Energy Storage System Unit (ESSU)

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