The real-time measurement module CVM allows multichannel voltage measurements of cascaded fuel cells, electrolysers and high-caps.

CVM90-R3 has 90 input channels and allows the measurement of 90 single cells or 180 double cells. Up to 31 modules can be cascaded, so a maximum number of 2790 cells 0r 5580 cells resp. can be monitored.

The measurement module can be directly mounted on a fuel cell stack or it can be integrated into a test stand. The connection to the fuel cell is done via individual cables to input clamp units.

Configuration and result transmission is realised via CAN messages.  For that purpose 2 CAN busses are provided: the first bus (iCAN) transmits the detailed single cell values. It is typically connected to a PC with our CVMVIEW!pro software for visualisation.

The second CAN-bus (eCAN) transmits just condensed information and is typically connected to the fuel cell control unit.

Input voltage range per channel ±1.20V (standard range), scan-time per channel 1ms typ., power supply 7-60VDC, 2x CAN-bus connection compatible to ISO11898 CAN 2.0A (CAN2.0B compatibility). CVMOS!pro operating system for preinstalled.

Casing aluminium anodized, dimensions without brackets 333x30x105 (WxHxD) in mm. Protection

For control and visualisation two Windows programs are available:
CVMLIB!pro lets you control the CVM measurement module via standard programming languages such as C, C++ or LabVIEW.

With CVMVIEW!pro you easily configure the measurement unit(s) and visualise the results with a graphical user interface.

The embedded microcontroller can be reprogrammed and thus allows easy upgrades of functionality..

• 90 measurement channels with input ranges of ±1.2V (single cell measurement) or ±2.8V (double cell measurements; factory set)

• Resolution 12 bit, measurement uncertainty ±0.1% FSR ±6mV

• Calculation of total voltages (stack, system)

• Comparison against 2 limit values in real time

• Detection of contact interruptions

• Masking of cells (e.g. at contact breaks or of known deteriorated cells)

• Sampling time: 1ms/cell, cycle time 80/110ms

• 2 LED displays: operation, error

• Transmission of individual values via first CAN bus („iCAN“), transmission of condensed values via second CAN bus („eCAN“)

• Wide supply voltage range: 7V to 60V

• All inputs electrically isolated, isolation voltage 1000V

• Max. voltage between first and last channel 200V

• Common mode voltage <80V

• Operating temperature range –25°C to +105°C

• Compact aluminium case with protection class IP54

• Dimensions: 334 x 29 x 105mm (90 channels), 276 x 29 x 105mm (60 channels)

• Embedded microcontroller, firmware can be reprogrammed via flash technology