121results about How to "Achieve short circuit" patented technology

The invention relates to a short-circuit electric connector which is an electric connector which carries out short-circuit or open-circuit switching among contact components and is provided with a preservation mechanism and a short-circuit module. The short-circuit electric connector comprises a plug, a switchover base combination component, a maintenance mechanism, a short-circuit module and a socket, wherein the plug comprises a guide pin, a casing, an insulation base, a jack contact component, an installation plate, a sealing ring and a locking screw. The switchover base combination component comprises a leading wire, a needle base, an insertion needle contact component and a screw sleeve, and the maintenance mechanism comprises a supporting spring and a cover casing. The short-circuitmodule comprises a hole upper base, a short-circuit jack contact component, a hole lower base, a retainer ring, a riveting pipe, a spring washer, a pull rod, a screw cap and a short-circuit wire. Thesocket comprises a casing, an insertion needle, a separation spring, a baffle plate, an upper insulation base, a push rod, a supporting spring of the push rod, a lower insulation base, a floating riveting pipe, and an installation screw. By the insertion and combination of the plug and the socket and the insertion and pull of the short-circuit module, a short-circuit and open-circuit switching function between lines is realized.

The invention discloses a multiple output supply, comprising a transformer provided with at least two output paths, a power control module for controlling the input of the transformer, and a voltage detecting comparison module. The voltage detecting comparison module detects an output voltage of a certain output path in a plurality of output paths except a main output path provided with feedback, and outputs the detecting result to the power control module; the power control module can start up the protection according to the detecting result. The invention further comprises a mutual-inductance element, wherein the mutual-inductance element is in series connected to a detecting output path which is connected with a voltage detecting module and at least one output path of the multiple output supply respectively. The circuit of the invention is very simple, complicated circuits, such as reference source and comparator, are not needed, and the parts that can bring depletion such as resistance are not required.

The invention discloses an overhead line intelligent fault positioning processing system and a method thereof. The system mainly comprises a fault indicator, a gatherer, a voltage transformer and a monitoring management platform. An ad-hoc network is formed through the monitoring management platform, the gatherer, the voltage transformer and the fault indicator for data communication and transmission. Through a wireless ad-hoc networking technology, the use of a wireless network of a service provider is unnecessary, and restrictions of a service provider network are eliminated, such that the operation cost is saved, and data security is ensured; at the same time, faults such as single-phase grounding and the like are determined through combination with an expert analysis unit, system functions are enriched, and the accuracy in determining a single-phase grounding fault is substantially improved; and besides, the fault indicator as a major part employs an induction power-drawing technology, the problem of depletion of electric energy does not have to be considered, installation is finished in one step, replacement is unnecessary, the practicality is enhanced, at the same time, since an energy consumption problem is solved, the system provided by the invention can fully exhibit more effects, and the functions are increased.

The invention discloses an intelligent power-assisted controller of an electric bicycle. The intelligent power-assisted controller comprises a signal processing and center control module, a power-assisted signal collecting module and a motor drive module; the power-assisted signal collecting module comprises a torque sensor and an acceleration sensor which are connected to the signal processing and center control module; the motor drive module comprises a PWM (pulse-width modulation) drive circuit connected to the signal processing and center control module, and a direct current motor connected with the PWM drive circuit. According to the invention, the bicycle can be driven to run by combined man-machine force; proper electric power-assisting energy is automatically provided according to the size of the driving pedal force of a person and the change of road condition resistance; the expenditure of a battery is saved, and prolonging of the endurance mileage is facilitated, so that the amusement and use property are obviously improved with the common participation of manpower.

The invention discloses a wire order test method for testing cable wire order. The method is as follows: a first N-path analog quantity switch selector is placed at the side of a cable to be tested, and a far-end loopback line is arranged; the far-end loopback line is respectively connected with resistors R1-RN in series, and the requirement of selecting far-end loopback resistors is that the sumof any two resistors is not equal; local 5 V high level is output through the line and then delivered to a far-end loopback passive joint; the 5 V high level is looped back to the local through the tandem resistors in the line and then through the tandem resistors on the other line; and because the sum of any two far-end resistors is not equal, the partial pressure value on any loopback line is not equal, thus the connection manner of the wire order can be judged. In the invention, a single port device is used to achieve measurement and the cost of the test device can be saved. By using the method, the measurement of any wire order can be realized. The method can be used in more occasions owing to the any wire order judgment function.

