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FIAMM Energy Technology S.p.A
Installation & Operating Instruction -Technical Manual
Edition 03/2018 Rev.7
INTRODUCTION
In a high technological environment it is extremely
important to have a backup power source whenever
possible. In fact mains power failure could cause severe
losses and damages anytime.
FIAMM ENERGY TECHONOLOGY (FET) has been
developing throughout years of research and experience
several ranges of Absorbed Glass Batteries (AGM) to
ensure the best reliability and quality.
1.
CONSTRUCTION FEATURES
The main construction features of FET AGM
batteries are shortly described in the below section.
1.1.
Plates
Both positive and negative plates are of the flat pasted
type. The active material is made of a paste of lead
oxide, water, sulphuric acid and other materials needed
to obtain the performances and stability required
throughout the battery life. The grids are made of a high
quality lead alloy with calcium and tin which assures
good resistance against corrosion
1.2.
Containers
Battery cases and lids are made of a type of ABS which
complies with American Standards UL 94 (per specific
models class V-0 and with IEC 707, method FV0). This
material is shock resistant and flame retardant. They are
also designed to fully withstand the internal pressure
variations during battery operation. This is further
ensured by reinforced container walls and lids. Handles
have been designed for some batteries into the lids to
facilitate handling.
1.3.
Separators
The separators are made of glass microfiber mats by a
special process which results in a high porosity with very
small pore diameters to ensure maximum oxygen
diffusion while maintaining high plate utilization and
low internal resistance. The plates are completely
wrapped by the separator and the electrolyte is
completely absorbed in the separator and plates. By this
method, the shedding of active material which during the
battery life causes shorting with flooded battery
construction is avoided.
1.4.
Electrolyte
The electrolyte is sulphuric acid of 1.3 sp. gr. at 20°C
with same purity characteristics as other types of high
quality lead acid batteries.
1.5.
Valves
Each cell has a one way valve to permit the release of
gases from the cell whenever the internal pressure
exceeds the fixed safety value. The valve is rated at
0.15~0.30 atmospheres (15~30 kPa).
1.6.
Terminal posts
Suitable threaded post designs (‘female’ or ‘faston’ pole)
with solid connectors are provided to ensure low ohmic
losses. Posts to lid seals are designed to prevent leakage
over a wide range of internal pressures and conditions of
thermal cycling. Intercell connections in the FET
multicell AGM battery design are electrically welded
through the cell walls to minimize the internal
impedance while maintaining complete separation of the
individual cells.
Special plastic terminal caps are provided for
transportation assuring a protection against short circuit
during transportation.
Cutaway drawing of FET AGM cell
Female (Bolt) terminal
A
B
C
E
E
D
D
C
A
B
F
E
D
F