15355 results about "Short circuit" patented technology

The invention provides a mining circuit fault self-diagnosis method and system. According to the method, current and voltage waveforms and three-dimensional vibration signals of a cable are collected, and anti-interference data are generated through self-adaptive noise reduction and time sequence synchronization; a waveform interception window is dynamically adjusted based on the correlation between the mechanical vibration intensity and the current transient rate, the wave crest slope variable quantity is extracted from the current transient segment, high-frequency harmonic energy is separated from the voltage transient segment, time-frequency analysis is carried out on the vibration signal to extract an energy sudden increase frequency point, and a mechanical damage spectrum feature set is constructed; inputting the features into a space-time correlation model, and verifying space-time consistency of current distortion and voltage abnormity to generate composite features; dynamically correcting a fault threshold based on the environmental interference factor; and finally, a short-circuit peak or open-circuit oscillation diagnosis result is output according to the association strength of the electrical and mechanical characteristics. According to the invention, accurate fault self-diagnosis of the mining cable under a complex working condition is realized.

The invention discloses a distributed power supply access-oriented power distribution network fault distance measurement method and system, and relates to the technical field of power systems, and the method comprises the steps: collecting the electrical parameters and operation states of distributed power supply access nodes in a power distribution network in real time, building a dynamic manifold model based on an ecological niche theory, and carrying out the calculation of the dynamic manifold model; adaptively adjusting manifold learning neighborhood parameters according to power fluctuation data included in the electrical parameters, and updating node ecological niches to reconstruct a dynamic manifold model; based on the reconstructed dynamic manifold model, fault features are extracted from three scales of a current harmonic component, a feed line inter-harmonic propagation path and whole network voltage influence, and a three-dimensional feature vector is generated through fusion of a graph correlation algorithm; based on the expanded fault sample library and the power fluctuation data, constructing a fault transfer relation model to predict a ground fault and a short circuit risk area; a fault source is modeled by adopting a topological neural network, and a fault point distance measurement value is output through state prediction and strategy deduction.

The invention relates to the technical field of industrial safety, and discloses an electrolytic aluminum short circuit port operation safety early warning system based on multi-parameter collaborative awareness and intelligent diagnosis, and the system comprises a parameter collaborative awareness module, a dynamic diagnosis module, an early warning decision module, and an execution feedback module. By constructing a multi-dimensional parameter collaborative sensing mechanism, fusing temperature field distribution, current balance degree and insulation state multi-source data in real time and dynamically capturing early abnormal symptoms of a short circuit port, the hysteresis problem of traditional single-parameter threshold monitoring is solved, conversion from passive response to active defense is achieved, and the comprehensiveness and timeliness of operation state monitoring are improved; and meanwhile, based on a historical fault database and a real-time evolution model, a health index is generated and a fault path is predicted, so that maintenance personnel can pre-judge a development trend and a time window of potential risks in advance, and sudden equipment accidents are avoided.

The invention provides a test method and device for a motor active short-circuit relay, and a storage medium. The method includes the steps: performing the zero speed detection of a motor after a motor controller completes a low-voltage power-on operation, wherein when the motor controller is powered down, a first relay and a second relay are both switched on; controlling the second relay to be turned on if the motor passes the zero speed detection, and injecting a first excitation signal at the control ends of a first phase winding and a third phase winding through the motor controller; performing injection detection of the first excitation signal to determine whether the first excitation signal is successfully injected or not; controlling the first relay to be turned on if the first excitation signal is successfully injected, and obtaining a voltage across two ends of the first relay; and judging whether the power-on test of the first relay is successful or not according to the voltage across two ends of the first relay. The method can realize the turn-on test of the short-circuit relay, and ensures the reliability of the active short-circuit function of the vehicle motor duringdriving.

