Energy Storage System

ESS
SAMSUNG SDI | ENERGY STORAGE SYSTEM

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Samsung SDI Energy Storage System | What is ESS?


ESS is short for
Energy Storage System,
meaning that it can actually
store energy and use the stored
energy whenever the need arises


As the need
for clean energy arises,
the need to replace current
existing power plants
have become a global issue



What is ESS?

1



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



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



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



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



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?


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



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?


Residential
KW

09

Black Out

Energy Consumption Pattern
Solar Generated

12

18

22

PV

Mo

ESS

du

le

Day
Night



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*



UPS(Uninterruptible Power Supply)

Server

UPS

CHARGE / GRID

Internet Data Center

USE / ESS



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


Samsung SDI Energy Storage System | How is LIB better?


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



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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