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Experiences with TI BQ management IC’s when re-building laptop batteries ?

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rsjsouza:

--- Quote from: Fraser on October 01, 2019, 04:19:56 am ---Upon reading some comments in the TI support forums it seemed to be suggested that a specific version of BQEVSW was needed for each BQ series chip and even for a specific firmware ? All a bit over complex if true.

--- End quote ---
That is true. Each device was released with its companion software, which had a very specific set of features but they didn't aggregate newer devices to the existing platform - instead they simply rebuilt the entire GUI with different settings. Yeah, quite confusing, especially given the GUI had the same name across the different device variants...

I suspect a request would be cleared if it comes from a new product developer, not for repair...  :(

Fraser:
Rsjsouza,

Many thanks. The whole battery management chip situation appears a bit of a nightmare for anyone wanting to rebuild an obsolete battery. Such a PITA !

Best Wishes

Fraser

Siwastaja:
It's supposed to be a nightmare. The more or less correct term is DRM. It's there to prevent you from doing it.

Fraser:
Agreed,

I understand the OEM desire to discourage clone batteries or users taking risks by rebuilding a battery with inappropriate experience or cells, but sadly that sometimes means a piece of portable equipment effectively becomes obsolete through the simple failure of a battery pack that is no longer available  :( I knew I was likely facing this situation when I saw so little on the internet about successes in replacing cells in batteries that contain these darned Management chips.

I know the laptop battery market has a thriving 3rd party supply from China, so common laptops are not too badly effected. It is the specialist portable kit that takes a hit. Such a pity  :(

Fraser

Gribo:
If it is a pack side controller, you might be able to remove the protection by simulating a new battery connection, I had some luck with protection ICs unlocking when a 3.7V source was connected instead of the battery.

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