Will frequent charging of electric vehicles reduce the efficiency and life of batteries?

Oct 14, 2019   Pageview:38

Smartphones that are used on hand every day have proved that frequent charging does not reduce the efficiency and life of batteries.


NASA has conducted a special study on how to prolong battery life. The results show that the fuller the battery charges, the greater the battery loss. If the power of lithium battery can be kept in the intermediate state, the battery life will be longer. This means that lithium batteries should not be charged to 100% or exhausted. The smaller the interval between charging and discharging, the better.


If the capacity of one cell in the battery pack is lower than that of other cells, after many charges and discharges, the cell will eventually enter a deep discharge state, and even may cause the failure of the whole battery pack. In order to avoid such a situation, mature electric vehicles will be equipped with internal detection devices to monitor the working status of each battery unit; some will also be equipped with discharge devices to balance the charging status of the battery unit.


How long does it take to fill up the battery?


Different models and charging equipments have different charging time.


Usually, if the manufacturer's charging pile or wall box is used, the battery can be fully charged within six to eight hours. But if you use ordinary household power supply, the battery can be filled up for more than ten hours. This is also the main reason that restricts the inter-city travel of electric vehicles.


Does hot weather last longer?


Hot weather may make the redox reaction of batteries more active, but the reduction of vehicle mileage is more likely. In hot weather, most drivers and members will use on-board air conditioning system, which will obviously increase power consumption. In addition, when the vehicle works in high temperature environment, the heat generated by the vehicle-mounted batteries is larger. Coolant circulation is also needed to help the batteries control the working temperature.


Will it soon run out of electricity in cold weather?


Unlike the batteries used in cameras and mobile phones, the batteries equipped with electric vehicles are industrial-grade products, which have been designed and manufactured in harsh climatic environments. When lithium-ion batteries are used at low temperatures, the efficiency of batteries will be significantly reduced, but mature electric vehicle manufacturers have equipped batteries with "air conditioning" - when the weather is cold, drivers can enjoy heating seats and batteries can also enjoy "electric blankets".


Will the battery be stolen after parking?


Unlike gasoline vehicles, the batteries of electric vehicles are mostly fixed on the chassis of vehicles, and professional equipment and tools are needed for disassembly. The battery form of electric vehicle is special, and there is no conventional positive and negative pole head. It is not easy to sell and use after theft, so theft is not interesting.


Can electric vehicles be equipped with external equipment?


Electric cars, of course, can be equipped with external electrical equipment, cigarette lighters, flash memory and SD cards for playing songs, as well as the recently popular traffic safety recorder. However, the electric management of electric vehicles is more stringent than that of gasoline vehicles. When the current of electric equipment exceeds the safety threshold and the residual power of the vehicle is low, the on-board computer will relentlessly cut off the power supply of external equipment.


Will the cable be stolen while charging?


It's a real piecemeal thing. At this stage, most people who buy electric cars will have fixed parking spaces, some of them will have fixed parking spaces in the garage, and only neighbors and staff can approach electric cars. Under such conditions, charging cables are still missing, and perhaps other reasons should be checked.


Which is better, quick charge or quick change?


From the current results, "charging" has obviously won. Most of the electric vehicles released by automobile companies in recent years have adopted charging technology. This seems to imply that "changing electricity" has become a thing of the past.


Several cities, such as Hangzhou, have sold electric vehicles that can replace power batteries, and the advantage of "changing power" has been very obvious. Replacing batteries can dramatically shorten the waiting time for charging --- when the meter shows that the vehicle has insufficient power, it can go directly to the nearby power exchange station; if the vehicle is not many, it can complete the power exchange in three or five minutes, and the electric vehicle can go on the road "full of blood". However, infrastructure construction directly restricts the development of "power exchange" - land resources in large and medium-sized cities are scarce. The construction of large-scale power stations requires not only a lot of land in the central urban area, but also as far away from residential buildings as possible.


Is the battery charging when reversing?


Vehicle movement necessarily requires work. Electric vehicles are still consuming electricity. It seems easier to explain that if you change to a gasoline car, you need the output power of the internal combustion engine whether you are driving forward or backward.


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