Kontron MARS Smart Battery Kit - Manual (Page 8)

MARS User´s Guide
the 5 way Smart Battery connecting lead of Moltech – part number: 629010). In the Appendices
you can find a list of possible Smart Batteries.
The modular setup of SBS MARS is a guideline for the devoloper and the user to configure and set
up the System, as necessary. (fig. 2 and fig. 3)
The buck-boost converter at the input side controls the input voltage to 19V, to get a sufficient
high charging voltage, even when the batteries needs voltages up to 17V. If input voltages of 19V
to 28V are used, this device is not necessary. Then it can be omitted or bypassed.
The buck-boost converter at the output side is used, when there is a Smart Battery which voltage
could drop lower than 12V. If there are only batteries with higher voltages than 12V then the dual
buck converter is enough. In this case the buck-boost converter at the output side can be omitted
or bypassed.
The SBS MARS acts like an ATX power supply. In Standby mode only the 5V SBY are supplied.
Parallel discharging of both Smart Batteries allows, due to reduced temperatures a longer
powersupply than in serial mode. The higher voltages lead to lower currents and that to less heat
which gives the battery longer lifetime. This effect is like an extension of the size of the Smart
Battery System. To use this effect both batteries need to have the same chemistry and the same
cell configuration. Then you could charge both batteries in parallel which leads to a faster charging
procedure.
The SBS MARS is able to choose automatically the best suited powersupply for the system.
A current supervision is implemented at each IC. As the output current of each converter is
controlled, is the charging current, too. Additionally a hardware fuse for each battery to give the
user the highest amount of safety.
The variable voltage input is not protected by hardware against overcurrent. This should be done in
the powersupply.
The connection to the SM-Bus of the baseboard is done by the feature connector which could be
found on most of KONTRON’s backplanes with the same pinning. The SM-bus enables the user to
get information from the Smart Battery Manager and from the Smart Batteries. (Please refer to
Appendix B: Interface to Operating Systems.)
Introduction
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