An uninterruptible power supply protection circuit and method

Abstract

The application belongs to the technical field of power protection, and more particularly relates to a continuous power starting power protection circuit and a protection method, wherein the continuous power starting power protection circuit comprises a main control unit, an acquisition unit, a voltage unit, a power switch and a bypass current limiting circuit; wherein the bypass current limiting circuit comprises a bypass current limiting topology circuit one or a bypass current limiting topology circuit two; through the specific circuit structure of the bypass current limiting topology circuit, small current discharge can be realized when the system abnormally occurs, such as when the battery voltage, temperature and the like alarm the main switch Q1 and Q2 must be closed, and the vehicle power failure or the starting power failure to charge can be effectively avoided.

Description

TECHNICAL FIELD

[0001] The application belongs to the technical field of power supply protection, and more particularly relates to a continuous power supply protection circuit and protection method for starting. BACKGROUND

[0002] A battery management system (BMS) is an electronic device specifically designed to supervise and manage battery packs. Its main functions include parameter acquisition and monitoring, safety protection, intelligent charging and discharging control, state monitoring and state of charge (SOC) evaluation, etc. The BMS calculates and controls the charging and discharging process of the battery by collecting parameters such as voltage, current, temperature, and state of charge (SOC) of the battery, to achieve protection and performance improvement of the battery. The specific functions include: parameter acquisition and monitoring: monitor the voltage, current, temperature and other parameters of the battery to ensure that the battery operates within a safe range, safety protection: prevent overcharging, overdischarging and short circuit of the battery to protect the battery from damage, intelligent charging and discharging control: adjust the charging and discharging strategy according to the state of the battery to optimize the efficiency of the battery, state monitoring and state of charge evaluation: monitor the health status and remaining capacity of the battery in real time to provide accurate battery usage information. The battery management system (BMS) of the lithium-ion automobile starting battery monitors the voltage, current, temperature and other key parameters of the battery pack in real time to evaluate the state of the battery, and uses fault diagnosis algorithms to ensure the safe, stable and efficient operation of the battery pack.

[0003] The automobile starting power supply, also known as automobile emergency starting power supply or automobile jumper power supply, is a portable power supply device mainly used to provide emergency starting capability when the automobile cannot be started due to insufficient battery power or other reasons. The existing lithium-ion automobile starting power supply adopts a general BMS scheme. When the starting battery alarms, the battery management system (BMS) will cut off the battery output, and the vehicle's anti-theft system, alarm, headlights, remote control and other devices will not work normally. SUMMARY

[0004] The present application aims to provide a continuous power supply protection circuit and protection method for starting battery management system, which can provide a small current discharge circuit in the protection state of the starting battery to ensure the power supply of the vehicle host, and improve the performance, safety and stability of the battery pack.

[0005] To solve the above technical problems, the present application specifically provides the following technical solution: a continuous power supply protection circuit for starting battery management system (BMS), which specifically comprises: a bypass current limiting circuit, the bypass current limiting circuit comprises a bypass current limiting topology circuit one or a bypass current limiting topology circuit two.

[0006] Preferably, the bypass current limiting topology circuit comprises a diode DS1, a diode DS2, an inductor LS1, a MOS tube QS1, a MOS tube QS2, a MOS tube QS3, a MOS tube QS4; wherein the positive pole of the diode DS1 is connected with the QS2 and the LS1 respectively, the negative pole of the diode DS1 is connected with the positive pole of the starting power supply, the positive pole of the DS2 is connected with the inductor LS1 and the QS1 respectively, the input stage of the MOS tube QS1 is connected with the diode DS2 and the inductor LS1 respectively, the output stage of the MOS tube QS1 is connected with the negative pole of the starting power supply and the MOS tube QS4 through a current sensor, the G pole of the MOS tube QS2 is connected with a pulse controller (PWM), the input stage of the MOS tube QS2 is connected with the diode DS1 and the inductor LS1 respectively, the output stage of the MOS tube QS2 is connected with the negative pole of the starting power supply through a current sensor, the G pole of the MOS tube QS2 is connected with a pulse controller (PWM); the input stage of the MOS tube QS3 is connected with the negative pole of the starting power supply and is connected with the MOS tube QS2 through a current sensor, the output stage of the MOS tube QS3 is connected with the MOS tube QS4, the input stage of the MOS tube QS4 is connected with the negative pole of the starting power supply and is connected with the MOS tube QS1 through a current sensor, the output stage of the MOS tube QS4 is connected with the MOS tube QS3.

