Lithium ion battery diagnostic system and lithium ion battery diagnostic method

摘要

PROBLEM TO BE SOLVED: To provide a battery module monitoring device capable of accurately predicting the lifetime of a secondary battery, and to provide a charging device and a battery module.SOLUTION: A lithium ion battery diagnostic system comprises: a battery performance management storage part for storing manufacturing information representing the result of a test or an inspection of a module battery, etc., before shipment, and operation information representing the result of a test or an inspection of a material constituting the module battery, etc., after shipment for every module battery, etc.; a manufacturing information collection processing part for storing the manufacturing information and normal operation model information in the battery performance management storage part; an operation information collection processing part for storing operation information of a module battery determined as a module battery being unusual at charging and discharging the module battery in the battery performance management storage part; a defect determination processing part for outputting a diagnostic result that, when determining that operation information received by the operation information collection processing part and the operation information of the module battery determined as unusual by the operation information collection processing part are similar, both are similar; and a communication part for transmitting the diagnostic result to a charging device and receiving operation information from the charging device.