SC
SC
SC
SC Battery
Battery
Battery
Battery and
and
and
and Charging
Charging
Charging
Charging System
System
System
System
- 7 -
Diagnosis
Diagnosis
Diagnosis
Diagnosis and
and
and
and Test
Test
Test
Test
1. Fault diagnosis of Battery
Fault
Fault
Fault
Fault Fault
Fault
Fault
Fault symptoms
symptoms
symptoms
symptoms Cause
Cause
Cause
Cause analysis
analysis
analysis
analysis Troubleshooting
Troubleshooting
Troubleshooting
Troubleshooting
Insufficient
battery power
①
Voltage is approximately 12V
② Density is under 1.220 dt
③ Underpowered vehicle starting, dim
lighting, low honk
④ The capacity test is in the yellow
area.
①
Too low set value of vehicle
regulator
② Power consumption is larger than
that of charging.
③ High start frequency and short
driving distance
④
Insufficient power generation or
circuit fault
⑤ Terminal corrosion or unfirm
connection
①
Replace the regulator
② Carry out the off-board
charging
③
Eliminate generator or
circuit faults
④ Clean corrosions on
terminals.
Overcharge
①
Perpetual reddish yellow of battery
case inner wall (operating bolt)
② Separator carbonization or softening
③
Red brown and thick electrolyte
④ P ulpy shedding of positive active
material
①
Too high set valve of vehicle
regulator
② Too large current in charging and
too long charging time
③ Closed operating bolt in charging
①
Regulate or replace the
regulator
② Charge according to relevant
regulations
③ For mild overcharge, clean it
with water and recharge it
for application.
Overdischarge
①
Voltage is under 10V
② Density (proportion) is 1.100g/cm
3
③ Tattletale gray and thick electrolyte
①
Apply the undercharged battery
② V ehicle undercharge and too
long service time of battery
③ Short circuit in vehicle circuit
④
Forget to turn off electric switch
⑤ Impure electrolyte or serious self
discharge
①
Replace the circuit regulator
② Guarantee the quality and
quantity of off-board
charging
③
Eliminate circuit faults
④ Keep a clear head in parking
(to turn off the switch)
⑤
Replace with a new battery
Short circuit
①
Voltage is under 10V
② No voltage in faulted cell
③ No proportion in faulted cell
④ Smoking and bubbling in
discharging
⑤
No response from the faulted cell in
charging
①
Lead leakage or foreign matter
dropping in battery assembly
② Pole plate bending in battery
assembly
③ Burrs of cluster plate pins
④
Holes or cracks in separators.
⑤ Artificial damage
①
Disassemble and analyze it
② Replace with a new battery
Open circuit
① Unusually instability of voltage
②
Lead leakage and cavities at the
place 5mm upper than the terminal
top
③ Measure voltage is under 10V and
discharging returns zero
④ Unable current input in charging or
there is abnormal noise
① Poor welding of terminal posts
②
Broken busbar
③ Open welding of wall weld
④
Broken intermediate terminal post
① Repair
②
Replace with a new battery
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