[0007] Preferably, the bypass current limiting topology circuit two comprises diode DS3, diode DS4, diode DS5, diode DS6, inductor LS2, inductor LS3, MOS tube QS5, MOS tube QS6, MOS tube QS7, MOS tube QS8; wherein the positive pole of the diode DS3 is connected with the QS6 and the LS3 respectively, the negative pole of the diode DS1 is connected with the positive pole of the starting power supply, the positive pole of the diode DS4 is connected with the QS5 and the LS2 respectively, the negative pole of the diode DS1 is connected with the positive pole of the starting power supply, the positive pole of the diode DS5 is connected with the negative pole of the starting power supply, the negative pole of the diode DS5 is connected with the diode DS4 and the MOS tube QS5 through the inductor LS2 respectively, the positive pole of the diode DS6 is connected with the negative pole of the starting power supply, the negative pole of the diode DS5 is connected with the diode DS3 and the MOS tube QS6 through the inductor LS3 respectively, the output stage of the MOS tube QS1 is connected with the negative pole of the starting power supply through a current sensor, the G pole of the MOS tube QS6 is connected with a pulse controller (PWM), the input stage of the MOS tube QS6 is connected with the diode DS3 and the inductor LS3 respectively, the output stage of the MOS tube QS6 is connected with the negative pole of the starting power supply through a current sensor, the G pole of the MOS tube QS6 is connected with a pulse controller (PWM); the input stage of the MOS tube QS5 is connected with the inductor LS2 and the diode DS4, the output stage of the MOS tube QS5 is connected with the negative pole of the starting power supply through a current sensor, the G pole of the MOS tube QS5 is connected with a pulse controller (PWM); the input stage of the MOS tube QS7 is connected with the negative pole of the starting power supply and connected with the MOS tube QS6 through a current sensor, the output stage of the MOS tube QS7 is connected with the MOS tube QS8, the input stage of the MOS tube QS8 is connected with the negative pole of the starting power supply and connected with the MOS tube QS5 through a current sensor, the output stage of the MOS tube QS8 is connected with the MOS tube QS7.

[0008] Preferably, the BMS system comprises a master control unit (MCU), an acquisition unit (AFE), a voltage unit (Buck DC / DC), a power switch (MOSFET) and a bypass current limiting unit; wherein the master control unit (MCU) is connected with the acquisition unit (AFE), the voltage unit (Buck DC / DC), the acquisition unit (AFE) is connected with the power switch (MOSFET), the voltage unit (Buck DC / DC) and the master control unit (MCU), the voltage unit (Buck DC / DC) is connected with the acquisition unit (AFE) and the master control unit (MCU), and the power switch (MOSFET) is connected with the acquisition unit (AFE) and the bypass current limiting unit.

[0009] Preferably, the master control unit (MCU) comprises a CAN module, a GPIO interface, and an I2C communication interface.

[0010] Preferably, the acquisition unit (AFE) comprises a basic protection logic unit, a power management module, a voltage measurement module, a temperature measurement module, a current measurement module, a MOSFET driving module, a communication interface module, and a load detection module.

