How to know whether the capacitor get toasted?

[tigershark1976]

just did some did and tested my DIY VS using 12v batt. everthing is o.k, LED indicator light off when charging and on when fully charged. when removed the power supply (12V battery), the LED remain on... let the VS charged overnight to further test on it... In the morning, found that 1 of the 4700uF capacitor exploded and oil look alike liquid came out...

test the VS with the damaged capacitor on and the LED doesnt light up both before and after charging like before...

Will be removing the damage capacitor tonight but wondering the rest of the capacitor are affected as well?? how to test it? I have a multimeter on hand (pls explain in detail cos im quite a greenhorn in electronic stuff)

 

[kww]

I assume you connected all your capacitor in parallel, solder all capacitor on a circuit board properly and has a fuse in series close to +ve supply line. A blown capacitor wouldn’t affect the other caps. Since now it is totally not working, this mean a cut-off along the line, most probably is the fuse. Else it might be all caps gone, lose join, wire burnt…

 

[minikar]

Are you sure the LED is not blown as well?

 

[tigershark1976]

No fuse, my mistake actually, its not charged using 12v batt, its just a 9V square batt that we buy from shop... thats y the fuse is not installed yet.

LED not blown, just checked the VS again and it works... without removing the blown Caps, after charging for 5 mins, the LED is able to lighted up for more than 1 min.

think i will remove the blown caps 1st and replace it with a wire.

 

[acbc]

If caps kaput... the smell is like a dead fish.

 

[tigershark1976]

If caps kaput... the smell is like a dead fish.

hahaha.... bro, dun like that leh... i dun wan to test 20 over pcs of capacitor by smelling each of them... I mean, no hard feeling but is there other way to test it??

 

[minikar]

U sure all thise caps r in parallel? if so why u hv 2 replace wif a wire hmmmm

If in parallel that mean u r shortcircuit the thing

If series, then u start on the wrong foot.

 

[tylaxng]

yo.. bro.. i think u already done ur "ICE" cap... seems like u face some problem...

Series wont let ur cap blown... js let ur capacitance
This is 2 possible let ur cap blown:

1. Ur cap polarity wrong.... ex: should be + but u connect to -

2. Quality... if ur problem it's this 1, ur other caps will face same problem also...

p/s: do u mind post ur VS photo... easy find out the problem....

 

[Maxx]

make sure ur caps also can support at least 16v or preferbly 25v.
voltage above max caps rating will explode the cap also.

and all caps must be connected parallerly.

all caps positive (+ve) legs connect to +ve (joint all +ve caps leg together). then to fuse -> cable terminal +ve

negative (-ve) caps legs also do the same. joint -ve legs together then to cable terminal -ve.

 

[tigershark1976]

hey bro, thanks for the reply

not done yet, my ICE caps is divided into 4 parts, cos i'm using name card box to box the "ICE Caps", will connect all the 4 together when it is done...

... confirm nothing wron with the connection, guess its the quality instead...

most of my caps are 16V rating, except for those small farad rating... 25V or 50V