External Power Connection, Jump Starting

Information 

• If the battery in a BEV vehicle is flat, jump leads and a removed 12-volt lithium-ion battery can be used for jump-starting or supplying external power  .

Prerequisite for external power connection, jump-starting: The flat battery must be properly connected to the vehicle electrical system.

1. Removing water box cover.

   > 852219 REMOVING AND INSTALLING PLENUM PANEL COVER - on "Removing"

2. Remove protection cap on positive terminal of the external power connection -Arrow-  .

   Courtesy of PORSCHE CARS NORTH AMERICA, INC.

   Protection cap on positive terminal for external power connection

   CAUTION: Irritant gas leaks due to damage to the 12-volt lithium battery 

   • The use of unapproved chargers or boosters can cause the 12-volt lithium battery to be charged at too high a charge voltage and too high a charging current. This can damage the 12-volt lithium battery and irritant gases can leak out. Risk of serious damage to the vehicle and burns  .
     • Only use chargers or boosters approved by the device manufacturer for LiFePO₄ batteries with integrated protection electronics.
     • Never exceed the following maximum values:
     • Max. charging voltage 14.4 V (also in case of fault with disconnected 12 volt lithium battery; no voltage peaks permitted)
     • Charging current max. 90 A
3. Connect the positive cable to the positive terminal of the flat battery first, then to the positive terminal of the donor battery.
4. Connect the negative cable to the ground point of the external power connection first, then to the negative terminal of the flat battery.

   Courtesy of PORSCHE CARS NORTH AMERICA, INC.

   External power connection

5. Done, vehicle: Start the engine  in the vehicle with a charged battery and leave it running at high revs.
6. Charge 12-volt lithium battery using an external power supply (at least 5 minutes). The electrical system is reactivated automatically.
7. Operational readiness: established:
   1. 7.1  Disconnect negative cable at the ground point, then disconnect it at the negative terminal of the donor vehicle.
   2. 7.2  Disconnect positive cable at the positive terminal of the donor vehicle, then at the positive terminal of the battery.
8. Push on protection cap on positive terminal of the external power/jump-start connection.
9. Charge the 12-volt lithium-ion battery using > VAS 5908 - battery charger 90A  .
10. Install water tank cover.

    > 852219 REMOVING AND INSTALLING PLENUM PANEL COVER - on "Removing"

11. Establish driving readiness on the vehicle and check that the vehicle drives.
12. Store end position of power windows.
13. Teach wheels and tires in the TPM system.