A device for automatically replacing slave control units by using ground wires and its master-slave matching method

Abstract

The present invention discloses a device of utilizing a ground wire to replace slave control units automatically and a master-slave matching method thereof. The device comprises a master control unit, a plurality of slave control units in communication connection with the master control unit separately, voltage processing units in one-to-one correspondence connection with the slave control units, voltage acquisition units in one-to-one correspondence connection with the voltage processing units and a battery pack comprising the battery modules in one-to-one correspondence connection with the voltage acquisition units. Each slave control unit comprises a board number generation module, the voltage acquisition units acquire the voltages of the nodes of the corresponding battery modules respectively and transmit the voltages to the voltage processing units, the voltage processing units obtain the corresponding characteristic voltages according to the voltages of the nodes of the battery modules respectively and an external reference voltage and input to the corresponding slave control units, and the board number generation modules of the slave control units generate the board numbers used for determining the communication positions of the slave control units respectively according to the characteristic voltages. According to the present invention, the advantages that the board number setting speed is fast, the occupied resources are few, the different slave control units can be switched at will, and the equipment realization is simple, are realized.

Description

technical field [0001] The invention relates to the technical field of new energy vehicles, and more specifically relates to a device for automatically replacing a slave control unit by using a ground wire and a master-slave matching method thereof. Background technique [0002] At present, the BMS (power management system) slave control units that support the quick change mode require the slave control unit to have its own board number, so that the master control unit can identify the board number of the slave control unit, so as to manage and control the system. In general, the board number of the BMS slave control unit generally depends on the master control unit for allocation. When the master board is required to allocate, the slave control unit needs to provide some specific signals so that the master control unit can assign the board number based on this information. Assignment, this kind of information is usually unique to a certain slave control unit, that is to say...

AI Technical Summary

Problems solved by technology

In general, the board number of the BMS slave control unit generally depends on the master control unit for allocation. When the master board is required to allocate, the slave control unit needs to provide some specific signals so that the master control unit can assign the board number based on this information. Assignment, this kind of information is usually unique to a certain slave control unit, that is to say, each slave control unit has its own unique information, and it is impossible to switch between slave control units arbitrarily. In addition, a special board number is generated Modules are more difficult to implement

Images