INTERNATIONAL RECTIFIER - THE POWER MANAGEMENT LEADER

Evaira Advanced Energy Management System

Evaira EMS is International Rectifierís advanced-algorithm Energy Management System for heavy duty battery applications. This solution easily scales to both high cell-count battery packs and high current applications, enhancing battery pack performance and extending battery pack service life for electric and hybrid electric platforms in both automotive and heavy industrial market sectors.

Evaira EMS monitors the characteristics of each individual cell while the battery is in operation (discharge mode) and dynamically adjusts its relative loading to match its capacity using a process called Rapid-Bypass. Advanced algorithms are employed, performing SOC calculations based on voltage levels, discharge rates, coulomb counting, and pack SOH, which are compensated for temperature passed through Kalman filters. This capability gives the battery pack designer control to make trade-offs between pack capacity, service life, discharge time, and cost parameters.

Designed to maximize convenience for the system integrator, Evaira EMSís telematic features support remote statistics, including real-time pack voltage, current, ambient temperature, state-of-charge (SOC), state-of-health (SOH), amps expended, and operating time through its integrated external interfaces. The unit has isolated digital I/O expansion lines available for custom applications. These can be used to drive indicators, turn on or off chargers, remote fans, etc. Communications interfaces are also robust, being tolerant to EMI generated in high-current and high-voltage applications.

FEATURES
Discharge and charge monitoring and cutoff
Supports systems up to 700V with unlimited number of modules
Real-time state-of-charge calculation
Statistical logging using non-volatile memory
SAE J1772 control pilot, proximity detection, HV isolation detection circuitry
CANbus 2.0b, Ethernet and RS232 communication interfaces
IR ADVANTAGE
Real-time continuous analysis of cell SOH
Rapid-bypass leveling techniques are used to actively balance cells
Pack wear-levelling extends pack operating life
Robust, EMI resistant system communication


Evaira EMS provides the battery pack designer the freedom to make trade-offs between battery pack service life, cycle times, and usable capacity without necessarily incurring cost penalties.


Uniform aging of the cells within a battery pack, achieved through Evaira EMSís wear-leveling algorithms, significantly extends the service life of high cell-count battery packs.

For sales enquiries contact: Evaira Sales Team.

 
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