---

Hej NG,

Hvordan er det bedst at lade et lio-ion batteri op?

Skal de aflades helt før genopladning? Skal de lades op hver gang de har
været i brug eller hvordan skal de håndtere?

/Glenn

---

"Glenn Rasmussen" skrev
> Hvordan er det bedst at lade et lio-ion batteri op?
> Skal de aflades helt før genopladning? Skal de lades op hver gang de har
> været i brug eller hvordan skal de håndtere?

Li-ion batterier skal ikke aflades inden genopladning.
De trives også fint med sjat-lading og kan snildt
puttes i laderen når man har brugt dem lidt. Vær
dog opmærksom på at ingen batterier har godt af at
oplade 2-3x deres normale opladetid.
--

Med venlig hilsen

Peter Schrøder
peterschATvip.cybercity.dk
replace AT with @ to reply

---

Hej Peter Schrøder,

Tak for dit svar.

> oplade 2-3x deres normale opladetid.

Det vil sige, at mine li-ion batterier ikke har godt af at lade i 4-6 timer,
hvis de f.eks. allerede er klar efter 2 timer?

/Glenn

---

Glenn Rasmussen wrote:

> Det vil sige, at mine li-ion batterier ikke har godt af at lade i 4-6 timer,
> hvis de f.eks. allerede er klar efter 2 timer?


Nej det er kun første gang, når man tager et Li-Ion batteri i
brug, at det kan være aktuelt med en 200% ladning, men mange
ladere slår selv fra, og med dem kan en overladning ikke lade
sig gøre.

Og et Li-Ion må aldrig aflades 100% til 0 Volt, for så kan det
ikke genoplades, og bare rolig, dit kamera kan ikke aflade ned
til den grænse...

--
Med venlig hilsen - Niels Riis Ebbesen
http://www.niels-ebbesen.net - Free-lance grafik & webdesign
http://www.photo-gallery.dk - Skandinaviens største fotoarkiv
http://home3.inet.tele.dk/elgo - Links til alverdens søgemaskiner

---

Niels Ebbesen PowerBook <niels@niels-ebbesen.net> wrote:

>Nej det er kun første gang, når man tager et Li-Ion batteri i
>brug, at det kan være aktuelt med en 200% ladning, men mange
>ladere slår selv fra

Faktisk alle når det handler om Li-ion. Dér kan overopladning nemlig
medføre, at der dannes 'rent' lithium i batteriet, og det er noget
agressivt og springfarligt noget... *BUM*

Større Li-ion-batterier har ofte elektronik til af- og
opladningsbegrænsning indbygget af samme årsag.

--
Kåre

---

Kåre Nejmann wrote:

> Faktisk alle når det handler om Li-ion. Dér kan overopladning nemlig
> medføre, at der dannes 'rent' lithium i batteriet, og det er noget
> agressivt og springfarligt noget... *BUM*
>
> Større Li-ion-batterier har ofte elektronik til af- og
> opladningsbegrænsning indbygget af samme årsag.


Hvis du er meget tjekket på det tekniske omkring Li-Ion batte-
rier, så kunne jeg godt tænke mig, at lokke dig til at hjælpe
med en opdatering af batteri FAQ'et på flg. URL:
http://www.photo-gallery.dk/side-08.htm

Dengang det blev skrevet, da var Li-Ion batterier i digicams
noget relativt nyt, jeg har selv draget en stibe posetive er-
faringer med Li-Ion, som jeg vil skrive om, bidragydere bliver
krediteret...

PS: Batteri FAQ'et er meget velbesøgt, hvis man på Google
søger på genopladelige batterier, så kommer siden op blandt
de første søgeresultater...

--
Med venlig hilsen - Niels Riis Ebbesen
http://www.niels-ebbesen.net - Free-lance grafik & webdesign
http://www.photo-gallery.dk - Skandinaviens største fotoarkiv
http://home3.inet.tele.dk/elgo - Links til alverdens søgemaskiner

---

On Wed, 16 Jul 2003 00:31:16 +0200, Niels Ebbesen PowerBook
<niels@niels-ebbesen.net> wrote:

>PS: Batteri FAQ'et er meget velbesøgt, hvis man på Google
>søger på genopladelige batterier, så kommer siden op blandt
>de første søgeresultater...

Der er en artikel her, der forklarer hvordan Lithium-ion batterier
virker. jeg fandt den på Google groups:


Fra:Glenn W. Bernasek (dd314@cleveland.Freenet.Edu)
Emne:Re: How do Lithium-ion Batteries work?
View: Complete Thread (3 artikler)
Original Format
Nyhedsgruppe:sci.chem.electrochem
Dato:1996/05/16

dd314@Cleveland.Freenet.Edu (Glenn W. Bernasek)

I'd like to take this opportunity to address the discussion and
thoughtfull contributions to two recent threads on this
newsgroup. "AA Lithium Ion" and "Does Lithium Ion Really Not
Have a Memory Effect?"

The discussions have been participated by users, knowedgeable
users and persons experienced in the development of either the
lithium ion powered devices (notebook computers) or the Li-Ion
batteries. (I am fortunate to have rather extensive experience
in the latter.)

The points I hope to "clarify" are as follows:

1. There appears to have been some inadverdant "mixing of
battery names and chemistry". There are essentially two basic
lithium battery systems in the market place. One is the primary
(single discharge) lithium / FeS2 (Iron disufide) cell such as
the Energizer "Litheon" or Lithium , "AA" and "AAA" size 1.5 volt
battery and the lithium / MnO2 (Manganese dioxide) 6 volt photo-
flash Duracell battery and 9 volt battery by Ultralife. The
other is the secondary (rechargeable) 3.6 volt Lithium Ion O.E.M.
(Original Equipment Manufacture) battery designed for use in
notebook computers, camcorders and cellular phones. (Another
secondary lithium battery is the Lithium / MnO2 system by
Tadiran. This battery uses a lithium metal anode and is not
classified as a Li-Ion system.)

