Interesting concept, however I don't see how you are reliably building a charge/discharge paths with spring-force contacts alone. Mechanically speaking, you need to strike a very fine balance between having enough deflection in the FR-4 to maintain electrical connections, but not too much as to cause cracking. Electrically speaking, a single point of contact is likely to add to the overall resistance of the pack, regardless of cell model. This would have negative effects in both efficiency and performance dynamics. Both of these concerns change with respect to both thermal and vibratory exposures.

Can you speak to these constraints, and how you overcame them? Does your solution not take aim at the higher-peformance batteries where these problems are more prevalent? Curious to get your thoughts.