DIY E bike 72V 20H Battery build - Part 1

Part 1 of my ebike battery making of.
Used 100 lion 21700 Samsung 40T, ended up a 20S 20AH battery.
The final design changed a lot of times, because the space inside my bike frame is small.
Hope it helps in your project. Any questions just ask in the comments, subscrive the channel, I'll upload more videos of the battery and the Ebike itself.
Part 2 - • DIY E bike 72V 20H Bat...

[@MrLWFred]

Your english is just fine. You speak better english then most my american friends. Thanks for the great video. by the way, the word is sheet. lmao. I'm just playin bro

[@bregbarega3717]

I think a battery pack is not a toy, not a kind of project where cutting corners, like hot-glueing them together is acceptable, compared to the size of the whole project, ordering some proper spacers is nothing, everyone should use proper battery spacers; First, they are flame retardant in theory at least, second the leave a small 1-2mm space between cells and let them naturally expand and contract as they charged or discharged, warmed or cooled down. That space is important for safety.

[@danekunderhill4812]

Nice work!

[@e-biker8406]

Thank you, check the other videos, the spot welding technique is not usual to see on video :)

[@DevonKocevski1]

Watching for my 2nd time, realized I didn't like it the first time. And now, 100th like!

[@e-biker8406]

Thank you :)

[@georgemc1030]

Nice video . In which store did you buy these batteries? Thank you

[@e-biker8406]

Thank you. I bought from www.nkon.nl, great batteries at great price when it have promotions

[@CryoGenic]

Have you had any problems with the battery overheating in anyway or running slightly higher temperature than desired. I want too glue my cells together but I’m worried not leaving gaps between using cell holders that overheating may be and issue , thanks

[@e-biker8406]

Hi. The battery in mu case runs at a very safe level, 80A peak, 50A constant, the battery can handle 200A, so it won’t heat that much. If your setup is different and you’ll use much more amps can heat more.

[@CryoGenic]

@@e-biker8406 that’s awesome thanks for the info I don’t plan to run more than 45A at 48v so this will be great as I can save a couple mm of room per cell and make it slightly more compact, thanks again!

[@e-biker8406]

@@CryoGenic I think you’ll be safe. Just wrap the battery really tight and make sure is well secure to the frame or battery box. At 45A the battery will be slightly warm.

[@tofanalexander]

Yeah... Samsung cells are the best. My new favourites are the 21700 48X

[@tofanalexander]

After 3000 cycles 70% capacity still available!!!!!

[@rickstard73]

@@tofanalexander That's greta, thanks, i'll look them up 🙂

[@simengineering9183]

How many amps would be this config......??Quick question, I just got a 72v battery pack 20s and believe is 6p, have 120 cells in it (liitokala 5000) but not sure how much amps really is as it doesn't have any labels.

[@e-biker8406]

If is a litokala 26650 50-A, it has a 50A peak discharge, 6P will be 6X50A= 300A of peak discharge, ij the safe side I would consider 30A, so 150A of continuious discharge should be the battery max amperage.

[@tone33012]

Very nice! Is there a calculator on the web that can tell me how much batteries I need to make a certain voltage and capacity? Obviously I would also need to input the correct information per cell as well. Take care thanks!

[@e-biker8406]

There’s a calculator if you use used cells, the calculator shows you how to pair them. If you’re gonna use new cells you don’t need a calculator.

[@e-biker8406]

How many volts and AH you want?

[@tone33012]

I’m interested in building myself a 60V 20A battery. I know it will be 17 Series or 18 Series but don’t know my parallel yet. I’m still learning. Thank you for replying!

[@e-biker8406]

@@tone33012 it’s a 16S, 16 cells in series. For a 20Ah, just divide the 20Ah by the Ah of each cell, for example a 3000mah cell, 20/3 = 6.666 cells, so you need to make a group of 7cell in parallel and connect 16 of those groups in series, the battery will have 112 cells total.

[@tone33012]

Thank you thank you. I’m going with 17 series just in case of voltage sag. Still learning how to plan and organize the cells. Also have to make a wooden box. Etc etc.

[@Jacob-og9pz]

Is the casing the negative cathode?

[@pedrocarvalho5824]

Yes, all the casing is the negative, if the battery have a wrap like it's supposed to, you'll only have connection on the exposed part at the bottom of the battery.

[@_nowayjose_]

Nice how many amps does this put out

[@e-biker8406]

My BMS have 80A of discharge, but the battery itself would be able to peak of 200A, 40A per cell X 5 cells. 200A is an abuse, 80A it’s more than enough for me.