The invention discloses a vehicle stopping electrical safety monitoring system, and relates to the technical field of new energy vehicle control, the vehicle stopping electrical safety monitoring system comprises an intelligent sensing layer, a digital twin decision-making layer, a hierarchical execution layer and a safety escape layer, and the intelligent sensing layer comprises a multi-mode sensor array and is used for collecting physical parameters, chemical parameters and environmental parameters of a vehicle electrical system in real time. According to the method, a high-precision three-dimensional model, an embedded electrolyte leakage model and a wire harness aging model are constructed, the high-precision three-dimensional model comprises a battery compartment geometric structure and a wire harness layout, the former simulates a diffusion path and predicts a short-circuit risk based on fluid dynamics, and the latter realizes fault evolution prediction based on a physical mechanism by combining vibration fatigue and insulation material aging analysis. The hysteresis of traditional threshold value alarm is broken through, a dynamic threshold value table is generated in combination with environment temperature, the charge state and historical fault data, the problem that a traditional fixed threshold value cannot adapt to complex working conditions is solved, and the false alarm rate and the missing alarm rate are reduced.

The invention discloses a photovoltaic cell string, a photovoltaic module and a photovoltaic module preparation method, and relates to the technical field of photovoltaic power generation. According to one specific embodiment, the photovoltaic cell string comprises a cell piece, a welding strip and a first insulating strip, the battery pieces are connected in series through the welding strip to form a battery string; the first insulating strip is adhered to the back surface of the first end of the battery string; and the front welding strip of the first end of the battery string extends out of the edge of the first end of the battery string, is folded to the back surface of the first end of the battery string and is adhered to the first insulating strip. According to the embodiment, the battery piece cracking risk and the assembly short circuit risk can be reduced, the assembly yield is improved, and the new equipment development cost is reduced.

The invention discloses a series lithium battery pack power supply equalization management method. The method comprises the following steps: acquiring an original data set of a series lithium battery pack; calculating a voltage change rate, a temperature sudden rise rate and an internal resistance fluctuation amplitude, and obtaining a dynamic feature set of battery operation; when the dynamic feature set exceeds a corresponding preset threshold value, obtaining a short-circuit risk assessment result; matching a pre-established battery pack topological structure diagram with the short-circuit risk assessment result, determining a target battery identifier needing to be isolated, generating an isolation instruction by adopting a relay control algorithm, and completing the isolation of the short-circuit battery; adjusting the charging current distribution of the updated battery pack through an equalization management algorithm to obtain equalized battery operation parameters; and if the voltage, temperature and internal resistance data of the residual single batteries are all in a normal range, determining that the system stability is recovered, and obtaining a final running state of the battery pack. The short-circuit risk of the lithium battery pack can be effectively prevented, and intelligent management and safety improvement of the battery pack are realized.

The invention relates to the technical field of batteries, and discloses a single battery and a battery pack, the single battery comprises a shell, a first cover plate, a battery cell and a first pole, along a first direction, one end of the shell is provided with a first opening, the battery cell is arranged in the shell, a first tab of the battery cell extends out from one end part of a battery cell body of the battery cell, and a second tab of the battery cell extends out from the other end part of the battery cell body; the first electrode lug is bent towards the first cover plate and forms a first bending point and a second bending point, the first electrode column and the first electrode lug are welded to form a first welding printing area, the first welding printing area is located between the second bending point and the end part of the first electrode lug, the length of the first electrode lug between the first bending point and the second bending point is L, in a second direction perpendicular to the first direction, a first spacing distance between the edge of the first welding printing area and the edge of the first cover plate is d, in the first direction, a second spacing distance between the inner side of the first cover plate and the root of the first tab is c, and L is larger than or equal to 0.6 mm and smaller than or equal to 20 mm. And the risks of tab tearing and battery monomer short circuit are reduced.

The present disclosure provides a method and device for calculating fault measurement impedance of a hybrid-connected grid-following and grid-forming wind power system. The method includes: obtaining characteristics of the grid-following and grid-forming converters and a corresponding low voltage ride-through control strategy; establishing an equivalent circuit under a corresponding fault state; conducting a simplified analysis on the wind power system to obtain an equivalent network diagram; obtaining a sub-circuit diagram of each power source excitation acting alone; obtaining short-circuit currents on both sides of the corresponding system and a grid connection point voltage; superimposing to obtain total short-circuit current on both sides of the wind power system and total grid connection point voltage; and obtaining a measurement impedance at a protection installation location on the new energy source side. The method can accurately calculate the measurement impedance value at the protection installation location after the wind power system has fault.

