459 results about "Reverse connection" patented technology

The invention relates to the technical field of hydropower engineering, and discloses a single-core self-healing type looped network networking method and system, and the method comprises the steps: dividing a whole network into a plurality of sub looped networks; each sub-ring network operates independently; the light switch in each sub-ring network adopts an A / B end connection mode; reversely connecting the B end of the last measuring point to the A end of the initial measuring station by using an optical fiber to form a closed physical structure; configuring a protocol on the switch, and controlling a data flow path through the protocol; different sub-ring networks are connected through RJ45 ports, and a CAT5E shielded twisted pair or an Ethernet interface is used; when a certain node or link fails, the protocol automatically triggers a switching mechanism; the master station optical transceiver monitors the states of all nodes in real time and displays fault points through a network management interface. The system comprises a sub-ring network module, a control data flow module and a fault point display module. The problems that a traditional networking method of hydropower engineering is poor in reliability, and self-healing cannot be achieved after an intermediate node is disconnected are successfully solved.

The invention discloses a low-voltage power distribution anti-misoperation device which comprises an anti-reverse power transmission module, an anti-misoperation module, a power regulation anti-misoperation auxiliary module, an interaction control screen and a state logic switching module. The invention discloses a low-voltage power distribution anti-misoperation method and device, and the method and device can effectively eliminate the above problems through an anti-reverse power transmission module, an anti-misoperation module and a power adjustment anti-misoperation auxiliary module, have the functions of preventing reverse power transmission and preventing power failure of a user caused by manual operation, and have a locking function when a line does not meet a loop closing condition. On the basis that an original secondary loop is provided with three locks and two keys, three heat reverse connection points are added, the device keeps the original three-lock and two-key protection function of a power supply company, and the intelligent heat reverse loop closing operation function is achieved. Therefore, the five-prevention function under the condition that the electric operation cannot be realized due to the defects of the device or the electrical secondary circuit can be met.

The invention discloses a power supply processing circuit with slow start, combination and high-side eFuse functions, and the circuit comprises a slow start module which is used for the slow start of a power supply, and the slow start time is linearly adjustable; the high-side current-limiting e-Fuse module is used for simulating a single over-current fusing function of a common fuse through two self-reset switches to carry out over-current protection when the total current of the circuit reaches a threshold value, or simulating a self-recovery fuse through a self-locking switch to carry out over-current protection in a hiccup protection mode; the low-power-consumption combination module is used for realizing low-power-consumption multi-path power supply combination through discrete semiconductor devices; and the front protection module is used for providing bypass spike pulse voltage and a reverse connection prevention function for each power supply branch. According to the circuit, the circuit design is simplified, the cost is reduced, a stable and reliable power supply is provided, and meanwhile, the circuit can be integrated into a specific board card.

The utility model discloses an anti-reverse connection and anti-backflow circuit with an enabling function, comprising a main power supply module used for providing a DC input voltage; the micro-control unit is used for detecting the input voltage and the output voltage and generating an enabling control signal; the enabling switch circuit comprises two MOS (Metal Oxide Semiconductor) transistors which are reversely connected in parallel and is used for controlling the on and off of the circuit according to the enabling control signal; and the control module comprises a triode and is used for receiving an enabling control signal from the micro-control unit. According to the utility model, the MOS transistor and the triode which are reversely connected in parallel are used for controlling the circuit, so that safe and reliable control of a battery or a high-capacity load is realized, the functions of reverse connection prevention and backflow prevention are realized, the problems of a relay are solved, the integration level and reliability of the circuit are greatly improved, and the reliability of the circuit is improved. The method is suitable for various power supply management applications requiring high safety and high reliability.

The invention relates to the technical field of parallel operation energy storage systems, and discloses a current transformer connection detection method, device and system and a storage medium. By controlling the selected phase of the parallel operation energy storage system to independently output power and performing dynamic change adjustment, the relevance of each power variation is analyzed according to the inversion power variation of each energy storage inversion unit, the power variation of the power grid and the constructed detection model, so that the connection state of the CT is judged phase by phase; compared with traditional manual detection or fixed threshold judgment, the method has the advantages that the automation degree is high, positive connection, reverse connection, misconnection and missed connection of the CT can be accurately recognized in real time, abnormity can be found in time, and system faults or performance reduction caused by connection errors are avoided. The intelligent detection technology is adopted, the requirement of traditional auxiliary equipment is avoided, and the detection efficiency and the system reliability are improved.

