Integrated circuit protection device and circuit protection system
By integrating a signal fuse and separable components into an integrated circuit protection device, the coordinated interruption of the contactor and fuse is achieved, solving the problems of large DC short-circuit current and difficulty in extinguishing the arc in new energy systems, and improving the reliability and rapid response capability of circuit protection.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2026-03-20
- Publication Date
- 2026-05-15
AI Technical Summary
Existing high-voltage circuit protection methods suffer from protection failures or false protection in new energy systems, especially when the DC short-circuit current is large and the arc is difficult to extinguish. The combination of traditional contactors and fuses is difficult to achieve reliable circuit protection.
An integrated circuit protection device is adopted, which includes a contactor module and a fuse module. By integrating a signal fuse and a separable component in the contactor module, the contactor and fuse can be disconnected in a coordinated manner. The signal fuse melts first to supply power to the fuse in case of a fault, and the contactor module trips after the fault, forming a double-break protection.
It improves the reliability protection of high-voltage circuits under various fault conditions, ensures rapid fault disconnection during normal overload, and rapid fuse response during short circuit, avoiding the protection failure and false protection of traditional methods.
Smart Images
Figure CN122051093A_ABST
Abstract
Description
Technical Field
[0001] This application relates to the field of high-voltage circuit protection technology, and more specifically, to an integrated circuit protection device and circuit protection system. Background Technology
[0002] High-voltage systems for new energy sources (such as the 800V platform for electric vehicles) have significantly improved charging efficiency and energy efficiency, but they also face severe challenges such as large DC short-circuit current and difficulty in extinguishing electric arcs.
[0003] Currently, high-voltage circuit protection for new energy systems is typically achieved using a combination of contactors and fuses. In case of overload, circuit protection is implemented by controlling the contactor to disconnect the circuit, and in case of short circuit, circuit protection is implemented by controlling the fuse to disconnect the circuit.
[0004] The above methods may lead to protection failure or false protection, resulting in poor reliability of circuit protection. Summary of the Invention
[0005] The purpose of this application is to address the shortcomings of the prior art by providing an integrated circuit protection device and circuit protection system to improve the reliability of high-voltage circuit protection.
[0006] To achieve the above objectives, the technical solutions adopted in the embodiments of this application are as follows: In a first aspect, embodiments of this application provide an integrated circuit protection device, including: a contactor module and a fuse module; the contactor module includes: a first contact assembly, a second contact assembly, a signal fuse, a switching drive module, a first separable component, and a second separable component; the first contact assembly and the second contact assembly respectively include a stationary contact and a moving contact; One end of the first contact assembly and one end of the second contact assembly are connected in series to the main circuit; One end of the signal fusible link is connected to the other end of the first contact assembly, and the other end of the signal fusible link is connected to the other end of the second contact assembly; One end of the first separable component and one end of the second separable component are connected to the fuse module, the other end of the first separable component is connected to the other end of the first contact assembly, and the other end of the second separable component is connected to the other end of the second contact assembly. The opening and closing drive module is used to drive the stationary and moving contacts in the first contact assembly and the second contact assembly to open and close the circuit under the control signal sent by the control device. The first separable component is used to connect to the fuse module when the first contact assembly is closed, and to disconnect from the fuse module when the first contact assembly is open; The signal fuse is used to melt when the current signal of the main circuit meets the melting condition, so as to supply power to the fuse module and enable the fuse module to cut off the main circuit.
[0007] Optionally, the split-opening drive module includes: an action control coil, a control circuit, and a magnetic drive mechanism; the magnetic drive mechanism is disposed between the action control coils; the action control coils are connected to the control device through the control circuit. The control circuit is used to energize or de-energize the action control coil under the drive of the control signal sent by the control device; When the action control coil is energized, the action control coil drives the magnetic drive mechanism to close the stationary and moving contacts in the first and second contact assemblies to conduct the main circuit; when the action control coil is de-energized, the action control coil drives the magnetic drive mechanism to open the stationary and moving contacts in the first and second contact assemblies to disconnect the main circuit.
[0008] Optionally, the control signal includes: a power-off signal; When the control device detects that the current signal of the main circuit is greater than a first threshold and less than a second threshold, it sends the power-off signal to the control circuit. Alternatively, when the control device detects that the current signal of the main circuit is greater than the second threshold, it sends the power-off signal to the control circuit.
