Claims:
1. A system for uninterrupted power supply, the system comprising:
first and second batteries;
first and second relay circuits configured to communicate with the first and second batteries respectively;
an alternator configured to communicate with the first and second relay circuits;
a pre-charger relay circuit configured to communicate with the alternator and the first and second batteries;
an induction motor coupled with the alternator;
the first relay circuit configured to communicate with the first and second batteries;
the second relay circuit configured to communicate with the first relay circuit and the alternator; and
a battery management system configured to communicate with the induction motor, the first and second relay circuits, the first and second batteries, and the pre-charger relay circuit.

2. The system as claimed in claim 1, wherein the alternator has a gear ratio of 1:22.

3. The system as claimed in claim 1, wherein the battery management system is further configured to charge the first and second batteries simultaneously.

4. The system as claimed in claim 1, wherein the battery management system is further configured to:
detect whether the first battery is discharged, and
switch from the first battery to the second battery when the first battery is discharged and the second battery is charged, thereby providing uninterrupted power supply from the first and second batteries.

5. The system as claimed in claim 1, wherein the one of the second relay circuit is charged by the alternator.
, Description:FORM 2
THE PATENTS ACT, 1970
(39 of 1970)
&
THE PATENTS RULES, 2003
COMPLETE SPECIFICATION
[See section 10, Rule 13]

A SYSTEM FOR UNINTERRUPTED POWER SUPPLY

MAHINDRA & MAHINDRA LIMITED, HAVING ADDRESS: MAHINDRA RESEARCH VALLEY, MAHINDRA WORLD CITY, PLOT NO:41/1, ANJUR P.O. , CHENGALPATTU, DISTT. – KANCHEEPURAM, TAMILNADU – 603004, INDIA

THE FOLLOWING SPECIFICATION PARTICULARLY DESCRIBES THE INVENTION AND THE MANNER IN WHICH IT IS TO BE PERFORMED

TECHNICAL FIELD OF THE INVENTION
The present invention relates to system for continuous power supply.

BACKGROUND OF THE INVENTION
In electric vehicles, electricity is used by various sources such as lithium-ion batteries, electric motors, rechargeable battery packs and the like. In common practice, direct current electricity is fed into a DC/AC inverter where it is converted to alternating current electricity. This AC electricity is connected to a 3-phase AC motor.
Electric vehicles may include battery packs as a source of electricity. The battery packs have limited charge that results in the vehicle to run for limited time/miles. The current state of art includes single pack of batteries that undergo charging and discharging. In such vehicles, power supply gets interrupted till the user recharges the discharged battery. The interruption caused in power supply due to charging and discharging of the batteries lead to lose of load and motor efficiency. It reduces range, gear ratio of the vehicle. Further, currently used Lithium ion battery cells have critical design issue such as if they are overcharged it may get damaged and cause overheating and even explosion. If Lithium ion battery cells are discharged below a certain threshold, approximately 5 percent of total capacity; their capacity may reduced permanently.
Accordingly, there is need of the system to overcome losses occur due to interrupted power supply to the electric vehicles and provide overvoltage protection.

SUMMARY OF THE INVENTION
The present invention provides a system for uninterrupted power supply. The system includes a first battery and a second battery, a first and a second relay circuits configured to communicate with the first and second batteries respectively. An alternator is configured to communicate with the first and second relay circuits. A pre-charger relay circuit is configured to communicate with the alternator and the first and second batteries. An induction motor coupled with the alternator. The first relay circuit is configured to communicate with the first and second batteries. The second relay circuit is configured to communicate with the first relay circuit and the alternator. A battery management system is configured to communicate with the induction motor, the first and second relay circuits, the first and second batteries, and the pre-charger relay circuit. The battery management system is further configured to charge the first and second batteries simultaneously. The battery management system detects whether the first battery is discharged, and switches from the first battery to the second battery when the first battery is discharged and the second battery is charged, thereby providing uninterrupted power supply from the first and second batteries. The one of the second relay circuit is charged by the alternator. The alternator has a gear ratio of 1:22.

