The invention relates to an active clamping equalization circuit of a power battery pack. The active clamping equalization circuit comprises an operational amplifier acquisition signal input circuit, an active clamping bidirectional flyback converter processing circuit and a switch array equalization circuit. According to the active clamp equalization circuit of the power battery pack, the operational amplifier acquisition signal input circuit acquires a battery voltage signal through a high-precision operational amplifier, and the high-common-mode voltage has great influence on the performance of the power battery, so that the operational amplifier acquisition is input into the high-precision operational amplifier in a differential form, and the error rate of the voltage signal is effectively reduced. According to the active clamping bidirectional flyback converter processing circuit, energy is stored through an excitation inductor, current is linearly increased, a main switching tube is conducted through current increase, soft switching is achieved, and the signal loss of a battery circuit is reduced. The switch array equalization circuit utilizes battery selection and energy transfer to realize bidirectional switching, and further switches the polarity switch in the voltage direction when the polarity maintaining battery is connected to the secondary side of the equalization main circuit, thereby achieving the effect of equalizing the performance of the battery.
本申请涉及动力电池组有源钳位均衡电路,包括运放采集信号输入电路、有源钳位双向反激变换器处理电路、开关阵列均衡电路。本申请的动力电池组有源钳位均衡电路,运放采集信号输入电路通过高精度运算放大器进行电池电压信号采集,由于高共模电压对动力电池性能有较大影响,运放采集通过差分形式输入高精度运放,有效降低了电压信号误差率。有源钳位双向反激变换器处理电路通过励磁电感储能,使通过电流线性增长,电流增长使主开关管导通实现软开关,降低了电池电路信号损耗。开关阵列均衡电路利用电池选择及能量传递实现双向开关,进而切换极性保持电池接入均衡主电路二次侧时电压方向的极性开关,由此达到均衡电池性能的效果。
Active clamping equalization circuit of power battery pack
动力电池组有源钳位均衡电路
2021-09-21
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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