DESC:AUXILIARY POWER SUPPLY FOR ELECTRIC VEHICLE
CROSS-REFERENCE TO RELATED APPLICATIONS
The present application claims priority from Indian Provisional Patent Application No. 202321090112 filed on 30/12/2023, the entirety of which is incorporated herein by a reference.
TECHNICAL FIELD
Generally, the present disclosure relates to an electric vehicle. Particularly, the present disclosure relates to an auxiliary power supply of an electric vehicle.
BACKGROUND
The usage of electric vehicles (EVs) has rapidly increased in the recent years due to growing environmental awareness and advancements in technology. The EVs are offering a cleaner alternative to traditional internal combustion engine vehicles which significantly reduces the greenhouse gas emissions and dependence on fossil fuels. Furthermore, the electric vehicles are providing lower operating costs. As a result, there has been recent push to develop hybrid and fully electric vehicles.
Generally, in the electric vehicle, a battery packs are essential for storing and supplying electrical energy to power a motor which enables zero-emission transportation. The battery pack determines the vehicle's range, performance, and efficiency as the battery pack is the source of power for the powertrain. Additionally, the battery pack also power up the auxiliary systems such peripherals of the vehicle. Furthermore, as per requirements of the multiple auxiliary components, a DC-DC converter is an essential component to step down higher-voltage battery power to a relatively lower-voltage. The DC-DC converters may include analog converters having dedicated control ICs or microcontroller based digital DC-DC converters. The analog DC-DC converters are robust, however, lack capability of real-time adjustments or fault detection. The microcontroller based digital DC-DC- converters may overcome such issues. However, such converters may lack robustness. Furthermore, such converters are costlier to implement and increases the complexity of the overall system.
Therefore, there exists a need for an improved converter that overcomes one or more problems associated as set forth above.
SUMMARY
An object of the present disclosure is to provide an auxiliary power supply of electric vehicle.
In accordance with an aspect of the present disclosure, there is provided an auxiliary power supply of an electric vehicle. The auxiliary power supply comprises a DC-DC conversion module, configured to step down a voltage received from a power pack of the vehicle, a supply module configured to supply power at least one peripheral in the electric vehicle and a fault detection module configured to detect at least one fault and cut-off power supplied to the at least one peripheral in the electric vehicle.
The present disclosure discloses an auxiliary power supply of an electric vehicle. The auxiliary power supply of an electric vehicle as disclosed by present disclosure is advantageous in terms of enhanced safety and reduced losses. Furthermore, the auxiliary power supply beneficially provides efficient power management with effective fault detection and robustness. Moreover, the auxiliary power supply converts the high voltage from the vehicle’s power pack, to power-up the low-voltage components of the electric vehicle. Beneficially, the auxiliary power supply allows for an immediate power cut-off to at least one peripheral in the electric vehicle upon fault detection which provides the rapid protection and minimizes the risk of component failure. Beneficially, the auxiliary power supply of the present disclosure provides robust operation, thereby reducing the maintenance costs and downtime for users.
Additional aspects, advantages, features and objects of the present disclosure would be made apparent from the drawings and the detailed description of the illustrative embodiments constructed in conjunction with the appended claims that follow.
It will be appreciated that features of the present disclosure are susceptible to being combined in various combinations without departing from the scope of the present disclosure as defined by the appended claims.
BRIEF DESCRIPTION OF DRAWINGS
The summary above, as well as the following detailed description of illustrative embodiments, is better understood when read in conjunction with the appended drawings. For the purpose of illustrating the present disclosure, exemplary constructions of the disclosure are shown in the drawings. However, the present disclosure is not limited to specific methods and instrumentalities disclosed herein. Moreover, those in the art will understand that the drawings are not to scale. Wherever possible, like elements have been indicated by identical numbers.
Embodiments of the present disclosure will now be described, by way of example only, with reference to the following diagrams wherein:
Figure 1 illustrates a block diagram for an auxiliary power supply of an electric vehicle, in accordance with an embodiment of the present disclosure.
