1864 results about "Contact resistance" patented technology

The invention provides a multi-channel contact resistance intelligent test device and method, the contact resistance intelligent test device is integrated with a plurality of different types of resistance test channels, and the resistance test channels comprise a conduction test channel, a static resistance test channel and a dynamic resistance test channel. The device comprises an upper control module used for receiving a channel test parameter of a contact resistor and generating a channel selection test instruction based on the channel test parameter; the multi-channel switching module switches to a target test channel of a corresponding type based on the channel selection test instruction; the resistance measurement module applies current of a corresponding type according to the type of the target test channel, collects the voltage of the target test channel, and obtains a resistance value according to the voltage and the current; and the signal processing module performs noise reduction processing on the resistance value to obtain a target resistance value, and evaluates the change trend of the target resistance value, so that the problems of low test efficiency, dynamic data missing and personal error accumulation of a traditional method are solved, and the subjective deviation of manual interpretation is eliminated.

The invention discloses an electric connector fault prediction method, and the method comprises the steps: synchronously obtaining multiple types of time series data of a contact area of a target electric connector in a preset time window based on a preset data collection device, and the time series data comprise temperature spatial and temporal distribution time series data, contact resistance transient time series data and a surface image sequence; performing feature analysis on the multi-source time sequence data by using a preset time sequence coupling sign extraction mechanism to obtain a multi-source phase change feature vector of the target electric connector in the current time window; inputting the multi-source phase change feature vector into a pre-trained electric connector health state prediction model, and outputting a prediction result of the health state of the target connector at the current moment, including a health state index; and performing differential early warning based on the predicted health state index of the target connector. Therefore, early and quantitative accurate prediction of the state of the electric connector is realized.

The invention belongs to the technical field of power equipment state monitoring, and discloses a cable branch box operation state intelligent evaluation system based on multi-sensor fusion, which comprises a state acquisition module used for acquiring a partial discharge signal, a voltage fluctuation signal, a terminal temperature signal and a terminal contact resistance signal of a cable branch box in an operation process, constructing a multi-source operation state parameter set of the cable branch box through time synchronization and physical quantity normalization processing; the mutual coupling analysis module is used for performing transient correlation deduction on the partial discharge signal and the corresponding voltage fluctuation signal based on the multi-source operation state parameter set to obtain a partial discharge-voltage coupling amount; when the partial discharge-voltage coupling amount exceeds a preset partial discharge-voltage coupling amount threshold value, determining that partial discharge abnormity caused by insulation degradation exists in the cable branch box; comprehensive and accurate evaluation of the operation state of the cable branch box is realized, and reliable support is provided for safe operation and maintenance of equipment.

The invention relates to the technical field of nano-probe detection, and particularly discloses a nano-probe test system for feeding back contact force in real time, comprising the following modules: a probe execution module comprising a nano-probe and a piezoelectric ceramic driver, the nano-probe realizing three-dimensional micro-displacement and establishing controllable contact with a wafer; the multi-dimensional signal sensing module is used for synchronously acquiring a contact resistance signal and a nanoprobe deformation signal; the data processing and control module is used for realizing signal analysis, force value calculation and driving control of a contact resistance signal and a nanoprobe deformation signal; the man-machine interaction module comprises a touch display screen and a real-time data recorder and is used for realizing visualization of force signals; the data processing and control module carries out cooperative analysis on the contact resistance signal and the nanoprobe deformation signal obtained by the multi-dimensional signal sensing module to obtain the real-time contact force of the nanoprobe and the wafer. The system solves the problem that a traditional nanoprobe detection system cannot feed back the contact force in real time.