The invention discloses an anti-reverse-connection and power-adjustable showing stand integrated power taking device and a control method, and relates to the related field of showing stands, the anti-reverse-connection and power-adjustable showing stand integrated power taking device comprises a layer plate assembly, a lamp tube assembly, a power taking assembly, a showing stand assembly, a driving rod assembly and a plug assembly, the lower end of the layer plate assembly is rotationally connected with the lamp tube assembly, and the rear end of the layer plate assembly is fixedly connected with the power taking assembly; the rear end of the laminate assembly is in sliding connection with the showing stand assembly, stepless adjustment of the brightness of a lamp tube is achieved through the PWM technology, and diversified showing requirements are met; a driving assembly is innovatively combined with intelligent heat dissipation, so that stable operation of equipment is ensured; a unique pneumatic emergency power-off mechanism provides physical-level safety protection, response is rapid and reliable, the functions of manual and electric dual-mode operation, remote intelligent control, emergency lighting and the like are integrated, the industrial pain points that a traditional showing stand is tedious in installation and inconvenient to adjust, has potential safety hazards and the like are solved, and perfect unification of safety, flexibility and intelligence is achieved.

The invention discloses a car coupler state detection and execution control circuit and a car coupler automatic picking and hanging system and method, and relates to the technical field of railway vehicle automation control, and the car coupler state detection and execution control circuit comprises a state detection unit which comprises a plurality of non-contact sensors arranged at different detection positions of a car coupler; the safety execution unit comprises a 2oo2 interlocking structure formed by a first relay and a second relay which are connected in series, a through-type Hall current sensor arranged on a main loop between the first relay and the second relay, and a third relay for controlling the extension and retraction directions of an electric push rod; the power supply management unit comprises a 24VDC power supply input terminal, a fuse, a reverse connection protection diode and a surge suppression TVS (Transient Voltage Suppressor) tube; wherein the output end of the state detection unit is connected to the input port of the controller, and the output port of the controller is connected to the control end of the safety execution unit. The safety of the system is improved through a hardware-level redundant architecture, and the reliability of coupler state detection is improved through multi-sensor fusion.

The present application provides a robot power management system, which includes a control module and a pre-processing protection module, an acquisition module, a communication module and a post-processing protection module connected to the control module; the pre-processing protection module is used to filter and suppress interference as well as limit current and prevent reverse connection of the input power supply; the acquisition module is used to collect voltage, current and temperature, and send the collected results to the control module, and the control module performs overvoltage, undervoltage, overcurrent and overtemperature protection according to the collected results; the control module is connected to the external main controller through the communication module; the post-processing protection module is used to perform overvoltage or overcurrent protection on the output end of the robot power management system. Power supplies of different voltage levels are distributed to each power receiving unit through the robot power management system of the present application. The robot power management system of the present application can control the power-on and power-off logic of each power receiving unit in the robot product, and monitor and distribute the power supply.

The adapter of the track socket comprises a socket body, one side of the socket body is provided with jacks, the other end of the socket body is provided with a connecting part used for being connected with a track, a control piece and a conductive assembly are arranged between the jacks and the connecting part, the conductive assembly comprises a fixed plug bush and a rotary contact piece which are electrically connected with each other, one end of the rotary contact piece is installed in the connecting part, and the other end of the rotary contact piece is connected with the control piece. And the control piece drives the rotary contact piece to perform circular motion, so that the conductive pin of the rotary contact piece extends out of the contact part to be connected with the conductive sheet on the track. A fool-proof mechanism used for preventing reverse connection is arranged on the rotary contact piece, the fool-proof mechanism is located at the position, corresponding to the connecting part, of the rotary contact piece, and the fool-proof mechanism and the conductive pin can rotate out of the connecting part or rotate into the connecting part along with the rotary contact piece and are used for being matched with a track fool-proof mechanism on one side of the track. Reverse connection of zero and live wires of the adapter and the track is avoided, and power utilization safety is guaranteed.

