Search found 376 matches

by ClintBX
Jun 26 2022 4:25am
Forum: EBike Troubleshooting
Topic: Did I just fry my throttle?
Replies: 5
Views: 86

Did I just fry my throttle?

Hi ESFMs, I recently had to replace my twist throttle after an incident on an escalator destroying my last throttle. The new throttle is a twist throttle with 3 speed wires and a voltage display wire. Ever since I've had it, I've noticed that it would display less voltage than normal. 54.1v instead ...
by ClintBX
Jan 07 2022 3:37am
Forum: EBike General Discussion
Topic: What are your thoughts on old man mountain racks?
Replies: 0
Views: 460

What are your thoughts on old man mountain racks?

Hi ESFMs, I'm in the process of restoring and rebuilding a bike with an especially large front suspension fork. I plan to have a front rack on it but because it's a still fork with a welded on arch, I know I can't put on a brake mount and eyelet mount style rack. When I do that, either the arch star...
by ClintBX
Jul 14 2021 2:58am
Forum: EBike General Discussion
Topic: Can you recommend me a genuine 18650 vendor?
Replies: 0
Views: 307

Can you recommend me a genuine 18650 vendor?

Hi ESFMs, I'm about to build my first pack using the vruzend v2 kit. I'm going for a 13S3P using preferably 3500mAh 10A 18650 cells. I'm looking around for reputible vendors at the best price possible. I've been looking on AliExpress, eBay and Amazon but knowing that there are a lot of fakes out the...
by ClintBX
Jul 13 2021 8:37am
Forum: EBike General Discussion
Topic: Can you recommend me a genuine 18650 vendor?
Replies: 0
Views: 175

Can you recommend me a genuine 18650 vendor?

Hi ESFMs, I'm about to build my first pack using the vruzend v2 kit. I'm going for a 13S3P using preferably 3500mAh 10A 18650 cells. I'm looking around for reputible vendors at the best price possible. I've been looking on AliExpress, eBay and Amazon but knowing that there are a lot of fakes out the...
by ClintBX
Jul 13 2021 3:59am
Forum: EBike Technical
Topic: who can I trust to buy legit 18650 cells at an affordable price?
Replies: 0
Views: 205

who can I trust to buy legit 18650 cells at an affordable price?

Hi ESFMs, I'm about to build my first battery pack using the vruzend v2 kit. I want to build a 13S3P using 3500mAh cells with a discharge reading of 10A. I'm looking around on eBay, AliExpress and Amazon and theres a lot of options. The most affordable ones are on AliExpress but I'm also aware that ...
by ClintBX
Jan 28 2021 9:37am
Forum: EBike Technical
Topic: How to I balance charge a 13s with only a 6s balance charger?
Replies: 30
Views: 1112

Re: How to I balance charge a 13s with only a 6s balance charger?

Voltron wrote:
Jan 28 2021 9:29am
JST? (Japan solderless terminal)
There are 3 types apparently. TP (thunder power), XH and hyperions. I think I might have TP but I'm not sure if they're 1mm or 2mm. I'm gonna have to order online an assortment. I can never get the right parts from my local stores in my neck of the woods.
by ClintBX
Jan 28 2021 3:38am
Forum: EBike Technical
Topic: How to I balance charge a 13s with only a 6s balance charger?
Replies: 30
Views: 1112

Re: How to I balance charge a 13s with only a 6s balance charger?

What's the name of this type of connector exactly? Is this a TP connector? My local electronics stores don't have these.
by ClintBX
Jan 28 2021 3:07am
Forum: EBike Technical
Topic: How to I balance charge a 13s with only a 6s balance charger?
Replies: 30
Views: 1112

Re: How to I balance charge a 13s with only a 6s balance charger?

