Maxamps water cooled lipo packs

[lincpimp]

Originally Posted by E-Revonut

Not to side with MA but I think this actually makes sense. If anyone remembers when the E-revo first came out there was a lot of concern about the lipos being sealed and not getting any airflow to help keep them cool. Those concerns where justified and warranted, many people had issues including me. I modified the air intakes on the battery compartments and it helped by allowing air to flow over the batteries more easily. In a boat there is ZERO airlow and no way to get airflow. Even a fan would only circulate hot air over them. The constant current draw in a boat puts a huge load on batteries and they get warm, keeping them cooler would be better for them. However cooling batteries to mask the fact that they aren't capable isn't going to help but keeping an adequate lipo cooler should be better for it.

I have to disagree. If you use the correct spec lipo for your boat esc/motor/prop setup you will not need to have water cooled lipos. battery heat indicates you are placing too much load on the battery, so you either need to prop down, or use a larger/better battery, or run a 2p setup.

Water cooling may help mask a problem, but the problem is still there.

I equate this to running a feigao in a boat. They work fine, and do not get hot sue to being water cooled. But they are still in-effecient, and will not have the runtime that a neu will. The water cooling keeps them at a safe temp, but does not improve the motor design.

My freinds and I have been running the 40c sky lipos in all of our boats, 4000mah and 5000mah packs. They work great, and if your boat is setup correctly they only get up to around 115-120f after a full run.

[RC toy]

Originally Posted by lincpimp

Water cooling may help mask a problem, but the problem is still there.

But it doesn't apply to motors, does it? What about car motors? Do I increase the efficiency by cooling it with a fan or the magnets still dissipate the same amount or power as heat?

Originally Posted by BrianG

lipos are fairly temperature sensitive. Too cold and they run like crap. Too hot and the life is shortened. Much easier to use a proper pack for the application.

So what's about the perfect temperature for lipos?

[BrianG]

Originally Posted by RC toy

But it doesn't apply to motors, does it? What about car motors? Do I increase the efficiency by cooling it with a fan or the magnets still dissipate the same amount or power as heat?

Motors dissipate the same amount of heat regardless of any type of cooling. Actively cooling a motor can help shed that heat to prevent it from building up to the point where magnet damage can occur. However, if a quality motor is used, efficiency is higher, and there is less wasted heat to begin with.

Using a fan to remove motor heat is not a good idea if that is the only way to run it without having it overheat. The motor should be able to run without added active cooling with no problems. If not, the the motor is too small or simply wrong for the application.

Originally Posted by RC toy

So what's about the perfect temperature for lipos?

IIRC, right around 90-95*F.