Lithium-ion Cell-measurement Instruments Offer 48 24-bit-resolution Inputs

摘要

Data Translation has announced its Voltpoint series of voltage-measurement instruments for lithium-ion cell-by-cell determination. Each Voltpoint is a stand-alone box offering 48 24-bit-resolution inputs over a sampling range of ±100V,rneach with its own sigma-delta ADC for direct connection to a PC through USB or Ethernet. The LXI (LAN-extensions-for-instrumentation)-compatible instruments can make high-voltage, high-precision battery-stack and cell-balance measurements in commercial andrnmilitary hybrid-vehicle applications. They accept direct voltage inputs of any value in the range of ± 100V from a single cell or from a series of stacked cells. In addition, the instruments can make motor-shunt measurements. Each of the 48 input channels offers 1000V channel-to-channel galvanic isolation. Maximum error is 3 mV for any input range.rnChannels operate simultaneously at throughput rates as high as 10 Hz per channel. The instruments feature 16 optoisolated digital-l/O lines-eight input lines and eight output lines-for monitoring and driving relays. Voltpoint instruments feature eight isolated digital-input lines that operate from 3 to 28V dc, with a maximum switching time of 2 msec. The instruments can directly drive relays using eight isolated digital-output lines.