Discharge Test - Club Car IQ Plus 2008 Maintenance And Service Manual Supplement

14
BATTERIES
If the difference between the cells is 0.020 or more, the low cell should be suspected. It may require a catch-
up charge or it may be a weak cell. When the variations between cells reach 0.050 or more, the battery with
the low cell should be replaced.
VEHICLE BATTERY
NO. NO.
12 1
35 6
54 3
69 5
38 2
22 4

DISCHARGE TEST

If the previous tests have failed to identify the problem, conduct a discharge test. The discharge test comes
closest to simulating actual vehicle operating conditions by continuously drawing current from the batteries
until voltage drops to 42.0 volts.
The discharge test is the hardest test on the batteries and the most time-consuming to perform. Use the bat-
tery discharge tester (CC P/N 101831901).
Performing the Discharge Test
1. Be sure the batteries are fully charged and that the electrolyte level is correct in all cells.
2. Connect the tester leads to the positive (+) post of battery no.1 and negative (–) post of battery no. 8.
3. Check and record the electrolyte temperature of the battery packs. Check cell no. 2 (second cell from
positive post) in each battery.
4. Reset discharge machine and turn the tester ON.
5. When the batteries have been discharging for approximately 60 minutes, set the discharge machine to
function 3 and check battery set voltage. Check voltage every 10 minutes throughout the rest of the test.
As soon as the battery set voltage reaches 0.5 volts above the shut-off point (42.0 volts), use a multim-
eter to measure individual battery voltages. Measure and record the voltage of each battery to the near-
est 0.01 volt. See following NOTE.
NOTE: The tester will shut off automatically when shut-off voltage is reached.
Page 14-12 2008-2011 IQ Plus Electric Vehicle Maintenance and Service Supplement
ELECTROLYTE CORRECTION
TEMPERATURE FACTOR
20 °F (-6.6 °C) – 0.024
90 °F (32.2 °C) + 0.004
50 °F (10 °C) – 0.012
80 °F (26.7 °C) 0.000
100 °F (37.8 °C) + 0.008
80 °F (26.7 °C) 0.000
CORRECTED SPECIFIC GRAVITY
CELL 1 CELL 2
1.275 –0.024 1.280 – 0.024 1.280 – 0.024
= 1.251 = 1.256
1.155 + 0.004 1.165 + 0.004 1.160 + 0.004
= 1.159 = 1.169
1.260 –0.012 1.200 – 0.012 1.270 – 0.012
= 1.248 = 1.188
1.250 – 0 1.255 – 0
= 1.250 = 1.255
1.200 + 0.008 1.180 + 0.008 1.170 + 0.008
= 1.208 = 1.188
1.240 – 0 1.245 – 0 Float does
= 1.240 = 1.245
Battery Testing
REQUIRED
ACTION
CELL 3
Sound Battery –
= 1.256 Fully Charged
Discharged
Battery –
= 1.164
Recharge
Bad no. 2 Cell
= 1.258
Weak no. 3
1.230 – 0
Cell – Catch-up
= 1.230
Charge
Discharged
Battery –
= 1.178 Recharge and
Recheck
no.3 Cell Dead
– Replace Bat-
not rise
tery