Search found 1654 matches

by ElectricGod
Apr 15, 2018 9:28 pm
Forum: E-Scooter and Motorcycle General Discussion
Topic: R Martin EVD Moped with HubMonster
Replies: 71
Views: 3192

Re: R Martin EVD Moped with HubMonster

It's been a while...I'm in the middle of moving right now...can't do any building right now.
by ElectricGod
Apr 14, 2018 8:17 pm
Forum: Battery Technology
Topic: LTO Lithium Titanium Oxide (Titanate) Battery 30S - Seeking the Ultimate Commuter Battery
Replies: 103
Views: 4481

Re: LTO Lithium Titanium Oxide (Titanate) Battery 30S - Seeking the Ultimate Commuter Battery

I'll be building an LTO pack soon. I intend to go to 131 volts or 48S. I currently have 24 LTO cells and have worked out how to connect together the tabs as cheaply and reliably as possible. My solution is to bolt together the tabs with brass M6 screws, washers and nuts. I can solder directly to th...
by ElectricGod
Apr 14, 2018 2:09 pm
Forum: Battery Technology
Topic: bluetooth BMS?
Replies: 401
Views: 15421

Re: 32S, 300 amp, BT, LCD BMS

Can I swap all the 100V HY045N10 fets for AOT2500? You have the 24s <100V BMS, right? so it would be really stupid to swap them out for AOT2500 which have more than twice the resistance. The HY's are not bad. Almost as good as the widley used IRF4110 in terms of Rds on :wink: How do I check if the ...
by ElectricGod
Apr 11, 2018 6:55 pm
Forum: Battery Technology
Topic: bluetooth BMS?
Replies: 401
Views: 15421

Re: bluetooth BMS?

These are decent BMS. I would not be afraid to buy more of them.

Image
by ElectricGod
Apr 11, 2018 6:52 pm
Forum: Battery Technology
Topic: LTO Lithium Titanium Oxide (Titanate) Battery 30S - Seeking the Ultimate Commuter Battery
Replies: 103
Views: 4481

Re: LTO Lithium Titanium Oxide (Titanate) Battery 30S - Seeking the Ultimate Commuter Battery

Educated...LOL...no not really. I did go to school for an EE in the late 80's, but otherwise any "education" I have is becasue I read about subjects that I want to know about. Anyone can do what I have done...if they stick to it. I remember not so long ago having no idea how mosfets work or how to ...
by ElectricGod
Apr 11, 2018 2:57 pm
Forum: Battery Technology
Topic: LTO Lithium Titanium Oxide (Titanate) Battery 30S - Seeking the Ultimate Commuter Battery
Replies: 103
Views: 4481

Re: LTO Lithium Titanium Oxide (Titanate) Battery 30S - Seeking the Ultimate Commuter Battery

What I was worried about was continuous charging from the alternator. The voltage issue isn't really an issue as my truck is pretty much dead on 14.4-14.5 all the time so 6s should cover it nicely with margin. There is probably something else in the circuit that makes it not an issue that I'm not t...
by ElectricGod
Apr 11, 2018 12:30 pm
Forum: Battery Technology
Topic: LTO Lithium Titanium Oxide (Titanate) Battery 30S - Seeking the Ultimate Commuter Battery
Replies: 103
Views: 4481

Re: LTO Lithium Titanium Oxide (Titanate) Battery 30S - Seeking the Ultimate Commuter Battery

What I was worried about was continuous charging from the alternator. The voltage issue isn't really an issue as my truck is pretty much dead on 14.4-14.5 all the time so 6s should cover it nicely with margin. There is probably something else in the circuit that makes it not an issue that I'm not t...
by ElectricGod
Apr 11, 2018 11:49 am
Forum: Battery Technology
Topic: LTO Lithium Titanium Oxide (Titanate) Battery 30S - Seeking the Ultimate Commuter Battery
Replies: 103
Views: 4481

Re: LTO Lithium Titanium Oxide (Titanate) Battery 30S - Seeking the Ultimate Commuter Battery

Not I. :D They were installed in an engine compartment for a two month test. Wasn't driven over an hour. After return from a short vacation they were dead and swollen. Must have been enough draw to kill 22ah. After that, I don't know the story. Whether swollen during charge or what. Doubt if it was...
by ElectricGod
Apr 11, 2018 11:30 am
Forum: Battery Technology
Topic: bluetooth BMS?
Replies: 401
Views: 15421

Re: bluetooth BMS?

