Cold weather extends the battery charging time of electric vehicles

According to Battery.com.cn, "The electric car is shown as 'high'. When it rides less than 5 kilometers, it becomes 'medium'?" In the winter, Ms. Yi, who is riding an electric car to work, found that the original The electric car was charged once in three or four days, and now it will be charged once in less than two days, and the distance traveled is also much shorter. On the 14th, the reporter consulted experts learned that the mileage of electric vehicles in winter is shortened to a normal phenomenon. In the environment of lead-acid batteries below 5 °C, there will be an illusion that the display is full of actual but insufficient, and the cruising range is shortened by 20%-30%. normal phenomenon.

Extended charging time in low temperature environment does not work

On the 14th, the reporter went to a number of electric vehicle sales outlets in Tongda Road in the city. The staff inside the store said that after the winter, the phenomenon of insufficient complaints about the shortage of electric vehicles has increased, especially the owners of new electric vehicles.

"At present, most of the electric vehicles sold in the market use lead-acid batteries, and this kind of battery is unstable under low temperature environment." Wang Su, a large-scale electric vehicle sales manager in the city, told reporters that the working status and temperature of lead-acid batteries Close relationship. The research data shows that the most suitable environment for lead-acid batteries is about 25 °C, which can generally reach the maximum cruising range of 40 km for electric vehicles. In the environment of -5 °C to 5 °C, the storage capacity of lead-acid batteries will be lost. 20%-30%. The lower the temperature, the greater the loss; if it is higher than 30 ° C, although the maximum cruising range can be achieved, this temperature is very large for the battery.

In the low temperature environment in winter, can the extended charging time solve the "discount" phenomenon of cruising range? In response to this question, Wang Su said that in the low temperature environment, the active material in the lead-acid battery is shrinking, and even if the charging time is increased, the battery cannot be realized. Effective activation of the active substance.

Long-term fast charging will shorten battery life

Since the shortening of the cruising range of electric vehicles in winter is an inevitable phenomenon, turning to fast charging has become a choice for many citizens. On the 14th, the reporter visited the city's Yinqueshan Road and Yimeng Road, and nearly 10 electric vehicle quick charging stations learned that after the winter, there was an increase in the number of people who came to work in the afternoon and in the evening.

The reporter learned that an electric car without electricity can be fully charged after 30 minutes of rapid charging, while normal charging takes about 10 hours. Does rapid charging have any effect on the battery?

Zheng Shifu, an after-sales maintenance technician at a large electric vehicle store in the city, told reporters that long-term fast charging will shorten battery life. "Fast charging is like eating a big mouth. The rice that was originally eaten in 30 minutes should be eaten in 5 minutes. Whose stomach can withstand it?" Master Zheng introduced that the normal charging electric car has an input voltage of about 50. Volt, and the fast charging input voltage can reach 400 volts, which is 8 times of the normal input voltage. Occasionally, there is no problem when charging quickly, but often fast charging will shorten the service life of ordinary lead-acid batteries.

The reporter learned that the distribution of the fast charging window of electric vehicles in our city is not reasonable, mainly reflected in the surplus of some sections of urban areas and the lack of Beicheng New District.

In the urban area of ​​Yinqueshan Road and Xinhua Road, there are as many as six charging piles within a distance of 500 meters. In the vicinity of the intersection of Yimeng Road and Beiyuan Road, the charging piles are more dense, and some shops even There are 2 new charging piles. In the Beicheng New District, the reporter rode along the distance of about 5 kilometers along the Yimeng North Road and Beijing Road, and only saw two electric vehicles fast charging piles.

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