Circuit breaker detection circuit

Abstract

The utility model relates to a circuit breaker detection circuit in the field of battery energy storage, which comprises an input module, a first output module, a second output module and an MCU (Microprogrammed Control Unit), compared with the prior art, the circuit breaker detection circuit is connected with an auxiliary contact of a circuit breaker through the input module, so that high-level and low-level signals can be accurately received; the circuit breaker inputs a high level to the input module when being closed, the first output module can output a high level signal to the MCU according to the high level signal, the MCU senses that the current circuit breaker is in a closed state according to the output of the first output module, and the circuit breaker inputs a low level to the input module when being opened. The second output module can output a low-level signal to the MCU according to the low-level signal, and the MCU senses that the current circuit breaker is in an off state according to the output of the second output module. Through the above arrangement, the MCU can be ensured to monitor the on-off state of the circuit breaker in real time, accurate circuit state feedback is provided, and safe operation of the system is guaranteed.

Description

TECHNICAL FIELD

[0001] The utility model relates to the field of battery energy storage, especially a circuit breaker detection circuit. BACKGROUND

[0002] The battery energy storage cabinet is an advanced integrated device, containing components such as batteries, electronic controllers and sensors, for storing and releasing electric energy. However, the existing battery energy storage cabinet has some technical defects in the circuit system, mainly in the management and monitoring of circuit breakers.

[0003] In the current battery energy storage cabinet circuit system, a variety of circuit breakers are equipped, including emergency stop circuit breakers. The main function of the emergency stop circuit breaker is to quickly cut off the circuit when the power equipment or line fails, preventing the spread of the fault, thereby protecting the battery and other electrical components from damage. The switch state of the circuit breaker reflects the running status of the internal circuit of the battery energy storage cabinet, which is the key to determining whether the system is working normally.

[0004] However, the existing technology has significant deficiencies in the detection and management of circuit breakers. Although the physical switch state of the circuit breaker can provide some circuit state information, it lacks a reliable and accurate detection circuit to monitor the real-time state of the circuit breaker, making it difficult to discover and handle potential faults in time during circuit operation. SUMMARY

[0005] To solve the above technical problems, the utility model provides a circuit breaker detection circuit that can accurately detect the switch state of the circuit breaker and ensure the safety and reliability of the system. The technical solution of the utility model is as follows:

[0006] The utility model provides a circuit breaker detection circuit, comprising an input module, a first output module, a second output module and an MCU, wherein the input module is connected to the auxiliary contact of the circuit breaker and is used to receive the level signal of the auxiliary contact of the circuit breaker.

[0007] Specifically, the input module is connected to the first output module, the first output module is connected to the MCU, and when the input module receives a high-level signal as the level signal, it inputs a signal to the first output module, and the first output module outputs the high-level signal to the MCU.

[0008] Specifically, the input module is connected to the second output module, the second output module is connected to the MCU, and when the input module receives a low-level signal as the level signal, it inputs a signal to the second output module, and the second output module outputs the low-level signal to the MCU.

[0009] Further, the first output module comprises,

[0010] The first switch unit is configured to output a low level to the MCU and output a high level to the MCU when the level signal is a high level.

[0011] The first filter unit is connected to the output end of the first switch unit and is configured to remove noise from the output signal.

[0012] The second output module includes,

[0013] The second switch unit is configured to output a high level to the MCU and output a low level to the MCU when the level signal is a low level.

[0014] The second filter unit is connected to the output end of the second switch unit and is configured to remove noise from the output signal.

[0015] The MCU is configured to detect changes in the level signals of the first output module and the second output module.

[0016] Specifically, the first switch unit includes a first MOS tube, a first resistor, a second resistor, a third resistor, and a diode. The source of the first MOS tube is connected to a first power supply, the drain of the first MOS tube is connected to a first end of the third resistor, a second end of the third resistor is connected to the MCU, the gate of the first MOS tube is connected to a first end of the second resistor, a second end of the second resistor is connected to the anode of the diode, and the cathode of the diode receives the level signal of the input module.

