132 results about "Short circuit protection" patented technology

1. Name of the product in this design: Graphical user interface for displaying battery power in electronic devices. 2. Purpose of this design: For use as a battery power display interface on a motorcycle voltage display panel. 3. The key design features of this product are its graphical user interface content. 4. The image or photograph that best illustrates the design's key features: the front view. 5. The rear view, left view, right view, top view, and bottom view have no design points, so the rear view, left view, right view, top view, and bottom view are omitted. 6. Human-computer interaction method of graphical user interface: The main view is the full-charge state of the color screen voltmeter, that is, the state after the voltmeter is fully charged and charging is turned off when the OFF button is clicked; clicking the ON button can switch to the changing state diagram 1, the color screen voltmeter interface is in the charging state; changing state diagram 2 is the low battery display of the color screen voltmeter; changing state diagram 3 is the discharge short circuit protection state of the color screen voltmeter.

This application provides a short-circuit protection circuit, a short-circuit protection device, and a vehicle. The short-circuit protection circuit includes a trigger circuit and a first isolation device, with the trigger circuit connected to the first isolation device. The trigger circuit is used to: sample a first voltage of the charging circuit; output a first signal to the first isolation device based on the first voltage; and the first isolation device is used to disconnect the charging circuit when the first signal corresponds to a short-circuit condition. Through the technical solution of this application embodiment, the trigger circuit controls the conduction and disconnection of the first isolation device by directly outputting a signal to it. This results in a very fast response speed, achieving microsecond-level control, enabling rapid disconnection of the charging circuit even in the event of a short circuit, thus protecting the battery pack from damage.

The utility model relates to measuring alternating current parameter technical field discloses alternating current parameter tester, include: the signal acquisition module for carrying out the collection to the product parameter signal of measurement, prevent the short circuit protection module of instrument appearance short circuit or reverse connection and influence test process, signal acquisition module includes the voltage division unit, filter unit, AD conversion unit that connect gradually, short circuit protection module includes signal amplification unit, signal isolation unit, on-off control unit that connect gradually. The utility model has the advantages of high collection precision, fast speed, good stability by precision resistance voltage division, then filtering processing, and the analog signal is converted into digital signal and handles, can use in high temperature and normal temperature environment, newly added short circuit protection module that can test the protection of product, no matter what kind of circuit problem appears in the process of testing the product, can realize automatic protection, will not influence the alternating current parameter measurement of test instrument to product.

This invention proposes a multi-channel DC adjustable intelligent electronic circuit breaker, specifically relating to the field of circuit protection technology. It includes an MCU module; a power supply connected to the MCU module; a current adjustment knob (KNOB) connected to the MCU module; at least one intelligent fuse connected to both the power supply and the MCU module, with each intelligent fuse corresponding to a load connected to its respective channel; one-time fuses corresponding to the intelligent fuses; and a Bluetooth unit built into the MCU module. By configuring the MCU module, designing the current adjustment knob (KNOB) on the MCU module, and designing intelligent fuses on each load-connected path, the short-circuit protection response time of the multi-channel DC adjustable intelligent electronic circuit breaker proposed in this invention is improved by one level, from the microsecond (µs) level to the nanosecond (ns) level.

1. The name of the design product: pyrotechnic fuse. 2. The use of the design product: short circuit protection for electric circuit. 3. The design points of the design product: in shape. 4. The picture or photo that best shows the design points: perspective view.

The utility model discloses a novel heat exchange module control box of control technical field, including host case, the bottom fixedly connected with a bottom plate of host case, the top fixedly connected with display screen control panel of bottom plate, the one end fixedly connected with bottom electric control board of bottom plate close to display screen control panel, and the top electric control board is provided with in the top of bottom electric control board of bottom plate. Host case inside is provided with special installation chamber, and the fixing, installation and wiring work of circuit element, terminal are convenient, guarantee the neat and safety of internal circuit, and the maintenance process is simplified. Adopt microprocessor as core control unit, realizes accurate temperature control and circulating pump speed adjustment and so on function, and is equipped with multiple protection mechanism (such as overload protection, short circuit protection etc.), ensures the stable operation of system and personnel safety. Integrated efficient data processing module can automatically record the data of each operation, and supports data export or direct printing output, is convenient for subsequent analysis and archives.

