Overcurrent protection circuit and overcurrent protection method

Abstract

The present application discloses an overcurrent protection circuit and an overcurrent protection method. The overcurrent protection circuit comprises an on-off module, a sampling module, and a control module; a first end of the on-off module is connected to a power supply, a second end of the on-off module is connected to a first end of the sampling module, and a control end of the on-off module is connected to an output end of the control module; a second end of the sampling module is connected to an electric device, a third end of the sampling module is connected to a first input end of the control module, and the sampling module is used for converting an output current of the power supply into a voltage; a second input end of the control module is connected to the power supply; and the control module is used for receiving the voltage value of the sampling module, and controlling the on-off module to be turned off when the voltage value is greater than or equal to a preset overcurrent threshold and the duration is greater than or equal to a turn-off threshold.

Description

Overcurrent protection circuit and overcurrent protection method

[0001] CROSS-REFERENCE TO RELATED APPLICATIONS

[0002] This application claims priority to the Chinese patent application filed with the China Patent Office on June 30, 2023, with application number 202310799648.9 and invention name “Overcurrent protection circuit and overcurrent protection method”. The entire contents of the Chinese patent application are incorporated herein by reference. Technical Field

[0003] The present application relates to the field of overcurrent protection, and in particular to an overcurrent protection circuit and an overcurrent protection method. Background Art

[0004] Currently, in the field of electronic circuit technology, circuit design stability is receiving increasing attention. Overcurrent is a common power supply anomaly that can cause circuit malfunctions and, in severe cases, even lead to safety accidents such as device burnout. Therefore, the design of overcurrent protection is extremely necessary.

[0005] In related technologies, the overcurrent protection method is to use an electronic switch to cut off the high-current circuit. Since electronic switches have the characteristics of fast response, high sensitivity, and the ability to disconnect the circuit in the order of microseconds, using electronic switches for overcurrent protection often misjudges normal pulses and surges on the circuit as overcurrent, disconnecting the circuit and causing unnecessary power outages in electrical equipment.

[0006] Summary of the Invention

[0007] In a first aspect, an embodiment of the present application discloses an overcurrent protection circuit, comprising: an on-off module, a sampling module and a control module, wherein: the first end of the on-off module is connected to a power supply, the second end of the on-off module is connected to the first end of the sampling module, and the control end of the on-off module is connected to the output end of the control module; the second end of the sampling module is connected to an electrical device, the third end of the sampling module is connected to the first input end of the control module, and the sampling module is used to convert the output current of the power supply into a voltage; the second input end of the control module is connected to the power supply; the control module is used to receive a voltage value of the sampling module, and control the on-off module to disconnect when the voltage value is greater than or equal to a preset overcurrent threshold and the duration is greater than or equal to a shutdown threshold.

[0008] In a second aspect, an embodiment of the present application discloses an overcurrent protection method, which is applied to the overcurrent protection circuit described in the first aspect above, including: receiving a voltage value from a sampling module; controlling the on-off module to disconnect when the voltage value is greater than or equal to a preset overcurrent threshold and the duration is greater than or equal to the shutdown threshold.

[0009] In a third aspect, an embodiment of the present application provides an electronic device comprising a processor and a memory, wherein the memory stores programs or instructions that can be run on the processor, and when the programs or instructions are executed by the processor, the steps of the method described in the second aspect are implemented.

[0010] In a fourth aspect, an embodiment of the present application provides a readable storage medium, on which a program or instruction is stored. When the program or instruction is executed by a processor, the steps of the method described in the second aspect are implemented.

[0011] In a fifth aspect, an embodiment of the present application provides a chip, which includes a processor and a communication interface, the communication interface is coupled to the processor, and the processor is used to run programs or instructions to implement the method described in the second aspect.

[0012] In a sixth aspect, an embodiment of the present application provides a computer program product, which is stored in a storage medium and is executed by at least one processor to implement the method described in the second aspect. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] FIG1 is a schematic structural diagram of an overcurrent protection circuit disclosed in an embodiment of the present application;

[0014] FIG2 is a flow chart of an overcurrent protection method disclosed in an embodiment of the present application;

[0015] FIG3 is a schematic structural diagram of an electronic device disclosed in an embodiment of the present application. DETAILED DESCRIPTION

[0016] The following will be combined with the accompanying drawings in the embodiments of the present application to clearly describe the technical solutions in the embodiments of the present application. Obviously, the embodiments described are part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field are within the scope of protection of this application.

