Engineering, 25.04.2021 04:30 ehhshsh

BEV has the following requirements: eight years of operation at an average of 24,000 km per year, averaged out over 365 days per year. Assume an average battery output of 204 Wh/km and a rated cell voltage of 3.6 V, a capacity of 3.4 Ah, and a lifetime index of L 1. i) Determine the BOL kWh storage. ii) How many cells do you need and what is the BOL range? iii) What is the BOL storage and how many cells are required for a larger pack in order to increase the BOL range to 425 km? iv) How many parallel strings are required if the pack has 96 cells in series? v) What is the battery pack mass, assuming a battery with a pack density of 150 Wh/kg? vì) If the peak power is 325 kW, what is the P/E ratio of the battery for the lar- ger pack? [Ans. 39.16 kWh, 3,200, 192 km, 86.7 kWh, 7,083, 74, 578 kg, 3.5] 3.2 A PHEV battery pack has the following requirements: ten years of operation at an average of 50 km per day, an average battery output of 5 km/kWh, and a 14.6 Ah cell with a rated voltage of 3.65 V and an index of L = 3. i) What is the BOL battery pack energy storage? ii) What is the total number of cells required, to the nearest factor of 3? iii) What is the pack voltage if the pack is in series-parallel with three cells in parallel? iv) If the peak power is 110 kW, what is the P/E ratio of the battery? v) What is the battery pack mass, assuming a with a pack density of 150 Wh/kg? [Ans. 15.4 kWh, 288 (to nearest multiple of 3), 350 V, 7.1, 103 kg]

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BEV has the following requirements: eight years of operation at an average of 24,000 km per year, av...

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