2010 Camaro Ss Battery Voltage Reading on Dash

Over-discharging your LiPo battery can lead to permanent battery deposition or fifty-fifty damage, therefore information technology's important to monitor your battery voltage while flying quadcopter and know when to land. In this article we will explain how you can monitor your battery usage in a drone.

Make certain to check out this article to find out more about how to look later your LiPo batteries.

Agreement Battery Voltage

The most common way of determining when to land is by checking battery voltage on the fly.

Your LiPo bombardment is fabricated up of cells, each ranging in voltage from 3.3V (absolute everyman voltage that should never be exceeded with gamble of damaging the cells) to 4.2V (Maximum rated voltage, above which they may spontaneously catch burn down), with the storage charge being 3.80V to iii.85V.

Equally 3.3V per jail cell is the lowest voltage, it's skilful practice to terminate discharging your LiPo further when it reaches three.5V just to be safe. Note that when you are flight, the battery is nether load, and so the voltage will sag. When you land, the voltage will come support a piddling.

1S – 3.5V
2S – 7.0V
3S – 10.5V
4S – 14.0V
5S – 17.5V
6S – 21.0V

However, for tiny whoops, because they use niggling 1S batteries, the voltage will sag more than bigger batteries. And so it'southward normal to land at 3.2V or even 3.1V per cell, and afterwards some 10/15 minutes of resting it volition come back to effectually 3.5V.

There are many ways of measuring bombardment voltage in a quadcopter.

Using Lipo Battery Voltage Warning or Buzzer

The nigh pop choice is a voltage alarm, which connects to the residue plug of a LiPo battery. They are cheap, and widely available. The buzzer is triggered when any i jail cell drops beneath a set threshold, east.g. 3.5V per jail cell.

Where to buy?

Banggood
Amazon

Congenital-in Voltage Sensor in flying controllers, FPV cameras and OSD

Many flight controllers, OSD modules, and even FPV cameras these days have built-in voltage sensor (a.k.a VBAT input). Past connecting your battery direct to this VBAT pin will let real-time bombardment voltage displayed in your FPV feed (OSD).

Voltage sensor on FPV Cameras (VBAT+ pivot)

Voltage sensor in MinimOSD – How to connect

The biggest trouble with monitoring voltage is that information technology decreases with fluctuations. For case when y'all practice a punch out, the motors draw a lot of amps, and the voltage drops off much faster than nether normal load, but when you lower your throttle the voltage will quickly recover again, this is called voltage "sag".

Poor quality LiPo batteries tend to have worse voltage sag nether heavy load, which leads to your low voltage alarms being triggered in mistake, before your pack is really sufficiently discharged for landing.

Instance of FC, FPV Camera and OSD modules that have voltage sensing adequacy:

Matek F405 AIO FC (find voltage via ability input)
Runcam Eagle 2 (notice voltage via VBAT pin)
Micro MinimOSD (detect voltage via VBAT pin)

Checking "mAh Consumped"

A current sensor allows you to come across how much current is existence drawn in real-time, and your flight controller tin gather this data and requite yous an gauge on how much battery capacity has been consumed. Since yous know the capacity of the battery, y'all are able to work out exactly how much juice is left in the pack.

"mAh consumed" is a much more accurate indicator than voltage to decide when you should state, because it doesn't fluctuate with throttle levels similar voltage does.

The 90% rule… You should land when you accept used xc% of your bombardment capacity! At this point the battery should theoretically be at around 3.5V – three.6V.

You should not however, rely solely on "mAh consumed".

The information from a current sensor resets to aught when the ability is disconnected, or when the FC restarts. If your battery is disconnected during a flying and lost previous "mAh consumed" information, your won't be able to determine the power left in the pack.

Therefore, this method but works with fully charged batteries. When using partially discharged batteries you won't know the exact initial capacity, this is why nosotros say it is best to have more one solution in identify, i.e. current sensor as well as voltage sensor.

Note: current sensor might be inaccurate upon first use, come across this guide for data on calibrating electric current sensor.

If y'all don't take a electric current sensor on your quadcopter, you can besides fix a "virtual current sensor" equally shown in this tutorial.

Timer

Timer is an extremely primitive method for determining when you lot should land. Retrieve bombardment usage can vary profoundly betwixt flights depends on how y'all fly. The effect is the aforementioned as with a car, the faster you bulldoze the more fuel you employ.

If you do a flying time test "at a hover", and then recharge the aforementioned pack and get and fly an aggressive acro or racing session, yous will often find that the battery provides a flying time of less than half of what was achieved during the hover test.

For me, timing flights is a last resort when at that place really are no better options.

The Dissimilar "Low Voltage Alarms"

There are many dissimilar forms of low voltage alarm you can have on your quadcopter.

Buzzer/Beeper

If yous have a cablegram connected to the flight controller, or if yous apply ane of the low voltage alarms that goes to the balance plug of your LiPo, it volition beep when the voltage is low.

OSD

For pilots that fly longer range, one might go into situations where the quadcopter is too far away for the buzzer on the quad to be heard. The best choice in this case would be to use an OSD to display the voltage in the FPV feed.

Personally I find using an OSD organisation platonic, mainly because I love seeing numbers! I can see in existent fourth dimension what the voltage is and program my flight accordingly. I much adopt this over hearing the loud complaints of the dying battery from a cablegram.

Telemetry

Like to OSD, Telemetry is another great way to monitor your battery usage, it can too exist a backup organisation used in conjunction with OSD.

Many radio transmitters can brandish battery voltage on the screen. The Frsky Taranis can even be configured to speak vocal alerts and read out voltages.

Edit History

December 2014 – article created
Aug 2016 – Updated info about telemetry
Dec 2017 – Updated info virtually current sensor

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Source: https://oscarliang.com/monitor-measure-battery-voltage-alarm-drone/