Power supply circuit, electronic equipment and vehicle

Abstract

The utility model discloses a power supply circuit, an electronic device and a vehicle. The power supply circuit comprises a power supply module, a power supply management module, a detection resistor module, a power utilization module and a current detection module. The first voltage detection end and the second voltage detection end of the power supply module are connected with the detection resistor, and the power supply management module can obtain the power supply current information of the power utilization module through the voltage information between the input end and the output end of the detection resistor module obtained by the power supply module, so that the internal protection of the power supply module can be realized; the power supply circuit can switch off own power supply output, can accurately monitor the current supply condition of the power utilization module, and prevents potential problems caused by overcurrent or undercurrent, so that the safety of the whole power supply circuit can be improved, risks such as equipment damage or fire hazards caused by abnormal current are reduced, and the power supply circuit can be applied to electronic equipment and vehicles. The method has the advantage of high safety.

Description

Technical Field

[0001] This utility model relates to the field of power management technology, and in particular to a power supply circuit that can be applied to electronic devices and vehicles. Background Technology

[0002] A power supply circuit is a circuit used to provide electrical energy to other devices. The working principle of a power supply circuit is based on the relationship between current and voltage. According to Ohm's law, current (I) is equal to the ratio between voltage (U) and resistance (R), i.e., I = U / R. In a closed circuit, when a power source is connected, the electromotive force (voltage) drives free charges to move in the conductors, forming a current. The power source provides voltage to drive the current flow, thus completing the transmission and conversion of electrical energy. Power supply circuits provide the necessary electrical energy to various electronic devices and appliances. For example, SOC (System on Chip) and other power modules require electrical energy to function properly. Power supply circuits meet their operational needs by transferring electrical energy to these devices, playing a vital role in modern life and production.

[0003] When powering various electronic devices, it's crucial not only to ensure their normal operation but also to guarantee a stable and reliable power supply for all devices and systems. To this end, the power supply circuits of different electronic devices are equipped with power supply current detection modules. This ensures the normal operation and safety of the circuit. By detecting the current, the power supply current detection module can monitor the circuit's operating status in real time and determine if there are any abnormalities such as overloads or short circuits. In case of abnormal current, it can promptly disconnect the circuit to protect the components from damage. Furthermore, by monitoring the current, the circuit's energy efficiency can be optimized, reducing energy waste.

[0004] In existing technologies, taking SOC power supply as an example, the power supply current detection of power-consuming modules such as the SOC can only be achieved through the power management module. If the power is turned off, the power supply current detection of power-consuming modules such as the SOC cannot be achieved. When an overcurrent event occurs at the SOC, such as a short circuit, the power supply current of the power-consuming module cannot be detected, posing a safety risk.

[0005] Therefore, the power supply circuits in the existing technology have the problem of low safety. Utility Model Content

[0006] The purpose of this invention is to solve the problem of low safety in the power supply circuit of the prior art.

[0007] To address the aforementioned problems, this utility model provides a power supply circuit, comprising a power supply module, a power management module, a detection resistor module, a power consumption module, and a current detection module. The current output terminal of the power supply module is connected to the power consumption module via the detection resistor module to supply power to the power consumption module. The power supply module is also connected to the input and output terminals of the detection resistor module via a first voltage detection terminal and a second voltage detection terminal, respectively, to obtain voltage information between the input and output terminals of the detection resistor module. The power management module is connected to the power supply module to obtain the voltage information between the input and output terminals of the detection resistor module, and based on this voltage information, obtains the power supply current information for the power consumption module and manages the operating state of the power supply module accordingly. The current detection module is connected to both the input and output terminals of the detection resistor module to obtain the voltage information between them, and based on this voltage information, obtains the power supply current information for the power consumption module.

[0008] By adopting the above technical solution, a detection resistor is connected to the first and second voltage detection terminals of the power module. The power management module can obtain the power supply current information of the power-consuming module through the voltage information between the input and output terminals of the detection resistor module obtained by the power module, and use this power supply current information to manage the working status of the power module. Furthermore, the current detection module can also obtain the voltage information between the input and output terminals of the detection resistor module and obtain the power supply current information of the power-consuming module based on the voltage information. Through the coordinated work of the detection resistor module, the first and second voltage detection terminals of the power module, and the current detection module, when an overcurrent event occurs in the power-consuming module, such as a short circuit exceeding the maximum current capacity of the power module, not only can the power module internally protect itself by shutting down its power output, but it can also accurately monitor the current supply status of the power-consuming module, optimize power usage efficiency, prevent potential problems caused by overcurrent or undercurrent, and thus extend the service life of the equipment. This real-time monitoring capability improves the safety of the entire power supply circuit and reduces the risk of equipment damage or fire caused by abnormal current.

