CATL confirmed on August 10, 2026 that it will begin small-scale trial production of all-solid-state batteries starting in 2027.
Key News Facts
The product carries CATL’s own brand name, “Ningde Shidai All-Solid-State.” Following BYD, CATL is the second major cell maker to formalize an all-solid-state pilot-production target. Early sulfide-based cells reportedly confirmed a cell-level energy density of 500Wh/kg under laboratory conditions. This is reported to be roughly double the best currently mass-produced lithium-ion pack level, but since the figure is a laboratory-condition value, it requires re-verification when applied to mass production. Toyota and Idemitsu are targeting mass production in 2027–2028, which overlaps in timing with CATL’s 2027 pilot target.
Mechanical-Design Impact Analysis
Sulfide-based solid electrolytes react with atmospheric moisture, so pilot lines typically require a dew-point-controlled dry-room specification (the process chemistry mechanism itself is not covered here and is referenced only as a boundary condition). This means the equipment’s sealed-enclosure structure and sealing specifications must be strengthened compared with existing liquid-electrolyte lines. At the pilot stage, the smaller the line scale, the more flexibility is prioritized over equipment standardization, so from a domestic equipment maker’s standpoint, demand may first arise for modular press/stacking equipment capable of handling low-volume, high-mix production (estimated; basis: the industry convention that equipment redesign rates are high when transitioning from pilot to mass production). The pressing-stack equipment needed for the compression/sintering process is expected to differ in load scale from liquid-electrolyte assembly processes, but the specific load values are undisclosed.
Spec Comparison Table
| Item | CATL (confirmed 2026-08) | BYD (earlier announcement) |
|---|---|---|
| Pilot target timing | 2027 | Ahead of CATL |
| Cell chemistry | Sulfide-based all-solid-state | Undisclosed |
| Reported energy density | 500Wh/kg (laboratory, cell-level) | Undisclosed |
| Production stage | Small-scale trial production | Undisclosed |
One-line summary: For CATL’s 2027 solid-state pilot, changes in dry-room and pressing-equipment specifications are practically a bigger variable than the energy-density figure itself.