This is all about design and fabrication of E-bike. I hope this is helpful for all engineering student.

1. The project Report
Entitled
ELECTRIC BICYCLE(E-BIKE)
Submitted in
Partial Fulfillment of the Requirements for the Award of the Degree of
Bachelor of Technology
In
Mechanical Engineering
Presented by:-
Shivam shukla(1642240116)
SRIJIT DWIVEDI(1742240911)
KRISHNA YADAV(1642240061)
ANAND YADAV (1642240018)
IMRAN AHMAD (1642240052)
Guided by:-
Mr. adarsh patel
(Assistant professor)
2019-2020
Mechanical Engineering Department
BANSAL INSTITUTE OF ENGINEERING & TECHNOLOGY
Lucknow-226021, UP, India

2.  INTRODUCTION
 ELECTRIC BIKE CLASSIFICATION
 IMPORTANT KITS OF E-BIKE
 E-BIKE WITH PADEL ASSIST ONLY
 MAIN COMPONENTS OF E-BIKE
 POSITION OF ALL COMPONENT FITTING
 CONSTRUCTION DETAILS
 DESIGN SPECIFICATION OF ALL COMPONENT (SOLIDWORKS DESIGN)
 COMPONENTS DISCRIPTION
 WORKING PROTOTYPE
 BLOCK DIAGRAM
 ADVANTAGES
 CONCLUSION

3.  An electric bicycle, also known as an e-bike or booster bike, is a bicycle with an
integrated electric motor which can be used for propulsion.
 There is a great variety of e-bikes available worldwide, from e-bikes that only
have a small motor to assist the rider's pedal-power to somewhat more powerful e-
bikes which tend closer to moped-style functionality.
 E-bikes use rechargeable batteries and the lighter varieties can travel up to 25 to
32 km/h (16 to 20 mph), depending on the laws of the country in which they are
sold. While the more high-powered varieties can often do in excess of 45 km/h
(28 mph).

4.  Despite these legal complications, the classification of e-bikes is mainly decided
by whether the e-bike's motor assists the rider using a pedal-assist system or by
a power-on-demand one.
 Definitions of these are as follows:
Pedal-assist
 The electric motor is regulated by pedaling.
 The pedal-assist augments the efforts of the rider when they are pedaling.
 These e-bikes – called pedelecs – have a sensor to detect the pedaling speed, the
pedaling force, or both.
 Brake activation is sensed to disable the motor as well

5. Power-on-demand
 The motor is activated by a throttle, usually handlebar-mounted just like on most
motorcycles or scooters.
 They are also useful when it would be helpful for the riders who more generally
need some assistance.
Therefore, very broadly, e-bikes can be classed as:
1. E-bikes with pedal-assist only
2. E-bikes with power-on-demand and pedal-assist
3. E-bikes with power-on-demand only

7.  E-bikes with pedal-assist only
It can be classified into two legal E-bikes
 pedelecs (legally classed as bicycles) or
 S-Pedelecs (often legally classed as mopeds)
 Pedelecs: have pedal-assist only, motor assists only up to a decent but not
excessive speed (usually 25 km/h), motor power up to 250 watts, often legally
classed as bicycles
 S-Pedelecs: have pedal-assist only, motor power can be greater than 250 watts,
can attain a higher speed (e.g., 45 km/h) before motor stops assisting, legally
classed as a moped or motorcycle (not a bicycle)

8.  Dc motor:-
type - BLDC or PMDC
Rating - 24v DC
Power – 200-250W
Weight – 2-3 kg
 Battery:-
Rating – 12V, 24AH
Weight – 4-5 kgs
 Alternator:-
Rating – 12VDC
Available with – voltage regulator
and rectifier

14. Sprockets:
The chain with engaging with the sprocket converts rotational power in
to rotary power and vice versa. The sprocket which looks like a gear
may differ in three aspects:
 Sprockets have many engaging teeth but gears have only one or two.
 The teeth of a gear touch and slip against each other but there is
basically no slip page in case of
sprocket.
 The shape of the teeth are different in gears and sprockets

22.  The 150 watt PMDC motor which gives a 1000 RPM at 12V and 15A rating was
linked with a flywheel using the sprocket ratio at 16:40 (motor : flywheel) teeth
ratio, the shaft from the flywheel was then linked to the sprocket on the other side
with a housing. The drive from this sprocket to the multi crank freewheel is
attached again at 16:52(sprocket: crank freewheel) teeth ratio. These ratios were
selected for maximum efficient power transmission with minimal loss.
 The drive from this crank is directly linked with rear wheel sprocket that facilitates
its motion. When the motor is switched ON, the motor draws current from the two
dry cell batteries connected in parallel that would give an effective discharge of
12V and 14A. Since the motor uses maximum current (11 amp) during starting a
battery of that specification was used. Later on as the effective speed increases the
current drawn reduces to 1.77A. Figure shows the final assembled prototype of the
hybrid bicycle

24.  In electric bike can use the bicycle infrastructure, park in bicycle areas,
ride on sidewalks and bike paths.
 This allows for much faster movement in congested downtown areas.
 Electric bicycles also allow the rider to pedal and get exercise in time
they normally spend commuting.
 No fuel required.
 Health benefits.
 Pollution free ride.
 Less parking space required .
 No age limit to ride the e bike.

25.  The issues associated with electric bicycles may be addressed by custom-
designed drives that are most efficient over a given operating cycle.
 These include city bicycles, hill bicycles, distance bicycles, and speedy
bicycles.
 The results of the studies listed here can serve as a platform to improve
electric bicycle performance if new drive systems are designed around key
parameters that will result in improvement of the system performance.
 Furthermore, they can be used for comparison of existing drives in a
systematical, comprehensive, and technical way.