Vehicle battery management system and battery management method thereof

Abstract

The invention discloses a vehicle battery management system, which comprises a battery management master controller, and also comprises: a plurality of slave controllers which are correspondingly connected with battery cell modules respectively, wherein the battery cell modules are connected in series; and a master control transceiver which is in wireless communication connection with each slave controller, wherein the master control transceiver receives the information sent by the slave controllers and transmits the information to the battery management master controller. Correspondingly, the invention further discloses a battery management method of the vehicle battery management system, and the battery management method can ensure that the vehicle battery management system can still work in a fault state when a single point of failure occurs through optimization design of a management strategy.

Description

technical field [0001] The invention relates to a vehicle management system, in particular to a vehicle battery management system. Background technique [0002] In the field of high-voltage battery systems for new energy vehicles, in order to monitor and manage the state of the vehicle battery, obtain information such as battery capacity, battery temperature, battery life, and battery working boundaries, it is generally necessary to measure the voltage of each cell that makes up the battery and the corresponding temperature. [0003] In the existing technology, the battery sampling controller is mostly responsible for collecting the battery voltage and temperature as the slave controller, and the battery management controller is responsible for processing the collected data as the master controller. Carry out charge and discharge control and safety protection processing. In this design scheme of the prior art, the master-slave controller generally communicates through CAN,...

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Problems solved by technology

[0004] It can be seen that the design of the vehicle battery management system in the above prior art requires additional isolation design, and the layout of the wiring harness is complicated, which will not only greatly increase the cost, but also occupy space

In addition, when the above-mentioned design scheme of the prior art is adopted, when the core device fails, the monitoring of the vehicle battery will be lost. At this time, the system must enter a fail-safe mode, which seriously affects the drivability and driving safety of the vehicle.

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