I recently learned on various complaint websites that almost 40% of new energy EV owners know that their actual battery life is very different from official mileage, which is official data. traceable, because official data will turn off air conditioning, headlights, heated seats and other loads during test, so data obtained from here is closer to upper limit of maximum range. data is mainly for reference.
Despite fact that country's current electric vehicle charging piles are constantly being built, this is undoubtedly a drop in ocean for rapid development of domestic market for new energy vehicles. concern of most car owners. Today I will introduce you to several ways.
Second, get into a quasi-charging rhythm
At present, pure electric vehicles use lead acid batteries, lithium iron manganese phosphate batteries, lithium iron phosphate batteries, and lithium cobalt oxide batteries, each with its own advantages and disadvantages regarding service life and battery life. Taking commonly used lithium iron phosphate battery as an example, if battery is not mistreated, it can usually be fully charged and discharged more than 2000 times. Therefore, car owners should refer to normal frequency of use and mileage according to actual situation.Based on understanding charging time and frequency, following points should also be paid attention to:
Firstly, while driving, power meter will turn on a yellow or red light to indicate that it is time to charge; if only red indicator is on, you should stop using it and charge it as soon as possible, otherwise battery life will be greatly reduced if it is over-discharged;
Second, when driving time is short and only part of power is displayed, if owner chooses to charge, time should not be too long, otherwise it will overcharge and overheat battery.
According to characteristics of battery pack, overcharging, over-discharging and under-charging will shorten life of battery, so "shallow charging and shallow discharging" should be performed under normal use. It should be reminded that DC high-voltage fast charging should only be used as an additional charge, as much as possible. Use fast charging more than 2 times in a row. Use performance. Typically, average battery charging time is about 10 hours. If battery temperature exceeds 65 degrees Celsius during charging, stop charging.
Second, increase number of batteries
The conversion of old platform (AEP: adapted electric platform) is divided into two types: old design based on old platform and new design based on old platform. Spark EV belongs to first type and uses Gamma II platform, and Chevrolet Bolt belongs to second type and is developed on basis of Gamma G2SC platform. Please note that with naked eye, battery structure has become flatter, battery capacity has also increased, and more batteries can be installed. That's right, Chevrolet Bolt [tyncar.com/X/xuefulan-Bolt-EV/] increased the number of cells to 288, still 96 groups, but increased to 3 cells per group.
The cells are supplied by LG Chem, 55Ah each, 3.75V. The battery capacity is almost 60kWh (actually 288 x 55Ah x 3.75V = 59.4kWh).
Battery capacity is 285L, total weight is 435kg, battery system energy density is 246Wh/L and 137Wh/kg, EPA range is 383km. It can be seen that from Spark EV to Bolt, cell count has doubled, battery volume has increased by 0.7 times, battery weight has doubled, energy density of battery system has also doubled, and range of car has tripled.
Third, don't park for too long when battery is low
If battery is not charged in time after use, it will be in a power loss state. During this time, battery is prone to sulfation during storage. The longer car is idle in a discharged state, more damage will be to battery. It is recommended to charge battery once a month when not in use to keep battery in good condition.
Fourth, avoid aggressive driving
There was a Mr. Jiang who drove a pure electric car (official mileage 300 kilometers) from Haidian District in Beijing, without recharging, he arrived safely in Xingcheng City, Liaoning Province (total 467 kilometers). After arriving at destination, device shows that remaining power can still travel 7 kilometers. In fact, there is a similarity between energy saving and fuel economy: if you drive sharply, it will cause a strong current to be instantly discharged, which will easily form lead sulfate crystals, which can damage physical properties of battery plate.
Five, park in shade
When temperature is high, internal pressure of battery will increase, resulting in loss of water from battery, lower battery activity and accelerate aging of plate, so it is best to find a cool place to park.
Currently, there are no major innovations in technology, it is very important to master these points, behavioral habits and driving style are especially important. It can also improve safety in daily driving.