[0009] Therefore, the power supply circuit provided by this utility model has the advantage of high safety.

[0010] According to the power supply circuit provided by this utility model, the current detection module includes a current sensing amplifier and an information processing unit; the positive input terminal of the current sensing amplifier is connected to the input terminal of the sensing resistor module, and the negative input terminal of the current sensing amplifier is connected to the output terminal of the sensing resistor module to obtain the voltage information between the input and output terminals of the sensing resistor module; the output terminal of the current sensing amplifier is connected to the information processing unit to send the voltage amplification information corresponding to the voltage information to the information processing unit; the information processing unit obtains the power supply current information of the power consumption module based on the voltage amplification information.

[0011] Using the above technical solution, the current detection module includes a current sensing amplifier. By connecting the input and output terminals of the sensing resistor module, the current sensing amplifier can accurately measure the voltage difference across the sensing resistor. Since there is a fixed relationship between current and voltage (Ohm's Law), the magnitude of the current can be indirectly obtained by measuring the voltage. The current sensing amplifier amplifies the voltage signal, thereby improving the accuracy of the measurement. After receiving the amplified voltage signal output from the current sensing amplifier, the information processing unit processes it through internal algorithms to calculate a high-precision current value, which helps to accurately monitor the power supply status of the power-consuming module.

[0012] According to the power supply circuit provided by this utility model, the information processing unit includes an analog-to-digital converter and a current calculation unit; the output terminal of the current sensing amplifier is connected to the input terminal of the analog-to-digital converter to send the voltage amplification information to the analog-to-digital converter; the analog-to-digital converter performs analog-to-digital conversion processing on the voltage amplification information to obtain the corresponding voltage value, and the output terminal of the analog-to-digital converter is connected to the current calculation unit to send the voltage value to the current calculation unit; the current calculation unit calculates the power supply current information of the power consumption module based on the voltage value.

[0013] Using the above technical solution, the analog-to-digital converter (ADC) can convert the analog voltage signal output by the current sensing amplifier into a digital signal. The conversion accuracy directly affects the accuracy of current detection. A high-resolution ADC can capture more subtle voltage changes, thus reflecting current changes more accurately. Based on the digital voltage value output by the ADC, the current calculation unit can calculate a more precise supply current using a preset algorithm or formula, which helps to achieve more refined power supply monitoring.

[0014] According to the power supply circuit provided by this utility model, the detection resistor module includes a detection resistor. The input terminal of the detection resistor is connected to the first voltage detection terminal of the power supply module, and the output terminal of the detection resistor is connected to the second voltage detection terminal of the power supply module and the power supply terminal of the power consumption module, respectively.

[0015] Using the above technical solution, a sensing resistor is connected in series between the power supply module and the power consumption module, allowing real-time monitoring of the current flowing through the power consumption module. When current flows through the sensing resistor, a voltage drop is generated across it. This voltage drop is proportional to the current, and the magnitude of the current can be calculated by measuring this voltage drop. By monitoring the voltage drop across the sensing resistor, abnormal current conditions, such as overcurrent, can be detected promptly. When the current exceeds a preset threshold, a protection mechanism can be triggered to cut off the power supply or adjust the power supply parameters to prevent equipment damage or safety accidents.

[0016] In addition, sensing resistors can also be used to detect faults such as short circuits and open circuits in circuits. When a fault occurs in a circuit, the current may change abnormally, and these faults can be detected in time by monitoring the voltage drop across the sensing resistor.

[0017] According to the power supply circuit provided by this utility model, the power supply circuit also includes a circuit protection module. The first end of the circuit protection module is connected to the current output end of the power supply module, and the second end of the circuit protection module is connected to the input end of the detection resistor.

[0018] Using the above technical solution, the circuit protection module can monitor the current passing through the detection resistor in real time, ensuring that the power supply circuit and its connected equipment operate within a safe range. Once the current exceeds the preset safety threshold, the protection module will respond quickly and take measures such as cutting off the power supply or adjusting the output current, thereby reducing the risk of faults or accidents caused by abnormal current.

[0019] According to the power supply circuit provided by this utility model, the circuit protection module includes an inductor, the first end of which is connected to the current output terminal of the power supply module, and the second end of which is connected to the input terminal of the detection resistor.

[0020] Using the above technical solution, the inductor plays a role in smoothing the DC current in the power supply circuit. When the power module outputs DC current, the inductor can store and release energy, thereby reducing fluctuations and ripples in the current and making the current more stable. For example, when the current increases abnormally, the inductor will generate a large back electromotive force, thus limiting further increases in current. Furthermore, the inductor, in conjunction with the sensing resistor, can form a simple filter circuit. When AC components attempt to pass through the inductor, they are impeded due to the inductive reactance of the inductor, while DC components can pass smoothly. Therefore, the inductor helps filter out high-frequency noise and interference in the current.

