287 results about "Diaphragm structure" patented technology

The invention relates to the technical field of battery detection, in particular to a battery multi-physical-quantity performance test and intelligent diagnosis method, system and device and a storage medium, and the method comprises the steps: building a virtual battery model containing an electrode, electrolyte and diaphragm structure, and marking initial mechanical strength parameters; synchronously acquiring real-time current and surface infrared thermal imaging temperature data of a real battery; inputting the current data into the virtual model to execute electrochemical and thermal coupling simulation, and comparing differences to locate a physical abnormal area; disassembling an abnormal area, measuring structural characteristic parameters of the material, recording space coordinates, and extracting electrochemical state variables at corresponding positions of the virtual model through space calibration; and establishing a mapping relationship between the material structure parameters and the electrochemical variables, outputting a dominant failure mechanism, and updating the failure criterion of the virtual model. Abnormality is accurately positioned by combining infrared thermal imaging and simulation difference analysis, multiple physical quantities are fused to reveal correlation between structural degradation and performance attenuation, and data are dynamically updated to improve diagnosis reliability.

The invention discloses a lithium ion battery electrolyte, a preparation method and application. The lithium ion battery electrolyte comprises a lithium salt and an organic solvent, wherein the lithium salt comprises a combination of at least two of lithium hexafluorophosphate, lithium difluoro bis (oxalato) phosphate, lithium bis (fluorosulfonyl) imide and lithium bis (oxalato) borate, and the organic solvent comprises 30 wt%-50 wt% of hydrofluoroether, 10 wt%-30 wt% of acetate and 20 wt%-60 wt% of carbonate. The lithium ion battery electrolyte provided by the invention can keep the diaphragm structure complete, realizes filling of pores with lithium salt, and reduces the permeability of the diaphragm, thereby controlling possible shrinkage of the diaphragm in a temperature change process under a low-temperature or high-temperature condition; the crosstalk problem caused by gas penetration between the positive electrode and the negative electrode is inhibited, and the battery prepared by utilizing the lithium ion battery electrolyte provided by the invention has good cycle performance and rate capability under a low-temperature condition and has relatively high safety under a high-temperature condition.

The invention belongs to the technical field of microphones, and particularly relates to a microphone core and a microphone, the microphone core comprises a shell and at least one pickup assembly arranged in the shell; wherein the shell is provided with at least one pair of sound holes for sound waves to enter, each pair of sound holes are symmetrically arranged on opposite shell walls of the shell, and the sound pickup assembly can pick up sound wave signals entering the sound holes. According to the invention, at least one pair of sound holes for sound waves to enter is arranged on the shell, and each pair of sound holes are symmetrically arranged on the opposite shell walls of the shell, so that the sound pickup assembly can pick up sound wave signals entering from each sound hole, multi-directional sound pickup is realized under a single diaphragm structure, and the practicability is improved.

The invention provides a frequency mixing MEMS piezoelectric loudspeaker and a manufacturing method thereof, the frequency mixing MEMS piezoelectric loudspeaker comprises a plurality of MEMS piezoelectric sound production units, the structure of a vibrating diaphragm of each unit is a cantilever beam structure, a bridge type structure or a periphery reinforcing structure, if the sizes of cavities of all the MEMS piezoelectric sound production units are the same, the structures of the vibrating diaphragms of at least two MEMS piezoelectric sound production units are different, and if the sizes of the cavities of all the MEMS piezoelectric sound production units are the same, the structures of the vibrating diaphragms of all the MEMS piezoelectric sound production units are different. If the size of the cavity of at least one MEMS piezoelectric sound production unit is different from the size of the cavity of the other MEMS piezoelectric sound production unit, the structures of the vibrating diaphragms of the plurality of MEMS piezoelectric sound production units are the same or different, and the sizes of the cavities and the structures of the vibrating diaphragms are related to the resonant frequency of the MEMS piezoelectric sound production units. According to the loudspeaker, the plurality of MEMS piezoelectric sounding units have different diaphragm structures and / or have different cavity sizes, so that the output sound pressure level SPL of the loudspeaker can be improved, and the audio frequency response range is widened.

