Build SPIM08hp LiPo into 7s 24v packs with BMS

Battery cells j35.us/12x-SPIM08
eyelet kit j35.us/Holepun...
BMS j35.us/2s10A-BMS
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FAQ:
1) Where can learn more about batteries? j35.us/DIYlithi...
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8) Why not use Supercapacitors?
A. Batteries work better at this time, caps are rare and expensive devices that are very good at doing things not needed for storage systems typically.
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[@unionse7en]

Datasheets usually specify a compliant pad (foam) in between pouch layers and also a uniform clamping pressure for the entire sandwich of around 4-18 psi. This pressure controls swelling and also ensures best performance as it helps the electrodes inside have the best contact.

[@MarkParkTech]

In case your curious, Kapton tape can withstand temperatures of 500° F or about 260° C long term, with a max short term capability to withstand temperatures of 572° F or about 300° C. I don't know what the definition of short term is, but I wouldn't want it to be at the max temp for more than a few minutes personally, or preferably ever. With the application in the video above, the temp should never get anywhere close to the long term temp unless something goes really wrong ( short ), so it's a good use case.

[@hlkotzehendrik7198]

Hi can Iput them in parallel with deep cicle 12v in my solar panel array. Appreciate if you can help.

[@alexodor6508]

Good idea but not a great implementation, because kapton tape was designed for use as a thermal isolator to prevent electronic components absorbing heat when neighboring components were heat gunned or soldered to pcb’s. Isolators also act as insulators in the case where the bms is fully encased by the kapton tape, essentially you have create a thermos when leaving no path for the components to dissipate heat. Small detail, but often is the difference between a thermal runaway event and having a standing house.

[@geraldkoth654]

I used a special aluminum solder to tin the aluminum and regular solder for the copper. Then they could be fused together with solder.

[@demolitionwilliams7419]

The aluminum solder did well? How is it 1 year later?

[@corrigan88101]

SAFETY NOTE! Be sure you don't place the rivets to close to the metalize pouch edge on the contacts. I did this and luckily I got a few sparks to let me know something was wrong before I completely seated the first rivet.

[@willfriar8054]

i'm making a power wall with these. i've made them with aluminum clamp pieces that allow four to six parallel and helps space them out so as to not make overheating a problem. the clamp screws allow easy replacement of cells and only require one hole in the tabs . that small screw allows the bms to measure voltage for each cell at the joint between cells. all easy to assemble and take apart to reconfigure or fix. if you want to see or are interested message me here.

[@bungle555]

I'd love to see this. Any chance you can post a photo and maybe link to parts? I'm trying to do something similar. It's easy enough to connect these in series with rivets like Jehu did since the tabs can be bent towards each other, but in a parallel configuration, that's not really an option since you have to connect each tab to *both* neighboring cells.

[@michaelkramer111]

I would love to see/know what parts you used. Stuck trying to build a pack.

[@Slicksparky]

Hi All, I'm an Electrician... Just a heads up, you can utilize a specialized paste called NOALOX. Its for any Aluminum to Copper Connection that will pass current. We use it all the time where we have copper wire inside aluminum terminal blocks. Go Get Some!

[@bungle555]

Great tip, thanks! If connecting these in parallel, would you also want to use it where the aluminum tabs touch each other?

[@yakz9885]

i think its nickel plated copper tabs

[@glenlivet4me]

Are those eyelets not brass?

[@cruiser97eric1]

@@bungle555 Yes. Aluminum grows an oxide layer on the surface when exposed to air and the paste keeps air away from the aluminum surface to prevent oxidation. Oxide increases the connection resistance and that leads to overheating at the connection under load. Without the paste things will work fine at the beginning (such as when the battery pack was initially made and tested), but over time the aluminum connections will degrade.

[@Jacob-ui6br]

Would you be able to wire the finished battery packs with bms installed , in series to each other?

