CN117175487A - Short-circuit protection circuit, method and readable storage medium - Google Patents
Short-circuit protection circuit, method and readable storage medium Download PDFInfo
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Abstract
The application provides a short-circuit protection circuit, a short-circuit protection method and a readable storage medium, wherein the short-circuit protection circuit comprises the following components: the device comprises a power interface module, a first voltage detection module, a second voltage detection module, a control module, a relay and a load interface module; the driving end of the relay is connected in series into one bus, and is normally open; the control module is also suitable for judging whether the load is short-circuited according to the first voltage and the second voltage, and completing short-circuit protection. The driving end of the relay is normally opened to be connected into the main loop, so that the safety of the circuit is improved, a driving mode of matching hardware and software is adopted, and the state of the loop is judged by collecting data through the singlechip, so that the relay is driven, and the circuit short-circuit protection is met. Meanwhile, the power supply of the singlechip is connected into the power interface module through the rectifier bridge, so that the power interface module does not need to distinguish the anode and the cathode of the input end, thereby eliminating the nonpolar electrolytic capacitor and reducing the hardware cost.
Description
Technical Field
The present application relates to the field of short-circuit protection, and in particular, to a short-circuit protection circuit, a short-circuit protection method, and a readable storage medium.
Background
When the load is connected to a direct current power supply, overcurrent protection is needed.
At present, a pure hardware circuit scheme is adopted, and a nonpolar electrolytic capacitor is adopted, so that the input anode and cathode can be not distinguished; the current of the output loop is sampled, and the current is larger than the current which controls the relay on the loop to be attracted and disconnected with the main loop by switching on the triode, so that the output overcurrent protection is realized.
When short circuit occurs, the input voltage is pulled down to be close to 0V, the relay is normally closed because the main loop is connected, the relay is disconnected, the relay is required to be attracted, and the relay is attracted to work on the premise that the relay coil has normal power supply voltage, so that the output short circuit protection function cannot be realized.
The above problems are currently in need of solution.
Disclosure of Invention
The application aims to provide a short-circuit protection circuit, a short-circuit protection method and a readable storage medium.
In order to solve the above technical problems, the present application provides a short-circuit protection circuit, including:
the device comprises a power interface module, a first voltage detection module, a second voltage detection module, a control module, a relay and a load interface module;
two buses of the power interface module are respectively connected with a first current detection resistor and a second current detection resistor in series and then are electrically connected with the load interface module;
the driving end of the relay is connected in series into one bus, and is normally open;
the first voltage detection module is connected in parallel with two ends of the power interface module and is suitable for detecting the first voltage of the power interface module and sending the first voltage to the control module;
the control module is suitable for controlling the closing of the driving end of the relay according to the received first voltage, and communicating the power interface module with the load interface module;
the two ends of the second voltage detection module are respectively and electrically connected between the first detection resistor and the load interface module and between the second detection resistor and the load interface module, and are suitable for detecting the second voltage passing through the first detection resistor and the second detection resistor and sending the second voltage to the control module;
the control module is further adapted to judge whether the load is short-circuited according to the first voltage and the second voltage, and if yes, the driving end of the relay is controlled to be disconnected, and short-circuit protection is completed.
Further, the first voltage detection module comprises a first voltage value detection unit and a second voltage value detection unit;
the first voltage value detection unit and the second voltage value detection unit are respectively and electrically connected to the two buses.
Further, the second voltage detection module comprises a third voltage value detection unit and a fourth voltage value detection unit;
the third voltage value detection unit and the fourth voltage value detection unit are respectively and electrically connected between the first detection resistor and the load interface module and between the second detection resistor and the load interface module.
Further, the short-circuit protection circuit further comprises a voltage conversion module;
the voltage conversion module is electrically connected to two ends of the power interface module and is suitable for supplying power to the control module and the relay.
