07/08/2024 13:30:49
High Voltage Battery Assembly - HV Battery Discharge - At Contactors (Discharge)
Correction code NA NOTE: Unless otherwise explicitly stated in the procedure, the above correction code and FRT reflect all of the work required to perform this procedure, including the linked procedures. Do not stack correction codes unless explicitly told to do so. NOTE: See Flat Rate Times to learn more about FRTs and how they are created. To provide feedback on FRT values, email LaborTimeFeedback@tesla.com. NOTE: See Personal Protection to make sure wearing proper PPE when performing the below procedure.
Warning
This procedure is a DRAFT. Although it has been validated, Warnings and Cautions might be missing. Follow safety requirements and use extreme caution when working on or near High Voltage systems and components. Provide corrections and feedback to ServiceDevelopment@teslamotors.com.
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Remove all items from pockets and ensure not wearing metal items
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Inspect the leads, probes, and insulation on all multimeter and insulation meter wires for damage
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Ensure entire work area is clear
NoteIncluding above and below battery
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Place HV Danger placard on top of battery
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Place barricades around work area
NoteNote location of extinguishers and HV rescue hook
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Inspect HV battery for dents, fluid leaks, or other signs of instability
NoteIf found, refer to Toolbox Article 7396600
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Disconnect pressurized pack lines
Note2x VOSS fittings, 12mm, 8Nm
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Inspect HV insulating gloves
NoteCheck gloves for damage prior to each use, Refer to service document TN-15-92-003 R5, for information on inspecting HV gloves, https://service.tesla.com/docs/ServiceBulletins/External/TN/TN-15-92-003_High_Voltage_Awareness_Care_Points_R5.pdf
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Put on HV insulating gloves and leather over gloves
NoteMake sure to wear Electrical Protective Gloves any time Hioki tester is used
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Remove Pyro Fuse Access cover
Note4x bolts, E-Torx 5 lobe, 10 Nm
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Remove primary pyro fuse
Note2x bolts, 13mm, 5 Nm + 60 Degrees, Support pyro fuse while removing bolts
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Remove secondary pyro fuse
Note2x bolts, 13mm, 5 Nm + 60 Degrees, Support pyro fuse while removing bolts
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Remove fast charger header doubler
Note2x bolts, E10 5 Lobe Torx, 10 Nm
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Release low voltage header
Note2x bolts, 10mm, 6 Nm
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Release fasteners securing ancillary cover to HV battery
Note22x bolts, E10 5-Lobe, 6 Nm, Use E10 5-Lobe socket without magnet, The fasteners are captive and will stay attached to the penthouse cover, Follow fastening order
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Remove ancillary cover
NoteUse suction cup and maneuver around busbar and tonneau cage
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Remove High Side pack contactor terminal bolt
Note1x bolt, Torx Plus 55, 5Nm + 60 Degrees, Captured bolt with insulated cover, Pull upwards firmly to release from device cluster housing
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Install contactor terminal adapter to High Side contactor terminal
NoteHand tight only
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Install Contactor Bypass adapter positive lead to High Side pack contactor terminal
Note1x bolt, Torx Plus 55, Hand tight only, Red lead is positive
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Install Contactor Bypass adapter negative lead to High Side pack shunt terminal
Note1x bolt, 13mm, 5 Nm + 60 degrees
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Inspect the HV battery discharger tool HV cables and adapters for any damage
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Connect the power cable to the HV battery discharger and an electrical outlet
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Turn on the HV battery discharger
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Ensure the emergency stop button is pushed in
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Connect the DC cable to the HV battery discharger
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Connect the other end of the DC cable to the Contactor bypass adapter
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Pull out the emergency stop button
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Set the mode
NoteRotate the mode switch to MODE, Rotate the data entry knob until "CAN: Smt" and "Contactors: Bypassed" is shown
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Set the limits
NoteRotate the mode switch to LIMITS, Rotate the data entry knob to select the proper battery type (kWh rating) and desired discharge limit (shippingmethod), The “LAND” setting is applicable for discharging the majority of HV batteries, HV batteries are rarely shipped by air. Use the “AIR” option when discharging a HV battery with physical damage, or when isolation is lower than nominal
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Rotate the MODE switch to the RUN position
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Press the START/STOP button and follow the instructions on the display
NoteAfter each hour of operation, the HV battery discharger prompts the operator to press the START/STOP button again, so as to enforce proper monitoring of the discharge process, If the START/STOP button is not pressed within 5 minutes, the HV battery discharger stops the discharge cycle, To stop the discharge process early, press the START/STOP button again, The discharger will automatically shut down when the previously selected SOC is reached and display one of the following messages: Min Pack V Met, SOC Voltage Met, SOC Level Met, Min Cell V Met
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Remove HV insulating gloves
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Discharge Complete
NoteThe discharger will automatically shut down when the previously selected SOC is reached and display the following message:SOC Voltage Met.
