Charging Battery with Clean Energy By Mr. Raksapol Thananuwong - - PowerPoint PPT Presentation

Charging Battery with

By Mr. Raksapol Thananuwong

Senior Academic Staff

The Institute for the Promotion of Teaching Science and Technology (IPST), Thailand

Clean Energy

Raksapol Thananuwong

• BA in Physics and Math
• MSc in Physics
• Working at IPST since Oct 2008
• Consulting on various projects, e.g. House of Little Scientist, Thailand; TV game show Wittaya-

Supprayut; Science and Technology Conference for Youth, Thailand, etc.

• Manager of Thai student teams in international science and mathematics competitions, e.g.

International Physics Olympiad, International Conference of Young Scientists

• Design and develop learning materials (textbooks, ebooks, digital learning modules),

curriculum, STEM activity, assessments, etc.

• Conduct research on the effectiveness of learning materials, STEM activity.

Working Experience

Goals of the workshop

To answer two questions

1.How to effectively deliver STEM lesson in a classroom? 2.How to assess STEM learning outcomes?

Through

Doing example activity: Charging Battery with Clean Energy

Outline

• 1. Getting to know battery
• 2. Charging battery with solar energy and pedal power
• 3. Design your innovative device and present your work
• 4. Discussion & Summary

Clean Energy

1.

Write down one word for each box until all boxes are filled

2.

Listen to the questions asked by the workshop trainer and then mark  in the box that has a word corresponding to the correct

• answer. If there is no answer, do not mark any box.

3.

When you get three marked boxes in a row, column or in diagonal, shout “Bingo!”

Questions

• 1. What type of energy that a battery converts into electrical energy?
• 2. What device that most power plants use to produce

electricity from a rotating motion?

• 3. What type of electric current produced by a solar panel?
• 4. What we need in order to store solar energy for night time use?
• 5. What type of electric current produced by a wind turbine?

Questions

• 6. What could effect the energy output of a solar panel?
• 7. What type of energy that a wind turbine converts into

electrical energy?

• 8. What is the term that indicates the ratio of energy output

by a solar cell to energy input from the sun?

• 9. What electrical quantities would allow a battery to be

charged more quickly?

Main Objective of the Activity

 To apply knowledge and skills in electricity, battery,

generator, mathematics and energy technology to design and develop devices that could efficiently charge battery with clean energy.

Thai Science Curriculum

 Search and give examples of chemical reactions in everyday life and specify the

conditions or factors for their occurrence.

 Search and present examples of the application of energies from chemical reactions.

Physics

 Conduct activity and explain how an electromotive force is induced and give some

examples of how this understanding can be applied in daily life.

 Search and explain alternative energy and the effects of using renewable energy on

the environment.

 Search and explain the conversions of nuclear energy and solar energy into

electricity.

Chemistry

Thai Curriculum

 Safely construct objects and utensils or methodologies in accord with

the technological process by conveying ideas through an image and models, leading to constructing work pieces or conveying concepts of the methodology through models, and reporting on results by using or presenting achievements.

 Analyze and choose to creatively apply technologies suitable to daily life

for the benefit of life, society and the environment, and sustainably mange technologies through methodology of clean technologies.

Design and Technology

Scenario

In the near future, scientists have predicted that natural hazards will become more severe and more frequent, as a result of climate change; and our main energy sources – oil, coal, natural gas – will be scarce. We have to prepare to be in a situation that we are facing some natural hazards without power for unexpected length of hours or days.

Outline

• 1. Getting to know battery
• 2. Charging battery with solar energy and pedal power
• 3. Design your innovative device and present your work
• 4. Discussion & Summary

What is battery?

Activity 1: Getting to know battery

 History of a battery  Types of battery

• 1. Each member of the group chooses one topic she or he likes. If not all topics are

chosen, ask for volunteer to take the remaining one(s).

• 2. Go to join with other members of other group who choose the same topic and in 5

minutes, read and do the worksheet of that topic.

• 3. After 5 min, go back and share what you learn within your group for 5 min.
• 4. Fill in the Worksheet of Activity 1 and have one person present what the group has

learned about battery in 1 – 2 minutes.

 Definition and the underlying science of a battery.  How to efficiently and safely use battery?

Activity 1: Summary

Battery is a device that consists of one or more

electrochemical cells in which chemical energy is converted into electricity.

The main components of a battery is cathode,

anode, electrolyte and separator.

Outline

• 1. Getting to know battery
• 2. Charging battery with solar energy and pedal power
• 3. Design your innovative device and present your work
• 4. Discussion & Summary

 Part 1: Learn basic knowledge of solar

cells by watching a clip, reading and answering question in the Part 1 of Activity 2 worksheet.

 Part 2: Study the factors that affect the

• utput of a solar cell by doing activity in

Part 2 of Activity 2 Worksheet.

Activity 2:

Charging Battery with Solar Energy

Safety considerations: Watch for heat from a lamp.

Mono Crystalline 12 – 15% Poly Crystalline 11 – 14% Thin Film 7 – 10%

Activity 2: Part 1 Basic Knowledge of Solar Cell

How does a solar cell work?

Activity 2:

Part 2 Factors affecting Solar Cell’s Output

 Study the factors that affect the output of a solar cell by

doing activities in Part 2.

Safety considerations: Watch for heat from a lamp

 A typical solar cell is a device consisting of two layers of

different materials which have different electrical properties, giving rise to electric field at the junction between two layers.

 When sunlight hits the cell, solar cell’s atoms will absorb

• energy. Some electrons of the atoms those have enough

energy will become free electrons and will be pushed by the electric field at the junction to move through a wire that connects to an appliance, creating electric current.

Activity 2: Summary (1/2)

 Tilt angle, area exposed to

light and temperature are factors that affect solar cell’s electrical output.