Further, the voltage conversion module comprises a rectifier bridge and a voltage stabilizing unit;
the rectifier bridge is electrically connected between the power interface module and the voltage stabilizing unit.
Further, the control module is further adapted to determine whether the load is shorted according to the first voltage and the second voltage, i.e.:
setting a protection value, comparing the protection value with a difference value between the first voltage and the second voltage, and if the difference value between the first voltage and the second voltage is larger than the protection value, generating a short circuit, otherwise, not generating the short circuit.
The application also provides a short-circuit protection method of the short-circuit protection circuit, which comprises the following steps:
acquiring first voltages at two ends of a power interface module through a first voltage detection module;
judging whether the power interface module is electrified or not according to the first voltage;
if the power is on, the driving end of the driving relay is closed;
acquiring a second voltage passing through the first detection resistor and the second detection resistor through a second voltage detection module;
judging whether the load is short-circuited or not according to the first voltage and the second voltage;
if short circuit occurs, the driving end of the relay is controlled to be disconnected, and short circuit protection is completed.
Further, the step of judging whether the load is shorted according to the first voltage and the second voltage, namely:
setting a protection value;
and comparing the protection value with the difference value between the first voltage and the second voltage, and if the difference value between the first voltage and the second voltage is larger than the protection value, generating a short circuit, otherwise, not generating the short circuit.
The application also provides a computer readable storage medium, wherein at least one instruction is stored in the computer readable storage medium, and the instruction realizes the short circuit protection method when being executed by a processor.
The application also provides an electronic device, which comprises a memory and a processor; at least one instruction is stored in the memory; the processor loads and executes the at least one instruction to implement the short-circuit protection method.
The application provides a short-circuit protection circuit, a method and a readable storage medium, wherein the short-circuit protection circuit comprises: the device comprises a power interface module, a first voltage detection module, a second voltage detection module, a control module, a relay and a load interface module; two buses of the power interface module are respectively connected with a first current detection resistor and a second current detection resistor in series and then are electrically connected with the load interface module; the driving end of the relay is connected in series into one bus, and is normally open; the first voltage detection module is connected in parallel with two ends of the power interface module and is suitable for detecting the first voltage of the power interface module and sending the first voltage to the control module; the control module is suitable for controlling the closing of the driving end of the relay according to the received first voltage, and communicating the power interface module with the load interface module; the two ends of the second voltage detection module are respectively and electrically connected between the first detection resistor and the load interface module and between the second detection resistor and the load interface module, and are suitable for detecting the second voltage passing through the first detection resistor and the second detection resistor and sending the second voltage to the control module; the control module is further adapted to judge whether the load is short-circuited according to the first voltage and the second voltage, and if yes, the driving end of the relay is controlled to be disconnected, and short-circuit protection is completed. The driving end of the relay is normally opened to be connected into the main loop, so that the safety of the circuit is improved, a driving mode of matching hardware and software is adopted, and the state of the loop is judged by collecting data through the singlechip, so that the relay is driven, and the circuit short-circuit protection is met. Meanwhile, the power supply of the singlechip is connected into the power interface module through the rectifier bridge, so that the power interface module does not need to distinguish the anode and the cathode of the input end, thereby eliminating the nonpolar electrolytic capacitor and reducing the hardware cost.
Drawings
The application will be further described with reference to the drawings and examples.
Fig. 1 is a circuit diagram of a short-circuit protection circuit provided by the present application.
Fig. 2 is a flow chart of a short-circuit protection method provided by the application.
Fig. 3 is a partial schematic block diagram of an electronic device provided by the present application.
Detailed Description
The application will now be described in further detail with reference to the accompanying drawings. The drawings are simplified schematic representations which merely illustrate the basic structure of the application and therefore show only the structures which are relevant to the application.
