A lithium battery power module management system and method thereof

Abstract

The invention relates to the technical field of charging and discharging protection for lithium batteries, in particular to a power module management system and method for lithium batteries. The power module management system and method are used for managing the power module formed by the lithium batteries; the power module comprises a plurality of battery packs, a power module management unit and a charger; each battery pack is formed by connecting a plurality of battery pieces in series; each battery piece comprises a single battery or a plurality of single batteries; each battery piece is connected with a first change-over switch in parallel; the first change-over switches in each battery pack form a switch array; each switch array is connected with a battery pack control unit; the battery pack control unit can monitor state parameters of charging and discharging states of the battery pieces and can send out a corresponding drive signal to control one first change-over switch in one switch array to change the state, so that the corresponding battery piece is shifted out of a charge and discharge loop; the power module management unit is connected with the battery pack control unit; the charger is connected with the power module management unit; and the power module management unit generates an instruction according to the state parameters, and controls the charger to adjust the charging mode and the charging current magnitude.

Description

technical field [0001] The invention belongs to the technical field of lithium battery charging and discharging protection, and in particular relates to a lithium battery power supply module management system and a method thereof. Background technique [0002] At present, electric vehicles have attracted more and more countries' attention due to their unique advantages of energy saving and environmental protection, and a lot of related research and development work has been carried out. Among them, power lithium battery power supply has become the mainstream electric power source technology due to its advantages of small size, light weight, high energy density, no memory effect, long service life, wide application range, high working voltage and low self-discharge rate. [0003] Usually, power lithium batteries are used in series in groups, and multiple groups are connected in series and parallel to form a battery pack. When the battery pack is charging, if the charging vol...

AI Technical Summary

Problems solved by technology

[0006] In order to overcome the problems caused by the difference in battery consistency in the current power lithium battery power supply, the purpose of the present invention is to provide a lithium battery power supply module management system, which can realize the battery cell in a relatively simple and economical way. Overcharge and overdischarge abnormal state protection, thereby improving the capacity of the battery pack and prolonging the service life of the battery pack, and when the battery has a potential failure, the damaged battery can be removed from the main circuit, allowing the remaining batteries to continue to provide power, Improved battery system reliability

Images