Search found 221 matches

by ENNOID
Nov 23 2021 10:50am
Forum: Battery Technology
Topic: Open source BMS for 48V to 400V lithium-ion battery pack
Replies: 341
Views: 64726

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

Schematics on github are quite outdated. I stopped to make newest designs open source.

Firmware & software are still open source so you can use it. They do represent 90% of the work, Hardware design is only a small part.
by ENNOID
Oct 21 2021 2:51pm
Forum: Battery Technology
Topic: Open source BMS for 48V to 400V lithium-ion battery pack
Replies: 341
Views: 64726

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

BMS take cares of main contactors activation depending on readings & user defined parameters with the ENNOID-BMS-tool. Different setups requires different parameters. There is a "not used timeout setting" that can be set to a small amount of time if you want to avoid standby losses wit...
by ENNOID
Oct 17 2021 10:50am
Forum: Battery Technology
Topic: Open source BMS for 48V to 400V lithium-ion battery pack
Replies: 341
Views: 64726

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

Depends on which product you are referring to. For SS, SS-LITE & future XLITE when BMS is turned off, current consumption is well below 50uA for all of them. You have probably more discharge from the terminals than from the BMS itself. Those boards can work down to 4S packs, but I must changes m...
by ENNOID
Sep 13 2021 8:47am
Forum: Battery Technology
Topic: Open source BMS for 48V to 400V lithium-ion battery pack
Replies: 341
Views: 64726

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

Master-LV GEN 2has some new features: humidity sensor + charger voltage readings +5V isolated CAN bus output Master-HV is still in GEN 1 and will be updated to have the same new features as LV GEN 2 version. Slave boards are now shipped with those gold plated self-locking molex SL connectors with as...
by ENNOID
Sep 09 2021 12:11pm
Forum: Battery Technology
Topic: Open source BMS for 48V to 400V lithium-ion battery pack
Replies: 341
Views: 64726

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

If they could copy properly, that would be less worrying... My fears is that they don't even understand what they are selling. I can say that just after a quick look on their pictures & from what I read in the description... According to what I read, their BMS is capable of doing things that are...
by ENNOID
Sep 09 2021 6:04am
Forum: Battery Technology
Topic: Open source BMS for 48V to 400V lithium-ion battery pack
Replies: 341
Views: 64726

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

Chinese copy of a reverse engineered GEN 1 EBMS... Shame on those chinese folks. Anyway Gen 2 is now shipping on my website and include more functionalities , way better connectors & better specs than those gen 1... I will change my mind about those chinese folks if one day I receive some money ...
by ENNOID
Jul 12 2021 8:16pm
Forum: Battery Technology
Topic: Open source BMS for 48V to 400V lithium-ion battery pack
Replies: 341
Views: 64726

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

those IC you are pointing to are not even worth considering... unless maybe if I had a customer who would like to get designed a bms for an impact drill or similar device with a predetermined too expensive IC. I'd rater go with bqxxx from TI instead for such application. LTC68xx are not that expensi...
by ENNOID
May 30 2021 6:36am
Forum: Battery Technology
Topic: Open source BMS for 48V to 400V lithium-ion battery pack
Replies: 341
Views: 64726

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

How did you get the PCB files? Those might be quite old I guess.

Those pads were used for helping heat dissipation on 2 layer PCB
by ENNOID
May 03 2021 4:41am
Forum: Battery Technology
Topic: Open source BMS for 48V to 400V lithium-ion battery pack
Replies: 341
Views: 64726

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

It is well documented in the LTC68XX datasheets.

Internet transformers are actually quite cheap. I moved away from transformers on the 24S EBMS board mostly for keeping it small & compact.
by ENNOID
Apr 07 2021 3:01pm
Forum: E-Vehicles General Discussion
Topic: Electric snowblower conversion: Gas powered Yamaha to 5kW electric
Replies: 7
Views: 4043

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

Thanks. I have upgraded the battery with my own ENNOID-BMS-SS boards since. I know that DieBieMS are now very hard to get and also have some issues (both hardware & software) that have now been fixed with my own version of the BMS. I'm selling these BMS on my website. Battery kits will follow th...
by ENNOID
Apr 01 2021 10:47am
Forum: Motor Technology
Topic: New ground-up ESC - MESC_FOC_ESC
Replies: 178
Views: 10623

Re: New ground-up ESC - MESC_FOC_ESC

Moving the hall to timer 3 and 1 gpio works fine and frees up CAN. At low speed the timer isn't really useful and at high speed it's actually easier and better to have it running off just 1 hall sensor. Presently I'm not even using the timer, but I definitely want encoder capability. Thank you for ...
by ENNOID
Mar 31 2021 9:05am
Forum: Battery Technology
Topic: Open source BMS for 48V to 400V lithium-ion battery pack
Replies: 341
Views: 64726

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

Is the BMS tracking CV stage trailing amps, or just defining 100% from voltage?
I answered a very similar question already asked by Flippy in a previous post
by ENNOID
Mar 30 2021 9:08am
Forum: Motor Technology
Topic: New ground-up ESC - MESC_FOC_ESC
Replies: 178
Views: 10623

