A method for equalizing a battery pack

A balancing method and battery pack technology, applied in charge balancing circuits, arrangement of multiple synchronous batteries, battery circuit devices, etc., can solve problems such as poor balancing effect, failure to consider changes in battery life, and memory usage of battery management modules

Active Publication Date: 2021-10-15
JIANGSU ZENIO NEW ENERGY BATTERY TECH CO LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

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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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  • A method for equalizing a battery pack

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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 method for equalizing a battery pack, which comprises the following steps: step 1, the battery management system obtains the available capacity value of the battery pack in real time, and sends it to the battery life estimation module; step 2, the battery life estimation module evaluates the received available capacity The capacity value is processed to obtain the real-time battery life value and stored in the battery management system; step 3, the equalization processing module screens each battery in the battery pack, and performs equalization processing on a single battery that does not meet the requirements; step 4, equalization The processing module equalizes a single battery according to the preset equalization amount within the equalization time, and after the equalization ends, close the equalization module; Step 5, obtain the battery life value after equalization, and compare it with the battery life value before equalization, and then Determine whether the battery pack needs to be balanced next time. The invention can detect the battery life in real time, and improves the battery life through 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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Patent Type & Authority Patents(China)
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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