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release time:2024-03-12 Hits: Popular:AG11 battery
Summer is here, which is another test for pure electric vehicles. Let’s focus on the issue of charging on highways.
Part One DC Charging Network
Problem description: I just charged my electric car on the highway.
1. The maximum temperature reported by BMS reached 55 degrees, and the charging current demand could not increase. It took more than an hour of charging to reach 70% of SOC.
2. Now I am preparing to get on the highway, but I find that the power cannot come up.
Let’s talk about this matter bit by bit, State Grid’s intercity fast charging network strategy
Already realized: "Two vertical, two horizontal and one ring highway intercity fast charging network: Beijing-Shanghai, Beijing-Hong Kong-Macao, Qinghai-Yin, Shanghai-Chengdu and Nanjing-Shanghai-Hangzhou ring lines
Under construction: "Seven vertical, four horizontal and two grid highway fast charging network
1. Shenhai, Beijing-Shanghai, Beijing-Taiwan, Daguang, Beijing-Hong Kong-Macao, Erguang, Baomao Expressway
2. The Four Horizontal Expressways refer to the Qingyin, Lianhuo, Shanghai-Chengdu, and Shanghai-Kunming Expressways
3. The two grids refer to the Beijing-Tianjin-Hebei-Shandong grid and the Yangtze River Delta grid.
Electric vehicles with DC charging capabilities + highway charging network will inevitably increase users' enthusiasm for going to the suburbs to escape the summer heat. If you just try a DC charging station, this story will encounter some problems.
1. DC fast charging itself will cause the temperature of the battery to rise.
2. The problem arises when the external ambient temperature is relatively high and the road is exposed to 45 degrees Celsius or more outside.
3. At present, the promotion is mainly in cities with purchase restrictions such as Shanghai, Beijing and Shenzhen. It is somewhat difficult to extend the use to other places.
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