Battery Definition and 1000 Threads

i would like to design a solar assisted driving mechanism for my bicycle? What is the compatible battery specifications to power 24v 1hp dc motor and the necessary solar panel specification to charge the battery? I'm kinda clueless in this so any help would be deeply appreciated. Thanks

Hello all. I am in the process of designing a circuit that involves a resistor divider that connects to a buffer to be connected to a DAQ system. This circuit is being made because the input voltage coming in will be in the range of tens of volts, and what I want is a smaller Vpp wave...

Homework Statement A 10.0 uF capacitor is charged by a 10-V battery through a resistance R. The capacitor reaches a potential difference of 4.00-V in a time interval of 3.00 s after charging begins. Find R. Homework Equations C = Q/ΔV q = εC(1-e(-t/RC) The Attempt at a Solution...

Please help! Also, please correct any misunderstandings which I have. I have read about electricity basics and what happens on the atomic level until I have read ideas which compete with each other. 1 - I've read that the word electricity applies to particles with a negative charge (more...

Hi. I'm investigating the idea of using a laptop battery for energy storage in a portable solar setup. The idea is charging the battery from solar panels, then power/charge other devices from the battery in low light conditions. I would like to be able to power/charge laptops and...

I am working on a senior design project that is to design a battery management system to monitor NiMH batteries powering an electric truck. The professors who proposed the project set the main requirements to be that it measures the voltage of every cell, the temperature of every 5-10 cells and...

Hello everyone. I'm glad to be part of the Physics Community, I've read a lot of interesting threads, and I think now I'm ready to be party of it! For my project, I'm trying to create a ElectroMagnet using a Car Battery. The specifications for this battery are.. 12V 390A 65 RC -...

I have been trying to maximize the life time of my laptop battery. My approach to that is to almost use up the charge in the battery then immediately charge it. It is always annoying when the battery have 5% left, because that's when it hibernates automatically. Can I change the settings so it...

Hello, I'm trying to learn about LiPo battery pack safety and was wondering if anyone could head me in the direction of some good sources of information. In particular I'm trying to learn enough to safely re-build and extend a laptop's 6-cell (3S2P) pack, but hopefully to extend it to a...

Battery has positive and negative charges, will it be possible to generate electrostatic energy to my body by touching either sides of battery? Thanks in advance for any suggestions

Here's the problem: Consider the circuit in which a battery with internal resistance r can be connected via a switch to a resistor and capacitor in parallel. Suppose that the capacitor is initially uncharged and then at time t = 0 the switch is closed. After the switch is closed a...

a capacitor does not work on dc as time varying current is required for it to function then why does it work on dc battery?

hey guys can anyone pls say how much current in amps does a ordinary car battery of 12v generates?? pls...

Homework Statement Determine the current through the 10-V battery. [PLAIN]http://img69.imageshack.us/img69/8016/crct.jpg The Attempt at a Solution This is very confusing. I know the equivalent resistance of the circuit is 15 since all resistors are in series. So, the current drawn...

Homework Statement Using an AC signal generator vs, a transformer with turns ratio n = 1, and a battery VB, sketch a circuit that will generate the output signal vout = vs + VB Homework Equations \frac{V_2}{V_1} = \frac{N_2}{N_1} The Attempt at a Solution Here's my sketch...

Does anyone know how to use an electric motor to charge a DC battery? I read on ehow.com that all you need to do is find a way to spin the shaft and it produces electricity that will charge the battery? Is that true, is it that simple?

When I was a kid listening to a transistor radio under my pillow late at night I used to wonder whether turning the volume down low would delay the gradual loss of battery voltage. My doubts centered in the fact that the volume control was (at least in those days) a variable resistor. I reasoned...

Homework Statement Design a circuit to recharge a 1.2-V Ni-Cd battery from a car battery with a current of approximately 10 mA. Homework Equations The Attempt at a Solution I was looking in the back of the book on this one and it had a simple circuit devised with a 12-V battery...