[0021] According to the power supply circuit provided by this utility model, the power supply module includes a DC-to-DC power supply chip, the power management module is a microcontroller unit, the current detection module is a microcontroller unit, and the power consumption module is a system-on-a-chip.

[0022] According to the power supply circuit provided by this utility model, the system-on-a-chip is the system-on-a-chip in the vehicle domain controller.

[0023] This utility model also provides an electronic device, including a power supply circuit with the above-described structure.

[0024] By adopting the above technical solution, the electronic device uses a power supply circuit with the above structure. Because this power supply circuit, through the coordinated operation of the detection resistor module, the first and second voltage detection terminals of the power module, and the current detection module, can not only protect the power module internally by shutting off its power output when an overcurrent event occurs in the power module (e.g., a short circuit occurs and the current exceeds the maximum current capacity of the power module), but also accurately monitor the current supply status of the power module, optimizing the power consumption efficiency of the electronic device, preventing potential problems caused by overcurrent or undercurrent, and thus extending the service life of the electronic device. This real-time monitoring capability improves the overall safety of the electronic device and reduces the risk of damage or fire caused by abnormal current.

[0025] This utility model also provides a vehicle including a power supply circuit with the above-described structure.

[0026] By adopting the above technical solution, the vehicle uses a power supply circuit with the above structure. Because this power supply circuit, through the coordinated operation of the detection resistor module, the first and second voltage detection terminals of the power module, and the current detection module, can not only protect the power module internally by shutting off its power output when an overcurrent event occurs in the vehicle's electrical modules (such as a short circuit exceeding the maximum current capacity of the power module), but also accurately monitor the current supply status of the electrical modules, optimizing the vehicle's power usage efficiency and preventing potential problems caused by overcurrent or undercurrent, thereby extending the vehicle's service life. This real-time monitoring capability improves the overall safety of the vehicle and reduces the risk of vehicle damage or fire caused by abnormal current.

[0027] The beneficial effects of this utility model are as follows:

[0028] This utility model provides a power supply circuit, electronic device, and vehicle. The power supply circuit includes a power module, a power management module, a detection resistor module, a power consumption module, and a current detection module. The detection resistor is connected to the first and second voltage detection terminals of the power module. The power management module can obtain the power supply current information of the power consumption module by obtaining the voltage information between the input and output terminals of the detection resistor module obtained by the power module, and use the power supply current information to manage the working state of the power module. The current detection module can also obtain the voltage information between the input and output terminals of the detection resistor module, and obtain the power supply current information of the power consumption module based on the voltage information. By coordinating the detection of the resistor module, the first and second voltage detection terminals of the power supply module, and the current detection module, when an overcurrent event occurs in the power supply module, such as a short circuit in the power supply module causing the current to exceed the maximum current capacity of the power supply module, it can not only protect the power supply module internally by shutting off its own power output, but also accurately monitor the current supply status of the power supply module, preventing potential problems caused by overcurrent or undercurrent. This improves the safety of the entire power supply circuit and reduces the risk of equipment damage or fire caused by abnormal current. When applied to electronic equipment and vehicles, it has the advantage of high safety. Attached Figure Description

[0029] Figure 1 A schematic diagram of the power supply circuit provided in an embodiment of this utility model.

[0030] Explanation of reference numerals in the attached figures:

[0031] 100. Power supply module; 200. Power management module; 300. Detection resistor module; 400. Power consumption module;

[0032] 500. Current detection module; 600. Circuit protection module. Detailed Implementation

[0033] Power supply circuits are widely used in various electronic devices and systems. For example, in industrial automation control and the electrical industry, they provide a stable and reliable power supply to various industrial equipment, including motors, sensors, and controllers, which require precise voltage and current to ensure normal operation. In power systems, power supply circuits are used in technologies such as high-voltage direct current transmission and flexible alternating current transmission. In automotive battery management systems and motor controllers, power supply circuits need to efficiently and reliably convert and distribute power to ensure the vehicle's range and performance. In various fields, power supply circuits need to meet different power demands and environmental conditions to ensure the normal operation of equipment and the stability of the system.

[0034] Taking automobiles as an example, a stable power supply is particularly important for the electronic control units (ECUs) in modern vehicles. These ECUs rely on stable voltage to precisely control various systems, such as fuel injection and valve timing. The power supply circuit provides power to the vehicle's lighting systems (headlights, turn signals, interior lights, etc.), audio systems, power windows, windshield wipers, and other equipment, ensuring their normal operation and providing a comfortable, convenient, and safe riding environment for the driver and passengers. In electric vehicles, the power supply circuit is even more complex and crucial. It not only provides power to key components such as the electric motor and battery management system but also ensures efficient power conversion and distribution to meet the high-performance requirements of electric vehicles. Therefore, the power supply circuit plays a vital role in automobiles, ensuring not only the vehicle's starting and operation but also its performance and functionality.