[0017] The terms "first," "second," and the like in the specification and claims of this application are used to distinguish similar objects, and are not used to describe a specific order or precedence. It should be understood that the terms used in this manner are interchangeable where appropriate, so that the embodiments of this application can be implemented in an order other than that illustrated or described herein, and that the objects distinguished by "first," "second," and the like are generally of the same type, and do not limit the number of objects; for example, the first object can be one or more. In addition, the term "and / or" in the specification and claims refers to at least one of the connected objects, and the character " / " generally indicates that the objects connected are in an "or" relationship.

[0018] The present application discloses an overcurrent protection circuit and an overcurrent protection method. FIG1 is a schematic structural diagram of an overcurrent protection circuit disclosed in an embodiment of the present application.

[0019] As shown in Figure 1, the overcurrent protection circuit disclosed in the embodiment of the present application includes a switching module, a sampling module 110 and a control module 120, wherein: the first end of the switching module is connected to the power supply, the second end of the switching module is connected to the first end of the sampling module 110, and the control end of the switching module is connected to the output end of the control module 120; the second end of the sampling module 110 is connected to the electrical equipment, and the third end of the sampling module 110 is connected to the first input end of the control module 120, and the sampling module 110 is used to convert the output current of the power supply into voltage; the second input end of the control module 120 is connected to the power supply; the control module 120 is used to receive the voltage value of the sampling module 110, and control the switching module to disconnect when the voltage value is greater than or equal to a preset overcurrent threshold and the duration is greater than or equal to the shutdown threshold.

[0020] In the present application, the control module 120 is powered by a power supply, and the on-off module is used to turn on or off the power of the electrical device.

[0021] When the power supply is started and the on-off module is turned on, the sampling module 110 converts the output current of the power supply into a voltage, and transmits the corresponding voltage value to the control module 120 via the first input terminal of the control module 120. After receiving the voltage value from the sampling module 110, the control module 120 compares the voltage value with the preset overcurrent threshold. When the voltage value is greater than or equal to the preset overcurrent threshold and the duration is greater than or equal to the shutdown threshold, it is considered that an overcurrent has occurred that has a substantial impact on the electrical equipment. The control module 120 sends a control signal to the control terminal of the on-off module to control the on-off module to disconnect, cut off the power supply circuit of the electrical equipment, and perform overcurrent protection. At this time, the control module 120 can also set the power-on protection register in the control module 120 to be valid (i.e., 1). If the voltage value is greater than or equal to the preset overcurrent threshold, but persists for less than the shutdown threshold, the control module 120 determines that the overcurrent is likely transient or pulse current, caused by a surge or grid instability, and not a steady-state current. This current will not damage the circuit or substantially impact the electrical equipment. Therefore, the on / off module remains on, preventing unnecessary power outages in the electrical equipment. If the voltage value is less than the preset overcurrent threshold, the circuit is considered to be operating normally.

[0022] An embodiment of the present application provides an overcurrent protection circuit, which includes a switching module, a sampling module 110, and a control module 120. A first end of the switching module is connected to a power supply, a second end of the switching module is connected to a first end of the sampling module 110, a control end of the switching module is connected to an output end of the control module 120, a second end of the sampling module 110 is connected to an electrical device, and a third end of the sampling module 110 is connected to a first input end of the control module 120. The sampling module 110 is configured to convert the output current of the power supply into a voltage. A second input end of the control module 120 is connected to the power supply. The control module 120 is configured to receive a voltage value from the sampling module 110. If the voltage value is greater than or equal to a preset overcurrent threshold and persists for a duration greater than or equal to a shutdown threshold, an overcurrent is determined to have occurred that substantially affects the electrical device. In this case, the control module 120 sends a control signal to the control end of the switching module to control the switching module to disconnect, thereby severing the power supply circuit of the electrical device and performing overcurrent protection. This can prevent unnecessary power loss of the electrical device due to misjudgment.

