S-Box
The requirements for functional safety demand a safety level of at least ASIL C for the battery shutdown. The Futavis S-Box is developed according to international standards (including ISO 26262 or IEC 60730 as well as LV 123 and LV 124) and can therefore withstand the required safety requirements.
In addition, the modular Futavis S-Box as a series product is perfectly matched to our BMS and, thanks to its small and compact design, can be used in a wide range of applications. The modular development approach also allows the S-Box to be used for batteries of up to 1000 V DC. Whereby the number of modules and cells can be freely scaled.
The S-Box provides the HV and LV interface between the battery modules and the surrounding system. It is directly linked to the BMS, which is the monitoring unit of the battery and thus gives the S-Box the appropriate connection and disconnection commands. The sensor system of the S-Box consists of 2 current sensors, a Hall and a shunt sensor, and 2 voltage measurements. The 3 contactors are designed for the high currents and voltages and ensure that disconnection of the battery is possible even under current.
The contactors as well as the included precharging circuit are controlled by the BMS, whereas current and voltage measurements are read in by the BMS via taps and current sensors.
