New energy vehicle power supply system and new energy vehicles

Abstract

The present application provides a new energy vehicle power supply system and a new energy vehicle, wherein the system includes: at least one load and a power supply management device, the power supply management device manages the power supply of the load, and the power supply management device includes a high-precision reference source, an inverting amplifier, a transistor, an overvoltage protection module, an overcurrent protection module, and a microcontroller; wherein the high-precision reference source is respectively connected to the inverting amplifier and the transistor, the inverting amplifier is connected to the load, the transistor is connected to the load, the overvoltage protection module is connected to the load, and the overcurrent protection module is connected to the load; and the microcontroller is respectively connected to the overvoltage protection module, the inverting amplifier, and the transistor. The system can meet the power needs of multiple loads, reduce the use of linear power supplies and the wiring layout of the power supply system, and at the same time, the power supply system also has a self-diagnosis protection function, and the power supply to the load can be controlled and adjusted, meeting the requirements for high load voltage and current accuracy.

Description

Technical Field

[0001] The present invention relates to the technical field of new energy vehicle power supply technology, and in particular to a new energy vehicle power supply system and a new energy vehicle. Background Art

[0002] As an emerging technology to address the energy crisis and alleviate environmental pollution, new energy has gradually made inroads into various technological sectors, particularly the automotive industry, where a wide range of new energy vehicles are emerging and constantly being upgraded. In new energy vehicles, the battery management system, as a core component, manages battery charging and discharging, monitors battery status, and performs fault diagnosis and execution. However, in practical applications, battery management systems require multiple power supply lines due to the complexities of analog and digital data acquisition, total voltage detection, insulation testing, and driver chips. Managing these multiple power lines has become a pressing technical challenge.

[0003] Chinese patent CN108400623B discloses a terminal and a method for implementing multi-path power supply management thereof, wherein the battery module supplies power to each functional module through multiple independent power supply paths, and then the power control module issues power supply control instructions to each power supply management module based on the power supply requirements of each functional module. Finally, the power supply management module controls the power supply of the power supply paths managed by each module according to the power supply control instructions. By independently controlling each power supply path, the functional modules of the terminal can be better managed and controlled. However, this method cannot achieve adjustable and controllable voltage and current requirements of each functional module according to the power demand of each functional module, and cannot meet the high voltage and current accuracy requirements of the functional modules. At the same time, it does not have the self-protection and diagnosis functions for overvoltage and overcurrent conditions that occur in the functional modules, affecting the operation of each functional module. Summary of the Invention

[0004] In order to provide a basic understanding of some aspects of the disclosed embodiments, a brief summary is given below. The summary is not an extensive review, nor is it intended to identify key / critical elements or delineate the scope of protection of these embodiments, but rather serves as a prelude to the detailed description that follows.

[0005] In view of the shortcomings of the existing technology mentioned above, the present invention discloses a new energy vehicle power supply system and a new energy vehicle, which are used to solve the technical problems in the related technology that multi-path power supply cannot meet the high-precision power requirements of each functional module and each power supply path does not have self-protection and diagnosis functions, thereby affecting the operation of the functional modules.

[0006] In the first aspect, the present application provides a new energy vehicle power supply system, the system includes at least one load and a power supply management device, the power supply management device manages the power supply of the load, and the power supply management device includes a high-precision reference source, an inverting amplifier, a transistor, an overvoltage protection module, an overcurrent protection module and a microcontroller; the high-precision reference source is connected to the inverting amplifier and the transistor, respectively, for transmitting the reference output voltage to the inverting amplifier, and transmitting the reference output current to the transistor; the inverting amplifier is connected to the load, for performing a voltage regulation on the received reference output voltage, and outputting an operational discharge voltage and transmits it to the load; the transistor is connected to the load, and is used to perform a primary current regulation on the received reference output current, and output the operational amplifier current to the load; the overvoltage protection module is connected to the load, and is used to perform overvoltage protection if it is determined that the operational amplifier voltage is overvoltage; the overcurrent protection module is connected to the load, and is used to perform overcurrent protection if it is determined that the operational amplifier current of the load is overcurrent; the microcontroller is respectively connected to the overvoltage protection module, the inverting amplifier and the transistor, and is used to perform a secondary voltage regulation on the operational amplifier voltage and a secondary current regulation on the operational amplifier current when the operational amplifier voltage is overvoltage.

[0007] In one embodiment of the present invention, the overvoltage protection module includes a voltage detector, a first reference source, a first comparator, and a first switching transistor; the voltage detector is connected to the load and the first comparator, respectively, for obtaining the op amp voltage and transmitting it to the first comparator; the first reference source is connected to the first comparator, for providing the first comparator with a standard voltage for the operation of the load; the first comparator is connected to the microcontroller, for comparing the op amp voltage with the standard voltage, and if it is determined that the op amp voltage is overvoltage, sending overvoltage feedback to the microcontroller; the first switching transistor is connected to the first comparator and the load, and is used to keep the working state in the closed state when the op amp voltage is normal so that the load can operate normally, and to keep the working state in the disconnected state when the op amp voltage is overvoltage so as to perform the overvoltage protection on the load.

[0008] In one embodiment of the present invention, the overvoltage protection module further includes a second switching transistor and a first light-emitting diode; the second switching transistor is connected to the first comparator, and is used to receive the first comparison result of the first comparator and control the display state of the first light-emitting diode; the first light-emitting diode is connected to the second switching transistor, and is used to maintain a light-emitting state when the op amp voltage is normal, and switch from the light-emitting state to the off state when the op amp voltage is overvoltage.

[0009] In one embodiment of the present invention, the overcurrent protection module includes a current detector, a second reference source, a second comparator, and a third switching transistor; the current detector is connected to the load and the second comparator, respectively, for obtaining the op amp current and transmitting it to the second comparator; the second reference source is connected to the second comparator, for providing the second comparator with a standard current for the load operation; the second comparator is connected to the third switching transistor, for performing a secondary comparison between the load current and the standard current, and if it is determined that the load current is overcurrent, sending overcurrent feedback to the third switching transistor; the third switching transistor is connected to the load, and when the op amp current is normal, keeps the working state in the closed state to enable the load to operate normally, and when the op amp current is overcurrent, keeps the working state in the disconnected state to perform the overcurrent protection on the load.

