3063 results about "High current" patented technology

The invention discloses an accurate zero crossing point control method for a built-in relay of a large-current electric energy meter, which relates to the technical field of power electronics and intelligent metering and comprises the following steps of: receiving a power grid voltage digital signal, determining a voltage zero crossing point by comparing symbol changes of adjacent sampling values, establishing a phase corresponding relation between voltage and current, and calculating a current phase corresponding relation; generating current zero crossing point prediction data; when a relay switching instruction is received, the specific moment of the next current zero crossing point is calculated, and the control signal sending moment is determined; a relay driving control signal is sent, the actual action completion moment of the relay is collected, the deviation from the expected zero crossing moment is calculated, and the mechanical action delay time parameter of the relay is corrected. By predicting the current zero-crossing time and considering the mechanical action delay characteristic of the relay, accurate switching of the built-in relay at the actual current zero-crossing point is achieved, meanwhile, the self-adaptive adjusting capacity is achieved, the arc energy during large-current switching is reduced, the service life of the relay is prolonged, and the reliability of the electric energy meter is improved.

The invention relates to the technical field of circuit breakers, in particular to a circuit breaker with a reclosing mechanism, which comprises a shell, a circuit breaker handle is rotationally arranged in the shell, an operating rod and at least three gears meshed in sequence are further rotationally arranged in the shell, and the tooth number of each gear is gradually increased in sequence. The two gears located on the two sides are a small gear and a large gear respectively, the number of teeth of the small gear is smaller than the number of teeth of the large gear, the operating rod is fixedly connected with the small gear, and the large gear is in transmission connection with a circuit breaker handle. Speed reduction and torque increase are realized through the gear train, so that the force required to be applied when a user manually operates the handle of the circuit breaker is remarkably reduced, the operation intensity is reduced, the convenience of manual reclosing is improved, and the manual reclosing device is particularly suitable for a large-current circuit breaker or an occasion requiring a relatively large operation torque.

The present invention provides a mini travel power conversion socket, including: a face cover, a light guide post, a door spring, a main body, and a bottom cover. This invention provides a mini travel power conversion socket equipped with British plugs, European plugs, and American / Australian rotatable adapter plugs; the socket section is designed with a universal socket panel that can accommodate plugs from multiple countries. The product is compact and miniaturized, with a socket safety protection door set in the middle area between the face cover and the main body. It can support AC plugs / sockets capable of carrying 10 A high current. Inside the hardware socket bracket above, there is an integrated L / N pole socket hardware guide plate that is widened and thickened. Below the hardware connection bracket, there is an integrated plug hardware guide plate, along with a positioning block that can independently extend individual plugs.

The invention provides a benzanthracene compound, an intermediate and an organic electroluminescent device, and relates to the technical field of organic electroluminescent materials. The benzanthracene compound provided by the invention can be used as a main body material of a light-emitting layer of an OLED light-emitting device, so that the OLED light-emitting device has relatively low driving voltage, relatively high current efficiency and relatively long service life.

The invention discloses a parallel current sharing precision improvement method and system under multiphase heterogenous input. The method comprises the following steps: constructing a current sharing bus signal network; a PI controller is adopted to output a current-sharing adjustment amount VCS to carry out current-sharing loop control, the output amplitude limiting range of the current-sharing loop is set to be 0-+ VCSMAX, and VCSMAX = 2.5% * rated output voltage VOUTNOM; a digital delay compensation technology is added to ensure synchronization of a current-sharing bus network sampling signal and an output current sampling signal; performing moving average filtering on the current-sharing bus network sampling signal and the output current sampling signal after delay compensation by adopting a short-time domain fixed window filtering parameter; a bias error symmetric amplitude limiting mechanism is introduced, a set bias value delta Ihys is subtracted from the original current sharing error, delta Ierrbias = delta Ierr-delta Ihys is used as an effective adjusting signal, and + / -delta Ihys amplitude limiting is applied to delta Ierrbias; an asymmetric integral coefficient adjustment strategy is implemented, when the VCS needs to be increased, a low-speed adjustment coefficient Kup is adopted, when the VCS needs to be reduced, a rapid adjustment coefficient Kdown is adopted, and Kdown is larger than or equal to 2Kup; the steady-state high current sharing precision and the parallel current sharing capability can be realized.

