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| tesla car |
The third explanation of this lesson, cutting off the power to all these high voltage cables that we are talking about here, so when you shut down your car, the high voltage connectors should also shut down in an accident, they shut down if you open the interlock it should also shut down well.
We have a plastic cover here to make the connection from our charging case cables to this charger unit, and then this is the output where we have DC cables coming out DC power so I have removed all the screws from this cover so let's lift this cover and see what's inside here for the two cables to come in. From our shipping container it's down, and there's a nut in there and a nut there where it's screwing down.
Correct voltage meter to enter current:
Since this can have an AC voltage on it or a DC voltage, this unit must be ready to convert the AC voltage to DC or to skip the switch and send the DC voltage directly from the DC to the battery so let's talk about the h-AC voltage So with the two wires coming from our charging receptacle, they come and go to these two rods and they connect here on these two pins, and here on these two screws and the ones connected to the parallel circuit boards here, each of them includes a 24 amp AC-DC converter, our power. Coming from AC power is usually 240 volts maximum but we need it to charge a 400 volt battery, so we don't have to just convert it to DC voltage we have to go up this voltage and so between the end of the board and the end of the board and there is a bunch of things underneath it also it all happens, So if this is a 48 amp charger, I think 24 of those 48 go through this board 24 go through this board, if it's a three-phase AC power input I think there will be one in the middle uh in European countries and then they call It's all here on the other side where we have 400 volts or whatever. Up to 430 I think DC output where they connect together in bus rails and they come here to these two terminals, there are two holes here where DC power leaves this compact charger unit having been converted from AC, so this is the conversion of AC to AC that we're talking about Here but what if it's really DC now, I don't know and maybe you can tell me in the comments whether it's the onboard charger unit that decides whether it's AC or DC or is there some external computer that decides if it's a current AC or DC I don't know I can't access the wiring diagrams for our car if it's DC, I know this if the two cables connected here have DC power from supercharger, Tesla charger, then we have two connectors we have a negative DC power charger connector here and a positive connector Here and what that means is the next power if it is really DC.
Converting AC to DC:
These two conductors that act like gigantic switches turn off and transmit the conduction of that power directly to the output by when all this conversion is passed from AC to DC, the voltage is already high enough from the supply voltage of the supercharger, so we don't use AC-to-current conversion. We only run these conductors or high voltage relays as some people call them. Transfer this high voltage from here, so let's connect the two cables coming from our charger receptacle, then we will connect the two outer wires and see where they go next. Well, here comes two high voltage cables in this demo of this video that I should have made clear that there is no high voltage in anything so I don’t wear HV gloves or PPE, I don’t use insulated tools but if I do That is in the car on a real vehicle, there are all kinds of personal protection tools isolated to the equipment and service procedures for safety that you will need to follow properly because I am connecting these cables, I forgot to explain to you a N there is a small switch I don’t know if you can hear the hat which is a lock switch, remember we talked about the interlock circuit, so if any of these cables are disconnected it opens the interlock circuit and kills the high voltage of the whole vehicle, all these nuts and bolts have torque Specific I will not go to animate it in this demo. See the fourth explanation of this lesson.