Method for charging a battery for supplying power to a drive motor of a motor vehicle

摘要

A method for charging a battery, including: determining a final state of charge and a final temperature of the battery; and calculating charging power and/or cooling power required to reach the two final values within a minimum amount of time.

主权项

1. A battery charger, comprising:
an electrical charging device which delivers a charging power; a cooling device, which delivers a cooling power; an input for receiving a final state of charge and a final temperature of the battery; and a control unit which computes the charging power and/or the cooling power necessary for reaching the two final values in a minimum time by considering equationsΔ⁢⁢Tbal=Tend-Tini=(Qbat-Pcool)Cp×tch(1)tch=Δ⁢⁢SOC×EbatPch(2)Pcool=(Tend+Tini2-5)R⁢⁢th(3)Qbat=Rbat⁡(PchUnom)2(4) wherein: Tini: temperature of the battery in each time frame [° C.]; SOCini: state of charge SOC of the battery; Cp: calorific capacity of the battery [Wh/K]; Ebat: energy of the battery [Wh]; Rth: thermal resistance between the battery and blown air [K/W]; Rbat: electrical resistance of the battery [ohm]; Ubat: voltage of the battery [V]; unom: nominal voltage of the battery; Qbat: charge of the battery; Pcool: cooling power during charging [W]; tch: charging time remaining [h]; Pch: charging power [W]; PCh,max: maximum charging power [W], wherein the control unit controls the electrical charging device and the cooling device based on the charging power and/or the cooling power computed by the control unit.