[0009] Optionally, the magnetic drive mechanism includes: an iron core, a spring, a drive shaft, and a support member; The two support rods of the support member respectively support the other end of the first contact assembly and the other end of the second contact assembly; The iron cores attract each other after the action control coil is energized to drive the spring to compress, thereby driving the support member through the drive shaft to drive the moving contact in the first contact assembly to the closed position and the moving contact in the second contact assembly to the closed position. When the action control coil is de-energized, the spring rebounds to drive the iron cores to separate from each other, thereby driving the support member through the drive shaft to pull the moving contact in the first contact assembly back to the open position and the moving contact in the second contact assembly back to the open position.
[0010] Optionally, the first separable component includes: a fixed component and a movable component; The fixed component is fixedly connected to the fuse module, and one end of the movable component is connected to one end of the moving contact of the first contact component; The other end of the active component faces the fixed component; When the first contact assembly is closed, the movable component of the first separable component is driven to move toward the fixed component and contact the fixed component, thereby the first separable component turns on the fuse module. When the first contact assembly is tripped, the movable component of the first separable component moves away from the fixed component and separates from the fixed component, thereby disconnecting the fuse module.
[0011] Optionally, the fuse module includes: a trigger circuit, an excitation source, and an actuator; the actuator is disposed opposite to the main circuit, and the trigger circuit excites the actuator to perform an action to cut off the main circuit through the excitation source.
[0012] Optionally, the signal melt is specifically used to melt and generate an arc voltage when the current signal of the main circuit is detected to be greater than the second threshold, and to supply power to the excitation source to trigger the excitation source to act, thereby driving the actuator to cut off the main circuit.
[0013] Optionally, the device further includes: an arc-extinguishing module; the arc-extinguishing module includes an arc-extinguishing fuse; The arc-extinguishing fuse is connected in parallel to the main circuit; The arc-extinguishing fuse melts based on the fault current flowing through it after the fuse module cuts off the main circuit, thereby extinguishing the arc.
[0014] Optionally, when the current signal of the main circuit is greater than the second threshold, the melting time of the signal fusible element is earlier than the time when the moving contact in the first contact assembly and the second contact assembly is electrodynamically repelled.
[0015] Secondly, embodiments of this application also provide a circuit protection system, including the integrated circuit protection device, the device to be protected, and the control device described in the first aspect above; The integrated circuit protection device is connected to the control device, and the integrated circuit protection device is connected in series in the main circuit of the device to be protected.
[0016] The beneficial effects of this application are: This application provides an integrated circuit protection device and system. The device includes a contactor module and a fuse module. The contactor module includes a first contact assembly, a second contact assembly, a signal fuse, a switching drive module, a first separable component, and a second separable component. The first and second contact assemblies each include a stationary contact and a moving contact. One end of the first and second contact assemblies are connected in series to the main circuit. One end of the signal fuse is connected to the other end of the first contact assembly, and the other end of the signal fuse is connected to the other end of the second contact assembly. One end of the first and second separable components is connected to the fuse module. The other end of the first separable component is connected to the other end of the first contact component, and the other end of the second separable component is connected to the other end of the second contact component; the opening and closing drive module is used to drive the stationary and moving contacts in the first contact component and the second contact component to open and close under the control signal sent by the control device; the first separable component is used to conduct the connection with the fuse module when the first contact component is closed, and to disconnect the connection with the fuse module when the first contact component is open; the signal fuse element is used to fuse when the current signal of the main circuit meets the fusing condition, so as to supply power to the fuse module and enable the fuse module to cut off the main circuit. This device integrates a signal fuse and a separable component into the contactor module. The separable component is mechanically linked to the moving contact in the contactor module. When the contactor module is closed, the separable component conducts the fuse module; when the contactor module is open, the separable component disconnects the fuse module. Thus, under normal overload conditions, the contactor can quickly disconnect the fault by opening the circuit, and the fuse module is disconnected by the separable component, so the fuse module does not work. However, under abnormal overload conditions such as contactor welding or control equipment failure, the separable component conducts the fuse module because the contactor is not open. The signal fuse melts due to long-term heat accumulation, supplying power to the fuse module and triggering the fuse module to quickly disconnect the fault. Under short-circuit conditions, because the signal fuse melts earlier than the contactor module is controlled to open, the signal fuse melts first and triggers the fuse module to quickly disconnect the fault. Afterward, the contactor module is disconnected and opened, thus achieving coordinated disconnection of the fuse module and the contactor module at dual points. This device can provide reliable circuit protection under various fault conditions.
[0017] The system includes: an integrated circuit protection device, the device to be protected, and a control device; the integrated circuit protection device and the control device are connected via a control loop, and the integrated circuit protection device is connected in series in the main circuit of the device to be protected. Based on this system, reliable protection of the device to be protected can be achieved. Attached Figure Description
[0018] To more clearly illustrate the technical solutions of the embodiments of this application, the accompanying drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this application and should not be regarded as a limitation of the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.
