Structure and Performance Parameters of Battery Equipment Fans
Battery equipment fans primarily consist of an impeller, housing, inlet, shock absorber, and drive unit.
Impeller: Composed of blades mounted on the front plate, rear plate, and between the two plates.
Housing: The fan housing is vortex-shaped, fabricated from thin steel plates by welding. Its function is to collect gas from the impeller, smoothly guide it along the impeller's rotational direction toward the fan outlet, and pressurize the gas.
Flow Rate Q: The volume of fluid supplied by the battery equipment fan per unit time, typically expressed as volumetric flow rate in m³/s or m³/h. It depends on the fan's structure, dimensions, and rotational speed.
Head p: The effective energy provided by the fan per unit volumetric flow rate, measured in Pa. Efficiency η: During actual operation, due to various energy losses, the fan's actual (effective) pressure head and flow rate fall below theoretical values, while input power exceeds theoretical values.
The parameter reflecting energy losses is termed efficiency. Efficiency relates to fan type, size, manufacturing precision, gas flow rate, and performance characteristics.
Typically, battery equipment fans achieve 50–70% efficiency, while specialized models can reach 90%. Shaft power n and net energy Ne: The power input to the fan shaft from the motor is measured in W or kW.
The effective power of battery equipment fans is the energy per unit time extracted from the gas by the propeller: Ne = Qp. Thus, N = Ne/η = Qp/η. Speed n: The rotational speed of the fan and fan impeller is measured in revolutions per minute (r/min).