A short-circuit protection circuit, a short-circuit protection method, and an electric vehicle are disclosed, relating to the field of electric vehicle technology. The short-circuit protection circuit includes a sensing resistor, a voltage comparator, and an MCU. The primary circuit of a push-pull switching circuit is grounded through the sensing resistor, and the push-pull switching circuit provides a driving voltage to the MCU's driving circuit. The first input terminal of the comparator is connected to a reference voltage, and the second input terminal of the comparator is connected to the first terminal of the sensing resistor, the second terminal of the sensing resistor being grounded. The comparator outputs a low level when the reference voltage is less than or equal to the voltage at the second input terminal; otherwise, it outputs a high level. When the MCU confirms that the comparator outputs a high level, it controls the push-pull switching circuit to operate; when it confirms that the comparator continuously outputs a low-level pulse signal, it controls the push-pull switching circuit to stop operating. Using this scheme, when a short-circuit fault occurs in a power switching device, all power switching devices can be simultaneously shut down, preventing the short-circuit fault from causing greater damage.

This application relates to the technical field of aerosol generation devices, disclosing a charging interface protection circuit, protection method, and aerosol generation device. The charging interface protection circuit includes a battery cell, a charging interface, a charging management circuit, a switching circuit, and a control circuit. The control circuit is electrically connected to the battery cell, charging interface, charging management circuit, and switching circuit, and is configured to: shut down the charging management circuit; detect a first charging voltage at the positive charging terminal; and, based on the first charging voltage and a first preset voltage threshold, control the charging interface protection circuit to operate in an open-circuit protection mode, executing an open-circuit protection strategy based on the contact resistance between the positive and negative charging terminals; or control the charging interface protection circuit to operate in a micro-short-circuit protection mode, controlling the switching circuit to be turned on or off based on the power adapter's charging protocol, thereby stopping the power adapter from supplying power. Therefore, the embodiments of this application can achieve abnormal detection and protection of the charging interface, improving charging safety.

The application discloses a kind of single-phase short-circuit fast detection protection circuit based on spectral characteristics, including AC section and DC section;In AC section, L line is connected in series with Hall current sensor, the output end of Hall current sensor is respectively connected with one end of voltage-dependent resistor and electrical equipment, voltage-dependent resistor is connected with the port III of rectifier element after being connected with electrical equipment in parallel, the port I of rectifier element is connected with N line;In DC section, the collector of the port II of rectifier element is respectively connected with triode NPN, one end of diode D1 and one end of capacitor C1, the emitter of triode NPN is respectively connected with the other end of diode D1, one end of diode D2 and the port IV of rectifier element, the other end of capacitor C1 is connected with the other end of diode D2, the base of triode NPN is connected with CON port through resistance R1.This application samples current by Hall current sensor, judges short-circuit fault using spectral analysis, and cuts off power supply by controlling triode NPN to shut down quickly through CON port, to realize fast short-circuit protection.

The utility model discloses a kind of driver 24V fan short-circuit protection circuit, and the circuit includes: sampling resistance Rm, for sampling voltage value according to fan current;First switch tube Q1, its gate is controlled to photoelectric coupling secondary side output, control fan negative pole interface FAN-COM and +24V ground EP2 conduction, supply fan power supply;NPN and PNP double triode structure, for when fan current is too large or short-circuit, NPN and PNP double triode structure conduction, low level is output to the gate of first switch tube Q1, turn off the passage of fan negative pole interface FAN-COM and +24V ground EP2, realize fan short-circuit protection.The utility model can actively cut off fan loop when driver external fan fails, protect the power supply circuit device of fan from being damaged.

This utility model discloses a DC power distribution module and a DC power distribution system. The DC power distribution module includes: a power input unit, a power distribution unit, a current detection unit, and a protection unit; the power input unit is connected to at least one DC power supply and receives input from one DC power supply; the power distribution unit is connected to the power input unit and distributes one DC power supply into eight independent outputs; the current detection unit is connected to the eight outputs and monitors the current value of each of the eight outputs in real time to ensure that it operates within a preset safety range; the protection unit is connected to the eight outputs and is used to cut off the power output of one of the eight outputs when an overload or short circuit fault is detected. This utility model distributes one DC power input into multiple outputs and performs real-time current monitoring on the multiple outputs, providing overload and short circuit protection functions.

1. Name of the product in this design: Fuse. 2. Purpose of this design: For overload and short-circuit protection of circuits. 3. The key design feature of this product is its shape. 4. The image or photograph that best illustrates the design's key points: 3D view 1.