The invention provides a container login method and system, and the method comprises the steps: a first login proxy service node in a login proxy service cluster verifies the validity of a Node connection token carried by a reverse connection request when receiving the reverse connection request of any login Agent in at least one Kubernetes cluster, and after the validity verification of the Node connection token is passed, the first login proxy service node in the login proxy service cluster sends the reverse connection request to any login Agent in the Kubernetes cluster; establishing a reverse tunnel with any one login Agent; when a second login proxy service node in the login proxy service cluster receives a container login request for the to-be-logged-in container, the unified authority management module is called to perform container login authority verification; and if the container login permission verification is successful, forwarding the container login request to a login Agent corresponding to the to-be-logged container through a reverse tunnel corresponding to the to-be-logged container, so that the login Agent corresponding to the to-be-logged container executes login of the to-be-logged container, and returns a login success response to the second login proxy service node. According to the embodiment of the invention, container login can be carried out under the condition of improving security.

The invention discloses an ammeter phase sequence deviation rectifying method, and relates to an ammeter phase sequence deviation rectifying device, the device comprises an ammeter, a current transformer and an upper computer, the ammeter is provided with an MCU, the current transformer is connected with the MCU of the ammeter and is used for being installed on an electric wire in a sleeving mode to sense the current of the electric wire, and the ammeter is in communication connection with the upper computer through the MCU; the method comprises the following three conditions: the first condition is connection detection of the current transformer; the second condition is reverse connection correction of the current transformer; and the third condition is line sequence deviation correction of the current transformer. According to the invention, the connection state of the current transformer can be detected, and the detection accuracy and stability are improved; when the current transformer is reversely connected, the power utilization data can be corrected, so that the detection accuracy is ensured, the current transformer does not need to be reconnected, and the operation is convenient; when the current transformer is wrongly connected, the current sampling channel corresponding to the current transformer can be adjusted, the current transformer does not need to be reconnected, and the operation is flexible.

The invention relates to a reverse connection device between full-electronic interlocking systems and a reverse connection control method. An axle counting reverse connection control circuit and an outdoor equipment reverse connection control circuit are arranged in the reverse connection cabinet, and the lightning protection branching cabinet is connected to the reverse connection cabinet; the axle counting cabinet is connected with the existing execution cabinet and the newly arranged execution cabinet through an axle counting reverse connection control circuit; the outdoor equipment is connected with the existing execution cabinet and the newly-arranged execution cabinet through the outdoor equipment reverse connection control circuit and the reverse connection cabinet. The invention aims to solve the reverse connection problem of different types of all-electronic interlocking systems, and designs different reverse connection methods according to the type of driving and mining equipment, the control mode of the driving and mining equipment, the power supply requirement and the engineering design logic of different types of all-electronic interlocking systems; a reverse connection design scheme between all-electronic interlocking systems is formed, and the problem that no device suitable for reverse connection between all-electronic interlocking systems exists at present is solved.

The invention discloses a direct-current power supply protection circuit, and the circuit comprises an anti-reverse connection backward flow unit which is used for controlling a reverse connection response switch to disconnect a power supply loop from a direct-current power supply to a load when the positive electrode and the negative electrode of the power supply are reversely connected, and controlling a backward flow response switch to conduct a discharge loop between the load and a grounding end when the direct-current power supply is instantaneously powered down; the power-on overcurrent protection delay unit is used for responding to the power-on of the direct-current power supply and enabling the protection function of the overcurrent and overvoltage protection unit after delaying a set time; and the overcurrent and overvoltage protection unit is used for switching on the power supply loop in response to the power-on of the direct-current power supply, and controlling the protection execution switch to switch off the power supply loop through the protection driving circuit in response to the fact that the output voltage or the output current of the direct-current power supply exceeds a preset safety value in an enabling state. The direct-current power supply protection circuit has the functions of reverse connection prevention, current backflow prevention and overvoltage and overcurrent protection at the same time, and can reduce the power consumption of the circuit while improving the safety of the circuit.

The invention discloses a full-link fault isolation control method and device for an eVTOL low-voltage distribution box, and the method comprises the steps: carrying out the monitoring processing of an input voltage through an independent overvoltage protection circuit in a protection circuit, and obtaining monitoring voltage data; an independent ideal diode in the protection circuit monitors the current direction of the input end to obtain a monitored current direction; the protection circuit performs fault isolation control processing on the external power supply and the low-voltage power supply according to the monitored voltage data and the monitored current direction; and performing fault isolation control processing on a full-link fault of power supply in the eVTOL low-voltage distribution box based on a multi-stage isolation redundancy architecture. In the embodiment of the invention, quick response is realized on a hardware level, and a full-link isolation redundancy design is adopted, so that a fault is accurately limited in a local area, fault diffusion is prevented, and the reliability of a system is improved; positive and negative electrode reverse connection protection is integrated, static electricity and surge are prevented, and various abnormal inputs can be effectively resisted.

