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Home >> Toyota >> 2022 >> RAV4 LE, FWD >> Repair and Diagnosis >> External Pages >> Different variant/trim >> Section 4 (Hybrid Battery Control System - Service Information (5 Of 7)) >> HV BATTERY (for LITHIUM-ION BATTERY) >> Discharging [06/2020 - ] >> Procedure

Discharging [06/2020 - ]: Procedure

WARNING: This page is about a different variant/trim than selected.
  1. DISCHARGING (WHEN USING THE LI-ION BATTERY DISCHARGER) 
    WARNING:

    Be sure to wear insulated gloves and protective goggles.

    NOTE:

    Make sure to observe the following points when using the Li-ion battery discharger. 

    • Set it in a secure, flat place.
    • Set it in a dry place protected from dust and water.
    • Set it in a position where illumination of the LED indicators can be observed.
    • Do not block the ventilation holes or cooling fans.
    1. Select Li-ion battery connection cables
      1. Confirm the type of the Li-ion battery connection cable as indicated by the tag shown in the illustration. (Type: TM4216-71)
        GTY749743Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    2. Install Li-ion battery connection cable
      1. Set the Li-ion battery discharger as shown in the illustration.
        GTY388483Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      2. Connect the Li-ion battery connection cable connector (A) to the Li-ion battery discharger connector (A).
        NOTE:

        Make sure that the connector is connected securely.

        GTY555009Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
        *a Connector (A)
      3. Connect the Li-ion battery connection cable connector (B) to the Li-ion battery discharger connector (B).
        NOTE:

        Make sure that the connector is connected securely.

        GTY578492Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
        *a Connector (B)
      4. Set the Li-ion battery discharger as shown in the illustration.

        HINT: 

        The Li-ion battery discharger is set on its side so that the ventilation holes will not be blocked.

        GTY388393Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    3. Connect Li-ion battery connection cable
      1. GTY996424Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

        Move the lock lever while pushing the lock, and disconnect the 2 high-voltage connectors (orange) from the battery ECU assembly.

        NOTE:
        • Make sure to release the lock of the lock lever before moving it.
          GTY737421Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
          *a Lever Lock
        • If the connector cannot be disconnected, check if the lock lever is completely unlocked.
        • Insulate each disconnected high-voltage connector with insulating tape. Wrap the connector from the wire harness side to the end of the connector.
      2. Connect the Li-ion battery connection cable connectors (orange) to the 2 high-voltage connectors (orange) of the HV battery.
        GTY996423Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      3. Confirm that all of the LED indicators are illuminated as shown in the following table.
        WARNING:

        If all of the LED indicators of the Li-ion battery discharger listed in the following table are not illuminated, the HV battery cannot be discharged using the Li-ion battery discharger. Make sure to soak the HV battery in a salt water solution to complete discharging.

        GTY773145Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
        LED INDICATOR ILLUMINATION STATUS (WHEN DISCHARGE HAS STARTED NORMALLY)

        LED Indicator No. LED Indicator Illumination Status LED Indicator No. LED Indicator Illumination Status LED Indicator No. LED Indicator Illumination Status
        1 Illuminated 2 Illuminated 3 Illuminated
        4 Illuminated 5 Illuminated 6 Illuminated
        7 Illuminated 8 Illuminated 9 Illuminated
        10 Illuminated 11 Illuminated 12 Illuminated
        13 Illuminated 14 Illuminated 15 Illuminated
        16 Illuminated 17 Illuminated 18 Illuminated
        19 Illuminated 20 Illuminated 21 Illuminated
        22 Illuminated 23 Illuminated 24 Illuminated
        25 Illuminated 26 Illuminated 27 Illuminated
        28 Illuminated 29 Illuminated 30 Illuminated
        31 Illuminated 32 Illuminated 33 Illuminated
        34 Illuminated 35 Illuminated 36 Illuminated
        37 Illuminated 38 Illuminated 39 Illuminated
        40 Illuminated 41 Illuminated 42 Illuminated
        43 Illuminated 44 Illuminated 45 Illuminated
        46 Illuminated 47 Illuminated 48 Illuminated
        49 Illuminated 50 Illuminated 51 Illuminated
        52 Illuminated 53 Illuminated 54 Illuminated
        55 Illuminated 56 Illuminated 57 Illuminated
        58 Illuminated 59 Illuminated 60 Illuminated
        61 Illuminated 62 Illuminated 63 Illuminated
        64 Illuminated 65 Illuminated 66 Illuminated
        67 Illuminated 68 Illuminated 69 Illuminated
        70 Illuminated 71 Not illuminated 72 Not illuminated
        73 Not illuminated 74 Not illuminated 75 Not illuminated
      4. Confirm that the cooling fans operate.
        GTY763282Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
        *a Cooling Fans - -

