27results about "Fuses testing" patented technology

This application provides a monitoring system based on an intelligent drop-out fuse, including an insulating support, a fuse tube, a fuse wire, an upper contact mechanism, and a lower contact mechanism. The insulating support includes a skirt section and insulating ends located on the upper and lower sides of the skirt section. A secondary cavity is provided inside the upper insulating end. The skirt section includes two main skirts connected vertically, and a main cavity is located at the connection point of the two main skirts. A voltage and current sensor is installed in the secondary cavity. A metering chip and a wireless communication module are installed in the main cavity. Several communication ports are provided on the outside of the main cavity. The metering chip is electrically connected to the voltage and current sensor, the wireless communication module, and the communication ports. This application can collect voltage and current signals, calculate and output operating parameters through the metering chip, measure the active and reactive energy of each phase, and then transmit the data to a remote location via the wireless communication module. Through real-time monitoring, it can respond to faults more quickly, reduce the damage to equipment caused by faults, and reduce on-site maintenance work.

The present application relates to the field of power distribution system equipment state monitoring, in particular to a high-voltage fuse array operation monitoring method and system based on an Internet of Things architecture, which pre-constructs an array topology graph containing thermal neighbor relationships and heat dissipation area division in the commissioning phase; in the operation phase, the current environmental reference temperature is estimated based on the low-load fuse set in the array in each sampling period, and the expected temperature of each fuse is calculated by combining the current-carrying self-heating temperature rise and the heat dissipation condition offset, then the group environmental disturbance and isolated point degradation are distinguished by neighbor deviation synchronization rate, and finally the alarm is output after multi-cycle continuity confirmation. The present application can absorb the group temperature rise caused by the change of cabinet ventilation and environmental drift, significantly reduce the false alarm rate, and at the same time improve the recognition sensitivity to early degradation of the melt. The present application uses the array collective behavior as a self-referencing benchmark instead of a fixed threshold, which improves the early degradation detection capability and suppresses false alarms.

The present application belongs to the field of automobile electronics, and provides a kind of automobile wire harness fuse wire current carrying capacity matching test method and system, comprising: establishing standardization pulse loading profile, constant current test is extended to cover the composite dynamic test sequence of peak thermal shock and average thermal accumulation;Collect fuse thermal accumulation integral value and wire insulation layer multi-point temperature, introduce three-dimensional evaluation index, identify thermal response asynchronous condition;Pulse peak and duty cycle are gradually increased, respectively, approach the limit of wire transient temperature rise and fuse thermal accumulation melting boundary, determine the safe matching interval by cross comparison;According to the safe matching interval, divide the matching level, select the optimization for asynchronous risk and overheating priority failure combination respectively, and feed back the optimization result to the selection specification.The test distortion problem caused by the asynchronous thermal response of fuse and wire under dynamic pulse current is solved, and the matching reliability and test accuracy of automobile electrical system are improved.

A circuit for monitoring an actual threshold voltage value of a MOSFET is provided. The circuit includes a current source configured to be coupled to a source terminal of the MOSFET and to generate a test current; a voltage generator configured to be coupled between a gate terminal of the MOSFET and the source terminal of the MOSFET, and to generate a test voltage, said test voltage being lower than a nominal threshold voltage value of the MOSFET; a detection unit configured to sample a plurality of voltage value at the source terminal of the MOSFET during time, to compute as a function of said plurality of voltage value at least a value of voltage variation over time, in particular over a given time period, of said voltage value at the source terminal of the MOSFET, and to provide said computed at least a value of voltage variation to an alarm generation unit; the alarm generation unit being configured to receive said computed voltage variation from the detection unit, to compare said computed voltage variation with a reference voltage, and to raise an alarm if the output of said comparison does not correspond to a predetermined output condition; and a control unit, configured to receive a test mode signal, indicative of an operation mode. The control unit is further configured to, according to said received test mode signal, select the status of coupling or decoupling of said current source to / from the source terminal of the MOSFET, determine the value of said reference voltage, set said output condition of said comparison, and signal to the detection unit to perform a plurality of said sampling operation.

