A Battery Test System is used to test and optimise electrochemical energy storage devices such as batteries. Battery Test Systems make it possible to document the change in the block voltage of batteries over the entire course of capacity tests. Behind these changes in the block voltage is a natural phenomenon that can be observed in particular at the beginning (so-called voltage sag) and at the end of the discharge process of batteries. In addition, a Battery Test System can also read out further data that provide comprehensive information about the condition and function of the battery. These are charge and discharge current, temperature, cell voltage and total battery voltage.

A Breakout Box is an electronic measuring instrument for monitoring and rerouting the signal transmission between at least two devices. As intermediate switching devices, breakout boxes are simply connected directly between the cable connection and the device.

The advantage of a breakout box is, among other things, the ability to integrate non-standard devices into a standard environment. Furthermore, breakout boxes enable communication between data terminal equipment (DTE) or data transmission equipment (DCE).


A cell voltage monitor is a device for real time monitoring of the cell voltage of lithium-ion batteries, fuel cells, electrolyzers and other energy storages. Relevant measured data are especially aging, stack-inhomogeneity and water content of fuel cells. Dependent on the applied cell voltage monitor the cell temperature can also be determined, which is practical particularly for fuel cell monitoring. By means of its multi-channel construction the cell voltage monitor can control up to several thousands of cell units simultaneously.

CVM, or cell voltage monitoring, is a real-time data acquisition system that can be used to test and monitor the cell voltage of Li-ion batteries, fuel cells, electrolysers and other energy storage devices. Relevant measurement data for the CVM include, in particular, ageing, stack inhomogeneity and the water content of fuel cell systems. Depending on the measuring module used, the CVM also allows statements to be made about the cell temperature, which is particularly recommended when monitoring fuel cells.

CVM software is designed to facilitate the process of data processing and analysis of Cell Voltage Monitoring (CVM) systems. In this way, the CVM software helps to save considerable time and costs. The CVM is a real-time data acquisition system used to check the cell voltage of fuel cells, Li-ion batteries and electrolyzers in real time. After the CVM measurement modules have connected to a computer system via CAN bus, LabView or via USB, the further processing of the measurement data can begin with CVM software. The measurement data has already been digitally prepared and pre-processed by a CVM measurement controller.


In duty cycle measurements, the duty cycle of pulses is measured. Each pulse consists of a pulse top and a pulse bottom. The duty cycle measurement now determines the ratio of the two quantities, which can also be expressed by the ratio of pulse duration to period duration.


The value of many physical quantities is determined via frequency measurement, which is of essential importance for electrical measurement technology. This applies, for example, to speed, length and velocity measurement as well as to communication technology. The measuring instruments used for frequency measurement can measure frequencies of sinusoidal alternating voltages as well as rectangular signals (tilt oscillations, pulse trains).


An inductive speed sensor is a non-contact measuring method for the continuous detection of speeds.


A measurement system comprises the totality of all elements that directly or indirectly influence the determination of the value of the physical quantity to be measured. In detail, these are: the actual object to be measured, the measuring equipment or devices used, the person(s) measuring, the environment and the methods of measurement and evaluation applied.


PWM is a technical type of modulation. PWM is an abbreviation for the method of pulse width modulation, in which - at a fixed basic frequency - the on and off time of a square wave signal can be varied. The signal of a technical variable generated by PWM then alternates between two values. Frequency and duty cycle (ratio of switch-on and switch-off time of the square-wave signal, also called duty cycle) are variably adjustable with PWM. If the frequency is constant, the PWM modulates a square-wave pulse.

The task of a PWM signal generator is to produce a PWM signal, whereby frequency, duty cycle and amplitude are variably adjustable. Here, the abbreviation PWM stands for pulse width modulation, a type of modulation that alternates between two values. At a constant frequency, the PWM signal generator produces a square-wave pulse.


Signal simulation is commonly used in automobile development to simulate the signal of a digital active wheel speed sensor. With these simulated sensor data various electronic control units, which can digitally process this sensor signal, can be tested either in an existing test system or at test bench. Especially the error simulation, which most signal simulation devices provide, has great importance for the development of modern antilock braking systems (ABS).


A test system is a complex network of several measuring and simulation devices that are used to test the behaviour of a technical apparatus or process under certain boundary conditions.