5
6
7
Battery Applications
8
Operating Principle
4) Excellent Deep Cycle Ability
5) Low Self Discharge
6) Environmental & Non-polluting
7) Safe & Reliable
Unique grid alloys & special positive/negative lead paste formulations makes the battery perform excellent in
deep cycle using and recover quickly upon over discharging and extend the float service life.
Using high purity raw materials and gel electrolyte ensures MCA batteries have less self-discharge.
Gas Recombination technology ensures the battery high seal reacting rate, which can prevent the acid fog from
separating out.
Efficient venting system automatically release excess gas when the pressure rises above the normal level &
reseals the valves when it returns to the normal rate, which can protect the battery from bursting.
1) Golf Cars, Wheelchairs& Electric Power Vehicles
2) Power Tools, Lawn Mowers & Vacuum Cleaners
3) Electric Toys & Recreation Equipments
4) Solar & Wind Power Generation Systems
5) Lighting Equipments
2. Oxygen Combination
The positive plate generates oxygen gas in the final
stage of charging. Under the condition of excessive
additives at the negative , oxygen spreads to the
negative plates through glass fibre separator and
reacts with spongy lead and forms lead oxide and
then turns into lead sulfate and water. Keep the
negative
plates in
depolarization or undercharge
state so that the battery cannot reach the over
potential of oxygen gassing . Thus the battery avoids
oxygen gassing and water loss and is made a
maintenance free sealed storage battery.
1.Electrochemistry
A lead-acid battery is an electrical storage device that
converts electrical energy into potential chemical
energy; when needed the stored chemical energy can be converted back into electrical energy again to be
supplied to external systems . In the discharge state, part of PbO
at the positive turns into PbSO , and part of
Pb at the negative also turns into PbSO . In this electro-chemical reaction,
both positive and negative
elec-
trodes generate PbSO . In the charging state,
the lead sulfate (PbSO ) at
the positive and negative
t u r n s
into PbO and Pb, respectively. When in discharging, the concentration and density of electrolyte H SO decreases
gradually; while in charging, it increases . Battery charging and discharging are realized by electrochemical
reactions.
2
4
4
4
4
2
4
9
Battery Charge, Discharge & Life
1. Charge Characteristics
Charge condition is one of the important factors in
battery
use. The b a t t e r y
p e r f o r m a n c e
a n d
service life are directly
related
to
its
c h a r g i n g
methods and charging parameters in using. The battery
is recommended to be charged at the temperature range
of 5-30
. At any temperature lower than 5
or
higher than
35
it will cause undercharge or
overheating and then decrease the battery life.
2. Charge Curve of Float Use
℃
℃
℃
3. Relationship between Float Charge Voltage and Environment Temperature
At general temperature
5
~30
, float charge voltage is 2.25V~2.30V. The batteries for float charge
service adopt the constant voltage but limited current method. The initial current is 0.1 C A and the maximum
current is 0.2C A
1) At 25
, the float charge voltage of 2V battery is 2.27V per cell.
2) When the ambient temperature changes, the float charge voltage should be adjusted. The temperature
compensation coefficient is -3Mv/
, i.e., Ufloat=
2.25 0.003(t-20)
* n.
（ ℃
℃ ）
℃
「
-
」
℃
4. Charge Curve of Cycle Use
The batteries
for cycle service
adopt the constant
voltage
but limited
current
method. A t
2 0
~25
, the charge voltage of FC
s e r i e s b a t t e r y i s
2.40V per cell;
the initial charge current is
not larger
t h a n 0 . 2 C A a n d t h e b a t t e r y f u l l y c h a r g e s i n
approximately 24 hours. In the final stage of charging, if
the charge current value remains unchanged for 3
hours, it indicates that the battery is fully charged.
Charge curves are as right.
℃
℃
Charge Voltage
A
6V
12V
( )
Charge Voltage
A
6V
12V
( )
