Page 20 - i-MeIV Product Information

Lithium-ion battery

3. Battery
3-1-1 Lithium-ion battery
Battery pack for i-MiEV is consisted by 88 pieces of Lithium –ion battery cell.
Each battery cell has 3.75V 50Ah and they are connected serially.
Total output of battery pack is DC 330V 16kWh.
In order to provide an extra margin of safety against the collision, each batteries is set in the hard case.

Battery cell

Battery pack

Battery module

3-1-2 What is Lithium-ion battery
Lithium-ion battery uses Lithium manganate at anode and graphite at cathode.
It has better power vs weight ratio than lead-acid storage battery and it has higher electromotive force [per cell] than
Nickel-Mangan battery.
It uses carbonic acid ester as electrolyte, therefore, risk of burn injury is low .
Lithium-ion battery has no memory function, battery can be charged any time, any charging status of battery.
It will require the special handling when it is charged and discharged, i-MiEV manage them by EV-ECU, BMU, CMU.

Advantage ： -No memory function
: -High energy density

Disadvantage ：-Electrolyte of battery deteriorates easily under the battery is fully charged condition due to the
flocking of the Lithium-ion at Cathode.
-Cathode deteriorates easily under fully discharged condition.

Lithium-ion battery has disadvantage at fully charged condition and fully discharged condition.

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