While someone here may be able to help you, you will likely have better luck on the thinkpad subreddit. https://www.reddit.com/r/thinkpad/ Check the links on the sidebar, there are some serious thinkpad enthusiasts on some of those other thinkpad subreddits.
On Sun, Nov 17, 2019 at 2:41 PM tom <[email protected]> wrote: > Has anybody got any details on the specifications for the communication > between the embedded controller and the battery module for the ThinkPad > T430? Also perhaps some CAD schematics of the battery module enclosure? > I'm not worried about the cryptographic handshake to verify battery > 'authenticity' as I've already replaced the proprietary BIOS with > CoreBoot which doesn't halt the CPU when an "Unauthorized" battery > module or mPCI expansion card is installed into the system. > > The Lithium Ion cells Levonvo used to manufacturer their batteries have > a lot of short comings and the 'genuine' cells are starting to suffer > from age. Even if you were to get a newstock one Lenovo did not choose > the highest quality cells and instead opted for lower amp hour lower > endurance cells which do not last as long. > > I already am familiar with the Lenovo BMS in the fact that they have > boobietrapped their hardware in an attempt to prevent owners from > modifying and repairing their own machines. Where you have to measure > the voltage of the existing cells and apply a similar DC voltage to the > BMS and each balance lead as dropping to 0VDC would cause the BMS to > brick itself. Compound this with the fact the module enclosure is > glued together and made with very thin shred-able plastic. While this is > doable I'm looking for a cleaner option. Perhaps a cleanroom design > from the ground up with modern cells and modern microcontrollers. > > Has anybody attempted to do this before and has some work I can > continue off of? > > Sort of an unrelated note but I would also be interested in motherboard > schematics that could be used to design a replacement mainboard in > the future with a modern ARM64 or RISCV (if that riscv matures) cpu > instead of the aging X86 Intel cores. If your not required to run > Microsoft Windows and have the source code to all of the programs you > rely on for productivity there's really no reason at all to use X86 > chips with all the heat they produce, power they consume, and > vulnerabilities they have. > > Provided you can get the power draw down you could even start > experimenting with different battery chemistries better suited for the > cycling and sustained usage of mobile computers. > _______________________________________________ > PLUG mailing list > [email protected] > http://lists.pdxlinux.org/mailman/listinfo/plug > _______________________________________________ PLUG mailing list [email protected] http://lists.pdxlinux.org/mailman/listinfo/plug
