Battery management system and detection method thereof

Abstract

The invention discloses a battery management system and a detection method thereof. The system includes: a controller, multiple master-slave modules connected in series, current sensors connected to the controller, multiple battery management modules connected in series, multiple external connectors and multiple internal connectors. The current of the slave module; adjacent master-slave modules are connected through external connectors, and the master and slave modules in each master-slave module are connected through internal connectors; for each battery management module, the battery management The module is used to manage the corresponding master-slave module and the external connector connected to the master-slave module. The controller is used to judge the multiple external connections based on the sampling data and current of multiple external connectors when the current is not zero. Whether there is a fault in the connector, and based on the sampling data and current of multiple cells in multiple master-slave modules, determine whether multiple internal connectors are faulty. According to the embodiment of the present invention, the fault detection of the inter-module connector is realized.

Description

technical field [0001] The invention relates to the field of new energy, in particular to a battery management system and a detection method thereof. Background technique [0002] In the battery management system, the connection mode between battery modules can be a master-slave connection mode, which is called a master-slave module. The master-slave module usually adopts the mode of one master and one slave. The master control board is located on the master module, and the slave module has no control board. The master module and the slave modules are connected through connectors and cascading wire harnesses. The battery management system may include multiple master-slave modules connected in series, and two adjacent master-slave modules are also connected through connectors and cascading harnesses. [0003] As the service time of the battery management system increases, components such as the connectors between the master module and the slave modules and the connectors be...

AI Technical Summary

Problems solved by technology

The failure of the connector will lead to inaccurate cell voltage collected by the battery management system and the safety risk of the entire vehicle.

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