The invention relates to the technical field of electronic component testing for investigating or analyzing internal microstructures and physical properties of materials by utilizing an electrical means, and discloses an online testing and analyzing method for physical properties of electronic component materials, which comprises the following steps of: constructing a composite excitation signal formed by linearly superposing a main carrier voltage and a perturbation wave voltage; applying the signal to a to-be-tested electronic component and acquiring response current; and extracting an intermodulation current amplitude at an intermodulation frequency point in the frequency spectrum of which the linear response interval is excluded, calculating a nonlinear response coefficient of the material in combination with the excitation amplitude, and comparing the nonlinear response coefficient with a preset degradation threshold so as to judge whether the nonlinear response coefficient is qualified or not. By extracting intermodulation components which cannot be generated by linear contact resistance, physical isolation of external contact noise in a frequency domain is realized, and the problem that contact resistance fluctuation and material intrinsic aging cannot be distinguished in a traditional linear impedance test is solved.

The invention relates to the technical field of circuit breaker equipment, in particular to a fault type identification method based on a circuit breaker intelligent algorithm. Comprising the steps of collecting environment temperature data of an environment where the circuit breaker is located in real time through a temperature sensor, dynamically monitoring mechanical wear degree data of a contact and an operating mechanism of the circuit breaker through a displacement sensor, and obtaining surrounding electromagnetic interference intensity data through an electromagnetic interference detection module; inputting the environment temperature data, the mechanical wear degree data and the electromagnetic interference intensity data to a processor integrated with a multi-factor dynamic coupling model, wherein the processor calculates actual contact resistance, interfered actual current and fault characteristic values based on the multi-factor dynamic coupling model; the processor identifies the fault type of the circuit breaker according to the size and the change range of the fault characteristic value in combination with a preset fault type judgment rule; the method can effectively cope with the influence of the factors, and improves the fault type recognition accuracy.

The invention relates to a method for improving epitaxial growth quality of a tunnel junction cascade semiconductor laser. The invention innovatively provides a strain superlattice gradient repair technology. By designing a low-temperature low-speed nucleation-high-temperature high-speed epitaxy composite growth mode, a periodic superlattice buffer layer is introduced to a tunnel junction interface. Wherein lattice strain relaxation is achieved at the rate of 0.5-2 / s in the low-temperature stage, defect coverage is completed at the rate of 4-8 / s in the high-temperature stage, and dislocation line bending is terminated on a superlattice interface through thermodynamic regulation and control. Compared with the traditional process, the scheme can obviously improve the crystal quality, and does not increase the specific contact resistance of the tunnel junction interface.

The invention provides a low-on-resistance shield gate trench MOSFET fault diagnosis method and system, and relates to the technical field of MOSFET fault diagnosis, and the method comprises the steps: applying preset transient electrical excitation to a contact interface of a probe and a wafer bonding pad and an MOSFET before the steady-state on resistance of the MOSFET is measured; according to the obtained electrical response information of the contact interface and the MOSFET under each transient electrical excitation effect, constructing a transient feature vector; analyzing the transient feature vector according to a preset discrimination rule for contact part abnormity and a discrimination rule for device structure defects to determine whether an abnormity source is the contact part abnormity or the device structure defects; according to the determined abnormal source, the measured on-resistance value is adjusted, and the problem that the test system misjudges that the on-resistance of the device is abnormally increased due to instantaneous fluctuation of the contact resistance caused by the change of the microscopic geometrical shape of the tip of the probe is solved.

The invention relates to the technical field of electronic connector performance monitoring, in particular to a connector performance detection method, and aims to solve the problem that a method for realizing performance early warning through dynamic correlation analysis of vibration signals and contact resistance in the prior art is not suitable for an L-shaped pin connector without a sheath. According to the method, micro-strain signals and contact resistance signals are synchronously collected, analysis time periods are divided in combination with plugging events, the plastic deformation accumulation degree and signal response delay characteristics are quantitatively evaluated, performance degradation coefficients are generated through fusion, and trend analysis is carried out; the problem that the relevance between the mechanical deformation and the electrical performance cannot be quantitatively evaluated in the prior art is effectively solved, and the method has the advantages of realizing early warning, improving the monitoring accuracy and reducing the maintenance cost.

