Claims:WE CLAIM:

1. An electric two-wheeler, comprising: a frame or chassis 5 wrapped around a battery box by means of at least three fixing members 5a, 5b, 5c, wherein the battery box is formed by an integration of a upper half 4, a middle half 3 and a lower half 2 connected together by one or more coupling means.

2. The electric two-wheeler as claimed in claim 1, wherein the battery box, is preferably an ingress protection level 67, having a power connection tab 1, an auxiliary connection 31 mounted on the upper half 4 or on the middle half 3 or on the lower half 2, and a main fuse 11.

3. The electric two-wheeler as claimed in claim 1, wherein the battery box is comprised of a battery cell, a motor controller and a charger.

4. The electric two-wheeler as claimed in claim 1, wherein the battery box comprise a main fuse 11 placed at least in one of the upper half 4 or the middle half 3 or the lower half 2.

5. The electric two-wheeler as claimed in claim 1, wherein the battery box comprise at least a controller placed at least in the middle half 3 acting as a heat sink for heat dissipation.

6. The electric two-wheeler as claimed in claim 1, wherein the battery box comprise at least a charger placed at least in the lower half 2 acting as a heat sink for effective heat dissipation.

7. The electric two-wheeler as claimed in claim 1, wherein the battery box is mounted in the frame 5.

8. The electric two-wheeler as claimed in claim 1, wherein the frame 5 comprises a neck 9 adapted to mount a front steering axle and wheel assembly, a sub- frame 7, a main frame 5, a swing arm mounting means 10, and a rear suspension mount 6 on chassis.

9. The electric two-wheeler as claimed in claim 1, wherein the upper half 4, preferably a charging compartment, is open to atmosphere and adapted to accommodate charger and implement forced air cooling while charging.

10. The electric two-wheeler as claimed in claim 1, wherein the frame or chassis 5 wrapped around the battery box is characterized in that such placement of frame and battery box effectively maintains centre of gravity of the electric two-wheeler, provides effective heat dissipation to surrounding, maintains temperature in high ambient temperature zone while charging. , Description:IMPROVED ELECTRIC TWO-WHEELER

FILED OF INVENTION
[0001] The invention relates generally to the field of plug-in electric vehicles with two or three wheels powered by electricity, and in particular to electric two-wheelers. More specifically, the invention relates to frame and battery box positioning in electric two-wheelers.

