BYD: Solid-State and Sodium-Ion Battery Advances

• Source: https://www.electrive.com/2026/02/09/byd-makes-advances-in-sodium-ion-and-solid-state-batteries/
• Type: technical-report
• Institution: BYD
• Date Ingested: 2026-04-05T20:00:00Z
• Tags: solid-state, sodium-ion, byd, production-line

Key Contribution

BYD offlined 60Ah all-solid-state cell. Sodium-ion achieving 10,000 cycle life. 20 GWh production line at Chongqing Bishan facility. Targeting $70/kWh cost. Vehicle installation planned for 2027.

Summary

BYD is advancing on two parallel battery technology fronts: all-solid-state lithium batteries for high performance, and sodium-ion batteries for cost-optimized applications. Both programs have reached significant manufacturing milestones.

Solid-State Battery

• Cell capacity: 60 Ah all-solid-state cell completed (offlined from production line)
• Status: First production-representative cells manufactured
• Vehicle timeline: 2027 target for vehicle installation
• Significance: 60 Ah is a commercially relevant cell size, not a lab sample

Sodium-Ion Battery

• Cycle life: 10,000 cycles — exceptional longevity (vs ~1,000-2,000 for typical Li-ion)
• Application: Grid storage, low-cost EVs, energy storage systems
• Cost advantage: Sodium is abundant and cheap (vs lithium supply constraints)
• Use case: Complements solid-state for different market segments

Manufacturing Scale

• Chongqing Bishan facility: 20 GWh production line — substantial capacity commitment
• Cost target: $70/kWh — would make EVs cost-competitive with ICE vehicles without subsidies
• Production approach: Leveraging BYD's existing manufacturing infrastructure and vertical integration

Strategic Position

• BYD is the world's largest EV manufacturer and second-largest battery maker
• Dual chemistry strategy: solid-state for premium (high energy density) + sodium-ion for mass market (low cost, long life)
• $70/kWh target would be industry-leading if achieved at scale
• Vertical integration from raw materials to finished vehicles

Significance

BYD's dual approach is strategically sound: solid-state for the performance segment (long range, fast charging) and sodium-ion for the volume segment (affordable EVs, grid storage). The 10,000-cycle sodium-ion battery could transform grid storage economics. The $70/kWh target, if achieved, would be a tipping point for global EV adoption — well below the ~$100/kWh threshold generally considered necessary for EV-ICE cost parity. The 20 GWh production line shows BYD is moving beyond laboratory prototypes.