534results about How to "Fast charging" patented technology

The invention relates to a storage battery quick charging safety control method, device and equipment and a storage medium. The method comprises the following steps: modeling an equivalent circuit and a thermal equivalent circuit of the storage battery to obtain a dynamic decoupling matrix; battery safety state data are obtained through parallel calculation; performing abnormal mode recognition to obtain an abnormal mode recognition result; inputting an abnormal mode recognition result into a heterogeneous graph gate loop unit, and extracting spatial-temporal features through heterogeneous graph convolution and a GRU structure to obtain deep fault features; calculating the charging safety capacity, and carrying out multiple constraint control on the thermal management and the charge state of the battery to obtain a charging power distribution scheme; the charging power distribution scheme is input into the two-stage model prediction controller for distributed power redistribution, a charging control instruction is obtained, the battery state can be monitored in real time, the abnormal mode can be accurately recognized, self-adaptive control is carried out based on multiple constraints, and the safe and efficient fast charging process is achieved.

The invention relates to the technical field of battery materials, in particular to a graphite negative electrode material and a preparation method and application thereof. The graphite negative electrode material comprises graphite particles, the average length La of the graphite particles in the alpha-axis direction of microcrystals is larger than or equal to 40 nm, the average thickness Lc of the graphite particles in the c-axis direction of the microcrystals is larger than or equal to 25 nm, and the interlayer spacing d002 ranges from 0.336 nm to 0.338 nm, and the number parameter of the microcrystals contained in each single graphite particle is defined as N = D503 / (La2 * Lc); d50 is the median particle size of the graphite particles, the unit is [mu] m, and the numerical value of N is more than 0 and less than or equal to 0.04. The graphite negative electrode material disclosed by the embodiment of the invention comprises the graphite particles with stable microcrystalline structure, large microcrystalline size and large interlayer spacing, so that the expansion and stress distribution uniformity of the negative electrode material in the circulation process is improved, the diffusion of ions in the graphite particles is facilitated, the consumption of active lithium is reduced, and the service life of the negative electrode material is prolonged. And the dynamic and super-long cycle stability of the graphite negative electrode material is improved.

The invention relates to an interface expansion device for USB (Universal Serial Bus) quick charging and data communication, which comprises more than one input interface, more than one output interface, more than one switch module, a protocol control handshake module and a power supply module, data ends of the more than one output interface are respectively connected with a signal end of the protocol control handshake module, power supplies of the more than one input interface are respectively connected with an input end of the power supply module, the more than one switch module is respectively connected with an output end of the power supply module, and power supply ends of the output interfaces are respectively connected with the switch module. The control end of the switch module is connected with the data end of the protocol control handshake module. According to the invention, the extended USB interface not only can support high-speed data communication, but also can support Type-C rapid charging.

The invention relates to a quick battery active equalization method based on a flyback converter, and belongs to the technical field of lithium battery equalization. According to the method, a bidirectional flyback converter is adopted as an energy transfer circuit, and a finite-state machine algorithm FSM and an external auxiliary power supply are introduced, so that the following functions are realized: when the battery with the highest electric quantity reaches a set value, the flyback converter is utilized to transfer energy to the battery with the low electric quantity, the charging speed is accelerated, and the charging time of the whole battery pack is shortened. By limiting the charging and discharging times of the high-energy battery, the aging speed is effectively slowed down, and the service life of the battery is prolonged. The optimal energy transfer algorithm judges the optimal energy transfer direction, efficient utilization of energy is ensured, and energy loss is reduced. The method is suitable for series battery packs, can be widely applied to the fields of electric vehicles, energy storage systems and the like, and effectively improves the performance and service life of the battery packs.

The invention discloses an electric vehicle charging control method, an electric vehicle is provided with four charging interfaces, a first charging interface and a second charging interface share a first communication link to interact with a charging pile, and a third charging interface and a fourth charging interface share a second communication link to interact with the charging pile. When the battery management system detects that the charging gun is inserted into the charging interface, the battery management system executes the following steps: when detecting that the charging gun is inserted into one charging interface, entering a single-pile single-gun charging mode for charging; when it is detected that charging guns are inserted into the two charging interfaces, a single-pile double-gun charging mode or a double-pile double-gun charging mode is entered for charging based on communication link attributes of the two charging interfaces; and when it is detected that the charging guns are inserted into the more than two charging interfaces, a double-pile multi-gun charging mode is entered for charging. The number of the charging guns and the number of the charging piles can be automatically recognized in the whole charging process, corresponding charging modes are matched, and single-pile single-gun charging, single-pile double-gun charging, double-pile double-gun charging and double-pile multi-gun charging are achieved.