The invention provides a transformer fault simulating device which comprises three transformers. The first transformer comprises a plurality of high-voltage winding sleeve pipes, and terminals of the high-voltage winding sleeve pipes are connected to different positions of high-voltage winding coils respectively. Fastening bolts used for adjusting the height of a high-voltage winding are arranged between an upper insulation coil and an iron core and the lower insulation coil of the iron core of the second transformer, and supporting bars used for enabling the high-voltage winding to protrude outwards and a low-voltage winding to concave inwards are arranged between the high-voltage winding and the low-voltage winding. The third transformer is used for simulating winding warping faults. The three transformers are independent from one another, and the complex faults of short circuits, displacement, warping and bumps can be simulated simultaneously.

The invention discloses a fault positioning monitoring system for a distribution network. The system comprises fault positioners, a signal receiving device and a fault information display device, wherein the fault positioners are used for measuring the specific positions of ground or short-circuit faults in lines by fault voltage and current traveling wave signals; the signal receiving device is used for receiving signals from the fault positioners; the fault positioners are arranged at the two ends of each line in the distribution network; each line is provided with at least two fault positioners; and the signal receiving device is connected with the fault information display device by a local area network. The fault positioning monitoring system has the advantages that: the faults can be accurately positioned to greatly shorten time for searching for the positions of the faults; and after a specific line with the fault is determined, loss caused by the fault can be decreased by cutting the circuit of the line off and simultaneously recovering the power supply of the other lines without the fault.

The invention discloses a novel electronic cigarette with the tobacco tar detecting function. The novel electronic cigarette with the tobacco tar detecting function comprises a cigarette holder, a control chip, a battery, oil storing cotton, a heating wire for atomizing, and an LED lamp. The novel electronic cigarette with the tobacco bar detecting function is characterized in that the control chip is that a VDD (Voltage Drain Drain) pin is connected with battery electrode, a VSS pin is grounded, an AT pin is connected with the heating wire for atomizing and is also used as a charging interface of the battery, an LED pin is connected with the LED lamp, a SW pin is connected with the cigarette holder, and an NCT pin is connected with the oil storing cotton. According to the novel electronic cigarette with the tobacco tar detecting function, a cigarette controller with the tobacco tar detecting function is added, so that the comfort of a customer is increased, and the safety is improved.

The invention discloses a photovoltaic array fault parameter identification method, which can realize parameter identification of faults such as shadow shielding, bypass diode short circuit, abnormalincrease of equivalent series resistance and the like of a photovoltaic array, and specifically comprises the steps of continuously adjusting to-be-identified parameters of the array simulation modelby utilizing a differential evolution algorithm according to the scanning an array I-V characteristic curve, and enabling I-V curve output by the simulation model to continuously approaches to the actual measurement I-V curve, and finally, minimizing the error between the two curves, so that fault parameters are identified. The precondition of the identification method provided by the invention isthat an array model capable of simulating the three faults at the same time is built. The identification method can identify the fault parameters when a plurality of faults occur at the same time, can obtain the fault degree and other related information through the identified fault parameters, and is suitable for the fields of fault diagnosis, performance evaluation and the like of the photovoltaic array.

The invention provides an electric automobile energy transmission system and transmission method, wherein the electric automobile energy transmission system comprises an alternating-current power supply, an inductance module, a first full-bridge rectification inversion module, a second full-bridge rectification inversion module, a transformer and resonance compensation module, a third full-bridgerectification inversion module and a power battery module which are connected in sequence, wherein the transformer and resonance compensation module comprises a transformer, a first inductor, a secondinductor, a first capacitor, a second capacitor and a first switch; the input end of the primary side of the transformer is connected with the first inductor, and the output end of the primary side of the transformer is connected with the first capacitor; the input end of the secondary side of the transformer is connected with the second inductor, and the output end of the secondary side of the transformer is connected with the second capacitor and the first switch which is connected with the second capacitor in parallel.

The invention discloses a method for monitoring the short circuit and circuit break of a vehicle-mounted relay or contactor coil. When a detected vehicle-mounted relay or contactor coil is driven in a low-side drive manner, a detection resistor R1 is connected in parallel between the collector electrode of a driving triode Q1 of a vehicle-mounted relay or contactor and the emitter electrode of the driving triode Q1. The low-potential end of the detection resistor R1 is connected with the A / D interface of a single-chip microcomputer. The collected voltage V1 of the low-potential end of the detection resistor R1 is judged through the single-chip microcomputer. When the voltage V1 is equal to zero, the coil is judged to be in a circuit break state; when the voltage V1 is equal to a working voltage Vg of the detected vehicle-mounted relay or contactor coil, the coil is judged to be in a short circuit state. When the detected vehicle-mounted relay or contactor coil is driven in a high-side drive manner, the coil is judged to be in the short circuit state when the voltage V1 is equal to zero, and the coil is judged to be in the circuit-break state when the voltage V1 is equal to the working voltage Vg, subtracting the voltage drop of the detection resistor, of the detected vehicle-mounted relay or contactor coil. According to the invention, the employed elements are low in cost, are simple, and are easy to get. A testing method is safe and reliable, and the practicality is high.