The invention discloses a single-action pressure reduction diaphragm type pressure flow amplifier in the field of industrial flow control. The single-action pressure reduction diaphragm type pressure flow amplifier comprises a machine body, a valve core, a flexible diaphragm, an exhaust assembly, a large pressure reduction device and a small pressure reduction device. An adjusting cavity, an air inlet cavity, an air outlet cavity, an air inlet channel and an air outlet channel are formed in the machine body, the air inlet channel is communicated with the air inlet cavity, the air outlet cavity is communicated with the air outlet channel, the valve core is arranged between the air inlet cavity and the air outlet cavity, the valve core is pushed through the flexible diaphragm and the exhaust assembly, and the compressed air flow and pressure intensity between the air inlet cavity and the air outlet cavity can be adjusted; when the pressure intensity of the adjusted air is relatively low, the small pressure reducing device is used for reducing pressure; and when the pressure intensity is high, the large pressure reducing device is used for reducing pressure. The diaphragm structure design is adopted, the flow and the pressure intensity of compressed air are adjusted through reciprocating motion of the flexible diaphragm, the pressure intensity of the adjusted air is reduced through the two pressure reducing devices, and the diaphragm structure can be better suitable for application scenes where the pressure intensity of the adjusted air is high.

The present application discloses a battery separator and a preparation method, a battery, and an electrical device. The battery separator includes a base film, a first adhesive layer located on one side of the base film, and a heat-resistant layer and a second adhesive layer located on the other side of the base film; the first adhesive layer has a first thickness H1μm, the base film has a first coverage C1%, the heat-resistant layer has a second thickness H2μm, the second adhesive layer has a third thickness H3μm, and the heat-resistant layer has a second coverage C2%, satisfying: H2>H1+H3, C2=(0.6~1.2)*(H1+H3) / H2%, and C1=(0.1~0.3)*H2 / H1%. The present application sets an asymmetric separator structure so that the battery separator has excellent heat resistance and improves the overall safety of the battery. In addition, in the process of compounding the separator and the pole piece, the bonding requirements are met after passing through the hot compound roller, which can effectively avoid the powder loss phenomenon caused by the battery separator and the pole piece after passing through the roller.

The invention discloses an MEMS microphone and an electronic device. The MEMS microphone comprises a substrate structure, a diaphragm structure, a support structure and a back electrode structure. The vibrating diaphragm structure is stacked on one side of the substrate structure, the vibrating diaphragm structure comprises a first functional area located in the center and a plurality of second functional areas connected to the peripheral side of the first functional area and arranged in pairs, and each pair of second functional areas are located on the two opposite sides of the first functional area respectively; the supporting structure is stacked on one side of the substrate structure and surrounds the outer side of the vibrating diaphragm structure, and the supporting structure comprises a supporting part and a plurality of functional parts corresponding to the plurality of second functional areas; the back electrode structure is stacked on the side, away from the substrate structure, of the supporting structure and can form a parallel plate capacitor with the first functional area, and when the voltage between the vibrating diaphragm structure and the back electrode structure is larger than a set value, the first functional area can be attracted to the back electrode structure, so that the second functional area can form an interdigital capacitor with the corresponding functional part.

The invention relates to the technical field of hydrogen energy storage and transportation, and discloses a hydrogen storage system convenient for hydrogen charging and discharging regulation, comprising: a gas input module comprising a gas discharging column unit, a buffer tank and a connecting unit, the gas discharging column unit being connected with a tube bundle vehicle by using a ferrule type quick joint, a compression module comprising a first hydrogen compressor unit and a second hydrogen compressor unit, the second hydrogen compressor unit adopts a water-cooling diaphragm structure, the hydrogen storage module comprises a first hydrogen storage bottle group unit and a second hydrogen storage bottle group unit, and the second hydrogen storage bottle group unit is divided into three-stage storage, a gas distribution and control module, a safety guarantee module, a monitoring module and an auxiliary module. Through a gas discharging column double-path parallel interface of the gas input module and the temperature compensation type pressure gauge, and in combination with a check valve and a rupture disk of the buffer tank, the damage of high-pressure impact to equipment is avoided, so that the equipment is prevented from being damaged by the high-pressure impact, and the service life of the equipment is further prolonged.

