How to solve the anxiety of low temperature performance of power battery for ele
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2020/12/11 10:01:00
Often to the winter, especially in the north of the winter, electric vehicle power battery poor low temperature performance will become the owners of the heart, and some car friends joked that they bought an "electric father."
In winter, the battery of an electric car needs to be heated to its normal state to start, such as low-temperature heating, warm air, seat heating, and APP opening...Every operation is consuming power.According to industry insiders, private electric cars may have a charge of 60 degrees, but various "necessary" functions such as low temperature battery heating and warm air can take away more than 10 degrees. It is not surprising that electric cars have become a love-hate existence in the cold winter.
In addition, due to the low external temperature in winter, some types of batteries in the operation process are still faced with problems such as more power attenuation at low temperature, and the more serious case may be the direct "strike" of vehicles.According to industry insiders, in some northern cities, bus batteries often freeze after a night of heavy snow, requiring staff to carry out maintenance to recharge them normally.
Obviously, the low temperature performance of electric vehicle power battery is still a major concern for consumers to use and buy electric vehicles in winter.
Analysis according to the personage inside course of study, the electric vehicle power battery in winter low temperature performance is poor have multiple reasons, such as heating before starting the vehicle need to battery, make its temperature rise to normal, and the electricity from the battery pack itself, at the same time the winter inside to open the seat heating hot air conditioning, as all sorts of application functions of opening and use of electricity, resulting in a decline in power.
Winter is an even greater challenge for bus operators.Due to the general power battery in low temperature power attenuation faster, the need for frequent charging, making the operation cost increased.In addition to the battery drain, another pain point is the colder winters, which make charging more difficult.There is a bus driver ridicule, in the northern winter, fast charge slow charge, slow charge super slow charge.
According to battery China, for the winter battery power attenuation pain point, battery companies and car companies are trying to solve this pain point.For example, some domestic battery enterprises have developed "self-heating technology of the cell". By using THE BMS control algorithm and the whole vehicle powertrain structure, the cell can be controlled to charge and discharge rapidly within a short time, so that the cell heats up from the inside and the self-heating effect of the cell can be realized.
Of course, not all batteries suffer from the pain of fading and slow charging during extreme cold or cold winters.At present, lithium yinlong titanate battery has obvious advantages in temperature resistance and wide performance, and the power attenuation can be almost ignored in extremely cold conditions.According to insiders, lithium titanate has a stable structure, and its spinel structure has a THREE-DIMENSIONAL lithium ion diffusion channel. In low temperature, various dynamic properties can still be kept at room temperature. "It can be charged and discharged normally at minus 50 to above 60, ensuring the normal operation of vehicles at low temperature."
In fact, considering the good wide temperature resistance performance of lithium titanate battery, it can be normally charged and discharged in extremely cold and plateau areas without attenuation. At present, many areas in the north of China will take Lithium titanate battery models as the first choice when promoting bus switching to electric vehicles.According to battery China, the new energy buses in Harbin, Jinzhou, Baotou and other northern cities mainly use lithium titanate battery technology route, and the buses mainly come from Yinlong new energy.
In 2017, Yinlong pure electric bus with lithium titanate battery was officially put into operation in Harbin.The seasonal temperature difference in Harbin is large, reaching more than 30 in summer and dropping to minus 30 in winter. "But the Yinlong car has withstood the test without any problems in three winters.Yinlong is a pure electric vehicle with very good battery performance."Harbin Futong Bus passenger Transport Co., LTD., said the bus driver station.
"Buses with conventional batteries have to be heated before they can start charging.It is very troublesome and often affects the normal morning commute time.""The Yinlong bus is much simpler," said Zhai. "The lithium titanate battery has better activity and we don't need to handle normal charging and discharging. It's much more convenient than buses that use traditional batteries."
It is worth mentioning that in Beijing, lithium titanate battery also plays an important role in the public transportation system.In addition to the low winter temperature in Beijing, lithium titanate battery has almost no attenuation and normal charging and discharging at low temperature, and its excellent fast charging performance at low temperature is also an important reason for Beijing's urban public transportation system to favor it.
Recently, according to the CCTV Financial Channel reported, "Lithium titanate battery has a comfortable environment applicable temperature, in the laboratory, the reporter saw that the simulation experiment of the lowest temperature is -50, the highest temperature reached 60...""A bus carrying Yinlong New Energy Lithium titanate battery can be fully charged in just eight minutes."City bus passenger and vehicle belongs to vehicles such as operations, scenic spots for efficiency of vehicle charging can fill the demand is higher, and silver long lithium titanate battery quick charge performance is good, can also be the normal charge and discharge at low temperatures, there is no other battery under low temperature "fast charger slow charger" pain points, it should also be silver long lithium titanate battery in the field of more and more, especially the city bus passenger cars accounted for in one of the reasons for the increasing trend.
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