Ultra-compact, optimized for highest yield
In Electric vVehicles (EVs) efficient cell-to-cell balancing is essential to ensure functional safety during charging and discharging and to optimize battery capacity. Battery management systems (BMS) help to control the power input and output of battery cells, modules, and packs.
In conventional BMS, the communication between the battery components is based on galvanic isolated wired daisy chain communication. Wired harnessing is the current industry standard, but limits the design flexibility and increases the weight of the vehicle and the required manufacturing time.
In a wireless BMS (wBMS), each battery module is connected to a battery management controller (BMC) through a cell monitoring controller (CMC). The link is established either by a robust 2.4 GHz ISM band radio transceiver or by an ultra-wideband (UWB) communication channel, so no wired harnesses are required.
This wireless architecture brings several advantages:
While the wBMS delivers clear benefits for space efficiency, assembly and serviceability, it also introduces new testing challenges that must be addressed:
Automated test system, optimized for production lines
Rohde & Schwarz has developed together with major chipset suppliers ultra-compact automated test solutions for wBMS. With this test setup all the necessary wireless BMS module calibration, receiver, transmitter and DC tests can be conducted fast and executed reliably for verification in the lab and for production tests ensuring highest yield.
The test system consists of the R&S®CMP180Radio Communication Tester, the R&S®ExpressTSVP Universal Test and Measurement Platform, and the R&S®WMT Wireless Automated Testing software framework. Over-the-air testing of the DUT is achieved in an interference free environment using an isolated chamber such as the R&S®CMQ200 shielded box.
Here you can download our uwBMS and wBMS flyer
The solution, built on Rohde & Schwarz’s proven test technology, delivers full coverage testing for every wBMS test case. It provides the speed and scalability needed to move efficiently from validation through to high volume production of even the most complex wBMS modules, whether they use narrow band 2.4 GHz ISM-band or Ultra-Wideband (UWB) communication.
To find out more, please get in contact with your local R&S representative.