[0011] Preferably, the basic protection logic unit is configured to control the protection function of the starting power supply, the voltage measurement module is configured to realize the management of the starting power supply by the power management module, the voltage measurement module is configured to realize the voltage monitoring of the starting power supply and the balanced driving of the starting power supply, the temperature measurement module is configured to realize the temperature measurement of the starting power supply, the current measurement module is configured to realize the current monitoring of the starting power supply, the MOSFET driving module is configured to drive the power switch (MOSFET), the communication interface module is configured to realize the bidirectional communication with the MCU module, and the load detection module is configured to realize the detection of the connected load and the detection of the charging.

[0012] According to another aspect of the present application, there is provided a protection method of the uninterruptible starting power supply protection circuit, which realizes the uninterruptible protection of the starting power supply by using the above-mentioned uninterruptible starting power supply protection circuit.

[0013] According to another aspect of the present application, there is provided an electronic device comprising a processor and a memory, wherein the memory stores a program or instructions executable on the processor, and the program or instructions are executed by the processor to realize each step of the protection method of the uninterruptible starting power supply protection circuit.

[0014] According to another aspect of the present application, there is provided a computer readable storage medium, wherein the computer readable storage medium stores a data processing program, and the data processing program is executed by the processor to realize each step of the protection method of the uninterruptible starting power supply protection circuit.

[0015] Compared with the prior art, the present application has the following advantages:

[0016] The application provides a start power protection circuit and method, which comprises a master control unit, a collection unit, a voltage unit, a power switch and a bypass current limiting circuit. BRIEF DESCRIPTION OF DRAWINGS

[0017] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings needed to be used in the embodiments or the prior art description will be briefly introduced. Obviously, the drawings in the following description are only exemplary, and other drawings can be obtained by the provided drawings without creative labor for those skilled in the art.

[0018] Figure 1 The application provides a start power protection circuit and method, which comprises a master control unit, a collection unit, a voltage unit, a power switch and a bypass current limiting circuit.

[0019] Figure 2 The application provides a start power protection circuit and method, which comprises a master control unit, a collection unit, a voltage unit, a power switch and a bypass current limiting circuit.

[0020] Figure 3 The application provides a start power protection circuit and method, which comprises a master control unit, a collection unit, a voltage unit, a power switch and a bypass current limiting circuit. DETAILED DESCRIPTION

[0021] The technical solutions in the embodiments of the present application will be described clearly and completely below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only some of the embodiments of the present application, not all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor are within the protection scope of the present application.

[0022] The concepts involved in the present application will be described below with reference to the drawings. It should be pointed out here that the following descriptions of the concepts are only to make the content of the present application easier to understand, and do not limit the protection scope of the present application. Meanwhile, the embodiments in the present application and the features in the embodiments can be combined with each other without conflict. The present application will be described in detail below with reference to the drawings and in combination with the embodiments.

[0023] Figure 1 The circuit structure diagram of the vehicle BMS system with the start power protection circuit is shown in the application, as shown in Figure 1The illustrated circuit of the vehicle BMS system with increased un-interruptible start-up power protection circuit specifically includes:

[0024] A master control unit (MCU), an acquisition unit (AFE), a voltage unit (Buck DC / DC), a power switch (MOSFET), and a bypass current limiting circuit; wherein the master control unit (MCU) is connected with the acquisition unit (AFE) and the voltage unit (Buck DC / DC), the acquisition unit (AFE) is connected with the power switch (MOSFET), the voltage unit (Buck DC / DC), and the master control unit (MCU), the voltage unit (Buck DC / DC) is connected with the acquisition unit (AFE) and the master control unit (MCU), and the power switch (MOSFET) is connected with the acquisition unit (AFE) and the bypass current limiting circuit.

[0025] The master control unit (MCU) includes a CAN module, a GPIO interface, and an I2C communication interface.