[0010] In one embodiment of the present invention, the overcurrent protection module further includes a boost capacitor and a second light-emitting diode; the boost capacitor is connected to the second comparator, and is used to receive the second comparison result of the second comparator and control the display state of the second light-emitting diode; the second light-emitting diode is connected to the boost capacitor, and is used to remain in an off state when the op amp current is normal, and to switch from the off state to the light-emitting state when the op amp current is overcurrent.

[0011] In one embodiment of the present invention, the microcontroller includes a receiving module, a voltage regulation module and a current regulation module; the receiving module is used to receive overvoltage feedback sent by the first comparator; the voltage regulation module is used to perform a primary resistance adjustment on the feedback resistor of the inverting amplifier in response to the overvoltage feedback to achieve the secondary voltage regulation; the current regulation module is used to perform a secondary resistance adjustment on the base resistor of the transistor in response to the overvoltage feedback to achieve the secondary current regulation.

[0012] In one embodiment of the present invention, there are multiple power supply management devices, and each load is connected to a corresponding power supply management device.

[0013] In one embodiment of the present invention, all of the loads correspond to one power supply management device, and the loads correspond to load identifiers; the microcontroller obtains the running load identifier, and determines according to the load identifier that the corresponding running load is connected to the inverting amplifier and the transistor respectively, and the running load is at least one; the inverting amplifier transmits the operational amplifier voltage to the running load; the transistor transmits the operational amplifier current to the running load; the overvoltage protection module detects the overvoltage condition of the operational amplifier voltage of the running load, and when it is determined that the overvoltage is present, the running load is subjected to the overvoltage protection; the overcurrent protection module detects the overcurrent condition of the operational amplifier current of the running load, and when it is determined that the overcurrent is present, the running load is subjected to the overcurrent protection; the microcontroller performs three voltage adjustments on the operational amplifier voltage of the running load and three current adjustments on the operational amplifier current of the running load based on the overvoltage state of the running load.

[0014] In one embodiment of the present invention, the microcontroller determines the power supply management timing of each running load, and controls the closing and opening of the relays between the inverting amplifier and the transistor and each running load in sequence according to the power supply management timing, and there are multiple first relays.

[0015] In a second aspect, the present application provides a new energy vehicle, comprising at least one load, and using the new energy vehicle power supply system as described in the first aspect.

[0016] As described above, the new energy vehicle power supply system and new energy vehicle provided by the embodiments of the present invention have the following beneficial effects:

[0017] The system includes at least one load and at least one power supply management device. The power supply of each load is managed by the power supply management device, thereby realizing multi-channel power supply of the power supply system. Then, based on the high-precision reference source, inverting amplifier, transistor, overvoltage protection module, overcurrent protection module and microcontroller in the power supply management device, the current and voltage of each load are adjusted and controlled, which can realize the different power requirements of each load and the high voltage accuracy and current accuracy requirements of each load. At the same time, the overvoltage protection module and the overcurrent protection module can also monitor the overvoltage and overcurrent conditions of the corresponding load in real time, and the load has a protection function to ensure the normal and safe operation of each load.

[0018] It should be understood that the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the present application. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] The accompanying drawings are incorporated into and constitute a part of the specification, illustrating embodiments consistent with the present application and, together with the specification, serving to explain the principles of the present application. It is obvious that the drawings described below are merely some embodiments of the present application, and a person of ordinary skill in the art can derive other drawings based on these drawings without inventive effort. In the drawings:

[0020] Figure 1 This is a schematic diagram of an implementation environment of a new energy vehicle power supply system shown in an exemplary embodiment of the present application;

[0021] Figure 2 is a block diagram of a new energy vehicle power supply system shown in an exemplary embodiment of the present application;

[0022] Figure 3 This is a schematic diagram of a single-circuit power supply system for a new energy vehicle, shown in an exemplary embodiment of the present application;

[0023] Figure 4 This is a schematic diagram of a multi-channel power supply system for a new energy vehicle according to an exemplary embodiment of the present application;

[0024] Figure 5 This is a schematic diagram of a specific new energy vehicle power supply system shown in an exemplary embodiment of the present application;

[0025] Figure 6 This is a schematic diagram of another multi-channel power supply system for new energy vehicles according to an exemplary embodiment of the present application;

[0026] Figure 7 This is a structural diagram of an electronic device provided by an embodiment of the present application. DETAILED DESCRIPTION

[0027] The following describes the embodiments of the present invention with reference to the accompanying drawings and preferred embodiments. Those skilled in the art will readily appreciate the other advantages and benefits of the present invention from the disclosure herein. The present invention may also be implemented or applied through various other specific embodiments, and the various details in this specification may be modified or altered based on different viewpoints and applications without departing from the spirit of the present invention. It should be understood that the preferred embodiments are intended only to illustrate the present invention and are not intended to limit the scope of protection of the present invention.

[0028] It should be noted that the illustrations provided in the following embodiments are merely schematic illustrations of the basic concept of the present invention. Therefore, the illustrations only show components related to the present invention and are not drawn according to the number, shape, and size of components in actual implementation. In actual implementation, the type, quantity, and proportion of each component may be changed arbitrarily, and the component layout may also be more complex.

[0029] In the following description, numerous details are discussed to provide a more thorough explanation of the embodiments of the present invention. However, it will be apparent to those skilled in the art that the embodiments of the present invention may be practiced without these specific details. In other embodiments, well-known structures and devices are shown in block diagram form rather than in detail to avoid obscuring the embodiments of the present invention.

