BYD files six solid-state battery patents as 2027 pilot production target emerges. The patents cover electrolyte interfaces, cathode structures and manufacturing processes as BYD advances its next-generation battery programme. Prefer on Google Discover more Vehicle Conversion Kits Power Supplies EV News Subscription BYD has filed six new patents covering materials, cell structures and manufacturing techniques for solid-state batteries, adding to the Chinese automaker's efforts to develop next-generation battery technology for electric vehicles. The filings focus heavily on improving the interface between electrodes and solid electrolytes, an area that remains critical to the performance and durability of solid-state cells. The developments come as Chinese media reports that BYD is targeting small-scale production of dual-electrolyte solid-state cells in 2027, although the automaker has not officially confirmed that timetable. Patents target electrolyte and cathode stability. Four of the patents address battery materials and chemistry. One filing proposes an ion-conducting interlayer positioned between halide and sulphide solid electrolytes. The layer is designed to remain electrochemically stable while limiting unwanted reactions between the two electrolyte materials, potentially improving cell durability and cycle life. Another patent describes the use of a first solid electrolyte as a buffer between the active cathode material and a sulphide electrolyte. BYD says the structure is intended to improve chemical stability while controlling heat generation. The patent specifies that the active cathode layer should release no more than 117 joules per gram under defined thermal conditions. Two additional filings address cathode construction. One outlines a composite cathode incorporating monocrystalline and polycrystalline cathode materials alongside different solid electrolytes. Discover more electric vehicle Green Transport News Automobile Battery Sales The proposed design seeks to combine the structural stability associated with monocrystalline materials with the stronger rate performance of polycrystalline materials. A separate patent describes a three-material cathode in which lithiated metal oxides and metal sulphides are combined with a solid electrolyte. The structure is intended to reduce resistance at material interfaces while improving specific capacity and extending battery cycle life. BYD develops manufacturing and quality controls. The other two patents focus on production techniques rather than battery chemistry alone. One introduces ionic-liquid wetting agents distributed in a gradient across an electrode. The approach is designed to improve ion movement while maintaining consistent contact between solid materials during cell operation. The second establishes a measurement referred to as "Re", which evaluates the contact ratio between cathode and electrolyte particles. BYD specifies that at least 60% of the perimeter of a cathode particle should be in contact with electrolyte particles to support charging performance, capacity and durability. The patents indicate that BYD's development programme is addressing not only the composition of solid-state cells but also the manufacturing precision required to make the technology viable at scale. 2027 production reports remain unconfirmed. The latest filings follow a solid-state battery patent granted by the China National Intellectual Property Administration in late July covering composite cathode structures. Chinese media reports have linked BYD's recent research to plans for small-scale production of solid-state cells based on its dual-electrolyte cathode design in 2027. The initial batteries are reportedly expected to undergo testing in prototype vehicles before any broader rollout. Discover more Transport Finance Consulting automotive industry BYD has not publicly confirmed the reported 2027 production schedule. The company has previously outlined a longer-term solid-state battery roadmap. BYD said last year that it had produced its first solid-state battery cells and was targeting demonstration vehicles from 2027, with wider commercialisation expected toward the end of the decade. The automaker has also continued research into sodium-ion batteries, indicating that it is pursuing several next-generation battery chemistries at the same time. Solid-State batteries still face production hurdles. Despite growing investment in the technology, manufacturing solid-state batteries at large scale remains a significant challenge for the industry. CATL Chairman Robin Zeng said in June that engineering and production limitations mean solid-state batteries are still several years away from widespread mass-market adoption. For BYD, the latest patent activity highlights an effort to address some of those challenges through improvements to electrode-electrolyte interfaces, cathode design and production processes as the company works toward vehicle-level testing and eventual commercialisation.

