Electric Wheelchair (ZH-W001,ZH-W002 ,ZH-W003)

The Electric Wheelchair (models ZH-W001, ZH-W002, ZH-W003) is a motor-driven indoor and outdoor transportation vehicle designed to provide mobility to disabled or elderly persons limited to a seated position. It features a lightweight, compact design with a detachable seat cushion, flipback armrest, lithium battery power source, and joystick control for forward, backward, and turning movements.

The proposed device uses brushless DC motors (250W) compared to the predicate's 180W motors, and includes a 24V 12Ah li-ion battery versus the predicate's 20Ah capacity. Models ZH-W001 and ZH-W002 use aluminum alloy frames while ZH-W003 uses carbon steel (predicate uses aluminum only). Braking distances are slightly shorter (≤1.2m max versus 1.5m), maximum safe incline is 10° versus 9°, and maximum forward speed varies by model (1.6-1.8 m/s versus 1.6 m/s adjustable). Overall dimensions and wheel sizes differ slightly across the three models.

ISO 7176 series standards (ISO 7176-1 through 7176-25, specifically covering stability, performance, safety, braking, climbing, and electrical systems); IEC 60601-1-2 (electromagnetic compatibility); ISO 10993-5, ISO 10993-10, and ISO 10993-23 (biocompatibility); ISO 16840-10; and FDA guidance for Power Wheelchair submissions.

Both devices comply with identical ISO and IEC standards and are classified identically as Class II powered wheelchairs. Performance testing demonstrates substantial equivalence across all critical parameters: static/dynamic stability, brake performance, theoretical distance range, maximum speed, obstacle-climbing ability, and electrical safety. Minor dimensional and specification differences (motor wattage, battery capacity, frame materials for one model, braking distance, incline angle) do not raise new safety or effectiveness concerns because all testing is conducted per ISO 7176 series standards with maximum rated weight dummies, demonstrating the devices perform equivalently under standardized conditions.