Connecting batteries in series or parallel (LIPO)
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- เผยแพร่เมื่อ 17 ก.ค. 2014
- UPDATED BETTER VERSION HERE - • Easy Connecting of LIP...
Note. I mispoke in one place in the video. 2000mA equals 2 amps.
You can also check out lots of other R/C basics explained simple in these series: • Electronic Basics for ... and • Common Radio Control Q...
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If you are still confused after watching this old video then the later version is easier to follow and answers many of the common questions from this video - th-cam.com/video/_iKzPArooLM/w-d-xo.html
So do you just leave the charging cord alone and it doesn’t need to plug into anything when running your rc like will it still work in water?
Instablaster.
Mine holds 2 LiPO batteries okay and it dies after being played with but one of the batteries is less powered than the other one when I'm showing 8.4 volts the other one still showing 11 volts what's going on
Very good explanation. It might just be also worth mentioning in this video that if you connect the two batteries in parallel the storage capacity in mAh doubles to 4000 mAh, and when connected in series, it stays the same at 2000 mAh.
Ooooooo thank you man!
Awesome 9 years later and your video/content/information is still relevant!
Thank you! With watching this video and your 101, I now understand LiPo batteries. I have been a Nitro/Gas guy for a while and have fallen behind on the technology of electrics.
That actually cleared a lot up I'm a vapor and all the vapor vids confused me but this made it all clear thank you
Thanks for taking the time to impart your knowledge to everyone ,nice little tutorial 👍
9 years after, still being so helpful 🙏
Thank you! This made it so much easier to get my head around, great work
thank you so much I've been looking for a video to explain serie parallel for days I really appreciate your video
2nd question. Is there any negative effect on serializing a 4s with a 5s of same caliber ??
As usual your videos give me the exact information I needed plus a couple new nuggets! Thank you so much!
Great explanation! Everything was clear right to the point!!
Thanks for explaining the difference to me. I always mix the 2 up for some reason. Had the correct cable to make a 12s out of 2 6s lipo batteries but thought i connect them in parallel instead of series. And hats of for you you are a very patience man with all the questions you get. It's like people can't think for themselves and are looking for a quick and easy answer instead of looking it up themselves on forums or use there brains. I know i went looking for a answer myself but this was a pretty simple one. I see a lot of people in the comments here asking the same question over and over again. I don't have a problem with explaining something to new people in the hobby but i give up on them if they keep coming with the same every time.Do your research self it gives you a much better feeling if you solve the problem yourself with research on forums by digging trough the site.
Thanks for posting that. I agree too many want the 'quick fix' rather than think the problem through and use the resources available and gain a better understanding of what they are looking at. I try and teach the person to fish, not give them one so they can help themselves next time they are stuck ;) Happy flying!
Perfect thank you, I am looking at two extra 2s lipos 1200 mah 30c and we all love as many extras as we can get it will be a 4s for my quad, this is perfect thank you.
If you kept clips on your cables, could you switch configurations back & forth (parallel to series to parallel) depending on your needs? Assuming one's solar power & inverter --if used-- would be adequate either way, would switching like this cause any damage to anything? Just curious...Thank you.
Amazing explanation! Thanks so much! My project can start today because of you :).
Awesome video! Just made a serial connector with the help of this. Thanks!
now that is a CLEAR heck of explanation!!! AS CHRYSTAL CLEAR. THANKS MAN ITS VERY KIND OF U!!
Great video could you recommend some batteries to run in series to make up a 52volt 14/16 amp battery for my ebike build any info much appreciated.
Thanks,most informative.
After joining the batteries (Parallel) can you charge them as a single entity?
have a question I have a e-bike and I have two 36-volt batteries hooked and serious these batteries I have are no more than maybe two months old and I bought a brand new one thinking that what solved the problem and it didn't but I will hook these batteries up in series and put a load on the bike like going up the hill at half throttle I will be halfway up the hill and the votes in the battery were dropped down rate in front of my face so far the bike were cut off and then I would have to unplug the plug replug it and it will be okay until I put another load on the battery and then that would happen again could you please let me know what the problem could be
Thanks for the video mate. I have a 5th scale vehicle coming from china it's the fid Dragon hammer voltz it's brushless, and I need to know what will be some good connectors to solder to the wires . The motor will be running g off of two 4s 16,000mah 25c lipo battery packs. The esc is the ztw 300a beast pro.