Tata Motors takes top spot in world's most efficient EV beating Tesla. August 9, 2026 According to the International Council on Clean Transportation (ICCT) Global Automaker Ratings 2025, Tata Motors and Mahindra have emerged as the world's most energy-efficient electric vehicle manufacturers, outperforming global giants such as Tesla and BYD. The list evaluated 22 of the world's largest manufacturers in its 2025 Global Automaker Ratings. The report measures several aspects of each company's transition towards electric mobility. These include EV sales performance, manufacturing decarbonisation, feature readiness, and battery electric vehicle (BEV) efficiency. In the comparison of energy efficiency, Tata Motors secured the top position globally. The ICCT highlighted that its adjusted energy consumption figure of 106 Wh/km was the best among all manufacturers. Mahindra Automotive followed closely in second place with 113 Wh/km. Indian EV makers outperformed global leaders such as Tesla and BYD in energy efficiency, with Wh/km figures well below the global average of 131 Wh/km. Lower energy consumption per kilometre means vehicles use less electricity, improving efficiency while reducing both power usage and running costs for owners. Incidentally, Tata Motors beat BYD by consuming an average of 106 watt-hours per kilometre (Wh/km), compared to BYD's 120 Wh/km. In 2024, Tata introduced new EV models that diversified its offerings. Tata and subsidiary Jaguar Land Rover also ramped up efforts in battery recycling and repurposing in major markets. Geely and Chery, both in the Transitioners group, showed the most improvement in scores compared with 2023. Geely and Chery increased their ZEV-equivalent sales shares by 12 and 9 percentage points, respectively, while offering new models, and both shifted sales toward high-performing models that improved the average performance of their new BEV fleets. Automakers based in Japan and the Republic of Korea still lag behind, but Honda and Nissan have made progress. Honda introduced its first BEV model, the Prologue, in the United States, and its sales led to substantial improvements in all BEV performance metrics for the company. Nissan strengthened its ZEV ambition by separating its 40% by 2030 ZEV target from a previously announced target that included conventional hybrid vehicles. Meanwhile, you will see Tata passenger cars in Malaysia "very soon," as the company' looks to building a strong network with this Malaysian auto group that handles luxury and mid-segment vehicles. More will be shared in coming months (before Q4 2026) once Drive Safe and Fast get the go ahead from their their communication department.

BYD files six more solid-state battery patents. BYD has published six new patents covering key aspects of solid-state battery technology. The filings focus on improving the contact between electrodes and solid electrolytes as the company reportedly targets pilot production of dual-electrolyte cells in 2027. By Carla Westerheide 07.08.2026 - 12:13 Four of the new patents concentrate on materials and cell chemistry. One proposes adding an ion-conducting, electrochemically stable interlayer between halide and sulphide electrolytes to prevent unwanted chemical reactions and extend cycle life. Another uses a first solid electrolyte as a buffer layer between the active cathode material and a sulphide electrolyte, aiming to improve stability while limiting heat generation. According to the patent, the active cathode layer should not release more than 117 joules per gram under thermal conditions. Two further patents focus on the cathode structure itself. One describes a dual-layer composite cathode that combines monocrystalline and polycrystalline cathode materials with different solid electrolytes. BYD says the design seeks to combine the higher structural stability of monocrystalline materials with the superior rate performance of polycrystalline materials. Another patent proposes a cathode based on three materials, in which lithiated metal oxides and metal sulphides are mixed with a solid electrolyte to reduce interfacial resistance, improve specific capacity and extend cycle life. The remaining two patents move beyond materials science and towards manufacturing. One introduces ionic liquid wetting agents with a gradient distribution across the electrode to improve ion transport and maintain reliable contact between solid materials. The other defines a quality metric called 'Re' for the contact ratio between cathode and electrolyte particles. BYD states that at least 60 per cent of a cathode particle's perimeter should be in contact with electrolyte particles to improve charging performance, capacity and durability. The latest patents follow a solid-state battery patent granted by the China National Intellectual Property Administration (CNIPA) in late July covering composite cathode structures. According to Chinese media, BYD plans to start small-scale production of solid-state cells using its dual-electrolyte cathode design in 2027. The first cells are expected to be evaluated in prototype vehicles before any wider deployment. BYD has not officially confirmed the reported production timeline. These new reports build on the company's previously disclosed solid-state battery roadmap. Last year, BYD confirmed it had already produced its first solid-state battery cells and planned demonstration vehicles from 2027 before targeting broader commercialisation towards the end of the decade. Earlier this year, the manufacturer also revealed progress in both sodium-ion and solid-state battery research, underlining its strategy of developing multiple next-generation battery chemistries in parallel. While BYD continues to advance the technology, large-scale production remains a challenge across the industry. In June, CATL Chairman Robin Zeng cautioned that engineering and manufacturing constraints mean solid-state batteries are still several years away from mass-market deployment. Nevertheless, the technology remains a major focus for battery manufacturers. 1 comment. about "BYD files six more solid-state battery patents" Rusty Atwood 07.08.2026 um 14:23 Yes I have a new solid state battery design that's patient pending #64/099289 too! A car can go 1200 hundred miles and charge in 5 minutes plus it lasts 30 years.