191 results about "Local current" patented technology

The invention provides a current detection coil parameter determination method and a conductor current distribution detection method, and the method comprises the steps: presetting virtual detection parameters at least according to the size of a detected conductor, and the virtual detection parameters at least comprise virtual model parameters and performance parameters of a virtual coil; on the basis of the Faraday's law of electromagnetic induction, real performance parameters of the current detection coil are determined according to the virtual detection parameters, the real performance parameters of the current detection coil are used for preparing the current detection coil, and the current detection coil is used for detecting current distribution of the detected conductor. The current detection coil prepared by adopting the performance parameters obtained by the method has high sensitivity to current in a detection area and has high shielding capability to current in a non-detection area, and non-intrusive detection with high identification capability to local current is realized. And the method can design the performance required by the coil in a customized manner according to different use scenes, and has a wide use range.

The invention provides a battery charging and discharging pulse frequency detection method and system, and the method comprises the steps: dividing a pulse current signal of a target battery during charging and discharging into a plurality of pulse signal segments, and determining the static deviation of the current of the target battery during charging and discharging based on the local current characteristics of each pulse signal segment; determining the time domain positioning error of the time interval through the static offset and the pulse width of the pulse current signal; monitoring the surface temperature of the target battery during charging and discharging, and determining the disturbance characteristics of the temperature of the target battery during charging and discharging to the current according to all the monitored temperatures and the pulse current signal; and performing pulse identification on the pulse current signal according to all the time domain positioning errors and disturbance characteristics to obtain an effective pulse time mark sequence of the target battery during charging and discharging, and determining an effective pulse frequency of the target battery during charging and discharging based on the effective pulse time mark sequence. According to the scheme, the influence of current signal drift on pulse frequency detection in the battery charging and discharging process can be reduced.

The invention discloses a vertical photoconductive switch and a preparation method thereof, and belongs to the technical field of semiconductors, and the vertical photoconductive switch comprises a substrate, an upper surface electrode disposed on the upper surface of the substrate, and a lower surface electrode disposed on the lower surface of the substrate. The projection of the upper surface electrode on the substrate and the projection of the lower surface electrode on the substrate do not completely coincide, and the upper surface electrode and the lower surface electrode are both of an asymmetric structure. An electric field vector generated by the upper surface electrode and an electric field vector generated by the lower surface electrode are subjected to interference superposition in different directions to form a staggered electric field. According to the vertical photoconductive switch, the upper electrode and the lower electrode which are of an asymmetric structure are adopted, so that current is uniformly diffused in the radial direction and the vertical direction, overdense local current, incomplete superposition of projections of the upper electrode and the lower electrode and breaking of symmetry of an electric field are avoided, the local electric field intensity is effectively reduced, and the overall voltage endurance capability of a device is improved.

The invention relates to the technical field of MOS (Metal Oxide Semiconductor) semiconductors, and discloses a silicon carbide MOSFET (Metal Oxide Semiconductor Field Effect Transistor) structure with a nail-shaped electrode on the back surface and a preparation process of the silicon carbide MOSFET structure. The silicon carbide MOSFET structure comprises a plurality of MOS cells which are arranged in parallel, and each MOS cell comprises a source electrode, a grid electrode, a grid oxide layer, a semiconductor epitaxial layer and a drain electrode, wherein an N substrate layer, an N drift layer, a P + layer, a P well layer and an N well layer are formed in the semiconductor epitaxial layer through ion implantation, and a discharge tip is further arranged in the middle area of the drain electrode in the single MOS cell; wherein the section shape of the N substrate layer is matched with the shape of the discharge tip. According to the invention, current can be guided to flow through the channel more uniformly through the discharge tip, the problem of over-high local current density is reduced, heat can be managed better through the discharge tip, formation of local hot spots is reduced, the risk of thermal runaway is reduced, and the long-term stability of the device is improved.