BACKGROUND
[0002] An electric bicycle, also known as an e-bike or electric bike, is a bicycle with an integrated electric motor which can be used for propulsion. There are a great variety of e-bikes available worldwide, from e-bikes that only have a small motor to assist the rider's pedal-power (i.e., pedelecs) to somewhat more powerful e-bikes which tend closer to moped-style functionality, however, retain the ability to be pedaled by the rider. E-bikes uses 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). In some markets, such as Germany, they are gaining in popularity and taking some market share away from conventional bicycles, while in others, such as China, they are replacing fossil fuel-powered mopeds and small motorcycles. E-bikes are the electric motor-powered versions of motorized bicycles, which have been around since the late 19th century.
[0003] The long evolution that bike frames have undergone has resulted in relatively standard forms according to their use, which offer a satisfactory compromise between several criteria. Among these criteria, mention can be made in particular of the stiffness of the frame, its light weight, its practical character for the use in question and its geometric characteristics, which have a significant effect on the dynamic behavior of the bike. The recent appearance of two-wheelers with electric motors, whether simply to assist pedaling or as a principal means of propulsion, of course requires a battery to be carried, which is a particularly heavy element and has a degree of sensitivity to shocks. The integration of a battery in a frame having one of the configurations usual for bikes poses problems.
[0004] Among the solutions currently retained, it is known to place an elongated-shape battery behind the seat tube. This solution is not entirely satisfactory in particular because it displaces the centre of gravity and requires a substantial modification of the seat stays, hence there is a risk of structural weakness of the frame at this level. It is also not entirely satisfactory for producing an easily detachable battery system.
[0005] Another solution is to house a battery in an enlarged hub of one, or even both, of the wheels. The behavior of the bike is then not significantly changed and its structure is almost identical to that of a normal bike, which guarantees a satisfactory strength and behavior. However, this solution requires a design of the batteries and their connections that makes them substantially more expensive. Moreover, in this case, it is almost impossible to produce a detachable assembly allowing the user to remove and replace it easily. Urban users very often do not have power supply means allowing the bike to be recharged in its parking space. They are therefore forced to remove and re-place the battery to recharge it at home.
[0006] It is evident from the above that, in order to achieve higher efficiency and reliability of the electric motor and other components of the electric vehicle the placement or position of the motor on the vehicle plays a vital role. The prior-art document US6341660B1 provides an electric vehicle that is easy to start to move even when there is load applied, and which does not generate rotational resistance of the electric motor when the vehicle is push-walked. A connection/disconnection mechanism is provided between the electric motor and the speed reducing mechanism to switch transmission of the rotating driving force from a disabled state to an enabled state when the electric motor rotates at a predetermined rotation speed or more. The connection/disconnection mechanism is a centrifugal clutch. The swing arm is configured as a cantilever-type, supported only at the left side in the vehicle width direction, so that the centrifugal clutch, the electric motor, and the speed reducing mechanism are arranged in this order, from the left side in the vehicle width direction.
[0007] The prior-art document US6341660B1 provides a propulsion unit rotating shaft for single track or multiple track vehicles, driven by an electric motor, particularly for motor scooters with a driving motor, which is disposed in the region of one end of an extended rotating shaft housing and constructed as an electric motor, and a hub, which is mounted rotatably in the region of the other end of the rotating shaft housing and is intended to hold a driving wheel of the vehicle. The driven shaft of the driving motor, which is passed into the rotating shaft housing, is positively coupled with the wheel hub of the driving wheel of the vehicle by a transmission device, encapsulated in the housing for the rotating shaft, and facilities are provided for the pivotable mounting of the housing of the rotating shaft about an axis at a distance from the axis of rotation of the wheel hub and extending parallel to it at or in the frame or chassis of the motor-driven vehicle. In the transmission train between the driving motor and the wheel hub, at least one overriding clutch is provided, which cancels the positive coupling between the drive shaft of the driving motor and the driving wheel of the vehicle, when the driving moment, initiated in the transmission device by the driving motor, is smaller than a torque, acting from the driving wheel of the vehicle over the wheel hub on the transmission device.
[0008] The prior-art document EP2447145A1 provides an electric drive for a bicycle. The electric drive comprises an electric motor and a contact roller having an outer contact surface. The motor comprises a stator having plurality of stator coils as well as corresponding magnetic rotor elements. The rotor elements are fixedly attached to an inner surface of the contact roller. According to the invention, the contact roller encloses the stator. Particular embodiments provide a mounting assembly for mounting the electric drive to the bicycle's frame, preferably at a component of the bicycle adapted for mounting a kickstand recess.
[0009] Whereas there is certainly nothing wrong with existing electric vehicles, nonetheless, there exists the need for frame and battery box positioning in electric two-wheelers to improve the current state of electric motorcycle construction and make an efficient design that limits the aforementioned drawbacks of the conventional configurations and reduces the overall efficiency of the electric motor.

SUMMARY
[0010] One object of the present disclosure is to improve the integration of a battery in an electric two-wheeler, having the aim of improving the current state of electric motorcycle construction and make an efficient design in relation to one or other of the problems mentioned above.
[0011] Another object of the present disclosure is to an improved frame and battery box positioning in electric two-wheelers to improve the current state of electric motorcycle construction and make an efficient design.
[0012] An aspect of the present disclosure relates to an electric two-wheeler, comprising a frame or chassis wrapped around a battery box by means of at least three fixing members, wherein the battery box is formed by an integration of a upper half, a middle half and a lower half connected together by one or more coupling arrangement.
[0013] In an aspect, the battery box, is preferably an ingress protection level 67, having a power connection tab, an auxiliary connection mounted on the upper half or on the middle half or on the lower half, and a main fuse.
[0014] In an aspect, the battery box is comprised of a battery cell, a motor controller and a charger.
[0015] In an aspect, the battery box comprise at least a controller placed at least in the middle half acting as a heat sink for heat dissipation.
[0016] In an aspect, the battery box comprise at least a charger placed at least in the lower half acting as a heat sink for effective heat dissipation.
[0017] In an aspect, the battery box is mounted in the frame.
[0018] In an aspect, the frame comprises a neck adapted to mount a front steering axle and wheel assembly, a sub- frame, a main frame, a swing arm mounting means 10, and a rear suspension mount on chassis.
[0019] In an aspect, the upper half, preferably a charging compartment is open to atmosphere and adapted to accommodate charger and implement forced air cooling while charging.
[0020] Other embodiments of the invention are disclosed herein. The foregoing and other features, utilities and advantages of various embodiments of the invention will be apparent from the following more particular description of the various embodiments of the invention as illustrated in the accompanying drawings and claims.

