Maintenance analysis of drone lithium battery

The discharge curve of the battery states that at the beginning of the discharge, the voltage drops relatively quickly, but when the discharge reaches between 3.9V and 3.7V, the voltage drops not fast. But once it drops to 3.7V, the voltage drop speed will accelerate, and poor control will lead to overdischarge, which will damage the battery in the slightest, and cause a bomb if the voltage is too low. Some model friends will over-discharge each time because of the small number of batteries. Such batteries have a short lifespan. The strategy is to fly one minute as little as possible, and the life span will fly one more cycle. It is better to buy two more batteries than to fly the battery beyond the capacity limit every time. To make full use of the battery alarm, the alarm should be dropped quickly. 2. Overcharge 1. Use a dedicated charger. This charger can be a lithium ion or lithium polymer special 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. Precisely set the number of battery cells in the battery pack. In the first few minutes of charging, you need to carefully observe the display of the charger, which will display the number of batteries in the battery pack. If you are not sure, you should not charge or use a charger you are familiar with. 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 after charging and discharging. This is absolutely necessary. A battery pack with unbalanced voltage will still burst when the number of batteries is correctly charged. If the battery cell voltages in the battery pack differ by more than 0.1 volts, you should charge the voltage of each battery to 4.2 volts to make them equal. If the voltage difference of the battery cell exceeds 0.1 volts after each discharge, it means that your battery is now defective and should be replaced. 4. Don't charge if unattended. 5. Use a safe location to place the rechargeable battery and charger. 6. Generally, there is no special explanation from the manufacturer, and the charging current should not exceed 1C. The batteries that currently support high-current discharge also support current charging beyond 1C. But it will greatly shorten the life of the battery. It is more cost-effective to buy three batteries to replace and charge than to buy one battery and have to charge quickly. 3. If you are dissatisfied with the charge, save the fully charged battery. It cannot be stored at full charge for more than 3 days. If you don’t let it go for more than a week, some batteries will swell up straight, and some batteries may not swell temporarily. Maybe it will be invalidated straight away. Therefore, the correct way is to charge it after receiving the flying mission. If there is no flying mission within 3 days after the battery is used, please charge the single-chip voltage to 3.80~3.90V for storage. After being charged, the battery will not fly due to various reasons, and the battery must be discharged to 3.80~3.90V within 3 days after the charge is over. If the battery is not used within three months, keep the battery after charging and discharging it once to extend the battery life. The battery should be stored in a cool environment. When storing the battery for a long time, it is best to put it in a sealed bag or a sealed explosion box. The recommended ambient temperature is 10~25°C, and it is dry and non-corrosive. . 4. Do not damage the packaging The outer packaging of the battery is an important structure to guard against battery explosion and leakage. The damage of the aluminum plastic film of the lithium polymer battery will directly cause the battery to catch fire or burst. The battery should be handled gently, and the cable tie should be tightened when fixing the battery on the airplane. As there may be cases in which the battery may be thrown out due to the tightness of the tie when flying or crashing, it is also easy to cause damage to the battery skin. 5. No short circuit This situation often occurs during battery welding wire protection and transportation. A short circuit will cause the battery to ignite or burst into flames. When it is found that the battery is disconnected after a period of use, it is necessary to weld the wire from the beginning, pay special attention to the electric soldering iron not to touch the positive and negative electrodes of the battery together. In other processes of transporting batteries, the best way is to put each battery in a self-sealing bag and put it in an explosion-proof box. Beware of fluctuations and collisions during the transportation process, which will cause the positive and negative electrodes of a battery to touch other batteries together. Conductive substance and short circuit. 6. The principle of no low temperature is ignored by many flying friends. In the north or high-altitude areas, there are often low-temperature weather. At this time, if the battery is left outside for a long time, its discharge function will be greatly reduced. If you still need to fly at the time of flight at normal temperature, then there will be problems. At this time, the alarm voltage should be increased (for example, the single-chip alarm voltage is adjusted to 3.8V). Because the voltage drop will be very fast in a low temperature environment, the alarm will drop as soon as the alarm sounds. In addition, the battery must be kept in a warm environment before taking off. For example, in the house, in the car, in the incubator, etc. To quickly install the battery when taking off, and perform the flying mission. When flying in low temperature, try to shorten the time to half of the normal temperature state to ensure safe flight. Industry insiders also added that when buying drone batteries, everyone should not choose blindly. They should consider factors such as brand, market popularity, and evaluation functions, and consider choosing a battery that is suitable for their drones. Disclaimer: Some pictures and content of articles published on this site are from the Internet. If there is any infringement, please contact to delete.