        HINT: 

        • To discharge the HV battery completely, continue discharging for at least 1 hour after the LED indicators have turned off.
        • Discharge of a fully charged HV battery will complete within 5 hours (including 1 hour waiting time after the LED indicators have turned off).
    4. Confirm discharge completion
      1. Confirm that all of the LED indicators of the Li-ion battery discharger have turned off.
      2. Continue to discharge the battery for 1 hour after all of the LED indicators of the Li-ion battery discharger have turned off.
    5. Disconnect Li-ion battery connection cable
      1. Disconnect the Li-ion battery connection cable connector (orange) from the 2 high-voltage connectors (orange) of the HV battery.
        GTY996426Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    6. Remove Li-ion battery connection cable
      1. Set the Li-ion battery discharger as shown in the illustration.
        GTY388395Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      2. Disconnect the Li-ion battery connection cable connector (B) from the Li-ion battery discharger connector (B).
        GTY582550Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
        *a Connector (B)
      3. Disconnect the Li-ion battery connection cable connector (A) from the Li-ion battery discharger connector (A).
        GTY575126Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
        *a Connector (A)
  2. DISCHARGING (WHEN USING THE SALT WATER SOLUTION) 
    WARNING:

    Be sure to wear insulated gloves and protective goggles.

    NOTE:
    • When discharging using salt water solution, first add a measured amount of water to the container, and then add the concentrated salt water solution.
    • Calculate the salt water concentration based on the measured volume of water in the container so that a 1% salt water solution will be made after adding the concentrated salt water solution to the water in the container where HV battery is set.
    1. Prepare HV battery
      1. Set the HV battery in the container (A).
        GTY996855Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
        *a Example
        *b Container (A)
    2. Prepare to discharge (Add water to container)
      1. Measure the water capacity of the container (B).
        GTY597759Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
        *a Example
        *b Container (B)

        HINT: 

        Water capacity of the container (B) is assumed as X (liter).

      2. Using the container (B), add water to the container (A) until the HV battery is completely submerged.
        GTY996151Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
        *a Example
        *b Water Surface
        *c Container (A)
        *d Container (B)
        NOTE:

        Make sure to record the times the container (B) was filled with water to add water to the container (A).

      3. Using the following formula, calculate the amount of water added to the container (A).

        Amount of water added to the container (A)

        Y (liter) = Water capacity of the container (B) x Number of times the container (B) was filled with water to submerge the HV battery

        HINT: 

        Amount of water added to the container (A) is assumed as Y (liter).

    3. Prepare salt water solution
      1. While measuring the amount of water, fill about half of the container (B) with water.
        GTY555483Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
        *a Example
        *b Container (B)

        HINT: 

        Amount of water added to the container (B) is assumed as Z (liter).

      2. Calculate the amount of salt to be added to the container (A) so that a 1% salt water solution will be made.

        Amount of Salt

        Amount of salt (kg) = (Y (liter) + Z (liter)) x 0.01

      3. Add the calculated amount of salt to the container (B) and stir it thoroughly.
        GTY546771Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
        *a Example
        *b Container (B)
    4. Add salt water solution
      1. Add the concentrated salt water solution to the container (A).
        GTY610362Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    5. Discharge
      1. Leave the HV battery as is for 24 hours or more until discharge is complete.
        WARNING:
        • Do not place a lid on the container.
        • Make sure to leave the HV battery and container as is for 24 hours or more.
        • Display a warning sign to inform others that discharge is being performed.
    6. Confirm discharge completion
      1. Check that bubbles are not forming in the container.
        NOTE:

        If bubbles are forming, discharge may not be completed yet. Do not place a lid on the container.

    7. Display a warning sign such as "DO NOT TOUCH! (DISCHARGE BEING PERFORMED) to inform others. Make a copy of the warning sign and place it near the HV battery being discharged.
      GTY390230Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
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