Dark Energy won't cause the "Big Rip"

One of the theories about the nature of Dark Energy is that it keeps
growing and growing as the Universe expands. At some point the Dark
Energy is so strong that it can counteract the Strong Force and rip
matter apart, right at the subatomic level! This study seems to say that
Dark Energy will not grow, so there is no chance that matter will be
ripped apart at such a small scale.

No "Big Rip" in our Futu Chandra Provides Insights Into Dark Energy |
Universe Today
"But the Chandra study strengthens the evidence that dark energy is the
cosmological constant, and is not growing in strength with time, which
would cause the Universe to eventually rip itself apart."
http://www.universetoday.com/2008/12...o-dark-energy/