Introduction to battery-management systems- COURSERA WEEK 03 QUIZ -1.3.5 ANSWERS

 Introduction to battery-management systems- COURSERA WEEK 03 QUIZ -1.3.5 ANSWERS

Practice quiz for lesson 1.3.5

Total points 3

1.

Question 1

Consider a 0.1m$\Omega$ current-sensor shunt, connected via an amplifier with gain factor of 100 to an analog-to-digital converter. If the measured voltage is 1V, what amount of electrical current is passing through the shunt (in A)? Round your answer to the nearest A.

1 / 1 point

100

Correct

Yes. The shunt voltage is $0.0001 \times 100 = 0.01$V. Multiplied by 100, this gives the A2D reading of $1$V.

2.

Question 2

What is the primary advantage to using a current-sensor shunt instead of a Hall-effect sensor?

1 / 1 point

The shunt-sensor voltage can be measured directly by the battery-management system without specially designed circuitry

Shunt measurements are not affected by temperature, and so it is simple to use shunts for battery systems that must operate over wide temperature ranges

Shunts have no measurement offset at zero current, so are good to avoid drift in coulomb counting

Current-shunt sensors are electrically isolated from the battery pack, so no special isolation circuitry is needed

Correct

Yes. This is the primary advantage of the shunt sensing method (and it can be a very large advantage).

3.

Question 3

What is the primary advantage to using a Hall-effect current sensor instead of a shunt current sensor?

1 / 1 point

Hall-effect sensors do not require a four-wire Kelvin connection in order to measure battery-pack current

Hall-effect sensors are more precise than shunt current sensors

Hall-effect sensors are electrically isolated from pack current, so no special isolation circuitry is needed

Hall-effect sensors have no measurement offset at zero current, so are good to avoid drift in coulomb counting

Correct

Yes. This is the primary advantage of using a Hall-effect sensor.