Battery management system and method for short circuit detection and turn-off by adopting same

Abstract

The invention provides a battery management system which comprises a short circuit detection and self-locking module and a circuit shut-off module, wherein the short circuit detection and self-locking module comprises a short circuit detection module for short circuit detection and a self-locking module for short circuit turnoff and locking when the short circuit detection module detects that a circuit is short-circuited, and the short circuit detection module comprises a detection signal line and a first comparator connected with the detection signal line to carry out detection data and reference data comparison; and the circuit shut-off module is used for receiving a circuit status signal sent out by the self-locking module to carry out circuit turn-on or turn-off treatment according to the circuit status signal. With the adoption of the battery management system, the turn-off treatment can be quickly carried out on the short-circuited circuit.

Description

technical field [0001] The invention relates to the management technology of series battery packs, in particular to a battery management system with short-circuit detection and shutdown functions and a short-circuit detection and shutdown method using the system. Background technique [0002] The battery management system is responsible for managing the calculation, control, and protection of batteries and battery packs, the power balance between each battery or battery pack, various electrical tests, and signal communication inside and outside the system. Generally speaking, any product that uses batteries needs to be controlled by a battery management system, especially when using a battery pack with a higher number of batteries connected in series, the more complex battery management functions are required. In terms of transportation, the number of strings can be divided into electric bicycles, electric motorcycles, electric golf carts, electric cars and other levels from...

AI Technical Summary

Problems solved by technology

Usually, a fixed protection IC scheme can be used to match the peripheral circuit design switch. However, this method is limited by the support of the function of the protection IC itself, or the provision of unnecessary functions.

In particular, the function of short-circuit detection will be limited by the detection time spent by the protection IC in order to execute the shutdown action, resulting in a longer time for short-circuit detection and shutdown

In addition, after the current battery management system is shut down after short-circuit detection, another circuit is needed to restore the short-circuit, which makes the design of the battery management system more complicated.

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