Cetaman
Captain
Flight distance : 2528264 ft
United States
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Aloha Ken,
This is the link to the study on LiPo charging cycles. If I started a thread would you be interested in commenting and maybe fleshing out some of the information presented?
http://batteryuniversity.com/lea ... ium_based_batteries
This is the link to the Forum thread;
http://forum.dji.com/forum.php?m ... mp;page=1#pid510174
This is one post in the commentary. Of course I am no authority, just interested. What you said made sense to me;
Maybe this is what DJI-Ken (I think) was alluding to about the charging depth and discharge stress. This is from the second article you cited.
Table 2: Cycle life as a function of depth of discharge.
A partial discharge reduces stress and prolongs battery life.
Elevated temperature and high currents also affect cycle life.
Depth of discharge Discharge cycles
100% DoD 300–500
50% DoD 1,200–1,500
25% DoD 2,000–2,500
10% DoD 3,750–4,700
Dropping to 50% DoD triples or quadruples the Discharge Cycles (DC). As a "Break-in Period" of 10 cycles at 50%, the reduced stress should show up over time and DCs. This would seem to support with "hard evidence" the contention that "50% discharge for the first 10 cycles" will prolong the battery life. This looks to me like a "Break-in Period" of 10 cycles is a good idea backed up "some-what" by "hard evidence".
The major benefit in this approach is psychological. My first 30 flights with 3 batteries discharging to 50% was a good way to reduce my eagerness to fly and introduce discipline into my flying. This has helped in many ways having nothing to do with batteries, but it appears my batteries may benefit as a result.
In summary, I owe you and DJI-Ken (I think) a debt of gratitude for fleshing out this suggestion and concern. Mahalo Nui Loa to you and DJI-Ken (If not DJI-Ken, I apologize profusely to whoever made the suggestion and Mahalo Nui Loa to you). But, to be truthful we can never thank DJI-Ken enough for all the assistance he gives us.
Aloha and Drone On! |
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