Example 1
Referring to fig. 1, the present embodiment provides a short-circuit protection circuit, including: the device comprises a power interface module, a first voltage detection module, a second voltage detection module, a control module, a relay and a load interface module; two buses of the power interface module are respectively connected with a first current detection resistor and a second current detection resistor in series and then are electrically connected with the load interface module; the driving end of the relay is connected in series into one bus, and is normally open; the first voltage detection module is connected in parallel with two ends of the power interface module and is suitable for detecting the first voltage of the power interface module and sending the first voltage to the control module; the control module is suitable for controlling the closing of the driving end of the relay according to the received first voltage, and communicating the power interface module with the load interface module; the two ends of the second voltage detection module are respectively and electrically connected between the first detection resistor R1 and the load interface module as well as between the second detection resistor R10 and the load interface module, and are suitable for detecting the second voltage passing through the first detection resistor R1 and the second detection resistor R10 and sending the second voltage to the control module; the control module is further adapted to judge whether the load is short-circuited according to the first voltage and the second voltage, and if yes, the driving end of the relay is controlled to be disconnected, and short-circuit protection is completed. The driving end of the relay is normally opened to be connected into the main loop, so that the safety of the circuit is improved, a driving mode of matching hardware and software is adopted, and the state of the loop is judged by collecting data through the singlechip, so that the relay is driven, and the circuit short-circuit protection is met.
In this embodiment, the first voltage detection module includes a first voltage value detection unit and a second voltage value detection unit; the first voltage value detection unit and the second voltage value detection unit are respectively and electrically connected to the two buses.
The first voltage value detection unit comprises a resistor R12 and a resistor R11, one end of the resistor R12 and one end of the resistor R11 are grounded after being connected in series, the other end of the resistor R12 and one end of the resistor R11 are electrically connected to a bus of the power interface module, and a detection port AD1 of the control module is electrically connected between the resistor R12 and the resistor R11.
The second voltage value detection unit comprises a resistor R13 and a resistor R14, wherein one end of the resistor R13 and one end of the resistor R14 are grounded after being connected in series, the other end of the resistor R13 and one end of the resistor R14 are electrically connected to the other bus of the power interface module, and a detection port AD2 of the control module is electrically connected between the resistor R13 and the resistor R14.
In this embodiment, the second voltage detection module includes a third voltage value detection unit and a fourth voltage value detection unit; the third voltage value detection unit and the fourth voltage value detection unit are respectively and electrically connected between the first detection resistor and the load interface module and between the second detection resistor and the load interface module.
The third voltage value detecting unit includes a resistor R3 and a resistor R2, wherein the resistor R3 and the resistor R2 are connected in series, and then one end is grounded, the other end is electrically connected between the first current detecting resistor R1 and the load interface module, and the detecting port 14 of the control module is electrically connected between the resistor R3 and the resistor R2.
The fourth voltage value detection unit comprises a resistor R9 and a resistor R8, wherein the resistor R9 and the resistor R8 are connected in series, the rear end of the resistor R8 is grounded, the other end of the resistor R8 is electrically connected between the second current detection resistor R10 and the load interface module, and the detection port 13 of the control module is electrically connected between the resistor R8 and the resistor R9.
In this embodiment, the short-circuit protection circuit further includes a voltage conversion module; the voltage conversion module is electrically connected to two ends of the power interface module and is suitable for supplying power to the control module and the relay.
The voltage conversion module comprises a rectifier bridge and a voltage stabilizing unit; the rectifier bridge is electrically connected between the power interface module and the voltage stabilizing unit. The power supply of the singlechip is connected into the power interface module through the rectifier bridge, so that the power interface module does not need to distinguish the anode and the cathode of the input end, thereby eliminating the nonpolar electrolytic capacitor and reducing the hardware cost.
In this embodiment, the control module is further adapted to determine whether the load is shorted according to the first voltage and the second voltage, that is: setting a protection value, comparing the protection value with a difference value between the first voltage and the second voltage, and if the difference value between the first voltage and the second voltage is larger than the protection value, generating a short circuit, otherwise, not generating the short circuit.