The present disclosure relates to a fuse device, a battery management system, and a battery pack, and is directed to providing a circuit configuration capable of integrally performing a diagnosis function and an ignition function of a fuse serving as a protection element provided in a battery pack. To this end, the fuse device includes a fuse element, a diagnosis current supply circuit connected to the fuse element and configured to allow a diagnosis current for diagnosing the fuse element to flow through the fuse element, and an ignition circuit connected to the diagnosis current supply circuit and configured to allow an ignition current for ignition of the fuse element to flow through the fuse element. Diagnosis and ignition operations of the fuse element are performed by controlling activation of the diagnosis current supply circuit and the ignition circuit.

The present disclosure relates to a fuse device, a battery management system, and a battery pack, and is directed to providing a circuit configuration capable of integrally performing a diagnosis function and an ignition function of a fuse that is is a protective element provided in the battery pack. To this end, a fuse device includes a fuse element, a diagnosis current supply circuit connected to the fuse element can configured to allow a diagnosis current for diagnosing the fuse element to flow through the fuse element, and an ignition circuit connected to the diagnosis current supply circuit and configured to allow an ignition current for ignition of the fuse element to flow through the fuse element. The diagnosis operation and the ignition operation of the fuse element are performed by controlling the activation of the diagnosis current supply circuit and the ignition circuit.

The application relates to the technical field of power distribution network monitoring, and particularly discloses a power distribution network line fuse intelligent monitoring method and device based on multi-parameter sensing, which comprises the following steps: collecting fuse lattice strain, contact micro-displacement, harmonic spectrum and medium decomposition products, calculating a harmonic thermal equivalent coefficient, decoupling to generate a lattice intrinsic strain field, identifying a micro-wear phase point and a medium effective heat absorption rate; inputting the above parameters into a multi-physical field degradation deduction model to output whisker critical bridging risk, contact resistance nonlinear jump probability distribution and limit breaking capacity attenuation coefficient; calculating an actual protection capability boundary according to the risk value and generating a protection characteristic drift trajectory, deducing a selective protection mismatch area and an evolution trend after time-space alignment of multi-stage fuse drift trajectories, and generating and issuing a reconstruction instruction containing an adjusted rated current, a corrected upper-level delay or a started bypass protection. The application realizes quantitative identification of a fuse microscopic degradation process and dynamic reconstruction of protection capability.

In one embodiment, a system for determining appropriate ratings of one or more fuses within a fuse housing is provided. The system includes at least one sensor configured to measure operational data associated with the one or more fuses, and a controller coupled to the at least one sensor. The controller is configured to perform operations including receiving the operational data from the at least one sensor, comparing the operational data with predetermined values associated with the one or more fuses, and generating a fuse message based on the comparison. The fuse message includes information indicating whether the one or more fuses are associated with appropriate ratings.

The present disclosure relates to a fuse device, a battery management system, and a battery pack. A diagnostic current supply circuit is connected to a first fuse element and a second fuse element to allow a diagnostic current to flow in the first and second fuse elements, an ignition circuit is connected to the first fuse element and the second fuse element to allow an ignition current to flow in the first and second fuse elements. The diagnosing by controlling the diagnostic current supply circuit and the igniting by controlling the ignition circuit are independently performed.

This invention relates to a low-power intelligent pre-arc time-current characteristic testing device and its application. The device includes a voltage source, a data acquisition and control system, a shunt, a phase-selective closing circuit breaker, a load device, and a tripping circuit breaker. The load device comprises a resistor, a reactance, and an insulating liquid. The resistor and reactance form a series circuit and are immersed in the insulating liquid. The live wire L of the voltage source's output is connected to the input of the shunt. The output of the shunt is connected to the input of the phase-selective closing circuit breaker. The output of the phase-selective closing circuit breaker is connected to the input of the component under test. The output of the component under test is connected to the input of the load device. The output of the load device is connected to the input of the tripping circuit breaker. The output of the tripping circuit breaker is connected to the neutral wire N of the voltage source's output. This invention reduces the heat consumption of the testing device, accurately observes the test current, and precisely controls the test time, as verified in its application in the pre-arc time-current characteristic testing of fuses.