The invention relates to a training method and device of a battery fast charge control information prediction model, computer equipment, a computer readable storage medium and a computer program product. The method comprises the steps that state information at the current moment serves as target state information, the target state information is input into a deep reinforcement learning network of a target battery, and charging control information of the target battery at the current moment is obtained; performing single-step simulation based on the charging control information at the current moment, determining state information of the target battery at the next moment and a target return value at the current moment, and updating target state information based on the state information at the next moment; the target return value is generated based on cathode potential information of the target battery; and training a deep reinforcement learning network according to the state information of each moment, the target return value and the charging control information and the state information of the next moment corresponding to each moment to obtain a battery fast charging control information prediction model. By adopting the method, quick charging can be realized.

The invention discloses a circuit for automatically unlocking an electronic lock of a charging gun in the event of abnormal power failure, which is applied to a charging pile. The invention belongs to the technical field of electric vehicles and includes an AC / DC circuit, a DC / DC circuit, an MCU, a charging gun and an electronic lock driving circuit. The circuit solves the technical problem that a motor-type electronic lock automatically recovers to an initial state after an abnormal power failure. The invention is easy to use and can automatically unlock the electronic lock without monitoring a voltage change process through an MCU. The invention adopts a large-capacity capacitor, which has fast charging and a wide operating temperature range. The overall system design of the invention is simple, and no additional unlocking device is required. The circuit integrates power-off self-unlocking and electronic lock control, and has a low production cost. The electronic lock of the invention has high safety in self-recovery after power failure, a short capacitor charging time, a high response speed, a simple circuit structure, and is easy to produce.

The invention relates to the field of mobile energy storage vehicles, in particular to an optical storage, charging and inspection integrated primary and secondary power supply vehicle. The light storage, charging and detection integrated child-mother type power supply vehicle is a product integrating photovoltaic power generation, mobile energy storage and mobile charging, the child-mother vehicle partner matching mode is adopted, under the condition that the use scene of the mother vehicle is limited, charging operation can be independently completed through the child mobile charging vehicle, the use scene is greatly enriched, and the use experience is improved. The vehicle comprises a mother carriage, a battery management system, an energy storage module, a main control module, a photovoltaic panel and a son mobile charging vehicle, the main control module is in signal connection with the battery management system and the photovoltaic panel, the battery management system is in signal connection with the energy storage module and the photovoltaic panel, the photovoltaic panel is electrically connected with the energy storage module, and the energy storage module is provided with a mains supply connection interface. The child mobile charging vehicle is located in the mother compartment, and the child mobile charging vehicle is configured to selectively move to the outside of the mother compartment to supply power to the outside and move to the inside of the mother compartment to be connected with the energy storage module.

The invention discloses an orderly charging control system and method for an electric vehicle, and relates to the technical field of electric vehicle charging. Comprising a charging pile and a control terminal, the control terminal is electrically connected with the charging pile, the charging pile comprises an electric vehicle SOC acquisition module, a charging power acquisition module, a charging time slot acquisition module and a charging control module, and the electric vehicle SOC acquisition module is used for acquiring an electric vehicle SOC from an electric vehicle battery management system by an electric vehicle carrier every 10 minutes; the charging power acquisition module is used for acquiring the corresponding total available power of the power grid in the frequency fluctuation interval of the power grid from the control terminal every five minutes; the charging time slot acquisition module is used for acquiring a charging time slot according to data acquired by the electric vehicle SOC acquisition module and the charging power acquisition module, and the charging time slot comprises time and charging power; and the charging control module is used for charging the battery of the electric vehicle according to the sequence of the charging time slots.

The invention discloses a pavement adaptive to a magnetic resonance type dynamic wireless charging system as well as a construction process, a lane and application of the pavement, and belongs to the field of road engineering and road infrastructures. The pavement comprises a lower surface layer, a middle surface layer and an upper surface layer, wherein an input power line of the magnetic resonance type dynamic wireless charging system is distributed on the surface of the middle surface layer, and then a synchronous broken stone sealing layer is adopted to ensure that the input power line is completely embedded; the middle of the upper surface layer is made of pouring asphalt concrete, and two sides are made of wear-resistant asphalt concrete; a transmitting coil of the magnetic resonance type dynamic wireless charging system is embedded in the pouring type asphalt concrete, and the transmitting coil is connected with an input power line. The mechanical compatibility performance of the transmitting coil and the road surface is improved through the special road surface design, the charging efficiency is greatly improved by cooperating with the control system to optimize electric energy input, wireless charging of the vehicle in the high-speed advancing process is finally achieved based on the magnetic resonance coupling principle, and the wireless charging device has the convenient construction technology and the excellent road performance.

