. Although manual disassembly can be flexibly adapted to the topology and condition of the battery pack, scaling the process on an industrial and economic level remains challenging. This issue becomes increasingly significant as more battery systems are returned from their service life in electric vehicles in the upcoming years.
To overcome these challenges, innovations in automated disassembly technologies are gaining traction as effective solutions within the industry. Companies are developing robotic systems capable of safely disassembling batteries with greater precision than human workers could achieve manually. These automated systems are intended to enhance operational efficiency by reducing disassembly time while improving safety standards across facilities handling potentially hazardous materials.
An illustration of an automated disassembly plant located in Aachen, Germany, showcases robots performing tasks such as unscrewing components or separating different materials effectively – all while minimizing risks associated with manual handling and reducing process times. These automated systems require extensive product and process-related data, which should ideally be available in a standardized format. Research is therefore being conducted on this topic in connection with the automation of battery pack disassembly.