The intrinsically safe power supply comprises a safety isolation transformer, a fuse, a rectification filtering and reverse connection prevention circuit, a lightning protection circuit, a surge and overvoltage protection circuit, a DC / DC conversion circuit and a two-stage overcurrent and overvoltage protection circuit. An R-type safety isolation transformer is matched with a primary side fuse and a secondary side fuse to provide a reliable SELV power supply, a DC / DC circuit is formed based on an LM2676-ADJ chip, a two-stage over-current and over-voltage rapid turn-off protection circuit is formed through a surge protection chip ADM1270, and the nonlinear rectangular power supply output characteristic is provided. The two-stage TVS is arranged at the input end of the DC / DC circuit and the input end of the ADM1270 chip and matched with the fuse for protection, the fuse is fused under the condition that the input voltage is abnormal or the DC / DC fails, the overvoltage protection effect is achieved, and the safety of the chip and the reliability of the power supply are ensured.

The present invention discloses a capacitive load pre-charging control module with a reverse connection prevention function, comprising a single-chip microcomputer, a load switch control unit, and a charging threshold detection unit; the load switch control unit is used to receive a drive power supply connection signal sent by the single-chip microcomputer, and the charging threshold detection unit is used to set the threshold of the capacitive load charging voltage and judge the correctness of the positive and negative pole wiring of the drive power supply; when the capacitive load charging voltage reaches the threshold, a capacitive load charging completion signal is sent to the single-chip microcomputer; when the positive and negative pole wiring of the drive power supply is reversed, the single-chip microcomputer can judge by a preset time and send a positive and negative pole reverse connection signal of the drive power supply to an upper computer. The present invention prevents the reverse connection of the power supply during capacitive load pre-charging, and improves the safety and reliability of capacitive load pre-charging. At the same time, a prompt is given when the power supply is reversed.

The invention relates to a wide voltage input protection control circuit and a vehicle-mounted terminal. The circuit comprises an anti-reverse connection module, an overvoltage protection module, an under-voltage protection module and a control module. The anti-reverse connection module is used for generating a polarity detection result of the vehicle-mounted power supply and performing primary on-off control on a connecting line according to the polarity detection result; the overvoltage protection module is used for generating an overvoltage detection result of the vehicle-mounted power supply, the undervoltage protection module is used for generating an undervoltage detection result of the vehicle-mounted power supply, and the control module is used for performing secondary on-off control on a connecting line according to the overvoltage detection result and the undervoltage detection result; and according to the connection line combining the first-stage on-off control and the second-stage on-off control, the vehicle-mounted power supply provides stable power supply for a post-stage circuit within a preset wide voltage input range. By adopting the method, stable and safe electric energy supply can be realized in a preset wide voltage input range, and the reliability and the service life of the vehicle-mounted terminal under complex working conditions are improved.

The invention relates to the technical field of battery management, and discloses an energy storage battery pack polarity reverse connection prevention method, which is applied to a battery array management unit, and comprises the following steps: generating a high-voltage power-on instruction which comprises the number of a battery pack needing to be powered on currently; sending a high-voltage power-on instruction to any sub-battery management unit; and receiving the reverse connection detection result sent by the sub-battery management unit, and determining whether to control the power-off of any sub-battery management unit according to the reverse connection detection result, so that the situation of safety accidents of the energy storage system caused by power-on after reverse connection of the battery pack in the energy storage system can be avoided, and the safety of battery pack management is improved.

The embodiment of the utility model provides a charger output anti-reverse connection and anti-reverse charging protection device, and belongs to the technical field of charging safety. The charger output anti-reverse connection and anti-reverse charging protection device comprises a relay arranged at the output end of a charger and used for executing connection / disconnection of a charging loop through actuation / disconnection; the relay is connected with a relay control circuit and is used for controlling the relay to be switched on or switched off along with the voltage state of the charging loop; the detection circuit is connected to the charging loop and used for responding to the voltage state of the charging loop; and the charging loop is also connected with the relay control circuit, and transmits the voltage state to a relay driving module of the relay control circuit in real time. According to the scheme of the utility model, complicated signal judgment is not needed, passive control is realized only by depending on the voltage state, the system complexity is reduced, the protection on the charger and the battery is enhanced, and the service life of equipment is prolonged.

