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radio controlled aircraft - lipo batteries - how to use and care for them

by:HGB     2019-10-14
LiPo Do\'s and don\'s have a lot of confusion about LiPo batteries, especially after the problem that they are on fire.
It\'s mainly because people don\'t know how to use LiPo batteries and what to do and what not to do.
Hopefully, these tips will help people move in the right direction.
LiPo batteries are large in the world of rc aircraft, rc jets and radio control models, in which case, the advantages of light weight and greatly increased running time can be a good reason for rc hobby prices.
However, lithium polymer-
A specific charger is required to avoid fire and explosion.
Fire may also occur if the battery is short
When the huge current passes through the cell in an instant, the circuit is short-circuited. Radio-
Control enthusiasts must take special precautions to ensure that their battery leads are properly connected and insulated.
In addition, a fire may occur if the cell or package is punctured.
Using LiPo correctly and charging correctly is not a trivial matter.
There are many things to consider before using lithium batteries for e-commerceflight.
But nothing is more important than safety!
Safety is important!
Do not use lithium batteries until you are willing to comply with all safety precautions.
If you just plug in the battery and don\'t worry, run it directly, charge it, and then LiPo technology won\'t work for you!
Lithium batteries must be charged in a very different way than NiCD or NiMH batteries.
First of all, they need a special charger dedicated to charging lithium batteries and don\'t use NiCD or NIMH chargers on LiPo batteries!
You must use a lithium ion or lithium polymer charger designed to handle the number of batteries you are trying to charge.
Charging a lithium battery is the most dangerous part of using a lithium battery.
Extra care must be taken when charging to avoid damage to the battery or worse causing the battery to catch fire.
It is important to set the charger to the correct voltage or the number of batteries.
Since the lithium battery directly causes a fire, please be responsible for charging the lithium battery.
Here are some important guidelines for using LiPo batteries: 1.
Use only the charger approved for lithium batteries!
You should see Li clearly. Po, Li-
Mark on the charger or ion specified in the charger Operation Manual.
The two batteries are charged exactly the same way. 2.
Make sure you have the correct number of batteries set on your charger.
This is important because it describes the total voltage of the package.
When you start charging, make sure the charger shows the correct number of batteries.
If you don\'t know how to do this, please consult your charger manual or buy a charger that displays this information.
The number of charges per battery shall not exceed 4. 2 volts.
Overcharging can cause the chemical composition of lithium to become unstable, which may result in a flame from the battery. 3.
Balance to charge your fat.
If the cell is not within 0, the packaging imbalance will cause the cell to be damaged.
1 v each other.
If there is no balance option for your charger, we strongly recommend you to buy one.
Depending on the current you get from LiPo, you may want to balance the backpack every 3 times
5 flights to ensure that 4 are charged per community.
2 volts, so that they are all equal.
If the battery in the package is unbalanced after each flight, you may have a faulty battery.
Balance the cells more often to see if you can correct the problem.
If the problem persists, consider replacing the package. 4.
Don\'t let your battery be uncharged.
This is the primary cause of a house fire.
If something goes wrong, you want to deal with it quickly! 5.
Charge your battery on a surface that will not be damaged by fire.
If LiPo is on fire, you want to avoid the problem spreading to other surfaces.
Ventilation fire safe, pyrex dishes with sand at the bottom, fireplace, flowerpot are all great options to consider.
The most practical solution today is to buy a LiPo security bag for charging. 6.
Never charge more than 1C unless the battery pack supplier clearly proves it safe to do so.
If you are not sure, keep it below or equal to 1C of the battery capacity rating.
Many LiPo-related fires are due to the fact that people charge at a larger current than LiPo\'s rated capacity to handle.
The concept of fast charging should never be applied to LiPos! 7.
Never drain less than 3 LiPo cells.
3 V per battery instead of the total package voltage.
Most ESC will do a soft cut today. off at 3.
3 V per battery, hard cutoff at 3. 0 volts per grid.
However, some people will not give you a warning.
The best advice is to fly with a timer, monitor the voltage, and adjust the flight time if needed. 8.
