# Advances in Battery Materials and Production Standards > Live situation record from CLSTR: https://clstr.news/situations/advances-in-battery-materials-for-evs > Updated: 2026-09-17T08:30:00.000Z. Sources: 78. Developments: 13. Developments in battery chemistry and service infrastructure are accelerating as manufacturers move toward industrial-scale validation and enhanced quality control. BYD continues to refine its solid-state technology, targeting a 400 Wh/kg 60 Ah pilot cell for 2027. BYD Senior Vice President Stella Li has confirmed that the company plans to launch its first electric vehicle equipped with solid-state technology in 2027. This initial rollout will serve primarily as a “technology validation and demonstration model” rather than a mass-market product. Utilizing sulfide-based chemistry, the technology aims for an energy density approximately double that of current second-generation Blade batteries, with prototypes already achieving 1,218 kilometers under the CLTC cycle. Due to high manufacturing costs, initial production is expected to be limited to a small series of approximately 1,000 vehicles, likely integrated into high-end brands such as Yangwang, with full-scale mass production projected for around 2030. At the IAA Transportation 2026 in Hannover, BYD expanded its commercial offerings by unveiling the ETT 44, an electric 4x2 heavy-duty tractor for the European market. The vehicle features a 651-kWh Blade battery with a 44-tonne payload capacity and a range of up to 600 kilometers. To facilitate long-haul logistics, it utilizes Megawatt Charging Standard (MCS) technology, enabling charging from 20% to 80% in approximately 20 minutes at speeds exceeding 1.5 MW. Additionally, the Chinese market saw an update to the 2027 BYD Yuan Pro (Atto 2), which now features a larger 51.13-kWh battery providing a 501 km CLTC range. In the premium segment, BYD’s sub-brand Denza is expanding its lineup. The Denza Z9S sedan is scheduled for a Chinese market debut in late September 2026, offering a range of up to 1,100 km under the CLTC cycle. ## Claims - Solid-state batteries are expected to provide higher energy density, lower fire risk, faster charging, better low-temperature performance and longer lifespan. (corroborated by 6 sources) - BYD filed six new patents on solid-state battery technology in 2024. (corroborated by 5 sources) - The patents focus on a dual-electrolyte cathode using halide and sulfide electrolytes. (corroborated by 4 sources) - Industry reports announce the first pilot production lines for solid‑state cells, marking a shift from lab to industrial scale. (corroborated by 4 sources) - BYD aims to start pilot production of solid-state cells by 2027. (corroborated by 4 sources) - The patents address interface problems between solid electrolytes and electrodes to improve cycle life and thermal stability. (corroborated by 3 sources) - BYD unveiled the ETT 44 electric heavy-duty tractor at IAA Transportation 2026. (corroborated by 3 sources) - The ETT 44 has a maximum range of up to 600 kilometers. (corroborated by 3 sources) - The truck can charge at over 1.5 MW using the Megawatt Charging Standard (MCS). (corroborated by 3 sources) ## Timeline ### 2026-09-17: BYD unveils ETT 44 electric heavy-duty truck and targets 2027 for solid-state batteries BYD unveiled the ETT 44 electric heavy-duty truck at IAA Transportation 2026, featuring 600km range and ultra-fast 1.5 MW charging. The company also targets 2027 for its first solid-state battery vehicle. 13 sources. https://clstr.news/cluster/byd-launches-2027-yuan-pro-electric-suv-in-china ### 2026-09-14: BYD targets 2027 for solid-state battery vehicle debut BYD plans to launch its first solid-state battery vehicle in 2027, while its Denza sub-brand expands with high-range models like the Z9S and N8L SUV. 8 sources. https://clstr.news/cluster/byd-to-launch-solid-state-battery-vehicle-in-2027 ### 2026-09-07: CATL expands global battery repair services to mitigate quality risks CATL is expanding its Ning Service network to 100 global cities by 2026, offering cell-level battery repairs to reduce costs and addressing industry-wide quality concerns caused by rapid EV market growth. 