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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 04 QUIZ -1.4.3 ANSWERS

 

Practice quiz for lesson 1.4.3

Question 1

Which battery-pack quantities might a host application need to know? Select all that apply.

1 / 1 point
Correct

Yes. The amount of available power indicates how quickly energy can be added to or removed from the battery pack. This is information many applications must know.

Correct

Yes. The amount of remaining energy corresponds to the amount of work that the battery pack can perform, which is information many applications must know.

Question 2

Which of the following quantities must we estimate because it is impossible to measure their values? Select all that apply.

1 / 1 point
Correct

Correct. It is not possible to measure cell state of charge directly, so this value must be estimated using quantities that can be measured directly.

Correct

Correct. It is not possible to measure cell total charge capacity Q directly, so this value must be estimated using quantities that can be measured directly.

Correct

Correct. It is not possible to measure cell resistance directly, so this value must be estimated using quantities that can be measured directly.

Question 3

What are some consequences of using a simple BMS power-limits algorithm instead of a more accurate but more complicated BMS algorithm?

1 / 1 point
Correct

Yes. And, this can lead to customer perception of poor performance; the customer will not recommend your product or be a repeat purchaser.

Correct

Yes. And, this causes the battery pack to be more expensive.

Correct

Yes. And, this can cause cell damage and shorten the life of the pack.

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