The invention discloses a CPLD-driven IGBT short-circuit current dynamic monitoring method and system, and relates to the technical field of power electronics, and the method comprises the specific steps of S100 real-time data acquisition, S200 dynamic threshold calculation, S300 short-circuit state judgment, S400 rapid protection execution, and S500 fault data recording and uploading. Accurate and prospective judgment of the short circuit state of the IGBT is achieved, two stress parameters including the direct-current bus voltage and the junction temperature serve as independent variables, when the bus voltage rises, the voltage stress borne by the IGBT in the turn-off period is increased, meanwhile, the current peak at the short circuit moment is more remarkable, early warning is conducted in advance by dynamically lowering the threshold value, and therefore the short circuit state of the IGBT is accurately judged. According to the mechanism, the monitoring system does not simply respond to the occurred overcurrent, but can pre-judge the safety boundary of the device under the current working condition, so that intervention is implemented before the current really reaches a dangerous peak value, and a protection blind area under a severe working condition is effectively avoided.

The invention relates to the field of photovoltaic technology, in particular to a solar cell, a photovoltaic module and a preparation method of the solar cell, the solar cell comprises a substrate, the substrate comprises a first surface and a second surface, the first surface comprises a first area and a second area, and the second surface comprises a third area and a fourth area, the first diffusion layer is located on the first area or located in the substrate corresponding to the first area, the first diffusion layer is opposite to the substrate in conductive type, the second diffusion layer is located in the substrate corresponding to the third area, the second diffusion layer is opposite to the first diffusion layer in conductive type, and the first passivation layer is located on the third area and the fourth area. The first passivation layer covers the second diffusion layer and is in contact with the substrate, the first electrode electrically connected with the first diffusion layer is arranged on the first area, the second electrode electrically connected with the second diffusion layer is arranged on the third area, and the open-circuit voltage and the short-circuit current of the solar cell are improved through the design, and the photoelectric conversion efficiency is improved.

The invention relates to the technical field of BMS and the like, and provides a battery management system based on adaptive digital twinning, a physical layer of the battery management system comprises a battery pack, a sensor network and an edge computing node, and is responsible for data acquisition and preprocessing; the digital twin layer comprises a self-adaptive multi-scale model and a real-time data engine, battery behaviors are dynamically simulated by coupling electrochemical, thermal and aging models, a future state trajectory prediction result is output, and the real-time data engine fuses sensor data, historical data and simulation data to drive model updating; the intelligent decision-making layer comprises a reinforcement learning controller and a fault prediction module which are deployed in a local server, the reinforcement learning controller dynamically optimizes a charging and discharging strategy according to a prediction result of the digital twinborn layer and issues and executes the charging and discharging strategy, and the fault prediction module analyzes multi-source time sequence data based on an LSTM network so as to early warn thermal runaway and short circuit risks in advance. According to the invention, long-term accurate mapping and adaptive adjustment between the battery physical entity and the digital model can be realized.

The invention discloses a power supply system of a server, a control method of the power supply system and the server, and relates to the technical field of servers, and the method comprises the steps that a detection control unit is integrated in a power converter, and the detection control unit collects current data of the output end of the power converter and amplifies the current data; whether the output end of the power converter is short-circuited or not is judged according to the amplified current data, so that weak abnormal current signals at the early stage of short circuit are easier to capture, the amplified current data can reach an overcurrent protection point more quickly, and the power converter is turned off before the actual short-circuit current at the output end of the power converter reaches a higher value. Instantaneous current generated by the input end of the power converter is reduced, the risk of triggering power failure of the preceding-stage first electronic fuse is reduced, the technical problem that normal operation of other functions of the server can be affected when the output end of the power brick is short-circuited is solved, and the technical effect that other functions of the server can normally operate when the output end of the power brick is short-circuited is achieved.

