A method for monitoring abnormal reset or abnormal power failure of battery management system

Abstract

The invention discloses a method for monitoring abnormal resetting or abnormal power failure of a battery management system. The battery management system comprises a control unit for controlling the operation of the whole system, as well as a data storage unit and a failure alarming unit both connected with the control unit; the control unit assigns a value A to the flag bit, namely POWER_FLAG, of the data storage unit; when the battery management system receives an normal power off signal, a value B is assigned to the POWER_FLAG, and when the battery management system is subjected to abnormal resetting or abnormal power-off, the value of the POWER_FLAG is kept to be A; when the battery management system is subjected to power on again, if the value of the POWER_FLAG is found to equal to A, the abnormal resetting or abnormal power failure is judged by the control unit; when the frequency of abnormal resetting or abnormal power failure exceeds the certain frequency, the failure alarming unit judges the failure and outputs alarming signals. According to the method, the situation of abnormal resetting or abnormal power failure of the battery management system can be efficiently monitored, and the alarming signals can be output to remind personnel to perform maintenance.

Description

technical field [0001] The invention relates to a battery management system, in particular to a method for monitoring abnormal reset or abnormal power failure of the battery management system. Background technique [0002] During the operation of the battery management system, the program may run away due to software loopholes or interference from the external environment, and the battery management system may reset. When the battery management system resets, it will affect the normal communication and control of the electric vehicle, causing the high voltage of the battery to be cut off and affecting the safe operation of the vehicle. Similarly, when the power supply of the battery management system has a short-term problem and causes abnormal power failure, the above problems will also be caused. Because the process of battery management system reset or abnormal power failure is very short, it is difficult to find out from the outside, so it needs to be monitored and reco...

AI Technical Summary

Problems solved by technology

The battery management system is the core component of electric vehicles. The above two occasional situations are relatively large safety hazards for the operation of electric vehicles.

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