Search found 1437 matches

by ebike11
Sep 19 2020 1:35pm
Forum: Battery Technology
Topic: bluetooth BMS?
Replies: 1527
Views: 192968

Re: bluetooth BMS?

Hi all! I have the 300A 24S model but currently using only 18S. Its all connected fine but when one cell reaches the max. cell voltage limit whichbi set at 4.2 then the bms shunts off the charger. Most of the other cells are around 4.05 to 4.1. How can I get all the other cells to increase in voltag...
by ebike11
Sep 10 2020 8:08pm
Forum: E-Bike Reviews & Testing
Topic: Cycle Analyst V3 preview and first beta release
Replies: 4594
Views: 840263

Re: Cycle Analyst V3 preview and first beta release

Hi guys! Im hoping someone can answer this. I previously had an external 1mohm Grin shunt before getting a larger one since I am running more power now. I am using a Sabvoton controller set at max. current 200A. The new shunt is rated at 200A and is 75mV. My current numbers on the CA3 were incorrect...
by ebike11
Sep 06 2020 10:31pm
Forum: Battery Technology
Topic: An odd bms reading
Replies: 2
Views: 68

Re: An odd bms reading

Balmorhea wrote:
Sep 06 2020 4:46am
The BMS does not enable the main power circuit unless the sense wires are connected and the cell values are within spec. You can sometimes read an arbitrary voltage on the power leads when they’re cut off, but there’s no power there.

Hi! Oh thats very interesting
by ebike11
Sep 06 2020 4:14am
Forum: Battery Technology
Topic: An odd bms reading
Replies: 2
Views: 68

An odd bms reading

Hi everyone! Im installing my first bluetooth bms unit to my 18s lipo pack. The bms can be used up to 24s. At the moment I just finished the main leads and connectors for the unit itself. I will wire up and connect the individual cells/turn on wires etc. to it soon. At the moment the bms is practica...
by ebike11
Aug 14 2020 12:21pm
Forum: Battery Technology
Topic: Is this possible to get over 100v?
Replies: 18
Views: 464

Re: Is this possible to get over 100v?

100 what? %? A? It may depend on the controller, but I guess 100% is full speed. When you go over 100% you go in to field weakening. Sorry..i meant when you go into the Sabvoton controller phone app..you can see field weakening and it is set at "0" from the factory but can be increased up to 100 an...
by ebike11
Aug 14 2020 9:39am
Forum: Battery Technology
Topic: Is this possible to get over 100v?
Replies: 18
Views: 464

Re: Is this possible to get over 100v?

For more speed you can use field weakening or/and higher gearing. For more power go more A or more V (and gear down if you need more torque) More volt will give more power (but only at higher rpm than the peak are now) and higher rpm. Higher voltage will give more power and a wider power band. Has ...
by ebike11
Aug 14 2020 5:19am
Forum: Battery Technology
Topic: Is this possible to get over 100v?
Replies: 18
Views: 464

Re: Is this possible to get over 100v?

Hmmm so if the 4S pack had its own bms and the 20S already has its own bms...i would still need to make sure the both bms units can handle 100V ? Yes With parallel not, but serial all the current, at that pack level voltage, flows through each cell/group. Such an expensive BMS required, you only wa...
by ebike11
Aug 14 2020 12:16am
Forum: Battery Technology
Topic: Is this possible to get over 100v?
Replies: 18
Views: 464

Re: Is this possible to get over 100v?

wineboyrider wrote:
Aug 13 2020 8:36pm
Get an identical pack and go 40s!
Id love to but not happenin
by ebike11
Aug 13 2020 8:48am
Forum: Battery Technology
Topic: Is this possible to get over 100v?
Replies: 18
Views: 464

Re: Is this possible to get over 100v?

It would probably work, if the bms can handle the extra voltage. 24s seems to be the wrong way to go from what I understand. Too high for most controllers (with 100v components), and unnecessary low for most higher voltage controllers. . Hi thanks Hmmm so if the 4S pack had its own bms and the 20S ...
by ebike11
Aug 12 2020 12:31pm
Forum: Battery Technology
Topic: Is this possible to get over 100v?
Replies: 18
Views: 464

Re: Is this possible to get over 100v?

Add 4S in series as a second pack. When charging, charge it separately with an RC charger...just a thought. I was just thinking like this. Wouldnt it be the easiest way? I dont want to tear apart my 20s pack or weld more cells together.. I dont mind having 2 different chargers for 2 packs. 4s10p on...
by ebike11
Aug 12 2020 3:22am
Forum: Battery Technology
Topic: Is this possible to get over 100v?
Replies: 18
Views: 464

Re: Is this possible to get over 100v?

Possible but not as straightforward as parallel sub-packs. Personally I'd just get the pack made that you want in the first place. Modular 7S or 8S subpacks would make more sense, easy to use cheap hobby gear for charging and maintenance Then get a 28S BMS for per-cell LVD functions only, 4 subpack...
by ebike11
Aug 12 2020 12:07am
Forum: Battery Technology
Topic: Is this possible to get over 100v?
Replies: 18
Views: 464

Is this possible to get over 100v?