The invention discloses an insulation polarization current information extraction method, system and device and a medium. Relates to the technical field of power equipment insulation state monitoring. The prior art only depends on current data at a single time point and ignores wide-time-domain dynamic change information, so that the evaluation is not comprehensive. The method comprises the following steps: placing an insulating material sample in a three-electrode system to measure polarization current data in a wide time domain window; fitting the current data by adopting a multi-exponential relaxation function to eliminate interference of local current overshoot and extract an attenuation trend; extracting a transient characteristic quantity representing a transient process and a quasi-steady state characteristic quantity representing a quasi-steady state process from the fitting data; performing normalization processing on the two feature quantities to eliminate dimensional difference; substituting the normalized characteristic quantity into an S-type logic function to calculate a comprehensive state index; and outputting the comprehensive state index as characteristic information for evaluating the state of the insulating material. According to the technical scheme, the insulation polarization current information can be comprehensively and accurately extracted, and the insulation state can be evaluated.

The invention discloses a distributed current limiting method, device and system and a storage medium. The method comprises the following steps: periodically generating and broadcasting a concurrent suggestion interval based on a local operation state; concurrence suggestion intervals generated by the service instance and from other service instances are received, intersection operation is carried out, a global feasible interval is obtained, the upper limit is the minimum value of the upper limits of all the concurrence suggestion intervals, and the lower limit is the maximum value of the lower limits of all the concurrence suggestion intervals; and determining a local current limiting threshold based on the global feasible interval and the local dynamic weight. Each service instance receives the concurrence suggestion interval and then performs intersection operation to determine the global feasible interval, so that the upper limit is monotonically not increased and cannot be exceeded, the security invariant constraint chain is obtained, a central coordinator or a global synchronous clock is not needed, and the global concurrence quantity does not exceed the security upper limit under any network condition; and determining a local current-limiting threshold value based on the global feasible interval and the local dynamic weight, and realizing refined and adaptive current-limiting management.

The invention discloses a capacity adjustment method and device supporting cross-cluster, equipment and a medium. The method comprises the following steps: acquiring historical load data of a plurality of clusters, wherein the historical load data comprises historical node load data and historical container group unit load data; performing joint modeling based on each historical load data to obtain a load prediction model, deploying the load prediction model to each cluster, so that each cluster predicts future load data by using the load prediction model in combination with local current load data of each cluster, and reports the future load data; determining a capacity adjustment strategy according to the future load data, wherein the capacity adjustment strategy comprises a single-cluster capacity adjustment strategy and a cross-cluster collaborative capacity adjustment strategy; and transmitting a capacity adjustment instruction corresponding to the capacity adjustment strategy to a to-be-adjusted cluster in the clusters, so that the to-be-adjusted cluster performs capacity adjustment based on the capacity adjustment instruction. According to the scheme, the response speed of cluster capacity adjustment, the service scene fitness and the resource utilization rate can be improved.

The invention relates to a main and collateral channel nursing instrument based on bioelectricity, which is applied to the field of physical therapy and is characterized in that a magnetic current sensor is used for monitoring the electrifying current condition of each electrode plate and skin, and when a certain area of conductive hydrogel is in poor contact with the skin, the area can be subjected to micro-regulation and control; the area is pressed downwards through the skin pressing device to be in close contact with the skin, skin burning caused by too high local current density due to poor contact is effectively avoided, and when the energizing current of the electrode plate is too high, the conductive hydrogel can be quickly separated from the skin through the magnetic attraction effect of the electromagnetic ring on the hanging barrel, so that the skin is prevented from being damaged due to too high current; in addition, when power supply current of the nursing instrument body to all the electrode plates is too high, the negative voltage electrode box can directly fall off from the skin, and compared with a direct cutting-off mode in the prior art, the situation that equipment is damaged due to sudden interruption of the current can be effectively avoided.

