The invention provides a protective method and a protective device of power storage batteries, wherein the method comprising following steps: (1) acquiring a permitted maximum value of input power of the power storage battery and acquiring a maximum value of the voltage of a battery cell in the present power storage battery; (2) determining whether a difference value between the maximum value of the voltage and a preset overvoltage threshold value is greater than zero or not, if the difference value is greater than zero, processing the difference value according to the proportional integral and differential PID control algorithm to obtain a processing result; and (3) obtaining a first power according to the maximum value of the input power and the processing result, and controlling torque of a motor according to the first power for controlling the input power of the power storage battery. According to the embodiment, by means of the protective method, when the power storage battery is subjected to overvoltage, the voltage of the battery can be quickly decreased to below the preset overvoltage threshold value through the proportional integral and differential PID control algorithm. In addition, the circuit change is smooth and steady, so that the protective method and the protective device reduce damage of the overvoltage on the battery and further prolong the service life of the battery.
Protective method and protective device of power storage battery
2015-08-12
Patent
Elektronische Ressource
Englisch
IPC: | H01M Verfahren oder Mittel, z.B. Batterien, für die direkte Umwandlung von chemischer in elektrische Energie , PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY / B60L PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES , Antrieb von elektrisch angetriebenen Fahrzeugen |