[0023] In an embodiment of the present application, the control module 120 can also be used to control the on-off module to be turned on when the duration of the on-off module being controlled to be turned off is greater than or equal to a preset duration. That is to say, in the event of an overcurrent that has a substantial impact on the electrical equipment, the control module 120 controls the on-off module to be turned off and then delays power-on. When the duration of the on-off module being turned off is greater than or equal to a preset duration, the control module 120 sends a control signal to the control end of the on-off module to control the on-off module to be turned on and automatically restore the power function without manual operation. By delaying power-on, it is possible to effectively prevent the adverse effects caused by turning on the on-off module again to restore the power function when the overcurrent phenomenon that has a substantial impact on the electrical equipment is not eliminated in time. In addition, when controlling the on-off module to be turned on and automatically restoring the power function, the control module 120 can also set the power-on protection register in the control module 120 to be invalid (i.e., 0).

[0024] In an embodiment of the present application, the shutdown threshold may be a value determined based on the degree of impact of the duration of the preset overcurrent threshold on the electrical device, and the shutdown threshold is negatively correlated with the preset overcurrent threshold. Because the shutdown threshold is determined based on the degree of impact of the duration of the preset overcurrent threshold on the electrical device, the overcurrent protection circuit disclosed in this application can provide more accurate overcurrent protection.

[0025] In the present application, there may be multiple preset overcurrent thresholds. For example, a basic overcurrent threshold may be set, and N in N times the basic overcurrent threshold may be selected. Each value corresponds to a preset overcurrent threshold. For example, depending on the overcurrent situation, the value of N may include 2, 3, 5, 8, or 10, and the corresponding preset overcurrent thresholds may include 2 times the basic overcurrent threshold, 3 times the basic overcurrent threshold, 5 times the basic overcurrent threshold, 8 times the basic overcurrent threshold, and 10 times the basic overcurrent threshold. Based on the degree of impact of the duration of different preset overcurrent thresholds on the electrical equipment, the shutdown threshold corresponding to each preset overcurrent threshold is determined separately to provide more accurate overcurrent protection.

[0026] It should be noted that the shutdown threshold corresponds to the preset overcurrent threshold one-to-one. The larger the preset overcurrent threshold, the smaller the corresponding shutdown threshold is; the smaller the preset overcurrent threshold, the larger the corresponding shutdown threshold is.

[0027] In one implementation, the control module 120 may store a correspondence table between preset overcurrent thresholds and shutdown thresholds, and the correspondence table includes a plurality of correspondences between preset overcurrent thresholds and shutdown thresholds. For example, the correspondence table includes a first preset overcurrent threshold and its corresponding first shutdown threshold, a second overcurrent threshold and its corresponding second shutdown threshold, a third overcurrent threshold and its corresponding third shutdown threshold, the first preset overcurrent threshold < the second preset overcurrent threshold < the third preset overcurrent threshold, and correspondingly, the first shutdown threshold > the second shutdown threshold > the third shutdown threshold. On this basis, when the control module 120 receives the voltage value from the sampling module 110, it first compares the voltage value with each preset overcurrent threshold. If the voltage value is less than the first preset overcurrent threshold, it is considered to be in a normal working state; if the voltage value is greater than or equal to the first preset overcurrent threshold and less than the second preset overcurrent threshold, its duration is further determined. If its duration is When the voltage value is greater than or equal to the second preset overcurrent threshold and less than the third preset overcurrent threshold, the control module 120 controls the on-off module to be disconnected. If the duration is less than the first off-threshold, the on-off module is kept on. When the voltage value is greater than or equal to the second preset overcurrent threshold and less than the third preset overcurrent threshold, the duration is further determined. If the duration is also greater than or equal to the second off-threshold, the control module 120 controls the on-off module to be disconnected. If the duration is less than the second off-threshold, the on-off module is kept on. When the voltage value is greater than or equal to the third preset overcurrent threshold, the duration is further determined. If the duration is also greater than or equal to the third off-threshold, the control module 120 controls the on-off module to be disconnected. If the duration is less than the third off-threshold, the on-off module is kept on.

[0028] In one implementation, as shown in FIG1 , the sampling module 110 may include a sampling resistor and an operational amplifier. The first end of the sampling resistor is connected to the second end of the on-off module, and the second end of the sampling resistor is connected to the electrical device. The sampling resistor is used to convert the output current of the power supply into a voltage. The first input end of the operational amplifier is connected to the first end of the sampling resistor, the second input end of the operational amplifier is connected to the second end of the sampling resistor, and the output end of the operational amplifier is connected to the first input end of the control module 120. In other words, after the output current of the power supply is converted into a voltage by the sampling resistor, the operational amplifier amplifies the voltage across the sampling resistor and transmits the amplified voltage value to the control module 120 via the first input end of the control module 120, so that the control module 120 can make an accurate judgment.