The invention belongs to the technical field of testing, and particularly relates to a device and a method for detecting a cable. The device for detecting the cable comprises main end equipment and secondary end equipment which are connected to two ends of a cable to be detected respectively, wherein each of the main end equipment and the secondary end equipment comprises a switch array, a current supply (1), a data transmitting circuit, a data receiving current, a matching detector (2), a controller (3) and a human-machine interface (4); and the secondary end equipment also comprises a forward direction detection circuit and a reverse direction detection circuit. By the device and the method, short circuit, cable sequence and disconnection of the cable can be detected without an external communication support, and common ground points are not needed at two ends of the cable to be detected, so that the device and the method can be used for detecting the cable when the two ends of the cable are at the same position before the arrangement of the cable, and can also be used for detecting the cable when the two ends of the cable are not at the same position during or after the arrangement of the cable, and all the operations can be finished by one operator.

The invention discloses an aviation high-power composite brushless starting power generation system and a control method thereof and belongs to the technical field of aviation starting and power supply systems. The starting power generation system comprises a starting generator, a power generation controller, a multiplexing starting controller, an AC / DC rectifier, an AC / AC converter, a current detection unit, a first conversion contactor, a second conversion contactor, a DC contactor, an AC contactor, a starting contactor, a first multiplexing contactor and a second multiplexing contactor. Theinvention further discloses a control method of the starting power generation system. A multi-winding, AC / DC dual-output and multiplexing control system configuration is provided, the system weight is reduced, the impact of starting and power generation on components is solved, and system efficiency, reliability and safety are improved.

The present invention discloses an electric appliance fault detection method. The method comprises the steps of: collecting electrical signals of a circuit, and converting the electrical signals to discrete digital signals; performing preprocessing processing of the discrete digital signals, and obtaining discrete digital signals after preprocessing; comparing a power intensity change value of thediscrete digital signals with a power intensity threshold value preset by an electric appliance, and determining an electric appliance matching with the power intensity threshold value and a switching state of the electric appliance according to a comparison result; performing wavelet transform of the discrete digital signals to separate a function cluster; obtaining singular points in the circuit through discontinuity points of one function in the function cluster; and determining faults of the circuit according to the singular points in the circuit and the switching state of the electric appliance. The electric appliance fault detection method increases the identification of classes of the electric appliances, solves the problem that fault electric appliances cannot be confirmed after fault identification in the prior art, and can determine whether types of electric appliances have faults through combination of the fault identification and a load switch identification algorithm based on power.

The invention discloses a top cap for a lithium ion battery. The top cap comprises a top cap cover plate, an electrolyte injecting hole, an explosion-proof hole, a first electrode pole and a second electrode pole, wherein the electrolyte injecting hole and the explosion-proof hole are formed in the top cap cover plate; the first electrode pole and the second electrode pole respectively penetrate through the top cap cover plate and are fixed on the top cap cover plate; the first electrode pole is conductively connected with the top cap cover plate; the second electrode pole is in insulated connection with the top cap cover plate; in addition, an electric connecting sheet which is conductively connected with the second electrode pole is arranged on the second electrode pole; a voltage measuring hole is also formed in the top cap cover plate; an overcharge preventing device is arranged above the voltage measuring hole, is electrically connected with the top cap cover plate and is locatedbelow the electric connecting sheet; when the internal air pressure inside the battery is greater than or equal to a preset value, the overcharge preventing device is electrically connected with the electrical connecting sheet; when the air pressure inside the battery is smaller than the preset value, the overcharge preventing device is in insulated assembly with the electrical connecting sheet.

According to a transaction path short circuit method of a blockchain payment channel network, a payment channel concentrator is arranged to connect the plurality of payment channels, so that fund transaction between different payment channels is carried out, and the short circuit of the transaction path is realized. Based on the transaction path short circuit method of the blockchain payment channel network, the characteristic of high flexibility of the payment network is fully utilized, and the payment channel concentrator is arranged on the network to realize short circuit of different payment channels, so that the path length of transaction between non-direct connection nodes is greatly shortened, and the transaction efficiency in the payment network is improved.

