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How to use lithium batteries and extend their lifespan

by:dcfpower     2021-03-21

The lithium battery pack used in aerial photography is called 'lithium polymer battery' (Li-polymer, also known as polymer lithium battery pack), generally referred to as lithium battery pack. Lithium polymer battery has many obvious advantages such as high energy density, smaller size, ultra-thinness, light weight, high safety and low cost, and is a new type of battery. In terms of shape, lithium polymer batteries have ultra-thin characteristics, which can be made into batteries of any shape and capacity to meet the needs of various products. The outer packaging is aluminum-plastic packaging, which is different from the metal shell of liquid lithium batteries. The internal quality is hidden. It can be immediately shown by deformation of the outer packaging, such as bulging.

In the use of batteries, we must adhere to six 'no's. Correct use is the best way to extend battery life.

1. Don’t charge

This has requirements for chargers. Some chargers have imperfect power-off function after being fully charged, which leads to the monolithic battery being fully charged to 4.2V and the charging has not stopped. In addition, after some chargers are used for a period of time, due to the aging of the components, they are also prone to the problem of non-stop charging. Therefore, the lithium polymer battery must be looked after when charging. When the charging time is found to be too long, the charging must be manually checked. Whether the device is malfunctioning, if there is a malfunction, unplug the battery as soon as possible, otherwise the lithium polymer battery will be overcharged, it will affect the battery life in the slightest, and it will directly explode and catch fire.

In addition, remind everyone that when charging, you must charge the battery according to the specified charging C number or a lower C number, and the specified charging current must not be exceeded.

2. Do not discharge

The discharge curve of the battery shows that at the beginning of the discharge, the voltage drops relatively fast, 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 increase. Poor control will lead to over-discharge, which can damage the battery in the slightest, and cause a bomber if the voltage is too low. Some model friends will over-discharge every time they fly because they have fewer batteries. Such batteries are very short-lived. The strategy is to fly one minute as little as possible, and one more cycle of life. It is better to buy two more batteries than to fly the battery to exceed the capacity limit each time. To make full use of the battery alarm, you should land as soon as possible.

3. Save when dissatisfied with power

A fully charged battery cannot be stored for more than 3 days if it is fully charged. If it is not discharged for more than a week, some batteries will be swollen directly, and some batteries may There will be no drums for the time being, but after several full storage, the battery may be directly scrapped. Therefore, the correct way is to charge it after receiving the flight mission. If there is no flight mission within 3 days after the battery is used, please charge the single chip voltage to 3.80~3.90V and save it. If the battery does not fly due to various reasons after it is fully charged, the battery should be discharged to 3.80~3.90V and stored within 3 days after being fully charged. If the battery is not used within three months, continue to store 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. No damage to the outer skin

The outer skin of the battery is an important structure to prevent battery explosion and leakage. The damage of the aluminum-plastic outer skin of the lithium polymer battery will directly cause the battery to catch fire or explode. . The battery should be handled gently, and the cable tie should be tightened when fixing the battery on the airplane. Because there is a possibility that the battery will be thrown out due to the tightness of the tie when flying in a big dynamic flight or crashing, which will easily cause damage to the battery skin.

5. No short circuit

This situation often occurs during battery welding wire maintenance and transportation. A short circuit will directly cause the battery to ignite or catch fire and explode. When you find that the battery is disconnected after a period of use and you need to re-weld the wires, pay special attention to the electric soldering iron not to touch the positive and negative electrodes of the battery at the same time. In addition, in the process of transporting batteries, the best way is to put each battery in a ziplock bag separately and place it in an explosion-proof box to prevent the positive and negative electrodes of a battery from touching at the same time due to bumps and collisions during transportation. Other conductive materials short-circuit or break the skin and short-circuit.

6. Don’t catch cold

This principle is ignored by many flying friends. There are often low temperatures in the north or high altitude areas. At this time, if the battery is left outside for a long time, its discharge performance will be greatly reduced. If you need to fly with the flight time at normal temperature, it will definitely cause 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, and the alarm will drop immediately when the alarm sounds. In addition, the battery needs to be kept warm. Before taking off, the battery should be stored in a warm environment, such as in the house, in the car, in the incubator, etc. To quickly install the battery when taking off, and perform the flight mission. When flying at low temperatures, try to shorten the time to half of normal temperature to ensure safe flight.

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