[@crecclestonable]

Brilliant, I've been looking to make a power backpack for my Marita Garden tools. I've trawled online for 18650 solutions to no avail, but your video has energized me, this is genius, cheaper, better and awesome power output. Your camera work also awesome, best yet.

[@barrycampion9679]

Had excellent results with remote control car brushless combo setup , some produce over 7500w from 8s lipo using 200amp speed controller

[@SxWerks]

This is a simple straightforward project that even I can understand. Great video. Keep them coming.

[@DylanFahey]

OK, now I understand the BMS, thankyou for the help! However, how many of the BMS wires did you connect to the batteries, only 3 or all 6 wires and at which point?

[@cubacroll659]

Mr Garcia, u speed up the one part im soo clueless about, where to conect the white wires for the BMS :(

[@thedookster4143]

slow the speed down in settings

[@juancarloshernandez1769]

The Dookster I did that and it still to fast to understand how to hook up the white cables.

[@juancarloshernandez1769]

Cuba Croll I think that he did connected the white cables to the positives on each batteries.

[@thedookster4143]

@@juancarloshernandez1769 each cable gets to the joint of the two packs. So in the 7s you would have 8 cables, 1 for positive, 1 negative, then 1 for each joint

[@thedookster4143]

Look at this and it should help you understand that it is the joint area of where they meet. kzbin.info/www/bejne/inyao5hvrsSDrtU

[@GoingOffGrid101]

nice DIY pack! you should have a massive off grid system, it would be so easy for you :) love your channel cya around man!!!

[@jacquesb5248]

dude you make all this looks so easy

[@juanjimenez9705]

Great Video!. Quick question. can you spot weld them? Thanks

[@shadowsdeath6182]

You made the comment that you are using a cheap BMS for this project. What BMS would you recommend for a 48v wind and solar pack? I am looking for something that will keep the packs safe.

[@Timbodacious]

I know this is an old video but are the brads connecting those cells safe for the full 200a constant and 400a bursts or should i solder some 4 guage wire linking each cell as well?

[@RexSmithII]

Great video, What if one was to use these for high power, What circle connectors would you use different and what gauge output positive and negative? Let’s say I needed 200 amps continuously and 400 bursts at 100v So I would double each one to 2p or 3p

[@Timbodacious]

do the rivets like he did but also solder 4 guage wire to one side of the positive and negative connections which are riveted. On your first negative and last positive use 2awg cable it is rated for 350 constant.

[@roadrescue829]

Was thinking could one use spot welding to connect batteries? Could put 5-6 spot welds per connection giving more amp transfer?

[@nikkyng8141]

would you be able to make a video on how this battery can be configured to use in car audio application..... your videos are very helpful thank you

[@BlackLabelElite]

I wish he would

[@Todd_G_FPV]

Make a 4 cell battery with 4 cell bms! Boom good to go lol hope that helps

[@dreteyete7305]

It’s the same exact thing just configure for 12v

[@nigeldolman954]

Nice video as always Jehu. I have been looking at those pouch cells. I like the idea of using low resistance cells very lightly for a long life. They are for sure much cheaper than 18650’s, but also way less work. I think the chemistry is inferior and not nearly as long life. As long as they are cheap it remains an attractive proposition.

[@phateracing]

They're designed to be cycled at high C-rates. If you're only running them at 2-3C and don't use the max/min voltages, they'll last a long time. These cells don't have great energy density at a bit over ~100Wh/kg, but for a stationary application it's really not a big deal as long as you have the space for it.

[@penncapt]

@@phateracing But packing round hard cells into a square box lets air gaps. packing these into a box has a density like this. I put 42 of these into a 13.7 inch by 9 inch by 4-3/4 inch high box(custom made). Inside dimensions.7s 28 volt setup. I am getting 1624 watt hours out of it. 38.8 watt hours per cell. that's 105 amp hours at 4 volt. 10.5 amp hour each cell. 10500 mha. I am drawing at .03C(5 amp draw) to get this. But very impressive. 4.2 volt to 2.5 volt. On top of the box I added circuit breakers and wiring and some buss bars. And another cover. Total weight is 31 lbs. My box is 14 kg =1625 Wh. 586 cubic inches. 116 wh/kg. What can do better then that? under 580 cubic inches? Wiring, and attaching hardware included?