The application provides a fuse detection system and a detection method, and belongs to the technical field of fuse characteristic detection. A power supply is connected with a voltage regulation module through a switch module, the voltage regulation module is connected with the interface of a measured fuse through a commutation module, the voltage regulation module is connected with a control module through a current collection module, and the control module is connected with the voltage regulation module. The test method is as follows: connecting the measured fuse with the fuse interface in the detection system; selecting a test current according to the fuse specification; pressing the power button to start the power input, and outputting the power supply to the fuse for testing; the PLC controller detects the current output to the fuse in real time through a current transformer; when the current changes, the output voltage of the frequency conversion electronic source and the effective number of turns of the primary winding of the transformer are controlled to adjust the voltage input to the fuse, so that the current input to the fuse is maintained unchanged; and the fuse melting time in the fuse is recorded. The application improves the detection precision of the fuse current time characteristic.

The application discloses a transformer differential protection secondary circuit abnormality identification method, according to the situation that symmetrical differential current and asymmetrical differential current are generated when the transformer differential protection secondary circuit is abnormal, the type of transformer differential protection secondary circuit abnormality is accurately identified through the two kinds of differential current; the current operation state of the transformer is identified through judging the transformer differential current and the three-phase current of each CT participating in the differential protection, then the differential current is recalculated by adjusting the CT polarity, clock number and the like of the CT participating in the transformer differential protection one by one to match the current differential current, so that the formation type of the symmetrical differential current is identified; the formation type of the asymmetrical differential current is identified by calculating the number of asymmetrical CTs. The method can automatically, quickly and accurately identify the formation cause of the transformer differential protection secondary circuit abnormality, and is convenient for operation and maintenance personnel to quickly locate and eliminate the abnormality of the transformer differential protection secondary circuit.

The present disclosure relates to a fuse device, a battery management system, and a battery pack. A diagnostic current supply circuit is connected to the first fuse element and the second fuse element to allow a diagnostic current to flow in the first fuse element and the second fuse element, and an ignition circuit is connected to the first fuse element and the second fuse element to allow an ignition current to flow in the first fuse element and the second fuse element. The diagnostic by controlling the diagnostic current supply circuit and the ignition by controlling the ignition circuit are independently performed.

A fuse monitoring device for monitoring a fuse is disclosed. The fuse monitoring device includes at least one sensor, at least one processor and a housing. The sensor is configured to be operably connected to the fuse and configured to measure fuse data associated with the fuse. The sensor includes a current sensor that includes a frame and a core. The at least one processor is communicatively coupled to the at least one sensor and is configured to transmit the fuse data. The housing includes a mounting block that includes an inner opening. The frame of the current sensor is configured within the inner opening of the mounting block.

The application discloses a photovoltaic fuse intelligent fault diagnosis method based on data analysis, which comprises the following steps: obtaining the operation data of a target photovoltaic fuse and recording a time stamp; performing time alignment and association on the operation data to form a photovoltaic fuse operation data sequence; extracting state characteristics and generating a photovoltaic fuse state characteristic sequence; performing data analysis and constructing a semi-ordered degradation state space with degradation order constraints; calculating a degradation intensity parameter and determining a state transition constraint rule; modeling the transition process to construct a semi-ordered Markov degradation model; deducing the operation state of the photovoltaic fuse to generate a degradation state evolution path; based on the degradation state evolution path, judging the evolution consistency and evolution trend of the degradation state of the photovoltaic fuse, and outputting the fault diagnosis result of the photovoltaic fuse. The application adopts semi-ordered Markov degradation modeling, realizes the degradation path diagnosis of the fuse, and has the advantages of noise resistance and early warning.

A method for determining a state of a fuse in a battery pack is provided. The battery pack comprises a first string (110) comprising a first string fuse (111); at least one parallel arrangement (120) comprising a battery cell (121) and a resistor (122); and a first ammeter (112). The parallel arrangement is configured to be changeable between a connected state wherein the resistor is connected in parallel to the battery cell and a disconnected state wherein the resistor is disconnected from the battery cell. A second string (130) comprising at least one battery cell (131) is connected in parallel to the first string. The method comprises changing the at least one parallel arrangement of the first string to the connected state, and measuring a current passing through the first string. In an event that the change in the first current does not exceed a threshold, the first string fuse is in a blown state.

