Intelligent energy management system of power battery pack

Abstract

The invention discloses an intelligent energy management system of a power battery pack. The intelligent energy management system comprises a main controller and a plurality of single battery intelligent management modules, wherein single batteries in the power battery pack are divided into a plurality of groups, each group is corresponding to each single battery intelligent management module and comprises at least one single battery, each single battery intelligent management module is used for monitoring a state of the single battery in the group, the abnormal single battery (group) is isolated when a monitoring result is abnormal, communication of the power battery pack is maintained, and the main controller is used for performing voltage regulation on total output voltage after control of each single battery intelligent management module and continuously outputting a preset stable current and total voltage. A failure battery is intelligently and automatically removed on line, the battery pack is enabled to still continuously and stably output a normal voltage and a normal current when the batteries in the whole group do not exceed a plurality of failure batteries in a certain proportion, so that the reliability and the availability of the power battery pack within planned backup time are guaranteed and improved, and the service lifetime of the battery pack is prolonged.

Description

technical field [0001] The invention relates to battery management technology, in particular to an intelligent energy management technology for a power battery pack. Background technique [0002] The power battery pack refers to a battery pack that can provide DC power to the outside world in units of groups. For example, the backup battery of the uninterruptible power supply system (hereinafter referred to as UPS): after the external power input fails, the UPS generally releases (inverts) the energy of the backup battery and quickly puts it into power supply for the electrical equipment. It will not lose power when the time is off. Power battery packs are widely used in various industries, such as UPS in computer rooms or control rooms, power battery packs in electric vehicles, DC communication power supplies in base stations, etc. Power batteries are generally used in groups, such as the 240V DC DC bus system of UPS, which uses 20 12V lead-acid batteries connected in ser...

AI Technical Summary

Problems solved by technology

[0013] However, according to the existing group charging and group discharging methods, because the consistency of the battery cannot be continuously guaranteed, it is impossible to avoid the phenomena of overcharge, overdischarge, and undercharge of a single battery in the group.

Since the existing power batteries generally adopt the whole group management mode, it is difficult to effectively compatible or automatically deal with problems such as poor consistency of single cells in the group and failure of single cells

As a result, the biggest disadvantages of using and managing batteries in groups: the barrel effect, the failure of a single battery leads to the failure of the entire group, and the performance of the battery pack depends largely on the single battery in poor condition

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