An electromagnetic operating mechanism is applied to a special circuit interrupter of an intelligent electric meter, and comprises an electromagnetic mechanism and an energy-saving mechanism, wherein the electromagnetic mechanism comprises an electromagnet, a reactive spring and a transmission mechanism; the energy-saving mechanism comprises a lock catch unit, an energy-saving unit and a tripping unit; a movable iron core of the electromagnet is moved to an attracting position at the coil electrifying moment; the fastening unit and the movable iron core form a lock catch structure to enable the movable iron core to be fixed at the attracting position, in addition, the energy-saving unit controls the power off of the coil at the moment when the movable iron core leaves an initial position, so that the power consumption of the electromagnetic mechanism is zero, and a large amount of electric energy is saved; the tripping unit can receive a tripping command and then triggers the lock catch unit to unlock the lock catch structure, as a result, the movable iron core quickly returns to the initial position, and after tripping, the stripping unit can reset for reuse.

The invention provides a superposition type wire alignment device array with the core number therein to be not limited. The wire alignment device array comprises a host computer array and a slave computer array. The host computer array comprises a plurality of host computers. Each host computer comprises a first MCU processor module, and the first MCU processor module is respectively connected with a host computer interaction module, a first RS485 communication module and a host computer-side detection circuit. The slave computer array comprises a plurality of slave computers. Each slave computer comprises a second MCU processor module, and the second MCU processor module is respectively connected with a slave computer interaction module, a second RS485 communication module and a slave computer-side detection circuit. The first RS485 communication module of each host computer and the second RS485 communication module of each slave computer are connected with a local area network. According to the technical scheme of the superposition type wire alignment device array with the core number therein to be not limited, a network module is added in a detection circuit, and a plurality of sets of wire alignment systems are overlapped and combined together to form a wire alignment array. Therefore, the lamination on the number of wire cores is broken through.

The invention discloses a plate type active coke regenerating device. The plate type active coke regenerating device comprises a window frame and a window sash frame. The window sash frame is locatedon the inner side of the window frame. The window frame is of a square frame structure formed by two first cross borders and two first vertical borders. First corner steel hooks are connected to the joints of the first cross borders and the first vertical borders, first seamless steel profiles are sleeved with the first cross borders and the first vertical borders, first connection pegs are arranged on the side faces of the first corner steel hooks respectively and movably embedded into ports of the first seamless steel profiles respectively, and first pin shafts penetrating through the firstseamless steel profiles and the first connection pegs are arranged on the side faces of the first cross borders and the first vertical borders. The plate type active coke regenerating device is reasonable in structure, convenient to use and good in integrity, the strength and impact resistance of the window frame and the window sash frame are effectively improved, mounting, dismounting and cyclicutilization are convenient, resources are saved, the cost is reduced, and the plate type active coke regenerating device is efficient and practical.

The invention provides a battery protection device, a cover plate assembly and a battery. The battery protection device comprises a cover plate body and a temperature memory component, wherein one end of the temperature memory component is electrically connected with a second electrode terminal, the temperature memory component has a low-temperature memory form and a high-temperature memory form, the other end of the temperature memory component is disconnected and contacted with the cover plate body respectively in the low-temperature memory form and the high-temperature memory form, and the temperature memory component can be deformed to the high-temperature memory form from the low-temperature memory form when the internal temperature in the battery is higher than a preset temperature control threshold. In the battery protection device, a short circuit is formed between the first electrode terminal and the second electrode terminal when the internal temperature in the battery exceeds the preset temperature threshold of the temperature memory component, the residual energy of the battery is consumed by means of impedance of a structure such as the cover plate body and the temperature memory component, and a fire or explosion risk of the battery is reduced.

The invention discloses a remote photovoltaic module monitoring device. The device is electrically connected with a single photovoltaic module, and comprises a shell and a function module in the shell, wherein the function module comprises a sampling module, an adjustment module, a central processing module, a relay module, a wireless communication module and a defect detection module; the sampling module is used for collecting sampling data of the photovoltaic module; the adjustment module is used for adjusting output voltage and output current of the photovoltaic module; the central processing module is used for controlling the adjustment module to adjust the output voltage and the output current of the photovoltaic module after the sampling data is collected; the relay module is used for controlling short circuit and open circuit of the photovoltaic module; the wireless communication module is used for sending the sampling data and the processed data to a cloud server; and the defect detection module is used for carrying out defect detection on a battery piece in a sampled photovoltaic module image. The remote photovoltaic module monitoring device is capable of monitoring the working states of photovoltaic modules in real time and timely and correctly detecting the defects of abnormal battery pieces, so as to timely discover conditions and give alarms.