Thanks for this little video! Just needed a quick refresher as to what connectors I had as I haven't driven/worked with my RC Buggy for a while. Just one thing I would mention, with the theory you've given, is parallel basically gives an RC model a longer flight/run time, but the same power. With series as I run in my buggy with 2 2s lipos, it gives it a slightly longer run time but also doubles the power that the buggy can draw. So since my setup can handle a 4s lipo, basically doubles the max speed my buggy can get to :)
+TBD_TheBlackDog as you increase the voltage by connecting your batteries in series it does mean that the motor needs to pull slightly less current to get the same wattage. This will have the effect of giving you a slightly longer run time as well. Same effect as replacing the 3s with the 4S pack in a model
Thanks for making that.. makes it clearer to understand..
can i join , 4 battery in series and 4 battery in parallel, together, for charging them at the same time with the same charger ? example- 12v 24ah ×4 in series+ 12v 24ah ×4 in parallel?
what would be the ultimate voltage and range capacity would i get ?? can you please tell ?
I m thankful to you
I want to calculate battery bank for my solar plant
Your video give me whole solution of my problem
Now I can design my battery bank as my need
Thanks again
ok i have a esc that has a y splitter for series 2x2s to make 4s but i bought some 4s batteries that was on sale how can i make a splitter to run just the 4s when i want to
Hello. I have a question. I have several 6s 5200mah 50c packs and will be needing 8s soon. The ESC connector has a loop connector connected to the 2 ESC leads which would normally have two 4s packs connected to each. Would it be possible to just buy some 2s packs that are the same brand, mah, and C rating and combine that with the 6 to get 8? Ive asked this in another forum and got mixed answers. Some said NO WAY!! And others said its no different than combining two 4s packs to get 8s. Thank you
Thanks so much for all your help - very much appreciated !
Thank you this was very informative I have a bike I’ve been building the last couple months and I have to hover board batteries both 37 V and 20 A and I’ve been trying to figure out if I can connect both positives and negative’s together and then charge both of them together as well as discharge as they don’t have a second set of connectors but really just a positive and a negative
If you do that, you will fry your batteries
Thank you for the video, very helpful.
I'm planning to buy a 6S 16000 mAh battery to power a ~8A motor for a robot I am building... I tought it could power it for 2 hours but it has 10C written too...so does it mean the battery is capable of 160A? Can I power my motor for 20 hours with that battery? Sorry if it sounds dumb but I'm new in LiPo(s) Thank you again
The videos in the 'Introduction to Remote Control' covers many of the basics. a 16000mAh pack will provide 16 Amps for an hour, 32 Amps for 30 mins, 64 Amps for 15 mins etc. The 10C on the pack means that it can deliver 16,000mAh x 10C = 160amps max. Not sure how big the wires on it are! :D
@@bldjln3158 2 hours
I want to do some test runs on a hydroplane using 8s before I commit to buying anything else, like 10s or 12s, if i don't like the performance of the 8s. But, I will achieve the 8s by connecting 2) 2s to make a 4s, and then 2 more 2s to make another 4s, and then connect the 2) 4s to make the 8s. Is there any reason this may not work? all are same 5200mah though 2 are 25c and 2 are 30c. And again will be ran just for testing, not racing.
Hi i found this really informational but now come to the point when i want to charge both batteries i have the same set up 2 3s batteries together to make a 6s but is it possible to charge it with a bms? How shiuld that work could you please help out thank you
Is there any way to follow this process doing a series/parallel connection?
This is very helpful!! Thanks for making this video!!
Hello i have 2 batteries for my drone one is 3.7v 600 mah and the other is also 3.7v but 200 mah so can i connect them in parallel to have the same voltage(3.7v) but 800 mah ??
Thanks in advance
i have different brands and sizes.. say i combo a 2s 3500mah 20c and different 3s 4000 mah 25c.. to get a 5s total would this be safe to run
Thanks. I needed a refresher.
