Diagnosis system and diagnosis method for lithium ion secondary battery

A diagnosis system for a lithium ion secondary battery comprising:

• a manufacturing quality information collection processing unit which collects manufacturing quality information from manufacturing processes of a single battery and module battery using the single battery of a lithium ion secondary battery;
• a manufacturing quality management database which stores the manufacturing quality information collected by the manufacturing quality information collection processing unit;
• an operation result information collection processing unit which collects operation result information from the module battery in operation under a usage environment;
• an operation result database which stores the operation result information collected by the operation result information collection processing unit;
• an operation result monitoring processing unit which monitors an operation condition of the module battery by using the operation result information;
• a manufacturing/usage environment factor classification processing unit which determines, based on the manufacturing quality information in the manufacturing quality management database and the operation result information in the operation result database, whether an abnormality factor of an operation result detected by the operation result monitoring processing unit is caused by a usage environment factor or a manufacturing factor;
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• a diagnosis result creation processing unit which creates a diagnosis result of the module battery to be diagnosed based on a processing result of the operation result monitoring processing unit and a processing result of the manufacturing/usage environment factor classification processing unit.