EPO and IEA Report Seven-Fold Rise in Battery Recycling Patents Over Past Decade

The European Patent Office (EPO) and the International Energy Agency (IEA) published a joint report on April 29, 2026, documenting a seven-fold increase in international patent families (IPFs) related to battery circularity over the past decade. The report records an average annual growth rate of 42% for battery circularity IPFs between 2017 and 2023, far outpacing both the 16% annual growth rate for rechargeable battery manufacturing overall and the 2% growth rate across all technical fields during the same period.

Growth Drivers

The report attributes the surge in battery circularity patenting to two primary forces. First, the rapid global uptake of electric vehicles (EVs) is generating substantial volumes of batteries approaching end-of-life, with a sharp increase in batteries requiring recycling or repurposing projected from the mid-2030s onward. Second, regulatory requirements in Europe and China now place direct responsibility on manufacturers for the end-of-life management of EV batteries, creating strong commercial incentives to develop proprietary recycling and repurposing technologies.

The European Union’s Battery Regulation, which entered into force in 2023, establishes mandatory targets for battery collection rates and the recovery of specific critical raw materials, including lithium, cobalt, nickel, and copper. China has similarly strengthened its regulatory framework for battery collection and processing, reinforcing innovation pressure across the supply chain.

Geographic Distribution

Asian applicants accounted for 63% of battery circularity IPFs in 2023. Chinese companies, in particular, are increasingly seeking patent protection outside their domestic market, reflecting both growing international commercial ambitions and the structure of global battery supply chains in which Chinese entities hold significant positions across multiple stages. European companies and research institutes hold approximately 20% of relevant IPFs, with particular strength in technologies for battery collection logistics and chemical transformation processes that yield purified raw materials for use in new battery production.

Key Technology Areas

Battery circularity encompasses several distinct technology categories, each representing active areas of patenting activity. These include systems for the collection and transportation of used batteries; mechanical, thermal, and hydrometallurgical processes for disassembling and separating battery components; chemical transformation techniques to recover lithium, cobalt, manganese, and other critical minerals; and direct recycling and repurposing methods that preserve the functional properties of battery materials. The report identifies chemical transformation for raw material recovery and direct recycling as the fastest-growing sub-categories by patent volume.

Strategic Implications for IP Practitioners

The patent landscape in battery circularity is becoming increasingly dense, particularly for technologies at the intersection of material science, electrochemistry, and process engineering. Companies operating in the EV supply chain — from battery manufacturers to automotive OEMs — face growing exposure to third-party patent rights in recycling and repurposing processes that will become operationally essential as end-of-life volumes rise. At the same time, the field offers significant opportunities for portfolio development in an area where technical innovation is still outpacing standardisation.

The concentration of Asian — and particularly Chinese — applicants in international patent families also raises questions about freedom-to-operate in key markets for companies that have not yet built defensible positions in battery circularity IP. As regulatory requirements translate into mandatory commercial practices, access to licensed or owned technology in this space will take on increasing strategic importance.

The full report is available on the official websites of the EPO and the IEA.