restoring/recharging over-discharged lipo (lithium polymer) batteries! - lithium ion polymer battery
LiPo batteries should not be discharged below 3.
0 V/cell, otherwise they may be damaged permanently.
Many Chargers do not even allow you to charge the LiPo battery under 2. 5V/cell.
So if you accidentally let your plane/car run too long, you don't set the low voltage cut-off correctly in ESC (
Electronic speed controller
, Or you turn on the power switch and forget to unplug LiPo and leave your plane on the tree for the night (
Same tree, separated three times, because you are so excited and fly almost dark, so fly stupidly in a small place, etc. etc.
, You may find yourself in a situation where you have discharged LiPo below 3. 0V/cell.
What do you do?
Many people throw fat into the trash can. I don't.
I restore them. Here's how.
= = Note:-
I now maintain the latest version of this article on my website: If you would like to read the latest version, please click on the link above.
If you are interested in the article, you may also like the article, so be sure to check it out!
Charge your LiPo battery
Also, please subscribe to my website via the icon at the top
When you click on the link above. -
Many other articles can be found through the tabs at the top of the page, which open when you click on the links above, and can be found through many links on the right-hand side. -
The links to other articles you may like are at the end of this note.
=
"This is because it is well known that abuse of LiPo batteries can sometimes catch fire, some will burn houses or cars, and quite a few radio-controlled planes are on fire when they crash and are damaged due to fat.
However, during a reasonable or slow discharge, fat does not catch fire even if it is discharged all the way to 0 V/cell.
The LiPo that causes the full discharge to catch fire is the * charging * phase, not the discharge phase.
The reason is when LiPo is below 3.
7 V/cell, which begins to increase the internal resistance to accept the charge, some of which are permanent. Below ~3.
0 V/cell damage is serious enough and worthy of attention. Below ~2.
5 V/cell, most LiPo charger manufacturers say battery charging is too dangerous.
This is because the internal resistance of the battery charge has increased enough at this point that at such a low voltage level, the standard charging rate is too large for LiPo, since the standard 1C (
1 x Battery capacity)
Charging current may result in potential unsafe heat generation
Inside the battery. Below ~2.
The LiPo rate of 0 V/cell permanent internal damage is accelerated, below ~ 1.
5 V/cell damage rate (
Again, the internal resistance increases permanently)
Adding more will only get worse and worse.
The speed of this damage increase is not linear.
It may be a power function of the battery voltage, or it may be exponentially related to the battery voltage.
Both cases are not good and special care must be taken.
What I have to say now is that I have successfully restored dozens of batteries.
Some of the worst things I continue to use are as low as 1. 0V/cell.
However, I have successfully charged the battery as low as a few mV/cell--
It may be 10 mV/cell or 0. 010V/cell.
However, these batteries are useless and will soon be self-contained
After removing from the charger, discharge back ~ 0 V/cell.
Define "restore": before I go ahead, let me define what I mean when I say I have "recovered" these fats.
I'm not saying I 've fixed them or reversed the damage to them.
I'm not saying I brought them back. as-new.
Instead, I mean, I just simply charge them to a safe, usable level where they can continue to be used. That is all.
Reminder: what I describe below is how I can restore the battery. Use caution.
If your battery is at 0.
The internal resistance of 5 V/cell is much higher than that of only 1.
0 V/cell, the internal resistance in both cases is much higher than LiPo at 1. 5V/cell.
Again, the relationship is not linear in my opinion.
Keep in mind that high internal resistance is the cause of heat (
Could cause a fire if you are not careful)
During recharge
So if you try to "restore" your excess
Drain fat, you take full responsibility for what happens next.
Having said that, I have never had a problem.
The only battery I really care about is ~ Battery for 0 v/cell so I really looked at it very carefully and I charged it * especially * very slow.
I'm not going to go into detail with LiPo balance charger, but you definitely need a charger that can balance multiple balances
Battery pack with control charging current capability.
Note: If shipping speed and customer service are high priority, simply jump directly to 4 in the list below to see the Amazon prime LiPo charger option in the search results. 1)-
I highly recommend this charger;
It works well and has outstanding value.
Many other retailers have chargers that are at least twice as expensive. 2)
Akusel-
6 50 W 6A Balancer/charger with accessories-
It's also an outstanding, dirty
Smart Charger cheap, powerful.
Value-added;
However, it requires an external power supply such as: 105 W 15 V/7A switching DC power supply. 3)-
General List of Chargers;
Be sure to read reviews! 4)
Last but not least, don't forget Amazon!
Here are the results of Amazon's search for "LiPo Chargers.
Be sure to check this list when you get Amazon's excellent shipping speed and customer service!
Warning: LiPos