[0017] Specifically, the first filter unit includes a fourth resistor and a first capacitor. A first end of the fourth resistor is connected to a second end of the third resistor, and a second end of the fourth resistor is grounded. A first end of the first capacitor is connected to the second end of the third resistor, and a second end of the first capacitor is grounded.

[0018] Specifically, the second switch unit includes a second MOS tube. A first end of the fifth resistor is connected to a second power supply, a second end of the fifth resistor is connected to the drain of the second MOS tube, the source of the second MOS tube is grounded, the drain of the second MOS tube is connected to the MCU, and the gate of the second MOS tube receives the level signal of the input module.

[0019] Specifically, the second filter unit is provided with a second capacitor. A first end of the second capacitor is connected to the second end of the fifth resistor, and a second end of the second capacitor is grounded.

[0020] Specifically, the circuit breaker detection circuit further includes,

[0021] A voltage stabilizing module is connected with the input module at the input end and with the first output module at the output end, and is used for stabilizing the level signal of the input module.

[0022] A filtering module is connected with the output end of the voltage stabilizing module at the input end, and is used for removing the noise of the level signal, and the output end of the filtering module is connected with the second output module.

[0023] Further, the voltage stabilizing module is provided with a voltage stabilizing diode, the positive electrode of the voltage stabilizing diode is connected with the input module, and the negative electrode of the voltage stabilizing diode is grounded.

[0024] Further, the filtering module comprises a third capacitor, a fourth capacitor, a sixth resistor and a seventh resistor, the first end of the third capacitor is connected with the negative electrode of the voltage stabilizing diode, the second end of the third capacitor is grounded, the first end of the sixth resistor is connected with the negative electrode of the voltage stabilizing diode, the second end of the sixth resistor is connected with the first end of the seventh resistor, the second end of the seventh resistor is grounded, and the first end of the seventh resistor and the gate of the second MOS transistor are connected with the first end of the fourth capacitor, and the second end of the fourth capacitor is grounded.

[0025] Specifically, the circuit breaker detection circuit is further provided with a fuse, the first end of the fuse is connected with the input module, and the second end of the fuse is connected with the negative electrode of the voltage stabilizing diode.

[0026] The utility model discloses the advantages are as follows:

[0027] 1, the utility model discloses an input module connects the auxiliary contact of circuit breaker, receives the high level or low level signal in the connection, and the corresponding level signal is exported to MCU through the first output module and the second output module, when the voltage change of corresponding output module is detected, MCU can know that the input of auxiliary contact of circuit breaker is high level or low level, and MCU can monitor the switch state of circuit breaker in real time, provides accurate circuit state feedback, and guarantees the safe operation of system.

[0028] 2, the application can receive two different level signals through an input end, and the high and low of level signal are judged, and the structure is simple.

[0029] 3, the utility model discloses a plurality of filter units, and these filter units remove the noise of output signal, ensure the purity and stability of signal, can effectively eliminate the noise and interference in signal, and improve the reliability and accuracy of detection circuit.

[0030] 4. The voltage stabilizing module in the utility model stabilizes the level signal of the input module through the voltage stabilizing diode, and the filter module further removes the noise in the level signal. In addition, the circuit is also equipped with a fuse, which provides additional protection between the input module and the voltage stabilizing diode, preventing circuit overload and damage. Through these settings, the stability and safety of the entire detection circuit under various working conditions are ensured. BRIEF DESCRIPTION OF DRAWINGS

[0031] In order to more clearly illustrate the technical scheme in the embodiments of the utility model or the prior art, the drawings needed to be used in the embodiment or the prior art description will be briefly introduced below. Obviously, the drawings in the following description are only one embodiment of the utility model, and those skilled in the art can also obtain other drawings according to these drawings without creating labor.

