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- Politecnico di Milano
- Degree programme
- Energy Engineering
- Subject
- Electrochemical Energy Conversion and Storage
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- Exam · Full exam
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Study material for Electrochemical Energy Conversion and Storage, shared by the Studwiz community and reviewed by moderators.
Electrochemical Energy Conversion and StorageFull exam
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Study material for Electrochemical Energy Conversion and Storage, shared by the Studwiz community and reviewed by moderators.
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EX1 BASIC 20.5 kW at 0.4 A/cm2 (320 cells - 200 cm2) MH2= 5.907 Kg (6 h at 0.4 A/cm2) EX2 BASIC 20.1% SoC Exercise 1 Intermediate 2 batteries of 50 Ah reference Initial Final reference C Ah 100 100 100 100 SoC 0.5 0.9 0.15 0.5 C rate 1.5 1.5 1.5 1.5 I A 150 150 150 150 R mem ohm 0.002 0.002 0.002 0.002 eta ohm V 0.3 0.3 0.3 0.3 2b V 0.1 0.1 0.1 0.1 DeltaV V 3.55 3.61 3.43 4.00 efficiency with 2 batteries= 86.8% More than 2 batteries are necessary Exercise 1 Difficult i high 15000 A/m2 i low 1000 A/m2 Rct 0.05 ohm cm2 b=Rct*i 0.075 V a channel 0.34 s 3E-04 m D 4E-06 m2/s a cl @1,5 A/cm2 0.258 a cl @0,1 A/cm2 0.335 DeltaV @ 0,1 A/cm2 0.03 V (only ECSA loss) ECSA eol / ECSA bol 67.0% DeltaV @ 1,5 A/cm2 0.05 V DeltaV ECSA loss 0.03 V DeltaV GDL loss 0.02 V a cl eol/ a cl bol 76.6% a cl eol 0.198 D eol 1.8E-06 m2/s D eol/ Dbol 46.1% Discharge ܴ݁ ( )ܼ(݉ܫ 0 . 1 ߗ ݉ܿ 2 ߗ 0 . 15 ߗ ݉ܿ 2 Initial Final 100 100 0.15 0.90 1.5 1.5 150 150 0.002 0.002 0.3 0.3 0.1 0.1 3.95 4.16 Charge ܴ݁ ( ܼ )
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