LC-X1228P Panasonic - BSG, LC-X1228P Datasheet - Page 23

• Manufacturer Part Number: LC-X1228P
• Description: BATT SEALED LEAD ACID 12V 28AH
• Manufacturer: Panasonic - BSG
• Series: LCr

Specifications of LC-X1228P

• Voltage - Rated: 12V
• Capacity: 28Ah
• Size / Dimension: 6.47" L x 4.92" W x 6.89" H (165mm x 125mm x 175mm)
• Termination Style: Nut/Bolt, M5
• Rechargeability: Yes
• Weight: 25 lbs (11.3kg)
• For Use With: BVW122250003N - BATTERY CHG UNIV 12VDC @ 2.25A271-2390 - BATTERY CHG UNIV 12VDC @ 2.25A271-2386 - BATTERY CHG UNIV 12VDC @ 1.2A271-2385 - BATTERY CHG UNIV 12VDC @ 600MA271-2382 - BATTERY CHG UNIV 12VDC @ 500MA271-2381 - BATTERY CHG UNIV 12VDC @ 500MA271-2380 - BATTERY CHG 120VAC 12VDC @ 500MA271-2378 - BATTERY CHG 120VAC 12VDC @ 300MAPATC-08 - BATT CHARGER 12V 1.5A X 2 UNITPATC-03 - BATTERY CHARGER 12 VOLT 1.5 AMP
• Lead Free Status / RoHS Status: Contains lead / RoHS compliant by exemption
• Other names: LC-X1228; LC-XB1228; LC-XB1228P; LCX1228P; P049

CHARGING METHODS - CONTINUED
Float charge system model
Charging Methods and Applications of VRLA Batteries
Note * Refresh (auxiliary) charge amount should be 120 to 130 % of self-discharge amount. For details, please contact us.
(Auxiliary charge)*
Charging Method
Float charge
Float system is the system in which the battery
and the load are connected in parallel to the
rectifier, which should supply a constant-voltage
current.
In the above-illustrated model, output current of the
rectifier is expressed as:
l
current. Consideration should be given to secure
adequate charging because, in fact, load current is
not constant but irregular in most cases.
Refresh charge
o
Application/
Application
AC
Trickle use
= l
Cycle use
Float use
example
c
+ l
L
where l
Control voltage: 7.25 to 7.45V/6V
battery 14.5 to 14.9V/12V battery
Initial current: 0.4 CA or smaller
Control voltage: 6.8 to 6.9V/6V
battery 13.6 to 13.8V/12V battery
Control voltage: 6.8 to 6.9V/6V
battery 13.6 to 13.8V/12V battery
Float charging compensates for load
fluctuations.
When charging two or more batteries
at a time, select only those which have
been left under the same condition.
General uses, Cellular phones (bag
phones), UPS, Lanterns, Electric tools Medical equipment, Personal radios
c
hours; Constant voltage control
is charge current and l
Normal charging in 6 or more
I
0
I
C
VRLA BATTERIES PAGE 22
I
L
L
is load
Initial charging with current of approx. 0.15
CA, followed by switching voltage to trickle
charge
Two-step constant voltage control
In the float system, capacity of the constant-voltage
power source should be more than sufficient against
the load. Usually, the rectifier capacity is set at the sum
of the normal load current plus the current needed in
order to charge the battery.
Precautions on charging (Float charge)
1. (a) in constant voltage charging (cycle use): Initial
2. Relation between standard voltage value in
Relation between standard voltage value in
constant voltage charging and temperature
Trickle
Cycle
use
use
current should be 0.4 CA or smaller (C: rated
capacity)
(b) in constant voltage charging (trickle use): Initial
current should be 0.15 CA or smaller (C: rated
capacity)
constant voltage charging and temperature is
given in the Table.
12V
12V
6V
6V
Charging with current of approx. 0.1 CA
15.4
14.1
0 C
7.7
7.1
Constant current control
25 C
14.7
13.7
7.4
6.8
AUGUST 2003
40 C
14.2
13.4
7.1
6.7