Thanks a lot man, made this really clear! 👌
Thank you, this solved a problem for me. I'm installing an e flite 360 onto a hanger 9 xcub 60cc. I'm using a a castle 160 amp esc and a bec. I want to run 12s and didn't know how to rig up the batteries. You explained how to solve my issue, great video
I want to hook up 4 3s 8000mah lipos in series and in parallel ...to get 1 6s 22.2v battery is this possible?
thank you very much, simple and straightforward!
can you list all the connectors and wiring you used to create the series connector for the two batteries?
so what if I set two 6s packs in series then get three of these sets in parallel would that work for an ebike?
Hi there, can I connect say 2x 4s packs with different MAH in parallel or do they have to be the same MAH and c rating? Cheers
Id say they have to be the same capacity, even though JB says that charging different batteries of different capacities is quite ok. Check his video and suit yourself.
Hye...i have one question...if i use in series can charge my lipo in parallel?
Thank you for sharing this valuable video
Extremely well explained and diagrams just as nice and very helpful 👍🏼
Another clear video - nice work! Thanks
Best explanation out there, and the visuals as well every one else is cramming numbers at ya and it makes no sense to me any way….!!! 🤘😎🤘
Thanks for this video, very useful and simple. I'm interested in making a 12s6p battery, could I make the 12s6p battery then connect a couple of lipo batteries in parallel to increase the capacity?
You can always connections mode packs.. see the updated later version here this video... happy flying!
When connecting in parallel would it be adetageous to install a large diode so both packs supply the voltage and stop the less charged pack being topped up by the more charged pack. Or does this allow for voltage stabilisation?
It's an interesting idea. The problem comes from the fact that the diode will actually drop the forward voltage a little so that'll introduce more problems than it solves. Plus you need a diode that can handle the max amperage of the packs. Happy flying!
This was a great video. Is there a source of info to find out about individual battery pack configurations? For example, I have a laptop battery HSTNN-YB02, 8 cell, 14.8 volts.....I've taken it apart and it looks like I have two sets of 4 batteries. Each set of 4 has 2 batteries connected in parallel (3.7 V as measured) and the two are connected to another two in series (for a measured reading of 7.4 V). .........I think I understand this...then the set of 4 is connected to the other set of 4 I think in parallel.........so I think this should then give me my two times 7.4 or 14.8 volts total.....but the other set of 4 gives "0" V when I measure and the total V of the 8 is 7.4 V on the board (assuming I'm measuring correctly).............the numbers/letters on individual batteries is HL9FJT5 and then 037953.......If there was a source of information to ID the individual battery voltage from the numbers/letters on it, I could then confirm or refute what I'm thinking.....and information to better understand if I have the correct idea about parallel and series attachment is all about........The reason for all this is I'm been trying to figure out if I have a laptop battery problem or a laptop charging problem. Sorry for the rambling comment.
When in parallel what will happen to the balance leads? Do they need to be as well in parallel when one is ready to fly his model.
Can I do this with 2 48 volt batteries they have a bms in them does that make a difference?Can someone please answer this?
I have 2 lipo batteries 25c each. if I'm going to connect them in series will they go 50c in total?
can i connect two different brand different power (mah) and different discharge rated batteries in parallel??
Not recommended. Always try and use the same capacity and C rating packs when using in parallel.
Happy flying!