The invention provides a method for evaluating the corrosion behavior of a small hole of an anticorrosive coating under the action of current. The method comprises the following steps: (1) acquiring corrosion kinetic parameters of a metal material; (2) constructing a parameterized multi-physical field model; (3) simulating a corrosion evolution process; (4) verifying the reliability of the model through experiments; and (5) constructing a comprehensive evaluation index. Obtaining corrosion kinetic parameters (corrosion potential, corrosion current density, Tafel slope and exchange current density) of the metal material through a potentiodynamic polarization curve test; the method comprises the following steps: preparing an anticorrosive coating metal sample with artificial pores, constructing a parameterized multi-physical field model by combining finite element software, and simulating local current density distribution and corrosion evolution under different pore diameters (greater than or equal to 2 mm), spacing (greater than or equal to 0 mm) and current density (greater than or equal to 0 A / m < 2 >); the reliability (corrosion potential error lt, 20%) of the model is verified through experiments, a comprehensive evaluation index is constructed based on multi-parameter sensitivity analysis, and rapid evaluation of the corrosion risk of the small hole of the anticorrosive coating and protection scheme optimization are achieved.

The invention relates to a coronal bionic adhesion array electrodeposition method. Real-time current density, temperature and fluid flow rate sampling data in the electrodeposition process are collected in different regions of each key region of a coronal tail end bionic adhesion array electroforming core mold structure; a multi-field space coupling index is utilized to output parameter sets of local current, pulse waveform, micro-area stirring and the like with spatial resolution and dynamic response in real time, and closed-loop fine management of multi-channel power supply and micro-area stirring linkage control is realized.

The invention discloses a back contact solar cell module which comprises a plurality of back contact solar cells which are arranged in a first direction, each back contact solar cell is provided with a main grid extending in a second direction and a fine grid extending in the first direction, the width of the main grid is larger than that of the fine grid, and the first direction is perpendicular to the second direction; and the interconnection wires extend along the first direction and connect the adjacent back contact solar cells in series. And the interconnection lead is vertical to the main grid. The number of the interconnection wires and the number of the main grids do not need to be kept consistent, so that when the number of the main grids of the battery is changed, assembly end welding equipment does not need to be greatly transformed synchronously, and the compatibility of the welding equipment is improved. In addition, the optimal design of the battery efficiency and the optimal design of the module end power can be achieved at the same time. According to the scheme disclosed by the invention, the interconnection wires are connected through the main grids, so that the mismatch of the local area of the battery caused by non-uniform local current or voltage is relieved, and the method is beneficial to reducing the caused power loss.

The invention discloses a cooperative control method for improving Tokamak radio frequency wave current driving locality, and the method mainly comprises the following steps: S1, according to a radial position where locality needs to be enhanced, heating narrow resonance layer electrons at the corresponding radial position through electron cyclotron resonance heating (ECRH); s2, ion cyclotron resonance heating (ICRH) is adjusted for regional heating, so that the radial position of an ICRH driving current main peak value coincides with the radial position of an ECRH current peak value; s3, using GENRAY and CQL3D programs to simulate low hybrid wave (LHW) and high harmonic fast wave (HHFW) combined current driving, calculating a momentum region corresponding to a synergistic effect in a momentum space, performing correlation analysis on the synergistic momentum region, wave emission parameters and current radial distribution, feeding back the parameter adjustment direction, and performing repeated iteration until required local current distribution is achieved; according to the invention, current driving with consideration of driving efficiency and locality control is realized, and the method is of great significance in enhancing the current distribution control capability, improving the constraint performance of plasma and obtaining longer constraint time and higher fusion power.

The invention discloses a simulation analysis method and system for an advanced packaging structure containing a high-density interconnection structure, and the method comprises the steps: carrying out the independent modeling of the high-density interconnection structure during the building of a model, and remarkably reducing the complexity of the model; in the grid division process, uniform grid division is adopted for a high-density interconnection area, the local current density and electromagnetic field distribution simulation precision are ensured, meanwhile, the overall calculation amount is reduced, and the super-large-scale calculation problem caused by traditional full-structure fine modeling is solved. According to the method, high-efficiency and high-precision simulation of high-density interconnection packaging is achieved, a systematic solution is provided for signal integrity, thermal management and reliability of the advanced packaging technology, and the method effectively solves the problem that in the prior art, calculation is too large and cannot be analyzed due to direct and accurate modeling. And the technical problem of inaccurate result caused by a simplified model approximate solution method is solved.

