Online capacity optimization device for electric vehicle storage battery pack

Abstract

The invention discloses an online capacity optimization device for an electric vehicle storage battery pack. The online capacity optimization device conducts capacity optimization control over the storage battery pack while the storage battery pack supplies power to a motor of an electric vehicle. The online capacity optimization device comprises a collection module, a storage module, a calculation module, an optimization control module, a test module, a main control unit, a touch control display screen and an upper computer. The main control unit obtains the maximum value, the minimum value and the average value among the maximum capacity values of all single batteries and judges whether capacity optimization control over the battery pack needs to be started or not; and the test module is used for detecting and judging whether the single battery with the minimum maximum capacity value can be first fully charged and first thoroughly discharged or not in charging and discharging work, and if yes, battery pack capacity optimization is completed. According to the online capacity optimization device, charging and discharging control is conducted over the capacities of the single batteries to enable the single battery with the minimum maximum capacity value to be first fully charged and first thoroughly discharged in charging and discharging work, and therefore battery pack capacity maximization is achieved.

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 cells in series. Since each single cell cannot be completely consistent during production and use, as time accumulates, each single cell will age and attenuate to varying degrees. The variation between the cells will increase, which will have an impact on the overall usable capacity of the battery pack and will also reduce the 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. Now the commonly used battery pack capacity control metho...

AI Technical Summary

Problems solved by technology

The battery pack is composed of multiple single cells in series. Since each single cell cannot be completely consistent during production and use, as time accumulates, each single cell will age and attenuate to varying degrees. The variation between the cells will become larger and this will have an impact on the overall usable capacity of the battery pack and will also reduce the 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. Now the commonly used battery pack capacity control method is mostly battery pack capacity balance, 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 cells, cannot effectively increase the available capacity of the battery pack, and cannot guarantee the stable power supply of the battery pack.

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