What parameters should I pay attention to when purchasing charging cable accessories for new energy vehicles? The purchase of charging cable accessories for new energy vehicles should be centred on the three core areas of safety, compatibility and durability, and the following systematic guide is provided in terms of technical parameters, certification standards and other dimensions, to help users avoid the pitfalls of the purchase.
1. Current carrying capacity
Directly affect the charging speed, need to match the charging pile / vehicle charging interface of the maximum current value. 7kW AC charging pile need to choose ≥ 32A cable, 11kW need to be ≥ 50A, it is recommended to choose the rated current 1.5 times more than the cable, such as the vehicle to support the charging of 32A, give priority to the 50A cable to cope with instantaneous current fluctuations.
2. Voltage level and insulation performance
The maximum voltage of the charging system must be ≥, the national standard charging pile is mostly 250V/450V/750V. DC fast charging needs to choose 750V cable; domestic AC pile (220V) can choose 450V. An inferior cable insulation resistance of only 8MΩ, leakage current of 12mA in wet environment, there is a risk of electric shock. 3.
3. Conductor material and cross-sectional area
Conductivity 58m/Ω-mm², such as 6mm² copper wire resistance ≈ 0.57Ω/km. conductivity 35m/Ω-mm² (temporary use only), the same cross-sectional area resistance is 65% higher than the copper core.
What parameters should I pay attention to when purchasing charging cable accessories for new energy vehicles? Priority should be given to charging cables co-branded with the vehicle brand (e.g. Tesla’s original cables are the best fit), or purchased through the official mall of the vehicle manufacturer, to avoid a 20% drop in charging efficiency or even damage to the vehicle’s BMS system due to incompatible accessories.
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