The invention discloses equipment for replacing an electric meter without interrupting power supply. The equipment comprises a jointing clamp and a short circuit box. The short circuit box comprises abox body, a short circuit column, a conduction sheet, a push button and a fixing assembly. One end of the short-circuit column is connected with the conduction sheet, the other end of the short-circuit column is an insertion end, the conduction sheet is connected with one end of the push button, the other end of the push button is arranged outside the box body, the push button moves relative to the box body, and the fixing assembly arranged at two sides of the box body and used for fixedly connecting the short-circuit box with the jointing clamp. The jointing clamp is provided with a jack, athreading hole and a screw hole which are matched with the short circuit column, the threading hole and the screw hole vertically penetrate through each other, the conduction sheet is connected between the jack and the screw hole, the side surface of a conducting column is provided with a thread, the bottom of the conducting column is provided with a linear groove, and the screw hole is connectedwith the conducting column in a matching way. After the short circuit column on the short circuit box is inserted into the jack of the junction box, short circuit between incoming and outgoing lines of each phase of the electric meter is realized, the electric meter can be replaced under the condition of uninterrupted power supply, and normal power utilization of a user is ensured.

The invention discloses an intelligent monitoring unit for vehicle-mounted three-phase alternating current power supply equipment. The intelligent monitoring unit comprises a power mother board and a control panel, wherein the power mother board comprises an auxiliary power supply unit, a lightning protection unit and a protection action executing unit; the control panel comprises a three-phase alternating current detecting unit, a three-phase alternating voltage detecting unit, an electric leakage detecting unit, a main control unit and a ground state detecting unit, wherein the ground state detecting unit adopts dual-ground detection, the control panel integrates a CAN (Controller Area Network) bus communication function and a 485 serial bus communication function. The whole intelligent monitoring unit has multiple functions of lightning protection, three-phase alternating current overcurrent, short circuit, electric leakage protection, three-phase alternating voltage overvoltage, undervoltage protection, ground state detection protection and the like, and provides a safer driving environment for a vehicle driving operator.

The invention relates to a charging protection circuit, a charging protection system, a charging protection method, a charger and an interphone. The charging protection circuit comprises a diode D1, capacitors C1-C2, an SCR (silicon controlled rectifier), a resistor R1, a first DC (direct current) / DC converter and an overvoltage detection unit. A cathode of the diode D1 is connected with an anode circuit, an anode of the diode D1 is connected with a cathode circuit, and the capacitor C1 is in parallel connection with the diode D1. An anode of the SCR is connected with the cathode of the diode D1, a cathode of the SCR is connected with the anode of the diode D1, and a control electrode of the SCR is connected with a signal output end of the overvoltage detection unit through the resistor R1. The first DC / DC converter is connected with the SCR, and two ends of the capacitor C1 are connected with an anode output end and a cathode output end of the first DC / DC converter respectively. A detection end of the overvoltage detection unit is connected with the anode output end of the first DC / DC converter. Compared with the prior art, the charging protection circuit has the advantages that due to multi-level protection measures, overvoltage protection and overcurrent protection in a charging process are realized, and accordingly risks are reduced, and personal safety and equipment safety are guaranteed.

The invention discloses an electromagnetic starter and a detection method of the electromagnetic starter. The electromagnetic starter comprises a singlechip, an alternating current contactor, a leakage detection circuit, a current detection circuit and a power-switching circuit, wherein an output voltage signal of the power-switching circuit connected with an air switch is fed into the singlechip, the leakage detection circuit, the current detection circuit and the input end of a relay control circuit respectively; the other path of output current signal of the air switch is output through the leakage detection circuit, the alternating current contactor and the current detection circuit, and is used for connecting the a binding post to a leakage experimental switch; detection current signals output by the leakage detection circuit and the current detection circuit are respectively fed to an STC singlechip for processing; and digital signals output by the singlechip are connected with the internet through an RS485 communication circuit, and can be used for setting functions of the starter through the internet. According to the detection method, with the adoption of the detection circuit and the software program, detection treatment on overload / underload current, leaking current, low voltage, overvoltage and the like of a motor is realized, and protection on the motor is realized.