BRIEF DESCRIPTION OF DRAWINGS
[0021] The accompanying drawings are included to provide a further understanding of the present disclosure, and are incorporated in and constitute a part of this specification. The drawings illustrate exemplary embodiments of the present disclosure and, together with the description, serve to explain the principles of the present disclosure.
[0022] Figure 1 illustrates a side view of a general positioning of battery box and frame in accordance with one embodiment of the present disclosure.
[0023] Figure 2 illustrates a front view of a general positioning of battery box and frame in accordance with one embodiment of the present disclosure.
[0024] Figure 3 illustrates a back view of a general positioning of battery box and frame in accordance with one embodiment of the present disclosure.
[0025] Figure 4 illustrates a battery box having an auxiliary connection and main fuse power connection tab in accordance with one embodiment of the present disclosure.
[0026] Figure 5 illustrates a first exemplary placement of a battery cell, a motor controller and a charger in accordance with one embodiment of the present disclosure.
[0027] Figure 6 illustrates a second exemplary placement of a battery cell, a motor controller and a charger in accordance with one embodiment of the present disclosure.
[0028] Figure 7 illustrates a third exemplary placement of a battery cell, a motor controller and a charger in accordance with one embodiment of the present disclosure.
[0029] Figure 8 illustrates a fourth exemplary placement of a battery cell and a motor controller in accordance with one embodiment of the present disclosure.

