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Introduction to battery-management systems- COURSERA WEEK 04 FINAL QUIZ

 Introduction to battery-management systems- COURSERA WEEK 04  FINAL QUIZ 1 . Question 1 W hich of the followi ng detection mechanisms could protect a battery pack from overcurre nt? Select all that apply. 1 point Contactor Thermal fuse Electronic protection Resettable fuse 2 . Question 2 Suppose that a small passenger vehicle expends energy at a rate of 220Wh/mile while driving. If this vehicle's battery pack is charged at a 6.6kW rate, what is the rate of range added to the battery in "miles (of range) per hour"? Round your answer to the nearest "mph". 1 point 3 . Question 3 Suppose that a positive-electrode material has \theta_{0\%}^{\rm pos}=0.99 θ 0 % p o s ​ = 0 . 9 9 and \theta_{100\%}^{\rm pos}=0.49 θ 1 0 0 % p o s ​ = 0 . 4 9 . If \theta_k^{\rm pos}=0.59 θ k p o s ​ = 0 . 5 9 , what is the present cell state-of-charge (in percent)? Round to the nearest percent. 1 point 4 . Question 4 Suppose that a lithium-ion cell having total charge capacity Q=10 Q =...
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Introduction to battery-management systems- COURSERA WEEK 02 QUIZ -1.2.1 ANSWERS

 Introduction to battery-management systems- COURSERA WEEK 01  QUIZ -2.1.1 ANSWERS

Practice quiz for lesson 1.2.1

Question 1

Which of the following is true?

1 / 1 point
Correct

Yes. Specific energy is energy per unit weight, so higher specific energy stores more energy.

Question 2

Which of the following are advantage(s) of lithium-ion cells versus most other secondary cells? Select all that apply.

1 / 1 point
Correct

Yes. Lithium-ion cells have nominal voltages generally between 3.3V and 3.8V, whereas many other secondary cells have nominal voltages only around 1.5V.

Correct

Yes. Lithium-ion cells have higher energy density than most secondary cells. Some exceptions include zinc air and lithium air.

Correct

Yes. Lithium-ion cells have self-discharge rates that are often only a few percent per month, whereas NiMH and NiCd can self-discharge that much per day.

Question 3

Which of the following are disadvantage(s) of lithium-ion cells versus most other secondary cells? Select all that apply.

1 / 1 point
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Yes. If you wish to learn more about this, the honors week to this course talks about the details of manufacture in more detail.

Correct

Yes. Lithium-ion cells must be monitored and regulated very carefully to avoid overcharge and overdischarge, for example, to avoid unsafe operating conditions.

Correct

Yes. They are presently more expensive, but costs are coming down as manufacturing methods are optimized.

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