THERMAL MANAGEMENT SOLUTION FOR ELECTRIC EXCAVATOR
HVAC System / Electrical
Bergstrom has successfully developed the next generation of integrated thermal management system for electric excavators.
Not only will the system address the thermal control in the cab, but also it will achieve more precise temperature management for the 3E Systems (Electric Battery, Electric Motor and Electric Control).
In this system, Bergstrom has successfully developed a secondary heat exchange system (intermediate cooling system) that achieves secondary heat exchange between water and refrigerant, as well as refrigerant and the environment.
The system has achieved breakthroughs in:
- Recovery of waste heat from batteries and electric propulsion systems.
- Wider range of control targets.
- High-efficiency low-temperature heat pump technology
- Modularized cooling system and components, leading to improved temperature control accuracy.
- Automatic switching of operating modes under different conditions, facilitating multi-object thermal management control.
| Installation | Under the bench | |
| Characters | Full-automatic | |
| Rated Voltage | 618 V | |
| Refrigerant | R134a | |
| Communication | CAN | |
| Cooling Performance | Dry/Wet bulb temp. | 27 °C / 19.5 °C |
| Ambient temp. | 35 °C | |
| HVAC mode | Max cooling, Face/Rear, Recirculation | |
| Airflow rate (zero static pressure) | 600 m³/h | |
| Cooling capacity | 5.5 kW | |
| COP | 2.3 W/W | |
| Heating Performance | Ambient temp. | 20 °C |
| Heating capacity | 5.8 kW | |
| BMS Performance | Ambient temp. | 35 °C |
| Coolant | 50% Glycol, 50% water | |
| Water Flow Rate | 30 (L/min) | |
| Cooling capacity | 8.8 kW | |