DETAILED DESCRIPTION
[0030] The following detailed description provides further details of the figures and example implementations of the present application. Reference numerals and descriptions of redundant elements between figures are omitted for clarity. Terms used throughout the description are provided as examples and are not intended to be limiting.
[0031] It is to be understood that the following disclosure describes several exemplary embodiments for implementing different features, structures, or functions of the invention. Exemplary embodiments of components, arrangements, and configurations are described below to simplify the present disclosure; however, these exemplary embodiments are provided merely as examples and are not intended to limit the scope of the invention.
[0032] Additionally, the present disclosure may repeat reference numerals and/or letters in the various exemplary embodiments and across the Figures provided herein. This repetition is for the purpose of simplicity and clarity and does not in itself dictate a relationship between the various exemplary embodiments and/or configurations discussed in the various Figures. Finally, the exemplary embodiments presented below may be combined in any combination, e.g., any element from one exemplary embodiment may be used in any other exemplary embodiment, without departing from the scope of the disclosure.
[00033] The long evolution that bike frames have undergone has resulted in relatively standard forms according to their use, which offer a satisfactory compromise between several criteria. Among these criteria, mention can be made in particular of the stiffness of the frame, its light weight, its practical character for the use in question and its geometric characteristics, which have a significant effect on the dynamic behavior of the bike. The recent appearance of two-wheelers with electric motors, whether simply to assist pedaling or as a principal means of propulsion, of course requires a battery to be carried, which is a particularly heavy element and has a degree of sensitivity to shocks. The integration of a battery in a frame having one of the configurations usual for bikes poses problems.
[0034] To limit the drawbacks of the conventional arrangements and assemblies used in the existing electric two wheeler vehicles, the present disclosure envisages improvement in the integration of a battery in an electric two-wheeler. In an embodiment, the present disclosure provides an improved frame and battery box accommodation in electric two-wheelers to improve the current state of electric motorcycle construction and make an efficient design
[00035] Electric two-wheeler is comparatively new segment and there are number of possibilities to arrange the overall architecture around the frame through having their own pros and cones. The present disclosure explores some of the possible solutions with individual pros and cones.
[00036] Further, the electric two-wheeler is moderately complex system when it comes to a specific energy which needs to be provided in which all of the auxiliary components like controller, charger and wiring harness for its optimum volume and working in optimum temperature range. The present disclosure some of the possible solutions considering their individual effects.
[0037] Accordingly, in an embodiment, a frame or chassis 5 is wrapped around battery box forming integral part of structure making battery box as stress member. Figure 1 illustrates a side view of a general placement of battery box and frame in accordance with one embodiment of the present disclosure. Figure 2 illustrates a front view of a general placement of battery box and frame in accordance with one embodiment of the present disclosure. Figure 3 illustrates a back view of a general placement of battery box and frame in accordance with one embodiment of the present disclosure.
[0038] In an exemplary embodiment, the frame 5 can be composed of a neck 9 to mount a front steering axle and a wheel assembly, a sub- frame 7, a main frame 5, a swing arm mounting placement 10, a rear suspension 6 mounting on the chassis and a pillion foot peg mount placement. It would be appreciated that the explanation of the components and/or there placement which are not required and/or otherwise diverts form the scope and crux of the present disclosure are not discussed in detailed manner. However, such details of know components can be inherited form any of the known or existing prior-art and not repeated here to avoid the complexity in understanding the invention.
[0039] In an embodiment, the battery box, which is an integration of an upper half 4, a middle half 3 and a lower half 2 connected together by one or more coupling arrangement is mounted in frame by means of three or multiple number of supporting, clamping, fastening, bolting, fixing arrangement 5a, 5b, and 5c.
[0040] In an exemplary embodiment, the battery box is preferably an ingress protection level 67 and/or above. The battery box can include a power connection tab 1, auxiliary connection 31 and main fuse 11 of same category. Figure 4 illustrates a battery box having an auxiliary connection and main fuse power connection tab in accordance with one embodiment of the present disclosure.
[0041] In an exemplary embodiment, the battery box, which is an integration of an upper half 4, a middle half 3 and a lower half 2 connected together together by means of multiple bolts and stud placement as shown in figure 2.
[0042] In an exemplary embodiment, the battery box, which is an integration of an upper half 4, a middle half 3 and a lower half 2 includes a distinctive multiple mounting placement 5a, 5b and 5c on either side for mounting on chassis shown in figure 2.
[0043] In an exemplary implementation, a power connection tab 1 and an auxiliary connection 31 can be mounted on upper half 4 as shown in figure 2 or on middle half 3 or lower half 2.
[0044] In an exemplary implementation, the main fuse 11 can be placed in lower half as shown in figure 2 or in middle half 3 or in lower half 2.
[0045] In an exemplary embodiment, the battery box, which is an integration of an upper half 4, a middle half 3 and a lower half 2 can be is composed of a battery cell which can be cylindrical, and/or prismatic, and/or pouch and/or the like, arranged in series parallel, a motor controller and a charger.