In the accompanying drawings, an underlined number is employed to represent an item over which the underlined number is positioned or an item to which the underlined number is adjacent. A non-underlined number relates to an item identified by a line linking the non-underlined number to the item. When a number is non-underlined and accompanied by an associated arrow, the non-underlined number is used to identify a general item at which the arrow is pointing.

DETAILED DESCRIPTION
The following detailed description illustrates embodiments of the present disclosure and ways in which they can be implemented. Although some modes of carrying out the present disclosure have been disclosed, those skilled in the art would recognize that other embodiments for carrying out or practicing the present disclosure are also possible.
The description set forth below in connection with the appended drawings is intended as a description of certain embodiments of an auxiliary power supply and is not intended to represent the only forms that may be developed or utilized. The description sets forth the various structures and/or functions in connection with the illustrated embodiments; however, it is to be understood that the disclosed embodiments are merely exemplary of the disclosure that may be embodied in various and alternative forms. The figures are not necessarily to scale; some features may be exaggerated or minimized to show details of particular components. Therefore, specific structural and functional details disclosed herein are not to be interpreted as limiting, but merely as a representative basis for teaching one skilled in the art to variously employ the present invention.
While the disclosure is susceptible to various modifications and alternative forms, specific embodiment thereof has been shown by way of example in the drawings and will be described in detail below. It should be understood, however, that it is not intended to limit the disclosure to the particular forms disclosed, but on the contrary, the disclosure is to cover all modifications, equivalents, and alternatives falling within the scope of the disclosure.
The terms “comprise”, “comprises”, “comprising”, “include(s)”, or any other variations thereof, are intended to cover a non-exclusive inclusion, such that a setup, or system that comprises a list of components or steps does not include only those components or steps but may include other components or steps not expressly listed or inherent to such setup or system. In other words, one or more elements in a system or apparatus preceded by “comprises... a” does not, without more constraints, preclude the existence of other elements or additional elements in the system or apparatus.
In the following detailed description of the embodiments of the disclosure, reference is made to the accompanying drawings which are shown by way of illustration-specific embodiments in which the disclosure may be practiced. These embodiments are described in sufficient detail to enable those skilled in the art to practice the disclosure, and it is to be understood that other embodiments may be utilized and that changes may be made without departing from the scope of the present disclosure. The following description is, therefore, not to be taken in a limiting sense.
The present disclosure will be described herein below with reference to the accompanying drawings. In the following description, well-known functions or constructions are not described in detail since they would obscure the description with unnecessary detail.
As used herein, the terms “electric vehicle”, “EV”, and “EVs” are used interchangeably and refer to any vehicle having stored electrical energy to drive the vehicle, including the vehicle capable of being charged from an external electrical power source. This may include vehicles having batteries which are exclusively charged from an external power source, as well as hybrid-vehicles which may include batteries capable of being at least partially recharged via an external power source. Additionally, it is to be understood that the ‘electric vehicle’ as used herein includes electric two-wheeler, electric three-wheeler, electric four-wheeler, electric pickup trucks, electric trucks and so forth.
As used herein, the terms “power pack” “battery pack”, “battery”, and “power source” are used interchangeably and refer to multiple individual battery cells connected to provide a higher combined voltage or capacity than what a single battery can offer. The battery pack is designed to store electrical energy and supply it as needed to various devices or systems. Battery pack, as referred herein may be used for various purposes such as power electric vehicles and other energy storage applications. Furthermore, the battery pack may include additional circuitry, such as a battery management system (BMS), to ensure the safe and efficient charging and discharging of the battery cells. The battery pack comprises a plurality of cell arrays which in turn comprises a plurality of battery cells.