The invention relates to the field of lightning arrester parameter measurement, in particular to a lightning arrester parameter measurement system and method.The lightning arrester parameter measurement system comprises an induction unit, a detection unit, a data processing unit and a control and positioning unit and is used for generating and focusing laser on the surface of a lightning arrester, collecting an electrical signal and an optical signal of plasma and sending the electrical signal and the optical signal to a processor; the feature quantity is obtained through a feature extraction algorithm, and core parameters of the inversion lightning arrester are calculated through mechanical learning. Plasma is generated through laser focusing, reduction of errors caused by direct electrical connection and contact resistance with a lightning arrester is avoided, the problems of potential safety hazards and interference of traditional contact type measurement are solved, laser focus global scanning, real-time dynamic monitoring and efficient measurement are achieved through the three-dimensional electric translation platform, and the measurement precision is improved. All key areas on the surface of the lightning arrester are covered, compared with single parameter inversion in the prior art, multiple parameters and microscopic parameters are considered, and the prediction precision of key core parameters such as insulation resistance based on the random forest model is further improved.

The invention relates to the technical field of electrical fault positioning, in particular to an urban rail train relay state online monitoring method and system. The specific implementation process comprises the following steps: collecting coil current, contact voltage, load current and environment vibration signals by using an electrical sensor group; when the coil current is subjected to step change, intercepting an electromechanical characteristic data set; arc energy and contact resistance fluctuation characteristics are calculated, correlation analysis is carried out in combination with environment vibration signals, and passive fluctuation and active fluctuation are distinguished; and establishing a multi-factor health degree evaluation model, dynamically adjusting the arc energy and the weight coefficient of the contact resistance according to the magnitude of the load current and the vibration intensity, monitoring the health state of the relay in real time, and predicting the residual life. Through multi-dimensional data synchronous acquisition and vibration decoupling, the interference of mechanical vibration on electrical performance monitoring is effectively eliminated, the problem that a dynamic working condition cannot be reproduced in an off-line test is improved, and the accuracy of relay state evaluation and service life prediction is remarkably improved.

The invention discloses an SRAM (Static Random Access Memory) memory cell, a static random access memory and a preparation method thereof, and belongs to the field of semiconductors. Channel directions of two transmission gate transistors are set as a first direction, channel directions of two pull-up transistors are set as a second direction, and channel directions of two pull-down transistors are set as a third direction; the third direction and the first direction are crystal orientations of the same family, and the two pull-up transistors are arranged in a sinking manner; active regions of the pull-up transistor and other transistors are staggered so as to improve the heat dissipation capability; in order to manufacture the structure, a corresponding preparation method is designed, in the preparation process, the grid electrode of the pull-up transistor is stepped, so that the grid electrode of the pull-up transistor can be connected with the active region of the transmission grid transistor through a metal silicification technology, the contact resistance is greatly reduced, and the performance of the device is improved. Therefore, the performance of the whole device is improved, and the read-write speed is higher than that of the prior art under the same condition.

The invention relates to the technical field of crane electrical power supply, in particular to a crane sliding contact line power supply method which comprises the following steps: S1, monitoring the dynamic deformation quantity of a sliding contact line in real time, and obtaining the real-time contact resistance value of a current collector contact surface; s2, calculating the displacement compensation amount of the sliding contact line connector; s3, dynamically generating target contact pressure and transverse offset of the current collector; s4, a current collector executing mechanism is controlled to adjust the contact pressure and the transverse position; s5, if the contact resistance value is reduced to be below a preset threshold value and the deformation quantity fluctuation range is less than or equal to 0.5 mm, determining that the state is a stable power supply state; and S6, predicting a future deformation inflection point of the sliding contact line, and triggering an active compensation instruction before the inflection point. According to the invention, by constructing the slide wire power supply method integrating real-time monitoring, dynamic compensation and trend prediction, accurate adjustment and foresight control of the problem of unstable contact caused by deformation of the slide wire are realized, and the stability of the power supply system is improved.

