Tech

WeLion New Energy and its semi-solid-state batteries

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Based on a feed excerpt; full article content has not been acquired. Source evidence retrieved 06/10/2026, 11:20:24 UTC.

Briefings

WeLion New Energy developed semi-solid-state batteries with an energy density of 824 wh/kg in 2025, surpassing standard lithium-ion batteries. In 2023, a partnership with Nio produced a battery pack at 360 wh/kg, though limited production prevented widespread deployment. The company also operates cargo ship batteries and plans to launch drone batteries in 2026 with 410 wh/kg. Key figures include Chen Liquan, a cofounder and former lead of China's first all-solid-state battery project in 1988. Production capacity stands at 11 GWh annually, with two new inland ship plants under construction.

Key points

• WeLion achieved an energy density of 824 wh/kg in 2025 testing, representing more than three times the standard lithium-ion battery capacity.
• A 2023 partnership with Nio produced a battery pack at 360 wh/kg, which was deployed despite high production costs limiting the total number of units manufactured.

Context and limitations

The 2025 prototype details remain unclear regarding charge cycles and capacity degradation. Production costs for semi-solid-state batteries are significantly higher than conventional lithium-ion options, creating market competition challenges.

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