Anyone here have a good source for Li-On flat battery pack to use in a project?

Comments

• SRLM Posts: 5,045

  2013-02-22 10:43 edited 2013-02-22 10:43

  Flat pack? Hobby King has a good battery selection: http://hobbyking.com/hobbyking/store/uh_listCategoriesAndProducts.asp?whl=XX&pc=&idCategory=86&curPage=3&v=&sortlist=P&sortMotor=&LiPoConfig=2
• Duane Degn Posts: 10,588

  2013-02-22 11:08 edited 2013-02-22 11:08

  HobbyKing is even better if you can find the LiPo you want in the USA warehouse. The shipping is much less and much faster from within the US.
• Don M Posts: 1,654

  2013-02-22 11:59 edited 2013-02-22 11:59

  By flat I should have said similar in size to a large cell phone battery. Something on the order of 4" x 3" x thin (3/8") or less.
• CuriousOne Posts: 931

  2013-02-22 12:05 edited 2013-02-22 12:05

  I generally go and buy genuine Nokia BL5-C battery. Connect them in series/parralel, to get required voltage/current.
• RDL2004 Posts: 2,554

  2013-02-22 14:06 edited 2013-02-22 14:06

  By flat I should have said similar in size to a large cell phone battery.

  
  That type of battery is generally referred to as "prismatic".
  
  Here is a link to a seach for "prismatic" at All-Battery.com (just as an example).
  
  http://www.all-battery.com/search.aspx?find=prismatic
• Mark_T Posts: 1,981

  2013-02-23 15:06 edited 2013-02-23 15:06

  Li-On? Do you mean Li-Ion? Note that LiPo (lithium polymer) are _not_ lithium ion and orders of magnitude less safe (fire
  during charging is a very real hazzard with LiPo)
  
  Lithium ion cells are encased in metal and still have fire issues (see other threads!). LiPo are in a plastic envelope and are
  inherently a fire-risk (very good battery managment is needed - all mobile phones that use LiPo have battery management
  systems to monitor the health of the battery)
  
  LiPo do not tolerate over-discharge, over-current, over-charge or over-temperature - so do consider the risks and battery
  manangement.
  
  The safest rechargeable lithium chemistry is probably LiFePO4 ("lithium iron phosphate"), BTW, which are fairly available
  now and have the added advantage of being about 3.3V
• evanh Posts: 16,600

  2013-02-23 19:18 edited 2013-02-23 19:18

  Mark_T wrote: »

  Lithium ion cells are encased in metal and still have fire issues (see other threads!). LiPo are in a plastic envelope and are inherently a fire-risk (very good battery managment is needed - all mobile phones that use LiPo have battery management systems to monitor the health of the battery) ... The safest rechargeable lithium chemistry is probably LiFePO4 ("lithium iron phosphate")

  They are all Li-Ion. The differences in mechanical design don't even distinguish between chemistries, ie: The flat-pack LiPo's are the same unstable lithium cobalt chemistry as what's in cylindrical cased cells. The biggest difference between those two variants has traditionally being the resistivity of the electrodes due to the thinness of construction.