I already asked you that Does that charger allow charging without the balance plug? We are not taking the time to write just for fun. If you don't know how to find out something so basic I really think you should not be messing about on this path by yourself. Find someone local to you to help might...
by ClintBX
Jan 27 2021 1:38pm
Forum: EBike Technical
Topic: How to I balance charge a 13s with only a 6s balance charger?
Replies: 30
Views: 1112

Re: How to I balance charge a 13s with only a 6s balance charger?

How do I know when it's charging? I identified the one series that's lower than the rest and I got a couple pieces of thin wire. I've confirmed that they're making contact through my multimeter. I've selected lipo setting and charge on 1s but this charger isn't giving me any indication that's is cha...
by ClintBX
Jan 27 2021 2:50am
Forum: EBike Technical
Topic: How to I balance charge a 13s with only a 6s balance charger?
Replies: 30
Views: 1112

Re: How to I balance charge a 13s with only a 6s balance charger?

Now just make 2 probes that will fit in the holes in the balance plug (don't force anything too big in them and bend the terminals inside the plug, like a paperclip is usually too big, I've used thin solid strand insulated wire or tiny male jst 2 pin plug, but had to trim plastic off the body and t...
by ClintBX
Jan 26 2021 1:43pm
Forum: EBike Technical
Topic: How to I balance charge a 13s with only a 6s balance charger?
Replies: 30
Views: 1112

Re: How to I balance charge a 13s with only a 6s balance charger?

Voltron wrote:
Jan 25 2021 3:48pm
Are you to where you have the balance wire plug exposed like this?
IMG_20200210_210612884.jpg
Yes.
by ClintBX
Jan 25 2021 2:46pm
Forum: EBike Technical
Topic: How to I balance charge a 13s with only a 6s balance charger?
Replies: 30
Views: 1112

Re: How to I balance charge a 13s with only a 6s balance charger?

I'm still trying to figure out how I'll be hooking up my balance charger to my 13s pack. All the tutorials show that you have to connect the output plugs into the charge/discharge leads of the pack but when I do that, I get an error message "connection break". I'm assuming that its because...
by ClintBX
Jan 25 2021 5:58am
Forum: EBike Technical
Topic: How to I balance charge a 13s with only a 6s balance charger?
Replies: 30
Views: 1112

Re: How to I balance charge a 13s with only a 6s balance charger?

john61ct wrote:
Jan 24 2021 3:48pm
FYI, a string means cells in series.

A group for in parallel.

So, just one group may be out of balance.
So, the singular form of series in this case is string? I've always felt awkward referring to one series as "series"
by ClintBX
Jan 24 2021 2:14pm
Forum: EBike Technical
Topic: How to I balance charge a 13s with only a 6s balance charger?
Replies: 30
Views: 1112

Re: How to I balance charge a 13s with only a 6s balance charger?

Well, chances are that it's probably just one series out of balance. I know that for sure on one pack. The other 2 I haven't checked yet.

I might find a 2 pin jst connector and work it that way.

Thanks guys. I'll keep y'all posted on my progress.
by ClintBX
Jan 23 2021 4:12pm
Forum: EBike Technical
Topic: How to I balance charge a 13s with only a 6s balance charger?
Replies: 30
Views: 1112

Re: How to I balance charge a 13s with only a 6s balance charger?

Can I use my 6s balance charger on my 13s pack? And can I charge it through the bms port? I'm thinking if I can get the 14 pin jst linked up to two 6 pin connectors and just rotate them? Would it work that easily? Id it safe to do it that way? I'm very new to this
by ClintBX
Jan 23 2021 3:03am
Forum: EBike Technical
Topic: How to I balance charge a 13s with only a 6s balance charger?
Replies: 30
Views: 1112

How to I balance charge a 13s with only a 6s balance charger?

Hi ESFMs I have a few batteries that are no longer charging fully. Some of them are quite new but have a cheap bms installed. Rather than throw out perfectly good packs, I want to learn to balance them (and maybe replaced their bms with good quality ones at some stage) I bought one of those iMax bal...
by ClintBX
Dec 29 2020 2:28am
Forum: EBike Reviews & Testing
Topic: What the heck is wrong with UPP packs!?
Replies: 66
Views: 5504

Re: What the heck is wrong with UPP packs!?

