An online capacity optimization device for battery packs of electric vehicles

Abstract

The invention discloses an online capacity optimization device for battery packs of electric vehicles. The online capacity optimization device performs capacity optimization control of the battery packs while the battery packs are supplying power to electric motors of electric vehicles. Control module, test module, main control unit, touch display screen and upper computer; the main control unit obtains the maximum value, minimum value and average value of the maximum capacity values ​​of each single battery, and judges whether the battery pack needs to enable capacity optimization control ; The test module is used to detect and judge whether the single battery with the smallest maximum capacity value can be fully charged and fully discharged first during the charging and discharging work. If so, the battery pack capacity optimization is completed. The invention controls the charge and discharge of the capacity of the single battery so that the single battery with the smallest maximum capacity value can be fully charged and fully discharged first in the charging and discharging work, thereby realizing the maximum capacity of the battery pack.

Description

technical field [0001] The invention relates to the technical field of battery capacity control, in particular to an online capacity optimization device for battery packs of electric vehicles. Background technique [0002] The battery pack is the power source of the electric vehicle, and the continuous and stable power supply of the battery pack is very important for the electric vehicle. The battery pack is composed of multiple single batteries connected in series. Since each single battery cannot be completely consistent during production and use, as time accumulates, each single battery will age and attenuate to varying degrees. The increasing variance between the batteries will have an impact on the overall usable capacity of the battery pack and will also reduce the service life of the battery pack. [0003] Therefore, during the use of the battery pack, it is necessary to control the capacity of the battery pack in a timely manner. The commonly used method for control...

AI Technical Summary

Problems solved by technology

The battery pack is composed of multiple single batteries connected in series. Since each single battery cannot be completely consistent during production and use, as time accumulates, each single battery will age and attenuate to varying degrees. The difference between batteries will become larger and larger, which will affect the overall usable capacity of the battery pack and reduce the service life of the battery pack

[0003] Therefore, during the use of the battery pack, it is necessary to control the capacity of the battery pack in a timely manner. The commonly used method for controlling the capacity of the battery pack is mostly the capacity balance of the battery pack, so that the capacity of each single battery in the battery pack tends to be consistent. However, many equalization schemes cannot fundamentally solve the inconsistency problem between single batteries, cannot effectively improve the available capacity of the battery pack, and cannot guarantee the stable power supply of the battery pack

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