Question

2) A EV battery has a capacity of 15 kWh. Assuming effective capacity used in the beginning is 85% and end of life is 70% of capacity.
9) What is the range (km) that the vehicle (using 80 Wh/km) can support, when the battery is new?
1 point
10) What range (km) will it support at the end of life?
1 point

Answer 1

Answer:

Explanation:

2) Let the number of currency 1 Won, 10 Won and 50 Won be x, y and z respectively.

x+10y+50z=107

Now the possible values of z could be 0, 1 and 2.

For z=0: x+10y=107

for above equation y can range from 0 - 10, taking total 11 values. that means above condition can satisfied by 11 ways.

For z=1: x+10y=57

for above equation y can range from 0 - 5, taking total 6 values. that means above condition can satisfied by 6 ways.

For z=2: x+10y=7

for above equation y can take only 1 value i.e 0. that means there is only 1 way to satisfy above condition.

Total no of ways = 11+6+1=18

9)

Answer 2

Answer:

The range when the battery is new is 160 km.

Explanation:

• Battery performance will determine the range (essential) We'll suppose it is 80Wh/km (approximate efficiency for an EV sedan),
• Beginning range is equal to (0.85*15000 Wh) / 80 Wh/km, or 160 km.
• The battery's depth of discharge is measured by how much of its effective capacity is actually being consumed. As people age, this effective capability steadily drops to 70%. 70 per cent of the 85 per cent, for example
• Range at end of life: 111.56 kilometres = (0.7*0.85*15000 Wh)
• As can be seen, the battery's range significantly decreases, which indicates that the battery has to be replaced because its life is finished.

The final range is 111.56 km.

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