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Using graphene for heat dissipation in a battery

Using graphene for heat dissipation in a battery

With graphene being a good conductor of heat, I wonder if it could be included inside a Lithium Ion battery to conduct away excess heat into a heat sink - dissipating heat faster and reducing the risk of burning even when charging faster.

I wonder also, if with a large battery made up of many smaller cells, whether you could use it to cover the outside of the cells to help with heat dissipation or rapid cooling of specific areas if there is damage (targeted cooling would probably require some moving parts). Considering the risk of burning from damage, I wonder what you could use outside to retard reactions when a cell is broken and exposed to air.

joel.bennett | 12 juin 2014

Well, something to consider is once you get the heat out of the batteries, it still has to go somewhere. Chances are, you'd either end up using air or liquid to wick the heat away. Although graphene is very good at conducting heat, it'll only get the heat so far away.

Brian H | 13 juin 2014

Yeah, when it comes to thermal transfer, conduction and convection of liquids trump conduction.

khurrum_mahmood | 23 juin 2014

Yes, you'd need to transfer the heat somewhere, but as long as you can conduct it away from the battery to a heat sink that can get rid of it, that should help the performance of the battery itself.

A car has plenty of space to work with, for methods to get rid of that unwanted heat.

Detroit SuperCharger | 23 juin 2014

Couldn't the whole vehicle body act as a heat sync? Or does it already?

khurrum_mahmood | 24 juin 2014

I think you could use the body, or refine some of the design to make it work more easily as a heat sink, but I don't think that people are actively trying to bleed away heat problems of a battery that way.

Of course, this was just an idea that I wanted to share in case someone hadn't looked at this angle. People are trying graphene in batteries for other purposes, but heating issues are a serious problem, and graphene has recently been discovered to have really cool properties for conducting that away... So it could be a solution to some common battery design issues in that regard.

khurrum_mahmood | 24 juin 2014

... and might help improve how fast you can charge batteries, and how often you could charge them.

Red Sage ca us | 24 juin 2014

Then the body of the car would get hot... You'd have to make it of bare metal... Or only use extremely thin, dull paint... Tesla's cars already have the best battery pack cooling system on the planet, and are likely to get better as time goes by.