As used herein, the term “auxiliary power supply” refers to an electronic device that is responsible for converting the higher-voltage DC (direct current) power from the electric vehicle's battery pack into a relatively lower-voltage DC power that is suitable for powering various auxiliary systems and components within the electric vehicle. For example, the high voltage power may be in a range of 48V–500V depending on the voltage architecture of the powertrain and powerpack of the electric vehicle. Similarly, the low voltage power may be in a range of 5V–12V depending on the requirements of the electronic components of the electric vehicle. Furthermore, the auxiliary systems may include the vehicle's lighting, infotainment system, device charging outlets, and so forth.
As used herein, the term “supply module” refers to a critical subsystem responsible for delivering regulated power to various peripheral components and other subsystems within the vehicle. The supply module receives conditioned, stepped-down voltage from the DC-DC conversion module and distributes the power to low-voltage peripherals such as the vehicle’s lighting, infotainment system, sensors, control units, and other auxiliary loads that require stable power to operate effectively.
As used in, the term “at least one peripheral” refers to a various low-voltage components and auxiliary systems within the vehicle that rely on a stable, stepped-down power supply separate from the main high-voltage propulsion system. The at least one peripheral encompass a wide range of vehicle subsystems essential for functionality, comfort, and safety which includes lighting systems such as headlights, taillights, and interior lights etc, the infotainment systems such as displays, audio systems, navigation systems, electronic control units (ECUs) for subsystems, and various sensors and actuators that may assist in vehicle diagnostics and performance monitoring.
As used herein, the terms “battery management system” and “BMS” are used interchangeably and refer to a system of the electric vehicle that monitors, controls, and optimizes the performance and safety of the power pack. The battery management system performs crucial functions including state of charge estimation and monitoring, state of health monitoring, thermal management, cell balancing, over-voltage and under-voltage protection, safety management, communication and data reporting, and efficiency optimization. The battery management system comprises a microcontroller to perform the processing tasks. The battery management system also controls the power supply to the various electrical systems in the electric vehicle.
As used herein, the terms “DC-DC conversion module” refers to an electronic component responsible for stepping down high-voltage DC input from an electric vehicle’s main power pack to a lower and stable voltage. The DC-DC conversion module operates by converting the high-voltage input to the required lower voltage through efficient switching techniques, often involving switching devices like MOSFETs and IGBTs, which are controlled to maintain precise output voltage levels. The DC-DC conversion module typically includes essential sub-components such as transformers for galvanic isolation, which ensures user safety and protecting sensitive electronics from high-voltage faults.
As used herein, the term “fault detection module” refers to an electronic unit designed to monitor and safeguard the system by identifying abnormal conditions that may compromise safety, performance, or reliability. The fault detection module continuously checks for various fault conditions, such as short circuits, over-voltage, over-current, and over-temperature, which may arise due to unexpected electrical or thermal stresses. When a fault is detected, the fault detection module initiates a protective response, often by cutting off power to the affected peripherals to prevent damage and maintain overall system integrity.
As used herein, the terms “at least one fault” and “faults” are used interchangeably and refer to abnormal conditions or malfunctions that may occur within the DC-DC converter, leading to a disruption in its normal operation and potentially affecting the performance and safety of the DC-DC converter and the overall electrical systems of the electric vehicle. The at least one fault comprises a short circuit fault, an over voltage fault, an over current fault, and an over temperature fault. When a short circuit fault occurs, the fault detection module identifies an unintended high current path and prevents potential damage to both the DC-DC conversion module and connected peripherals. For an over-voltage fault, the fault detection module detects when the voltage level exceeds a safe threshold and protecting sensitive components from excessive voltage. In the case of an over-current fault, the fault detection module recognizes current levels surpassing the designed limit, safeguarding the circuitry from potential overheating or degradation. Moreover, the over-temperature fault detection monitors the temperature within the auxiliary power supply and identifies any instance where the temperature exceeds safe operating conditions, thereby preventing thermal stress and component failure.
As used herein, the term “communicably coupled” refers to a communicational connection between the various components of the system. The communicational connection between the various components of the system enables the exchange of data between two or more components of the system.
