DIAGNOSIS METHOD FOR BREAKDOWN OF BATTERY MANAGEMENT SYSTME

摘要

The present invention relates to a fault diagnosis method for a battery management system, and a fault diagnosis method for a battery management system according to an embodiment of the present invention includes a plurality of battery modules, A plurality of sensing ICs connected in a daisy-chain structure and connected to the lowest sensing IC and the uppermost sensing IC, respectively, of the plurality of sensing ICs, Mode and a top communication mode, the method comprising the steps of: receiving a sensing result of each of the plurality of sensing ICs and diagnosing whether or not the plurality of sensing ICs are faulty; Diagnostic step; A second failure diagnosis step of individually receiving the sensing result of each of the plurality of sensing ICs in the communication mode of either the bottom communication mode or the top communication mode and diagnosing the failed sensing IC among the plurality of sensing ICs; A third fault diagnosis step of individually receiving the sensing result of each of the plurality of sensing ICs in a communication mode different from the communication mode of the second input step and diagnosing a faulty sensing IC among the plurality of sensing ICs; And a failure location diagnosis step of comparing a sensing IC diagnosed as a failure in the second failure diagnosis step with a sensing IC diagnosed as a failure in the third failure diagnosis step and diagnosing the position of the failed sensing IC among the plurality of sensing ICs .