The utility model discloses an anti-reverse connection protection circuit, which comprises a voltage dividing module, an MOS tube, a voltage stabilizing diode and a voltage stabilizing module, and is characterized in that the voltage stabilizing module and the voltage dividing module are connected in parallel with a power supply input and a power supply output, and the voltage dividing module is connected in parallel with the power supply input and the power supply output; the voltage dividing module at least comprises a first partial voltage and a second partial voltage which are sequentially connected in series in the current flowing direction in the normal working state, the MOS tube is connected with the voltage stabilizing diode in parallel, the MOS tube is connected with the second partial voltage in parallel, the grid electrode of the MOS tube is connected with the first partial voltage, the drain electrode of the MOS tube is connected with the negative electrode of the power input, and the first partial voltage and the second partial voltage are connected in parallel. The source electrode of the MOS tube is connected with the negative electrode of the power supply output, the negative electrode of the voltage stabilizing diode is connected with the source electrode of the MOS tube, and the positive electrode of the voltage stabilizing diode is connected with the grid electrode of the MOS tube. The MOS tube is arranged to control the output of the direct current, and the MOS tube can be turned off to cut off the output of the power supply when the input is reversely connected. And meanwhile, a voltage dividing module, a voltage stabilizing module and the like are combined to protect the circuit together with the MOS tube.

The utility model relates to a DMS vehicle-mounted host power supply plug-in, which comprises a connector, a switch, a fuse, a circuit board, an indicating lamp circuit and a panel, the connector is connected with a train DC110V power supply, the other end of the connector is connected with a surge protection circuit, a common mode filter circuit and an anti-reverse-connection circuit through the switch and the fuse, the other end of the anti-reverse-connection circuit is connected with a slow start circuit, and the panel is connected with the indicating lamp circuit. The slow start circuit is electrically connected with the isolation circuit and the DC / DC power supply module; the isolation circuit is used for detecting current and voltage values of the DC / DC power supply module, the output end of the isolation circuit is connected with an MCU chip, the DC / DC power supply module is provided with a temperature detection circuit, and the output end of the temperature detection circuit is connected with the MCU chip; the output end of the MCU chip is connected with the control end of the DC / DC power supply module, and the output end of the DC / DC power supply module is connected with the output power supply interface. The utility model provides a safe and reliable system power supply for the vehicle-mounted host.

The utility model relates to a power supply control circuit supporting AC / DC input and a shared power bank cabinet, comprising an AC input interface, a DC input interface, an anti-reverse connection circuit, a decoy circuit and a DC / DC conversion circuit, the DC input interface comprises a power supply port and a fast charge protocol port; the alternating current input interface is electrically connected with a cabinet main board supporting alternating current and direct current input and used for being connected with an alternating current power supply. A power supply port of the direct current input interface is connected with the reverse connection prevention circuit, and a fast charging protocol port is connected with the decoy circuit and used for being connected with a direct current power supply; the output end of the reverse connection prevention circuit is connected with the decoy circuit and the DC / DC conversion circuit. According to the cabinet machine, alternating current is accessed through the alternating current input interface, direct current is accessed through the direct current input interface, a direct current power supply with a fast charging protocol can be supported by arranging the decoy circuit, and the problem that a traditional cabinet machine is single in power supply input type is solved.

The utility model relates to a three-phase wiring detection system, and the system comprises a confluence module which comprises a first terminal and a second terminal, and a first port, a second port and a third port of the first terminal are correspondingly connected with the live wire ends of a first micro-inverse module, a second micro-inverse module and a third micro-inverse module respectively. The fourth port of the first terminal is connected with the zero line end of each micro-inverse module, and the four ports of the second terminal are correspondingly connected with the four ports of the first terminal respectively; the first end of the switch control module is connected with the second terminal, the second end is connected to a three-phase power grid, and the switch control module comprises four switches correspondingly connected with a live wire and a zero wire of the three-phase power grid respectively; the gateway controller is connected to a three-phase power grid, is in wireless connection with each micro-inverse module, and is used for obtaining the port voltage of the micro-inverse module in a two-phase control state through wireless connection according to the phase sequence information corresponding to each micro-inverse module, determining whether a reverse connection fault exists or not based on the port voltage, and sending the reverse connection fault to the micro-inverse module. The system can improve the detection efficiency and accuracy of wiring detection.