Remember, one is the SINGLE DISCHARGE - Lithium / FeS2 or MnO2
system and the other is the RECHARGEABLE - LITHIUM ION battery.
The chemistry of the lithium ion system is a Carbon anode and a
lithiated metal oxide cathode such as LiCoO2, LiNiO2 or LiMn2O4.
The Li-Ion battery is called the "Rocking Chair Battery" because
the lithium ION is shuttled back and forth between the carbon
anode and the metal oxide cathode by a process called
'intercalation' (inserting the lithium ions into the carbon
anode crystal lattice during charge and into the metal oxide
cathode during discharge). Under CONTROLLED conditions, there
is NO metallic lithium involved. (This is one of the reasons
the Li-Ion battery is NOT an off-the-shelf consumer item.)


2. There may have been some confusion regarding some device
manufacturer's instructions to completely discharge the Li-Ion
battery before recharging as opposed to some manuals that say a
recharge is allowable at any time. The Li-Ion system DOES NOT
have the so-called "memory effect" that was once attributed to
the old NiCad batteries. The Li-Ion battery can accept a
"make-up", "top-off" or "float" charge without penalty to the
discharge capacity. However, it must be noted that Li-Ion
batteries are O.E.M. systems and are built in what are called
"smart packs" designed by the battery pack and/or device
manufacturers. (As to the reason why some devices require a
complete discharge before recharge and others don't is left to
conjecture and is best known by the manufacturer.)

These battery packs contain rather sophisticated circuitry that
works in conjunction with or independently of the device they
are powering. The battery pack and/or device controls ALL
aspects of the discharge and recharging operations of the Li-
Ion system. User interface is kept at a MINIMUM. If the
device battery needs to be discharged before recharging, the
discharge circuit kicks in to regulate and limit the rate and
depth of discharge. Should the battery require a recharge, the
special Li-Ion cc/cv charger, when plugged into an appropriate
AC voltage supply, takes charge and allows the battery to fully
recharge at a preset rate and to a preset voltage limit, thereby
preventing any overcharge conditions from developing.

The individual Li-Ion cell is essentially in a completely
discharged condition when assembled. That is, the carbon anode
has NO lithium in its structure. The cell must be electro-
chemically "formed" and "tested" by the manufacturer before
it can be assembled and used in a battery pack. The forming
procedure is simply one in which lithium ions are removed from
the lithiated metal oxide cathode and put into the carbon anode.
The cell is then 'tested' by cycling it one or two times to
establish the nominal capacity at which it will operate (how
long it will work under a given current load). The consumer is
not involved in this process. There may be consumer operated
discharge mechanisms on the device (i.e., software initiated and
controlled discharge routines on a computer), but this is just
about the limit of consumer interaction with the battery.

The best advice: Sit back, relax and let the device control the
operation of the Li-Ion battery. This is why the Li-Ion system
has rapidly become known as, ounce-for-ounce, the most powerful
and trouble free battery in the world. Enjoy!

CAUTION: DO NOT ATTEMPT TO EITHER DISCHARGE OR CHARGE A LITHIUM
ION BATTERY BY ANY MEANS OTHER THAN THE DEVICE MANUFACTURER'S.


3. The Li-Ion battery system has a fair to good charge
retention. The battery will loose from 7 -10 percent of its
charge capacity per month on 'standby', 'inactive' storage. Of
course 'standby' and 'inactive' are relative terms. If the
device maintains any form of readiness during storage, this
readiness draws power from somewhere, usually the battery pack.
It's much like leaving a map reading light on in the car. Sooner
or later the battery will be affected by the low level drain. So
if your device (computer, camcorder or phone) isn't working as
long as expected after storage, check to see what is running while
the device is 'inactive'. (Some things you can control, some
things you can't.)


I hope my "clarifications" haven't muddied the waters.


A Side Note For Safety:
(To avoid temptations for amateur battery builders and/or
tinkerers, I haven't and won't detail the voltage limits and rates
required for the lithium ion systems. Li-Ion battery design and
construction is best left to the professionals.)

Note: This is a re-post of my article. I know it contains more
information than was asked for, but I just didn't feel like editing
it down to item no. 1. Besides it seems to be an appropriate time
to post it again.

Glenn

####################################################
# No one is responsible for anything I say but me. #
# (And sometimes I have doubts about myself.) #
####################################################

---

> > oplade 2-3x deres normale opladetid.
>
> Det vil sige, at mine li-ion batterier ikke har godt af at lade i 4-6
timer,
> hvis de f.eks. allerede er klar efter 2 timer?

Hvis du bruger den lader der følger med til Dit IXUS 400 så slår den selv
fra...
(Har selv et pragteksemplar af IXUS 400)

-Lars

---

Lars Dahl,

> Hvis du bruger den lader der følger med til Dit IXUS 400 så slår den selv
> fra...
> (Har selv et pragteksemplar af IXUS 400)

Jeg bruger selvfølgelig den lader jeg fik sammen med mit IXUS 400 kamera.

En af gangene lod jeg den lader i ca. 6 timer, men den blev ved at lyse
grøn - det er helt normalt?

/Glenn

---

On Wed, 16 Jul 2003 00:53:02 +0200, "Glenn Rasmussen"
<tyranno@mail.ikasths.dkREMOVETHIS> wrote:

>En af gangene lod jeg den lader i ca. 6 timer, men den blev ved at lyse
>grøn - det er helt normalt?

Ja, den lyser rødt når den lader, og grønt når den er færdig.

--

Med venlig hilsen
Kurt Brixen