Brammo Owners Forum

General => Off Topic => Topic started by: Mithion on August 10, 2012, 05:33:35 PM

Title: Stackable Batteries Article
Post by: Mithion on August 10, 2012, 05:33:35 PM

Found this on CNET. Looks pretty interesting, wonder if it could work in a vehicle application?

http://news.cnet.com/8301-17938_105-57490803-1/exovolt-stackable-battery-creates-unlimited-capacity/ (http://news.cnet.com/8301-17938_105-57490803-1/exovolt-stackable-battery-creates-unlimited-capacity/)

Title: Re: Stackable Batteries Article
Post by: protomech on August 10, 2012, 06:41:53 PM

All production EVs that I'm aware of use a modular battery: Enertia uses 6 Valence U1-12XP modules; 2012 Zeros use 1-3 ZF3 modules; Enertia Plus uses 2 BPM 44/70 modules; Empulse uses 7 BPM 15/90 modules. Making it modular makes it easier to diagnose and repair when faults crop up.

What we haven't seen much of are modular systems which allow varying capacity batteries to be constructed. MotoCzysz's 2010 E1PC went with this approach. One interesting wrinkle here is that the above e-motos connect the modules in series, where for a variable capacity approach you want to connect the modules in parallel (to keep the system voltage fixed). I assume the Exovolt system connects its modules in parallel.

Here's one builder who's making a variable-capacity removable pack for his e-moto:
http://www.elmoto.net/showthread.php?2439-The-Battery-Module-Project (http://www.elmoto.net/showthread.php?2439-The-Battery-Module-Project)