LC-X1228P Panasonic - BSG, LC-X1228P Datasheet - Page 24

• 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
Charging Considerations
a) Temperature compensation of charge voltage
Compensated voltage value
b) Charging time
Time required for trickle charge ranges from 24 to 48
hours.
Charge voltage should be compensated to the
ambient temperature near the battery, as shown
by the figure below. Main reasons for the tempera-
ture compensation of charge voltage are to
prevent the thermal runaway of the battery when it
is used in high temperature conditions and to
secure sufficient charging of the battery when it is
used in low temperature conditions. Prolongation
of service life of the battery by the above-de-
scribed temperature compensation is expected
as follows
In low temperature zones below 20°C, no sub-
stantial prolongation of the battery life can be
expected by the temperature compensation of
charge voltage.
Time required to complete charging depends on
factors such as depth of discharge of the battery,
characteristics of the charger and ambient tem-
perature. For cycle charge, charging time can be
estimated as follows:
(1) when charge current is 0.25 CA or greater:
Tch = Cdis / I + (3 to 5)
(2) when charge current is below 0.25 CA:
Tch = Cdis / I + (6 to 10) ,where
Tch : Charging time required (hours)
Cdis : Amount of discharge before this charging
(Ah)
I : Initial charge current (A)
2.7
2.6
2.5
2.4
2.3
2.2
At 30°C: prolonged by approx. 5 %
At 35°C: prolonged by approx. 10 %
At 40°C: prolonged by approx. 15 %
-20
-10
0
Minimum
voltage
Minimum
voltage
Temperature (˚C)
10
20
Maximum
voltage
30
40
Maximum
voltage
50
VRLA BATTERIES PAGE 23
c) Charging temperature
(1) Charge the battery at an ambient temperature in
(2) Optimum temperature range for charging is 5°C
(3) Charging at 0°C or below and 40°C or higher is
(4) For temperature compensation values, see a).
d) Reverse charging
e) Overcharging
f) Charging before use
the range from 0°C to 40°C.
to 35°C.
not recommended: at low temperatures, the
battery may not be charged adequately; at high
temperatures, the battery may become
deformed.
Never charge the battery in reverse, as it may
cause leakage, heating or bursting of the battery.
Overcharge is an additional charge after the
battery is fully charged. Continued overcharging
shortens the battery life. Select a charge method
which is specified or approved for each
application.
Recharge the battery before use to compensate
for capacity loss due to self-discharge during
storage. (See “Refresh charge” (auxiliary charge)
table on page 22.)
AUGUST 2003