The invention relates to a back contact cell, a back contact laminated cell and a photovoltaic module, the back contact cell is provided with a first grid line extending along a first direction, the first grid line is provided with a plurality of welding spots, the distance between adjacent welding spots is a first distance A or a second distance B, and the first distance A is not equal to the second distance B; in the first direction, the distance between the welding spots is set to be a first distance A and a second distance B which are distributed in a staggered mode. According to the invention, the welding spots are periodically distributed in the form of A-B-A-B..., so that the uniformity of the current at each welding spot when the current on the first grid line flows to the welding strip through the welding spots can be improved, and the subfissure or failure of the back contact battery caused by local overheating of the back contact battery due to large local current can be prevented. And meanwhile, the transmission distance of the photo-generated current collected by the second grid line to the welding spot is short, so that the loss of the photo-generated current in the transmission process can be reduced, and the photoelectric conversion efficiency of the back contact battery can be improved.

The invention discloses a cooperative control system and method for an electrolytic hydrogen production electrolytic tank and an assembly rack, and belongs to the technical field of cooperative control, and the cooperative control system comprises an electrolytic hydrogen production first execution path determination module, a first cooperative control execution module and a second cooperative control execution module. The working parameters of the electrolytic cell and the posture of the assembly rack can be dynamically adjusted based on the electrode bubble stability index and the electrolytic cell operation imbalance index, so that the bubble shielding effect and local current density fluctuation are relieved in time, and the balance of the electrolysis states of left and right polar plates is ensured; and the scale factor and the continuous tracking monitoring duration are controlled by matching the adjusting rhythm, so that the self-adaptive monitoring and quick response to the running state of the electrolytic cell are realized. The operation stability of the electrolytic tank and the uniformity of the hydrogen yield are improved, and the electrolytic hydrogen production efficiency is optimized, the service life of equipment is prolonged and the self-adaptive intelligent control of the whole system is realized.

The invention relates to the technical field of solid-state battery safety protection, and discloses an internal short circuit emergency processing system based on a solid-state battery. The system comprises a state monitoring module, a short circuit feature extraction module, a risk assessment module and an emergency strategy generation module. The state monitoring module acquires voltage fluctuation data, temperature gradient distribution data and interface impedance change data of the solid-state battery in real time; the short-circuit feature extraction module analyzes and identifies a voltage sag rate, a thermal runaway propagation gradient and an ion migration abnormal coefficient through a time domain and a frequency domain; the risk assessment module calculates a dynamic risk level; and the emergency strategy generation module generates a local current limiting, regional isolation or global power-off strategy according to the risk level. The system realizes early recognition and graded response of the internal short circuit of the solid-state battery, and improves the safety and reliability of the battery system.

The invention discloses a negative current collector of a negative-electrode-free sodium metal battery as well as a preparation method and application of the negative current collector, carbon spheres with spherical hollow cavities and open through holes are prepared, a current collector base material is coated with the carbon spheres to serve as the negative current collector, and the prepared negative current collector is used for preparing the negative-electrode-free sodium metal battery. The closed cavity in the hollow carbon sphere provides a confinement space for sodium storage, and the volume change in the circulation process can be effectively buffered. The open through holes in the shell of the hollow carbon sphere form a high-speed network for ion transmission, so that the surface migration kinetics of sodium ions is greatly improved, and uniform deposition is promoted. According to the negative current collector, the local current density is reduced synergistically, and sodium is guided to deposit in the sphere preferentially, so that the generation of dead sodium in the circulation process is reduced, and the coulombic efficiency of the negative-electrode-free sodium metal battery is improved.

