11/2023 – 2/2024

INTRO

This is the Battery Management System for the V66 battery pack, this design has been the work of Chandler Johnston, Peter Schinske, and Melana Evans. They were on the team in previous years and put a lot of time and effort into this design, and I’d like to give them credit for this board. My job for this years board was to fix some minor changes that caused errors in last years board and to add more series connections since this years battery is a higher voltage than last years, and to design the new circuit board that would fit into this years battery segments.

SCHEMATICS

This board is based around the MAX14920ECB+ chip, I added in 3 more connections to the MAX chip for the extra batteries in series, I also omitted some parts that we decided to get rid of for this years design. This project has 7 schematics, 3 of which have copies made of them. This is because the entire board has two MAX chips, since one chip doesn’t have enough connections for the 22 series battery connections on the board. The last schematic just connects these two sides together. This can be seen on the image of the board, a large air gap indicates the two different sides.

PCB DESIGN

This is one side of the entire board, showcasing all the parts of the board that are also on the other side. This board was a good challenge for me, while the board was quite large, laying down traces in a neat fashion for all the signals was difficult since there was so many connections all over the board that needed to be made. Doing this right was essential for me since I didn’t want any cross talk on the board and wanted to make the board look neat and professional. If I were to do this again I’d want to find a way to make the two sides of the board identical, since they have the exact same components, just with different labels (i.e.: U1_A, U1,B… R12_A, R12_B).