[0029] For example, the resistance of the sampling resistor can be a high-precision resistor of 0.050Ω. If the current output by the power supply is 5A, the voltage on the sampling resistor is 0.25V. If the operational amplifier can amplify the voltage on the sampling resistor by 20 times, the voltage value received by the control module 120 is 5V.

[0030] In one implementation, as shown in FIG1 , the control module 120 may include an analog-to-digital conversion module and a data processing module, wherein a first input terminal of the analog-to-digital conversion module is connected to a third terminal of the sampling module 110, a second input terminal of the analog-to-digital conversion module is connected to the power supply, an output terminal of the analog-to-digital conversion module is connected to an input terminal of the data processing module, and an output terminal of the data processing module is connected to a control terminal of the on-off module; the data processing module is configured to receive target data output by the analog-to-digital conversion module, and control the on-off module to disconnect when the target data indicates that the voltage value of the sampling module 110 is greater than or equal to a preset overcurrent threshold and the duration is greater than or equal to a shutdown threshold.

[0031] In the present application, the analog-to-digital conversion module is powered by a power supply. After receiving the voltage value of the sampling module 110, the analog-to-digital conversion module converts the voltage value from an analog signal to a digital signal, obtains target data corresponding to the voltage value, and sends the target data to the data processing module. When the data processing module receives the target data, and the target data indicates that the voltage value of the sampling module 110 is greater than or equal to the preset overcurrent threshold and the duration is greater than or equal to the shutdown threshold, it is considered that an overcurrent has occurred that has a substantial impact on the electrical equipment. The data processing module sends a control signal to the control end of the on-off module to control the on-off module to disconnect, cut off the power supply circuit of the electrical equipment, and perform overcurrent protection.

[0032] In one implementation, the control module 120 may be a Field-Programmable Gate Array (FPGA) with a built-in analog-to-digital converter (ADC).

[0033] In one implementation, the on-off module may be a control switch.

[0034] In one possible implementation, as shown in FIG1 , the overcurrent protection circuit may further include a first level conversion circuit, a second level conversion circuit, and a third level conversion circuit. The input of the first level conversion circuit is connected to the output of the control module 120, and the output of the first level conversion circuit is connected to the control terminal of the on-off module. The input of the second level conversion circuit is connected to the power supply, and the output of the second level conversion circuit is connected to the second input of the control module 120. The input of the third level conversion circuit is connected to the third terminal of the sampling module 110, and the output of the third level conversion circuit is connected to the first input of the control module 120. The first level conversion circuit is configured to convert the voltage output by the control module 120 into a driving voltage for the on-off module. The second level conversion circuit is configured to convert the power supply voltage into a voltage within the input range of the control module 120. The third level conversion circuit is configured to convert the voltage of the sampling module 110 into a voltage within the input range of the control module 120.

[0035] In an embodiment of the present application, as shown in FIG1 , the control module 120 can also be connected to a host computer. The host computer configures the relevant register parameters in the control module 120 so that the control module 120 implements the control functions described above. The registers in the control module 120 may include a power-on protection register, an N-fold overcurrent threshold register, a shutdown threshold register, a sampling period register, a normal power supply threshold register, a delayed power-on time threshold register, a power-on status register, and the like. Furthermore, the host computer can query the register status in the control module 120 to know the circuit working status and historical occurrence time, thereby timely judging the stability of the circuit and the reliability of the electrical equipment, and preventing and avoiding the occurrence of accidents and sudden problems. For example, if the on-off module is always in the off state and the power-on protection register is invalid, the control module 120 assumes that the power is not turned on and no overcurrent has occurred that has a substantial impact on the electrical equipment; if the on-off module is in the off state and the power-on protection register is valid, it is determined that an overcurrent has occurred that has a substantial impact on the electrical equipment, the on-off module is disconnected, the power supply circuit of the electrical equipment is cut off, and overcurrent protection is performed.

[0036] The overcurrent protection circuit disclosed in the present application can be applied to equipment and devices such as communications, robotics, the Internet of Things, industrial control, and power automation, as well as to areas with frequent lightning strikes and unstable power supplies that can easily impact electrical equipment and cause device short circuits.

[0037] The present application also discloses an overcurrent protection method, which is applied to the above-mentioned overcurrent protection circuit. FIG2 is a flow chart of an overcurrent protection method disclosed in the present application. As shown in FIG2, the method includes the following steps:

[0038] S220 , receiving a voltage value from the sampling module 110 .

