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Efficient fans and drives for quick-charge stations

Cooling concepts for electromobility

Range and charging times are important parameters for electric vehicles. The storage and use of electrical energy generates heat losses that must be dissipated. This means that the quick-charge station itself, its power electronics, charging cable, and any buffer storage units that may be present need high-performance cooling concepts that can be easily integrated and operate reliably over a long period of time, even under sometimes very harsh ambient conditions.

Efficient heat dissipation
ebm‑papst now offers efficient cooling solutions for all aspects of electromobility, including a variety of compact fans for electronics and switch cabinet cooling as well as powerful drives with integrated K4 control electronics for media-based cooling pumps. These are necessary for supplying the cooling circuits. Thanks to its high power density, the ECI-63.20-K4 internal rotor motor is typically used as a pump drive for charging cable cooling in the level 3 range with charging currents of up to 500 A. With variants in the 180 to 370 W power range, the compact drive covers a wide range of applications. The speed-torque-controlled external rotor motors in the VDC-49.15-K4 series, on the other hand, also allow conclusions to be drawn about pressure and coolant flow. This means additional sensors are not required in the application, which has a positive effect on the system control of the charging station.

Fans for different applications
The interior of a quick-charge station, its power electronics and cooling circuits are usually cooled with air. Depending on requirements, the fans in the AxiEco and AxiForce series, for example, can be used for this purpose. The AxiEco offers impressive performance and efficiency in a compact installation space, enabling the design engineer to optimize the design of the application. With a diameter of 200 mm, this fan delivers an air flow of 1,820 m³/h. The speed can be adjusted to the required cooling capacity using a PWM or analog signal. This also allows the operating noise to be reduced to a minimum. AxiForce compact fans are well suited for applications with high back pressure. In sizes 80, 120 and 172 mm, they achieve pressures of up to 1,200 Pa and air flow rates of up to 650 m³/h. These fans have a steep air performance curve such as is required for cooling in densely packed quick-charge stations. There is also a particularly environment-resistant version with encapsulated electronics in protection class IP68, which is dustproof, protected against powerful water jets, and has successfully passed the salt spray test. As an option, these are available with ATEX certification in accordance with DIN EN 60079-7, Group IIC, T4. These features make the AxiForce series ideally suited for use in charging infrastructure, as well as in battery storage systems and switch cabinet cooling.



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