DC1894B: 12-Cell Battery Monitor, 11 ~ 55V in

Demonstration circuit 1894B is a daisy-chainable isoSPI battery-stack monitor featuring the LTC6804-1. These boards can be linked through a 2-wire isolated serial interface to monitor any number of cells on a stack.

Communication to a PC uses a DC590 USB interface board. A control program for up to ten stacked boards has a Graphical User Interface (GUI) to implement the device command set.

Multiple DC1894B can be daisy-chained using RJ45 terminated Ethernet patch cables.

The LTC6804 is a 3rd generation multicell battery stack monitor that measures up to 12 series connected battery cells with a total measurement error of less than 1.2mV. The cell measurement range of 0V to 5V makes the LTC6804 suitable for most battery chemistries. All 12 cell voltages can be captured in 290μs, and lower data acquisition rates can be selected for high noise reduction.