The invention discloses a large-current inductor based on thermal actuation multidirectional sealing compensation, and particularly relates to the technical field of inductor parts, the large-current inductor comprises an inductor lower cover, an inductor upper cover, two sliding strips and a multidirectional compensation piece, and the inductor upper cover is arranged above the inductor lower cover; the two sliding strips slide on the inner wall of the inductor lower cover; and one side of each sliding strip is provided with a multidirectional compensation piece. Through the multidirectional compensation piece, the multidirectional compensation mechanism obviously enhances the adaptability of the joint of the inductor upper cover and the inductor lower cover to thermal deformation in different directions, so that the sealing compensation capability of the inductor under multidirectional thermal expansion and cold contraction is more excellent, and the sealing durability of the inductor shell is greatly improved; therefore, the problems that the sealing compensation capacity of the inductor is insufficient under multi-directional thermal expansion and cold contraction, and the sealing durability of the inductor shell is poor are solved.

The invention relates to a preparation method and application of an electrode, in particular to a preparation method and application of an anti-reverse current self-supporting electrode for anion exchange membrane water electrolysis hydrogen production. The self-supporting (NiCoFe) 9S8 electrode is constructed by adopting a directional solid-phase synthesis strategy to overcome the challenge of performance degradation of the electrolytic cell. The preparation method comprises the following steps: firstly, depositing a precursor solution of FeS2 and CoCl2 on a nickel felt substrate, and then carrying out annealing treatment to obtain uniformly grown (NiCoFe) 9S8; the method not only ensures uniform distribution of multiple metal components, but also constructs firm chemical bonding and efficient charge transfer between the catalyst layer and the conductive substrate through solid-phase interface reaction, and effectively avoids interface impedance caused by introduction of an additional binder. Therefore, high-current-density water electrolysis hydrogen production under intermittent fluctuation power supply is realized. In 1M KOH, the cell voltage is almost not attenuated when the electrode stably operates for 2000h at 500mAcm <-2 >.

The invention discloses a method for monitoring the insulation state of a stator winding of an injection unit based on neutral point harmonic frequency sweeping. The invention provides an active online monitoring method based on harmonic injection for stator winding insulation of a full-power variable-speed pumped storage unit. A common-mode loop is constructed for a motor stator winding of a network side transformer neutral point ungrounded system through a motor neutral point grounded transformer, and therefore online monitoring of the insulation state of a motor stator is achieved. In order to solve the measurement problem of the full-power variable-speed pumped storage unit under the large-current working condition, a neutral point outgoing line current detection technology is adopted. A machine end large current interference area is avoided, monitoring is carried out on the primary side of the grounding transformer, transmission errors are avoided, and the measurement precision and reliability of insulation monitoring signals are remarkably improved. According to the invention, harmonic injection is carried out by avoiding an inherent common-mode component of a unit, a monitorable leakage current signal is enhanced, and the accuracy of insulation equivalent capacitance calculation is ensured.

The invention relates to the technical field of electrical equipment state monitoring, in particular to an intelligent circuit breaker electrical life detection method and system based on data analysis. The method comprises the following steps: synchronously acquiring opening coil voltage and current sequences, a main loop current sequence and environment temperature data when a circuit breaker acts, extracting actually measured action time based on the coil data, and calculating a mechanical health degree factor by combining the environment temperature and the actually measured action time; after decoupling correction is carried out on an electrodynamic force interference factor derived by a peak current of a main loop, a mechanism wear state index is obtained; a nonlinear damage model containing basic electric heat loss and mechanical degradation acceleration factors is constructed, a single-time electric life loss value is calculated, historical loss values are accumulated, a dynamic threshold value is combined to realize full-life-cycle prediction, and evaluation interference of environmental factors and large-current electrodynamic force is eliminated through deep data analysis. The nonlinear acceleration effect of mechanism hysteresis on contact ablation is quantified, and the detection precision is remarkably improved.