The invention discloses a charging control integrated circuit, a control method thereof and an electric automobile, and relates to the technical field of charging control, the charging control integrated circuit comprises a high-voltage battery pack and an integrated controller, the integrated controller comprises a direct current charging module and a motor, and the direct current charging module comprises a power unit and a switch unit; the power unit is connected with the high-voltage battery pack and the motor. The switch unit is connected with the charging pile, the high-voltage battery pack and the motor. The switch unit is used for switching on different charging loops according to the on-off of the switch unit, so that the charging control integrated circuit enters different charging modes; wherein the charging loop comprises at least two of a boost charging loop, a direct-current quick charging loop and a current-rising charging loop. According to the invention, the circuit applicability and integration are improved, and the development difficulty and cost of the whole vehicle are saved.

The utility model belongs to the technical field of quick-charging adapters, and particularly relates to a novel multifunctional quick-charging adapter which comprises a male head, a first female seat, a second female seat, a third female seat and rubber blocks, and the first female seat, the second female seat and the third female seat are connected with the male head through the rubber blocks. Four conducting strips are arranged in each of the male head and the female seat II; two conducting strips are arranged in each of the first female seat and the third female seat, and a metal sheet A and a metal sheet B are arranged in the rubber block; the surface of the metal sheet A and the surface of the metal sheet B are respectively provided with a first hole, a second hole and a third hole. The first conductive sheet of the first female seat is fixedly connected in the first hole of the metal sheet A. The second female seat and the first conductive sheet of the male head are fixedly connected in the second hole of the metal sheet A; the device solves the problem that a current quick charging adapter cannot realize simultaneous charging of a plurality of female bases, signal transmission and display of quick charging at the same time.

The invention relates to the technical field of flue-cured tobacco planting, in particular to a flue-cured tobacco-rice-green manure rotation planting method and a transplanting device thereof.The planting method specifically comprises the following steps that sowing and seedling raising are conducted on flue-cured tobacco, and after seedling raising is completed, the transplanting device is used for transplanting and planting flue-cured tobacco seedlings on a ridged field; harvesting tobacco leaves after the flue-cured tobacco is mature; secondly, planting late rice after the tobacco leaves are harvested, and sowing astragalus sinicus 20-25 days before the late rice is harvested; and then turning, pressing and returning to the field after the milk vetch blooms in the middle ten days of April in the next year, and planting first-season rice. By introducing the astragalus sinicus, the content of organic matter in plough layer soil is increased, combination of use and cultivation of cultivated land and improvement and fertilization are achieved, the fertility of tobacco field soil is improved, and four-planting four-harvesting in two years is achieved by circularly planting the flue-cured tobacco, the late rice, the astragalus sinicus and the ratooning rice.

The invention discloses an intelligent charger data adjusting system and method based on artificial intelligence, and belongs to the technical field of charger adjustment. When a charger starts to work, charging information and basic information of a charging terminal are collected, and the charging information and the basic information of the charging terminal are preprocessed; according to the basic information of the charging terminal, analyzing the power consumption condition of the charging terminal, forming a battery health state evaluation set, and evaluating the battery health state of the charging terminal; calculating the maximum charging power of the charging terminal, dividing the real-time residual electric quantity of the charging terminal into range intervals, and constructing a charging power distribution model of the charging terminal; the charging power of the charging terminal is adaptively adjusted, the charging terminal is monitored in real time, and abnormal conditions are prompted and subjected to safety adjustment. The evaluation accuracy of the battery health state is improved, the safety of the battery is guaranteed, and the service life of the battery is prolonged.

The invention provides a processing method and system for wireless charging risk management and a medium, and belongs to the technical field of charging risk management and big data. The method comprises the following steps: acquiring equipment identification information; extracting equipment basic information and charging demand information; acquiring charging strategy information and executing charging; acquiring charging monitoring information; and respectively processing to obtain temperature rise rate abnormal data, voltage stability abnormal data and power regulation standard exceeding data, processing to obtain a charging risk evaluation index, and judging whether the charging risk evaluation index meets requirements or not. According to the invention, by monitoring important operation parameters in the charging process in real time, potential charging safety risks can be found in time, equipment damage or safety accidents caused by overheating, unstable voltage or improper power adjustment can be prevented, the risk level in the charging process is quantified through indexes, and a basis is provided for taking preventive measures in time.

