🔋 Battery amp-hour, watt-hour and C rating tutorial
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- เผยแพร่เมื่อ 16 พ.ค. 2024
- A guide to battery capacity measurement including amp-hours, watt-hours, C ratings and more.
Website: www.afrotechmods.com/
The Amp Hour podcast: www.theamphour.com/ - วิทยาศาสตร์และเทคโนโลยี
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Now I am getting my interest in this subject after becoming a doctor, hope to learn a lot in future..ty
hi, one question:
if i have 4 x 12V 280Ah C100 batteries and want to do a 24V system, is it better to hook them up into:
2 in series + 2 in series and those in paralel or
2 parallel + 2 parallel and those in series ? (To get a better C Rating? Discharging rate?)
as allways there are folks that say the first is better and other say the latter is better ...
@@Broxine It will not mater 2 in series and 2 in parallel or vice verse just wire it to 24v build it as to the easiest way to configure the connections obviously the shorter the wire is the less losses you will have.
Have a good one.
Ok
"C" specifically refers to the discharge capacity, that is the shortest time the battery can be safely completely discharged in quantified in fractions of one hour. Time is measured on a sexagecimal system, in units of 60, so it can be evenly divided 1, 2, 3, 4, 5, or 6 ways evenly. So a 20C battery can be discharged in 3 minutes, where a 30C battery can be discharged in 2 minutes, 60C in a minute flat. That way you can multiply to get the total amperage, a 5Ah, 20C cell can discharge in 3 minutes @ 100A, where a 5Ah 30C can discharge @ 150A in 2 minutes.
Thanks for the specific clarification. This should be pinned to the top of the comments.
Hence, you could say that the unit for C ratings is [1/h]
I believe c rating also has an impact on charging time that is perhaps more significant to most users to understand.
sexidecimal... my favorite math system. XD
@@error53ish I am so happy it wasn't just mewho thought of that
This is what I love about youtube.. It teaches me more then all of my years in school.. :D
FOR FREE TOO
AND PPL COMPALIN ABOUR THEUR SHITTY MANAGEMENT
@Thomas Chrombly well said
@@tobieeck9676 Or perhaps, somebody has explained something in a way he can understand rather than in a way he can't.
When I was at school (long time ago), certain teachers (yes Mr Baxter the maths teacher I'm thinking about you) only had one way and one speed when it came to explaining things.
In TH-cam you can find any number of explanations on virtually anything.
@@mick2d2 Same here- FOUR algebra teachers FAILED me and one gave me a well deserved "A"!
Great tutorial!
What you doing here? Xd I loved your videos! Have a nice day
Oh did you learn it from here? I am actually building a speaker with your videos rn.
When's your next cool project? :D Looking forward
wow!
R u here ?u r my favorite ♥️ youtuber
Great vid, as always. Thanks for the mention!
Yay thank you!
Afrotechmods do you know any other sources for one to llearn electronics?
Moses A
Check out the recommended channels on my channel page
EEVblog
Mo Overall Fitness Hacks
The way you explain this tedious topic is simply crystal clear and straight forward . Thank you I finally learned it right!
I've been waiting for a long time to hear these terms and processes explained to me. Thanks!
Wow! This video is very well done and clarified a lot. Thank you!!
Thank you very much!! A tutorial well explained like no other. Now I know what others couldn’t explain .
took TH-cam forever but it finally recommended me something useful, this is probably the best explaination of Ah, A, Wh and C I've ever come across. Definitely looking at batteries in a much more reasonable way now.
Great video! I always wondered if a machine would only take a number of amps it needed, or if you had too many amps if it would fail. now I know thanks to you!
This could be the best explanation/tutorial I've seen in ages. Another thing, that AA with 2Ah capacity could've been very expensive back in 2014. I barely see rechargeable AAs these days as 18650 is by far, has become the standard size for battery-powered tools.
The best video about batteries and their units i've seen so far. Congratulations!
A Masterpiece as always....!