The invention discloses high-voltage wiring harness connector terminal fretting wear test equipment which comprises an equipment base, a high-frequency vibration exciter and a lifting platform are mounted on the equipment base, and a mounting platform is arranged at the top of the lifting platform; a left test piece mounting loading mechanism and a right test piece mounting force measuring device are arranged on the mounting platform. The device can realize a multi-physics field coupling test, current-carrying friction and arc erosion of an electric contact surface in a real working condition are simulated by combining a current load with high-frequency mechanical wear, and the electric-mechanical coupling wear characteristic of a new energy automobile charging terminal is accurately reproduced. The device supports the dynamic adjustment of normal load, simulates the contact pressure change of the left and right test samples of the test terminal in the plugging process through the test sample pin and the test sample jack, can be used for researching the relevance between the fretting wear and the contact resistance of the test terminal under different loads, and realizes the test of the terminal under complex working conditions in a laboratory environment. The test process is convenient, efficient and accurate, and the test cost and the test period are greatly reduced.

The invention discloses a power type negative temperature coefficient thermistor and method for suppressing surge current, and relates to the technical field of negative temperature coefficient thermistors, the thermistor comprises a core body and pins, the pins are respectively arranged on electrodes on two sides of the core body by adopting a multi-contact-surface structure, and the pins are arranged on the two sides of the core body. The core body is made of a Mn-Co-Ni-La oxide with a nano composite gradient structure; the Mn-Co-Ni-La oxide with the nano-composite gradient structure determines the upper limits of core capabilities such as surge suppression, wide temperature stability and low power consumption of the thermistor, and the redesign of the pin is the key of performance transfer, so that the electrical properties (low contact resistance and high surge tolerance) of the Mn-Co-Ni-La oxide with the nano-composite gradient structure are not counteracted by structural defects; the arrangement of the bracket prevents the Mn-Co-Ni-La oxide with the nano-composite gradient structure from losing the effect due to heat accumulation and physical damage through thermal management and mechanical protection, and the three components supplement one another and cooperate with one another, so that the performance of the thermistor of the Mn-Co-Ni-La oxide with the nano-composite gradient structure is guaranteed.

The invention discloses a cover plate assembly, a battery and a battery module, and belongs to the technical field of power batteries. The cover plate assembly comprises a cover plate piece and a pole piece, the cover plate piece is provided with a mounting hole, and the pole piece is positioned in the mounting hole and is insulated from the cover plate piece; a groove structure is arranged on the end face, located on the inner side of the cover plate piece, of the pole piece, the groove structure is used for containing a tab of a battery cell, and the inner side wall of the groove structure is connected with the tab in a welded mode. According to the cover plate assembly, the current conduction path can be greatly shortened, and the connection impedance and the contact resistance of the battery are reduced. Meanwhile, the cover plate assembly reduces the potential failure risk caused by multi-component assembly and multiple welding.

A heat-transfer component defines a thermal-interface surface and has a composite thermal-interface material bonded to the thermal-interface surface. The composite thermal-interface material comprises a particulate filler material dispersed within a metallic carrier material having a solid-to-liquid phase-change temperature between about 60° C. and about 90° C. With a thermal-interface material bonded to the thermal-interface surface, the thermal-contact resistance between the thermal-interface material and the heat-transfer component can be reduced or substantially eliminated compared to conventional thermal-interface materials, including conventional metallic thermal-interface materials. The particulate filler material can have a higher bulk thermal conductivity than that of the metallic carrier material and can be wetted by the metallic carrier material, providing a bulk thermal conductivity of the composite thermal-interface material that is higher than that of the carrier material without the particulate filler material. Also disclosed are electrical devices having a heat generating component cooled by such a heat-transfer component.