[@tfabeck]

Can you do a video on electrical safety? Especially on the 48v higher amperage setups and dangers associated with ac vs dc (if there is even a difference?). I am curious know at what point these systems can start to harm you.

[@AndreyBotov]

Hello! Thanks for your video! It is still very useful! But where you bought these batteries from the link - they are no longer available! Please tell me where now you can buy such batteries?

[@jamescollins822]

Can the SPIM08HP batteries be safely used for a 24V power bank to power a 3000w / 120 volt AC power inverter? I am looking to build a small 24V solar power system to power a refrigerator, some electronics and a few lights during a power failure. I was thinking of using marine batteries, but they would take up too much room and are heavy and hard to move around.. Also how many 24V packs would it take to store the power I need for a 18 to 24 hour period? I live in S.E. Florida so sun light isn't a concern. Thanks in advance for any information you can provide. Jim

[@ajemohaltom3560]

Eyelets... never would have though of that. Thanks. And I've tried soldering those tabs together, it is not easy.

[@tomamerman7699]

Yeah aluminum is very hard to solder. This method is the easiest. Others use busbars and nylon screws but this for sure is perfect.

[@lisamlisak]

Bus bars was my thought with stainless screws... Bus bars can be made out of copper tubing, flattened out, and drilled to match the existing holes...

[@chadforte2572]

Ajemo, I agree. I would never thought of it either and it seems ideal. I just ordered from Tom, and then followed Jehu's Amazon link to get the grommets. I'm getting excited! :-D

[@ScreamR19]

@@chadforte2572 I ended up going with a harbor freight rivet setup, surprised it turned out very clean with plenty of room to avoid shorting.

[@BlackLabelElite]

What kind of connection can u use to get the full power out of the cells I'm building an audio system very high power output ANY ASSISTANCE WOULD BE GREAT 👍

[@79ober]

Hey Jehu, I notice your camera is "mounted" on your head? Can you show that setup? Thanks

[@bh2017]

Another great DYI e build!! I am going to try this build. The battery cells seem like a great deal on Ebay. My question is , what would you recomend for a BMS that can handle 80-100 A burst? yet supply 40-60 all the time? This will be for a skateboard/e bike. Thanks

[@bobmutchseo]

I always like your videos bro, you just go out there and do stuff

[@speedrocket9238]

Jehu, I was wondering if you thought of making these into 10S 36V packs and use them in your Tripp Lite Emergency Solar generator project? I just got the hollow UPS and was musing over the idea of stuffing 2 10S packs with these SPIM08 pouches. Do you think they would fit? I know the original idea of the Tripp Lite project was to make something simple and off-the-shelf, but where's the fun in that?

[@jehugarcia]

Try it

[@ROBK636]

Thank You for the video. I soldered some 14g wire to the tabs and added 1/4 eyelets so the cells are bolted together for the wire connection. Its not the best and I am thinking about redoing this the way you have. My use is not high power right now around 3-4 Amps. Just hobby use for solar and getting into Lipo batteries.

[@cedarjack]

Come on Jehu.....SHow us how you connected the 7s BMS to this type of IN SERIES battery system. The part that you speeded through in the video was the point that a few of us really needed to see since you had the pos-neg soldered together. Please show us how you did it . Thanks

[@josephmelcher1312]

after he connected the negative and positive you just add each wire in order to the positive terminal in the pack in the stack.

[@incoldblooderz]

We can use this in the diving scooter?

[@popitagain69]

could you use these as a power wall to run a camper ? hot plate . lights tv ac maybe for a few hours

[@Paul68Luis]

Also, what's the best charger to charge multiples of these?