[0039] S240: When the voltage value is greater than or equal to the preset overcurrent threshold and the duration is greater than or equal to the shutdown threshold, control the on-off module to disconnect.

[0040] The overcurrent protection method provided in the embodiment of the present application receives the voltage value of the sampling module 110. When the voltage value is greater than or equal to the preset overcurrent threshold and lasts for a period greater than or equal to the shutdown threshold, an overcurrent that has a substantial impact on the electrical equipment occurs, and the on-off module is controlled to disconnect, thereby avoiding unnecessary power failure of the electrical equipment due to misjudgment.

[0041] If the voltage is greater than or equal to the preset overcurrent threshold but persists for less than the shutdown threshold, the overcurrent is considered transient or pulse current, caused by surges or grid instability. It is not a steady-state current and will not damage the circuit or substantially impact the electrical equipment. The on / off module remains on. If the voltage is less than the preset overcurrent threshold, the circuit is considered to be operating normally.

[0042] In an embodiment of the present application, after the on-off module is controlled to be disconnected, the method may further include: controlling the on-off module to be turned on if the duration of the on-off module's disconnection is greater than or equal to a preset duration. In other words, if the duration of the on-off module's disconnection is greater than or equal to a preset duration, the on-off module is controlled to be turned on, automatically restoring the power supply function without requiring manual operation. By delaying power-on, the adverse effects caused by turning the on-off module back on to restore the power supply function can be effectively prevented if an overcurrent condition that has a substantial impact on the electrical equipment is not promptly eliminated.

[0043] In one implementation, the shutdown threshold is determined based on the degree of impact of the duration of the preset overcurrent threshold on the electrical device, and the shutdown threshold is negatively correlated with the preset overcurrent threshold. Because the shutdown threshold is determined based on the degree of impact of the duration of the preset overcurrent threshold on the electrical device, the overcurrent protection circuit disclosed in this application can provide more accurate overcurrent protection.

[0044] Optionally, as shown in Figure 3, an embodiment of the present application also provides an electronic device 300, including a processor 301 and a memory 302, and the memory 302 stores a program or instruction that can be run on the processor 301. When the program or instruction is executed by the processor 301, the various steps of the above-mentioned overcurrent protection method embodiment are implemented and the same technical effect can be achieved. To avoid repetition, it will not be repeated here.

[0045] It should be noted that the electronic devices in the embodiments of the present application include the mobile electronic devices and non-mobile electronic devices mentioned above.

[0046] An embodiment of the present application also provides a readable storage medium, on which a program or instruction is stored. When the program or instruction is executed by a processor, the various processes of the above-mentioned overcurrent protection method embodiment are implemented and the same technical effect can be achieved. To avoid repetition, it will not be repeated here.

[0047] The processor is the processor in the electronic device described in the above embodiment. The readable storage medium includes a computer readable storage medium, such as a computer read-only memory (ROM), a random access memory (RAM), a magnetic disk, or an optical disk.

[0048] An embodiment of the present application further provides a chip, which includes a processor and a communication interface, wherein the communication interface is coupled to the processor, and the processor is used to run programs or instructions to implement the various processes of the above-mentioned overcurrent protection method embodiment and achieve the same technical effect. To avoid repetition, it will not be repeated here.

[0049] It should be understood that the chip mentioned in the embodiments of the present application can also be called a system-level chip, a system chip, a chip system or a system-on-chip chip, etc.

[0050] An embodiment of the present application provides a computer program product, which is stored in a storage medium. The program product is executed by at least one processor to implement the various processes of the above-mentioned overcurrent protection method embodiment and can achieve the same technical effect. To avoid repetition, it will not be repeated here.

[0051] The above embodiments of this application focus on the differences between the various embodiments. As long as the different optimization features between the various embodiments are not contradictory, they can be combined to form a better embodiment. Considering the simplicity of the text, they will not be repeated here.

[0052] The foregoing is merely an embodiment of the present application and is not intended to limit the present application. For those skilled in the art, the present application may have various changes and variations. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present application should all be included within the scope of the claims of the present application.