Hi guys I have an em3ev 20s10p samsung 25r pack with only 10 cycles on it I bought it recently. However id like more voltage and there is a local seller of 25R cells here that builds packs Could I simply add 4S or 6S to the 20S since the cells are pretty much new? Is 4S10P or 6S10P possible? The 2 p...
by ebike11
Aug 10 2020 9:08am
Forum: E-Bike General Discussion
Topic: Has anyone purchased this QS205 side cover? $250
Replies: 4
Views: 149

Re: Has anyone purchased this QS205 side cover? $250

If you overheat a QS 205H50v3, it is because you had built too heavy and/or riding it inefficient. A new cover won’t change much to that. It is like a plaster patch on a weak masonry wall. Avoid building a 65 mph bike if you are gonna ride it 25. Avoid building motorcycle weight using an in-wheel m...
by ebike11
Aug 10 2020 4:23am
Forum: E-Bike General Discussion
Topic: Has anyone purchased this QS205 side cover? $250
Replies: 4
Views: 149

Has anyone purchased this QS205 side cover? $250

not sure if its been posted here
https://turbinators.com/produkt/qs205-v ... heel-side/
quite an expensive upgrade, not sure if its worth it.
Thoughts??
by ebike11
Aug 02 2020 7:07pm
Forum: E-Bike General Discussion
Topic: Shunt comparison pics
Replies: 6
Views: 229

Re: Shunt comparison pics

Oh I see. So the "bodies" of the shunt makes no difference? Pretty much. The additional contribution to the resistance from the lug sections should be minimal, when comparing the large cross sectional area of the chunky body parts relative to the very small cross section of the thin shunts. Thanks ...
by ebike11
Aug 02 2020 4:23pm
Forum: E-Bike General Discussion
Topic: Shunt comparison pics
Replies: 6
Views: 229

Re: Shunt comparison pics

The shunt(s) are the black part(s) in you pics. Looking at your second and third pics, the 200A shunts are wider than the 150A, in order to pass more current. Oh I see. So the "bodies" of the shunt makes no difference? Pretty much. The additional contribution to the resistance from the lug sections...
by ebike11
Aug 01 2020 1:04pm
Forum: E-Bike General Discussion
Topic: Shunt comparison pics
Replies: 6
Views: 229

Re: Shunt comparison pics

E-HP wrote:
Aug 01 2020 12:39pm
The shunt(s) are the black part(s) in you pics. Looking at your second and third pics, the 200A shunts are wider than the 150A, in order to pass more current.
Oh I see. So the "bodies" of the shunt makes no difference?
by ebike11
Aug 01 2020 12:18pm
Forum: E-Bike General Discussion
Topic: Shunt comparison pics
Replies: 6
Views: 229

Shunt comparison pics

Hi guys..i know it may not be a big deal. Plan on removing my grin shunt for one that can handle more power.
First ordered a 150A then thought to go for a 200A.
They are cheap so not expecting anything fancy but its weird that the 150A one is so much bigger and heavier.
by ebike11
Jul 22 2020 8:07am
Forum: Battery Technology
Topic: Anyone using or have used these hobby king packs?
Replies: 0
Views: 295

Anyone using or have used these hobby king packs?

https://hobbyking.com/en_us/turnigy-high-capacity-battery-20000mah-6s-12c-drone-lipo-pack-xt90.html?queryID=73d1a9cad23998b16d72066e5606a6fd&objectID=78412&indexName=hbk_live_magento_en_us_products these are 20Ah but wondering how they perform and if they are in the same performance category as the ...
by ebike11
Jul 20 2020 7:47am
Forum: E-Bike General Discussion
Topic: QS205..what limits are u pushing?
Replies: 0
Views: 266

QS205..what limits are u pushing?

Regarding the flux weakening setting? Are most of you setting it fairly high? Anyone ever set it at 100% and if so is that safe for the motor or should it be set more conservative? After u set the flux option..is there any other settings that should be adjusted along with that specific change? Im ru...
by ebike11
Jul 20 2020 3:53am
Forum: E-Bike General Discussion
Topic: Do I need I need to wrap this?
Replies: 8
Views: 332

Re: DobI need I need to wrap this?

An innter tube, wrapped a few times around, zip ties and gorilla duct tape for good measure, then thick heat sink which should be easily available on ebay, though my local electronic supply store has thick heatshrink in up to 2" diameter maybe even 3" diameter, 1:3 shrinkage. Do u mean shrink wrap ...
by ebike11
Jul 19 2020 7:41pm
Forum: E-Bike General Discussion
Topic: Do I need I need to wrap this?
Replies: 8
Views: 332

Do I need I need to wrap this?

Hi guys..i plan on using this shunt to replace my grin one. I attached a pic. The problem is this shunt is exposed and has no insulation to avoid it possibly touching something that its not supposed to. I will be just putting it loosely inside the EEB frame with all the other wiring. Would wraping i...
by ebike11
Jul 19 2020 5:23pm
Forum: E-Bike General Discussion
Topic: Another Stealth bomber (clone) build
Replies: 289
Views: 46795

Re: Another Stealth bomber (clone) build

shortcircuit911 wrote:
Jun 21 2020 11:51pm
EEB+QS120 test ride video: https://www.youtube.com/watch?v=1RaA5pf ... e=youtu.be
Wow thats a giagantic sprocket!
Just curious...why wouldnt you just use a powerful hub motor?
by ebike11
Jul 18 2020 6:30am
Forum: E-Bike Technical
Topic: BMS wiring seems a bit tricky
Replies: 5
Views: 405

Re: BMS wiring seems a bit tricky

Looking at your picture (as the link doesn't work) Neg of the 3 cell pack is your 1st wire on the bms followed by your 3 pos wires on the same jst. Next are the 5 pos wires on the jst to the left (Skip the Neg) Again next are the 5 pos wires on the jst to the left (Skip the Neg) Again next are the ...