Homework Statement In circuits, when we represent a battery we note by a long vertical line(positive) followed by a short vertical line(negative). But in some circuits, we follow a long line followed by a short line, again a long line and a short line with dots between them. What does this...

Homework Statement An ideal battery with an emf of = 14.0 V is connected to a network of resistances with R1 = 6.00 , R2 = 12.0 , R3 = 4.00 , R4 = 3.00 and R5 = 5.00 . What is the potential difference across R5? __R1__ __________R3__ __R2__ __R4_____R5__ __emf battery__...

I'm having trouble understanding how Ohm's Law applies to a battery that is being short-circuited. If the terminals are both connected by a low-resistance wire, then they should be at the same potential, since there's no resistor to cause a drop in potential. But the terminals of the battery...

Sorry if this is in the wrong section (it isn't homework). I am trying to form a basic understanding of electricity. Right now I'm attempting to figure out how to calculate how long a battery will last with certain devices. I might be completely off base but here's what I've got. 12volt...

Okay, so before when I asked a question about voltage multiplication, I was recommended a charge pump. But now I realize that creating a charge pump to get the voltage I want would be rather ridiculous. So, here is my problem: I need to get 1000vdc from a 9vdc battery, but I'm not entirely...

Hello, I want to use a DC permanent motor as a generator in order to use it to charge a battery. This generator will be rotated by hand. The speed is varying as it rotates by hand. I would like to know what is the circuit that I could use it to charge 12 V chargeable batter? Best wishes,

I am using this battery for a boat bilge pump. It's all working as expected, but what I am trying to determine is if my battery is suitable for the charger I have and if so, I need assistance decoding the CHARGING TIME chart (picture below) in my charger manual to determine how long I should...

I was wondering if it was possible to use, simultaneously, a 30 amp (or higher) charger on a car battery and a DC to AC (say, 700 watts) power inverter. Where I live we have 8 to 10 hours of power outages in 2 hour intervals during the day. Instead of wasting money on expensive office UPSes...

if the machine requires 260A and if i take a battery of 1300Ah, it would mean that the battery is discharging at 1300 Amps per hour so if the machine takes 260 Amps then what happens to the rest of the current. the motor takes 260Amps so does it mean that it will take total 260 Amps as long...

Homework Statement Electric motor in put power rating is 17.5kw Voltage is 48V Battery is 7.5kw/h Average W needed to maintain motor per sec is 1446.7W Homework Equations Motor: W=I*V > I = 364.58Amps The Attempt at a Solution My attempt: If 1kw = 3.6 x10^6J > 7.5 * 3.6 x 10^6 =...

A colleague of mine (who I trust is telling me the truth) just told me that he has seen a completely dead battery (a car battery) recharged so that the polarity was reversed from its original configuration. I'm not well versed on the inner workings of a battery, but I thought the chemistry...

Homework Statement Use Kirchhoff's junction rule to calculate the current supplied by the battery. Homework Equations attached a pic. The Attempt at a Solution Where do we start?

Hey guys! I have two camcorders. Cam #1: Power Supply: DC 7.2V (battery) Power Consumption: 7.4W Cam #2: Power Supply: DC 7.4V (battery) Power Consumption: Doesn't say :( - but should be the same roughly. How long can a "portable powerpack" with the following specs keep these camcorders...

12 v 7 ah battery charger urgent hello everyone i am getting stuck with 12 v 1 amp adapter and with 12 7ah smf leada acid battery . i give supply from adapter to battery through 1n4007 and then from this batttery to my microcontroller kit. by this my batteyr get charged and kit gets supply...

Homework Statement Two 9.4 k-ohm resistors are placed in series and connected to a battery. A voltmeter of sensitivity 1000 ohm/V is on the 3-V scale and reads 2 V when placed across either resistor. What is the emf of the battery? (Ignore it's internal resistance) Homework Equations...