The invention relates to the technical field of performance testing, in particular to an electrochemical performance testing system and method for an energy storage device, and the system comprises a time synchronization triggering module, an impedance track acquisition module, a degradation state recognition module, an electrochemical abnormity monitoring module and a performance testing judgment module. According to the invention, multi-channel concurrent synchronous acquisition of voltage, current, impedance and temperature is realized by calculating sampling delay compensation time, and lithium precipitation, micro short circuit and electrode interface damage trend can be accurately identified by calculating a gradient absolute difference sequence of a voltage change rate and a current change rate and linking an impedance abrupt change rate and short-period abnormal fluctuation. In the process of judging the state of the energy storage device, open-circuit voltage distribution, charging and discharging current stability and impedance change trend are considered in a combined manner, the recognition accuracy of an active state, a degradation state and an abnormal state is improved, and the precision and reliability of electrochemical performance testing are improved.

The invention relates to the technical field of virtual power plant scheduling, and provides a virtual power plant multi-target optimization scheduling method and system fusing deep reinforcement learning, and the method comprises the steps: calculating the voltage sensitivity parameter of each power grid node in an access region of a virtual power plant through obtaining the short-circuit capacity data and real-time impedance spectroscopy measurement data of a grid-connected point of the virtual power plant; positioning a weak line section associated with the power grid node; according to the voltage sensitivity parameter and the information of the weak line section, a reactive power resource dynamic allocation strategy is generated, multi-target optimization scheduling of the virtual power plant is achieved, and the deep reinforcement learning agent aims at maximizing the voltage regulation compensation income and minimizing the equipment regulation loss; according to the method, rapid collaborative optimization scheduling of the virtual power plant in a complex power grid environment is realized, the problem of multi-target coordination caused by model mismatch, response lag and distributed resource dispersity in a traditional method is solved, and real-time response and adaptive adjustment are realized.

The invention discloses a power coupling-considered capacity ratio estimation method for a network-constructing / network-following multi-machine hybrid system, and the method comprises the steps: building a GFL-GFM hybrid system model, combining VSG power coupling small signal modeling and a dynamic relative gain matrix (DRGA), and quantifying the coupling strength of active / reactive power to output voltage; the frequency domain impedance characteristic of the GFM converter is simplified, and an ideal voltage source series equivalent reactance equivalent model is constructed; deriving an analytical relationship between a generalized short-circuit ratio (gSCR) and a capacity ratio based on the model, and generating a ratio formula in combination with engineering boundary sub-scenes to form a ratio range suitable for multiple scenes; for coupling time-varying characteristics, a closed-loop mechanism of'mixed mode-coupling sensing-correction calculation-execution feedback 'is constructed, and the ratio is dynamically adjusted. According to the method, coupling quantization and multi-machine coordination control are deeply fused, the problem that the external characteristic model precision and the multi-working-condition adaptability are difficult to consider under complex environment coupling is effectively solved, and the engineering applicability of the hybrid fan system is enhanced.

The invention relates to a lithium ion battery thermal runaway early warning method and device and a medium, and the method comprises the steps: setting an AC excitation power supply parameter, and outputting a sine excitation current with a preset frequency and amplitude; injecting the polymer into a single battery through a four-probe method; synchronously acquiring an injection current signal and a response voltage signal; through fast Fourier transform analysis, the amplitude and the phase of a signal fundamental frequency component are extracted; and calculating the electrochemical impedance under the frequency. And in combination with an electrochemical impedance-thermal runaway precursor mapping database established by a pre-experiment, converting the impedance value into a corresponding thermal runaway risk level, and outputting corresponding early warning information. According to the method, lithium dendrite growth and internal micro short circuit signs can be captured in advance, and the early warning time efficiency is remarkably improved compared with traditional voltage / temperature monitoring.

The utility model discloses a pressure-resistant cross-linked polyethylene power cable which comprises an outer sheath, an armor layer, an oxygen isolation inner protection layer and a flame-retardant wrapping tape layer which are sequentially arranged from outside to inside, and a pressure-resistant cable core, a plurality of power cable cores and a plurality of interval units are arranged in the flame-retardant wrapping tape layer. According to the power cable, the oxygen isolation inner protection layer effectively prevents oxygen permeation and delays aging of the cable, and the flame-retardant belting layer improves the fireproof performance of the cable. The multiple surrounding plate bodies surround the pressure-resistant cable core, and the spacing plate bodies play a role in separating and fixing the power cable core, so that the pressure-resistant capability of the cable is improved, and the overall structure of the cable is more compact and stable. In addition, the insulating layer is made of the cross-linked polyethylene material, so that the cable has good insulating performance, short circuit can be effectively prevented, the safety and reliability of the cable are improved, and power transmission is stable and efficient.