[0030] First, it's important to note that new energy vehicles (NEVs) are vehicles that utilize unconventional fuels as their power source, or utilize conventional fuels, new onboard power units, and integrate advanced technologies in vehicle power control and drive. These vehicles feature advanced technical principles, new technologies, and new structures. These include, but are not limited to, pure electric vehicles, extended-range electric vehicles, hybrid electric vehicles, fuel cell electric vehicles, and hydrogen engine vehicles. New energy vehicles primarily consist of: an electric drive system, which directly converts electrical energy into mechanical energy and consists of a drive motor (DM) and a drive motor controller (MCU); a power system consisting of two power sources: a large power battery that provides driving force to the four wheels through the drive motor and charges the 12V battery when the voltage is too low; and a secondary battery that provides power to the vehicle's low-voltage electrical components, such as wipers, lifts, and the body control module (BCM); and auxiliary systems, including the auxiliary power source, power steering, navigation system, and lighting.

[0031] The power supply system is the core component of new energy vehicles, responsible for converting electrical energy into kinetic energy to propel the vehicle. Due to the numerous loads in a vehicle, the power supply system needs to provide multiple power supplies to meet the power needs of each load. A load is an electronic component connected across a circuit with a potential difference between its two terminals. It is used to convert electrical energy into other forms of energy. It is a general term for various electrical appliances. Common loads include power-consuming components such as engines, light bulbs, air conditioners, and electric motors. Examples of loads in a vehicle include display screens, headlights and other lights, air conditioning motors, and radiator fans.

[0032] In a power supply system, the battery module can power each load separately through multiple independent power supply paths. The power control module then issues power supply control instructions to each power management module based on the power supply requirements of each load. Finally, the power management module controls the power supply of each module's power supply path according to the power supply control instructions. By independently controlling each power supply path, the terminal loads can be better managed. However, the voltage and current required by each load cannot be adjusted and controlled, nor can the high load voltage and current accuracy requirements be met. In addition, the load cannot perform self-protection and diagnosis for overvoltage and overcurrent conditions, thereby affecting the operation of each load.

[0033] Therefore, see Figure 1 , Figure 1 FIG. 1 is a schematic diagram of an implementation environment of a new energy vehicle power supply system according to an exemplary embodiment of the present application. Figure 1 As shown, the power supply system 1200 is embedded in the vehicle 1100. The power supply system 1200 includes at least one load and a power supply management device. The power supply management device is used to manage the power supply of each load in the new energy vehicle, realizing multi-channel power supply of the power supply system 1200. Then, based on the high-precision reference source, inverting amplifier, transistor, overvoltage protection module, overcurrent protection module and microcontroller in the power supply management device, the current and voltage of each load are regulated and controlled, which can meet the different power requirements of each load and meet the high voltage and current accuracy requirements of each load. At the same time, the overvoltage protection module and the overcurrent protection module can also monitor the overvoltage and overcurrent conditions of the corresponding load in real time, have a protection function for the load, and ensure the normal and safe operation of each load.

[0034] See Figure 2 , Figure 2 This is a block diagram of a new energy vehicle power supply system 2000 according to an exemplary embodiment of the present application. Figure 1 The implementation environment shown is shown. It should be understood that the system can also be applied to other exemplary implementation environments, and this embodiment does not limit the implementation environment to which the system is applicable.

[0035] like Figure 2 As shown, in an exemplary embodiment, a new energy vehicle power supply system 2000 includes at least one load 2100 and a power supply management device 2200. The power supply management device 2200 manages the power supply of the load 2100. The power supply management device 2200 includes at least a high-precision reference source 2210, an inverting amplifier 2220, a transistor 2230, an overvoltage protection module 2240, an overcurrent protection module 2250, and a microcontroller 2260. The details are as follows:

[0036] The high-precision reference source 2210 is connected to the inverting amplifier and the triode, respectively, and is used to transmit the reference output voltage to the inverting amplifier and transmit the reference output current to the triode.

[0037] It should be noted that the high-precision reference source includes a high-precision voltage reference source and a high-precision current reference source. Among them, the high-precision voltage reference source is a voltage source with high-stability voltage output, while the high-precision current reference source can provide high-precision and high-stability current output; the inverting amplifier has the function of amplifying the input signal and inverting the output, and can amplify the reference output voltage; the transistor is a semiconductor device that controls current, which can amplify weak signals into larger electrical signals and can amplify the reference output current.

[0038] The inverting amplifier 2220 is connected to the load and is used to perform a voltage adjustment on the received reference output voltage, output the operational amplifier voltage and transmit it to the load.

[0039] Considering that while a high-precision reference source can output a highly accurate reference output voltage, the numerous loads in new energy vehicles often make the reference output voltage insufficient to meet the operating voltage requirements of each load. Therefore, the reference output voltage provided by the high-precision reference source must first be regulated by an inverting amplifier, primarily performing voltage amplification. This amplification is performed proportionally by a certain coefficient to obtain the load's op amp voltage, thereby meeting the power requirements of each load. It should be noted that the composition of the inverting amplifier and the principle of signal amplification are mature existing technologies and will not be discussed in detail here.

[0040] The transistor 2230 is connected to the load and is used to perform a primary current regulation on the received reference output current and output the operational amplifier current to the load.

[0041] Similarly, while a high-precision reference source can output a highly accurate reference output current, the numerous loads in new energy vehicles often make the reference output current insufficient to meet the voltage requirements of each load. Therefore, the reference output current provided by the high-precision reference source must first be regulated by a transistor, primarily for current amplification. This current is proportionally amplified by a certain coefficient to obtain the op amp current for the load, thereby meeting the power requirements of each load. It should be noted that transistor signal amplification is a mature existing technology and will not be discussed further here.

[0042] The overvoltage protection module 2240 is connected to the load and is used to perform overvoltage protection if it is determined that the operational amplifier voltage is overvoltage.

[0043] The op amp voltage obtained by the inverting amplifier is just an amplification of the reference output voltage. When multiple loads are running at the same time, it can only ensure that the op amp voltage transmitted by the inverting amplifier to each running load meets the power demand of each op amp voltage. However, the power demand of each load is different, and the op amp voltage received by each running load is the same. Therefore, it is necessary to further detect the op amp voltage of each running load and perform overvoltage protection on the overvoltage load to prevent a certain running load from causing abnormal operation and circuit burning due to overvoltage of the op amp voltage.

