There is no doubt that the fast charging mode of electric vehicles is the mainstream of future development, and now share several main technical routes.
1. Technical scheme of electric vehicle voltage platform
1) To increase the charging power, increase the voltage platform or increase the charging current.
2) In terms of technical indicators, the charging voltage platform should reach 1000V-1500V, and the charging current should reach 400A-500A.
3) There are a few domestic companies that can produce high-voltage components with a voltage level of 800V. But the manufacturing process is not perfect and the cost is high.
2. Power battery technical solution
1) Power batteries can achieve a balance between high energy density and fast charging performance.
2) Study the design of positive and negative electrode materials, electrolytes, separators, and pole pieces to improve the reception and transmission capabilities of lithium ions, realize high-rate charging and discharging capabilities of batteries, and correctly identify the "healthy charging range" of batteries at different temperatures and SOCs , to ensure extended life.
3. Technical scheme of charging connection components
1) Redesigning a compatible connector is also a method. The advantage is that it can comprehensively improve the inherent problems of the existing solution, reduce the size, and improve the safety performance; the disadvantage is that it needs to use an adapter to achieve compatibility.
2) Make the design size of the small connector, and consider the combination scheme with the AC interface to improve the mechanical and electrical safety performance.
4. Technical scheme of communication protocol
1) Comparing the three different communication methods of PLC, CAN and Ethernet, continue to use CAN communication mode, and make expansion and modification based on the existing GB/T 27930-2015: improve the communication protocol version information, expand the high-current charging range, Added information exchange of new functions such as temperature monitoring information, discharge function, thermal management function, scheduled charging, plug and charge, etc., clarified the fault level and processing method, and improved and classified the fault information.
2) First, meet the needs of high power; second, increase the need to support low-power charging; third, support two-way interaction of charging and discharging; fourth, increase information security; fifth, plug and charge technical route .
6. Technical scheme of charger
Improve the current carrying capacity of the charging interface, increase the maximum output voltage of the charger, improve the heat dissipation design, and enhance the timeliness of protection.
7. Technical solutions for grid coordination
It is necessary to carry out the interaction between electric vehicles and the power grid, enhance the peak regulation capacity of the power grid system, and integrate energy storage equipment at necessary sites to reduce short-term impact on the power grid.
8. Charging safety technical solutions
1) The BMS of car companies is still the core problem, and it is necessary to increase the temperature monitoring device. Once the temperature is too high, the current must be reduced.
2) The high-power charging process is not always full power to 100%, but more of a fast charge in the previous stage and slow down in the later stage.


To learn more about EV cables and charging pile cables, please visit OMG's official website: https://www.omgevcable.com/