Nissan Leaf. Manual — part 486
LI-ION BATTERY
EVB-227
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Since hybrid vehicles and electric vehicles contain a high voltage battery, there is the risk of
electric shock, electric leakage, or similar accidents if the high voltage component and vehicle are
handled incorrectly. Be sure to follow the correct work procedures when performing inspection and
maintenance.
WARNING:
• Be sure to remove the service plug in order to shut off the high voltage circuits before performing
inspection or maintenance of high voltage system harnesses and parts.
• Be sure to put the removed service plug in pocket and carry it or store it in a tool box or other con-
tainer so that another person does not accidentally connect it while work is in progress.
• Be sure to put on insulating protective gear before beginning work on the high voltage system.
• Clearly identify the persons responsible for high voltage work and ensure that other persons do not
touch the vehicle. When not working, cover high voltage components with an anti-static cover sheet
or similar item to prevent contact with other persons.
• Refer to
EVB-7, "High Voltage Precautions"
.
• If the battery pack is to be disassembled, be sure to remove the Li-ion battery controller for prevent-
ing electric shock, fire, and damage to parts.
CAUTION:
There is the possibility of a malfunction occurring if the vehicle is changed to READY status while the
service plug is removed. Therefore do not change the vehicle to READY status unless instructed to do
so in the Service Manual.
ENVIRONMENT FOR LI-ION BATTERY DISASSEMBLY WORK
1. Must be an indoor environment.
• The environment must utilize a shutter or other means to shut out the outside environment and prevent
rain, snow, dust, or other substances from entering.
• The environment must not cause the intrusion of sweat during work, or cause condensation to occur
due to high temperature or humidity.
2. Metal powder, grease, and other foreign substances must not enter.
• The indoor environment must also prevent metal powder, grease, and other foreign substances from
entering due to maintenance performed on other vehicles and other sources during disassembly work.
• If there is a risk of the above substances entering, take appropriate countermeasures, such as use of a
vinyl curtain or an equivalent to shut out the outside environment.
3. The floor must be dry.
• The floor must not be wet as a result of factors such as vehicle entry during rain or snow.
4. Work space
• The work space must be approximately the size of one entire vehicle.
• Take appropriate countermeasures so that persons other than the operator do not enter the work space,
such as by placing signs indicating that disassembly work is in progress.
5. Standard fire fighting equipment
• Always place a standard fire fighting equipment in the disassembly work area.
• Depending on type of fire (vehicle or battery) use standard fire fighting equipment (water or extin-
guisher).
REMOVAL
1. Remove the battery pack upper case.
EVB-191, "BATTERY PACK UPPER CASE : Removal and Installa-
2. Remove Li-ion battery controller. Refer to
EVB-201, "LI-ION BATTERY CONTROLLER : Removal and
.
3. Remove the following parts. Refer to
EVB-206, "BATTERY JUNCTION BOX AND BATTERY HARNESS :
.
• Battery junction box
• Service plug switch bracket
• High-voltage battery harnesses
• Vehicle communications harness
• Voltage detection harness
• Harness brackets
EVB-228
< UNIT DISASSEMBLY AND ASSEMBLY >
LI-ION BATTERY
4. Disconnect the harness connector between the battery tem-
perature sensor harness (front) and the battery temperature
sensor harness (rear).
WARNING:
To prevent electric shock, wear insulated protective
gear.
5. Remove the battery temperature sensor harness (front) from the front module stack RH.
WARNING:
To prevent electric shock, wear insulated protective gear and use insulated tools.
6. Remove the battery member pipe .
WARNING:
To prevent electric shock, wear insulated protective
gear and use insulated tools.
NOTE:
The right-side mounting hole is larger for facilitating removal of
the battery member pipe. Lifting up the left side first makes
removal easier.
7. Remove the mounting nuts , then remove the bus bar
which connects the left and right front module stacks.
DANGER:
•
There is the danger of electric shock caused by
contact with the terminals. Be sure to wear insulated pro-
tective gear and use insulated tools.
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: Harness clip
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: Battery front
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LI-ION BATTERY
EVB-229
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•
Because there is a danger of electric shock, be sure to close the bus bar cover after remov-
ing the bus bar.
8. Remove the following parts. Refer to
EVB-215, "LI-ION BATTERY HEATER : Disassembly and Assem-
• Li-ion battery heater RH1
• Li-ion battery heater RH2
• Li-ion battery heater LH1
• Li-ion battery heater LH2
9. Remove the Li-ion battery heater relay unit. Refer to
EVB-221, "LI-ION BATTERY HEATER RELAY UNIT
.
10. Disconnect the Li-ion battery heater harness connector . And then remove the harness clips and move
them to a location where they do not inhibit with work.
WARNING:
To prevent electric shock, wear insulated protective gear and use insulated tools.
11.
: Harness clip
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EVB-230
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LI-ION BATTERY
12. Remove the front module stack mounting nuts .
WARNING:
To prevent electric shock, wear insulated protective gear and use insulated tools.
13. Follow the procedure below and remove the front module stack from the battery pack.
a. Attach a carabiner at position as shown in the figure, and attach a sling belt to it.
WARNING:
To prevent electric shock, wear insulated protective gear.
b. Use the engine frame (A) and lift up the front module stack.
WARNING:
To prevent electric shock, wear insulated protective
gear.
CAUTION:
Do not move the engine crane when the front module stack
is lifted up.
Front module stack LH
Front module stack RH
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