The present invention relates to the field of semiconductor manufacturing technology, and relates to a light-emitting diode (LED) comprising a semiconductor stack, the semiconductor stack comprising a first semiconductor layer, a light-emitting layer, and a second semiconductor layer stacked in sequence, the semiconductor stack having a plurality of through holes, each of which extends downward from the second semiconductor layer to the first semiconductor layer. When viewed from above the LED toward the semiconductor stack, an xy coordinate system is established with the center of the semiconductor stack as the origin, with a first pattern formed by offsetting the through holes by a first distance on either side of the x-axis and a second distance on either side of the y-axis, and a second pattern formed by offsetting the through holes by a third distance on either side of the x-axis and a fourth distance on either side of the y-axis, wherein a first spacing between the through holes within the first pattern is greater than a second spacing between the through holes between the first and second patterns. This enhances carrier conduction capability, equalizes local current density, avoids thermal effects caused by current concentration, prevents direct electrical damage from puncturing a PN junction, and improves the ESD resistance of the LED.

The embodiment of the invention provides a three-dimensional vertical porous lithium metal negative electrode, a preparation method and a battery, a periodic three-dimensional vertical hole array is arranged on the surface of one side of lithium metal with the thickness of 30-50 [mu] m, and the depth of the three-dimensional vertical holes is 10-30 [mu] m; the content and distribution of carbon nanotubes in an electroplated metal layer are adjusted through three-section composite electrodeposition, so that on one hand, rich ion / electron transmission channels are provided, the local current density is remarkably reduced, and the electrochemical reaction kinetics is accelerated; an electric field and an ion concentration field formed on the inner wall of the hole can guide lithium ions to preferentially deposit at the bottom and in the hole, so that disordered growth of lithium dendrites on the surface is effectively inhibited, and finally, a volume expansion buffer space is provided; and moreover, a space is reserved for deposition of lithium in the circulation process, and stress can be dispersed and absorbed.

The utility model discloses a six-groove cup-shaped electrode contact seat structure and a vacuum arc-extinguishing chamber, a first electrode contact seat and a second electrode contact seat are respectively provided with three first chutes which are inclined towards the same direction, and the chutes provide multi-element transmission channels which are clear in guiding for current, so that the current is dispersed, multiple strands of current flow in parallel, and the current transmission efficiency is improved. And meanwhile, through the interval length difference between the first skewed slot and the second skewed slot, the situation that the flow guide section at the root of the skewed slot is limited, the local current density is too large, and the resistance is too high is avoided, and the overall resistance of the loop is reduced in an all-around mode. On the basis of an existing six-groove cup-shaped longitudinal magnetic electrode, through the differentiated long and short contact finger structure design, on the basis of ensuring the on-off performance, the diversion of the electrode is effectively improved, and the requirement of a low-resistance vacuum arc-extinguishing chamber is met.

One or more faulted conductors are identified in a power transmission system having at least two power-transmitting conductors and a fault location is determined. The methods for identifying faulted connectors and determining fault location include steps of monitoring current signals which are representative of currents in the conductors at a generally common location within the power transmission system; filtering the current signals; determining a maximum rate of change of each filtered current signal within a predetermined time interval after the fault event has commenced; and calculating a ratio of a pair of the maximum rates of change of the filtered current signals. For fault classification, the ratio is compared against a discrimination factor to identify the one or more faulted conductors. For fault location, the calculated ratio is compared against the calibration data to determine the distance from the connection terminal of the faulted conductor to the fault location.

The invention provides a solid-state electrolyte with a bionic microstructure interface, a preparation method thereof and a solid-state battery, the solid-state electrolyte with the bionic microstructure interface comprises a solid-state electrolyte matrix, and at least one side surface of the solid-state electrolyte matrix is provided with a bionic microgroove structure. The bionic micro-groove structure is a tree-root-shaped fractal topology network structure, and comprises a main groove and a secondary groove which is branched and extends from the main groove; the ratio of the depth to the width of the main groove and the ratio of the depth to the width of the secondary groove are both larger than or equal to 0.3. The bionic micro-groove structure has a tree-root-shaped fractal structure, a three-dimensional microstructure of a multi-stage interconnection network is formed on the surface of the solid electrolyte, the solid-solid contact area can be effectively increased, the local current density can be reduced, and deposited lithium can be mechanically anchored, so that the purposes of low interface impedance and efficient dendritic crystal suppression are synchronously realized.

