Wishlist/LiFePO4 Battery

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A new battery type has appeared:


  • 1000+ (dis)charge deep-cycles.
  • Low self-discharge; 5% / month at 25 deg. celcius
  • Very electrically robust
  • Very mechanically robust - can literally be nailed without explosion danger.
  • -30...60 deg. celcius operating
  • a123systems ANR26650M1 3.3V 2.3Ah can be charged in 15 minutes.
  • a123systems ANR26650M1 3.3V 2.3Ah cells are laserwelded instead of crimping, which lower water losses and therefore extends celllife.

Test by Sandia National Laboratories:

Info-links a123systems:

Info-links sunhigh-battery:

  • Info AA Portable Power Corp:
    • Polymer Li-Fe-PO4 Cell: 8790160L 3.2V 10 Ah, 2 C Drain Rate (LFP-8790160L):
    • http://www.batteryspace.com/index.asp?PageAction=VIEWPROD&ProdID=4053
    • Quote: "...
    • $59.95
    • ...
    • New Generation Polymer Li-Fe-PO4 Battery: High discharging rate, non explosive, lighter weight and much safe
    • ...
    • Energy density: 124 wh/kg
    • ...
    • Dimensions (HxWxL) 8.9mmx92.5mmx163.0 mm
    • ...
    • Weight 258 grams
    • ..."

Traditional (Li-ion (polymer)) lithium-accumulator only handles 300-500 (dis)charge deep-cycles

How to prolong lithium-based batteries: http://www.batteryuniversity.com/parttwo-34.htm Quote: "... A lithium-ion battery provides 300-500 discharge/charge cycles. The battery prefers a partial rather than a full discharge. Frequent full discharges should be avoided when possible...Increasing internal resistance with cycle life and age is typical for cobalt-based lithium-ion, a system that is used for cell phones, cameras and laptops because of high energy density. The lower energy dense manganese-based lithium-ion, also known as spinel, maintains the internal resistance through its life but loses capacity due to chemical decompositions..."

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