Avoidance system and method for short plate effect of battery pack

Abstract

The invention relates to an avoidance system and method for a short plate effect of a battery pack. The battery pack comprises a plurality of electrically connected single batteries, and the avoidancesystem comprises a main control module, an information acquisition module, a bidirectional direct current conversion module and a power supply module. The power supply module provides direct currentelectric signals. The information acquisition module acquires parameter information of the single batteries and feeds back the parameter information to the main control module. The main control moduleanalyzes the parameter information and then judges the short board battery, outputs a first control signal when the battery pack is in a charging state and the short board battery is fully charged, and outputs a second control signal when the battery pack is in a discharging state and the short board battery is completely discharged. The bidirectional DC conversion module discharges the short board battery when receiving the first control signal, and charges the short board battery when receiving the second control signal. According to the avoidance system, the bidirectional direct-current conversion module is controlled by the main control module to correspondingly charge and discharge the short-plate battery, so that the charging and discharging of the whole battery pack are not influenced, and the endurance of the battery pack is improved.

Description

technical field [0001] The invention belongs to the technical field of battery management, and in particular relates to a system and method for avoiding the short board effect of a battery pack. Background technique [0002] At present, the power battery packs for electric vehicles are used in series with multiple large-capacity batteries. In the process of using batteries in series, in order to achieve the purpose of protecting the battery, when a single cell in the battery pack is discharged to the cut-off voltage, the other batteries in the battery pack must stop discharging, but at this time the large battery in the battery pack must stop discharging. Part of the battery is still in a state of being able to discharge electricity, which leads to the problem that the energy of the whole battery pack cannot be fully utilized; similarly, the above-mentioned problem also exists during charging. This is the "short board effect" that exists in the battery pack during charging ...

AI Technical Summary

Problems solved by technology

[0005] In view of this, the embodiments of the present invention provide a system and method for avoiding the short-board effect of a battery pack, aiming to solve the problem that the short-board battery in the battery pack cannot be used in actual use in the traditional battery management technical solution. Under the circumstances, avoid the problem of short-board effect

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