Active equalization maintenance device and active equalization maintenance method of battery pack

Abstract

The invention discloses an active equalization maintenance device. The device is used for maintaining a battery pack of an electric automobile. The battery pack comprises a plurality of single batteries. The active equalization maintenance device comprises a control module, an equalization module and a conversion module. The control module is connected with the equalization module. The conversionmodule is respectively connected with the equalization module and the battery pack. The control module is used for acquiring voltage values or battery capacity values of all the single batteries and judging whether the voltage values or the battery capacity values of the single batteries fall into a preset interval or not. The control module sends an equalization signal to the equalization moduleaccording to a judgment result. The equalization module controls the conversion module to charge / discharge the single batteries according to the equalization signal. The active equalization maintenance device disclosed by the invention is low in cost, small in size, easy to carry and capable of effectively carrying out equalization maintenance on single batteries. The invention also discloses an active equalization maintenance method of the battery pack.

Description

technical field [0001] The invention relates to the technical field of electric vehicles, in particular to an active equalization maintenance device for maintaining the consistency of electric vehicle battery packs and an active equalization method for the battery packs. Background technique [0002] The current balanced maintenance equipment for power batteries based on electric vehicles is mainly based on the single charger solution, that is, each single battery in the power battery is connected to an independent charger, and then according to the state of charge of the battery through The software algorithm charges the single battery with low power to achieve the purpose of balancing the battery. The existing single charger solution can effectively realize the balanced maintenance function of the single battery of the power battery. However, the single charger solution has the following disadvantages: [0003] 1. Each single battery needs to be equipped with independent ...

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Problems solved by technology

[0003] 1. Each single battery needs to be equipped with independent charging equipment, which is costly and with the continuous development of electric vehicles, the number of single batteries in power batteries is increasing, and the number of charging equipment also needs to be correspondingly increased, which will undoubtedly increase greatly maintenance equipment costs;

[0004] 2. The volume of the maintenance equipment increases with the increase of the number of charging equipment, which is not convenient to use, does not have portability, and is not suitable for the mobile characteristics of electric vehicles, especially the electric vehicles to be balanced cannot be concentrated in one place Balanced operation cannot adapt to the changing maintenance scenarios of electric vehicles, and the adaptability is poor

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