The invention discloses a composite current collector and a preparation method thereof, a pole piece, a battery and electric equipment. The composite current collector comprises a polymer base film, a bonding layer and a metal conductive layer, wherein the bonding layer is arranged on at least one side of the polymer base film 30; the metal conductive layer is arranged on the side, away from the polymer base film, of the bonding layer, and the metal conductive layer is formed on the bonding layer through transfer printing. Therefore, the composite current collector not only can improve the safety of the battery, but also can easily obtain the metal conductive layer with relatively thick thickness, and improves the quick charging performance.

The invention provides a positive plate, a battery cell and a battery. The positive plate comprises a current collector; the current collector comprises a first surface and a second surface which are opposite in the thickness direction; the coating comprises a safety coating and an active substance layer, the safety coating is located on the surface of the current collector, and the active substance layer is located on the surface, away from the current collector, of the safety coating; the positive plate is provided with a first area, and the first surface and the second surface of a current collector in the first area are provided with a safety coating and an active material layer; a plurality of first protrusions and first recesses corresponding to the first protrusions are arranged in the first area, and the first protrusions are formed by protruding the safety coating and the active material layer on the first surface towards the second surface. The safety coating forms a convex part and a concave part which are matched with the first bulge and the first recess; the safety coating further comprises a straight part located outside the protruding part, and the thickness of the vertex area of the protruding part of the safety coating is smaller than that of the straight part of the safety coating. According to the positive plate, impedance can be reduced, and polarization can be weakened.

The invention discloses a quick-charging unmanned aerial vehicle nest charging method and a charging system thereof. The charging system comprises a micro-control processing module, a charging output module and a feedback detection module. Real-time charging data and battery data of a target unmanned aerial vehicle in the charging process are collected through the feedback detection module, fuzzy control parameters are obtained through the micro-control processing module, and based on the fuzzy control parameters and feedback input variables, a fuzzy logic control algorithm is adopted to carry out data processing on the feedback input variables; according to the fast charging unmanned aerial vehicle nest charging system and the charging method thereof, the charging current value of the target unmanned aerial vehicle at the next moment is obtained, a charging control instruction is generated based on the charging current value, finally, the charging control instruction is responded through a charging output module, and charging output is correspondingly carried out on the target unmanned aerial vehicle in the unmanned aerial vehicle nest. The non-linear charging process of the unmanned aerial vehicle can be accurately controlled, and rapid charging is achieved.

The invention relates to the technical field of distribution line inspection, and discloses a distribution line unmanned aerial vehicle nest operation coverage capability evaluation method, which comprises the following steps: S1, planning a geographic information system and an unmanned aerial vehicle route; s2, a multi-mode positioning system; s3, dynamic communication priority adjustment; s4, optimizing the charging rate and the battery; s5, induction charging technology; s6, optimizing the route of the unmanned aerial vehicle; s7, performing unmanned aerial vehicle nest operation strategy and task allocation; s8, application of machine learning and artificial intelligence technologies in coverage capability evaluation; s9, performing real-time fault detection and early warning; the geographic information system and unmanned aerial vehicle route planning comprises the step of acquiring topographic features, building distribution and other information by using the geographic information system. By means of a geographic information system, route planning, multi-mode positioning, dynamic communication priority adjustment and the like, operation and maintenance cost can be reduced, existing resources and technologies are fully utilized, and efficiency, safety and reliability of the unmanned aerial vehicle in distribution line inspection and maintenance work are improved.

The invention relates to the technical field of logistics storage, and discloses a heavy-load storage robot charging pile which comprises a base and a clamping and butt-joint assembly, the clamping and butt-joint assembly is arranged on the base, a lifting plate is fixedly mounted at the bottom of the clamping and butt-joint assembly, lifting guide rods are slidably mounted at the two ends of the lifting plate, and translation plates are fixedly mounted at the bottoms of the lifting guide rods; a translation guide rod is fixedly mounted at the bottom of the translation plate, fixed middle plates are fixedly connected to the two ends of the translation guide rod, and the fixed middle plates are fixedly connected with the base; the clamping butt joint assembly comprises a convex joint and a concave joint, a butt joint guide rod is fixedly arranged at the tail of the convex joint, the butt joint guide rod is connected with a clamping pressing plate in a sliding mode, and a limiting switch sinker bar is further arranged on the clamping pressing plate; according to the invention, automatic centering butt joint of the charging gun head and the charging lead is realized, and the charging gun head and the charging lead are inserted more tightly in combination with the left-right and up-down self-correction effect of the buffer seat made of the damping material, so that the contact resistance is reduced, and large-current charging is ensured.

