In view of the problem of less parameter identification and low detection efficiency in the product testing process of supercapacitor series modules,an automatic testing platform for supercapacitor series modules was developed.Through the SolidWorks software,the overall mechanical design of the automatic testing platform was completed; through the CX-programmer platform,the PLC automatic control system was completed,by which the detection of the voltage division,differential voltage,total voltage,internal resistance,the function of unqualified product screening and automatic power release were realized.Finally,the actual operation test of the automatic detection platform was carried out.The test results show that the test bench can effectively complete the detection of capacitor module parameters and realize the functions of screening unqualified products and automatic power release.It has the characteristics of high degree of automation,convenient use and high efficiency.