As used herein, the term “conversion control unit” refers to a component within the DC-DC conversion module responsible for managing the operational parameters of the voltage conversion process. The conversion control unit controls the operation of a switching devices in the DC-DC converter and adjusts the timing, frequency, and duty cycle to maintain a stable and efficient output voltage despite fluctuations in the input supply or load demands. The conversion control module is a designated integrated circuit in auxiliary power supply.
As used herein, the term “at least one switching device” refers to the electronic component(s) responsible for controlling the flow of electrical energy within the DC-DC conversion module. The at least one switching devices, such as transistors which includes MOSFETs or IGBT regulating and converting high-voltage input from the vehicle’s main power pack to a lower, stable output voltage suitable for auxiliary systems. By rapidly switching on and off at high frequencies, the switching devices control the power transfer through the converter’s primary and secondary sides and allowing precise voltage regulation, efficient energy use, and minimized energy losses.
As used herein, the term “transformer” is a critical component that provides electrical isolation and voltage conversion between the high-voltage power source and low-voltage peripherals. By transferring energy via magnetic induction, the transformer isolates the primary side (high-voltage side) from the secondary side (low-voltage side), preventing direct electrical connection and enhancing user safety. The transformer steps down the input voltage to a suitable level for auxiliary systems, such as lighting, infotainment, and control modules, ensuring the peripherals receive a stable, low-voltage supply.
As used herein, the term “galvanic isolation” refers to the separation of electrical circuits to prevent direct current flow between the high-voltage power source (such as the main battery pack) and low-voltage components or peripherals. The galvanic isolation is achieved using the transformer within the DC-DC converter module. The purpose of galvanic isolation is to safeguard low-voltage circuits from potentially harmful high-voltage levels, ensuring no unintended current flows between the primary and secondary sides.
As used herein, the term “forward converter” refers to a type of DC-DC converter used to efficiently step down high-voltage input from the vehicle’s main power pack to a lower voltage suitable for auxiliary systems and peripherals. The forward converter transfers energy directly through a transformer during the “on” phase of the switching cycle, allowing continuous power delivery when the switch is engaged. The transformer provides galvanic isolation, which separates high-voltage circuits from low-voltage outputs, enhancing safety for sensitive electronics.
As used herein, the term “primary side of the DC-DC conversion module” refers to the input section of the converter directly connected to the high-voltage power source, typically the main power pack of the electric vehicle. The primary side of the converter is responsible for receiving and initially processing the high-voltage input, which is then converted to a lower, stable output suitable for low-voltage peripherals.
As used herein, the term “secondary side of the DC-DC conversion module” refers to the output section of the converter where the stepped-down, isolated DC voltage is supplied to various low-voltage peripherals or circuits within the vehicle. The secondary side is electrically isolated from the high-voltage input, or primary side, through a transformer or similar isolation mechanism which ensures that the output voltage is safe and suitable for sensitive components.
Figure 1, in accordance with an embodiment describes an auxiliary power supply 100 of an electric vehicle. The auxiliary power supply 100 comprises a DC-DC conversion module 102, configured to step down a voltage received from a power pack 104 of the vehicle, a supply module 106 configured to supply power at least one peripheral 108 in the electric vehicle and a fault detection module 110 configured to detect at least one fault and cut-off power supplied to the at least one peripheral 108 in the electric vehicle.
