BMS for Tesla

[freds]

Another open source firmware project you might look at for the Teensy is the SimpBMS one. I purchase a complete setup from “Second life EV Batteries”.

If I had more time I might use the open source SimpBMS software on Tiny32 and link it's serial port to Raspberry Pi to do the rest of the BMS functionality and automation integration with NodeRED and skip using the CAN bus interface. It would be much cheaper to take that route at the expense of being more technically involved. Note: The SimpBMS serial interface is constantly sending detailed info of all the attached Tesla modules as it's default mode.

 

[alexzan]

Someone recommended this: http://store.evtv.me/proddetail.php?prod=EVTVDue2

Has anyone worked with that or understands how it would work with this?

 

[Ampster]

I have been following Jack Rickard since he was actually building EVs. He is constantly evolving. His back office is more capable now of providing support than when he first began.
I drive two Teslas but do not understand the pros and cons of using the Tesla modules versus just using the wires and a standalone BMS. It may turn on your familiarity with programming or interacting with an Arduino or Raspberry Pi.

 

[alexzan]

I have been following Jack Rickard since he was actually building EVs. He is constantly evolving. His back office is more capable now of providing support than when he first began.
I drive two Teslas but do not understand the pros and cons of using the Tesla modules versus just using the wires and a standalone BMS. It may turn on your familiarity with programming or interacting with an Arduino or Raspberry Pi.

Is that who makes the board I just posted? Is there any info that shows how to set it up/how it works?

 

[Ampster]

Is that who makes the board I just posted? Is there any info that shows how to set it up/how it works?

I don't know the details. There are EVTV videos and user comments but i don't know if there is a user forum for Jack's products.
I have been using the same BMS for the last two packs and did give some thought to using Tesla modules on my next pack upgrade. I was going to continue to use that BMS and a duplicate because I don't have Arduino skills. Ultimately I decided on LFPs which are less expensive than Tesla modules. I am in the process of that transition now.

 

[alexzan]

I don't know the details. There are EVTV videos and user comments but i don't know if there is a user forum for Jack's products.
I have been using the same BMS for the last two packs and did give some thought to using Tesla modules on my next pack upgrade. I was going to continue to use that BMS and a duplicate because I don't have Arduino skills. Ultimately I decided on LFPs which are less expensive than Tesla modules. I am in the process of that transition now.

Thanks! by LFP you mean LiFePO ? Where are you able to get them for cheaper than tesla modules? I wonder if I can find something similar in Canada, but doubtful.

 

[Ampster]

I wonder if I can find something similar in Canada, but doubtful.

I got mine from Deligreen and will start a thread as soon as they arrive next week. There are several threads about the 280 Ahr generic LFPs and a specific one for Canadian purchasers. I think there is also an emerging BC group buy.

 

[alexzan]

I found another option. I think I might go with this solution since I see now benefit to using the proprietary Tesla child modules and trying to hack a host for them.

The DIYBMS v4

 

[alexzan]

I got mine from Deligreen and will start a thread as soon as they arrive next week. There are several threads about the 280 Ahr generic LFPs and a specific one for Canadian purchasers. I think there is also an emerging BC group buy.

Did you get it from here? https://www.alibaba.com/product-det...a2756.order-detail-ta-ta-b.0.0.5f8d2fc2Tnn1ty

or do you have another link? thanks!

 

[Ampster]

or do you have another link? t

Sorry I use the Alibaba app and can't find a way to copy a link. The name of the company is Changsa Deligreen Power and my sales rep ia April Cao

 

[cory151]

Here is what Ive been using for awhile now. The Tesla BMB has proven itself the most safe means of controlling the module.

Battery module controller - BPath Energy

BMS for a.o. reading and safe balancing of Tesla lithium batteries and communication and interface with a.o. Victron equipment

www.bpathenergy.nl

 

[Cayo]

What are my options for available bms' ?

BMS 6S 1.2A Balancer Li-ion Lipo Lifepo4 LTO Active Equalizer Battery Board | eBay

Find many great new & used options and get the best deals for BMS 6S 1.2A Balancer Li-ion Lipo Lifepo4 LTO Active Equalizer Battery Board at the best online prices at eBay! Free shipping for many products!

www.ebay.com

How to:

...And concerning the possibility of a 6ft high blazing fireball,

https://www.amazon.com/gp/product/B07XV7H1GJ/ref=ox_sc_saved_title_3?smid=AIG8S5GW20F81&psc=1

 

[dougbert]

For what it is worth and if you didn't see my build thread where I switched from LA to tesla modules using Jack Rickard's product, the EPS32 V2

I will link to the post, where I decided to go with the EPS32 V2 https://diysolarforum.com/threads/s...n-2000-on-my-house-and-it-shows.11/post-75795

it whole purpose in life is to protect the tesla battery from too low and too high temps and too low voltage and too high voltage on charging.

yes it is not cheap at $2500 plus $900 in extension parts, but it 'can' handle 62 modules

but my goal is not 1 or 4 modules but 20 to 22 modules in my pack, so the ESP cost is very small part of the cost

I like the re-use of these batteries.

the biggest issue is getting an inverter that handle 38.4 to 50.4 volt range of the tesla (in 2S configuration)

 

[Ampster]

I like the re-use of these batteries.

