How to build efficient charging accessories for new energy vehicles? To build efficient charging accessories for new energy vehicles, it is necessary to make a comprehensive breakthrough in five dimensions: technology, system, user, standard and industry chain synergy, and the specific strategies are as follows:
1. Increase the research and development of liquid-cooled supercharging and high-power DC fast charging technology. R & D to support 800V high-voltage platform charging module, with silicon carbide power devices, can increase the charging efficiency to more than 95%, to achieve ‘10 minutes of charging, range of 400 kilometres’.
2. Integrate high-precision temperature sensors and liquid-cooled heat dissipation system in the charging gun and charging module. Adopting graphene-based composite phase change material, the temperature rise during charging can be no more than 50℃, which prolongs the life of the equipment.
3. Developing dynamic wireless charging technology, coupling the transmitter coil buried in the road with the vehicle receiving coil to achieve continuous energy replenishment while the vehicle is travelling. Pilot application in bus-only lanes can reduce the cost of construction of charging piles at bus stations.
4. Strictly implement the GB/T 20234 series of national standards to ensure the physical and electrical compatibility of charging guns with different brands. For example, it promotes the ‘plug-and-charge’ technology, which automatically identifies vehicle information through the vehicle-pile communication protocol and reduces manual operation.
5. The charging module adopts standardised power units and supports parallel expansion of multiple modules. The charging pile can be expanded to 360kW at public fast charging stations to meet the demand for large power of heavy trucks and buses.
6. The charging pile is equipped with a large touch screen and voice interaction function, supporting multi-language switching and barrier-free operation. For example, AR navigation function is developed to guide users to quickly locate vacant charging spaces through mobile phone camera.
How to build efficient charging accessories for new energy vehicles? Cooperate with material suppliers (e.g. Alcoa Group, chip manufacturers (BYD Semiconductor) to ensure that key components are independently controlled. Adopt domestic SiC MOSFETs in charging modules to reduce costs.
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