[0019] Figure 1 A schematic diagram of an integrated circuit protection device provided in an embodiment of this application; Figure 2 A schematic diagram of another integrated circuit protection device provided in an embodiment of this application; Figure 3 A partial structural diagram of a contactor module provided in an embodiment of this application; Figure 4 This is a complete structural diagram of a contactor module provided in an embodiment of this application; Figure 5 A schematic diagram of the opening and closing states of a contactor module provided in an embodiment of this application; Figure 6 A complete structural schematic diagram of yet another integrated circuit protection device provided in this application embodiment; Figure 7 This is a schematic diagram of a circuit protection system provided in an embodiment of this application. Detailed Implementation
[0020] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. It should be understood that the accompanying drawings in this application are for illustrative and descriptive purposes only and are not intended to limit the scope of protection of this application. Furthermore, it should be understood that the schematic drawings are not drawn to scale. The flowcharts used in this application illustrate operations implemented according to some embodiments of this application. It should be understood that the operations in the flowcharts may not be implemented in sequence, and steps without logical contextual relationships may be reversed or implemented simultaneously. In addition, those skilled in the art, guided by the content of this application, may add one or more other operations to the flowcharts, or remove one or more operations from the flowcharts.
[0021] Furthermore, the described embodiments are merely some, not all, of the embodiments of this application. The components of the embodiments of this application described and illustrated herein can typically be arranged and designed in various different configurations. Therefore, the following detailed description of the embodiments of this application provided in the accompanying drawings is not intended to limit the scope of the claimed application, but merely to illustrate selected embodiments of the application. All other embodiments obtained by those skilled in the art based on the embodiments of this application without inventive effort are within the scope of protection of this application.
[0022] It should be noted that the term "comprising" will be used in the embodiments of this application to indicate the presence of the features declared thereafter, but does not exclude the addition of other features.
[0023] High-voltage systems in new energy sources (such as the 800V platform for electric vehicles) face severe challenges due to large DC short-circuit currents and difficulty in extinguishing electric arcs. Currently, protection for new energy systems typically employs a contactor + fuse approach, with the technology primarily relying on: Battery Management System (BMS) software protection: controls the contactor to disconnect after detecting overcurrent. However, both software detection and contactor action have millisecond-level delays, making it unable to handle short-circuit faults that develop in microseconds, such as direct breakdown.
[0024] Traditional fuses have limited breaking capacity and cannot be linked to the status of the contactor, so they may accidentally blow when the contactor is breaking normally.
[0025] The above method has the following drawbacks: No backup protection when the BMS fails: If the BMS malfunctions or the contactor jams, the system completely loses protection. Contactor contact welding: The DC short-circuit current rises extremely rapidly, and the contactor contacts are easily dislodged and welded together, leading to high-voltage interlock failure, power-off failure, and extreme danger.
[0026] The integrated circuit protection device provided in this application is mainly used for high-voltage circuit protection of battery packs, motor drive systems or DC side of photovoltaic inverters. This device can be combined with BMS intelligent control to achieve circuit collaborative protection.
[0027] Figure 1 This is a schematic diagram of an integrated circuit protection device provided in an embodiment of this application; as shown. Figure 1As shown, the device may include a contactor module and a fuse module. The contactor module can be triggered to disconnect during low-current faults, such as normal overload conditions, to cut off the fault current in the main circuit. The fuse module can be preferentially triggered to blow and cut off the main circuit during high-current faults, such as short-circuit conditions. Subsequently, as the fault current slowly decreases, the contactor module is triggered to disconnect, forming a coordinated disconnection of the fuse and contactor at both points. Under failure overload conditions, such as contactor contact welding or BMS failure, the fuse module is triggered to blow and cut off the main circuit.
[0028] The contactor module includes: a first contact assembly, a second contact assembly, a signal fuse, a switching drive module, a first separable component, and a second separable component; the first contact assembly and the second contact assembly respectively include a stationary contact and a moving contact; one end of the first contact assembly and one end of the second contact assembly are connected in series to the main circuit; one end of the signal fuse is connected to the other end of the first contact assembly, and the other end of the signal fuse is connected to the other end of the second contact assembly.
[0029] Both the first contact assembly and the second contact assembly include stationary contacts and moving contacts. The stationary contacts are connected in series to the main circuit. The signal fuse is connected between the two moving contacts. The signal fuse will automatically melt after reaching the melting condition, or it will melt due to long-term heat accumulation.