A method for operating a semiconductor device, the method according to the present invention includes applying a first bias voltage to a gate pattern, and storing first data in response to the first bias voltage, wherein contact resistance between an electrode pattern and a ferroelectric pattern is changed from a first resistance state to a second resistance state in response to the first bias voltage, the first data is stored based on the change from the first resistance state to the second resistance state, and the ferroelectric pattern is interposed between the gate pattern and the electrode pattern.

The invention discloses a wiring terminal wiring optimization method and system, particularly relates to the technical field of electrical connection conductor crimping, and is used for solving the hidden circuit break risk and the axial conductive uniformity control problem caused by non-uniform interlayer stress distribution in multi-strand stranded wire crimping. The method comprises the following steps: acquiring structural parameters of a conductor and a crimping cavity and identifying a multi-strand stranded wire structure; analyzing interlayer friction state characteristics in the crimping process and microscopic deformation characteristics after crimping; formulating a step-by-step crimping force applying strategy based on double characteristics; a conductor depth layer contact resistance discrete coefficient is calculated after the first step of crimping operation is executed; when the discrete coefficient exceeds a threshold value, a second-step crimping force strategy is dynamically adjusted and executed; by establishing an interlayer stress-deformation-resistance discreteness closed-loop control link, microcosmic displacement accumulation of a conductor layer under a vibration working condition is effectively avoided, and accurate regulation and control of axial conductivity uniformity are realized.

The invention relates to the technical field of charging switching control, in particular to a dynamic switching system for cooperative work of wireless charging and wired charging, which performs node modeling and edge weight propagation on multiple parameters such as magnetic field intensity, current fluctuation ratio, contact resistance and temperature threshold through a graph neural network. Structured expression and dynamic updating of a nonlinear coupling relation among parameters are achieved, abnormal feature aggregation and channel state characterization are more refined, fuzzy reasoning and weight adjustment are conducted on multiple variables such as power output, the heat growth rate, the voltage drop rate and the energy efficiency ratio through fuzzy logic control, the stability of a channel priority sequence is enhanced, and the stability of the channel priority sequence is improved. Through dynamic detection of power curve intersection points and transition section time sequence calculation, continuous power distribution is converted into a smooth function interval, instantaneous energy abrupt change during switching is reduced, closed-loop correction of multi-period signals is achieved, and the system keeps stable operation and energy efficiency output consistency under high-dimensional parameter disturbance.

The invention relates to a contact resistance and state detection method for an electromagnetic switch device of a railway vehicle, and the method comprises the steps: injecting an AC signal into a to-be-detected contact of the electromagnetic switch device, and then collecting an AC voltage signal of the to-be-detected contact; calculating a first resistance value of the contact to be measured according to the acquired alternating current signal and the alternating voltage signal; and further comparing the resistance value obtained by detecting the contact to be detected with a pre-configured resistance scale value, and judging whether the contact to be detected is in a good state or not according to a comparison result. On-line detection of the contact resistance of the electromagnetic switch device can be realized, and on the basis, judgment of the electricity storage state can be realized, so that the working safety and reliability of equipment are improved.

The invention relates to the technical field of charge and discharge detection, and discloses a multichannel EIS charge and discharge in-situ test system and method, and the system comprises a DC charge and discharge module which is used for carrying out the constant-current, constant-voltage or cyclic charge and discharge test of a battery; the alternating current impedance test module is connected in parallel with the direct current charging and discharging module and is used for applying an alternating current disturbance signal to the battery and collecting impedance response in the charging and discharging process; and the unified clock module is used for providing a synchronous triggering reference signal for the direct current charging and discharging module and the alternating current impedance test module. The direct current charging and discharging module and the alternating current impedance test module are designed to be of a parallel connection normally-connected structure, no relay switching is needed, continuous and uninterrupted online EIS test in the charging and discharging process is achieved, contact resistance drift and transient errors caused by physical circuit switching in a traditional scheme are effectively avoided, and the reliability of the EIS test is improved. And the stability and repeatability of the test are obviously improved.

