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At 11 °C outdoor, the EV160 increased its power by 7% after 30 minutes of charging, reaching 71%, which is not much different from the EV200.
Nowadays, due to the existence of some advantageous factors such as policies and prices, new energy vehicles have become more and more popular among the public. But as winter approaches, the average temperature and the temperature difference between morning and evening have changed dramatically. So, under low temperature conditions, will new energy vehicles with electric energy as the power source be affected in terms of battery charging?
To this end, the reporter conducted a number of experiments a few days ago, for different battery materials, different temperatures, different car conditions, the effect of charging new energy vehicles in winter. It is found that the current winter temperature in Beijing has no significant impact on the charging of electric vehicles.
According to experts, only low temperatures below -5 °C will affect the charging of electric vehicles. The reporter found that the average temperature in Beijing during the winter is only below -5 °C in the "several cold days" in January, so electric vehicle owners do not have to worry about the charging of electric vehicles in winter.
After the direct allocation of Beijing's new energy vehicle indicators on October 26, it triggered a blowout of new energy vehicle sales. The joint electric vehicle supermarket and various manufacturers' 4S stores sold new energy vehicles in dozens or even hundreds of units a day. In the winter when the weather is getting colder, the sales of new energy vehicles are hot.
But the colder and colder temperatures can't help the owners who want to buy new energy vehicles: know that battery work and mechanical motion will lose more energy under low temperature conditions, will it affect the charging efficiency of new energy vehicles? ?
"The battery of the mobile phone and camera is very hard to charge when the temperature is low. If the electric car battery is not charged in the winter, how can it be opened?" The owner complained.
·experiment·
Charge the battery in three cases
In response to the concerns of car owners about the charging of electric vehicles in winter in Beijing, the reporter conducted several experiments to compare the different materials, the different temperatures of the same battery, and the different conditions of the same battery.
In addition, Beiqi New Energy professionals were invited to interpret and advise on the issue of charging electric vehicles in winter.
1 question: Is the lithium iron phosphate battery charging slowly in winter?
Conclusion: Non-extreme low temperature is not much different
In cooperation with the joint electric car supermarket, the reporter used Beiqi EV160 and EV200 to test. According to the joint electric staff, the EV160 is equipped with ATL Pride brand lithium iron phosphate battery, and the EV200 is equipped with SK brand ternary lithium battery.
At an outdoor temperature of 11 ° C, the two new energy vehicles are simultaneously charged in a slow charge mode.
After 30 minutes, the reporter found that the power of the EV160 increased by 7%, and the power of the EV200 increased by 3%.
The joint electric staff told reporters that the battery capacity of the EV160 is 25.6 kW·h, and the battery capacity of the EV200 is slightly larger than the former, which is 30.4 kW·h.
Due to the different capacities of the two batteries, it can be found that after the digital conversion of the percentage, the EV200 of the ternary lithium battery obtains 0.7 kW less than the EV160 of the lithium iron phosphate battery after 30 minutes of slow charging under the same weather conditions. When, the difference is not big.
Expert: Lithium iron phosphate battery -5 °C or more direct charging no problem
Beiqi New Energy's professionals introduced that at present, Beiqi New Energy mainly uses two kinds of batteries, namely lithium iron phosphate battery and ternary lithium battery. The advantages of ternary lithium battery in low temperature performance and cruising range are significantly greater than lithium iron phosphate batteries.
Previously, only a few foreign electric vehicle manufacturers such as Tesla used ternary lithium batteries. But since last year, Beiqi EV200 has also begun to use ternary lithium batteries.
Beiqi New Energy's low-temperature use requirements for the North, through the use of custom-developed low-temperature improved batteries, the power battery system can achieve -20 °C direct charging, which greatly shortens the winter charging time. The general car battery will stop working because it can not be charged, and the ternary lithium battery of Beiqi New Energy can be used normally.
The fatal shortcoming of lithium iron phosphate battery is poor low temperature performance. Lithium iron phosphate battery is generally only allowed to charge directly above -5 °C in winter. As long as it is higher than this temperature, lithium iron phosphate battery will not be affected too much.