The present disclosure relates to a fuse device, a battery management system, and a battery pack. A diagnostic current supply circuit (30) is connected to a first fuse element and a second fuse element (F2) to allow a diagnostic current to flow in the first and second fuse element (F2)s, an ignition circuit (20) is connected to the first fuse element and the second fuse element (F2) to allow an ignition current to flow in the first and second fuse element (F2)s. The diagnosing by controlling the diagnostic current supply circuit (30) and the igniting by controlling the ignition circuit (20) are independently performed.

A circuit (100) for testing a DUT (104) (device under test) includes an inductor (112) coupled to a first switch (140), and the first switch (140) is coupled to a second switch (148). The circuit (100) includes a test module (108) coupled to the first switch (140) and the second switch (148). The test module (108) includes a DUT (104). The circuit (100) also includes a TVS (146) (transient voltage suppressor) coupled to the second switch (148).

The application provides a detection equipment for a fuse, which comprises a rotary transfer device, a clamp device, a loop resistance detection device and a tension detection device. The clamp device is arranged at different stations of the rotary transfer device, and the loop resistance detection device and the tension detection device correspond to the different stations of the rotary transfer device. The clamp device is used for fixing the fuse. The rotary transfer device rotates and drives the clamp device to stop at a station corresponding to the loop resistance detection device or a station corresponding to the tension detection device. The loop resistance detection device comprises a loop resistance tester, a detection electric rod and an electric rod driving mechanism. The electric rod driving mechanism drives the detection electric rod to contact a detection working surface of the fuse on the clamp device. The tension detection device comprises a clamping jaw mechanism, a tension detector and a stretching mechanism. The clamping jaw mechanism is used for clamping a pull ring of the fuse and driving a carrying member under the driving of the stretching mechanism. The tension detector is used for detecting the tension applied to the clamping jaw mechanism.

The present application relates to the technical field of electrical connection state monitoring, in particular to a new energy automobile high-voltage fuse connector health state monitoring method and system, comprising the following steps: collecting voltage and current and acceleration data and synchronously aligning, extracting contact resistance and vibration energy gradient characteristics, calculating computer electrical coupling index to quantify correlation strength, eliminating vibration interference to obtain net resistance sequence, comparing failure standards to identify abnormal rising phenomenon, and generating connector health state early warning. In the present application, by introducing vertical direction acceleration information in the process of collecting electrical data, the time variation gradient of contact resistance and mechanical vibration energy is calculated, the point-to-point product operation in the sliding time window is used to quantify the mechanical and electrical coupling correlation strength, and the contact failure risk after removing the vibration interference is accurately identified in real time under the vehicle driving state, thereby improving the instantaneity and accuracy of high-voltage fuse connector health state evaluation.

The utility model belongs to the power -on detection frock technical field, specifically discloses a kind of for the quick detection frock of power-on detection of plug-in connector connection type safety box, including detection box, multiple detection modules and multiple plug-in connectors, multiple detection modules are installed on the detection box with interval, multiple plug-in connectors are sequentially located in multiple detection modules and are connected with the detection module;The appearance of multiple plug-in connectors and the position design of its internal metal terminal are different, the shape of multiple detection modules is matched with the shape of multiple plug-in connectors respectively;Probe is connected on the detection module, and the metal terminal in plug-in connector can contact with the probe;Detection unit for carrying out power-on detection to safety box is equipped on the detection box, and the probe in multiple detection modules is connected with the detection unit. The utility model can improve the detection efficiency of plug-in connector connection type safety box power-on detection.

The application relates to the field of electronic technology and discloses a test circuit and method for direct-current breaking capacity, which are applied to a tested fuse and comprise a charging branch circuit, a charging unit and a capacitor bank; the charging unit is connected in series with the capacitor bank and used for pre-charging the capacitor bank to a target test voltage; a test loop comprises a closing switch, an adjustable inductor, an adjustable resistor and an access port which are connected in series through an inductive busbar; the access port is used for accessing the tested fuse; the test loop is connected with the capacitor bank; the adjustable inductor and the adjustable resistor are used for adjusting the total inductance value and the total resistance value of the test loop so that the time constant of the test loop is within a preset time constant range; when the closing switch is turned on, the capacitor bank is discharged through the test loop, so that an expected test current with an amplitude within a preset amplitude range is generated at the access port. The application aims to form a stable and controllable direct-current breaking test current for the tested fuse.

