A new energy vehicle battery management system

Abstract

The invention relates to the technical field of a battery management system, in particular to a new energy automobile battery management system. The new energy automobile battery management system comprises a battery management unit and a battery control unit; the battery management unit is used for acquiring battery brick information and uploading the information to the battery control unit whichis communicated with the battery management unit; and the battery control unit receives the battery brick information uploaded by the battery management unit which is in communicating connection withthe battery control unit, and performs SOC estimation and balanced control operation. Equivalent parameters of the battery are estimated by a real-time on-line estimation method, so that the SOC state of a battery pack is estimated accurately. The calibration work of the battery is simplified through real-time on-line estimation. Accurate control on the battery pack state with low consistency isrealized. Through real-time on-line estimation, both the new battery and the aged battery can maintain high precision and high error correction capability.

Description

technical field [0001] The invention relates to the technical field of battery management systems, in particular to a new energy vehicle battery management system. Background technique [0002] The core key of traditional fuel vehicles is inseparable from the so-called "three major parts": engine, chassis and gearbox. There are also commonly known "three major parts" in new energy electric vehicles: battery, motor and electronic control. Automobile is still a relatively new industry in the world, and there is not much difference in the start of enterprises in various countries. This also allows Chinese enterprises to compete with foreign enterprises in automobiles, a multi-purpose power-driven tool that was invented in 1886. condition. The electronic control in the "three major parts" of new energy electric vehicles is generally called the battery management system BMS in the industry. [0003] The biggest difference between new energy electric vehicles and traditional fue...

AI Technical Summary

Problems solved by technology

These two communication methods can reduce the wiring of BMS and reduce the complexity of the electric vehicle's internal circuit, but its reliability and anti-interference ability are not as good as CAN bus

[0024] New energy transportation equipment, especially in electric vehicle (EV) systems, in order to meet the requirements of cruising range and vehicle speed, it is necessary to use series-parallel combination of battery packs. However, the series-parallel combination of a large number of batteries will inevitably lead to battery The reliability and life of the group are greatly reduced

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