WEBVTT

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I mean think back to when you were a kid

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What sounds more fun than like one of those cool ride-on power wheels things?

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I've noticed the fact that this is not a brand name power wheels

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This is a cheap Chinese knockoff, but that's not the point of today's video. The point of today's video is what's more fun

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than one of these power wheels ride-on things a

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souped up one and as it turns out

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You can make them go double triple or even quadruple as fast

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Simply by overvolting them

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Now you could do that by just buying yourself a in this case

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This is a 6-volt model so a 12-volt battery at the hardware store and plugging it in

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But this is Linus Tech Tips so instead of that I decided to order myself a

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DIY

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lithium battery kit

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Let's

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see how this goes

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Pulseway Pulseway lets you remotely monitor and manage all of your Windows Mac and Linux machines from one app

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Create your free account today at the link in the video description

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Now I hadn't originally planned to do a video about this

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So you guys are gonna have to forgive me if I am not as prepared as even I normally am

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But I am going away to Disneyland in three days

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And I need to queue up enough videos for a while. I'm gone

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Real talk real talk right now

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And I was telling Ed about this plan that I had to sort of trick out one of our power wheels

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Not actually this one and he was like, oh we should we should do a video about that and I was like, oh, yeah

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I mean, I'm still kind of like learning and I really don't know if this is the most optimal way to do it

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And he's like, oh, yeah. No, it sounds like a video

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so

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basically what I've ordered here

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So these are 18 650s. These are 3,500 milliamp ones. I think they're from

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Samsung it's either Samsung or LG chemical on or whatever. They're like

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Chemicals like division is there's either Samsung or LG cells and then these are high current ones because

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Not on this one, but actually on the two-seater that I am planning to have all of this end up in

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You can actually see some pretty impressive peak power draw so I got a bunch of these

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Then I picked myself up

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this puppy so this is the

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charging

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Controller board that you need any time you're building a lithium battery

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And I can't remember if this is a balance charger or not

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So I'm gonna have to look that up so I can determine exactly what type of charger I need to use on it

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I do have a balance

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Lithium battery charger at home, but I forgot to bring that today

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All right.

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Ah, yes, you can see here,

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this is for seven cells in series.

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So parallel determines how much capacity you have

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and series determines what the voltage is gonna be.

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So this is a six volt model

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and I'm gonna be hitting it with about 24 volts.

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So we're gonna burn it out pretty quickly,

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but realistically I was gonna get rid of this one anyway.

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The idea is to make the Jeep power wheels

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that I have at home go twice the speed

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and we'll making this one go four times the stock speed.

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This is one of the kits from Veruzend,

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V-Ruzend, I don't know what they,

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I don't know how they pronounce their thing,

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but basically resists vibration loosening.

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It's safer.

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Hey, it's safe.

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Oh, yay.

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What we're doing today, building a lithium battery pack.

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It's a modular lithium battery pack kit.

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Just chill.

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It's all good, don't worry about it.

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Fully customizable.

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Where's the guide?

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Don't we have a bunch of like 12 volt batteries

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just like sitting in one-on-one?

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Yes.

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Well, A, I'm building a 24 volt battery,

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which yes, I know.

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And B, I wanted the weight and quick charging

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and I just wanted to do it this way because it's fun.

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Okay.

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To turn this bunch of cells into a battery,

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we need to wire together all of the cells correctly

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to get our 29 volts and 30 amps at full charge.

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To do this, we'll be creating a 7S3P battery,

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meaning there'll be seven cells wired in series

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and then three of those wired in parallel.

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Construction of the battery is pretty simple.

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Although if we wire up one cell incorrectly

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or even just drop a nut or touch a screwdriver

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across the wrong place,

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we risk causing a ShortCircuit that could electrocute us

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or at worst cause the battery to explode.

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Someone's going to blow themselves up.

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Okay, I think we should do the things first

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and then put cells in.

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So then theoretically, we can take your whole thing

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and blippity bloppity.

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Hold on, let me help you get that aligned.

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Okay.

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Do we have a rubber mallet here?

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No, we're not rubber malleting these.

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Why not?

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Because we're not.

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Because that's not a good idea.

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Well, I don't know, maybe.

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It's pretty hard to push on.

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We did this three more times

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and got what seemed like should be a ready to wire up battery

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until we actually thought about it.

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It's really easy.

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Before you begin though,

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make sure you understand how series

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and parallel electrical connections work.

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I want to brush up on the subject,

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blah, blah, blah, blah, blah.

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Don't ShortCircuit, that's bad.

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Got it.

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I wanted series.

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Parallel.

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Wouldn't I need to go from here to here though?