The invention discloses a network construction converter virtual impedance and power reference cooperative adjustment method and system, and relates to the technical field of power control, a virtual synchronous generator system introduces virtual impedance to increase equivalent output impedance of an inverter, and an internal voltage reference generated by a virtual synchronous generator algorithm of the inverter is monitored in real time; monitoring the local voltage measured by the common coupling point in real time; based on the vector difference between the internal voltage reference and the local voltage, the accurate amplitude of the virtual impedance is solved in real time by combining the maximum current limit value of the power electronic device; and determining a function relationship between an active power reference value and reactive power based on the accurate amplitude of the virtual impedance, monitoring the reactive power measured at the common coupling point in real time, and adjusting the active power reference value according to the function relationship to keep a stable balance point. And virtual impedance is dynamically calculated to accurately limit current, and active power reference is adaptively adjusted according to real-time reactive response, so that maximized power grid support and safe and stable operation of the converter are realized.

The invention relates to an active short circuit control method and device, a vehicle and a storage medium. The method comprises the following steps: determining a target energy release mode according to hardware configuration information of a system corresponding to a motor under the condition of judging that the motor meets a preset energy pre-release condition based on a current fault type of the motor, and performing energy release; controlling a power switch tube of a first-phase lower bridge arm and a power switch tube of a second-phase lower bridge arm of the motor to be in an on state, controlling a power switch tube of a third-phase lower bridge arm of the motor to be in an off state, and when the duration of the off state of the power switch tube of the third-phase lower bridge arm reaches a first preset duration, switching off the power switch tube of the third-phase lower bridge arm. And controlling a power switch tube of a third-phase lower bridge arm of the motor to be in a conduction state. Therefore, through staged progressive short circuit, the problem that a power device and a permanent magnet are easy to damage due to overlarge impact current and remarkable current oscillation in the prior art is solved, and the impact current and the current oscillation during a high-rotating-speed fault are remarkably reduced.

The invention relates to the technical field of direct-current large-current power supply testing, in particular to a direct-current large-current power supply testing method and device. According to the invention, temperature, voltage and current are synchronously acquired through multiple channels, and data validity is marked; after smoothing processing, calculating compensation resistance by using a two-item temperature compensation formula; according to current characteristics, an abnormal threshold value is dynamically adapted in a current increasing / stabilizing / decreasing period, and a normal / early warning / shutdown instruction is output in a grading manner; performing correlation analysis on temperature-resistance and voltage-current characteristics to identify hidden defects; the weighted linear regression predicts future temperature / resistance and gives an early warning; data are stored in a layered mode, visualized display is achieved, and a report containing A / B / C grade rating is automatically generated. The device comprises a corresponding functional unit and a processor-memory architecture, and is suitable for large-current testing of multi-scene electrical equipment.

The invention provides a multi-mode cross data fusion scheduling method for a flywheel and battery hybrid energy storage system, and the method comprises the steps: collecting multi-mode signals in parallel, and fusing and packaging the multi-mode signals into a multi-mode data vector with a unified time sequence. Preprocessing and normalizing the multi-mode data vector to obtain a preprocessing sequence, and extracting a multi-dimensional grid-connected feature from the preprocessing sequence; and constructing a feature association graph based on the multi-dimensional grid-connected features, and fusing node risks of the feature association graph through a linear diffusion model to determine a grid-connected readiness score. And mapping the grid connection preparation degree score to a preset interval to determine a slope starting time window. And performing slope parameterization processing based on the slope starting time window to construct a power step sequence, and generating a plurality of control packets for issuing instructions according to power steps according to the power step sequence. According to the method, by generating a progressive grid-connected power slope, stage injection of short-circuit current is achieved, and one-time large current impact is avoided.