[0032] Wherein the same parts are indicated by the same reference numerals. It should be noted that the words "front", "back", "left", "right", "up" and "down" used in the following description refer to the directions in the drawings, and the words "bottom surface" and "top surface", "inner" and "outer" refer to the directions towards or away from the geometric center of a particular component.

[0033] Figure 1 It is the overall structural diagram of the embodiment of the utility model;

[0034] Figure 2 It is the specific work flow chart in the embodiment of the utility model.

[0035] In the above drawings, the meanings of various reference numerals are as follows:

[0036] 1. Input module;

[0037] 2. First output module; 21. First switch unit; 211. First MOS tube; 212. First resistor; 213. Second resistor; 214. Third resistor; 215. Diode; 22. First filter unit; 221. Fourth resistor; 222. First capacitor;

[0038] 3. Second output module; 31. Second switch unit; 311. Second MOS tube; 312. Fifth resistor; 32. Second filter unit; 321. Second capacitor

[0039] 4. MCU;

[0040] 5. Voltage stabilizing module; 51. Voltage stabilizing diode;

[0041] 6. Filter module; 61. Third capacitor; 62. Fourth capacitor; 63. Sixth resistor; 64. Seventh resistor;

[0042] 7. Fuse. DETAILED DESCRIPTION

[0043] The technical solutions of the present application will be described clearly and completely below in combination with the embodiments of the present application and the drawings. Obviously, the described embodiments are only some of the embodiments of the present application, but not all the embodiments. Based on the embodiments of the present application, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of the present application.

[0044] Unless otherwise defined, all technical and scientific terms used in the present application have the same meaning as commonly understood by one of ordinary skill in the art to which the present application belongs; the terms used in the specific embodiments are only for the purpose of describing the specific embodiments and are not intended to limit the present application; the terms "include" and "have" and any variations thereof in the specification and claims of the present application and the above description of drawings are intended to cover non-exclusive inclusion.

[0045] In the description of the specific embodiments of the present application, the technical terms "first", "second", etc. are only used to distinguish different objects, and cannot be understood as indicating or implying relative importance or implicitly indicating the number, specific order or primary and secondary relationship of the indicated technical features. In the description of the embodiments of the present application, the meaning of "a plurality of" is two or more, unless otherwise explicitly specified.

[0046] In the present application, "embodiment" means that the specific features, structures or properties described in combination with the embodiment can be included in at least one embodiment of the present application. The appearance of this phrase in the specification does not necessarily mean the same embodiment, nor is it an independent or alternative embodiment to other embodiments. Those skilled in the art explicitly and implicitly understand that the embodiments described in the present application can be combined with other embodiments.

[0047] In the description of the embodiments of the present application, the term "and / or" is only a description of the association relationship between the associated objects, which means that there can be three relationships, for example, A and / or B, which can represent the three cases of A alone, A and B together, and B alone. In addition, the character " / " in the present application generally represents a "or" relationship between the front and rear associated objects.

[0048] Throughout this document, numerical values represent approximate measurements or limits to encompass minor deviations from a given value and embodiments having about the noted value and embodiments having the noted exact value. Except in the working examples provided at the end of the detailed description, all numerical values of parameters such as amounts or conditions are to be understood as modified in all instances by the term "about" whether or not "about" actually appears before the numerical value so modified. "About" indicates that the value provided can vary from the stated value by a small amount, to some extent, to approximately, or to reasonably close to, the stated value; approximately or reasonably close to the stated value; nearly. If the inaccuracy provided by "about" is not otherwise understood in the art to have this ordinary meaning, "about" as used in the present document indicates at least the variation that can be produced by ordinary methods of measuring and using such parameters. For example, "about" can include a variation of less than or equal to 5%, optionally less than or equal to 4%, optionally less than or equal to 3%, optionally less than or equal to 2%, optionally less than or equal to 1%, optionally less than or equal to 0.5%, and in certain aspects, optionally less than or equal to 0.1%.

