TECHNICAL FIELD
The subject matter described herein, in general, relates to a step-through two wheeled vehicle and in particular relates to an electrical system for a step through two wheeled vehicle. BACKGROUND
In order to reduce the air pollution and preserve the depleting crude oil, great attention has been given to the problem of reduction of fuel consumption in vehicles and io reduce the pollutants emitted by vehicles. Vehicles driven by electric motors were developed as one such solution proposed for the aforesaid problem. Such vehicles are powered using an electric drive system having the electric motor as a powering source, a battery pack for the electric motor and a controller. The controller manages the operations of the electric motor and the battery pack. Positioning of battery pack in the electric motor driven two-wheeled vehicle may be critical task due to limited availability of space.
Conventionally in the two-wheeled electric vehicles, the battery pack is disposed within a utility box area below the seat. Positioning of the battery pack inside the utility box leads to wastage of space that could have been used for storing other articles. This arrangement also prevents the dissipation of heat that is generated during charging and discharging of the battery pack resulting in decreased efficiency.
Therefore, there is a need to for a electrical system that is disposed in a manner which allows proper utilization of available space, and providing adequate cooling arrangement for the battery pack within the two-wheeled vehicle.

SUMMARY
The subject matter described herein relates to an electrical system for a step through two wheeled vehicle that also provides the means for effective cooling of the battery pack.
According to one aspect of the present subject matter, a step through two wheeled vehicle includes a footboard and a frame. The frame is extending longitudinally along the two wheeled vehicle. The two wheeled vehicle is provided with an electrical system underneath the footboard of the two wheeled vehicle. The electrical system comprises a plurality of battery packs. A plurality of temperature sensors are provided in the electrical system for sensing the temperature of each of the battery packs. A plurality of blowers is provided for cooling the battery packs. The electrical system further includes a controller to operate the blowers based on their temperature.
A bottom panel covers the electrical system of the electric motor driven two wheeled vehicle. The bottom panel has a plurality of louvers provided for directing air flow to the battery packs. .
'these and other features, aspects, and advantages of the present subject matter will become better understood with reference to the following description and appended claims. This summary is provided to introduce a selection of concepts in a simplified form. This summary is not intended to identify key features or essential features of the claimed subject matter, nor is it intended to be used to limit the scope of the claimed subject matter.

BRIEF DESCRIPTION OF DRAWINGS:
The above and other features, aspects, and advantages of the subject matter will become better understood with regard to the following description, appended claims, and accompanying drawings where:
Fig.l illustrates the perspective view of the scooter with respect to one embodiment of the present subject matter.
Fig.2 illustrates the position of battery packs below the footboard area of the scooter of Fig.l.
Fig.3 illustrates the side view of the electrical system of the scooter shown in Fig.l.
Fig.4 illustrates the arrangement of louvers on the bottom panel along the G-G axis, D-D axis and H-H axis of the scooter shown in Fig.l.
Fig.5 illustrales the arrangement of first louver on the bottom panel along the G-G axis of the scooter shown in Fig.l.
Fig.6 illustrates the arrangement of second louver on the bottom panel along the D-D axis of the scooter shown in Fig.l.
Fig.7 illustrates the arrangement of third louver on the bottom panel along the H-H axis of the scooter shown in Fig.l.
Fig.8 illustrates the electrical system of the scooter of the scooter shown in Fig.l.

Fig.9 illustrates the block diagram of the operation of the controller of the scooter shown in Fig. 1.
DKSCRIPTION
An electrical system positioned underneath the footboard allows effective utilization of available space and for cooling the battery pack is described. The electrical system is placed beneath the frame of the two wheeled vehicle. The frame extends longitudinally along the two wheeled vehicle further includes a footboard attached to the frame.
The electrical system includes one or more battery packs, temperature sensors, blowers and a controller. The temperature sensors measure the temperature of the battery packs. Each of the temperature sensors can be mounted on each of the battery pack. The blowers are provided in the front portion of the battery packs and are attached to the frame of the two wheeled vehicle. The controller regulates the operation of the blowers based on the temperature of the battery packs measured by the temperature sensors.
The electrical system of the two wheeled vehicle is covered by a bottom panel of the two wheeled vehicle. The bottom panel includes a plurality of louvers for allowing the entry of air. The louvers are placed angularly on the bottom panel to allow the entry of air when the two wheeled vehicle is in motion and thus provides natural cooling to the battery pack.
A step through two-wheeled vehicle comprises a frame that extends longitudinally along the two wheeled vehicle. The vehicle further include a footboard extending

