Tesla Model 3
The fourth explanation of this lesson,so we now have our two cables from the charge receptacle plugged in all right now let's look at the output here of this charger module okay so these two holes on this side of our onboard charger module is the output for our DC power and they remember we just plugged in an external charger to charge the battery they need to somehow connect to the battery
Method for connecting cables to the battery:
so let me show you the next uh two cables that plug in here and how they connect to the battery and then we'll make the connection okay the two cables that go from the onboard charger module to the battery to charge it have to go through here are the two cables they have to go through this part right here called the rapid splitter split splitter the rapid splitter brings the two cables in from the onboard charger and it connects them directly to these two big terminals right here that plug into the top of the battery now if you look at this photo right here from a used battery on ebay you can see right where they plug in there's a guide pin right here there's another little tiny pin right here it's probably an interlock circuit or maybe a common chassis ground between the two i don't know i once again i don't have a schematic in the tesla service information that I've seen doesn't show schematics this box just think of it as a giant junction block it has it it has the connection to the battery so think of these two terminals as being connected directly to the battery this one here on the left is battery negative one on the right is battery positive so those two connect to these two cables the one with the black tape on its battery negative the one with the red tape on it is battery positive and so that comes directly from the charger but then here on the other side of the rapid splitter we have a big long connection that goes to our rear drive unit the rear electric motors inverter and then we have a really long uh set of cables that goes clear up to the front of the vehicle where there are all kinds of parts up front that we have to go look at and connect them to this same cable assembly but I just wanted to quickly take this cover off to show you that this is nothing more than just a junction block there's no fuses in here so we have battery negative coming in over here on the left, it comes right up this insulated uh bus bar and then goes back out where we have battery negative over here and battery negative down here and it goes straight out the back to the battery negative going to the onboard charger module and then battery positive comes straight up back behind connects right here to this cable for the inverter to the lower cable to go up front and straight out the back to go to the onboard charger module so this is called the rapid splitter I think it's because it allows the battery to be lowered down and rapidly split or disconnected I don't know that's just my best guess as to why it's called the rapid splitter but I know when you go back up in everything has to be aligned just perfectly from some of the videos I've seen with disastrous results if they weren't aligned so that is the next high voltage component here the rapid splitter .
The way the rent distributor works:
so we have two cables from the onboard charger module to the rapid splitter they're about 41 inches long just a little over a meter 1.04 meters in length now let's connect them to the onboard charger module and then we'll move down the line and connect everything else the negative cable output goes in the bottom hole over here okay now that we've got the cables from the onboard charger module to the rapid splitter connected I'm going to put the cover back on the onboard charger module because these cables actually fold and go back over the top of the onboard charger module in the vehicle so I'm just going to set this on here I won't bolt it down I broke my little cover here headed on and off too many times we'll put this other cover on this big cover does not need to be removed to change to disconnect and reconnect these cables just this little cover and the little plastic covers inside so that's going to sit just right there so I'm going to position this the way it is positioned in our vehicle under the back seat so if this is the front of the car this is the back and our see the fourth explanation of this fifth,rapid splitter right here actually sits.