The application relates to a low-side driving device with self-protection, a liquid cooling device and a vehicle, wherein the low-side driving device with self-protection comprises a control chip for outputting a control signal; a low-side driving circuit, an input end of which is connected with the control chip, and an output end of which is connected with a load, for outputting a driving signal to the load according to the control signal; a ground short-circuit protection circuit, one end of which is connected with a first power port, and the other end of which is connected with the low-side driving circuit, for limiting the current of a ground short-circuit loop when the driving signal on the load side is grounded; and a power short-circuit protection circuit, which is connected with the low-side driving circuit, for controlling the low-side driving circuit to be disconnected when the driving signal on the load side is connected with the first power port. The application can effectively solve the abnormality of short-circuit power or short-circuit ground wire in the working process, thereby improving the use safety.

The present application relates to a kind of high low side double mechanism fusion's IGBT short circuit protection circuit, it is related to power integrated circuit design technical field, the circuit includes high side desaturation short circuit detection circuit, low side resistance short circuit detection circuit, high side fault processing module, low side fault processing module and two-stage collaborative soft turn-off circuit;The signal output end of high side desaturation short circuit detection circuit is electrically connected to the input end of high side fault processing module and the first trigger input end of two-stage collaborative soft turn-off circuit respectively;The signal output end of low side resistance short circuit detection circuit is electrically connected to the input end of low side fault processing module and the second trigger input end of two-stage collaborative soft turn-off circuit respectively;The output end of high side fault processing module and the output end of low side fault processing module are electrically connected to the control input end of two-stage collaborative soft turn-off circuit;Two-stage collaborative soft turn-off circuit is electrically connected to high side IGBT gate and low side IGBT gate.The effect of considering turn-off speed and peak suppression is realized.

1. The name of the design product: air switch. 2. The use of the design product: used for closing, carrying and breaking circuit, and providing current leakage and short circuit protection for circuit. 3. The design points of the design product: in shape. 4. The picture or photo that best shows the design points: perspective view 1.

The utility model discloses a portable electric packing machine's short circuit protection charging battery, including shell, battery group, protection circuit board and interface, and interface includes charging interface and discharge interface, and charging interface includes C+ input end and C input end, and discharge interface includes P+ output end and P output end, and battery group includes B+ positive pole, B negative pole, and protection circuit board includes protection IC, charging MOS, discharge MOS, and protection circuit board still includes short circuit protection diode, and B+ positive pole of battery group is connected with protection IC, C+ input end and P+ output end electricity respectively, and B negative pole of battery group is connected with protection IC, discharge MOS electricity respectively, and discharge MOS is connected with protection IC, charging MOS electricity respectively again, and charging MOS is connected with protection IC, P output end, the anode of short circuit protection diode electricity respectively again, and the cathode of short circuit protection diode is connected with C input end electricity. The utility model discloses when charging port short circuit fault, can effectively protect circuit, charging battery and equipment, and simple structure, and the cost is lower.

The application provides a kind of driver protection function test circuit and test method, the test circuit includes: short-circuit protection function test circuit, gate under-voltage protection function test circuit and high-voltage active clamping protection test circuit, wherein, short-circuit protection function test circuit is tested by double-path voltage division between the collector / drain and emitter / source of the driver to be tested, power emitter / source and emitter / source to apply voltage to carry out short-circuit protection function test;Gate under-voltage protection function test circuit is tested by series voltage division to adjust the power supply voltage of the driver to be tested to carry out gate under-voltage protection function test;High-voltage active clamping protection test circuit carries out active clamping protection test by detecting high-voltage DC power output current. By implementing the application, the protection function test of the driver is realized, and the function retest of the driver under the condition of no structural damage before final shipment is solved.

The present invention provides an electrode assembly with a structure that prevents short circuits between the ends of a positive electrode plate and a negative electrode plate, separated by a spacer. The electrode assembly consists of one or more electrode plates, one or more spacers, and one or more stacked secondary electrode plates. Each electrode plate has a tab that extends further outward transversely than the spacer from one end of the assembly. One face of the tab is not coated with an active material. At one end of the assembly, an insulating coating is applied to the grooved surface of the secondary electrode plate adjacent to the tab, with the spacer between them. This coating is applied after the secondary electrode plate has been coated with an active material and grooved, and before the electrode plate, secondary electrode plate, and spacer are stacked.

The utility model relates to power protection technical field discloses a kind of constant voltage constant current short-circuit protection device, comprising: power transmission end, reference sampling circuit, first voltage sampling circuit, first current sampling circuit, first optocoupler and comparison control chip.Reference sampling circuit is used to export voltage reference value and current reference value to comparison control chip;First voltage sampling circuit is used to export first voltage sampling value to comparison control chip;First current sampling circuit is used to export first current sampling value to comparison control chip;Comparison control chip is connected with first optocoupler, comparison control chip is used to export short-circuit signal to first optocoupler when determining that first voltage sampling value is lower than the voltage reference value, and first current sampling value is higher than current reference value;The model of comparison control chip is TSM104 chip.Can be combined with the double conditions of voltage and current, the accurate identification to real short-circuit fault is realized.