The invention relates to the technical field of power equipment operation and maintenance, in particular to an electric energy metering box fault detection method, and aims to solve the problems that in the prior art, a single parameter monitoring mode cannot recognize progressive temperature rise caused by contact resistance degradation, and the temperature only has a slow rising trend at the initial stage of terminal oxidation or bolt loosening, so that the fault detection efficiency is low. And when an alarm condition is reached, a fault critical state is often approached. According to the invention, early recognition of the root of contact resistance degradation is realized, early warning can be triggered at the initial stage of terminal oxidation or loosening, and delay caused by waiting for temperature exceeding a threshold in a traditional scheme is avoided. The multi-parameter collaborative model dynamically optimizes the delay time according to the real-time working condition, effectively inhibits false alarm in a humid and changeable southern environment, avoids missing alarm in a dry and heat-dissipating northern scene, and significantly improves the detection reliability in different regional environments. The grading early warning mechanism matches the response level according to the degradation degree, so that the operation and maintenance resources can process high-risk faults preferentially, and the maintenance efficiency of the power equipment is optimized.

The invention provides a preparation method of a carbon composite current collector without a macromolecular adhesive. The method ingeniously utilizes charge transfer and pi-pi interaction between the conductive carbon material and the auxiliary agent to realize infiltration of the conductive carbon material, and assists uniform mixing of the conductive carbon material to finally form the paste slurry. And after the pasty slurry is pressed and washed, the carbon composite current collector with uniform thickness and good conductivity is constructed on the surface of a substrate. In the carbon film, the carbon nanotubes with the one-dimensional structure construct a conductive network, the graphite powder or graphene with the two-dimensional structure plays a role in bonding the carbon tubes under high voltage by utilizing the flexibility of the graphite powder or graphene and through pi-pi interaction, the contact resistance between the carbon tubes is reduced, and the mechanical property of the composite current collector is enhanced. The preparation method is simple in process and low in cost, the prepared carbon composite current collector is outstanding in chloride ion corrosion resistance, and powerful guarantee is provided for performance improvement and long-term stable operation of a chloride ion-containing water system energy storage device.

The invention belongs to the technical field of electrical equipment safety monitoring, and provides an intelligent wire and cable distributed optical fiber temperature measurement early warning method and system, and the method comprises the steps: laying a distributed optical fiber temperature sensor network along a cable, and synchronously demodulating the temperature and strain information based on a distributed optical fiber sensing principle; the temperature, the strain information and the load current are uploaded to a cloud platform through a wireless communication module; operating a time-space fusion diagnosis model driven by a cable physical mechanism on a cloud platform to distinguish and position an abnormal overheating section caused by a current Joule heating effect, insulation loss or contact resistance dramatic increase; and after the abnormity is confirmed, the cloud platform generates a control instruction for the abnormal overheating section to cut off power supply, and an intelligent self-healing process can be started. According to the invention, physical root identification, accurate positioning and safe self-healing of the cable overheating fault are realized, and the safety of cable operation is greatly improved.

The invention relates to a method and device for judging whether a grounding mechanism of a switch cabinet works normally or not, a grounding resistance online measurement module is arranged on a grounding knife switch structure of the switch cabinet, the resistance value of the grounding resistance is detected in real time, and whether grounding is correct or not is judged by judging whether the grounding resistance is in a normal range or not; the grounding resistance on-line measurement module is internally provided with a switch-on grounding state detection algorithm based on deep fusion of a neural network and Kalman filtering. According to the method, multiple factors such as the cumulative closing times, the contact resistance change rate, the oxidation coefficient, meteorological interference and the temperature are comprehensively considered, a dual-network self-adaptive modeling and federated Kalman filtering framework is adopted, high robustness and nonlinear processing capacity are achieved, and whether the switch cabinet grounding mechanism works normally or not is judged with high accuracy.