The invention discloses a flame-retardant flat flexible high-current cable and a preparation method thereof, and relates to the technical field of cables. The cable comprises a flat conductor, an insulating layer, a shielding layer, a reinforcing layer and a sheath layer, the insulating layer contains 85-90 parts of low-density polyethylene, 1.2-1.5 parts of dicumyl peroxide, 12-15 parts of modified aluminum hydroxide and the like; and the sheath layer contains 42-50 parts of modified chlorinated polyethylene, 28-34 parts of modified aluminum hydroxide and the like. The modified chlorinated polyethylene is prepared through a three-step extrusion reaction, and the modified aluminum hydroxide is subjected to coupling agent treatment, coating modification and carbon nanotube composite modification. The flame-retardant flat flexible large-current cable has prominent advantages, an efficient flame-retardant system is constructed by modified aluminum hydroxide and antimony trioxide, and the V-0 level requirement of UL94 can be met; the flat structure is combined with the modified chlorinated polyethylene, so that the flexibility is excellent and the temperature-resistant range is wide. The design of the insulating layer and the shielding layer ensures excellent electrical performance, segmented temperature control and accurate parameter regulation and control are performed in preparation, stable product quality is ensured, and the device can adapt to a large-current application scene.

The invention discloses a sulfide-oxide composite solid electrolyte based on Lewis acid-base reaction, a preparation method of the sulfide-oxide composite solid electrolyte and a battery, and relates to the technical field of solid-state batteries. Comprising a sulfide electrolyte and a composite coating coated on the surface of the sulfide electrolyte, and the composite coating comprises an oxide electrolyte and a Lewis alkaline substance. The oxide electrolyte and the Lewis alkaline substance are adopted as the composite coating material, so that the sulfide electrolyte can be isolated from air, the air stability of the sulfide electrolyte is effectively improved, and the phenomenon that the sulfide electrolyte is subjected to oxidation-reduction decomposition in the charge-discharge process is reduced; and by-products generated in the use process of the sulfide electrolyte can be neutralized in situ by the Lewis alkaline substance, so that the great increase of interface impedance is reduced, the cycle performance and high-current stability of the battery are remarkably improved, and the problem that the interface impedance is increased in the charge-discharge process of the traditional sulfide solid electrolyte is solved.

Disclosed is a system for zero voltage switching in a power converter with a first half-bridge and a second half-bridge. The first half-bridge has a first set of transistors and output inductor. The second half-bridge has a second set of transistors and auxiliary inductor. A current sensing means measures, at switching cycle scale, average and maximum current values of output inductor and average, minimum and maximum current values of auxiliary inductor. A voltage sensing means measures input and output voltages of first and second half-bridge. A controller is configured to compute dead times of pulse width modulation control signal of second half-bridge, generate pulse width modulation control signal of second half-bridge and to adapt dead times of first half-bridge.

The invention is applicable to the field of advanced manufacturing of powder materials, and provides flash sintering equipment for high current and high pressure, which comprises a power supply module, a pressure generation module, a support frame, a high vacuum module, a jacking module, a sintering unit and a conveying module. The sintering unit is provided with a sintering platform, a floating die module and a floating lower punch module and is guided through an upper guide column and a lower guide column. The jacking module jacks the lower electrode through a lead screw to push the floating lower punch module and the floating die module to move upwards along a guide column to be separated from the platform, and floating butt joint is achieved; the pressure generation module drives the upper punch to press downwards through the upper electrode and applies pressure to the sample, and the power supply module applies sintering current at the same time. Through the design of the floating module in non-rigid connection, the pressing force is prevented from being transmitted to the sintering platform, the equipment is prevented from overturning, and the stability of the sintering process is improved; and the whole station switching of the sintering unit is realized in combination with the conveying module, so that the continuous automatic production capacity of the equipment is improved.

The invention relates to an IGBT parallel current sharing control circuit and method for turn-off transient current change rate detection, and the circuit employs a PCB Rogowski coil probe to carry out the non-contact detection of the turn-off current change rate of a parallel device, thereby accurately judging the non-current sharing characteristic of the parallel device. The problem of integrated design of a traditional detection scheme in large-current and high-power-density application is effectively solved; meanwhile, by designing a current change rate peak holding circuit, the holding time of a peak signal is remarkably prolonged, and the performance requirement on the ADC sampling rate is greatly reduced; a reset branch is additionally arranged for the peak holding circuit, and the peak output value in the last period is zeroed in the turn-on transient state by using a driving signal, so that the charge accumulation effect is effectively eliminated, and the sampling precision of the system is guaranteed; the regulation and control part of each parallel branch only needs to be additionally provided with two passive elements including the control switch and the capacitor, current sharing control can be achieved by adjusting the access time of the bypass branch, the structure is simple, cost is low, and good popularization applicability is achieved.