The invention discloses a diaphragm and a battery pack comprising the diaphragm. The diaphragm structure comprises a first piece, a second piece and a third piece which are sequentially connected along a first direction and are provided with corresponding side wings on two sides before being folded, at least two positioning holes are arranged on four corresponding side wings of the first piece and the third piece, the at least two positioning holes are respectively arranged on two opposite sides of the second direction of the pole group after being folded, and structures such as crease lines are further arranged. According to the structure, the membrane can be matched with the positioning needle of the coating workbench, the pole group is accurately coated, and deviation and poor insulation are avoided. Parameters such as the diameter, the distance and the width of an overlapping area of the positioning holes are reasonably designed, and the structural strength, the insulating property and the film coating quality of the film are guaranteed. According to the battery pack adopting the diaphragm, the safety, the consistency and the production efficiency are remarkably improved, the cell assembly size deviation is reduced, the internal short circuit risk is reduced, the cycle life is prolonged, the diaphragm is suitable for various scenes, and the market competitiveness is enhanced.

The invention discloses a diaphragm and a preparation method thereof, a battery and an electric device. The diaphragm comprises a base membrane and a coating arranged on at least one surface of the base membrane, the coating contains polymer particles, and the melting point of the polymer particles is 90-120 DEG C. The diaphragm provided by the embodiment of the invention contains the coating, and can be melted at the melting point temperature of polymer particles and seal pores contained in the base membrane, so that the thermal runaway risk of the battery is reduced, and the safety performance of the battery is improved. The preparation method can ensure stable performance of the diaphragm structure and the like. The battery comprises the diaphragm.

The utility model provides an MEMS piezoelectric sounder and a loudspeaker, first piezoelectric composite layers are symmetrically arranged at specified edge positions, a plurality of slotted structures are arranged in a specified area, a first diaphragm edge of a formed diaphragm structure is an anchoring edge, and an edge slotted structure is arranged at a non-anchoring edge. The internal stress of each diaphragm layer in the diaphragm structure caused by the process can be reduced by arranging the slotting structure, the flexibility of the diaphragm structure can be improved by covering the slotting structure with the flexible material, meanwhile, the sound leakage of the MEMS piezoelectric sounder at low frequency is reduced, the vibration amplitude and the emission sound pressure level of the MEMS piezoelectric sounder are improved, and the sound quality of the MEMS piezoelectric sounder is improved. According to the MEMS piezoelectric sounder, the flexible material with low density is adopted to replace a silicon vibrating diaphragm with large density, the mass of the vibrating diaphragm structure is reduced, the vibrating diaphragm structure of the rectangular bridge type structure can push out more air, the flexible material increases system damping, a sound pressure level SPL frequency response curve and a THD frequency response curve can be improved, and therefore the tone quality of the MEMS piezoelectric sounder is improved.

The utility model belongs to the technical field of batteries, and particularly discloses an aqueous zinc ion battery which comprises a shell and a battery cell arranged in the shell, the battery cell comprises a positive electrode structure, a negative electrode structure, a diaphragm structure and ZnCl2 / ZnSO4 composite electrolyte, the diaphragm structure is arranged between the positive electrode structure and the negative electrode structure, and the ZnCl2 / ZnSO4 composite electrolyte is arranged in the shell. And the ZnCl2 / ZnSO4 composite electrolyte is poured between the positive electrode structure and the negative electrode structure. According to the aqueous zinc ion battery provided by the utility model, the positive electrode structure consists of the positive electrode current collector and the positive electrode active material layer, the positive electrode active material layer is in close contact with the positive electrode current collector, and the connecting bulge serves as a connecting framework of the positive electrode current collector and the positive electrode active material layer, so that active materials can be effectively prevented from falling off from the positive electrode current collector, and the stability of the positive electrode structure is improved; the negative electrode structure is composed of the conductive polymer coating and the negative electrode active material layer, the conductive polymer coating is beneficial to uniform deposition of zinc ions, and formation of zinc dendrites can be effectively reduced.

