Battery module number automatic identification method and battery management system

Abstract

The invention provides a battery module number automatic identification method. The battery module number automatic identification method comprises the steps of determining a first target battery module, and detecting signal information between the first target battery module and a battery management unit and between the first target battery module and a monitoring unit; obtaining a first positioning distance between the first target battery module and the battery management unit and a first positioning distance between the first target battery module and the monitoring unit; acquiring batteryinformation; and comparing the first positioning distance with the battery information to obtain number information of the first target battery module. The invention further provides a battery management system. According to the method, the number information can be efficiently, accurately and automatically identified, the flexibility is high, the expansion is convenient, when the battery moduleis newly added, disassembled and replaced, the new battery module can be simply and conveniently positioned and the number information of the new battery module can be bound, and meanwhile, the unbinding operation of the old battery module is also facilitated.

Description

technical field [0001] The invention relates to the technical field of new energy vehicles, in particular to a battery module number automatic identification method and a battery management system. Background technique [0002] The energy crisis and the aggravation of environmental pollution have prompted people to pay more attention to the development of energy-saving and environmentally friendly vehicles, and with the country's continuous increase in investment in electric vehicles, the technology of electric vehicles has developed rapidly. In electric vehicles or hybrid vehicles, the battery pack mainly composed of multiple power batteries provides the power source for the electric vehicle, and the battery management system is generally used to monitor and manage the battery status. The battery management system can not only prevent safety hazards such as overvoltage and overheating of the battery, but also prolong the service life of the battery through effective managem...

AI Technical Summary

Problems solved by technology

[0004] The problems existing in the prior art are as follows: first, the communication between the master module, the slave module and the vehicle control unit is still dominated by CAN (Controller Area Network, Controller Area Network) bus communication, and another part adopts It is the communication method of Daisy Chain (daisy chain topology); these two communication methods connect the power batteries through the wiring harness, and there are potentials between each power battery and the battery management unit, as well as between multiple power batteries Therefore, it is necessary to isolate the communication circuit, and the wiring harness connection also limits the flexibility of the overall design of the battery pack; second, among the methods used to identify the position of each module, one is to identify through the difference of CAN data, The other is through software calibration; these two identification methods are not conducive to expansion, and the later management or processing is complicated, and more human intervention also reduces the reliability of the system

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