[0035] In some existing power supply circuits, taking SOC power supply as an example, the power supply current detection of modules such as the SOC can only be achieved through the power management module. If the power is turned off, the power supply current detection of modules such as the SOC cannot be achieved. When an overcurrent event occurs at the SOC, such as a short circuit, the power supply current of the modules cannot be detected, resulting in low safety issues.

[0036] To address the aforementioned problems, this utility model provides a power supply circuit, comprising a power supply module, a power management module, a detection resistor module, a power consumption module, and a current detection module. The detection resistor is connected to a first and second voltage detection terminal of the power supply module. The power management module can obtain the power supply current information of the power consumption module by using the voltage information between the input and output terminals of the detection resistor module obtained from the power supply module, and manage the operating state of the power supply module using this power supply current information. Furthermore, the current detection module can also obtain the voltage information between the input and output terminals of the detection resistor module, and obtain the power supply current information of the power consumption module based on the voltage information. By coordinating the detection of the resistor module, the first and second voltage detection terminals of the power supply module, and the current detection module, when an overcurrent event occurs in the power module, such as a short circuit in the power module causing the current to exceed the maximum current capacity of the power supply module, not only can the power supply module be internally protected and its own power output be shut off, but the current supply status of the power module can also be accurately monitored. This enables closed-loop control and management of the power supply current of the power module, preventing potential problems caused by overcurrent or undercurrent, thereby improving the safety of the entire power supply circuit and reducing the risk of equipment damage or fire caused by abnormal current.

[0037] To more clearly illustrate the power supply circuit provided by this utility model, the following description is provided in conjunction with the accompanying drawings.

[0038] Please see Figure 1The power supply circuit provided by this utility model includes a power supply module 100, a power management module 200, a detection resistor module 300, a power consumption module 400, and a current detection module 500. The current output terminal of the power supply module 100 is connected to the power consumption module 400 through the detection resistor module 300 to supply power to the power consumption module 400. The power supply module 100 is also connected to the input and output terminals of the detection resistor module 300 through a first voltage detection terminal and a second voltage detection terminal, respectively, to obtain voltage information between the input and output terminals of the detection resistor module 300. The management module 200 is connected to the power supply module 100 to obtain the voltage information between the input and output terminals of the detection resistor module 300 obtained by the power supply module 100, and obtains the power supply current information of the power consumption module 400 based on the voltage information, and manages the working state of the power supply module 100 based on the power supply current information; the current detection module 500 is connected to the input and output terminals of the detection resistor module 300 respectively to obtain the voltage information between the input and output terminals of the detection resistor module 300, and obtains the power supply current information of the power consumption module 400 based on the voltage information.

[0039] In use, the power module 100 is connected to the detection resistor module 300 via the first and second voltage detection terminals. The power management module 200 can obtain the power supply current information of the power consumption module 400 by using the voltage information between the input and output terminals of the detection resistor module 300 obtained by the power module 100, and use this power supply current information to manage the working state of the power module 100. The current detection module 500 can also obtain the voltage information between the input and output terminals of the detection resistor module 300, and obtain the power supply current information of the power consumption module 400 based on the voltage information. By coordinating the detection of the resistor module 300, the first and second voltage detection terminals of the power module 100, and the current detection module 500, when an overcurrent event occurs in the power module 400, such as a short circuit in the power module 400 causing the current to exceed the maximum current capacity of the power module 100, not only can the power module 100 be internally protected and its power output shut off, but the current supply status of the power module 400 can also be accurately monitored. This optimizes power usage efficiency, prevents potential problems caused by overcurrent or undercurrent, and extends the service life of the equipment. This real-time monitoring capability improves the safety of the entire power supply circuit and reduces the risk of equipment damage or fire caused by abnormal current.

[0040] It should be understood that, in this utility model, the specific structure of the power module 100, power management module 200, detection resistor module 300, power consumption module 400 and current detection module 500 is not limited.

[0041] In one feasible implementation, the power module 100 may include a DC-to-DC power supply chip, the power management module 200 may be a microcontroller unit, the current detection module 500 may be a microcontroller unit, and the power consumption module 400 may be a system-on-a-chip.

[0042] The detection resistor module 300 can be a small-value resistor connected in series in the circuit. By measuring the voltage drop across the resistor, the magnitude of the current passing through the resistor can be determined. It can be used to monitor and control the current in the circuit, ensuring the safety and efficiency of the system.