1. The name of the design product: circuit breaker. 2. The use of the design product: for circuit overload, leakage and short circuit protection. 3. The design points of the design product: in shape. 4. The picture or photo that best shows the design points: perspective view 1.

This application provides a battery protection chip, system, short-circuit protection detection comparator, and electronic device, relating to the technical field of power supplies. The battery protection chip includes: a power-on reset circuit, a delay circuit, a short-circuit protection detection comparator, a logic processing module, and a power transistor; the power-on reset circuit generates an enable signal based on the voltage output by the power supply; the delay circuit outputs the enable signal after a preset delay; the short-circuit protection detection comparator receives a preset threshold signal, a VM signal, and the delayed enable signal, and outputs a detection signal indicating whether a short circuit has occurred; the logic processing module receives the detection signal and the delayed enable signal, and generates a control signal based on the detection signal and the enable signal; when the control signal is a first control signal, the power transistor is turned off, keeping the VM signal at a high level; when the control signal is a second control signal, the power transistor is turned on, pulling the VM signal low.

The utility model relates to comparator circuit protection technical field discloses the load short circuit protection circuit based on comparator, include: current sampling resistance RS2, first end connects public end, second end ground connection, comparator U13 the opposite phase input end through resistance R106 and electric capacity C67 shunt network connection RS2's public end, the positive phase input end through resistance R107 connects TL431 reference source U14's cathode, TL431 reference source U14's reference pole passes through resistance R111 ground connection, drive chip EG27324. In the utility model, through comparator U13 the direct triggering of B light coupling U10 action, force MCU to shut off drive chip EG27324, and after receiving hardware fault signal, through software filtering algorithm secondary verification load state, simultaneously, three -level hardware filter and software dynamic threshold value compensation, realize the cooperative protection mechanism of hardware fast response and software accurate fault tolerance.

Disclosed are a short-circuit protection circuit, a short-circuit protection method and a switching power supply of a power converter. The power converter comprises a transformer and a main power tube connected with a primary winding of the transformer. The short-circuit protection circuit comprises: a soft start unit, which provides a drive voltage rising from zero with a controlled slope to a control end of the main power tube; a comparison unit, which compares a first sampling voltage representing a current flowing through the main power tube with a preset protection threshold voltage; and a logic control unit, which, when the drive voltage reaches a first voltage greater than a threshold voltage of the main power tube and the sampling voltage is greater than or equal to the protection threshold voltage, indicates that a short-circuit winding exists in the transformer, and turns off the main power tube for short-circuit protection. The short-circuit detection after the drive voltage exceeds the threshold voltage can avoid the period in which the Miller platform is located, does not need to set a shielding time, avoids misjudgment of the sampling voltage, shortens the turn-on time of the main power tube, reduces the current of the main power tube and avoids tube breakdown.

The utility model provides an AC power distribution cabinet comprising a cabinet body and a plurality of AC power distribution units. The front end of the AC power distribution unit is provided with an AC input cable and an AC input line concentration assembly, the rear end of the AC power distribution unit is provided with an AC output cable and an AC output line concentration assembly, and the AC power distribution unit comprises a power distribution shell, a female head AC input connector and a protection module. According to the alternating-current power distribution cabinet provided by the utility model, the space utilization rate in the cabinet body can be effectively improved, and the layout density in the alternating-current power distribution unit cabinet body is increased, so that the power distribution requirement of high-power-density equipment is met in a limited space; moreover, the short-circuit protection of the AC power distribution unit can be effectively realized through the protection module, thereby improving the safety of the AC power distribution unit. Besides, the AC power distribution unit can be independently operated from the power distribution cabinet body of the data center, multiple paths of AC input can be supported at the same time, and the applicability of the AC power distribution cabinet is enhanced.