[0030] The opening and closing drive module is used to drive the stationary and moving contacts in the first contact assembly and the second contact assembly to open and close the circuit under the control signal sent by the control device.
[0031] The control device can refer to the BMS mentioned above. The BMS can process and judge the signal based on the current signal of the main circuit sent by the sensor. When the current signal meets the normal operating conditions, it sends out the corresponding control signal to control the opening and closing drive module to drive the first contact assembly and the second contact assembly to close, so that the main circuit is normally connected. When the current signal reaches the fault protection conditions, it sends out the corresponding control signal to control the opening and closing drive module to drive the first contact assembly and the second contact assembly to open, so as to quickly disconnect the main circuit.
[0032] The opening of the first contact assembly means that the moving contact in the first contact assembly is in the open position, and the moving contact and the stationary contact are separated; conversely, the closing of the first contact assembly means that the moving contact in the first contact assembly is in the closed position, and the moving contact and the stationary contact are in contact and closed. The opening and closing of the second contact assembly is similar to that of the first contact assembly.
[0033] One end of the first separable component and the second separable component are connected to the fuse module, the other end of the first separable component is connected to the other end of the first contact component, and the other end of the second separable component is connected to the other end of the second contact component.
[0034] One end of both the first and second separable components is connected to the fuse module to turn the fuse module on or off, similar to the function of a switch. The other end of the first separable component is connected to the other end of the first contact assembly, thus enabling mechanical linkage when the first contact assembly is activated; the other end of the second separable component is connected to the other end of the second contact assembly, thus enabling mechanical linkage when the second contact assembly is activated.
[0035] The first separable component is used to connect to the fuse module when the first contact assembly is closed, and to disconnect from the fuse module when the first contact assembly is open.
[0036] When the first contact assembly is in the closed state, the first separable component is turned on, thereby turning on the fuse module connected to it; conversely, when the first contact assembly is in the open state, the first separable component is turned off, thereby turning off the fuse module connected to it.
[0037] The signal fuse is used to blow the fuse when the current signal of the main circuit meets the blowing condition, so as to supply power to the fuse module and enable the fuse module to cut off the main circuit.
[0038] In this embodiment, the signal fuse melts earlier than the contactor module breaks. When the signal fuse melts, the first contact assembly and the second contact assembly in the contactor module are still in the closed state. At this time, the first separable assembly and the second separable assembly conduct the fuse module. The arc voltage generated by the melting of the signal fuse flows into the fuse module to supply power to the fuse module, thereby triggering the fuse module to operate and cut off the main circuit.
[0039] In summary, the integrated circuit protection device provided in this embodiment includes: a contactor module and a fuse module; the contactor module includes: a first contact assembly, a second contact assembly, a signal fuse, a switching drive module, a first separable component, and a second separable component; the first contact assembly and the second contact assembly respectively include a stationary contact and a moving contact; one end of the first contact assembly and one end of the second contact assembly are connected in series to the main circuit; one end of the signal fuse is connected to the other end of the first contact assembly, and the other end of the signal fuse is connected to the other end of the second contact assembly; one end of the first separable component and one end of the second separable component are connected to the fuse module, and the first separable component... The other end of the separating component is connected to the other end of the first contact component, and the other end of the second separable component is connected to the other end of the second contact component; the opening and closing drive module is used to drive the stationary and moving contacts in the first contact component and the second contact component to open and close under the control signal sent by the control device; the first separable component is used to conduct the connection with the fuse module when the first contact component is closed, and to disconnect the connection with the fuse module when the first contact component is open; the signal fuse element is used to fuse when the current signal of the main circuit meets the fusing condition, so as to supply power to the fuse module and enable the fuse module to cut off the main circuit. This device integrates a signal fuse and a separable component into the contactor module. Under overload conditions, the opening and closing drive module can drive the contactor module to open according to the control signal to quickly cut off the fault current. At this time, the separable component is disconnected, and the fuse module does not work. Under short-circuit conditions, the signal fuse blows first, and the voltage generated by the fuse blow can supply power to the fuse module. At the same time, the contactor module is in the closed state, and the separable component turns the fuse module on. Thus, the voltage generated by the blown signal fuse drives the fuse module to work and quickly cut off the fault current. Afterward, the contactor module completes the opening and closing drive module, realizing the coordinated disconnection of the fuse module and the contactor module, and improving the reliability of fault protection under various operating conditions.
