Usage and maintenance methods of UAV lithium battery

In recent years, UAV aerial has slowly come into the public. Its unconventional perspective, convenient operation and simple structure won numerous image creation institution, and even has entered ordinary families.

The current mainstream of aerial drones for rotor machine, straight and fixed wing and their structure determines that can travel for a long time is fixed, but fixed wing to take off and land demand is high, can't hover in flight factors often can only be used in surveying and mapping on the requirement of image quality is not high. And although many rotor machine, straight flight time is short, but in the complex type of take-off and landing, smooth flight, can hover, wind resistance ability is good, operation is easy to fit in is the most used in image creation. The two models on the power energy is given priority to with battery, can also direct fuel engine power, but the oil produced by mechanical vibration and a greater risk of flight greatly reduce its usage. To cells with more and more popularity in unmanned aerial, a team is equipped with a variety of battery is more than a dozen pieces of less, many dozens of pieces, they fly tirelessly for motor, electric adjustment, control, passing on the OSD, figure, a receiver, remote control, monitor and other aircraft of various electrical components for power security. In order to better and safer flight, to understand the parameters of the battery, use, maintenance, charge and discharge, etc., so as to ensure the smooth operation of the aerial every time the task, let us know about the battery in the aerial silently together.

Now in the aerial lithium battery known as the "Lithium polymer battery"(Li - polymer, also known as the polymer lithium battery), generally referred to as lithium electricity. Lithium polymer batteryWith high energy density, miniaturization, ultra-thin, lightweight, and high safety and low cost, and other obvious advantages, is a new type of battery. In shape, lithium polymer battery with ultra-thin characteristics, can match the needs of the various products, made into any shape and the capacity of the battery, the outer packing is blister pack, is different from the metal shell of liquid lithium electricity, internal quality hidden trouble can be displayed by deformation of the outer packing immediately, such as ballooning.

Begin from the basic parameters of the battery under the understanding, with a 22.2 V10000mAh aerial power battery. For example, it is from 6 piece rated voltage of 3.7 V, the capacity of 10000 mAh lithium batteries in series, which often say 6 s1p.There are 6 s2p battery, is made up of 12 5000 mAh battery in parallel and in series. To illustrate some here, 6 s1p than 6 s2p safety coefficient is higher, because 1 p than simple structure of 2 p is doubled, 1 p a higher price, of course.

Model aircraft with lithium electricity, single cell voltage is 3.7 V rated voltage, voltage gain from average work. Monolithic lithium batteries the actual voltage is 2.75 ~ 4.2 V, marked on the lithium electricity discharge capacitance is 4.2 V to 4.2 V power. Lithium electricity must be kept in 2.75 ~ 4.2 V use this voltage range. Belong to excessive discharge, such as voltage below 2.75 V li-ion battery swells, internal chemical liquid crystal, the crystal may be pierced internal structure layer caused by short circuit, may even make li-ion battery voltage to zero. Monolithic when charging voltage is higher than 4.2 V belongs to overcharge, internal chemical reaction is too fierce, lithium electricity will swell, cheerily if continue charging swells, burning. So be sure to use comply with safety standards of formal charger to charge the battery, at the same time it is strictly prohibited to privately refitting of charger, it may cause serious consequences!

To tip a little, remember - aerial power battery single chip cannot be used batteries voltage of 2.75 V, the battery cannot provide effective power to aircraft in flight, in order to secure flight, monolithic alarm can be set to 3.6 V voltage, such as the voltage, or close to the voltage, fly hand action will be executed immediately return or landing, try to avoid Fried machine as a result of the battery voltage is insufficient.

The discharge of the battery capacity is multiples (C) to represent, it mean up to a maximum of how according to the nominal capacity of battery discharge current. Common aerial batteries are 15 C, 20 C and 25 C or C higher number of cells. As for the C number, in a nutshell, 1 C for different capacity of the battery is not the same.1 c is refers to the battery 1 c discharge rate discharge can continue to work for 1 hour. Example: 10000 mAh capacity of the battery last for 1 hour, then the average current is 10000 mAh, namely 10 a, 10 a 1 c is the battery. Such as battery with 10000 mah25c again, then the maximum discharge current is 10 a x 25 = 250 a, if it is 15 C, then the maximum discharge current is 10 a x 15 = 150 a, from now on you can see the plane in the dynamic flight, while C number, the higher the battery can provide more current support according to the power consumption of the moment, its discharge performance will be better,, of course, the higher the C number, the battery price will rise. To note here don't exceed the battery discharge C number of discharge, otherwise the battery could be scrapped or burning explosion.

