The solution is aimed at addressing the increasing trend toward vehicle electrification and the management of the lithium-ion battery packs that power them. Filled with hundreds or even thousands of individual battery cells, the battery packs require precise management of the voltages and temperatures of these battery cells for safe, efficient, and long-lasting operation, says the company.
A wireless BMS solution provides many benefits:
- Reduces weight by reducing wires and connectors
- Reduces cost by eliminating inter-module isolation components
- Reduces manufacturing complexity and manufacturing time
- Increases flexibility of pack shape
The CES demo will compare a wired and wireless BMS solution based on an ISM-band radio. The wireless architecture features an RF gateway client that acts as a central controller that communicates with all secondary nodes.
Communication between the gateway and secondary nodes is encrypted and, with a STAR topology, data delivery is robust. Eliminating wiring and related components can also enhance vehicle efficiency and extend driving range.
Each BMS secondary node communicates data wirelessly back to the gateway. The secondary nodes also each interface to a MAX17853 14-channel, high-voltage ASIL D battery monitor via SPI.
In a normal application, says the company, the gateway device would communicate to a host microprocessor to provide measurement and diagnostic information. In the demo, the gateway communicates to a host PC to display measurement information.
The demo as well as tech experts will be inside Maxim's private automotive demo room at CES.