Never pierce the cells!
If a cell balloon quickly places it immediately in a fire-safe place.
If this happens, smoke and heat in the grease will clear all other items and be ready for the appearance of the flame!
If many hours have passed (days)
The package is still expanding but not burning, slowly drain the package and handle it in a proper way. 9.
If your lithium battery crashes, they can be damaged internally!
The package looks good, but it may only be a timely balloon.
If you have crashed, please take care to remove the battery pack from the model and watch it carefully for the next 30 minutes.
Make sure the packaging is cool before shipping. 10.
Charge the battery in a well ventilated open air area.
If the battery does become unstable, you want to drain harmful smoke and materials from the room. 11.
When you fly or charge the battery, put a bucket of sand nearby.
This is an economical and effective way to put out fire. 12.
Don\'t think it won\'t happen to you!
Safety is not an accident!
Some useful tips for keeping fat healthy: 1.
Cool your backpack before charging.
For the internal chemistry of the battery, it is very important that you do not overheat when charging, or worse, because only more energy and heat are put back into the battery.
So wait 30 minutes to 1 hour before charging your bag again. 2.
Stick to the 80% rule!
This basically means never exceeding 805 of its discharge rate, and never draining more than 80% of LiPo\'s battery pack capacity.
When a person discharges more than 80% of the capacity, it starts to cause a lot of internal heating in the cells and basically starts to devour itself.
So basically, if you have a 2200 pack, you want to just put it back 1760 when charging.
Most Chargers display the number of mah when charging, so that you can adjust your flight time, gear set, etc based on this number to allow your fat to last longer. 3.
If you do not use the package for a week or two of the last charge, please drain the package to the storage level.
This will help make the package last longer, especially if you don\'t fly every week.
If you keep the fat fully charged for a long time, it will start to cause deterioration inside the cell.
For this reason, most new Chargers now have storage discharge options.
If you don\'t have this option, just drain between 3. 8 to 3. 9 volts per battery.
You can then store them in a safe place.
Some people also refrigerate the packaging when storing. 4. Break-In (Cycle-In)your LiPo!
LiPos don\'t take a break as long as Nitro motors do, but they do take several cycles to reach their full power potential.
After a few charge/discharge cycles, you will build the chemistry in the package and after that they will start to perform a little better.
So ideally a pack should ride 3-
Charge before you make the most of the potential of the battery.
There are several ways to cycle the package, just charge/discharge on the LiPo charger.
If you use them on a helicopter, you can do a short 2-
Hover flights and top up in 3 minutes.
What\'s going on with puffed?
When you wrap LiPo up, the lid looks like it\'s vacuum sealed together.
If after several cycles, they may produce a little air between cells, which may not be completely destroyed.
I mean, we\'re talking about millimeters or so, then you\'re likely to keep using them.
It won\'t get worse as long as it\'s monitored.
If the battery expands like a bicycle inner tube, dispose of it.
How to deal with LiPo?
There are several suggested ways to treat fat.
The most common thing is to take a bucket and fill it with a mixture of salt water.
Put LiPo into the salt water and think that the salt water will produce a low conductive current to drain the LiPo battery.
Secondly, salt water penetrates into cells and neutralizes chemical reactions. Fire risk?
The most common cause of LiPo battery fire is improper charging.
Whether it\'s using incorrect charging, wrong battery count settings on the charger, or charging the battery to more than 4. 2volts each.
What happens at this point is that the chemicals continue to enter the thermal overload fault and start heating, causing hydrogen to drain, causing the hydrogen to expand to the point of rupture, and then spewing out the fire.
The best solution here is to buy some LiPo-
A safe charging bag can be charged or stored in a potentially fragile package.
Secondly, you never want to shorten the battery or pierce the shell, as this also leads to the chemical reaction explained above and can lead to a fire risk.
LiPos will not burn in storage unless the package has some damage on the outside or inside.
So you should have no problem if you charge carefully and use the package.
Hopefully this helps people understand how to use LiPos.
If you follow these guidelines, you should have a great success with LiPos and enjoy the RC hobby.
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