Electrolyte Freezing Point - Piper CHEROKEE WARRIOR PA-28-151 1995 Maintenance Manual

PIPER CHEROKEE WARRIOR SERV I C E M A N U A L
11-55. BATTERY DISCHARGE (WARRIOR III)
The capacity of a storage battery is measured in units of ampere hours, which is the product of the
electrical current in amperes multiplied by the time in hours. Although current may be obtained after the end
of the time, the voltage of the battery has dropped to a point beyond which it is not very useful. The ampere
hours which may be obtained from a battery are greater for a long low-rate or intermittent rate discharge than
for a short high-rate discharge because the voltage will drop faster at the higher discharge rate. The maximum
permissible rate of discharge is limited only by the current-carrying ability of the wiring, motor, or other appa-
ratus to which the battery is connected or by the current-carrying ability of the cell terminals and connectors
and not by the plates themselves. Listed below are recommended discharge rates:
TELEDYNE
Battery
Type
GILL-G243
11-56. BATTERY TEMPERATURE CONSIDERATIONS (WARRIOR III)
Operation of storage batteries beyond their ambient temperature or charging voltage limits will result
in excessive cell temperatures leading to electrolyte boiling, rapid deterioration of the cell, and finally battery
failure. The relationship between the maximum charging voltage and the number of cells in the battery is also
significant, since this will determine (for a given ambient temperature and state of charge) the rate at which
energy is absorbed as heat within the battery. The maximum voltage per cell should not exceed 2.35 - volts,
and the maximum temperature should not exceed 115° F.
Low electrolyte temperatures temporarily reduce the battery capacity and the freezing point depends
on the specific gravity. To prevent freeze damage, maintain the specific gravity at a reasonably high level as
indicated by Chart 6.
Lead-acid batteries are subject to a constant discharge due to
the internal chemical action.
Specific Gravity
1.300
1.275
1.250
1.225
1.200
1.175
1.150
1.125
1.100
Added: February 28, 1995
TABLE XI-IX DISCHARGE RATE
Volts
24
NOTE
TABLE XI-X. ELECTROLYTE FREEZING POINT
°C
-70
-62
-52
-37
-26
-20
-15
-10
-8
2F14
Island Enterprises
(5 HRS.)
Ampere
Hours
15.5
°F
-95
-80
-62
-35
-16
-4
5
13
19
ELECTRICAL SYSTEM