ESS
SAMSUNG SDI | ENERGY STORAGE SYSTEM
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Samsung SDI Energy Storage System | What is ESS?
Copyright © 2013 Samsung SDI. All rights reserved
ESS is short for
Energy Storage System,
meaning that it can actually
store energy and use the stored
energy whenever the need arises

Samsung SDI Energy Storage System | What is ESS?
As the need
for clean energy arises,
the need to replace current
existing power plants
have become a global issue
Copyright © 2013 Samsung SDI. All rights reserved

Copyright © 2013 Samsung SDI. All rights reserved
What is ESS?

1
Samsung SDI Energy Storage System | What is ESS?
Copyright © 2013 Samsung SDI. All rights reserved
ESS compensates
for intermittency of renewable
energy, such as wind and solar
To compensate for wind and sunshine’s variability,
energy storage provides stored electricity to the grid and stable power
output from renewable energy sources.
• Reduces output variability
• Improves power quality
Frequency
ESS
Time

2
Samsung SDI Energy Storage System | What is ESS?
Copyright © 2013 Samsung SDI. All rights reserved
ESS helps grid system operators
maintain constant frequency
Energy storage based on Lithium-Ion Battery (LIB) provides reliable and
fast frequency response without being subject to
fuel prices and with zero emissions.
• Fast frequency regulation & ancillary service
Frequency
Time

3
Samsung SDI Energy Storage System | What is ESS?
Copyright © 2013 Samsung SDI. All rights reserved
ESS can be used for curtailment
of electricity from renewable
energy sources
Due to transmission constraints, currently, ever-increasing portion of
wind generation is being curtailed. Energy storage is the best option for
reducing renewable power curtailment, relieving transmission congestion,
and achieving full utilization of renewable energy sources.
ESS

4
Samsung SDI Energy Storage System | What is ESS?
Copyright © 2013 Samsung SDI. All rights reserved
ESS can be used to defer transmission and distribution network (T&D)
upgrades and investment
Using energy storage, upgrade to transmission and
distribution networks can be deferred by
smart management of the local peak demands.
• Transmission support
• Transmission congestion relief
• Area/frequency regulation
ESS

5
Samsung SDI Energy Storage System | What is ESS?
Copyright © 2013 Samsung SDI. All rights reserved
ESS enables
commercial & residential
owners to cut energy costs
Electricity stored during off-peak time can be used during on-peak hours so that home/
commercial owners can cut peak demand and electricity cost. ESS integrated with PV can
maximize consumption of solar energy by using electricity stored off-peak.
• Energy cost saving
• Demand management
• Self consumption of solar power
Energy
Consumption
Day
Night

Samsung SDI Energy Storage System | Types of ESS?
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Types of ESS?
ESS is a technology that has been adopted for many years.
The technology used behind ESS includes Compressed Air Energy Storage (CAES),
Flywheel, Pumped Hydro and batteries.
Category
BATTERY
PUMPED HYDRO
FLYWHEEL
CAES
High Energy Density,
larger operating temp. range
Hight Capacity, Long Lifespan
Short Charge Time
High Capacity, Long Lifespan
Significant Negative Effect
on Environment
Highly Inflammable
Geographical Constraint
Type
characteristic

Samsung SDI Energy Storage System | Types of ESS?
Copyright © 2013 Samsung SDI. All rights reserved
Types of BATTERIES?
Currently battery has become mainstream as technologies such as NaS, Lithium-ion, Lead-acid and flow
batteries have begun to participate in various worldwide projects.
Samsung SDI specializes in manufacturing Lithium-Ion Battery (LIB) which is high in energy density,
voltage, discharge rate and lifespan. In addition, LIB is eco-friendly and has no memory effect, making it
optimal for long term use.
Category
LITHIUM-ION BATTERY (LIB)
LEAD-ACID
NATRIUM-SULFUR BATTERY(NaS)
High Capacity, Long lifespan
Low Cost
Low Cost
Low Capacity, Not eco-friendly
Not eco-friendly, Highly Inflammable
Type
characteristic

Samsung SDI Energy Storage System | Where is ESS used?
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Residential
KW
09
Black Out
Energy Consumption Pattern
Solar Generated
12
18
22
PV
Mo
ESS
du
le
Day
Night

Samsung SDI Energy Storage System | Where is ESS used?
Copyright © 2013 Samsung SDI. All rights reserved
Telecom Base Stations
ON-GRID
Antenna
USE & CHARGE / GRID
USE / ESS
RF
SMPS
Antenna
ESS
PIU
RF*
OFF-GRID
SMPS*
ESS
CHARGE / DIESEL
USE / ESS
Diesel
Generator
* RF: Radio Frequency unit
* SMPS: Switched-Mode Power Supply
* PIU: Power Interface Unit
PIU*

Samsung SDI Energy Storage System | Where is ESS used?
Copyright © 2013 Samsung SDI. All rights reserved
UPS(Uninterruptible Power Supply)
Server
UPS
CHARGE / GRID
Internet Data Center
USE / ESS

Samsung SDI Energy Storage System | Where is ESS used?
Copyright © 2013 Samsung SDI. All rights reserved
utility
ESS(UTILITY)
PV
Battery Charging
Battery Deployment
Peak Cut
0
12
24
12AM
6AM
3PM
9PM
USE & CHARGE / DAY
USE / NIGHT
ESS

Samsung SDI Energy Storage System | Why LIB for ESS?
Why LIB for ESS?
LIB has its strengths in the ESS industry because of its high energy density,
efficiency, long lifespan and eco-friendliness.
Energy
Density
(Wh / kg)
ROUND TRIP
EFFICENCY
(%)
Life Time
(yrs)
Eco-FRIENDLY
ASPECT
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Samsung SDI Energy Storage System | How is LIB better?
Copyright © 2013 Samsung SDI. All rights reserved
How is LIB better?
Reduces installation space
19.6
LIB
5
4.32
Lead Acid
Has longer lifespan
years
guarantee
Lead Acid
HAS WIDER Operating temperature
(Less maintenance, means less cost)
20~22.5
Cooling system
needed
Lead Acid
Weighs less when installed
10
years
guarantee
LIB
ton
Lead Acid
HAS more sophisticated BMS,
meaning well managed
Temp/Impedance
Primary sensing
capability
Lead Acid
ton
26.2
LIB
0~40
NO additional
cooling need
ton
Analysis/Forecast
Protection
capability
LIB
ton
3.4
LIB

Samsung SDI Energy Storage System | Types of ESS?
Copyright © 2013 Samsung SDI. All rights reserved
Why LMO?
Lithium based batteries differ in terms of its chemistry, its strengths also varies accordingly.
Samsung SDI specializes in Lithium Manganese Oxide (LMO) batteries
which is the safest of all the Lithium-Ion Battery (LIB).
SAMSUNG SDI
For frequency regulation, Peak shift, Etc.
For IT devices (i.e.; Mobile Phone)

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