Nissan Leaf. Instruction — part 434
COMPONENT PARTS
EVB-19
< SYSTEM DESCRIPTION >
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• Two rear Li-ion battery heaters are installed to the rear module
stack.
Battery Current Sensor
INFOID:0000000010121034
• The battery current sensor is installed to bus bar between battery
junction box and rear module stack.
• This sensor measures charge/discharge current sent to Li-ion bat-
tery and transmits a current signal to Li-ion battery controller
(LBC).
• Li-ion Battery controller (LBC) measures remaining battery level
according to charge/discharge current and sends the data to VCM.
Battery Temperature Sensor
INFOID:0000000010121035
• Three battery temperature sensors mounted in the battery pack
measure the temperature.
• The installation position of the sensors are;
- Front module stack RH: Two for front and rear
- Rear module stack: One
• The sensor uses a thermistor with a resistance value that varies
according to changes in temperature. The electrical resistance of
the thermistor decreases as the temperature increases.
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EVB-20
< SYSTEM DESCRIPTION >
COMPONENT PARTS
Battery Junction Box
INFOID:0000000010121036
• The battery junction box is installed to the front side in the battery
pack.
• The battery junction box includes:
- System main relay to provide/interrupt DC current sent from Li-ion
battery.
- Pre-charge relay to protect the high voltage circuit from a high cur-
rent immediately after power switch ON.
• Installed to both positive side and negative side, the system main
relay provides DC current to each high voltage part. In addition, the
system main relay provides DC current to the Li-ion battery during
motor regeneration or charge.
• When an error occurs in the system, the system main relay is
turned OFF and the Li-ion battery is interrupted for ensuring safety, based on a command from VCM (Vehi-
cle control module).
Service Plug
INFOID:0000000010121037
• The service plug is included in the Li-ion battery to securely dis-
connect the high voltage during high voltage part inspection and
maintenance.
• The service plug is installed on the upper surface of the battery
pack. The plug can be removed when the leg-room mounted ser-
vice plug cover is removed.
• Always use insulating protective equipment when removing and
installing service plug.
High Voltage Warning Label
INFOID:0000000010121038
High voltage warning label is affixed to each of the following component parts.
After replacing a part, check that the part is affixed with a label. If the label is not affixed, be sure to affix the
label in the original position.
Li-ion Battery
• The label is affixed to the rear end of Li-ion battery.
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: Vehicle front
: Direction of the label
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COMPONENT PARTS
EVB-21
< SYSTEM DESCRIPTION >
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EVB
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• The label is affixed to the body panel near the high voltage harness
connector.
Li-ion Battery Controller
The label is affixed to the main body of controller.
Service Plug
The label is affixed to the inspection hole cover .
: Vehicle front
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: Direction of the label
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EVB-22
< SYSTEM DESCRIPTION >
SYSTEM
SYSTEM
LI-ION BATTERY CONTROL SYSTEM
LI-ION BATTERY CONTROL SYSTEM : System Description
INFOID:0000000010121039
SYSTEM DIAGRAM
INPUT/OUTPUT SIGNAL ITEM
Input Signal Item
Output Signal Item
JSCIA0731GB
Transmit unit
Signal name
VCM
EV system CAN
Target Li-ion battery remained energy signal
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