The invention relates to the field of batteries, in particular to a buck-boost charging circuit and a control method thereof. The method is only suitable for a variable-voltage floating charging mode, a three-phase full-bridge conversion circuit comprising three inductors and six electronic power switches, a relay switch, a high-voltage battery, a low-voltage battery and a charger form a buck-boost charging circuit, and according to the variable-voltage floating charging mode, the three-phase full-bridge conversion circuit comprising the three inductors and the six electronic power switches is connected with the high-voltage battery and the low-voltage battery through switching of the relay switch. The buck-boost charging circuit is switched to a BUCK converter mode or a BOOST converter mode; determining a target voltage according to the variable voltage floating charge mode; and according to a preset voltage reference value and the target voltage, a modulation wave is calculated and generated, and the modulation wave drives different power electronic switches to work through a pulse width modulation generator, so that the buck-boost charging circuit generates the target voltage to charge the high-voltage battery or the low-voltage battery. According to the invention, charging can be carried out by using the motor controller and the motor winding of the vehicle, charging can be carried out at any place, and the charging convenience and flexibility are improved.
本发明涉及电池领域,具体涉及一种升降压充电电路及其控制方法。该方法仅适用变电压浮充模式,将包括三个电感和六个电力电子开关的三相全桥变换电路、继电开关、高压电池、低压电池和充电机,组成升降压充电电路,根据变电压浮充模式,通过切换继电开关,使升降压充电电路切换为BUCK变换器模式或BOOST变换器模式;根据变电压浮充模式确定目标电压;根据预设的电压参考值与目标电压,计算产生调制波,调制波经脉冲宽度调制发生器驱动不同电力电子开关工作使升降压充电电路产生目标电压为高压电池或低压电池充电。本发明能利用车辆本身的电机控制器和电机绕组进行充电,可以在任何地方进行充电,提高了充电的便利性和灵活性。
Buck-boost charging circuit and control method thereof
一种升降压充电电路及其控制方法
09.04.2024
Patent
Elektronische Ressource
Chinesisch
IPC: | H02J CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER , Schaltungsanordnungen oder Systeme für die Abgabe oder Verteilung elektrischer Leistung / B60L PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES , Antrieb von elektrisch angetriebenen Fahrzeugen / H02M APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS , Anlagen zur Umformung von Wechselstrom in Wechselstrom, von Wechselstrom in Gleichstrom oder umgekehrt, oder von Gleichstrom in Gleichstrom und zur Verwendung in Netzen oder ähnlichen Stromversorgungssystemen |
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