Improved cell voltage detection for fuel cells and batteries

October 14, 2018 //By Christoph Hammerschmidt
Improved cell voltage detection for fuel cells and batteries
The latest generation of cell voltage acquisition systems for fuel cells, batteries and electrolysis applications from Smart Testsolutions features an extended temperature range, significantly reduced power consumption and higher measurement accuracy. Another highlight is the modern, web-based user interface.

The CVM modules of the fifth generation can be used at temperatures of up to 105 degrees, compared to 85 degrees for earlier versions. The input power voltage has been from 5 volts to now 4.5 to 32 volts with the new modules. They can thus be operated directly from a 12- or 24-volt network.

Smart Testsolutions has also revised the software for the fuel cell monitoring systems and implemented various improvements. For example, a new, parameterizable algorithm for cable break detection has been installed, which makes the detection more reliable. The sensitivity of the cable break detection is freely adjustable so that the system can be adapted to the ambient conditions of the customer application.

Averaging in the module is also configurable in the fifth generation. In addition, a system shutdown has now also been implemented for CANonly systems without MCM-IntelliProbe master module if a temperature limit value is exceeded. The extended software functionality is also available to customers of the CVM generation G4 via a software upgrade.

Externally, the compact measuring modules hardly show the far-reaching improvements. However, the plugs have been moved slightly. They are therefore not plug compatible with the fourth generation CVM modules. This is to prevent the manufacturer from accidentally combining modules from different generations.

A module that can monitor 10 channels and thus 10 cells of a fuel cell, for example, measures only 100 x 30 x 10.5 mm and can therefore be used both in stationary applications such as test benches and mobile in confined spaces - for example in cars or aircraft. If more than 10 individual cells are to be monitored, several modules can be plugged together without extra wiring.

A measuring system consists of up to 42 ten-channel voltage acquisition modules with which up to 420 channels can be monitored simultaneously, a link module for connecting the supply and communication lines and a bus termination module. All measuring channels

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