[0044] The overcurrent protection module 2250 is connected to the load and is used to perform overcurrent protection if it is determined that the operational amplifier current of the load is overcurrent.

[0045] The op amp current obtained by the transistor is just an amplification of the reference output current. When multiple loads are running at the same time, it can only ensure that the op amp current transmitted by the transistor to each running load meets the power demand of each op amp voltage. However, the power demand of each load is different, and the op amp current received by each running load is the same. Therefore, it is necessary to further detect the op amp current of each running load and perform overcurrent protection on the overcurrent load to prevent a certain running load from causing abnormal operation and circuit burning due to overvoltage of the op amp voltage.

[0046] The microcontroller 2260 is connected to the overvoltage protection module, the inverting amplifier and the triode respectively, and is used to perform secondary voltage regulation on the operational amplifier voltage and secondary current regulation on the operational amplifier current when the operational amplifier voltage is overvoltage.

[0047] It's important to note that the microcontroller (MCU) controls all electronic systems within the car, such as multimedia, audio, and navigation. As the module that controls motor operation, it primarily connects and controls various peripheral circuits and interface circuits in the car. Therefore, if a load experiences overvoltage or overcurrent, the MCU can regulate the voltage and current of the load's op amps to ensure proper operation.

[0048] See Figure 3 , Figure 3 This is a schematic diagram of a single-circuit power supply system for new energy vehicles, as shown in an exemplary embodiment of the present application. Figure 3As shown, assuming that the current action of the new energy vehicle only involves the operation of one load, the connection relationship of the power supply system is specifically as follows: a high-precision reference source is connected to the inverting amplifier and the transistor, respectively, to provide a reference output voltage to the inverting amplifier and a reference output current to the transistor; the inverting amplifier is connected to the load, and the transistor is also connected to the load, and the inverting amplifier provides the op amp voltage to the load, and the transistor provides the op amp current to the load, so as to operate the load; the load is further connected to the overvoltage protection module and the overcurrent protection module, respectively, wherein when the op amp voltage of the load is overvoltage, the overvoltage protection module protects the load, and when the op amp current of the load is overcurrent, the overcurrent protection module protects the load; the overvoltage protection module is further connected to the microcontroller, and when the op amp voltage of the load is overvoltage, overvoltage feedback is provided to the microcontroller; the microcontroller is further connected to the inverting amplifier and the transistor, respectively, to adjust and control the op amp voltage and op amp current of the load, so that the final voltage and current can ensure the normal operation of the load.

[0049] In one embodiment, there are multiple power management devices, and each load is connected to a corresponding power management device.

[0050] See Figure 4 , Figure 4 This is a schematic diagram of a multi-channel power supply system for new energy vehicles shown in an exemplary embodiment of the present application. Figure 4As shown, assuming that the current operation of the new energy vehicle involves the operation of multiple loads, such as n loads (n≥2), the connection relationship of the power supply system is specifically as follows: the high-precision reference source is connected to n inverting amplifiers and n transistors respectively, providing the same reference output voltage to the n inverting amplifiers and providing the same reference output current to the n transistors. N inverting amplifiers are connected to n loads one-to-one, and n transistors are also connected to n loads one-to-one. Each inverting amplifier and each transistor provides an op amp voltage and an op amp current to its corresponding load for the operation of the load. For example, inverting amplifier 1 and transistor 1 provide an op amp voltage and an op amp current to load 1, inverting amplifier 2 and transistor 2 provide an op amp voltage and an op amp current to load 2... Inverting amplifier n and transistor n provide an op amp voltage and an op amp current to load n. It should be noted that the amplification factor of each inverting amplifier and each transistor can be different according to the specific power requirements of its corresponding load. That is, the op amp voltage and op amp current output by each inverting amplifier and each transistor can be different due to the different corresponding loads. The n loads are connected to n overvoltage protection modules and n overcurrent protection modules, respectively. For example, load 1 is connected to overvoltage protection module 1 and overcurrent protection module 1, respectively; load 2 is connected to overvoltage protection module 2 and overcurrent protection module 2, respectively; and load n is connected to overvoltage protection module n and overcurrent protection module n, respectively. When the op amp voltage of a load experiences an overvoltage, its corresponding overvoltage protection module provides overvoltage protection. When the op amp current of a load experiences an overcurrent, its corresponding overcurrent protection module provides overcurrent protection. Each of the n overvoltage protection modules is connected to a microcontroller. When the op amp voltage of a load experiences an overvoltage, the overvoltage protection module corresponding to that load provides overvoltage feedback to the microcontroller. For example, when the op amp voltage of load 3 experiences an overvoltage, overvoltage protection module 3 provides overvoltage feedback regarding the overvoltage condition of load 3. The microcontroller is respectively connected to n inverting amplifiers and n transistors to adjust and control the op amp voltage and op amp current of the corresponding load according to the received overvoltage feedback. For example, if the microcontroller only receives the overvoltage feedback sent by the overvoltage protection module 3, it indicates that only load 3 has an overvoltage condition. At this time, the microcontroller adjusts and controls the op amp voltage and op amp current of load 3. If the microcontroller receives overvoltage feedback sent by the overvoltage protection module 3 and the overvoltage protection module 4, it indicates that both load 3 and load 4 have an overvoltage condition. At this time, the microcontroller adjusts and controls the op amp voltage and op amp current of load 3 and load 4.

[0051] It should be noted that regardless of the number of loads involved in the current operation of a new energy vehicle, the power supply system only has one high-precision reference source and microcontroller. However, when multiple loads are involved, the microcontroller and high-precision reference source are each combined with an inverting amplifier, a transistor, an overvoltage protection module, and an overcurrent protection module to form a power management device to manage power for each load. In other words, each power management device shares a single high-precision reference source and a single microcontroller.

