Nissan Leaf. Manual - 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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• 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

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Transmit unit

Signal name

VCM

EV system CAN

Target Li-ion battery remained energy signal