[0043] DC-to-DC power supply chips can convert one DC voltage to another to provide a stable power supply for circuits with different voltage requirements. Specifically, they can be isolated or non-isolated, and depending on the design, they can realize functions such as boost, buck or inversion.

[0044] A Microcontroller Unit (MCU), also known as a Single-Chip Microcomputer or a microcontroller, is a highly integrated microcontroller. External devices such as sensors convert physical quantities into electrical signals, which are then input into the MCU. The MCU uses circuits such as A / D converters to convert the analog signals into digital signals for processing. The MCU's CPU performs calculations and processes the input data according to program instructions. The processed data is then converted back into analog signals through circuits such as D / A converters, or used to control the operation of external devices through circuits such as PWM.

[0045] A System-on-Chip (SoC) is a highly integrated chip that integrates key components of a computer or other electronic system onto a single chip. It is a dedicated integrated circuit that contains a complete system and all embedded software. It typically integrates key components such as a microprocessor, analog IP cores, digital IP cores, and memory (or off-chip memory control interfaces) to form a miniature system.

[0046] It should be understood that the application of system-on-a-chip (SoC) is not limited to any particular object. For example, in one embodiment of this utility model, the SoC can be a SoC in a vehicle domain controller.

[0047] The types of vehicle domain controllers are not limited, and can include, for example, powertrain domain controllers, chassis domain controllers, cockpit domain controllers, autonomous driving domain controllers, body domain controllers, etc., and system-on-a-chips can also be system-on-a-chips for the whole vehicle controller.

[0048] Furthermore, the power module 100 can be connected to the vehicle's battery.

[0049] To further understand, the power management module 200 can directly calculate the power supply current information of the power consumption module 400 through voltage information, and the current detection module 500 can calculate the power supply current information of the power consumption module 400 through voltage information. The specific algorithms are executed by the power management module 200 and the current detection module 500 themselves.

[0050] Furthermore, regarding the power supply circuit provided in this utility model, please refer to... Figure 1 The current detection module 500 includes a current sensing amplifier and an information processing unit. The positive input terminal of the current sensing amplifier is connected to the input terminal of the detection resistor module 300, and the negative input terminal of the current sensing amplifier is connected to the output terminal of the detection resistor module 300 to obtain the voltage information between the input and output terminals of the detection resistor module 300. The output terminal of the current sensing amplifier is connected to the information processing unit to send the voltage amplification information corresponding to the voltage information to the information processing unit. The information processing unit obtains the power supply current information of the power consumption module 400 based on the voltage amplification information.

[0051] It's important to understand that the positive input terminal of the current sensing amplifier is connected to the input terminal of the sensing resistor module 300, and the negative input terminal is connected to the output terminal of the sensing resistor module 300. This connection allows the current sensing amplifier to directly obtain the voltage difference generated by the current flowing through the sensing resistor module 300. In use, when current flows through the sensing resistor, according to Ohm's law, a voltage drop proportional to the current magnitude will be generated across the resistor. The current sensing amplifier measures this voltage drop and amplifies it to a level more suitable for subsequent circuit processing. The sensing resistor module 300 is a simple resistor whose resistance value is precisely set to generate a measurable voltage drop at a specific current. By measuring this voltage drop, the magnitude of the current flowing through the resistor can be indirectly measured. The output terminal of the current sensing amplifier is connected to the information processing unit. Thus, the amplified voltage information (i.e., voltage amplification information) can be transmitted to the information processing unit for further processing. The information processing unit receives the voltage amplification information from the current sensing amplifier. Using the known sensing resistor value and amplifier gain, the information processing unit can calculate the original current magnitude. Finally, the information processing unit will output information indicating the 400 kW power supply current of the power module. This information can be a digital signal, an analog signal, or other forms, depending on the system design requirements.

[0052] Based on the above scheme, the current detection module 500 includes a current sensing amplifier. The current sensing amplifier, connected to the input and output terminals of the sensing resistor module 300, can accurately measure the voltage difference across the sensing resistor. Since there is a fixed relationship between current and voltage (Ohm's Law), the magnitude of the current can be indirectly obtained by measuring the voltage. The current sensing amplifier amplifies the voltage signal. For example, if the amplification factor of the current sensing amplifier is A, the output voltage of the current sensing amplifier is Vsense, and the resistance of the sensing resistor is Rsense, then the actual current is Vsense / (Rsense*A).

[0053] This improves the accuracy of the measurement. After receiving the amplified voltage signal output by the current sensing amplifier, the information processing unit can calculate a high-precision current value through internal algorithm processing, which helps to accurately monitor the power supply status of the power module 400.

