Battery management system and control method thereof

Abstract

The invention discloses a battery management system and a control method thereof. The battery management system comprises a battery parameter detection module, a central processing module, a working condition forecast module and an energy control module, wherein the battery parameter detection module is used for acquiring a battery parameter in real time and outputting the battery parameter, the central processing module is used for acquiring the battery parameter and calculating residual capacity of a battery according to the battery parameter, the working condition forecast module is used for acquiring and storing working condition data of the whole controller, acquiring and storing the working condition data of the battery by the central processing module, forecasting the next-step working condition of the vehicle according to current battery working condition data and the vehicle working condition data and the battery working condition data of most-recently vehicle circulation working condition and by combining the whole controller and forecasting the next-step working condition of the battery under a current temperature and current residual capacity of the battery, and the energy control module is used for controlling input or output energy of the battery according to the current battery working condition data, the next-step working condition of the vehicle and the next-step working condition of the battery. With the battery management system disclosed by the embodiment of the invention, the energy utilization ratio of the battery is effectively improved on the premiseof no influence on a healthy condition of the battery.

Description

technical field [0001] Embodiments of the present invention relate to new energy vehicle battery control technologies, and in particular to a battery management system and a control method thereof. Background technique [0002] In new energy vehicles, each battery remaining capacity (State of Charge, SOC) of the power battery pack at a specific temperature corresponds to a specific operating range. The battery management system generally provides the peak current and continuous current data of the battery according to the current SOC and temperature, and the vehicle controller will combine these data to control the charging and discharging of the battery. [0003] In the prior art, it usually judges the current SOC value according to some parameters determined by the battery management system, and then judges the current SOC value according to a certain algorithm, and sends out the maximum and minimum working range of the battery under the SOC at the current temperature, whe...

AI Technical Summary

Problems solved by technology

[0004] However, the control strategy in the prior art has a low energy utilization efficiency for the battery, and it can even be said that a part of the energy available to the battery is sacrificed, and this part of energy can be used for the entire vehicle without affecting the battery life. Some transient or short-duration operating characteristics of

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