[@richybean2421]

i just got some of these cells, have you noticed any problems with them shorting to the cases? Im thinking most of that is because I used bolts, nuts and washers.

[@BlackLabelElite]

So if u were building a pack want MAX POWER WITH THESE CELLS WHAT DO YOU CONNECT THEM WITH?

[@vnigallahoir3523]

TinyBMS seems to be the thing I have found for my 150A needs.

[@jeromehuber596]

so if i wanted a 45ah how many would i need and how would i get 24v down to 16v?

[@johnchang3408]

Mr Garcia, I built 6 of those batteries. What can I do with those? I just wanted to built but I have no plan with to do with. Can I buy some solar panels and setup for off grid or on grid? If I can, how many panels should I buy? Those 7S1P battery has how many amp, watt ? What is the best way to charge and setup? Thank you for you time. John C

[@adrianlibert9682]

Nice video. However, I didn’t see how you connected the white wires to the individual batteries.

[@penncapt]

I think he soldered them to the brass eyelets. the black wire #1 wire goes to the neg end of the first cell. (Main negative of pack). the 2nd wire (white) beside the black wire goes to the positive side of the same first cell. Then the 3rd wire(white) goes to the positive side of the second cell. 4th wire to positive of 3rd cell. Keep going down the connector. All wires go to the positive sides of the cells. Having a red wire and calling it the positive is confusing,. all whites are positive . There are 7s connectors being sold that have the black wire on the wrong side. Follow the negative mark on your charger or balancer, then go from there.

[@bighorse215]

@Ronando even though its series connection it's still just 3.7v cells stacked it's one common negative and 7positive points.

[@ljprep6250]

Hey, good build. What's the width with those tabs taped down on the side? (I'm curious why you didn't use kapton tape there.) Tom's video didn't give the thickness, either. A tip for better soldering, Jehu, is to wet that sponge and wipe the oxidized solder and rosin off the tip. It will transfer more heat and faster, every single time. Quick question: I'm holding up the build of an ebike (the sale of which will allow me to make another 2 ebikes) hoping that you'll sell those Sony VTC6es to me some time soon. Are you going to get back into the sales of those wonderful batteries in the next month or two? I'd love to buy a whole box of Sony and another whole box of Panasonic. (we fans WANT you to succeed in DIY Powerwall board kits and battery sales, Jehu!)

[@penncapt]

The width with the outer wrap taped down is 4.7 inches , the thickness is .325 of an inch .The outer length. end of tab to end of tab is 8 inches.

[@katiecaudle120]

Do you have a parts list of everything you put into your solar generator? Inverter, regulator, hookups, control lcd?

[@maxsinventions8913]

I would also check internal resistance.

[@jamest.5001]

Did you capacity test any of these? Tom says 95-105% rated. Joe said his was in the 7.5ah hood! Just curious if you tested, and matched these? I'm thinking of building packs of 100 , for a 7s maybe connected in series, with 1" x .125" with 250-300 amp fuses, I may need spacers between ever so many cells , I havent built with these before, I'd rather build wit pouch, than 10k 18650's , I hope I can get this many, being on sale,

[@rodolfomartella4538]

Yo bro ,I bought 42 of these thank you for your video.cheers.

[@ScreamR19]

Have you had any issues with your batteries? I have some that are only 6000mah in capacity with high resistance.

[@ScreamR19]

@@davesnothere. That I understand and I think is mentioned in several places. Only thing that concerns me are the batteries i received that are puffed or get hot during charge. Pretty sure those are on their last stretch. Did you have any like this in your order?

[@Bagpipebrad]

Nice little pack, I would just avoid wrapping the whole thing up in the tape, if there is an expansion in the cells you don't want them to have pressure holding them tightly like that. A few pieces on the sides to hold the shape whilst still allowing the centre to bulge if there is a problem would be better.