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Inspect HV insulating gloves
NoteCheck gloves for damage prior to each use, Refer to service document TN-15-92-003 R5, for information on inspecting HV gloves
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Put on HV insulating gloves and leather over gloves
NoteMake sure to wear Electrical Protective Gloves any time Hioki tester is used
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Ensure the emergency stop button is pushed in
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Disconnect the DC cable from the HV battery discharger
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Disconnect the DC cable from the Contactor bypass adapter
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Disconnect the low voltage harness from the socket on the front of the HV battery discharger
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Turn off the HV battery discharger
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Remove the power cable from the HV battery discharger and electrical outlet
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Remove Contactor Bypass adapter positive lead from High Side pack contactor terminal
Note1x bolt, Torx Plus 55, 5Nm + 60 Degrees, Captured bolt with insulated cover, Red lead is positive
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Remove Contactor Bypass adapter negative lead from High Side pack shunt terminal
Note1x bolt, 13mm, 5 Nm + 60 degrees, Black lead is negative
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Remove contactor terminal adapter from High Side pack contactor terminal
NoteThread out by hand
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Install High Side pack contactor terminal bolt
Note1x bolt, Torx Plus 55, 5Nm + 60 Degrees, Captured bolt with insulated cover, Push downwards firmly to secure in device cluster housing
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Remove Low Side pack contactor terminal bolt
Note1x bolt, Torx Plus 55, 5Nm + 60 Degrees, Captured bolt with insulated cover, Score edge with insulated knife then break off corner to allow captured bolt to be removed
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Install contactor terminal adapter to Low Side contactor terminal
NoteHand tight only
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Install Contactor Bypass adapter negative lead to Low Side pack contactor terminal
Note1x bolt, Torx Plus 55, Hand tight only, Black lead is negative
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Install Contactor Bypass adapter positive lead to Low Side pack shunt terminal
Note1x bolt, 13mm, 5 Nm + 60 degrees, Red lead is positive
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Inspect the HV battery discharger tool HV cables and adapters for any damage
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Connect the power cable to the HV battery discharger and an electrical outlet
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Turn on the HV battery discharger
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Ensure the emergency stop button is pushed in
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Connect the DC cable to the HV battery discharger
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Connect the other end of the DC cable to the Contactor bypass adapter
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Pull out the emergency stop button
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Set the mode
NoteRotate the mode switch to MODE, Rotate the data entry knob until "CAN: Smt" and "Contactors: Bypassed" is shown
-
Set the limits
NoteRotate the mode switch to LIMITS, Rotate the data entry knob to select the proper battery type (kWh rating) and desired discharge limit (shippingmethod), The “LAND” setting is applicable for discharging the majority of HV batteries, HV batteries are rarely shipped by air. Use the “AIR” option when discharging a HV battery with physical damage, or when isolation is lower than nominal
-
Rotate the MODE switch to the RUN position
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Press the START/STOP button and follow the instructions on the display
NoteAfter each hour of operation, the HV battery discharger prompts the operator to press the START/STOP button again, so as to enforce proper monitoring of the discharge process, If the START/STOP button is not pressed within 5 minutes, the HV battery discharger stops the discharge cycle, To stop the discharge process early, press the START/STOP button again, The discharger will automatically shut down when the previously selected SOC is reached and display one of the following messages: Min Pack V Met, SOC Voltage Met, SOC Level Met, Min Cell V Met
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Remove HV insulating gloves
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Low Side Discharge Complete
NoteThe discharger will automatically shut down when the previously selected SOC is reached and display the following message:SOC Voltage Met.
