Search found 69 matches

by BlueSeas
Nov 21 2019 9:07pm
Forum: Battery Technology
Topic: Ebike Shuts Down Under Load or High RPMs Without Load
Replies: 17
Views: 1372

Re: Ebike Shuts Down Under Load or High RPMs Without Load

That's a huge imbalance as others have said. You must either charge low cells to match high cells or discharge high cells to match low cells. To charge low cells, you need a 4.2 V capable charger. Discharging is easier. You can probably use 100-150 feet of 18 gauge wire shorted across high cells unt...
by BlueSeas
Nov 10 2019 9:26pm
Forum: Battery Technology
Topic: Nishi 18650 pack building kit
Replies: 49
Views: 5273

Re: Nishi 18650 pack building kit

I bought Vruzend V2.1 and built a pack in use on a new build. Generally very happy. Been meaning to write a review, but haven't had a chance yet.
by BlueSeas
Oct 29 2019 5:56pm
Forum: E-Bike General Discussion
Topic: 1 kW motor : rear G360, GMAC, 9C RH212, Crystalyte H3540 - or front Grin All Axle ?
Replies: 67
Views: 8646

Re: 1 kW motor : rear G360, GMAC, 9C RH212, Crystalyte H3540 - or front Grin All Axle ?

On the question "what happens on cruise?". The variable regen input (thumb throttle) directly connected to the Phaserunner overrides the throttle input. Regen has priority in the Phaserunner. But since the CA3 without an Ebrake input signal, it doesn't know about the stop. At a full stop on regen al...
by BlueSeas
Oct 23 2019 5:34am
Forum: E-Bike General Discussion
Topic: 1 kW motor : rear G360, GMAC, 9C RH212, Crystalyte H3540 - or front Grin All Axle ?
Replies: 67
Views: 8646

Re: 1 kW motor : rear G360, GMAC, 9C RH212, Crystalyte H3540 - or front Grin All Axle ?

I just built a similar configuration, but using the 9C212. Still setting up the final configurations. Have a half twist throttle on the right, and a thumb controlled variable regen on the left. The thumb regen connects directly to the Phaserunner. The only "mod" required is cutting the green wire on...
by BlueSeas
Oct 18 2019 7:38am
Forum: E-Bike Technical
Topic: Third Button on CA3 Digital AUX
Replies: 1
Views: 273

Re: Third Button on CA3 Digital AUX

For anyone else looking at this question....the answer is the middle button isn't connected to the CA3 interface. There are two hidden wires under the shrink wrap to use it as a SPST momentary switch for anything you can dream up. I ended up with PAS sensitivity on the +/- buttons. And switch the pr...
by BlueSeas
Oct 18 2019 7:32am
Forum: Alternative Energy
Topic: Solar power for Campervan
Replies: 2
Views: 862

Re: Solar power for Campervan

Your linked diagram looks pretty good. Using that an the manuals for each product should deliver a functional system.

Make sure you program the Outback for proper charge voltage based on the specs for the batteries. Consider a fuse or circuit breaker for the feed to the main DC panel.
by BlueSeas
Oct 08 2019 9:51pm
Forum: General Discussion
Topic: Source for bike parts in the USA???
Replies: 3
Views: 570

Re: Source for bike parts in the USA???

The closest I know of is Luna Cycle, but they probably don't have your full list. Just finishing my first conversion, but parts came from many places. The foundation from Ebikes.CA, but other pieces from Amazon, Luna, AliExpress and BikeHubStore.Com. If starting from scratch, I'm not sure you can bu...
by BlueSeas
Oct 08 2019 8:02pm
Forum: Battery Technology
Topic: Best way to reach high voltage with low weight?
Replies: 1
Views: 272

Re: Best way to reach high voltage with low weight?

