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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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