[0040] Figure 2 A schematic diagram of another integrated circuit protection device provided in the embodiments of this application is shown below. Figure 2 As shown, the split-open drive module includes: an action control coil, a control circuit, and a magnetic drive mechanism; the magnetic drive mechanism is located between the action control coils; the action control coils are connected to the control device through the control circuit; the control circuit is used to energize or de-energize the action control coils under the drive of the control signal sent by the control device.
[0041] The control device can receive the current signal of the main circuit generated by the sensor and perform current analysis and judgment. Under normal current conditions, the control device can send a power-on control signal to the control circuit so that the control circuit can energize the action control coil. When a fault current is detected, the control device can send a power-off control signal to the control circuit so that the control circuit can de-energize the action control coil.
[0042] When the action control coil is energized, the action control coil drives the magnetic drive mechanism to close the stationary and moving contacts in the first and second contact assemblies to conduct the main circuit; when the action control coil is de-energized, the action control coil drives the magnetic drive mechanism to open the stationary and moving contacts in the first and second contact assemblies to disconnect the main circuit.
[0043] When the motion control coil is energized, it generates a magnetic field, which drives the magnetic drive mechanism to move and close the first contact assembly and the second contact assembly. When the first contact assembly and the second contact assembly are closed, the main circuit is turned on, and the current in the main circuit flows through the stationary contact of the first contact assembly, the moving contact, the signal fuse, the moving contact of the second contact assembly, and the stationary contact.
[0044] When the action control coil is de-energized, the magnetic field disappears, thereby driving the magnetic drive mechanism to move and open the first contact assembly and the second contact assembly. When the first contact assembly and the second contact assembly are opened, the main circuit is disconnected and the fault current is cut off.
[0045] Optionally, the control signal includes: a power-off signal; wherein, when the control device detects that the current signal of the main circuit is greater than a first threshold and less than a second threshold, it sends a power-off signal to the control circuit; or, when the control device detects that the current signal of the main circuit is greater than the second threshold, it sends a power-off signal to the control circuit.
[0046] In one implementation, when the control device detects that the current signal of the main circuit is greater than the first threshold and less than the second threshold, it can be determined as an overload. At this time, if it is determined that the contactor module has not experienced contact welding, which is a normal overload condition, the control device sends a power-off signal to the control circuit to drive the contactor module to open and cut off the fault current of the main circuit.
[0047] The first threshold can be 1.5 times the rated current, and the second threshold can be the short-circuit threshold.
[0048] In another implementation, when the control device detects that the current signal of the main circuit is greater than the second threshold, it can be determined as a short circuit condition and a power-off signal is sent to the control circuit to drive the contactor module to trip.
[0049] Optionally, when the current signal of the main circuit is greater than the second threshold, the melting time of the signal fuse is earlier than the time when the moving contact in the first contact assembly and the second contact assembly is electrodynamically repelled.
[0050] It is worth noting that in this application, when the current signal of the main circuit is greater than the second threshold, the melting time of the signal fuse is defined to be earlier than the time when the moving contact in the first contact assembly and the second contact assembly is electrically repelled. Therefore, under short-circuit conditions, the signal fuse will preferentially and rapidly melt due to the large current, generating an arc voltage. Because there is a delay in the process from monitoring the fault current to analyzing, judging, and sending the control signal, the contactor module is still in the closed state when the signal fuse melts. At this time, the first and second separable components turn on the fuse module, and the arc voltage generated by the signal fuse supplies power to the fuse module, triggering the fuse module to quickly melt and cut off the fault current in the main circuit. Afterwards, upon receiving the power-off control signal from the control equipment, the control circuit of the contactor module drives the opening and closing drive module to open the first and second contact assemblies of the contactor module, forming a coordinated disconnection of the fuse module and the contactor module at both break points.
[0051] In some cases, when the control equipment fails or the contacts of the contactor module are welded together, the contactor module may not be able to trip in time. In this case, the signal fuse will melt due to long-term heat accumulation, thereby triggering the fuse module to perform fault disconnection.
[0052] This device can provide reliable circuit protection under various fault conditions.
[0053] Figure 3 This is a partial structural diagram of a contactor module provided in an embodiment of this application; as shown... Figure 3 As shown, the magnetic drive mechanism includes: an iron core, a spring, a drive shaft, and a support member; the two support rods of the support member respectively support the other end of the first contact assembly and the other end of the second contact assembly.
[0054] Specifically, the support may include two support rods, one of which supports one end of the moving contact in the first contact assembly, and the other support rod supports one end of the moving contact in the second contact assembly.
