Introduction to battery-management systems- COURSERA WEEK 01 QUIZ -1.1.4 ANSWERS

 Introduction to battery-management systems- COURSERA WEEK 01  QUIZ -1.1.4 ANSWERS

Practice quiz for lesson 1.1.4

Total points 3

1.

Question 1

An battery cell stores energy as:

1 / 1 point

Nuclear potential energy

Electromagnetic energy

Gravitational potential energy

Electrochemical potential energy

Electric kinetic energy

Correct

Yes. Energy is stored in the chemical bonds between the atoms in the compounds and in the energy states of the electrons associated with the compounds in the electrodes. It is "potential" energy because it represents stored energy that has the ability to do work, but is not doing work at the present time.

2.

Question 2

In every battery cell that is not completely discharged (select all that apply):

1 / 1 point

Potential energy at the negative electrode favors a process that releases electrons into the external circuit and cations into the electrolyte

Correct

Yes. This is correct.

Potential energy at the positive electrode favors a process that accepts electrons from the external circuit and releases cations into the electrolyte

Potential difference between the cell's electrodes produces an externally measurable quantity known as cell voltage

Correct

Yes. This is correct.

The cell can be connected to an external circuit, converting stored energy into electrical kinetic energy

Correct

Yes. This is correct.

The cell can be recharged to a full state of charge by injecting energy into the cell

3.

Question 3

When a battery cell is being charged, you observe that charging current appears to be constant for a period of time while voltage is increasing, and then the magnitude of charging current decreases until it is essentially zero while voltage is kept constant. Select all that apply:

1 / 1 point

The battery cell's state-of-charge increases over the entire interval.

Correct

Yes. It increases most quickly during the first portion, but continues to increase over the second portion.

This battery cell has undergone a constant-current constant-voltage charge profile.

Correct

Yes. This is typical of a constant-current constant-voltage (CC/CV) charge profile.

This type of charging profile is used to ensure that manufacturer-specified voltage limits are not violated, in order to promote safety.

Correct

Yes. If a cell is overcharged, it poses a safety risk. One indicator of overcharge can be a voltage at the terminals that exceeds manufacturer recommendations.

The battery cell has undergone a constant-power constant-voltage charge profile.

The battery cell is fully charged after the first period of time, when voltage has reached its maximum value.