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Inspect HV insulating gloves
NoteCheck gloves for damage prior to each use, Refer to service document TN-15-92-003 R5, for information on inspecting HV gloves, https://service.tesla.com/docs/ServiceBulletins/External/TN/TN-15-92-003_High_Voltage_Awareness_Care_Points_R5.pdf
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Put on HV insulating gloves and leather over gloves
NoteMake sure to wear Electrical Protective Gloves any time Hioki tester is used
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Ensure the emergency stop button is pushed in
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Disconnect the DC cable from the HV battery discharger
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Disconnect the DC cable from the Contactor bypass adapter
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Disconnect the low voltage harness from the socket on the front of the HV battery discharger
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Turn off the HV battery discharger
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Remove the power cable from the HV battery discharger and electrical outlet
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Remove Contactor Bypass adapter negative lead from Low Side pack contactor terminal
Note1x bolt, Torx Plus 55, 5Nm + 60 Degrees, Captured bolt with insulated cover, Black lead is negative
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Remove Contactor Bypass adapter positive lead from Low Side pack shunt terminal
Note1x bolt, 13mm, 5 Nm + 60 degrees, Red lead is positive
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Remove contactor terminal adapter from Low Side pack contactor terminal
NoteThread out by hand
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Install Low Side pack contactor terminal bolt
Note1x bolt, Torx Plus 55, 5Nm + 60 Degrees, Captured bolt with insulated cover
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Clean inside the ancillary bay with an ESD-safe vacuum
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Install ancillary cover
NoteUse suction cup and maneuver around busbar and tonneau cage
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Secure fasteners of cover to HV battery
Note22x bolts, E10 5-Lobe, 6 Nm, Use E10 5-Lobe socket without magnet, The fasteners are captive and will stay attached to the penthouse cover, Follow fastening order
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Secure low voltage header
Note2x bolts, 10mm, 6 Nm
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Secure fast charger header doubler
Note2x bolts, E10 5 Lobe Torx, 10Nm
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Install secondary pyro fuse
Note2x bolts, 13mm, 5 Nm + 60 degrees, Support pyro fuse while installing bolts
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Install primary pyro fuse
Note2x bolts, 13mm, 5 Nm + 60 degrees, Support pyro fuse while installing bolts
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Perform Hioki resistance test at each HV joint from HV busbar lead to pyro fuse busbar
Note4x HV joints, When using Hioki tester, verify the meter has been properly adjusted and set prior to usageThe acceptable resistance is between 0.050 mΩ (50 μΩ) and 0.195 mΩ (195 μΩ).If the resistance is greater than 0.195 mΩ (195 μΩ), stop work and escalate the Toolbox session.If the resistance is lower than 0.050 mΩ (50 μΩ), reposition the probes and measure again.If the resistance is repeatedly between 0.00 mΩ and 0.050 mΩ (50 μΩ), hioki test passed, proceed to next step
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Install Pyro Fuse Access cover
Note4x bolts, E-Torx 5 lobe, 10 Nm, Ensure seal is fully seated and undamaged
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Remove HV insulating gloves
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Install pressurized pack lines
Note2x VOSS fittings, 12mm, 8 Nm, Remove plastic caps from VOSS fittings if installing new fuse cover, Press air lines into fitting until mark aligns with top of fitting, Verify line is properly secured by performing push and pull test
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Remove the HV Danger placard from the top of the battery
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Remove barriers from around battery