Nokia Battery pinout

[Heywood Jablome]

I'm after the pinout of a Nokia Lithium Ion battery. Part number BLC-2

Its the common one found in the 3350, 3315 etc. range of phones.

I see it has 4 pins. I wanted to build this battery into a circuit and
wanted to design an in circuit charger for it and need some basic charging
specs.

With the pages of crap I get when I google "nokia battery" or "nokia hack" I
have not found one good site with the specifications of this battery.

Any good leads?

 

[two bob]

I'm after the pinout of a Nokia Lithium Ion battery. Part number BLC-2

Its the common one found in the 3350, 3315 etc. range of phones.

I see it has 4 pins. I wanted to build this battery into a circuit and
wanted to design an in circuit charger for it and need some basic
charging
specs.

With the pages of crap I get when I google "nokia battery" or "nokia hack"
I
have not found one good site with the specifications of this battery.

Any good leads?

Yes, your multimeter leads.

 

[Heywood Jablome]

Yes, your multimeter leads.

OK Let's label the pinouts as ABCD. The battery is fully charged. So I
measure just over 4V between A and D. Between A and C I measure just under
4V. Could this be a reverse protection diode in circuit? Could it be a
thermal switch with near 0 resistance? I could speculate, but I dunno.
I do not measure anything between A and B. Can I be sure that there is
nothing connected to B? Again I am none the wiser.

As the battery is very popular I would assume that someone out there has
already done the hard work for me. That's why I ask whether anyone has come
across a website with the internal details.

 

[two bob]

OK Let's label the pinouts as ABCD. The battery is fully charged. So I
measure just over 4V between A and D. Between A and C I measure just under
4V. Could this be a reverse protection diode in circuit? Could it be a
thermal switch with near 0 resistance? I could speculate, but I dunno.
I do not measure anything between A and B. Can I be sure that there is
nothing connected to B? Again I am none the wiser.

As the battery is very popular I would assume that someone out there has
already done the hard work for me. That's why I ask whether anyone has
come
across a website with the internal details.

Forget the battery, why not check the charger you already have.

 

[Phil Allison]

"Heywood Jablome">

OK Let's label the pinouts as ABCD. The battery is fully charged. So I
measure just over 4V between A and D.

** The battery contacts are A & D.

Bet the polarity is marked in the plastic nearby as well.

Between A and C I measure just under
4V.

** The battery PLUS a series thermistor.

Could this be a reverse protection diode in circuit?

** No.

Could it be a
thermal switch with near 0 resistance?

I could speculate, but I dunno.

** That's for sure.

I do not measure anything between A and B.

** Now switch your multi-meter to ohms and probe between the contacts that
showed NO voltage reading

It will maybe read something like 50 ohms to 50 kohms.




............ Phil

 

[Tom]

I'm after the pinout of a Nokia Lithium Ion battery. Part number BLC-2

Its the common one found in the 3350, 3315 etc. range of phones.

I see it has 4 pins. I wanted to build this battery into a circuit and
wanted to design an in circuit charger for it and need some basic charging
specs.

With the pages of crap I get when I google "nokia battery" or "nokia hack" I
have not found one good site with the specifications of this battery.

Any good leads?

Two outside ones are + and - (marked on the label side). The other two
are for battery id (you can get BMC-3 which is NiMH in the same housing,
it works with the same phones). I've read some details about middle
terminals some months ago and don't remember very well. I think there is
a resistor between middle terminals with different value for BLC-2 and
BMC-3.

My own research - BLC-2 seems to have ~122 k resistor between the middle
terminals and nothing else while BMC-3 has ~39 k resistor between middle
terminals and a diode(?) between + and closest terminal - 0.37V one way
one no current other way.

I'll try to dig out the original info.

Tom

 

[matt2-amstereo]

he'd be better off with the ni-mh battery in my opinion, lithium
batteries are very picky about how they are charged and likely to go
bang in a bad way if handled wrong, however, you could use an old 3310
or equiv' to hold and charge the battery and just tap from it with some
wire.

highly recommend using the ni-mh version if you are going to charge with
simple stuff.

 

[Heywood Jablome]

Two outside ones are + and - (marked on the label side). The other two
are for battery id (you can get BMC-3 which is NiMH in the same housing,
it works with the same phones). I've read some details about middle
terminals some months ago and don't remember very well. I think there is
a resistor between middle terminals with different value for BLC-2 and
BMC-3.

My own research - BLC-2 seems to have ~122 k resistor between the middle
terminals and nothing else while BMC-3 has ~39 k resistor between middle
terminals and a diode(?) between + and closest terminal - 0.37V one way
one no current other way.

I'll try to dig out the original info.

Tom

Thanks Tom. I'll investigate that and see what resistance I get. What I am
also interested in is the charge rate, maximum allowed discharge rate and
other specs, so if there is a reasonably reputable web site with these
figures, that would be nice.

