When choosing an electric vehicle charger, the reasonable selection of its power needs to comprehensively consider factors such as battery capacity, charging requirements, safety, portability and the specifications of the charging cable. The following is a specific analysis:
The relationship between battery capacity and charging power: The battery capacity of small and medium-sized electric vehicles is approximately 18 kilowatt-hours. If it is desired to be fully charged within 6 hours, the charger power needs to be about 3 kilowatts. However, this is a reference value. The current will change during actual charging. Generally speaking, the larger the battery capacity, the higher the charging power required.
Types and power levels of charging piles: The power of household AC chargers is usually between 3.3kW and 7.2kW, suitable for daily commuting and urban driving. The power of commercial AC chargers can reach 7.2kW to 22kW. The power of a DC charger can exceed 50kW, and even reach 100kW, 150kW, 200kW, etc., making it suitable for charging during long-distance travel.
Charging requirements: If used for daily commuting, a lower-power charger may be sufficient. If you often travel long distances, it is recommended to choose a charger with higher power to shorten the charging time.
Safety: The charger should be equipped with functions such as overvoltage, overcurrent and overheating protection to safeguard the car battery from damage.
Portability and durability: A charger that is small in size, light in weight, easy to carry and reliable in quality is the top choice.
Charging cable selection: The power of the household slow charging charger equipped with the vehicle is usually between 3.5kW and 1.6kW. According to the national standard, a 2.5-square-millimeter copper core wire is generally sufficient. If the charging distance is long, a 4-square-millimeter wire can be used.
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