The invention provides an organic electrochemical transistor regulated and controlled by a grating electrode and a preparation method of the organic electrochemical transistor, and belongs to the technical field of photoelectric detection and organic electrochemical transistors. The organic electrochemical transistor comprises a transparent substrate, a detector anode, a hole transport layer, a photosensitive layer, a semiconductor active layer, an electron transport layer, a detector cathode, a packaging layer, a transistor grid electrode, a transistor source electrode, a transistor drain electrode and an electrolyte. A QPD and an OECT are integrated above the transparent substrate. The invention also provides a preparation method of the organic electrochemical transistor. Through the illumination effect, the photo-generated voltage generated by the QPD serves as a grid regulation and control signal, and higher current variation for different illumination intensities is achieved. The preparation process is remarkably simplified, the responsivity, the detectivity and the linear dynamic range of the device are improved, the stability and the low power consumption characteristic are improved, and a new solution is provided for application of a photoelectric-electrochemical fusion device in the fields of flexible electronics, wearable detection, biosensing and the like.

The invention discloses a preparation method of high-rate fast-charging graphite from a semi-calcined coke raw material, and belongs to the technical field of batteries, and the preparation method comprises the following steps: S1, crushing and shaping the semi-calcined coke raw material; s2, carrying out graphitization high-temperature treatment on the crushed and shaped semi-calcined coke; s3, mixing and coating the semi-calcined coke subjected to graphitization high-temperature treatment with a coating agent; s4, performing high-temperature carbonization heat treatment on the semi-calcined coke mixed and coated with the coating agent; s5, screening the petroleum coke semi-calcined coke subjected to high-temperature carbonization heat treatment to obtain a semi-calcined coke raw material high-rate fast-charging graphite; the material has the advantages of large discharge capacity, good cycle performance, good electrochemical performance, high discharge plateau and plateau retention rate, good large-current charge-discharge performance, good safety, good adaptability to electrolyte and other additives, stable product properties, almost no difference between batches, simple and feasible preparation method, and suitableness for industrial production.

The invention relates to a single-loop control method for a static synchronous phase modifier, which belongs to the technical field of power systems, and comprises the following steps of: comparing a maximum voltage difference value in three phases with a preset voltage threshold value to obtain a voltage difference value after amplitude limiting, and obtaining a first virtual reactance by using the voltage difference value after amplitude limiting and a preset current amplitude limiting threshold value; performing proportional integral control on the difference between the maximum current value in the three phases and the current amplitude limiting threshold to obtain a second virtual reactance; virtual impedance is calculated according to the first virtual reactance and the second virtual reactance; the product of the virtual impedance and the current of each phase is used as the current amplitude limiting voltage of the corresponding phase; the modulation wave of the corresponding phase is generated by using the internal potential and the current amplitude limiting voltage of each phase, so that the voltage single-loop control and the fault current amplitude limiting of the static synchronous phase modifier are realized, the broadband oscillation risk and the overcurrent risk of the converter are effectively reduced, and the safety and the reliability of static synchronous phase modifier equipment are improved.

The invention discloses a high-safety nanosecond-order delay transistor testing system and method, belongs to the field of transistor testing, and can test the characteristics of a transistor to be tested at any drain voltage stress value, drain voltage stress duration and load current based on nanosecond-order measurement delay on the basis of ensuring the safety of the testing system and experimenters. The circuit comprises switches S1, S2 and S3, resistors RA and RC, Schottky diodes D1 and D2, a power inductor L and a power supply VDD. The conduction time of the switch S1 can be controlled to control the duration of the post-stage circuit for bearing the high voltage VDD; the current value of the power inductor L at the end of charging can be controlled by controlling the conduction time of the switch S2; by testing the voltage and the current of the switch S3, the switch transient characteristic, the on-resistance characteristic and the like of the switch S3 can be obtained. Simulation and experiments prove that the measurement delay of switching to the test state after the voltage stress of the drain electrode is ended is nanosecond magnitude, and the situation of'large current connection caused by mistaken switching-on of a series switch 'does not exist, so that the circuit safety is higher.

