Search found 181 matches

by ENNOID
Jan 03 2021 6:37pm
Forum: Battery Technology
Topic: Open source BMS for 48V to 400V lithium-ion battery pack
Replies: 236
Views: 40094

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

Can you put tabs on the board to allow for a discharge IRFS7530 to be added? Also circuitry for firmware control of the gate. You haven't read my previous post right? For your info, the latest kicad schematics are not on github yet... Keep in mind, your connection scheme might work on paper, but th...
by ENNOID
Jan 03 2021 8:37am
Forum: Battery Technology
Topic: Open source BMS for 48V to 400V lithium-ion battery pack
Replies: 236
Views: 40094

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

Maybe, I don't know, but it might works. This is a strange connecting scheme that I never saw before. You can try it if you want. The fets are on the BMS already, you would only need the external diodes. I'm using TOLL (to-leadless) package FETs on the BMS. They have even better performances than th...
by ENNOID
Dec 22 2020 4:47pm
Forum: Battery Technology
Topic: Open source BMS for 48V to 400V lithium-ion battery pack
Replies: 236
Views: 40094

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

No timeline for inverter & motor yet.

Battery packs are not the focus at the moment. New improved design is in the work related to the pack cells connections.
by ENNOID
Dec 21 2020 6:46pm
Forum: Battery Technology
Topic: Open source BMS for 48V to 400V lithium-ion battery pack
Replies: 236
Views: 40094

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

If there is one BMS for every 14s module, what stops you from putting modules in series to achieve higher voltages? You could use the charge only BMS-SS version (A charge only BMS-SS has no ability to turn off the discharge current path). The full BMS-SS version (with charge & discharge cutoffs...
by ENNOID
Dec 21 2020 7:20am
Forum: Battery Technology
Topic: Open source BMS for 48V to 400V lithium-ion battery pack
Replies: 236
Views: 40094

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

You must go with the Master-HV board with master/slave board topology & mechanical contactors at such high voltage level. The 18S solidstate version shown can only handle 18 cells in series maximum. The future 24S version will be able to handle 24 cells in series max. One option in your case wou...
by ENNOID
Dec 20 2020 5:33pm
Forum: Battery Technology
Topic: Open source BMS for 48V to 400V lithium-ion battery pack
Replies: 236
Views: 40094

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

@danli_new : ask this on the deco controller section instead. After many hours spent working on the third iteration, I came up to the conclusion that low side current sensing is the only way to go at the moment, so I had no choice, but to make some changes to the initial PCB layout, still the same 1...
by ENNOID
Nov 30 2020 3:41pm
Forum: Battery Technology
Topic: Open source BMS for 48V to 400V lithium-ion battery pack
Replies: 236
Views: 40094

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

Some improvements again on the 3rd iteration 18S unit that will also be included with the 1st iteration 24S unit: - Added an NRF52 Bluetooth module option on the backside, will be more practical than USB for monitoring & configuring - Added humidity sensor (For monitoring the moisture in the bat...
by ENNOID
Nov 17 2020 1:27pm
Forum: Battery Technology
Topic: Open source BMS for 48V to 400V lithium-ion battery pack
Replies: 236
Views: 40094

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

Price will be probably a bit above 200USD per unit.

24S version will not be ready before several month. Christmas holidays are coming and 18S version 3rd iteration is still not tested. I'm still waiting for some feedback from the 2nd iteration before ordering 3rd batch.
by ENNOID
Nov 16 2020 12:29pm
Forum: Battery Technology
Topic: Open source BMS for 48V to 400V lithium-ion battery pack
Replies: 236
Views: 40094

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

@stiffler359:

Just look a few comments above...

Targeted market for the solid state 18S version still in development is in the range for high end ebikes and has everything included on a single PCB. No need for any penthouse box there...
by ENNOID
Nov 16 2020 8:52am
Forum: Battery Technology
Topic: Open source BMS for 48V to 400V lithium-ion battery pack
Replies: 236
Views: 40094

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

I'm getting better with connectors after spending many, many hours looking for the right connector for my projects. Not an easy task, so many options and things to consider: - Pitch - Dimensions - No of circuits - No of row - SMD/through holes - Gold/tin - mating cycle - reflow tolerant - Straight o...
by ENNOID
Nov 12 2020 8:22am
Forum: Battery Technology
Topic: Open source BMS for 48V to 400V lithium-ion battery pack
Replies: 236
Views: 40094

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

CAN is a communication port actually used for advanced functionnalities like: - Throttling/limiting power on the ESC when the battery is almost empty or almost too hot for operating - Throttling/limiting power on the charger when the battery is almost fully charged, too cold or too hot - Throttling/...
by ENNOID
Nov 10 2020 12:23pm
Forum: Battery Technology
Topic: Open source BMS for 48V to 400V lithium-ion battery pack
Replies: 236
Views: 40094

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

Second batch of the 18S-solidstate 100+A was functional, but some little details were not perfect. The new 3rd iteration will be smaller & cheaper than initially planned with 60mm x 140mm & with a 75USD$ BOM (55$ for charge only+solder pads) and several improvements : Untitled-1.png Untitled...
by ENNOID
Oct 17 2020 1:19pm
Forum: Battery Technology
Topic: Open source BMS for 48V to 400V lithium-ion battery pack
Replies: 236
Views: 40094