On the use of batteries to adhere to the six "no", the correct method of use is one of the best ways to extend battery life.

1, but

Some of this there are requirements for the charger, the charger after full power of the function is not perfect, lead to single battery is 4.2 V is not stop charging, in addition, some charger use after a period of time, because components ageing, also prone to stop problem, therefore, when the lithium polymer battery must be someone to look after, when found the charging time is too long, to check whether the charger failure, if failure to remove the battery as soon as possible, otherwise the lithium polymer battery overcharge, then affects the battery life, light weight, appear directly burst into flames.

In addition to remind everybody, must according to the regulations of the battery when charging charge number C or lower C, shall not exceed the prescribed charging current.

2, but put

Battery discharge curve indicates that just began to discharge, the voltage drop is faster, but the discharge between 3.9 ~ 3.7 V, the voltage drop. But once fell to 3.7 V, the voltage drop speed will be faster, bad control leads to discharge, light damage to the battery, or the voltage is too low to cause the airline. Some friends die because the battery is less, so every time they fly, the battery was short-lived. Strategy is, as far as possible to fly a minute, life is much fly a cycle. It is better to buy two pieces of batteries, the battery every time fly to exceed capacity limit. To make full use of the battery alarm, a alarm should be down as soon as possible.

3, with electricity save

Fully charged battery, cannot be full electricity save more than 3 days, if you don't put off for more than a week, some cells directly bulge, some cells may temporarily don't drum, but several times after full electricity saving, the battery may be scrapped directly. The right way is, therefore, recharging after received the mission, such as in 3 days after the battery no mission, monolithic voltage to charge, please to preserved from 3.80 V to 3.90 V. Again after good electrical charge for various reasons did not fly, also want to be in full within 3 days after discharge of the battery to 3.80 ~ 3.90 V.If don't use the battery in three months, will continue to save the battery charge and discharge time, which can extend battery life. Batteries should be stored in a cool environment, long-term storage battery, best can in sealed bags or sealed box, suggest the environment temperature is 10 ~ 25 ° C, and dry, no corrosive gas.

4, no damage to the skin

The husk of the battery is to prevent the battery explosion and leakage of the important structure of the fire, the aluminium skin of lithium polymer battery will directly lead to damaged battery fire or explosion. The battery to should take put down gently, fixed the battery on the plane, cable tie to tighten. Because there will be doing a large dynamic flight or fall off, the battery will be thrown out because of the cable tie is not tight, so it is easy to cause the battery damaged skin.

5, do not short circuit

This kind of situation often happens in the process of battery welding line maintenance, and transportation. A short circuit will directly lead to battery lighter or explosion due to fire. When found used batteries in after a period of time break line situation need to welding line, paying special attention to soldering iron don't touch the battery of the positive and negative. Also in the process of transportation battery, the best thing to do is, each cell all valve bag and placed on a separate set of explosion-proof cabinet and prevent for the course of carriage, a piece of the battery caused by turbulence and collision of the positive and negative at the same time meet any other conductive material and short circuit or broken skin and short circuit.

6, don't catch a cold

This principle, a lot of friends and fly to ignore. Often have a cold weather in the north or high altitudes, at this time if the battery is placed outside for a long time, its discharge performance will be greatly reduced, if even with normal temperature state of flight time to fly, it will be a problem. The alarm should be the voltage (such as single chip alarm voltage to 3.8 V), because in low temperature environment down fall will be very fast, alarm rang down immediately. Have to give the battery do heat preservation processing, before takeoff batteries are stored in a warm environment, such as house, car, heat preservation box, etc. Fast installation to take off the battery and perform a flight mission. Flying at low temperature, shorten time to half its normal temperature state as far as possible, to ensure flight safety.

At present, the rc lithium electricity brand and a lot of more phyletic, model aircraft power need to choose according to their matching battery, so as to ensure the smooth operation of electrical components. Don't buy some cheap 3 without battery, also don't buy batteries do batteries, more not to modified the battery. If the battery bulge, broken skin, filling with electricity and other issues, please stop using it. Batteries are consumables, but it provides the energy for flying silently, we take the time to pay attention to it, understand it, love it, to better, safer every aerial flight service for us. Can also be thought of, now that this battery can fit into a armband, so in the future after solve the problem of the thickness, size, and waterproof and dustproof, its directly incorporated into the cloth inside what is no longer a dream.

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