A semiconductor device with contact inspection circuit is provided. The semiconductor device includes a plurality of pads, internal circuitry, and a contact inspection circuit. The pads include a first pad and a second pad. The internal circuitry is coupled to the pads. The contact inspection circuit is coupled to at least the first pad and the second pad and is configured to inspect a plurality of contact connections of the first pad and the second pad when the semiconductor device is under inspection to generate an inspection result signal based on a comparison between a first test signal received from the first pad and a second test signal received from the second pad and at least one reference signal.

The application relates to the technical field of electronic circuits, and discloses a direct-current breaking capacity test system and method. The system comprises an isolation circuit, a positive output end of a low-voltage preheating circuit is connected to a first end of a test fuse through the isolation circuit, and a negative output end is connected to a second end of the test fuse; the isolation circuit is used for blocking the power supply loop of the low-voltage preheating circuit to the test fuse when the test circuit is working; a positive output end of the test circuit is connected to a connection point of the isolation circuit and the first end of the test fuse, and a negative output end is connected to the second end of the test fuse; an input end of a control module is connected to the test fuse, an output end is connected to a control end of the test circuit, and the control module is used for monitoring the working state information of the test fuse, judging whether the test fuse is arcing or not, and controlling the test circuit to output a test current to the test fuse when it is determined that the test fuse is arcing. The application aims to provide a direct-current breaking capacity test system, which can improve the test success rate under the premise of controlling the cost.

The application relates to the technical field of fuse temperature rise detection, in particular to a fuse temperature rise test fixing device which comprises a test workbench, a test base and a rotating pipe, the outer wall of the rotating pipe is fixedly connected with a rotating disc, the outer wall of the rotating disc is rotatably installed with a rotating ring, the rotating ring is fixedly connected with a gas conveying pipeline, when the second contact ball removes the contact with the single first contact block, the reset spring resets all the mechanisms to move, the up-down high-frequency reciprocating movement of the rotating contact block makes the outer wall of the rotating contact block continuously reciprocate and contact the third contact block, the third contact block makes the arc-shaped wind deflector cover reciprocate at a small amplitude, the wind blown out of the rotating pipe can reciprocate and expand and shrink at a small amplitude, and the cleaning effect of sweeping off impurities on the surface of the fuse body is further enhanced; before starting the detection, the intelligent photoelectric sensor is started by power supply, and the intelligent photoelectric sensor can detect whether the position of the fuse body is fixed in place.

The present disclosure relates to a fuse device, a battery management system, and a battery pack, and is directed to providing a circuit configuration capable of integrally performing a diagnosis function and an ignition function of a fuse that is is a protective element provided in the battery pack. To this end, a fuse device includes a fuse element, a diagnosis current supply circuit connected to the fuse element can configured to allow a diagnosis current for diagnosing the fuse element to flow through the fuse element, and an ignition circuit connected to the diagnosis current supply circuit and configured to allow an ignition current for ignition of the fuse element to flow through the fuse element. The diagnosis operation and the ignition operation of the fuse element are performed by controlling the activation of the diagnosis current supply circuit and the ignition circuit.

This invention relates to the field of distribution network operation and maintenance monitoring technology, and discloses a method and device for detecting fuse failure on the high-voltage side of a distribution transformer. The method includes: acquiring the low-voltage sequence component and low-voltage current sequence component of the low-voltage side of the distribution transformer; then, when the voltage amplitude of the negative sequence component of the low-voltage voltage is greater than the negative sequence voltage initiation threshold, determining the high-voltage three-phase voltage vector on the high-voltage side of the distribution transformer based on the low-voltage sequence component and the low-voltage current sequence component; determining the three-phase voltage amplitude; marking the phase with the lowest voltage amplitude as the amplitude characteristic phase; and marking the other two phases as phase characteristic phases; finally, determining the voltage phase of the two phase characteristic phases; and determining whether a fuse has failed on the amplitude characteristic phase based on the voltage phase of the two phase characteristic phases. In other words, by inverting high-voltage side data from low-voltage side data and utilizing real-time data processing, the method solves the problems existing in the prior art.