Thanks for the update. I was using Nissan Leaf modules before I switched to LFP cells last year. I had been seriously considering Tesla Modules. I drive two Teslas so I have confidence in their quality and that module that Jack built sounded great. I had been following Jack since 2011 when I did and EV conversion. I always thought it was ironic that Jack was a big supporter of the No BMS bottom balancing clan but to his credit saw the light and then actually produced one. May he rest in peace.

 

[curiouscarbon]

just wanted to chime in with a hardware option for interfacing with CAN device that i'm evaluating..

microcontroller : adafruit QT PY SAMD21 cpu
CAN controller+tranceiver
I2C isolator to interface with outside the module.

Adafruit QT Py - SAMD21 Dev Board with STEMMA QT

What a cutie pie! Or is it... a QT Py? This diminutive dev board comes with our favorite lil chip, the SAMD21 (as made famous in our GEMMA M0 and Trinket M0 boards).This time it comes with ...

www.adafruit.com

CAN-BUS Shield - DEV-13262 - SparkFun Electronics

The CAN-BUS Shield provides your Arduino or Redboard with CAN-BUS capabilities and allows you to hack your vehicle. This shield allows you to poll the ECU

www.sparkfun.com

Adafruit ISO1540 Bidirectional I2C Isolator

Sometimes you'll find yourself with an I2C bus controller on one side, and an I2C bus device on the other and you gotta keep em (electrically) separated. Maybe because one is ...

www.adafruit.com

e.g. tesla cells <-> tesla BMS <-> CANshield <-> QTPY <-> i2c isolator <-> (your application)

perhaps power the CANshield, QTPY and one side of i2c isolator from battery module, and have some main thing that talks to them all. just sharing for food for thought!

hope everyone with tesla modules can have a good time.

 

[E=MC4]

I believe that module consists of over 70 cell bricks in 6 or 7 serial groups. You just need a 6 or 7S BMS with adjustable set points for voltage. You should check my assumptions. The cells are NMC which have a nominal voltage of 4 volts. 6 times 4 is 24 volts. Some of the 8S BMSs can be configured for 6 or 7 Serial cells.

On this thread the poster used Tesla modules and maybe he describes the BMS.

DIY Tesla powerwall

Time to install a critical loads panel! The demonstrates the value of being adaptable. What are you planning on doing to switch between your inverter and the grid in case you need to work on the inverter? Eisenhower said, on the eve of D day, " Plans are nothing, planning is everything." I...

diysolarforum.com

Can you offer more specifics on which 8S BMS can be configured for use with 6S? I'm looking for a 6S Li-Ion BMS in the neighborhood of 250 amps but I can't find any on the market. My Tesla's didn't come with the Tesla BMS attached but it has a 6S balance lead pigtail in its place. The $2,500 Jack Prickard special is too pricey for me. The Daly's are less than $200 for that amperage for the LiFePo4's which is the neighborhood I'm looking at.

Edit: I may be able to get away with two 125A BMS. My set up is 2 - 24V Tesla modules in parallel powering a 24V/5,000W continuous PSW inverter (10,000W surge). So 5,000W/24V = 208A or 104A from each Tesla module. Is my math correct?

 

[Jennifer]

I have searched through half a dozen pages of tesla bms results on the whole forum there wasn't anything that stood out or conclusive in regards to what is the BMS option for a tesla s module in 2020.

Some of us are using the EVTV BMS, it's super scalable for expansion, here's a great thread... forgive if already posted.

Solar house generator I started DIY back in 2000 - My path from Trace to Xantrex (on FLA battery) to XW Pro inverters on Tesla Model S batteries

2024-04-19 Version Update When I started this thread back in 2019, I did not realize it would turn into a build thread of my system. It documents What and Why I did things as well has How they were accomplished. It also shows designs that didn't work out, and also designs that did work out...

diysolarforum.com

Solar house generator I started DIY back in 2000 - My path from Trace to Xantrex (on FLA battery) to XW Pro inverters on Tesla Model S batteries

Yay, only one more sleepy till my goodies (shown above including BMS) arrive... I better hurry and catch up to you. :)

diysolarforum.com

Jen

 

[Jennifer]

I don't know the details. There are EVTV videos and user comments but i don't know if there is a user forum for Jack's products.

Discussed at the below two links..

Solar house generator I started DIY back in 2000 - My path from Trace to Xantrex (on FLA battery) to XW Pro inverters on Tesla Model S batteries

2024-04-19 Version Update When I started this thread back in 2019, I did not realize it would turn into a build thread of my system. It documents What and Why I did things as well has How they were accomplished. It also shows designs that didn't work out, and also designs that did work out...

diysolarforum.com

Solar house generator I started DIY back in 2000 - My path from Trace to Xantrex (on FLA battery) to XW Pro inverters on Tesla Model S batteries

Yay, only one more sleepy till my goodies (shown above including BMS) arrive... I better hurry and catch up to you. :)

diysolarforum.com

Jen

 

[Jennifer]

For what it is worth and if you didn't see my build thread where I switched from LA to tesla modules using Jack Rickard's product, the EPS32 V2

Oh see, there you go, you already posted your build, awesome...