[@phateracing]

Pouch cells need to be under some amount of compression to work properly under load. But at only 2-3C these things are pretty much never gonna have a problem.

[@MrGarda42]

phateracing just to make sure I understand correctly what you're saying; keeping these batteries and their current usage in mind, they DO indeed have to be wrapped? So as to keep compression and work properly?

[@DCW09]

@@MrGarda42 The pouch itself is all the compression that is needed in pouch cells like these. What @phateracting is saying doesn't make any sense... As far as packs being compressed and the cells expanding - yeah its an issue but id rather build for the use-case than a "what if" this is what battery pouches (thermal/ballistic resistant pouches) are for.

[@MrJjuuaann11]

Would it be possible to use theses cells to make a lipo replacement for a car battery.... maybe suggest a BMS or no BMS? I feel like 200Amp should be enough for a 4 cylinder.

[@jamest.5001]

Would you consider connecting with brass standoffs, 3mm x 3mm or so?? Or possibily 0.125" aluminum rivets?

[@MostynFaulkner]

Thanks Jehu. Another great DIY video.👍👍👍😎😎😎

[@catnarcosis6944]

Jehu, Is there a good way to make an engine start battery that will stay hooked to an alternator while running? These batteries need to stop charging once full and disconnect from the charging circuit, but an alternator needs to have a battery to keep working. I have seen engine start Lipo batteries for racing vehicles to reduce weight, but I don't see them used for this in everyday vehicles. I would like to replace 240 pounds of batteries in my boat with a lot less weight.

[@dr.projectx5142]

Made one for my scooter 24v 6s. Works great.

[@guerrillaradio9953]

I bought a bunch of these, and they're fantastic. I have a question, though. Mine came with a huge amount of the pouch material all around the cells. Did you cut it off? I'm so afraid I'm going to break the seal/start it on fire if I do, but it's huge, like an inch on each side, and makes it harder to make into a pack.

[@willfriar8054]

HE FOLDED THEM OVER AT THE START.

[@deathray0718]

your inverter in the dead short test video sounds like the bearing of the cooling fans was going bad you might need to replace those sometime in the future.

[@chrisuoaddotta3274]

Are there directions to this whole kit

[@solarforfuture]

got a module or 2. 7s from hookup. can i use an 8 s BMS i have on hand, leave off last lead..? ok with balance only.. rely on inverter shut off for low volt cutoff.. thanks.

[@ladderssnakes1755]

Will these work for electric fishing reels in a salt water environment?

[@starrvalley12]

Could they be used for a electric bike or would that stress them.

[@conordarragh7070]

Yes but you would need to connect more in series to get correct voltage he's doing 7s for 24v so say do 14s for 48v and so on most electric bikes won't pull more then 30 amps

[@Todd_G_FPV]

13s is 48v 14s is 52v but either will work on most 48v systems. However the 52v will obviously be a little faster

[@christopherallen7755]

I ordered some of these batteries and am trying to use them to replace my RV batteries and and in a solar setup. I am not sure what BMS to buy . My RV hooks up to 50a so should I buy a 4s 50a BMS?

[@unrealinventor2006]

100 amp bms(70 amp nominal)always overkill on bms

[@harrisonsanin8]

great video man. If I want to make a 12v solar generator, would you suggest making a 3s battery or a 4s? I want to get the most out of my cells and am not sure which one to do.

[@harrisonsanin8]

if anyone here has any suggestions that would be appreciated

[@Noone-l6g]

@@harrisonsanin8 4s all day, just gotta make sure you get a solar charge controller that can be set to charge at the appropriate voltage, the cheap ones are just for lead acid batteries. And of course make sure your 12v load wont fry on your full charge voltage of 16.8. Or if your using an inverter get one that will handle that voltage. .

[@nickhetzer2744]

@@Noone-l6g ore goe with lifepo 4 cells 4s they are at 14.4 v like an lead acid baterie

[@dadsquatch79]

@@Noone-l6g would the one that he uses in his cheap Kodiak build work?