The present invention provides a high specific power cathode closed air-cooled fuel cell stack, which includes an air inlet end plate and a current collector insulating plate stacked in sequence; a composite honeycomb cooling fin is arranged between every several single cell module groups, and sealing components are connected to the left and right sides of the composite honeycomb cooling fin; the single cell module group includes an anode single panel, an anode sealing line, a membrane electrode, a cathode sealing line, a bipolar plate, an anode sealing line, a membrane electrode, a cathode sealing line, and a cathode single panel stacked in sequence from the air inlet end plate to the air outlet end plate; a cathode flow field is arranged on the bipolar plate and the cathode single panel, the cathode flow channel of the cathode flow field is a multi-stage branched flow channel, and several diaphragm structures are arranged in the cathode flow channel; the diaphragm structure protrudes along the air flow direction, and a hole is arranged in the middle of the diaphragm structure. The present invention adopts a fin design with high heat dissipation efficiency and a high-efficiency water management flow field structure, which can greatly reduce the temperature difference of the fuel cell stack and improve the specific power of the fuel cell stack.

The invention discloses a sound production device, and relates to the technical field of loudspeakers, the sound production device comprises a device shell and a vibrating diaphragm structure, the vibrating diaphragm structure comprises a plurality of vibrating diaphragms which are arranged on the same side of the device shell, each vibrating diaphragm can be independently driven to produce sound, the plurality of vibrating diaphragms comprise two adjacent vibrating diaphragms which are arranged adjacently, and the two adjacent vibrating diaphragms are arranged on the same side of the device shell. At least one of the two adjacent vibrating diaphragms is annularly arranged, so that the two adjacent vibrating diaphragms can be arranged along the inner and outer directions, the two adjacent vibrating diaphragms are arranged at intervals along the inner and outer directions and are connected through a sealing connecting part, and / or the two adjacent vibrating diaphragms are at least partially overlapped with each other, so that the two adjacent vibrating diaphragms can be arranged along the inner and outer directions. And the sound production device is at least partially sealed on one side of the vibrating diaphragm structure.

The utility model provides a piezoelectric MEMS sounding unit and a loudspeaker, each peripheral area of the upper surface of a substrate is provided with a first piezoelectric composite unit, the middle rectangular area of the substrate is provided with a slotted gap, the edge of each diaphragm of a formed diaphragm structure is anchored, a gap structure is arranged between every two adjacent first piezoelectric composite units, and the first piezoelectric composite units and the second piezoelectric composite units are arranged in the slotted gap. The internal stress of each diaphragm layer in the diaphragm structure of the piezoelectric MEMS sound production unit due to the process can be reduced by arranging the slotting gap; the flexible material is adopted to cover the slotting gap, the flexibility of the vibrating diaphragm structure can be improved, meanwhile, sound leakage of the piezoelectric MEMS sound production unit at low frequency is reduced, the vibration amplitude and the emission sound pressure level are improved, the flexible material with low density is adopted to replace a silicon vibrating diaphragm with high density, the quality of the vibrating diaphragm structure is reduced, and the cost is reduced. The flexible material reduces the quality factor Q of the resonance of the device, and is beneficial to improving a sound pressure level SPL frequency response curve and a THD frequency response curve, thereby improving the tone quality of the piezoelectric MEMS sound production unit.

The embodiment of the invention provides a diaphragm, a battery and a power utilization device, the diaphragm comprises a base film and a heat-resistant layer, and the heat-resistant layer is arranged on at least one side of the base film; the heat-resistant layer comprises a heat-resistant polymer, and after the diaphragm is subjected to heat treatment at 130-150 DEG C for 1-3 hours, the thermal shrinkage rate of the diaphragm is less than 20%. The heat-resistant layer is arranged on at least one side of the base film, so that the stability of the diaphragm at high temperature is improved. The heat-resistant layer improves the membrane rupture temperature of the diaphragm through a heat-resistant polymer, and improves the thermal shrinkage property of the diaphragm to a certain extent. Besides, the heat-resistant layer can further improve the puncture resistance of the diaphragm and improve the lithium dendrite growth inhibition capability of the diaphragm through a heat-resistant polymer, so that potential safety hazards caused by diaphragm structure damage are reduced, the heat stability of the battery diaphragm is ensured, and the safety and the cycle stability of the battery are improved.

