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9. Design a battery pack composed of D cells (6.35 cm longx3.18 cm diameter, each weighing 0.100kg). The final package (see figure) must supply 42.0V (a coming standard for all cars) at 30.0A for 2.00 hours. Each cell produces 3.0V and has a power producing density of 125 W/kg and an energy storage density of 125 Wh/kg. Estimate W and L for the package.

9. Design a battery pack composed of D cells (6.35 cm longx3.18 cm diameter, each weighing 0.100kg). The final package (see figure) must supply 42.0V (a coming standard for all cars) at 30.0A for 2.00 hours. Each cell produces 3.0V and has a power producing density of 125 W/kg and an energy storage density of 125 Wh/kg. Estimate W and L for the package.

Introductory Circuit Analysis (13th Edition)
Introductory Circuit Analysis (13th Edition)
13th Edition
ISBN:9780133923605
Author:Robert L. Boylestad
Publisher:Robert L. Boylestad
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na lsoimerbouo93 Exercises 9. Design a battery pack composed of D cells (6.35 cm long× 3.18 cm diameter, each weighing 0.100kg). The final package (see figure) must supply 42.0V (a coming standard for all cars) at 30.0A for 2.00 hours. Each cell produces 3.0V and has a power producing density of 125 W/kg and an energy storage density of 125 Wh/kg. Estimate W and L for the package. 10. Compare a battery made from the aqueous half-cells: Mg+++2e-+Mg(s) and Cu+++2e-+Cu(s) with one made from Fe+++2e-+Fe(s) and Ag++e-+Ag(s). What are the voltages, and can you speculate on the relative weights of the bat- teries if the densities of Mg(s), Cu(s), Fe(s), and Ag(s) are 1,740, 7,190, 7,780, and 10,500kg/m³, respectively? (Hint: A significant part of the weight of an electrochemical cell is the weight of its electrodes.) 11. Consider a graph of the half-cell potentials in Table 17.2 versus the density of the electrode metal in the half-cell. Explain whether or not it is possible to design a cell that is both light and high voltage (say, more than 3 V). 12. An industrial fuel cell has to supply a continuous 20.MW to a perfectly effi- 6. cient inverter at 123 V. Assuming it uses a hydrogen gas/air PEM system, what .1:
Transcribed Image Text:na lsoimerbouo93 Exercises 9. Design a battery pack composed of D cells (6.35 cm long× 3.18 cm diameter, each weighing 0.100kg). The final package (see figure) must supply 42.0V (a coming standard for all cars) at 30.0A for 2.00 hours. Each cell produces 3.0V and has a power producing density of 125 W/kg and an energy storage density of 125 Wh/kg. Estimate W and L for the package. 10. Compare a battery made from the aqueous half-cells: Mg+++2e-+Mg(s) and Cu+++2e-+Cu(s) with one made from Fe+++2e-+Fe(s) and Ag++e-+Ag(s). What are the voltages, and can you speculate on the relative weights of the bat- teries if the densities of Mg(s), Cu(s), Fe(s), and Ag(s) are 1,740, 7,190, 7,780, and 10,500kg/m³, respectively? (Hint: A significant part of the weight of an electrochemical cell is the weight of its electrodes.) 11. Consider a graph of the half-cell potentials in Table 17.2 versus the density of the electrode metal in the half-cell. Explain whether or not it is possible to design a cell that is both light and high voltage (say, more than 3 V). 12. An industrial fuel cell has to supply a continuous 20.MW to a perfectly effi- 6. cient inverter at 123 V. Assuming it uses a hydrogen gas/air PEM system, what .1:
ont alleo la le The figure that follows applies to Exercises 7, 8, and 9. W -mte yd boilaite Jon Jarh goigen od L loimeroooole ov neURE 17.10 7. Design a battery pack composed of D cells (6.35 cm long x3.18 cm diameter, each weighing 0.100kg). The final package (see figure) must supply 42.0V (a coming standard for all cars) at 30.0A for 2.00 hours. Each cell produces 3.0V and has a power producing density of 125 W/kg. Estimate W and L for the package (ignore its energy storage density for now). 8. Design a battery pack composed of D cells (6.35 cm long x3.18 cm diameter, each weighing 0.100 kg). The final package (see figure) must supply 42.0V (a coming standard for all cars) at 30.0A for 2.00 hours. Each cell produces 3.0 V and has an energy storage density of 125 Wh/kg. Estimate W and L for the package (ignore its power producing density for now). od 0,2ala
Transcribed Image Text:ont alleo la le The figure that follows applies to Exercises 7, 8, and 9. W -mte yd boilaite Jon Jarh goigen od L loimeroooole ov neURE 17.10 7. Design a battery pack composed of D cells (6.35 cm long x3.18 cm diameter, each weighing 0.100kg). The final package (see figure) must supply 42.0V (a coming standard for all cars) at 30.0A for 2.00 hours. Each cell produces 3.0V and has a power producing density of 125 W/kg. Estimate W and L for the package (ignore its energy storage density for now). 8. Design a battery pack composed of D cells (6.35 cm long x3.18 cm diameter, each weighing 0.100 kg). The final package (see figure) must supply 42.0V (a coming standard for all cars) at 30.0A for 2.00 hours. Each cell produces 3.0 V and has an energy storage density of 125 Wh/kg. Estimate W and L for the package (ignore its power producing density for now). od 0,2ala
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