Ah has been a mystery for me for years untill now..
You've cleared my confusions...thanks.
I was looking at power packs and powerstation, and seeing they had nearly identical or only marginally different mah ratings (which is what I thought was their capacity) even though they were immensely different sizes and hundreds of dollars different in price, I was very confused and this video has been extremely helpful
its been more than a week trying to understand these three topics. well you just explained everything in 0.1 h
Thank you so much for explaining it so nicely. You’ve answered quite a few things I’ve had on my mind.
I was literally just researching this. Thank you so much!
Took electronics in high school now years later been playing with solar and a multimeter. Great content for a refresher!
well taught. appreciate the illustrations. will make me into a smarter and more capable shopper for sure.
awesome video. Good job!
I enjoyed every detail explained at an engineer level.
what a nice explanation. .
this is what i was looking for..
When a 6 minute video from 5 years ago explains batteries better than my school did this entire year
Very well produced video and accurate information. Bravo!
Totally not an electrical engineer or electrician but stumbled across this and it was very clear! thanks man
this is great. nobody talks about how ampere and amp hours are different, and i was confused for long time until got it by myself.
thank you , I've got a circuits midterm in 6 hours and this helped!
Excellent tutorial. Same as battery advertised in Wh / V = Ah
I used to watch you videos back then, man I learn a lot here
Brilliant video as usual, my brain loved it. So did I.
Brilliant video as usual, my brain loved it. So did I.
Brilliant video as usual, my brain loved it. So did I.
TheRogerx3 Brilliant usual as video, my love brained it
So I did.
Brilliant video as usual, my brain loved it. So did I.
Brilliant video as usual, my brain loved it. So did I.
I don't usually comment on these types of videos but this was sooo helpful thank you. We were given an assignment with this in it but it wasn't covered in any lectures.
Well done tutorial on battery basics. Many are clueless.
Great video!! Amp hours had me buggin'..lol. The last type battery you showed, we use those type in drone racing/freestyle and they're used in many RC hobbies. With high performance drones, the c rating is very important to us, the higher the better performance, unfortunately the cost goes up too. With an average race/freestyle drone you can hit speeds up to 70mph+ but there is also a lot of sharp turns, flips and all around changes of directions in seconds, which means the throttle stick is constantly moving.
Each of the 4 motors can pull appx 15-20amps, and the speed controller chips that operate them are rated at about 40amps for buffer from bursts. So imagine the energy draw on the battery, from 0 to max and back down again, 30 times or so during a flight. What happens to us when battery starts to get low, at the end of a flight, we notice what we call voltage sag, looking at it on a flight data chart, you'll see throttle input increase, and as the quad starts to gain momentum, the battery can't handle it, and the voltage sags, just for a second or so, but in racing that's an eternity..lol. So the higher c rating of a battery, you get lower resistance and way less voltage sag near the tail end of your flight, sometimes when you need it most trying to race to the finish line.
Thanks, your videos are so informative! Keep it up!
Short, clear and informative. That was very good.
Thanks for this great video, it has helped me to disperse some of my questions.
Thank you!
you answered a lot of my questions
Thanks for the valuable information you provided.
Can you explain what does the "initial current less than 60A" written on the side of a Gel 200Ah battery mean?
Magnificent and easy to understand.
Thank you.
Great video! Thanks for clarifying that the units do not actually work out when dealing with C ratings.
I'm so glad to see your videos popping back up on my feed again. You're always clear, concise, and fun with your explanations. Keep up the stellar work!
Excellent video. Difficult topic explained in clear and in understandable terms.
Best explanation I ever had, really good please keep up good work for us "slow learners"
Thanks for making this very clear for dummies like me to learn!
I didn't even listen to it. I read your captions and everything made sense. Nice!
Great explanation to calculate battery life and understand C ratings!
Thanks for the video!
So great 😍👏
I was looking for this information.