[0026] The CAN module is an intelligent electric control device for realizing data communication between various electronic control devices of a whole vehicle, which adopts a 16-bit microcontroller, supports CAN2.0A and CAN2.0B protocols, and is developed according to the SAE J1939 standard. The CAN module can realize communication of high-speed and low-speed CAN bus networks, has good sealing property, and is suitable for various harsh environments. The CAN module is widely used in the fields of automobiles, industrial control and communication, has the characteristics of high reliability, real-time and high flexibility, and is suitable for high-security distributed real-time control occasions. In the design of automobiles, the CAN module is a key technology for realizing regional network control system of vehicle-mounted electric control devices. The CAN module has the following characteristics: high reliability: the CAN module adopts a distributed communication architecture, has the characteristics of high-speed transmission, strong anti-interference ability and good reliability; flexibility and real-time: suitable for high-security distributed real-time control occasions; multi-node network communication: supports multi-node network communication system, and is suitable for intercommunication between modularization of large instrument systems. The GPIO interface (General Purpose Input / Output) is a general input / output port, which is a common interface type in digital electronic systems, used for communication and control with external devices. GPIO can provide digital input and output functions through pins, and users can control its output and input through software. GPIO pins can be configured as input mode or output mode. Input mode is used to read external device electrical signals, and output mode is used to control external device state. In embedded systems, GPIO is a very important basic hardware resource, usually acting as a bridge between chip pins and external circuits. Through GPIO, internal signals or data can be connected and interacted with external devices or sensors. Common application scenarios include controlling LED lights, reading key states, connecting sensors, etc. The working principle of GPIO involves multiple modes and register configuration. Input mode can read high or low level state, and output mode can set pin to high or low level. In order to configure and control the function of GPIO pin, it is usually necessary to write specific control registers to set the mode, state and level of the pin. The I2C communication interface (Inter-Integrated Circuit) is a serial communication bus standard, mainly used for communication between microcontrollers and peripheral devices, belonging to a master-slave bus structure, that is, one master device can communicate with multiple slave devices.The I2C bus uses two signal lines: serial clock line (SCL) and serial data line (SDA), through which data transmission and reception are carried out. I2C is a serial communication protocol that only requires two lines for data transmission, namely the data line SDA and the clock line SCL. The data line is used to send data, and the clock line is controlled by the master device to determine the data transmission rate. The I2C bus allows multiple master devices to exist and determines which device has the right to use the bus through an arbitration mechanism. Each device connected to the I2C bus has a unique address to facilitate the master device to visit and communicate. I2C bus was initially used for audio and video devices, but now it has been widely applied in various electronic devices, including server management, communication of individual component status, etc. Due to its simple structure, small space occupation, high transmission rate, etc., I2C bus is very popular in embedded systems and consumer electronics.

[0027] The acquisition unit (AFE) includes a basic protection logic unit, a power management module, a voltage measurement module, a temperature measurement module, a current measurement module, a MOSFET driving module, a communication interface module, and a load detection module. The basic protection logic unit is used to control the protection function of the starting power supply. The voltage measurement module is used to manage the starting power supply. The voltage measurement module is used to monitor the voltage of the starting power supply and to realize the balanced driving of the starting power supply. The temperature measurement module is used to measure the temperature of the starting power supply. The current measurement module is used to monitor the current of the starting power supply. The MOSFET driving module is used to drive the power switch (MOSFET). The communication interface module is used to realize bidirectional communication with the MCU module. The load detection module is used to detect the access load and to realize the charging detection.

[0028] The voltage unit (Buck DC / DC) is a DC-DC converter that is mainly used to convert the input DC voltage to a lower output voltage. The Buck circuit is based on the inductive energy storage principle, and by controlling the input duty cycle variable PWM wave to switch the on and off state of the switch tube, the voltage conversion is realized. The working principle of the Buck circuit can be divided into the following stages: on stage: when the switch tube is turned on, the inductor stores energy, and the capacitor charges; off stage: when the switch tube is turned off, the energy between the inductor and the capacitor is transferred to the load, at this time the current in the inductor still exists, continues to flow to the load, free wheel oscillation stage: after the inductor current flows to the load, the switch tube is turned off, the current in the inductor cannot disappear immediately, so the energy in the inductor will be transferred back to the switch tube, driving the diode to conduct, and the above three stages are repeated: through the PWM controller to adjust the duty cycle of the switch tube conduction, so as to realize the stable adjustment of the output voltage.