Hey Circuit... I have an idea for you. Your BMS is an all in one device. How about split out the power mosfets to a separate board and then make the balancing and monitoring boards stack-able. This allows your product to reach a far broader market (people like me!!!) where 16S is flat out a show st...
by ElectricGod
Apr 11, 2018 11:10 am
Forum: Battery Technology
Topic: bluetooth BMS?
Replies: 401
Views: 15421

Re: bluetooth BMS?

I noticed that too. My BMS turns off if it's just hooked up but not actively charging or discharging regularly. I had intended to mess with settings to get this behavior to either stop or extend beyond the 1 or 2 days I see right now. BTW...0 typically means off. If you are wanting week long on per...
by ElectricGod
Apr 11, 2018 1:35 am
Forum: Battery Technology
Topic: LTO Lithium Titanium Oxide (Titanate) Battery 30S - Seeking the Ultimate Commuter Battery
Replies: 103
Views: 4481

Re: LTO Lithium Titanium Oxide (Titanate) Battery 30S - Seeking the Ultimate Commuter Battery

Inwo wrote:
Apr 10, 2018 3:31 pm
Don't forget that pouches need to be contained with pressure plates.

swelledsmall.png

Did you do that? They look seriously over charged to get the cells to swell up like that.
by ElectricGod
Apr 10, 2018 11:19 am
Forum: Battery Technology
Topic: LTO Lithium Titanium Oxide (Titanate) Battery 30S - Seeking the Ultimate Commuter Battery
Replies: 103
Views: 4481

Re: LTO Lithium Titanium Oxide (Titanate) Battery 30S - Seeking the Ultimate Commuter Battery

I'll be building an LTO pack soon. I intend to go to 131 volts or 48S. I currently have 24 LTO cells and have worked out how to connect together the tabs as cheaply and reliably as possible. My solution is to bolt together the tabs with brass M6 screws, washers and nuts. I can solder directly to the...
by ElectricGod
Apr 10, 2018 10:35 am
Forum: Battery Technology
Topic: bluetooth BMS?
Replies: 401
Views: 15421

Re: bluetooth BMS?

That's my current solution...super cap boards. I just received a couple of them today not realizing that what I had ordered didn't actually have board space dedicated for mounting the caps. It has balance leads. So there is likely not much point, at least right now, in trying to get custom ones mad...
by ElectricGod
Apr 10, 2018 10:33 am
Forum: Battery Technology
Topic: bluetooth BMS?
Replies: 401
Views: 15421

Re: bluetooth BMS?

Slighty more ontopic: If you want to keep the bms from cutting out the bluetooth you can, The bluetooth dies when there is no current flow. On itself that is fine for most people but i would like to see the bms settings when it is done charging the next morning without having to turn on the control...
by ElectricGod
Apr 09, 2018 11:56 pm
Forum: Battery Technology
Topic: bluetooth BMS?
Replies: 401
Views: 15421

Re: bluetooth BMS?

if you can get them basically free it is a nice fun project. but lifespan is not really much of an arguement if a properly sized pack of 18650's and 4.05v top charge will last you several thousands of cycles and is half the size and a fraction of the weight i dont see the advantage in a mobile solu...
by ElectricGod
Apr 09, 2018 11:33 pm
Forum: Battery Technology
Topic: bluetooth BMS?
Replies: 401
Views: 15421

Re: bluetooth BMS?

i think you can get bestech to make a LFP series if you ask nicely. you can either sell them with a balance board or use them yourself but if you get 200 you can probably get your own custom ones made. Perhaps a group buy for LTO balance boards? It may not be necessary though if the SuperCap boards...
by ElectricGod
Apr 09, 2018 1:58 pm
Forum: Battery Technology
Topic: bluetooth BMS?
Replies: 401
Views: 15421

