Questions tagged [battery]

An electric battery is a device consisting of one or more electrochemical cells that convert stored chemical energy into electrical energy.

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4
votes
3answers
388 views

Best power solution for my robot

I've built quadruped robot which is using 12 servos (TowerPro SG90 Servo) and Raspberry Pi (model B 1). Right now I'm "feeding" it with 5V 2.5A charger. How can I make it un-tethered? What should I ...
2
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3answers
305 views

Are there any Lithium Ion battery monitors designed for hobbyists (quadcopters)?

I have a friend who is getting into quadcopters and being the good techie buddy, I'm trying to find the right technology for battery monitoring so his expensive machine does not fall out of the sky ...
2
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1answer
2k views

How do I if know my quad is powerful enough to take off vertically smoothly and how do I calculate max Thrust(g) for given current(A) and voltage(V)?

If I build my quadcopter with the following components, will it take off vertically smoothly? Frame: F450 glass fiber and polyamide nylon [280g] Landing Gear: High Landing Gear for F450 [90g] ...
3
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2answers
1k views

Mechanical robustness/shock resistance LiPo batteries

How mechanically robust are LiPo batteries? How much force or acceleration can they maximally withstand before failure? What is their (mechanical) shock resistance? For some electrical components ...
2
votes
1answer
176 views

What charger to use with my ZIPPY Compact 6200mAh 4s 40c Lipo MultiRotor Battery [closed]

Hello I am trying to build a Quadcopter for a school project and I need to finish quick before our mission trip because I was asked to finish it before then so that I could take it. But I am having a ...
0
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2answers
206 views

When to use multiple batteries vs a UBEC

When should you use multiple separate batteries vs a single battery with multiple UBECs? I'm trying to design the power system for a small 2-wheeled robot. Aside from the 2 main drive motors, it also ...
2
votes
1answer
2k views

Using DC motor as a generator to recharge battery of my robot

I am trying to recharge my 12V lead acid battery with a 12V DC motor. I am using the battery to power the robot when it climbs. When it descends, I notice that I dont need to apply reverse voltage ...
0
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1answer
299 views

Powering my robot with 12V battery which is charged by a gas/petrol generator while the robot is operating?

A have designed a robot to perform tasks in farms. But the problem now is I'm not sure on the best way to supply continuous power to my robot. All the motors are rated at 12V and only Arduino and a ...
0
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1answer
260 views

Can i charge a lipo nano tech battery over imax b3 charger

Can i charge a lipo nano tech battery over imax b3 charger. 2650mah 35/70c 3s is the battery
4
votes
2answers
70 views

How do I dispense a greasy fluid?

I'm a agricultural engineering student and complete newbie trying to build a simple mechanism attached to a drone that dispenses a grease-type fluid. However, since I'm not familiar with the field, I'...
0
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1answer
155 views

Drone Battery Question

Background: 6 propeller drone w 20C 3s 6400 mAh 11.1 liPO battery 4 propeller drone w 25C 2s 5000 mAh 7.40 liPO battery Behavior: Drone 1 flies with ease Drone 2 struggles hover 2-3 inches above ...
0
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1answer
80 views

Estimation of Battery Life Time From PWM Signals in a Quadrotor

Is there any way of estimation the battery life from pwm outputs which goes to motors in microcontroller level. I'm planning to estimate path range with this. Microcontroller, sensor and other ...
-1
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1answer
176 views

How to reduce battery power 10v 1.5A to 6v 1.5A [closed]

What's least complex way to reduce power from a 10V 1.5A battery to 6V 1.5A Thank you!
2
votes
1answer
40 views

Extending iCreate battery power for auxilliary equipment

I plan to use the icreate as a platform to carry a tablet, or notebook PC and want to have power for some time so I need more than the 3000 mAh battery. I want all to be powered from same battery ...
0
votes
1answer
24 views

Wiring necessary to route power from any one of several rechargeable batteries

I'm looking for my robotics project to draw its power from one of 3 rechargeable batteries; basically whichever has the most "juice" in it. From the initial research I've already done, I believe I ...
0
votes
1answer
93 views

How to determine how long a battery will power a robotic circuit for?

