[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]

(ET) What kind of post is best [Virus checked]



I saw this on another EV posting site. Thought it might be interesting to
the group.

Dave Reuter

"""
The L posts work well for high current draws, but the automotive
posts are just as good or better.  It's a matter of contact area.  The
automotive posts also have the advantage that a cable can approach the
post from any angle.  That could be a major convenience in cabling up
your pack.

Of course automotive posts require automotive lugs.  If your cables
don't have them, stick with the L posts.  DO NOT use the threaded posts
available on some batteries.  They are not designed for the current
draws a typical EV sees.  They are made by casting bolts into the lead
posts.  When you attach a cable and tighten the bolt, you're squeezing
the lead between the bolt head and the cable lug.  Lead is soft enough
to flow, so the connection can become loose.  It's an open invitation
for a high-resistance connection, which causes heat, which softens the
lead more, so it flows, etc., etc. until you melt the post.

Some have used threaded posts and dodged the bullet.  There are too many
tales of woe concerning threaded posts to consciously decide to use them
over L or automotive posts if you have the choice.
"""