I have built a battery charger for a cordless drill. It works fine, however, I would like to add an LED indicator to let me know when the battery is fully charged. I'm getting tired of checking the voltage across the battery all the time to see if the thing is charged. I'm not picky on how...

Hello, If one had a resistance free wire and a battery with no internal resistance, how would Kirchoff's law be applied if the terminals of the battery were connected by the wire? Is this even an appropriate question? I know/believe current would be at infinity. I am still trying to fully...

I want to charge a led-acid battery it needs 12V DC 1.i have transformer to convert 220V AC to 12V AC after that can i give 12V AC to bridge rectifier and from bridge rectifier to battery terminals directly or should i use a filter to remove the fluctuations in DC ? 2. what should be the...

I have a simple question I hope): My cordless phone handset works with two 1.2V rechargeable batteries, but the DC converter that comes with it and that is supposed to recharge the batteries has a 9V DC output ! How come ? Is it applying 9 V to recharge two 1.2V rechargeable batteries ?! Or...

Hi Everyone I have a query, We have some low voltage (24v) led light strings that run off a 24v transformer (down from 230/240v - UK). We wanted to run them off battery packs so we bought 2 x 12v (in series) batteries to make 24v. When we wired up the batteries the lights were duller...

Nickel-Iron batteries are making a comeback in the renewable-energy industry. My personal interest happens to be for wind generator/solar power energy storage and also for a pendulum gear-driven clock design that I am working on where I need a minute amount of stored power to operate a small...

Hi all, If I have a battery bank 12V@1000A- what size solar cell (kW) will recharge this battery bank (from flat to full) over a 8 hour period?

If I connect the +ve terminal of one battery to a terminal of a bulb and the other terminal of the bulb to the -ve terminal of an other battery, why doesn't it glow? There is still potential difference across the bulb's terminals and so the charge should flow.

I have two probes. They consist of a stainless steel cylinder inside another, one held by epoxy and one held by acrylic. I can measure a voltage difference between them. I have placed them in tap water and applied a 5V difference across them then disconnected the voltage. The problem is that...

I want to make an heirloom mechanical pendulum clock that is very tradition in design and yet will accurately work for centuries—and so I want to micro adjust the pendulum amplitude automatically and that requires some electricity, not very much electricity, but it will take some small amount of...

I have a Ford Escape Hybrid. it is a 330v battery with about 1.4kw of capacity. Currently there is no cost effective after market charger. Also my location in NYC does not allow me a "plug in" option. I had an idea on how to access the battery pack to charge it, but I wanted to know if...

"D" cell battery gets hot As a hobbyist, I was playing around with an MP3 player that uses a single alkaline AAA battery. I wanted to see if the player would still work if I attached a "D" cell battery to the device. I went to Radio Shack and puchased a "D" cell battery holder which has two...

I have a cordless electric lawnmower that runs on sealed lead acid batteries. It is on it's second battery, which has noticeable degraded performance and will need replacing soon. My question is why the original battery, which was rated at 17 Amp-hours, lasted twice as long as this second...

So I am in the process of rebuilding my laptop battery for higher capacity cells. I would appreciate it if someone can help me understand the arrangement of the cells. From my research, each cell is 3.7V 1800 mAH Li-Ion cells. There are 6 of them in the battery pack. In this arrangement...

Hello all! :smile: I have recently bought a new laptop. A problem that I had with my older laptops were that the battery broke quite fast, and I don't want this to happen anymore. I have a 9-cell Li-ion battery, what do I have to do to let this battery live as long as possible? Is it...

Hi friends, I don't have any electrical background. In my experiments I have 11 V Battery which has to power up PC104 which needs 5.3 V. Can please help me out how to step down the voltage. Thank You, Yawanth

We are working on some design ideas to hopefully eventually get our shop and home off the grid with independent power. We are in one of the best locations for wind generation but energy storage becomes an issue and a grid tie system is simply impractical and will not obtain our goals. the...