The invention provides a phosphorus emitter passivation structure and a preparation method thereof, the passivation structure comprises a phosphorus emitter, the phosphorus emitter comprises silicon, phosphorus, hydrogen, carbon and / or nitrogen, the surface of the phosphorus emitter is provided with a nano silicon oxide layer, the phosphorus emitter comprises an electric injection region and a doped region, the electric injection region is provided with a conductive layer at a corresponding position, and the doped region is provided with a conductive layer at a corresponding position. The conductive layer is used for being connected with a metal electrode, a passivation anti-reflection layer is arranged at the corresponding position of the doped region, and the carbon and / or nitrogen concentration of the electric injection region is higher than that of the electric injection region. Partitioned passivation is performed on the surface of the phosphorus emitter, and carbon and / or nitrogen atoms are introduced into the doped region, so that the interface passivation effect is improved; the electric injection region is not subjected to carbon and nitrogen doping and is not provided with a passive film, so that the influence of passivation on the contact resistivity is reduced; a conductive channel is introduced into the electric injection region for electric injection, so that the defect state of the phosphorus emitter can be further eliminated, and the recombination current is reduced.

The invention relates to the technical field of polycrystalline silicon preparation, and discloses a polycrystalline silicon reduction furnace intelligent regulation and control system based on multi-parameter prediction, which is based on full-dimensional data such as current, raw material purity, silicon rod temperature and the like acquired by a multi-parameter sensing module, and realizes the intelligent regulation and control of a polycrystalline silicon reduction furnace through a burst interference quantification sub-module in a bidirectional linkage fusion prediction module. The deviation entropy quantification interference intensity of the multi-parameter change rate is calculated, migration learning emergency correction terms are synchronously called to dynamically compensate prediction errors, meanwhile, the one-way dependence defect is broken through, and a dynamic physical boundary is provided for a data driving prediction constraint module through physics, electrode contact resistance and in-furnace heat balance parameters; the NMPC module takes a bidirectional fusion high-precision predicted value as a target, solves a multi-target optimization control sequence and issues and executes the multi-target optimization control sequence, and the closed-loop iterative optimization module synchronously updates physical and data model parameters through incremental learning on the basis of an actual regulation and control effect, so that the problems of current regulation lag and formula parameter stiffness are solved, and long-term stable operation of the reduction furnace is supported.

The invention relates to a photovoltaic cell and a preparation method of the photovoltaic cell. The photovoltaic cell comprises: a substrate having a textured surface, the textured surface comprising a plurality of first pyramids and a plurality of second pyramids, the plurality of second pyramids being arranged between the plurality of first pyramids; the tower footing size of the second pyramid is larger than that of the first pyramid, and the tower height of the second pyramid is larger than that of the first pyramid. According to the invention, the scattering capability of broadband light can be enhanced, the problem that the traditional single-scale pyramid texture surface is insufficient in scattering of long-wave light is effectively improved, and the light capturing and absorbing effects of the photovoltaic cell are improved; the dual-scale pyramid suede can be better matched with the passivation contact layer, so that the surface recombination phenomenon is reduced, and the high open-circuit voltage of the photovoltaic cell can be maintained; the second pyramid can also provide an adaptive contact basis for the metal electrode, and the contact resistance between the electrode and the substrate is reduced. Therefore, the photoelectric conversion efficiency of the photovoltaic cell can be effectively improved.

According to the crystalline silicon perovskite laminated cell and the preparation method thereof disclosed by the invention, a metal seed thin layer with a grid line pattern is introduced between a transparent conductive film and a grid line electrode of the laminated cell, so that on one hand, the contact resistance between the grid line electrode and the transparent conductive film can be greatly reduced; the contact resistance is reduced to 5% of the original contact resistance compared with that of a cell without a metal seed thin layer; and on the other hand, the binding force between the grid line and the transparent conductive film is improved, so that the ultralow-temperature curing slurry and the transparent conductive film can be fully bonded. In conclusion, the metal seed thin layer with the grid line pattern is introduced to achieve the purpose of improving the conversion efficiency and the stability of the crystalline silicon / perovskite laminated cell at the same time.