neues BMS

Rozhkov schrieb: ... the price is so high because ...

@Andrii:
There is to reason to justify the price.

You spent so much time, knowledge, energy and money in developing your bms, so in my opinion it is absolute okay.
A brand new Twizy bms costs about 600,- €
I don`t know the actual price of edriver bms, but I suppose it is similar.

The differnences between edriver bms an yours are:
1. edriver bms is already working in several Twizys, and it seems to be reliable in every day usage.
But there are still some minor, known problems!
2. yours is in stock, edriver bms is sold out and nobody knows whether or when Pascal will be able to build the next charge!

In case that I will start another battery project, I will buy and test your bms without hesitating!


Two more questions:
1. When the 5 bms are sold, will you immediately build some more?
2. In case that there are bugs in the firmware, is there an easy way to update it?
By ODBII or Bluetooth for example?

Great work!

Wie wohltuend.
Nach nur 3 Monaten Forumsmitgliedschaft und 9 Posts gibt es ein offenbar funktionierendes BMS inklusive Anleitung und Konfigurationsapp.

Den etablierten Forumsluftpumpen und Dampfplauderern reicht das nicht mal zur Vorstellung ihrer "Jahrhundertprojekte"

Das Edriver-BMS kostet nicht so viel. Jetzt muss er wohl etwas Gas geben, wenn er nicht auf den ganzen halbfertigen BMS sitzen bleiben will.

Goldbacher schrieb: Das Edriver-BMS kostet nicht so viel.

Kannst du diese Aussage in eine Dezimalzahl übersetzen?
Z.B. 250,- € würde ich als ähnlich viel bezeichnen.

@Rozhkov:

I ordered a few days ago the cells for the battery conversion of my and my brother's Twizy.
So I'll have to face in the near future with original BMS limits. For this reason I'm looking for alternatives.

Can you tell me if your firmware for the BMS board is based on "Twizy Virtual BMS" API by dexter?
This will encourage me (and may be others) a lot...

Meine Aussage bezog sich auf den Preis, den Snorre in den Raum gestellt hatte.

Snorre schrieb: @Andrii:
There is to reason to justify the price.
....
A brand new Twizy bms costs about 600,- €
I don`t know the actual price of edriver bms, but I suppose it is similar.

Goldbacher schrieb: Das Edriver-BMS kostet nicht so viel.

Hat etwas gedauert, bis ich das Missverständnis durchschaut habe.
Mit dem ähnlichen Preis meinte ich den Vergleich mit dem BMS von Andrii.
Ich sehe ein, das die Formulierung sehr unglücklich war.

Also nochmal im Klartext:
Der Preis von Andriis BMS und der vom edriver BMS sind wohl sehr ähnlich.
Pascal dürfte auch im Bereich von 250,- € liegen.
Da sehe ich keinen gravierenden Unterschied.

My bms drives daily in 7 cars in Poland and fortunately no one has reported any problems yet, for updates you will need a stlink programmer. But there are no problems yet, so I don't plan any updates either, Perhaps I will make small changes to the display in the program, because it does not work perfectly

Yes, when writing the code, I took twizy virtual bms as an example, but I wrote from scratch, since the libraries for the can bus for arduino and stm32 are significantly different

I did it not for one day or one month, but for about a year and a half, I did it in my free time as a hobby. I didn't plan to sell these boards at all because I think it's a risk, but having said enough, I'm confident in its work. Note, I'm using a translator so sorry for the translation inaccuracies

Snorre schrieb:

Rozhkov schrieb: ... the price is so high because ...

1. When the 5 bms are sold, will you immediately build some more?

Yes, but after I am sure that all 5 out of 5 bms will work and people will be happy , which known problems with edriver bms?

The Voltage in Cell 1 doesnt Match. This cell goes lower and Higer (dis-cgarge)
And the edriver BMS isn't realy available (up to 3 year waiting time)

Have you implemented the quick start function? (Turn the key ALL the way and hold it)
At the beginning, this feature was not included in the e-Driver, which caused confusion during installation.

I didn't do it on purpose, but it works, I do like this too

Two years ago we implemented one of the first e-Driver BMS. The Twizy did not start
We were all sad because we have been working for two days. Then a friend who doesn't have a own Twizy
went to the Twizy, sit insinde and started it with he the "original" way

Then we realized, that the BMS worked well only without the quick start
As far as I know the software update removed this bug.