The invention provides a method and a device for estimating the driving range of an electric vehicle and the electric vehicle. The method for estimating the driving range of the electric vehicle comprises the following steps: collecting the current temperature of the electric vehicle, wherein the current temperature belongs to a preset low-temperature range; calculating a first available electricity quantity of the battery in a preset normal temperature range and a second available electricity quantity of the battery at the current temperature according to a battery electricity quantity model; calculating the influence of the preset low-temperature range influence factor on the driving range of the electric vehicle, wherein the preset low-temperature range influence factor comprises at least one of low-temperature electric quantity attenuation, low-temperature whole vehicle resistance increase, air conditioning system power consumption and DC/DC output of a DC converter; and calculating the driving range of the electric vehicle at the current temperature according to the influence of the preset low-temperature range influence factors on the driving range of the electric vehicle. The influence of four factors is considered, and the estimation accuracy of the driving range of the low-temperature electric vehicle is improved.
本发明提供了一种电动汽车续驶里程的估算方法、装置及电动汽车。该电动汽车续驶里程的估算方法包括:获取电动汽车的当前温度,所述当前温度属于预设的低温范围;根据电池电量模型计算预设常温范围电池的第一可用电量和当前温度下电池的第二可用电量;计算所述预设的低温范围影响因素对电动汽车续驶里程的影响,所述预设的低温范围影响因素包括:低温电量衰减、低温整车阻力增加、空调系统耗电以及直流转换器DC/DC输出中的至少一者;根据所述预设的低温范围影响因素对电动汽车续驶里程的影响计算所述电动汽车在当前温度下的续驶里程。考虑了四个方面因素的影响,提高了低温电动汽车续驶里程的估算精确度。
Method and device for estimating driving range of electric vehicle and electric vehicle
一种电动汽车续驶里程的估算方法、装置及电动汽车
17.09.2021
Patent
Elektronische Ressource
Chinesisch
IPC: | B60L PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES , Antrieb von elektrisch angetriebenen Fahrzeugen |
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