Chapter 9 Electrical System
,;..2·;...B_,;;;.at;.;.te;_r.,:;;.y
_____________________________
3,4]H3(B)(C)E
2-4 Charging
2-4. 1 Charging methods
There are two methods of charging a battery: normal and
rapid.
Rapid charging should only be used
in
emergencies.
• Normal charging···Should be conducted
at
a current of
1/10 or less of the indicated battery
capacity
(1
0A or less for a 1 00AH
battery)
• Rapid charging··· Rapid charging
is
done
ove~
a short
period
of
time at a current ot
~
/5 ~
1/2 the indicated battery capacity
(20A~50A
for a 100AH battery).
However,
since
rapid
charging
causes the electrolyte temperature
to rise
too high, special care must
be exercised
..
2-4.2 Charging procedure
(
1)
Check the specific gravity and adjust the electrolyte
level.
(2)
Disconnect the battery cables.
(3)
Connect the red clip of the charger to the
(+)
battery
termlnal and connect the black clip to
the(-)
terminal.
\
\
Charger
(4)
Set the current to 1/10
~1/5
of
the capacity indicated
on
the outside
the
battery.
(5) Periodically measure the specific gravity during
charging
to
make
sure
that
the
specific
gravity
remains at a high fixed value. Also check whether gas
is being generated.
2-4.3 Charging precautions
(1)
Remove the battery caps to vent the gas during
charging.
(2)
While charging, ventilate the room and prohibit smok-
ing, welding, etc.
(3)
The electrolyte temperature should not exceed
45°C
during charging.
(4) Since an alternator is used on this engine, when
charging with a charger, always disconnect the battery
(+)
cable to prevent destruction
of
the diodes.
(Before disconnecting the
(+)
battery cable, discon-
nect
the(-)
battery cable [ground side].)
Printed
in
Japan
HINSHI,H8009
9-7
1.29
1.28
Specific
1
.27
gravity
1.26
1.25
1.24
1.23
.......
1'.._
.......
-..........._
r-.....
'I'-......._
I'-....._
........
.........
........
"-
"--
't-....._
---I'-....._
.......
"""-
K
r-.....
i-.....::-
,...__
1-.......
....,...__
........
~
.........
.............
r---.
1-.......
.....
t-....._
'I-.......
-.........._
'~
r-.....
'i-...
....
,...__
I""',.,..._
r-........
I'-....._
r-.....
-10
0 10
20
30
40
Electrolyte
temperature
CC)
'r-.......
r-
'i-...
r-.....
~
.....
r-.....
~-
50
Electrolyte
temperature
and
specific
gravity
2-5 Battery storage precautions
The life of a battery depends considerably
on
how
it
is
handled. Generally speaking, however, after about two
years
its
performance
will
deteriorate,
starting
will
become difficult, and the battery will not fully recover its
original charge even after recharging. Then it must be
replaced.
(1)
Since the battery will self-discharge about 05%/day
even when not
in
use, it must
be
charged 1 or 2
times a month when
it
is
being stored.
6
,---,--------,~-,--,-------~-~-~
Self-discharge/
day
(%)
3
f------J---l'---c--~--1------:P--+-----1
0 1 2 3 4 6
Number
of
days
alter
charging
(2)
If
charging
by
the engine alternator
is
insufficient
because ol frequent starts and stops, the battery will
rapidly lose power.
Charge the battery
as
soon as possible after it
is
used under these conditions.
(3)
An
easy-to-use battery charger that permits home
charging
is
available from Yanmar. Take proper care
of the battery
by
using the charger as a set with
a hydrometer.
When the specific gravity has dropped to about 1.16
and the engine will not start. charge the battery up to a
specific gravity of 1.26 (24 hours).
(4)
Before putting the battery
in
storage for long periods,
charge it for about 8 hours to prevent rapid aging.
~mp;e
charger
-:::----::tJ.
~
--;/
CJ
I]
·~d
i,
\I
"
-~
1~;
~
.~,A
:----....::---..
_____
_
To Next Page
Loading...
