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With Advanced Battery Technology, Winter Is No Worry.

Mar 10, 2018

With the nationwide cooling of the snow and rain, the freezing mode was immediately opened in the winter of 2018. The cold weather not only makes people shiver, it even makes many new energy cars "timid". In recent days some new energy owners have complained on the web, raising concerns about new energy vehicles "strike on the Winter", "a sudden reduction in mileage", "inability to charge or charge hard", and so on.

With advanced battery technology, winter is no worry.

Ambient temperature has varying degrees of influence on the efficiency of all automobiles. For the pure electric vehicle, in the low temperature condition, the electrolyte viscosity of the battery will be higher, and then produce the problem such as the battery internal resistance rises, the lithium ion diffusion speed slows down, finally causes the battery discharge power to descend. On this issue, even the nearly million-priced Tesla has not been spared.

Although the discharge power reduction is undeniable fact, but the type of power battery, in the face of low temperature performance is still different. Generally speaking, lithium iron phosphate battery in the face of low temperature attenuation is more obvious, 0 ℃ capacity will be reduced by about 10%, and-20 degree capacity will be reduced by about 45%. Compared with the ternary lithium battery (representative of the model Tesla, Chery new energy, etc.), low-temperature discharge performance is significantly better, in Beijing, as the main market for electric vehicles, the highest temperature in summer in Beijing around 40 ℃, while the winter is basically maintained in the 15 ℃. This temperature range is obviously suitable for the lithium-ion battery with better low-temperature performance. The high temperature resistance of lithium iron phosphate batteries in Beijing will appear a little weak in winter.

With advanced battery technology, winter is no worry.

Is the charge time getting longer? is actually increasing the battery warm-up time

In winter, when the battery core is lower than 0 degrees Celsius, the system will first heat the battery, which is what we call the battery heat management technology, when its temperature reached more than 5 degrees, will start charging vehicles. So instead of the charge slowing down, it adds a time to preheat the battery before charging it. So at a certain level, the pure electric vehicle in the "cool car" state charging when the charge is difficult, full of electricity time is too long, in fact, is also a self-protection mechanism of the battery, not pure electric vehicle itself quality problems.

In general, the winter use of cars as far as possible to adopt the principle of "with charge", that is, the vehicle immediately after the use of charging, because at this time the battery temperature is relatively high, can improve the charging efficiency, in addition, in the case of conditions, it is also best to choose some of the higher temperatures, such as underground car parks, closed garage charging.

Choose a good car with advanced battery thermal management system

In view of the impact of winter cold on the battery, the vast number of consumers in the purchase of new energy vehicles, must be dry. In addition to the type of battery to understand, have a good battery thermal management system, for a pure electric car is also critical. And throughout the new energy market, in recent years, the outstanding performance of Chery New energy, in this regard is particularly commendable. Chery New Energy whole series of models are using a high energy density of ternary lithium batteries, advanced battery thermal management system, can ensure that the battery in the -15°c to 50°c environment can be normal operation and charging, and at low temperature conditions with battery heating, low-temperature fast charging, low-temperature slow charge functions. This is certainly a strong attraction for new energy owners in the north.