Energy Storage System Unit (ESSU) Medium power lithium-ion (M-Type) Saft’s M-type ESSU is a storage system in a 19" cabinet designed for community energy storage and smart-building applications requiring medium power capability from any state of charge, high efficiency and long lifetime. Built with proven Saft NCA Li-ion technology, Saft ESSUs is a fully integrated storage system, providing high operational reliability over thousands of cycles with excellent energy efficiency. Its modular design based on 29 Synerion® 24M modules in series allows a power rating above 100kW and an energy rating above 50kWh, which is a typical sizing for smart-buildings and community energy storage. Applications Community energy storage: Load peak shaving, management of feeder congestion, voltage regulation, blackout management, islanding ■■ Smart-buildings: self-consumption (PV, CHP), energy shifting, price arbitrage ■■ Features Field-proven NCA Li-ion technology (15 years’ experience) ■■ Advanced industrial design offering highest safety and robustness ■■ 20 years design life with daily cycles at 60% depth of discharge ■■ Sophisticated battery management system composed of one Battery Management Module (BMM) •Monitoring and control of voltage at temperature at cell level •Real time calculation of charge and discharge current limits •Real time calculation of SOC using temperature, aging, voltage and currents •Balancing of State of Charge (SOC) between strings • Alarms and faults management (contactor opening rules) •Indication of State of Health (SOH) of the system integrating cycling and calendar aging •Black box registering alarms and number of cycles ■■ Nominal characteristics at + 25°C/+ 77°F Voltage (V) Capacity (C/3) (Ah) Rated energy (C/3) (kWh) Continuous charge power (kW) Continuous discharge power (kW) Mechanical characteristics Width (mm) Height (mm) Length (mm) Weight (kg) Electrical characteristics at + 25°C/+ 77°F Minimum Voltage (V) Maximum Voltage (V) Maximum continuous discharge current (A) Maximum continuous recharge current (A) Discharge time at nominal power (h) Recharge time at nominal power (h) Insulation resistance (1000 V – OC) Dielectric Operating conditions Operating temperature Cycle efficiency (one way) Self-discharge Calendar lifetime at + 25°C/+ 77°F 730 80 58 60 110 1200 1450 850 820 609 812 200 (180 if several ESSU in parallel) 82 0.5 1 >100 MΩ 3 kV rms – 20°C/+ 55°C (– 4°F to + 131°F) >95% ≤5% per month >20 years Benefits Flexibility to provide both power and energy functions ■■ Best energy efficiency of all electrochemical technologies (better than 95%) ■■ Easy system integration: compatible with most power conversion systems in the market ■■ Excellent flexibility: possible to reduce number of modules inside the cabinet and to upscale energy and power by paralleling multiple ESSUs ■■ Low maintenance ■■ Diagnostic interface available ■■ Functional characteristics High power capability Well suited for highly dynamic charge/ discharge profiles from any state of charge ■■ Outstanding calendar and cycle life ■■ Stable internal resistance ■■ High energy density cells ■■ High charge retention ■■ ■■ Safety Storage conditions Storage temperature Storage time Maximum altitude Maximum relative humidity Compliance to standards Cell safety Module safety EMC Cabinet protection class Vibrations and shocks Seismic Environment Transport classification Transport regulation compliance Marking Directives Manufacturing plants – 20°C/+ 55°C (– 4°F to + 131°F) 6 months 3000 m above sea level 95% (non-condensing) UL 1642 EN 50178 / IEC 60950 IEC 62 040-2 Cat C1 and C3 IP 20 IEC 60721-3-3 (class 3M4 and 3M2 respectively) IEEE 693 high level IEC 62093 (indoor conditioned) UN 3480 - Class 9 UN 3480 - ST/SG/AC.10/11 Rev 5 § 38.3 CE ROHS, REACH, WEEE ISO 9001, QS 9000 and ISO 14000 Energy storage module Cycle life at + 25°C/+ 77°F 10 000 000 Safety driven design guarantees safe behavior in case of abuse usage or cell thermal runaway. • cell level : shutdown effect separator, mechanical venting to release gases, materials selected to resist high temperatures and remain stable during gas release •module level : electronic board for voltage and temperature monitoring and cells balancing and structural protection to avoid thermal runaway propagation •string level : BMM with both circuit breaker and contactor to manage short-circuits, over-currents, overtemperature and over-voltages ■■ Stringent qualification processes (see compliance to standards) ■■ Safe handling of battery modules during maintenance because of low voltage modules (24V) ■■ Power applications 70% capacity at EOL Number of cycles 1 000 000 100 000 10 000 1 000 0 10 20 30 40 50 60 70 80 90 Cycle life depends on both depth of discharge (DOD) and charging rates. The above results are based on testing at a fixed DOD and varying charging rates. The end of life (EOL) is reached when the remaining capacity is 70% of the initial capacity. Saft Industrial Battery Group 12, rue Sadi Carnot 93170 Bagnolet - France Tel.:+33 1 49 93 19 18 Fax:+33 1 49 93 19 64 www.saftbatteries.com 100 Depth of discharge (%) Doc No.: 21867-2-0313 Edition: March 2013 Data in this document is subject to change without notice and becomes contractual only after written confirmation. Société par Actions Simplifiée au capital de 31 944 000 € RCS Bobigny B 383 703 873 Produced in the UK by Arthur Associates Limited