Dead Roadster 2.5 in Norway

[Cirion]

Short story, PEM died, Tesla replaced it, and the battery died while waiting.

Picked up my car, since the options I got from Tesla was ship the battery to Tesla US for repair, or order a 3.0 battery.

If anyone has any info on how to order the BMB PCBs from Nick and the connectors, chargers and so on to make them work, I'm able to assemble them and give it a try.

Now, I replaced the 12v battery, and connected a battery tender to supply it with 12v. I get headlights and hazard lights, but the rest of the car is dead. I have measured 13.78V at the 30A fuse under the hood, and the same at the headlight fuses. But the rest of the car shows 0.41V.

The service disconnect is out, does it need to be in to get the rest of the car to work? I mean, doors, display, stereo, windows....

 

[Cirion]

I found the ODS file with the connector names on github.
nickkelsey/tesla_roadster_bmb_extender

Now where to fab the boards? Quick delivery?

 

[dhrivnak]

Sorry to hear of your trouble and good luck.

 

[drewski]

Short story, PEM died, Tesla replaced it, and the battery died while waiting.

Picked up my car, since the options I got from Tesla was ship the battery to Tesla US for repair, or order a 3.0 battery.

If anyone has any info on how to order the BMB PCBs from Nick and the connectors, chargers and so on to make them work, I'm able to assemble them and give it a try.

Now, I replaced the 12v battery, and connected a battery tender to supply it with 12v. I get headlights and hazard lights, but the rest of the car is dead. I have measured 13.78V at the 30A fuse under the hood, and the same at the headlight fuses. But the rest of the car shows 0.41V.

The service disconnect is out, does it need to be in to get the rest of the car to work? I mean, doors, display, stereo, windows....

if it died in Tesla's hands, shouldn't they foot the bill for getting the car running again?

 

[Bunnak]

It's stories like this that I'd rather not have Tesla SC touch anything PEM or battery related when it comes to the roadster. But I do understand that in Europe you don't have many choices.

 

[PV-EV]

The VDS, VMS, instrument panel and a few other things are powered by the standby power which comes from the ESS connector J4 pin 1 (+12v) and pin 2 (ground)

 

[Cirion]

Ordered the BMB probes from China PCB Prototype & Fabrication Manufacturer - PCB Prototype the Easy Way, after a chat, they told me to just zip the folder and select 100x100 and pick the colors I wanted for the board. They would adjust the rest from the drawings if I attached the zip file.

All the connectors are available from https://www.mouser.com/.

Next part of the pussle, what charger to use? How to limit the voltage and amps to 100mA. What voltage should each cell reach before the onboard charger will allow charging?

 

[Cirion]

Boards arrived!

 

[Cirion]

Feels like christmas. DC-DC stepdowns arrived

 

[Cirion]

First board pulled:

 

[Cirion]

Tested with 2 boards, and both sheets show 3,98V per cell and 35,9V on the last.
Is that not high?

 

[Cirion]

Cell1 Cell2 Cell3 Cell4 Cell5 Cell6 Cell7 Cell8 Cell9
Sheet1 3,9 7,9 11,9 15,9 19,9 23,9 27,9 31,9 35,9
Sheet2 3,9 7,9 11,9 15,9 19,9 23,9 27,9 31,9 35,9
Sheet3 3,9 7,9 11,9 15,9 19,9 23,9 27,9 31,9 35,9
Sheet4 3,9 7,9 11,9 15,9 19,9 23,9 27,9 31,9 35,9
Sheet5 3,9 7,9 11,9 15,9 19,9 23,9 27,9 31,9 35,9

 

[Cirion]

 

[ML Auto]

If those readings are correct, your battery is charged and fine. You need to put the service disconnect back in and see what happens. Why did you think the battery died in the first place?

 

[Cirion]

Tesla told me it was dead after PEM replacement.

 

[Cirion]

After reseating all the BMB boards and plugging in the service disconnect, the car woke up.

 

[Cirion]

 

[Cirion]

 

[Cirion]

 

[Cirion]