BRIEF DESCRIPTION OF THE DRAWINGS
FIG. 1 shows a system for uninterrupted power supply;
FIG. 2 shows configuration of a motor with an alternator in accordance with an embodiment of the present invention; and
FIG. 3 shows display screen n accordance with the system of present invention.

DETAILED DESCRIPTION OF THE INVENTION
Although specific terms are used in the following description for sake of clarity, these terms are intended to refer only to particular structure of the invention selected for illustration in the drawings, and are not intended to define or limit the scope of the invention.
In general aspect, the present invention provides system for uninterrupted power supply with reduced friction losses and vibrations of a body which is receiving power using an arrangement of an alternator with motor with double battery pack.
The present invention is illustrated with reference to the accompanying drawings, throughout which reference numbers indicate corresponding parts in the various figures.
Referring to FIG. 1, a system for uninterrupted power supply 100 for an electric vehicle in accordance with an embodiment of the present invention is shown. The system 100 includes an induction motor 110 integrated with an alternator 120. The alternator 120 is configured to communicate with two relay circuits 130A, 130B and a pre-charger relay circuit 135. A first relay circuit 130A is connected to batteries 140, 150. A second relay circuit 130B is connected with the first relay circuit 130A, a charger 160 and the alternator 120. A batter management system 170 is configured to communicate with the induction motor 110, the relay circuits 130A, 130B, the batteries 140, 150 and the pre-charger relay 135. The pre-charger relay circuit 135 configured to communicate with the alternator 120 and the first and second batteries 140, 150.
A battery-management system (BMS) 170 consists of cutoff field-effect transmitters (FETs), a fuel-gauge monitor, a cell-voltage monitor, a cell-voltage balance, a real-time clock, a plurality of temperature monitors, and a state machine. The components are connected in a circuit board. The battery management system 170 is to protect the cell. To ensure a battery's charge doesn't go above or below its limits, a battery management system 170 has a safeguard device called a Lithium-ion protector.
The battery protection circuit has two electronic switches called metal–oxide–semiconductor field-effect transistor i.e MOSFETs. MOSFETs are semiconductors used to switch electronic signals on or off in a circuit. The battery management system 170 has a discharge MOSFET and a charge MOSFET. A protector detects the voltage across the cells exceeds a certain limit, and discontinues the charge by opening the charge MOSFET chip. Once the charge goes back down to a safe level then the switch again closes. Similarly, when a cell drains to a certain voltage; the protector cuts off the discharge by opening the discharge MOSFET. The second most important function performed by a battery management system is energy management. Based on the different pre-existing conditions; the battery management system 170 switches from one battery pack to the other.
In accordance with this one embodiment, the DC alternator 120 having gear ratio 1:22 is integrated with the AC induction motor 110 as shown in FIG. 2. The alternator 120 integrated with the induction motor 110 is connected to the battery management system 170. The battery management system 170 facilitates charging and discharging of the first battery 140 and a second battery 150. The battery management system 170 charges the first discharged battery 140 while second battery 150 is getting utilized/ discharged. It provides additional mileage to the vehicle to run. The battery management system 170 is charged by using the pre-charger relay 135. The battery management system 170 is configured to communicate with a LCD panel 180. The LCD panel 180 displays charge status of both the batteries 140, 150 as shown in FIG. 3.
The system 100 of the present invention facilitates reduction in friction loss during power transfer due to involvement of less number of elements, reduction in vibration, reduction in weight of the vehicle and the like. Further, the system 100 eliminates the use of chine drive that results in increase of efficiency without affecting the average speed of the vehicle. The system 100 eliminates reduction in gear ratio or requirement of additional power. The battery management system 170 is configured to generate power using one battery 140 and simultaneously charge another battery 150. The battery management system 170 switches from discharged battery to the charged battery pack for uninterrupted power supply to the vehicle. The battery management system 170 is configured to manage the battery pack status of charge/discharge, SOC, range of vehicle and DTE.
The embodiments of the invention shown and discussed herein are merely illustrative of modes of application of the present invention. Reference to details in this discussion is not intended to limit the scope of the claims to these details, or to the figures used to illustrate the invention.
It is understood that various omission and substitutions of equivalents are contemplated as circumstance may suggest or render expedient, but such are intended to cover the application or implementation without departing from the scope of the present invention.