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Old 26th October 2009, 11:19 AM   #1
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Default Li-ion BATTERY,, 3.7V,1400mAh

Li-ion BATTERY,, 3.7V,1400mAh,1 CELL,CYLINDER, model WBA-L1850A.
3 wires 1 red and 2 black
Volts across red and black(any) 3.6 volts. any idea why 2 black wires ?
is it for charging and other for load ?
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Old 26th October 2009, 11:28 AM   #2
Magura is offline Magura  Denmark
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Quote:
Originally Posted by sivan_and View Post
Li-ion BATTERY,, 3.7V,1400mAh,1 CELL,CYLINDER, model WBA-L1850A.
3 wires 1 red and 2 black
Volts across red and black(any) 3.6 volts. any idea why 2 black wires ?
is it for charging and other for load ?
Temp. control during charging.



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Old 26th October 2009, 11:36 AM   #3
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ok thx for the quick reply !!! how do i use the battery as a source..i have built quite a few number of li-ion chargers..i wish to have the internal schematic of the so called temp controller
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Old 26th October 2009, 11:38 AM   #4
Magura is offline Magura  Denmark
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Originally Posted by sivan_and View Post
ok thx for the quick reply !!! how do i use the battery as a source..i have built quite a few number of li-ion chargers..i wish to have the internal schematic of the so called temp controller
The temp controller is just a thermistor. Nothing fancy. You can just dismiss it, unless you plan to charge it harder than 1C.


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Old 26th October 2009, 02:29 PM   #5
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It is always a good idea to use the temperature sensor to prevent thermal runaway.
This is what happened to an EV pack after thermal runaway:
Click the image to open in full size.
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