2 sources. https://clstr.news/cluster/catl-expands-global-battery-repair-services-to-mitigate-quality-risks ### 2026-09-06: Xiaomi and Chery advance EV battery technology and market expansion Xiaomi introduces Dragonscale batteries with lifetime safety guarantees and plans a 2027 European expansion, while Chery invests $1.5 billion in next-generation battery technology. 14 sources. https://clstr.news/cluster/xiaomi-unveils-dragonscale-battery-with-lifetime-fire-protection-guarantee ### 2026-09-03: Chery invests $1.5 billion in solid-state batteries and hits 20 million sales Chery announces a $1.5 billion investment in solid-state battery technology for 2027 vehicle testing while celebrating a milestone of 20 million total vehicles sold worldwide. 8 sources. https://clstr.news/cluster/chery-invests-15-billion-in-solid-state-batteries-and-hits-20-million-sales ### 2026-08-31: Geely announces solid-state battery technology for 1,000 km range Geely and Samsung are developing advanced solid-state batteries capable of providing up to 1,000 km of range, with Geely targeting testing for its various brands by 2027. 2 sources. https://clstr.news/cluster/geely-announces-solid-state-battery-technology-for-1000-km-range ### 2026-08-25: CATL and BYD advance solid-state battery development CATL and BYD target 2027 for solid-state battery pilot production, while the EU prepares mandatory digital battery passports for 2027 to track EV battery health. 4 sources. https://clstr.news/cluster/chinese-battery-makers-target-2027-for-solid-state-technology-tests ### 2026-08-19: Geely targets 2027 pilot for 500 Wh/kg solid-state batteries Geely plans to pilot solid-state batteries in 2027, targeting 500 Wh/kg energy density and over 1,000 km of range for brands like Volvo and Polestar. 10 sources. https://clstr.news/cluster/geely-tests-solid-state-batteries-for-extended-ev-range ### 2026-08-15: CATL expands battery repair network and advances solid-state technology CATL is expanding its global battery repair network to 100 cities by 2026 and developing hybrid LFP/NCM cells and solid-state batteries, with pilot production for the latter slated for 2027. 3 sources. https://clstr.news/cluster/catl-announces-hybrid-cell-technology-and-2027-solid-state-battery-pilot ### 2026-08-09: BYD and CATL target 2027 for solid-state battery pilot production Battery giants BYD and CATL aim to start pilot production of solid-state batteries by 2027, targeting mass market availability around 2030 to enable longer ranges and improved safety for electric vehicles. 5 sources. https://clstr.news/cluster/byd-and-catl-target-2027-for-solid-state-battery-pilot-production ### 2026-08-06: BYD advances solid-state battery technology with new patents and 2027 production goal BYD aims to start pilot production of solid-state batteries by 2027, utilizing new dual-electrolyte cathode patents to improve stability and energy density. 15 sources. https://clstr.news/cluster/byd-advances-solidstate-battery-patents-as-pilot-production-rolls-out ### 2026-07-31: BYD patents new solid‑state battery cathode to curb degradation BYD patents a composite cathode using halide and sulfide particles to maintain contact in solid‑state batteries, tackling degradation, but mass production remains years away. 2 sources. https://clstr.news/cluster/byd-patents-new-solidstate-battery-cathode-to-curb-degradation ### 2026-07-30: New Battery Binders and Silicon‑Carbon Cells Promise Longer Range for EVs and Phones Hybrid polymer binders and silicon‑carbon anodes boost lithium‑ion battery performance, promising longer EV range and phone battery life without major new equipment. 3 sources. https://clstr.news/cluster/new-battery-binders-and-siliconcarbon-cells-promise-longer-range-for-evs-and-phones --- Cite as: Advances in Battery Materials and Production Standards. CLSTR, https://clstr.news/situations/advances-in-battery-materials-for-evs