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Virtual cell method for battery management

A battery cell, virtual cell technology, applied in the arrangement of multiple synchronous batteries, electrical components, battery circuit devices, etc., can solve problems such as accelerated battery degradation

Active Publication Date: 2015-05-13
THE BOEING CO
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This excess heat can lead to accelerated degradation of the battery

Method used

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  • Virtual cell method for battery management
  • Virtual cell method for battery management
  • Virtual cell method for battery management

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Embodiment Construction

[0027] The methods and apparatus disclosed herein provide an operable operating system for a virtual cell approach to battery management. Specifically, the system employs a voltage controller for each battery layer and a voltage battery management (VCM) controller for virtual battery cells.

[0028] The present invention teaches an intelligent battery management system based on a virtual cell approach to perform: 1) real-time detection of battery cell degradation and fault status, 2) battery cell health and fault management, and 3) battery cell lifetime management. This system integration architecture allows the disclosed system to incorporate any charging / discharging protocol suitable for a specific battery chemistry. Virtual cells provide the means to sense and determine the state of charge and state of health of battery cells. Virtual cells also provide the means to actively manage the battery system based on the health of the cells by sharing the current load and by distr...

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Abstract

The present disclosure provides a system, method, and apparatus for battery management. The disclosed method involves current balancing through sinking and / or sourcing current, by at least one virtual cell, for battery cells in a battery pack based on available current and capacity of the battery cells. In one or more embodiments, at least one virtual cell is capable to sink and / or source current for at least one degraded battery cell or at least one dead battery cell.

Description

technical field [0001] The present invention relates to battery management. In particular, the invention relates to a virtual cell approach for battery management. Background technique [0002] Currently, a typical conventional battery pack contains arrays of battery cells connected together in parallel and in series. Ideally, these battery cells have the same internal properties (ie, various overpotentials of electrodes and separators) and external properties (ie, voltage and discharge capacity). However, this is actually inaccurate due to differences in cell defects and varying levels of degradation of cells due to manufacturing, storage, shipping, and handling processes. A defective or degraded battery cell has a higher overpotential (ie externally presented as a higher internal resistance) than other battery cells connected in parallel to the battery cell. A defective or degraded battery cell tends to generate more heat, thus causing itself and its neighbors to overhe...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02J7/00H02J7/02
CPCH02J7/0016H02J7/00
Inventor L·高S·刘G·罗
Owner THE BOEING CO