[@soundsax54]

Saludo Garcia. pregunta. si se puedes usar estas batterias para un sistema solar de 24 v. tambien si se necesita un inverter especial para estas batterias

[@okolepuka808]

So I bought 20 of these, one is soft, more bendable, like it lost it's internal vacuum--is this cell a problem? Thanks Jehu

[@willfriar8054]

spim08hp flat cells from battery hookups. danger danger. they don't tell you. many of these cells have problems inside. there is current flow between the foil covering insulation layer and the terminals of many cells. measure the terminal to edge voltage along the seams. i'v gotten 3.9 volts off the foil wrapper. the cells will puff and be destroyed from self discharge. many of my 60 plus cells i bought do not have this problem. all the 30 % that puffed without ever being under load have the short to the foil. warning the edges of the cell packs carry current. not safe for marine environment at all. i only made 12 volt packs at higher voltages there will be bigger sparks from foil to terminals. danger if they self discharge they will puff and oh they say you didn't do good assembly. they don't say anything about do not touch electrically hot foil next to terminals. if a buss bar touches the edge of the foil it will short out the whole battery.

[@okolepuka808]

@@willfriar8054 thanks will check em

[@thedookster4143]

I am trying to come up with a solution to powering a fishfinder and two go pro cameras while i am in the field 6 to 8 hours per day. 50ah 12v would work just fine. could you maybe do a video on that?

[@unrealinventor2006]

I am building these 7s packs. .I need around 15 amps from each pack to max my motor out Plz tell me your recommended amp draw from 1 of these? Thanks for your videos!

[@glenlivet4me]

Each cell is good for 200A max. Buy a 20A BMS and you are good.

[@AlexanderBarish1]

Eyelet kit work fine for me, but i ran out of eyelets need a refill. anyone know which grommet replacements I should get? already bought the wrong size once.

[@fredslawson8128]

What type of wire connectors is that for the cell packs? Thanks. Spelt Kapton as captain in my search.

[@thedookster4143]

If you still have the footage, could you show the white wire hook up of the BMS ...?

[@Paul68Luis]

How would you make 7s10p pack? Would you make the 10p and join the 7 packs or vice versa?

[@jehugarcia]

Can be done both ways.

[@jamest.5001]

Pre tin the wire on the xt connector, it will go through the hole better. And solder goes where solder has flowed!

[@juvey90]

Anyway you can do a video of you using 1 or 2 of these batteries to make a external power bank to charge cellphones and other devices?

[@flipnunes84]

Hello Jehugarcia, isn't that kind of batteries better for a EV than the normal 18650? It can handle more amps

[@onegreenev]

These are higher capacity pouch cells with fewer connections needed for assembly.

[@ceyloninvestor722]

you can find this kinds of cells inside of nissan leafs batteries..

[@onegreenev]

@@ceyloninvestor722 Leaf pouch cells are much larger, and nearly impossible to remove from the canister as they are glued together within the canister. If you have room just use the as built Leaf modules. Problem is you can't just use 7 single cells. All Leaf modules are 2p 2s and can't be broken down to single cells.

[@davidwattierfilsdegabriel2933]

@@onegreenevQue voulez dire simplement Cordialement

[@davidwattierfilsdegabriel2933]

@@ceyloninvestor722   BATTERIE Nissan leaf • Type Lithium-ion laminées • Tension V 350 • Capacité kWh 40 kWh, 24 modules • Nombre de cellules 192

[@electrikeseb1247]

hello jehu I'm french and I find the spim08hp interesting the question I ask myself is it reliable and after what I saw on the site they are used ... I often watch your video but I understand very bad English lol see you soon be thank you in advance

[@markgiles8527]

Hi. Could you explain how to make this battery into a battery to power a large multi rotor, like DJI's S900 and S1000 Spreading Wings Platforms. Batteries are way too expensive for drones so I'd like to make my own. Like what you just did but for use on a drone. I'd also like to have a voltage and % display. Any help and directions greatly excepted.