The utility model relates to an interphone, and provides a novel interphone with a magnetic attraction charging structure, which comprises an interphone main body, a circuit mainboard and a storage battery, the circuit mainboard and the storage battery are arranged in the interphone main body, one side of a shell is provided with two columnar mounting grooves, and the upper part of one end, positioned in the shell, of each columnar mounting groove is provided with a notch; the two columnar mounting grooves and the shell are integrally formed, a first magnet column and a second magnet column are embedded in the two columnar mounting grooves correspondingly, and the upper portions, located at the inner ends of the two columnar mounting grooves, of the first magnet column and the second magnet column abut against notches of the columnar mounting grooves correspondingly. A charging end positive pole and a charging end negative pole of the storage battery are respectively welded and connected with the upper parts of the inner ends of the first magnet column and the second magnet column, which are positioned in the notch of the columnar mounting groove, through wires; and one ends of the first magnet column and the second magnet column, which are far away from the notch of the columnar mounting groove, are attracted and connected with different magnetic poles of a magnetic charging port of the magnetic charger to charge the storage battery. According to the utility model, the problems of complex installation and low efficiency of the existing interphone charging interface are solved.

The invention discloses a charging control method for a multi-pack parallel battery power system, and the method comprises the following steps: the battery power system comprises a plurality of battery pack assemblies, and each battery pack assembly comprises a battery pack and a two-layer BCU controller; during charging, the battery pack is connected with an international charging pile through a charging circuit, the charging circuit is provided with an on-off control module, and the charging circuit is in communication interaction with the international charging pile through a first-layer BCU controller; after the first-layer BCU controller completes charging handshake with the international charging pile, state detection is carried out on the battery pack through the second-layer BCU controller; and when the state detection result of the second-layer BCU controller on the battery pack is'fault-free ', the second-layer BCU controller sends the detection result to the first-layer BCU controller, the first-layer BCU controller sends an instruction of'charging permission' to the battery pack assembly, and the international charging pile charges the battery pack. According to the invention, the charging speed of the battery power system is greatly improved, the overall charging time is shortened, and the charging efficiency is improved.

The utility model provides a battery pack charging system, and belongs to the technical field of battery pack charging. The battery pack charging system comprises a reference voltage module, a comparison module, a charging mode switching module, a charging control module and a voltage detection module, the reference end of the comparison module is connected with the reference voltage module, the output end of the comparison module is connected with the input end of the charging mode switching module, the output end of the charging mode switching module is connected with the control end of the charging control module, and the output end of the charging control module is connected with the battery pack; the input end of the voltage detection module is connected with the feedback end of the charging control module. The output end of the voltage detection module is connected with the input end of the comparison module. And the charging mode switching module is configured to switch the charging mode of the battery pack according to the electric signal output by the comparison module. The charging efficiency of the battery pack can be improved.

The present disclosure relates to a battery structure and an electronic device. The battery structure comprises a battery circuit board and two battery modules. The two battery modules are symmetrically arranged on both sides of the battery circuit board and connected with the battery circuit board. The first end of each flexible circuit board is connected with the battery circuit board, and the second end of each flexible circuit board is arranged to be connected with the mainboard of the electronic device. The first heat dissipation member is located between the two battery modules and is connected with the battery circuit board and the middle frame assembly of the electronic device. In the present disclosure, the plurality of flexible circuit boards are connected with the battery circuit board, and the plurality of flexible circuit boards simultaneously charge the battery modules to realize a fast charging mode, reduce the impedance of each flexible circuit board, and effectively reduce the heat generated by each flexible circuit board. The first heat dissipation member is connected with the battery circuit board and the middle frame assembly of the electronic device, respectively, conducts the heat in the battery circuit board to the middle frame assembly, and further dissipates heat for the battery structure.

The invention discloses a battery charging method, a storage system, a server, a medium and a product, and relates to the technical field of servers. And when the current temperature of the charging module reaches the temperature control condition, the remaining time of the maximum temperature of over-temperature protection is determined according to the current temperature change rate so as to ensure that the over-temperature protection is not triggered, namely the power supply function is not closed. Due to the real-time change of the current temperature change rate, the remaining time is determined in real time, and the calculation accuracy and real-time performance of the remaining time are improved; the full charging corresponds to the first time required by the full charging state of the battery cell. The charging current of the charging module is adjusted based on the remaining time and the first time, the charging current is increased or reduced in the adjusting process, and dynamic adjustment is carried out based on the size relation of the two time parameters, so that over-temperature protection is not triggered before the battery is fully charged, namely, the charging current is possibly increased and the charging speed is increased when the over-temperature protection is not triggered.