in parralale u can mix different capacity (but not different volts ) 1 ah+ 3 ah + 10 ah = 14 ah and if use 7.5 ah ( 50 % of total capacity ) and u disconnect them each pack will still have 50 % of their capacity that mean the 1 ah battery with be remain with 0.5 ah , the 3 ah will remain with 1.5 ah and the 10 ah will have 5 ah still remain ,, many people believe that the smallest will die first ,,, ,, it's exaclty the opposite in serial it's could , but not in parralale ( serial can't mix different capacity but different volts can ,, if u mix different capacity in serial the value of u pack is the lowest value of the smallest pack in serial 2000 mah + 3000 mah , = 2000 mah , u can't use the 1000 mah remain bcuz the other pack already to 0 mah , it's will die ,, but u can disconnect it and use ur pack alone with his 1000 mah remain but not with the empty pack ) hope u get it
pochul Although thats true, it is not necessarily the best solution, for complicated practical reasons, it is better to use the same cells and manufacture so that differences in the chemistry for them does not cause issues. (which may cause differences in the internal resistance, charging curves, thermal characteristics, etc.) Point is it can be done, although like Painless360 says, not recommended. Only Macgyver is allowed to do that! :)
I have a 48 volt 1000 watt motor and speed controller. With four new battery’s that 12 volt nine amp hours all the same brand and another set that are 12 volt 12 amp hour whenever I hook the battery’s up to the electric motor which is on a razor atv. That I have modified. There is a huge spark everytine. Why is this ? Also have burnt up two speed controller like this. Please help
hello great video, i want to connect several lipo rc packs together for a ebike build but i want know do i remove each bms chip from each pack to install a big bms overall or do i just run the lupis with no bms and use a balance charger? if you help that would be fantastic
No idea, the packs I'm using here are not chipped. Best of luck!
hello Painless360, i have a question, i have a drone syma 5 that works with a lipo battery 1cell 3.7 volts, 500 mAh, and also have a drone JJrc h8 that works with a 2 cell 7.4 500 mAh and those batteries has a balancer conector, can i repalce de 7.4 volt battery for 2 batteries 3.7 volts making a conector in serie? is the same than the stock 7.4 volt? does not affect if theres not have balancer conector? i will apreciate your answer, for me is more conveninete for price and time to chage use the 1 cell 3.7 volts batteries, thanks.
+IMPORTECHML You can but make sure that the mAh rating of the 1cell batteries are the same as the 2 cell you're using. I would recommend investing in the right batteries for the model as the extra wires and connections all add weight and points of failure to the model and some of the smaller models are very sensitive to extra mass. Best of luck.
what should i use,parallel or series for gel blaster
Thank you for the helpful video
I have three 4s 1800mHA 65C batteries, when i connect them in parallel, it's will give 195C will it effect my motor and ESC, I know My ESC and motor can handle 4S.
+Skytech Today No, you'll get a 65C 5,400mah pack.. ;) My advice - buy the right battery for the job..
That was very very helpful video, I enjoyed that.
Thanks bro
is that the same way you hook up a hobbywing Max 6 in dual series for the ESC
You can't hook up ESCs in parallel in the same way. They are designed to be the only thing connected to the motor and use phased pulses to run the motor - those phased signals wouldn't be in sync'd if used two? Happy flying!
Painless360 I hav a on road RC car trying to get high speeds is series better ? I'm not worried about the run time on it
Hi, just watched your video and it’s very helpful, I have a question if you could help? I have a cctv test mointor which the battery doesn’t work properly, on the charger it said 12 v in to charge but when I do that the charger get very hot and doesn’t charge properly, when I took battery out it looked like it was 7.4 battery that was in series, do I need use a 7,4 battery charger as original didn’t come with it , also the cctv mointor has a 12 v out and confused how that works?
Tricky to comment without the specifics of the monitor you have but that sounds like there is an issue with the charger, charging circuitry or battery. You usually need a higher voltage from the charger to push the current through the battery you're trying to charge but if its getting hot somethings wrong.. Best of luck
in the race competition, we have to change the battery as the track is long, and they have to keep the video signal. im planning to use parallel XT60 method. However, is it safe enough to plug in the different voltage battery? e.g. when swapping 14.7V landing, keep plugged for video signal, and plug in 16.8V new battery. then take out the old 14.7 V. (probably few seconds that both battery connected each other)
Is it a fairly safe way and wont damage the battery? as it is a simple XT60 connected into parallel, i dont think there is limit of current.
If you mean plugging in a battery in parallel with a very different voltage, then that's a bad idea.
when you place multiple batteries for an r/c car, does the battery C rating has to match? example if I used a 2S lipo 25C plus a 4s lipo 50C rating to have 6S lipo is that ok?
or would both batteries have to have 50 c rating?
Please see the later version of the video linked in the description. It answers a lot of the common questions in this comment section..
Hi great video thank you. I had two old 2s 2200 25c lipos that I wanted to connect together in parallel. I have a 150A ESC so I think this would be ok?
