Electric automobile and battery management system thereof

Abstract

The invention provides an electric automobile and a battery management system thereof. The system comprises single batteries, a mother board and a plurality of daughter boards, the daughter boards corresponding to a plurality of single batteries exchange information with the mother board through CAN (controller area network) buses, acquire temperature information and voltage information of the single batteries and transmit the information to the mother board, the mother board/daughter boards can calculate the score of the daughter boards according to the variance of average temperature and thevariance of average voltage of the daughter boards within a certain time period by score parameters obtained by a ranking algorithm, and the mother board/daughter boards can dynamically adjust the priority of the daughter boards according to the score of the daughter boards. The system solves the problems that a traditional battery management system adopts a static scheduling algorithm in communication, consequently, important data information sometimes cannot be transmitted or timely transferred, and the traditional battery management system cannot timely find battery defects. Daughter boardmessage transmitting reliability and safety are realized, and the performance of the electric automobile is further improved.

Description

technical field [0001] The invention relates to the technical field of communication of battery management systems, in particular to a battery management system for electric vehicles and an electric vehicle using the battery management system. Background technique [0002] The battery management system (Battery Management System, BMS) is the core of the electric vehicle and the central control center of each component of the electric vehicle. The good operation of the battery management system is of great significance to ensure driving safety and prolong the service life of the battery. . From the perspective of topology, BMS can be divided into two types: centralized and distributed according to different project requirements. All acquisition units are centralized on the centralized BMS, and the main control chip is responsible for collecting battery information and data calculation and processing functions at the same time. This form has a simple structure and low cost, a...

AI Technical Summary

Problems solved by technology

[0005] In order to solve the large amount of interactive information and messages between the main board and the sub-board in the existing battery management system, it is easy to cause network congestion, signal transmission delay, and important message information cannot be transmitted in time, thus affecting the reliability of the BMS system and safety, thereby affecting the performance of electric vehicles, the present invention proposes a new type of battery management system, which is controlled by the main board / sub-board and dynamically adjusts the priority of each sub-board through a specific algorithm to realize the message information of each sub-board Reliability and safety of transmission, thereby improving the performance of electric vehicles

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