I like to think of the C rating as implicitly in units of per-hour (1/hour or hour^-1), so that a 2C rating means you could (in theory) discharge such a battery twice in one hour (or once in half an hour). This way, you have a calculation such as 2.2 Ah x 20/hour, and the hours obviously cancel out, leaving a measure of current.
A similar nuisance occurs with electrical power utilities and their kWh measurements - you end up sometimes thinking about kWh/hour, which always strikes me as bizarre, even though it just means kW. Great videos, BTW. :)
I'm so glad you're making videos again.
I have a question.
Why do rechargeable batteries have mAh ratings on them but non-rechargeable ones do not? Aren't regular chemical batteries also able to deliver a set amount of current in amp hours?
I'm not sure why they do this but it annoys me too. You can usually find the capacity of alkalines etc. by looking up their datasheet.
Thanks for the excellent tutorial it really saves time
GREAT!.. NOW I UNDERSTAND CLEARLY ABOUT BATTERY CAPACITY IN HRS, WHRS AND C RATINGS
THANKS BRO
Your videos are awesome. Could you please make a video explaining what it means for a electrical component to draw too much current?
Thats very informative.Thankyou for posting in a very "understandable" way.
If I'm using a Li-ion battery with a limit of 4 A, feeding a circuit with a duty cycle of 80% consuming an average of 3.5 A, is the battery going to behave as if it's consuming 4.4 A and therefore opening the circuit? Would a buck converter fix this? If I manage to increase the frequency of the PWM, can I trick the current monitor by having an on-time smaller than its over-current detection delay time?
Thanks for all your videos, you're amazing!
u really rocked it bro.....it is very easy to understand by way u teach...
Amazing explanation! Thanks for sharing! :) Now everything is clear.
I Learned so much from you, thanks for that! Things i Never thought i could grasp, now become clear to my aging Brain. Greetings from Germany !
Who r this assholes who put dislikes
great demonstration. i think im startin to get it now..
Hello, thanks for this awesome learning material. This is really helpful for query regarding Amph
That certainly cleared up a few things, I've been curious as to what the amp hours thingy on batteries actually meant. Had to watch some of this a few times before I got it.
What parts were unclear? (just looking for feedback)
Afrotechmods
That's just me, on pretty much any video that's about something I'm not familiar with, sometimes I have to replay something several times before I understand it.
Afrotechmods
I thought your video was very clear, but then I am studying electrical engineering.
Afrotechmods
it's clear. Us dummies just can't absorb and retain new concepts on the first pass a lot of the time :)
Afrotechmods you were very clear on this video. However, I too had to watch more than once since this is all new to me. At least you get more views from us newbies!! Lol.
thanks about the explanation, Finally I know about C rate and relation to Amper Hours. The video have helped me understand my problem
Thanks for the video. Immediately clarify the areas I could not understand.
Very, very good post thank you. The internal impedance has really changed my thoughts on a battery bank. A subtle but important note, thank you!
Simple and clear explanation. Thanks!
Can you do a video about how you acquired your knowledge (education, career, etc)? I'm taking electrician classes right now so I'm curious. Also, your videos are awesome.
This is great. Thank you.
Amazing video, exactly what I was looking for.
I'm currently testing my surprisingly large collection of AA and AAA batteries with a RS232 logging multimeter and 3.2 ohm load. This makes about 200 ma current draw. I'm logging the data to a computer and working out the total amp-hour capacity of the batteries to estimate their overall maximum charge. Seems to be working pretty good. I'm measuring mA not volts. (If i had arduino or two DMM i'd do both at the same time). Thanks for the vid.
No.. Thank you for Making & uploading this video and many others 👍👍
Thank you very helpful, by the way are you the voice of 'Talky the toaster' from Red Dwarf TV show?
Thank you so much... I need this tutorial like yesterday 😅
great explanation now I understand how this works and what's the difference in between
Just learned more in 6 minutes than in 3 years of high school Electronics class. Subbed.