The utility model relates to a movable spring assembly and a relay. The movable spring assembly comprises a movable contact, a current-carrying piece and a movable spring piece, the movable contact is connected with the movable spring piece through the current-carrying piece, the connecting part of the movable contact and the current-carrying piece and the connecting part of the movable spring piece and the current-carrying piece are distributed at intervals, and the movable contact is used for being in contact with a static contact assembly in the relay; the end, close to the current-carrying piece, of the movable reed can move relative to the static contact assembly, so that the movable contact can move in the direction close to or away from the static contact assembly. The movable contact spring provides good elastic deformation capacity for the movable contact spring assembly, the local current-carrying density of the thin-sheet movable contact spring is high, so that local heating of the movable contact spring is serious, a current-carrying piece is arranged between the movable contact spring and the movable contact, the movable contact is made to be far away from the movable contact spring, and the influence of heating of the movable contact spring on the movable contact is reduced. The movable contact is connected with the movable reed through the current-carrying member, and the current-carrying member is large in current-carrying density and high in current-carrying capability, so that the temperature rise near the movable contact is reduced.

The invention relates to the technical field of battery manufacturing, in particular to a negative plate for improving lithium precipitation at corners, a preparation method of the negative plate and a battery cell, the negative plate comprises a base material, the base material comprises at least one first corner area and at least one first non-corner area, and the first corner areas and the first non-corner areas are alternately distributed; a plurality of flow guide bulge arrays which are uniformly distributed at intervals are arranged on the surface of at least one side of the first corner area, and each flow guide bulge array comprises a plurality of bulge parts which are distributed in an array. Through the design of the diversion bulge array, the local conductive contact area is increased, the current density at the corner is dispersed, the local current density concentration at the corner area is inhibited, and the lithium ion battery is prevented from separating lithium in the corner area under a fast charge or low-temperature ring.

The utility model discloses a composite pole piece and a full-tab high-nickel cylindrical battery cell passing a needling test at a lower temperature, the composite pole piece comprises foil layers, a macromolecule base film layer, an electrode slurry layer and a welding foil layer, the two end surfaces of the macromolecule base film layer are respectively provided with one foil layer, and the electrode slurry layer is provided with one welding foil layer. An electrode slurry layer and an empty foil area are arranged on the working end face of the foil layer; the welding end of the welding foil layer is welded to the empty foil area, and the free end of the welding foil layer exceeds the foil layer and is exposed out of the foil layer. According to the utility model, the structure of the battery cell pole piece is changed, the composite aluminum foil is used as a base material, the two end surfaces of the composite aluminum foil are coated with the positive active material, and the empty foil area of the composite aluminum foil is welded with the common aluminum foil extension tab area; after the cell is punctured, the local current density is sharply increased, so that the temperature of a punctured point rises, the macromolecular base film layer is melted and shrunk, and the metal coating on the macromolecular base film layer is pulled away from a punctured body to form a physical isolation strip, so that the short-circuit resistance is improved to a kiloohm level, the short-circuit current is inhibited, and the needling passing rate of the cell is improved.

The invention discloses a power grid grounding simulation method and system based on multi-parameter coupling modeling. The method comprises the following steps: acquiring soil resistivity, lightning stroke current waveform data and morphological structure information of a grounding electrode at different depths and geographic positions; constructing a recursive coupling current equation based on time history feedback, and recursively calculating a local grounding current distribution function at the current moment and at the spatial position by adopting a multi-channel dynamic weighting mechanism based on the recursive coupling current equation; fractal dimensions are dynamically calculated according to the soil resistivity and the morphological structure information of the grounding electrode, and a fractal current distribution function is established based on the fractal dimensions and a local grounding current distribution function; the local current value and the fractal current distribution function are fused, the total grounding current is dynamically calculated in a time integration mode, and step voltage is calculated in combination with a current response function, the soil resistivity and the lightning stroke waveform; and determining the state of the grid grounding system based on the total grounding current and the step voltage.

