Technology and R&D Roadmap for GEN4 and GEN5 Batteries

The technological and R&D roadmap extends beyond Generation 4, encompassing upcoming generations that will shape the future landscape

The advancement of solid-state battery technology at Blue Solutions focuses on iterative improvements in performance, energy density, and scalability for a wide range of applications, including passenger cars, light commercial vehicles and next-gen mobility solutions.

Below is a detailed roadmap outlining current and future milestones for GEN4 and GEN5 battery generations, as well as their respective technological innovations and impact on the solid-state battery industry.

Recycling

GEN4

  • Room-temperature polymer compatible with high-voltage (HV) cathodes.
  • Incremental design improvements to enhance reliability and manufacturing efficiency.

  • Further optimization leading to unmatched energy efficiency and scalability for EVs.
  • Aimed at providing 450Wh/kg: unmatched energy density and lightweight solid-state battery packs for durable electric transportation.

Targeting advanced solid-state battery systems for long-term applications in passenger cars, light commercial vehicles, and new mobility models and much more.

Target SOP (Start of Production) in 2030, marking a pivotal point for widespread adoption in commercial and passenger vehicle markets.

GEN5

  • Battery Chemistry
    Implementation of higher cathode loadings for increased capacity and energy output.
  • Performance Improvements
    Target energy densities increase of up to +15% gravimetric density and +25% volumetric density, providing significantly improved range, capacity, and compact battery designs for next-gen EVs.
  • Applications
    Designed for the next generation of large spread commercial vehicle platforms, passenger vehicles and new applications, as well as demanding energy storage solutions
  • Timeline
    Technology readiness planned for post-2035, setting a long-standing and robust new industry standard for solid-state battery technologies.
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02/11/2026

GEN4 Battery Technology Development Update: Fast Charging

Blue Solutions' Gen4 battery development journey is progressing. Today, we're sharing our fast charging performance on Lithium metal cells with 10Ah of capacity.
Our technology can charge in under 11.5 minutes, recovering 70% of the battery capacity at 40°C, at a charging rate of 3.6C.
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07/10/2026

GEN4 Battery Technology: Development Update

Our GEN4 battery development journey is progressing, a stable Lithium-Metal chemistry that is showing meaningful results in current testing. Our 10Ah A-sample cells are nearing 900 cycles, a performance level that has been independently validated by the Fraunhofer ISE Lab on 1Ah cells.

This technology is designed to operate across a wide range of temperatures, support fast charging of up to 70% capacity in under 15 minutes, and achieve energy densities above 400 Wh/kg enabling potential EV range improvements of up to 50%, while remaining compatible with competitive manufacturing processes.
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GEN4 Battery: How Blue Solutions is revolutionizing electric mobility with its groundbreaking technology
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GEN4 Battery: How Blue Solutions is revolutionizing electric mobility with its groundbreaking technology

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A French expert in solid-state batteries since 1997 with an international presence, Blue Solutions is developing its fourth generation of lithium-metal batteries. This cutting-edge innovation offers more efficient and higher-performing energy management for equipped vehicles. Interview with Richard Bouveret, Chairman and CEO of Blue Solutions.
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A specialist in solid-state batteries for almost 30 years, Blue Solutions is leveraging its cutting-edge expertise to revolutionize the range and safety of electric vehicles and connected devices, while tackling the industrial challenges of large-scale production. Interview with Richard Bouveret, Chairman and CEO of Blue Solutions.
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Blue Solutions' GEN4 platform is redefining the benchmarks for sustainable and competitive battery technology through groundbreaking innovations in fast charging, high energy density, and circularity pathways. Positioned at the forefront of Europe's battery value chain transformation, Blue Solutions is committed to driving a sustainable and electrified future.
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On August 27, 2025, at 1:20 PM in Zurich, Richard BOUVERET, CEO & Chairman of Blue Solutions, delivered a keynote on ‘Battery Industrial Scale‑Up Challenges & Business Trends in Europe and Beyond.’ This article previews what to watch, why it matters for Europe’s electrification push, and how Blue Solutions’ leadership is shaping industrialization of solid‑state batteries.
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