New Battery - BMS Reset Query

[freypal]

Hi - I've got a new battery arriving tomorrow as the original in my V60 T4 has given up on life after 8 years. I've had a low battery warning for ages but the last cold snap seems to have finished it off and it now won't hold charge for more than a day.

Anyway - I'd read that on fitting the new battery I should reset the BMS. Either using VIDA/Scan tool or with a button press combo (which I intend to do).

Question is do I need to give it a bit of time running the car around to ensure the new battery is fully charged before resetting the BMS? Or am I ok to just fit the new battery, reset the BMS, leave it idle for ~6hrs and away I go?

Thanks!

[Tannaton]

If you leave the battery disconnected for 10 mins or more when changing it - this will usually reset the BMS. It will then take a while to re-calibrate to the new battery - it needs several periods of the car being locked for <8hours.

Vids on YouTube with other methods as to how to reset the BMS

[Clan]

Originally Posted by freypal

Hi - I've got a new battery arriving tomorrow as the original in my V60 T4 has given up on life after 8 years. I've had a low battery warning for ages but the last cold snap seems to have finished it off and it now won't hold charge for more than a day.

Anyway - I'd read that on fitting the new battery I should reset the BMS. Either using VIDA/Scan tool or with a button press combo (which I intend to do).

Question is do I need to give it a bit of time running the car around to ensure the new battery is fully charged before resetting the BMS? Or am I ok to just fit the new battery, reset the BMS, leave it idle for ~6hrs and away I go?

Thanks!

you don't need to do anything, It will start acquiring new data again as soon as you connect the battery up again. It stores about 4 pages of A4 data.. journey times and mileages and just about every interesting parameter you can imagine. Very helpful for diagnosing and Battery or charging problems.