Notes

RC Battery & Charger</br>

<h1>RC LIPO BATTERY GUIDE: EXPLANATION, SAFETY, AND CARE</h1>


Without LiPo batteries, quadcopters and drones probably would not exist.


Why?


Due to the fact that no other battery gives as much energy while providing high quantities of present in so little of a plan. This means: longer trip times, much better ability to move, as well as quicker flying. To put it simply, even more fun.


Nonetheless, there is a great deal of complication regarding what terms indicate, exactly how to properly bill lithium polymer batteries, as well as exactly how to be safe when making use of batteries.


In this lipo battery overview, you'll obtain:


An extensive description of battery specifications-- Nominal and cut-off voltage, capacity, C-rating, interior resistance and also more

How to increase the life of your lipo battery

What to try to find in a lipo battery charger

Exactly how to utilize a lipo battery charger

Why balance charging is essential

The distinction between different sorts of battery connectors

Proper lipo battery safety as well as treatment

A reference of common lipo battery terms


So, allow's start with battery requirements.


<h2>Battery Voltage</h2>


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The very first specification that lots of people check out when selecting a battery is the voltage. As pointed out in my short article on motor Kv continuous, the rate of your motors is proportional to the voltage you provide to them so higher voltage batteries can transforming electric motors much faster than lower voltage batteries. The voltage of your battery will figure out the type of ESC's as well as electric motors that you will need to utilize.


Lipo battery voltage is defined by the variety of cells in collection. Each cell has a nominal voltage 3.7 V. Different battery firms mark their lipos in different ways but the majority of people often tend to describe their batteries as 1ST, 2S, FOUR, and so on


The following voltage graph shows each battery designation and the corresponding voltage.


1ST = 1 cell in series x 3.7 V = 3.7 V.

2S = 2 cells in collection x 3.7 V = 7.4 V.

FOUR = 3 cells in series x 3.7 V = 11.1 V.

FOUR = 4 cells in collection x 3.7 V = 14.8 V.

FIVE = 5 cells in collection x 3.7 V = 18.5 V.

6S = 6 cells in series x 3.7 V = 22.2 V


You might likewise see lipos that use a letter &quot;P&quot; to designate voltage. For example, 2S1P or 2S2P. This is not as typical with quadcopter batteries but you may see it with LiPo's implied for various other types of RC cars.


&quot; P&quot; stands for https://notes.io/CVsN of cells in parallel. 2S1P suggests &quot;2 cells in collection and also 1 cell in parallel.&quot; If a battery doesn't have a &quot;P&quot; then it is assumed to be &quot;1P.&quot; So 2S1P and also 2S are the same thing.


3S2P indicates &quot;3 cells in series and 2 cells in parallel.&quot; This battery would certainly have an overall of 6 cells with 2 identical teams of cells with 3 cells in series in each of those teams.


<h2> 7 Best Trickle Chargers for Your RC Car's Battery, 2020 and also Cut-off Voltage.</h2>


Consider the 2 battery voltage curves in Figure 1. An &quot;suitable&quot; battery and an &quot;actual&quot; battery are shown. https://uberant.com/article/1728871-what-you-need-to-know-about-rc-battery-&amp;-charger/ would certainly can giving continuous voltage for the entire time it is releasing up until it is completely released.


Actual batteries do not behave in this manner. Rather they begin at a higher voltage and afterwards their voltage will gradually decrease as the battery is discharged.


So while a suitable battery could have a voltage of 3.7 V throughout the whole time it is releasing, an actual battery will certainly start at the optimum voltage of 4.2 V As it discharges, maintain lowering.


How far will it decrease? If you allow it, it will totally discharge to absolutely no volts.


Nevertheless:.


Battery makers generally suggest you do not discharge your battery below a specific minimum voltage. This minimum voltage is called the cut-off voltage. Many producers recommend the cut-off voltage for lipos to be 3.0 Volts.


Almost talking, this suggests you must establish your voltage alarm system to something greater than 3.0 V to make sure that you can safely land your quadcopter before it goes down below 3.0 V Many individuals set their alarms to 3.3 V.


<h2>Battery Capacity.</h2>


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Battery capability is measured in Amp-hrs or milliamp-hrs. It provides you a sign of the total energy that a battery can keep. Generally, the higher the capability, the longer your battery will last.


Making use of the gas storage tank example, a high capability battery has a large gas tank that permits it to store a great deal of gas.


The very best method to comprehend the ability of lipos is to consider exactly how it is gauged. The basic procedure is to take a battery and determine what constant existing creates the lipo to go down listed below the battery cut-off voltage in exactly 1 hr.


The ability is then just that current times 1 hour.


So a 3000 mAh capability battery will certainly drop from complete voltage to the cut-off voltage in 1 hr if you discharge the battery at 3000 mA (3 Amps). 3 Amps x 1 hr = 3 Amp-hrs = 3000 mAh.


There is one crucial thing you require to note ...


The capability of a battery decreases as the existing draw increases. This indicates that if your ability is 3000 mAh for a consistent 3 Amp existing draw, after that your capacity will certainly be less than 3000 mAh if you draw a continuous 6 Amps or a constant 30 Amps.


I've seen a great deal of explanations of capacity that don't inform you this. You will certainly usually see it created that if your battery's ability is 3000 mAh, then that suggests you can draw 3 Amps for 1 hour, 6 Amps for 30 minutes, or 30 Amps for 6 minutes. In general this is not the situation.


In order to tell how current impacts ability, you need to look at a lipo battery discharge curves. Many good battery datasheets will certainly reveal different discharge contours for various constant current attracts.


This number reveals the discharge contour of an ONE, 1700 mAh, 35C battery (much more on what &quot;35C&quot; suggests later). Each line stands for a various continuous current (42.5 A, 47.6 A, 51.0 A, etc.). This number shows us that for a provided cut off voltage the discharge capability decreases as the current draw increases.


In this example, for a cut off voltage of 3.0 V, the capacity at 1.7 A (1C) is 1700 mAh and I would certainly approximate the capability at 42.5 A (25 C) to be regarding 1630 mAh and the capability at 68.0 A (40 C) to be about 1460 mAh.


So the 2 vital points to keep in mind about capacity are:.


Ability informs you the amount of existing that the battery is capable of supplying for 1 hr.

If you discharge your battery at greater currents than that, your capacity drops.


( Note that Amp-hrs is not a step of power. Power is measured in Watt-hrs. If you think that the battery is discharging at consistent voltage, you might determine energy from that. Nonetheless, as we learned in the previous area, batteries do not discharge at consistent voltage.).


Here's my website: https://notes.io/CVsN