In order to provide enough power for special applications, the advanced version of the well-known BCS Compact modules can now deliver up to 7.5 A at 5 V cell voltage. The previous 6 A can also be achieved at 8 V as before. In addition, the new model has proven functions such as the fault simulation of a cable break, short circuit of a cell, the polarity changes of a cell but also the usual high precision of 2 mA and 0.5 mV for both measurement and generation of the current and voltage values.

However, the above-mentioned fault simulation for each cell represents only a small part of the challenges of a BMS. That is why comemso is constantly expanding the possibilities to comprehensively test the BMS hardware and software. During alternating current (AC) charging, for example, the vehicle’s on-board charger can expose the BMS to electromagnetic interference. On the one hand, the BMS can filter this interference. On the other hand, the BMS should also be able to monitor the dynamic cell behaviour, which would be overlooked if the filtering is too strong. In order to optimise the filtering accordingly, comemso has developed the new software feature "Voltage Oscillation". Here, a quasi-sine voltage with an amplitude, individually adjustable for each cell, of up to 35 mV (70 mV_pp) and a frequency of 1 to 1000 Hz is modelled on the DC voltage to emulate an interference signal. Also special: this new feature can be updated to delivered BCS Gen. 8 and even on request to Gen. 7, which is covered by the software maintenance at no additional cost.

And if this shouldn’t be enough, just stay tuned for the near future with comemso.