Aiming at the problem of manual battery thermal cell assembly defect detection relying on manual resolution

a method for detecting thermal battery assembly defects based on image analysis is proposed.By analyzing on standard single cell and the defective single cell of the thermal battery

the internal flip-chip of the single cell in the thermal battery

the leakage of the single cell and the assembly order are performed by the internal structural characteristics of the thermal battery

a non-destructive testing system is established.The principle is using template matching to extract battery stack in battery picture taken by X-ray apparatus

and perform vertical scanning on different positions of battery stack to generate waveform diagram of gray scale and position

and perform defects judgement by self-contrast and structural feature parameters of multiple positions.In the end

the correct rate for nondestructive battery testing is 94 %

and the accuracy of defective batteries is 96 %.