The present disclosure discloses the auxiliary power supply 100 of the electric vehicle. The auxiliary power supply 100 as disclosed by present disclosure is advantageous in terms of in terms of efficient power management with robust fault tolerance. Furthermore, the DC-DC conversion module 102 as disclosed by present disclosure is advantageously engineered to step down the high voltage received from the vehicle's power pack 104. Beneficially, the DC-DC conversion module 102 provides a stable, lower voltage supply suitable for at least one peripheral 108. The DC-DC conversion module 102 as disclosed by present disclosure is advantageously capable of identifying multiple faults occurring simultaneously in the auxiliary power supply 100. Beneficially, the efficient voltage step-down for the at least one peripheral 108 significantly reduces the load on the main power pack, thereby optimizes the vehicle energy distribution and extended overall battery life. Beneficially, the DC-DC conversion module 102 reduces energy waste and improves vehicle efficiency by supplying only the necessary low-voltage power to the at least one peripheral 108. Beneficially, the DC-DC conversion module 102 is a robust and reliable power conversion system which significantly reduces the losses and improves the longevity of the auxiliary power supply 100. Furthermore, the supply module 106 as disclosed by present disclosure advantageously offers the reliable power delivery to the at least one peripheral 108, thereby ensures the seamless and consistent operation. Furthermore, the fault detection module 110 as disclosed by present disclosure beneficially introduces a vital layer of protection by monitoring for potential issues like over-voltage, short circuits, over-current, and over-temperature conditions. The fault detection module 110 beneficially cuts off the power to the affected peripheral 108 upon detecting at least one fault. Beneficially, the ability to resume normal operation after the fault is cleared ensures the continuous vehicle operation and minimizes user inconvenience, thereby significantly provides fault tolerance and operational resilience. Beneficially, by isolating the at least one fault and protecting the at least one peripheral 108, the auxiliary power supply 100 provides robust technique, thereby reduces the maintenance costs and downtime for users.
In an embodiment, the DC-DC conversion module 102 comprises a conversion control unit 112 configured to control operation of at least one switching device 114 of the DC-DC conversion module 102. Beneficially, the conversion control unit 112 continuously monitors and adjusts the switching frequency and duty cycle of the at least one switching device 114 based on load demands and input conditions. Furthermore, by actively controlling the at least one switching device 114, the conversion control unit 112 ensures that the DC-DC conversion module 102 operates at optimal efficiency, thereby minimizes the energy loss and maintaining stable output voltage levels.
In an embodiment, the DC-DC conversion module 102 comprises a transformer 116 configured to provide galvanic isolation. The transformer 116 serves as a key component in isolating a primary side of the DC-DC conversion module 102 from the secondary side the DC-DC conversion module 102 which significantly ensures that there is no direct electrical connection between the primary side and secondary side of the DC-DC conversion module 102. Beneficially, the galvanic isolation safeguards the at least one peripheral 108 from high-voltage faults originating from the primary side of the DC-DC conversion module 102. Additionally, by incorporating galvanic isolation, the transformer 116 enhances user safety and prevents electrical interference, thereby contributing to the reliability of the auxiliary power supply 100 within the vehicle.
In an embodiment, the DC-DC conversion module 102 is a forward converter. The forward converter is designed to efficiently step down the high voltage received from the vehicle’s power pack 104 to a lower, stable voltage suitable for powering the at least one peripheral 108 within the vehicle. Beneficially, the forward converter topology enables continuous power transfer during operation which significantly enhances energy efficiency and ensuring reliable performance under varying load conditions. Additionally, the forward converter incorporates isolation through the transformer 116 which provides galvanic separation between the high-voltage input and the low-voltage output.
In another embodiment, the DC-DC conversion module 102 may be a buck converter. Furthermore, yet another embodiment, the DC-DC conversion module 102 may be a buck-boost converter. Furthermore, yet another embodiment, the DC-DC conversion module 102 may be a flyback converter. Furthermore, yet another embodiment, the DC-DC conversion module 102 may be a half-bridge converter. Furthermore, yet another embodiment, the DC-DC conversion module 102 may be a full-bridge converter. Furthermore, yet another embodiment, the DC-DC conversion module 102 may be a cuk converter. Furthermore, yet another embodiment, the DC-DC conversion module 102 may be a zeta converter. Beneficially, as per the requirement of the auxiliary power supply 100, the any of the converter as set forth above may be used suitably.
In an embodiment, the at least one fault comprises a short circuit fault, an over voltage fault, an over current fault, and an over temperature fault. Beneficially, upon detecting any of the at least one fault, the fault detection module 110 may automatically initiate a power cut-off to the affected peripheral and isolates the affected peripherals from the auxiliary power supply 100 to prevent further damage. Beneficially, the fault detection module 110 enhances the durability and reliability of the vehicle auxiliary power supply 100.
