WorksheetsEV Batteries and Charging Systems
Total questions: 20
Worksheet time: 10mins
A battery cell consists of
Two primary elements
Three primary elements
Four primary elements
None of the anwers
A battery labeled 100 Ah at C5 rate. What is the discharge current?
20 A
0.05 A
500 A
5 A
Unit of specific energy is
Kg/Wh
Wh/Kg
Wh
Kg
The net cycle efficiency has a maximum in the
High range of SoC
Lower range of SoC
Middle range of SoC
Zero
The specific power of a chemical battery depends mostly o
Battery current
Battery capacity
Efficiency
Battery’s internal resistance
The typical estimated life of a Lithium-Ion battery is
300 to 500 charge cycles
200 to 500 charge cycles
100 to 500 charge cycles
400 to 500 charge cycles
Who is the biggest EV battery manufacturers in India?
Amara Raja Batteries
TATA AutoComp Systems Limited
Exide Industries
LG Energy Solution
One Ah equals to
100 C
4000 C
1000 C
3600 C
The Practical capacity of battery is always
Much lower with theoretical capacity
Much higher with theoretical capacity
Both are equal
Slightly higher
The stored electrical potential energy in a 12 V, 100 Ah battery is
1.23 MJ
4.32 MJ
5.32 MJ
6.85 MJ
Most efficient charging method for EV battery is
Multi current charging
Constant voltage
Constant current
Constant current - Constant voltage
Charge capacity of 18650 Li-Ion battery is
1600 mAh - 2500 mAh
2000 mAh - 3000 mAh
600 mAh - 1000 mAh
2600 mAh - 3500 mAh
DC fast charging voltage level is
120 V
208 / 240 V
208 / 480 V
208 / 600 V
When two batteries are connected in parallel, it should be ensured that
They have same emf
They have same make
They have same ampere hour capacity
They have identical internal resistance
The capacity of a battery is expressed in terms of
Current rating
Voltage rating
Ampere hour rating
C rating
Trickle charger of a storage battery helps to
Maintain proper electrolyte level
Increase its reverse capacity
Prevent sulphation
Keep it fresh and fully charged
Batteries are charged by
Rectifiers
Engine generator sets
Motor generator sets
All the mentioned
The terminal voltage when the battery is being charged decreases with
Increasing charging rate
Increasing temperature
Increasing stage of charge
All the mentioned
Five 2 V cells are connected in parallel. The output voltage is
1 V
1.5 V
1.75 V
2 V
If the battery is wrongly connected on charge following will happen
Current delivered by the battery will be high
Current drawing will be Nil
Currently drawing will be very small
Currently drawing will be very high
