Portable Recharging System for Smart Automobiles and Mobile Platforms




About: The BCAMRL is a Mechatronics Research Lab, founded in 2014 on the campus of Bergen County Academies, a magnet high school within the Bergen County Technical School District. Students create innovations base...

Every year, extreme weather ravages across southern United States and the Caribbean, leaving millions of people without power for weeks on end. Families are left stranded without food, a warm shelter, and water. Bulky power generators are a popular choice for many in the United States, but they are far too expensive, especially for those living in poorer countries like Haiti, emit harmful greenhouse gases that pollute the atmosphere, and are a danger if misused. There are several cases each year of entire families dying as a result of carbon monoxide poisoning caused by a buildup of fumes from these generators. Introducing the Portable Recharging System for Smart Automobiles and Mobile Platforms. The low price tag, high efficiency, and eco-friendly design will make it not only popular amongst the general public, but an easy way to provide millions with temporary power from a renewable energy source. The Portable Recharging System for Smart Automobiles and Mobile Platforms attaches to any moving vehicle, such as a car or a boat, and uses the wind created by the motion of the vehicle to generate electricity. The wind forces the laterally mounted turbine to rotate, turning a small generator. The generator is attached to a battery pack, which is both reusable and removable. Families can buy several battery packs and charge them as they daily drive there family cars. Then, once a storm hits, or they need electricity at a campground or a tailgate party, they simply take one of the battery packs, and attach their devices to it. The Portable Recharging System for Smart Automobiles and Mobile Platforms will revolutionize the world with its numerous applications, ease of use, versatility, eco-friendliness, and most importantly, efficiency and inexpensiveness.

Step 1: Design a Turbine

The most important component of the system is the turbine. The usability, efficiency, and effectiveness of the device depends on the design of this one component. Therefore, I highly advise making multiple prototypes and testing them prior to implementation.


7 inches long

3 inch diameter


1. start with a curved shape resembling a wave; be sure to experiment with various designs in order to determine which best suits the environment in which the device will be used (make sure this does not exceed a height of 1.5 inches)

2. reflect the design vertically and then again horizontally in order to position as shown below

3. make a work plane 7 inches from the first sketch and use the "project geometry" tool in order to project the design onto the new plane

4. reflect the design diagonally and then horizontally in order to position it as shown below

5. use the "sweep" function while having selected both sketches in order to create the 3 dimensional helical shape (this may not always work and will sometimes result in an error message; if this occurs, rework the original wave-like shape and try the steps again)

6. create a sketch on one of the flat faces of the turbine and create a hole in the center with a diameter of 0.125 inches and a depth of 1.75 inches

7. repeat on the opposite side (these two holes will be used for mounting the turbine within the device)

My Turbine: if you cannot seem to get the design to work you can use the design I created for my device.

Step 2: Construct the Caps

In order to secure the turbine and the generator motor inside the device a specially designed aerodynamic plug must be designed. Below are the steps for designing the plugs I used.


Front Cap

1. create a circle with a diameter of 3.1875 inches

2. extrude the sketch a length of 1 inch

3. create another circle that is concentric with the prior with a diameter of 3 inches

4. extrude that sketch all the way through the original so that it makes a large hole in the object

5. create a rectangle in the center of the two circles that extends across the hole with a width of 0.75 inches

(refer to image for clarification)

6. create a circle in concentric to the first two circles with a diameter of 0.125 inches

7. extrude the circle through the object so as to create a hole

Rear Cap

1. create a circle with a diameter of 3.1875 inches

2. extrude the sketch a length of 1 inch

3. create another circle that is concentric with the prior with a diameter of 36.25 mm

4. extrude the sketch all the way through the object in order to create a hole

5. create another circle that is 2.925 cm away from the center of the previous circle and 1.75 cm in diameter

6. use the "circular pattern" tool in order to duplicate the circle around the center of the object 6 times

7. use the extrude tool in order to extrude the circles through the object and make 6 holes

I have attached the .stl files of the caps I created down below.

Step 3: Assemble the Electronics

Below are the instructions for assembling the electronics of the device. The electrical system is responsible for transporting and storing the electricity generated by the rotor as well as providing the user a way to extract the electricity via ports (on my device, I fitted a USB port)


1. connect a dc motor to the input port of the charger via the male DC adapter

2. locate the port labeled as "BATT" on the charger and connect a 3.7 V battery to it

3. locate the port labeled as "LOAD" on the charger and connect a USB Boost to it

5. connect the mini multimeter to the "LOAD" port as well

I attached the electronics to the rear of the plastic encasing of the device, however you may mount the electronics externally in order to increase aerodynamics.

Step 4: Assemble the Charging Device

The last step of the assembly process is to combine everything together into one unit.


1. begin by mounting the rotor inside the central whole of the rear cap with hot glue or other adhesive

2. attach one end of the turbine onto the rotor and insert the turbine, rotor, and cap into the plastic tube until the other end of the turbine is flushed with the end of the tube

3. insert one end of a metal prong with a diameter of 0.125 inches and a length of around 1.5 inches into the front of the turbine and the other end through the central hole of the front cap

4. push the front cap along with the turbine, rear cap, and rotor until the front of the front cap is flushed with the end of the plastic tube

5. drill two holes through the plastic tube and front cap opposite of one another and screw in a screw parallel to the central rectangle of the front cap

(refer to image for clarification)

6. repeat step 5 for the rear cap

(refer to image for clarification on the proper orientation of the screws)

Step 5: Miscellaneous Steps and Suggestions

The beauty of this portable charting device, aside from its eco-friendliness is its modularity. You can connect multiple separate devices to one circuitboard in order to increase its charging capacity. As you can see in the images, I created a unit with two turbines, but you may create and connect as many as you wish. Below are some suggestions on ad ons you can implement if you chose to create a unit with more than one entity.

Some Suggestions

1. attach small rubber feet to the bottom of the tubes in order to provide support when mounting

2. cut strips of aluminum sheet metal and wrap them around both ends of the tube in order to increase stability and physically bind multiple entities into one unit

3. attach a rubber handle to

Step 6: Supporting Documentation

Supoporting documentation for prototype design.



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    3 Discussions

    Wrrr 10-G

    1 year ago

    Sorry dude, I don't get it.


    1 year ago

    All the energy to run this generator is coming from the burning of gasoline in the car. Nothing is free. Just plug in a battery charger at home for more fuel efficient power generation. Beutifujl design work though.


    1 year ago on Step 6

    You again .

    Same question . How much useable wattage do you hope to get out of this?