Battery pack equalization method

An equalization method and technology of battery packs, applied in charge equalization circuits, arrangement of multiple synchronous batteries, battery circuit devices, etc., can solve the problems of occupying the memory of the battery management module, reducing the equalization processing speed, and not considering the change of battery life, etc.

Active Publication Date: 2019-03-08
JIANGSU ZENIO NEW ENERGY BATTERY TECH CO LTD
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Problems solved by technology

The above-mentioned schemes have achieved voltage balance between batteries to a certain extent, but these schemes have at least the following defects: first, the battery life changes before and after equalization are not considered, resulting in poor equalization effect; second, real-time monitoring of the battery pack is required The voltage and current of the battery greatly occupy the memory of the battery management module and reduce the speed of equalization processing.

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  • Battery pack equalization method

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Embodiment Construction

[0033] Certain terms are used, for example, in the description and claims to refer to particular components. Those skilled in the art should understand that hardware manufacturers may use different terms to refer to the same component. The specification and claims do not use the difference in name as a way to distinguish components, but use the difference in function of components as a criterion for distinguishing. As mentioned throughout the specification and claims, "comprising" is an open term, so it should be interpreted as "including but not limited to". "Approximately" means that within an acceptable error range, those skilled in the art can solve technical problems within a certain error range and basically achieve technical effects.

[0034] In the description of the present invention, it should be understood that the orientation or positional relationship indicated by the terms "upper", "lower", "front", "rear", "left", "right", horizontal" etc. are based on the draw...

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Abstract

The invention discloses a battery pack equalization method. The method comprises the following steps of first, acquiring available capacity value of a battery pack in real time and sending the available capacity value to a battery life estimation module by a battery management system; second, processing received available capacity value by the battery life estimation module, so as to obtain real-time battery life value, and storing the real-time battery life value in the battery management system; third, screening each battery of the battery pack by an equalization processing module, and equalizing a single battery not meeting requirements; fourth, equalizing a single battery according to preset equalization amount by the equalization processing module within equalization time, after equalization, closing the equalization module; and fifth, obtaining a battery service life value after equalization, and comparing the battery service life value after equalization with the battery servicelife value before equalization, and then determining whether the battery pack needs equalization again. The method can detect battery service life in real time, and prolongs battery service life by equalizing the battery.

Description

technical field [0001] The invention belongs to the technical field of battery management, and in particular relates to a method for equalizing a battery pack. Background technique [0002] Nowadays, all countries are vigorously developing green and high-efficiency secondary batteries. As a new type of secondary battery, lithium-ion batteries have the advantages of high energy density and power density, high working voltage, light weight, small size, long cycle life, good safety, and environmental protection. They are widely used in portable appliances, electric tools, large Energy storage, electric transportation power supply and other aspects have broad application prospects. However, during the use of the battery, due to the difference in the output voltage of the battery caused by the industrial production process, the output power of the battery is uneven, and during the use, with the increase of the number of charge and discharge, this imbalance will become more and m...

Claims

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Application Information

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IPC IPC(8): H02J7/00
CPCH02J7/0014
Inventor 胡良刘晨南
Owner JIANGSU ZENIO NEW ENERGY BATTERY TECH CO LTD
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