[0052] Specifically, in one embodiment, the overvoltage protection module 2240 includes at least a voltage detector, a first reference source, a first comparator, and a first switching transistor; the voltage detector is respectively connected to the load and the first comparator, and is used to obtain the op amp voltage and transmit it to the first comparator; the first reference source is connected to the first comparator, and is used to provide the first comparator with a standard voltage for load operation; the first comparator is connected to the microcontroller, and is used to compare the op amp voltage with the standard voltage, and if it is determined that the op amp voltage is overvoltage, it sends overvoltage feedback to the microcontroller; the first switching transistor is connected to the first comparator and the load, and is used to keep the working state in the closed state when the op amp voltage is normal to enable the load to operate normally, and to keep the working state in the disconnected state when the op amp voltage is overvoltage to protect the load from overvoltage.

[0053] In this embodiment, a first reference source provides a standard voltage for load operation to the first comparator. It should be understood that each load corresponds to an overvoltage protection module, and each overvoltage protection module contains a reference source that provides the first comparator with the standard voltage for load operation, serving as a criterion for determining whether the op amp voltage of the load is overvoltage. Furthermore, the switching transistor functions as a circuit interrupter, performing both circuit disconnection and connection. When the load's op amp voltage is overvoltage, the switching transistor disconnects the circuit, preventing circuit failure caused by overvoltage.

[0054] Furthermore, in one embodiment, the overvoltage protection module 2240 also includes a second switching transistor and a first light-emitting diode; the second switching transistor is connected to the first comparator, and is used to receive the first comparison result of the first comparator and control the display state of the first light-emitting diode; the first light-emitting diode is connected to the second switching transistor, and is used to maintain a light-emitting state when the op amp voltage is normal, and to switch from a light-emitting state to an off state when the op amp voltage is overvoltage.

[0055] In this example, the first comparison result includes the op amp voltage being less than or equal to the standard voltage and the op amp voltage being greater than the standard voltage. When the op amp voltage is less than or equal to the standard voltage, it indicates that the op amp voltage is normal, the second switching transistor is in the off state, that is, the circuit remains conductive, and the first light-emitting diode remains illuminated. When the op amp voltage is greater than the standard voltage, it indicates that the op amp voltage is overvoltage, the second switching transistor is in the off state, that is, the circuit is disconnected, and the first light-emitting diode switches from the illuminated state to the off state. The display state of the first light-emitting diode indicates to the outside world whether the load's op amp voltage is overvoltage, without the need for tools, thereby enhancing human-vehicle interaction.

[0056] Specifically, in one embodiment, the overcurrent protection module 2250 includes at least a current detector, a second reference source, a second comparator, and a third switching transistor; the current detector is respectively connected to the load and the second comparator, and is used to obtain the operational amplifier current and transmit it to the second comparator; the second reference source is connected to the second comparator, and is used to provide the second comparator with a standard current for load operation; the second comparator is connected to the third switching transistor, and is used to perform a secondary comparison between the load current and the standard current, and if it is determined that the load current is overcurrent, overcurrent feedback is sent to the third switching transistor; the third switching transistor is connected to the load, and is used to keep the working state in the closed state when the operational amplifier current is normal, so that the load can operate normally, and to keep the working state in the disconnected state when the operational amplifier current is overcurrent, so as to protect the load from overcurrent.

[0057] In this embodiment, a second reference source provides a standard load operating current to the second comparator. It should be understood that each load corresponds to an overcurrent protection module, and each overcurrent protection module includes a reference source that provides the second comparator with the standard load operating current, serving as a criterion for determining whether the load's op amp current is overcurrent. Furthermore, if the load's op amp current overcurrents, a third switching transistor disconnects the circuit to prevent circuit failure caused by the overcurrent.

[0058] Furthermore, in one embodiment, the overcurrent protection module 2250 also includes a boost capacitor and a second light-emitting diode; the boost capacitor is connected to the second comparator, and is used to receive the second comparison result of the second comparator and control the display state of the second light-emitting diode; the second light-emitting diode is connected to the boost capacitor, and is used to maintain an off state when the op amp current is normal, and to switch from the off state to the light-emitting state when the op amp current is overcurrent.

[0059] In this example, the second comparison result includes the op amp current being less than or equal to the standard current and the op amp current being greater than the standard current. When the op amp current is less than or equal to the standard current, it indicates that the op amp current is normal, the third switch transistor is in the off state, that is, the circuit is disconnected, and the second light-emitting diode remains off. When the op amp current is greater than the standard current, it indicates that the op amp current is overvoltage, the second switch transistor is in the off state, that is, the circuit remains conductive, and the second light-emitting diode switches from the off state to the light-emitting state. The display state of the second light-emitting diode indicates to the outside world whether the op amp current of the load is overcurrent, without the need for tools, thereby enhancing human-vehicle interaction.

[0060] In addition, since each load corresponds to its own overvoltage protection module and overcurrent protection module, when the op amp voltage of a load is overvoltage or the op amp current is overcurrent, the display status of the first light-emitting diode in the corresponding overvoltage protection module will indicate the op amp voltage of the corresponding load, and the display status of the second light-emitting diode in the corresponding overcurrent protection module will indicate the op amp current of the corresponding load, which can locate the overvoltage load or overcurrent load, facilitating subsequent debugging and maintenance of the load.

[0061] Specifically, in one embodiment, the microcontroller 2260 includes a receiving module, a voltage regulation module and a current regulation module; the receiving module is used to receive the overvoltage feedback sent by the first comparator; the voltage regulation module is used to perform a primary resistance adjustment on the feedback resistor of the inverting amplifier 2220 in response to the overvoltage feedback to achieve secondary voltage regulation; the current regulation module is used to perform a secondary resistance adjustment on the base resistor of the transistor 2230 in response to the overvoltage feedback to achieve secondary current regulation.