Obviously robotic circuits draw different amounts of power/current. So given the same battery, say, a 9V, then connecting it to 2 different circuits will deplete it at two different rates. Robot/...
2
votes
1answer
170 views

How to decide between LiPo or LiFePo for robot battery

When choosing a battery for a robot, should you use a LiPo or LiFePo? For LiFePo, the pros: can deliver higher sustained amps many are built to be drop-in replacements for lead-acid batteries and ...
2
votes
2answers
2k views

How to provide power to a robot/raspberry pi?

I'm building a robot and powering it with a Raspberry Pi. I am looking at this battery pack, but I am flexible with which one to use. My problem is that I need to be able to charge the robot while it ...
3
votes
1answer
720 views

Battery system for a robot with a RaspberryPi or microcontroller

I'm building a robot which is actually a rotating ball. All my circuitry will be inside this ball. I'm using a Raspberry Pi as the brains. Apart from Raspberry Pi, I've an H-bridge IC (L298N), a 6-...
2
votes
1answer
379 views

Powering a multirotor with dedicated batteries for each motor

I'm currently thinking of extending the battery life of my quad by powering each motor and ESC individually. I will be using 1 dedicated battery for each motor, and 1 dedicated battery for the flight ...
1
vote
1answer
50 views

What type of Antennas to use for XBeePRo 2.4Ghz

I am planning to use 2.4Ghz XBeePro 63mW Devices for a project that requires a coverage area of around 1.5-2km. When i go to select an antenna there are various options like Circular,Virtical, ...
0
votes
1answer
102 views

Linear or Switching Power Supply for a Embedded Project

Power Block Designing noob here. I have a beaglebone 2x XbeePro(s) and another 500mAh device connected to the board i am building a PCB Around. I need some advice on weather to use Linear Voltage ...
0
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2answers
86 views

Risk of overloading motor controller

I bought 2 brushed motor controllers from China for my hobby-weight battle robot (http://www.banggood.com/ESC-Brushed-Speed-Controller-For-RC-Car-Truck-Boat-320A-7_2V-16V-p-915276.html). These are ...
7
votes
4answers
4k views

Robot docking for self-recharging

I want to build a simple obstacle avoider robot, but this time I want it to be self-recharging so I am building a dock for this purpose, so I want it to be able to locate the dock and go for it when ...
0
votes
3answers
81 views

Can a 5S LIPO battery be changed to a 3S and a 2S?

Newbie to robotics here! I bought a 5S LIPO but now realise that it is overkill. And these things are expensive! So, given that (as far as I know) the pack is apparently made up of individual cells ...
1
vote
1answer
84 views

Arduino Power Supply

I want to power my Arduino Uno and I know I can do that either by connecting it with USB to PC or with DC power supply.But I want to connect it with a battery source(kindly see the image below) and I ...
3
votes
2answers
1k views

Will a 20amp ESC run a Turnigy 2213-980?

I'm a noobie just starting out and trying to come up what I need to build my first quadrocopter, I just wanted to run something by people with some experience before I commit to buying anything. ...
1
vote
0answers
85 views

McKibben artificial muscles and the 400:1 ratio

I was recently reading that those artificial muscles had the highest power/weight ratio while electric motors only have a ratio of less than 100:1. As electrical engineer I have never worked with ...
2
votes
1answer
610 views

Salvaging a bunch of laptop battery packs

I'm working on my first robot project. I previously used a 12V 6Ah sealed lead acid battery, but recently I aquired some 15 ASUS Li-Ion battery packs, each of them 14.8V and either 2200 mAh or 4400 ...
1
vote
3answers
1k views

Servos power supply in Quadruped Robot

I'm facing a problem while building my quadruped robot which is figuring out the efficient power supply needed for the 12 servos. I'm using 12 MG995 tower pro servos powered by 2 lithium batteries 2x3....
2
votes
3answers
550 views

Crimp or Solder to LiPo Battery?