Re: bluetooth BMS?

basically with a 12V LFP battery you only need a balance board, not a full blown BMS of your cells are identical and from the same batch. just get these: http://bestechpower.com/balanceboard/HCX-D162.html Flippy... Do you know how to set these modules? I've looked at them in the past and wanted to ...
by ElectricGod
Apr 06, 2018 1:51 pm
Forum: Battery Technology
Topic: bluetooth BMS?
Replies: 401
Views: 15421

Re: bluetooth BMS?

basically with a 12V LFP battery you only need a balance board, not a full blown BMS of your cells are identical and from the same batch. just get these: http://bestechpower.com/balanceboard/HCX-D162.html Flippy... Do you know how to set these modules? I've looked at them in the past and wanted to ...
by ElectricGod
Apr 06, 2018 1:47 pm
Forum: Battery Technology
Topic: bluetooth BMS?
Replies: 401
Views: 15421

Re: bluetooth BMS?

This may seem like a dumb question, but can you use the larger 24S/32S boards with 14S battery pack? I saw that some of them are adjustable via software, but it looks like its still limited to 16S at a minimum. Why is this a limitation and why cann't you run anything from 1S to the max of the board...
by ElectricGod
Apr 05, 2018 6:21 pm
Forum: Battery Technology
Topic: bluetooth BMS?
Replies: 401
Views: 15421

Re: bluetooth BMS?

Thanks again Do you confirm that it is possible to set custom balancing values, such as 4.11 balancing and 4.12 full charge ? I can't understand in the product description where that setting would be On both of the smart BMS types talked about here, you can set the voltages. 24/32S smart BMS http:/...
by ElectricGod
Apr 05, 2018 6:20 pm
Forum: Battery Technology
Topic: bluetooth BMS?
Replies: 401
Views: 15421

Re: 32S, 300 amp, BT, LCD BMS

This is truly confounding! This is a 32S BMS. That means it realistically needs to handle upwards of 140 volts depending on cell chemistry. So why does it have 100 volt mosfets (HY45N10's) on the C- side? Why no access to P- where it has 150 volt IRF4115's? There is no part of 100 volt mosfets that...
by ElectricGod
Apr 03, 2018 7:25 pm
Forum: Battery Technology
Topic: bluetooth BMS?
Replies: 401
Views: 15421

Re: bluetooth BMS?

csc wrote:
Apr 03, 2018 12:21 pm
Thanks electricgod, veryuseful info. I might try the 300 version then, do you recommand a particular seller ?
The 300 amp version has all the added copper except at P-...go figure!

Mine came from here.
https://www.aliexpress.com/store/285600 ... 7dcdqgUJOl
by ElectricGod
Apr 03, 2018 2:09 am
Forum: Battery Technology
Topic: bluetooth BMS?
Replies: 401
Views: 15421

Re: bluetooth BMS?

flippy wrote:
Apr 03, 2018 12:06 am
how do you drill copper sheet for the P+ without crumpling the copper?
Sandwich the copper between 2 pieces of wood and drill through the wood. It holds it all flat. You are duplicating the hole pattern of all those mosfets screwed down to the board.
by ElectricGod
Apr 02, 2018 10:53 pm
Forum: Battery Technology
Topic: bluetooth BMS?
Replies: 401
Views: 15421

Re: bluetooth BMS?

Izeman : high quality from China is OK for me Thanks for the link Electricgod ! This one at 150A looks pretty much the same, isn't it ? the differnce would be in te mosfet ? https://www.aliexpress.com/item/150A-8S-24S-Lithium-Battery-Protection-Board-Smart-Display-Balance-BMS-Coulomb-Meter-Ternary-...
by ElectricGod
Apr 02, 2018 9:35 am
Forum: Battery Technology
Topic: bluetooth BMS?
Replies: 401
Views: 15421

Re: bluetooth BMS?

Hi there I need to change my bms, as I'm fed up with Adaptto failures, and plan to move to another controller (still not decided) I have a 2wd bike with two batteries, 20s 9p front and 20s19p rear. Both must have a 150A bms, for backup reasons. I need bluetooth at least (a screen + BT woud be perfe...