The utility model provides a receiving and transmitting circuit capable of preventing reverse connection, which comprises a comparator U1, an integrating circuit, a control circuit and a bus switching circuit, and is characterized in that the comparator U1 is connected with a signal line 485A and a signal line 485B, the comparator U1 is connected with the integrating circuit, and the integrating circuit and the comparator U1 are used for cooperatively judging the access state of the signal line 485A and the signal line 485B; the integrating circuit is connected with the control circuit. The output end of the control circuit is connected with the signal line 485A and the signal line 485B through the bus switching circuit. The control circuit is used for controlling the bus switching circuit to realize bus switching according to the information of the integrating circuit and the comparator U1; by automatically identifying the A and B signal lines of the 485 bus and completing switching, normal communication can be ensured under the conditions of positive connection and reverse connection, and the problem of abnormal communication caused by reverse connection of 485A and 485B of equipment is solved.

This invention provides a DC power input reverse connection compatible circuit, a power supply circuit, and a household appliance. The DC power input reverse connection compatible circuit includes a first diode, a second diode, a third diode, and a control switch. The anode of the first diode is electrically connected to the positive input terminal, and the cathode of the first diode is electrically connected to the positive output terminal. The cathode of the second diode is electrically connected to the positive output terminal, and the anode of the second diode is electrically connected to the negative output terminal. The anode of the third diode is electrically connected to the negative output terminal, and the cathode of the third diode is electrically connected to the negative input terminal. The first terminal of the control switch is electrically connected to the negative input terminal, and the second terminal of the control switch is electrically connected to the positive output terminal. A reverse connection detection circuit is used to acquire the reverse connection signal between the positive and negative input terminals, and controls the control switch to turn on or off based on the reverse connection signal. This invention is compatible with both forward and reverse DC power connections and improves circuit safety during reverse connections.

A power input interface protection circuit and a power supply relate to the technical field of power supplies. The circuit comprises a protection module, an anti-reverse connection module and a filtering module. The protection module is used for being connected with an input power supply and protecting working voltage and working current output by the input power supply; the reverse connection prevention module is connected to the overcurrent protection module and is used for disconnecting the connection with the input power supply when the input power supply is reversely connected with the protection module; and the filtering module is connected to the anti-reverse-connection module and is used for filtering the working voltage and the working current output by the input power supply and outputting the working voltage and the working current so as to supply power to a load connected with the filtering module.

Level is detected of contents of a container or drum. Systems may wirelessly report when contents of the container are nearly depleted. Components include a plug, a sensor, a structural member, a terminal connector in the plug, and internal and external cables. The plug may screw into a vent hole in the container and a signal connector on the external cable connects to the terminal connector. The connectors may be configured or have magnets to prevent reverse connection. Various embodiments have a second sensor, a wireless gateway, GPS location data, cloud data processing, or a recess to receive a tool to rotate the plug and remove the system from the container. The structural member may bend to maintain verticality.

The utility model discloses a portable multifunctional manual operator, relates to the technical field of circuit protection, and mainly aims to provide a power supply short-circuit protection function for an instrument debugging tool. The main technical scheme of the utility model is as follows: the portable multifunctional manual operator comprises a functional circuit module; wherein the positive electrode end of the functional circuit module is sequentially connected to the PMOS transistor, the first anti-reverse connection diode, the first self-recovery fuse and the positive electrode wiring terminal through a first wire, and the negative electrode end of the functional circuit module is sequentially connected to the NMOS transistor, the second self-recovery fuse and the negative electrode wiring terminal through a second wire.

The invention relates to the technical field of battery protection, and discloses a pure hardware charging and discharging reverse connection prevention circuit and a battery pack. The circuit comprises a battery positive electrode port, a charging positive electrode port, an anti-reverse unit and a first sampling resistor RS1, the battery positive electrode port is used for being electrically connected with a positive electrode of a battery unit, the charging positive electrode port is used for being electrically connected with a positive electrode of charging equipment, and the anti-reverse unit comprises a first switching tube Q1, an amplifying unit and a driving circuit. The battery positive electrode port, the first switch tube Q1, the first sampling resistor RS1 and the charging positive electrode port are electrically connected in sequence to form a positive electrode main loop, the amplification unit is electrically connected with the first sampling resistor RS1 and the driving circuit, the driving circuit is electrically connected with the first switch tube Q1, and the amplification unit collects a voltage value of the first sampling resistor RS1 and transmits the voltage value to the driving circuit. Therefore, the drive circuit drives the on-off of the first switch tube Q1. The technical problems of large voltage drop, serious heating, influence on battery performance and the like of a diode reverse connection prevention scheme in the prior art can be effectively solved.