0.04
0.08
0.1 2
0.1 6
0.2 0
0.2 4
0.2 8
2.6 0
2.4 0
2.2 0
2.0
1.8
1.6
2.4 2
2.3 6
0.3 0
0.2 4
0.1 8
0.1 2
0.0 6
2.Oxygen Combination
The pos itive plate generat es oxy ge n gas in the final
stage of char g i n g . Un d e r th e c o n d i t i o n o f ex c e s s i v e
a d d i t i v e s a t t h e n e g a t i v e , o x y g e n s p r e a d s t o t h e
negat ive pl at es through PE com pound separ at or and react s with
s p o n g y l e a d a n d f o r m s l e a d o x i d e a n d t h e n t u r n s
into lead sulfate and wa ter. Keep the negative plates
i n d e p o l a r i z a t i o n o r u n d e r c h a r g e s t a t e s o t h a t t h e
b a t t e r y c a n n o t r e a c h t h e o v e r p o t e n t i a l o f o x y g e n
g a s s i n g . T h u s t h e b a t t e r y a v o i d s o x y g e n g a s s i n g
and wat er loss and is made a maintenance free seal ed
storage bat ter y.
7 Battery Charge, Discharge & Life
1. Charge Characteristics
Charge condition is one of the important factors in
battery use. The battery performance and service
life are directly related to its charging 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 and the maximum current is 0.2 .
1) At 25℃, the float charge voltage of 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=「2.27 – 0.003(t-25)」* n.
C A C A
2o 20
5. Charge Curve of Cycle Use
The batteries for cycle service adopt the constant
voltage but limited current method. At 20℃~25℃,
the charge voltage of GEL series battery is 2.40V
per cell; the initial charge current is not larger than
0.2 and the battery fully charges in approximately
24 hours.
C A
20
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.
Positive
Negative
Charge Overcharge
Charge
Charge Characteristic Curve of Float Use
Charge Volume (%)
Charge Current (A)
Charge Voltage (V)
Charge Time (Hr)
Charge Voltage
Charge Volume
Discharge
Charge with
& Limited Curre nt :
Charge Voltage : 2.30V/Cell
Charge Curren t: 0.2
Constant Volta ge
C A
20
Temperature: 25℃/77℉
Charge Characteristic Curve of Cycle Use
Charge Volume (%)
Charge Current (A)
Charge Voltage (V)
Charge Voltage
Charge Volume
Discharge
Charge with
& Limited Curre nt :
Charge Voltage : 2.40V/Cell
Charge Curren t: 0.2
Constant Volta ge
C A
20
Temperature: 25℃/77℉
Charge Time (Hr)
20
20
4
Equalize charge is required for float Service as long time float charge will make some batteries drop
behind in the battery bank. An equalize charge can prevent battery stratification and reduce
sulfation and bring all cells to similar levels, which is the leading cause of battery failure.
Equalize charge requirements for RITAR battery as follows:
※ Equalize charge 1 time every three months or every 20 discharge cycles.
※ Equalize charge method: with equalize charge voltage 2.35~2.45Vpc @25℃ and max. charge
current 0.3CA, and equalize charge time is 12~24h(when the charge current at the end stable about
2~3 hours ,stopped equalize and switch to float ).
※ Before equalize charge please let the battery 100% discharged.
4. Equalize Charge