[@Tsmace33]

Thank you for explaining BMS

[@NullBlox]

whast the measurements of these cells? also how bug when folded?

[@bereal1251]

Jehugarcia thanks for this video I build 2 5s pack using your method I'm gonna run them in series to make a 10s pack for a electric skateboard I'm trying to figure out the range I would get on these battery if you can help I would appreciate it thanks and I remember you using these cells to build a eboard but I can't find it:(

[@QUADBOYification]

Can not find the cells with your link.

[@bj97301]

Do you think the eyelets could do 200a?

[@FullSendPrecision]

If that BMS can sustain 20amps I'll eat my boots.

[@catnarcosis6944]

In his list it says 10A. Which means 5 with these cheap devices. IMO

[@unrealinventor2006]

Got a question for you. 1 have a 120v controller. What would work better:16.8 volt packs x 7=117.6 volts( full charged 4.2 volts per cell) or 24 volt packs charged to( 4.0 volts per cell)?

[@glenlivet4me]

10s * 3?

[@barrycampion9679]

Try using 100/200c discharge lipo . batteries,higher the c rating the more constant power.

[@luismalagon9084]

hi, i am kind of new to this. but i thought, your doing a 7s for a 24v pack and that would mean a 8ah pack. but you say you used a 20ah bms and that you intend to do another project were you are going to use 6 of these packs and you say 6X20=120ah. could you explain? cuase i am thinking on doing a 7s 30p for 240ah. is that to crazy? was thinking initially to do 30p to get the 240ah and then take those packs and assemble the 7s. but then i thought the gage wire would be to big to handle 240amps. so i remembered this video and thought, why not do what jehu did, the 7s 24v packs. do 30 of those and then do the 30p to get the 240amps at the end. this way i would use smaller gage wire. simpler packs and would have the 24 volts right out the bat, and if a pack fails down the road, just have to take that pack out with out losing the 24v and only sacrificing the amps in that pack. please give your thoughts. would highly apreciate.

[@mainesmith2183]

Are these good for electric go kart

[@randyjack9584]

It's time to invest in a tripod for a steady camera, my man. Great video.

[@tropicalspeedbmw]

doesn't galvanic corrosion only occur when something like salt water travels over the two dissimilar metals?

[@dannyferreras8974]

hello i'm new in building battery pack . what to know if i can make a 48v 13s spim08hp for e-bike or is just better to build two 24v 7s spim08hp pack and what charger should i use ?

[@renebenoit9187]

Would you use these for Solar? For a cottage?

[@glenlivet4me]

I did. Works great.

[@mikekanak9584]

What's your thoughts on using these packs to run a trolling motor? If so how many packs would you need to get 120 AH @ 12V I think it would be 15 right?

[@Noone-l6g]

thats what Im doing with these. You only get the AH increase for the parrallel connections I believe. so 3 in series x 15 in parallel =45 cells would be 12v 120 ah. Unfortunelatley you will go slower once they drop in voltage so maybe opt for a 4s pack. Disclaimer: you may or may not burn up your 12v motor running it for long periods at 16 volts, I got a speed controller/potentiometer to eliminate this risk.

[@thehightechredneck9777]

Do we know who these cells are made by?

[@unrealinventor2006]

I know you can draw huge amps for a short time but in the real world. 15 amp draw long team still considered low draw?

[@garycotz563]

Yeah.... ebike... AND... what was the ending HxWxD of these bad boys? Using Horror Freight plastic ammo cans to house these. They work GREAT for my 4s2p (12v-ish) or 8s1p (24v-ish) 38120 Headways.

