Saft evolion Technical Manual

Also see for evolion: Installation and operation instruction sheet Installation and operating instructions

Saft evolion Technical Manual Manual pdf 9 page image

10Figure 3. Schematic view of the electronic switch (mosfets) in the Evolion.# Application parameter Description1 Load limitsEach module can provide and accept up to 44 A of discharge/charge current. To avoid damaging theBMST power board, the maximum total system discharge load should be below 130 Amps. If the totalsystem discharge load exceeds 130 Amps, regardless of the number of parallel Evolion modules, it isnecessary to implement an external protection device like a Saft specified breaker (per Evolion or pairof Evolions) and/or an electronically controlled contactor(s) piloted by a signal by measured Evolionparameters (via RS485 or external measurement). See details in the chapter Massive paralleling.2 Re-charge limitsThe Evolion uses an automatically actuated charge regulated mode, so normally sized rectifier outputsare compatible with Evolion operation. If a minimum re-charge time is needed, it is necessary to controlthe charge output to avoid charge regulated mode and possible damage to the BMST power board. Therated output of the charger should be 60 V maximum. A higher rated output allow a high current or highvoltage 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/alarmsThe transmission protocol is RS485. The communication protocol is Modbus. Application controllerscan communicate with the Evolion or parallel connected Evolions to receive information or command theEvolion’s state. A dry contact signal is also actuated (normally closed) when customer specified alarmsare exceeded or the module power is OFF.# Switch Description1 Discharge Mosfet driver for discharge acted on by BMST microcontroller2 Redundant discharge Mosfet driver for discharge with delay time acted on by the redundant hardware safety chain3 Fast charge Mosfet driver for charge acted on by the BMST microcontroller4 Redundant charge Mosfet driver for charge with time delay acted on by the redundant hardware safety chain5 Slow charge Mosfet driver for regulated charge acted on by the BMST microcontroller4.2 The electronic switch (mosfets)The Evolion operates with 6 modes. The modes are invoked by controlling the state of anelectronic switch circuit (combined withdiodes). The switch circuit is located on the BMST power board. The electronic switches are acted on by the BMST microcontrolleror the redundant hardware safety chain. The electronic switch state depends on the measured value of the single module’s statevariables, 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.