The battery builders club

They are crimped connectors! I want to be able to disconnect the p groups

Gonna go out on a limb and say you honestly cannot use those in Esk8 dude. Except maybe in a top mounted brick pack build. Somebody else can go into more detail, but it’s simply not safe.

Bullet connectors are far more safe, XT-60’s much more so though bulkier.

But you can’t use those crimp connectors. Safely at least.

5 Likes

They are bullet connectors

There’s “bullet connectors” like those for automotive or other use, ant then there are Bullet Connectors for high current RC use.

Those are NOT the kind of bullet connectors you want. I would not trust them anywhere near the current levels we normally run, with the amount of vibration a skateboard sees.

4 Likes

So I should just solder both ends and make it nonremovable then?

1 Like

These or these are bullet connectors. You should definitely not be using anything crimp to carry current. And frankly I would suggest abandoning the idea to disconnect P groups unless you’re dead seat on flying with the battery, which is going to take a good bit of work to be possible as regulations aren’t just under 99wh, because all you’re doing is adding fail points.

You need a lot more heat. The solder should look smooth, anything jagged or rough is cold and will break.

1 Like

That, or buy some RC bullet connectors, and solder them in place.

1 Like

Yeah… was going to try to say this but didn’t want to sound incredibly rude lol. In the end, sounding rude on the internet is definitely better than a fire or him street facing from some sort of electrical related lockup.

Draft I deleted:

Cannot overstate just how much amazing knowledge there is in this thread. Seriously, it’s fucking unreal.

Scroll through this thread and look at pictures. Attempt to copy how things look from others. Others will definitely have some fancy tools and such, but you can get pretty close without. There’s more than a few modular pack builds being posted in here… follow what they’re doing. If what you’re doing looks nothing like those… chances are you’re doing something quite wrong and dangerous.

4 Likes

How do I get more heat? I have a fixed 60w solder gun. I am not using flux paste but I have flux core solder so it won’t look as shiny
61VxAF5wHwL.AC_SX296_SY426_FMwebp_QL65

Step one:
Don’t use a solder gun. Use a soldering iron.
Something with 65-80+ watts, temperature controlled.
A TS100 is a good choice, or a Pine64 Pinecil, or one of a myriad of chinese irons that take Hakko T12 tips, or an actual Hakko that takes T12 tips, such as a 951.
If you’re really strapped for cash, the Saneryigo SH72 is just about the cheapest possible temperature-controlled iron that still takes integrated heater-tips.

2 Likes

Btw. I wouldn’t have believed this until I actually had it happen to me after a decade of soldering with apparently quite ideal wire.

Some wire sucks fucking dick for reasons I don’t understand even though it looks perfectly fine. Starting out soldering with it under less than ideal conditions (knowing how much heat to use, iron wattage, tip size, flux usage, etc) could be quite discerning, because it just sucks lol.

Wire from Hobbyking has never once let me down. Would recommend sourcing from there instead of Amazon or wherever else when starting out.

2 Likes

I have a boss level spot welder with two 3s lipos in parallel and 8awg wire. I need these max settings to get a weld with 0.2mm nickel where it sticks to the cell after pulling? Does this make sense? @Anubis

You need flux paste. Cored solder simply isn’t enough for these applications unless you seriously know what you’re doing and have a good few years of experience soldering. Even then, you’d just be stupid not to use it.

This is a good starter/works more than well enough for anything you will need it to.

https://www.amazon.com/SRA-Rosin-Paste-Flux-135/dp/B008ZIV85A/ref=mp_s_a_1_3

Can be thinned with isopropyl.

There are some kester liquid formulations that can be sourced fairly cheaply from eBay in nice syringes that are technically a bit better and great depending on the application, can’t remember the exact model numbers you’d be wanting off the top of my head tho. Someone else might know.

5 Likes

The other thing to keep in mind (after you get a proper soldering iron) is to use the correct tip. You want something fat and blunt, for maximum contact and heat transfer. The C4 4mm conical style is common and good for that.


Every tip format will have something like the C4 or D4. These are for the TS100 or SH72, but you’ll see similar naming conventions on T12 Hakko tips as well as others.
Most irons come with something like the B2 as standard, which is fine for small stuff, but for big wires you definitely should get at least one other bigger tip.

2 Likes

As long as you have a fan pulling fumes away/are soldering outside, you really can’t use too much flux. Seriously. Easier to just be liberal in your application of it until you get the hang of how much you really need. Dip your stripped wires in it before tinning. Slather it on your slightly sanded nickel strip, dip your actual iron tip in it every now and then while soldering (along with brass sponging & wetted pad sponge)

If you ever leave a lot of residue behind on a PCB or something it’s good practice to clean it up w/isopropyl and a sponge or q tip or w/e, but most of the electric formulations aren’t exactly corrosive to anything more than the most sensitive of PCB components.

3 Likes

It this ts100 legit?
https://www.amazon.ca/gp/aw/d/B01MDTO6X7/ref=ox_sc_act_image_3?smid=A2FGAWCX62OR7U&psc=1
It comes with b2 and I will get c4 seperately

Can I still make use of the solder gun for anything? Like arduino stuff with 20awg wires?

I can’t think of any reason I’d ever want to use a solder gun when I have an iron and a small assortment of tips. They just don’t work well. I think they’re better suited to like craft jewelry?

2 Likes

Yes, that one will be fine.

I mean I guess, if you want to… But I personally wouldn’t. Once you’ve got the TS100 you probably won’t want to sue anything else, since it’s so much better.
Solder guns like that are mainly used in production environments where the user needs to make hundreds of joints per hour.

It’s like getting a new car and wondering “hmmm, can I still use this old tractor to get groceries?”

1 Like

…and these are some of the welds. I can pull it off with my hand but not easily - is that good enough? How come some of them look so different? It’s the same settings

What welder is that? Gonna have to be a no from my pov.

3 Likes