Here's a good tip to reduce corrosion on lithium battery connections:
Aluminum to copper Before connecting to prismatic cells with copper bus bars (dissimilar metals), burnish the aluminum terminals slightly to remove the coat of aluminum oxide, and cover with Noalox anti-oxidant compound, which you can get from, among others, Grainger.
(Thanks to Bull Dube' of KillaCycle for the tip.)
Source:
http://liionbms.com/php/prismatic_tips.php---
i've used the recommended Noalox before when installing solar electric panels using stainless steel bolts in aluminum frames to prevent galling and seizing, but interested to see it's also used as an anti-oxidant.
http://www.idealindustries.com/prodDetail.do?prodId=noalox