Battery string length detection device

The utility model provides a battery string length detection device comprising a transmission module used for transmitting a to-be-detected battery string to a detection position; the control detection module is used for controlling the device to operate and detecting the length of the battery string; the classification module is controlled by the control detection module and is used for classifying and placing the detected battery strings; and the power supply module is used for supplying power to the device. The battery string length detection device has the advantages that the problems that an existing picking method is large in workload, long in consumed time and large in measurement error, follow-up picking of battery pieces is affected, and production efficiency is reduced are solved, the battery string length detection device can automatically detect the length of a conveyed battery string and output a detection result, and the production efficiency is improved. And qualified and unqualified battery st