The invention provides a tumor electric field treatment system, an electrode slice temperature detection method and an electrode slice anomaly detection method, the system comprises an electrode slice and an adapter provided with a first controller, the electrode slice comprises a plurality of electrode units and a plurality of temperature detection units, the plurality of temperature detection units are divided into a plurality of row groups and a plurality of column groups, and the first controller is connected with the adapter. The grounding ends of the temperature detection units in each row group are jointly connected to the same grounding wire, and the signal ends of the temperature detection units in each column group are connected to the same dual-purpose signal wire after being in short circuit with the corresponding electrode units; when the dual-purpose signal line is connected to the temperature sampling point, the grounding wires are sequentially conducted, so that temperature detection signals detected by the temperature detection units are sampled based on the temperature sampling point; when the dual-purpose signal line is connected to the alternating power line, alternating electric signals are transmitted to the electrode units. Therefore, the temperature of the electrode plate can be detected by using fewer conductive traces, and whether the electrode plate is abnormal or not can be judged through temperature detection.

The embodiment of the invention provides a closed-loop control method for power driving and protection, and the method comprises the steps: constructing a voltage feedback type circuit through a high-speed operational amplifier, and forming a closed-loop gain structure through a feedback network of the voltage feedback type circuit; the load current of the output end of the voltage feedback type circuit is monitored in real time, and when the load current exceeds a first set threshold value, a protection mechanism is triggered to turn off the output stage; the power-on surge current is limited through the soft start control circuit; phase information of a load reflection coefficient is obtained, an inductance / capacitance combination of the variable dynamic impedance matching network is selected according to phase information table look-up, inductance / capacitance parameters are switched through a relay, and the transmission standing-wave ratio between the power amplifier and a load is optimized; monitoring the temperature of the radiating fin of the power tube, and dynamically adjusting the resistance value of the feedback network; and performing cooperative control of short-circuit protection, over-temperature protection and surge suppression according to the priority. According to the embodiment of the invention, the performance bottleneck in a load fluctuation scene is broken through.

The invention relates to the technical field of chip heat dissipation, and provides an immersed heat dissipation system with liquid nitrogen as a cooling medium and an integrated circuit assembly. In an immersed heat dissipation system with liquid nitrogen as a cooling medium, huge heat generated by a high-power-density chip under an extreme working condition can be efficiently absorbed and taken away under the extremely low working temperature and the large phase change heat absorption capacity, the heat transfer limit of a traditional cooling technology is broken through, and deep cooling of the chip is achieved; meanwhile, the liquid nitrogen is non-conductive and stable in chemical property, the electrical short circuit risk and physical and chemical corrosion problems caused by leakage of the cooling working medium are thoroughly eliminated, and the long-term operation reliability and safety of the immersed heat dissipation system with the liquid nitrogen as the cooling medium are remarkably improved. Therefore, stable operation of the chip under high load is guaranteed, physical damage and performance frequency reduction caused by overheating are avoided, and even favorable conditions are created for safe and efficient operation of the chip under higher working frequency.

The invention discloses a stability evaluation and optimization method for a multi-infeed series-parallel new energy station based on equivalent external characteristics of a network construction type converter, and belongs to the technical field of electric power automation. Comprising the following steps: constructing a new energy multi-infeed hybrid system stability analysis closed-loop dynamic model, and simplifying a network construction type admittance transfer function; based on a stability analysis closed-loop dynamic model of the new energy multi-infeed series-parallel system, simplifying the new energy multi-infeed series-parallel system into an equivalent single-infeed system, and evaluating the stability of the equivalent single-infeed system through a generalized operation short-circuit ratio and a critical generalized operation short-circuit ratio; analyzing and quantifying the influence of key parameters of the network construction type equipment on the stability of the system through a parameter sensitivity analysis method; a node participation factor is used as an evaluation index, and control parameters are optimized based on a stability optimization method of key parameters of network construction type equipment of system weak nodes. The method provided by the invention has good effectiveness and reliability, and can realize gradual improvement and refined regulation and control of the system stability.