I am quite aware of the dangers of incorrectly charging/discharging lithium
batteries. The charge circuit that I plan to build within my device will be
microprocessor controlled with fail safes. Unfortunately the space
requirement does not allow for a mobile phone to be inside the enclosure.

 

[Michael C]

I'm after the pinout of a Nokia Lithium Ion battery. Part number BLC-2

Its the common one found in the 3350, 3315 etc. range of phones.

I see it has 4 pins. I wanted to build this battery into a circuit and
wanted to design an in circuit charger for it and need some basic
charging
specs.

With the pages of crap I get when I google "nokia battery" or "nokia hack"
I
have not found one good site with the specifications of this battery.

Any good leads?

Pull the battery apart. If you don't want to destroy your ask a phone shop
if they have any dead ones.

 

[Poxy]

Pull the battery apart. If you don't want to destroy your ask a phone
shop if they have any dead ones.

You're probably better off researching lithium ion chargers - I understand
their charging regime is different to NiMH and NiCad, and I'm fairly sure
that with the correct circuit you can charge them properly using only the +
and - terminals, so you don't really need to know what the other connections
are for.

 

[Michael C]

Forget the battery, why not check the charger you already have.

That would be the phone wouldn't it?

 

[budgie]

You're probably better off researching lithium ion chargers - I understand
their charging regime is different to NiMH and NiCad
correct

and I'm fairly sure
that with the correct circuit you can charge them properly using only the +
and - terminals, so you don't really need to know what the other connections
are for.

correct

 

[Stan Blazejewski]

Two outside ones are + and - (marked on the label side). The other two
are for battery id (you can get BMC-3 which is NiMH in the same housing,
it works with the same phones). I've read some details about middle
terminals some months ago and don't remember very well. I think there is
a resistor between middle terminals with different value for BLC-2 and
BMC-3.

My own research - BLC-2 seems to have ~122 k resistor between the middle
terminals and nothing else while BMC-3 has ~39 k resistor between middle
terminals and a diode(?) between + and closest terminal - 0.37V one way
one no current other way.

I'll try to dig out the original info.

Tom

The 2 center terminals 'should' be a temp sensor for use with a delta time/delta
temp charging system. Easy way to tell is if it changes when it's warmed up in
the hands or cooled in the fridge.
--

Australia isn't "down under", it's "off to one side"!

[email protected]
www.cobracat.com (home of the Australian Cobra Catamaran)
http://groups.yahoo.com/group/cobra-cat/

 

[Poxy]

The 2 center terminals 'should' be a temp sensor for use with a delta
time/delta temp charging system. Easy way to tell is if it changes
when it's warmed up in the hands or cooled in the fridge.

I know temperature change is often used for detecting end of charge for
NiCads, but is it also used for LiIon?

 

[Phil Allison]

"Poxy"

I know temperature change is often used for detecting end of charge for
NiCads, but is it also used for LiIon?

** If a sealed battery is fed with a continuous supply electrical energy
AFTER its charging reaction has been completed - what do you expect would
happen to it ???

Convert the energy into mass - maybe ???




.......... Phil

 

[Poxy]

"Poxy"



** If a sealed battery is fed with a continuous supply electrical
energy AFTER its charging reaction has been completed - what do you
expect would happen to it ???

Convert the energy into mass - maybe ???

You are right - the energy has to go somewhere - obviously in increasing
mass... But in my admittedly limited experience with lithium polymer
batteries, my charger doesn't use temperature sensing. I'm wondering whether
temperature change is customarily used in consumer devices like mobile
phones.

In my case, the charger tapers the charge current, which I assume means some
kind of constant-voltage charge.

 

[Phil Allison]

"Poxy"

Phil Allison wrote:

You are right - the energy has to go somewhere - obviously in increasing
mass...

** Whooosh ...............


BTW

Batteries are CHEMICAL machines - not electronic components..

They are products of the CHEMICAL engineering industry.

Very bloody secretive.

Very bloody weird stuff.

Full of outrageous scams.

See my contributions to EA magazine re: the great DSE Ni-Cd fraud .





........ Phil

 

[budgie]

Stan Blazejewski wrote:

I know temperature change is often used for detecting end of charge for
NiCads, but is it also used for LiIon?

NO!

 

[Phil Allison]

"budgie"

"Poxy"


NO!

** The topic deserves more than one word and there are plenty on the net:


Eg http://www.powerstream.com/li.htm




........... Phil

 

[Heywood Jablome]

I have looked into charging lithiums. The general practice is to hold a
constant current till the battery reaches 4.2V, then taper off the current
and hold the voltage at 4.2V till the charge current is under 10% of what it
initially started at. Then switch off. (no trickle charge)

It would still be nice tho to find a web page of someone who has already
done something like this. I'm sure they have and I'm sure there is a web
site that describes it but its a shame that these phones and batteries are
so popular that every site I find using google is one that wants to sell me
nokia accessories!!!

For the record I'd prefer not to open the battery so I would still like to
know for sure what is connected to the other terminals and other specs.
including charge current etc.