Li-polymer Battery

When we play RC Model , we will use different type of battery, for example,Li-polymer Battery ,Receiver Battery, Transmitter Battery, etc.

Do you understand their use?
Today i want to share some knowledge of Lithium Polymer Battery to you~~

About Lithium Polymer Batteries
In a nutshell, a battery consists of two metals immersed in an electrolyte solution. A chemical reaction takes place that causes electrons to flow from one metal to the other. This produces a voltage difference between the positive and negative poles. When a load (such as a motor) is placed between the two poles, electrons will flow through the circuit until the metals are chemically neutralized (battery dead).

The voltage produced between the two metals is called the electrochemical potential. This energy is directly related to the types of metal used in the battery.

Lithium is the lightest metal in the universe and has the highest electrochemical potential. Lithium would be perfect for making lightweight powerful batteries right?

Well, almost... Because lithium metal is very unstable, battery manufacturers began using non-metallic lithium-ions.

Using Lithium Polymer Batteries
Lithium ion polymer batteries harness an enormous amount of energy in a very small space. These batteries will explode if used improperly. I don't say this to scare you. When proper LiPo battery safety precautions are followed, these batteries are completely safe. Lithium polymer battery care can be broke down into three categories, which are discharging, charging and storage.

Storing LiPo Battery Packs
LiPo batteries should always be stored in a cool environment. In other words, don't leave them in your car with the windows up on a hot summer's day. Keep the battery in a cool location out of the direct sunlight. It is highly recommended that Lipo batteries be kept in a charging bag while be charged and while not in used. A charging bag is a very cheap form of insurance!

Advantages of LiPo Batteries
#1
Have nearly double the capacity with half the weight of NiCad or NiMH battery packs
#2
Retain charge significantly longer than NiCad or NiMH batteries when not being used
#3
Do not develop a "memory" as NiCad batteries do
#4
With LiPo cells in combination of series and parallel, LiPo packs can be built to power most all RC aircraft

Disadvantages of LiPo Batteries
#1
Have very short shelf life of two to three years
#2
Very sensitive to high temperatures
#3
Very sensitive to high and low voltages. Exceeding either will damage the battery
#4
Prone to explode if exposed to heat, or charged/discharged improperly


LiPo Battery Safety
LiPo Battery Packs are safe as long as they are used properly. The video below is an example of what will happen when a LiPo battery is used improperly.

#1
Always let your LiPo batteries cool to ambient temperature before charging
#2
Make sure your charger is designed specifically for Lipo battery packs
#3
Double check that your charger has counted the cells correctly and is charging at or below 1C charge rate
#4
Always charge your batteries on a solid non-flammable surface in a well ventilated area
#5
Always check your LiPo batteries for any damage after a crash. If the LiPo back is punctured or damaged in any way, don't use it.
#6
Always charge and store your LiPo batteries in a charging bag! Charging bags are relatively inexpensive and could potentially prevent your housing from burning down.
#7
Never, under any circumstances, leave your batteries charging unattended
#8
Never leave your batteries inside RC aircraft while charging

Hope u have a greating and safe memory with playing Rc Model.

www.rcecho.com