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Old Jan 01, 2011, 01:59 PM
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Question
Chips in batteries, what do they do?

About a variety, cellphones, laptops, and I believe some TX batts have chips too. Very likely they're safety circuits, but what exactly do they monitor and how do they interfere. Do they reset? Could they provide genuine brand protection? How smart can they be? Thx in advance, Jurgen.
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Old Jan 01, 2011, 03:12 PM
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United States, NJ, Frenchtown
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The only purpose for them in there is

to prevent the cells & battery packs from being abused by RC electric flight people.

No lie.
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Old Jan 01, 2011, 03:14 PM
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Also some are LIPO cells and need fully automatic protection during discharging & recharging.
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Old Jan 01, 2011, 03:16 PM
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Toronto (Don Mills), Canada
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My Sony Camcorder has a smart chip in the battery.
What it means to me is that I can only use genuine Sony batteries

Most consumer Lipos have cell protection circuits on them to prevent over discharge and overcharge.

Pat MacKenzie
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Old Jan 01, 2011, 05:09 PM
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United States, CA, Bear Valley Springs
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Quote:
Originally Posted by cyclops2 View Post
to prevent the cells & battery packs from being abused by RC electric flight people.

No lie.
Suuuure. Like they worry about us to the point where they spend $$$$$ to just screw us up. Get real, man. No lie.

mw
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Old Jan 01, 2011, 05:44 PM
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That safety chip is there to prevent us from pulling to much amperage & damaging the cells.

No lie
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Old Jan 01, 2011, 06:06 PM
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Quote:
Originally Posted by Jurgen View Post
About a variety, cellphones, laptops, and I believe some TX batts have chips too. Very likely they're safety circuits, but what exactly do they monitor and how do they interfere. Do they reset? Could they provide genuine brand protection? How smart can they be? Thx in advance, Jurgen.
Very smart!
They are called PCMs. Protection Circuit Module.

Read about them-
http://www.master-instruments.com.au...0batteries.htm
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Old Jan 01, 2011, 07:27 PM
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Remember when laptop batteries were bursting & catching fire ?

Well Sony and a lot of other battery companies had a big legal problem coming at them from everybody at the same time.

So they quickly hit the " Do it right. Screw the cost. " Button.

Amazing how fast progress can occur, when you are faced with a potential of millions of lawsuits.

Result was the P C M & other catchy named systems. It worked beautifully.
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Old Jan 01, 2011, 08:16 PM
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Quote:
Originally Posted by pmackenzie View Post
My Sony Camcorder has a smart chip in the battery.
What it means to me is that I can only use genuine Sony batteries

Most consumer Lipos have cell protection circuits on them to prevent over discharge and overcharge.

Pat MacKenzie
Or My Nextel work phone only charging from a Motorola brand charger. @(#*@^
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Old Jan 02, 2011, 01:39 AM
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Quote:
Originally Posted by hoppy View Post
Very smart!
They are called PCMs. Protection Circuit Module.

Read about them-
http://www.master-instruments.com.au...0batteries.htm
You may find them easier if you look for them as a BMS, Battery Management System.
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Old Jan 02, 2011, 10:23 AM
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Are these why my cell phone battery has 4 contacts on what appears to be a single cell Li-Ion?
If I want to do a manual charge which contacts do I use?
Thanks,
KW_Counter
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Old Jan 02, 2011, 10:39 AM
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Originally Posted by kw_counter View Post
Are these why my cell phone battery has 4 contacts on what appears to be a single cell Li-Ion?
If I want to do a manual charge which contacts do I use?
Thanks,
KW_Counter
Sometimes the extra contacts are used for an internal temp sensor.

IMHO, stick with the stock charger and avoid any future problems.
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Old Jan 02, 2011, 11:43 AM
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Quote:
Originally Posted by philipa_240sx View Post
Sometimes the extra contacts are used for an internal temp sensor.

IMHO, stick with the stock charger and avoid any future problems.
Philipa,
Generally, I agree with you.
However, I am having some trouble with this battery.
It was on the charger 2 days before reading charged.
I got the phone used and a replacement battery is on its way.
I was considering using one of my chargers to cycle the
battery and see if it is bad or just needed multiple charges.
Thanks for the reply,
KW_Counter
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Old Jan 02, 2011, 09:16 PM
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just use a multimeter to work out what the polarity and charge away.

I used to charge my e71 with an accucel-6 at the field like this. paperclip into the tabls and croc clips onto the paper clips if you know what i mean
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Old Jan 03, 2011, 06:44 PM
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Great info inhere, thanks, they really made miniature wonders.
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