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Oh, that makes sense.

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In order to do that, you need to do every row.

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Oh, this is easy.

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Oh, maybe.

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Well, let's find out.

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Oh, they have videos.

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Okay.

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We'll be back in a minute here.

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We're gonna watch some YouTube to learn.

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Tinted that if we flip around every second cell,

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creating the connections will be super easy

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by just placing the bus bars across the top.

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So the good news is we weren't that far off.

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Pretty much these bars go on

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and we make all the parallel connections between ourselves.

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Oh, yeah.

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Like it ain't no thing.

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I'm, hold on.

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I'm just trying all my contacts here.

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We good, we good, we good, we good.

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Yep.

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Beautiful.

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Now we have to attach the...

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These ones?

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Yeah. I don't know.

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I don't know.

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So let's, we're gonna watch,

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we're gonna watch this other video now.

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BRB.

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All right, so we ran out of time yesterday.

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It's day two, but there's some good news.

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I was able to bring in the actual car that I intend to use.

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So this one shouldn't fry immediately

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when we hook this battery up, but there's some bad news.

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So I had planned to either hook this up

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with the battery management system

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for a single input charging, or I had planned

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to hook it up with this doodad

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and then use a balance charger like this one.

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But I forgot this is a maximum 6S balance charger.

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So this won't work,

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which means we're gonna have to use the BMS,

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except for one small problem.

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We can't find a single power adapter in the building

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that is, so you don't take the 3.7 volt nominal voltage.

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You take the 4.2 volt charge voltage.

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So this thing can't take magically like a 12 volt input

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and turn it into 30 volts.

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You need an actual like 30 volt charger.

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And 7S as far as I know is a pretty oddball configuration.

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So I'm not sure how we're gonna charge it,

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but I'm gonna start to wire it up anyway.

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I found a 33.6 volt one.

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Do you think it would work?

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33.6?

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Yeah.

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I don't know.

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What do you think?

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What do you think the tolerances are like

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on something like this for input?

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Probably fine.

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We have 29.4, is that what we were looking for?

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29.4, yeah.

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I knew those stupid hover shoes

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were gonna come in handy for something.

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We're gonna cannibalize the charger.

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Cannibalize it?

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Well, yeah.

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Well, yeah, cause I don't have a socket for this.

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So first things first.

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All the balance wires are on.

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There we go.

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And my negative,

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I believe this is negative.

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Negative charging, yep.

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My negative charging wire is soldered.

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Now what I need to do

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is throw on two positive wires

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to the opposite terminal here.

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So to the positive terminal

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at the other end of the battery.

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One of those will be for charging.

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One of those will be for discharging.

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Now I realize I'm opening myself up

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to some soldering technique critique here,

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but this is how it's going on.

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Alex, do you wanna solder me?

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I'm sorry.

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Let's go for a solder bath.

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Okay, that's lots.

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Oh man, I can feel the cringing.

00:10:00.750 --> 00:10:02.770
Just wait till The Verge does this.

00:10:02.770 --> 00:10:04.450
That'll make me feel better.

00:10:04.450 --> 00:10:07.210
So we've got our eyebrow tweezers

00:10:08.210 --> 00:10:10.970
and our butter knife.

00:10:10.970 --> 00:10:12.370
Okay, don't include that last bit.

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We don't wanna be too mocking of The Verge.

00:10:13.850 --> 00:10:16.210
We're not trying to make enemies in the industry.

00:10:16.210 --> 00:10:17.690
I don't have Captain Tape.

00:10:17.690 --> 00:10:20.870
We really need to get some more electronics project crap.

00:10:20.870 --> 00:10:22.170
So I'm gonna go get packing tape

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just cause I need to keep those wires out of the way.

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For all the viewers out there

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who know what they're doing with this stuff,

00:10:29.630 --> 00:10:31.510
make it better or worse,

00:10:31.510 --> 00:10:33.310
that in many cases I know the right way,

00:10:33.310 --> 00:10:44.730
but I'm doing it this way anyway.

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Now they say in their guide,

00:10:45.810 --> 00:10:47.150
you don't have to solder this,

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but I think that's really stupid personally.

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I think advertising, stop it.

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Okay, stop doing that.

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Oh, nice.

00:11:02.250 --> 00:11:03.970
Now typically hat nuts aren't reusable,

00:11:03.970 --> 00:11:06.850
but I managed to kind of crush it back on there.

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Okay.

00:11:08.170 --> 00:11:09.230
All right.

00:11:09.230 --> 00:11:11.350
So we can test then.

00:11:11.350 --> 00:11:13.870
Well, first I'm gonna have to show you guys

00:11:13.870 --> 00:11:16.470
the before of course.