[0046] Figure 5 illustrates a first exemplary placement of a battery cell, a motor controller and a charger in accordance with one embodiment of the present disclosure. In an embodiment, overall placement of battery cell (say cylindrical, prismatic, pouch) arranged in series parallel, motor controller and charger arranged according to the present disclosure can have various technical advantages. Few of the advantages of such frame and battery box placement are as provided below:
i. The placement efficiently maintains centre of gravity of the vehicle.
ii. Using lower half 2 as heat sink of the controller can provide effective heat dissipation to surrounding.
iii. Using middle half 3 as heat sink of charger can provide effective heat dissipation to surrounding.
iv. Heating of cell at cold environment while charging as charger heat can be distributed to middle 3 and upper half 2.
v. The placement isolates battery cell from controller and charger in case of hazard.
vi. The placement provides easy assembly and maintenance of controller and charger as mounted in same compartment.
vii. The placement is of rigid type of accommodation and mounting with frame 5 of battery cell compartment securely and safely.
[0047] Figure 6 illustrates a second exemplary placement of a battery cell, a motor controller and a charger in accordance with one embodiment of the present disclosure. In an embodiment, overall placement of battery cell (Cylindrical, prismatic, pouch) arranged in series parallel, motor controller and Charger arranged according to the present disclosure can have various technical advantages. Few of the advantages of such frame and battery box placement are as provided below:
i. The placement efficiently maintains centre of gravity of the vehicle.
ii. Using middle half 3 as heat sink of the controller can provide effective heat dissipation to surrounding.
iii. Using lower half 2 as heat sink of charger can provide effective heat dissipation to surrounding.
iv. The placement efficiently maintains temperature in high ambient temperature zone while charging
v. The placement efficiently isolates battery cell from controller and charger in case of hazard
vi. The placement is an easy assembly and maintenance of controller and charger as mounted in same compartment.
vii. The placement is of rigid type and mounts with frame 5 of battery cell compartment securely and safely.
[0048] Figure 7 illustrates a third exemplary placement of a battery cell, a motor controller and a charger in accordance with one embodiment of the present disclosure. In an embodiment, overall placement of battery cell (Cylindrical, prismatic, pouch) arranged in series parallel, motor controller and Charger arranged according to the present disclosure can have various technical advantages. Few of the advantages of such frame and battery box placement are as provided below:
i. The placement efficiently maintains centre of gravity of the vehicle.
ii. The placement uses charging compartment 4 open to atmosphere for accommodating bigger capacity charger and implementing forced air cooling while charging.
iii. Using lower half 2 as heat sink for controller for effective heat dissipation to surrounding.
iv. The placement maintains temperature in high ambient temperature zone while charging.
v. The placement is an easy assembly and maintenance charger as mounted in different compartment and open to atmosphere.
viii. The placement is of rigid type and mounts with frame 5 of battery cell compartment securely and safely.
[0049] Figure 8 illustrates a fourth exemplary placement of a battery cell and a motor controller in accordance with one embodiment of the present disclosure. In an embodiment, overall placement of battery cell (Cylindrical, prismatic, pouch) arranged in series parallel and motor controller arranged according to the present disclosure can have various technical advantages. Few of the advantages of such frame and battery box placement are as provided below:
i. The placement can efficiently accommodating bigger capacity battery cell in volume.
ii. Using lower half 2 as heat sink of controller for effective heat dissipation to surrounding.
iii. The placement is of rigid type and mounts with frame 5 of battery cell compartment securely and safely.
iv. The placement efficiently maintains centre of gravity of the vehicle.
[0050] All directional and numeral references used herein are only used for identification purposes to aid the reader's understanding of the present invention, and do not create limitations, particularly as to the position, orientation, or use of the invention.
[0051] It will thus be seen that the objects set forth above, among those made apparent from the preceding description, are efficiently attained and, since certain changes may be made in the above article without departing from the spirit and scope of the invention, it is intended that all matter contained in the above description and shown in the accompanying drawings shall be interpreted as illustrative and not in a limiting sense.
[0052] It is also to be understood that the following claims are intended to cover all of the generic and specific features of the invention herein described and all statements of the scope of the invention which, as a matter of language, might be said to fall there between.
[0053] Moreover, other implementations of the present application will be apparent to those skilled in the art from consideration of the specification and practices of the example implementations disclosed herein. Various aspects and/or components of the described example implementations may be used singly or in any combination. It is intended that the specification and examples be considered as examples, with a true scope and spirit of the application being indicated by the following claims.
[0054] The foregoing has outlined features of several embodiments so that those skilled in the art may better understand the present disclosure. Those skilled in the art will also appreciate that the present disclosure may be used as a basis for designing or modifying other processes and structures for carrying out the same purposes and/or achieving the same advantages of the embodiments introduced herein. Those skilled in the art should also realize that such equivalent constructions do not depart from the scope of the present disclosure, and that they may make various changes, substitutions and alterations herein without departing from the scope of the present disclosure, as defined by the following claims.