Blade battery

Lore & Background

The blade battery format was pioneered by FinDreams Battery, a subsidiary of BYD Company. BYD first disclosed the imminent mass production of its Blade Battery on 11 January 2020, when chairman Wang Chuanfu announced at the China Electric Vehicle 100 Forum that the new battery was close to production readiness. On the same day, BYD's head of international cooperation disclosed the battery held over 300 core patents. The formal public launch event was held on 29 March 2020, during which Wang stated the design aimed to 'erase the word "spontaneous combustion" from the dictionary of new energy vehicles.' Production commenced at the Chongqing FinDreams Battery plant with an initial planned annual capacity of 20 GWh, and the format debuted in the BYD Han EV in June 2020. By April 2021, BYD announced that all of its pure electric vehicle models would be equipped with the blade battery as standard.

Reader's Guide

The blade battery represents a significant shift in battery pack design by eliminating the module layer and using cells as structural crossbeams, forming a honeycomb-like structure that serves simultaneously as energy storage and structural reinforcement. Its elongated cell geometry increases surface-area-to-volume ratio, enhancing passive heat dissipation. Combined with LFP chemistry's high thermal stability, the design demonstrated exceptional safety in nail penetration tests, maintaining surface temperatures of 30–60 °C with no smoke or fire, compared to conventional NMC batteries exceeding 500 °C with violent combustion. The format has been adopted by multiple manufacturers: Geely introduced the Aegis battery in June 2024 with 192 Wh/kg energy density and over 3,500 charge cycles; SVOLT unveiled the Fengxing Short Blade Battery in January 2025 with a 6C charging rate enabling 10% to 80% recharge in 8.5 minutes; and BYD released a second-generation Blade Battery in March 2026 supporting extreme fast charging from 10% to 97% in nine minutes. The blade architecture has become a widespread industry standard, with variations such as 'short blade' batteries produced by companies like Geely and SVOLT.

Did You Know?

• A standard first-generation BYD 'long blade' cell measures 960 mm in length, 90 mm in height, and 13.5 mm in thickness.
• In nail penetration tests, blade LFP cells maintained surface temperatures of 30–60 °C with no smoke or fire, while conventional NMC batteries exceeded 500 °C and underwent violent combustion.
• BYD's second-generation Blade Battery, unveiled on 5 March 2026, can charge from 10% to 97% state of charge in nine minutes.
• SVOLT's Fengxing Short Blade Battery offers a long-life variant rated for 15 years or 600,000 km with over 5,000 cycles.