Impedance online monitoring system and method for parallel battery clusters

• Main Authors: YAN WENQIAN, FAN XIANGUO, LIANG GUOYI, DUAN CHANGJIANG, MUER DELI, JIANG LEI
• Format: Patent
• Language: Chinese; English
• Published: 12.04.2024
• Subjects: MEASURING; MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES; PHYSICS; TESTING

The invention provides an impedance online monitoring system and method for a parallel battery cluster, and belongs to the technical field of battery impedance monitoring. The impedance online monitoring system comprises a battery cluster, a connecting circuit, an excitation device, an MCU, a voltage sampling circuit and an upper computer. According to the method, the limitation problem in the online measurement process of a traditional battery impedance measurement method is solved, for example, the energy storage battery PACK on a single battery cluster cannot be measured at a time due to the limitation of a battery cabin electrical topology cascade structure, the energy storage batteries can only be measured one by one, the efficiency is low, and the cost is high. According to the invention, the PACK of the energy storage batteries on the plurality of battery clusters can be measured at the same time, the measurement efficiency is improved, and the cost is reduced; and the simultaneous online monitoring of