The invention discloses a diaphragm and a preparation method thereof, a battery and an electric device. The diaphragm comprises a base film and a coating arranged on at least one surface of the base film, the coating contains organic particles, the organic particles contain nonionic groups, and the volume distribution particle size Dv50 of the organic particles is 1-1.5 [mu] m. The diaphragm provided by the embodiment of the invention simultaneously has good electrolyte infiltration performance and overheating melting response characteristic, so that the barrier property of the diaphragm to transition metal is improved, and the electrochemical performance and the safety performance of the battery are improved. The preparation method can ensure stable performance of the diaphragm structure and the like. The battery comprises the diaphragm.

Provided is a speaker, including: a diaphragm structure including first and second diaphragms, the first diaphragm is configured to push air to vibrate to generate initial sound wave, and a signal of which is modulated based on a signal within an audible sound frequency band; and a cover plate structure enclosing with the diaphragm structure to form sound-generating cavity, the cover plate structure has a sound outlet hole connecting the sound-generating cavity with outside, the initial sound wave in the sound-generating cavity is transmitted to the outside through the at least one sound outlet hole to form a sound signal, the second diaphragm and the cover plate structure generate an acoustic environmental impedance used to modulate the initial sound wave to change sound pressure of the sound signal. The speaker can modulate and output a sound signal covering the audible sound frequency band based on the acoustic environmental impedance.

The invention relates to the technical field of batteries, in particular to a diaphragm structure, a battery, a battery pack, a battery pack and electric equipment. The diaphragm structure comprises a diaphragm, wherein an accommodating space is formed in the diaphragm; and the thermal response material is arranged in the accommodating space, and the thermal response material is suitable for being melted when the heated temperature reaches a preset value and covers the inner surface of the diaphragm. When the diaphragm structure is subjected to thermal runaway, the thermal response material is damaged or melted by heating and is attached to the surface of the diaphragm, so that the risk of thermal runaway is reduced, the safety performance of the diaphragm is improved, the risk of overheating of the battery is reduced, and the safety performance of the battery is improved.

The utility model relates to a membrane structure and a water purification device, and relates to the technical field of water purification treatment. The diaphragm structure comprises a diaphragm group and at least one separator, the diaphragm group comprises at least two layers of diaphragm bodies, the at least two layers of diaphragm bodies are sequentially stacked, and the front surfaces of the two adjacent layers of diaphragm bodies are oppositely arranged to form a water inlet runner; the membrane body is provided with a first side and a second side which are oppositely arranged in a first direction, the first side is provided with a raw water inlet communicated with the water inlet flow channel, and the second side is provided with a concentrated water outlet communicated with the water inlet flow channel; at least one separator is arranged in the water inlet flow channel, and the separator is configured to be capable of separating the water inlet flow channel so as to improve the flow speed of fluid in the water inlet flow channel. According to the technical scheme disclosed by the utility model, the membrane surface concentration polarization layer phenomenon can be weakened, the anti-pollution capability of the membrane structure is improved, and the service life of the membrane structure is prolonged.

The present invention discloses a diaphragm design method for a rocket engine combustion chamber and nozzle strong dynamic load test device, including the steps of: establishing a load distribution model of a shallow groove diaphragm and a steel wire rope, and calculating load distribution data; performing mechanical analysis on the shallow groove diaphragm and the steel wire rope to obtain the bearing performance data of the shallow groove diaphragm and the bearing performance data of the steel wire rope; based on the bearing performance data of the shallow groove diaphragm and the bearing performance data of the steel wire rope, adjusting the number of shallow grooves and the number of steel wire ropes according to the load distribution data to obtain a diaphragm structure with required bearing performance. The present invention adopts a distribution calculation method, obtains load distribution data by establishing a load distribution model, and after analyzing and obtaining the bearing performance data of the shallow groove diaphragm and the bearing performance data of the steel wire rope, adjusts the shallow groove diaphragm and the steel wire rope according to the load distribution data to obtain a diaphragm structure that better matches the test conditions, and the design is simple and the design structure has high accuracy.

