31 Oct '12, 12pm

Linear adds high precision to stacked Li-ion battery monitor

Linear Technology has introduced a high voltage battery monitor for measuring stacked Li-ion cells to a new level of precision. Designed for electric vehicles, but also used in stacked-battery systems used in renewable energy systems and back-up power, the latest LTC6804 battery monitor can measure up to 12 series connected battery cells at voltages up to 4.2V with 16 bit resolution and better than 0.04% accuracy. Previous generations of the chip (LTC6802/3) incorporated a bandgap voltage reference, for this new device Linear has designed in a buried Zener voltage reference similar to references used in precision instrumentation. This gives the monitor the higher level of precision and tolerance to temperature and aging. "This level of accuracy is important because the discharge characteristics of a Li-ion cell are very flat and it is necessary to measure very small voltag...

Full article: http://www.electronicsweekly.com/Articles/31/10/2012/5489...

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