Take a look at the batteries out of a Ford C-Max or Fusion Energi. Both are plug in hybrids using the same drivetrain. Only good for 20 miles. That's a real number, that allows a reserve for "hybrid" operation. (We own one). It's not exactly what you want. Only 310V and 272 lbs. I think at 1/2 the w...
by BlueSeas
Oct 08 2019 7:26pm
Forum: E-Bike Technical
Topic: Best Variable Regen Input ???
Replies: 8
Views: 546

Re: Best Variable Regen Input ???

I'm on test setup ride #3....but on a Phaserunner/CA3 setup, I'm using a thumb throttle on the left side for variable regen. I like it. Also moved the rear disc brake to the left too. So ala motorcycle, left is rear and right is front. On the Phaserunner it only required cutting one wire on the thro...
by BlueSeas
Oct 08 2019 7:20pm
Forum: E-Bike Technical
Topic: Third Button on CA3 Digital AUX
Replies: 1
Views: 273

Third Button on CA3 Digital AUX

Configuring my first Ebike build. It's a hub motor, Phaserunner, CA3 setup. I have the 3 button digital AUX add on. It's presently configured to switch Presets using the top and bottom button. Is there any way to use the middle button? I want to both switch Presets and adjust PAS sensitivity. Hopefu...
by BlueSeas
Oct 07 2019 4:22pm
Forum: Battery Technology
Topic: Any need to Balance?
Replies: 20
Views: 1066

Re: Any need to Balance?

John in CR... I agree that a human BMS is possible for LFP in 12/24 V traction use. But it needs to be a techie type user. I've only really had one customer I'd trust. The bottom balance was championed by EVTV's host personality and EV builder Jack. For a short range EV home garage conversion of an ...
by BlueSeas
Oct 07 2019 4:06pm
Forum: Battery Technology
Topic: Any need to Balance?
Replies: 20
Views: 1066

Re: Any need to Balance?

Doc,

Thanks for the graph. That's puts the other charts in a better perspective. We will see how it works out.
by BlueSeas
Oct 07 2019 4:02pm
Forum: Battery Technology
Topic: Any need to Balance?
Replies: 20
Views: 1066

Re: Any need to Balance?

John61, Sorry...not really trying to shoot the messenger. I learned the hard way about heat...that first install was my trawler in 2012. They were in use 6 years, 2 with the subsequent owner. No place for a big house bank except in the ER. These were GBS cells, they are a slight chemistry variation....
by BlueSeas
Oct 06 2019 9:27pm
Forum: Battery Technology
Topic: Any need to Balance?
Replies: 20
Views: 1066

Re: Any need to Balance?

oops When you see V drop accelerate below 3.5Vpc, best for longevity to stop discharging. Fine for capacity testing, talking normal usage cycling I understand...but...where is the longevity data? What is the quantified benefit. I never believed the data for Winston/Thundersky/Calb/Sinopoly/GBS/Forz...
by BlueSeas
Oct 06 2019 9:06pm
Forum: Battery Technology
Topic: Any need to Balance?
Replies: 20
Views: 1066

Re: Any need to Balance?

In the future, prior to pack assembly put all cells in parallel for a day or 2 to get the cells in perfect balance to start. I always used to do that for traction LFP banks. Parallel and charge to 3.6V, then assemble bank. With LFP, you must charge. 3.3V at rest is anywhere between 45 to 80% SOC. T...
by BlueSeas
Oct 06 2019 8:47pm
Forum: Battery Technology
Topic: Any need to Balance?
Replies: 20
Views: 1066

Re: Any need to Balance?

Doc,

I see that at about 3.4V there is a noticeable fall off on discharge. Do you have a measure of capacity or total elapsed time for each graph? I'm hoping to see about 3000 mAh.

But it's true....so far all my data is from the spec sheet.

Bob
by BlueSeas
Oct 06 2019 6:25am
Forum: Battery Technology
Topic: Any need to Balance?
Replies: 20
Views: 1066

Re: Any need to Balance?

Right now I'm charging with a 0-120V lab power supply. Regular charges will be using a Grin Cycle Satiator. Not sure what you are suggesting for a capacity tester? Will have data from initial discharges via a Cycle Analyst. That should provide a pretty accurate read on the capacity. I haven't delved...
by BlueSeas
Oct 05 2019 5:58am
Forum: Battery Technology
Topic: Any need to Balance?
Replies: 20
Views: 1066

Re: Any need to Balance?