The invention discloses a preparation method of a manganese-doped iron-based sulfide / nitrogen-doped reduced graphene oxide composite electrode material for a sodium-ion battery, a simple solvothermal method is combined with annealing treatment, and iron atoms in a hexagonal system are replaced by part of manganese atoms in a hydrothermal process to form multivalent iron-based sulfide, so that the composite electrode material is prepared. The manganese-doped iron-based sulfide / nitrogen-doped reduced graphene oxide composite electrode material for the sodium-ion battery is successfully prepared by uniformly compounding the manganese-doped iron-based sulfide and the nitrogen-doped reduced graphene oxide, and the manganese-doped iron-based sulfide / nitrogen-doped reduced graphene oxide composite electrode material can effectively regulate and control the electronic state density, reduce the sodium ion migration energy barrier and promote the electron / ion transmission; meanwhile, continuous growth of iron-based sulfide particles is limited, so that the iron-based sulfide particles are uniformly dispersed on the surface of the graphene, more active sites are exposed, the electrochemical reaction activity is improved, and the structural stability is enhanced. The composite electrode material disclosed by the invention can be widely applied to a negative plate for a sodium-ion battery, and has excellent adaptability and application prospect in a wide temperature range and under a high-current working condition.

The application provides a current measurement device based on diamond NV color centers, which comprises a microwave source circuit unit configured to output a microwave signal; a diamond NV color center optical fiber probe group unit comprising a plurality of optical fibers, the top end of each optical fiber being provided with a diamond NV color center, and the top end of the plurality of optical fibers having different distances from a wire to be measured; the diamond NV color center optical fiber probe group unit is configured to receive the microwave signal and feed back the microwave signal to the microwave source circuit unit, so that the microwave source circuit unit outputs a microwave signal with a desired frequency according to the feedback to match the energy level resonance frequency of the diamond NV color center under different magnetic field strengths; and a current measurement unit configured to measure the current according to the energy level resonance frequency of the diamond NV color center. According to the embodiment of the application, the magnetic field generated by a larger current wire can be detected by using a lower frequency microwave signal through simultaneous detection of a plurality of diamond NV color centers spaced apart from the wire to be measured by a specific distance.

The embodiment of the invention provides a battery charging method and device, a battery is charged according to a first current and a second current in sequence, the current value of the second current is smaller than the current value of the first current, and the current value of the second current is larger than 0; wherein the second current comprises a falling current section, the starting point current value of the falling current section is smaller than the end point current value of the first current, and the slope of the falling current section is not zero. According to the embodiment of the invention, the battery is prevented from being continuously charged by relatively large current, the electrochemical reaction rate in the battery can be reduced, the polarization degree is reduced, and the service life of the battery can be prolonged.

The invention provides an X-ray absorption spectrum characterization system and an X-ray absorption spectrum characterization method for electrochemical reaction under a high-current working condition. A high-current electrochemical workstation provides current density not lower than that of a working condition electrolytic tank; the working condition electrolytic tank comprises a working electrode chamber and a counter electrode chamber which are oppositely arranged, and an ion exchange membrane arranged between the working electrode chamber and the counter electrode chamber; the working electrode chamber comprises a current-conducting plate made of a metal sheet, a working electrode loaded with a catalyst is arranged on one side, facing the ion exchange membrane, of the current-conducting plate, and a hollow flow channel is formed in the central area of the working electrode chamber; the working electrode chamber further comprises an X-ray window sheet for transmission of incident X-rays and fluorescent X-rays generated by the catalyst; the counter electrode chamber is provided with an electrolyte flow channel, and a counter electrode is arranged on one side, facing the ion exchange membrane, of the counter electrode chamber; and the electrolyte control system is used for realizing circulating flow of the electrolyte. Under the working conditions of high current density, strong bubble effect and high X-ray absorption, in-situ, real-time and high signal-to-noise ratio characterization of the microstructure of the catalyst can be realized.