Each battery could only supply 55A each when they were new. It'll be less now. Even together they couldn't supply the 150+am;ps the ESC needs.. Hope that helps..
Thanks heaps for these videos, very easy to understand. Quick question for you, I've got a FPV/aerial recon plane using a pixhawk clone and I want to extend my flight time. If I connect two 3S 2200mAh batteries in parallel obviously battery voltage output will be the same at 11.1V however for the sake of setting up my battery monitor in Mission Planner, I will specify a capacity of 4400mAh? i.e in parallel voltage does not multiple but capacity (mAh) does? Thanks!
Nick Kilroy Yes.
Thanks!
Can you use a 4000 mah battery and a 5000 mah battery in the same car like a xmaxx or will this destroy something??
It should probably be important to mention that batteries of different voltages (or cells) should NEVER commented in parallel, while batteries of different mAH should never be connected in series.
Connecting batteries that have different voltages in parallel can cause excessive current from the higher voltage pack to uncontrollably dump that charge into another lower voltage pack, as the system tries to equalize itself. if the current is limited, the lower voltage pack can safely charge up and the higher voltage pack can safely discharge into it, and of course the cell numbers are the same (3S to 3S) thats not much of a problem, nor is it in issue when both packs are already at the same voltage and same cell count. The packs can be different capacities since even if one dies faster, than the other pack will help the dying pack out by taking the load off of it, as well as supply the grunt of the power. More technically, it is an equilibrium condition.
When it comes to series circuits, the cell count actually can be different between the batteries, however, the capacities MUST be closely matched or else the one pack will discharge faster than the other, and they will need to be continuously balanced, and if one pack fall below 3V per cell, and the multi rotor is trying to draw lots of current, it can be thought of like a short-circuit, and you can see the small dead battery will be *reverse charged* by the bully battery, and it will probably explode! I like explosions, but not expensive ones! (Also I do not like class D fires. They nasty!)
exaclty true ! in parralale u can mix different capacity 1 ah+ 3 ah + 10 ah = 14 ah and if use 7.5 ah ( 50 % of total capacity ) and u disconnect them each pack will still have 50 % of their capacity that mean the 1 ah battery with be remain with 0.5 ah , the 3 ah will remain with 1.5 ah and the 10 ah will have 5 ah still remain ,, many people believe that the smallest will die first ,,, ,, it's exaclty the opposite in serial it's could , but not in parralale ,, u right to mention it
pochul I actually never thought about it in terms of capacity, but absolutely true, considering the similarities of the charge/discharge curves between the same cells w/ the same chemistries; and also the voltage, since the cells will remain at exactly the same voltage when in parallel. Good point!
+Power Max
I would like to move into the parallel configuration for my quad. I am not entirely confident that ensuring the voltages are identical is practical. If I charge the two batteries separately, I would assume there will be small difference between the two given the quality of the chargers.
Now the difference may be only negligible, but I would assume there would be some at least short lived high current between the two when connected that would be very unhealthy for the batteries and potentially hazardous if done with every charge and use.
Would you have any practical suggestions for equalizing the batteries after charging? Would a large series resistor between the 2 work?
+Alexander Buckley Just make sure they are both the same chemistry, and same nominal voltage or cell count. (11.1V 3S), and that both are fully charged before connecting them in parallel.
If you change your mind about charging them separately, I recommend also connecting the individual cells in parallel. The ballence connector gives you limited access (in terms of maximum current) to those points, good enough for this purpose.
+Power Max
My original concerns were related to connecting to separately charged batteries together in-system. I am a computer engineer, I am good with circuits and all that... but batteries do not really fall into my knowledge area.
Even for small voltages, I can see there being a large transient on connection. I just don't know if that is a bad. There would not be any sustained high temperature that would be similar to shorting the battery. But on the chemical composition level I have no idea what impact that may have. Repetition of minor damage adds up. It goes without saying there are significant flight time and safety concerns.
I have started thinking about parallel charging since doing some further research.
It is the balance connector that makes parallel charging not so 'plug and play'.
Are you suggesting wire the individual cell from each battery in parallel for charging or during operation or both?
