Search found 2501 matches

by E-HP
Aug 01 2021 11:30am
Forum: EBike Technical
Topic: Lifepo4 36v Battery - did I ruin it?
Replies: 10
Views: 220

Re: Lifepo4 36v Battery - did I ruin it?

No it didn’t. I got it from Crystalyte Europe. It is charged to 34v according to the multimeter. And even if I set min voltage really low on the cycle analyst with another battery, the system still is not fired up with the Lifepo4. How can something read 34v but fail to power the system up or even ...
by E-HP
Jul 31 2021 11:22am
Forum: Bike Mechanical & Structural
Topic: What tool do I need for this?
Replies: 9
Views: 116

Re: What tool do I need for this?

Have you already tried cleaning up the threads and applying some blue Loctite?
by E-HP
Jul 28 2021 9:47pm
Forum: EBike Technical
Topic: Breaking my esc.
Replies: 10
Views: 176

Re: Breaking my esc.

Whats the ancient proverb? Knowledge is power And absolute power.... On the controller, if the assumption is that the potting isn't compromised during impact, then my money is on the electrolytic capacitors, since they are basically a can, with a bunch of thin foil, paper, and some chemicals, that ...
by E-HP
Jul 28 2021 8:56pm
Forum: EBike General Discussion
Topic: Strategies to increase range while on road (you can't use a gas station)
Replies: 38
Views: 932

Re: Strategies to increase range while on road (you can't use a gas station)

Just one 240V outlet, 2 or 3 is nice to have on different circuit breakers. One for the garage heater for up past the 49'th, and one for the welder and one for a charger. You can claim your future proofing for EV charging. :wink: Hmm, I had my main upgraded then added a 100A subpanel in my garage a...
by E-HP
Jul 28 2021 8:33pm
Forum: EBike Technical
Topic: Breaking my esc.
Replies: 10
Views: 176

Re: Breaking my esc.

Its a bit different as the EV metal and surroundings act like a cushion lessening the shock of impact and its not like throwing a potted/epoxied resined pcb board against a wall. But the EV is going much faster so it could be equivalent in some regard as one can only throw so hard and my bet is Hum...
by E-HP
Jul 28 2021 8:06pm
Forum: EBike Technical
Topic: Breaking my esc.
Replies: 10
Views: 176

Re: Breaking my esc.

I appreciate ur feedback but think it’s appropriate being technical. Or maybe we can argue about that for fun. My ego is not effected either way unless you tell me trump won. Well you did say ESC, and practically all EVs on this site have one or more of those, so the more general forum (non-EV spec...
by E-HP
Jul 28 2021 9:52am
Forum: EBike Technical
Topic: Breaking my esc.
Replies: 10
Views: 176

Re: Breaking my esc.

Might be a question to post in "the biker bar/general discussion" subforum. :thumb:
by E-HP
Jul 27 2021 9:02pm
Forum: EBike Technical
Topic: Lifepo4 36v Battery - did I ruin it?
Replies: 10
Views: 220

Re: Lifepo4 36v Battery - did I ruin it?

Will the right charger solve the issue or is the battery trashed? Even if the charger you're using is for a 36V lithium ion pack, it would still have enough voltage to partially charge your pack (42V vs. 43.8V). It may be possible that the pack is really out of balance, but based on your descriptio...
by E-HP
Jul 27 2021 8:44pm
Forum: EBike General Discussion
Topic: Strategies to increase range while on road (you can't use a gas station)
Replies: 38
Views: 932

Re: Strategies to increase range while on road (you can't use a gas station)

Use a 1,000 watt charger and a battery and bms if needed that can take it. As you do not want to pop the breaker. LOL, looks like this thread has taken on a life of its own. I never thought about popping a breaker, since my charger only outputs 5 amps, but when I plugged in my 1500W power supply to...
by E-HP
Jul 27 2021 6:57pm
Forum: EBike Technical
Topic: SWX02 48 to 36v
Replies: 8
Views: 162

Re: SWX02 48 to 36v

If all being equal. Both motors same winding for example 11t. One was 36v and the other 48v which would be better? Would the 36v not be 33% faster in speed and torque? No difference. The motor "voltage" isn't really a rating. In a lot of cases, a motor described at 36V 350W and one descri...
by E-HP
Jul 27 2021 1:49pm
Forum: EBike Technical
Topic: SWX02 48 to 36v
Replies: 8
Views: 162

Re: SWX02 48 to 36v

Hi I appreciate everything you have said and yes you are correct. I have only one hill on my way home. It normally takes 2 minutes tops to get up the hill. I always pedal at the same time. What I wanted to do was buy a 2nd kit minus the battery for my other bike. I only wanted to know if the 36v hu...
by E-HP
Jul 26 2021 9:46pm
Forum: EBike Technical
Topic: Front Hub DD motor identification.
Replies: 10
Views: 198

Re: Front Hub DD motor identification.