The utility model belongs to the technical field of transparent film bags, and discloses a transparent film bag with a diaphragm structure, which comprises a transparent film bag body, the upper parts of the inner walls of the two sides of the transparent film bag body are jointly provided with a pressing and sealing strip, the inner surface of the transparent film bag body is provided with a diaphragm mechanism, and the diaphragm mechanism comprises a contact layer. The membrane mechanism comprises a contact layer, a barrier layer and a protective layer, one side of the contact layer is provided with a transition layer, one side of the transition layer is provided with the barrier layer, one side of the barrier layer is provided with the adhesive layer, and one side of the adhesive layer is provided with the protective layer. Under the action that the blocking layer effectively blocks external factors such as air and moisture and the protection layer protects the internal structure from being damaged, the protection function of the film bag is enhanced, the requirement for all-around protection of articles is met, and the articles are prevented from going bad and being damaged.

The one-way valve comprises a shell, the shell is provided with a hollow water flow channel, a water outlet and a water inlet, the water outlet and the water inlet are communicated with the water flow channel, the one-way valve further comprises a diaphragm structure arranged at the water inlet, the diaphragm structure comprises a rubber head structure, the rubber head structure is arranged in the center of the diaphragm structure and used for forming a sealing face for the water inlet, and the rubber head structure is arranged in the middle of the diaphragm structure. Water flow is prevented from flowing out from the water inlet; the overflowing through holes are uniformly distributed on the outer ring of the rubber head structure in a surrounding manner and are used for water flow to pass through; the sealing structure is arranged on the outer periphery of the diaphragm structure and used for preventing water flow from leaking from the joint of the diaphragm structure and the inner wall of the shell. According to the utility model, the rubber head structure and the sealing structure are arranged together through the diaphragm structure, so that the sealing surface formed by the rubber head structure to the water inlet is always in the central position, the rubber head structure has a good resetting effect, the position deviation of the sealing surface caused by repeated use is avoided, the sealing effect is ensured, and meanwhile, the diaphragm structure is convenient to install.

The utility model discloses a diaphragm piece structure and a battery, the diaphragm piece structure comprises a diaphragm piece body, a first blocking boss and a second blocking boss, and two side edges of the diaphragm piece body respectively extend towards the direction far away from a negative plate to form a first diaphragm lug boss and a second diaphragm lug boss; the first blocking boss is arranged on one side surface, facing the negative plate, of the first diaphragm lug boss; and the second blocking boss is arranged on one side surface, facing the negative plate, of the second diaphragm lug boss. Therefore, after the negative plate, the diaphragm plate body and the positive plate are overlapped, the active substances falling off from the negative plate can be prevented from crossing the diaphragm plate body to be in contact with the positive plate through the first blocking boss and the second blocking boss, so that the problem of short circuit of the battery is avoided.

The invention discloses a pressure loss analysis method for a total heat exchanger core, and belongs to the technical field of total heat exchangers. The pressure loss analysis method comprises the steps that under the preset air volume, flow field solving is conducted on a flow channel of a total heat exchanger core, and pressure loads on the two sides of a diaphragm are obtained; according to the mapping of the pressure loads on the two sides of the diaphragm to the boundary of the diaphragm structure, the deformation of the diaphragm is obtained; according to the mapping of the deformation amount of the diaphragm to the boundary of the flow channel, the flow field of the flow channel of the total heat exchanger core is solved again, and the pressure loads on the two sides of the diaphragm are updated; and repeating the steps until calculation is converged, and outputting a flow field result to obtain the pressure loss of the total heat exchanger core. According to the invention, the pressure loss in the core body can be accurately calculated.

