▎ 摘　　要

NOVELTY - A composite battery, comprising one cell unit, one capacitor element and one power supply management unit. The battery unit comprises one shell, one filling the electrolyte and one set in the shell body and the electrolyte in the graphene layer, the capacitor unit and the cell unit in the shell body in connection in series, the power supply management unit, including one respectively electric connected with and used for controlling the battery unit and the capacitor element is the switch connection, and one used for comparing voltage and one preset voltage of the battery unit and with the control processor and the switch and the battery unit and the capacitor element. This new utility model can give consideration to both large capacity stable battery use and fast charging and discharging capacitance equal characteristics, increase whole electric efficiency.