Claims

1. An overcurrent protection circuit, wherein: include: On-off module, sampling module and control module, wherein: The first end of the on-off module is connected to the power supply, the second end of the on-off module is connected to the first end of the sampling module, and the control end of the on-off module is connected to the output end of the control module; The second end of the sampling module is connected to the power-consuming device, the third end of the sampling module is connected to the first input end of the control module, and the sampling module is used to convert the output current of the power supply into a voltage; The second input terminal of the control module is connected to the power supply; The control module is used to receive the voltage value of the sampling module, and control the on-off module to disconnect when the voltage value is greater than or equal to a preset overcurrent threshold and the duration is greater than or equal to a shutdown threshold.

2. The overcurrent protection circuit according to claim 1, wherein: The control module is further configured to control the on-off module to be turned on when the time duration for controlling the on-off module to be turned off is greater than or equal to a preset time duration.

3. The overcurrent protection circuit according to claim 1, wherein: The shutdown threshold is a value determined according to the degree of influence of the duration of the preset overcurrent threshold on the electrical device, and the shutdown threshold is negatively correlated with the preset overcurrent threshold.

4. The overcurrent protection circuit according to claim 1, wherein: The sampling module includes a sampling resistor and an operational amplifier, the first end of the sampling resistor is connected to the second end of the on-off module, the second end of the sampling resistor is connected to the electrical device, and the sampling resistor is used to convert the output current of the power supply into a voltage; The first input end of the operational amplifier is connected to the first end of the sampling resistor, the second input end of the operational amplifier is connected to the second end of the sampling resistor, and the output end of the operational amplifier is connected to the first input end of the control module.

5. The overcurrent protection circuit according to claim 1, wherein: The control module includes an analog-to-digital conversion module and a data processing module, wherein a first input terminal of the analog-to-digital conversion module is connected to a third terminal of the sampling module, a second input terminal of the analog-to-digital conversion module is connected to the power supply, an output terminal of the analog-to-digital conversion module is connected to an input terminal of the data processing module, and an output terminal of the data processing module is connected to a control terminal of the on-off module; The data processing module is used to receive the target data output by the analog-to-digital conversion module, and control the on-off module to disconnect when the target data indicates that the voltage value of the sampling module is greater than or equal to a preset overcurrent threshold and the duration is greater than or equal to a shutdown threshold.

6. The overcurrent protection circuit according to claim 1, wherein: It also includes a first level conversion circuit, a second level conversion circuit and a third level conversion circuit, wherein the input end of the first level conversion circuit is connected to the output end of the control module, and the output end of the first level conversion circuit is connected to the control end of the on-off module; The input end of the second level conversion circuit is connected to the power supply, and the output end of the second level conversion circuit is connected to the second input end of the control module; The input end of the third level conversion circuit is connected to the third end of the sampling module, and the output end of the third level conversion circuit is connected to the first input end of the control module.

7. The overcurrent protection circuit according to claim 1, wherein: The control module is also connected to the host computer.

8. An overcurrent protection method, wherein: The overcurrent protection circuit as claimed in any one of claims 1 to 7 comprises: Receive the voltage value of the sampling module; When the voltage value is greater than or equal to the preset overcurrent threshold and the duration is greater than or equal to the shutdown threshold, the on-off module is controlled to be disconnected.

9. The overcurrent protection method according to claim 8, wherein: After the control on-off module is disconnected, the method further comprises: When the duration of controlling the on-off module to be turned off is greater than or equal to the preset duration, the on-off module is controlled to be turned on.

10. The overcurrent protection method according to claim 8, wherein: The shutdown threshold is a value determined according to the degree of influence of the duration of the preset overcurrent threshold on the electrical equipment, and the shutdown threshold is negatively correlated with the preset overcurrent threshold.

11. An electronic device, wherein: It comprises a processor and a memory, wherein the memory stores a program or instruction that can be run on the processor, and when the program or instruction is executed by the processor, the steps of the overcurrent protection method as described in any one of claims 8 to 10 are implemented.

12. A readable storage medium, wherein: The readable storage medium stores a program or instruction, and when the program or instruction is executed by the processor, the steps of the overcurrent protection method as described in any one of claims 8 to 10 are implemented.

13. A chip, wherein: The chip includes a processor and a communication interface, the communication interface is coupled to the processor, and the processor is used to run a program or instruction to implement the overcurrent protection method as described in any one of claims 8-10.

14. A computer program product, wherein: The program product is stored in a storage medium, and the program product is executed by at least one processor to implement the overcurrent protection method according to any one of claims 8 to 10.

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