[0049] In addition, the disclosure of ranges includes all values and further divisions of ranges within the range, including the endpoints and subranges given for the ranges.

[0050] Embodiments of the present document will be described more particularly below by way of examples. It is to be noted that the embodiments of the present document are not limited only to these examples.

[0051] Embodiments

[0052] In a specific embodiment, as shown in Figure 1 and Figure 2 A circuit breaker detection circuit includes an input module 1, a first output module 2, a second output module 3 and an MCU 4. The input module 1 is connected to the auxiliary contact of the circuit breaker, used to receive the level signal of the auxiliary contact of the circuit breaker, the first output module 2 is connected with the MCU 4, used to receive the level signal of the input module 1, and output high level to the MCU 4 when the level signal is high level, the second output module 3 is connected with the input module 1 and the MCU 4, used to output low level to the MCU 4 when the level signal is low level, and the MCU 4 is used to monitor the signal output of the first output module 2 and the second output module 3.

[0053] In some specific embodiments, the input module 1 is connected to the first output module 2, the first output module 2 is connected to the MCU 4, the input module 1 receives a high-level signal and inputs the first output module 2, the first output module 2 outputs a high-level signal to the MCU 4, the input module 1 is connected to the second output module 3, the second output module 3 is connected to the MCU 4, the input module 1 receives a low-level signal and inputs the second output module 3, and the second output module 3 outputs a low-level signal to the MCU 4.

[0054] Through the above setting, when the circuit breaker is closed, a high level is input to the input module 1, the first output module 2 can output a high level to the MCU 4 according to the high level signal, and the MCU 4 can know that the current circuit breaker is in a closed state according to the output of the first output module 2. When the circuit breaker is open, a low level is input to the input module 1, the second output module 3 can output a low level to the MCU 4 according to the low level signal, and the MCU 4 can know that the current circuit breaker is in an open state according to the output of the second output module 3. The above setting can detect the switch state of the circuit breaker.

[0055] In the embodiment, the first output module 2 includes a first switching unit 21 and a first filter unit 22, the first switching unit 21 is connected to the first filter unit 22, the first switching unit 21 receives a high-level signal and inputs the first filter unit 22, the first filter unit 22 processes the high-level signal and then inputs the MCU 4. The second output module 3 includes a second switching unit 31 and a second filter unit 32, the second switching unit 31 is connected to the second filter unit 32, the second switching unit 31 receives a low-level signal and inputs the second filter unit 32, the second filter unit 32 processes the low-level signal and then inputs the MCU 4. The first switching unit 21 is used to output a low level to the MCU 4 and output a high level to the MCU 4 when the level signal is a high level, the first filter unit 22 is connected to the output end of the first switching unit 21 and is used to remove noise from the output signal. The second switching unit 31 is used to output a high level to the MCU 4 and output a low level to the MCU 4 when the level signal is a low level, the second filter unit 32 is connected to the output end of the second switching unit 31 and is used to remove noise from the output signal. The MCU 4 is used to detect the level signal changes of the first output module 2 and the second output module 3.

[0056] Through the above setting, the MCU 4 judges the switch state of the circuit breaker according to the signal changes of the first output module 2 and the second output module 3. Specifically, when it is detected that the first output module 2 changes from a low level to a high level, it indicates that the circuit breaker is closed, and when it is detected that the second output module 3 changes from a high level to a low level, it indicates that the circuit breaker is open.

[0057] In some specific embodiments, the first switch unit 21 comprises a first MOS tube 211, a first resistor 212, a second resistor 213, a third resistor 214 and a diode 215, the source of the first MOS tube 211 is connected with the first power supply, the drain of the first MOS tube 211 is connected with the first end of the third resistor 214, the second end of the third resistor 214 is connected with the MCU 4, the gate of the first MOS tube 211 is connected with the first end of the second resistor 213, the second end of the second resistor 213 is connected with the positive electrode of the diode 215, and the negative electrode of the diode 215 receives the level signal of the input module 1.

