Battery capacity and loss

APR 15, 2019   Pageview:51

Polaris Smart Grid Online News: Smartphones that are used at hand every day have proven that frequent charging does not reduce battery efficiency and longevity.


NASA has conducted special research on how to extend battery life. The results of the study show that the more fully charged the battery, the greater the loss. If the lithium battery power is kept in the middle, the battery life will be longer. This means that you should not charge the lithium battery to 100%, and do not exhaust the lithium battery. The smaller the interval between charging and discharging, the better is.


If the capacity of one of the battery cells in the battery pack is lower than other cells, after multiple times of charging and discharging, the battery cell will eventually enter a deep discharge state, and may even cause the entire battery pack to malfunction. In order to avoid such a situation, a mature electric vehicle will be equipped with a detection device to monitor the working state of each battery unit; some will also set a discharge device to balance the state of charge of the battery unit.


How long does it take to fill the battery?


Different models, different charging equipment, and the time to fully charge the battery vary greatly.


Normally, if you use the charging pile or charging wall box specified by the manufacturer, you can fully charge the battery within six to eight hours. However, if you use ordinary household power, the battery can last up to ten hours. This is also the main reason for restricting electric vehicles for intercity travel.


Is the cruising range longer in hot weather?


Hot weather may make the battery's redox reaction more active, but the possibility of reducing the cruising range of the vehicle is greater, in hot weather, most drivers and members use car air conditioning systems, which obviously increases power consumption. In addition, when the vehicle is working in a high temperature environment, the amount of heat generated by the vehicle battery is large, and the coolant circulation is also required to help the battery control the operating temperature.


Will it lose power soon in cold weather?


Unlike batteries used in cameras and mobile phones, electric vehicles are equipped with industrial-grade products that have been designed and manufactured to take into account the performance in harsh climates. Lithium-ion batteries are used at low temperatures, and the efficiency of the battery will be significantly reduced, but mature electric vehicle manufacturers have equipped the battery with "air conditioning" - when the weather is cold, the driver can enjoy the heated seat, and the battery can also enjoy the "electric blanket." ".


Will the battery be stolen after parking?


Unlike gasoline vehicles, the batteries of electric vehicles are often fixed to the chassis part of the vehicle. Professional equipment and tools are required for disassembly. The battery type of the electric car is special, and there is no conventional positive and negative pile head. After the theft, it is not easy to sell, and there is no door to use. It is also boring.


Can an electric car be equipped with an external device?


Electric vehicles can of course be connected to external electrical equipment, cigarette lighters that are carried with the car, flash memory and SD cards that play songs, and the recently popular driving safety recorder. However the power management of electric vehicles is stricter than that of gasoline vehicles. When the current of the electric equipment exceeds the safety threshold and the remaining power of the vehicle itself is low, the on-board computer will cut off the power supply of the external equipment without mercy.


Will the cable be stolen while charging?


This is really a matter of spelling people. At this stage, people who buy electric cars will have fixed parking spaces some of them will also have fixed parking spaces in the basement and neighbors and staff can access the electric cars. Under such conditions, the charging cable is still missing, perhaps checking for other reasons.


Which is better for fast charge and quick change?


From the current results, "charging" has clearly won. Most electric vehicles in recent years have adopted charging technology for electric vehicles. This seems to imply that "changing electricity" has become a past tense.


In several cities such as Hangzhou, electric vehicles that can replace power batteries have been sold. The advantage of “changing electricity” has been very obvious. Replacing the battery can greatly shorten the waiting time for charging. When the meter shows that the vehicle is low, it can be directly driven to a nearby power station. If there are not many vehicles, the power can be changed in three or five minutes, and the electric vehicle can be "full of blood" on the road. However, infrastructure construction directly restricts the development of “changing electricity” – land resources in large and medium-sized cities are scarce. Building a large-scale power station requires not only multiple sites in the central city, but also as far away as possible from residential areas.


Is the battery charging when reversing?


Vehicle movement necessarily requires work, and electric vehicles are still consuming electricity. If it is replaced by a gasoline car, it seems easier to explain that the engine needs to be powered regardless of whether it is driving forward or backward.

The page contains the contents of the machine translation.