Chinese automaker BYD has officially denied recent reports claiming that its highly anticipated solid-state battery technology will be installed in the Seal electric sedan. The company clarified that the online claims are inaccurate: “The information is false. The first model and its specifications have not been officially announced.”

The rumour originated from speculative reports suggesting that BYD’s Seal model would debut the new battery, featuring a record-breaking energy density of 400 Wh/kg and enabling a CLTC-rated range of up to 1,500 kilometres (932 miles) from a 12-minute charge. Some reports even cited a total range of 1,875 kilometres (1,165 miles) based on partial charge estimates. However, BYD’s latest statement clarifies that the company has not confirmed these details.

These developments follow BYD CTO Sun Huajun’s remarks earlier this year, outlining the company’s timeline for solid-state battery commercialisation. At the 2025 China Solid-State Battery Innovation Development Summit, Sun confirmed that BYD had begun installing prototype solid-state packs into Seal models for road testing. According to Sun, demonstration-scale deployment is expected around 2027, with mass-market adoption targeted for post-2030 once production scaling is achieved.

Internally, BYD has spent more than a decade developing solid-state battery technology. The firm began testing 20Ah and 60Ah solid-state cells last year and reportedly achieved key breakthroughs in energy density and fast-charging capability. Despite promising early test results, including potential parity in cost with current liquid lithium-ion batteries by the end of the decade, BYD has emphasised that mass production is still years away.

While BYD’s denial tempers short-term expectations, its ongoing test program and long-term roadmap signal strong intent to lead the next wave of battery innovation. For now, the public should cautiously treat any model-specific claims about BYD’s solid-state rollout unless confirmed by the company.

Source: Yiche