DAF CF65, CF75, CF85 Series . Manual — part 508
5
CF65/75/85 series ≥0E621376
Charging batteries
BATTERIES
2-3
2.2 METHODS OF CHARGING
Always disconnect the battery
terminals before charging.
Normal charging
-
Normal charging is done to partially or fully
restore discharged batteries to full capacity.
In most cases, a charging current of
1
/
20
to
1
/
10
of the capacity is selected.
-
It is important to reduce the charging
current during gas development and to
switch the charger off when the battery is
charged.
Fast charging
-
With this method, multiples of the normal
charge current (approx. 3 to 5 times) are
used to achieve an acceptable charge
condition in the shortest possible time.
-
Before fast charging, remove the battery
leads to prevent damage to the electronic
components.
-
Remove the cell sealing plugs so that the
released gases can easily escape.
-
To prevent overcharging, switch to a lower
charging current when the cell voltage is
reached (2.35 to 2.4 volts/cell).
Note:
If possible, avoid fast charging. Only use it
in exceptional cases. Fast charging causes
battery overloading, which reduces the
service life of the battery.
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5
BATTERIES
Charging batteries
CF65/75/85 series ≥0E621376
2-4
Buffer charging
-
With this method, the consumer and the
charger are both connected to the battery.
The charger delivers sufficient current to
ensure that the battery remains virtually fully
charged. The battery will deliver peak
currents to the consumer.
-
Buffer charging is best done at a constant
(stabilised) voltage.
Trickle charging
-
A fully charged battery that is not used for
some time, will start to discharge of its own
accord. It may discharge at a rate of 0.1%
to 1% per day. Trickle charging
compensates for such discharges.
-
The charging current for trickle charging
should be around 0.1 A per 100 Ah.
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5
CF65/75/85 series ≥0E621376
Storage of batteries
BATTERIES
3-1
3. STORAGE OF BATTERIES
3.1 GENERAL
Before storing batteries, take the following steps:
1. Remove the battery terminals.
2. Clean the battery terminals and top of the
batteries.
3. Grease the battery terminals with petroleum
jelly.
4. Check the charging condition of the
batteries, and charge them if necessary.
See section “Checking batteries”.
5. Check the electrolyte level; this should be
approx. 10 mm above the plates or up to
the level indicator, if present.
If necessary, top the batteries up with
distilled water.
3.2 STORAGE UP TO FOUR WEEKS.
If batteries (whether as separate units or fitted in
a vehicle) are not going to be used for an
extended period of time not exceeding four
weeks, the following measures should be taken:
1. Do not connect the battery leads to the
batteries.
2. Check the charging condition of the
batteries regularly, particularly if the
batteries are stored in low temperature
conditions. See section “Checking
batteries”.
If the voltage falls below 12.4 volts, or if the
relative density of the electrolyte in one or
more of the cells is less than 1.23 kg/dm
3
,
the battery must be charged.
Note:
The lower the relative density of the
electrolyte, the higher the risk of the battery
freezing.
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5
BATTERIES
Storage of batteries
CF65/75/85 series ≥0E621376
3-2
3.3 STORAGE FOR MORE THAN FOUR WEEKS
If the batteries will not be used for more than
four weeks, the following measures should be
taken:
1. Remove the batteries from the vehicle and
store them in a frost-free, dry, cool and
well-ventilated room.
2. Check the charging of the batteries
regularly, at least once every four weeks.
See section “Checking batteries”.
If the voltage falls below 12.4 volts, or if the
relative density of the electrolyte in one or
more of the cells is less than 1.23 kg/dm
3
,
the battery must be charged.
3. Limit the storage period to a maximum of
three months. The longer the period of
storage, the greater the permanent loss of
capacity.
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