Re: New ground-up ESC - MESC_FOC_ESC

Outside of power stage design : I spent an hour this morning to look at the MESC design & schematics. I just realized that there was no CAN interface. I think this could become an issue for some users. I know modifying the pinout design to enable CAN would require a lot of work, but I'm still wo...
by ENNOID
Mar 28 2021 6:39pm
Forum: Battery Technology
Topic: Open source BMS for 48V to 400V lithium-ion battery pack
Replies: 341
Views: 64726

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

within 3-8% accuracy It depends on many factors. Seems reasonable to say within 10% accuracy and probably more like 5% in most cases based on the coulomb counter with the SS boards. Some fancier algorythm as discussed earlier based also on cell voltage could help to improve the precision a bit. Thi...
by ENNOID
Mar 28 2021 1:44pm
Forum: Battery Technology
Topic: Open source BMS for 48V to 400V lithium-ion battery pack
Replies: 341
Views: 64726

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

how fast is the current/power measurement? As fast as the power monitor IC can do, I'm normally using the ISL28022 if you want to look into the details. The sampling rate is not handled by the BMS firmware directly, but by the power monitor IC. I'm using the highest number of sampling per reading a...
by ENNOID
Mar 28 2021 6:43am
Forum: Battery Technology
Topic: Open source BMS for 48V to 400V lithium-ion battery pack
Replies: 341
Views: 64726

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

The original ENNOID-BMS GEN 1 master board & the associated slave boards are using the same firmware & software stack as the newest SS lineup. They are oriented toward high voltage/high power applications which is well beyond e-bikes power level. This forum is mostly e-bike related. So that ...
by ENNOID
Mar 27 2021 11:43am
Forum: Battery Technology
Topic: Open source BMS for 48V to 400V lithium-ion battery pack
Replies: 341
Views: 64726

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

Will add a thin top cover on top of the actual cover to protect the power terminals.
I could possibly use aluminum for the flat bottom plate.
by ENNOID
Mar 26 2021 7:25am
Forum: Battery Technology
Topic: Open source BMS for 48V to 400V lithium-ion battery pack
Replies: 341
Views: 64726

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

Been playing with the idea of a 3dprinted PETG plastic case recently… I thought that some folks might want a case with the SS BMS. It also looks more like a finished product with a case, but I won’t use this myself for my packs. I don’t know what to think about it honestly. It should at least surviv...
by ENNOID
Mar 24 2021 12:48pm
Forum: Battery Technology
Topic: Open source BMS for 48V to 400V lithium-ion battery pack
Replies: 341
Views: 64726

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

All balance/temperature connectors have different pin qty. 10 for temperatures (they are signal ),12 & 13 pins for balance. The actual design prevent the user to connect the balance connector into the temperature receptable (opposite would not damage anything) & can't mix 12 & 13 pins ba...
by ENNOID
Mar 24 2021 11:43am
Forum: Battery Technology
Topic: Open source BMS for 48V to 400V lithium-ion battery pack
Replies: 341
Views: 64726

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

Yes, SS-24 fits on 100x60mm board, even with a fuse for USB GND :P. I had to be creative for making this fit on a 4 layers board:
Untitled.png
Untitled.png (152.62 KiB) Viewed 1105 times
by ENNOID
Mar 24 2021 9:59am
Forum: Battery Technology
Topic: Open source BMS for 48V to 400V lithium-ion battery pack
Replies: 341
Views: 64726

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

No, you haven't discovered anything... It is obvious to use one single charger...this is how everyone does...

Start your own thread please and stop polluting this one.
by ENNOID
Mar 24 2021 9:11am
Forum: Battery Technology
Topic: Open source BMS for 48V to 400V lithium-ion battery pack
Replies: 341
Views: 64726

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

Thank you Flippy.

This is the kind of request that are useful & will be implemented. This will serve everyone using the product.
by ENNOID
Mar 24 2021 5:54am
Forum: Battery Technology
Topic: Open source BMS for 48V to 400V lithium-ion battery pack
Replies: 341
Views: 64726

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

There are some TVS on the USB & serial to usb adapter. Never heard of any problem related to USB failure. There is no direct link between main power path & plane gnd on the SS version. Schematics are not released for SS boards. But I agree with you there is always a risk. I paid attention to...
by ENNOID
Mar 24 2021 5:16am
Forum: Battery Technology
Topic: Open source BMS for 48V to 400V lithium-ion battery pack
Replies: 341
Views: 64726

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

"solarsail" Stop this! For the second time... Go to another thread. Your requests are simply out of scope. This SS BMS is definitely not aimed for your project. Get a look at master/slave BMS topology with single charger instead. Sorry, but you are alone here... The newly created compact S...
by ENNOID
Mar 23 2021 7:16pm
Forum: Battery Technology
Topic: Open source BMS for 48V to 400V lithium-ion battery pack
Replies: 341
Views: 64726

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

Only if that were possible. I have 6 to 9 modules permanently cabled together in series. How do I charge the modules with a single charger? By running around every three hours and re-plugging the charger? Or are you suggesting a 900V charger which will not work as you are dealing with multiple BMS ...