[@_nowayjose_]

Cool never built a battery befor came across your video so I can do everything the same just get a different bms if I want a bit higher amps right ?

[@e-biker8406]

@@_nowayjose_ sure. The battery should be suited for your needs, more Amps? More capacity (range)? More volts (speed) What are you thinking? I’m glad to help

[@e-biker8406]

@@_nowayjose_ how many amps you want? 80A already very powerful

[@_nowayjose_]

@@e-biker8406 yes I decided I’m doing 80amp but really want 100amp do you think I’m pushing it I have a 3kw 72v motor with a Kelly controller

[@globalgreenvillag]

Sir If i want 60v 20ah How much i have parallel

[@e-biker8406]

Hi, for a 60v battery you must have 16 in series. For the 20ah that vary with the cells you'll use, with a 3000mah cell you use 7 = 21ah total, to calculate you divide the total Ah you want by the Ah of the cell you'll use.

[@Maxttor]

O valor máximo em AH total deve estar sempre abaixo da capacidade do BMS?

[@e-biker8406]

AH é a capacidade da bateria, a quantidade de energia que a bateria consegue guardar. Deves estar a falar da capacidade de descarga da bateria, se tiveres uma capacidade de descarga máxima de 100A, o BMS deve ser ou deve estar programado para limitar a descarga abaixo desses 100A.

[@Maxttor]

@@e-biker8406 A minha pergunta é porque comprei baterias de litio para lanterna tática, tem alta capacidade e estarei mesclando com baterias dessas comuns como tem no seu projeto, deverei estar adquirindo um medidor de capacidade total no final verificar se não está acima da capacidade do BMS

[@e-biker8406]

@@Maxttor não aconselho de todo a misturares baterias, nem novas com usadas, muitos menos de marcas e características diferentes. As baterias para lanternas geralmente têm muitos mAh mas poucos A (amperes) de descarga. Cuidado. Mau uso e aplicação de baterias de lítio dá incêndio 🔥 🔥🔥🔥🔥

[@Maxttor]

@@e-biker8406 quando eu ponho o multimetro pra aferir a corrente, o marcador cola no máximo =>10ah, como é dificil achar um multimetro que marque mais que 10 vou ter que comprar algo especifico com capacidade de aferimento de sobra

[@e-biker8406]

@@Maxttor não precisas de multimetro. Qual a marca e modelo de bateria?? Vê as especificações da bateria na internet. Se não tiver marca nem modelo, ou se for marca chinesa/ genérica, não arriscava usá-las numa bateria para ebike.

[@lanecole1217]

Can you build me a custom battery like yours? My ride, EScooter, 72v 3000w with 80A controller...

[@e-biker8406]

I had aswer you in the other video. It’s a hard item to ship, where are you from ?

[@mohamedshafeelmohamedbilal6364]

@@e-biker8406 sir how can I perfectly check the Ah of 18650 cell

[@e-biker8406]

@@mohamedshafeelmohamedbilal6364 you can see online the cell specs, in case of used cell, some chargers have that testing function for the cells

[@mohamedshafeelmohamedbilal6364]

@@e-biker8406 ok

[@wagnerbrochini3892]

Olá, qual a chapa de cobre que utilizas?

[@e-biker8406]

Boas. É chapa de cobre de 0,2mm comprei na Amazon.

[@wagnerbrochini3892]

@@e-biker8406 Perfeito amigo, sabe dizer qual a corrente máxima que essa chapa conduz e se ela aquece de algum modo na utilização? Grato novamente!

[@e-biker8406]

@@wagnerbrochini3892 dificilmente vai aquecer, 0,2mm de cobre tem a mesma condutividade de 0,4mm de níquel puro. E não usei tiras finas, geralmente são usadas de 8mm de largura, para ligar uma célula à outra, neste caso usei uma tira completa que liga todas as células umas às outras. Tendo mais área (quantidade de cobre) aumenta ainda mais a condutividade.

[@wagnerbrochini3892]

A corrente máxima que teu setup pode puxar, sabe qual é?

[@e-biker8406]

@@wagnerbrochini3892 a bateria de momento tem uma BMS de 80A. Mas a amperagem máxima a puxar neste setup seria de 175A, provavelmente valor de pico, e por segurança uns 140A constantes.

[@PauloRicarful]

Tu és tuga não és? 🤔

[@e-biker8406]

Ahah nota-se o sotaque?

[@raxmoaweissumayo9300]

Give me name battery brother

[@e-biker8406]

The name of what?

[@e-biker8406]

Ohh the name of the cells. That’s like cyber said. Samsung 40T