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What now?Lipo batteries

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What now?Lipo batteries

Post  ototw on Sun Nov 27, 2011 4:54 am

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Last edited by agitatore on Wed Dec 14, 2011 10:41 am; edited 1 time in total

ototw
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Re: What now?Lipo batteries

Post  the DJ on Sun Nov 27, 2011 4:57 am

Ask Ray or uncle T to put it on their charger to discharge it to storage capacity.

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The pits

Post  ototw on Sun Nov 27, 2011 9:12 am

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Last edited by agitatore on Wed Dec 14, 2011 10:42 am; edited 1 time in total

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The Pitts

Post  ototw on Sun Nov 27, 2011 9:14 am

edit


Last edited by agitatore on Wed Dec 14, 2011 10:42 am; edited 1 time in total

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Re: What now?Lipo batteries

Post  the DJ on Sun Nov 27, 2011 9:35 am

Well your other option is to plug your battery into your car and run it up and down the street for 2mins!!!

From google for the not so bright!!!

1. If the Li-Po battery is fairly new and has been used no more than 70 times, has never reached temperature of more than 45 degrees, and never short circuited, the individual cells within the battery needs to be balanced before storage. This easily can be done through new versions of charger which has a "balance cell" function. Another method is to measure the voltage of each cell and set each cell to have an equal voltage to the least-voltage cell. The cells can be discharged using a simple-circuit light bulb making contact with individual cells, whereby slowly draining out each one. Once the cells are balanced, fully charge the battery, which will give each cell about 4.2 V. By doing this, the battery will be ready for a 2 to 4 month-long storage, upon which time the procedure must be repeated. Please note that ultimately, batteries of this condition stored using this procedure should not be kept for more than 1 year.

For batteries that are in a sorry state, such as having been used more than 70 times and have reached temperature higher than 60 degrees and has been short-circuited plenty of times, the first thing to keep in mind is to not hope for much. The procedure for storing these batteries still remains the same as the procedure above. Balance the cells first then charge the battery fully before storage. However, the result won't be great.

As for the storage, keep the battery in a zip-locked bag and place it in a padded aluminum or stainless container (such as a cookie box). Keep the box away from sunlight and humidity. The reason for the stainless box is to protect your house from fire which may be ignited by batteries short-circuiting. Better safe than sorry right?

2. It is not due to safety the manufactorers say they should be stored cold and at appr 40% charge, it is for the lifelength.
I have several times experienced that my LiPos do not deliver all the punch at the first flight when they have been stored fully charged for some weeks. Therefore I have began to follow the recommendations to charge halfway, store cold and top-charge the day before they are used. Gives me full performance.

3. How to Prepare Your Lithium Polymer Battery for Storage – Winter Battery Care

If your lithium polymer (lipo) batteries will be unused this winter or you’re planning on leaving them alone for a month or two, please read this helpful article.

If you need to store your lipoly batteries, we would like to help you make sure they are fresh the next time you need to use them. Li-Poly batteries do not handle being left in a fully charged or discharged state over an extended period.

To insure your lipo batteries do not loose capacity while left unused, please follow these basic steps:

1. Place your lipoly battery in a LipoSack
2. Charge the lithium polymer battery pack for storage to between 3.8V and 3.9V per cell (if your charger does not allow you to set the termination voltage, you can also fully charge the battery, and then discharge the battery to between 40-60% of its capacity. An awesome programmable lipoly charger is the Thunder Power 1010C)
3. Check the voltage of your lithium polymer batteries with a Digital Multi Meter once a month while they are in storage
4. Re-charge and balance your lipos as necessary to keep them between 3.8V and 3.9V per cell
5. Keep lithium polymer batteries inside the LipoSack and stored in a cool, dry place with a stable temperature of between 40 and 70 degrees F (4 to 21 degrees C)

When you need to use your lithium polymer batteries again, fully charge the lipo pack and it will be ready to go. Following the 5 easy steps above will help extend the life of your valued lipo batteries.



Google tells you everything bud!! Wink

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