Provided in the present application are an electrode assembly, a battery cell, a battery and an electrical device. The electrode assembly comprises a first electrode sheet and a second electrode sheet which have opposite polarities. The first electrode sheet comprises a first electrode sheet body, wherein the first electrode sheet body comprises a first current collecting body and first active material layers, the first current collecting body comprising two first surfaces opposite each other in the direction of thickness of the first current collecting body, and a first end face connecting the two first surfaces, and the first active material layers being arranged on the first surfaces. The electrode assembly further comprises an insulating member connected to the first electrode sheet body, wherein at least part of the insulating member is arranged on the outer side of the first end face in a first direction, the first direction being perpendicular to the direction of thickness. The insulating member can separate burrs on the first end face from the second electrode sheet, thereby reducing the risk of conduction between the burrs and the second electrode sheet and reducing the possibility of thermal runaway caused by a short circuit, improving the reliability of the battery cell.

The invention relates to the technical field of batteries, in particular to a battery. Comprising a positive plate and electrolyte, the positive plate comprises a positive current collector and a coating positioned on the surface edge of at least one side of the positive current collector along the length direction; the coating comprises filling particles, and the filling particles comprise at least one of inorganic particles and nitrogen-containing particles; the electrolyte comprises non-fluorinated cyclic carbonate and fluorinated ethyl acetate; the non-fluorinated cyclic carbonate comprises propylene carbonate and optional ethylene carbonate; on the basis of the total mass of the electrolyte, the content ratio C1 of the non-fluorinated cyclic carbonate is smaller than or equal to 25%, the content ratio C11 of the propylene carbonate is 3.1%-24.9%, the content ratio C12 of the ethylene carbonate is 0%-5%, and the content ratio C2 of the fluorinated ethyl acetate is 20.2%-70%. The battery provided by the invention can improve the problem of lithium precipitation under low-temperature discharge, and has relatively good short-circuit safety performance and relatively low high-temperature gas production rate.

The present disclosure provides a fault measurement impedance calculation method and device for a hybrid grid-following / grid-forming wind power system. The method comprises: acquiring characteristics of a grid-following converter and a grid-forming converter, and corresponding low-voltage ride-through control strategies; establishing an equivalent circuit corresponding to a fault state; performing simplified analysis on a hybrid wind power system to obtain an equivalent network diagram; obtaining a branch circuit diagram under individual action of each power excitation; obtaining short-circuit currents and grid-connected point voltages on two sides of the system corresponding to the individual action of each power excitation; performing superimposition to obtain a total short-circuit current and a total grid-connected point voltage at the two sides of the hybrid wind power system; and obtaining a measurement impedance at a protection installation point on a new energy side. In the method, a measurement impedance value at a protection installation point of a hybrid wind power system after a fault occurs can be accurately calculated, so that the setting calculation of distance protection is ensured, so as to accurately reflect fault characteristic information of a hybrid AC system, thereby providing a basis for the distance protection applicability research of the hybrid wind power system, and thus ensuring the safe and stable operation of new energy systems.

The invention belongs to the technical field of power equipment monitoring, and relates to an in-operation transformer anti-short-circuit capability dynamic analysis method considering a health state, and the method comprises the steps: obtaining the health state perception data of a transformer at a historical moment; calculating an anti-short-circuit capability equivalent loss coefficient according to the dynamic equivalent short-circuit current; performing iterative training on a preset neural network by taking the health state sensing data as input and the anti-short-circuit capability equivalent loss coefficient as output to obtain an anti-short-circuit capability dynamic analysis model; and inputting real-time health state sensing data into the anti-short-circuit capability dynamic analysis model, and outputting through the anti-short-circuit capability dynamic analysis model to obtain a real-time anti-short-circuit capability equivalent loss coefficient, namely, obtaining a transformer anti-short-circuit capability evaluation result. According to the method, the health state and the anti-short-circuit capability equivalent loss coefficient are mapped through the dynamic equivalent short-circuit current and the neural network, and the defect that the real-time influence of insulation aging cannot be quantified through a traditional method is overcome.