[0029] The bypass current limiting circuit includes bypass current limiting topology circuit one or bypass current limiting topology circuit two, i.e. bypass current limiting topology circuit one and bypass current limiting topology circuit two can realize the bypass current limiting function required by the embodiment, wherein, the bypass current limiting topology circuit one includes a diode DS1, a diode DS2, an inductor LS1, a MOS tube QS1, a MOS tube QS2, a MOS tube QS3 and a MOS tube QS4. Figure 2 The circuit structure diagram of the bypass current limiting topology one is shown in the figure, wherein Figure 3 The circuit structure diagram of the bypass current limiting topology two is shown in the figure, wherein Figure 2 The bypass current limiting topology circuit one includes a diode DS1, a diode DS2, an inductor LS1, a MOS tube QS1, a MOS tube QS2, a MOS tube QS3 and a MOS tube QS4, wherein the positive pole of the diode DS1 is connected with the QS2 and the LS1 respectively, the negative pole of the diode DS1 is connected with the positive pole of the starting power supply, the positive pole of the DS2 is connected with the inductor LS1 and the QS1 respectively, the input stage of the MOS tube QS1 is connected with the diode DS2 and the inductor LS1 respectively, the output stage of the MOS tube QS1 is connected with the negative pole of the starting power supply and the MOS tube QS4 through a current sensor, the G pole of the MOS tube QS2 is connected with a pulse controller (PWM), the input stage of the MOS tube QS2 is connected with the diode DS1 and the inductor LS1 respectively, the output stage of the MOS tube QS2 is connected with the negative pole of the starting power supply through a current sensor, the G pole of the MOS tube QS2 is connected with a pulse controller (PWM), the input stage of the MOS tube QS3 is connected with the negative pole of the starting power supply and connected with the MOS tube QS2 through a current sensor, the output stage of the MOS tube QS3 is connected with the MOS tube QS4, the input stage of the MOS tube QS4 is connected with the negative pole of the starting power supply and connected with the MOS tube QS1 through a current sensor, and the output stage of the MOS tube QS4 is connected with the MOS tube QS3.