Example 2
The embodiment provides a short-circuit protection method for a short-circuit protection circuit, which is provided by embodiment 1, by normally opening the driving end of a relay into a main circuit, the safety of the circuit is improved, and the state of the circuit is judged by adopting a driving mode of matching hardware and software and collecting data through a singlechip, so that the relay is driven, and the short-circuit protection of the circuit is satisfied.
Specifically, the method comprises the steps of:
s110: acquiring first voltages at two ends of a power interface module through a first voltage detection module;
s120: judging whether the power interface module is electrified or not according to the first voltage;
s130: if the power is on, the driving end of the driving relay is closed;
s140: acquiring a second voltage passing through the first detection resistor and the second detection resistor through a second voltage detection module;
s150: judging whether the load is short-circuited or not according to the first voltage and the second voltage.
Specifically, step S150 includes the steps of:
setting a protection value;
and comparing the protection value with the difference value between the first voltage and the second voltage, and if the difference value between the first voltage and the second voltage is larger than the protection value, generating a short circuit, otherwise, not generating the short circuit.
S160: if short circuit occurs, the driving end of the relay is controlled to be disconnected, and short circuit protection is completed.
Example 3
The present embodiment provides a computer-readable storage medium having stored therein at least one instruction that when executed by a processor implements the short circuit protection method provided by embodiment 2.
The short-circuit protection method improves the safety of a circuit by normally opening the driving end of the relay into the main circuit, adopts a driving mode of matching hardware and software, and judges the state of the circuit by collecting data through the singlechip, thereby driving the relay and meeting the short-circuit protection of the circuit.
Example 4
Referring to fig. 3, the present embodiment provides an electronic device, including: a memory 502 and a processor 501; at least one program instruction is stored in the memory 502; the processor 501 implements the short circuit protection method as provided in embodiment 2 by loading and executing the at least one program instruction.
The memory 502 and the processor 501 are connected by a bus, which may include any number of interconnected buses and bridges, which connect together the various circuits of the one or more processors 501 and the memory 502. The bus may also connect various other circuits such as peripherals, voltage regulators, and power management circuits, which are well known in the art, and therefore, will not be described any further herein. The bus interface provides an interface between the bus and the transceiver. The transceiver may be one element or may be a plurality of elements, such as a plurality of receivers and transmitters, providing a means for communicating with various other apparatus over a transmission medium. The data processed by the processor 501 is transmitted over a wireless medium via an antenna, which further receives the data and transmits the data to the processor 501.
The processor 501 is responsible for managing the bus and general processing and may also provide various functions including timing, peripheral interfaces, voltage regulation, power management, and other control functions. And memory 502 may be used to store data used by processor 501 in performing operations.
In summary, the present application provides a short-circuit protection circuit, a method and a readable storage medium, wherein the short-circuit protection circuit includes: the device comprises a power interface module, a first voltage detection module, a second voltage detection module, a control module, a relay and a load interface module; two buses of the power interface module are respectively connected with a first current detection resistor and a second current detection resistor in series and then are electrically connected with the load interface module; the driving end of the relay is connected in series into one bus, and is normally open; the first voltage detection module is connected in parallel with two ends of the power interface module and is suitable for detecting the first voltage of the power interface module and sending the first voltage to the control module; the control module is suitable for controlling the closing of the driving end of the relay according to the received first voltage, and communicating the power interface module with the load interface module; the two ends of the second voltage detection module are respectively and electrically connected between the first detection resistor and the load interface module and between the second detection resistor and the load interface module, and are suitable for detecting the second voltage passing through the first detection resistor and the second detection resistor and sending the second voltage to the control module; the control module is further adapted to judge whether the load is short-circuited according to the first voltage and the second voltage, and if yes, the driving end of the relay is controlled to be disconnected, and short-circuit protection is completed. The driving end of the relay is normally opened to be connected into the main loop, so that the safety of the circuit is improved, a driving mode of matching hardware and software is adopted, and the state of the loop is judged by collecting data through the singlechip, so that the relay is driven, and the circuit short-circuit protection is met. Meanwhile, the power supply of the singlechip is connected into the power interface module through the rectifier bridge, so that the power interface module does not need to distinguish the anode and the cathode of the input end, thereby eliminating the nonpolar electrolytic capacitor and reducing the hardware cost.