A quick update on my experience. The vendor for one of the packs sent me a replacement. This was the pack that started sparking up and burning a hole through its bag. I've been riding with it for only 20 days and already, it just started to not get a full charge. It stops charging at 53v, whereas it...
by ClintBX
Nov 18 2020 6:15am
Forum: EBike Technical
Topic: What are some typical symptoms of a gearless DD hub motor failing?
Replies: 0
Views: 187

What are some typical symptoms of a gearless DD hub motor failing?

Hi ESFMs, Over the past few years I've gotten familiar with some of the major types of bike failure that can happen. I know how a blown fet in a controller shows up, I know what phase wire issues feel like and I know all about the dreaded Phantom throttle syndrome. What I haven't had the misfortune ...
by ClintBX
Nov 14 2020 4:25am
Forum: EBike Reviews & Testing
Topic: What the heck is wrong with UPP packs!?
Replies: 66
Views: 5504

Re: What the heck is wrong with UPP packs!?

I have a question about the UPP's BMS compatibility with my controller/motor setup. The BMS in these 14Ah packs are rated at 30A continuous and 90A peak. My controller is rated at 17A continuous and 35A peak. And my motor is 500 watts. I don't know what that means in terms of how many amps it can ta...
by ClintBX
Nov 10 2020 11:13am
Forum: EBike Reviews & Testing
Topic: What the heck is wrong with UPP packs!?
Replies: 66
Views: 5504

Re: What the heck is wrong with UPP packs!?

goatman wrote:
Nov 09 2020 9:20pm
looks like you get to try and salvage some cells and make a new pack. i use cell holders and plasti-dip to waterproof
I like that idea. How do you recommend I should approach the dismantling process? How do I break the spot welds?
by ClintBX
Nov 09 2020 5:05pm
Forum: EBike Reviews & Testing
Topic: What the heck is wrong with UPP packs!?
Replies: 66
Views: 5504

Re: What the heck is wrong with UPP packs!?

Those are the power FETs. It looks like you are putting a higher continuous load on the BMS than the FETs can handle without overheating. Sometime you can add a heat sink to resolve that but the better resolution is to use a higher power BMS. What amperage is the pack rated at? I was wondering abou...
by ClintBX
Nov 09 2020 1:03pm
Forum: EBike Reviews & Testing
Topic: What the heck is wrong with UPP packs!?
Replies: 66
Views: 5504

Re: What the heck is wrong with UPP packs!?

And on the top side of the bms, I noticed 5 modules with the first 3 looking singed at the back. What are those things? This is my first bms autopsy.
by ClintBX
Nov 09 2020 12:57pm
Forum: EBike Reviews & Testing
Topic: What the heck is wrong with UPP packs!?
Replies: 66
Views: 5504

Re: What the heck is wrong with UPP packs!?

The autopsy continues. Here a shot the bms that didn't burn. Well I guess it did.
by ClintBX
Nov 09 2020 12:38pm
Forum: EBike Reviews & Testing
Topic: What the heck is wrong with UPP packs!?
Replies: 66
Views: 5504

Re: What the heck is wrong with UPP packs!?

Here's a shot of the "new" pack after I ripped open the packaging.

I suspect that the cardboard insulator used acts as a sponge and only serves to spread any moisture that happens to get in. I prefer it when they use the hard plastic like insulator.
by ClintBX
Nov 09 2020 12:33pm
Forum: EBike Reviews & Testing
Topic: What the heck is wrong with UPP packs!?
Replies: 66
Views: 5504

Re: What the heck is wrong with UPP packs!?

Here are some pics of the 10 month old pack. I checked each series' voltage. There all around 4.1v except for that first one by the court wire bodging. It is on 0.33v

The month old pack is around 3.6v with the first series at 1.36v