[0055] After the action control coil is energized, the iron cores attract each other to drive the spring to compress, thereby driving the support member through the drive shaft to drive the moving contact in the first contact assembly to the closed position and the moving contact in the second contact assembly to the closed position.
[0056] When the action control coil is energized, the iron cores attract each other, which compresses the spring upward, causing the drive shaft to move upward. During the upward movement of the drive shaft, the support rod moves upward, thereby driving the moving contact in the first contact assembly to the closed position, so that the moving contact and the stationary contact make contact and close, thus completing the closing of the first contact assembly. At the same time, the moving contact in the second contact assembly is driven to the closed position, so that the moving contact and the stationary contact make contact and close, thus completing the closing of the second contact assembly.
[0057] When the action control coil is de-energized, the spring rebounds to drive the iron cores to separate from each other, thereby driving the support member through the drive shaft to pull the moving contact in the first contact assembly back to the open position and the moving contact in the second contact assembly back to the open position.
[0058] After the action control coil is de-energized, the spring rebounds and resets, thereby separating the iron cores from each other. This drives the drive shaft to pull the support rod downward, pulling the moving contact in the first contact assembly to the open position, so that the moving contact and the stationary contact are separated, thus completing the opening of the first contact assembly. At the same time, the moving contact in the second contact assembly is pulled to the open position, so that the moving contact and the stationary contact are separated, thus completing the opening of the second contact assembly.
[0059] Figure 4 This is a complete structural schematic diagram of a contactor module provided in an embodiment of this application; as shown below. Figure 4 As shown, the first separable component includes a fixed component and a movable component; the fixed component can be the contact spring shown in the figure, and the movable component can be the conductive rod shown in the figure.
[0060] The fixed component is fixedly connected to the fuse module, one end of the movable component is connected to one end of the moving contact of the first contact component, and the other end of the movable component faces the fixed component.
[0061] The fixed component is fixedly connected to the fuse module and will not move under the action of other components; one end of the movable component is set towards the fixed component, and the other end of the movable component is connected to one end of the moving contact in the first contact assembly, thereby connecting the signal fuse, the moving contact and the first separable component to each other.
[0062] When the first contact assembly is closed, the movable component of the first separable component is driven to move toward the fixed component and make contact with the fixed component, thereby turning on the fuse module.
[0063] Since one end of the movable component of the first separable component is connected to one end of the moving contact in the first contact component, when the first contact component is closed, the moving contact in the first contact component will move upward. During the upward movement of the moving contact, it can drive the movable component of the first separable component to move toward the fixed component and make contact with the fixed component, thereby turning on the fuse module.
[0064] When the first contact assembly is tripped, the movable component of the first separable component moves away from the fixed component and separates from the fixed component, thereby disconnecting the fuse module.
[0065] When the first contact assembly is closed, the moving contact in the first contact assembly will move downward. During the downward movement of the moving contact, it can drive the movable component of the first separable component away from the fixed component and separate from the fixed component, thereby disconnecting the fuse module.
[0066] The connection relationship and movement process of the second separable component can be understood by referring to the first separable component.
[0067] Figure 5 This application provides a schematic diagram of the opening and closing states of a contactor module according to an embodiment of the present application; as shown below. Figure 5 In the diagram, 'a' represents the contactor module in the open state. At this state, the moving and stationary contacts in the first and second contact assemblies are separated, and the first and second separable components are also separated. Figure 5 In the diagram, b represents the contactor module in the closed state. At this time, the moving and stationary contacts in the first and second contact assemblies are in contact with each other, and the first and second separable components are also in contact with each other.
[0068] By incorporating a first separable component and a second separable component, this application prevents the arc voltage generated between the moving and stationary contacts from conducting the fuse module during contactor module tripping, thereby effectively preventing false triggering of the fuse module. This is because under normal overload conditions, the contactor module alone is sufficient for rapid fault disconnection, and fuse module activation is not expected.
[0069] Figure 6 A complete structural schematic diagram of another integrated circuit protection device provided in the embodiments of this application; as shown Figure 6 As shown, the fuse module includes: a trigger circuit, an excitation source, and an actuator; the actuator is positioned opposite to the main circuit, and the trigger circuit excites the actuator through the excitation source to cut off the main circuit.
[0070] When the first separable component and the second separable component are connected to the fuse module, the arc voltage generated by the melting of the signal fuse can power the excitation source in the fuse module. The trigger circuit sends an excitation signal to the excitation source according to the voltage generated by the melting of the signal fuse to trigger the excitation source to act, thereby driving the actuator to move downward to cut off the main circuit.