[0054] Furthermore, the information processing unit includes an analog-to-digital converter (ADC) and a current calculation unit; the output of the current sensing amplifier is connected to the input of the ADC to send the voltage amplification information to the ADC; the ADC performs analog-to-digital conversion on the voltage amplification information to obtain the corresponding voltage value, and the output of the ADC is connected to the current calculation unit to send the voltage value to the current calculation unit; the current calculation unit calculates the power supply current information of the power module 400 based on the voltage value.

[0055] Specifically, in this invention, the information processing unit is a crucial component of the current detection module 500, primarily consisting of two sub-units: an analog-to-digital converter (ADC) and a current calculation unit. The output of the current sensing amplifier is connected to the input of the ADC. Thus, the voltage information amplified by the current sensing amplifier (i.e., voltage amplification information) can be transmitted to the ADC for further processing. The main function of the ADC is to convert continuous analog voltage signals into discrete digital signals. When receiving voltage amplification information from the current sensing amplifier, the ADC samples it and converts it into a corresponding digital voltage value. This digital voltage value represents the actual voltage drop caused by the current flowing through the sensing resistor, providing a basis for subsequent current calculations. The output of the ADC is connected to the current calculation unit. The digital voltage value obtained after the ADC conversion can then be transmitted to the current calculation unit for further processing. The current calculation unit receives the digital voltage value from the ADC and, using the known resistance value of the sensing resistor and the gain of the ADC, can calculate an accurate current value. Finally, the current calculation unit will output a digital information representing the 400 kW power supply current of the power module.

[0056] Based on the above scheme, the information processing unit, by combining an analog-to-digital converter (ADC) and a current calculation unit, can accurately measure and calculate the current in the circuit. The ADC converts analog voltage signals into digital signals, providing the basic data for current calculation. The current calculation unit then uses this data and known resistance values ​​to calculate the original current magnitude. This facilitates more precise power supply monitoring.

[0057] Further, please see Figure 1 The detection resistor module 300 includes a detection resistor. The input terminal of the detection resistor is connected to the first voltage detection terminal of the power supply module 100, and the output terminal of the detection resistor is connected to the second voltage detection terminal of the power supply module 100 and the power supply terminal of the power consumption module 400, respectively.

[0058] Specifically, the sensing resistor is a resistor with a specific resistance value, designed to generate a measurable voltage drop when current flows through it. This voltage drop is proportional to the current flowing through the resistor, and therefore can be used to indirectly measure the current magnitude. The input terminal of the sensing resistor is connected to the first voltage detection terminal of the power module 100, allowing the power module 100 to supply current to the sensing resistor through this connection point and simultaneously monitor the magnitude of this current. The output terminal of the sensing resistor is connected to the second voltage detection terminal of the power module 100, allowing the power module 100 to measure the voltage drop across the sensing resistor and thus calculate the current flowing through it. Simultaneously, the output terminal of the sensing resistor is also connected to the power supply terminal of the power consumption module 400. Thus, the current flowing through the sensing resistor is actually the current supplied to the power consumption module 400; by measuring this current, the microcontroller can understand the power supply status of the power consumption module 400.

[0059] Based on the above scheme, a detection resistor is connected in series between the power supply module 100 and the power consumption module 400 to monitor the current flowing through the power consumption module 400 in real time. When current flows through the detection resistor, a certain voltage drop is generated across it. This voltage drop is proportional to the current, and the magnitude of the current can be calculated by measuring this voltage drop. By monitoring the voltage drop across the detection resistor, abnormal current conditions, such as overcurrent, can be detected in a timely manner. When the current exceeds a preset threshold, a protection mechanism can be triggered to cut off the power supply or adjust the power supply parameters to prevent equipment damage or safety accidents.

[0060] In addition, sensing resistors can also be used to detect faults such as short circuits and open circuits in circuits. When a fault occurs in a circuit, the current may change abnormally, and these faults can be detected in time by monitoring the voltage drop across the sensing resistor.

[0061] Furthermore, in the power supply circuit provided by this utility model, please refer to... Figure 1The power supply circuit also includes a circuit protection module 600. The first end of the circuit protection module 600 is connected to the current output end of the power supply module 100, and the second end of the circuit protection module 600 is connected to the input end of the detection resistor.

[0062] Specifically, the circuit protection module 600 is designed to ensure the safe operation of the circuit under abnormal conditions, preventing problems such as excessive current, excessive voltage, or short circuits that could lead to circuit damage or safety accidents. The circuit protection module 600 is a component designed to protect the circuit from various faults. It can monitor the circuit's operating status based on preset conditions (such as current and voltage thresholds) and take appropriate protective measures when abnormal conditions are detected. The first terminal of the circuit protection module 600 is connected to the current output terminal of the power supply module 100, enabling the circuit protection module 600 to monitor the current flowing through the sensing resistor, which is the current supplied to the power consumption module 400. If the current exceeds the preset safety threshold, the circuit protection module 600 can take corresponding protective measures.

