Kemikalije v baterijah

Rad bi samo opozoril (da ne delam drugje offtopica), da JE nevarno metati recimo litijeve baterije v vodo, saj v njih dejansko je litij kot kovina in reagira tako z vodo, kot tudi, če ga vržemo v ogenj, zato ne poslušajte, kako nekateri tukaj pravijo, da je potrebno litijevo baterijo celo preluknjati in vreči v vodo. Tale video prikazuje, kako dobimo litij iz litijeve baterije in prikazuje tudi reakcijo z vodo in plamenom. Če se vam to zgodi v ohišju baterije lahko seveda nastane tudi eksplozija:



LP

Ampak to so litijeve, ne litij-ionske, tako kot v drugi temi. V litij-ionski, tako kot ime pove, ne gre za litijev kovino, ampak za litijeve ione.

jest10 je 25. maj 2013 ob 16:35 izjavil:

In litij ne raznese. Poči vodik, ki se sprošča ob reakciji z vodo

Aha, a si mogoče pomislil, da v bateriji zaradi vodika lahko tudi nastane visok tlak zaradi česar baterija poči?

darkolord je 25. maj 2013 ob 14:44 izjavil:

Ampak to so litijeve, ne litij-ionske, tako kot v drugi temi. V litij-ionski, tako kot ime pove, ne gre za litijev kovino, ampak za litijeve ione.

Jah ampak vsaka mamca se ne spozna na baterije in bi lahko vsako baterijo, ki ima veze z litijem ali celo nima veze z njim vrgla v vodo.

Ampak opala, reakcija z vodo je vseeno nevarna (tudi strupeni plini se sproščajo), pa tudi v "zatesnjeno" lahko pride voda.

In tudi, če je ne dobiš v vsaki štacuni, to ne pomeni, da ni nevarnosti. Kakšen bolj pameten bi jo še v ogenj vrgel. Pred kakšnim letom mi je ravno brat razlagal, kako je eden njegov neumen sošolec segreval baterije z vžigalnikom, kaj vse se mularija spomni, lahko je vesel, da je še v enem kosu.

jest10 je 26. maj 2013 ob 07:20 izjavil:

Ja, pa RTG baterija tudi seva in te poškoduje, če jo razdreš. Pa kaj, če jo ne moreš kupiti, nevarnost obstaja!!!

Mislm ej, tukaj si zmišluješ neke neobstoječe nevarnostni, v sosednji temi ti je pa čisto ok polnenje preveč izpraznjene li-ion baterije-stvar ki je dejansko nevarna

//Argumentirana debata, argumentiraj zakaj je nevarno in podaj dokaz. (vsak lahko namreč pametuje)

Pa da se ne boš preveč matral, recimo malo za pokušino:

Simply over-discharging a lithium-ion cell to 0 V will not cause a thermal runaway reaction.
However, such over-discharge can cause internal damage to electrodes and current collectors
(i.e., dissolution of copper) (Figure 33), can lead to lithium plating if the cell is recharged
(particularly, if the cell is repeatedly over-discharged), and can ultimately lead to thermal
runaway. Most consumer electronics devices set specific discharge voltage limits for their
lithium-ion battery packs, at which point an electrical switch will disconnect the electrical load
from the battery pack to prevent over-discharge. This switch is reset upon charging. However,
such a mechanism cannot completely prevent over-discharge. For example, a battery pack may
be discharged to the low voltage cutoff and then stored for an extended period of time during
which self-discharge of the cell ultimately results in over-discharge. Most pack protection
electronics will allow the recharge of over-discharged cells, despite the potential for the negative
electrode to become damaged. Therefore, over-discharge does periodically cause thermal
runaway of lithium-ion cells.
Forcing a cell into "reversal" (charging to a negative voltage, "forced over-discharge") may
cause thermal runaway. UL and UN tests provide a minimum requirement for resistance to
forced over-discharge for cells used in multi-cell packs. These tests are designed to simulate the
most likely mechanism of forced discharge, which occurs when a cell with lower capacity than
its neighboring series elements is present in a multi-series battery pack that is externally short-
circuited. A lower capacity cell of this type can occur due to aging of the battery pack. In this
scenario, current flow from the higher capacity series elements in the pack will drive the
discharged series element into reversal. The UN and UL testing does not include repeated forced
discharge. Thus, if a system does not include protection electronics that will detect and disable
charging of a damaged cell, it is possible a cell could be repeatedly force over-discharged and
ultimately undergo a thermal runaway reaction.

klik
Čez morje ostalega materjala se mi pa preprosto ne da brskat zate