[0058] Through the above setting, the initial state of the first MOS tube 211 is the off state, so that the first output module 2 outputs low level to the MCU 4; when the input module 1 is connected with high level, the first MOS tube 211 is turned on, so that the first output module 2 outputs high level to the MCU 4.

[0059] In some specific embodiments, the first filter unit 22 comprises a fourth resistor 221 and a first capacitor 222, the first end of the fourth resistor 221 is connected with the second end of the third resistor 214, and the second end of the fourth resistor 221 is grounded; the first end of the first capacitor 222 is connected with the second end of the third resistor 214, and the second end of the first capacitor 222 is grounded.

[0060] In some specific embodiments, the second switch unit 31 comprises a second MOS tube 311, the first end of a fifth resistor 312 is connected with the second power supply, the second end of the fifth resistor 312 is connected with the drain of the second MOS tube 311, the source of the second MOS tube 311 is grounded, the drain of the second MOS tube 311 is connected with the MCU 4, and the gate of the second MOS tube 311 receives the level signal of the input module 1.

[0061] Through the above setting, the initial state of the second MOS tube 311 is the off state, so that the second output module 3 outputs high level to the MCU 4; when the input module 1 is connected with low level, the second MOS tube 311 is turned on, so that the second output module 3 outputs low level to the MCU 4.

[0062] In some specific embodiments, the second filter unit 32 is provided with a second capacitor 321, the first end of the second capacitor 321 is connected with the second end of the fifth resistor 312, and the second end of the second capacitor 321 is grounded. The second power supply and the fifth resistor 312 cooperate to remove the noise of the output signal.

[0063] In the embodiment, the circuit for detecting the circuit breaker further comprises a voltage stabilizing module 5 and a filtering module 6, the input module 1 is connected to the voltage stabilizing module 5, the voltage stabilizing module 5 is connected to the first output module 2 and the filtering module 6, and the filtering module 6 is connected to the second output module 3. The input end of the voltage stabilizing module 5 is connected to the input module 1, and the output end of the voltage stabilizing module 5 is connected to the first output module 2, so as to stabilize the level signal of the input module 1. The input end of the filtering module 6 is connected to the output end of the voltage stabilizing module 5, so as to remove the noise of the level signal.

[0064] In some specific embodiments, the voltage stabilizing module 5 is provided with a voltage stabilizing diode 51, the input module 1 is connected to the positive electrode of the voltage stabilizing diode 51, and the negative electrode of the voltage stabilizing diode 51 is grounded.

[0065] In some specific embodiments, the filtering module 6 comprises a third capacitor 61, a fourth capacitor 62, a sixth resistor 63 and a seventh resistor 64. The first end of the third capacitor 61 is connected to the negative electrode of the voltage stabilizing diode 51, the second end of the third capacitor 61 is grounded, the first end of the sixth resistor 63 is connected to the negative electrode of the voltage stabilizing diode 51, the second end of the sixth resistor 63 is connected to the first end of the seventh resistor 64, the second end of the seventh resistor 64 is grounded, and the first end of the seventh resistor 64 and the gate of the second MOS tube 311 are connected to the first end of the fourth capacitor 62, and the second end of the fourth capacitor 62 is grounded.

[0066] In the embodiment, the circuit for detecting the circuit breaker further comprises a fuse 7, the first end of the fuse 7 is connected to the input module 1, and the second end of the fuse 7 is connected to the negative electrode of the voltage stabilizing diode 51.

[0067] It should be noted that the above only describes the preferred embodiments of the present application and should not be used to limit the present application. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application should be included in the protection scope of the present application.

