Search found 59 matches

by ENNOID
Jun 12 2019 6:04am
Forum: Battery Technology
Topic: LTC6811 Implementation Thread
Replies: 132
Views: 12911

Re: LTC6811 Implementation Thread

I started to work om my own bms last year based on the software from DiebieMS. The BMS is functionnal, but we are still improving the software and making the final tuning.

https://www.ennoid.me/battery/bms
by ENNOID
Apr 12 2019 10:10pm
Forum: Motor Technology
Topic: VESC controller: Check Axiom datasheet!
Replies: 352
Views: 47945

Re: VESC-controller: Axiom hardware released!

Hi, Is it still using the same STM32F4 MCU as the original VESC? For such an high-end motor controller, I think it could be a good idea to port the VESC code to an AEC (automotive qualified) MCU in the foreseeable future. That could even increase the value of this motor controller. I'm just wonderin...
by ENNOID
Apr 11 2019 7:45pm
Forum: Motor Technology
Topic: VESC controller: Check Axiom datasheet!
Replies: 352
Views: 47945

Re: VESC-controller: Axiom hardware released!

Good job team! I think you have created something that I would call "the linux version of the motor controller" . In theory it can run any motor at any power level. Very cool! What will be the price asked? I might be tempted, I have been waiting for this update since a while... I expect a very high ...
by ENNOID
Mar 09 2019 10:58am
Forum: Battery Technology
Topic: Fuse-wire for individual cells, DIY Tesla style
Replies: 113
Views: 17082

Re: Fuse-wire for individual cells, DIY Tesla style

or easy to remove top case plate & also a removable bottom plate as well for changing the damaged cell... not really a problem there I think... but, how do you see a non-functionnal/shorted cell on another kind of battery pack anyway? I don't see any other way.
by ENNOID
Mar 09 2019 10:50am
Forum: Battery Technology
Topic: Fuse-wire for individual cells, DIY Tesla style
Replies: 113
Views: 17082

Re: Fuse-wire for individual cells, DIY Tesla style

exact, not easy to know which cell doesn't work in the lot.. but the whole pack will still be functionnal and the pack won't burst into flames. the main idea behind fusing all cells is for pack security if one cell get damaged by unwanted event... maybe a sofisticated bms could detect a failure afte...
by ENNOID
Mar 09 2019 9:57am
Forum: Battery Technology
Topic: Fuse-wire for individual cells, DIY Tesla style
Replies: 113
Views: 17082

Re: Fuse-wire for individual cells, DIY Tesla style

Yeah sure, I will post update on endless-sphere and on my github page were all my design files are located:

https://github.com/EnnoidMe/ENNOID-PACK

Thanks
by ENNOID
Mar 09 2019 9:41am
Forum: Battery Technology
Topic: Fuse-wire for individual cells, DIY Tesla style
Replies: 113
Views: 17082

Re: Fuse-wire for individual cells, DIY Tesla style

I'm still working on it. I'm using kweld kit. You can choose the wire gauge you want depending of the individual cell max current that you want. I am using this AWG 28 wire : https://www.amazon.ca/gp/product/B01BDA7DO6?pf_rd_p=5a1aedcb-634e-416c-9e4d-99f483cdfe00&pf_rd_r=RGTR6ZZ4F7DBXAXRR8N5 Accordi...
by ENNOID
Mar 09 2019 9:09am
Forum: Battery Technology
Topic: Fuse-wire for individual cells, DIY Tesla style
Replies: 113
Views: 17082

Re: Fuse-wire for individual cells, DIY Tesla style

Hi, I have been playing around the idea to create my own battery pack with 18650 cells and I realized that my design is very similar to Alta's pack with fuse wire, PCB on top for fuse wire & plastic case all around the cells. Just a few pictures to show the idea of my PCB intended design for fuse-wi...
by ENNOID
Mar 06 2019 9:23am
Forum: Battery Technology
Topic: BMS for 48V to 400V lithium-ion battery pack
Replies: 33
Views: 5454

Re: BMS for 48V to 400V lithium-ion battery pack

c10yas, Molex Micro-lock is a very nice connector and would be a good replacement. I just don't have the crimpers to insert terminals on the cables. The OEM crimpers are very expensive as well, something like 500$... Do you know if PA-20 crimpers would work with the terminals? I normally buy very ch...
by ENNOID
Feb 28 2019 4:30pm
Forum: Battery Technology
Topic: BMS for 48V to 400V lithium-ion battery pack
Replies: 33
Views: 5454

Re: BMS for 48V to 400V lithium-ion battery pack

I still didn't understand what is the balancing dissipating current which is possible with the board ? I see surface mounted resistors , so it's not more than 1W I guess? For quick charged batteries , I'm not sure is it enough or not ? For 100Ah cell charged for 4hours , I should measure the circul...
by ENNOID
Feb 27 2019 5:55pm
Forum: Large EV General Discussion
Topic: Large EV? - I have one of those!
Replies: 7
Views: 803

Re: Large EV? - I have one of those!

