Diagnosing a fault on a 18volt lithium Ion charger

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peterhull

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I bought a used Wolf pole saw recently with an 18 volt lithium Ion battery and charger. The battery is fully charged but the charger is dead. I have checked that it is receiving 240 volts at the circuit board but there is no output. The battery has 6 cells in series.

The battery has 3 terminals labelled positive, negative and T. I guess the T terminal is something to do with balancing the charge. I have a sophisticated charger IMAX B6 AC which can be used to charge all sorts of batteries. I tried to programme it charge the battery but it came up with an error code ' connection error. I only used + and - terminals.

The IMAX charger has a balancing connection for charging 6 cells. I really need to advice on how to make up a connection system from my IMACS charger to the existing battery in order to charge it properly without error messages. Would appreciate any advice please.
 
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KlausST said:
Hi,

I don´t understand what you expect the chargers to do ... with a fully charged battery.
I´d say they do a good job when they do nothing.

BTW: I guess the "T" terminal is a temperatur ensor.

Klaus
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Thanks Klaus but the existing charger doesn't work and is probably I think is obsolete. I need to be confident that when the battery is discharged that I can charge it again hopefully with my imax charger.

I guess if could diagnose the fault on the Wolf charger I could use that but I don't have enough knowledge to fix it.

When I have used the Imax charger to charge Lipo batteries in past it requires a balance lead but I don't have a balance lead with this Lithium Ion battery.

The charger gives me a connection error message not a fully charged message. I therefore conclude that it needs an extra connection via the T terminal on the battery.
 

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Hi,

you talk about several chargers now. Please clarify:
* How many chargers do you talk about.
* is the "existing charger" the "Wolf charger" or the "imax charger" or anotehr one?
(to avoid confusion I recommend to use one unique name for one charger)
****

"The existing charger does not work". So you bouth it as "defective charger", or you tested it (if so, how?), or you just guess that it is defective.
****

I´m relly confused. You say you "hopfully can use the imax charger" but the next sentence you talk about the "Wolf charger". Please choose which one you prefer, then let´s focus on this charger.
****

You say "The charger gives me a connection error message". Which charger? What setup/connections/battery state?
****

I recommend to go on step by step. Focus and discuss one problem per post.

Klaus
 

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The Wolf charger came with the Wolf Saw. The Wolf charger is faulty.

As I have another sophisticated charger the IMAX I thought I may be able to charge the existing Wolf battery using this charger but this doesn't work when I connect the + and - terminals only. The battery has 3 terminals so it needs another connection to the IMAX to balance the charge I think
 

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Hi

No answers.
I don´t know where your focus is.
No clear question.

I think you need someone else to discuss further.

Klaus
 

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