identify component in li-ion battery circuit

Mark Rudisill's picture

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identify component in li-ion battery circuit
December 27, 2020 - 12:59am

I am workinh on a Hurricane canless air unit. The DC power jack shorted out against one of the battery straps, I ordered new batteries and it worked good untill I plugged it in then, all is dead. there are only 5 components to the circuit. An electric motor, battery pack consisting of 10 1.2 v cells an on of switch, a DC charging jack and the component that I need to identify. This component is wired in between the positive DC jack and the positive side of the battery pack. I have a picture but dont know how to attach it. I'm guessing this component is fried and has fried my new batteries  Thank you for the help

Mark Rudisill's picture

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OOPs.  well sorry this is a NI-MH battery circuit not Li-ion

 

Sourav Gupta's picture

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Best guess thats a diode... Can you share the image?

Mark Rudisill's picture

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I can't figure out how

 

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I think I figured it out, I belive the photo is in review

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I think I found out that it is a thermal limiter  I was mistakely searching for the numbe 8 instead of letter B  the part is TB08-BB8D. I'm not sure why this would cause an issue. I have drawn a circuit diagram. Be easy I'm a beginner LOL.  so as I stated in the beginning the positive side of the DC jack shorted againnst one of the battery groung straps and it stopped working. I replaced the batteries and wired it as it was and the motor worked fine till i plugged it in to charge, Then nothing the batteries are dead.  So what do you think I need to do to repair this. The theromal limiter is closed at the moment  TY Mark

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I also drew a diagram of the circuit, it is in review also  TY

Olivia Williams's picture

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The three primary functional components of a lithium-ion battery are the positive and negative electrodes and electrolyte. Generally, the negative electrode of a conventional lithium-ion cell is made from carbon. The positive electrode is typically a metal oxide. The electrolyte is a lithium salt in an organic solvent.

Sourav Gupta's picture

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Maybe it is a battery charger module board or inrush current limiter, waiting for the images.

Olivia Williams's picture

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The three primary functional components of a lithium-ion battery are the positive and negative electrodes and electrolyte. Generally, the negative electrode of a conventional lithium-ion cell is made from carbon. The positive electrode is typically a metal oxide. The electrolyte is a lithium salt in an organic solvent.