The EU's New Battery Regulation carbon footprint requirements are being phased in: from February 2026, third-party verified carbon footprint declarations must be submitted; from 18 August, A-to-E class labels must be affixed; from August 2027, the battery passport takes effect; and from 2029, products exceeding limits will be banned from sale. About 40% to 50% of a power battery's carbon footprint comes from upstream mining and smelting, making it hard to meet the standard through factory green power alone. Leading players are sprinting ahead through green power substitution, closed loops of recycled materials, sodium-ion innovation and cascading carbon data upstream, while smaller suppliers' data capabilities and standard-setting influence have become key variables.
1. Timeline: Four Checkpoints Tightening in Sequence Within Four Years
The EU's New Battery Regulation advances its carbon footprint requirements in stages rather than all at once. From February 2026, industrial batteries and energy storage batteries must submit a third-party verified carbon footprint declaration; from 18 August 2026, batteries exported to the EU must carry a carbon footprint class label, graded from A to E by emission level, with lower grades being more competitive; from August 2027, the "battery passport" is fully implemented, giving every battery a unique digital identity recording its composition, carbon footprint and recycled material ratio; and from 2029, products exceeding carbon emission limits will be banned from sale outright. Other reports mention February 2028 as the implementation point for the maximum carbon footprint threshold, with energy storage battery limits cited at around 100 kgCO₂e/kWh, though specifics still await confirmation in EU detailed rules.
Europe is China's largest overseas market for power batteries, with more than about 30% of exports going to the EU. A low carbon data grade means a disadvantage in EU procurement bidding, directly affecting order acquisition. The carbon footprint has thus shifted from an "environmental bonus" to a "market access requirement".
2. Where the Carbon Comes From: 40% to 50% Concentrated in Upstream Mining and Smelting
According to industry research data, the full-lifecycle carbon emissions of a power battery are roughly distributed across four stages: upstream mining and material smelting account for about 40% to 50%, cell manufacturing for about 20% to 30%, the use phase for about 10% to 20%, and recycling shows a "negative carbon" contribution. In the new energy vehicle manufacturing stage, power battery production contributes about 40% to 50% of carbon emissions.
This structure determines where decarbonization efforts must focus: using green power at the cell factory alone is not enough. If upstream lithium, nickel and cobalt are smelted with coal-fired power, the carbon footprint of the entire pack still struggles to meet the standard.
3. Four Decarbonization Paths: From Green Power Substitution to Upstream Transmission
Green power substitution on the manufacturing side is the most direct path. CATL achieved carbon neutrality in its core operations by the end of 2025, mainly through large-scale use of renewable energy in manufacturing; Panasonic has proposed achieving substantially zero emissions at all global production sites by fiscal 2028, with renewable energy generation reaching 100%, and reducing battery manufacturing carbon footprint by 50% by 2030. Domestically, Sichuan, leveraging its green power resources and industrial chain base, ranked first nationwide for the first time in the "Power Battery Industry Development Index (2026)", as low-carbon manufacturing becomes a new dimension of regional competition.
The closed loop of recycled materials is the second path. Research shows that power batteries produced with recycled materials can reduce full-lifecycle carbon emissions by about 60% compared with virgin materials. CATL's Brunp Recycling achieves recovery rates of 99.6% for nickel, cobalt and manganese and 96.5% for lithium, and has built a recycling system through 1,200 global service outlets. Cascade utilization is the first gate in the recycling chain: retired batteries usually retain about 80% usable capacity and, after screening and reassembly, can be used for telecom base station backup, photovoltaic storage, microgrid peak shaving and other scenarios, reducing apportioned manufacturing-stage carbon emissions by about 15%.
Innovation in material systems is the third path. Sodium-ion batteries do not rely on scarce minerals such as lithium, cobalt and nickel, and can reduce full-lifecycle carbon emissions by up to 60% compared with lithium batteries; CATL says it has begun applying them in energy storage in 2026.
The fourth path is extending decarbonization pressure upstream. Policy now requires new and expanded lithium mine smelting projects to build renewable energy generation facilities covering no less than 60% of annual electricity consumption, or to directly purchase green power; otherwise carbon accounting will default to the highest-tier fossil energy emission factor.
4. Chain Leaders Drive It: Carbon Data Requirements Written Into Supply Contracts
Leading battery companies are writing carbon requirements into supply contracts. CATL requires suppliers to provide carbon footprint data from 2027 and offers preferential terms to those with better carbon performance. Envision AESC equips every battery with a "zero-carbon green code", so customers can scan it to view green power usage and carbon emission data; Easpring built a plant in Finland, where clean energy use at its overseas base approaches 100%, to meet the EU's multiple standards on carbon footprint, battery passport and supply chain due diligence.
During the 2026 World Power Battery Conference, the battery industry green supply chain initiative and the zero-carbon transport corridor project along Sichuan's section of National Highway 318 were launched simultaneously, as the boundary of zero carbon extends from factories to transport and supply chain links.
5. Unresolved Issues: Data Capability and Standard-Setting Influence
The challenges are equally concrete. Upstream small and medium-sized suppliers lack the capability to collect carbon data, and some cannot yet complete their own carbon emission accounting; the stability and cost of recycled materials remain to be verified; and green power supply is still unstable in some regions. A more hidden problem lies in standard-setting influence — carbon footprint accounting currently mainly adopts the EU's PEF methodology, which emphasizes plant-level data rather than industry averages. Chinese companies need to build their own carbon data collection and accounting systems rather than responding with "industry averages".
CATL Chairman Robin Zeng said at the core operations carbon neutrality launch event that "batteries that are not zero-carbon will be eliminated by the times". Whether that judgment proves true remains to be seen, but the compliance timetable is set: full-chain carbon data capability is becoming a competitive variable alongside capacity and cost.
