Batch battery online weighing device and control method thereof

The invention provides a batch battery on-line weighing device and a control method thereof, the batch battery on-line weighing device comprises a conveying line and a weighing device, the weighing device comprises a conveying mechanism, a guiding mechanism and a weighing mechanism; the conveying line is used for conveying batteries; the conveying mechanism can move up and down, and the batteries are conveyed through rotation of a plurality of rollers which are distributed at intervals in a preset interval space; the weighing mechanism is used for enabling each group of bearing plates to be in contact with a single battery after the conveying mechanism descends so as to realize weighing of a plurality of batteries at the same time; the guiding mechanism contracts to be tightly attached to the battery when the battery enters the conveying mechanism, and extends to be away from the battery after the conveying mechanism descends and before the weighing mechanism weighs the battery. The weighing device is integra