[0063] When in use, the circuit protection module 600 can monitor the current flowing through it and automatically cut off the circuit or reduce the current when the current exceeds a preset threshold to prevent safety problems such as overheating, damage or fire. If a short circuit occurs in the circuit, the current will increase sharply. The circuit protection module 600 can quickly detect this abnormal situation and immediately cut off the circuit to protect the circuit components from damage.

[0064] Based on the above scheme, the circuit protection module 600 can monitor the current passing through the detection resistor in real time to ensure that the power supply circuit and its connected equipment operate within a safe range. Once the current exceeds the preset safety threshold, the protection module will respond quickly and take measures such as cutting off the power supply or adjusting the output current, thereby reducing the risk of faults or accidents caused by abnormal current.

[0065] Furthermore, in the power supply circuit provided by this utility model, the circuit protection module 600 includes an inductor, the first end of which is connected to the current output terminal of the power supply module 100, and the second end of which is connected to the input terminal of the detection resistor.

[0066] Specifically, an inductor is a component in electronics that stores magnetic field energy and generates an electromotive force (EMF) to resist changes in current. Inductors have the characteristic of "passing direct current and blocking alternating current"; that is, for direct current, an inductor provides almost no resistance, while for alternating current, it provides significant resistance, and the higher the frequency of the alternating current, the greater the resistance. Furthermore, inductors can filter the AC component at the power supply output, reducing the impact of AC noise on the circuit.

[0067] When in use, when the output current of the power module 100 suddenly increases, the inductor will generate an electromotive force in the opposite direction to the current change, thereby limiting the rapid increase of current and helping to protect other components in the circuit from the impact of excessive current.

[0068] Based on the above scheme, the inductor plays a role in smoothing the DC current in the power supply circuit. When the power module 100 outputs DC current, the inductor can store and release energy, thereby reducing fluctuations and ripples in the current and making the current more stable. For example, when the current increases abnormally, the inductor will generate a large back electromotive force, thereby limiting further increases in current. Furthermore, the inductor, in conjunction with the sensing resistor, can form a simple filter circuit. When AC components attempt to pass through the inductor, they are impeded due to the inductive reactance of the inductor, while DC components can pass smoothly. Therefore, the inductor helps filter out high-frequency noise and interference in the current.

[0069] This utility model also provides an electronic device including a power supply circuit with the above-described structure. For an electronic device employing a power supply circuit with the above-described structure, please refer to [link / reference needed]. Figure 1 Because the power supply circuit of the above structure works in concert with the detection resistor module 300, the first voltage detection terminal and the second voltage detection terminal of the power module 100, and the current detection module 500, when an overcurrent event occurs in the power module 400 of the electronic device, such as a short circuit in the power module 400 and the current exceeding the maximum current capacity of the power module 100, it can not only protect the power module 100 internally by shutting off its own power output, but also accurately monitor the current supply of the power module 400, optimize the power consumption efficiency of the electronic device, prevent potential problems caused by overcurrent or undercurrent, and thus extend the service life of the electronic device. This real-time monitoring capability can improve the safety of the entire electronic device and reduce the risk of damage or fire caused by abnormal current.

[0070] Electronic equipment refers to devices composed of electronic components such as integrated circuits, transistors, and vacuum tubes, and that function using electronic technology (including software). In this utility model, the type of electronic equipment is not limited, and may include, for example, computers and related equipment, communication equipment, home appliances, office equipment, security monitoring equipment, automotive electronic equipment, etc.

[0071] This utility model also provides a vehicle including a power supply circuit with the above-described structure. For a vehicle using a power supply circuit with the above-described structure, please refer to [link / reference needed]. Figure 1Because the power supply circuit of the above structure works in concert with the detection resistor module 300, the first voltage detection terminal and the second voltage detection terminal of the power module 100, and the current detection module 500, when an overcurrent event occurs in the vehicle's power module 400, such as a short circuit in the vehicle's power module 400 and the current exceeds the maximum current capacity of the power module 100, it can not only protect the vehicle's power module 100 internally by shutting off its own power output, but also accurately monitor the current supply status of the vehicle's power module 400, optimize the vehicle's power usage efficiency, prevent potential problems caused by overcurrent or undercurrent, and thus extend the vehicle's service life. This real-time monitoring capability can improve the overall safety of the vehicle and reduce the risk of vehicle damage or fire caused by abnormal current.

