Electric vehicle battery maintenance

1. It should be fully charged before use. Newly purchased electric vehicles should be
fully charged before use. Because many electric vehicles have been stored in stores for
several months, or even more than half a year, they must be fully charged before using
them. It is best not to use them immediately after fully charged. They need to be left
for about ten minutes.


2. The battery should be installed firmly on the electric bicycle. Remove the battery
for charging. When installing, install the battery on the electric bicycle firmly to
prevent the battery from being damaged by vibration during riding. Do not drop, roll
over, or press the battery during transportation.


3. Keep the battery dry and clean. Frequently remove dust and dirt on the battery
cover, and keep the battery dry and clean to prevent the battery from discharging


4. Develop a good habit of charging the battery every night. Never leave the battery in
a state of insufficient power for a long time, and develop a good habit of charging the
battery every night. If it is not used for a long time, it should be fully charged,
placed in a cool and dry place, and charged regularly, usually 10 days.


5. Just start with a pedal. When the electric bicycle is started, use the pedal. If
there is no pedal, you can use the foot to push the ground to help start. When going
uphill, use the pedal to help the electric bicycle go uphill to avoid excessive
discharge current and damage the battery.


6. Don’t let the battery over-discharge, do shallow discharge and frequent charging.
When riding, be careful not to over-discharge the battery. After the battery is
discharged to the end voltage, continuing to discharge is called over-discharge. Over-
discharge can easily cause serious battery loss, which greatly shortens its service
life. Therefore, when the battery is in use, avoid deep discharge as much as possible,
and perform shallow discharge and frequent charging. In general, it should be done. The
battery should be charged once when the discharge depth is 50%. Electric bicycles are
generally equipped with under-voltage protection. When only one indicator light on the
battery level indicator is on, you should turn off the power, use the pedal, and try to
charge the battery as quickly as possible to avoid over-discharge of the battery.


7. Do not open the lock for a long time when the battery is discharged, and turn it off
immediately when not in use. The internal resistance is large at the end voltage, and
the electrolyte concentration is very thin, especially the plate hole and surface are
almost neutral. The internal resistance tends to heat up during over-discharge, and the
volume expands. When the discharge current is large, obvious heat even occurs. Heat and
deformation. At this time, the concentration of lead sulfate is particularly high, and
the possibility of survival of the crystal branch short circuit increases. Moreover, at
this time, lead sulfate will crystallize into larger particles, that is, irreversible
sulfation, which will further increase the internal resistance and the charge recovery
ability Poor, even beyond repair. When the battery is in use, it should be prevented
from over-discharge, and “under-voltage protection” is an effective measure. In
addition, because the “undervoltage protection” of electric vehicles is controlled by
the controller, other devices outside the controller, such as voltmeters, indicator
lights, and other power-consuming appliances, are directly powered by the battery, and
the power supply is generally not controlled. Controlled by the electric vehicle, the
electric vehicle lock switch starts to use electricity once it is closed. Although the
current is small, overdischarge will occur if it is discharged for a long time for 1-2
weeks. Therefore, do not open the lock for a long time, and turn it off immediately
when not in use.


8. Avoid overcharging. When the charger shows that it is fully charged, it stops
charging, and it can’t be charged overnight or even days. Overcharging will cause the
active material of the plate to harden and fall off, and cause water loss and battery
deformation. The storage battery runs in high temperature seasons, and there is mainly
an overcharge problem. Therefore, in summer, the battery temperature should be reduced
as much as possible to ensure good heat dissipation, to prevent charging immediately
after exposure to the sun, and keep away from heat sources. Avoid overcharging. In
addition, the charger parameters should be selected to be well matched with the
battery. It is necessary to fully understand the battery’s operating conditions in the
high temperature season and the changes during the entire service life. Do not place
the battery in an overheated environment during use, especially away from heat sources
when charging. Cooling measures should be taken after the battery is heated, and the
battery can be charged only when the battery temperature returns to normal. The
installation position of the battery should be as good as possible to ensure good heat
dissipation. If overheating is found, stop charging and check the charger and battery.
When the battery discharge depth is shallow or the ambient temperature is high, the
charging time should be shortened.