 To charge a mobile phone battery using solar

cells, the voltage of the solar cells must be

about the same as that of a battery.

Activity 2: Summary (2/2)

Break

Calculate the cost of charging a mobile phone.

A mobile phone’ s battery has 2,000 mAh

capacity and 3. 8 V nominal voltage.

If we charge the battery once a day, from

0%- 100%, in a year, how much do we have to pay for the cost of charging the battery?

Freshen-up Activity

**The cost of electricity is 2 bahts/unit or about 5 cents/unit.

Answer

A mobile phone’ s battery has 2,000 mAh capacity and 3.8 V nominal voltage. The energy consumed if it is fully charge is

E = P  t = V I  t = 3.8 V  2 Ah= 7.6 Wh

Convert to Unit: 7.6 Wh = 0.0076 kWh = 0.0076 Units In 1 year, there are 365 days. The total energy consumed in a year would be

365  0.0076 = 2.77 Units

The cost of electricity is 2 bahts/Unit and so in 1 year, the cost of charging

the phone’s battery would be 2.77  2 = 5.54 bahts (16cents).

 Part 1: Learn basic knowledge of a

generator and electronics related to charging battery with pedal power.

 Part 2: Build a prototype of a pedal

power charger and run a test.

Activity 3:

Charging Battery with Pedal Power

Activity 3:

Part 1 Basic Knowledge of a Generator and Electronics

 Read and respond to questions in Part 1 of Activity 3

Worksheet.

Faraday’s Law of Induction: An electromotive

force (emf) is induced in a loop when the magnetic flux through the loop changes with time.

A simple AC generator consists of a loop of wire

rotated by some external force in a magnetic

• field. The ends of the loop are connected to slip

rings that rotate with the loop. The rings are in contact with stationary metallic brushes which connect to external circuit.

How does a generator work?

What electronics components we need in order to charge battery with pedal power?

Bridge rectifier Capacitor IC voltage regulator

Breadboard

USB port (male and female)

Activity 3:

Part 2 Build a prototype of a pedal power charger and

run a test.

 Follow instruction in Part 2 of

Activity 3.

 When you finish making a

prototype, have the instructor check and approve before running a test.

 A generator is a device that converts

mechanical energy to electrical energy. It’s

• peration is based on Faraday’s law of

induction.

 To charge battery using energy from

pedaling a bicycle, some electronics components are needed, such as capacitor, bridge rectifier, IC voltage generator, etc.

Activity 3: Summary

Outline

• 1. Getting to know battery
• 2. Charging battery with solar energy and pedal power
• 3. Design your innovative device and present your work
• 4. Discussion & Summary

Activity 4:

Design a Battery Charger Scenario

In the near future, scientists have predicted that natural hazards will become more severe and more frequent, as a result of climate change; and our main energy sources – oil, coal, natural gas – will be

• scarce. We have to prepare to be in a situation that

we are facing some natural hazards without power for unexpected length of hours or days.

 In 15 minutes, discuss within your group, about the

design of a battery charger.

 Draw your group’s design in a flip chart paper and

prepare to present it to the class.

 The charger must meet the following requirements.

Activity 4:

Design a Battery Charger

Activity 4: Design a Battery Charger

Requirements

Duration

15 minutes

Budget

500 bahts

Energy Sources

At least, two types of clean energy sources

Efficiency

The more amount of energy a charger can deliver to a 5-V battery in 5 minutes, the higher the score.

Usage

Safe; not causing any damages to a battery or an appliance; easy to use, install and maintain; durable.

 The device must not be a copy of any devices

found in the internet or elsewhere.

 While designing and developing, keep in mind the

scoring rubric given at the end of the worksheet.

Activity 4:

Design a Battery Charger

Outline

• 1. Getting to know battery
• 2. Charging battery with solar energy and pedal power
• 3. Design your innovative device and present your work
• 4. Discussion & Summary

Discussion

What make this STEM education activity different from

• ther learning activities?

 Connecting to a real-world situation  Emphasizing 21st Century skills (communication,

collaboration, critical thinking, creativity)

 Having no one right answer  Requiring a product to be designed and created

Engineering Design Process

Identify a Challenge Explore Ideas Present the Solution Plan and Develop Test and Evaluate Engineering Design Process

Journal

Discussion

From research,** effective strategies for designing STEM activity are:

 Being explicit in integration.  Supporting students in eliciting, connecting and reorganizing ideas.  Promoting active learning (conversation, argument, worksheet recording, etc.)  (teacher) Providing support and guidance for students  Allowing enough time for students to develop interest and identity.  Having flexible learning environment (project- and problem-based learning)

** National Academy of Engineering and National Research Council. (2014). STEM Integration in K-12 Education: Status, Prospects, and an Agenda for Research. Washington, DC: The National Academies Press.

Discussion

What evidences we have obtained from the activity and how can we use them for assessment?

Discussion

Sources of Evidences

Learning Outcomes Tools/Methods

Worksheet Knowledge and understanding, critical thinking skill, communication skill , science process skills Rubric Discussions Collaboration skill, knowledge, Observations Journal Math skill, knowledge, critical thinking skill, creativity, ICT Rubric Presentation Communication skill, knowledge and understanding, critical thinking skill, creativity, ICT Observations, rubric Product Problem-solving skill, creativity Rubric

Summary (1/2)

Relevant and real-world Work and learn together Challenging Students are responsible for their own learning Skills and attitude for the fast changing world

Source: Future of Job Report, World Economic Forum

Summary (2/2)

Biology

Help make explicit connections between disciplines Have flexible learning environment Attend to both conceptual ideas and social aspects Be supportive in the development of identity and interest

Thank You

• Mr. Raksapol (Jay) Thananuwong

E-mail: rthan@ipst.ac.th