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3.3 Main functional features
#
Interface feature
Description
1
Cell pack
The series connected cells are configured in a high energy dense cell pack. Each cell is equipped with an
internal current interrupt device. In case the maximum internal pressure or a maximum current level
is exceeded, this device opens the current flow in the series pack. Additionally, each cell is designed to
open and allow abnormally high pressure to vent. This controlled venting minimizes the risk of a flare up
event. Further, each cell is spaced and externally sleeved with an optimal distance in order to prevent
thermal propagation from one cell to another, in the unlikely event of a cell flare up.
2
BMST busbar board
The cell pack is connected with a BMST busbar board. The BMST busbar board is located just under
the top cover and it provides several functions. It is a power supply, a microcontroller, it monitors
cells’ voltage, it measures temperature, it balances cell voltages, it provides redundant monitoring,
it measures network & module voltage, it generates alarms, it provides external communication, it
provides the front panel HMI, heats the cells and measures current.
3
BMST power board
The BMST busbar board interconnects with the BMST power board. It is located just under the front
face and it provides several functions. It is the charge control, the discharge control, includes a mosfet
test and provides the overcurrent protection. It mounts the module power terminals, BMST reset button
and replaceable fuse. The front cover is removable to access the reset button and the replaceable fuse.
Refer to the figure and table below.
#
Front cover feature
Description
1
Power terminals
Power connection to the bus. Use only approved power cables provided by Saft or equivalent (with
continuous current carrying capability of 63 Amps). The maximum torque is 6 N·m (53 in·lbs).
Important: If the power terminals are reverse connected to the rectifier output the battery will not start.
If the ON/OFF button is forced to start the Evolion ON, then alarm 27 and 47 will activate and the Evolion
will be in safe mode.
2
BMST reset button
Push button micro switch is recessed in hole and it is
used to reset the BMST microprocessor in case of a
software trap or an emergency alarm.
3
Replaceable fuse
Power fuse rated at “60 A”. Use only approved fuse provided by Saft or equivalent (supplier: Ferraz
Shawmut, type: 2.5 URGS 17/60). See Figure 4 for fuse limit characteristics. Protects the Evolion
against external short circuit.
3.4 Front cover features
steady
Emergency alarm
steady
Software trap