The invention discloses a preparation method of a high-security aluminum electrolytic capacitor-type lithium cobalt oxide lithium-ion battery. The method comprises a positive plate fabrication procedure, a negative plate fabrication procedure, a negative plate processing procedure, a winding and molding procedure and the like; cathode aluminum foil of an aluminum electrolytic capacitor is attached to double surfaces of a negative exposed region of the negative plate obtained in the negative plate fabrication procedure to obtain a to-be-wound and molded negative plate in the negative plate processing procedure; the positive plate, the negative plate, a diaphragm and release paper are wound and molded in a winding manner to obtain a cylindrical battery core in the winding and molding procedure; the diaphragm is arranged between the negative plate and the negative plate in the winding process; the negative exposed region wraps the positive exposed region and is arranged on the circumference of the outer side of the cylindrical battery core; and the release paper soaked with a capacitor electrolyte is attached to the double surfaces of the diaphragm wound between the negative exposed region and the positive expose region. The preparation method of the high-security aluminum electrolytic capacitor-type lithium cobalt oxide lithium-ion battery disclosed by the invention has the characteristics of being good in security, high in power density, convenient to process and low in cost.

The invention discloses a wireless charging system output energy control circuit and a control method. The control circuit comprises a primary circuit, a secondary circuit, a magnetic coupler and a load, wherein the primary circuit and the secondary circuit are connected through the magnetic coupler, and the secondary circuit is connected with the load; the primary circuit comprises an AC power supply, an AC / DC rectifier converter, a high-frequency DC / AC inverter and a primary compensation circuit connected in sequence; the secondary circuit comprises a secondary compensation circuit and a high-frequency AC / DC rectifier connected in sequence; and the high-frequency AC / DC rectifier comprises a first diode, a second diode, a first switching device and a second switching device. According to the circuit provided by the invention, the first switching device and the second switching device are adopted to replace two lower bridge arms of the original high-frequency AC / DC rectifier, better control on the secondary output energy can be realized through control on the first switching device and the second switching device, short circuit or open circuit protection on the circuit is realized and the system reliability can be improved.

The invention discloses a novel separated wireless charging device, and the device is characterized in that the device comprises a charger, wherein the charger is provided with a power plug and a first interface, the charger is internally provided with a control circuit, the input end of the control circuit is connected with the power plug, and the output end of the control circuit is connected with the first interface; a connecting line, wherein the first end of the connecting line is provided with a second interface connected with the first interface; and the wireless charging coil which isconnected with the second end of the connecting line. Judgment and charging functions of wired charging and wireless charging can be completed by using the USB wire with the lowest cost, the manufacturing cost of a separation mode is further reduced, the convenience of the separation mode is enhanced, and the advantages of separation type wireless charging are optimized. In addition, the coil canreceive charging of wireless charging, and can be used bidirectionally by inserting an electric wire into the receiving circuit to replace the inside of the receiving device.

The invention discloses an electric connector with a short circuit function, which comprises a plug and a socket, wherein the socket comprises a socket shell (9), a socket base (10), and two jacks (7); the plug comprises a plug shell (1), a plug base (3) and two pins (2); the socket also comprises an elastomer and a short circuit module; the short circuit module can move in a direction vertical to insertion of the plug and the socket under the elastic force effects of the elastomer to electrically contact the two jacks (7) simultaneously, and thus, the short circuit connection between the two jacks (7) is realized; and during the insertion process between the plug and the socket, the plug shell (1) of the plug pushes the short circuit module to enable the two jacks (7) to be insulated with the short circuit module respectively. The electric connector of the invention can be used for electrical connection between two pieces of equipment with floating existing in the axial position, the structure is compact, the appearance size is small, and the reliability is high.

The invention provides a battery protection apparatus, a cover plate assembly and a battery. The battery protection apparatus comprises a cover plate body and a temperature memory element; ventilating holes are formed in the cover plate body; the temperature memory element is electrically connected with the cover plate body and seals the ventilating holes; the temperature memory element has a low-temperature memory state disconnected from a first electrode terminal and a high-temperature memory state conducted with the first electrode terminal; and the temperature memory element can be changed from a low-temperature memory state into a high-temperature memory state when the internal temperature of the battery is higher than a preset temperature threshold value. By virtue of the battery protection apparatus, when the internal temperature of the battery is higher than the preset temperature threshold value of the temperature memory element, a short circuit is formed between the first electrode terminal and a second electrode terminal, and the residual energy of the battery is consumed by impedance of the cover plate body, the temperature memory element and other structures, so that risk of ignition or explosion of the battery can be reduced to the maximum degree.