The invention discloses a voice coil motor-based pulse oscillation lung function instrument, which comprises a rotating bracket, and an IOS gas mixing structure is mounted on the rotating bracket; the pulse oscillation generation module comprises a shell, a motor support is fixedly connected into the shell, a voice coil motor is fixedly connected to the motor support, a motion guide column is installed on the voice coil motor, the voice coil motor is in transmission connection with the motion guide column, the shell is provided with an output port, and a diaphragm structure is fixedly connected to the motion guide column and located at the output port. The output port is communicated with the IOS gas mixing structure, and a sensor module is arranged on the IOS gas mixing structure; and the air tap is mounted on the IOS gas mixing structure. The device is suitable for people who are difficult to complete traditional lung function examination, can detect subtle changes which are difficult to find by a traditional lung function instrument, can distinguish resistance changes of the central airway and the peripheral airway through oscillation signals with different frequencies, and provides richer diagnosis information.

The utility model provides a sodium-supplementing battery diaphragm structure and a sodium ion battery. The battery diaphragm structure comprises a base membrane, and a sodium-supplementing layer, a catalyst layer and a conductive layer which are sequentially laminated on the surface of any side of the base membrane. Through the specific design of the battery diaphragm structure, efficient and stable sodium compensation can be realized on the premise of not increasing additional process burden, so that the cycle life of the battery is prolonged, and the overall performance of the battery is improved.

The diaphragm structure comprises a base membrane layer, ceramic layers, a first bonding layer and a second bonding layer, and the ceramic layers are coated on the two side surfaces of the base membrane layer; the surface, far away from the base film layer, of the ceramic layer is coated with a first bonding layer; the base film layer, the ceramic layer and the first bonding layer are equal in width; the edges of the two sides of the face, away from the ceramic layer, of the first bonding layer are coated with second bonding layers in the length direction of the base film layer. The edge of the first bonding layer is coated with the second bonding layer, so that the bonding capacity of the edge of the diaphragm can be effectively improved, the diaphragm and a pole piece can be highly attached in the hot pressing process of the core package, the polarization internal resistance of the lithium ion battery in circulation is reduced, and the purple edge phenomenon of the pole piece is relieved.

The application discloses a micro-nano acoustic image sensor capable of large-scale integration and a control method thereof. The micro-nano acoustic image sensor comprises a plurality of pixel sensing units arranged in an array; each pixel sensing unit comprises a micro-mechanical ultrasonic transducer located at a top layer, a pixel circuit located at a bottom layer and an inter-electrode metal bonding layer connecting the two; wherein the micro-mechanical ultrasonic transducer is an acoustic-electric conversion unit with an inverted diaphragm structure, and is connected to the pixel circuit through a lower electrode layer; the pixel circuit is an integrated circuit internal unit with a "3T1D" structure, has a peak sound pressure rectification function, and synchronously senses and addresses samples the sound pressure signal of each pixel sensing unit through an inverse correlation double sampling method, and the sampling method has a global shutter function. The application can perform large-scale array integration on the pixel sensing unit, and perform tomographic sampling on the spatial distribution of ultrasonic echoes, and can directly realize dynamic intensity imaging and distance tomographic imaging of a target sound field.

The invention provides a lithium-manganese battery. The lithium-manganese battery comprises a positive pole piece, a negative pole piece, a diaphragm and an electrolyte, a positive active material in the positive pole piece comprises manganese dioxide, and the negative pole piece comprises a lithium metal negative pole; the diaphragm comprises a base film and a functional layer positioned on the side, facing the positive pole piece, of the base film; and the functional layer comprises an inorganic solid electrolyte. According to the lithium-manganese battery disclosed by the invention, the diaphragm structure with the inorganic solid electrolyte functional layer is adopted, so that the conduction rate of lithium ions is improved, and meanwhile, the size change of the diaphragm caused by temperature fluctuation or other factors is also remarkably reduced, so that the surface shrinkage rate of the diaphragm is adjusted; and moreover, the side reaction of the lithium metal negative electrode in the use process is effectively inhibited, and the performance of the lithium-manganese battery is improved.