Lithium-ion battery pack managing system and method

Abstract

The invention discloses a lithium-ion battery pack managing system, which comprises a collection module, a micro controller and a balanced management module; the collection module is used for collecting voltage data, current data and temperature data of a single-body lithium-ion battery in the lithium-ion battery pack; the micro controller is used for calculating the charging and discharging times of each single-body lithium-ion battery according to the voltage data and the current data collected by the collection module, and the state of charge (SOC) of each single-body lithium-ion battery is estimated according to the voltage data, the current data and the temperature data as well as the charging and discharging times; and the balanced management module is used for balancing the electric quantity of each single-body lithium-ion battery in the lithium-ion battery pack. By utilizing the lithium-ion battery pack managing system, the phenomenon that the single-body lithium-ion battery stays at an over-charging state or at an over-discharging state can be avoided, the application efficiency of the lithium-ion battery pack is improved, and the service life of the lithium-ion battery pack is prolonged.

Description

technical field [0001] The present application relates to the field of lithium-ion batteries, in particular to a management system and method for a lithium-ion battery pack. Background technique [0002] With the depletion of traditional energy sources and the increasingly serious environmental pollution, the state has proposed policies for energy conservation, emission reduction, and development of a low-carbon economy. Lithium-ion batteries have high energy density, good safety, long life, and Memory effect, environmental protection and other characteristics have been widely used. During the use of lithium-ion batteries, in order to obtain high power and large capacity, lithium-ion batteries need to be connected in series and parallel to form a lithium-ion battery pack. [0003] Due to the limitation of the manufacturing level of lithium-ion batteries, the performance of single lithium-ion batteries cannot be completely consistent, and the performance of lithium-ion batte...

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Problems solved by technology

[0003] Due to the limitation of the manufacturing level of lithium-ion batteries, the performance of single lithium-ion batteries cannot be completely consistent, and the performance of lithium-ion battery packs is determined by the performance of single lithium-ion batteries, making lithium-ion battery packs in the process of use In the process, as long as the power of a single lithium-ion battery is insufficient, the lithium-ion battery pack must be charged, which will easily cause other single lithium-ion batteries in the lithium-ion battery pack to be in an overcharged state, resulting in damage to the lithium-ion battery pack. Lithium-ion batteries are used inefficiently and have a shortened service life

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