If you run a front hub, will that suspension design tend to lower the front end during acceleration? Not that it's good or bad, I just haven't seen a project using a front hub motor using that style springer fork before.
by E-HP
Jul 26 2021 6:53pm
Forum: EBike Troubleshooting
Topic: Hub motor stops and go under high load
Replies: 8
Views: 188

Re: Hub motor stops and go under high load

I'd check your phase wire connectors to make sure none are loose.
by E-HP
Jul 25 2021 11:19am
Forum: EBike Technical
Topic: Noob Question re BMS
Replies: 60
Views: 947

Re: Noob Question re BMS

Let's all hope that's the end of it :thumb:
by E-HP
Jul 24 2021 12:38pm
Forum: EBike Technical
Topic: Noob Question re BMS
Replies: 60
Views: 947

Re: Noob Question re BMS

I'm sorry, did I miss the OP reporting actual fires? "Made another pack and it ran for a a very short bit and quit, (BMS) shut it, after this bunch screwed me and had a small fire with first batch." "...I tend to do decent work but am scared of these cells, after one fire and so on ....
by E-HP
Jul 24 2021 11:44am
Forum: EBike Technical
Topic: Noob Question re BMS
Replies: 60
Views: 947

Re: Noob Question re BMS

john61ct wrote:
Jul 24 2021 11:31am
44V is WAY too high, dangerous.

And you are telling us 6 - 7V ??

That really needs to get cleared up, top priority
I think the fires :flame: are a good indicator that there's at least a few bad assumptions being made. :shock:
by E-HP
Jul 24 2021 11:12am
Forum: EBike Technical
Topic: Noob Question re BMS
Replies: 60
Views: 947

Re: Noob Question re BMS

HK12K wrote:
Jul 24 2021 10:36am
Assuming he was accurate, of course.

Pics would definitely clarify things though.
I would say most people know what a 30Q or 18650 battery looks like, but I'm not getting the impression that is true in this case, so seeing is believing, since the words are obviously creating confusion.
by E-HP
Jul 24 2021 11:05am
Forum: EBike General Discussion
Topic: SMPS for charging circuit readings wrong?
Replies: 6
Views: 143

Re: SMPS for charging circuit readings wrong?

i thought only motors, capcitors, affect power factor, i thought SMPS's and fancy silicon is exempt. I guess you should reconsider some of the reasons that you've already eliminated? The efficiency of a power supply is based on real power in vs real power out. By using the AC voltage and measured A...
by E-HP
Jul 24 2021 10:21am
Forum: EBike Technical
Topic: Noob Question re BMS
Replies: 60
Views: 947

Re: Noob Question re BMS

At this point at noon will recheck voltage on cells and if all are 6-7.1 will assemble in NESE modules, connect the BMS and ride. Please provide a picture of these cells and how you are measuring them at 6.-7.1 with your meter, so people don't waste their time guessing what you are talking about. N...
by E-HP
Jul 23 2021 11:21pm
Forum: EBike General Discussion
Topic: SMPS for charging circuit readings wrong?
Replies: 6
Views: 143

Re: SMPS for charging circuit readings wrong?

bike4life wrote:
Jul 23 2021 11:04pm
they are =
Only for a pure resistive load. The AC is providing power to the power supply, which is not a resistive load, therefore you have to take into account the power factor. Only a pure resistive load will have a power factor of unity.
by E-HP
Jul 23 2021 9:57pm
Forum: EBike General Discussion
Topic: New build: looking for setup without an LCD display required
Replies: 11
Views: 253

Re: New build: looking for setup without an LCD display required

"My biggest question is: is there a setup that that doesn't require an LCD display? maybe PAS at a later point. " If you're adding PAS, then without a display, you may only have one PAS level, which usually isn't as usable than adjustable PAS levels. If not, or if you live with one level,...
by E-HP
Jul 23 2021 8:38pm
Forum: EBike General Discussion
Topic: SMPS for charging circuit readings wrong?
Replies: 6
Views: 143

Re: SMPS for charging circuit readings wrong?

bike4life wrote:
Jul 23 2021 1:51pm


I am measuring 12 amps on the input and 27 amps on the output.

12 x 120 = 1440w.

36 x 27 = 1000w

roughly 70% efficient i guess. 1000/1440 = 70%
12 x 120 = 1440 VA, not watts.
by E-HP
Jul 23 2021 7:50pm
Forum: Bike Mechanical & Structural
Topic: Increasing the Gearing on a cheap 7 speed ebike Samebike LO26
Replies: 17
Views: 294

Re: Increasing the Gearing on a cheap 7 speed ebike Samebike LO26

Luna (probably others) has a 30 tooth front ring for the BBSHD. This will lower the ratio considerably and with a 28T or 34T rear should provide a low enough gear. I've had one on my BBS02 equipped hardtail for years and it has functioned perfectly. Looking at how the 30 tooth mounts on the BBSHD, ...
by E-HP
Jul 23 2021 7:46pm
Forum: EBike General Discussion
Topic: how fast does 1600 watts get you on a mountainbike?
Replies: 13
Views: 341

Re: how fast does 1600 watts get you on a mountainbike?

I'm guessing approximately 35.6mph, assuming flat ground, no head wind, motor winding combined with battery voltage that is capable of speeds higher than, and an upright riding position on the MTB.
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by E-HP
Jul 22 2021 11:26pm
Forum: EBike Technical
Topic: Noob Question re BMS
Replies: 60
Views: 947

Re: Noob Question re BMS

bobbill wrote:
Jul 20 2021 4:47am
I have some 30 cells. Cells vary in voltage from 6.1v to 6.9v
What kind of cells?