So, I'm planning out my second hobby robot(I'm 15). I am planning on using a 7.4V LiPo battery and my idea is to solder on a 3-pin header to connect to the electronics. Anyways, should I solder to ...
2
votes
1answer
184 views

Robot start-up movement problems

I have created robot using a robot chassis kit from hobbyking. At first when testing the robot connected to USB power source and the wheels lifted above the ground everything seemed to be OK. Then, ...
1
vote
2answers
88 views

Battery system with and without mains voltage attached

I'm working on a project where mains voltage will sometimes be disconnected, and the system will have to run on battery for as long as possible before doing a (safe) shutdown. The desired behavior is ...
3
votes
1answer
1k views

How much can realistically be drawn from a 25C max 50C battery?

I am using 8 brushless motors for an octocopter. Each motor can be run at maximum 30A. I use 4 batteries in parallel. How high C number is needed? $$\frac{30*8}{4*2} = 30C$$ When running the motors ...
6
votes
1answer
177 views

Do 6 motors require 6 individually-assigned batteries?

For the Dagu Wild Thumper 6 Wheeled platform, or any multiple motor system, do I really need 1 battery for each motor? Or should I just buy 2 for either side of the platform. In addition, for larger ...
4
votes
2answers
376 views

Choosing motor and battery for a robot

I have a project which requires a robot to move around a room with a flat surface (concrete floor). The robot must carry a laptop. I estimated that the total weight would be 6-7kg (including motors, ...
3
votes
2answers
242 views

Building robots with high reliability, durability, and battery life

I'm involved in research on psychologically plausible models of reinforcement learning, and as such I thought it'd be nice to try and see how well some to the models out there perform in the real ...
3
votes
1answer
53 views

Battery pack discharged

I used a Turnigy 2200mAh 3S 25C Lipo battery pack with Turnigy balancer & Charger 2S-3S for about a month. Yesterday I left the battery plugged into four ESCs of my quadrocopter. Today I've found ...
8
votes
4answers
3k views

How to know when a Li-Po battery is discharged?

I'm building a quadcopter and I've seen that a Li-Po battery must not be entirely discharged, otherwise it could damage it. How do you know when you have to stop your quadcopter or robot in order to ...
1
vote
2answers
94 views

Why is this electro motor going slower?

From an old dust buster I've got this electro motor, the included battery pack and the charger: I ripped everything apart (the dust buster was broken) and the motor still works. After playing around ...
2
votes
2answers
4k views

Charging multiple LiFePO4 batteries at the same time?

I'm looking to use 4 of these 3.2V LiFePO4 batteries. I intend to have 2 pairs of 2 in series in parallel. So two 6.4V battery packs in parallel. Because my setup will be run off of this, it will also ...
9
votes
2answers
7k views

How to charge a LiFePO4 battery?

From what I've seen, LiFePO4 batteries seem like one of the top battery choices for robotics applications. However, I've seen people mentioning that you can't use a charger for a different battery to ...
6
votes
1answer
469 views

Vex motors and tank treads drained 9-volt battery more quickly than expected

I've got a couple Vex 269 Motors hooked up to an Arduino Duemilanove. These motors run a some Vex Tank Treads. I powered the whole setup with an off-brand 9-volt battery. Everything seems to run great,...
35
votes
4answers
43k views

Quadcopter liPo battery weight/capacity trade off

I'm trying to find where additional battery capacity becomes worthless in relation to the added weight in terms of a quadcopter. Currently with a 5500 mAh battery, 11.1V, I can get between 12 minutes ...
9
votes
4answers
12k views

How can one determine whether a LiPo battery is going bad?

In our lab we use LiPo batteries to power our quadrotors. Lately we have been experiencing stability issues when using certain batteries. The batteries seem to charge and balance normally and our ...
19
votes
3answers
721 views

What's the most effective type of rechargeable battery when taking into account size / weight / Ah?

I'm looking to build an underwater glider robot that will need to remain autonomous for long periods of time, perhaps even months. Power draw should be minimal, and I'm thinking of including some form ...

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