00:11:16.470 --> 00:11:22.140
Here we go.

00:11:22.140 --> 00:11:23.520
See, pretty boring.

00:11:27.550 --> 00:11:34.190
This is not the recommended way of doing this.

00:11:34.190 --> 00:11:37.420
Again, if you wanted the recommended way,

00:11:37.420 --> 00:11:50.300
would you be watching my video?

00:11:50.300 --> 00:11:52.060
Oh, we're gonna ruin our floors.

00:11:52.060 --> 00:12:02.200
Here we go.

00:12:02.200 --> 00:12:04.160
There's no steering on this floor.

00:12:15.700 --> 00:12:16.980
How's my phone?

00:12:16.980 --> 00:12:18.360
Is my phone okay?

00:12:19.290 --> 00:12:23.400
Oh, it sticks out of my pocket sometimes.

00:12:23.400 --> 00:12:25.480
It's okay.

00:12:25.480 --> 00:12:28.280
So that hat nut, not a great solution,

00:12:28.280 --> 00:12:29.880
just bending it back.

00:12:32.840 --> 00:12:35.180
So this is our pre-test.

00:12:35.180 --> 00:12:37.060
This is with the original battery,

00:12:37.060 --> 00:12:39.320
which has like a somewhat fresh charge.

00:12:39.320 --> 00:12:43.220
It's not super fresh, but it's not like the worst either.

00:12:43.220 --> 00:12:53.650
So reverse, first gear, second gear.

00:12:53.650 --> 00:12:58.030
Now it's really important for a reliable operation to install,

00:12:58.410 --> 00:13:02.330
people do either 30 amp or 40 amp breakers in these things,

00:13:02.330 --> 00:13:03.390
but I'm gonna do that later

00:13:03.390 --> 00:13:06.090
when I do my whole ESC upgrade

00:13:06.090 --> 00:13:08.830
with the sewing machine pedal and all that kind of stuff.

00:13:08.830 --> 00:13:13.040
So this stock connector no longer has any use.

00:13:13.040 --> 00:13:17.850
We are wired up now, baby.

00:13:17.850 --> 00:13:19.470
Oh, that's reverse.

00:13:19.470 --> 00:13:24.240
It's definitely faster.

00:13:24.240 --> 00:13:26.700
That's first gear.

00:13:26.700 --> 00:13:28.760
And we need to move over to unit 101.

00:13:36.320 --> 00:13:38.890
Let's turn it up to high gear.

00:13:38.890 --> 00:13:39.730
Woo!

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Oh! Oh!

00:13:44.960 --> 00:14:01.060
That was an undesirable.

00:14:01.060 --> 00:14:02.500
This is really hard.

00:14:02.500 --> 00:14:07.550
I can't even use, I can't even use my foot.

00:14:07.550 --> 00:14:08.390
Oh really?

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No, I'm just using my hand.

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Oh Lordy.

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There we go.

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Oh yeah.

00:14:21.690 --> 00:14:22.530
J-turn.

00:14:24.500 --> 00:14:32.050
Oh, I tried to throw it in forward.

00:14:32.050 --> 00:14:35.470
Wow, the traction's actually pretty good out here.

00:14:35.470 --> 00:14:36.410
So there she is.

00:14:36.410 --> 00:14:37.730
She's a little toasty.

00:14:37.730 --> 00:14:41.730
She's definitely ready to be left to cool and then charged.

00:14:42.090 --> 00:14:44.930
And that's it.

00:14:44.930 --> 00:14:50.000
That's a DIY battery for better or for worse.

00:14:50.600 --> 00:14:54.040
And this whole mess is brought to you by Memory Express.

00:14:54.040 --> 00:14:55.700
Memory Express is the place to go

00:14:55.700 --> 00:14:58.840
if you need any kind of electronics products in Canada.

00:14:58.840 --> 00:15:03.060
They've got computers, tablets, phones, home theaters,

00:15:03.060 --> 00:15:05.240
pretty much you name it, and they've got it.

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And with their Uber price beat guarantee,

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they will beat any price both in-store and online

00:15:10.380 --> 00:15:11.640
from a Canadian retailer.

00:15:11.640 --> 00:15:12.440
So go check them out.

00:15:12.440 --> 00:15:15.120
You can get them at the link in the video description.

00:15:15.120 --> 00:15:16.020
So thanks for watching guys.

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If you disliked this video, you can hit that button.

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But if you liked it, hit like, get subscribed,

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or maybe consider checking out where to buy the stuff

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we featured at the link in the video description.

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Also down there is our merch store,

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which has cool shirts like this one

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and our community forum, which you should definitely join.