Starting assisting device of internal-combustion engine

The invention provides a starting assisting device of an internal-combustion engine. The starting assisting device of the internal-combustion engine comprises a lithium ion capacitor cell, a voltage detecting unit, a capacitance balancing electric circuit, a first connecting unit and a packaging housing, wherein the lithium ion capacitor cell comprises a plurality of lithium ion capacitor sets which are connected in series; the voltage detecting unit is connected with each lithium ion capacitor set, and is used for detecting the voltage of each lithium ion capacitor set; the capacitance balancing electric circuit is connected with each lithium ion capacitor set and the voltage detecting unit, and is used for balancing the voltage of each lithium ion capacitor set according to a detecting result of the voltage detecting unit; the lithium ion capacitor cell is connected with an internal-combustion engine starting battery through the first connecting unit, and the lithium ion capacitor cell and the internal-comb