[0030] The bypass current limiting topology circuit two includes a diode DS1, a diode DS2, an inductor LS1, a MOS tube QS1, a MOS tube QS2, a MOS tube QS3 and a MOS tube QS4, wherein the positive pole of the diode DS1 is connected with the QS2 and the LS1 respectively, the negative pole of the diode DS1 is connected with the positive pole of the starting power supply, the positive pole of the DS2 is connected with the inductor LS1 and the QS1 respectively, the input stage of the MOS tube QS1 is connected with the diode DS2 and the inductor LS1 respectively, the output stage of the MOS tube QS1 is connected with the negative pole of the starting power supply and the MOS tube QS4 through a current sensor, the G pole of the MOS tube QS2 is connected with a pulse controller (PWM), the input stage of the MOS tube QS2 is connected with the diode DS1 and the inductor LS1 respectively, the output stage of the MOS tube QS2 is connected with the negative pole of the starting power supply through a current sensor, the G pole of the MOS tube QS2 is connected with a pulse controller (PWM), the input stage of the MOS tube QS3 is connected with the negative pole of the starting power supply and connected with the MOS tube QS2 through a current sensor, the output stage of the MOS tube QS3 is connected with the MOS tube QS4, the input stage of the MOS tube QS4 is connected with the negative pole of the starting power supply and connected with the MOS tube QS1 through a current sensor, and the output stage of the MOS tube QS4 is connected with the MOS tube QS3. Figure 3As shown, the bypass current limiting topology circuit two includes diode DS3, diode DS4, diode DS5, diode DS6, inductor LS2, inductor LS3, MOS tube QS5, MOS tube QS6, MOS tube QS7, MOS tube QS8; wherein the positive pole of the diode DS3 is connected with the QS6 and the LS3 respectively, the negative pole of the diode DS1 is connected with the positive pole of the starting power supply, the positive pole of the diode DS4 is connected with the QS5 and the LS2 respectively, the negative pole of the diode DS1 is connected with the positive pole of the starting power supply, the positive pole of the diode DS5 is connected with the negative pole of the starting power supply, the negative pole of the diode DS5 is connected with the diode DS4 and the MOS tube QS5 through the inductor LS2 respectively, the positive pole of the diode DS6 is connected with the negative pole of the starting power supply, the negative pole of the diode DS5 is connected with the diode DS3 and the MOS tube QS6 through the inductor LS3 respectively, the output stage of the MOS tube QS1 is connected with the negative pole of the starting power supply through a current sensor, the G pole of the MOS tube QS6 is connected with a pulse controller (PWM), the input stage of the MOS tube QS6 is connected with the diode DS3 and the inductor LS3 respectively, the output stage of the MOS tube QS6 is connected with the negative pole of the starting power supply through a current sensor, the G pole of the MOS tube QS6 is connected with a pulse controller (PWM); the input stage of the MOS tube QS5 is connected with the inductor LS2 and the diode DS4, the output stage of the MOS tube QS5 is connected with the negative pole of the starting power supply through a current sensor, the G pole of the MOS tube QS5 is connected with a pulse controller (PWM); the input stage of the MOS tube QS7 is connected with the negative pole of the starting power supply and connected with the MOS tube QS6 through a current sensor, the output stage of the MOS tube QS7 is connected with the MOS tube QS8, the input stage of the MOS tube QS8 is connected with the negative pole of the starting power supply and connected with the MOS tube QS5 through a current sensor, the output stage of the MOS tube QS8 is connected with the MOS tube QS7;

[0031] Thus, the bypass current limiting circuit is composed of an inductive switching constant current circuit (bypass current limiting topology), the inductance is charged by a switch pair, the current of the MOS tube is detected and fed back to the MOS tube control to realize the size control of the current, at the same time, the diode (DS1 and DS2 of topology one, DS3 and DS4 of topology two) can limit the reverse discharge of the inductive switching loop, when the constant current discharges, there is a voltage between BV, and BV- is higher than PV-, at this time, QS1 (QS1 of topology one, QS5 of topology two) is always open, QS2 (QS2 of topology one, QS6 of topology two) is a chopping switch, the output current is limited by detecting the switch current of QS2 (QS2 of topology one, QS6 of topology two) and controlling the duty cycle of QS2 (QS2 of topology one, QS6 of topology two); when the constant current charges, there is a voltage between BV, and BV- is lower than PV-, at this time, QS2 (QS2 of topology one, QS6 of topology two) is always open, QS1 (QS1 of topology one, QS5 of topology two) is a chopping switch, the output current is limited by detecting the switch current of QS1 (QS1 of topology one, QS5 of topology two) and controlling the duty cycle of QS1 (QS1 of topology one, QS5 of topology two), thereby realizing the uninterrupted power protection of the starting power supply.

[0032] Embodiment two, the embodiment also includes a protection method of the uninterrupted starting power supply protection circuit, the method adopts the uninterrupted starting power supply protection circuit of embodiment one.

[0033] Embodiment three, the embodiment includes an electronic device, including a processor and a memory, the memory stores a program or instruction executable on the processor, the program or instruction is executed by the processor to realize each step of the protection method of the uninterrupted starting power supply protection circuit of embodiment two, and the same technical effect can be achieved.

[0034] Embodiment four, the embodiment includes a computer readable storage medium, the computer readable storage medium stores a data processing program, the data processing program is executed by the processor to realize each step of the protection method of the uninterrupted starting power supply protection circuit of embodiment two.

