EPIC Battery Troubleshooting Guide

EPIC batteries can occasionally encounter problems. Troubleshooting is straighforward and approachable. Read the troubleshooting guide now.

Battery Troubleshooting Guide (V1.22.8)

If the battery of the electric vehicle has been installed and the battery is faulty, please
follow the following instructions to solve the fault quickly.

1. Reduced driving range
If the battery range of your electric vehicle is significantly shortened when fully charged,
it indicates that there is a fault in the battery bank. Please use a multimeter to check
the voltage of each battery.

If the voltage of one battery is significantly lower than that of the other batteries, the
battery has an internal fault.

If the voltage difference between one or more of them exceeds 0.18V(6V battery) and
0.24V (8V battery), the battery exceeding the voltage difference is judged to be
"capacity backward".

For the battery with internal failure or low capacity, remove the battery from the car,
and select the battery with pressure difference of 0.08V(6V battery) and 0.105V (8V
battery) from the spare battery or service battery for use.

Internal faulty batteries are to be scrapped.

Capacity backward batteries, which can be charged separately using a matching
charger or in series with other low-voltage batteries to form 48V, are then charged
together and can be used as service batteries when fully charged.

2. Charging heat
The battery in the charging process heating, check the charger charging voltage and
current, voltage or current is too high, will lead to the battery in the charging process
temperature rise, and even the battery bulging phenomenon.

Check whether the connecting line of the battery is firmly connected with the leading
terminal. If the wiring is not firmly connected, it is easy to cause the battery to heat up
in the charging process, or even burn out the terminal or connecting line.

If the cause of the heating is found and the temperature of the battery does not exceed
50 ° C, wait until the temperature of the battery is lower than 30 ° C and there is no
longer a potential heating problem, you can continue to use the battery.

If the cause of the issue is not found, seek help from the supplier.

If the temperature of the battery exceeds 50 ° C or the battery is swollen and deformed,
the battery cannot be used anymore and should be replaced with a qualified spare
battery.

3. Abnormal appearance
During use, check the appearance of the battery once a week. Check the following
contents:

A. Check the battery cable. The bolts or nuts of the cable may become loose due to
the vibration of the vehicle. Loose cable bolts or nuts may cause battery performance
instability, battery damage, or personal safety.

B. Check the battery case and cover for acid leakage, deformation, cracks, and
damage. If the appearance is abnormal, determine the cause first. If normal use is
affected, replace the battery with a qualified spare battery.

C. Check whether there is dirt on the battery surface. Use a dry cloth to clean the dirt
on the battery surface.

D. Check cables and terminals for rust and corrosion. Use a steel brush to remove rust
and corrosion and apply antirust agent. Severe rust or corrosion Replace a new cable
or battery.

4. Battery short circuit or open circuit
Single cell short circuit appears inside the battery, and the open circuit voltage is about
2V lower than the normal battery. It will react strongly to battery charging, or the heat
is obvious when a single cell is charged.

The short-circuited battery cannot be used further and should be replaced with a
qualified spare battery.

Circuit breaker battery can measure the voltage, but the whole battery cannot charge,
cannot discharge, using the internal resistance meter can check out the circuit breaker
single battery, because the internal resistance of circuit breaker battery is very large.

Open circuit battery, no measured voltage, or voltage close to 0V.

The disconnected battery can no longer be used and should be replaced with a
qualified spare battery.

5. Precautions for battery use
The battery is not allowed to lose power storage, if used up idle for a few days to charge,
the plate is prone to sulfuric acid salinization, capacity decline. Battery deficit storage
will seriously affect the service life, the longer the idle time, the more serious the damage.

The electric vehicle should slow pedal when starting, start the vehicle with a small
current until the uniform speed of the vehicle. If you start, press the accelerator pedal
to the bottom. At this time, the motor current will increase rapidly, so that the battery
will discharge too fast, and the voltage will drop quickly. The smaller the discharge
depth, the longer the battery life. So, reduce the discharge of high current, can extend
the battery life, increase the range.

Charger should be selected and matched with the model battery charger, charging
should avoid high temperature and humidity, do not let water into the charger, to avoid
the occurrence of short circuit accident.

If the vehicle needs to be stored for a long time, the battery must be fully charged first
and the battery should be replenished once a month. Or, under the operation of
professional personnel, remove one of the connecting wires of the battery pack, so that
the battery in the open state, can be stored for a longer time, storage period of
replenishment every 3 months.