Nice idea & way safer project than your previous manned quadcopter!
by ENNOID
Feb 26 2019 4:45pm
Forum: Battery Technology
Topic: BMS for 48V to 400V lithium-ion battery pack
Replies: 33
Views: 5454

Re: BMS for 48V to 400V lithium-ion battery pack

Hi, Right now, the current sensor is external and not mounted on master PCB. The actual current sensor is an isolated shunt copper bar mounted on a tiny PCB which is equipped with an amc1303 amplifier & isolated power. Available in the github repository. On master, there is a connector with 3.3V out...
by ENNOID
Feb 10 2019 2:13pm
Forum: Large EV General Discussion
Topic: Electric Snow Blower (Gravely)
Replies: 8
Views: 973

Re: Electric Snow Blower (Gravely)

Funny and very similar to my homemade battery powered snow blower:

https://endless-sphere.com/forums/viewt ... =7&t=98592
by ENNOID
Feb 07 2019 7:50pm
Forum: Battery Technology
Topic: BMS for 48V to 400V lithium-ion battery pack
Replies: 33
Views: 5454

Re: BMS for 48V to 400V lithium-ion battery pack

The BOM for LTC6811 is completed and the order on digikey is ready . I can provide a link to share my basket on github ennoid-BMS. The new LTC6813 IC are still scarse right now on mouser and digikey, and I will wait before working on the board. Anyway for testing LTC6811 will be cheaper and easier. ...
by ENNOID
Feb 07 2019 8:40am
Forum: E-Vehicles General Discussion
Topic: 10 Kw Homemade Battery powered snowblower
Replies: 8
Views: 747

Re: 10 Kw Homemade Battery powered snowblower

Yeah, it is quite handling surprisingly well until now despite the weight. In fact, it pushes against the compacted snow incredibly well and independent wheel control makes cornering easy. Reverse is also done just by moving a switch, so no problem there... Next upgrade would be to install tracks in...
by ENNOID
Feb 06 2019 5:51pm
Forum: E-Vehicles General Discussion
Topic: 10 Kw Homemade Battery powered snowblower
Replies: 8
Views: 747

Re: 10 Kw Homemade Battery powered snowblower

Yeah probably close to 450lb :lol:
by ENNOID
Feb 06 2019 1:46pm
Forum: E-Vehicles General Discussion
Topic: 10 Kw Homemade Battery powered snowblower
Replies: 8
Views: 747

10 Kw Homemade Battery powered snowblower

I built my own snowblower from recycled 6 x 12V = 72V lead acid battery pack approx. 500Wh each. The body of the snowblower contains 12 packs all connected in parallels for a total energy content of 6 kWh. The front auger is from an old gasoline powered snowblower that I adapted to fit on the new ba...
by ENNOID
Feb 06 2019 7:11am
Forum: Battery Technology
Topic: BMS for 48V to 400V lithium-ion battery pack
Replies: 33
Views: 5454

Re: BMS for 48V to 400V lithium-ion battery pack

Hi VietJr, LTC6813 or LTC6811 slave board have the same function. The user can pick the board that best fit his pack voltage. UPS is a small board that makes 12V @ 1 amp peak and can recharge battery (standard automotive 12V lead acid or 3S lithium cells). the battery is required to supply the peak ...
by ENNOID
Jan 27 2019 4:20pm
Forum: Battery Technology
Topic: BMS for 48V to 400V lithium-ion battery pack
Replies: 33
Views: 5454

Re: BMS for 48V to 400V lithium-ion battery pack

c10yas, If you have already a secondary power system in place, you can connect it to master directly and that is the reason why there is a connector for connecting external power on Master PCB. For example, electric car have normally an auxiliary 12v lead acid battery for delivering the power rush f...
by ENNOID
Jan 27 2019 7:43am
Forum: Battery Technology
Topic: BMS for 48V to 400V lithium-ion battery pack
Replies: 33
Views: 5454

Re: BMS for 48V to 400V lithium-ion battery pack

Peakon28, I admit, I haven't looked yet at every details from ltc6813 documentation, but it seems to be very similar to the original ltc6803 from diebiems. Ltc6811 is a good replacement for ltc6803 that I think would not require any coding at all. Before ordering any PCB, I think i will create anoth...
by ENNOID
Jan 26 2019 10:54am
Forum: Battery Technology
Topic: BMS for 48V to 400V lithium-ion battery pack
Replies: 33
Views: 5454

Re: BMS for 48V to 400V lithium-ion battery pack

Hi C10yas, Well I was not saying model does not have balancing. Obviously it has balancing but according to the pictures and the reviews from Munroe & associate, they seems to have very narrow tolerance on the cell voltage. On the PCB no external mosfet for balancing are visible, they seems to use m...
by ENNOID
Jan 26 2019 9:39am
Forum: Battery Technology
Topic: BMS for 48V to 400V lithium-ion battery pack
Replies: 33
Views: 5454

Re: BMS for 48V to 400V lithium-ion battery pack

Salut Haswell, I am not sure to understand what you mean by "force balancing"? The jumpers on the slave board have been put in place just for comparing internal vs external balancing. I guess external balancing has more advantage than disadvantages, but I wanted to test both options before creating ...
by ENNOID
Jan 17 2019 12:14pm
Forum: Battery Technology
Topic: BMS for 48V to 400V lithium-ion battery pack
Replies: 33
Views: 5454

Re: BMS for 48V to 400V lithium-ion battery pack

I spent some time on the design recently. I will send the gerber for fabrication soon I guess. I will wait for some feedbacks before doing so. Here is what happened: - Transfered DieBieMS schematics into kicad - Switched the balancing circuit to the LTC6813 IC instead of LTC6803 - Adapted the schema...