[0035] Those skilled in the art will understand that the embodiments described herein can be provided as methods, apparatus (devices), or computer program products. Therefore, this document may take the form of a completely hardware embodiment, a completely software embodiment, or an embodiment combining software and hardware aspects. This includes, but is not limited to, RAM, ROM, EEPROM, flash memory or other memory technologies, CD-ROM, digital versatile disc (DVD) or other optical disc storage, magnetic cartridges, magnetic tape, disk storage or other magnetic storage devices, or any other medium that can be used to store desired information and is accessible by a computer. Furthermore, it is well known to those skilled in the art that communication media typically contain computer-readable instructions, data structures, program modules, or other data in modulated data signals such as carrier waves or other transmission mechanisms, and may include any information delivery medium.

[0036] This document is described with reference to flowchart illustrations and / or block diagrams of methods, apparatus (devices), and computer program products according to embodiments herein. It will be understood that each block of the flowchart illustrations and / or block diagrams, and combinations of blocks in the flowchart illustrations and / or block diagrams, can be implemented by computer program instructions. These computer program instructions can be provided to a processor of a general-purpose computer, special-purpose computer, embedded processor, or other programmable data processing apparatus to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing apparatus, generate instructions for implementing the flowchart illustrations. Figure 1 One or more processes and / or boxes Figure 1 A device that provides the functions specified in one or more boxes.

[0037] These computer program instructions may also be stored in a computer-readable storage medium that can direct a computer or other programmable data processing device to function in a particular manner, such that the instructions stored in the computer-readable storage medium produce an article of manufacture including instruction means, which are implemented in a process Figure 1 One or more processes and / or boxes Figure 1 The steps of the function specified in one or more boxes.

[0038] The above-described embodiments and / or implementations are merely intended for describing the preferred embodiments and / or implementations of the present technology and are not intended to limit the present technology in any form, and any person skilled in the art can make some changes or modifications to other equivalent embodiments without departing from the scope of the technology disclosed in the present disclosure, and such changes or modifications should be considered as substantially the same technology or embodiments. Note that the above is only the preferred embodiment of the present application and the technical principles used. Those skilled in the art will understand that the present application is not limited to the specific embodiments described herein, and various obvious changes, reconfigurations, and substitutions can be made without departing from the scope of the present application. Therefore, although the present application has been described in detail through the above embodiments, the present application is not limited to the above embodiments, and can include more other equivalent embodiments without departing from the concept of the present application, and the scope of the present application is determined by the scope of the appended claims.