Claims

1. A circuit breaker detection circuit, characterized by, The input module, the first output module, the second output module, the MCU are included; The input module is connected with the auxiliary contact of the circuit breaker, and is used for receiving the level signal of the auxiliary contact of the circuit breaker; The input module is connected with the first output module, the first output module is connected with the MCU, when the input module receives the high level signal of the level signal, the input module inputs the signal to the first output module, and the first output module outputs the high level signal to the MCU; The input module is connected with the second output module, the second output module is connected with the MCU, when the input module receives the low level signal of the level signal, the input module inputs the signal to the second output module, and the second output module outputs the low level signal to the MCU.

2. The circuit breaker detection circuit according to claim 1, wherein the first output module comprises: The first switch unit is used for outputting the low level to the MCU, and outputting the high level to the MCU when the level signal is high level; The first filter unit is connected with the output end of the first switch unit, and is used for removing the noise of the output signal; The second output module comprises: The second switch unit is used for outputting the high level to the MCU, and outputting the low level to the MCU when the level signal is low level; The second filter unit is connected with the output end of the second switch unit, and is used for removing the noise of the output signal; The MCU is used for detecting the level signal change of the first output module and the second output module. The first switch unit comprises a first MOS tube, a first resistor, a second resistor, a third resistor and a diode; 3. The circuit breaker detection circuit of claim 2, wherein, The source of the first MOS tube is connected with the first power supply, the drain of the first MOS tube is connected with the first end of the third resistor, the second end of the third resistor is connected with the MCU, the gate of the first MOS tube is connected with the first end of the second resistor, the second end of the second resistor is connected with the anode of the diode, and the cathode of the diode receives the level signal of the input module. The first filter unit comprises a fourth resistor and a first capacitor, the first end of the fourth resistor is connected with the second end of the third resistor, the second end of the fourth resistor is grounded, the first end of the first capacitor is connected with the second end of the third resistor, and the second end of the first capacitor is grounded.

4. The circuit breaker detection circuit of claim 3, wherein, The second switch unit comprises a second MOS tube and a fifth resistor, the first end of the fifth resistor is connected with the second power supply, the second end of the fifth resistor is connected with the drain of the second MOS tube, the source of the second MOS tube is grounded, the drain of the second MOS tube is connected with the MCU, and the gate of the second MOS tube receives the level signal of the input module.

5. The circuit breaker detection circuit of claim 4, wherein, The second filter unit is provided with a second capacitor, the first end of the second capacitor is connected with the second end of the fifth resistor, and the second end of the second capacitor is grounded.

6. The circuit breaker detection circuit of claim 5, wherein, Further comprising:

7. The circuit breaker detection circuit of claim 5, wherein, The voltage stabilizing module is connected with the input module at the input end, and is connected with the first output module at the output end, and is used for stabilizing the level signal of the input module. ​ A filter module is connected with the output end of the voltage stabilizing module and used for removing noise of the level signal, and an output end of the filter module is connected with the second output module.

8. The circuit breaker detection circuit of claim 7, wherein, The voltage stabilizing module is provided with a voltage stabilizing diode, a positive electrode of the voltage stabilizing diode is connected with the input module, and a negative electrode of the voltage stabilizing diode is grounded.

9. The circuit breaker detection circuit of claim 8, wherein, The filter module comprises a third capacitor, a fourth capacitor, a sixth resistor and a seventh resistor, a first end of the third capacitor is connected with the negative electrode of the voltage stabilizing diode, a second end of the third capacitor is grounded, a first end of the sixth resistor is connected with the negative electrode of the voltage stabilizing diode, a second end of the sixth resistor is connected with a first end of the seventh resistor, a second end of the seventh resistor is grounded, a first end of the seventh resistor is connected with the gate of the second MOS tube, and a second end of the fourth capacitor is grounded.

10. The circuit breaker detection circuit of claim 8, wherein, The circuit breaker detection circuit is further provided with a fuse, a first end of the fuse is connected with the input module, and a second end of the fuse is connected with the negative electrode of the voltage stabilizing diode.

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