[0062] It should be noted that after receiving the overvoltage feedback from the first comparator, the microcontroller will respond to the overvoltage feedback and adjust the op amp voltage and op amp current of the load. The op amp voltage is regulated by adjusting the feedback resistor of the inverting amplifier corresponding to the load, and the op amp current is regulated by adjusting the base resistor of the transistor corresponding to the load, that is, the adjustment amplification value of the inverting amplifier for the reference output voltage is controlled and changed, and the adjustment amplification value of the transistor for the reference output current is controlled and changed. For loads whose op amp voltage is not overvoltage, the microcontroller will not perform secondary voltage regulation on their op amp voltage or secondary current regulation on their op amp current because it does not receive their overvoltage feedback. This can meet the power demand of each running load and ensure the normal operation of each running load.

[0063] See Figure 5 , Figure 5 This is a schematic diagram of a specific new energy vehicle power supply system shown in an exemplary embodiment of the present application. Figure 5As shown, loads 1 through n are assumed to be operational loads and require power. First, a high-precision reference source is connected to inverting amplifiers 1 through n, and to transistors 1 through n, respectively, providing a reference output voltage for each inverting amplifier and a reference output current for each transistor. Inverting amplifiers 1 through n are connected to loads 1 through n, respectively, providing op amp voltages for these loads, and transistors 1 through n are connected to loads 1 through n, respectively, providing op amp currents for these loads.

[0064] Loads 1-n then begin operating after receiving the op amp voltage and current. Voltage detectors 1-n are connected to loads 1-n, respectively, obtaining the op amp voltages of their respective loads and sending them to comparators 1-1-n-1. Reference sources 1-1-n-1 are then connected to comparators 1-1-n-1, respectively, to provide standard voltages for their respective loads. Comparators 1-1-n-1 then compare the received op amp voltages with the standard voltages to determine whether the operating voltage of their respective loads is overvoltage. Switching transistors 1-1-n-1 are connected to comparators 1-1-n-1 and loads 1-n, respectively. When the operating voltage of their respective loads is overvoltage, they change their operating state to the disconnected state, disconnecting the circuit of the load and providing overvoltage protection. The switching transistors 1-2 to n-2 are respectively connected to the comparators 1-1 to n-1 and respectively connected to the light-emitting diodes 1-1 to n-1. When an overvoltage occurs, the corresponding switching transistor among the switching transistors 1-2 to n-2 is turned off, so that the corresponding light-emitting diodes among the light-emitting diodes 1-1 to n-1 are turned off.

[0065] Simultaneously, current detectors 1-n are connected to loads 1-n, respectively, to obtain the operational amplifier currents of their respective loads and transmit them to comparators 1-2-n-2. Reference sources 1-2-n-2 are then connected to comparators 1-2-n-2, respectively, to provide standard currents for their respective loads. Comparators 1-2-n-2 then compare the received operational amplifier currents with the standard currents to determine whether the operating currents of their respective loads are overvoltage. Switching transistors 1-3-n-3 are connected to comparators 1-2-n-2 and loads 1-n, respectively. When the operating currents of their respective loads exceed these limits, they switch to an off state, disconnecting the circuits of their respective loads and providing overcurrent protection. Boosting capacitors 1-n are connected to comparators 1-2-n-2 and light-emitting diodes 1-2-n-2, respectively. When an overcurrent condition occurs, the corresponding boosting capacitor in boosting capacitors 1-n controls the corresponding light-emitting diode in light-emitting diodes 1-2-n-2 to maintain a constant light state.

[0066] Finally, comparators 1-1 through n-1 are connected to the MCU, providing overvoltage feedback. The MCU is then connected to inverting amplifiers 1 through n, adjusting the feedback resistors of the inverting amplifiers corresponding to the loads experiencing overvoltage, thereby regulating the op amp voltage. Furthermore, the MCU is connected to transistors 1 through n, adjusting the base resistors of the transistors corresponding to the loads experiencing overvoltage, thereby regulating the op amp current.

[0067] In another embodiment of the present application, the inverting amplifier and the transistor are respectively connected to the power supply.

[0068] It should be noted that the operation of the inverting amplifier and the triode requires a separate power supply. Another power supply can be connected to meet the power requirements.

[0069] In another embodiment of the present application, all loads correspond to one power supply management device, and the loads correspond to load identifiers; the microcontroller obtains the running load identifier, and determines that the corresponding running load is connected to the inverting amplifier and the transistor respectively according to the load identifier, and there is at least one running load; the inverting amplifier transmits the op amp voltage to the running load; the transistor transmits the op amp current to the running load; the overvoltage protection module detects the overvoltage condition of the op amp voltage of the running load, and when it is determined to be overvoltage, the running load is protected from overvoltage; the overcurrent protection module detects the overcurrent condition of the op amp current of the running load, and when it is determined to be overcurrent, the running load is protected from overcurrent; the microcontroller performs three voltage adjustments on the op amp voltage of the running load and three current adjustments on the op amp current of the running load based on the overvoltage state of the running load.

[0070] As a possible embodiment, it can be assumed that all loads in a new energy vehicle correspond to a power supply management device, and each load has a corresponding load identifier. The microcontroller can use the identified load identifiers to determine the operating load that needs to be run corresponding to the current action of the new energy vehicle. When there are two or more operating loads, the microcontroller determines that the operating loads are connected to the inverting amplifier and transistor respectively. The inverting amplifier transmits the op amp voltage to the operating load, and the transistor transmits the op amp current to the operating load. The overvoltage protection module in the power supply management is connected to the overvoltage load for overvoltage protection, and the overcurrent protection module is also connected to the overcurrent load for overcurrent protection.

[0071] Furthermore, in one embodiment, the microcontroller determines the power management timing of each operating load, and controls the closing and opening of the relays between the inverting amplifier and the transistor and each operating load in sequence according to the power management timing, and there are multiple first relays.