[@mikegyver3193]

Thank you for your videos. Can you still live video about stored energy for trailers. Your suggested best way with convenience and space. May God bless you and your work and your endeavors. 🙏🏽🙏🏾🙏🏿😇🙏🙏🏿🙏🏻

[@techlove5831]

What about spot welding them together

[@juancarloshernandez1769]

After you connected the positive how you hook up the white cables at that speed i cannot see or understand how to connect them??

[@jehugarcia]

www.electric-skateboard.builders/uploads/db1493/original/3X/9/5/952b92ace079e86aafd56c1aa428ef8ba3235455.jpg

[@juancarloshernandez1769]

jehugarcia thank you 🙏🏼 you’re the best .. I am a fan of your work god bless!!

[@musicinspire1745]

You can use small, short screws and nuts with lock washers, which I would trust more than I would islets. Additionally, you can hook up your wiring from the BMS easier to the screws and nuts than having to solder onto islets. Soldering introduces heat into the ends of the packs, which is not good. So, there are a number of ways to do all this. It's just up to the individual.

[@unrealinventor2006]

I just bought 62 of these for an e-bike project at $4.50.each (496 amp hour at 3.7volt) $318 with shipping. Get them while they last!

[@starrvalley12]

Did you build your e bike battery, I'm thinking of doing two 24volt = 48 volt, for a 48 volt front wheel. It will be interesting to see the distance they will get.

[@unrealinventor2006]

@@starrvalley12 As you can see I just ordered the batteries.I have built several 18650 packs and 1 pouch lipo battery pack,but not at a high voltage. I am not a big fan of pouch cells but like everyone I am trying to get the best deal I can. I think headway cells would be better but the cost is just to high.Hell I don't even know if the motor(hub type),controller (5000 watt -13000 peak) are any good yet. I bought them 5 years ago. I do know i will be pulling over 100 amps at close to 120 volts. The controller is the biggest one I have ever seen even after 5 years. The hub motor is rated at 150 lbs of torque and 17 to 19 hp. So I will need a powerful battery bank for sure.

[@unrealinventor2006]

@@starrvalley12 I have built 1 1000 watt 48 volt e-bike with lipo pouch cells. It made around 1200 watts peak and had around a 25 amp draw. These cell are way better than the ones I used, Just be sure you do not short these cells 300+ amps is no joke! I watched many videos before building my first pack.

[@starrvalley12]

@@unrealinventor2006 , Thanks, I will definitely be careful with these.

[@michaelkramer111]

​@@starrvalley12 Did you guys ever build these packs? I plan to build multiple 7s packs but haven't decided on how to make the series connections. I also tried soldering these but the solder didn't wet the tabs at all. Might not have had enough heat, or maybe I need the aluminum compatible solder. Any advice??

[@trumpwon9945]

There is something you can do about it! 2 Choices Get in touch with the manufacturer... Or You try different materials until you figure out what works the best.

[@govindverma2241]

what u do with all these battries

[@penncapt]

Questions for all. If you were to do this as 4s packs. mount a few packs in a box, then install into a car. Many lithium chargers can take the 14.5 volt charge from the alternator and manage charging the 4s packs. Problem is, the alt needs power supplied to it to create a field to charge. Once the packs reach 14.5 volts, the alt will be shut down by the car's voltage regulator. Is there any way to get a charger to send a 12v signal out until the packs reach 16 volts? then cut the 12 volt line . I guess a charger that knows how to manage a cars onboard voltage regulator? And a shunt that would limit the 16 volt to 13 volt so the car is not damaged?

[@mohdsaifulmohdsaid852]

i need to run brushless motor rated 25kw, 100v, how many of this battery i need? tq

[@mariogermanosorio669]

I have a question. To make a pack of lithium batteries to 12 v I can combine cells of different capacity to have 3 pack of 21 Ah. Using batteries of 2.2 ah and 2.6 ah ?

[@jehugarcia]

Yes, you make groups of matching capacity

[@dadsquatch79]

So could you make 12v packs using these pouch batteries and then wite the packs in series to maintain the 12v and gain more ah capacity?