Cctv.com feature (reporter Ma Xu Xu Hui Li Di) the city electric bicycle as a means of transport, because of its flexibility, strong market. But what if the electric car on the road suddenly fails? Some businesses from here to see business opportunities, launched a "one yuan charge 10 minutes" mobile fast charging station, popular with the public.
However, users questioned the rapid charging method, high voltage, current assembly damage battery, resulting in late battery storage. So, is it true that "electric cars charge batteries quickly?"
Friends Tucao: occasionally one or two times should be no problem
In the fast charging station for the public to provide fast charging, there are some people questioned their safety.
Reporters in Shijiazhuang, Hangzhou, Ningbo and other cities visited found that with the urban road traffic congestion is becoming more and more serious, flexible and convenient electric bicycles have become the preferred choice of mass consumers. However, electric bicycles rely on batteries to provide power, and walking distance is limited, so many "electric cars, fast charging stations" all over the streets of urban areas. Reporters observed that many "electric cars, fast charging station" shop management is very simple, and even some street kiosks and small shops have joined them, happy to increase revenue.
However, in the fast charging station of the electric vehicle for the public to provide quick charge, there are some people questioned its safety.
Netizen "life helpless", said: "my two wheeled electric vehicle, with two fast charger, storage power immediately obviously not as good as before, and now run only half of the road.". Is it the problem of fast charger charging? Can the battery be repaired?"
In this regard, the netizen "overlooking the earth" answer: "not to cannot but do not go to that street fast charge, because it hurt the battery, you may have a momentary pleasure, 10 times 20 times and you find that your battery is not good, the capacity is greatly reduced, greatly shorten the distance of the ride, a lead-acid battery also have hundreds of them."
The net friend explained, saying: "in fact, the principle is very simple, because it is fast charge, the voltage is too high, inevitably produce bad chemical changes.". Originally, the battery charge is a chemical process, to produce heat, battery liquid, positive and negative will produce some changes, and now artificially accelerated the process, the consequences can be imagined."
Users have expressed their approval, saying that as far as possible not to fast charging, the key time can be charged one or two times.
Electric car business: emergency charging should not become the norm
The relevant personnel of tin energy battery group Co., Ltd., they have used a new set of batteries have done experiments, many times after the use of fast charger, the battery can not start, can not charge the use of the situation.
Roadside fast charger is an emergency convenience project, one yuan charged ten minutes, if the battery is good, you can exercise 3 - 5 kilometers, to solve the battery after no electric cart. Fast charger is able to charge quickly because its current is more than twice the current of the charger." Hangzhou Kang battery repair Instrument Co., Ltd. sales leader Wang Yanhua said.
For users to reflect the use of fast charger after charging the battery burning problem, Wang Yanhua said, people with matching charger charging will appear battery hot situation. Fast charging is an emergency facility that occasionally does not cause damage to the battery.
Chinese Chaowei Power Co. Ltd, day related personnel battery group Co., said in an interview with reporters, a normal battery voltage and the battery charger matching, a smaller current than current fast charger. So it takes hours to match the charger to the battery, and the time required for the fast charger is much shorter.
The relevant personnel of tin energy battery group Co., Ltd., they have used a new set of batteries have done experiments, many times after the use of fast charger, the battery can not start, can not charge the use of the situation. "Fast charger will cause some harm to the battery. It is recommended that users avoid using it as much as possible."."
Expert: fast charge really hurt the battery
At present, batteries for electric bicycles in China are usually lead-acid batteries, but most of the fast chargers in the market use high voltage and large current pulse charging. When charging high current, it will speed up the polarization of battery plate and reduce battery life.
Huang Daiyu, Ph.D., an associate professor of engineering at Xinjiang University, says fast charging is very harmful to batteries. At present, batteries for electric bicycles in China are usually lead-acid batteries, but most of the fast chargers in the market use high voltage and large current pulse charging. When charging high current, it will speed up the polarization of battery plate and reduce battery life."
Huang Daiyu told reporters that the charging process is to lead the role of lead sulfate and water, the formation of lead oxide and sulfuric acid process, simultaneous water electrolysis, hydrogen and oxygen generation of two-way chemical process. Fast charging battery will be desiccated, and produces a large amount of heat, generating large amounts of hydrogen and oxygen, the internal pressure is high, easy to make the battery shell soft plastic. Often fast charging, or the use of substandard, aging charger, easy to make the battery drum, deformation, affecting the performance of the battery, or even scrapped.
Thus, the "electric car charging battery fast" argument is true. Although technicians have spent a lot of effort making effective improvements, electric vehicles using lead-acid batteries are still unable to avoid battery life while charging quickly. In order not to hurt the battery, the experts suggest that consumers charge according to manufacturers instructions, it is best to plan ahead, reducing the frequency of emergency charging on the way.