V2 Battery Status Retrofit

[Ryan]

Hi Everyone,

I’m looking to create a retrofit device so that I can read the lowest and highest cell voltage values from the V2 controller. I also want to display under voltage and individual pressure difference warnings. I’m thinking about adding a microcontroller that connects to the throttle, ESC and battery CAN bus.

Battery CAN bus → microcontroller

ESC UART → microcontroller

microcontroller → V2 Throttle UART

V2 Throttle PWM → ESC (directly)

I will probably just add a few fields to the ESC UART package structure that the microcontroller sends out so the code changes to the throttle should be pretty minimal (famous last words).

Does anyone know if this is the right connector for the battery:

A&C Solutions - S526AGA00B01000

If it is, does anyone know where I can buy it? I reached out to ac-solutions and this was their reply:

A brief note in advance. A&C Solutions is Higo’s B2B partner in Europe.

If you are a consumer user, we recommend contacting your dealer. Unfortunately, we cannot assist you further.

[adoepner (Andrew Doepner)]

Is the V2 controller RP2040-based? I’ve lost my situation awareness on the evolution of the controllers. From what I understand V2.5 is now ESP32-based. I have an early SP140 and was working on getting the RP2040 controller (2022 era) to talk to the BMS. I wanted to engineer a solution around the BMS hard-cuts due to a low cell voltage (often with sag due to load at low SoC). As far as I got was to have a friend fly-wire an unused UART of the RP2040 IC. Other projects then took priority.

I would love to chat with you. It looks like your goals are the same as mine, but your approach is different.

Andrew