I
ian field
- Jan 1, 1970
- 0
Before I blow myself up - what is the simplest safe charger design for
Li-ion cells?!!!
TIA.
Li-ion cells?!!!
TIA.
ian said:Before I blow myself up - what is the simplest safe charger design for
Li-ion cells?!!!
TIA.
Mr. Wizard said:Texas Instruments has Benchmarks line of gas guage and charger I.C.'s
for Li+ batteries. They are fairly simple to use and should save you
the trouble of blowing things up.
A plethory of stuff at LinearBefore I blow myself up - what is the simplest safe charger design for
Li-ion cells?!!!
TIA.
martin griffith said:A plethory of stuff at Linear
BTW dont put a Sony label on it
martin
ian said:I wasn't going to put any label on it - why particularly not Sony?!
Besides - I thought it was Dell laptops leading the way in using Li-ion
batteries as incendiary devices!!!
Get a RS or farnell account, fake some letter heads, as long as youNot having accounts with any trade suppliers unfortunately limits me to the
rather meagre range of semiconductors stocked by Maplin - and whatever I can
skip raid!
ian said:I wasn't going to put any label on it - why particularly not Sony?!
Besides - I thought it was Dell laptops leading the way in using Li-ion
batteries as incendiary devices!!!
ian said:Before I blow myself up - what is the simplest safe charger design for
Li-ion cells?!!!
TIA.
dated Fri said:Not having accounts with any trade suppliers unfortunately limits me to
the rather meagre range of semiconductors stocked by Maplin - and
whatever I can skip raid!
John said:RS (in UK, not Radio Shack) will take credit card orders on the Web. So
will Rapid. Farnell will, but only for orders over a value which I've
temporarily forgotten.
ian said:Before I blow myself up - what is the simplest safe charger design for
Li-ion cells?!!!
ian said:Before I blow myself up - what is the simplest safe charger design for
Li-ion cells?!!!
TIA.
Get a RS or farnell account, fake some letter heads, as long as you
pay by credit/debit card no probs.
BTW where are you based?
martin
John Woodgate said:RS (in UK, not Radio Shack) will take credit card orders on the Web. So
will Rapid. Farnell will, but only for orders over a value which I've
temporarily forgotten. There are other suppliers, too. Get a copy of
'Television' magazine.
Mark Fortune said:Sony make the batteries for Dell and Apple laptops which have recently
been in the media recently for removing eyebrows.
Michael A. Terrell said:They were made by Sony, for Dell, but they have no indication that
they are made by Sony, unless you enter the code numbers on Dell's non
working battery recall website and it spits out a recall notice. All I
ever get is "Server not found", but I have at least one battery involved
in the recall. Sony also made the battery packs for Apple that are
being recalled. I've pulled the batteries out of all my newer laptops,
just in case.
BTW, on the TV news out of Orlando a couple days ago they reported on
a Dell laptop that caught on fire in the cab of a big pickup truck. The
moron threw it into the back of the cab where it set the truck on fire.
His excuse was that he just wanted to get it away from his daughter. I
would have either thrown it out the window, or pulled off to the side of
the road and set it off in the dirt to burn. Tourists!
--
Service to my country? Been there, Done that, and I've got my DD214 to
prove it.
Member of DAV #85.
Michael A. Terrell
Central Florida
Chris Jones said:Go to the website of the battery cell manufacturer and get the datasheet.
If you don't put several cells in series but rather just use one cell,
then
you should be able to get away with just a current-limited constant
voltage
power supply, but some kind of redundant circuitry to disconnect the
battery if the charger develops a fault might be needed depending on where
the thing is being used. You must make sure that you don't charge the
battery above a certain voltage (about 4.2V but read the datasheet) nor
discharge it below another certain voltage (again see datasheet). If you
want to float-charge a lithium cell then the voltage is supposed to be a
bit lower than the value used for cyclic charging and discharging. You
should consider the likelihood and consequences of any component failing,
and I would choose to put the battery in a substantial diecast metal box
in
case it catches fire anyway.
Chris
ian field said:Recently I heard RS had waived the requirement to be an account holder, so I
emailed them and they sent me the CD cat. As I wanted some LEDs I logged on
to view the data sheets before deciding which ones to buy and their system
refused me access! They ignored my email asking about this so I didn't
bother with them anymore!!!