The battery is one of the key factors to ensure that the drone can take off
normally. How to increase its service life is a question that every drone owner
should ponder.
Both drone batteries and mobile phone batteries are lithium batteries,
which are the power source of the equipment and have higher requirements for
their safety performance. However, there are differences between the two.
Compared with mobile phone batteries, drone batteries have a significant feature
- discharge. The drone battery needs to be discharged to meet the requirements
of the drone in different environments, such as aerial photography. If there is
a strong wind, the battery needs to be able to discharge a large current to make
corresponding compensation to ensure the position of the drone. Because of
different usage requirements, drone batteries have relatively short
lifespans.
Six maintenance rules for drone lithium batteries:
1. Don't let it go
The discharge curve of the battery shows that at the beginning of
discharge, the voltage drop is relatively fast, but when it is discharged
between 3.9~3.7V, the voltage drop is not fast. But once it drops to 3.7V, the
voltage drop will speed up, and if the control is not good, it will lead to
over-discharge, which will damage the battery at light level, and cause the
machine to explode if the voltage is too low. Some model friends will
over-discharge every time because there are few batteries, and such batteries
are very short-lived. The strategy is to fly as little as possible for one
minute, and the lifespan will be one more cycle. It is better to buy two more
batteries than to fly the battery beyond the capacity limit every time. To get
the most out of the battery alarm, land as soon as the alarm goes off.
Second, not charging
2.1. Use a dedicated charger. This charger can be a Li-Ion or Li-Polymer
dedicated charger, the two are very close. Some mobile phone chargers can be
used to charge lithium polymer batteries. This will not damage the battery.
2.2. Accurately set the number of battery cells in the battery pack. For
the first few minutes of charging you have to look closely at the charger's
display, which shows the number of cells in the battery pack. If you don't know,
you shouldn't charge or use a charger you're familiar with.
2.3. Charge a new lithium battery pack for the first time, check the
voltage of each battery cell in the battery pack, and do the same work every 10
times of charging and discharging. Doing this is absolutely necessary, a battery
pack with unbalanced voltages will still burst when the correct number of cells
are chosen to charge. If the cell voltages in the battery pack differ by more
than 0.1 volts, you should charge each cell separately to 4.2 volts to make them
equal. If the voltage difference of the battery cells exceeds 0.1 volts after
each discharge, it means that your battery has failed and should be
replaced.
2.4. Don't charge when unattended
2.5. Use a safe location to place charged batteries and chargers.
2.6. Generally, there is no special instruction from the manufacturer, and
the charging current should not exceed 1C. Batteries that now support high
current discharge also support current charging over 1C. But it will greatly
shorten the life of the battery, and it is more cost-effective to buy 3
batteries to charge alternately than to buy one battery and have to fast
charge.
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