High-voltage Brushless Electronic Cooling Water Pump 450-750V for New Energy Coach

Working principle of 450-750V high voltage electronic cooling water pump
Power Supply: Powered by the high-voltage battery (DC 450V-750V) of the new energy bus, the low-voltage 24V system is responsible for control and communication, ensuring stable power supply and safe operation.
Motor Drive: Equipped with a built-in permanent magnet synchronous brushless motor (efficiency ≥ 90%) to drive the impeller to rotate, it has no mechanical brushes, no wear, and a long lifespan, making it more energy-efficient than traditional motors.
Full Shielding Isolation: The stator (high voltage side) and rotor (medium side) are completely shielded and isolated, and the high voltage electricity does not come into contact with the coolant, preventing leakage and high voltage breakdown, ensuring safe and reliable operation.
Flow Control: Through CAN 2.0 communication (SAE J1939) and PWM stepless speed regulation, the flow can be accurately adjusted according to the cooling requirements of HVCH, battery, and motor, with a flow accuracy of ± 2%.
Protection Mechanism: Built in multiple protections such as overvoltage, undervoltage, overcurrent, overtemperature, dry running, and stall, automatically reducing power or shutting down in case of faults, suitable for harsh on-board environments.

Core Advantages
Wide Voltage Adaptation: 450V-750V full voltage range is compatible, perfectly matching the high-voltage platform of all new energy buses, with strong versatility and adaptability to 400V/800V models.
High Efficiency and Energy Saving: Equipped with brushless permanent magnet synchronous motor with efficiency ≥ 85%, which is about 20% more energy-saving than low-voltage water pumps, reducing the energy consumption of the whole vehicle and improving the driving range.
Safe and Reliable: Full shielding and high-voltage isolation design, with HVIL high-voltage interlock, no leakage risk; IP67 protection level, shockproof and corrosion-resistant, adapting to the complex road conditions of buses.
Intelligent Control: CAN 2.0 communication + PWM stepless speed regulation, the flow rate can be adjusted on demand, and the battery temperature difference can be controlled within ±2℃, optimizing the efficiency of thermal management.
Large Flow and High Head: 150-300 L/min flow rate and 15-25m head can meet the circulation needs of multi-circuits such as HVCH, battery and motor.
Long Service Life and Low Maintenance: Brushless design, no mechanical wear, service life ≥ 10,000 hours, reducing the operation and maintenance cost of buses.
Application Scenarios
New energy urban public transport buses (main application scenario)
Electric tourist coaches and passenger buses
Hybrid and extended-range buses
Special buses in alpine regions (dual water pumps for low-temperature adaptation)
Fuel cell buses (coolant circulation for fuel cell stacks)