so in the last video you saw us connect a bunch of batteries together and get the motor spinning a huge milestone when building an ev we have disassembled that and today we're going to build the battery boxes the correct way and mount them in the passenger locations behind the driver and shotgun plus we'll be talking about the NUMBER_TOKEN volts worth of batteries that we'll be putting in those boxes right around NUMBER_TOKEN kilowatt hours it's a lot of power and remember as i talk through this video i'm not an expert in any of this i'm just taking what i read on the internet and learning as i go so take anything i say at your own risk and you should probably double check everything so throughout all my videos you've probably seen these NUMBER_TOKEN tesla battery modules spread out all over my workstation each of them store about NUMBER_TOKEN kilowatt hours worth of energy and when i say kilowatt hours it just means NUMBER_TOKEN NUMBER_TOKEN watt hours worth of energy one kilowatt is NUMBER_TOKEN watts each module is made up of NUMBER_TOKEN NUMBER_TOKEN cylindrical cells these super shiny things you see inside of the battery modules and when all these little cylinders are connected together my hummer will be running on NUMBER_TOKEN tiny batteries there's a metaphor in there somewhere about little things working together to accomplish great things anyway when we do the math NUMBER_TOKEN battery modules at NUMBER_TOKEN kilowatt hours each we end up with NUMBER_TOKEN kilowatt hours of usable energy which is the exact same battery pack size that we see inside of my wife's model x and what's interesting is is that my wife's model x and my military humvee are gonna weigh about the same when i'm finished it's helpful that my military humvee is pretty bare bones and the entire outside is made from aluminum the cool thing is that each one of these NUMBER_TOKEN little cells are held together with an astronomical amount of glue and metal plus each one individually has a tiny little wire attaching it to the whole module and that little wire is a fuse so if too much current flows from that little battery for too long the fuse breaks separating it from the module and helps prevent thermal runaway tesla says that their electric vehicles are NUMBER_TOKEN times less likely to have a vehicle fire than gas-powered vehicles and that's in part due to all the safety features built into the battery module and that gas power vehicles literally run off of explosions and even though i'm using tesla battery modules in my electric humvee i can't promise that my ev is NUMBER_TOKEN times less likely to catch on fire mostly because i built it here in my garage but it is nice to know that there is safety built into the modules that i'm using as a little side note what's inside actually did take one of these modules and threw it off of his roof hitting his driveway and the thing mostly stayed together so their durability has been tested and is very substantial long story short i'm not worried about their durability especially because we have this as you can see on the back of all of these modules we actually have liquid cooling tubing that runs in between all of the cells to help keep the cells cool while they're under load lithium likes to operate in the same temperature range that humans like to operate which is why we have liquid cooling for the batteries and most electric vehicles also have battery heating for operation and cold environments mine doesn't
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