9. Avoid long-term power loss. Long-term power loss will vulcanize the plates. In low
temperature conditions, charging mainly has the problems of poor charging acceptance
and insufficient charging, resulting in battery loss. At low temperatures, heat
preservation and anti-freezing measures should be taken, especially when charging
should be placed in a warm environment, which will help ensure sufficient electricity,
prevent irreversible sulfation, and extend the service life of the battery.


10. Prevent short circuit. Particular care should be taken during installation or use.
The tools used should be insulated. When wiring, the electrical appliances other than
the battery should be connected. After inspection, there is no short circuit. Finally,
the battery should be connected. The wiring specifications should be well insulated to
prevent overlapping pressure. rupture. It is forbidden to use the battery short-circuit
method to detect the charging status of the battery to prevent explosion and cause
casualties. When the battery is in a short-circuit state, its short-circuit current can
reach hundreds of amperes. The stronger the short-circuit contact, the greater the
short-circuit current, so all connections will generate a lot of heat, and the weaker
links will generate more heat, which will melt the connection and cause a short
circuit. The battery may locally produce explosive gas or the explosive gas accumulated
during charging. Sparks will be generated when the connection is fused, which will
cause the battery to explode. If the battery short-circuit time is short or the current
is not particularly large, the connection may not be fused Phenomenon, but the short
circuit will still cause overheating, which will damage the adhesive around the
connecting strip, leaving hidden dangers such as liquid leakage. Therefore, the battery
must not be short-circuited. When installing or using it, you should be especially
careful about the tools used. Insulation measures should be taken. When wiring, the
electrical appliances other than the battery should be connected first, and there is no
short circuit after inspection, and finally the battery should be connected. Good
insulation to prevent rupture caused by overlapping pressure.


11. Each start time cannot exceed 5 seconds. Avoid long-term high-current discharge of
the battery, which will greatly damage the internal structure of the battery. It is
recommended that the vehicle owner should not start more than 5 seconds each time. Two
consecutive starts are required, with an interval of 10 to 15 seconds.


12. Prevent exposure to the sun. Exposure to the sun will increase the temperature of
the battery and increase the activity of each active material in the battery, which
will affect the service life of the battery.


13. The discharged battery should be recharged in time and should not be left for more
than 12 hours.


14. Check and adjust the front and rear brakes. Before using an electric bicycle, check
and adjust the front and rear brakes. The front brake is controlled by the right brake
lever, and the rear brake is controlled by the left brake lever. The front and rear
brakes should be adjusted so that they can brake reliably when the left and right brake
handles reach half the stroke. The brake shoes are excessively worn and should be
replaced in time.


15. Check the lubrication of the chain before using the electric bicycle. Feel and
observe whether the chain shaft of the chain rotates flexibly and whether the chain
links are severely corroded. If it is corroded or the rotation is not flexible, add
proper amount of lubricating oil, and change the chain in serious cases.


16. Before riding an electric bicycle, check the tire pressure, the steering
flexibility of the handlebar, the flexibility of the front and rear wheels, the
circuit, the battery power, the working condition of the motor, the lights, and the

17. The standard load capacity of electric bicycles is 75 kg, and overloading should be
avoided as much as possible.


18. When using an electric bicycle in cold weather, you should try to drive with manual
or electric assistance, and pay attention to the battery power and voltage indication.
Generally, when the weather is cold, the depth of discharge of the battery should be
appropriately reduced, and the battery should not be driven under voltage. This is
because when the weather is cold, the charging capacity and discharge capacity of the
battery are reduced.


19. Electric bicycles should be stored in a cool, ventilated, dry place, away from
corrosive liquids and gases. When storing, the whole vehicle should be erected, the
tire pressure should be sufficient, heavy objects should not be loaded on the vehicle
body, and the battery should be stored separately

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