Page 23 - i-MeIV Product Information

Cooling system

4. Cooling system
4-1 Cooling system for Power unit
i-MiEV has cooling unit for the power unit, Motor, Inverter, OBC [On-Board Charging system] & DC/DC Converter
to achieve the high reliability of EV system.

[Features]
Electric motor driven water pump is adopted. The motor is brushless type which features long life and low noise,
and electrical power for the motor is supplied from DC 12V battery for auxiliaries.
Cooling system of i-MiEV is composed of a radiator, an cooling fan, a reservoir, and electric water pump and
connecting hoses that route LLC to maintain OBC, MCU under 60 degrees Celsius.
Basically, these cooling module is carried over from the petrol powered “i”.
When the coolant temperature is high, cooling fan is activated. The fan will activated also while the charging.
Fan speed at charging is regulated considering the noise at night. Noise level will not exceed the noise
from household use A/C.

MCU [Motor Control Unit]
OBC & DC/DC converter

Condenser
EV motor Water pump tank for
Radiator
Cooling module
Cooling fan register

Condenser Systems
tank for to be
Radiator Radiator cooled
A/C condenser
Cooling fan OBC & MCU
&
Motor DC/DC [Inverter] Water
converter Temperature
sensor
Air
WP EV motor

Water pump

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