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Inductor-Based Active Balancing of Batteries and Other Power Sources

An inductor and power supply technology, applied in the field of active balancing based on inductors, can solve the problems of shortening battery life and battery cell energy loss, etc.

Active Publication Date: 2017-06-13
TEXAS INSTR INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, since the power is dissipated using resistors, this can result in a large loss of energy from the battery cell, shortening the battery's lifespan

Method used

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  • Inductor-Based Active Balancing of Batteries and Other Power Sources
  • Inductor-Based Active Balancing of Batteries and Other Power Sources
  • Inductor-Based Active Balancing of Batteries and Other Power Sources

Examples

Experimental program
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Embodiment Construction

[0015] figure 1 An exemplary inductor-based active balancing system 100 for batteries and other power sources according to the present disclosure is shown.

[0016] Such as figure 1 As shown, system 100 includes or is coupled to a plurality of series-connected power supplies 102a-102g. Each power source 102a-102g represents any suitable power source, such as a single battery cell. In a particular embodiment, each power supply 102a-102g represents a single battery cell having a nominal voltage of 3.2V. However, each power source 102a-102g may also represent a plurality of battery cells, a battery module, a plurality of battery modules, or other collections of battery cells. Any other type of power source can also be used, such as supercapacitors, fuel cells, and solar cells. Note also that any number of power supplies can be used here.

[0017] A plurality of switches 104a-104h are coupled to power sources 102a-102g. Switches 104a - 104h are opened and closed to transfer ...

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PUM

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Abstract

The system includes a plurality of power supplies (102a-102g) connected in series and an active balancing circuit. The active balancing circuit includes an LC resonant circuit (106) and a plurality of switches (104a-104h) configured to selectively couple different ones of the power sources to the LC resonant circuit. The LC resonant circuit includes an inductor (108), a capacitor (112) and an additional switch (114). Inductors are configured to store energy to be transferred between two or more power sources. The additional switch is configured to selectively create a resonance between the inductor and capacitor so as to reverse the direction of current flow through the inductor. The active balancing circuit is capable of transferring energy between individual power sources or between groups of power sources.

Description

technical field [0001] The present invention relates generally to power balancing systems and, more particularly, to inductor-based active balancing of batteries and other power sources. Background technique [0002] Modern batteries often include multiple battery cells connected in series, and multiple batteries can be connected in series to form a battery module. Unfortunately, the actual output voltage provided by each individual cell in a battery or each battery in a battery module will vary slightly. This can be caused by any number of factors such as manufacturing variations, temperature variations or other internal or external factors. This can cause problems during the charging and discharging of the cells or batteries. In some systems, a voltage sensing circuit can be used to determine the output voltage of each cell or battery, and a voltage balancing system can be used to compensate for variations in the output voltage. [0003] Consider battery cells connected...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02J7/04H01M10/44
CPCH01M10/441H01M2010/4271H02J7/0016Y02E60/10
Inventor Q·刘
Owner TEXAS INSTR INC