[0072] See Figure 6 , Figure 6FIG. 1 is a schematic diagram of another multi-channel power supply system for new energy vehicles according to an exemplary embodiment of the present application. Figure 6 As shown, the microcontroller determines the power supply management timing of each running load, and controls the closing and opening of the relay between the inverting amplifier and the transistor and each running load according to the power supply management timing, thereby providing the operational amplifier voltage and operational amplifier current to each running load in sequence, and the overvoltage protection module and the overcurrent protection module also perform overvoltage protection of the operational amplifier voltage and overcurrent protection of the operational amplifier current for the running load in sequence.

[0073] The new energy vehicle power supply system provided in the above embodiment includes at least one load and at least one power supply management device. By corresponding one power supply management device to each load, multi-channel power supply of the power supply system is realized. Then, based on the high-precision reference source, inverting amplifier, transistor, overvoltage protection module, overcurrent protection module and microcontroller in the power supply management device, the current and voltage of each load are adjusted and controlled, which can meet the different power requirements of each load and meet the high voltage accuracy and current accuracy requirements of each load. At the same time, the overvoltage protection module and the overcurrent protection module can also monitor the overvoltage and overcurrent conditions of the corresponding load in real time, and the load has a protection function to ensure the normal and safe operation of each load.

[0074] In an exemplary embodiment, the embodiment of the present application further provides a new energy vehicle, which includes the new energy vehicle power supply system provided by the above embodiment.

[0075] See Figure 7 , Figure 7 This is a structural diagram of an electronic device provided by an embodiment of the present application. Figure 7 The following is a schematic diagram showing the structure of a computer system suitable for implementing an electronic device according to an embodiment of the present application. Figure 7 The computer system 700 of the electronic device shown is only an example and should not bring any limitation to the functions and scope of use of the embodiments of the present application.

[0076] like Figure 7As shown, computer system 700 includes a central processing unit (CPU) 701, which can perform various appropriate actions and processes according to the program stored in read-only memory (ROM) 702 or the program loaded from storage portion 708 into random access memory (RAM) 703, such as executing the method in the above embodiment. Various programs and data required for system operation are also stored in RAM 703. CPU 701, ROM 702 and RAM 703 are connected to each other via bus 704. Input / output (I / O) interface 705 is also connected to bus 704.

[0077] The following components are connected to the I / O interface 705: an input section 706 including a keyboard, a mouse, and the like; an output section 707 including devices such as a cathode ray tube (CRT), a liquid crystal display (LCD), and a speaker; a storage section 708 including a hard disk and the like; and a communication section 709 including a network interface card such as a LAN (Local Area Network) card or a modem. The communication section 709 performs communication processing via a network such as the Internet. A drive 710 is also connected to the I / O interface 705 as needed. Removable media 711, such as a magnetic disk, an optical disk, a magneto-optical disk, or a semiconductor memory, is installed in the drive 710 as needed, so that computer programs read therefrom can be installed into the storage section 708 as needed.

[0078] In particular, according to an embodiment of the present application, the process described above with reference to the flowchart can be implemented as a computer software program. For example, an embodiment of the present application includes a computer program product, which includes a computer program carried on a computer-readable medium, and the computer program includes a computer program for executing the method shown in the flowchart. In such an embodiment, the computer program can be downloaded and installed from a network via the communication section 709, and / or installed from a removable medium 711. When the computer program is executed by the central processing unit (CPU) 701, the various functions defined in the system of the present application are executed.

[0079] It should be noted that the computer-readable medium shown in the embodiments of the present application can be a computer-readable signal medium or a computer-readable storage medium or any combination of the above two. The computer-readable storage medium can be, for example, an electrical, magnetic, optical, electromagnetic, infrared, or semiconductor system, device or device, or any combination of the above. More specific examples of computer-readable storage media can include, but are not limited to: an electrical connection with one or more wires, a portable computer disk, a hard disk, a random access memory (RAM), a read-only memory (ROM), an erasable programmable read-only memory (EPROM), a flash memory, an optical fiber, a portable compact disk read-only memory (CD-ROM), an optical storage device, a magnetic storage device, or any suitable combination of the above. In the present application, a computer-readable signal medium can include a data signal propagated in baseband or as part of a carrier wave, which carries a computer-readable computer program. This propagated data signal can take a variety of forms, including but not limited to an electromagnetic signal, an optical signal, or any suitable combination of the above. A computer-readable signal medium may also be any computer-readable medium other than a computer-readable storage medium that can transmit, propagate, or transport a program for use by or in connection with an instruction execution system, apparatus, or device. A computer program embodied on a computer-readable medium may be transmitted using any suitable medium, including but not limited to wireless, wired, or any suitable combination thereof.

[0080] The flowcharts and block diagrams in the accompanying drawings illustrate the possible architectures, functions and operations of the systems, methods and computer program products according to various embodiments of the present invention. Each box in the flowchart or block diagram can represent a module, program segment, or part of the code, and the above-mentioned module, program segment, or part of the code contains one or more executable instructions for implementing the specified logical function. It should also be noted that in some alternative implementations, the functions marked in the boxes can also occur in an order different from that marked in the accompanying drawings. For example, two boxes shown in succession can actually be executed substantially in parallel, and they can sometimes be executed in the opposite order, depending on the functions involved. It should also be noted that each box in the block diagram or flowchart, and the combination of boxes in the block diagram or flowchart, can be implemented using a dedicated hardware-based system that performs the specified function or operation, or can be implemented using a combination of dedicated hardware and computer instructions.

[0081] The units involved in the embodiments of the present invention may be implemented in software or hardware, and the units described may also be provided in a processor. In some cases, the names of these units do not limit the units themselves.

[0082] The present invention also provides a computer-readable storage medium having a computer program stored thereon. When executed by a computer processor, the computer program causes the computer to implement the aforementioned new energy vehicle power supply system. The computer-readable storage medium may be included in the electronic device described in the above embodiments, or may exist independently and not be incorporated into the electronic device.

[0083] The above embodiments are merely illustrative of the principles and effects of the present invention and are not intended to limit the present invention. Anyone skilled in the art may modify or alter the above embodiments without departing from the spirit and scope of the present invention. Therefore, any equivalent modifications or alterations made by one of ordinary skill in the art without departing from the spirit and technical principles disclosed herein are intended to be covered by the claims of the present invention.

