High-rate lithium battery module consistency detection method

The invention discloses a high-rate lithium battery module consistency detection method, which comprises the following steps: (1) carrying out capacity grading test on unscreened battery cells, dividing the battery cells with close capacity into one group, and charging to the same voltage, (2) connecting the batteries in the step (1) in series to form a group, then connecting a BMU and an upper computer, and carrying out test according to'standing-50A discharge-200A discharge ', (3) calculating the voltage difference delta U of the module at the discharge last stage in the 200A discharge process, recording the highest and lowest cell voltages, and uploading the data to a manufacturing execution system for storage through an upper computer; and (4) rejecting the cells with poor consistency in the module. According to the method, the consistency of the single batteries in the battery module is effectively detected in a high-rate discharge detection mode of the batteries, meanwhile, the detection result can be u