Author Topic: high voltage corrosion damaged PCB ultrasonic cleaning solvent?  (Read 307 times)

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Offline coppercone2

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I have a 120V HV battery which has been damaged by water (drip from upstairs cleaning).

I thought the charger got damaged, replaced the charger, then found out that the battery is taken apart easily with four screws. The PCBs are not conformally coated... anyway I think what happened is the water got under there and shorted some stuff out and electrolysis corroded the copper into the greenish oxide.

It was not charging at all, but I gave it a good cleaning by scrubbing vigorously with a nylon brush while spraying it with contact cleaner.

It charges about 1/2 way now. Some of the components might be damaged, but anyway It seems the more I clean it, the further it charges. I was thinking of desoldering the PCBs and cleaning them in a ultrasonic.. but what cleaning agent is good for this kind of cleanup?

Can I ultrasonic it in vinegar? It does look suspiciously clean at this point though.
 

Offline coppercone2

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Re: high voltage corrosion damaged PCB ultrasonic cleaning solvent?
« Reply #1 on: August 29, 2019, 06:40:48 am »
and, any idea what

vfy326 ic is? I know its a charge protection chip, but where can I buy a few? The one I have is missing a leg now that I look very closely.  |O
 

Offline PKTKS

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Re: high voltage corrosion damaged PCB ultrasonic cleaning solvent?
« Reply #2 on: August 29, 2019, 11:22:21 am »

In your region (US) it is easy to find a proper solution

Search for BRANSON chemicals solutions for ultrasonic bath

Paul

 


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