Claims

1. A new energy vehicle power supply system, characterized in that: The system includes multiple loads and a power supply management device, wherein the power supply management device manages the power supply of the loads, and the power supply management device includes a high-precision reference source, an inverting amplifier, a transistor, an overvoltage protection module, an overcurrent protection module and a microcontroller; The high-precision reference source is connected to the inverting amplifier and the triode, respectively, and is used to transmit the reference output voltage to the inverting amplifier and transmit the reference output current to the triode; The inverting amplifier is connected to the load and is used to perform a voltage adjustment on the received reference output voltage, output an operational amplifier voltage and transmit it to the load; The triode is connected to the load and is used to perform a primary current regulation on the received reference output current and output the operational amplifier current to the load; The overvoltage protection module is connected to the load and is used to perform overvoltage protection if it is determined that the operational amplifier voltage is overvoltage; The overcurrent protection module is connected to the load and is used to perform overcurrent protection if it is determined that the operational amplifier current of the load is overcurrent; The microcontroller is connected to the overvoltage protection module, the inverting amplifier and the triode respectively, and is used to perform secondary voltage regulation on the operational amplifier voltage and secondary current regulation on the operational amplifier current when the operational amplifier voltage is overvoltage.

2. The new energy vehicle power supply system according to claim 1, characterized in that: The overvoltage protection module includes a voltage detector, a first reference source, a first comparator, and a first switching transistor; The voltage detector is connected to the load and the first comparator respectively, and is used to obtain the operational amplifier voltage and transmit it to the first comparator; The first reference source is connected to the first comparator and is used to provide the first comparator with a standard voltage for the load operation; The first comparator is connected to the microcontroller and is used to compare the op amp voltage with the standard voltage, and if it is determined that the op amp voltage is overvoltage, send overvoltage feedback to the microcontroller; The first switching transistor is connected to the first comparator and the load, and is used to keep the working state in the closed state when the op amp voltage is normal to enable the load to operate normally, and to keep the working state in the disconnected state when the op amp voltage is overvoltage to provide the load with overvoltage protection.

3. The new energy vehicle power supply system according to claim 2, characterized in that: The overvoltage protection module further includes a second switching transistor and a first light emitting diode; The second switching transistor is connected to the first comparator, and is used to receive the first comparison result of the first comparator and control the display state of the first light emitting diode; The first light emitting diode is connected to the second switching transistor, and is used to maintain a light-emitting state when the operational amplifier voltage is normal, and switch from a light-emitting state to an off state when the operational amplifier voltage is overvoltage.

4. The new energy vehicle power supply system according to claim 1, characterized in that: The overcurrent protection module includes a current detector, a second reference source, a second comparator, and a third switching transistor; The current detector is connected to the load and the second comparator respectively, and is used to obtain the operational amplifier current and transmit it to the second comparator; The second reference source is connected to the second comparator and is used to provide the second comparator with a standard current for the load operation; The second comparator is connected to the third switching transistor and is used to perform a secondary comparison between the load current and the standard current, and send an overcurrent feedback to the third switching transistor if it is determined that the load current is overcurrent; The third switching transistor is connected to the load and is used to keep the working state in the closed state when the operational amplifier current is normal so that the load can operate normally, and to keep the working state in the disconnected state when the operational amplifier current is overcurrent so as to provide the load with overcurrent protection.

5. The new energy vehicle power supply system according to claim 4, characterized in that: The overcurrent protection module further includes a boost capacitor and a second light emitting diode; The boost capacitor is connected to the second comparator, and is used to receive the second comparison result of the second comparator and control the display state of the second light emitting diode; The second light emitting diode is connected to the boost capacitor, and is configured to remain in an off state when the operational amplifier current is normal, and switch from the off state to a light emitting state when the operational amplifier current is overcurrent.

6. The new energy vehicle power supply system according to claim 1, characterized in that: The microcontroller includes a receiving module, a voltage regulating module and a current regulating module; The receiving module is configured to receive the overvoltage feedback sent by the first comparator; The voltage regulation module is configured to perform a primary resistance adjustment on the feedback resistor of the inverting amplifier in response to the overvoltage feedback, so as to achieve the secondary voltage regulation; The current regulation module is used to perform secondary resistance regulation on the base resistance of the transistor in response to the overvoltage feedback, so as to achieve the secondary current regulation.

7. The new energy vehicle power supply system according to any one of claims 1 to 6, characterized in that: There are multiple power supply management devices, and each load is connected to a corresponding power supply management device.

8. The new energy vehicle power supply system according to any one of claims 1 to 6, characterized in that: All the loads correspond to one power supply management device, and the loads correspond to load identifiers; The microcontroller obtains an operating load identifier, and determines, according to the load identifier, that a corresponding operating load is connected to the inverting amplifier and the transistor respectively, wherein the operating load is at least one; The inverting amplifier transmits the operational amplifier voltage to the operating load; The triode transmits the operational amplifier current to the operating load; The overvoltage protection module detects an overvoltage condition of the operational amplifier voltage of the operating load, and performs the overvoltage protection on the operating load when an overvoltage condition is determined; The overcurrent protection module detects the overcurrent condition of the operational amplifier current of the running load, and performs the overcurrent protection on the running load when an overcurrent is determined; The microcontroller performs secondary voltage regulation on the operational amplifier voltage of the operational load and performs secondary current regulation on the operational amplifier current of the operational load based on the overvoltage state of the operational load.

9. The new energy vehicle power supply system according to claim 8, characterized in that: The microcontroller determines the power supply management timing of each operating load, and controls the closing and opening of the relays between the inverting amplifier and the transistor and each operating load in sequence according to the power supply management timing, wherein the relays are multiple.

10. A new energy vehicle, characterized in that: The invention comprises multiple loads and uses the new energy vehicle power supply system as described in any one of claims 1 to 9.

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