Battery management system for electric vehicle

Abstract

The invention discloses a battery management system for an electric vehicle. The battery management system is characterized by comprising a collection unit, a judgment unit, a transmission unit, a control module, a charging protection unit, a processing unit and an alarm unit, wherein the control unit is connected with the processing unit, the transmission unit and the charging protection unit separately; the alarm unit is connected with the processing unit; and the collection unit, the judgment unit and the transmission unit are sequentially connected. Compared with the prior art, the battery management system has the advantages that the control unit measures total voltage of a battery pack, battery working current and insulation resistance at relatively high accuracy, and carries out data analysis and fault judgment on battery work data collected from the collection unit according to a preset fault threshold, carries out comprehensive analysis on the basis of the battery work data according to battery protection requirements and overall vehicle control requirements, gives alarm information of a battery system, and reflects the battery work data, the alarm information and the working state of the battery management system to on-board equipment in real time through a bus for data exchange with the overall vehicle, so that the battery management system is safer and more reliable and has real time and efficiency on management of power batteries of the electric vehicle.

Description

technical field [0001] The invention relates to the technical field of electric vehicles, in particular to a battery management system for electric vehicles. Background technique [0002] Automobiles have been around for more than 100 years, and have gone through three stages: from manual production in Europe to automated production in the United States, to lean production in Japan. The appearance of automobiles has promoted economic development and improved people's lives, but the use of traditional automobiles has brought about problems in energy, environmental protection and safety. So people are turning their attention to electric vehicles. Modern electric vehicles have outstanding advantages such as high energy utilization rate, diversified energy sources, low noise, and zero emission of pollutants. They have become one of the important means of transportation in the 21st century, and have broad development prospects. And the high attention of scientific research inst...

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Problems solved by technology

[0003] Aiming at the above-mentioned problems existing in the prior art, the present invention provides a battery management system for electric vehicles to solve the problem of insufficient real-time management of power batteries in the existing systems, and the system is often not safe and reliable because of untimely response. Management of technical issues with less than ideal efficiency

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