The components (components not illustrating the specific structure) selected in the present application are common standard components or components known to those skilled in the art, and the structures and principles thereof are known to those skilled in the art through technical manuals or through routine experimental methods. Moreover, the software program related to the application is the prior art, and the application does not relate to any improvement on the software program.
In the description of embodiments of the present application, unless explicitly specified and limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present application will be understood in specific cases by those of ordinary skill in the art.
In the description of the present application, it should be noted that the directions or positional relationships indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. are based on the directions or positional relationships shown in the drawings, are merely for convenience of describing the present application and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present application. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
In the several embodiments provided by the present application, it should be understood that the disclosed systems, devices, and methods may be implemented in other manners. The above-described apparatus embodiments are merely illustrative, for example, the division of the units is merely a logical function division, and there may be other manners of division in actual implementation, and for example, multiple units or components may be combined or integrated into another system, or some features may be omitted, or not performed. Alternatively, the coupling or direct coupling or communication connection shown or discussed with each other may be through some communication interface, device or unit indirect coupling or communication connection, which may be in electrical, mechanical or other form.
The units described as separate units may or may not be physically separate, and units shown as units may or may not be physical units, may be located in one place, or may be distributed on a plurality of network units. Some or all of the units may be selected according to actual needs to achieve the purpose of the solution of this embodiment.
In addition, each functional unit in the embodiments of the present application may be integrated in one processing unit, or each unit may exist alone physically, or two or more units may be integrated in one unit.
With the above-described preferred embodiments according to the present application as an illustration, the above-described descriptions can be used by persons skilled in the relevant art to make various changes and modifications without departing from the scope of the technical idea of the present application. The technical scope of the present application is not limited to the description, but must be determined according to the scope of claims.
Claims (10)
1. A short-circuit protection circuit, comprising:
the device comprises a power interface module, a first voltage detection module, a second voltage detection module, a control module, a relay and a load interface module;
two buses of the power interface module are respectively connected with a first current detection resistor and a second current detection resistor in series and then are electrically connected with the load interface module;
the driving end of the relay is connected in series into one bus, and is normally open;
the first voltage detection module is connected in parallel with two ends of the power interface module and is suitable for detecting the first voltage of the power interface module and sending the first voltage to the control module;
the control module is suitable for controlling the closing of the driving end of the relay according to the received first voltage, and communicating the power interface module with the load interface module;
the two ends of the second voltage detection module are respectively and electrically connected between the first detection resistor and the load interface module and between the second detection resistor and the load interface module, and are suitable for detecting the second voltage passing through the first detection resistor and the second detection resistor and sending the second voltage to the control module;
the control module is further adapted to judge whether the load is short-circuited according to the first voltage and the second voltage, and if yes, the driving end of the relay is controlled to be disconnected, and short-circuit protection is completed.
2. The short-circuit protection circuit of claim 1, wherein,
the first voltage detection module comprises a first voltage value detection unit and a second voltage value detection unit;
the first voltage value detection unit and the second voltage value detection unit are respectively and electrically connected to the two buses.
3. The short-circuit protection circuit of claim 1, wherein,
the second voltage detection module comprises a third voltage value detection unit and a fourth voltage value detection unit;
the third voltage value detection unit and the fourth voltage value detection unit are respectively and electrically connected between the first detection resistor and the load interface module and between the second detection resistor and the load interface module.
4. The short-circuit protection circuit of claim 1, wherein,
the short-circuit protection circuit further comprises a voltage conversion module;
the voltage conversion module is electrically connected to two ends of the power interface module and is suitable for supplying power to the control module and the relay.