The invention discloses an electrolytic tank performance analysis method based on polarization feature recognition. The method comprises the steps that S1, electrolytic tank parameters are set, electrochemical testing is conducted, and EIS impedance data are obtained; s2, preprocessing the EIS impedance data: performing Kramers-Kronig verification on the EIS impedance data, calculating a relative residual error of the data, and selecting a regularization parameter lambda; s3, applying the EIS impedance data to DRT quantitative analysis: converting the EIS impedance data into a DRT spectrogram based on discretization of a radial basis function and a Tikhonov regularization method; and S4, performing DRT spectrogram identification by using a DRT method, establishing an ECM model, and evaluating the influence of metal cation pollution on PEMWE performance degradation by using the ECM model. According to the electrolytic cell performance analysis method based on polarization feature recognition, the core problem that all polarization processes and the evolution rule of the polarization processes in performance degradation are difficult to accurately analyze under the condition of high current density in the prior art is solved.

The invention belongs to the technical field of commercial vehicles, and discloses a wiring structure and a commercial vehicle, the wiring structure comprises a wiring groove and a butt joint box, the wiring groove comprises a U-shaped groove body and a fixing part, the U-shaped groove body is fixed at the bottom of a flywheel shell, the fixing part is arranged in the U-shaped groove body and used for fixing a wiring harness, and the butt joint box is arranged in the U-shaped groove body. The butt-joint box is arranged on one side of the wiring groove and fixed on the side baffle of the storage battery frame, a first wiring hole is formed in the first end of the butt-joint box, a second wiring hole is formed in the second end of the butt-joint box, a fixing column used for installing the wiring end is arranged in the butt-joint box, and the wiring terminal is used for electrically connecting two wiring harnesses which penetrate into the butt-joint box from the first wiring hole and the second wiring hole respectively; the commercial vehicle comprises the wiring structure. According to the wiring structure and the commercial vehicle provided by the invention, the layout difficulty of the large-current wiring harness is effectively reduced, the wiring harness is more convenient to arrange, and the wiring harness is mainly arranged at the bottom of the flywheel shell and does not need to stretch across the left and right side frames for layout, so that the maintenance is convenient.

The invention belongs to the technical field of battery capacity grading detection, and particularly relates to a solid-state battery capacity grading method and system based on sampling resistor temperature compensation, and the method comprises the steps: collecting the local temperature of a sampling resistor and the voltages at the two ends of the sampling resistor in a capacity grading detection loop in real time; the actual resistance value of the sampling resistor is dynamically corrected through a resistance value-temperature model integrating first-order and second-order temperature coefficients and a self-heating power effect, so that high-precision real current is calculated, and the accurate capacity of the solid-state battery is determined according to the real current. The system correspondingly comprises a temperature sensor, a temperature compensation processing module and other hardware. By directly monitoring and compensating the temperature drift of the sampling resistor, the problem of capacity calculation error caused by self-heating of the resistor under large current is effectively solved, and the precision and reliability of solid-state battery capacity grading detection are remarkably improved.

The utility model discloses a single-key physical switch circuit and device, and relates to the field of power management, and the single-key physical switch circuit comprises a key detection circuit and an on-off circuit. The key detection circuit is respectively connected with the control end of the MCU chip and the on-off circuit; the on-off circuit is respectively connected with the key detection circuit, the first power supply and the power supply end of the MCU chip; the key detection circuit is used for outputting a conduction signal to the on-off circuit when the input key signal voltage value is greater than an expected threshold value when the key detection circuit is connected to the control end of the MCU chip; and the on-off circuit is used for conducting the connection between the first power supply and the power supply end of the MCU chip when receiving the conduction signal. The utility model aims to solve the problem that the loss current of a host power switch is too high, and a small-current touch switch can be used for replacing a large-current toggle switch to control the startup and shutdown of a host.