The utility model relates to the technical field of integrated circuit, especially relates to a high side drive circuit and short circuit protection circuit thereof. The short circuit protection circuit includes: shunt module and comparison module, the trigger end of shunt module is connected with the source electrode of N channel switch device, the input end of shunt module is connected with the grid of N channel switch device, the output end of shunt module is connected with the output end of high side drive circuit, and the input end and the output end of shunt module are based on the first current communication of trigger end;The first input end of comparison module, second input end are connected with the input end, output end of high side drive circuit respectively, and the output end of comparison module is connected to singlechip, so that singlechip generates control signal according to voltage comparison result, to control the conduction and shutdown of N channel switch device. The technical problem that the current that flows through N channel switch device is big when the circuit output end and load connection ground short circuit in prior art, and switch device is easily damaged, influence circuit normal work.

The residual current circuit breaker comprises a shell, a residual current module, an L-pole unit and an N-pole unit, the shell is provided with a first chamber and a second chamber, the N-pole unit is installed in the first chamber, and the L-pole unit is installed in the second chamber; the residual current module comprises an electronic component board, a zero sequence transformer and a residual current operating release, the residual current operating release and the electronic component board are respectively installed in the first chamber, and the zero sequence transformer is at least partially installed in the first chamber; the N-pole unit comprises an N-pole moving contact, an N-pole static contact, an N-pole operating mechanism and an N-pole short-circuit protection device, the N-pole operating mechanism is connected with the N-pole moving contact, and the N-pole short-circuit protection device and the residual current operating release are respectively used for driving the N-pole operating mechanism to be unlocked and released. The residual current circuit breaker of the application sets the short-circuit protection device and the operating mechanism in the first chamber where the N-pole unit is located, not only has the short-circuit protection, but also improves the reliability of the closed contact of the N-pole contact.

The short-circuit protection device of the circuit breaker comprises a second conductive part electrically connected between a first terminal and a static contact, a static iron core and a dynamic iron core oppositely arranged, a dynamic iron core spring for providing an elastic restoring force to the dynamic iron core, a top rod connected with the dynamic iron core, the second conductive part is of a rigid structure, the second conductive part is provided with a magnetic circuit section, the second conductive part at least the magnetic circuit section surrounds the static iron core, when the second conductive part flows through an electric current, the magnetic circuit section generates a magnetic field and magnetizes the static iron core, when the electric current value exceeds a threshold value, the dynamic iron core overcomes the counterforce of the dynamic iron core spring, drives the top rod to move to the direction of an operating mechanism, so that the operating mechanism is tripped. The short-circuit protection device of the circuit breaker of the present application, the second conductive part surrounds the magnetic circuit section of the static iron core, instead of the coil in the conventional electromagnetic tripper, without the need to set a coil skeleton for supporting the coil, reduces the parts, and simplifies the structure of the short-circuit protection device.

This utility model relates to the field of lighting control technology, specifically a signal conversion circuit for point light sources. It includes a main controller, which is connected to a signal converter via a short-circuit protection circuit, a reverse connection protection circuit, a lightning strike protection circuit, and a hot-swap protection circuit. The digital output and input terminals of the signal converter are both connected to an SPI signal driver via the hot-swap protection circuit. The driving terminal of the SPI signal driver is connected to an LED group. The analog output and bus output terminals of the signal converter are also connected to an RS signal output terminal. This signal conversion circuit for point light sources, through the coordinated arrangement of the signal converter, SPI signal driver, and RS485 signal output terminal, can convert SPI to RS485 signals and RS485 to SPI signals, integrating them into the point light source to drive the LEDs. It achieves a control signal transmission distance of 200 meters between points without requiring address writing, facilitating installation and debugging, and enabling long-distance control.

The utility model provides a kind of conductor and high voltage line short circuit protection device, it is related to circuit protection equipment, conductor includes straight plate shape through-flow conductor, the middle part of the through-flow conductor is equipped with the breaking section of reduced width, the breaking section includes a plurality of sequentially connected narrow diameter parts, each the narrow diameter part includes center fixed block, and the easily removable block connected with the both ends of the center fixed block, the both ends of the easily removable block are relatively recessed to form groove.The utility model has the beneficial effects that: when each narrow diameter part is simultaneously cut off in short circuit, the two easily removable blocks of each narrow diameter part both ends are cut off, arc will be generated at the cut-off position of each easily removable block, form arc voltage, since each narrow diameter part is sequentially connected, arc voltage will also be sequentially connected, when the overall arc voltage after connection exceeds the power voltage in high voltage line, the current in high voltage line rapidly decreases, thereby effectively improve the response speed of high voltage line short circuit protection device, and timely protect circuit.

1. The name of the design product: incentive integrated contactor. 2. The use of the design product: for circuit short circuit protection. 3. The design points of the design product: in shape. 4. The picture or photo that best indicates the design points: design 4 perspective view. 5. Design 4 is designated as the basic design.