Great video! I'm trying to power a 5V sensor with a 3.7v booster/charger pcb. What's the minimum mAh battery you think I should use? I have a 120maH lipo on it now and the board seems to dwindle and looses power 😞. Thanks for your time!
Great video! I need help on NiMh batteries. I am into the hobby of Tamiya Mini 4wd and batteries make a great deal on our races. I normally use 2x Fujitsu AA NiMh batteries (min. 1.2v 1900mAh) on our cars. What we need to achieve is a high consistent current delivery and as well as the batteries needs to last longer. Batteries shouldn't self discharge so quickly as well. We normally charge the battery on smart chargers (we don't normally charge the batteries individually, it's a series of 4-6 cells per 100watts channel charger) for .2A - .3A. We also cycle them with a discharge rating of .5A and a voltage cut-off of .9V (multiplied how many cells we are charging per tray) and same charge rating. My question is how do we 'break-in' a new battery and how do we charge and cycle them?
Great video and it was really helpful. Thanks
this is a great video. thank you. I have a question. I have a cordless vacuum, its rechargeable battery pack needs to be replaced, however, it has been discontinued. It is 4.8v 1.3Ah. I wonder I can simply get 4 AA rechargeable batteries bundled up to replace this old one? thank you very much
Good voice, clearly speech and very good videos.
Amazing explanation thank you
I will have to watch it a couple more times. My head is spinning. Good instruction. If I were smarter I could say you made it easier to understand
A great tutorial for a beginner. I like the way of explain and I'm gonna like and also subscribe to your channel.
I've always been so confused by batteries, especially in terms of voltage and current. Thank you for explaining this!
thank you for this fantastic video!
This taught me more that my school ever can. Im defnitely wathing your vids and subbing. Dont know if you already make videos on normal electronics and electric topics in physics for school, if not you should cause you'd make a great teacher :P
Great tutorial as always.
nicely done the explanation.
I Think that was a beautiful and useful video, thanks a lot for your effort :D
Perfect! Clear and to the point.
4:35 - yes that's right! coz in the context of physics, power = work done / time. so obviously work must be in the unit Joule thus Power has to do with energy.
Great explanation! A lot of people today are so confused with (Ah) and (A). These are the things the people need to know when buying power banks, vape batteries etc.
We need more videos on batteries like this!
thanks Great Video.
keep them coming
Tutorial request. Could you please explain the principle behind capacitor choice in circuits (when to choose ceramic vs. electrolytic, polar vs. non-polar etc.) I always get lost with the huge variety of ceramic and plastic caps. I often pick random non-polar ones based on capacitance and find that they work equally well in PWM circuits for example. The only thing I've noticed is that cheap brown ceramics react to temperature much more than blue and yellow ones. Tantalum caps are most stable. But I'm pretty sure there's more to caps than that. Of all the components I find them the most mysterious and non-intuitive. Thanks.
i have been looking at tons of batteries on the web....6v,12, assorted amps, etc. I have even looked at step-up dc/dc coverters....12>24 and 24>48.......i am looking to power a 48v 1000watt brushless,gearless ebike motor hub.....those lithium battery packs cost more than my trike and ebike conversion kit COMBINED.....so i have been exploring the SLA battery configs...... thankyou for this video....i dont have an apple to put on your desk but is it OK if i go to the playground a little early ?
If you have a lipo battery and a sharp object, you can release all that stored energy much much quicker than the C rating says. Unfortunately it causes the battery to exceed its design specifications and malfunction ;-)
accidentally did that with a tiny one the other day when fiddling about with the charging chip on it, kinda scary!
How does it work
step one: stab
step two: throw outside
step three: boom
I love your vids man keep the good stuff coming but pls make a video about winding transformers I really want to know because I want to make a dual rail + and - 25 volts for my audio amp
Great video. I'd like to have seen a little more mention of the hazard of over discharging some batteries. Venting a Li-Po is bad lol.
Very clarifying video, thank you very much!
Thank you so much! Just a quick question. Then why do they still use AH instead of WH? I think AH always confuses us.