[0071] Optionally, the signal fuse is specifically used to melt and generate an arc voltage when the current signal of the main circuit is detected to be greater than the second threshold, and to supply power to the excitation source to trigger the excitation source to act, thereby driving the actuator to cut off the main circuit.
[0072] Specifically, when the signal melt detects that the current signal flowing through it is greater than the second threshold, it will automatically melt and generate an arc voltage to power the excitation source.
[0073] Continue as Figure 6 As shown, the device also includes: an arc extinguishing module; the arc extinguishing module includes an arc extinguishing fuse; the arc extinguishing fuse is connected in parallel on the main circuit; after the fuse module cuts off the main circuit, the arc extinguishing fuse melts based on the fault current flowing through it to extinguish the arc.
[0074] In some embodiments, the protection device may further include an arc extinguishing module, wherein the arc extinguishing fuse in the arc extinguishing module is connected in parallel to the main circuit. When the fuse module cuts off the main circuit, the fault current will be transferred to the arc extinguishing module. After the fault current flows through the arc extinguishing fuse, it will melt the arc extinguishing fuse, thereby extinguishing the arc generated when the main circuit is disconnected.
[0075] In summary, the integrated circuit protection device provided in this embodiment includes: a contactor module and a fuse module; the contactor module includes: a first contact assembly, a second contact assembly, a signal fuse, a switching drive module, a first separable component, and a second separable component; the first contact assembly and the second contact assembly respectively include a stationary contact and a moving contact; one end of the first contact assembly and one end of the second contact assembly are connected in series to the main circuit; one end of the signal fuse is connected to the other end of the first contact assembly, and the other end of the signal fuse is connected to the other end of the second contact assembly; one end of the first separable component and one end of the second separable component are connected to the fuse module, and the first separable component... The other end of the separating component is connected to the other end of the first contact component, and the other end of the second separable component is connected to the other end of the second contact component; the opening and closing drive module is used to drive the stationary and moving contacts in the first contact component and the second contact component to open and close under the control signal sent by the control device; the first separable component is used to conduct the connection with the fuse module when the first contact component is closed, and to disconnect the connection with the fuse module when the first contact component is open; the signal fuse element is used to fuse when the current signal of the main circuit meets the fusing condition, so as to supply power to the fuse module and enable the fuse module to cut off the main circuit. This device integrates a signal fuse and a separable component into the contactor module. The separable component is mechanically linked to the moving contact in the contactor module. When the contactor module is closed, the separable component conducts the fuse module; when the contactor module is open, the separable component disconnects the fuse module. Thus, under normal overload conditions, the contactor can quickly disconnect the fault by opening the circuit, and the fuse module is disconnected by the separable component, so the fuse module does not work. However, under abnormal overload conditions such as contactor welding or control equipment failure, the separable component conducts the fuse module because the contactor is not open. The signal fuse melts due to long-term heat accumulation, supplying power to the fuse module and triggering the fuse module to quickly disconnect the fault. Under short-circuit conditions, because the signal fuse melts earlier than the contactor module is controlled to open, the signal fuse melts first and triggers the fuse module to quickly disconnect the fault. Afterward, the contactor module is disconnected and opened, thus achieving coordinated disconnection of the fuse module and the contactor module at dual points. This device can provide reliable circuit protection under various fault conditions.
[0076] Figure 7 This is a schematic diagram of a circuit protection system provided in an embodiment of this application. The system may include the aforementioned integrated circuit protection device, the device to be protected, and a control device. Figure 7 As shown, the integrated circuit protection device is connected to the control equipment through a control loop, and the integrated circuit protection device is connected in series in the main circuit of the equipment to be protected.
[0077] The control equipment can perform fault analysis based on the current signal of the main circuit sent by the sensor, and control the contactor module in the integrated circuit protection device to open and close the circuit through the control circuit.
[0078] In the several embodiments provided in this application, it should be understood that the disclosed apparatus can be implemented in other ways. For example, the apparatus embodiments described above are merely illustrative; for instance, the structure or connection of the components is only one possible implementation, and in actual implementation, there may be other ways. For example, some components may be replaced by components capable of performing similar functions. Furthermore, the couplings or direct couplings or communication connections shown or discussed may be indirect couplings or communication connections through some interfaces, devices, or units, and may be electrical, mechanical, or other forms.
