Foreword Introduction of solar watch Encounter problems
Conclusion
Slide 3
Solar energy is a major green energy industry of this
generation. Sunlight is everywhere. If we can applied solar in all
daily needs effectively, this will bring great impact for the
Earth's environment. Time is money. The watch has become the
general accessory of the modern people. And what we want to
introduce is the first analog watch of a solar-powered. 1
Slide 4
Foreword Introduction of solar watch Encounter problems
Conclusion
Slide 5
The solar watch converts light energy into electrical energy
and then the excess energy stores in the secondary battery, replace
mercury batteries, so we do not have to exchange batteries
frequently. Good!!! Bad 2
Slide 6
1.Light breaks silicon substrate and separates electrons and
holes. 2. positive charges diffuse to P-type negative charge
diffuse to N-type. 3.It will make a Built-in field when attaching
extra load. 3
Slide 7
4
Slide 8
Cross sectional diagram of a new energy watch of solar cell
5
Slide 9
Schematic of a transparent solar cell. Cross section of the
cell 6
Slide 10
The configuration example of improving the color and appearance
7
Slide 11
8
Slide 12
Advantage high absorption Optical low cost thinner thickness
Shortcomings making defect easily 9
Slide 13
Photogenerated power by a Si solar cell 10
Slide 14
Illuminance change on a watch 11
Slide 15
Foreword Introduction of solar watch Encounter problems
Conclusion
Slide 16
In 1970- Single-crystalline silicon solar cells can make watch
operation, but battery life of only five years. So after using
amorphous silicon solar cells with electric double layer capacitor,
not only increase accuracy, but also battery life improve. 12
Slide 17
In 1986- Combination of lithium ion secondary battery with
silicon solar panels. So that the whole system as well as the
battery life to the highest state. Charge up to run for 600 hours
13
Slide 18
Now- Fully charged after four years of continuous operation
(power- saving mode), 10 atmospheric pressure waterproof. The wave
form a built-in an extremely precise wave receiver (antenna). It
can receive the radio from Japan station everyday, and correct time
and calendar Automatically. 10 million years only one second error.
14
Slide 19
Foreword Introduction of solar watch Encounter problems
Conclusion
Slide 20
Environmental protection 15
Slide 21
According to statistics, the worldwide production of about 1.5
billions watches every year, 90% of which use mercury batteries
quartz watch. A watch maker in Japan for three years, consuming a
total of 7.2 millions mercury batteries, If it stack up 16
Slide 22
Mercury pollution in China 17
Slide 23
Give me a wonderful earth~~ A devastating earth we wont expect
We want live longer~~!!!! 18