downwardly and longitudinally of the frame, an electrical system that is provided underneath the footboard and a bottom panel for covering the electrical system. The bottom panel has a plurality of louvers that are provided on the surface of the bottom panel in order to allow entry of air through louvers. The electrical system includes a plurality of battery packs, a plurality of temperature sensors, a plurality of blowers and a controller. Each temperature sensor senses the temperature of each one of corresponding battery packs. Blowers are provided in the forward portion of battery packs and provide a movemenl of cooling air towards each of battery packs respectively. The controller selectively operates blowers based on an output from the temperature sensors.
In accordance with one aspect of the present subject matter, the footboard is attached to the frame.
In accordance with another aspect of the present subject matter, the louvers are placed at an angle of 45 degree with respect to the bottom panel.
In accordance with another aspect of the present subject matter, each blower is attached to the frame separately.
In accordance with another aspect of the present subject matter, the temperature sensors and the blowers are connected to the controller through a plurality of connectors.
In accordance with another aspect of the present subject matter, the output of temperature sensor is 40 degrees Celsius.

Fig. 1 illustrates a perspective view of a scooter with respect to one embodiment of the present subject matter. The embodiments disclosed herein are described in the context of a scooter. However, the embodiments and the subject matter herein can also be applied to other vehicles, such as motorcycle type two or three-wheeled vehicles, all terrain vehicles, and other vehicles with more than two wheels.
As used herein, the terms "front", "rear", "left", "right", "up", and "down", correspond to the direction assumed by a driver of the vehicle. The scooter 100 is configured for accommodating two persons, a rider and a pillion. The scooter 100 includes a frame 105, a seat 110, a front wheel 115, a rear wheel 120, a footboard 125, an electric motor and a transmission means to turn the wheels of the scooter 100. The scooter 100 further includes an electrical system 130 disposed underneath the footboard 125 of the scooter 100,
The terms 'scooter' and 'two wheeled vehicle' are hereinafter interchangeably used.
Fig.2 illustrates the position of battery packs below the footboard area. As shown, the chassis tubes 205, 210 and 215 are disposed between the footboard 125 of the scooter 100 and a bottom panel 220. The battery packs 225, 230, and 235 are placed between the chassis tubes 205, 210 and 215 below the footboard 125 area of the scooter 100. Each of the battery packs 225, 230 and 235 has a mounted temperature sensor 240, 245 and 250 respectively for measuring their related temperature.
Fig.3 illustrates the side view of the electrical system. A plurality of louvers 305 are provided on the surface of the bottom panel 220 of the scooter 100. The plurality of

louvers 305 allow entry of air within the electrical system 130 to provide natural cooling of each of the battery pack 225, 230 and 235 when the scooter 100 is in running condition.
Fig.4 illustrates the arrangement of louvers on the bottom panel along the G-G axis, D-D axis and H-H axis. As shown in figure 4, three set of louvers (collectively referred to as louvers 305) are provided on the surface of bottom panel 220 of the scooter 100. The louvers 305 are preferably placed at an angle of 45 degree with respect to the bottom panel 220 of the scooter 100. The first set of louvers 305/1 is formed on the bottom panel 220 of the scooter 100 along the H-H axis. The second set of louvers 305/2 is formed on the bottom panel 220 of the scooter 100 along the D-D axis. The third set of louvers 305/3 is formed on the bottom panel 220 of the scooter 100 along the G-G axis. The louvers 305 allow the entry of air to provide natural cooling of the battery packs 225, 230 and 235 when the scooter 100 is in motion. It would be appreciated by a skilled person that the angle of the louver 305 can be changed so as to adjust the rate of air flow to the battery pack 225, 230 and 235.
Fig.5 illustrates the arrangement of first louver on the bottom panel along the axis G-G. The first set of louvers 305/1 covers the first battery pack 225 and is formed on the bottom panel 220 of the scooter 100 at an angle of preferably 45 degrees along the axis G-G. The first set of louvers 305/1 allows the entry of air when the scooter 100 is in motion directing the air flow to the first battery pack 225. The first louver 305/1 can be formed at an angle between 0 to 90 degrees on the surface of the bottom panel 220 of the scooter 100. Similarly the second set and the third set of louvers 305/2 and 305/3 are arranged so as to direct the air flow to the second and the third battery packs 23Q and 235.

