45
Warning: Slowly infuse strong sulphuric acid into distill water and stir liquid by a
glass rod or lead cover wood stick, do not infuse distill water into sulphuric acid absolutely,
otherwise, there will be liquid boiling and splashing to injure people.
To be sure the polarity of connection between charger and battery is correct, that is
anode to anode and cathode to cathode,a reliable connection is necessary.
The first stage of initial charge use 0.5I
5
A (D-600 battery is 60A) until voltage of single
cell is up to 2.4V, then begin the second stage;
The second stage of initial charge use 0.25I
5
A (D-600 battery is 30A)
；
The temperature shall not surpass 45
℃
for electrolyte during charging, have charging
current or stop charging when the temperature almost reach 45
℃
, wait until temperature is
below 35
℃
,then charge again. But the charging time needs to be prolonged.
Indication of enough charging:voltage is 2.6V in second stage of initial charging
meanwhile voltage change is less than 0.005V; density is up to 1.28±0.005(25
℃
), there is no
evident change within 2 hours and a lot of fine and closely bubble occurs. The Charging
capacity is 4
～
5 times of rated capacity and the charging time is 70 hours.
To check density of electrolyte of each cell during charging last stage to control
percentage of sulphuric acid in electrolyte. If necessary, to regulate by distill water or 1.40
dencsity sulphuric acid to manage electrolyte density and liquid level to normal value.
After finishing initial charge, clean battery surface and cover oil inlet.
（
2
）
Normal charge
Do not use uncharged battery. Please watch out for discharge during battery charging. If
discharge exceed standard value, charge it please. Excessive discharge (voltage is less than
1.7V/cell) is prohibited absulotely. Stop discharging when electrolyte density decreased to 1.17
and recharge it in time. Do not stop charge randomly during charging course.
In normal charging,Open cover of oil inlet,check if the electrolyte level is in normal
height,otherwise regulate it to the normal height by distill water.
Connect charger to battery correctly,anode to anode, cathode to cathode,absolutely no error.
Charger is special to suit battery, it can regulate charging current automatically according to
battery capacity until full of charging.(consult to charger manual instructions)
Suggest to build record of charge/discharge for each battery to favour knowing battery in time.
During charging, to record current, total voltage, ench cell voltage (with code), electrolyte density
and temperature (with 0
～
100
℃
mercury thermometer) every 1-2 hours.
It tells you full of charging when there are lot of fine and closely bubble in electrolyte and
voltage of cell is stable between 2.5-2.7V and there is no increase
for density for terminal voltage within 2-3 hours. If one or two cell emit bubble weakly or no bubble,
please find out and record it.
Do not exceed 45
℃
for electrolyte temperature during charging. If temperature close to 45
℃
,
stop to charge until temperature is below 35
℃
.
During charging ending, check and regulate density of electrolyte. If density is abnormal, draw
out some electrolyte, then infuse some to regulate: if original liquid density is too low, regulate by
density 1.40 electrolyte; if too high, regulate by distill. Difference of electrolyte density of each cell
is less than 0.01,liquid level shall also be normal.after adjust density,charge battery 0.5 hour with
low current to mix electrolyte equality,then check electrolyte density again and adjust it if
necessary.
（
3
）
Blance charging
Under normal situation although each cell of the battery runs under the same condition,there
are still reasons lead to that their capacity can not be exactly the same,so , balance charging is
necessary to eliminate difference among cells
. It’s easy to do the balance charge according to
charge manual instruction.
Normally, battery need balance charge every 2
～
3 months. Balance charging is also
necessary for battery which is out of work for long time.
