3
\$\begingroup\$

In my project I need a battery with a cylinder of 10mm diameter and 35mm high. I thought only Lithium Polymer technology can create battery for this size. Now I discovery Lithium-ion can have the same size!

Both are very equal in voltage and capacity. But, the capacity is critical and if I can win 10 mAh for the same size, I will choice this technology.

So, is it easy to say what technology is better? Or it depend from manufacture? Or even: The differences are so small that it doesn't matter what I choice?

\$\endgroup\$
  • \$\begingroup\$ Lithium-Ion Polymer (Li-Po) tends to be more energy dense than Li-ion, but they're usually flat. If it's cylindrical, a Li-ion cell is probably a better pick - less dense, but you're using more of the space. Chemistry will have far less impact than which exact cell you use, though - batteries have come a long way even in the last five years. \$\endgroup\$ – Someone Somewhere Jun 1 '16 at 11:23
4
\$\begingroup\$

Both types of construction have similar characteristics in terms of degradation, charging behavior, and susceptibility to deep discharge problems, but:

  • Li-Polymer have a slightly higher energy density because of the way in which the separator (salt bridge) is made. This comes at a 10-30% increase in cost, however.

  • It's possible to make flexible batteries with Li-Polymer, and to make them thinner than Li-Ion.

Source: http://www.allaboutsymbian.com...

\$\endgroup\$
  • \$\begingroup\$ Note that another site states that the energy density of Li-Poly is worse than Li-Ion. I believe this information is out of date. \$\endgroup\$ – JYelton Oct 14 '13 at 3:38
  • \$\begingroup\$ Just to give a feedback, price and weight is not a problem. I already see LiPol battery thinner as paper. \$\endgroup\$ – Rodrigo Oct 14 '13 at 4:15
  • \$\begingroup\$ Can you give a number for this: slightly higher energy density? About 5%, maybe 10%? \$\endgroup\$ – Rodrigo Oct 14 '13 at 4:23
  • \$\begingroup\$ Sorry, I'm not able to find any reliable information. Based on searches for recent information, I'd almost say it is negligible because some references indicate Li-Poly energy density is less while others indicate it is higher. I would guess 5% or less. \$\endgroup\$ – JYelton Oct 14 '13 at 4:33

Your Answer

By clicking “Post Your Answer”, you agree to our terms of service, privacy policy and cookie policy

Not the answer you're looking for? Browse other questions tagged or ask your own question.