into the winter, many places have entered northern minus, of course, will talk about an old topic, it is a pure electric vehicle battery life deteriorates. I believe these days we have also seen the hot news about Aion S, many vehicle owners to reflect life labeled as 500km, but winter can only go 200km, more than half the mileage impairment, which the consumer can not accept. So there users a message to ask, why a pure electric car winter life would not it? So come to you today to science this issue.
If in the north, we should have experienced, if the long winter the phone out in a cold environment, it will directly be “cold shutdown” even if there are a lot of electricity. And then the phone into a warm place, you can switch it on again and restore power unchanged.
In fact, most of the electric cars and mobile phones, are used in lithium batteries, and lithium primary discharge achieved by chemical reaction, temperature is the chemical reaction of one of the important factors. The bipolar battery is to rely on the conductive electrolytic solution, if the temperature is too low, fluidity of the electrolyte solution is deteriorated, resulting in smaller and smaller current, either directly solidified electrolytic solution to stop the reaction, either the current is insufficient to support electricity generation.
to answer simple point, then, is a low temperature close to the freezing point of the electrolyte solution, we will more and more viscous until coagulation, and the lithium ions in the electrolyte can not swim in the ability to produce electricity declined.
If a lithium battery, then you will face this problem, inevitably, many pure electric manufacturers began to come up with a variety of coping strategies, such as we often see the battery liquid temperature control system, equal to the battery put on a dress, and to ensure cool, can cool the battery, the battery but also quickly reach operating temperature.
Of course, like Aion S is actually equipped with a smart temperature control system, but also sacrificed life seriously, why? This issue involves the impact of the second winter of life, air conditioning.
fuel vehiclesAir conditioning heating principle is simple, direct by the temperature of the engine can provide warm air, cold air compared to more energy efficient. But just pure electric vehicles and fuel vehicle contrary, heating warm air to test the resistance wire is achieved by large power consumption, but also than the compressor power consumption, it is open in winter, too warm to make life impairment . As well as the owners say, I closed the air conditioning, the same can only run 200 kilometers, which is not still a problem battery do?
This is to influence the third condition of life, its own battery management capabilities, currently most of the pure electric car at the time of publicity, etc. will still use 60 speed endurance to calibrate the publicity, but we have actually tested by a variety of electric vehicles, in fact 60 per hour is indeed the most energy efficient, theoretical terms, conditions can be considered real life endurance.
In many manufacturers have begun to do the standard cell 60 constant, so that in the case of non-constant speed of 60 prone to severe impairment of life, for example, to many owners are pieces of Aion S owners, complicated road every day, so if the battery management is not balanced, there will be a difference of many circumstances and calibration of the mileage.
summary
At present pure electric vehicles in cold cases, most will encounter mileage impairment, which is a common problem, yet rarely be done in terms of constant natural temperature affect battery, of course, from an objective point of view, does not recommend consumers to buy cold regions of northern pure electric vehicles, because in addition to significantly reducing mileage, as well as charging slow characteristics, all of efficiency will be reduced, compared to the terms of, or fuel vehicles more reliable.