Cooling Box

[Tarant]

Would this work without any problems, I am planning on attaching the charger and a power supply to the container and putting a fan on one end. That way all my stuff will be in a nice little box and will stay cool while chargering. I am not planning on turning up the amps to charge things faster just keeping things cool.

So will this hurt the charger or battery.

Thanks

 

[Clintd]

The only problem I would see is that the battery's get hot from the inside out.
So even if you get the external temp down, there is still a chance that they might explode if overcharged or charged to quickly after a discharge.

 

[Tarant]

True, However that could happen without a fan.

In my head I am just trying to keep the batteries from getting to hot during a charge, and not needing to wait the long time after a charge to use the battery.

 

[SIRMAXXALOT]

Cooling batteries while charging is BAD....cooling the batteries during charging will cause them to overcharge. However cooling your charger is always ok.

 

[Plaidfish]

cooling the batteries during charging will cause them to overcharge.

How do they overcharge by keeping them cool?

 

[godale03]

How do they overcharge by keeping them cool?

I also would like the answer to this one... Do chargers determine peak by temp, instead of voltage? Don't mean to ask a stupid question.

Tom

 

[SIRMAXXALOT]

I guess I am not a 100% positive but it has to do with the batteries building up heat is part of the internal resistance is part of the peaking process--heck I wish I could explain it better but I know it isn't good- it is ok to cool them after they are discharged and/or trayed.. I guess the older 3300's and older batteries it does not matter as much but it still is not good for them but the 4200's it is extremely harsh on them and could cause to explode when charging beause it is changing the internal resistance and not letting the charger find it's peak and with chargers with temp probes it should be kind of obvious that the two would clash. I am not all knowing when it comes to batteries but I got a couple of buddies who are electric racing guru's and I translated into plain folk words the best I could--all I know is I was yelled at by them when caught doing the cooling of batteries during charge--they said it is only ok after the discharge and/or traying of the battery BEFORE it is charged.

 

[sweetdiesel]

It's a possibility of overcharging if delta V is set too high and if you depended on the pack temperature to indicate when a pack has peaked. I like to use 110-112 degrees F as a good indicator for when a pack has reached a full charge.

 

[godale03]

Thanks for the info guys!

Tom

 

[Tarant]

Well that does make some sense. Well if it is okay to cool them after I guess that is what will happen.

Thanks.

One other thing, Would the charger be hurt or cause problems if it was cooled. My charger doesn't get hot only warm. And I will be modifing the box so i can put a ST on it to cool the motor after a round of racing. And if all this stuff is together I wont lose anything.

 

[SIRMAXXALOT]

Well that does make some sense. Well if it is okay to cool them after I guess that is what will happen.

Thanks.

One other thing, Would the charger be hurt or cause problems if it was cooled. My charger doesn't get hot only warm. And I will be modifing the box so i can put a ST on it to cool the motor after a round of racing. And if all this stuff is together I wont lose anything.

It is good to cool your charger, the higher end chargers will come with fans in them-even some of the mid to lower line ones do but yes it is healthy to keep that charger nice and cool.