[0072] It should be understood that the type of vehicle for this utility model is not limited; for example, it can be a traditional fuel vehicle or a new energy vehicle.

[0073] The above description illustrates the implementation of this utility model through specific embodiments. Those skilled in the art can easily understand other advantages and effects of this utility model from the content disclosed in this specification. Although the description of this utility model is presented in conjunction with preferred embodiments, this does not mean that the features of this utility model are limited to this embodiment. On the contrary, the purpose of describing the utility model in conjunction with the embodiments is to cover other options or modifications that may be derived based on the claims of this utility model. To provide a deep understanding of this utility model, many specific details are included in the above description. This utility model may also be implemented without using these details. Furthermore, to avoid confusion or obscuring the focus of this utility model, some specific details will be omitted in the description. It should be noted that, without conflict, the embodiments and features in the embodiments of this utility model can be combined with each other.

[0074] It should be noted that in this specification, similar reference numerals and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

[0075] In the description of this embodiment, it should be noted that the terms "upper", "lower", "inner", "bottom", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship that the utility model product is usually placed in during use. They are only for the convenience of describing the utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the utility model.

[0076] The terms “first”, “second”, etc., are used only to distinguish descriptions and should not be interpreted as indicating or implying relative importance.

[0077] In the description of this embodiment, it should also be noted that, unless otherwise explicitly specified and limited, the terms "set up," "connected," and "linked" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this embodiment based on the specific circumstances.

Claims

1. A power supply circuit, characterized in that, The power supply circuit includes a power module, a power management module, a resistor detection module, a power consumption module, and a current detection module; wherein... The current output terminal of the power module is connected to the power consumption module through the detection resistor module to supply power to the power consumption module. The power module is also connected to the input terminal and the output terminal of the detection resistor module through the first voltage detection terminal and the second voltage detection terminal respectively to obtain the voltage information between the input terminal and the output terminal of the detection resistor module. The power management module is connected to the power module to obtain the voltage information between the input and output terminals of the detection resistor module obtained by the power module, so as to obtain the power supply current information of the power consumption module. The current detection module is connected to the input and output terminals of the detection resistor module respectively, and obtains the voltage information between the input and output terminals of the detection resistor module to obtain the power supply current information of the power consumption module.

2. The power supply circuit as described in claim 1, characterized in that, The current detection module includes a current sensing amplifier and an information processing unit; The positive input terminal of the current sensing amplifier is connected to the input terminal of the sensing resistor module, and the negative input terminal of the current sensing amplifier is connected to the output terminal of the sensing resistor module to obtain the voltage information between the input and output terminals of the sensing resistor module. The output terminal of the current sensing amplifier is connected to the information processing unit to send the voltage amplification information corresponding to the voltage information to the information processing unit. The information processing unit obtains the power supply current information of the power consumption module based on the voltage amplification information.

3. The power supply circuit as described in claim 2, characterized in that, The information processing unit includes an analog-to-digital converter and a current calculation unit; The output of the current sensing amplifier is connected to the input of the analog-to-digital converter to send the voltage amplification information to the analog-to-digital converter. The analog-to-digital converter performs analog-to-digital conversion on the voltage amplification information to obtain the corresponding voltage value. The output terminal of the analog-to-digital converter is connected to the current calculation unit, and the voltage value is sent to the current calculation unit. The current calculation unit calculates the power supply current information of the power module based on the voltage value.

4. The power supply circuit as described in claim 3, characterized in that, The detection resistor module includes a detection resistor. The input terminal of the detection resistor is connected to the first voltage detection terminal of the power supply module, and the output terminal of the detection resistor is connected to the second voltage detection terminal of the power supply module and the power supply terminal of the power consumption module, respectively.

5. The power supply circuit as described in claim 4, characterized in that, The power supply circuit also includes a circuit protection module. The first terminal of the circuit protection module is connected to the current output terminal of the power supply module, and the second terminal of the circuit protection module is connected to the input terminal of the detection resistor.

6. The power supply circuit as described in claim 5, characterized in that, The circuit protection module includes an inductor, with its first end connected to the current output terminal of the power supply module and its second end connected to the input terminal of the detection resistor.

7. The power supply circuit as described in claim 6, characterized in that, The power module includes a DC-to-DC power supply chip, the power management module is a microcontroller unit, the current detection module is a microcontroller unit, and the power consumption module is a system-on-a-chip.

8. The power supply circuit as described in claim 7, characterized in that, The system-on-a-chip is the system-on-a-chip in the vehicle domain controller.

9. An electronic device, characterized in that, Includes the power supply circuit as described in any one of claims 1 to 7.

10. A vehicle, characterized in that, Includes the power supply circuit as described in any one of claims 1 to 7.

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