Saft evolion, Техническое руководство

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Figure 3. Schematic view of the electronic switch (mosfets) in the Evolion.
# Application parameter Description
1 Load limits
Each module can provide and accept up to 44 A of discharge/charge current. To avoid damaging the
BMST power board, the maximum total system discharge load should be below 130 Amps. If the total
system discharge load exceeds 130 Amps, regardless of the number of parallel Evolion modules, it is
necessary to implement an external protection device like a Saft specified breaker (per Evolion or pair
of Evolions) and/or an electronically controlled contactor(s) piloted by a signal by measured Evolion
parameters (via RS485 or external measurement). See details in the chapter Massive paralleling.
2
Re-charge limits
The Evolion uses an automatically actuated charge regulated mode, so normally sized rectifier outputs
are compatible with Evolion operation. If a minimum re-charge time is needed, it is necessary to control
the charge output to avoid charge regulated mode and possible damage to the BMST power board. The
rated output of the charger should be 60 V maximum. A higher rated output allow a high current or high
voltage transients, for a short time, even if the set point is lower than 60 V. In charge regulated mode,
the typical re-charge time can be up to 24 hours. See details in the chapter Massive paralleling.
3
Communication/
alarms
The transmission protocol is RS485. The communication protocol is Modbus. Application controllers
can communicate with the Evolion or parallel connected Evolions to receive information or command the
Evolion’s state. A dry contact signal is also actuated (normally closed) when customer specified alarms
are exceeded or the module power is OFF.
# Switch Description
1
Discharge Mosfet driver for discharge acted on by BMST microcontroller
2
Redundant discharge Mosfet driver for discharge with delay time acted on by the redundant hardware safety chain
3
Fast charge Mosfet driver for charge acted on by the BMST microcontroller
4
Redundant charge Mosfet driver for charge with time delay acted on by the redundant hardware safety chain
5
Slow charge Mosfet driver for regulated charge acted on by the BMST microcontroller
4.2 The electronic switch (mosfets)
The Evolion operates with 6 modes. The modes are invoked by controlling the state of an
electronic switch circuit (combined with
diodes). The switch circuit is located on the BMST power board. The electronic switches are acted on by the BMST microcontroller
or the redundant hardware safety chain. The electronic switch state depends on the measured value of the single module’s state
variables, i.e., voltage, temperature and current. See the Figure 3 below for a schematic overview of the electronic switch (mosfets)
located on the BMST power board.