The embodiment of the utility model belongs to the technology of storage equipment, and provides a storage box which comprises a box body, an airflow circulation assembly and an adjusting assembly, the airflow circulation assembly is provided with a first channel, a second channel and an air mixing channel, and the air mixing channel communicates with an output port of the first channel and an output port of the second channel; the air flow circulation assembly comprises a decorative plate, and the decorative plate is provided with an air outlet communicating with the upper portion of the storage cavity and an output port of the air mixing channel, a first air return port communicating with the lower portion of the storage cavity and an input port of the first channel, and a second air return port communicating with the lower portion of the storage cavity and an input port of the second channel; the first return air inlet and the second return air inlet are respectively communicated with different positions of the lower part of the storage cavity. According to the storage box provided by the embodiment of the invention, in airflow circulation between the storage cavity and the airflow circulation assembly, airflow entering and outputting do not conflict, airflow short circuit is avoided, the airflow flowing speed is increased, the airflow temperature and humidity changing speed is increased, and the rapid adjustment requirement of a customer is met.

The invention discloses a battery pack short circuit early warning and protection method based on multi-sensor fusion, and the method comprises the steps: S1, collecting the multi-dimensional sensor data, including temperature distribution data, voltage fluctuation data, gas component data, deformation data and current ripple data, of a battery pack in real time; s2, performing space-time alignment and feature extraction on the multi-source sensor data, and constructing a fusion feature vector; s3, based on the fusion feature vector, performing short circuit type identification and risk level evaluation through a two-stage short circuit risk judgment model; and S4, triggering a grading response mechanism according to the risk grade, wherein the grading response mechanism comprises an early warning signal, current limiting, fuse action or battery cluster isolation. By fusing five-dimensional data of temperature, voltage, gas, deformation and current, a two-stage short circuit risk judgment model is constructed, and accurate classification and risk grading evaluation of short circuit types are realized. A four-level response mechanism is triggered based on an evaluation result, and protection is strengthened step by step from early warning to physical isolation.

The invention belongs to the technical field of integrated circuits, and particularly relates to a speed-adjustable fan driving and anomaly detection circuit with high reliability and low cost. Comprising a current expansion driving module for providing a voltage FCC stabilized by an LDO for a fan and performing current expansion on an output current of the LDO to drive the fan; the logic control module is connected with the current expansion driving module and is used for adjusting a control signal ADJlt; n: 0gt; the value of the voltage FCC output by the LDO is changed; the open circuit and locked-rotor detection module is connected with the logic control module and the VIN port of the LDO; and the short circuit detection module is connected with the logic control module and the output end of the LDO, outputs a signal to a state flag bit FTO, and judges whether the fan is in a normal working state, an open circuit state, a locked-rotor state or a short circuit state or not according to the waveform and the level of the state flag bit FTO. The speed-adjustable fan driving circuit is integrated, and the function of detecting various abnormal states of the fan is achieved.

The invention provides a display device and a driving chip of a display panel. The display device comprises the display panel and the driving chip. The driving chip comprises a first comparator and a second comparator; the driving chip is used for dividing the output channels corresponding to the at least two data lines into a first channel with positive polarity and a second channel with negative polarity; a first comparator for comparing the first voltage with a first reference voltage to output a first level; the second comparator is used for comparing the second voltage with a second reference voltage and outputting a second level; and the driving chip is also used for continuously monitoring the first level and the second level so as to detect whether a short circuit between the data lines occurs in the display panel or not. The data line is divided into the positive and negative polarity channels through the driving chip, the comparator is used for comparing the channel voltage with the reference voltage, the level change is monitored to detect the short circuit, an amplifier and a complex switch assembly do not need to be additionally arranged, the circuit structure is simplified, and the manufacturing cost is reduced.