Active equalizing system for multi-path energy transmission battery

Abstract

The invention discloses an active equalizing system for a multi-path energy transmission battery. The active equalizing system for the multi-path energy transmission battery comprises a total battery pack, an equalizing power supply unit, a battery equalizing module, an energy buffer module and an equalizing system host; the total battery pack is concatenated by more than one battery blocks and electrically connected with the battery equalizing module; one end of the equalizing power supply unit is electrically connected with the equalizing system host and the battery equalizing module respectively, and the other end is electrically connected to the battery pack; each battery equalizing module is electrically connected with the energy buffer module; the energy buffer module is an energy buffer device assisting the battery equalizing module, and the energy buffer module is connected to each battery equalizing module electrically; the equalizing system host analyzes, processes and displays the information sent by each battery equalizing module through the CAN bus, and controls the control strategy of each battery equalizing module. According to the invention, the structure design of the active equalizing system for the multi-path energy transmission battery is simple and reasonable, the cost is reduced, the stability of the system is improved, the inconsistency of the battery pack is improved, and the service life of the battery is extended.

Description

technical field [0001] The invention relates to the technical field of battery equalization, in particular to an active equalization system for multi-path energy transmission battery packs. Background technique [0002] To address energy and emissions issues, electric vehicles (EVs) have received increasing attention. As a vehicle power supply for EVs, dozens or even hundreds of batteries are usually connected and used at the same time. Therefore, the control and management of battery packs is a key technology to ensure the good operation of clean cars. Because the manufacturing process will cause the performance of each single battery to be inconsistent, when many groups of batteries are used repeatedly at the same time, it will cause different degrees of aging and damage, so the performance and parameters of each battery cannot be kept consistent for a long time. It will affect the normal progress of the overall charge and discharge process, not only cause overcharge and ...

AI Technical Summary

Problems solved by technology

However, there are differences in the performance of battery cells during production, and the inconsistency of the entire battery pack will further expand during use, thus causing the "short board effect"

The charging cut-off voltage of the battery pack is determined by the battery with the lowest charging cut-off voltage in the group, and the discharge cut-off voltage of the battery pack is determined by the battery with the highest discharge cut-off voltage in the group, so the maximum available capacity of the battery pack is completely determined by the single cells in the group It is decided that this will not only cause a great waste of battery pack capacity, but also overcharge and overdischarge of a single battery cell will directly affect the aging speed and service life of the entire battery pack.

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