Claims

1. A startup power supply protection circuit that does not require power outages, the protection circuit being used in an automotive BMS system, characterized in that, Specifically, this includes: bypass The current limiting unit includes a bypass current limiting power supply comprising either a bypass current limiting topology circuit one or a bypass current limiting topology circuit two. The bypass current limiting topology circuit one includes diodes DS1 and DS2, inductor LS1, MOSFETs QS1, QS2, QS3, and QS4. The anode of diode DS1 is connected to both QS2 and LS1, and the cathode of diode DS1 is connected to the anode of the starting power supply. The anode of DS2 is connected to both inductor LS1 and QS1. The input stage of MOSFET QS1 is connected to both diode DS2 and inductor LS1. The output stage of MOSFET QS1 is connected to the starting power supply via a current sensor. The negative terminal of the power supply is connected to the MOSFET QS4. The gate (G) of the MOSFET QS2 is connected to the pulse controller. The input stage of the MOSFET QS2 is connected to the diode DS1 and the inductor LS1. The output stage of the MOSFET QS2 is connected to the negative terminal of the startup power supply via a current sensor. The gate (G) of the MOSFET QS2 is connected to the pulse controller. The input stage of the MOSFET QS3 is connected to the negative terminal of the startup power supply and is connected to the MOSFET QS2 via a current sensor. The output stage of the MOSFET QS3 is connected to the MOSFET QS4. The input stage of the MOSFET QS4 is connected to the negative terminal of the startup power supply and is connected to the MOSFET QS1 via a current sensor. The output stage of MOSFET QS4 is connected to MOSFET QS3; the bypass current limiting topology circuit two includes diodes DS3, DS4, DS5, DS6, inductor LS2, inductor LS3, MOSFETs QS5, QS6, QS7, and QS8; wherein, the anode of diode DS3 is connected to both QS6 and LS3, the cathode of diode DS1 is connected to the anode of the startup power supply, the anode of diode DS4 is connected to both QS5 and LS2, the cathode of diode DS1 is connected to the anode of the startup power supply, and the anode of diode DS5 is connected to the cathode of the startup power supply. The negative terminal of diode DS5 is connected to diode DS4 and MOSFET QS5 via inductor LS2. The positive terminal of diode DS6 is connected to the negative terminal of the startup power supply. The negative terminal of diode DS5 is connected to diode DS3 and MOSFET QS6 via inductor LS3. The output stage of MOSFET QS1 is connected to the negative terminal of the startup power supply via a current sensor. The gate (G) of MOSFET QS6 is connected to a pulse controller. The input stage of MOSFET QS6 is connected to diode DS3 and inductor LS3. The output stage of MOSFET QS6 is connected to the negative terminal of the startup power supply via a current sensor. The gate (G) of MOSFET QS6 is connected to a pulse controller.The input stage of MOSFET QS5 is connected to inductor LS2 and diode DS4. The output stage of MOSFET QS5 is connected to the negative terminal of the startup power supply via a current sensor. The gate (G) terminal of MOSFET QS5 is connected to the pulse controller. The input stage of MOSFET QS7 is connected to the negative terminal of the startup power supply and is connected to MOSFET QS6 via a current sensor. The output stage of MOSFET QS7 is connected to MOSFET QS8. The input stage of MOSFET QS8 is connected to the negative terminal of the startup power supply and is connected to MOSFET QS5 via a current sensor. The output stage of MOSFET QS8 is connected to MOSFET QS7. The BMS system includes: a main control unit, a data acquisition unit, a voltage unit, a power switch, and a bypass current limiting unit; wherein, the main control unit is connected to the data acquisition unit and the voltage unit, the data acquisition unit is connected to the power switch, the voltage unit, and the main control unit, the voltage unit is connected to the data acquisition unit and the main control unit, and the power switch is connected to the data acquisition unit and the bypass current limiting unit.

2. The uninterrupted power supply protection circuit for startup as described in claim 1, characterized in that, The main control unit includes: a CAN module, a GPIO interface, and an I2C communication interface.

3. The uninterrupted power supply protection circuit for startup according to claim 2, characterized in that, The acquisition unit includes: a basic protection logic unit, a power management module, a voltage measurement module, a temperature measurement module, a current measurement module, a MOSFET drive module, a communication interface module, and a load detection module.

4. The uninterrupted power supply protection circuit for startup as described in claim 3, characterized in that, The basic protection logic unit is used to control the protection function of the startup power supply. The voltage measurement module is used to implement the power management module for managing the startup power supply. The voltage measurement module is used to monitor the voltage of the startup power supply and to achieve balanced drive of the startup power supply. The temperature measurement module is used to measure the temperature of the startup power supply. The current measurement module is used to monitor the current of the startup power supply. The MOSFET drive module is used to drive the power switch. The communication interface module is used to achieve bidirectional communication with the main control unit. The load detection module is used to detect the connected load and to detect charging.

5. A protection method for an uninterrupted power supply protection circuit, characterized in that, The method employs the uninterrupted power supply protection circuit described in any one of claims 1-4 to achieve uninterrupted power supply protection for the starting power supply.

6. An electronic device, characterized in that, It includes a processor and a memory, wherein the memory stores a program or instructions that can run on the processor, and when the program or instructions are executed by the processor, they implement the protection method of the uninterrupted startup power supply protection circuit as described in claim 5.

7. A computer-readable storage medium, characterized in that, A data processing program is stored on a computer-readable storage medium, and the data processing program is executed by a processor to provide the protection method of the uninterrupted startup power supply protection circuit as described in claim 5.

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