I am trying to come up with a solution here that is safe, electrically sound, does not require too much custom wiring or any steps that could be mistaken. I'd like it to be reproducible and simple enough for a lay person (idiot proof).
I am thinking now the way to go would be to equalize the batteries in parallel (cell by cell) using series resistors. I can make an assembly that can be attached and switch operated. After that, Y-cables can be connected for both power lead and balance lead, 'forever' keeping them as a single unit for both charging and use.
I am just wondering how they would behave, two cells permanently in parallel. It is obvious in the series configuration that each cell behaves differently. I just have no idea what impact permanent parallel connections have on battery life/capacity.
I wouldn't be surprised if this even was a beneficial arrangement, one that may reduce the chances of an individual cell dropping below it's threshold while the total voltage still remains over the low voltage cutoff limit.
Or one cell's charge voltage could be reached with limited capacity, triggering the charge stop. Meanwhile the other cell could have still taken more charge.
Or maybe both things happen it is a trade off, life for capacity.
I am just worried about some sort of favoritism scenarios occurring that I don't know about. Like one cell getting pushed to hard in use, hastening it's demise.
Looking for help .Losi dbxl the car. Problem is got trunigy 7 way switch connected to 4 slot inn receiver to run lights Was working well with 7.4v 1700mah standard. So decided to upgrade to lipo 7.4v 3000 the unit will not work. The unit powers up runs cycle on toggle nothing. I thought it was faulty so bought another one. Same problem. Swap to standard works fine. Now thinking run car on lipo use standard for lights? Question is can you mix battery and how would I wire this. Didn't want these problems but I'm stuck. Be nice to run the lot off one battery but no idea why it won't work. Tried most basic things. Can you Help.
No idea why it won't work. The increased capacity of the battery shouldn't make any difference if he voltage is the same - strange..
Hi mate great video I have a qestion about connecting parallel lipo batterys to a drone the lead I have made has two battery connectors an the connection to the drone is soldered to the board is it ok to connect one lipo battery at a time on a parallel lipo setup.
Personally I'd connect both together and then plus them into the model. It shouldn't matter but be careful. Best of luck!
Can you make a video where you connect four batteries to get double mah and volts. For example, pair two batteries and connect in parallel with two other batteries that are also connected in series? Or is it even possible?
Yes it is, personally I'd look at buying the battery in the size and capacity you need, this video was made years ago when batteries were not available in the larger sizes and pilots had to use these kinds of tricks to get larger packs and longer flight-times.. Thanks for the idea..
just a quick question the lg 18650 battery from ebay (Lithium Ion ICR18650 MF1 2150mAh ) 20x cells each cell is 2150 ah. The spec sheet says Max. Charge Current 1.0C(2,150mA). So when you have this pack 36v 10s 2p what is the maximum ah current can you charge it 2ah 42v current or 2ah current x 20 cells ~ 40 ah current at 42v. Now if you have 3x 10s 2p in parallel which is 36v 12.12 ah what is the maximum ah current you can charge thats 60 cells is it 60 cells at 2ah current which is 120 ah current for 60 cells or just 2 ah for 60 cells using cccv charger
Thank you very much
See the Li-Ion battery video I did. I've only used those cells in pre-made packs and in the Fat Shark battery adapters.. Best of luck!
awsome video! great work bro!
I got that same exact connector today. Its awesome to use my two 7.4 volts that I hardly ever use anymore because I bought a bunch of 3s batteries.
Great video. I found it curious that you made a BMX reference (we're very into BMX racing). On another note, if you connect two batteries in parallel (as in your example), does that mean that you're doubling the capacity while keeping the overall voltage the same?
Thanks
+Michael Boggs parrallel equalls the same voltage but higher capacity = longer flight time. Happy flying!
Hello,
I have a micro quad that use 1s Lipo, I was wondering if there is a probleme if I get my 2s lipo and set in parallel cel 1 and cel 2 so I will transform my 2s lipo in 1s . Do you see any problem with this ?
Thanks in advanced.
In theory, no. Be very careful and check everything many times before plugging in the cells and then plugging in the new 'battery' into the model
I'm looking in to getting the "Cirrus SR22T 1.5m BNF Basic" but I want to get some good battery life out of it, I'm thinking of getting 2 "Li-ion 4S1P 14.8V 3500mAh ENDURO Advanced Lithium" Batteries and joining them but it adds to about a pound of weight to the already 3.6 pound plane, how well would the plane be able to handle that extra pound? Thanks.
