In addition to solid-state lithium batteries, BYD is also advancing sodium-ion battery development in parallel, mass production determined by market demand.
BYD is pursuing a multi-track technology strategy in the solid-state battery field, according to information disclosed by the company’s investor relations department and cited by Cailian Press on February 9.
Among the various approaches, sulfide-based solid-state batteries are regarded as BYD’s most critical breakthrough direction at present.
The company has made phased progress in battery lifespan and fast-charging performance, with a target of achieving small-scale production around 2027.
BYD began investing in solid-state lithium battery research prior to 2016. In 2022, the company completed development of a 10 Ah solid-state battery prototype with an energy density of 280 Wh/kg.
In 2024, a 60 Ah all-solid-state battery pilot unit rolled off the line, and a trial production line was launched at BYD’s Bishan base in Chongqing.
From a technical standpoint, BYD’s all-solid-state battery adopts a sulfide composite electrolyte, paired with high-nickel ternary cathode materials and silicon-based anodes.
According to officially disclosed specifications, the battery cell can achieve an energy density of up to 400 Wh/kg.
It enables vehicle driving ranges exceeding 1,000 km, supports charging from 0 to 80% in 10 minutes, and delivers a cycle life of up to 10,000 cycles.
According to the roadmap, BYD plans to initiate small-scale demonstration vehicle deployment of all-solid-state batteries in 2027, with initial applications on high-end brands such as Yangwang. The demonstration fleet is expected to comprise around 1,000 vehicles.
By 2030, as costs gradually decline, the installation scale is expected to expand to about 40,000 vehicles and extend to mid-to-high-end models under the Dynasty and Ocean series, with the goal of achieving cost parity between solid-state and liquid lithium batteries.
By 2033, BYD also plans to open solid-state battery supply to external customers, with deployment volumes exceeding 120,000 vehicles.
In addition to solid-state lithium batteries, BYD is also advancing sodium-ion battery development in parallel.
The company has entered the third-generation technology platform stage and has introduced sodium-ion products capable of achieving up to 10,000 charge cycles. The pace of mass production will be determined by market demand.
Across the industry, all-solid-state batteries have become a shared focus among major automakers.
Changan Automobile plans to launch a prototype vehicle equipped with all-solid-state batteries in 2025, with gradual mass production targeted for 2027.
Geely Automobile expects to complete vehicle-level validation of all-solid-state batteries in 2026 and achieve scaled deployment in 2027.
SAIC Motor has already completed its all-solid-state battery production line, with the first “Guangqi Battery” scheduled for mass production in 2027.
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