A modular management system for a series battery pack

Abstract

A series battery management system includes: M series battery management devices configured to correspondingly manage M series battery packs composed of N series single cells, wherein each series battery management device includes a conversion unit electrically connected to a plurality of series single cells respectively and configured to adjust the electric quantity between adjacent and non-adjacent single cells; a control unit electrically connected to the conversion unit, configured to detect a battery state and control an operation mode of the conversion unit; a wireless communication unitelectrically connected to the control unit and configured to communicate with an external battery management master control system to transmit a battery detection result and receive a battery controlsignal. M and N are integers greater than or equal to 2, and the last cell of the Pth battery pack is also the first cell of the P+1 th battery pack, where P is an integer greater than or equal to 1and less than or equal to M-1.

Description

technical field [0001] The invention relates to the technical field of battery management, in particular to a modular management system 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 cells in the ba...

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

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