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Design Notes

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  Simple Calibration Circuit Maximizes Accuracy in Li-Ion Battery Management Systems &mdash DN471
  PDF, 80 Кб, Файл опубликован: 17 авг 2009
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  Simple Calibration Circuit Maximizes Accuracy in Li-Ion Battery
  Management Systems
  Design Note 471
  Jon Munson
  Introduction
  In Li-Ion battery systems it is important to match the
  charge condition of each cell to maximize pack performance and longevity. Cell life improves by avoiding both
  deep discharge and overcharge, so typical systems strive
  for operation between 20% and 80% states of charge
  (SOC). Detection and correction of charge imbalances
  assures that all cells track within the desired SOC window,
  preventing premature aging of some cells that could
  compromise the entire pack capacity. Highly accurate
  measurements are required to determine SOC with Li-Ion
  cells due to their exceptionally flat discharge characteristics, particularly with the lower voltage chemistries (see
  example in Figure 1).
  4.0 1
  2 LTC6802IG-2
  35
  GPIO1
  VREG
  VTEMP1
  V– 1M …

Статьи

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  Battery Stack Monitor Extends Life of Li-Ion Batteries in Hybrid Electric Vehicles &mdash LT Journal
  PDF, 665 Кб, Файл опубликован: 1 мар 2009
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  LINEAR TECHNOLOGY MARCH 2009 IN THIS ISSUE…
  COVER ARTICLE
  Battery Stack Monitor
  Extends Life of Li-Ion Batteries
  in Hybrid Electric Vehicles.1
  Michael Kultgen and Jon Munson Linear in the News….2
  DESIGN FEATURES
  DC/DC Converter, Capacitor Charger
  Takes Inputs from 4.75V to 400V.9 VOLUME XIX NUMBER 1 Battery Stack Monitor
  Extends Life of Li-Ion
  Batteries in Hybrid
  Electric Vehicles
  by Michael Kultgen and Jon Munson Robert Milliken and Peter Liu How to Choose a Voltage Reference.14
  Brendan Whelan 1.2A Monolithic Buck Regulator
  Shrinks Supply Size and Cost with
  Programmable Output Current Limit
  .20
  Tom Sheehan Boost Converters for Keep-Alive Circuits
  Draw Only 8.5ОјA of Quiescent Current
  .22
  Xiaohua Su Industrial/Automotive Step-Down
  Regulator Accepts 3.6V to 36V and
  Includes Power-On Reset and Watchdog …

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Классификация производителя

• Power Management > Battery Management > Multicell Battery Stack Monitor