Jumping Jack Flash weblog

Smaltimento (“disposal”) batterie al litio – 2

Posted in auto elettriche, batterie, scooter elettrici by jumpjack on 16 luglio 2013


Ho trovato questa interessante guida ( http://oes.tamu.edu/web/guidelines/battery/LiPo Procedures.pdf ) allo smaltimento delle batterie al litio, anche se limitatamente alle LiPo, mentre per le LiFePO4 c’è quest’altra guida ( http://manuals.hobbico.com/hca/lifesource-manual-v2.pdf )… che dice praticamente le stesse cose, tranne l’ultimo passo: non buttare nel secchio ma smaltire in isola ecologica:

LiPo

The LiPo disposal procedure is from Thunder Power r/c:
** DISPOSAL OF LIPO BATTERIES **
Unlike NiCd batteries, lithium-polymer batteries are environmentally friendly.
For safety reasons, it is best that LiPo cells be fully discharged before disposal
(however, if physically damaged it is NOT recommended to discharge LiPo cells before
disposal – see below for details). The batteries must also be cool before proceeding with
disposal instructions.
To dispose of LiPo cells and packs:
1. If any LiPo cell in the pack has been physically damaged, resulting in a swollen cell or
a split or tear in a cell’s foil covering, do NOT discharge the battery. Jump to step 5.
2. Place the LiPo battery in a fireproof container or bucket of sand.
3. Connect the battery to a LiPo discharger. Set the discharge cutoff voltage to the
lowest possible value. Set the discharge current to a C/10 value, with “C” being the
capacity rating of the pack.
The “1C” rating for a 1200mAh battery is 1.2A, and that battery’s C/10 current value is
0.12 A can be used. As such a, a resistor or set of light bulbs can be used as long as
the discharge current doesn’t exceed the C/10 value which can cause an overheating
condition. For LiPo packs rated at 7.4 V and 11.1 V, connect a 150 ohm resistor with a
power rating of 2 watts (commonly found at Radio Shack) to the pack’s positive and
negative terminals.
Discharging can also be done by connecting the pack to an ESC/ motor system and
allowing the motor to run indefinitely until no power remains.
4. Discharge the battery until its voltage reaches 1.0V per cell or lower. For resistive
load type discharges, discharge the battery for up to 24 hours.
5. Prepare a plastic container (do not use metal) of cold water. This container should
have a lid, but it need not be be air-tight. Mix in 1/2 cup of salt per gallon of water. Drop
the battery into the salt water and allow the battery to remain in the tub of salt water for
at least 2 weeks.
6. Remove the LiPo battery from the salt water, wrap it in newspaper or paper towels
and place it in the normal trash. They are landfill safe.

Cioè si tratterebbe solo di “disattivarle”  in quanto, a differenza di quelle al piombo, intrinsecamente non inquinanti.

Per disattivarle bisogna scaricarle fino a 1,0 volt  o meno e tenerle poi per 2 settimane a mollo in acqua salata. Dodpoichè si possono buttare nel secchio.

Per le LiFePO4:

To dispose of LiFe cells and packs:
1. If there are any signs that any LiFe cell in the pack has
been physically damaged, resulting in a swollen cell or a
split or tear in a cell’s covering, do NOT discharge the battery.
Jump to step 5.
2. Place the LiFe battery in a fireproof container or bucket
of sand.
3. Connect the battery to a discharger. Set the discharge
cutoff voltage to the lowest possible value. Set the discharge
current to a C/10 value, with “C” being the capacity rating of
the pack. For example, the “1C” rating for a 1200mAh battery
is 1.2A, and that battery’s C/10 current value is (1.2A / 10)
0.12A or 120mA. Or, a simple resistive type of discharge load
can be used, such as a power resistor or set of light bulbs,
as long as the discharge current doesn’t exceed the C/10
value and cause an overheating condition. It’s also possible
to discharge the battery by connecting it to an ESC/motor
system and allowing the motor to run indefi nitely until no
power remains to further cause the system to function.
4. Discharge the battery until its voltage reaches 1.0V per
cell or lower. For resistive load type discharges, discharge
the battery for up to 24 hours.
5. Submerse the battery into bucket or tub of saltwater
(5-10% salt solution). This container should have a lid, but
it does not need to be airtight. Prepare a bucket or tub
containing 3 to 5 gallons of cold water, and mix in 1/2 cup of
salt per gallon of water. Drop the battery into the saltwater.
Allow the battery to remain in the tub of saltwater for 7 to
10 days.
6. After 7-10 days in the saltwater the LiFe battery can be
removed. Please recycle the battery at your local battery
recycling center. Do not dispose of the battery in the
regular trash.

Una Risposta

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  1. GianniTurbo said, on 16 luglio 2013 at 9:32

    vabbe bisogna trovare una spiaggai incontaminata in sardegna per buttare le baterie, è l’unico posto dove c’è tatat acqua salata…🙂


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