- BYD filed patent CN121983643A for a composite solid electrolyte membrane.
- Key technical challenges: solid-solid interfacial stability and lithium dendrite suppression.
- BYD targets 2027 for pilot-scale deployment.
- BYD's market share dropped from 22.5% (May 2025) to 16.8% (April 2026).
- Company remains 100% reliant on LFP technology for current fleet.
- Solid-state is viewed as a long-term R&D goal rather than an immediate replacement for LFP.