The structure of the second and the third louver 305/2 and 305/3 is depicted in Fig. 6 and Fig. 7 respectively.
Fig.8 illustrates the electrical system of the scooter. The first temperature sensor 240, the second temperature sensor 245, and the third temperature sensor 250 are connected to a controller 805 by means of connectors 810.
Blowers 815, 820, and 825 are attached to the frame 105 of the scooter 100 and are connected to the controller 805 through connectors 810. The blowers 815, 820, and 825 arc provided in the forward portion of the battery packs 225, 230, and 235
respectively to provide a forced movement of cooling air.
The temperature sensors 240, 245, and 250 measures the temperature of the first battery packs 225, 230, and 235 respectively. Based on the temperature of the battery packs 225, 230, and 235 the controller 805 operates one or more of the blowers 815, 820 or 825.
Fig.9 illustrates the block diagram of the operation of the controller. The block diagram illustrates the circuitry to operate the first blower 815, the second blower 820, and the third blower 825. The circuitry includes a thermistor 905 comprising a first temperature sensor 240, the second temperature sensor 245, and the third temperature sensor 250 to measure the temperature of the first battery pack 225, the second battery pack 230, and the third battery pack 235. The current output of the thermistor 905 is given to a signal conditioner 910. The signal conditioner 910 filters the electrical noises from the output signal of the thermistor 905 and the filtered output is given to a comparator 915. The comparator 915 compares the output of thermistor 905 with a

threshold value. When the output of thermistor 905 exceeds the threshold value, the comparator 915 triggers the electrical switch 920 and thus operate the blower 925 comprising the first blower 815, the second blower 820 and the third blower 825. The first blower 815, the second blower 820, and the third blower 825 will therefore provide the movement of cooling air to the first battery pack 225, the second battery pack 230, and the third battery pack 235 respectively. In the present embodiment, the predetermined threshold value is 40 degree Celsius.
The subject matter described herein is not limited to motor driven scooter type vehicle. Rather, the subject matter described herein can be applied to any other vehicle using any other power source, and more particularly to small wheeled vehicles like motorcycles.
Although the subject matter has been described in considerable detail with reference to certain preferred embodiments thereof, other embodiments are possible. As such, the spirit and scope of the appended claims should not be limited to the description of the preferred embodiment contained therein

We Claim
1, A step through two-wheeJed vehicle JOO, said two wheeled vehide 100 comprising:
a frame 105 extending longitudinally along said two wheeled vehicle 100;
a footboard 125 extending dovt'nwardly and longitudinally of said frame 105,
an electrical system 130 provided underneath said footboard 125;
a bottom panel 220 for covering said electrical system 130, wherein said bottom
panel 220 has a plurality of louvers (305/1, 305^ and 305/3) provided on the
surface of said bottom panel 220 allowing entry of air through said louvers
(305/1, 305/2 and 305/3);
said electrical system 130 comprises:
a plurality of battery packs (225, 230 and 235);
a plurality of temperature sensors (240, 245 and 250) wherein each of said
temperature sensor (240, 245 and 250) is sensing the temperature of each
of said battery packs 225, 230 and 235 respectively;
a pluraiily of blowers (815, 820 and 825) provided in the forward portion
of said battery packs 225, 230 and 235, wherein each of said blowers (815,
820 and 825) provide a movement of cooling air towards each of said
battery packs (225, 230 and 235) respectively;
a controller 805, wherein said controller 805 selectively operates said
blowers (815, 820 and 825) based on an output from said temperature
sensors (240, 245 and 250).

2. The two wheeled vehicle 100 as claimed in claim 1, wherein said footboard 125 is
attached to said frame 105.
3. The two wheeled vehicle 100 as claimed in claim 1, wherein said louvers (305/1,
305/2 and 305/3) are placed at an angle of 45 degree with respect to the bottom
panel 220,
4. The two wheeled vehicle 100 as claimed in claim 1, wherein each of said blowers (815, 820 and 825) are attached to said irame 105.
5. The two wheeled vehicle 100 as claimed in claim 1, wherein said temperature sensors (240, 245 and 250) and said blowers (815, 820 and 825) are connected to said controller 805 through a plurality of connectors 810.
6. The two wheeled vehicle 100 as claimed in claim 1, wherein said output of
temperature sensors (240,245 and 250) is 40 degrees Celsius.