This paper introduces a DC charging pile for new energy electric vehicles. The DC charging pile can expand the charging power through multiple modular charging units in parallel to improve the charging speed. Each charging unit includes Vienna rectifier, DC transformer, and DC converter.
[XIE SHANGGUO/FOR CHINA DAILY] Global interest in homegrown charging piles for new energy vehicles has ballooned as China cements its leading position in the global NEV market with exports set to almost double this year, experts and industry executives said.
Charging piles for new energy vehicles are seen in Shenzhen, South China's Guangdong province. [Photo/VCG] GUANGZHOU -- A whopping 340,000 charging piles for new energy vehicles (NEVs) have been installed in South China's Guangdong province, reflecting the country's commitment to boosting green development.
Simulation waveforms of a new energy electric vehicle charging pile composed of four charging units Figure 8 shows the waveforms of a DC converter composed of three interleaved circuits. The reference current of each circuit is 8.33A, and the reference current of each DC converter is 25A, so the total charging current is 100A.
Compared with the existing mainstream fast charging pile, each supercharging pile can increase the charging efficiency by 350 percent. Flourishing green development Chinese automaker GAC Aion has planned to build 220 charging stations in Guangzhou within 2022 and increase the number to 1,000 by 2025, according to a GAC Aion official.
This DC charging pile and its control technology provide some technical guarantee for the application of new energy electric vehicles. In the future, the DC charging piles with higher power level, high frequency, high efficiency, and high redundancy features will be studied.