Difficult to answer as I've never had one. But that sounds like an awful lot of additional weight for that size model...
'Guess I'll need to do some checking around. Thanks for the quick reply.
Hi, I'm using 2 - 6s , 5000Mah LiPo's in series for a total of the 24volts you mention but my flight times are short. (130c rated per EDF MFG recommendations)is it possible to add a third battery in Parallel after the series connection to gain more Mah and thus longer flights? Vince
+Vince C not like that. I'd look at upgrading to a battery that's the right voltage and capacity for the job. Best of luck!
Hello.. I have a problem... I made a kool 2P 2S battery pack with 4 of these 7.2v power packs that has some killer power but- I can't run a DC Inverter from it cause it's too powerful I guess (Inverter won't run on a power bank over 15V)... and if i made them into a 4P battery bank then the power to the Inverter would be too low to run the Inverter.
What can I do?
+wildbillo68 not sure I follow, I'm guessing this isn't for a traditional radio control application? I'd look at a different DC inverter. Best of luck
Thanks for the video, brilliantly clear demonstration of the difference. I was wondering, are there any safety issues with connecting LiPo batteries in parallel? I am currently considering connecting two 8Ah 14.8v batteries to get 16Ah unit but I've read conflicting views all over the internet about the safety, especially when it comes to charging the unit. Sorry for the long question! But thank you in advance.
The main thing to be aware of is to make sure that the voltages of the cells in each pack are as close as you can.
When you connect two packs together the difference in voltage will drive a current equal to the difference in voltage divided by the resistance of the cells/wire connections. As the resistance is very low this could be a large surge!
Hope this makes sense. Happy flying!
will there be any change in the c rating if we connect multiple batteries in parallel? actually im thinking about entering a competition in which only low discharge NiCd and NiMH batteries are allowed , but the motor i have draws much more amps than the max outpur of the batteries. is there any way to increase the c rating of a battery?
+rashad reyaz parallel equals more current.. best of luck.
So although you probably mentioned this throughout the video, i've got a short attention span so i can't be bothered if you don't mind but should i use paralell or series to maintain the longesyt run time (double the mah), as i heard somewhere that one doubles the speed and the other doubles the run time.
Thanks
+Andrew Smart answered in the video ;)
If I'm running a 10.5Ah 6S Li-Ion battery, and I want to increase the capacity slightly, would it be ok to add a 6S1P pack(3.5Ah) in parallel to the setup?
Please see my later video on this topic - it should answer the question (short answer - should be ok)..
thank you, Very educational
Can you run two 6 cell 7.2 2000mah battery packs that are in a series circuit into a parallel circuit? Or will that cause problems? Basically asking do the batteries in a parallel circuit have to be single cell?
See the later version of this video (in description) for where I cover that exact topics. Best of luck!
Hey there this has given me great understanding . I want to connect 2x36v in series for my ebike to run a 2000w hub motor . On the series diagram in this video could you point out where you would have the ignition and the charger point connect to ? Cheers
+mert tanay depends on the voltage they need. If it's full pack voltage connect them to the output. Best of luck!
thank you youre video is very helpful !
Thank you for making these videos!
I use a voltage alarm on my battery, when flying my quad. Should I use 2 alarms, one for each battery if I had 2 batteries in parallel?
The voltage is the same across both packs as they are connected together (2:10)> This means you can use one alarm to monitor both packs. Be careful not to mix new and old packs together or the difference in the internal resistance will mean that one will supply more of the current than the other.
Happy flying!
Painless360
Thank you!
I guess I will raise my limit to be on the safe side too.
sir please help i am putting together some 18650 battery packs from dead laptop batteries about 12 .6 volts 20 ah with a 10 amp maximum discharge pcb to solar system i am setting up.my concern is is it ok to connect 2 or three of these packs in parallel to increase amperage to one charge regulator as is normally done with other battery types or do i assemble one big battery
Absolom Madhaka I wouldn't recommend this. If you connect them all in parallel you will end up with a 12.6v/60a pack.