The present invention discloses an intelligent interconnection and mutual control system for charging bows of electric vehicles, comprising a charging pile-end control system and a vehicle-end control system, wherein the charging pile-end control system comprises a charging pile control unit, a motor mechanical self-locking / limiting drive control unit, a pile-end wireless communication unit, a charging bow and a vehicle alignment control unit; the vehicle-end control system comprises a vehicle ECU control unit, an on-board control panel system, and a pantograph on-board control unit, and electrical signals are connected among the vehicle ECU control unit, the on-board control panel system and the pantograph on-board control unit; and the pantograph on-board control unit is also respectively connected with the vehicle-end wireless communication unit and the pantograph electrical signal; the present invention ensures fast charging of electric vehicles, improves the safety of charging operation and the reliability of system operation, reduces cumbersome manual plug-in and unplugging of charging guns, increases the accuracy of vehicle alignment and parking, and has good social and economic benefits.

The invention provides a novel universal socket with an arc protection device, and mainly relates to the technical field of power sockets. A novel universal socket with an arc protection device comprises a main shell, a front panel is movably installed on the front portion of the main shell, a rear cover is movably installed on the rear portion of the main shell, and a main circuit board assembly is fixedly installed in the rear cover. A grounding plug bush and an electrode plug bush assembly are fixedly installed on the upper portion of the main circuit board assembly through cross recessed pan head screws, the bottom of the main circuit board assembly is connected with a cable assembly, and the cable assembly penetrates through the rear cover. The novel universal socket with the arc protection device has the beneficial effects that the novel universal socket with the arc protection device adopts the specially designed anti-sparking and anti-electric shock assembly to effectively prevent electric shock caused by the problems of mistaken touch, poor contact and the like, and the use safety of the socket is improved.

The disclosure provides a battery pack, a power tool system and a charging system. The battery pack includes a battery pack housing in which a battery cell assembly and a circuit board are mounted. The circuit board is electrically connected with the battery cell assembly. A plurality of Type-C connectors is arranged on the circuit board and electrically connected to the circuit board to realize an electrical connection between the battery cell assembly and the Type-C connectors, and are configured to connect external devices. The battery pack of the disclosure arranges a plurality of Type-C connectors on the battery pack housing, so that the electrical connection between the Type-C connectors and the circuit board may be used to realize the electrical connection between the battery cell assembly and the Type-C connectors, which may supply power to a plurality of different power tools at the same time to improve product applicability, further provide a possibility for mobile phones, notebooks, digital cameras and other electronic products to power supply, and a plurality of chargers may also be connected to charge the battery pack to improve charging efficiency.

An amplifier circuit and a switched capacitor circuit are provided. In an FIA (1), a series circuit of FET (2), capacitor (3), and FET (4) is connected between the power supply and ground. The series circuit of FET (12) and FET (13) is connected between the drain of FET (2) and the high-potential side terminal of the input differential pair (5), and the series circuit of FET (14) and FET (15) is connected between the drain of FET (4) and the low-potential side terminal of the input differential pair (5). The positive-side switch (10) and negative-side switch (11) of FET (4) and the input differential pair (5) are driven by a first clock signal, and FET (15) is driven by a second clock signal that is inverted by the first clock signal. FET (2) is driven by the inverted signal of the first clock signal, and FET (13) is driven by the inverted signal of the second clock signal. The gates of FET (12) and FET (14), which have opposite polarities, are connected to the common-mode voltage terminal (V). cm ).

The invention relates to the technical field of batteries, in particular to a negative electrode active material, a secondary battery and electric equipment.The negative electrode active material has the advantages that under the combined action of metal sulfide distributed in pores of a carbon matrix and a shell layer which is distributed on the surface of the carbon matrix and contains non-metal vanadium compounds, the negative electrode active material is formed; according to the present invention, the specific capacity and the rate capability of the negative electrode active material can be significantly improved, the compaction density of the pole piece can be easily improved, the structural stability of the battery can be significantly improved, the rapid charging and discharging can be achieved, the battery capacity attenuation under the high rate condition can be slowed down, and the cycle life can be prolonged.