ByKit

To conclude, an e-bike is efficient and environment-friendly. E-bike is integrated with an electric and electronic system that is powered through battery rather than gasoline that emits harmful gases due to which these gases are responsible for the depletion of O-zone. To start with the proj

Project Title

ByKit

Project Area of Specialization

Electrical/Electronic Engineering

Project Summary

To conclude, an e-bike is efficient and environment-friendly. E-bike is integrated with an electric and electronic system that is powered through battery rather than gasoline that emits harmful gases due to which these gases are responsible for the depletion of O-zone.

To start with the project, several ideas and experiments were implemented. All the research was done through the internet and then numerous surveys were carried out in different markets including China online markets such as Aliexpress, Alibaba and Banggood.

 The main objective was the modification in the chassis. Much of the efforts were made to changes that were necessary for electric bike parameters. Our main focus was the battery, which has to be so efficient that it can run well on high loads. So the idea came upon the installation of the li-ion battery. The Li-ion battery has a good rating for heavy loads. The second main task was to choose a motor. The motor that was required for the e-bike has to be of such ratings as to move the bike smoothly as well as it can work well on heavy loads. Alas, brush DC motor was added to preference.

The report is divided into chapters that also include results and analysis according to numerous experiments. In the first chapter, the introduction and history are mentioned regarding the development of e-bike. Electric bikes are fuel-efficient. They are powered by Li-ion batteries. Lithium-ion batteries are efficient for electric bikes.  

In the second chapter, the functionality of parts is described that how parts in e-bike works and their capabilities to deliver the mechanism; Controller, battery, motor, and e-throttle functionality and efficiency are described. The controller is rated around 36v and the rated current is 27 A. The controller includes two sections. One for battery connection and motor connection and other is used for connecting all the accessories that include electronic twist throttle, headlights, and tail lights.     

In the third chapter, all the mechanism of an e-bike is mentioned and explained through the block diagram with details of each component. The chart shows the interconnection of different parts of an e-bike. E-Throttle is connected to the controller and battery management circuit. The digital screen is connected to the controller. The battery is connected to the controller. Brush DC motor is also connected to the battery.

Project Objectives

The idea of this project highlights the importance of industrial purpose as well as the economical purpose usage of an electric bike.

• Implement the idea of using E-Bike instead of conventional bikes.
• Efficiently used in a new growth opportunity in the modern world.
• Commercial usage in industrial sectors.

Project Implementation Method

1. First of all, the engine of the 70CC motorcycle is removed. At the place of the engine, a brush DC motor is installed that plays the role of a drivetrain system for example axles used for cars, likewise DC motor will help in moving the e-bike. There is a need to control the speed of the motor and for this purpose, the electronic throttle is used to control the speed of the motor.
2. Next, the controller placed in the battery compartment (sulphuric acid battery). The controller is a hub of connection that includes connection of motor, headlamp, and e-throttle to the controller.
3. Thirdly, the batteries are placed under the seat to avoid any alteration of the motorcycle’s body, keeping it original.
4. Next, the e-throttle is connected to the controller. The controller computes the pulse sent by e-throttle, takes out power from a battery and delivers the power to the motor. The digital gauge is embedded on e-throttle with LED display for displaying:

• Speed
• Battery bar
• Time and digital compass.

      5. Next, rear brakes are installed to slow down or to stop the bike. Installation of new brake shoes is implemented as they were installed originally.

6.  Finally,  the spray paint is applied to the bike with the preference of black color.

Benefits of the Project

The e-bike has many benefits and as the global warming is increasing, the e-bike can become a solution to mitigate air pollution or at least become a part of zero emission. The e-bike is cost effective, and not much maintenance is required. 

Li-ion battery is as low maintenance battery. It has relatively low self-discharged capability and also has high energy density; it has typically twice energy density than that of standard nickel-cadmium battery. It has a light weight and has a less chance of leakage when overcharged. Beside advantages there are few limitation of that battery that it is very expensive as compared to nickel-cadmium battery about 40% high costly than nickel-cadmium battery. It has a restriction to transport, for the maintenance of voltage and current it requires protection circuit within safe limits.

Technical Details of Final Deliverable

 The first step was to synchronize the DC-brush motor to the 70 cc bike. To set the chain link in such manner that the motor and the chain does get unstable when the bike moves. While planning to fit the motor under engine’s space, couple of colleagues from mechanical engineering field helped to plan for the fitting of the motor.

After the motor is fitted under the engine’s space, next is to protect motor from dust and water. If precautions are not taken then motor would not work properly or it may burn, causing the fire from an internal stator of the motor.

 Next step was to design a foot race to place the feet on the top of the foot race in order to make rider feel comfortable while riding the e-bike. Instead of installing bike’s original foot race, custom built foot race were installed, the reason behind this is that the original foot race was difficult to install near the motor as there weren’t any drill threads or molds that can mount the original foot race, so making a custom foot race was the only option that was acceptable so far. Two steel plates were used, and they were bended and mounted near the motor in such a way that these plates act as a foot race.

Next, the battery was designed and it was planned to fit the battery under the seat, however it was not that easy the size of the battery was larger in terms of length due to which installation of the battery under the seat was quite difficult. To overcome the problem, some cuts were applied to the seat compartment of the chassis and altered the seat compartment so that the battery can be fitted under the seat easily.

Next, the fitting of the controller needs to be done. The battery compartment of the bike was compatible for controller to be fitted because it is the middle part of the bike and the connections of different wiring can take place is easily.

 Next, the E-throttle mounted at the right side of the handle bar which normally can be seen in many bikes. Along with the E-throttle a digital display is embedded that shows the speed, direction, time and the battery bar.

Finally, projection headlamp mounted at the top of the handle stem, to enable rider to see clear view of the terrain at night.

Final Deliverable of the Project

Hardware System

Core Industry

Transportation

Other Industries

Core Technology

Robotics

Other Technologies

Sustainable Development Goals

Sustainable Cities and Communities, Climate Action, Life on Land

Required Resources

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