Battery management system and electric vehicle

Abstract

The embodiment of the invention provides a battery management system and an electric vehicle and relates to the technical field of electric vehicles. The battery management system comprises a controller, a first acquisition module and a second acquisition module, the controller is electrically connected with the first acquisition module and the second acquisition module through a daisy chain, thefirst acquisition module and the second acquisition module are electrically connected with a battery pack, and the battery pack comprises a plurality of single batteries; the first acquisition moduleis used for acquiring voltage information and temperature information of each single battery; the second acquisition module is used for acquiring total current information and total voltage information of the battery pack; the controller is used for monitoring and managing the battery pack according to the voltage information, the temperature information, the total current information and the total voltage information. The system has the advantages of being low in cost and meeting the functional safety ASIL C requirement.

Description

technical field [0001] The invention relates to the technical field of electric vehicles, in particular, to a battery management system and an electric vehicle. Background technique [0002] At present, the battery management system of electric vehicles generally adopts a master controller with multiple slave controllers. The controller area network (CAN) is used for communication between the master controller and the slave controllers, which cannot meet the functional safety ASIL C requirements. And both the slave control and the total current and voltage detection modules include a micro control unit (Micro Control Unit, MCU), and the slave control and total current and voltage detection modules process the collected data through the micro control unit, making the hardware cost of the battery management system High, and each micro-control unit needs to run software, and the development cost is high. Contents of the invention [0003] The object of the present invention ...

AI Technical Summary

Problems solved by technology

[0002] At present, the battery management system of electric vehicles generally adopts a master controller with multiple slave controllers. The controller area network (CAN) is used for communication between the master controller and the slave controllers, which cannot meet the functional safety ASIL C requirements.

And both the slave control and the total current and voltage detection modules include a micro control unit (Micro Control Unit, MCU), and the slave control and total current and voltage detection modules process the collected data through the micro control unit, making the hardware cost of the battery management system High, and each micro control unit needs to run the software, the development cost is high

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