If this is for an RC application then I would strongly suggest getting a new LIPO for the job.
So when connecting 2 batts in parallel, would I need a larger ESC?
How about in Series?
Thank you
The ESC rating is for the maximum current for the motor. Adding in series increases the overall pack voltage so you will need to check the esc is rated to handle the higher pack voltage. Best of luck!
thank you sir for your very understandable well spoken definition of power
It's there a way to use the balance lead to power two items simultaneously? I want to power an immersion rc FPV transmitter and also a low voltage battery alarm too. I'd prefer to avoid wiring my tx into the breakout lead so I can readily move it to it to different models.
Thanks in advance for any guidance.
Yes you can, connect both of the things you need to power to the outside pins of the balance tap connector to get 12v out of the pack (assuming 3s). Using the balance tap also allows you to pull lower voltages out of a larger LIPO too (i.e. connect just to two of the 3 cells in a 3s lipo to power an item that needs 7.4v.
Be careful not too pull too much power and be more careful to balance the packs if you are only connecting to some of the cells in the pack.
Hope this helps.
Painless360 i am whondering how far i can drain a lipo can i drain both 5000mah packs to 95% i know you cant go to 100% discharge but 90% to 95% shoud be ok because the packs are thunder power 7s with 70c burst rate so it will tax them less this is for a trex 700e dominator because the lipos disturbingly fit lol so i am going 14s so i can do mild sport flying i am trying to get my model under 5kg with lighter upgrades from kde plus lighter ceramic hybrid bearings plus going with a kosmik 200amp and a pyro 750 560kv competion motor which is lighter with plenty of grunt plus cutting and shorting down wires aswell plus cutting 1inches to 2inches of wire holds a gram or two lol plus steel abec 7 bearings weigh more than ceramic steel hybrids so losing quite a bit of weight helps i like longer flight times plus my hs is 2000rpm which is plenty of power for me i am not a stick banger reason you have more chance of killing your self plus taxing lipos which cant handle your flying style plus kde upgrades are air craft grade alumium which is stronger and lighter than stock so i will see my model drop weight under 5kg
Hi Jonathan, you should plan to pull no more than 80% from a LIPO pack regularly. Taking more starts to damage the pack physically and effects its performance. Plan to pull 4000mah from a 5000mah pack for long life and a margin of safety.
Hope this helps, happy flying!
I am making a Lipo pack with the batteries I have. It needs to be under 60v hot of the charger for my electric bike to run. I need to know will this will work. I have four 5s 5000mah and two 4s 5000mah (all close to same cell voltage) batteries. I'm trying to make (what I think is ) a 14s 2p 10AH pack? (not sure) This is my plan....connecting 0ne 5s + one 5s + one 4s into series = 14s 1p 5AH X 2 into parallel = 14s 2p 10AH pack? Does that make sense? If not what can I do?? Please help.
This video is more about using 3s packs to make a 6s pack, or a large capacity 3s pack for longer driving/flying. You can connect the pieces you have in series, that's all the LIPO's do internally anyway - connect single 3.7V LIPO cells in series to make the pack.. Be very careful..
Thanks - your info really helps.
5:00 slip of the tongue probably, but BOTH arrangements double the power compared to the single battery, because power = current * voltage.
I think it would have been clearer to say that parallel gives you effectively a 3s 4000mAh 10C battery and series gives you a effectively a 6s 2000mAh 10C battery, both able to put out the same max power, which is twice what the single battery can do.
Maybe introduce the 3s2p / 6s1p notation, too.
It would also have been important to say that parallel connection can be dangerous if the voltages of the batteries are different, as they will try to equalise voltages (one charges the other) and high currents can flow in that situation if you do it wrong.
🤣
Will a BMS help in this case? Parallel charging of similar battery packs
Therefore, to obtain a "double capacity powerpack" from two batteries, we should connect them parallel to maintain the voltage of powered circuit?
H
Yes, connect them in parallel, you will get twice the run time (or a bit more) and your motor gets the same voltage (but maybe a bit more constant).
However, you need to make sure that the voltages of the cells you combine in parallel are very very close.