The peak discharge is designed at 10A per cell, or 40A for the pack. Max charge rate is 1A per cell or 4A. This a charger limitation. I stopped this charge at 4.05V, or roughly 80% charge. The BMS balance is adjustable, using default values of 4.0V to start balancing and .03V difference to trigger s...
by BlueSeas
Oct 04 2019 10:34pm
Forum: Battery Technology
Topic: Any need to Balance?
Replies: 20
Views: 1066

Any need to Balance?

Please see: FAC13ED6-CA43-4268-A0A2-EA08911ECF28.jpeg New 72V 20S 4P pack. 18650GA Panasonic/Sanyo cells. Built with fresh cells. Did not charge to 100%. Anyone see a need to charge to 4.2V and balance? It looks close enough to me. Tested 4 cells from the same lot in a 4 cell charger to 4.2V. No rea...
by BlueSeas
Sep 26 2019 11:45pm
Forum: Battery Technology
Topic: Which BMS for lead acid battery replacement in I.C.E. motorcycle application?
Replies: 3
Views: 349

Re: Which BMS for lead acid battery replacement in I.C.E. motorcycle application?

For a starting battery....the only real function of a battery in a typical ICE vehicle, there is nothing more cost effective than a traditional lead acid battery.

Lithium only worthwhile if the size, weight or exceptional loads enter the equation. Normally they won't.
by BlueSeas
Sep 26 2019 11:37pm
Forum: E-Bike General Discussion
Topic: 60v 30ah brand new battery
Replies: 22
Views: 988

Re: 60v 30ah brand new battery

True. No load = 0 amps. As previously mentioned, most meters are limited to 10A if directly inserted for measurement. Your meter has a spec, probably printed on it somewhere. However, you can add a shunt, and measure load current using voltage. With the proper shunt, up to any practical amps value f...
by BlueSeas
Sep 26 2019 10:20pm
Forum: E-Bike General Discussion
Topic: 60v 30ah brand new battery
Replies: 22
Views: 988

Re: 60v 30ah brand new battery

Voltage isn't directly related to Amp Hours. It can be an indicator or remaining capacity, but that isn't at all an exact science. Generally speaking, you fully charge a battery, then use what's called coulomb counting that monitors amps in/out over time calculating Ah used/added. Then at a defined ...
by BlueSeas
Sep 26 2019 9:14pm
Forum: E-Bike General Discussion
Topic: 60v 30ah brand new battery
Replies: 22
Views: 988

Re: 60v 30ah brand new battery

Lipo does not equal LiFePO4. Two different, but similar chemistries. You used both in your post to refer to your new pack. With LiFePO4, it is much harder to correlate a given voltage to a state of charge. Amps (A) = An instantaneous charge or discharge rate. Watts (W) = Amps * Volts Amp Hours (Ah) ...
by BlueSeas
Sep 19 2019 7:21pm
Forum: Battery Technology
Topic: Making a small pack 5S24P
Replies: 16
Views: 1758

Re: Making a small pack 5S24P

Let's crunch a few round numbers. This isn't intended to be exact. 24P is 24 * 3 Ah for a 72 Ah cell. 150A discharge is slightly greater than 2C discharge rate. Let's look at the battery specs: 8808930F-6C4F-4589-9DAF-FBE1BB81C4FC.jpeg Now I've never seen a chart using "lt", presumably load test. I'...
by BlueSeas
Sep 19 2019 9:46am
Forum: General Discussion
Topic: 100A Contactor Burned on First Try
Replies: 17
Views: 1104

Re: 100A Contactor Burned on First Try

I agree periodic testing is a terrific idea. I sort of see that as the Achilles heel of shrink wrapped and especially potted battery packs without some sort of test function. If you are building your own pack, a switch with a resistor can be placed across the voltage sense wires of one cell to simul...