Claims
1. An integrated circuit protection device, characterized in that, include: Contactor modules and fuse modules; The contactor module includes: a first contact assembly, a second contact assembly, a signal fuse, a splitting drive module, a first separable component, and a second separable component; the first contact assembly and the second contact assembly respectively include a stationary contact and a moving contact; One end of the first contact assembly and one end of the second contact assembly are connected in series to the main circuit; One end of the signal fusible link is connected to the other end of the first contact assembly, and the other end of the signal fusible link is connected to the other end of the second contact assembly; One end of the first separable component and one end of the second separable component are connected to the fuse module, the other end of the first separable component is connected to the other end of the first contact assembly, and the other end of the second separable component is connected to the other end of the second contact assembly. The opening and closing drive module is used to drive the stationary and moving contacts in the first contact assembly and the second contact assembly to open and close the circuit under the control signal sent by the control device. The first separable component is used to connect to the fuse module when the first contact assembly is closed, and to disconnect from the fuse module when the first contact assembly is open; The signal fuse is used to melt when the current signal of the main circuit meets the melting condition, so as to supply power to the fuse module and enable the fuse module to cut off the main circuit.
2. The integrated circuit protection device according to claim 1, characterized in that, The separation and engagement drive module includes: an action control coil, a control circuit, and a magnetic drive mechanism; the magnetic drive mechanism is disposed between the action control coils; the action control coils are connected to the control device through the control circuit. The control circuit is used to energize or de-energize the action control coil under the drive of the control signal sent by the control device; When the motion control coil is energized, the motion control coil drives the magnetic drive mechanism to close the stationary and moving contacts in the first contact assembly and the second contact assembly to conduct the main circuit; when the motion control coil is de-energized, the motion control coil drives the magnetic drive mechanism to open the stationary and moving contacts in the first contact assembly and the second contact assembly to disconnect the main circuit.
3. The integrated circuit protection device according to claim 2, characterized in that, The control signals include: a power-off signal; When the control device detects that the current signal of the main circuit is greater than a first threshold and less than a second threshold, it sends the power-off signal to the control circuit. Alternatively, when the control device detects that the current signal of the main circuit is greater than the second threshold, it sends the power-off signal to the control circuit.
4. The integrated circuit protection device according to claim 2, characterized in that, The magnetic drive mechanism includes: an iron core, a spring, a drive shaft, and a support component; The two support rods of the support member respectively support the other end of the first contact assembly and the other end of the second contact assembly; The iron cores attract each other after the action control coil is energized to drive the spring to compress, thereby driving the support member through the drive shaft to drive the moving contact in the first contact assembly to the closed position and the moving contact in the second contact assembly to the closed position. When the action control coil is de-energized, the spring rebounds to drive the iron cores to separate from each other, thereby driving the support member through the drive shaft to pull the moving contact in the first contact assembly back to the open position and the moving contact in the second contact assembly back to the open position.
5. The integrated circuit protection device according to claim 1, characterized in that, The first separable component includes: a fixed component and a movable component; The fixed component is fixedly connected to the fuse module, and one end of the movable component is connected to one end of the moving contact of the first contact component; The other end of the active component faces the fixed component; When the first contact assembly is closed, the movable component of the first separable component is driven to move toward the fixed component and contact the fixed component, thereby the first separable component turns on the fuse module. When the first contact assembly is tripped, the movable component of the first separable component moves away from the fixed component and separates from the fixed component, thereby disconnecting the fuse module.
6. The integrated circuit protection device according to claim 1, characterized in that, The fuse module includes a trigger circuit, an excitation source, and an actuator; the actuator is disposed opposite to the main circuit, and the trigger circuit excites the actuator to perform an action to cut off the main circuit through the excitation source.
7. The integrated circuit protection device according to claim 6, characterized in that, The signal melt is specifically used to melt and generate an arc voltage when the current signal of the main circuit is detected to be greater than the second threshold, and to supply power to the excitation source to trigger the excitation source to act, thereby driving the actuator to cut off the main circuit.
8. The integrated circuit protection device according to claim 1, characterized in that, The device further includes: an arc-extinguishing module; the arc-extinguishing module includes an arc-extinguishing fuse; The arc-extinguishing fuse is connected in parallel to the main circuit; The arc-extinguishing fuse melts based on the fault current flowing through it after the fuse module cuts off the main circuit, thereby extinguishing the arc.
9. The integrated circuit protection device according to any one of claims 1-8, characterized in that, When the current signal of the main circuit is greater than the second threshold, the melting time of the signal melt is earlier than the time when the moving contact in the first contact assembly and the second contact assembly is electrodynamically repelled.
10. A circuit protection system, characterized in that, Includes the integrated circuit protection device, the device to be protected, and the control device as described in any one of claims 1-9; The integrated circuit protection device is connected to the control device, and the integrated circuit protection device is connected in series in the main circuit of the device to be protected.