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

Update: There is a new firmware & an new ENNOID-BMS tool app V0.12-alpha available: https://github.com/EnnoidMe/ENNOID-BMS-Tool/releases/tag/V1.2-alpha It is still in alpha stage because some planned features have not been tested or not functional yet, ex: LTC6810 support & mobile BLE GUI. O...
by ENNOID
Oct 10 2020 8:36am
Forum: Motor Technology
Topic: New ground-up ESC - MESC_FOC_ESC
Replies: 93
Views: 4678

Re: New ground-up ESC - MESC_FOC_ESC

Very nice project. Keep up the nice work. Good choice for the MCU, I'm using the same for my open-source BMS and used some files directly from VESC for the firmware comm. and using a modified VESC QT GUI for config/comm. Computing power should be enough for most BLDC motor applications, but might ge...
by ENNOID
Oct 09 2020 2:26pm
Forum: E-Vehicles General Discussion
Topic: Electric snowblower conversion: Gas powered Yamaha to 5kW electric
Replies: 3
Views: 2270

Re: Electric snowblower conversion: Gas powered Yamaha to 5kW electric

Battery is approx 1kWh with 120 x 2350mAh lithium-ion cells in 12S10P config. More than enough for most driveways. Snowblower consume much less power than I previously thought... My driveway is approx 100' long x 20' wide. 1 charge is normally enough with less than 15cm of fresh snow. I have two of ...
by ENNOID
Aug 27 2020 6:06pm
Forum: Battery Technology
Topic: Open source BMS for 48V to 400V lithium-ion battery pack
Replies: 236
Views: 40094

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

This will come my friend. I'm a bit reluctant about doing a prommotionnal video right now without everything in place. My idea is to show a whole product line of BMS & custom battery modules for DIY projects. I might be ready to pay for a professionnal at this point for the video montage. Lot of...
by ENNOID
Aug 27 2020 9:01am
Forum: Battery Technology
Topic: Open source BMS for 48V to 400V lithium-ion battery pack
Replies: 236
Views: 40094

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

I'm dropping this google form here, so if some people on endless-sphere would be ready to be beta testers for ENNOID-BMS-SS 18S or 24S version and pay for it, please fill this form:

https://docs.google.com/forms/d/1TVhF0I ... #responses
by ENNOID
Aug 21 2020 8:15am
Forum: Battery Technology
Topic: Open source BMS for 48V to 400V lithium-ion battery pack
Replies: 236
Views: 40094

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

ENNOID-BMS-SS is not functionnal yet, I had some issues with the charge pump on the BQ76200. I have not been able to enable the FET switches because the charge pump is not reaching the +14V that it normally should, stuck at 5-6V so UVLO is triggered. Seems like there is a leak somewhere and I had no...
by ENNOID
Aug 20 2020 2:19pm
Forum: Battery Technology
Topic: Open source BMS for 48V to 400V lithium-ion battery pack
Replies: 236
Views: 40094

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

Hi,

I think the LTC lineup has better features and flexibility than the IC you mentionned. Despite this, TI will soon release a new generation of BMS IC bq75614 which might be even better,... there is also infineon who have released an ltc6811 equivalent, but I am not so sure about using it...
by ENNOID
Aug 11 2020 4:11pm
Forum: Motor Technology
Topic: I'm looking for developers/engineers interested in high current (+1kA) controller development
Replies: 11
Views: 925

Re: I'm looking for developers/engineers interested in high current (+1kA) controller development

Any TI MCU in mind? Ideally something automotive grade I guess? What is the status of your firmware development? Contact me in PM if you are ok with sharing some infos about your project. I want to develop my own lineup of inverter one day compatible with my BMS system and offer them for sale on my ...
by ENNOID
Aug 11 2020 6:53am
Forum: Motor Technology
Topic: I'm looking for developers/engineers interested in high current (+1kA) controller development
Replies: 11
Views: 925

Re: I'm looking for developers/engineers interested in high current (+1kA) controller development

I'm curious to know what are the issues with the VESC software stack? Why not just improving it to fit your needs? Wouldn't it be easier to build on top of an existing platform ? I haven't looked yet at the very deep details of VESC firmware, but I guess some part of the code could be reused for a T...
by ENNOID
Jul 16 2020 9:44am
Forum: Battery Technology
Topic: Open source BMS for 48V to 400V lithium-ion battery pack
Replies: 236
Views: 40094

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

I finally got some time to almost finish the assembly of the all-in-one solid state version. Upper one on the picture is the 18 cells in series capable ENNOID-BMS-SS, below is the original DieBieMS: IMG_20200716_103024.jpg Only a few parts are missing ordering them today and should be able to test i...
by ENNOID
May 31 2020 7:25pm
Forum: E-Scooter and Motorcycle General Discussion
Topic: Denzel D9000 motor any thoughts?
Replies: 5
Views: 1480

Re: Denzel D9000 motor any thoughts?

For BLDC version software: https://drive.google.com/file/d/19kG2g7ahNc_ug7tmaA2iGrPMrpGhrnDQ/view?usp=sharing Alex seems to reply quite fast on the russian forum(Just use chrome with automatic translate): https://electrotransport.ru/ussr/index.php?PHPSESSID=7ldgj87gl9l4pf8s8pr93o4l26&topic=55093...
by ENNOID
May 25 2020 11:47am
Forum: Battery Technology
Topic: Open source BMS for 48V to 400V lithium-ion battery pack
Replies: 236
Views: 40094

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

Thank you. FYI, I'm using 0603 size which is not much harder than 0805. Prices might get lower one day, but for now I don't think I can produce for lower than that. There are a few things that I could do, like removing the quite expensive wurth connectors for bare soldering pads (user would have to ...