The use of energy storage devices are exposed to more and more problems,of which the biggest problem is the short life and heavy metal pollutants recycling issues.Supercapacitor has the advantages of faster charge,long cycle life,little pollution,and etc.Single supercapacitor can not meet the voltage demand due to its low voltage,so,multiple supercapacitors in series are required.However,the difference between the single supercapacitors results in the uneven voltage allocation of each single supercapacitor,which causes the significant decrease of the energy storage and accelerates the performance degradation of supercapacitors.To solve the above problems,the same design with the supercapacitor voltage balance circuit connected,constituted a supercapacitor module,and a number of supercapacitor modules,the microcontroller and the related circuitry formed the supercapacitor energy storage devices.The experimental results show that the supercapacitor energy storage has excellent energy storage effect,and a promising application prospect.