In an embodiment, the fault detection module 110 is configured to detect the at least one fault on the primary side of the DC-DC conversion module 102 and the secondary side of the DC-DC conversion module 102. The primary side is connected to the power pack 104 which supplies the power to the DC-DC conversion module 102. Beneficially, the fault detection module 110 monitors the primary side of the DC-DC conversion module 102 and the secondary side of the DC-DC conversion module 102 for the detection of at least one fault such as over-voltage or short circuits that may impact the power pack 104 or the DC-DC conversion module 102. Beneficially, by supervising both the primary side of the DC-DC conversion module 102 and the secondary side of the DC-DC conversion module 102, the auxiliary power supply 100 significantly provides comprehensive protection across the entire DC-DC conversion process.
In an embodiment, the fault detection module 110 is configured to instruct the supply module 106 to cut-off power supplied to the at least one peripheral 108 upon the detection of the at least one fault. The fault detection module 110 detecting the at least one fault such as the over-voltage, the over-current, the short circuit, or the over-temperature event and communicates directly with the supply module 106. Beneficially, the supply module 106 promptly disconnects or cuts off power supplied to at least one peripheral 108 in the electric vehicle. Beneficially, the fault detection module 110 helps to prevent damage to both the auxiliary power supply 100 and connected the at least one peripheral 108 by ensuring that faulty conditions may not impact the operation of other subsystems in vehicle.
In an embodiment, the fault detection module 110 is communicably coupled to a battery management system 118 and configured to communicate the detected at least one fault to the battery management system 118. The fault detection module 110 is configured to monitor for various fault conditions, such as over-voltage, short circuit, over-current, and over-temperature faults, and identify at least one fault. Upon detecting the at least one fault, the fault detection module 110 transmits information about the at least one fault directly to the battery management system 118. Beneficially, direct communication between the fault detection module 110 and the battery management system 118 allows quick responses to detected faults by adjusting power, starting safety measures, or sending real-time alerts to the vehicle's main control unit or display. Beneficially, by integrating fault detection module 110 with the battery management system 118, the auxiliary power supply 100 enhances the vehicle's safety and operational stability, thereby providing an advanced fault response mechanism.
In an embodiment, the DC-DC conversion module 102 stops receiving power from the power pack 104 of the vehicle, upon detection of the at least one fault. Beneficially, the immediate disconnection of DC-DC conversion module 102 and the power pack 104 prevents any further strain on the power pack 104 which further protects the auxiliary power supply 100 from potential damage. Furthermore, the safety feature beneficially enhances the vehicle safety by preventing faults from escalating and minimizes the risk of damage to critical components.
In an embodiment, the DC-DC conversion module 102, the supply module 106 and the fault detection module 110 resume functioning, when the detected fault is cleared. Beneficially, the ability to resume normal operation after the fault is cleared which ensures continuous vehicle operation and minimizes user inconvenience, thereby significantly provides both fault tolerance and operational resilience.
In an embodiment, the auxiliary power supply 100 of the electric vehicle. The auxiliary power supply 100 comprises the DC-DC conversion module 102, configured to step down a voltage received from a power pack 104 of the vehicle, the supply module 106 configured to supply power the at least one peripheral 108 in the electric vehicle and the fault detection module 110 configured to detect the at least one fault and cut-off power supplied to the at least one peripheral 108 in the electric vehicle. Furthermore, the DC-DC conversion module 102 comprises the conversion control unit 112 configured to control operation of the at least one switching device 114 of the DC-DC conversion module 102. Furthermore, the DC-DC conversion module 102 comprises the transformer 116 configured to provide galvanic isolation. Furthermore, the DC-DC conversion module 102 is the forward converter. Furthermore, the at least one fault comprises the short circuit fault, the over voltage fault, the over current fault, and the over temperature fault. Furthermore, the fault detection module 110 is configured to detect the at least one fault on the primary side of the DC-DC conversion module 102 and the secondary side of the DC-DC conversion module 102. Furthermore, the fault detection module 110 is configured to instruct the supply module 106 to cut-off power supplied to the at least one peripheral 108 upon the detection of the at least one fault. Furthermore, the fault detection module 110 is communicably coupled to the battery management system 118 and configured to communicate the detected at least one fault to the battery management system 118. Furthermore, the DC-DC conversion module 102 stops receiving power from the power pack 104 of the vehicle, upon detection of the at least one fault. Furthermore, the DC-DC conversion module 102, the supply module 106 and the fault detection module 110 resume functioning when the detected fault is cleared.
