Series battery pack modular management system and method

Abstract

The invention relates to the technical field of battery management, particularly a series battery pack modular management system and method. The system comprises a battery management main control module and M sub management modules with the same structures, and is used for managing a series battery pack formed by T single batteries which are connected in series in sequence; the series battery packis divided into M battery units based on the serial connection sequence of the single batteries; each battery unit comprises N single batteries; the adjacent battery units share one single battery; T, M and N satisfy a relation that T is equal to M*(N-1)+1, and N and M are both positive integers which are greater than or equal to 2; M sub management modules correspondingly manage M battery units;the battery main control management module is used for managing the whole system; each sub management module is used for performing balance management on N single batteries in the corresponding battery units; and the battery main control management module and the sub management modules can perform bidirectional wireless communication. The series battery pack modular management system has the advantages of modular management and wireless transmission.

Description

technical field [0001] The invention relates to the technical field of battery management, in particular to a modular management system and method for series battery packs. Background technique [0002] When using multiple single cells in series to form a battery pack, due to the inconsistency of the capacity of the single cells and the difference in the ambient temperature of the single cells in use, this inconsistency will be exacerbated, which will cause the battery pack to discharge when the battery pack is discharged. , when the single battery with the smallest capacity is exhausted, it cannot be used even if other batteries still have power; while charging the battery pack, the battery with the smallest power is fully charged first, even if other batteries have spare capacity, they cannot be charged again , resulting in a decrease in the overall capacity utilization of the battery pack, so it is necessary to use a battery management system to manage all the single cell...

AI Technical Summary

Problems solved by technology

This active balance management adopts a unified management idea, that is, all single batteries are managed by the same active balance module, and the management of the battery pack cannot be split. When a single battery in the battery pack or a battery in the management module When a component has a problem, all single batteries and all management module components need to be checked one by one. The management and maintenance of the management system is very inconvenient and inefficient

[0007] At the same time, the existing BMS generally adopts the CAN bus transmission method, which not only makes the system wiring complicated, but also when it is applied to electric vehicles, the environmental factors in the driving process of the vehicle will affect the stability of the CAN bus transmission, greatly reducing the overall BMS. stability and reliability

Images