The invention discloses a sodium metal negative electrode material with a three-dimensional gradient sodium-philic interface as well as a preparation method and application of the sodium metal negative electrode material, and belongs to the technical field of sodium metal batteries. According to the sodium metal negative electrode material and the preparation method thereof, a metal net is coated with sodium-philic metal with concentration gradient through an electro-deposition method, then the surface of the sodium metal is covered with the sodium-philic metal, and the sodium metal negative electrode with the three-dimensional gradient sodium-philic interface can be obtained; the metal sodium can be guided to realize uniform and compact deposition from bottom to top, the large specific surface area is beneficial to reducing the local current density, the sufficient space reserved by the metal grid can realize high-capacity sodium ion deposition, meanwhile, the volume expansion and the structure failure of the electrode are avoided, and finally, dendrite-free growth and excellent cycle life of the sodium metal negative electrode are realized. The preparation method has the characteristics of simple preparation process and low requirements on preparation environment.

The application discloses a kind of distributed current limiting method, device, system and storage medium, including periodically generating and broadcasting concurrent suggestion interval based on local running state;Receive concurrent suggestion interval generated by itself and from other service instances and carry out intersection operation, obtain global feasible interval, upper limit is the minimum value of the upper limit of all concurrent suggestion intervals, lower limit is the maximum value of the lower limit of all concurrent suggestion intervals;Determine local current limiting threshold based on global feasible interval and local dynamic weight.The intersection operation is carried out after each service instance of the application receives concurrent suggestion interval to determine global feasible interval, ensure that upper limit is monotonically not increased and upper limit cannot be exceeded, obtain safe invariant constraint chain, without central coordinator or global synchronous clock, in any network condition, guarantee that global concurrency is not more than safe upper limit, determine local current limiting threshold based on global feasible interval and local dynamic weight, realize fine, adaptive current limiting management.

The application discloses a hanging neck type massage instrument, which comprises a machine body, a liquid storage tank, electrode pieces, a pipeline component and a control piece. Each of the electrode pieces is provided with a liquid outlet hole. The pipeline component comprises a first branch pipeline and a second branch pipeline. The first branch pipeline is connected with the liquid storage cavity and the liquid outlet hole of one of the electrode pieces, and the second branch pipeline is connected with the liquid storage cavity and the liquid outlet hole of the other electrode piece. In the first working state, the control piece cuts off the liquid flow in the first branch pipeline and / or the second branch pipeline, and makes the conductive liquid discharged from the electrode piece connected with the first branch pipeline and the conductive liquid discharged from the electrode piece connected with the second branch pipeline be insulated from each other. In the second working state, the conductive liquid in the liquid storage cavity is discharged from the corresponding liquid outlet holes through the first branch pipeline and the second branch pipeline. The hanging neck type massage instrument can effectively eliminate the stinging feeling caused by the excessive local current.

The utility model relates to the technical field of breast pumps, in particular to a heating breast pump which comprises a cover body and a main machine connected with the cover body, the cover body is provided with a heating assembly used for heating and a cover body connector connected with the heating assembly, and the main machine is provided with a main machine connector communicated with the cover body connector. And the cover body connector and / or the host connector are / is provided with an annular conducting end for increasing the conducting contact area. According to the utility model, the conductive contact area is increased by arranging the annular conductive connection end, so that a wider and stable path can be provided when current passes through, the current density of the current at a contact point can be effectively reduced, the situation that the contact point is broken down due to overlarge local current is avoided, the current can continuously and stably pass through the connector, and the service life of the connector is prolonged. Normal power-on work of the heating assembly is maintained, and the problem of heating function failure caused by poor contact is reduced.