In the description of the present invention, it is also to be noted that, unless otherwise explicitly specified or limited, the terms “disposed,” “mounted,” and “connected” are to be construed broadly, and may for example be fixedly connected, detachably connected, or integrally connected, either mechanically or electrically. They may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art.
Modifications to embodiments and combination of different embodiments of the present disclosure described in the foregoing are possible without departing from the scope of the present disclosure as defined by the accompanying claims. Expressions such as “including”, “comprising”, “incorporating”, “have”, “is” used to describe and claim the present disclosure are intended to be construed in a non- exclusive manner, namely allowing for items, components or elements not explicitly described also to be present. Reference to the singular is also to be construed to relate to the plural where appropriate.
Although embodiments have been described with reference to a number of illustrative embodiments thereof, it should be understood that numerous other modifications and embodiments can be devised by those skilled in the art that will fall within the spirit and scope of the principles of this disclosure. More particularly, various variations and modifications are possible in the component parts and/or arrangements of the subject combination arrangement within the scope of the present disclosure, the drawings and the appended claims. In addition to variations and modifications in the component parts and/or arrangements, alternative uses will also be apparent to those skilled in the art.
,CLAIMS:We Claim:
1. An auxiliary power supply (100) of an electric vehicle, wherein the auxiliary power supply (100) comprises:
- a DC-DC conversion module (102), configured to step down a voltage received from a power pack (104) of the vehicle;
- a supply module (106) configured to supply power at least one peripheral (108) in the electric vehicle; and
- a fault detection module (110) configured to detect at least one fault and cut-off power supplied to the at least one peripheral (108) in the electric vehicle.
2. The auxiliary power supply (100) as claimed in claim 1, wherein the DC-DC conversion module (102) comprises a conversion control unit (112) configured to control operation of at least one switching device (114) of the DC-DC conversion module (102).
3. The auxiliary power supply (100) as claimed in claim 1, wherein the DC-DC conversion module (102) comprises a transformer (116) configured to provide galvanic isolation.
4. The auxiliary power supply (100) as claimed in claim 1, wherein the DC-DC conversion module (102) is a forward converter.
5. The auxiliary power supply (100) as claimed in claim 1, wherein the at least one fault comprises a short circuit fault, an over voltage fault, an over current fault, and an over temperature fault.
6. The auxiliary power supply (100) as claimed in claim 1, wherein the fault detection module (110) is configured to detect the at least one fault on a primary side of the DC-DC conversion module (102) and a secondary side of the DC-DC conversion module (102).
7. The auxiliary power supply (100) as claimed in claim 1, wherein the fault detection module (110) is configured to instruct the supply module (106) to cut-off power supplied to the at least one peripheral (108) upon the detection of the at least one fault.
8. The auxiliary power supply (100) as claimed in claim 1, wherein the fault detection module (110) is communicably coupled to a battery management system (118) and configured to communicate the detected at least one fault to the battery management system (118).
9. The auxiliary power supply (100) as claimed in claim 1, wherein the DC-DC conversion module (102) stops receiving power from the power pack (104) of the vehicle, upon detection of the at least one fault.
10. The auxiliary power supply (100) as claimed in claim 1, wherein the DC-DC conversion module (102), the supply module (106) and the fault detection module (110) resume functioning, when the detected fault is cleared.