The invention provides a low-temperature lithium ion battery alternating-current preheating method and system based on constant-current and constant-voltage charging and discharging. The method comprises the steps: determining a safety current threshold value and a battery voltage safety threshold value of a to-be-charged battery; alternately performing alternating-current preheating on the battery in a constant-current constant-voltage charging mode and a constant-current constant-voltage discharging mode, wherein in the constant-current and constant-voltage charging mode, the battery is charged according to the safety current threshold value of the battery to be charged, and when it is detected that the voltage of the battery end reaches the upper limit of the safety voltage threshold value, the constant-voltage safety voltage threshold value continues to be charged; and in the constant-current and constant-voltage discharge mode, the battery is discharged according to the safety current threshold value of the battery, and when it is detected that the voltage at the battery end reaches the lower limit of the safety voltage threshold value, the constant-voltage safety voltage threshold value upper limit continues to discharge. carrying out the preheating within a battery current and voltage safety threshold value, thereby reducing the damage to the battery; and carrying out the preheating according to the maximum value of the battery safety current, thereby improving the preheating efficiency.
本公开提出了基于恒流恒压充放电的低温锂离子电池交流预热方法及系统,包括:确定待充电电池的安全电流阈值及电池电压安全阈值;采用恒流恒压充电模式和恒流恒压放电模式交替对电池进行交流预热;其中,恒流恒压充电模式下以待充电电池的安全电流阈值对电池进行充电,检测到电池端电压达到安全电压阈值上限时,恒定电压安全电压阈值上限继续充电;恒流恒压放电模式下以电池的安全电流阈值对电池进行放电,检测到电池端电压达到安全电压阈值下限时,恒定电压安全电压阈值上限继续放电。在电池电流电压安全阈值内进行预热,降低对电池的损伤;以电池安全电流最大值进行预热,提高预热效率。
Low-temperature lithium ion battery alternating-current preheating method based on constant-current and constant-voltage charging and discharging
一种基于恒流恒压充放电的低温锂离子电池交流预热方法
2021-04-16
Patent
Elektronische Ressource
Chinesisch
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 |
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