5. The short-circuit protection circuit of claim 4, wherein,
the voltage conversion module comprises a rectifier bridge and a voltage stabilizing unit;
the rectifier bridge is electrically connected between the power interface module and the voltage stabilizing unit.
6. The short-circuit protection circuit of claim 1, wherein the control module is further adapted to determine whether the load is shorted based on the first voltage and the second voltage, i.e.:
setting a protection value, comparing the protection value with a difference value between the first voltage and the second voltage, and if the difference value between the first voltage and the second voltage is larger than the protection value, generating a short circuit, otherwise, not generating the short circuit.
7. A short-circuit protection method of a short-circuit protection circuit according to any one of claims 1-6, characterized in that the method comprises:
acquiring first voltages at two ends of a power interface module through a first voltage detection module;
judging whether the power interface module is electrified or not according to the first voltage;
if the power is on, the driving end of the driving relay is closed;
acquiring a second voltage passing through the first detection resistor and the second detection resistor through a second voltage detection module;
judging whether the load is short-circuited or not according to the first voltage and the second voltage;
if short circuit occurs, the driving end of the relay is controlled to be disconnected, and short circuit protection is completed.
8. The short-circuit protection method according to claim 7, wherein,
the step of judging whether the load is shorted according to the first voltage and the second voltage, namely:
setting a protection value;
and comparing the protection value with the difference value between the first voltage and the second voltage, and if the difference value between the first voltage and the second voltage is larger than the protection value, generating a short circuit, otherwise, not generating the short circuit.
9. A computer readable storage medium having stored therein at least one instruction, wherein the instructions when executed by a processor implement the short circuit protection method of any one of claims 7 to 8.
10. An electronic device comprising a memory and a processor; at least one instruction is stored in the memory; the processor, by loading and executing the at least one instruction, implements the short circuit protection method of any one of claims 7 to 8.
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| CN202311445196.0A CN117175487B (en) | 2023-11-02 | 2023-11-02 | Short-circuit protection circuit, method and readable storage medium |
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| CN202311445196.0A CN117175487B (en) | 2023-11-02 | 2023-11-02 | Short-circuit protection circuit, method and readable storage medium |
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| CN102593788A (en) * | 2012-03-28 | 2012-07-18 | 桂林航天电子有限公司 | Short circuit/ overcurrent protection controller and operation method |
| CN106099840A (en) * | 2016-08-15 | 2016-11-09 | 珠海格力电器股份有限公司 | Protection circuit of power supply circuit and power supply circuit |
| CN109149514A (en) * | 2018-08-21 | 2019-01-04 | 广东安居宝数码科技股份有限公司 | Output protection circuit and control method, the building speakerphone of power supply |
| CN209805407U (en) * | 2019-03-19 | 2019-12-17 | 浙江大华技术股份有限公司 | Short-circuit protection circuit |
| CN112787304A (en) * | 2019-11-08 | 2021-05-11 | 株洲中车时代电气股份有限公司 | Pure solid-state short circuit protection device for ship direct-current power grid |
| CN112904212A (en) * | 2019-12-03 | 2021-06-04 | 深圳拓邦股份有限公司 | Short circuit detection method and device and electrical equipment |
| CN213906285U (en) * | 2020-11-24 | 2021-08-06 | 惠州华阳通用电子有限公司 | POC protection circuit |
| CN112242737A (en) * | 2020-12-18 | 2021-01-19 | 苏州赛芯电子科技股份有限公司 | Lithium battery charging overcurrent protection circuit and lithium battery |
| CN216625279U (en) * | 2021-10-13 | 2022-05-27 | 深圳市有方科技股份有限公司 | Automatic short-circuit protection circuit and system |
| CN114530823A (en) * | 2022-03-23 | 2022-05-24 | 天津雅迪实业有限公司 | Short-circuit protection system for electric vehicle |
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